test: introduce env variable mocking (#1490)

.github/workflows/workflow.yml

@@ -125,12 +125,6 @@ jobs:
           profile: minimal
           override: true
 
-      # Install dotnet at a fixed version
-      - name: Setup | DotNet
-        uses: actions/setup-dotnet@v1
-        with:
-          dotnet-version: "2.2.402"
-
       # Install Mercurial (pre-installed on Linux and windows)
       - name: Setup | Mercurial (macos)
         if: matrix.os == 'macOS-latest'

CONTRIBUTING.md

@@ -24,6 +24,52 @@ The project begins in [`main.rs`](src/main.rs), where the appropriate `print::`
 
 Any styling that is applied to a module is inherited by its segments. Module prefixes and suffixes by default don't have any styling applied to them.
 
+## Environment Variables and external commands
+
+We have custom functions to be able to test our modules better. Here we show you how.
+
+### Environment Variables
+
+To get an environment variable we have special function to allow for mocking of vars. Here's a quick example:
+
+```rust
+use super::{Context, Module, RootModuleConfig};
+
+use crate::configs::php::PhpConfig;
+use crate::formatter::StringFormatter;
+use crate::utils;
+
+
+pub fn module<'a>(context: &'a Context) -> Option<Module<'a>> {
+   // Here `my_env_var` will be either the contents of the var or the function
+   // will exit if the variable is not set.
+   let my_env_var = context.get_env("MY_VAR")?;
+
+   // Then you can happily use the value
+}
+```
+
+## External commands
+
+To run a external command (e.g. to get the version of a tool) and to allow for mocking use the `utils::exec_cmd` function. Here's a quick example:
+
+```rust
+use super::{Context, Module, RootModuleConfig};
+
+use crate::configs::php::PhpConfig;
+use crate::formatter::StringFormatter;
+use crate::utils;
+
+
+pub fn module<'a>(context: &'a Context) -> Option<Module<'a>> {
+   // Here `my_env_var` will be either the stdout of the called command or the function
+   // will exit if the called program was not installed or could not be run.
+   let output = utils::exec_cmd("my_command", &["first_arg", "second_arg"])?.stdout;
+
+   // Then you can happily use the output
+}
+```
+
 ## Logging
 
 Debug logging in starship is done with [pretty_env_logger](https://crates.io/crates/pretty_env_logger).
@@ -56,37 +102,81 @@ rustup component add rustfmt
 cargo fmt
 ```
 
-
 ## Testing
 
 Testing is critical to making sure starship works as intended on systems big and small. Starship interfaces with many applications and system APIs when generating the prompt, so there's a lot of room for bugs to slip in.
 
-Unit tests and a subset of integration tests can be run with `cargo test`.
-The full integration test suite is run on GitHub as part of our GitHub Actions continuous integration.
+Unit tests are written using the built-in Rust testing library in the same file as the implementation, as is traditionally done in Rust codebases. These tests can be run with `cargo test` and are run on GitHub as part of our GitHub Actions continuous integration to ensure consistend behavior.
 
-### Unit Testing
+All tests that test the rendered output of a module should use `ModuleRenderer`. For Example:
 
-Unit tests are written using the built-in Rust testing library in the same file as the implementation, as is traditionally done in Rust codebases. These tests can be run with `cargo test`.
+```rust
+use super::{Context, Module, RootModuleConfig};
+
+use crate::configs::php::PhpConfig;
+use crate::formatter::StringFormatter;
+use crate::utils;
+
+
+pub fn module<'a>(context: &'a Context) -> Option<Module<'a>> {
+   /* This is where your module code goes */
+}
+
+#[cfg(test)]
+mod tests {
+   use super::*;
+   use crate::test::ModuleRenderer;
+   use ansi_term::Color;
+   use std::fs::File;
+   use std::io;
+
+
+   #[test]
+   fn should_render() -> io::Result<()> {
+      // Here you setup the testing environment
+      let tempdir = tempfile::tempdir()?;
+      // Create some file needed to render the module
+      File::create(dir.path().join("YOUR_FILE"))?.sync_all()?;
+
+      // The output of the module
+      let actual = ModuleRenderer::new("YOUR_MODULE_NAME")
+         // For a custom path
+         .path(&tempdir.path())
+         // For a custom config
+         .config(toml::toml!{
+            [YOUR_MODULE_NAME]
+            val = 1
+         })
+         // For env mocking
+         .env("KEY","VALUE")
+         // Run the module and collect the output
+         .collect();
+
+      // The value that should be rendered by the module.
+      let expected = Some(format!("{} ",Color::Black.paint("THIS SHOULD BE RENDERED")));
+
+      // Assert that the actual and expected values are the same
+      assert_eq!(actual, expected);
+
+      // Close the tempdir
+      tempdir.close()
+   }
+}
+```
+
+If a module depends on output of another program, then that output should be added to the match statement in [`utils.rs`](src/utils.rs). The match has to be exactly the same as the call to `utils::exec_cmd()`, including positional arguments and flags. The array of arguments are joined by a `" "`, so `utils::exec_cmd("program", &["arg", "more_args"])` would match with the `program arg more_args` match statement.
+
+If the program cannot be mocked (e.g. It performs some filesystem operations, either writing or reading files) then it has to added to the project's GitHub Actions workflow file([`.github/workflows/workflow.yml`](.github/workflows/workflow.yml)) and the test has to be marked with an `#[ignored]`. This ensures that anyone can run the test suite locally without needing to pre-configure their environment. The `#[ignored]` attribute is bypassed during CI runs in GitHub Actions.
 
 Unit tests should be fully isolated, only testing a given function's expected output given a specific input, and should be reproducible on any machine. Unit tests should not expect the computer running them to be in any particular state. This includes having any applications pre-installed, having any environment variables set, etc.
 
 The previous point should be emphasized: even seemingly innocuous ideas like "if we can see the directory, we can read it" or "nobody will have their home directory be a git repo" have bitten us in the past. Having even a single test fail can completely break installation on some platforms, so be careful with tests!
 
-### Integration Testing
-
-Integration tests are located in the [`tests/`](tests) directory and are also written using the built-in Rust testing library.
-
-Integration tests should test full modules or the entire prompt. All integration tests that expect the testing environment to have pre-existing state or tests that make permanent changes to the filesystem should have the `#[ignore]` attribute added to them. All tests that don't depend on any preexisting state will be run alongside the unit tests with `cargo test`.
-
-For tests that depend on having preexisting state, whatever needed state will have to be added to the project's GitHub Actions workflow file([`.github/workflows/workflow.yml`](.github/workflows/workflow.yml)).
-
 ### Test Programming Guidelines
 
 Any tests that depend on File I/O should use [`sync_all()`](https://doc.rust-lang.org/std/fs/struct.File.html#method.sync_all) when creating files or after writing to files.
 
-Any tests that use `tempfile::tempdir` should take care to call `dir.close()` after usage to ensure the lifecycle of the directory can be reasoned about.
-
-Any tests that use `create_fixture_repo()` should remove the returned directory after usage with  `remove_dir_all::remove_dir_all()`.
+Any tests that use `tempfile::tempdir` should take care to call `dir.close()` after usage to ensure the lifecycle of the directory can be reasoned about. This includes `fixture_repo()` as it returns a TempDir that should be closed.
 
 ## Running the Documentation Website Locally
 
@@ -98,17 +188,20 @@ After cloning the project, you can do the following to run the VuePress website
 
 1. `cd` into the `/docs` directory.
 2. Install the project dependencies:
-```
-$ npm install
-```
+
+   ```sh
+   npm install
+   ```
+
 3. Start the project in development mode:
-```
-$ npm run dev
-```
 
-Once setup is complete, you can refer to VuePress documentation on the actual implementation here: https://vuepress.vuejs.org/guide/.
+   ```sh
+   npm run dev
+   ```
 
-### Git/GitHub workflow
+Once setup is complete, you can refer to VuePress documentation on the actual implementation here: <https://vuepress.vuejs.org/guide/>.
+
+## Git/GitHub workflow
 
 This is our preferred process for opening a PR on GitHub:
 

Cargo.lock

@@ -1104,7 +1104,6 @@ dependencies = [
  "quick-xml",
  "rayon",
  "regex",
- "remove_dir_all",
  "serde_json",
  "starship_module_config_derive",
  "sysinfo",

Cargo.toml

@@ -31,7 +31,7 @@ tls-vendored = ["native-tls/vendored"]
 clap = "2.33.1"
 ansi_term = "0.12.1"
 dirs-next = "1.0.1"
-git2 = { version = "0.13.8", default-features = false, features = [] }
+git2 = { version = "0.13.8", default-features = false }
 toml = { version = "0.5.6", features = ["preserve_order"] }
 serde_json = "1.0.57"
 rayon = "1.3.1"
@@ -64,17 +64,19 @@ attohttpc = { version = "0.15.0", optional = true, default-features = false, fea
 native-tls = { version = "0.2", optional = true }
 
 [target.'cfg(windows)'.dependencies]
-winapi = { version = "0.3", features = ["winuser", "securitybaseapi", "processthreadsapi", "handleapi", "impl-default"]}
+winapi = { version = "0.3", features = [
+  "winuser",
+  "securitybaseapi",
+  "processthreadsapi",
+  "handleapi",
+  "impl-default",
+] }
 
 [target.'cfg(not(windows))'.dependencies]
 nix = "0.18.0"
 
 [dev-dependencies]
 tempfile = "3.1.0"
-# More realiable than std::fs version on Windows
-# For removing temporary directories manually when needed
-# This is what tempfile uses to delete temporary directories
-remove_dir_all = "0.5.3"
 
 [profile.release]
 codegen-units = 1

src/bug_report.rs

@@ -1,5 +1,6 @@
 use crate::utils::exec_cmd;
 
+use clap::crate_version;
 use std::fs;
 use std::path::PathBuf;
 
@@ -254,5 +255,6 @@ mod tests {
 
         let config_path = get_config_path("bash");
         assert_eq!("/test/home/.bashrc", config_path.unwrap().to_str().unwrap());
+        env::remove_var("HOME");
     }
 }

src/context.rs

@@ -7,6 +7,7 @@ use git2::{ErrorCode::UnbornBranch, Repository, RepositoryState};
 use once_cell::sync::OnceCell;
 use std::collections::{HashMap, HashSet};
 use std::env;
+use std::ffi::OsString;
 use std::fs;
 use std::path::{Path, PathBuf};
 use std::string::String;
@@ -33,6 +34,9 @@ pub struct Context<'a> {
 
     /// The shell the user is assumed to be running
     pub shell: Shell,
+
+    /// A HashMap of environment variable mocks
+    pub env: HashMap<&'a str, String>,
 }
 
 impl<'a> Context<'a> {
@@ -82,11 +86,30 @@ impl<'a> Context<'a> {
             dir_contents: OnceCell::new(),
             repo: OnceCell::new(),
             shell,
+            env: HashMap::new(),
+        }
+    }
+
+    // Retrives a environment variable from the os or from a table if in testing mode
+    pub fn get_env<K: AsRef<str>>(&self, key: K) -> Option<String> {
+        if cfg!(test) {
+            self.env.get(key.as_ref()).map(|val| val.to_string())
+        } else {
+            env::var(key.as_ref()).ok()
+        }
+    }
+
+    // Retrives a environment variable from the os or from a table if in testing mode (os version)
+    pub fn get_env_os<K: AsRef<str>>(&self, key: K) -> Option<OsString> {
+        if cfg!(test) {
+            self.env.get(key.as_ref()).map(OsString::from)
+        } else {
+            env::var_os(key.as_ref())
         }
     }
 
     /// Convert a `~` in a path to the home directory
-    fn expand_tilde(dir: PathBuf) -> PathBuf {
+    pub fn expand_tilde(dir: PathBuf) -> PathBuf {
         if dir.starts_with("~") {
             let without_home = dir.strip_prefix("~").unwrap();
             return dirs_next::home_dir().unwrap().join(without_home);
@@ -165,7 +188,7 @@ impl<'a> Context<'a> {
     }
 
     fn get_shell() -> Shell {
-        let shell = std::env::var("STARSHIP_SHELL").unwrap_or_default();
+        let shell = env::var("STARSHIP_SHELL").unwrap_or_default();
         match shell.as_str() {
             "bash" => Shell::Bash,
             "fish" => Shell::Fish,
@@ -310,7 +333,7 @@ impl<'a> ScanDir<'a> {
         self
     }
 
-    /// based on the current Pathbuf check to see
+    /// based on the current PathBuf check to see
     /// if any of this criteria match or exist and returning a boolean
     pub fn is_match(&self) -> bool {
         self.dir_contents.has_any_extension(self.extensions)

src/formatter/parser.rs

@@ -1,4 +1,5 @@
 use pest::{error::Error, iterators::Pair, Parser};
+use pest_derive::*;
 
 use super::model::*;
 

src/lib.rs

@@ -1,6 +1,3 @@
-#[macro_use]
-extern crate pest_derive;
-
 // Lib is present to allow for benchmarking
 pub mod config;
 pub mod configs;
@@ -11,3 +8,6 @@ pub mod modules;
 pub mod print;
 pub mod segment;
 mod utils;
+
+#[cfg(test)]
+mod test;

src/main.rs

@@ -1,11 +1,7 @@
+use clap::{crate_authors, crate_version};
 use std::io;
 use std::time::SystemTime;
 
-#[macro_use]
-extern crate clap;
-#[macro_use]
-extern crate pest_derive;
-
 mod bug_report;
 mod config;
 mod configs;
@@ -19,6 +15,9 @@ mod print;
 mod segment;
 mod utils;
 
+#[cfg(test)]
+mod test;
+
 use crate::module::ALL_MODULES;
 use clap::{App, AppSettings, Arg, Shell, SubCommand};
 

src/modules/aws.rs

@@ -1,5 +1,4 @@
 use std::collections::HashMap;
-use std::env;
 use std::fs::File;
 use std::io::{BufRead, BufReader};
 use std::path::PathBuf;
@@ -13,9 +12,9 @@ use crate::formatter::StringFormatter;
 type Profile = String;
 type Region = String;
 
-fn get_aws_region_from_config(aws_profile: Option<&str>) -> Option<Region> {
-    let config_location = env::var("AWS_CONFIG_FILE")
-        .ok()
+fn get_aws_region_from_config(context: &Context, aws_profile: Option<&str>) -> Option<Region> {
+    let config_location = context
+        .get_env("AWS_CONFIG_FILE")
         .and_then(|path| PathBuf::from_str(&path).ok())
         .or_else(|| {
             let mut home = dirs_next::home_dir()?;
@@ -47,19 +46,22 @@ fn get_aws_region_from_config(aws_profile: Option<&str>) -> Option<Region> {
     Some(region.to_string())
 }
 
-fn get_aws_profile_and_region() -> (Option<Profile>, Option<Region>) {
+fn get_aws_profile_and_region(context: &Context) -> (Option<Profile>, Option<Region>) {
     match (
-        env::var("AWS_VAULT")
-            .or_else(|_| env::var("AWS_PROFILE"))
-            .ok(),
-        env::var("AWS_DEFAULT_REGION")
-            .or_else(|_| env::var("AWS_REGION"))
-            .ok(),
+        context
+            .get_env("AWS_VAULT")
+            .or_else(|| context.get_env("AWS_PROFILE")),
+        context
+            .get_env("AWS_DEFAULT_REGION")
+            .or_else(|| context.get_env("AWS_REGION")),
     ) {
         (Some(p), Some(r)) => (Some(p), Some(r)),
         (None, Some(r)) => (None, Some(r)),
-        (Some(ref p), None) => (Some(p.to_owned()), get_aws_region_from_config(Some(p))),
-        (None, None) => (None, get_aws_region_from_config(None)),
+        (Some(ref p), None) => (
+            Some(p.to_owned()),
+            get_aws_region_from_config(context, Some(p)),
+        ),
+        (None, None) => (None, get_aws_region_from_config(context, None)),
     }
 }
 
@@ -74,7 +76,7 @@ pub fn module<'a>(context: &'a Context) -> Option<Module<'a>> {
     let mut module = context.new_module("aws");
     let config: AwsConfig = AwsConfig::try_load(module.config);
 
-    let (aws_profile, aws_region) = get_aws_profile_and_region();
+    let (aws_profile, aws_region) = get_aws_profile_and_region(context);
     if aws_profile.is_none() && aws_region.is_none() {
         return None;
     }
@@ -113,3 +115,278 @@ pub fn module<'a>(context: &'a Context) -> Option<Module<'a>> {
 
     Some(module)
 }
+
+#[cfg(test)]
+mod tests {
+    use crate::test::ModuleRenderer;
+    use ansi_term::Color;
+    use std::fs::File;
+    use std::io::{self, Write};
+
+    #[test]
+    fn no_region_set() -> io::Result<()> {
+        let actual = ModuleRenderer::new("aws").collect();
+        let expected = None;
+
+        assert_eq!(expected, actual);
+        Ok(())
+    }
+
+    #[test]
+    fn region_set() -> io::Result<()> {
+        let actual = ModuleRenderer::new("aws")
+            .env("AWS_REGION", "ap-northeast-2")
+            .collect();
+        let expected = Some(format!(
+            "on {} ",
+            Color::Yellow.bold().paint("☁️  (ap-northeast-2)")
+        ));
+
+        assert_eq!(expected, actual);
+        Ok(())
+    }
+
+    #[test]
+    fn region_set_with_alias() -> io::Result<()> {
+        let actual = ModuleRenderer::new("aws")
+            .env("AWS_REGION", "ap-southeast-2")
+            .config(toml::toml! {
+                [aws.region_aliases]
+                ap-southeast-2 = "au"
+            })
+            .collect();
+        let expected = Some(format!("on {} ", Color::Yellow.bold().paint("☁️  (au)")));
+
+        assert_eq!(expected, actual);
+        Ok(())
+    }
+
+    #[test]
+    fn default_region_set() -> io::Result<()> {
+        let actual = ModuleRenderer::new("aws")
+            .env("AWS_REGION", "ap-northeast-2")
+            .env("AWS_DEFAULT_REGION", "ap-northeast-1")
+            .collect();
+        let expected = Some(format!(
+            "on {} ",
+            Color::Yellow.bold().paint("☁️  (ap-northeast-1)")
+        ));
+
+        assert_eq!(expected, actual);
+        Ok(())
+    }
+
+    #[test]
+    fn profile_set() -> io::Result<()> {
+        let actual = ModuleRenderer::new("aws")
+            .env("AWS_PROFILE", "astronauts")
+            .collect();
+        let expected = Some(format!(
+            "on {} ",
+            Color::Yellow.bold().paint("☁️  astronauts")
+        ));
+
+        assert_eq!(expected, actual);
+        Ok(())
+    }
+
+    #[test]
+    fn profile_set_from_aws_vault() -> io::Result<()> {
+        let actual = ModuleRenderer::new("aws")
+            .env("AWS_VAULT", "astronauts-vault")
+            .env("AWS_PROFILE", "astronauts-profile")
+            .collect();
+        let expected = Some(format!(
+            "on {} ",
+            Color::Yellow.bold().paint("☁️  astronauts-vault")
+        ));
+
+        assert_eq!(expected, actual);
+        Ok(())
+    }
+
+    #[test]
+    fn profile_and_region_set() -> io::Result<()> {
+        let actual = ModuleRenderer::new("aws")
+            .env("AWS_PROFILE", "astronauts")
+            .env("AWS_REGION", "ap-northeast-2")
+            .collect();
+        let expected = Some(format!(
+            "on {} ",
+            Color::Yellow.bold().paint("☁️  astronauts(ap-northeast-2)")
+        ));
+
+        assert_eq!(expected, actual);
+        Ok(())
+    }
+
+    #[test]
+    fn default_profile_set() -> io::Result<()> {
+        let dir = tempfile::tempdir()?;
+        let config_path = dir.path().join("config");
+        let mut file = File::create(&config_path)?;
+
+        file.write_all(
+            "[default]
+region = us-east-1
+
+[profile astronauts]
+region = us-east-2
+"
+            .as_bytes(),
+        )?;
+
+        let actual = ModuleRenderer::new("aws")
+            .env("AWS_CONFIG_FILE", config_path.to_string_lossy().as_ref())
+            .collect();
+        let expected = Some(format!(
+            "on {} ",
+            Color::Yellow.bold().paint("☁️  (us-east-1)")
+        ));
+
+        assert_eq!(expected, actual);
+        dir.close()
+    }
+
+    #[test]
+    fn profile_and_config_set() -> io::Result<()> {
+        let dir = tempfile::tempdir()?;
+        let config_path = dir.path().join("config");
+        let mut file = File::create(&config_path)?;
+
+        file.write_all(
+            "[default]
+region = us-east-1
+
+[profile astronauts]
+region = us-east-2
+"
+            .as_bytes(),
+        )?;
+
+        let actual = ModuleRenderer::new("aws")
+            .env("AWS_CONFIG_FILE", config_path.to_string_lossy().as_ref())
+            .env("AWS_PROFILE", "astronauts")
+            .config(toml::toml! {
+                [aws]
+            })
+            .collect();
+        let expected = Some(format!(
+            "on {} ",
+            Color::Yellow.bold().paint("☁️  astronauts(us-east-2)")
+        ));
+
+        assert_eq!(expected, actual);
+        dir.close()
+    }
+
+    #[test]
+    fn profile_and_region_set_with_display_all() -> io::Result<()> {
+        let actual = ModuleRenderer::new("aws")
+            .env("AWS_PROFILE", "astronauts")
+            .env("AWS_REGION", "ap-northeast-1")
+            .collect();
+        let expected = Some(format!(
+            "on {} ",
+            Color::Yellow.bold().paint("☁️  astronauts(ap-northeast-1)")
+        ));
+
+        assert_eq!(expected, actual);
+        Ok(())
+    }
+
+    #[test]
+    fn profile_set_with_display_all() -> io::Result<()> {
+        let actual = ModuleRenderer::new("aws")
+            .env("AWS_PROFILE", "astronauts")
+            .collect();
+        let expected = Some(format!(
+            "on {} ",
+            Color::Yellow.bold().paint("☁️  astronauts")
+        ));
+
+        assert_eq!(expected, actual);
+        Ok(())
+    }
+
+    #[test]
+    fn region_set_with_display_all() -> io::Result<()> {
+        let actual = ModuleRenderer::new("aws")
+            .env("AWS_REGION", "ap-northeast-1")
+            .collect();
+        let expected = Some(format!(
+            "on {} ",
+            Color::Yellow.bold().paint("☁️  (ap-northeast-1)")
+        ));
+
+        assert_eq!(expected, actual);
+        Ok(())
+    }
+
+    #[test]
+    fn profile_and_region_set_with_display_region() -> io::Result<()> {
+        let actual = ModuleRenderer::new("aws")
+            .env("AWS_PROFILE", "astronauts")
+            .env("AWS_DEFAULT_REGION", "ap-northeast-1")
+            .config(toml::toml! {
+                [aws]
+                format = "on [$symbol$region]($style) "
+            })
+            .collect();
+        let expected = Some(format!(
+            "on {} ",
+            Color::Yellow.bold().paint("☁️  ap-northeast-1")
+        ));
+
+        assert_eq!(expected, actual);
+        Ok(())
+    }
+
+    #[test]
+    fn profile_and_region_set_with_display_profile() -> io::Result<()> {
+        let actual = ModuleRenderer::new("aws")
+            .env("AWS_PROFILE", "astronauts")
+            .env("AWS_REGION", "ap-northeast-1")
+            .config(toml::toml! {
+                [aws]
+                format = "on [$symbol$profile]($style) "
+            })
+            .collect();
+        let expected = Some(format!(
+            "on {} ",
+            Color::Yellow.bold().paint("☁️  astronauts")
+        ));
+
+        assert_eq!(expected, actual);
+        Ok(())
+    }
+
+    #[test]
+    fn region_set_with_display_profile() -> io::Result<()> {
+        let actual = ModuleRenderer::new("aws")
+            .env("AWS_REGION", "ap-northeast-1")
+            .config(toml::toml! {
+                [aws]
+                format = "on [$symbol$profile]($style) "
+            })
+            .collect();
+        let expected = Some(format!("on {} ", Color::Yellow.bold().paint("☁️  ")));
+
+        assert_eq!(expected, actual);
+        Ok(())
+    }
+
+    #[test]
+    fn region_not_set_with_display_region() -> io::Result<()> {
+        let actual = ModuleRenderer::new("aws")
+            .config(toml::toml! {
+                [aws]
+                format = "on [$symbol$region]($style) "
+            })
+            .collect();
+        let expected = None;
+
+        assert_eq!(expected, actual);
+        Ok(())
+    }
+}

src/modules/character.rs

@@ -68,3 +68,142 @@ pub fn module<'a>(context: &'a Context) -> Option<Module<'a>> {
 
     Some(module)
 }
+
+#[cfg(test)]
+mod test {
+    use crate::context::Shell;
+    use crate::test::ModuleRenderer;
+    use ansi_term::Color;
+    use std::io;
+
+    #[test]
+    fn success_status() -> io::Result<()> {
+        let expected = Some(format!("{} ", Color::Green.bold().paint("❯")));
+
+        // Status code 0
+        let actual = ModuleRenderer::new("character").status(0).collect();
+        assert_eq!(expected, actual);
+
+        // No status code
+        let actual = ModuleRenderer::new("character").collect();
+        assert_eq!(expected, actual);
+
+        Ok(())
+    }
+
+    #[test]
+    fn failure_status() -> io::Result<()> {
+        let expected = Some(format!("{} ", Color::Red.bold().paint("❯")));
+
+        let exit_values = [1, 54321, -5000];
+
+        for status in &exit_values {
+            let actual = ModuleRenderer::new("character").status(*status).collect();
+            assert_eq!(expected, actual);
+        }
+
+        Ok(())
+    }
+
+    #[test]
+    fn custom_symbol() -> io::Result<()> {
+        let expected_fail = Some(format!("{} ", Color::Red.bold().paint("✖")));
+        let expected_success = Some(format!("{} ", Color::Green.bold().paint("➜")));
+
+        let exit_values = [1, 54321, -5000];
+
+        // Test failure values
+        for status in &exit_values {
+            let actual = ModuleRenderer::new("character")
+                .config(toml::toml! {
+                    [character]
+                    success_symbol = "[➜](bold green)"
+                    error_symbol = "[✖](bold red)"
+                })
+                .status(*status)
+                .collect();
+            assert_eq!(expected_fail, actual);
+        }
+
+        // Test success
+        let actual = ModuleRenderer::new("character")
+            .config(toml::toml! {
+                [character]
+                success_symbol = "[➜](bold green)"
+                error_symbol = "[✖](bold red)"
+            })
+            .status(0)
+            .collect();
+        assert_eq!(expected_success, actual);
+
+        Ok(())
+    }
+
+    #[test]
+    fn zsh_keymap() -> io::Result<()> {
+        let expected_vicmd = Some(format!("{} ", Color::Green.bold().paint("❮")));
+        let expected_specified = Some(format!("{} ", Color::Green.bold().paint("V")));
+        let expected_other = Some(format!("{} ", Color::Green.bold().paint("❯")));
+
+        // zle keymap is vicmd
+        let actual = ModuleRenderer::new("character")
+            .shell(Shell::Zsh)
+            .keymap("vicmd")
+            .collect();
+        assert_eq!(expected_vicmd, actual);
+
+        // specified vicmd character
+        let actual = ModuleRenderer::new("character")
+            .config(toml::toml! {
+                [character]
+                vicmd_symbol = "[V](bold green)"
+            })
+            .shell(Shell::Zsh)
+            .keymap("vicmd")
+            .collect();
+        assert_eq!(expected_specified, actual);
+
+        // zle keymap is other
+        let actual = ModuleRenderer::new("character")
+            .shell(Shell::Zsh)
+            .keymap("visual")
+            .collect();
+        assert_eq!(expected_other, actual);
+
+        Ok(())
+    }
+
+    #[test]
+    fn fish_keymap() -> io::Result<()> {
+        let expected_vicmd = Some(format!("{} ", Color::Green.bold().paint("❮")));
+        let expected_specified = Some(format!("{} ", Color::Green.bold().paint("V")));
+        let expected_other = Some(format!("{} ", Color::Green.bold().paint("❯")));
+
+        // fish keymap is default
+        let actual = ModuleRenderer::new("character")
+            .shell(Shell::Fish)
+            .keymap("default")
+            .collect();
+        assert_eq!(expected_vicmd, actual);
+
+        // specified vicmd character
+        let actual = ModuleRenderer::new("character")
+            .config(toml::toml! {
+                [character]
+                vicmd_symbol = "[V](bold green)"
+            })
+            .shell(Shell::Fish)
+            .keymap("default")
+            .collect();
+        assert_eq!(expected_specified, actual);
+
+        // fish keymap is other
+        let actual = ModuleRenderer::new("character")
+            .shell(Shell::Fish)
+            .keymap("visual")
+            .collect();
+        assert_eq!(expected_other, actual);
+
+        Ok(())
+    }
+}

src/modules/cmake.rs

@@ -58,7 +58,7 @@ fn format_cmake_version(cmake_version: &str) -> Option<String> {
 
 #[cfg(test)]
 mod tests {
-    use crate::modules::utils::test::render_module;
+    use crate::test::ModuleRenderer;
     use ansi_term::Color;
     use std::fs::File;
     use std::io;
@@ -66,7 +66,7 @@ mod tests {
     #[test]
     fn folder_without_cmake_lists() -> io::Result<()> {
         let dir = tempfile::tempdir()?;
-        let actual = render_module("cmake", dir.path(), None);
+        let actual = ModuleRenderer::new("cmake").path(dir.path()).collect();
         let expected = None;
         assert_eq!(expected, actual);
         dir.close()
@@ -76,7 +76,7 @@ mod tests {
     fn folder_with_cmake_lists() -> io::Result<()> {
         let dir = tempfile::tempdir()?;
         File::create(dir.path().join("CMakeLists.txt"))?.sync_all()?;
-        let actual = render_module("cmake", dir.path(), None);
+        let actual = ModuleRenderer::new("cmake").path(dir.path()).collect();
         let expected = Some(format!("via {} ", Color::Blue.bold().paint("🛆 v3.17.3")));
         assert_eq!(expected, actual);
         dir.close()

src/modules/cmd_duration.rs

@@ -89,6 +89,9 @@ fn render_time_component((component, suffix): (&u128, &&str)) -> String {
 #[cfg(test)]
 mod tests {
     use super::*;
+    use crate::test::ModuleRenderer;
+    use ansi_term::Color;
+    use std::io;
 
     #[test]
     fn test_500ms() {
@@ -110,4 +113,86 @@ mod tests {
     fn test_1d() {
         assert_eq!(render_time(86_400_000 as u128, true), "1d")
     }
+
+    #[test]
+    fn config_blank_duration_1s() -> io::Result<()> {
+        let actual = ModuleRenderer::new("cmd_duration")
+            .cmd_duration(1000)
+            .collect();
+
+        let expected = None;
+        assert_eq!(expected, actual);
+        Ok(())
+    }
+
+    #[test]
+    fn config_blank_duration_5s() -> io::Result<()> {
+        let actual = ModuleRenderer::new("cmd_duration")
+            .cmd_duration(5000)
+            .collect();
+
+        let expected = Some(format!("took {} ", Color::Yellow.bold().paint("5s")));
+        assert_eq!(expected, actual);
+        Ok(())
+    }
+
+    #[test]
+    fn config_5s_duration_3s() -> io::Result<()> {
+        let actual = ModuleRenderer::new("cmd_duration")
+            .config(toml::toml! {
+                [cmd_duration]
+                min_time = 5000
+            })
+            .cmd_duration(3000)
+            .collect();
+
+        let expected = None;
+        assert_eq!(expected, actual);
+        Ok(())
+    }
+
+    #[test]
+    fn config_5s_duration_10s() -> io::Result<()> {
+        let actual = ModuleRenderer::new("cmd_duration")
+            .config(toml::toml! {
+                [cmd_duration]
+                min_time = 5000
+            })
+            .cmd_duration(10000)
+            .collect();
+
+        let expected = Some(format!("took {} ", Color::Yellow.bold().paint("10s")));
+        assert_eq!(expected, actual);
+        Ok(())
+    }
+
+    #[test]
+    fn config_1s_duration_prefix_underwent() -> io::Result<()> {
+        let actual = ModuleRenderer::new("cmd_duration")
+            .config(toml::toml! {
+                [cmd_duration]
+                format = "underwent [$duration]($style) "
+            })
+            .cmd_duration(1000)
+            .collect();
+
+        let expected = None;
+        assert_eq!(expected, actual);
+        Ok(())
+    }
+
+    #[test]
+    fn config_5s_duration_prefix_underwent() -> io::Result<()> {
+        let actual = ModuleRenderer::new("cmd_duration")
+            .config(toml::toml! {
+                [cmd_duration]
+                format = "underwent [$duration]($style) "
+            })
+            .cmd_duration(5000)
+            .collect();
+
+        let expected = Some(format!("underwent {} ", Color::Yellow.bold().paint("5s")));
+        assert_eq!(expected, actual);
+        Ok(())
+    }
 }

src/modules/conda.rs

@@ -1,5 +1,3 @@
-use std::env;
-
 use super::{Context, Module, RootModuleConfig};
 
 use super::utils::directory::truncate;
@@ -11,7 +9,9 @@ use crate::formatter::StringFormatter;
 /// Will display the Conda environment iff `$CONDA_DEFAULT_ENV` is set.
 pub fn module<'a>(context: &'a Context) -> Option<Module<'a>> {
     // Reference implementation: https://github.com/denysdovhan/spaceship-prompt/blob/master/sections/conda.zsh
-    let conda_env = env::var("CONDA_DEFAULT_ENV").unwrap_or_else(|_| "".into());
+    let conda_env = context
+        .get_env("CONDA_DEFAULT_ENV")
+        .unwrap_or_else(|| "".into());
     if conda_env.trim().is_empty() {
         return None;
     }
@@ -52,3 +52,63 @@ pub fn module<'a>(context: &'a Context) -> Option<Module<'a>> {
 
     Some(module)
 }
+
+#[cfg(test)]
+mod tests {
+    use crate::test::ModuleRenderer;
+    use ansi_term::Color;
+    use std::io;
+
+    #[test]
+    fn not_in_env() -> io::Result<()> {
+        let actual = ModuleRenderer::new("conda").collect();
+
+        let expected = None;
+
+        assert_eq!(expected, actual);
+        Ok(())
+    }
+
+    #[test]
+    fn ignore_base() -> io::Result<()> {
+        let actual = ModuleRenderer::new("conda")
+            .env("CONDA_DEFAULT_ENV", "base")
+            .config(toml::toml! {
+                [conda]
+                ignore_base = true
+            })
+            .collect();
+
+        let expected = None;
+
+        assert_eq!(expected, actual);
+        Ok(())
+    }
+
+    #[test]
+    fn env_set() -> io::Result<()> {
+        let actual = ModuleRenderer::new("conda")
+            .env("CONDA_DEFAULT_ENV", "astronauts")
+            .collect();
+
+        let expected = Some(format!(
+            "via {} ",
+            Color::Green.bold().paint("🅒 astronauts")
+        ));
+
+        assert_eq!(expected, actual);
+        Ok(())
+    }
+
+    #[test]
+    fn truncate() -> io::Result<()> {
+        let actual = ModuleRenderer::new("conda")
+            .env("CONDA_DEFAULT_ENV", "/some/really/long/and/really/annoying/path/that/shouldnt/be/displayed/fully/conda/my_env")
+            .collect();
+
+        let expected = Some(format!("via {} ", Color::Green.bold().paint("🅒 my_env")));
+
+        assert_eq!(expected, actual);
+        Ok(())
+    }
+}

src/modules/crystal.rs

@@ -68,7 +68,7 @@ fn format_crystal_version(crystal_version: &str) -> Option<String> {
 
 #[cfg(test)]
 mod tests {
-    use crate::modules::utils::test::render_module;
+    use crate::test::ModuleRenderer;
     use ansi_term::Color;
     use std::fs::File;
     use std::io;
@@ -76,7 +76,7 @@ mod tests {
     #[test]
     fn folder_without_crystal_files() -> io::Result<()> {
         let dir = tempfile::tempdir()?;
-        let actual = render_module("crystal", dir.path(), None);
+        let actual = ModuleRenderer::new("crystal").path(dir.path()).collect();
         let expected = None;
         assert_eq!(expected, actual);
 
@@ -88,7 +88,7 @@ mod tests {
         let dir = tempfile::tempdir()?;
         File::create(dir.path().join("shard.yml"))?.sync_all()?;
 
-        let actual = render_module("crystal", dir.path(), None);
+        let actual = ModuleRenderer::new("crystal").path(dir.path()).collect();
         let expected = Some(format!("via {} ", Color::Red.bold().paint("🔮 v0.35.1")));
         assert_eq!(expected, actual);
 
@@ -100,7 +100,7 @@ mod tests {
         let dir = tempfile::tempdir()?;
         File::create(dir.path().join("main.cr"))?.sync_all()?;
 
-        let actual = render_module("crystal", dir.path(), None);
+        let actual = ModuleRenderer::new("crystal").path(dir.path()).collect();
         let expected = Some(format!("via {} ", Color::Red.bold().paint("🔮 v0.35.1")));
         assert_eq!(expected, actual);
 

src/modules/dart.rs

@@ -68,7 +68,7 @@ fn parse_dart_version(dart_version: &str) -> Option<String> {
 #[cfg(test)]
 mod tests {
     use super::parse_dart_version;
-    use crate::modules::utils::test::render_module;
+    use crate::test::ModuleRenderer;
     use ansi_term::Color;
     use std::fs::{self, File};
     use std::io;
@@ -82,7 +82,7 @@ mod tests {
     #[test]
     fn folder_without_dart_file() -> io::Result<()> {
         let dir = tempfile::tempdir()?;
-        let actual = render_module("dart", dir.path(), None);
+        let actual = ModuleRenderer::new("dart").path(dir.path()).collect();
         let expected = None;
         assert_eq!(expected, actual);
         dir.close()
@@ -93,7 +93,7 @@ mod tests {
         let dir = tempfile::tempdir()?;
         File::create(dir.path().join("any.dart"))?.sync_all()?;
 
-        let actual = render_module("dart", dir.path(), None);
+        let actual = ModuleRenderer::new("dart").path(dir.path()).collect();
         let expected = Some(format!("via {} ", Color::Blue.bold().paint("🎯 v2.8.4")));
         assert_eq!(expected, actual);
         dir.close()
@@ -104,7 +104,7 @@ mod tests {
         let dir = tempfile::tempdir()?;
         fs::create_dir_all(dir.path().join(".dart_tool"))?;
 
-        let actual = render_module("dart", dir.path(), None);
+        let actual = ModuleRenderer::new("dart").path(dir.path()).collect();
         let expected = Some(format!("via {} ", Color::Blue.bold().paint("🎯 v2.8.4")));
         assert_eq!(expected, actual);
         dir.close()
@@ -115,7 +115,7 @@ mod tests {
         let dir = tempfile::tempdir()?;
         File::create(dir.path().join("pubspec.yaml"))?.sync_all()?;
 
-        let actual = render_module("dart", dir.path(), None);
+        let actual = ModuleRenderer::new("dart").path(dir.path()).collect();
         let expected = Some(format!("via {} ", Color::Blue.bold().paint("🎯 v2.8.4")));
         assert_eq!(expected, actual);
         dir.close()
@@ -126,7 +126,7 @@ mod tests {
         let dir = tempfile::tempdir()?;
         File::create(dir.path().join("pubspec.yml"))?.sync_all()?;
 
-        let actual = render_module("dart", dir.path(), None);
+        let actual = ModuleRenderer::new("dart").path(dir.path()).collect();
         let expected = Some(format!("via {} ", Color::Blue.bold().paint("🎯 v2.8.4")));
         assert_eq!(expected, actual);
         dir.close()
@@ -137,7 +137,7 @@ mod tests {
         let dir = tempfile::tempdir()?;
         File::create(dir.path().join("pubspec.lock"))?.sync_all()?;
 
-        let actual = render_module("dart", dir.path(), None);
+        let actual = ModuleRenderer::new("dart").path(dir.path()).collect();
         let expected = Some(format!("via {} ", Color::Blue.bold().paint("🎯 v2.8.4")));
         assert_eq!(expected, actual);
         dir.close()

src/modules/directory.rs

@@ -18,10 +18,12 @@ use crate::formatter::StringFormatter;
 /// Creates a module with the current directory
 ///
 /// Will perform path contraction, substitution, and truncation.
+///
 /// **Contraction**
-///     - Paths beginning with the home directory or with a git repo right
-/// inside the home directory will be contracted to `~`
-///     - Paths containing a git repo will contract to begin at the repo root
+///
+/// - Paths beginning with the home directory or with a git repo right inside
+///   the home directory will be contracted to `~`
+/// - Paths containing a git repo will contract to begin at the repo root
 ///
 /// **Substitution**
 /// Paths will undergo user-provided substitutions of substrings
@@ -37,10 +39,10 @@ pub fn module<'a>(context: &'a Context) -> Option<Module<'a>> {
     // Using environment PWD is the standard approach for determining logical path
     // If this is None for any reason, we fall back to reading the os-provided path
     let physical_current_dir = if config.use_logical_path {
-        match std::env::var("PWD") {
-            Ok(x) => Some(PathBuf::from(x)),
-            Err(e) => {
-                log::debug!("Error getting PWD environment variable: {}", e);
+        match context.get_env("PWD") {
+            Some(x) => Some(PathBuf::from(x)),
+            None => {
+                log::debug!("Error getting PWD environment variable!");
                 None
             }
         }
@@ -269,6 +271,17 @@ fn to_fish_style(pwd_dir_length: usize, dir_string: String, truncated_dir_string
 #[cfg(test)]
 mod tests {
     use super::*;
+    use crate::test::ModuleRenderer;
+    use ansi_term::Color;
+    use dirs_next::home_dir;
+    #[cfg(not(target_os = "windows"))]
+    use std::os::unix::fs::symlink;
+    #[cfg(target_os = "windows")]
+    use std::os::windows::fs::symlink_dir as symlink;
+    use std::path::Path;
+    use std::process::Command;
+    use std::{fs, io};
+    use tempfile::TempDir;
 
     #[test]
     fn contract_home_directory() {
@@ -355,7 +368,7 @@ mod tests {
 
     #[test]
     fn fish_style_with_no_contracted_path() {
-        // `truncatation_length = 2`
+        // `truncation_length = 2`
         let path = "/absolute/Path/not/in_a/repo/but_nested";
         let output = to_fish_style(1, path.to_string(), "repo/but_nested");
         assert_eq!(output, "/a/P/n/i/");
@@ -363,7 +376,7 @@ mod tests {
 
     #[test]
     fn fish_style_with_pwd_dir_len_no_contracted_path() {
-        // `truncatation_length = 2`
+        // `truncation_length = 2`
         let path = "/absolute/Path/not/in_a/repo/but_nested";
         let output = to_fish_style(2, path.to_string(), "repo/but_nested");
         assert_eq!(output, "/ab/Pa/no/in/");
@@ -382,4 +395,777 @@ mod tests {
         let output = to_fish_style(1, path.to_string(), "目录");
         assert_eq!(output, "~/s/t/目/a̐/");
     }
+
+    fn init_repo(path: &Path) -> io::Result<()> {
+        Command::new("git")
+            .args(&["init"])
+            .current_dir(path)
+            .output()
+            .map(|_| ())
+    }
+
+    fn make_known_tempdir(root: &Path) -> io::Result<(TempDir, String)> {
+        fs::create_dir_all(root)?;
+        let dir = TempDir::new_in(root)?;
+        let path = dir
+            .path()
+            .file_name()
+            .unwrap()
+            .to_string_lossy()
+            .to_string();
+        Ok((dir, path))
+    }
+
+    #[cfg(not(target_os = "windows"))]
+    mod linux {
+        use super::*;
+        use std::sync::atomic::{AtomicBool, Ordering};
+
+        // As tests are run in parallel we have to keep a lock on which of the
+        // two tests are currently running as they both modify `HOME` which can
+        // override the other value resulting in inconsistent runs which is why
+        // we only run one of these tests at once.
+        static LOCK: AtomicBool = AtomicBool::new(false);
+
+        #[test]
+        #[ignore]
+        fn symlinked_subdirectory_git_repo_out_of_tree() -> io::Result<()> {
+            while LOCK.load(Ordering::Relaxed) {}
+            LOCK.store(true, Ordering::Relaxed);
+            let tmp_dir = TempDir::new_in(home_dir().unwrap().as_path())?;
+            let repo_dir = tmp_dir.path().join("above-repo").join("rocket-controls");
+            let src_dir = repo_dir.join("src/meters/fuel-gauge");
+            let symlink_dir = tmp_dir.path().join("fuel-gauge");
+            fs::create_dir_all(&src_dir)?;
+            init_repo(&repo_dir)?;
+            symlink(&src_dir, &symlink_dir)?;
+
+            // We can't mock `HOME` since dirs-next uses it which does not care about our mocking
+            let previous_home = home_dir().unwrap();
+
+            std::env::set_var("HOME", tmp_dir.path());
+
+            let actual = ModuleRenderer::new("directory").path(symlink_dir).collect();
+            let expected = Some(format!("{} ", Color::Cyan.bold().paint("~/fuel-gauge")));
+
+            std::env::set_var("HOME", previous_home.as_path());
+
+            assert_eq!(expected, actual);
+
+            LOCK.store(false, Ordering::Relaxed);
+
+            tmp_dir.close()
+        }
+
+        #[test]
+        #[ignore]
+        fn git_repo_in_home_directory_truncate_to_repo_true() -> io::Result<()> {
+            while LOCK.load(Ordering::Relaxed) {}
+            LOCK.store(true, Ordering::Relaxed);
+            let tmp_dir = TempDir::new_in(home_dir().unwrap().as_path())?;
+            let dir = tmp_dir.path().join("src/fuel-gauge");
+            fs::create_dir_all(&dir)?;
+            init_repo(&tmp_dir.path())?;
+
+            // We can't mock `HOME` since dirs-next uses it which does not care about our mocking
+            let previous_home = home_dir().unwrap();
+
+            std::env::set_var("HOME", tmp_dir.path());
+
+            let actual = ModuleRenderer::new("directory")
+                .config(toml::toml! {
+                    [directory]
+                    // `truncate_to_repo = true` should attempt to display the truncated path
+                    truncate_to_repo = true
+                    truncation_length = 5
+                })
+                .path(dir)
+                .collect();
+            let expected = Some(format!("{} ", Color::Cyan.bold().paint("~/src/fuel-gauge")));
+
+            std::env::set_var("HOME", previous_home.as_path());
+
+            assert_eq!(expected, actual);
+
+            LOCK.store(false, Ordering::Relaxed);
+
+            tmp_dir.close()
+        }
+
+        #[test]
+        fn directory_in_root() -> io::Result<()> {
+            let actual = ModuleRenderer::new("directory").path("/etc").collect();
+            let expected = Some(format!(
+                "{}{} ",
+                Color::Cyan.bold().paint("/etc"),
+                Color::Red.normal().paint("🔒")
+            ));
+
+            assert_eq!(expected, actual);
+            Ok(())
+        }
+    }
+
+    #[test]
+    fn home_directory() -> io::Result<()> {
+        let actual = ModuleRenderer::new("directory")
+            .path(home_dir().unwrap())
+            .config(toml::toml! { // Necessary if homedir is a git repo
+                [directory]
+                truncate_to_repo = false
+            })
+            .collect();
+        let expected = Some(format!("{} ", Color::Cyan.bold().paint("~")));
+
+        assert_eq!(expected, actual);
+        Ok(())
+    }
+
+    #[test]
+    fn substituted_truncated_path() -> io::Result<()> {
+        let actual = ModuleRenderer::new("directory")
+            .path("/some/long/network/path/workspace/a/b/c/dev")
+            .config(toml::toml! {
+                [directory]
+                truncation_length = 4
+                [directory.substitutions]
+                "/some/long/network/path" = "/some/net"
+                "a/b/c" = "d"
+            })
+            .collect();
+        let expected = Some(format!(
+            "{} ",
+            Color::Cyan.bold().paint("net/workspace/d/dev")
+        ));
+
+        assert_eq!(expected, actual);
+        Ok(())
+    }
+
+    #[test]
+    fn strange_substitution() -> io::Result<()> {
+        let strange_sub = "/\\/;,!";
+        let actual = ModuleRenderer::new("directory")
+            .path("/foo/bar/regular/path")
+            .config(toml::toml! {
+                [directory]
+                truncation_length = 0
+                fish_style_pwd_dir_length = 2 // Overridden by substitutions
+                [directory.substitutions]
+                "regular" = strange_sub
+            })
+            .collect();
+        let expected = Some(format!(
+            "{} ",
+            Color::Cyan
+                .bold()
+                .paint(format!("/foo/bar/{}/path", strange_sub))
+        ));
+
+        assert_eq!(expected, actual);
+        Ok(())
+    }
+
+    #[test]
+    fn directory_in_home() -> io::Result<()> {
+        let (tmp_dir, name) = make_known_tempdir(home_dir().unwrap().as_path())?;
+        let dir = tmp_dir.path().join("starship");
+        fs::create_dir_all(&dir)?;
+
+        let actual = ModuleRenderer::new("directory").path(dir).collect();
+        let expected = Some(format!(
+            "{} ",
+            Color::Cyan.bold().paint(format!("~/{}/starship", name))
+        ));
+
+        assert_eq!(expected, actual);
+        tmp_dir.close()
+    }
+
+    #[test]
+    fn truncated_directory_in_home() -> io::Result<()> {
+        let (tmp_dir, name) = make_known_tempdir(home_dir().unwrap().as_path())?;
+        let dir = tmp_dir.path().join("engine/schematics");
+        fs::create_dir_all(&dir)?;
+
+        let actual = ModuleRenderer::new("directory").path(dir).collect();
+        let expected = Some(format!(
+            "{} ",
+            Color::Cyan
+                .bold()
+                .paint(format!("{}/engine/schematics", name))
+        ));
+
+        assert_eq!(expected, actual);
+        tmp_dir.close()
+    }
+
+    #[test]
+    fn fish_directory_in_home() -> io::Result<()> {
+        let (tmp_dir, name) = make_known_tempdir(home_dir().unwrap().as_path())?;
+        let dir = tmp_dir.path().join("starship/schematics");
+        fs::create_dir_all(&dir)?;
+
+        let actual = ModuleRenderer::new("directory")
+            .config(toml::toml! {
+                [directory]
+                truncation_length = 1
+                fish_style_pwd_dir_length = 2
+            })
+            .path(&dir)
+            .collect();
+        let expected = Some(format!(
+            "{} ",
+            Color::Cyan
+                .bold()
+                .paint(format!("~/{}/st/schematics", name.split_at(3).0))
+        ));
+
+        assert_eq!(expected, actual);
+        tmp_dir.close()
+    }
+
+    #[test]
+    fn root_directory() -> io::Result<()> {
+        let actual = ModuleRenderer::new("directory").path("/").collect();
+        #[cfg(not(target_os = "windows"))]
+        let expected = Some(format!(
+            "{}{} ",
+            Color::Cyan.bold().paint("/"),
+            Color::Red.normal().paint("🔒")
+        ));
+        #[cfg(target_os = "windows")]
+        let expected = Some(format!("{} ", Color::Cyan.bold().paint("/")));
+
+        assert_eq!(expected, actual);
+        Ok(())
+    }
+
+    #[test]
+    fn truncated_directory_in_root() -> io::Result<()> {
+        let (tmp_dir, name) = make_known_tempdir(Path::new("/tmp"))?;
+        let dir = tmp_dir.path().join("thrusters/rocket");
+        fs::create_dir_all(&dir)?;
+
+        let actual = ModuleRenderer::new("directory").path(dir).collect();
+        let expected = Some(format!(
+            "{} ",
+            Color::Cyan
+                .bold()
+                .paint(format!("{}/thrusters/rocket", name))
+        ));
+
+        assert_eq!(expected, actual);
+        tmp_dir.close()
+    }
+
+    #[test]
+    fn truncated_directory_config_large() -> io::Result<()> {
+        let (tmp_dir, _) = make_known_tempdir(Path::new("/tmp"))?;
+        let dir = tmp_dir.path().join("thrusters/rocket");
+        fs::create_dir_all(&dir)?;
+
+        let actual = ModuleRenderer::new("directory")
+            .config(toml::toml! {
+                [directory]
+                truncation_length = 100
+            })
+            .path(&dir)
+            .collect();
+        let expected = Some(format!(
+            "{} ",
+            Color::Cyan
+                .bold()
+                .paint(truncate(dir.to_slash_lossy(), 100))
+        ));
+
+        assert_eq!(expected, actual);
+        tmp_dir.close()
+    }
+
+    #[test]
+    fn fish_style_directory_config_large() -> io::Result<()> {
+        let (tmp_dir, _) = make_known_tempdir(Path::new("/tmp"))?;
+        let dir = tmp_dir.path().join("thrusters/rocket");
+        fs::create_dir_all(&dir)?;
+
+        let actual = ModuleRenderer::new("directory")
+            .config(toml::toml! {
+                [directory]
+                truncation_length = 1
+                fish_style_pwd_dir_length = 100
+            })
+            .path(&dir)
+            .collect();
+        let expected = Some(format!(
+            "{} ",
+            Color::Cyan
+                .bold()
+                .paint(to_fish_style(100, dir.to_slash_lossy(), ""))
+        ));
+
+        assert_eq!(expected, actual);
+        tmp_dir.close()
+    }
+
+    #[test]
+    fn truncated_directory_config_small() -> io::Result<()> {
+        let (tmp_dir, name) = make_known_tempdir(Path::new("/tmp"))?;
+        let dir = tmp_dir.path().join("rocket");
+        fs::create_dir_all(&dir)?;
+
+        let actual = ModuleRenderer::new("directory")
+            .config(toml::toml! {
+                [directory]
+                truncation_length = 2
+            })
+            .path(dir)
+            .collect();
+        let expected = Some(format!(
+            "{} ",
+            Color::Cyan.bold().paint(format!("{}/rocket", name))
+        ));
+
+        assert_eq!(expected, actual);
+        tmp_dir.close()
+    }
+
+    #[test]
+    fn fish_directory_config_small() -> io::Result<()> {
+        let (tmp_dir, _) = make_known_tempdir(Path::new("/tmp"))?;
+        let dir = tmp_dir.path().join("thrusters/rocket");
+        fs::create_dir_all(&dir)?;
+
+        let actual = ModuleRenderer::new("directory")
+            .config(toml::toml! {
+                [directory]
+                truncation_length = 2
+                fish_style_pwd_dir_length = 1
+            })
+            .path(&dir)
+            .collect();
+        let expected = Some(format!(
+            "{} ",
+            Color::Cyan.bold().paint(format!(
+                "{}/thrusters/rocket",
+                to_fish_style(1, dir.to_slash_lossy(), "/thrusters/rocket")
+            ))
+        ));
+
+        assert_eq!(expected, actual);
+        tmp_dir.close()
+    }
+
+    #[test]
+    #[ignore]
+    fn git_repo_root() -> io::Result<()> {
+        let tmp_dir = TempDir::new()?;
+        let repo_dir = tmp_dir.path().join("rocket-controls");
+        fs::create_dir(&repo_dir)?;
+        init_repo(&repo_dir).unwrap();
+
+        let actual = ModuleRenderer::new("directory").path(repo_dir).collect();
+        let expected = Some(format!("{} ", Color::Cyan.bold().paint("rocket-controls")));
+
+        assert_eq!(expected, actual);
+        tmp_dir.close()
+    }
+
+    #[test]
+    #[ignore]
+    fn directory_in_git_repo() -> io::Result<()> {
+        let tmp_dir = TempDir::new()?;
+        let repo_dir = tmp_dir.path().join("rocket-controls");
+        let dir = repo_dir.join("src");
+        fs::create_dir_all(&dir)?;
+        init_repo(&repo_dir).unwrap();
+
+        let actual = ModuleRenderer::new("directory").path(dir).collect();
+        let expected = Some(format!(
+            "{} ",
+            Color::Cyan.bold().paint("rocket-controls/src")
+        ));
+
+        assert_eq!(expected, actual);
+        tmp_dir.close()
+    }
+
+    #[test]
+    #[ignore]
+    fn truncated_directory_in_git_repo() -> io::Result<()> {
+        let tmp_dir = TempDir::new()?;
+        let repo_dir = tmp_dir.path().join("rocket-controls");
+        let dir = repo_dir.join("src/meters/fuel-gauge");
+        fs::create_dir_all(&dir)?;
+        init_repo(&repo_dir).unwrap();
+
+        let actual = ModuleRenderer::new("directory").path(dir).collect();
+        let expected = Some(format!(
+            "{} ",
+            Color::Cyan.bold().paint("src/meters/fuel-gauge")
+        ));
+
+        assert_eq!(expected, actual);
+        tmp_dir.close()
+    }
+
+    #[test]
+    #[ignore]
+    fn directory_in_git_repo_truncate_to_repo_false() -> io::Result<()> {
+        let tmp_dir = TempDir::new()?;
+        let repo_dir = tmp_dir.path().join("above-repo").join("rocket-controls");
+        let dir = repo_dir.join("src/meters/fuel-gauge");
+        fs::create_dir_all(&dir)?;
+        init_repo(&repo_dir).unwrap();
+
+        let actual = ModuleRenderer::new("directory")
+            .config(toml::toml! {
+                [directory]
+                // Don't truncate the path at all.
+                truncation_length = 5
+                truncate_to_repo = false
+            })
+            .path(dir)
+            .collect();
+        let expected = Some(format!(
+            "{} ",
+            Color::Cyan
+                .bold()
+                .paint("above-repo/rocket-controls/src/meters/fuel-gauge")
+        ));
+
+        assert_eq!(expected, actual);
+        tmp_dir.close()
+    }
+
+    #[test]
+    #[ignore]
+    fn fish_path_directory_in_git_repo_truncate_to_repo_false() -> io::Result<()> {
+        let (tmp_dir, _) = make_known_tempdir(Path::new("/tmp"))?;
+        let repo_dir = tmp_dir.path().join("above-repo").join("rocket-controls");
+        let dir = repo_dir.join("src/meters/fuel-gauge");
+        fs::create_dir_all(&dir)?;
+        init_repo(&repo_dir).unwrap();
+
+        let actual = ModuleRenderer::new("directory")
+            .config(toml::toml! {
+                [directory]
+                // Don't truncate the path at all.
+                truncation_length = 5
+                truncate_to_repo = false
+                fish_style_pwd_dir_length = 1
+            })
+            .path(dir)
+            .collect();
+        let expected = Some(format!(
+            "{} ",
+            Color::Cyan.bold().paint(format!(
+                "{}/above-repo/rocket-controls/src/meters/fuel-gauge",
+                to_fish_style(1, tmp_dir.path().to_slash_lossy(), "")
+            ))
+        ));
+
+        assert_eq!(expected, actual);
+        tmp_dir.close()
+    }
+
+    #[test]
+    #[ignore]
+    fn fish_path_directory_in_git_repo_truncate_to_repo_true() -> io::Result<()> {
+        let (tmp_dir, _) = make_known_tempdir(Path::new("/tmp"))?;
+        let repo_dir = tmp_dir.path().join("above-repo").join("rocket-controls");
+        let dir = repo_dir.join("src/meters/fuel-gauge");
+        fs::create_dir_all(&dir)?;
+        init_repo(&repo_dir).unwrap();
+
+        let actual = ModuleRenderer::new("directory")
+            .config(toml::toml! {
+                [directory]
+                // `truncate_to_repo = true` should display the truncated path
+                truncation_length = 5
+                truncate_to_repo = true
+                fish_style_pwd_dir_length = 1
+            })
+            .path(dir)
+            .collect();
+        let expected = Some(format!(
+            "{} ",
+            Color::Cyan.bold().paint(format!(
+                "{}/rocket-controls/src/meters/fuel-gauge",
+                to_fish_style(1, tmp_dir.path().join("above-repo").to_slash_lossy(), "")
+            ))
+        ));
+
+        assert_eq!(expected, actual);
+        tmp_dir.close()
+    }
+
+    #[test]
+    #[ignore]
+    fn directory_in_git_repo_truncate_to_repo_true() -> io::Result<()> {
+        let (tmp_dir, _) = make_known_tempdir(Path::new("/tmp"))?;
+        let repo_dir = tmp_dir.path().join("above-repo").join("rocket-controls");
+        let dir = repo_dir.join("src/meters/fuel-gauge");
+        fs::create_dir_all(&dir)?;
+        init_repo(&repo_dir).unwrap();
+
+        let actual = ModuleRenderer::new("directory")
+            .config(toml::toml! {
+                [directory]
+                // `truncate_to_repo = true` should display the truncated path
+                truncation_length = 5
+                truncate_to_repo = true
+            })
+            .path(dir)
+            .collect();
+        let expected = Some(format!(
+            "{} ",
+            Color::Cyan
+                .bold()
+                .paint("rocket-controls/src/meters/fuel-gauge")
+        ));
+
+        assert_eq!(expected, actual);
+        tmp_dir.close()
+    }
+
+    #[test]
+    #[ignore]
+    fn symlinked_git_repo_root() -> io::Result<()> {
+        let (tmp_dir, _) = make_known_tempdir(Path::new("/tmp"))?;
+        let repo_dir = tmp_dir.path().join("rocket-controls");
+        let symlink_dir = tmp_dir.path().join("rocket-controls-symlink");
+        fs::create_dir(&repo_dir)?;
+        init_repo(&repo_dir).unwrap();
+        symlink(&repo_dir, &symlink_dir)?;
+
+        let actual = ModuleRenderer::new("directory").path(symlink_dir).collect();
+        let expected = Some(format!(
+            "{} ",
+            Color::Cyan.bold().paint("rocket-controls-symlink")
+        ));
+
+        assert_eq!(expected, actual);
+        tmp_dir.close()
+    }
+
+    #[test]
+    #[ignore]
+    fn directory_in_symlinked_git_repo() -> io::Result<()> {
+        let (tmp_dir, _) = make_known_tempdir(Path::new("/tmp"))?;
+        let repo_dir = tmp_dir.path().join("rocket-controls");
+        let src_dir = repo_dir.join("src");
+        let symlink_dir = tmp_dir.path().join("rocket-controls-symlink");
+        let symlink_src_dir = symlink_dir.join("src");
+        fs::create_dir_all(&src_dir)?;
+        init_repo(&repo_dir).unwrap();
+        symlink(&repo_dir, &symlink_dir)?;
+
+        let actual = ModuleRenderer::new("directory")
+            .path(symlink_src_dir)
+            .collect();
+        let expected = Some(format!(
+            "{} ",
+            Color::Cyan.bold().paint("rocket-controls-symlink/src")
+        ));
+
+        assert_eq!(expected, actual);
+        tmp_dir.close()
+    }
+
+    #[test]
+    #[ignore]
+    fn truncated_directory_in_symlinked_git_repo() -> io::Result<()> {
+        let (tmp_dir, _) = make_known_tempdir(Path::new("/tmp"))?;
+        let repo_dir = tmp_dir.path().join("rocket-controls");
+        let src_dir = repo_dir.join("src/meters/fuel-gauge");
+        let symlink_dir = tmp_dir.path().join("rocket-controls-symlink");
+        let symlink_src_dir = symlink_dir.join("src/meters/fuel-gauge");
+        fs::create_dir_all(&src_dir)?;
+        init_repo(&repo_dir).unwrap();
+        symlink(&repo_dir, &symlink_dir)?;
+
+        let actual = ModuleRenderer::new("directory")
+            .path(symlink_src_dir)
+            .collect();
+        let expected = Some(format!(
+            "{} ",
+            Color::Cyan.bold().paint("src/meters/fuel-gauge")
+        ));
+
+        assert_eq!(expected, actual);
+        tmp_dir.close()
+    }
+
+    #[test]
+    #[ignore]
+    fn directory_in_symlinked_git_repo_truncate_to_repo_false() -> io::Result<()> {
+        let (tmp_dir, _) = make_known_tempdir(Path::new("/tmp"))?;
+        let repo_dir = tmp_dir.path().join("above-repo").join("rocket-controls");
+        let src_dir = repo_dir.join("src/meters/fuel-gauge");
+        let symlink_dir = tmp_dir
+            .path()
+            .join("above-repo")
+            .join("rocket-controls-symlink");
+        let symlink_src_dir = symlink_dir.join("src/meters/fuel-gauge");
+        fs::create_dir_all(&src_dir)?;
+        init_repo(&repo_dir).unwrap();
+        symlink(&repo_dir, &symlink_dir)?;
+
+        let actual = ModuleRenderer::new("directory")
+            .config(toml::toml! {
+                [directory]
+                // Don't truncate the path at all.
+                truncation_length = 5
+                truncate_to_repo = false
+            })
+            .path(symlink_src_dir)
+            .collect();
+        let expected = Some(format!(
+            "{} ",
+            Color::Cyan
+                .bold()
+                .paint("above-repo/rocket-controls-symlink/src/meters/fuel-gauge")
+        ));
+
+        assert_eq!(expected, actual);
+        tmp_dir.close()
+    }
+
+    #[test]
+    #[ignore]
+    fn fish_path_directory_in_symlinked_git_repo_truncate_to_repo_false() -> io::Result<()> {
+        let (tmp_dir, _) = make_known_tempdir(Path::new("/tmp"))?;
+        let repo_dir = tmp_dir.path().join("above-repo").join("rocket-controls");
+        let src_dir = repo_dir.join("src/meters/fuel-gauge");
+        let symlink_dir = tmp_dir
+            .path()
+            .join("above-repo")
+            .join("rocket-controls-symlink");
+        let symlink_src_dir = symlink_dir.join("src/meters/fuel-gauge");
+        fs::create_dir_all(&src_dir)?;
+        init_repo(&repo_dir).unwrap();
+        symlink(&repo_dir, &symlink_dir)?;
+
+        let actual = ModuleRenderer::new("directory")
+            .config(toml::toml! {
+                [directory]
+                // Don't truncate the path at all.
+                truncation_length = 5
+                truncate_to_repo = false
+                fish_style_pwd_dir_length = 1
+            })
+            .path(symlink_src_dir)
+            .collect();
+        let expected = Some(format!(
+            "{} ",
+            Color::Cyan.bold().paint(format!(
+                "{}/above-repo/rocket-controls-symlink/src/meters/fuel-gauge",
+                to_fish_style(1, tmp_dir.path().to_slash_lossy(), "")
+            ))
+        ));
+
+        assert_eq!(expected, actual);
+        tmp_dir.close()
+    }
+
+    #[test]
+    #[ignore]
+    fn fish_path_directory_in_symlinked_git_repo_truncate_to_repo_true() -> io::Result<()> {
+        let (tmp_dir, _) = make_known_tempdir(Path::new("/tmp"))?;
+        let repo_dir = tmp_dir.path().join("above-repo").join("rocket-controls");
+        let src_dir = repo_dir.join("src/meters/fuel-gauge");
+        let symlink_dir = tmp_dir
+            .path()
+            .join("above-repo")
+            .join("rocket-controls-symlink");
+        let symlink_src_dir = symlink_dir.join("src/meters/fuel-gauge");
+        fs::create_dir_all(&src_dir)?;
+        init_repo(&repo_dir).unwrap();
+        symlink(&repo_dir, &symlink_dir)?;
+
+        let actual = ModuleRenderer::new("directory")
+            .config(toml::toml! {
+                [directory]
+                // `truncate_to_repo = true` should display the truncated path
+                truncation_length = 5
+                truncate_to_repo = true
+                fish_style_pwd_dir_length = 1
+            })
+            .path(symlink_src_dir)
+            .collect();
+        let expected = Some(format!(
+            "{} ",
+            Color::Cyan.bold().paint(format!(
+                "{}/rocket-controls-symlink/src/meters/fuel-gauge",
+                to_fish_style(1, tmp_dir.path().join("above-repo").to_slash_lossy(), "")
+            ))
+        ));
+
+        assert_eq!(expected, actual);
+        tmp_dir.close()
+    }
+
+    #[test]
+    #[ignore]
+    fn directory_in_symlinked_git_repo_truncate_to_repo_true() -> io::Result<()> {
+        let (tmp_dir, _) = make_known_tempdir(Path::new("/tmp"))?;
+        let repo_dir = tmp_dir.path().join("above-repo").join("rocket-controls");
+        let src_dir = repo_dir.join("src/meters/fuel-gauge");
+        let symlink_dir = tmp_dir
+            .path()
+            .join("above-repo")
+            .join("rocket-controls-symlink");
+        let symlink_src_dir = symlink_dir.join("src/meters/fuel-gauge");
+        fs::create_dir_all(&src_dir)?;
+        init_repo(&repo_dir).unwrap();
+        symlink(&repo_dir, &symlink_dir)?;
+
+        let actual = ModuleRenderer::new("directory")
+            .config(toml::toml! {
+                [directory]
+                // `truncate_to_repo = true` should display the truncated path
+                truncation_length = 5
+                truncate_to_repo = true
+            })
+            .path(symlink_src_dir)
+            .collect();
+        let expected = Some(format!(
+            "{} ",
+            Color::Cyan
+                .bold()
+                .paint("rocket-controls-symlink/src/meters/fuel-gauge")
+        ));
+
+        assert_eq!(expected, actual);
+        tmp_dir.close()
+    }
+
+    #[test]
+    #[ignore]
+    fn symlinked_directory_in_git_repo() -> io::Result<()> {
+        let (tmp_dir, _) = make_known_tempdir(Path::new("/tmp"))?;
+        let repo_dir = tmp_dir.path().join("rocket-controls");
+        let dir = repo_dir.join("src");
+        fs::create_dir_all(&dir)?;
+        init_repo(&repo_dir).unwrap();
+        symlink(&dir, repo_dir.join("src/loop"))?;
+
+        let actual = ModuleRenderer::new("directory")
+            .config(toml::toml! {
+                [directory]
+                // `truncate_to_repo = true` should display the truncated path
+                truncation_length = 5
+                truncate_to_repo = true
+            })
+            .path(repo_dir.join("src/loop/loop"))
+            .collect();
+        let expected = Some(format!(
+            "{} ",
+            Color::Cyan.bold().paint("rocket-controls/src/loop/loop")
+        ));
+
+        assert_eq!(expected, actual);
+        tmp_dir.close()
+    }
 }

src/modules/docker_context.rs

@@ -1,4 +1,3 @@
-use std::env;
 use std::path::PathBuf;
 
 use super::{Context, Module, RootModuleConfig};
@@ -27,7 +26,8 @@ pub fn module<'a>(context: &'a Context) -> Option<Module<'a>> {
         return None;
     }
     let docker_config = PathBuf::from(
-        &env::var_os("DOCKER_CONFIG")
+        &context
+            .get_env_os("DOCKER_CONFIG")
             .unwrap_or(dirs_next::home_dir()?.join(".docker").into_os_string()),
     )
     .join("config.json");

src/modules/dotnet.rs

@@ -3,7 +3,7 @@ use quick_xml::Reader;
 use std::ffi::OsStr;
 use std::iter::Iterator;
 use std::ops::Deref;
-use std::path::Path;
+use std::path::{Path, PathBuf};
 use std::str;
 
 use super::{Context, Module, RootModuleConfig};
@@ -89,12 +89,12 @@ pub fn module<'a>(context: &'a Context) -> Option<Module<'a>> {
     Some(module)
 }
 
-fn find_current_tfm<'a>(files: &[DotNetFile<'a>]) -> Option<String> {
+fn find_current_tfm(files: &[DotNetFile]) -> Option<String> {
     let get_file_of_type = |t: FileType| files.iter().find(|f| f.file_type == t);
 
     let relevant_file = get_file_of_type(FileType::ProjectFile)?;
 
-    get_tfm_from_project_file(relevant_file.path)
+    get_tfm_from_project_file(relevant_file.path.as_path())
 }
 
 fn get_tfm_from_project_file(path: &Path) -> Option<String> {
@@ -135,8 +135,8 @@ fn get_tfm_from_project_file(path: &Path) -> Option<String> {
     None
 }
 
-fn estimate_dotnet_version<'a>(
-    files: &[DotNetFile<'a>],
+fn estimate_dotnet_version(
+    files: &[DotNetFile],
     current_dir: &Path,
     repo_root: Option<&Path>,
 ) -> Option<Version> {
@@ -149,9 +149,8 @@ fn estimate_dotnet_version<'a>(
         .or_else(|| files.iter().next())?;
 
     match relevant_file.file_type {
-        FileType::GlobalJson => {
-            get_pinned_sdk_version_from_file(relevant_file.path).or_else(get_latest_sdk_from_cli)
-        }
+        FileType::GlobalJson => get_pinned_sdk_version_from_file(relevant_file.path.as_path())
+            .or_else(get_latest_sdk_from_cli),
         FileType::SolutionFile => {
             // With this heuristic, we'll assume that a "global.json" won't
             // be found in any directory above the solution file.
@@ -251,13 +250,13 @@ fn get_pinned_sdk_version(json: &str) -> Option<Version> {
     }
 }
 
-fn get_local_dotnet_files<'a>(context: &'a Context) -> Result<Vec<DotNetFile<'a>>, std::io::Error> {
+fn get_local_dotnet_files<'a>(context: &'a Context) -> Result<Vec<DotNetFile>, std::io::Error> {
     Ok(context
         .dir_contents()?
         .files()
         .filter_map(|p| {
             get_dotnet_file_type(p).map(|t| DotNetFile {
-                path: p.as_ref(),
+                path: context.current_dir.join(p),
                 file_type: t,
             })
         })
@@ -331,8 +330,8 @@ fn get_latest_sdk_from_cli() -> Option<Version> {
     }
 }
 
-struct DotNetFile<'a> {
-    path: &'a Path,
+struct DotNetFile {
+    path: PathBuf,
     file_type: FileType,
 }
 
@@ -354,9 +353,266 @@ impl Deref for Version {
     }
 }
 
-#[test]
-fn should_parse_version_from_global_json() {
-    let json_text = r#"
+#[cfg(test)]
+mod tests {
+    use super::*;
+    use crate::test::ModuleRenderer;
+    use ansi_term::Color;
+    use std::fs::{self, OpenOptions};
+    use std::io::{self, Write};
+    use std::process::Command;
+    use tempfile::{self, TempDir};
+
+    #[test]
+    fn shows_nothing_in_directory_with_zero_relevant_files() -> io::Result<()> {
+        let workspace = create_workspace(false)?;
+        expect_output(&workspace.path(), None)?;
+        workspace.close()
+    }
+
+    #[test]
+    fn shows_latest_in_directory_with_directory_build_props_file() -> io::Result<()> {
+        let workspace = create_workspace(false)?;
+        touch_path(&workspace, "Directory.Build.props", None)?;
+        expect_output(
+            &workspace.path(),
+            Some(format!("{} ", Color::Blue.bold().paint("•NET v3.1.103"))),
+        )?;
+        workspace.close()
+    }
+
+    #[test]
+    fn shows_latest_in_directory_with_directory_build_targets_file() -> io::Result<()> {
+        let workspace = create_workspace(false)?;
+        touch_path(&workspace, "Directory.Build.targets", None)?;
+        expect_output(
+            &workspace.path(),
+            Some(format!("{} ", Color::Blue.bold().paint("•NET v3.1.103"))),
+        )?;
+        workspace.close()
+    }
+
+    #[test]
+    fn shows_latest_in_directory_with_packages_props_file() -> io::Result<()> {
+        let workspace = create_workspace(false)?;
+        touch_path(&workspace, "Packages.props", None)?;
+        expect_output(
+            &workspace.path(),
+            Some(format!("{} ", Color::Blue.bold().paint("•NET v3.1.103"))),
+        )?;
+        workspace.close()
+    }
+
+    #[test]
+    fn shows_latest_in_directory_with_solution() -> io::Result<()> {
+        let workspace = create_workspace(false)?;
+        touch_path(&workspace, "solution.sln", None)?;
+        expect_output(
+            &workspace.path(),
+            Some(format!("{} ", Color::Blue.bold().paint("•NET v3.1.103"))),
+        )?;
+        workspace.close()
+    }
+
+    #[test]
+    fn shows_latest_in_directory_with_csproj() -> io::Result<()> {
+        let workspace = create_workspace(false)?;
+        let csproj = make_csproj_with_tfm("TargetFramework", "netstandard2.0");
+        touch_path(&workspace, "project.csproj", Some(&csproj))?;
+        expect_output(
+            &workspace.path(),
+            Some(format!(
+                "{} ",
+                Color::Blue.bold().paint("•NET v3.1.103 🎯 netstandard2.0")
+            )),
+        )?;
+        workspace.close()
+    }
+
+    #[test]
+    fn shows_latest_in_directory_with_fsproj() -> io::Result<()> {
+        let workspace = create_workspace(false)?;
+        touch_path(&workspace, "project.fsproj", None)?;
+        expect_output(
+            &workspace.path(),
+            Some(format!("{} ", Color::Blue.bold().paint("•NET v3.1.103"))),
+        )?;
+        workspace.close()
+    }
+
+    #[test]
+    fn shows_latest_in_directory_with_xproj() -> io::Result<()> {
+        let workspace = create_workspace(false)?;
+        touch_path(&workspace, "project.xproj", None)?;
+        expect_output(
+            &workspace.path(),
+            Some(format!("{} ", Color::Blue.bold().paint("•NET v3.1.103"))),
+        )?;
+        workspace.close()
+    }
+
+    #[test]
+    fn shows_latest_in_directory_with_project_json() -> io::Result<()> {
+        let workspace = create_workspace(false)?;
+        touch_path(&workspace, "project.json", None)?;
+        expect_output(
+            &workspace.path(),
+            Some(format!("{} ", Color::Blue.bold().paint("•NET v3.1.103"))),
+        )?;
+        workspace.close()
+    }
+
+    #[test]
+    fn shows_pinned_in_directory_with_global_json() -> io::Result<()> {
+        let workspace = create_workspace(false)?;
+        let global_json = make_pinned_sdk_json("1.2.3");
+        touch_path(&workspace, "global.json", Some(&global_json))?;
+        expect_output(
+            &workspace.path(),
+            Some(format!("{} ", Color::Blue.bold().paint("•NET v1.2.3"))),
+        )?;
+        workspace.close()
+    }
+
+    #[test]
+    fn shows_pinned_in_project_below_root_with_global_json() -> io::Result<()> {
+        let workspace = create_workspace(false)?;
+        let global_json = make_pinned_sdk_json("1.2.3");
+        let csproj = make_csproj_with_tfm("TargetFramework", "netstandard2.0");
+        touch_path(&workspace, "global.json", Some(&global_json))?;
+        touch_path(&workspace, "project/project.csproj", Some(&csproj))?;
+        expect_output(
+            &workspace.path().join("project"),
+            Some(format!(
+                "{} ",
+                Color::Blue.bold().paint("•NET v1.2.3 🎯 netstandard2.0")
+            )),
+        )?;
+        workspace.close()
+    }
+
+    #[test]
+    fn shows_pinned_in_deeply_nested_project_within_repository() -> io::Result<()> {
+        let workspace = create_workspace(true)?;
+        let global_json = make_pinned_sdk_json("1.2.3");
+        let csproj = make_csproj_with_tfm("TargetFramework", "netstandard2.0");
+        touch_path(&workspace, "global.json", Some(&global_json))?;
+        touch_path(
+            &workspace,
+            "deep/path/to/project/project.csproj",
+            Some(&csproj),
+        )?;
+        expect_output(
+            &workspace.path().join("deep/path/to/project"),
+            Some(format!(
+                "{} ",
+                Color::Blue.bold().paint("•NET v1.2.3 🎯 netstandard2.0")
+            )),
+        )?;
+        workspace.close()
+    }
+
+    #[test]
+    fn shows_single_tfm() -> io::Result<()> {
+        let workspace = create_workspace(false)?;
+        let csproj = make_csproj_with_tfm("TargetFramework", "netstandard2.0");
+        touch_path(&workspace, "project.csproj", Some(&csproj))?;
+        expect_output(
+            workspace.path(),
+            Some(format!(
+                "{} ",
+                Color::Blue.bold().paint("•NET v3.1.103 🎯 netstandard2.0")
+            )),
+        )?;
+        workspace.close()
+    }
+
+    #[test]
+    fn shows_multiple_tfms() -> io::Result<()> {
+        let workspace = create_workspace(false)?;
+        let csproj = make_csproj_with_tfm("TargetFrameworks", "netstandard2.0;net461");
+        touch_path(&workspace, "project.csproj", Some(&csproj))?;
+        expect_output(
+            workspace.path(),
+            Some(format!(
+                "{} ",
+                Color::Blue
+                    .bold()
+                    .paint("•NET v3.1.103 🎯 netstandard2.0;net461")
+            )),
+        )?;
+        workspace.close()
+    }
+
+    fn create_workspace(is_repo: bool) -> io::Result<TempDir> {
+        let repo_dir = tempfile::tempdir()?;
+
+        if is_repo {
+            Command::new("git")
+                .args(&["init", "--quiet"])
+                .current_dir(repo_dir.path())
+                .output()?;
+        }
+
+        Ok(repo_dir)
+    }
+
+    fn touch_path(
+        workspace: &TempDir,
+        relative_path: &str,
+        contents: Option<&str>,
+    ) -> io::Result<()> {
+        let path = workspace.path().join(relative_path);
+
+        fs::create_dir_all(
+            path.parent()
+                .expect("Expected relative_path to be a file in a directory"),
+        )?;
+
+        let mut file = OpenOptions::new()
+            .write(true)
+            .create(true)
+            .truncate(true)
+            .open(&path)?;
+        write!(file, "{}", contents.unwrap_or(""))?;
+        file.sync_data()
+    }
+
+    fn make_pinned_sdk_json(version: &str) -> String {
+        let json_text = r#"
+        {
+            "sdk": {
+                "version": "INSERT_VERSION"
+            }
+        }
+    "#;
+        json_text.replace("INSERT_VERSION", version)
+    }
+
+    fn make_csproj_with_tfm(tfm_element: &str, tfm: &str) -> String {
+        let json_text = r#"
+        <Project>
+            <PropertyGroup>
+                <TFM_ELEMENT>TFM_VALUE</TFM_ELEMENT>
+            </PropertyGroup>
+        </Project>
+    "#;
+        json_text
+            .replace("TFM_ELEMENT", tfm_element)
+            .replace("TFM_VALUE", tfm)
+    }
+
+    fn expect_output(dir: &Path, expected: Option<String>) -> io::Result<()> {
+        let actual = ModuleRenderer::new("dotnet").path(dir).collect();
+
+        assert_eq!(actual, expected);
+
+        Ok(())
+    }
+
+    #[test]
+    fn should_parse_version_from_global_json() {
+        let json_text = r#"
         {
             "sdk": {
                 "version": "1.2.3"
@@ -364,14 +620,15 @@ fn should_parse_version_from_global_json() {
         }
     "#;
 
-    let version = get_pinned_sdk_version(json_text).unwrap();
-    assert_eq!("v1.2.3", version.0);
-}
+        let version = get_pinned_sdk_version(json_text).unwrap();
+        assert_eq!("v1.2.3", version.0);
+    }
 
-#[test]
-fn should_ignore_empty_global_json() {
-    let json_text = "{}";
+    #[test]
+    fn should_ignore_empty_global_json() {
+        let json_text = "{}";
 
-    let version = get_pinned_sdk_version(json_text);
-    assert!(version.is_none());
+        let version = get_pinned_sdk_version(json_text);
+        assert!(version.is_none());
+    }
 }

src/modules/elixir.rs

@@ -73,7 +73,7 @@ fn parse_elixir_version(version: &str) -> Option<(String, String)> {
 #[cfg(test)]
 mod tests {
     use super::*;
-    use crate::modules::utils::test::render_module;
+    use crate::test::ModuleRenderer;
     use ansi_term::Color;
     use std::fs::File;
     use std::io;
@@ -97,7 +97,7 @@ Elixir 1.10 (compiled with Erlang/OTP 22)
         let dir = tempfile::tempdir()?;
 
         let expected = None;
-        let output = render_module("elixir", dir.path(), None);
+        let output = ModuleRenderer::new("elixir").path(dir.path()).collect();
 
         assert_eq!(output, expected);
 
@@ -113,7 +113,7 @@ Elixir 1.10 (compiled with Erlang/OTP 22)
             "via {} ",
             Color::Purple.bold().paint("💧 1.10 (OTP 22)")
         ));
-        let output = render_module("elixir", dir.path(), None);
+        let output = ModuleRenderer::new("elixir").path(dir.path()).collect();
 
         assert_eq!(output, expected);
 

src/modules/elm.rs

@@ -60,7 +60,7 @@ pub fn module<'a>(context: &'a Context) -> Option<Module<'a>> {
 
 #[cfg(test)]
 mod tests {
-    use crate::modules::utils::test::render_module;
+    use crate::test::ModuleRenderer;
     use ansi_term::Color;
     use std::fs::{self, File};
     use std::io;
@@ -68,7 +68,7 @@ mod tests {
     #[test]
     fn folder_without_elm() -> io::Result<()> {
         let dir = tempfile::tempdir()?;
-        let actual = render_module("elm", dir.path(), None);
+        let actual = ModuleRenderer::new("elm").path(dir.path()).collect();
         let expected = None;
         assert_eq!(expected, actual);
         dir.close()
@@ -78,7 +78,7 @@ mod tests {
     fn folder_with_elm_json() -> io::Result<()> {
         let dir = tempfile::tempdir()?;
         File::create(dir.path().join("elm.json"))?.sync_all()?;
-        let actual = render_module("elm", dir.path(), None);
+        let actual = ModuleRenderer::new("elm").path(dir.path()).collect();
         let expected = Some(format!("via {} ", Color::Cyan.bold().paint("🌳 v0.19.1")));
         assert_eq!(expected, actual);
         dir.close()
@@ -88,7 +88,7 @@ mod tests {
     fn folder_with_elm_package_json() -> io::Result<()> {
         let dir = tempfile::tempdir()?;
         File::create(dir.path().join("elm-package.json"))?.sync_all()?;
-        let actual = render_module("elm", dir.path(), None);
+        let actual = ModuleRenderer::new("elm").path(dir.path()).collect();
         let expected = Some(format!("via {} ", Color::Cyan.bold().paint("🌳 v0.19.1")));
         assert_eq!(expected, actual);
         dir.close()
@@ -98,7 +98,7 @@ mod tests {
     fn folder_with_elm_version() -> io::Result<()> {
         let dir = tempfile::tempdir()?;
         File::create(dir.path().join(".elm-version"))?.sync_all()?;
-        let actual = render_module("elm", dir.path(), None);
+        let actual = ModuleRenderer::new("elm").path(dir.path()).collect();
         let expected = Some(format!("via {} ", Color::Cyan.bold().paint("🌳 v0.19.1")));
         assert_eq!(expected, actual);
         dir.close()
@@ -109,7 +109,7 @@ mod tests {
         let dir = tempfile::tempdir()?;
         let elmstuff = dir.path().join("elm-stuff");
         fs::create_dir_all(&elmstuff)?;
-        let actual = render_module("elm", dir.path(), None);
+        let actual = ModuleRenderer::new("elm").path(dir.path()).collect();
         let expected = Some(format!("via {} ", Color::Cyan.bold().paint("🌳 v0.19.1")));
         assert_eq!(expected, actual);
         dir.close()
@@ -119,7 +119,7 @@ mod tests {
     fn folder_with_elm_file() -> io::Result<()> {
         let dir = tempfile::tempdir()?;
         File::create(dir.path().join("main.elm"))?.sync_all()?;
-        let actual = render_module("elm", dir.path(), None);
+        let actual = ModuleRenderer::new("elm").path(dir.path()).collect();
         let expected = Some(format!("via {} ", Color::Cyan.bold().paint("🌳 v0.19.1")));
         assert_eq!(expected, actual);
         dir.close()

src/modules/env_var.rs

@@ -1,5 +1,3 @@
-use std::env;
-
 use super::{Context, Module};
 
 use crate::config::RootModuleConfig;
@@ -16,7 +14,7 @@ pub fn module<'a>(context: &'a Context) -> Option<Module<'a>> {
     let mut module = context.new_module("env_var");
     let config: EnvVarConfig = EnvVarConfig::try_load(module.config);
 
-    let env_value = get_env_value(config.variable?, config.default)?;
+    let env_value = get_env_value(context, config.variable?, config.default)?;
     let parsed = StringFormatter::new(config.format).and_then(|formatter| {
         formatter
             .map_meta(|var, _| match var {
@@ -45,12 +43,153 @@ pub fn module<'a>(context: &'a Context) -> Option<Module<'a>> {
     Some(module)
 }
 
-fn get_env_value(name: &str, default: Option<&str>) -> Option<String> {
-    match env::var_os(name) {
-        Some(os_value) => match os_value.into_string() {
-            Ok(value) => Some(value),
-            Err(_error) => None,
-        },
+fn get_env_value(context: &Context, name: &str, default: Option<&str>) -> Option<String> {
+    match context.get_env(name) {
+        Some(value) => Some(value),
         None => default.map(|value| value.to_owned()),
     }
 }
+
+#[cfg(test)]
+mod test {
+    use crate::test::ModuleRenderer;
+    use ansi_term::{Color, Style};
+    use std::io;
+
+    const TEST_VAR_VALUE: &str = "astronauts";
+
+    #[test]
+    fn empty_config() -> io::Result<()> {
+        let actual = ModuleRenderer::new("env_var")
+            .config(toml::toml! {
+                [env_var]
+            })
+            .collect();
+        let expected = None;
+
+        assert_eq!(expected, actual);
+        Ok(())
+    }
+
+    #[test]
+    fn defined_variable() -> io::Result<()> {
+        let actual = ModuleRenderer::new("env_var")
+            .config(toml::toml! {
+                [env_var]
+                variable = "TEST_VAR"
+            })
+            .env("TEST_VAR", TEST_VAR_VALUE)
+            .collect();
+        let expected = Some(format!("with {} ", style().paint(TEST_VAR_VALUE)));
+
+        assert_eq!(expected, actual);
+        Ok(())
+    }
+
+    #[test]
+    fn undefined_variable() -> io::Result<()> {
+        let actual = ModuleRenderer::new("env_var")
+            .config(toml::toml! {
+                [env_var]
+                variable = "TEST_VAR"
+            })
+            .collect();
+        let expected = None;
+
+        assert_eq!(expected, actual);
+        Ok(())
+    }
+
+    #[test]
+    fn default_has_no_effect() -> io::Result<()> {
+        let actual = ModuleRenderer::new("env_var")
+            .config(toml::toml! {
+                [env_var]
+                variable = "TEST_VAR"
+                default = "N/A"
+            })
+            .env("TEST_VAR", TEST_VAR_VALUE)
+            .collect();
+        let expected = Some(format!("with {} ", style().paint(TEST_VAR_VALUE)));
+
+        assert_eq!(expected, actual);
+        Ok(())
+    }
+
+    #[test]
+    fn default_takes_effect() -> io::Result<()> {
+        let actual = ModuleRenderer::new("env_var")
+            .config(toml::toml! {
+                [env_var]
+                variable = "UNDEFINED_TEST_VAR"
+                default = "N/A"
+            })
+            .collect();
+        let expected = Some(format!("with {} ", style().paint("N/A")));
+
+        assert_eq!(expected, actual);
+        Ok(())
+    }
+
+    #[test]
+    fn symbol() -> io::Result<()> {
+        let actual = ModuleRenderer::new("env_var")
+            .config(toml::toml! {
+                [env_var]
+                variable = "TEST_VAR"
+                format = "with [■ $env_value](black bold dimmed) "
+            })
+            .env("TEST_VAR", TEST_VAR_VALUE)
+            .collect();
+        let expected = Some(format!(
+            "with {} ",
+            style().paint(format!("■ {}", TEST_VAR_VALUE))
+        ));
+
+        assert_eq!(expected, actual);
+        Ok(())
+    }
+
+    #[test]
+    fn prefix() -> io::Result<()> {
+        let actual = ModuleRenderer::new("env_var")
+            .config(toml::toml! {
+                [env_var]
+                variable = "TEST_VAR"
+                format = "with [_$env_value](black bold dimmed) "
+            })
+            .env("TEST_VAR", TEST_VAR_VALUE)
+            .collect();
+        let expected = Some(format!(
+            "with {} ",
+            style().paint(format!("_{}", TEST_VAR_VALUE))
+        ));
+
+        assert_eq!(expected, actual);
+        Ok(())
+    }
+
+    #[test]
+    fn suffix() -> io::Result<()> {
+        let actual = ModuleRenderer::new("env_var")
+            .config(toml::toml! {
+                [env_var]
+                variable = "TEST_VAR"
+                format = "with [${env_value}_](black bold dimmed) "
+            })
+            .env("TEST_VAR", TEST_VAR_VALUE)
+            .collect();
+        let expected = Some(format!(
+            "with {} ",
+            style().paint(format!("{}_", TEST_VAR_VALUE))
+        ));
+
+        assert_eq!(expected, actual);
+        Ok(())
+    }
+
+    fn style() -> Style {
+        // default style
+        Color::Black.bold().dimmed()
+    }
+}

src/modules/erlang.rs

@@ -67,7 +67,7 @@ fn get_erlang_version() -> Option<String> {
 
 #[cfg(test)]
 mod tests {
-    use crate::modules::utils::test::render_module;
+    use crate::test::ModuleRenderer;
     use ansi_term::Color;
     use std::fs::File;
     use std::io;
@@ -77,7 +77,7 @@ mod tests {
         let dir = tempfile::tempdir()?;
 
         let expected = None;
-        let output = render_module("erlang", dir.path(), None);
+        let output = ModuleRenderer::new("erlang").path(dir.path()).collect();
 
         assert_eq!(output, expected);
 
@@ -90,7 +90,7 @@ mod tests {
         File::create(dir.path().join("rebar.config"))?.sync_all()?;
 
         let expected = Some(format!("via {} ", Color::Red.bold().paint("🖧 22.1.3")));
-        let output = render_module("erlang", dir.path(), None);
+        let output = ModuleRenderer::new("erlang").path(dir.path()).collect();
 
         assert_eq!(output, expected);
 

src/modules/gcloud.rs

@@ -1,5 +1,4 @@
 use std::collections::HashMap;
-use std::env;
 use std::fs::File;
 use std::io::{BufRead, BufReader, Error, ErrorKind};
 use std::path::PathBuf;
@@ -68,16 +67,16 @@ fn get_active_config(config_root: &PathBuf) -> Option<String> {
     }
 }
 
-fn get_current_config_path() -> Option<PathBuf> {
-    let config_dir = get_config_dir()?;
+fn get_current_config_path(context: &Context) -> Option<PathBuf> {
+    let config_dir = get_config_dir(context)?;
     let active_config = get_active_config(&config_dir)?;
     let current_config = config_dir.join(format!("configurations/config_{}", active_config));
     Some(current_config)
 }
 
-fn get_config_dir() -> Option<PathBuf> {
-    let config_dir = env::var("CLOUDSDK_CONFIG")
-        .ok()
+fn get_config_dir(context: &Context) -> Option<PathBuf> {
+    let config_dir = context
+        .get_env("CLOUDSDK_CONFIG")
         .and_then(|path| PathBuf::from_str(&path).ok())
         .or_else(|| {
             let mut home = dirs_next::home_dir()?;
@@ -98,11 +97,11 @@ pub fn module<'a>(context: &'a Context) -> Option<Module<'a>> {
     let mut module = context.new_module("gcloud");
     let config: GcloudConfig = GcloudConfig::try_load(module.config);
 
-    let config_path = get_current_config_path()?;
+    let config_path = get_current_config_path(context)?;
     let gcloud_account = get_gcloud_account_from_config(&config_path);
     let gcloud_project = get_gcloud_project_from_config(&config_path);
     let gcloud_region = get_gcloud_region_from_config(&config_path);
-    let config_dir = get_config_dir()?;
+    let config_dir = get_config_dir(context)?;
     let gcloud_active: Option<Active> = get_active_config(&config_dir);
 
     if gcloud_account.is_none()
@@ -149,3 +148,172 @@ pub fn module<'a>(context: &'a Context) -> Option<Module<'a>> {
 
     Some(module)
 }
+
+#[cfg(test)]
+mod tests {
+    use std::fs::{create_dir, File};
+    use std::io::{self, Write};
+
+    use ansi_term::Color;
+
+    use crate::test::ModuleRenderer;
+
+    #[test]
+    fn account_set() -> io::Result<()> {
+        let dir = tempfile::tempdir()?;
+        let active_config_path = dir.path().join("active_config");
+        let mut active_config_file = File::create(&active_config_path)?;
+        active_config_file.write_all(b"default")?;
+
+        create_dir(dir.path().join("configurations"))?;
+        let config_default_path = dir.path().join("configurations/config_default");
+        let mut config_default_file = File::create(&config_default_path)?;
+        config_default_file.write_all(
+            b"[core]
+account = foo@example.com
+",
+        )?;
+
+        let actual = ModuleRenderer::new("gcloud")
+            .env("CLOUDSDK_CONFIG", dir.path().to_string_lossy())
+            .collect();
+        let expected = Some(format!(
+            "on {} ",
+            Color::Blue.bold().paint("☁️ foo@example.com")
+        ));
+
+        assert_eq!(actual, expected);
+        dir.close()
+    }
+
+    #[test]
+    fn account_and_region_set() -> io::Result<()> {
+        let dir = tempfile::tempdir()?;
+        let active_config_path = dir.path().join("active_config");
+        let mut active_config_file = File::create(&active_config_path)?;
+        active_config_file.write_all(b"default")?;
+
+        create_dir(dir.path().join("configurations"))?;
+        let config_default_path = dir.path().join("configurations/config_default");
+        let mut config_default_file = File::create(&config_default_path)?;
+        config_default_file.write_all(
+            b"[core]
+account = foo@example.com
+
+[compute]
+region = us-central1
+",
+        )?;
+
+        let actual = ModuleRenderer::new("gcloud")
+            .env("CLOUDSDK_CONFIG", dir.path().to_string_lossy())
+            .collect();
+        let expected = Some(format!(
+            "on {} ",
+            Color::Blue.bold().paint("☁️ foo@example.com(us-central1)")
+        ));
+
+        assert_eq!(actual, expected);
+        dir.close()
+    }
+
+    #[test]
+    fn account_and_region_set_with_alias() -> io::Result<()> {
+        let dir = tempfile::tempdir()?;
+        let active_config_path = dir.path().join("active_config");
+        let mut active_config_file = File::create(&active_config_path)?;
+        active_config_file.write_all(b"default")?;
+
+        create_dir(dir.path().join("configurations"))?;
+        let config_default_path = dir.path().join("configurations/config_default");
+        let mut config_default_file = File::create(&config_default_path)?;
+        config_default_file.write_all(
+            b"[core]
+account = foo@example.com
+
+[compute]
+region = us-central1
+",
+        )?;
+
+        let actual = ModuleRenderer::new("gcloud")
+            .env("CLOUDSDK_CONFIG", dir.path().to_string_lossy())
+            .config(toml::toml! {
+                [gcloud.region_aliases]
+                us-central1 = "uc1"
+            })
+            .collect();
+        let expected = Some(format!(
+            "on {} ",
+            Color::Blue.bold().paint("☁️ foo@example.com(uc1)")
+        ));
+
+        assert_eq!(actual, expected);
+        dir.close()
+    }
+
+    #[test]
+    fn active_set() -> io::Result<()> {
+        let dir = tempfile::tempdir()?;
+        let active_config_path = dir.path().join("active_config");
+        let mut active_config_file = File::create(&active_config_path)?;
+        active_config_file.write_all(b"default1")?;
+
+        let actual = ModuleRenderer::new("gcloud")
+            .env("CLOUDSDK_CONFIG", dir.path().to_string_lossy())
+            .config(toml::toml! {
+                [gcloud]
+                format = "on [$symbol$active]($style) "
+            })
+            .collect();
+        let expected = Some(format!("on {} ", Color::Blue.bold().paint("☁️ default1")));
+
+        assert_eq!(actual, expected);
+        dir.close()
+    }
+
+    #[test]
+    fn project_set() -> io::Result<()> {
+        let dir = tempfile::tempdir()?;
+        let active_config_path = dir.path().join("active_config");
+        let mut active_config_file = File::create(&active_config_path)?;
+        active_config_file.write_all(b"default")?;
+
+        create_dir(dir.path().join("configurations"))?;
+        let config_default_path = dir.path().join("configurations/config_default");
+        let mut config_default_file = File::create(&config_default_path)?;
+        config_default_file.write_all(
+            b"[core]
+project = abc
+",
+        )?;
+
+        let actual = ModuleRenderer::new("gcloud")
+            .env("CLOUDSDK_CONFIG", dir.path().to_string_lossy())
+            .config(toml::toml! {
+                [gcloud]
+                format = "on [$symbol$project]($style) "
+            })
+            .collect();
+        let expected = Some(format!("on {} ", Color::Blue.bold().paint("☁️ abc")));
+
+        assert_eq!(actual, expected);
+        dir.close()
+    }
+
+    #[test]
+    fn region_not_set_with_display_region() -> io::Result<()> {
+        let dir = tempfile::tempdir()?;
+        let actual = ModuleRenderer::new("gcloud")
+            .env("CLOUDSDK_CONFIG", dir.path().to_string_lossy())
+            .config(toml::toml! {
+                [gcloud]
+                format = "on [$symbol$region]($style) "
+            })
+            .collect();
+        let expected = None;
+
+        assert_eq!(expected, actual);
+        dir.close()
+    }
+}

src/modules/git_branch.rs

@@ -29,7 +29,7 @@ pub fn module<'a>(context: &'a Context) -> Option<Module<'a>> {
     let repo = context.get_repo().ok()?;
     let branch_name = repo.branch.as_ref()?;
 
-    let mut graphemes = get_graphemes(&branch_name);
+    let mut graphemes: Vec<&str> = branch_name.graphemes(true).collect();
     let trunc_len = len.min(graphemes.len());
 
     if trunc_len < graphemes.len() {
@@ -72,6 +72,295 @@ fn get_first_grapheme(text: &str) -> &str {
         .unwrap_or("")
 }
 
-fn get_graphemes(text: &str) -> Vec<&str> {
-    UnicodeSegmentation::graphemes(text, true).collect()
+#[cfg(test)]
+mod tests {
+    use ansi_term::Color;
+    use std::io;
+    use std::process::Command;
+
+    use crate::test::{fixture_repo, FixtureProvider, ModuleRenderer};
+
+    #[test]
+    fn show_nothing_on_empty_dir() -> io::Result<()> {
+        let repo_dir = tempfile::tempdir()?;
+
+        let actual = ModuleRenderer::new("git_branch")
+            .path(repo_dir.path())
+            .collect();
+        let expected = None;
+
+        assert_eq!(expected, actual);
+        repo_dir.close()
+    }
+
+    #[test]
+    fn test_changed_truncation_symbol() -> io::Result<()> {
+        test_truncate_length_with_config(
+            "1337_hello_world",
+            15,
+            "1337_hello_worl",
+            "%",
+            "truncation_symbol = \"%\"",
+        )
+    }
+
+    #[test]
+    fn test_no_truncation_symbol() -> io::Result<()> {
+        test_truncate_length_with_config(
+            "1337_hello_world",
+            15,
+            "1337_hello_worl",
+            "",
+            "truncation_symbol = \"\"",
+        )
+    }
+
+    #[test]
+    fn test_multi_char_truncation_symbol() -> io::Result<()> {
+        test_truncate_length_with_config(
+            "1337_hello_world",
+            15,
+            "1337_hello_worl",
+            "a",
+            "truncation_symbol = \"apple\"",
+        )
+    }
+
+    #[test]
+    fn test_ascii_boundary_below() -> io::Result<()> {
+        test_truncate_length("1337_hello_world", 15, "1337_hello_worl", "…")
+    }
+
+    #[test]
+    fn test_ascii_boundary_on() -> io::Result<()> {
+        test_truncate_length("1337_hello_world", 16, "1337_hello_world", "")
+    }
+
+    #[test]
+    fn test_ascii_boundary_above() -> io::Result<()> {
+        test_truncate_length("1337_hello_world", 17, "1337_hello_world", "")
+    }
+
+    #[test]
+    fn test_one() -> io::Result<()> {
+        test_truncate_length("1337_hello_world", 1, "1", "…")
+    }
+
+    #[test]
+    fn test_zero() -> io::Result<()> {
+        test_truncate_length("1337_hello_world", 0, "1337_hello_world", "")
+    }
+
+    #[test]
+    fn test_negative() -> io::Result<()> {
+        test_truncate_length("1337_hello_world", -1, "1337_hello_world", "")
+    }
+
+    #[test]
+    fn test_hindi_truncation() -> io::Result<()> {
+        test_truncate_length("नमस्ते", 3, "नमस्", "…")
+    }
+
+    #[test]
+    fn test_hindi_truncation2() -> io::Result<()> {
+        test_truncate_length("नमस्त", 3, "नमस्", "…")
+    }
+
+    #[test]
+    fn test_japanese_truncation() -> io::Result<()> {
+        test_truncate_length("がんばってね", 4, "がんばっ", "…")
+    }
+
+    #[test]
+    fn test_format_no_branch() -> io::Result<()> {
+        test_format("1337_hello_world", "no_branch", "", "no_branch")
+    }
+
+    #[test]
+    fn test_format_just_branch_name() -> io::Result<()> {
+        test_format("1337_hello_world", "$branch", "", "1337_hello_world")
+    }
+
+    #[test]
+    fn test_format_just_branch_name_color() -> io::Result<()> {
+        test_format(
+            "1337_hello_world",
+            "[$branch](bold blue)",
+            "",
+            Color::Blue.bold().paint("1337_hello_world").to_string(),
+        )
+    }
+
+    #[test]
+    fn test_format_mixed_colors() -> io::Result<()> {
+        test_format(
+            "1337_hello_world",
+            "branch: [$branch](bold blue) [THE COLORS](red) ",
+            "",
+            format!(
+                "branch: {} {} ",
+                Color::Blue.bold().paint("1337_hello_world").to_string(),
+                Color::Red.paint("THE COLORS").to_string()
+            ),
+        )
+    }
+
+    #[test]
+    fn test_format_symbol_style() -> io::Result<()> {
+        test_format(
+            "1337_hello_world",
+            "$symbol[$branch]($style)",
+            r#"
+            symbol = "git: "
+            style = "green"
+        "#,
+            format!(
+                "git: {}",
+                Color::Green.paint("1337_hello_world").to_string(),
+            ),
+        )
+    }
+
+    #[test]
+    fn test_works_with_unborn_default_branch() -> io::Result<()> {
+        let repo_dir = tempfile::tempdir()?;
+
+        Command::new("git")
+            .args(&["init"])
+            .current_dir(&repo_dir)
+            .output()?;
+
+        Command::new("git")
+            .args(&["symbolic-ref", "HEAD", "refs/heads/main"])
+            .current_dir(&repo_dir)
+            .output()?;
+
+        let actual = ModuleRenderer::new("git_branch")
+            .path(&repo_dir.path())
+            .collect();
+
+        let expected = Some(format!(
+            "on {} ",
+            Color::Purple.bold().paint(format!("\u{e0a0} {}", "main")),
+        ));
+
+        assert_eq!(expected, actual);
+        repo_dir.close()
+    }
+
+    // This test is not possible until we switch to `git status --porcelain`
+    // where we can mock the env for the specific git process. This is because
+    // git2 does not care about our mocking and when we set the real `GIT_DIR`
+    // variable it will interfere with the other tests.
+    // #[test]
+    // fn test_git_dir_env_variable() -> io::Result<()> {let repo_dir =
+    // tempfile::tempdir()?;
+
+    //     Command::new("git")
+    //         .args(&["init"])
+    //         .current_dir(&repo_dir)
+    //         .output()?;
+
+    //     // git2 does not care about our mocking
+    //     std::env::set_var("GIT_DIR", repo_dir.path().join(".git"));
+
+    //     let actual = ModuleRenderer::new("git_branch").collect();
+
+    //     std::env::remove_var("GIT_DIR");
+
+    //     let expected = Some(format!(
+    //         "on {} ",
+    //         Color::Purple.bold().paint(format!("\u{e0a0} {}", "master")),
+    //     ));
+
+    //     assert_eq!(expected, actual);
+    //     repo_dir.close()
+    // }
+
+    fn test_truncate_length(
+        branch_name: &str,
+        truncate_length: i64,
+        expected_name: &str,
+        truncation_symbol: &str,
+    ) -> io::Result<()> {
+        test_truncate_length_with_config(
+            branch_name,
+            truncate_length,
+            expected_name,
+            truncation_symbol,
+            "",
+        )
+    }
+
+    fn test_truncate_length_with_config(
+        branch_name: &str,
+        truncate_length: i64,
+        expected_name: &str,
+        truncation_symbol: &str,
+        config_options: &str,
+    ) -> io::Result<()> {
+        let repo_dir = fixture_repo(FixtureProvider::GIT)?;
+
+        Command::new("git")
+            .args(&["checkout", "-b", branch_name])
+            .current_dir(repo_dir.path())
+            .output()?;
+
+        let actual = ModuleRenderer::new("git_branch")
+            .config(
+                toml::from_str(&format!(
+                    "
+                    [git_branch]
+                        truncation_length = {}
+                        {}
+                ",
+                    truncate_length, config_options
+                ))
+                .unwrap(),
+            )
+            .path(repo_dir.path())
+            .collect();
+
+        let expected = Some(format!(
+            "on {} ",
+            Color::Purple
+                .bold()
+                .paint(format!("\u{e0a0} {}{}", expected_name, truncation_symbol)),
+        ));
+
+        assert_eq!(expected, actual);
+        repo_dir.close()
+    }
+
+    fn test_format<T: Into<String>>(
+        branch_name: &str,
+        format: &str,
+        config_options: &str,
+        expected: T,
+    ) -> io::Result<()> {
+        let repo_dir = fixture_repo(FixtureProvider::GIT)?;
+
+        Command::new("git")
+            .args(&["checkout", "-b", branch_name])
+            .current_dir(repo_dir.path())
+            .output()?;
+
+        let actual = ModuleRenderer::new("git_branch")
+            .config(
+                toml::from_str(&format!(
+                    r#"
+                    [git_branch]
+                        format = "{}"
+                        {}
+                "#,
+                    format, config_options
+                ))
+                .unwrap(),
+            )
+            .path(repo_dir.path())
+            .collect();
+
+        assert_eq!(Some(expected.into()), actual);
+        repo_dir.close()
+    }
 }

src/modules/git_commit.rs

@@ -62,3 +62,138 @@ pub fn id_to_hex_abbrev(bytes: &[u8], len: usize) -> String {
         .take(len)
         .collect()
 }
+
+#[cfg(test)]
+mod tests {
+    use ansi_term::Color;
+    use std::process::Command;
+    use std::{io, str};
+
+    use crate::test::{fixture_repo, FixtureProvider, ModuleRenderer};
+
+    #[test]
+    fn show_nothing_on_empty_dir() -> io::Result<()> {
+        let repo_dir = tempfile::tempdir()?;
+
+        let actual = ModuleRenderer::new("git_commit")
+            .path(&repo_dir.path())
+            .collect();
+
+        let expected = None;
+
+        assert_eq!(expected, actual);
+        repo_dir.close()
+    }
+
+    #[test]
+    fn test_render_commit_hash() -> io::Result<()> {
+        let repo_dir = fixture_repo(FixtureProvider::GIT)?;
+
+        let mut git_output = Command::new("git")
+            .args(&["rev-parse", "HEAD"])
+            .current_dir(&repo_dir.path())
+            .output()?
+            .stdout;
+        git_output.truncate(7);
+        let expected_hash = str::from_utf8(&git_output).unwrap();
+
+        let actual = ModuleRenderer::new("git_commit")
+            .config(toml::toml! {
+                [git_commit]
+                    only_detached = false
+            })
+            .path(&repo_dir.path())
+            .collect();
+
+        let expected = Some(format!(
+            "{} ",
+            Color::Green
+                .bold()
+                .paint(format!("({})", expected_hash))
+                .to_string()
+        ));
+
+        assert_eq!(expected, actual);
+        repo_dir.close()
+    }
+
+    #[test]
+    fn test_render_commit_hash_len_override() -> io::Result<()> {
+        let repo_dir = fixture_repo(FixtureProvider::GIT)?;
+
+        let mut git_output = Command::new("git")
+            .args(&["rev-parse", "HEAD"])
+            .current_dir(&repo_dir.path())
+            .output()?
+            .stdout;
+        git_output.truncate(14);
+        let expected_hash = str::from_utf8(&git_output).unwrap();
+
+        let actual = ModuleRenderer::new("git_commit")
+            .config(toml::toml! {
+                [git_commit]
+                    only_detached = false
+                    commit_hash_length = 14
+            })
+            .path(&repo_dir.path())
+            .collect();
+
+        let expected = Some(format!(
+            "{} ",
+            Color::Green
+                .bold()
+                .paint(format!("({})", expected_hash))
+                .to_string()
+        ));
+
+        assert_eq!(expected, actual);
+        repo_dir.close()
+    }
+
+    #[test]
+    fn test_render_commit_hash_only_detached_on_branch() -> io::Result<()> {
+        let repo_dir = fixture_repo(FixtureProvider::GIT)?;
+
+        let actual = ModuleRenderer::new("git_commit")
+            .path(&repo_dir.path())
+            .collect();
+
+        let expected = None;
+
+        assert_eq!(expected, actual);
+        repo_dir.close()
+    }
+
+    #[test]
+    fn test_render_commit_hash_only_detached_on_detached() -> io::Result<()> {
+        let repo_dir = fixture_repo(FixtureProvider::GIT)?;
+
+        Command::new("git")
+            .args(&["checkout", "@~1"])
+            .current_dir(&repo_dir.path())
+            .output()?;
+
+        let mut git_output = Command::new("git")
+            .args(&["rev-parse", "HEAD"])
+            .current_dir(&repo_dir.path())
+            .output()?
+            .stdout;
+        git_output.truncate(7);
+        let expected_hash = str::from_utf8(&git_output).unwrap();
+
+        let actual = ModuleRenderer::new("git_commit")
+            .path(&repo_dir.path())
+            .collect();
+
+        let expected = Some(format!(
+            "{} ",
+            Color::Green
+                .bold()
+                .paint(format!("({})", expected_hash))
+                .to_string()
+        ));
+
+        assert_eq!(expected, actual);
+        repo_dir.close()
+    }
+}

src/modules/git_state.rs

@@ -153,3 +153,195 @@ struct StateDescription<'a> {
     current: Option<String>,
     total: Option<String>,
 }
+
+#[cfg(test)]
+mod tests {
+    use ansi_term::Color;
+    use std::ffi::OsStr;
+    use std::fs::OpenOptions;
+    use std::io::{self, Error, ErrorKind, Write};
+    use std::path::Path;
+    use std::process::{Command, Stdio};
+
+    use crate::test::ModuleRenderer;
+
+    #[test]
+    fn show_nothing_on_empty_dir() -> io::Result<()> {
+        let repo_dir = tempfile::tempdir()?;
+
+        let actual = ModuleRenderer::new("git_state")
+            .path(repo_dir.path())
+            .collect();
+
+        let expected = None;
+
+        assert_eq!(expected, actual);
+        repo_dir.close()
+    }
+
+    #[test]
+    fn shows_rebasing() -> io::Result<()> {
+        let repo_dir = create_repo_with_conflict()?;
+        let path = repo_dir.path();
+
+        run_git_cmd(&["rebase", "other-branch"], Some(path), false)?;
+
+        let actual = ModuleRenderer::new("git_state").path(path).collect();
+
+        let expected = Some(format!("{} ", Color::Yellow.bold().paint("(REBASING 1/1)")));
+
+        assert_eq!(expected, actual);
+        repo_dir.close()
+    }
+
+    #[test]
+    fn shows_merging() -> io::Result<()> {
+        let repo_dir = create_repo_with_conflict()?;
+        let path = repo_dir.path();
+
+        run_git_cmd(&["merge", "other-branch"], Some(path), false)?;
+
+        let actual = ModuleRenderer::new("git_state").path(path).collect();
+
+        let expected = Some(format!("{} ", Color::Yellow.bold().paint("(MERGING)")));
+
+        assert_eq!(expected, actual);
+        repo_dir.close()
+    }
+
+    #[test]
+    fn shows_cherry_picking() -> io::Result<()> {
+        let repo_dir = create_repo_with_conflict()?;
+        let path = repo_dir.path();
+
+        run_git_cmd(&["cherry-pick", "other-branch"], Some(path), false)?;
+
+        let actual = ModuleRenderer::new("git_state").path(path).collect();
+
+        let expected = Some(format!(
+            "{} ",
+            Color::Yellow.bold().paint("(CHERRY-PICKING)")
+        ));
+
+        assert_eq!(expected, actual);
+        repo_dir.close()
+    }
+
+    #[test]
+    fn shows_bisecting() -> io::Result<()> {
+        let repo_dir = create_repo_with_conflict()?;
+        let path = repo_dir.path();
+
+        run_git_cmd(&["bisect", "start"], Some(path), false)?;
+
+        let actual = ModuleRenderer::new("git_state").path(path).collect();
+
+        let expected = Some(format!("{} ", Color::Yellow.bold().paint("(BISECTING)")));
+
+        assert_eq!(expected, actual);
+        repo_dir.close()
+    }
+
+    #[test]
+    fn shows_reverting() -> io::Result<()> {
+        let repo_dir = create_repo_with_conflict()?;
+        let path = repo_dir.path();
+
+        run_git_cmd(&["revert", "--no-commit", "HEAD~1"], Some(path), false)?;
+
+        let actual = ModuleRenderer::new("git_state").path(path).collect();
+
+        let expected = Some(format!("{} ", Color::Yellow.bold().paint("(REVERTING)")));
+
+        assert_eq!(expected, actual);
+        repo_dir.close()
+    }
+
+    fn run_git_cmd<A, S>(args: A, dir: Option<&Path>, should_succeed: bool) -> io::Result<()>
+    where
+        A: IntoIterator<Item = S>,
+        S: AsRef<OsStr>,
+    {
+        let mut command = Command::new("git");
+        command
+            .args(args)
+            .stdout(Stdio::null())
+            .stderr(Stdio::null())
+            .stdin(Stdio::null());
+
+        if let Some(dir) = dir {
+            command.current_dir(dir);
+        }
+
+        let status = command.status()?;
+
+        if should_succeed && !status.success() {
+            Err(Error::from(ErrorKind::Other))
+        } else {
+            Ok(())
+        }
+    }
+
+    fn create_repo_with_conflict() -> io::Result<tempfile::TempDir> {
+        let repo_dir = tempfile::tempdir()?;
+        let path = repo_dir.path();
+        let conflicted_file = repo_dir.path().join("the_file");
+
+        let write_file = |text: &str| {
+            let mut file = OpenOptions::new()
+                .write(true)
+                .create(true)
+                .truncate(true)
+                .open(&conflicted_file)?;
+            write!(file, "{}", text)
+        };
+
+        // Initialize a new git repo
+        run_git_cmd(
+            &[
+                "init",
+                "--quiet",
+                path.to_str().expect("Path was not UTF-8"),
+            ],
+            None,
+            true,
+        )?;
+
+        // Set local author info
+        run_git_cmd(
+            &["config", "--local", "user.email", "starship@example.com"],
+            Some(path),
+            true,
+        )?;
+        run_git_cmd(
+            &["config", "--local", "user.name", "starship"],
+            Some(path),
+            true,
+        )?;
+
+        // Write a file on master and commit it
+        write_file("Version A")?;
+        run_git_cmd(&["add", "the_file"], Some(path), true)?;
+        run_git_cmd(&["commit", "--message", "Commit A"], Some(path), true)?;
+
+        // Switch to another branch, and commit a change to the file
+        run_git_cmd(&["checkout", "-b", "other-branch"], Some(path), true)?;
+        write_file("Version B")?;
+        run_git_cmd(
+            &["commit", "--all", "--message", "Commit B"],
+            Some(path),
+            true,
+        )?;
+
+        // Switch back to master, and commit a third change to the file
+        run_git_cmd(&["checkout", "master"], Some(path), true)?;
+        write_file("Version C")?;
+        run_git_cmd(
+            &["commit", "--all", "--message", "Commit C"],
+            Some(path),
+            true,
+        )?;
+
+        Ok(repo_dir)
+    }
+}

src/modules/git_status.rs

@@ -371,3 +371,599 @@ fn format_count(format_str: &str, config_path: &str, count: usize) -> Option<Vec
         _ => None,
     })
 }
+
+#[cfg(test)]
+mod tests {
+    use ansi_term::{ANSIStrings, Color};
+    use std::fs::{self, File};
+    use std::io;
+    use std::path::Path;
+    use std::process::Command;
+
+    use crate::test::{fixture_repo, FixtureProvider, ModuleRenderer};
+
+    /// Right after the calls to git the filesystem state may not have finished
+    /// updating yet causing some of the tests to fail. These barriers are placed
+    /// after each call to git.
+    /// This barrier is windows-specific though other operating systems may need it
+    /// in the future.
+    #[cfg(not(windows))]
+    fn barrier() {}
+    #[cfg(windows)]
+    fn barrier() {
+        std::thread::sleep(std::time::Duration::from_millis(500));
+    }
+
+    fn format_output(symbols: &str) -> Option<String> {
+        Some(format!(
+            "{} ",
+            Color::Red.bold().paint(format!("[{}]", symbols))
+        ))
+    }
+
+    #[test]
+    fn show_nothing_on_empty_dir() -> io::Result<()> {
+        let repo_dir = tempfile::tempdir()?;
+
+        let actual = ModuleRenderer::new("git_status")
+            .path(repo_dir.path())
+            .collect();
+        let expected = None;
+
+        assert_eq!(expected, actual);
+        repo_dir.close()
+    }
+
+    #[test]
+    fn shows_behind() -> io::Result<()> {
+        let repo_dir = fixture_repo(FixtureProvider::GIT)?;
+
+        behind(&repo_dir.path())?;
+
+        let actual = ModuleRenderer::new("git_status")
+            .path(repo_dir.path())
+            .collect();
+        let expected = format_output("⇣");
+
+        assert_eq!(expected, actual);
+        repo_dir.close()
+    }
+
+    #[test]
+    fn shows_behind_with_count() -> io::Result<()> {
+        let repo_dir = fixture_repo(FixtureProvider::GIT)?;
+
+        behind(&repo_dir.path())?;
+
+        let actual = ModuleRenderer::new("git_status")
+            .config(toml::toml! {
+                [git_status]
+                behind = "⇣$count"
+            })
+            .path(repo_dir.path())
+            .collect();
+        let expected = format_output("⇣1");
+
+        assert_eq!(expected, actual);
+        repo_dir.close()
+    }
+
+    #[test]
+    fn shows_ahead() -> io::Result<()> {
+        let repo_dir = fixture_repo(FixtureProvider::GIT)?;
+
+        File::create(repo_dir.path().join("readme.md"))?.sync_all()?;
+        ahead(&repo_dir.path())?;
+
+        let actual = ModuleRenderer::new("git_status")
+            .path(&repo_dir.path())
+            .collect();
+        let expected = format_output("⇡");
+
+        assert_eq!(expected, actual);
+        repo_dir.close()
+    }
+
+    #[test]
+    fn shows_ahead_with_count() -> io::Result<()> {
+        let repo_dir = fixture_repo(FixtureProvider::GIT)?;
+
+        File::create(repo_dir.path().join("readme.md"))?.sync_all()?;
+        ahead(&repo_dir.path())?;
+
+        let actual = ModuleRenderer::new("git_status")
+            .config(toml::toml! {
+                [git_status]
+                ahead="⇡$count"
+            })
+            .path(&repo_dir.path())
+            .collect();
+        let expected = format_output("⇡1");
+
+        assert_eq!(expected, actual);
+        repo_dir.close()
+    }
+
+    #[test]
+    fn shows_diverged() -> io::Result<()> {
+        let repo_dir = fixture_repo(FixtureProvider::GIT)?;
+
+        diverge(&repo_dir.path())?;
+
+        let actual = ModuleRenderer::new("git_status")
+            .path(&repo_dir.path())
+            .collect();
+        let expected = format_output("⇕");
+
+        assert_eq!(expected, actual);
+        repo_dir.close()
+    }
+
+    #[test]
+    fn shows_diverged_with_count() -> io::Result<()> {
+        let repo_dir = fixture_repo(FixtureProvider::GIT)?;
+
+        diverge(&repo_dir.path())?;
+
+        let actual = ModuleRenderer::new("git_status")
+            .config(toml::toml! {
+                [git_status]
+                diverged=r"⇕⇡$ahead_count⇣$behind_count"
+            })
+            .path(&repo_dir.path())
+            .collect();
+        let expected = format_output("⇕⇡1⇣1");
+
+        assert_eq!(expected, actual);
+        repo_dir.close()
+    }
+
+    #[test]
+    fn shows_conflicted() -> io::Result<()> {
+        let repo_dir = fixture_repo(FixtureProvider::GIT)?;
+
+        create_conflict(&repo_dir.path())?;
+
+        let actual = ModuleRenderer::new("git_status")
+            .path(&repo_dir.path())
+            .collect();
+        let expected = format_output("=");
+
+        assert_eq!(expected, actual);
+        repo_dir.close()
+    }
+
+    #[test]
+    fn shows_conflicted_with_count() -> io::Result<()> {
+        let repo_dir = fixture_repo(FixtureProvider::GIT)?;
+
+        create_conflict(&repo_dir.path())?;
+
+        let actual = ModuleRenderer::new("git_status")
+            .config(toml::toml! {
+                [git_status]
+                conflicted = "=$count"
+            })
+            .path(&repo_dir.path())
+            .collect();
+        let expected = format_output("=1");
+
+        assert_eq!(expected, actual);
+        repo_dir.close()
+    }
+
+    #[test]
+    fn shows_untracked_file() -> io::Result<()> {
+        let repo_dir = fixture_repo(FixtureProvider::GIT)?;
+
+        create_untracked(&repo_dir.path())?;
+
+        let actual = ModuleRenderer::new("git_status")
+            .path(&repo_dir.path())
+            .collect();
+        let expected = format_output("?");
+
+        assert_eq!(expected, actual);
+        repo_dir.close()
+    }
+
+    #[test]
+    fn shows_untracked_file_with_count() -> io::Result<()> {
+        let repo_dir = fixture_repo(FixtureProvider::GIT)?;
+
+        create_untracked(&repo_dir.path())?;
+
+        let actual = ModuleRenderer::new("git_status")
+            .config(toml::toml! {
+                [git_status]
+                untracked = "?$count"
+            })
+            .path(&repo_dir.path())
+            .collect();
+        let expected = format_output("?1");
+
+        assert_eq!(expected, actual);
+        repo_dir.close()
+    }
+
+    #[test]
+    fn doesnt_show_untracked_file_if_disabled() -> io::Result<()> {
+        let repo_dir = fixture_repo(FixtureProvider::GIT)?;
+
+        create_untracked(&repo_dir.path())?;
+
+        Command::new("git")
+            .args(&["config", "status.showUntrackedFiles", "no"])
+            .current_dir(repo_dir.path())
+            .output()?;
+        barrier();
+
+        let actual = ModuleRenderer::new("git_status")
+            .path(&repo_dir.path())
+            .collect();
+        let expected = None;
+
+        assert_eq!(expected, actual);
+        repo_dir.close()
+    }
+
+    #[test]
+    fn shows_stashed() -> io::Result<()> {
+        let repo_dir = fixture_repo(FixtureProvider::GIT)?;
+        barrier();
+
+        create_stash(&repo_dir.path())?;
+
+        Command::new("git")
+            .args(&["reset", "--hard", "HEAD"])
+            .current_dir(repo_dir.path())
+            .output()?;
+        barrier();
+
+        let actual = ModuleRenderer::new("git_status")
+            .path(&repo_dir.path())
+            .collect();
+        let expected = format_output("$");
+
+        assert_eq!(expected, actual);
+        repo_dir.close()
+    }
+
+    #[test]
+    fn shows_stashed_with_count() -> io::Result<()> {
+        let repo_dir = fixture_repo(FixtureProvider::GIT)?;
+        barrier();
+
+        create_stash(&repo_dir.path())?;
+        barrier();
+
+        Command::new("git")
+            .args(&["reset", "--hard", "HEAD"])
+            .current_dir(repo_dir.path())
+            .output()?;
+        barrier();
+
+        let actual = ModuleRenderer::new("git_status")
+            .config(toml::toml! {
+                [git_status]
+                stashed = r"\$$count"
+            })
+            .path(&repo_dir.path())
+            .collect();
+        let expected = format_output("$1");
+
+        assert_eq!(expected, actual);
+        repo_dir.close()
+    }
+
+    #[test]
+    fn shows_modified() -> io::Result<()> {
+        let repo_dir = fixture_repo(FixtureProvider::GIT)?;
+
+        create_modified(&repo_dir.path())?;
+
+        let actual = ModuleRenderer::new("git_status")
+            .path(&repo_dir.path())
+            .collect();
+        let expected = format_output("!");
+
+        assert_eq!(expected, actual);
+        repo_dir.close()
+    }
+
+    #[test]
+    fn shows_modified_with_count() -> io::Result<()> {
+        let repo_dir = fixture_repo(FixtureProvider::GIT)?;
+
+        create_modified(&repo_dir.path())?;
+
+        let actual = ModuleRenderer::new("git_status")
+            .config(toml::toml! {
+                [git_status]
+                modified = "!$count"
+            })
+            .path(&repo_dir.path())
+            .collect();
+        let expected = format_output("!1");
+
+        assert_eq!(expected, actual);
+        repo_dir.close()
+    }
+
+    #[test]
+    fn shows_staged_file() -> io::Result<()> {
+        let repo_dir = fixture_repo(FixtureProvider::GIT)?;
+
+        create_staged(&repo_dir.path())?;
+
+        let actual = ModuleRenderer::new("git_status")
+            .path(&repo_dir.path())
+            .collect();
+        let expected = format_output("+");
+
+        assert_eq!(expected, actual);
+        repo_dir.close()
+    }
+
+    #[test]
+    fn shows_staged_file_with_count() -> io::Result<()> {
+        let repo_dir = fixture_repo(FixtureProvider::GIT)?;
+
+        create_staged(&repo_dir.path())?;
+
+        let actual = ModuleRenderer::new("git_status")
+            .config(toml::toml! {
+                [git_status]
+                staged = "+[$count](green)"
+            })
+            .path(&repo_dir.path())
+            .collect();
+        let expected = Some(format!(
+            "{} ",
+            ANSIStrings(&[
+                Color::Red.bold().paint("[+"),
+                Color::Green.paint("1"),
+                Color::Red.bold().paint("]"),
+            ])
+        ));
+
+        assert_eq!(expected, actual);
+        repo_dir.close()
+    }
+
+    #[test]
+    fn shows_renamed_file() -> io::Result<()> {
+        let repo_dir = fixture_repo(FixtureProvider::GIT)?;
+
+        create_renamed(&repo_dir.path())?;
+
+        let actual = ModuleRenderer::new("git_status")
+            .path(&repo_dir.path())
+            .collect();
+        let expected = format_output("»");
+
+        assert_eq!(expected, actual);
+        repo_dir.close()
+    }
+
+    #[test]
+    fn shows_renamed_file_with_count() -> io::Result<()> {
+        let repo_dir = fixture_repo(FixtureProvider::GIT)?;
+
+        create_renamed(&repo_dir.path())?;
+
+        let actual = ModuleRenderer::new("git_status")
+            .config(toml::toml! {
+                [git_status]
+                renamed = "»$count"
+            })
+            .path(&repo_dir.path())
+            .collect();
+        let expected = format_output("»1");
+
+        assert_eq!(expected, actual);
+        repo_dir.close()
+    }
+
+    #[test]
+    fn shows_deleted_file() -> io::Result<()> {
+        let repo_dir = fixture_repo(FixtureProvider::GIT)?;
+
+        create_deleted(&repo_dir.path())?;
+
+        let actual = ModuleRenderer::new("git_status")
+            .path(&repo_dir.path())
+            .collect();
+        let expected = format_output("✘");
+
+        assert_eq!(expected, actual);
+        repo_dir.close()
+    }
+
+    #[test]
+    fn shows_deleted_file_with_count() -> io::Result<()> {
+        let repo_dir = fixture_repo(FixtureProvider::GIT)?;
+
+        create_deleted(&repo_dir.path())?;
+
+        let actual = ModuleRenderer::new("git_status")
+            .config(toml::toml! {
+                [git_status]
+                deleted = "✘$count"
+            })
+            .path(&repo_dir.path())
+            .collect();
+        let expected = format_output("✘1");
+
+        assert_eq!(expected, actual);
+        repo_dir.close()
+    }
+
+    // Whenever a file is manually renamed, git itself ('git status') does not treat such file as renamed,
+    // but as untracked instead. The following test checks if manually deleted and manually renamed
+    // files are tracked by git_status module in the same way 'git status' does.
+    #[test]
+    #[ignore]
+    fn ignore_manually_renamed() -> io::Result<()> {
+        let repo_dir = fixture_repo(FixtureProvider::GIT)?;
+        File::create(repo_dir.path().join("a"))?.sync_all()?;
+        File::create(repo_dir.path().join("b"))?.sync_all()?;
+        Command::new("git")
+            .args(&["add", "--all"])
+            .current_dir(&repo_dir.path())
+            .output()?;
+        Command::new("git")
+            .args(&["commit", "-m", "add new files"])
+            .current_dir(&repo_dir.path())
+            .output()?;
+
+        fs::remove_file(repo_dir.path().join("a"))?;
+        fs::rename(repo_dir.path().join("b"), repo_dir.path().join("c"))?;
+        barrier();
+
+        let actual = ModuleRenderer::new("git_status")
+            .path(&repo_dir.path())
+            .config(toml::toml! {
+                [git_status]
+                ahead = "A"
+                deleted = "D"
+                untracked = "U"
+                renamed = "R"
+            })
+            .collect();
+        let expected = format_output("DUA");
+
+        assert_eq!(actual, expected);
+
+        repo_dir.close()
+    }
+
+    fn ahead(repo_dir: &Path) -> io::Result<()> {
+        File::create(repo_dir.join("readme.md"))?.sync_all()?;
+
+        Command::new("git")
+            .args(&["commit", "-am", "Update readme"])
+            .current_dir(&repo_dir)
+            .output()?;
+        barrier();
+
+        Ok(())
+    }
+
+    fn behind(repo_dir: &Path) -> io::Result<()> {
+        Command::new("git")
+            .args(&["reset", "--hard", "HEAD^"])
+            .current_dir(repo_dir)
+            .output()?;
+        barrier();
+
+        Ok(())
+    }
+
+    fn diverge(repo_dir: &Path) -> io::Result<()> {
+        Command::new("git")
+            .args(&["reset", "--hard", "HEAD^"])
+            .current_dir(repo_dir)
+            .output()?;
+        barrier();
+
+        fs::write(repo_dir.join("Cargo.toml"), " ")?;
+
+        Command::new("git")
+            .args(&["commit", "-am", "Update readme"])
+            .current_dir(repo_dir)
+            .output()?;
+        barrier();
+
+        Ok(())
+    }
+
+    fn create_conflict(repo_dir: &Path) -> io::Result<()> {
+        Command::new("git")
+            .args(&["reset", "--hard", "HEAD^"])
+            .current_dir(repo_dir)
+            .output()?;
+        barrier();
+
+        fs::write(repo_dir.join("readme.md"), "# goodbye")?;
+
+        Command::new("git")
+            .args(&["add", "."])
+            .current_dir(repo_dir)
+            .output()?;
+        barrier();
+
+        Command::new("git")
+            .args(&["commit", "-m", "Change readme"])
+            .current_dir(repo_dir)
+            .output()?;
+        barrier();
+
+        Command::new("git")
+            .args(&["pull", "--rebase"])
+            .current_dir(repo_dir)
+            .output()?;
+        barrier();
+
+        Ok(())
+    }
+
+    fn create_stash(repo_dir: &Path) -> io::Result<()> {
+        File::create(repo_dir.join("readme.md"))?.sync_all()?;
+        barrier();
+
+        Command::new("git")
+            .args(&["stash", "--all"])
+            .current_dir(repo_dir)
+            .output()?;
+        barrier();
+
+        Ok(())
+    }
+
+    fn create_untracked(repo_dir: &Path) -> io::Result<()> {
+        File::create(repo_dir.join("license"))?.sync_all()?;
+
+        Ok(())
+    }
+
+    fn create_modified(repo_dir: &Path) -> io::Result<()> {
+        File::create(repo_dir.join("readme.md"))?.sync_all()?;
+
+        Ok(())
+    }
+
+    fn create_staged(repo_dir: &Path) -> io::Result<()> {
+        File::create(repo_dir.join("license"))?.sync_all()?;
+
+        Command::new("git")
+            .args(&["add", "."])
+            .current_dir(repo_dir)
+            .output()?;
+        barrier();
+
+        Ok(())
+    }
+
+    fn create_renamed(repo_dir: &Path) -> io::Result<()> {
+        Command::new("git")
+            .args(&["mv", "readme.md", "readme.md.bak"])
+            .current_dir(repo_dir)
+            .output()?;
+        barrier();
+
+        Command::new("git")
+            .args(&["add", "-A"])
+            .current_dir(repo_dir)
+            .output()?;
+        barrier();
+
+        Ok(())
+    }
+
+    fn create_deleted(repo_dir: &Path) -> io::Result<()> {
+        fs::remove_file(repo_dir.join("readme.md"))?;
+
+        Ok(())
+    }
+}

src/modules/golang.rs

@@ -86,7 +86,7 @@ fn format_go_version(go_stdout: &str) -> Option<String> {
 #[cfg(test)]
 mod tests {
     use super::*;
-    use crate::modules::utils::test::render_module;
+    use crate::test::ModuleRenderer;
     use ansi_term::Color;
     use std::fs::{self, File};
     use std::io;
@@ -95,7 +95,7 @@ mod tests {
     fn folder_without_go_files() -> io::Result<()> {
         let dir = tempfile::tempdir()?;
 
-        let actual = render_module("golang", dir.path(), None);
+        let actual = ModuleRenderer::new("golang").path(dir.path()).collect();
 
         let expected = None;
         assert_eq!(expected, actual);
@@ -107,7 +107,7 @@ mod tests {
         let dir = tempfile::tempdir()?;
         File::create(dir.path().join("main.go"))?.sync_all()?;
 
-        let actual = render_module("golang", dir.path(), None);
+        let actual = ModuleRenderer::new("golang").path(dir.path()).collect();
 
         let expected = Some(format!("via {} ", Color::Cyan.bold().paint("🐹 v1.12.1")));
         assert_eq!(expected, actual);
@@ -119,7 +119,7 @@ mod tests {
         let dir = tempfile::tempdir()?;
         File::create(dir.path().join("go.mod"))?.sync_all()?;
 
-        let actual = render_module("golang", dir.path(), None);
+        let actual = ModuleRenderer::new("golang").path(dir.path()).collect();
 
         let expected = Some(format!("via {} ", Color::Cyan.bold().paint("🐹 v1.12.1")));
         assert_eq!(expected, actual);
@@ -131,7 +131,7 @@ mod tests {
         let dir = tempfile::tempdir()?;
         File::create(dir.path().join("go.sum"))?.sync_all()?;
 
-        let actual = render_module("golang", dir.path(), None);
+        let actual = ModuleRenderer::new("golang").path(dir.path()).collect();
 
         let expected = Some(format!("via {} ", Color::Cyan.bold().paint("🐹 v1.12.1")));
         assert_eq!(expected, actual);
@@ -144,7 +144,7 @@ mod tests {
         let godeps = dir.path().join("Godeps");
         fs::create_dir_all(&godeps)?;
 
-        let actual = render_module("golang", dir.path(), None);
+        let actual = ModuleRenderer::new("golang").path(dir.path()).collect();
 
         let expected = Some(format!("via {} ", Color::Cyan.bold().paint("🐹 v1.12.1")));
         assert_eq!(expected, actual);
@@ -156,7 +156,7 @@ mod tests {
         let dir = tempfile::tempdir()?;
         File::create(dir.path().join("glide.yaml"))?.sync_all()?;
 
-        let actual = render_module("golang", dir.path(), None);
+        let actual = ModuleRenderer::new("golang").path(dir.path()).collect();
 
         let expected = Some(format!("via {} ", Color::Cyan.bold().paint("🐹 v1.12.1")));
         assert_eq!(expected, actual);
@@ -168,7 +168,7 @@ mod tests {
         let dir = tempfile::tempdir()?;
         File::create(dir.path().join("Gopkg.yml"))?.sync_all()?;
 
-        let actual = render_module("golang", dir.path(), None);
+        let actual = ModuleRenderer::new("golang").path(dir.path()).collect();
 
         let expected = Some(format!("via {} ", Color::Cyan.bold().paint("🐹 v1.12.1")));
         assert_eq!(expected, actual);
@@ -179,7 +179,7 @@ mod tests {
         let dir = tempfile::tempdir()?;
         File::create(dir.path().join("Gopkg.lock"))?.sync_all()?;
 
-        let actual = render_module("golang", dir.path(), None);
+        let actual = ModuleRenderer::new("golang").path(dir.path()).collect();
         let expected = Some(format!("via {} ", Color::Cyan.bold().paint("🐹 v1.12.1")));
         assert_eq!(expected, actual);
         dir.close()
@@ -189,7 +189,7 @@ mod tests {
         let dir = tempfile::tempdir()?;
         File::create(dir.path().join(".go-version"))?.sync_all()?;
 
-        let actual = render_module("golang", dir.path(), None);
+        let actual = ModuleRenderer::new("golang").path(dir.path()).collect();
         let expected = Some(format!("via {} ", Color::Cyan.bold().paint("🐹 v1.12.1")));
         assert_eq!(expected, actual);
         dir.close()

src/modules/helm.rs

@@ -77,7 +77,7 @@ fn format_helm_version(helm_stdout: &str) -> Option<String> {
 #[cfg(test)]
 mod tests {
     use super::*;
-    use crate::modules::utils::test::render_module;
+    use crate::test::ModuleRenderer;
     use ansi_term::Color;
     use std::fs::File;
     use std::io;
@@ -86,7 +86,7 @@ mod tests {
     fn folder_without_helm_files() -> io::Result<()> {
         let dir = tempfile::tempdir()?;
 
-        let actual = render_module("helm", dir.path(), None);
+        let actual = ModuleRenderer::new("helm").path(dir.path()).collect();
 
         let expected = None;
         assert_eq!(expected, actual);
@@ -98,7 +98,7 @@ mod tests {
         let dir = tempfile::tempdir()?;
         File::create(dir.path().join("helmfile.yaml"))?.sync_all()?;
 
-        let actual = render_module("helm", dir.path(), None);
+        let actual = ModuleRenderer::new("helm").path(dir.path()).collect();
 
         let expected = Some(format!("via {} ", Color::White.bold().paint("⎈ v3.1.1")));
         assert_eq!(expected, actual);
@@ -110,7 +110,7 @@ mod tests {
         let dir = tempfile::tempdir()?;
         File::create(dir.path().join("Chart.yaml"))?.sync_all()?;
 
-        let actual = render_module("helm", dir.path(), None);
+        let actual = ModuleRenderer::new("helm").path(dir.path()).collect();
 
         let expected = Some(format!("via {} ", Color::White.bold().paint("⎈ v3.1.1")));
         assert_eq!(expected, actual);

src/modules/hg_branch.rs

@@ -92,3 +92,228 @@ fn get_graphemes(text: &str, length: usize) -> String {
 fn graphemes_len(text: &str) -> usize {
     UnicodeSegmentation::graphemes(&text[..], true).count()
 }
+
+#[cfg(test)]
+mod tests {
+    use ansi_term::{Color, Style};
+    use std::fs;
+    use std::io;
+    use std::path::Path;
+    use std::process::Command;
+
+    use crate::test::{fixture_repo, FixtureProvider, ModuleRenderer};
+
+    enum Expect<'a> {
+        BranchName(&'a str),
+        Empty,
+        NoTruncation,
+        Symbol(&'a str),
+        Style(Style),
+        TruncationSymbol(&'a str),
+    }
+
+    #[test]
+    fn show_nothing_on_empty_dir() -> io::Result<()> {
+        let repo_dir = tempfile::tempdir()?;
+
+        let actual = ModuleRenderer::new("hg_branch")
+            .path(repo_dir.path())
+            .collect();
+
+        let expected = None;
+        assert_eq!(expected, actual);
+        repo_dir.close()
+    }
+
+    #[test]
+    #[ignore]
+    fn test_hg_get_branch_fails() -> io::Result<()> {
+        let tempdir = tempfile::tempdir()?;
+
+        // Create a fake corrupted mercurial repo.
+        let hgdir = tempdir.path().join(".hg");
+        fs::create_dir(&hgdir)?;
+        fs::write(&hgdir.join("requires"), "fake-corrupted-repo")?;
+
+        expect_hg_branch_with_config(
+            tempdir.path(),
+            None,
+            &[Expect::BranchName(&"default"), Expect::NoTruncation],
+        )?;
+        tempdir.close()
+    }
+
+    #[test]
+    #[ignore]
+    fn test_hg_get_branch_autodisabled() -> io::Result<()> {
+        let tempdir = tempfile::tempdir()?;
+        expect_hg_branch_with_config(tempdir.path(), None, &[Expect::Empty])?;
+        tempdir.close()
+    }
+
+    #[test]
+    #[ignore]
+    fn test_hg_bookmark() -> io::Result<()> {
+        let tempdir = fixture_repo(FixtureProvider::HG)?;
+        let repo_dir = tempdir.path();
+        run_hg(&["bookmark", "bookmark-101"], &repo_dir)?;
+        expect_hg_branch_with_config(
+            &repo_dir,
+            None,
+            &[Expect::BranchName(&"bookmark-101"), Expect::NoTruncation],
+        )?;
+        tempdir.close()
+    }
+
+    #[test]
+    #[ignore]
+    fn test_default_truncation_symbol() -> io::Result<()> {
+        let tempdir = fixture_repo(FixtureProvider::HG)?;
+        let repo_dir = tempdir.path();
+        run_hg(&["branch", "-f", "branch-name-101"], &repo_dir)?;
+        run_hg(
+            &[
+                "commit",
+                "-m",
+                "empty commit 101",
+                "-u",
+                "fake user <fake@user>",
+            ],
+            &repo_dir,
+        )?;
+        expect_hg_branch_with_config(
+            &repo_dir,
+            Some(toml::toml! {
+                [hg_branch]
+                truncation_length = 14
+            }),
+            &[Expect::BranchName(&"branch-name-10")],
+        )?;
+        tempdir.close()
+    }
+
+    #[test]
+    #[ignore]
+    fn test_configured_symbols() -> io::Result<()> {
+        let tempdir = fixture_repo(FixtureProvider::HG)?;
+        let repo_dir = tempdir.path();
+        run_hg(&["branch", "-f", "branch-name-121"], &repo_dir)?;
+        run_hg(
+            &[
+                "commit",
+                "-m",
+                "empty commit 121",
+                "-u",
+                "fake user <fake@user>",
+            ],
+            &repo_dir,
+        )?;
+        expect_hg_branch_with_config(
+            &repo_dir,
+            Some(toml::toml! {
+                [hg_branch]
+                symbol = "B "
+                truncation_length = 14
+                truncation_symbol = "%"
+            }),
+            &[
+                Expect::BranchName(&"branch-name-12"),
+                Expect::Symbol(&"B"),
+                Expect::TruncationSymbol(&"%"),
+            ],
+        )?;
+        tempdir.close()
+    }
+
+    #[test]
+    #[ignore]
+    fn test_configured_style() -> io::Result<()> {
+        let tempdir = fixture_repo(FixtureProvider::HG)?;
+        let repo_dir = tempdir.path();
+        run_hg(&["branch", "-f", "branch-name-131"], &repo_dir)?;
+        run_hg(
+            &[
+                "commit",
+                "-m",
+                "empty commit 131",
+                "-u",
+                "fake user <fake@user>",
+            ],
+            &repo_dir,
+        )?;
+
+        expect_hg_branch_with_config(
+            &repo_dir,
+            Some(toml::toml! {
+                [hg_branch]
+                style = "underline blue"
+            }),
+            &[
+                Expect::BranchName(&"branch-name-131"),
+                Expect::Style(Color::Blue.underline()),
+                Expect::TruncationSymbol(&""),
+            ],
+        )?;
+        tempdir.close()
+    }
+
+    fn expect_hg_branch_with_config(
+        repo_dir: &Path,
+        config: Option<toml::Value>,
+        expectations: &[Expect],
+    ) -> io::Result<()> {
+        let actual = ModuleRenderer::new("hg_branch")
+            .path(repo_dir.to_str().unwrap())
+            .config(config.unwrap_or_else(|| {
+                toml::toml! {
+                    [hg_branch]
+                }
+            }))
+            .collect();
+
+        let mut expect_branch_name = "default";
+        let mut expect_style = Color::Purple.bold();
+        let mut expect_symbol = "\u{e0a0}";
+        let mut expect_truncation_symbol = "…";
+
+        for expect in expectations {
+            match expect {
+                Expect::Empty => {
+                    assert_eq!(None, actual);
+                    return Ok(());
+                }
+                Expect::Symbol(symbol) => {
+                    expect_symbol = symbol;
+                }
+                Expect::TruncationSymbol(truncation_symbol) => {
+                    expect_truncation_symbol = truncation_symbol;
+                }
+                Expect::NoTruncation => {
+                    expect_truncation_symbol = "";
+                }
+                Expect::BranchName(branch_name) => {
+                    expect_branch_name = branch_name;
+                }
+                Expect::Style(style) => expect_style = *style,
+            }
+        }
+
+        let expected = Some(format!(
+            "on {} ",
+            expect_style.paint(format!(
+                "{} {}{}",
+                expect_symbol, expect_branch_name, expect_truncation_symbol
+            )),
+        ));
+        assert_eq!(expected, actual);
+        Ok(())
+    }
+
+    fn run_hg(args: &[&str], repo_dir: &Path) -> io::Result<()> {
+        Command::new("hg")
+            .args(args)
+            .current_dir(&repo_dir)
+            .output()?;
+        Ok(())
+    }
+}

src/modules/hostname.rs

@@ -1,5 +1,3 @@
-use std::env;
-
 use super::{Context, Module};
 use std::ffi::OsString;
 
@@ -16,7 +14,7 @@ pub fn module<'a>(context: &'a Context) -> Option<Module<'a>> {
     let mut module = context.new_module("hostname");
     let config: HostnameConfig = HostnameConfig::try_load(module.config);
 
-    let ssh_connection = env::var("SSH_CONNECTION").ok();
+    let ssh_connection = context.get_env("SSH_CONNECTION");
     if config.ssh_only && ssh_connection.is_none() {
         return None;
     }
@@ -66,3 +64,108 @@ pub fn module<'a>(context: &'a Context) -> Option<Module<'a>> {
 
     Some(module)
 }
+
+#[cfg(test)]
+mod tests {
+    use crate::test::ModuleRenderer;
+    use ansi_term::{Color, Style};
+    use std::io;
+
+    macro_rules! get_hostname {
+        () => {
+            if let Some(hostname) = gethostname::gethostname().into_string().ok() {
+                hostname
+            } else {
+                println!(
+                    "hostname was not tested because gethostname failed! \
+                     This could be caused by your hostname containing invalid UTF."
+                );
+                return Ok(());
+            }
+        };
+    }
+
+    #[test]
+    fn ssh_only_false() -> io::Result<()> {
+        let hostname = get_hostname!();
+        let actual = ModuleRenderer::new("hostname")
+            .config(toml::toml! {
+                [hostname]
+                ssh_only = false
+                trim_at = ""
+            })
+            .collect();
+        let expected = Some(format!("on {} ", style().paint(hostname)));
+
+        assert_eq!(expected, actual);
+        Ok(())
+    }
+
+    #[test]
+    fn no_ssh() -> io::Result<()> {
+        let actual = ModuleRenderer::new("hostname")
+            .config(toml::toml! {
+                [hostname]
+                ssh_only = true
+            })
+            .collect();
+        let expected = None;
+
+        assert_eq!(expected, actual);
+        Ok(())
+    }
+
+    #[test]
+    fn ssh() -> io::Result<()> {
+        let hostname = get_hostname!();
+        let actual = ModuleRenderer::new("hostname")
+            .config(toml::toml! {
+                [hostname]
+                ssh_only = true
+                trim_at = ""
+            })
+            .env("SSH_CONNECTION", "something")
+            .collect();
+        let expected = Some(format!("on {} ", style().paint(hostname)));
+
+        assert_eq!(expected, actual);
+        Ok(())
+    }
+
+    #[test]
+    fn no_trim_at() -> io::Result<()> {
+        let hostname = get_hostname!();
+        let actual = ModuleRenderer::new("hostname")
+            .config(toml::toml! {
+                [hostname]
+                ssh_only = false
+                trim_at = ""
+            })
+            .collect();
+        let expected = Some(format!("on {} ", style().paint(hostname)));
+
+        assert_eq!(expected, actual);
+        Ok(())
+    }
+
+    #[test]
+    fn trim_at() -> io::Result<()> {
+        let hostname = get_hostname!();
+        let (remainder, trim_at) = hostname.split_at(1);
+        let actual = ModuleRenderer::new("hostname")
+            .config(toml::toml! {
+                [hostname]
+                ssh_only = false
+                trim_at = trim_at
+            })
+            .collect();
+        let expected = Some(format!("on {} ", style().paint(remainder)));
+
+        assert_eq!(expected, actual);
+        Ok(())
+    }
+
+    fn style() -> Style {
+        Color::Green.bold().dimmed()
+    }
+}

src/modules/java.rs

@@ -24,7 +24,7 @@ pub fn module<'a>(context: &'a Context) -> Option<Module<'a>> {
         return None;
     }
 
-    let java_version = get_java_version()?;
+    let java_version = get_java_version(context)?;
 
     let mut module = context.new_module("java");
     let config: JavaConfig = JavaConfig::try_load(module.config);
@@ -57,10 +57,10 @@ pub fn module<'a>(context: &'a Context) -> Option<Module<'a>> {
     Some(module)
 }
 
-fn get_java_version() -> Option<String> {
-    let java_command = match std::env::var("JAVA_HOME") {
-        Ok(java_home) => format!("{}/bin/java", java_home),
-        Err(_) => String::from("java"),
+fn get_java_version(context: &Context) -> Option<String> {
+    let java_command = match context.get_env("JAVA_HOME") {
+        Some(java_home) => format!("{}/bin/java", java_home),
+        None => String::from("java"),
     };
 
     let output = utils::exec_cmd(&java_command.as_str(), &["-Xinternalversion"])?;
@@ -84,7 +84,7 @@ fn parse_java_version(java_version: &str) -> Option<String> {
 #[cfg(test)]
 mod tests {
     use super::*;
-    use crate::modules::utils::test::render_module;
+    use crate::test::ModuleRenderer;
     use ansi_term::Color;
     use std::fs::File;
     use std::io;
@@ -156,7 +156,7 @@ mod tests {
     #[test]
     fn folder_without_java_file() -> io::Result<()> {
         let dir = tempfile::tempdir()?;
-        let actual = render_module("java", dir.path(), None);
+        let actual = ModuleRenderer::new("java").path(dir.path()).collect();
         let expected = None;
         assert_eq!(expected, actual);
         dir.close()
@@ -166,7 +166,7 @@ mod tests {
     fn folder_with_java_file() -> io::Result<()> {
         let dir = tempfile::tempdir()?;
         File::create(dir.path().join("Main.java"))?.sync_all()?;
-        let actual = render_module("java", dir.path(), None);
+        let actual = ModuleRenderer::new("java").path(dir.path()).collect();
         let expected = Some(format!("via {} ", Color::Red.dimmed().paint("☕ v13.0.2")));
         assert_eq!(expected, actual);
         dir.close()
@@ -176,7 +176,7 @@ mod tests {
     fn folder_with_class_file() -> io::Result<()> {
         let dir = tempfile::tempdir()?;
         File::create(dir.path().join("Main.class"))?.sync_all()?;
-        let actual = render_module("java", dir.path(), None);
+        let actual = ModuleRenderer::new("java").path(dir.path()).collect();
         let expected = Some(format!("via {} ", Color::Red.dimmed().paint("☕ v13.0.2")));
         assert_eq!(expected, actual);
         dir.close()
@@ -186,7 +186,7 @@ mod tests {
     fn folder_with_gradle_file() -> io::Result<()> {
         let dir = tempfile::tempdir()?;
         File::create(dir.path().join("build.gradle"))?.sync_all()?;
-        let actual = render_module("java", dir.path(), None);
+        let actual = ModuleRenderer::new("java").path(dir.path()).collect();
         let expected = Some(format!("via {} ", Color::Red.dimmed().paint("☕ v13.0.2")));
         assert_eq!(expected, actual);
         dir.close()
@@ -196,7 +196,7 @@ mod tests {
     fn folder_with_jar_archive() -> io::Result<()> {
         let dir = tempfile::tempdir()?;
         File::create(dir.path().join("test.jar"))?.sync_all()?;
-        let actual = render_module("java", dir.path(), None);
+        let actual = ModuleRenderer::new("java").path(dir.path()).collect();
         let expected = Some(format!("via {} ", Color::Red.dimmed().paint("☕ v13.0.2")));
         assert_eq!(expected, actual);
         dir.close()
@@ -206,7 +206,7 @@ mod tests {
     fn folder_with_pom_file() -> io::Result<()> {
         let dir = tempfile::tempdir()?;
         File::create(dir.path().join("pom.xml"))?.sync_all()?;
-        let actual = render_module("java", dir.path(), None);
+        let actual = ModuleRenderer::new("java").path(dir.path()).collect();
         let expected = Some(format!("via {} ", Color::Red.dimmed().paint("☕ v13.0.2")));
         assert_eq!(expected, actual);
         dir.close()
@@ -216,7 +216,7 @@ mod tests {
     fn folder_with_gradle_kotlin_build_file() -> io::Result<()> {
         let dir = tempfile::tempdir()?;
         File::create(dir.path().join("build.gradle.kts"))?.sync_all()?;
-        let actual = render_module("java", dir.path(), None);
+        let actual = ModuleRenderer::new("java").path(dir.path()).collect();
         let expected = Some(format!("via {} ", Color::Red.dimmed().paint("☕ v13.0.2")));
         assert_eq!(expected, actual);
         dir.close()
@@ -226,7 +226,7 @@ mod tests {
     fn folder_with_sbt_build_file() -> io::Result<()> {
         let dir = tempfile::tempdir()?;
         File::create(dir.path().join("build.gradle.kts"))?.sync_all()?;
-        let actual = render_module("java", dir.path(), None);
+        let actual = ModuleRenderer::new("java").path(dir.path()).collect();
         let expected = Some(format!("via {} ", Color::Red.dimmed().paint("☕ v13.0.2")));
         assert_eq!(expected, actual);
         dir.close()
@@ -236,7 +236,7 @@ mod tests {
     fn folder_with_java_version_file() -> io::Result<()> {
         let dir = tempfile::tempdir()?;
         File::create(dir.path().join(".java-version"))?.sync_all()?;
-        let actual = render_module("java", dir.path(), None);
+        let actual = ModuleRenderer::new("java").path(dir.path()).collect();
         let expected = Some(format!("via {} ", Color::Red.dimmed().paint("☕ v13.0.2")));
         assert_eq!(expected, actual);
         dir.close()

src/modules/jobs.rs

@@ -52,3 +52,67 @@ pub fn module<'a>(context: &'a Context) -> Option<Module<'a>> {
 
     Some(module)
 }
+
+#[cfg(test)]
+mod test {
+    use crate::test::ModuleRenderer;
+    use ansi_term::Color;
+    use std::io;
+
+    #[test]
+    fn config_blank_job_0() -> io::Result<()> {
+        let actual = ModuleRenderer::new("jobs").jobs(0).collect();
+
+        let expected = None;
+        assert_eq!(expected, actual);
+        Ok(())
+    }
+
+    #[test]
+    fn config_blank_job_1() -> io::Result<()> {
+        let actual = ModuleRenderer::new("jobs").jobs(1).collect();
+
+        let expected = Some(format!("{} ", Color::Blue.bold().paint("✦")));
+        assert_eq!(expected, actual);
+        Ok(())
+    }
+
+    #[test]
+    fn config_blank_job_2() -> io::Result<()> {
+        let actual = ModuleRenderer::new("jobs").jobs(2).collect();
+
+        let expected = Some(format!("{} ", Color::Blue.bold().paint("✦2")));
+        assert_eq!(expected, actual);
+        Ok(())
+    }
+
+    #[test]
+    fn config_2_job_2() -> io::Result<()> {
+        let actual = ModuleRenderer::new("jobs")
+            .config(toml::toml! {
+                [jobs]
+                threshold = 2
+            })
+            .jobs(2)
+            .collect();
+
+        let expected = Some(format!("{} ", Color::Blue.bold().paint("✦")));
+        assert_eq!(expected, actual);
+        Ok(())
+    }
+
+    #[test]
+    fn config_2_job_3() -> io::Result<()> {
+        let actual = ModuleRenderer::new("jobs")
+            .config(toml::toml! {
+                [jobs]
+                threshold = 2
+            })
+            .jobs(3)
+            .collect();
+
+        let expected = Some(format!("{} ", Color::Blue.bold().paint("✦3")));
+        assert_eq!(expected, actual);
+        Ok(())
+    }
+}

src/modules/julia.rs

@@ -72,7 +72,7 @@ fn format_julia_version(julia_stdout: &str) -> Option<String> {
 #[cfg(test)]
 mod tests {
     use super::*;
-    use crate::modules::utils::test::render_module;
+    use crate::test::ModuleRenderer;
     use ansi_term::Color;
     use std::fs::File;
     use std::io;
@@ -81,7 +81,7 @@ mod tests {
     fn folder_without_julia_file() -> io::Result<()> {
         let dir = tempfile::tempdir()?;
 
-        let actual = render_module("julia", dir.path(), None);
+        let actual = ModuleRenderer::new("julia").path(dir.path()).collect();
 
         let expected = None;
         assert_eq!(expected, actual);
@@ -93,7 +93,7 @@ mod tests {
         let dir = tempfile::tempdir()?;
         File::create(dir.path().join("hello.jl"))?.sync_all()?;
 
-        let actual = render_module("julia", dir.path(), None);
+        let actual = ModuleRenderer::new("julia").path(dir.path()).collect();
 
         let expected = Some(format!("via {} ", Color::Purple.bold().paint("ஃ v1.4.0")));
         assert_eq!(expected, actual);
@@ -105,7 +105,7 @@ mod tests {
         let dir = tempfile::tempdir()?;
         File::create(dir.path().join("Project.toml"))?.sync_all()?;
 
-        let actual = render_module("julia", dir.path(), None);
+        let actual = ModuleRenderer::new("julia").path(dir.path()).collect();
 
         let expected = Some(format!("via {} ", Color::Purple.bold().paint("ஃ v1.4.0")));
         assert_eq!(expected, actual);
@@ -117,7 +117,7 @@ mod tests {
         let dir = tempfile::tempdir()?;
         File::create(dir.path().join("Manifest.toml"))?.sync_all()?;
 
-        let actual = render_module("julia", dir.path(), None);
+        let actual = ModuleRenderer::new("julia").path(dir.path()).collect();
 
         let expected = Some(format!("via {} ", Color::Purple.bold().paint("ஃ v1.4.0")));
         assert_eq!(expected, actual);

src/modules/kubernetes.rs

@@ -42,11 +42,11 @@ fn parse_kubectl_file(filename: &path::PathBuf) -> Option<(String, String)> {
 }
 
 pub fn module<'a>(context: &'a Context) -> Option<Module<'a>> {
-    let kube_cfg = match env::var("KUBECONFIG") {
-        Ok(paths) => env::split_paths(&paths)
+    let kube_cfg = match context.get_env("KUBECONFIG") {
+        Some(paths) => env::split_paths(&paths)
             .filter_map(|filename| parse_kubectl_file(&filename))
             .next(),
-        Err(_) => {
+        None => {
             let filename = dirs_next::home_dir()?.join(".kube").join("config");
             parse_kubectl_file(&filename)
         }

src/modules/nim.rs

@@ -68,7 +68,7 @@ fn parse_nim_version(version_cmd_output: &str) -> Option<&str> {
 #[cfg(test)]
 mod tests {
     use super::parse_nim_version;
-    use crate::modules::utils::test::render_module;
+    use crate::test::ModuleRenderer;
     use ansi_term::Color;
     use std::fs::File;
     use std::io;
@@ -100,7 +100,7 @@ mod tests {
     fn folder_without_nim() -> io::Result<()> {
         let dir = tempfile::tempdir()?;
         File::create(dir.path().join("nim.txt"))?.sync_all()?;
-        let actual = render_module("nim", dir.path(), None);
+        let actual = ModuleRenderer::new("nim").path(dir.path()).collect();
         let expected = None;
         assert_eq!(expected, actual);
         dir.close()
@@ -110,7 +110,7 @@ mod tests {
     fn folder_with_nimble_file() -> io::Result<()> {
         let dir = tempfile::tempdir()?;
         File::create(dir.path().join("main.nimble"))?.sync_all()?;
-        let actual = render_module("nim", dir.path(), None);
+        let actual = ModuleRenderer::new("nim").path(dir.path()).collect();
         let expected = Some(format!("via {} ", Color::Yellow.bold().paint("👑 v1.2.0")));
         assert_eq!(expected, actual);
         dir.close()
@@ -120,7 +120,7 @@ mod tests {
     fn folder_with_nim_file() -> io::Result<()> {
         let dir = tempfile::tempdir()?;
         File::create(dir.path().join("main.nim"))?.sync_all()?;
-        let actual = render_module("nim", dir.path(), None);
+        let actual = ModuleRenderer::new("nim").path(dir.path()).collect();
         let expected = Some(format!("via {} ", Color::Yellow.bold().paint("👑 v1.2.0")));
         assert_eq!(expected, actual);
         dir.close()
@@ -130,7 +130,7 @@ mod tests {
     fn folder_with_nims_file() -> io::Result<()> {
         let dir = tempfile::tempdir()?;
         File::create(dir.path().join("main.nims"))?.sync_all()?;
-        let actual = render_module("nim", dir.path(), None);
+        let actual = ModuleRenderer::new("nim").path(dir.path()).collect();
         let expected = Some(format!("via {} ", Color::Yellow.bold().paint("👑 v1.2.0")));
         assert_eq!(expected, actual);
         dir.close()
@@ -140,7 +140,7 @@ mod tests {
     fn folder_with_cfg_file() -> io::Result<()> {
         let dir = tempfile::tempdir()?;
         File::create(dir.path().join("cfg.nim"))?.sync_all()?;
-        let actual = render_module("nim", dir.path(), None);
+        let actual = ModuleRenderer::new("nim").path(dir.path()).collect();
         let expected = Some(format!("via {} ", Color::Yellow.bold().paint("👑 v1.2.0")));
         assert_eq!(expected, actual);
         dir.close()

src/modules/nix_shell.rs

@@ -1,5 +1,3 @@
-use std::env;
-
 use super::{Context, Module, RootModuleConfig};
 
 use crate::configs::nix_shell::NixShellConfig;
@@ -23,8 +21,8 @@ pub fn module<'a>(context: &'a Context) -> Option<Module<'a>> {
     let mut module = context.new_module("nix_shell");
     let config: NixShellConfig = NixShellConfig::try_load(module.config);
 
-    let shell_name = env::var("name").ok();
-    let shell_type = env::var("IN_NIX_SHELL").ok()?;
+    let shell_name = context.get_env("name");
+    let shell_type = context.get_env("IN_NIX_SHELL")?;
     let shell_type_format = match shell_type.as_ref() {
         "impure" => config.impure_msg,
         "pure" => config.pure_msg,
@@ -61,3 +59,82 @@ pub fn module<'a>(context: &'a Context) -> Option<Module<'a>> {
 
     Some(module)
 }
+
+#[cfg(test)]
+mod tests {
+    use crate::test::ModuleRenderer;
+    use ansi_term::Color;
+    use std::io;
+
+    #[test]
+    fn no_env_variables() -> io::Result<()> {
+        let actual = ModuleRenderer::new("nix_shell").collect();
+        let expected = None;
+
+        assert_eq!(expected, actual);
+        Ok(())
+    }
+
+    #[test]
+    fn invalid_env_variables() -> io::Result<()> {
+        let actual = ModuleRenderer::new("nix_shell")
+            .env("IN_NIX_SHELL", "something_wrong")
+            .collect();
+        let expected = None;
+
+        assert_eq!(expected, actual);
+        Ok(())
+    }
+
+    #[test]
+    fn pure_shell() -> io::Result<()> {
+        let actual = ModuleRenderer::new("nix_shell")
+            .env("IN_NIX_SHELL", "pure")
+            .collect();
+        let expected = Some(format!("via {} ", Color::Blue.bold().paint("❄️  pure")));
+
+        assert_eq!(expected, actual);
+        Ok(())
+    }
+
+    #[test]
+    fn impure_shell() -> io::Result<()> {
+        let actual = ModuleRenderer::new("nix_shell")
+            .env("IN_NIX_SHELL", "impure")
+            .collect();
+        let expected = Some(format!("via {} ", Color::Blue.bold().paint("❄️  impure")));
+
+        assert_eq!(expected, actual);
+        Ok(())
+    }
+
+    #[test]
+    fn pure_shell_name() -> io::Result<()> {
+        let actual = ModuleRenderer::new("nix_shell")
+            .env("IN_NIX_SHELL", "pure")
+            .env("name", "starship")
+            .collect();
+        let expected = Some(format!(
+            "via {} ",
+            Color::Blue.bold().paint("❄️  pure (starship)")
+        ));
+
+        assert_eq!(expected, actual);
+        Ok(())
+    }
+
+    #[test]
+    fn impure_shell_name() -> io::Result<()> {
+        let actual = ModuleRenderer::new("nix_shell")
+            .env("IN_NIX_SHELL", "impure")
+            .env("name", "starship")
+            .collect();
+        let expected = Some(format!(
+            "via {} ",
+            Color::Blue.bold().paint("❄️  impure (starship)")
+        ));
+
+        assert_eq!(expected, actual);
+        Ok(())
+    }
+}

src/modules/nodejs.rs

@@ -61,7 +61,7 @@ pub fn module<'a>(context: &'a Context) -> Option<Module<'a>> {
 
 #[cfg(test)]
 mod tests {
-    use crate::modules::utils::test::render_module;
+    use crate::test::ModuleRenderer;
     use ansi_term::Color;
     use std::fs::{self, File};
     use std::io;
@@ -69,7 +69,7 @@ mod tests {
     #[test]
     fn folder_without_node_files() -> io::Result<()> {
         let dir = tempfile::tempdir()?;
-        let actual = render_module("nodejs", dir.path(), None);
+        let actual = ModuleRenderer::new("nodejs").path(dir.path()).collect();
         let expected = None;
         assert_eq!(expected, actual);
         dir.close()
@@ -80,7 +80,7 @@ mod tests {
         let dir = tempfile::tempdir()?;
         File::create(dir.path().join("package.json"))?.sync_all()?;
 
-        let actual = render_module("nodejs", dir.path(), None);
+        let actual = ModuleRenderer::new("nodejs").path(dir.path()).collect();
         let expected = Some(format!("via {} ", Color::Green.bold().paint("⬢ v12.0.0")));
         assert_eq!(expected, actual);
         dir.close()
@@ -93,7 +93,7 @@ mod tests {
         let esy_lock = dir.path().join("esy.lock");
         fs::create_dir_all(&esy_lock)?;
 
-        let actual = render_module("nodejs", dir.path(), None);
+        let actual = ModuleRenderer::new("nodejs").path(dir.path()).collect();
         let expected = None;
         assert_eq!(expected, actual);
         dir.close()
@@ -104,7 +104,7 @@ mod tests {
         let dir = tempfile::tempdir()?;
         File::create(dir.path().join(".node-version"))?.sync_all()?;
 
-        let actual = render_module("nodejs", dir.path(), None);
+        let actual = ModuleRenderer::new("nodejs").path(dir.path()).collect();
         let expected = Some(format!("via {} ", Color::Green.bold().paint("⬢ v12.0.0")));
         assert_eq!(expected, actual);
         dir.close()
@@ -115,7 +115,7 @@ mod tests {
         let dir = tempfile::tempdir()?;
         File::create(dir.path().join("index.js"))?.sync_all()?;
 
-        let actual = render_module("nodejs", dir.path(), None);
+        let actual = ModuleRenderer::new("nodejs").path(dir.path()).collect();
         let expected = Some(format!("via {} ", Color::Green.bold().paint("⬢ v12.0.0")));
         assert_eq!(expected, actual);
         dir.close()
@@ -126,7 +126,7 @@ mod tests {
         let dir = tempfile::tempdir()?;
         File::create(dir.path().join("index.mjs"))?.sync_all()?;
 
-        let actual = render_module("nodejs", dir.path(), None);
+        let actual = ModuleRenderer::new("nodejs").path(dir.path()).collect();
         let expected = Some(format!("via {} ", Color::Green.bold().paint("⬢ v12.0.0")));
         assert_eq!(expected, actual);
         dir.close()
@@ -137,7 +137,7 @@ mod tests {
         let dir = tempfile::tempdir()?;
         File::create(dir.path().join("index.cjs"))?.sync_all()?;
 
-        let actual = render_module("nodejs", dir.path(), None);
+        let actual = ModuleRenderer::new("nodejs").path(dir.path()).collect();
         let expected = Some(format!("via {} ", Color::Green.bold().paint("⬢ v12.0.0")));
         assert_eq!(expected, actual);
         dir.close()
@@ -148,7 +148,7 @@ mod tests {
         let dir = tempfile::tempdir()?;
         File::create(dir.path().join("index.ts"))?.sync_all()?;
 
-        let actual = render_module("nodejs", dir.path(), None);
+        let actual = ModuleRenderer::new("nodejs").path(dir.path()).collect();
         let expected = Some(format!("via {} ", Color::Green.bold().paint("⬢ v12.0.0")));
         assert_eq!(expected, actual);
         dir.close()
@@ -160,7 +160,7 @@ mod tests {
         let node_modules = dir.path().join("node_modules");
         fs::create_dir_all(&node_modules)?;
 
-        let actual = render_module("nodejs", dir.path(), None);
+        let actual = ModuleRenderer::new("nodejs").path(dir.path()).collect();
         let expected = Some(format!("via {} ", Color::Green.bold().paint("⬢ v12.0.0")));
         assert_eq!(expected, actual);
         dir.close()

src/modules/ocaml.rs

@@ -69,7 +69,7 @@ pub fn module<'a>(context: &'a Context) -> Option<Module<'a>> {
 
 #[cfg(test)]
 mod tests {
-    use crate::modules::utils::test::render_module;
+    use crate::test::ModuleRenderer;
     use ansi_term::Color;
     use std::fs::{self, File};
     use std::io;
@@ -77,7 +77,7 @@ mod tests {
     #[test]
     fn folder_without_ocaml_file() -> io::Result<()> {
         let dir = tempfile::tempdir()?;
-        let actual = render_module("ocaml", dir.path(), None);
+        let actual = ModuleRenderer::new("ocaml").path(dir.path()).collect();
         let expected = None;
         assert_eq!(expected, actual);
         dir.close()
@@ -88,7 +88,7 @@ mod tests {
         let dir = tempfile::tempdir()?;
         File::create(dir.path().join("any.opam"))?.sync_all()?;
 
-        let actual = render_module("ocaml", dir.path(), None);
+        let actual = ModuleRenderer::new("ocaml").path(dir.path()).collect();
         let expected = Some(format!("via {} ", Color::Yellow.bold().paint("🐫 v4.10.0")));
         assert_eq!(expected, actual);
         dir.close()
@@ -99,7 +99,7 @@ mod tests {
         let dir = tempfile::tempdir()?;
         fs::create_dir_all(dir.path().join("_opam"))?;
 
-        let actual = render_module("ocaml", dir.path(), None);
+        let actual = ModuleRenderer::new("ocaml").path(dir.path()).collect();
         let expected = Some(format!("via {} ", Color::Yellow.bold().paint("🐫 v4.10.0")));
         assert_eq!(expected, actual);
         dir.close()
@@ -114,7 +114,7 @@ mod tests {
             dir.path().join("package.lock"),
             "{\"dependencies\": {\"ocaml\": \"4.8.1000\"}}",
         )?;
-        let actual = render_module("ocaml", dir.path(), None);
+        let actual = ModuleRenderer::new("ocaml").path(dir.path()).collect();
         let expected = Some(format!("via {} ", Color::Yellow.bold().paint("🐫 v4.08.1")));
         assert_eq!(expected, actual);
         dir.close()
@@ -125,7 +125,7 @@ mod tests {
         let dir = tempfile::tempdir()?;
         File::create(dir.path().join("dune"))?.sync_all()?;
 
-        let actual = render_module("ocaml", dir.path(), None);
+        let actual = ModuleRenderer::new("ocaml").path(dir.path()).collect();
         let expected = Some(format!("via {} ", Color::Yellow.bold().paint("🐫 v4.10.0")));
         assert_eq!(expected, actual);
         dir.close()
@@ -136,7 +136,7 @@ mod tests {
         let dir = tempfile::tempdir()?;
         File::create(dir.path().join("dune-project"))?.sync_all()?;
 
-        let actual = render_module("ocaml", dir.path(), None);
+        let actual = ModuleRenderer::new("ocaml").path(dir.path()).collect();
         let expected = Some(format!("via {} ", Color::Yellow.bold().paint("🐫 v4.10.0")));
         assert_eq!(expected, actual);
         dir.close()
@@ -147,7 +147,7 @@ mod tests {
         let dir = tempfile::tempdir()?;
         File::create(dir.path().join("jbuild"))?.sync_all()?;
 
-        let actual = render_module("ocaml", dir.path(), None);
+        let actual = ModuleRenderer::new("ocaml").path(dir.path()).collect();
         let expected = Some(format!("via {} ", Color::Yellow.bold().paint("🐫 v4.10.0")));
         assert_eq!(expected, actual);
         dir.close()
@@ -158,7 +158,7 @@ mod tests {
         let dir = tempfile::tempdir()?;
         File::create(dir.path().join("jbuild-ignore"))?.sync_all()?;
 
-        let actual = render_module("ocaml", dir.path(), None);
+        let actual = ModuleRenderer::new("ocaml").path(dir.path()).collect();
         let expected = Some(format!("via {} ", Color::Yellow.bold().paint("🐫 v4.10.0")));
         assert_eq!(expected, actual);
         dir.close()
@@ -169,7 +169,7 @@ mod tests {
         let dir = tempfile::tempdir()?;
         File::create(dir.path().join(".merlin"))?.sync_all()?;
 
-        let actual = render_module("ocaml", dir.path(), None);
+        let actual = ModuleRenderer::new("ocaml").path(dir.path()).collect();
         let expected = Some(format!("via {} ", Color::Yellow.bold().paint("🐫 v4.10.0")));
         assert_eq!(expected, actual);
         dir.close()
@@ -180,7 +180,7 @@ mod tests {
         let dir = tempfile::tempdir()?;
         File::create(dir.path().join("any.ml"))?.sync_all()?;
 
-        let actual = render_module("ocaml", dir.path(), None);
+        let actual = ModuleRenderer::new("ocaml").path(dir.path()).collect();
         let expected = Some(format!("via {} ", Color::Yellow.bold().paint("🐫 v4.10.0")));
         assert_eq!(expected, actual);
         dir.close()
@@ -191,7 +191,7 @@ mod tests {
         let dir = tempfile::tempdir()?;
         File::create(dir.path().join("any.mli"))?.sync_all()?;
 
-        let actual = render_module("ocaml", dir.path(), None);
+        let actual = ModuleRenderer::new("ocaml").path(dir.path()).collect();
         let expected = Some(format!("via {} ", Color::Yellow.bold().paint("🐫 v4.10.0")));
         assert_eq!(expected, actual);
         dir.close()
@@ -202,7 +202,7 @@ mod tests {
         let dir = tempfile::tempdir()?;
         File::create(dir.path().join("any.re"))?.sync_all()?;
 
-        let actual = render_module("ocaml", dir.path(), None);
+        let actual = ModuleRenderer::new("ocaml").path(dir.path()).collect();
         let expected = Some(format!("via {} ", Color::Yellow.bold().paint("🐫 v4.10.0")));
         assert_eq!(expected, actual);
         dir.close()
@@ -213,7 +213,7 @@ mod tests {
         let dir = tempfile::tempdir()?;
         File::create(dir.path().join("any.rei"))?.sync_all()?;
 
-        let actual = render_module("ocaml", dir.path(), None);
+        let actual = ModuleRenderer::new("ocaml").path(dir.path()).collect();
         let expected = Some(format!("via {} ", Color::Yellow.bold().paint("🐫 v4.10.0")));
         assert_eq!(expected, actual);
         dir.close()

src/modules/package.rs

@@ -198,7 +198,7 @@ fn format_version(version: &str) -> String {
 #[cfg(test)]
 mod tests {
     use super::*;
-    use crate::modules::utils::test::render_module;
+    use crate::test::ModuleRenderer;
     use ansi_term::Color;
     use std::fs::File;
     use std::io;
@@ -741,12 +741,15 @@ end";
         contains: Option<&str>,
         config: Option<toml::Value>,
     ) -> io::Result<()> {
-        let starship_config = Some(config.unwrap_or(toml::toml! {
+        let starship_config = config.unwrap_or(toml::toml! {
             [package]
             disabled = false
-        }));
+        });
 
-        let actual = render_module("package", project_dir.path(), starship_config);
+        let actual = ModuleRenderer::new("package")
+            .path(project_dir.path())
+            .config(starship_config)
+            .collect();
         let text = String::from(contains.unwrap_or(""));
         let expected = Some(format!(
             "is {} ",

src/modules/perl.rs

@@ -64,7 +64,7 @@ pub fn module<'a>(context: &'a Context) -> Option<Module<'a>> {
 
 #[cfg(test)]
 mod tests {
-    use crate::modules::utils::test::render_module;
+    use crate::test::ModuleRenderer;
     use ansi_term::Color;
     use std::fs::File;
     use std::io;
@@ -73,7 +73,7 @@ mod tests {
     fn folder_without_perl_files() -> io::Result<()> {
         let dir = tempfile::tempdir()?;
 
-        let actual = render_module("perl", dir.path(), None);
+        let actual = ModuleRenderer::new("perl").path(dir.path()).collect();
 
         let expected = None;
         assert_eq!(expected, actual);
@@ -85,7 +85,7 @@ mod tests {
         let dir = tempfile::tempdir()?;
         File::create(dir.path().join("Makefile.PL"))?.sync_all()?;
 
-        let actual = render_module("perl", dir.path(), None);
+        let actual = ModuleRenderer::new("perl").path(dir.path()).collect();
 
         let expected = Some(format!(
             "via {} ",
@@ -100,7 +100,7 @@ mod tests {
         let dir = tempfile::tempdir()?;
         File::create(dir.path().join("Build.PL"))?.sync_all()?;
 
-        let actual = render_module("perl", dir.path(), None);
+        let actual = ModuleRenderer::new("perl").path(dir.path()).collect();
 
         let expected = Some(format!(
             "via {} ",
@@ -115,7 +115,7 @@ mod tests {
         let dir = tempfile::tempdir()?;
         File::create(dir.path().join("cpanfile"))?.sync_all()?;
 
-        let actual = render_module("perl", dir.path(), None);
+        let actual = ModuleRenderer::new("perl").path(dir.path()).collect();
 
         let expected = Some(format!(
             "via {} ",
@@ -130,7 +130,7 @@ mod tests {
         let dir = tempfile::tempdir()?;
         File::create(dir.path().join("cpanfile.snapshot"))?.sync_all()?;
 
-        let actual = render_module("perl", dir.path(), None);
+        let actual = ModuleRenderer::new("perl").path(dir.path()).collect();
 
         let expected = Some(format!(
             "via {} ",
@@ -145,7 +145,7 @@ mod tests {
         let dir = tempfile::tempdir()?;
         File::create(dir.path().join("META.json"))?.sync_all()?;
 
-        let actual = render_module("perl", dir.path(), None);
+        let actual = ModuleRenderer::new("perl").path(dir.path()).collect();
 
         let expected = Some(format!(
             "via {} ",
@@ -160,7 +160,7 @@ mod tests {
         let dir = tempfile::tempdir()?;
         File::create(dir.path().join("META.yml"))?.sync_all()?;
 
-        let actual = render_module("perl", dir.path(), None);
+        let actual = ModuleRenderer::new("perl").path(dir.path()).collect();
 
         let expected = Some(format!(
             "via {} ",
@@ -175,7 +175,7 @@ mod tests {
         let dir = tempfile::tempdir()?;
         File::create(dir.path().join(".perl-version"))?.sync_all()?;
 
-        let actual = render_module("perl", dir.path(), None);
+        let actual = ModuleRenderer::new("perl").path(dir.path()).collect();
 
         let expected = Some(format!(
             "via {} ",
@@ -190,7 +190,7 @@ mod tests {
         let dir = tempfile::tempdir()?;
         File::create(dir.path().join("any.pl"))?.sync_all()?;
 
-        let actual = render_module("perl", dir.path(), None);
+        let actual = ModuleRenderer::new("perl").path(dir.path()).collect();
 
         let expected = Some(format!(
             "via {} ",
@@ -205,7 +205,7 @@ mod tests {
         let dir = tempfile::tempdir()?;
         File::create(dir.path().join("any.pm"))?.sync_all()?;
 
-        let actual = render_module("perl", dir.path(), None);
+        let actual = ModuleRenderer::new("perl").path(dir.path()).collect();
 
         let expected = Some(format!(
             "via {} ",
@@ -220,7 +220,7 @@ mod tests {
         let dir = tempfile::tempdir()?;
         File::create(dir.path().join("any.pod"))?.sync_all()?;
 
-        let actual = render_module("perl", dir.path(), None);
+        let actual = ModuleRenderer::new("perl").path(dir.path()).collect();
 
         let expected = Some(format!(
             "via {} ",

src/modules/php.rs

@@ -72,7 +72,7 @@ fn format_php_version(php_version: &str) -> Option<String> {
 #[cfg(test)]
 mod tests {
     use super::*;
-    use crate::modules::utils::test::render_module;
+    use crate::test::ModuleRenderer;
     use ansi_term::Color;
     use std::fs::File;
     use std::io;
@@ -87,7 +87,7 @@ mod tests {
     fn folder_without_php_files() -> io::Result<()> {
         let dir = tempfile::tempdir()?;
 
-        let actual = render_module("php", dir.path(), None);
+        let actual = ModuleRenderer::new("php").path(dir.path()).collect();
 
         let expected = None;
         assert_eq!(expected, actual);
@@ -99,7 +99,7 @@ mod tests {
         let dir = tempfile::tempdir()?;
         File::create(dir.path().join("composer.json"))?.sync_all()?;
 
-        let actual = render_module("php", dir.path(), None);
+        let actual = ModuleRenderer::new("php").path(dir.path()).collect();
 
         let expected = Some(format!(
             "via {} ",
@@ -114,7 +114,7 @@ mod tests {
         let dir = tempfile::tempdir()?;
         File::create(dir.path().join(".php-version"))?.sync_all()?;
 
-        let actual = render_module("php", dir.path(), None);
+        let actual = ModuleRenderer::new("php").path(dir.path()).collect();
 
         let expected = Some(format!(
             "via {} ",
@@ -129,7 +129,7 @@ mod tests {
         let dir = tempfile::tempdir()?;
         File::create(dir.path().join("any.php"))?.sync_all()?;
 
-        let actual = render_module("php", dir.path(), None);
+        let actual = ModuleRenderer::new("php").path(dir.path()).collect();
 
         let expected = Some(format!(
             "via {} ",

src/modules/purescript.rs

@@ -55,7 +55,7 @@ pub fn module<'a>(context: &'a Context) -> Option<Module<'a>> {
 
 #[cfg(test)]
 mod tests {
-    use crate::modules::utils::test::render_module;
+    use crate::test::ModuleRenderer;
     use ansi_term::Color;
     use std::fs::File;
     use std::io;
@@ -63,7 +63,7 @@ mod tests {
     #[test]
     fn folder_without_purescript_files() -> io::Result<()> {
         let dir = tempfile::tempdir()?;
-        let actual = render_module("purescript", dir.path(), None);
+        let actual = ModuleRenderer::new("purescript").path(dir.path()).collect();
         let expected = None;
         assert_eq!(expected, actual);
         dir.close()
@@ -74,7 +74,7 @@ mod tests {
         let dir = tempfile::tempdir()?;
         File::create(dir.path().join("Main.purs"))?.sync_all()?;
 
-        let actual = render_module("purescript", dir.path(), None);
+        let actual = ModuleRenderer::new("purescript").path(dir.path()).collect();
         let expected = Some(format!("via {} ", Color::White.bold().paint("<=> v0.13.5")));
         assert_eq!(expected, actual);
         dir.close()
@@ -85,7 +85,7 @@ mod tests {
         let dir = tempfile::tempdir()?;
         File::create(dir.path().join("spago.dhall"))?.sync_all()?;
 
-        let actual = render_module("purescript", dir.path(), None);
+        let actual = ModuleRenderer::new("purescript").path(dir.path()).collect();
         let expected = Some(format!("via {} ", Color::White.bold().paint("<=> v0.13.5")));
         assert_eq!(expected, actual);
         dir.close()

src/modules/python.rs

@@ -1,4 +1,3 @@
-use std::env;
 use std::path::Path;
 
 use super::{Context, Module, RootModuleConfig};
@@ -36,7 +35,7 @@ pub fn module<'a>(context: &'a Context) -> Option<Module<'a>> {
         }
     };
 
-    let is_venv = env::var("VIRTUAL_ENV").ok().is_some();
+    let is_venv = context.get_env("VIRTUAL_ENV").is_some();
 
     if !is_py_project && !is_venv {
         return None;
@@ -48,7 +47,7 @@ pub fn module<'a>(context: &'a Context) -> Option<Module<'a>> {
         let version = get_python_version(&config.python_binary)?;
         format_python_version(&version)
     };
-    let virtual_env = get_python_virtual_env();
+    let virtual_env = get_python_virtual_env(context);
 
     let parsed = StringFormatter::new(config.format).and_then(|formatter| {
         formatter
@@ -102,8 +101,8 @@ fn format_python_version(python_stdout: &str) -> String {
     )
 }
 
-fn get_python_virtual_env() -> Option<String> {
-    env::var("VIRTUAL_ENV").ok().and_then(|venv| {
+fn get_python_virtual_env(context: &Context) -> Option<String> {
+    context.get_env("VIRTUAL_ENV").and_then(|venv| {
         Path::new(&venv)
             .file_name()
             .map(|filename| String::from(filename.to_str().unwrap_or("")))
@@ -113,7 +112,7 @@ fn get_python_virtual_env() -> Option<String> {
 #[cfg(test)]
 mod tests {
     use super::*;
-    use crate::modules::utils::test::render_module;
+    use crate::test::ModuleRenderer;
     use ansi_term::Color;
     use std::fs::File;
     use std::io;
@@ -133,7 +132,7 @@ mod tests {
     #[test]
     fn folder_without_python_files() -> io::Result<()> {
         let dir = tempfile::tempdir()?;
-        let actual = render_module("python", dir.path(), None);
+        let actual = ModuleRenderer::new("python").path(dir.path()).collect();
         let expected = None;
         assert_eq!(expected, actual);
 
@@ -230,7 +229,10 @@ mod tests {
             [python]
             scan_for_pyfiles = false
         };
-        let actual = render_module("python", dir.path(), Some(config));
+        let actual = ModuleRenderer::new("python")
+            .path(dir.path())
+            .config(config)
+            .collect();
         assert_eq!(expected, actual);
         dir.close()
     }
@@ -258,19 +260,68 @@ mod tests {
         dir.close()
     }
 
+    #[test]
+    fn with_virtual_env() -> io::Result<()> {
+        let dir = tempfile::tempdir()?;
+        File::create(dir.path().join("main.py"))?.sync_all()?;
+        let actual = ModuleRenderer::new("python")
+            .path(dir.path())
+            .env("VIRTUAL_ENV", "/foo/bar/my_venv")
+            .collect();
+
+        let expected = Some(format!(
+            "via {} ",
+            Color::Yellow.bold().paint("🐍 v2.7.17 (my_venv)")
+        ));
+
+        assert_eq!(actual, expected);
+        dir.close()
+    }
+
+    #[test]
+    fn with_active_venv() -> io::Result<()> {
+        let dir = tempfile::tempdir()?;
+
+        let actual = ModuleRenderer::new("python")
+            .path(dir.path())
+            .env("VIRTUAL_ENV", "/foo/bar/my_venv")
+            .collect();
+
+        let expected = Some(format!(
+            "via {} ",
+            Color::Yellow.bold().paint("🐍 v2.7.17 (my_venv)")
+        ));
+
+        assert_eq!(actual, expected);
+        dir.close()
+    }
+
     fn check_python2_renders(dir: &tempfile::TempDir, starship_config: Option<toml::Value>) {
-        let actual = render_module("python", dir.path(), starship_config);
+        let config = starship_config.unwrap_or(toml::toml! {
+            [python]
+            python_binary = "python"
+        });
+
+        let actual = ModuleRenderer::new("python")
+            .path(dir.path())
+            .config(config)
+            .collect();
+
         let expected = Some(format!("via {} ", Color::Yellow.bold().paint("🐍 v2.7.17")));
         assert_eq!(expected, actual);
     }
 
     fn check_python3_renders(dir: &tempfile::TempDir, starship_config: Option<toml::Value>) {
-        let config = Some(starship_config.unwrap_or(toml::toml! {
+        let config = starship_config.unwrap_or(toml::toml! {
              [python]
              python_binary = "python3"
-        }));
+        });
+
+        let actual = ModuleRenderer::new("python")
+            .path(dir.path())
+            .config(config)
+            .collect();
 
-        let actual = render_module("python", dir.path(), config);
         let expected = Some(format!("via {} ", Color::Yellow.bold().paint("🐍 v3.8.0")));
         assert_eq!(expected, actual);
     }

src/modules/ruby.rs

@@ -72,7 +72,7 @@ fn format_ruby_version(ruby_version: &str) -> Option<String> {
 #[cfg(test)]
 mod tests {
     use super::*;
-    use crate::modules::utils::test::render_module;
+    use crate::test::ModuleRenderer;
     use ansi_term::Color;
     use std::fs::File;
     use std::io;
@@ -81,7 +81,7 @@ mod tests {
     fn folder_without_ruby_files() -> io::Result<()> {
         let dir = tempfile::tempdir()?;
 
-        let actual = render_module("ruby", dir.path(), None);
+        let actual = ModuleRenderer::new("ruby").path(dir.path()).collect();
 
         let expected = None;
         assert_eq!(expected, actual);
@@ -93,7 +93,7 @@ mod tests {
         let dir = tempfile::tempdir()?;
         File::create(dir.path().join("Gemfile"))?.sync_all()?;
 
-        let actual = render_module("ruby", dir.path(), None);
+        let actual = ModuleRenderer::new("ruby").path(dir.path()).collect();
 
         let expected = Some(format!("via {} ", Color::Red.bold().paint("💎 v2.5.1")));
         assert_eq!(expected, actual);
@@ -105,7 +105,7 @@ mod tests {
         let dir = tempfile::tempdir()?;
         File::create(dir.path().join(".ruby-version"))?.sync_all()?;
 
-        let actual = render_module("ruby", dir.path(), None);
+        let actual = ModuleRenderer::new("ruby").path(dir.path()).collect();
 
         let expected = Some(format!("via {} ", Color::Red.bold().paint("💎 v2.5.1")));
         assert_eq!(expected, actual);
@@ -117,7 +117,7 @@ mod tests {
         let dir = tempfile::tempdir()?;
         File::create(dir.path().join("any.rb"))?.sync_all()?;
 
-        let actual = render_module("ruby", dir.path(), None);
+        let actual = ModuleRenderer::new("ruby").path(dir.path()).collect();
 
         let expected = Some(format!("via {} ", Color::Red.bold().paint("💎 v2.5.1")));
         assert_eq!(expected, actual);

src/modules/rust.rs

@@ -1,6 +1,6 @@
+use std::fs;
 use std::path::Path;
 use std::process::{Command, Output};
-use std::{env, fs};
 
 use super::{Context, Module, RootModuleConfig};
 
@@ -72,7 +72,7 @@ fn get_module_version(context: &Context) -> Option<String> {
     // - `rustup show`
     // - `rustup show active-toolchain`
     // - `rustup which`
-    let module_version = if let Some(toolchain) = env_rustup_toolchain()
+    let module_version = if let Some(toolchain) = env_rustup_toolchain(context)
         .or_else(|| execute_rustup_override_list(&context.current_dir))
         .or_else(|| find_rust_toolchain_file(&context))
     {
@@ -93,8 +93,8 @@ fn get_module_version(context: &Context) -> Option<String> {
     Some(module_version)
 }
 
-fn env_rustup_toolchain() -> Option<String> {
-    let val = env::var("RUSTUP_TOOLCHAIN").ok()?;
+fn env_rustup_toolchain(context: &Context) -> Option<String> {
+    let val = context.get_env("RUSTUP_TOOLCHAIN")?;
     Some(val.trim().to_owned())
 }
 

src/modules/shlvl.rs

@@ -1,5 +1,3 @@
-use std::env;
-
 use super::{Context, Module};
 
 use crate::config::RootModuleConfig;
@@ -9,7 +7,7 @@ use crate::formatter::StringFormatter;
 const SHLVL_ENV_VAR: &str = "SHLVL";
 
 pub fn module<'a>(context: &'a Context) -> Option<Module<'a>> {
-    let shlvl = get_shlvl_value()?;
+    let shlvl = context.get_env(SHLVL_ENV_VAR)?.parse::<i64>().ok()?;
 
     let mut module = context.new_module("shlvl");
     let config: ShLvlConfig = ShLvlConfig::try_load(module.config);
@@ -47,7 +45,155 @@ pub fn module<'a>(context: &'a Context) -> Option<Module<'a>> {
 
     Some(module)
 }
+#[cfg(test)]
+mod tests {
+    use ansi_term::{Color, Style};
+    use std::io;
 
-fn get_shlvl_value() -> Option<i64> {
-    env::var(SHLVL_ENV_VAR).ok()?.parse::<i64>().ok()
+    use crate::test::ModuleRenderer;
+
+    use super::SHLVL_ENV_VAR;
+
+    fn style() -> Style {
+        // default style
+        Color::Yellow.bold()
+    }
+
+    #[test]
+    fn empty_config() -> io::Result<()> {
+        let actual = ModuleRenderer::new("shlvl")
+            .config(toml::toml! {
+                [shlvl]
+            })
+            .env(SHLVL_ENV_VAR, "2")
+            .collect();
+        let expected = None;
+
+        assert_eq!(expected, actual);
+        Ok(())
+    }
+
+    #[test]
+    fn enabled() -> io::Result<()> {
+        let actual = ModuleRenderer::new("shlvl")
+            .config(toml::toml! {
+                [shlvl]
+                disabled = false
+            })
+            .env(SHLVL_ENV_VAR, "2")
+            .collect();
+        let expected = Some(format!("{} ", style().paint("↕️  2")));
+
+        assert_eq!(expected, actual);
+        Ok(())
+    }
+
+    #[test]
+    fn no_level() -> io::Result<()> {
+        let actual = ModuleRenderer::new("shlvl")
+            .config(toml::toml! {
+                [shlvl]
+                disabled = false
+            })
+            .collect();
+        let expected = None;
+
+        assert_eq!(expected, actual);
+        Ok(())
+    }
+
+    #[test]
+    fn enabled_config_level_1() -> io::Result<()> {
+        let actual = ModuleRenderer::new("shlvl")
+            .config(toml::toml! {
+                [shlvl]
+                disabled = false
+            })
+            .env(SHLVL_ENV_VAR, "1")
+            .collect();
+        let expected = None;
+
+        assert_eq!(expected, actual);
+        Ok(())
+    }
+
+    #[test]
+    fn lower_threshold() -> io::Result<()> {
+        let actual = ModuleRenderer::new("shlvl")
+            .config(toml::toml! {
+                [shlvl]
+                threshold = 1
+                disabled = false
+            })
+            .env(SHLVL_ENV_VAR, "1")
+            .collect();
+        let expected = Some(format!("{} ", style().paint("↕️  1")));
+
+        assert_eq!(expected, actual);
+        Ok(())
+    }
+
+    #[test]
+    fn higher_threshold() -> io::Result<()> {
+        let actual = ModuleRenderer::new("shlvl")
+            .config(toml::toml! {
+                [shlvl]
+                threshold = 3
+                disabled = false
+            })
+            .env(SHLVL_ENV_VAR, "1")
+            .collect();
+        let expected = None;
+
+        assert_eq!(expected, actual);
+        Ok(())
+    }
+
+    #[test]
+    fn custom_style() -> io::Result<()> {
+        let actual = ModuleRenderer::new("shlvl")
+            .config(toml::toml! {
+                [shlvl]
+                style = "Red Underline"
+                disabled = false
+            })
+            .env(SHLVL_ENV_VAR, "2")
+            .collect();
+        let expected = Some(format!("{} ", Color::Red.underline().paint("↕️  2")));
+
+        assert_eq!(expected, actual);
+        Ok(())
+    }
+
+    #[test]
+    fn custom_symbol() -> io::Result<()> {
+        let actual = ModuleRenderer::new("shlvl")
+            .config(toml::toml! {
+                [shlvl]
+                symbol = "shlvl is "
+                disabled = false
+            })
+            .env(SHLVL_ENV_VAR, "2")
+            .collect();
+        let expected = Some(format!("{} ", style().paint("shlvl is 2")));
+
+        assert_eq!(expected, actual);
+        Ok(())
+    }
+
+    #[test]
+    fn formatting() -> io::Result<()> {
+        let actual = ModuleRenderer::new("shlvl")
+            .config(toml::toml! {
+                [shlvl]
+                format = "$symbol going down [$shlvl]($style) GOING UP "
+                disabled = false
+            })
+            .env(SHLVL_ENV_VAR, "2")
+            .collect();
+        let expected = Some(format!("↕️   going down {} GOING UP ", style().paint("2")));
+
+        assert_eq!(expected, actual);
+        Ok(())
+    }
 }

src/modules/singularity.rs

@@ -1,5 +1,3 @@
-use std::env;
-
 use super::{Context, Module, RootModuleConfig};
 
 use crate::configs::singularity::SingularityConfig;
@@ -9,7 +7,7 @@ use crate::formatter::StringFormatter;
 ///
 /// Will display the Singularity image if `$SINGULARITY_NAME` is set.
 pub fn module<'a>(context: &'a Context) -> Option<Module<'a>> {
-    let singularity_env = env::var("SINGULARITY_NAME").ok();
+    let singularity_env = context.get_env("SINGULARITY_NAME");
     singularity_env.as_ref()?;
 
     let mut module = context.new_module("singularity");
@@ -42,3 +40,33 @@ pub fn module<'a>(context: &'a Context) -> Option<Module<'a>> {
 
     Some(module)
 }
+
+#[cfg(test)]
+mod tests {
+    use crate::test::ModuleRenderer;
+    use ansi_term::Color;
+    use std::io;
+
+    #[test]
+    fn no_env_set() -> io::Result<()> {
+        let actual = ModuleRenderer::new("singularity").collect();
+
+        let expected = None;
+        assert_eq!(expected, actual);
+        Ok(())
+    }
+    #[test]
+    fn env_set() -> io::Result<()> {
+        let actual = ModuleRenderer::new("singularity")
+            .env("SINGULARITY_NAME", "centos.img")
+            .collect();
+
+        let expected = Some(format!(
+            "{} ",
+            Color::Blue.bold().dimmed().paint("[centos.img]")
+        ));
+
+        assert_eq!(expected, actual);
+        Ok(())
+    }
+}

src/modules/swift.rs

@@ -65,7 +65,7 @@ fn parse_swift_version(swift_version: &str) -> Option<String> {
 #[cfg(test)]
 mod tests {
     use super::parse_swift_version;
-    use crate::modules::utils::test::render_module;
+    use crate::test::ModuleRenderer;
     use ansi_term::Color;
     use std::fs::File;
     use std::io;
@@ -80,7 +80,7 @@ mod tests {
     fn folder_without_swift_files() -> io::Result<()> {
         let dir = tempfile::tempdir()?;
         File::create(dir.path().join("swift.txt"))?.sync_all()?;
-        let actual = render_module("swift", dir.path(), None);
+        let actual = ModuleRenderer::new("swift").path(dir.path()).collect();
         let expected = None;
         assert_eq!(expected, actual);
         dir.close()
@@ -90,7 +90,7 @@ mod tests {
     fn folder_with_package_file() -> io::Result<()> {
         let dir = tempfile::tempdir()?;
         File::create(dir.path().join("Package.swift"))?.sync_all()?;
-        let actual = render_module("swift", dir.path(), None);
+        let actual = ModuleRenderer::new("swift").path(dir.path()).collect();
         let expected = Some(format!(
             "via {} ",
             Color::Fixed(202).bold().paint("🐦 v5.2.2")
@@ -103,7 +103,7 @@ mod tests {
     fn folder_with_swift_file() -> io::Result<()> {
         let dir = tempfile::tempdir()?;
         File::create(dir.path().join("main.swift"))?.sync_all()?;
-        let actual = render_module("swift", dir.path(), None);
+        let actual = ModuleRenderer::new("swift").path(dir.path()).collect();
         let expected = Some(format!(
             "via {} ",
             Color::Fixed(202).bold().paint("🐦 v5.2.2")

src/modules/terraform.rs

@@ -4,7 +4,6 @@ use crate::configs::terraform::TerraformConfig;
 use crate::formatter::StringFormatter;
 use crate::utils;
 
-use std::env;
 use std::io;
 use std::path::PathBuf;
 
@@ -42,7 +41,7 @@ pub fn module<'a>(context: &'a Context) -> Option<Module<'a>> {
                     &utils::exec_cmd("terraform", &["version"])?.stdout.as_str(),
                 )
                 .map(Ok),
-                "workspace" => get_terraform_workspace(&context.current_dir).map(Ok),
+                "workspace" => get_terraform_workspace(context).map(Ok),
                 _ => None,
             })
             .parse(None)
@@ -60,17 +59,17 @@ pub fn module<'a>(context: &'a Context) -> Option<Module<'a>> {
 }
 
 // Determines the currently selected workspace (see https://github.com/hashicorp/terraform/blob/master/command/meta.go for the original implementation)
-fn get_terraform_workspace(cwd: &PathBuf) -> Option<String> {
+fn get_terraform_workspace(context: &Context) -> Option<String> {
     // Workspace can be explicitly overwritten by an env var
-    let workspace_override = env::var("TF_WORKSPACE");
-    if workspace_override.is_ok() {
-        return workspace_override.ok();
+    let workspace_override = context.get_env("TF_WORKSPACE");
+    if workspace_override.is_some() {
+        return workspace_override;
     }
 
     // Data directory containing current workspace can be overwritten by an env var
-    let datadir = match env::var("TF_DATA_DIR") {
-        Ok(s) => PathBuf::from(s),
-        Err(_) => cwd.join(".terraform"),
+    let datadir = match context.get_env("TF_DATA_DIR") {
+        Some(s) => PathBuf::from(s),
+        None => context.current_dir.join(".terraform"),
     };
     match utils::read_file(datadir.join("environment")) {
         Err(ref e) if e.kind() == io::ErrorKind::NotFound => Some("default".to_string()),
@@ -97,10 +96,10 @@ fn format_terraform_version(version: &str) -> Option<String> {
 #[cfg(test)]
 mod tests {
     use super::*;
-    use crate::modules::utils::test::render_module;
+    use crate::test::ModuleRenderer;
     use ansi_term::Color;
     use std::fs::{self, File};
-    use std::io::Write;
+    use std::io::{self, Write};
 
     #[test]
     fn test_format_terraform_version_release() {
@@ -149,21 +148,20 @@ is 0.12.14. You can update by downloading from www.terraform.io/downloads.html
         let tf_dir = dir.path().join(".terraform");
         fs::create_dir(&tf_dir)?;
 
-        let actual = render_module(
-            "terraform",
-            dir.path(),
-            Some(toml::toml! {
+        let actual = ModuleRenderer::new("terraform")
+            .path(dir.path())
+            .config(toml::toml! {
                 [terraform]
                 format = "via [$symbol$version$workspace]($style) "
-            }),
-        );
+            })
+            .collect();
 
         let expected = Some(format!(
             "via {} ",
             Color::Fixed(105).bold().paint("💠 v0.12.14 default")
         ));
         assert_eq!(expected, actual);
-        Ok(())
+        dir.close()
     }
 
     #[test]
@@ -175,20 +173,122 @@ is 0.12.14. You can update by downloading from www.terraform.io/downloads.html
         file.write_all(b"development")?;
         file.sync_all()?;
 
-        let actual = render_module(
-            "terraform",
-            dir.path(),
-            Some(toml::toml! {
+        let actual = ModuleRenderer::new("terraform")
+            .path(dir.path())
+            .config(toml::toml! {
                 [terraform]
                 format = "via [$symbol$version$workspace]($style) "
-            }),
-        );
+            })
+            .collect();
 
         let expected = Some(format!(
             "via {} ",
             Color::Fixed(105).bold().paint("💠 v0.12.14 development")
         ));
         assert_eq!(expected, actual);
-        Ok(())
+        dir.close()
+    }
+
+    #[test]
+    fn folder_without_dotterraform() -> io::Result<()> {
+        let dir = tempfile::tempdir()?;
+
+        let actual = ModuleRenderer::new("terraform").path(dir.path()).collect();
+        let expected = None;
+
+        assert_eq!(expected, actual);
+        dir.close()
+    }
+
+    #[test]
+    fn folder_with_tf_file() -> io::Result<()> {
+        let dir = tempfile::tempdir()?;
+        File::create(dir.path().join("main.tf"))?;
+
+        let actual = ModuleRenderer::new("terraform").path(dir.path()).collect();
+        let expected = Some(format!(
+            "via {} ",
+            Color::Fixed(105).bold().paint("💠 default")
+        ));
+
+        assert_eq!(expected, actual);
+        dir.close()
+    }
+
+    #[test]
+    fn folder_with_workspace_override() -> io::Result<()> {
+        let dir = tempfile::tempdir()?;
+        File::create(dir.path().join("main.tf"))?;
+
+        let actual = ModuleRenderer::new("terraform")
+            .path(dir.path())
+            .env("TF_WORKSPACE", "development")
+            .collect();
+        let expected = Some(format!(
+            "via {} ",
+            Color::Fixed(105).bold().paint("💠 development")
+        ));
+
+        assert_eq!(expected, actual);
+        dir.close()
+    }
+
+    #[test]
+    fn folder_with_datadir_override() -> io::Result<()> {
+        let dir = tempfile::tempdir()?;
+        File::create(dir.path().join("main.tf"))?;
+
+        let datadir = tempfile::tempdir()?;
+        let mut file = File::create(datadir.path().join("environment"))?;
+        file.write_all(b"development")?;
+        file.sync_all()?;
+
+        let actual = ModuleRenderer::new("terraform")
+            .path(dir.path())
+            .env("TF_DATA_DIR", datadir.path().to_str().unwrap())
+            .collect();
+        let expected = Some(format!(
+            "via {} ",
+            Color::Fixed(105).bold().paint("💠 development")
+        ));
+
+        assert_eq!(expected, actual);
+        dir.close()?;
+        datadir.close()
+    }
+
+    #[test]
+    fn folder_with_dotterraform_no_environment() -> io::Result<()> {
+        let dir = tempfile::tempdir()?;
+        let tf_dir = dir.path().join(".terraform");
+        fs::create_dir(&tf_dir)?;
+
+        let actual = ModuleRenderer::new("terraform").path(dir.path()).collect();
+        let expected = Some(format!(
+            "via {} ",
+            Color::Fixed(105).bold().paint("💠 default")
+        ));
+
+        assert_eq!(expected, actual);
+        dir.close()
+    }
+
+    #[test]
+    fn folder_with_dotterraform_with_environment() -> io::Result<()> {
+        let dir = tempfile::tempdir()?;
+        let tf_dir = dir.path().join(".terraform");
+        fs::create_dir(&tf_dir)?;
+        let mut file = File::create(tf_dir.join("environment"))?;
+        file.write_all(b"development")?;
+        file.sync_all()?;
+
+        let actual = ModuleRenderer::new("terraform").path(dir.path()).collect();
+        let expected = Some(format!(
+            "via {} ",
+            Color::Fixed(105).bold().paint("💠 development")
+        ));
+
+        assert_eq!(expected, actual);
+        dir.close()
     }
 }

src/modules/time.rs

@@ -151,7 +151,9 @@ tests become extra important */
 #[cfg(test)]
 mod tests {
     use super::*;
+    use crate::test::ModuleRenderer;
     use chrono::offset::TimeZone;
+    use std::io;
 
     const FMT_12: &str = "%r";
     const FMT_24: &str = "%T";
@@ -464,4 +466,50 @@ mod tests {
         assert_eq!(is_inside_time_range(time_now2, time_start, time_end), false);
         assert_eq!(is_inside_time_range(time_now3, time_start, time_end), true);
     }
+
+    #[test]
+    fn config_enabled() -> io::Result<()> {
+        let actual = ModuleRenderer::new("time")
+            .config(toml::toml! {
+                [time]
+                disabled = false
+            })
+            .collect();
+
+        // We can't test what it actually is...but we can assert that it is something
+        assert!(actual.is_some());
+        Ok(())
+    }
+
+    #[test]
+    fn config_blank() -> io::Result<()> {
+        let actual = ModuleRenderer::new("time").collect();
+
+        let expected = None;
+        assert_eq!(expected, actual);
+        Ok(())
+    }
+
+    #[test]
+    fn config_check_prefix_and_suffix() -> io::Result<()> {
+        let actual = ModuleRenderer::new("time")
+            .config(toml::toml! {
+                [time]
+                disabled = false
+                format = "at [\\[$time\\]]($style) "
+                time_format = "%T"
+            })
+            .collect()
+            .unwrap();
+
+        // This is the prefix with "at ", the color code, then the prefix char [
+        let col_prefix = format!("at {}{}[", '\u{1b}', "[1;33m");
+
+        // This is the suffix with suffix char ']', then color codes, then a space
+        let col_suffix = format!("]{}{} ", '\u{1b}', "[0m");
+
+        assert!(actual.starts_with(&col_prefix));
+        assert!(actual.ends_with(&col_suffix));
+        Ok(())
+    }
 }

src/modules/username.rs

@@ -1,5 +1,3 @@
-use std::env;
-
 use super::{Context, Module, RootModuleConfig};
 
 use crate::configs::username::UsernameConfig;
@@ -13,9 +11,9 @@ use crate::utils;
 ///     - The current user is root (UID = 0)
 ///     - The user is currently connected as an SSH session (`$SSH_CONNECTION`)
 pub fn module<'a>(context: &'a Context) -> Option<Module<'a>> {
-    let user = env::var("USER").ok();
-    let logname = env::var("LOGNAME").ok();
-    let ssh_connection = env::var("SSH_CONNECTION").ok();
+    let user = context.get_env("USER");
+    let logname = context.get_env("LOGNAME");
+    let ssh_connection = context.get_env("SSH_CONNECTION");
 
     const ROOT_UID: Option<u32> = Some(0);
     let user_uid = get_uid();
@@ -64,3 +62,85 @@ fn get_uid() -> Option<u32> {
         .parse::<u32>()
         .ok()
 }
+
+#[cfg(test)]
+mod tests {
+    use crate::test::ModuleRenderer;
+    use ansi_term::Color;
+    use std::io;
+
+    // TODO: Add tests for if root user (UID == 0)
+    // Requires mocking
+
+    #[test]
+    fn no_env_variables() -> io::Result<()> {
+        let actual = ModuleRenderer::new("username").collect();
+        let expected = None;
+
+        assert_eq!(expected, actual);
+        Ok(())
+    }
+
+    #[test]
+    fn logname_equals_user() -> io::Result<()> {
+        let actual = ModuleRenderer::new("username")
+            .env("LOGNAME", "astronaut")
+            .env("USER", "astronaut")
+            .collect();
+        let expected = None;
+
+        assert_eq!(expected, actual);
+        Ok(())
+    }
+
+    #[test]
+    fn ssh_wo_username() -> io::Result<()> {
+        // SSH connection w/o username
+        let actual = ModuleRenderer::new("username")
+            .env("SSH_CONNECTION", "192.168.223.17 36673 192.168.223.229 22")
+            .collect();
+        let expected = None;
+
+        assert_eq!(expected, actual);
+        Ok(())
+    }
+
+    #[test]
+    fn current_user_not_logname() -> io::Result<()> {
+        let actual = ModuleRenderer::new("username")
+            .env("LOGNAME", "astronaut")
+            .env("USER", "cosmonaut")
+            .collect();
+        let expected = Some(format!("via {} ", Color::Yellow.bold().paint("cosmonaut")));
+
+        assert_eq!(expected, actual);
+        Ok(())
+    }
+
+    #[test]
+    fn ssh_connection() -> io::Result<()> {
+        let actual = ModuleRenderer::new("username")
+            .env("USER", "astronaut")
+            .env("SSH_CONNECTION", "192.168.223.17 36673 192.168.223.229 22")
+            .collect();
+        let expected = Some(format!("via {} ", Color::Yellow.bold().paint("astronaut")));
+
+        assert_eq!(expected, actual);
+        Ok(())
+    }
+
+    #[test]
+    fn show_always() -> io::Result<()> {
+        let actual = ModuleRenderer::new("username")
+            .env("USER", "astronaut")
+            .config(toml::toml! {
+                [username]
+                show_always = true
+            })
+            .collect();
+        let expected = Some(format!("via {} ", Color::Yellow.bold().paint("astronaut")));
+
+        assert_eq!(expected, actual);
+        Ok(())
+    }
+}

src/modules/utils/mod.rs

@@ -5,6 +5,3 @@ pub mod directory_win;
 
 #[cfg(not(target_os = "windows"))]
 pub mod directory_nix;
-
-#[cfg(test)]
-pub mod test;

src/modules/utils/test.rs

@@ -1,16 +0,0 @@
-use crate::config::StarshipConfig;
-use crate::context::{Context, Shell};
-use std::path::Path;
-
-/// Render a specific starship module by name
-pub fn render_module(
-    module_name: &str,
-    path: &Path,
-    config: Option<toml::Value>,
-) -> Option<String> {
-    let mut context = Context::new_with_dir(clap::ArgMatches::default(), path);
-    context.config = StarshipConfig { config };
-    context.shell = Shell::Unknown;
-
-    crate::print::get_module(module_name, context)
-}

src/modules/zig.rs

@@ -57,7 +57,7 @@ pub fn module<'a>(context: &'a Context) -> Option<Module<'a>> {
 
 #[cfg(test)]
 mod tests {
-    use crate::modules::utils::test::render_module;
+    use crate::test::ModuleRenderer;
     use ansi_term::Color;
     use std::fs::File;
     use std::io;
@@ -66,7 +66,7 @@ mod tests {
     fn folder_without_zig() -> io::Result<()> {
         let dir = tempfile::tempdir()?;
         File::create(dir.path().join("zig.txt"))?.sync_all()?;
-        let actual = render_module("zig", dir.path(), None);
+        let actual = ModuleRenderer::new("zig").path(dir.path()).collect();
         let expected = None;
         assert_eq!(expected, actual);
         dir.close()
@@ -76,7 +76,7 @@ mod tests {
     fn folder_with_zig_file() -> io::Result<()> {
         let dir = tempfile::tempdir()?;
         File::create(dir.path().join("main.zig"))?.sync_all()?;
-        let actual = render_module("zig", dir.path(), None);
+        let actual = ModuleRenderer::new("zig").path(dir.path()).collect();
         let expected = Some(format!("via {} ", Color::Yellow.bold().paint("↯ v0.6.0")));
         assert_eq!(expected, actual);
         dir.close()

src/test/mod.rs

@@ -0,0 +1,138 @@
+use crate::config::StarshipConfig;
+use crate::context::{Context, Shell};
+use once_cell::sync::Lazy;
+use std::io;
+use std::path::PathBuf;
+use std::process::Command;
+use tempfile::TempDir;
+
+static FIXTURE_DIR: Lazy<PathBuf> =
+    Lazy::new(|| PathBuf::from(env!("CARGO_MANIFEST_DIR")).join("src/test/fixtures/"));
+
+static GIT_FIXTURE: Lazy<PathBuf> = Lazy::new(|| FIXTURE_DIR.join("git-repo.bundle"));
+static HG_FIXTURE: Lazy<PathBuf> = Lazy::new(|| FIXTURE_DIR.join("hg-repo.bundle"));
+
+/// Render a specific starship module by name
+pub struct ModuleRenderer<'a> {
+    name: &'a str,
+    context: Context<'a>,
+}
+
+impl<'a> ModuleRenderer<'a> {
+    /// Creates a new ModuleRenderer
+    pub fn new(name: &'a str) -> Self {
+        let mut context = Context::new_with_dir(clap::ArgMatches::default(), PathBuf::new());
+        context.shell = Shell::Unknown;
+        context.config = StarshipConfig { config: None };
+
+        Self { name, context }
+    }
+
+    pub fn path<T>(mut self, path: T) -> Self
+    where
+        T: Into<PathBuf>,
+    {
+        self.context.current_dir = path.into();
+        self
+    }
+
+    /// Sets the config of the underlying context
+    pub fn config(mut self, config: toml::Value) -> Self {
+        self.context.config = StarshipConfig {
+            config: Some(config),
+        };
+        self
+    }
+
+    /// Adds the variable to the env_mocks of the underlying context
+    pub fn env<V: Into<String>>(mut self, key: &'a str, val: V) -> Self {
+        self.context.env.insert(key, val.into());
+        self
+    }
+
+    pub fn shell(mut self, shell: Shell) -> Self {
+        self.context.shell = shell;
+        self
+    }
+
+    pub fn jobs(mut self, jobs: u64) -> Self {
+        self.context.properties.insert("jobs", jobs.to_string());
+        self
+    }
+
+    pub fn cmd_duration(mut self, duration: u64) -> Self {
+        self.context
+            .properties
+            .insert("cmd_duration", duration.to_string());
+        self
+    }
+
+    pub fn keymap<T>(mut self, keymap: T) -> Self
+    where
+        T: Into<String>,
+    {
+        self.context.properties.insert("keymap", keymap.into());
+        self
+    }
+
+    pub fn status(mut self, status: i32) -> Self {
+        self.context
+            .properties
+            .insert("status_code", status.to_string());
+        self
+    }
+
+    /// Renders the module returning its output
+    pub fn collect(self) -> Option<String> {
+        crate::print::get_module(self.name, self.context)
+    }
+}
+
+pub enum FixtureProvider {
+    GIT,
+    HG,
+}
+
+pub fn fixture_repo(provider: FixtureProvider) -> io::Result<TempDir> {
+    match provider {
+        FixtureProvider::GIT => {
+            let path = tempfile::tempdir()?;
+
+            Command::new("git")
+                .current_dir(path.path())
+                .args(&["clone", "-b", "master"])
+                .arg(GIT_FIXTURE.as_os_str())
+                .arg(&path.path())
+                .output()?;
+
+            Command::new("git")
+                .args(&["config", "--local", "user.email", "starship@example.com"])
+                .current_dir(&path.path())
+                .output()?;
+
+            Command::new("git")
+                .args(&["config", "--local", "user.name", "starship"])
+                .current_dir(&path.path())
+                .output()?;
+
+            Command::new("git")
+                .args(&["reset", "--hard", "HEAD"])
+                .current_dir(&path.path())
+                .output()?;
+
+            Ok(path)
+        }
+        FixtureProvider::HG => {
+            let path = tempfile::tempdir()?;
+
+            Command::new("hg")
+                .current_dir(path.path())
+                .arg("clone")
+                .arg(HG_FIXTURE.as_os_str())
+                .arg(&path.path())
+                .output()?;
+
+            Ok(path)
+        }
+    }
+}

src/utils.rs

@@ -26,7 +26,7 @@ impl PartialEq for CommandOutput {
     }
 }
 
-/// Execute a command and return the output on stdout and stderr if sucessful
+/// Execute a command and return the output on stdout and stderr if successful
 #[cfg(not(test))]
 pub fn exec_cmd(cmd: &str, args: &[&str]) -> Option<CommandOutput> {
     internal_exec_cmd(&cmd, &args)
@@ -158,6 +158,14 @@ CMake suite maintained and supported by Kitware (kitware.com/cmake).\n",
             ),
             stderr: String::default(),
         }),
+        "dotnet --version" => Some(CommandOutput {
+            stdout: String::from("3.1.103"),
+            stderr: String::default(),
+        }),
+        "dotnet --list-sdks" => Some(CommandOutput {
+            stdout: String::from("3.1.103 [/usr/share/dotnet/sdk]"),
+            stderr: String::default(),
+        }),
         "terraform version" => Some(CommandOutput {
             stdout: String::from("Terraform v0.12.14\n"),
             stderr: String::default(),

tests/testsuite/aws.rs

@@ -1,250 +0,0 @@
-use std::fs::File;
-use std::io::{self, Write};
-
-use ansi_term::Color;
-
-use crate::common::{self, TestCommand};
-
-#[test]
-#[ignore]
-fn no_region_set() -> io::Result<()> {
-    let output = common::render_module("aws")
-        .env("PATH", env!("PATH"))
-        .output()?;
-    let expected = "";
-    let actual = String::from_utf8(output.stdout).unwrap();
-    assert_eq!(expected, actual);
-    Ok(())
-}
-
-#[test]
-fn region_set() -> io::Result<()> {
-    let output = common::render_module("aws")
-        .env("AWS_REGION", "ap-northeast-2")
-        .output()?;
-    let expected = format!("on {} ", Color::Yellow.bold().paint("☁️  (ap-northeast-2)"));
-    let actual = String::from_utf8(output.stdout).unwrap();
-    assert_eq!(expected, actual);
-    Ok(())
-}
-
-#[test]
-fn region_set_with_alias() -> io::Result<()> {
-    let output = common::render_module("aws")
-        .env("AWS_REGION", "ap-southeast-2")
-        .use_config(toml::toml! {
-            [aws.region_aliases]
-            ap-southeast-2 = "au"
-        })
-        .output()?;
-    let expected = format!("on {} ", Color::Yellow.bold().paint("☁️  (au)"));
-    let actual = String::from_utf8(output.stdout).unwrap();
-    assert_eq!(expected, actual);
-    Ok(())
-}
-
-#[test]
-fn default_region_set() -> io::Result<()> {
-    let output = common::render_module("aws")
-        .env("AWS_REGION", "ap-northeast-2")
-        .env("AWS_DEFAULT_REGION", "ap-northeast-1")
-        .output()?;
-    let expected = format!("on {} ", Color::Yellow.bold().paint("☁️  (ap-northeast-1)"));
-    let actual = String::from_utf8(output.stdout).unwrap();
-    assert_eq!(expected, actual);
-    Ok(())
-}
-
-#[test]
-fn profile_set() -> io::Result<()> {
-    let output = common::render_module("aws")
-        .env("AWS_PROFILE", "astronauts")
-        .output()?;
-    let expected = format!("on {} ", Color::Yellow.bold().paint("☁️  astronauts"));
-    let actual = String::from_utf8(output.stdout).unwrap();
-    assert_eq!(expected, actual);
-    Ok(())
-}
-
-#[test]
-fn profile_set_from_aws_vault() -> io::Result<()> {
-    let output = common::render_module("aws")
-        .env("AWS_VAULT", "astronauts-vault")
-        .env("AWS_PROFILE", "astronauts-profile")
-        .output()?;
-    let expected = format!("on {} ", Color::Yellow.bold().paint("☁️  astronauts-vault"));
-    let actual = String::from_utf8(output.stdout).unwrap();
-    assert_eq!(expected, actual);
-    Ok(())
-}
-
-#[test]
-fn profile_and_region_set() -> io::Result<()> {
-    let output = common::render_module("aws")
-        .env("AWS_PROFILE", "astronauts")
-        .env("AWS_REGION", "ap-northeast-2")
-        .output()?;
-    let expected = format!(
-        "on {} ",
-        Color::Yellow.bold().paint("☁️  astronauts(ap-northeast-2)")
-    );
-    let actual = String::from_utf8(output.stdout).unwrap();
-    assert_eq!(expected, actual);
-    Ok(())
-}
-
-#[test]
-fn default_profile_set() -> io::Result<()> {
-    let dir = tempfile::tempdir()?;
-    let config_path = dir.path().join("config");
-    let mut file = File::create(&config_path)?;
-
-    file.write_all(
-        "[default]
-region = us-east-1
-
-[profile astronauts]
-region = us-east-2
-"
-        .as_bytes(),
-    )?;
-
-    let output = common::render_module("aws")
-        .env("AWS_CONFIG_FILE", config_path.to_string_lossy().as_ref())
-        .output()?;
-    let expected = format!("on {} ", Color::Yellow.bold().paint("☁️  (us-east-1)"));
-    let actual = String::from_utf8(output.stdout).unwrap();
-    assert_eq!(expected, actual);
-    dir.close()
-}
-
-#[test]
-fn profile_and_config_set() -> io::Result<()> {
-    let dir = tempfile::tempdir()?;
-    let config_path = dir.path().join("config");
-    let mut file = File::create(&config_path)?;
-
-    file.write_all(
-        "[default]
-region = us-east-1
-
-[profile astronauts]
-region = us-east-2
-"
-        .as_bytes(),
-    )?;
-
-    let output = common::render_module("aws")
-        .env("AWS_CONFIG_FILE", config_path.to_string_lossy().as_ref())
-        .env("AWS_PROFILE", "astronauts")
-        .use_config(toml::toml! {
-            [aws]
-        })
-        .output()?;
-    let expected = format!(
-        "on {} ",
-        Color::Yellow.bold().paint("☁️  astronauts(us-east-2)")
-    );
-    let actual = String::from_utf8(output.stdout).unwrap();
-    assert_eq!(expected, actual);
-    dir.close()
-}
-
-#[test]
-fn profile_and_region_set_with_display_all() -> io::Result<()> {
-    let output = common::render_module("aws")
-        .env("AWS_PROFILE", "astronauts")
-        .env("AWS_REGION", "ap-northeast-1")
-        .output()?;
-    let expected = format!(
-        "on {} ",
-        Color::Yellow.bold().paint("☁️  astronauts(ap-northeast-1)")
-    );
-    let actual = String::from_utf8(output.stdout).unwrap();
-    assert_eq!(expected, actual);
-    Ok(())
-}
-
-#[test]
-fn profile_set_with_display_all() -> io::Result<()> {
-    let output = common::render_module("aws")
-        .env("AWS_PROFILE", "astronauts")
-        .output()?;
-    let expected = format!("on {} ", Color::Yellow.bold().paint("☁️  astronauts"));
-    let actual = String::from_utf8(output.stdout).unwrap();
-    assert_eq!(expected, actual);
-    Ok(())
-}
-
-#[test]
-fn region_set_with_display_all() -> io::Result<()> {
-    let output = common::render_module("aws")
-        .env("AWS_REGION", "ap-northeast-1")
-        .output()?;
-    let expected = format!("on {} ", Color::Yellow.bold().paint("☁️  (ap-northeast-1)"));
-    let actual = String::from_utf8(output.stdout).unwrap();
-    assert_eq!(expected, actual);
-    Ok(())
-}
-
-#[test]
-fn profile_and_region_set_with_display_region() -> io::Result<()> {
-    let output = common::render_module("aws")
-        .env("AWS_PROFILE", "astronauts")
-        .env("AWS_DEFAULT_REGION", "ap-northeast-1")
-        .use_config(toml::toml! {
-            [aws]
-            format = "on [$symbol$region]($style) "
-        })
-        .output()?;
-    let expected = format!("on {} ", Color::Yellow.bold().paint("☁️  ap-northeast-1"));
-    let actual = String::from_utf8(output.stdout).unwrap();
-    assert_eq!(expected, actual);
-    Ok(())
-}
-
-#[test]
-fn profile_and_region_set_with_display_profile() -> io::Result<()> {
-    let output = common::render_module("aws")
-        .env("AWS_PROFILE", "astronauts")
-        .env("AWS_REGION", "ap-northeast-1")
-        .use_config(toml::toml! {
-            [aws]
-            format = "on [$symbol$profile]($style) "
-        })
-        .output()?;
-    let expected = format!("on {} ", Color::Yellow.bold().paint("☁️  astronauts"));
-    let actual = String::from_utf8(output.stdout).unwrap();
-    assert_eq!(expected, actual);
-    Ok(())
-}
-
-#[test]
-fn region_set_with_display_profile() -> io::Result<()> {
-    let output = common::render_module("aws")
-        .env("AWS_REGION", "ap-northeast-1")
-        .use_config(toml::toml! {
-            [aws]
-            format = "on [$symbol$profile]($style) "
-        })
-        .output()?;
-    let expected = format!("on {} ", Color::Yellow.bold().paint("☁️  "));
-    let actual = String::from_utf8(output.stdout).unwrap();
-    assert_eq!(expected, actual);
-    Ok(())
-}
-
-#[test]
-#[ignore]
-fn region_not_set_with_display_region() -> io::Result<()> {
-    let output = common::render_module("aws")
-        .use_config(toml::toml! {
-            [aws]
-            format = "on [$symbol$region]($style) "
-        })
-        .output()?;
-    let expected = "";
-    let actual = String::from_utf8(output.stdout).unwrap();
-    assert_eq!(expected, actual);
-    Ok(())
-}

tests/testsuite/character.rs

@@ -1,151 +0,0 @@
-use ansi_term::Color;
-use std::io;
-
-use crate::common::{self, TestCommand};
-
-#[test]
-fn success_status() -> io::Result<()> {
-    let expected = format!("{} ", Color::Green.bold().paint("❯"));
-
-    // Status code 0
-    let output = common::render_module("character")
-        .arg("--status=0")
-        .output()?;
-    let actual = String::from_utf8(output.stdout).unwrap();
-    assert_eq!(expected, actual);
-
-    // No status code
-    let output = common::render_module("character").output()?;
-    let actual = String::from_utf8(output.stdout).unwrap();
-    assert_eq!(expected, actual);
-
-    Ok(())
-}
-
-#[test]
-fn failure_status() -> io::Result<()> {
-    let expected = format!("{} ", Color::Red.bold().paint("❯"));
-
-    let exit_values = ["1", "54321", "-5000"];
-
-    for status in exit_values.iter() {
-        let arg = format!("--status={}", status);
-        let output = common::render_module("character").arg(arg).output()?;
-        let actual = String::from_utf8(output.stdout).unwrap();
-        assert_eq!(expected, actual);
-    }
-
-    Ok(())
-}
-
-#[test]
-fn custom_symbol() -> io::Result<()> {
-    let expected_fail = format!("{} ", Color::Red.bold().paint("✖"));
-    let expected_success = format!("{} ", Color::Green.bold().paint("➜"));
-
-    let exit_values = ["1", "54321", "-5000"];
-
-    // Test failure values
-    for status in exit_values.iter() {
-        let arg = format!("--status={}", status);
-        let output = common::render_module("character")
-            .use_config(toml::toml! {
-                [character]
-                success_symbol = "[➜](bold green)"
-                error_symbol = "[✖](bold red)"
-
-            })
-            .arg(arg)
-            .output()?;
-        let actual = String::from_utf8(output.stdout).unwrap();
-        assert_eq!(expected_fail, actual);
-    }
-
-    // Test success
-    let output = common::render_module("character")
-        .use_config(toml::toml! {
-            [character]
-            success_symbol = "[➜](bold green)"
-            error_symbol = "[✖](bold red)"
-        })
-        .arg("--status=0")
-        .output()?;
-    let actual = String::from_utf8(output.stdout).unwrap();
-    assert_eq!(expected_success, actual);
-
-    Ok(())
-}
-
-#[test]
-fn zsh_keymap() -> io::Result<()> {
-    let expected_vicmd = format!("{} ", Color::Green.bold().paint("❮"));
-    let expected_specified = format!("{} ", Color::Green.bold().paint("V"));
-    let expected_other = format!("{} ", Color::Green.bold().paint("❯"));
-
-    // zle keymap is vicmd
-    let output = common::render_module("character")
-        .env("STARSHIP_SHELL", "zsh")
-        .arg("--keymap=vicmd")
-        .output()?;
-    let actual = String::from_utf8(output.stdout).unwrap();
-    assert_eq!(expected_vicmd, actual);
-
-    // specified vicmd character
-    let output = common::render_module("character")
-        .use_config(toml::toml! {
-            [character]
-            vicmd_symbol = "[V](bold green)"
-        })
-        .env("STARSHIP_SHELL", "zsh")
-        .arg("--keymap=vicmd")
-        .output()?;
-    let actual = String::from_utf8(output.stdout).unwrap();
-    assert_eq!(expected_specified, actual);
-
-    // zle keymap is other
-    let output = common::render_module("character")
-        .env("STARSHIP_SHELL", "zsh")
-        .arg("--keymap=visual")
-        .output()?;
-    let actual = String::from_utf8(output.stdout).unwrap();
-    assert_eq!(expected_other, actual);
-
-    Ok(())
-}
-
-#[test]
-fn fish_keymap() -> io::Result<()> {
-    let expected_vicmd = format!("{} ", Color::Green.bold().paint("❮"));
-    let expected_specified = format!("{} ", Color::Green.bold().paint("V"));
-    let expected_other = format!("{} ", Color::Green.bold().paint("❯"));
-
-    // fish keymap is default
-    let output = common::render_module("character")
-        .env("STARSHIP_SHELL", "fish")
-        .arg("--keymap=default")
-        .output()?;
-    let actual = String::from_utf8(output.stdout).unwrap();
-    assert_eq!(expected_vicmd, actual);
-
-    // specified vicmd character
-    let output = common::render_module("character")
-        .use_config(toml::toml! {
-            [character]
-            vicmd_symbol = "[V](bold green)"
-        })
-        .env("STARSHIP_SHELL", "fish")
-        .arg("--keymap=default")
-        .output()?;
-    let actual = String::from_utf8(output.stdout).unwrap();
-    assert_eq!(expected_specified, actual);
-
-    // fish keymap is other
-    let output = common::render_module("character")
-        .env("STARSHIP_SHELL", "fish")
-        .arg("--keymap=visual")
-        .output()?;
-    let actual = String::from_utf8(output.stdout).unwrap();
-    assert_eq!(expected_other, actual);
-
-    Ok(())
-}

tests/testsuite/cmd_duration.rs

@@ -1,92 +0,0 @@
-use ansi_term::Color;
-use std::io;
-
-use crate::common::{self, TestCommand};
-
-#[test]
-fn config_blank_duration_1s() -> io::Result<()> {
-    let output = common::render_module("cmd_duration")
-        .arg("--cmd-duration=1000")
-        .output()?;
-    let actual = String::from_utf8(output.stdout).unwrap();
-
-    let expected = "";
-    assert_eq!(expected, actual);
-    Ok(())
-}
-
-#[test]
-fn config_blank_duration_5s() -> io::Result<()> {
-    let output = common::render_module("cmd_duration")
-        .arg("--cmd-duration=5000")
-        .output()?;
-    let actual = String::from_utf8(output.stdout).unwrap();
-
-    let expected = format!("took {} ", Color::Yellow.bold().paint("5s"));
-    assert_eq!(expected, actual);
-    Ok(())
-}
-
-#[test]
-fn config_5s_duration_3s() -> io::Result<()> {
-    let output = common::render_module("cmd_duration")
-        .use_config(toml::toml! {
-            [cmd_duration]
-            min_time = 5000
-        })
-        .arg("--cmd-duration=3000")
-        .output()?;
-    let actual = String::from_utf8(output.stdout).unwrap();
-
-    let expected = "";
-    assert_eq!(expected, actual);
-    Ok(())
-}
-
-#[test]
-fn config_5s_duration_10s() -> io::Result<()> {
-    let output = common::render_module("cmd_duration")
-        .use_config(toml::toml! {
-            [cmd_duration]
-            min_time = 5000
-        })
-        .arg("--cmd-duration=10000")
-        .output()?;
-    let actual = String::from_utf8(output.stdout).unwrap();
-
-    let expected = format!("took {} ", Color::Yellow.bold().paint("10s"));
-    assert_eq!(expected, actual);
-    Ok(())
-}
-
-#[test]
-fn config_1s_duration_prefix_underwent() -> io::Result<()> {
-    let output = common::render_module("cmd_duration")
-        .use_config(toml::toml! {
-            [cmd_duration]
-            format = "underwent [$duration]($style) "
-        })
-        .arg("--cmd-duration=1000")
-        .output()?;
-    let actual = String::from_utf8(output.stdout).unwrap();
-
-    let expected = "";
-    assert_eq!(expected, actual);
-    Ok(())
-}
-
-#[test]
-fn config_5s_duration_prefix_underwent() -> io::Result<()> {
-    let output = common::render_module("cmd_duration")
-        .use_config(toml::toml! {
-            [cmd_duration]
-            format = "underwent [$duration]($style) "
-        })
-        .arg("--cmd-duration=5000")
-        .output()?;
-    let actual = String::from_utf8(output.stdout).unwrap();
-
-    let expected = format!("underwent {} ", Color::Yellow.bold().paint("5s"));
-    assert_eq!(expected, actual);
-    Ok(())
-}

tests/testsuite/common.rs

@@ -1,105 +0,0 @@
-use once_cell::sync::Lazy;
-use remove_dir_all::remove_dir_all;
-use std::io::prelude::*;
-use std::io::{Error, ErrorKind};
-use std::path::{Path, PathBuf};
-use std::process::Command;
-use std::{env, fs, io, process};
-
-static MANIFEST_DIR: Lazy<&'static Path> = Lazy::new(|| Path::new(env!("CARGO_MANIFEST_DIR")));
-static EMPTY_CONFIG: Lazy<PathBuf> = Lazy::new(|| MANIFEST_DIR.join("empty_config.toml"));
-
-#[cfg(windows)]
-const EXE_PATH: &str = "./target/debug/starship.exe";
-
-#[cfg(not(windows))]
-const EXE_PATH: &str = "./target/debug/starship";
-
-/// Render the full starship prompt
-pub fn _render_prompt() -> process::Command {
-    let mut command = process::Command::new(EXE_PATH);
-
-    command
-        .arg("prompt")
-        .env_clear()
-        .env("PATH", env!("PATH")) // Provide the $PATH variable so that external programs are runnable
-        .env("STARSHIP_CONFIG", EMPTY_CONFIG.as_os_str());
-
-    command
-}
-
-/// Render a specific starship module by name
-pub fn render_module(module_name: &str) -> process::Command {
-    let binary = fs::canonicalize(EXE_PATH).unwrap();
-    let mut command = process::Command::new(binary);
-
-    command
-        .arg("module")
-        .arg(module_name)
-        .env_clear()
-        .env("PATH", env!("PATH")) // Provide the $PATH variable so that external programs are runnable
-        .env("STARSHIP_CONFIG", EMPTY_CONFIG.as_os_str());
-
-    command
-}
-
-/// Create a repo from the fixture to be used in git module tests
-/// Please delete the returned directory manually after usage with `remove_dir_all::remove_dir_all`
-pub fn create_fixture_repo() -> io::Result<PathBuf> {
-    let fixture_repo_path = tempfile::tempdir()?.into_path();
-    let repo_path = tempfile::tempdir()?.into_path();
-    let fixture_path = env::current_dir()?.join("tests/fixtures/rocket.bundle");
-
-    let fixture_repo_dir = path_str(&fixture_repo_path)?;
-    let repo_dir = path_str(&repo_path)?;
-
-    Command::new("git")
-        .args(&["clone", "-b", "master"])
-        .args(&[&fixture_path, &repo_path])
-        .output()?;
-
-    git2::Repository::clone(&fixture_repo_dir, &repo_dir).ok();
-    remove_dir_all(fixture_repo_path)?;
-
-    Command::new("git")
-        .args(&["config", "--local", "user.email", "starship@example.com"])
-        .current_dir(&repo_path)
-        .output()?;
-
-    Command::new("git")
-        .args(&["config", "--local", "user.name", "starship"])
-        .current_dir(&repo_path)
-        .output()?;
-
-    Command::new("git")
-        .args(&["reset", "--hard", "HEAD"])
-        .current_dir(&repo_path)
-        .output()?;
-
-    Ok(repo_path)
-}
-
-fn path_str(repo_dir: &PathBuf) -> io::Result<String> {
-    repo_dir
-        .to_str()
-        .ok_or_else(|| Error::from(ErrorKind::Other))
-        .map(|i| i.replace("\\", "/"))
-}
-
-/// Extends `std::process::Command` with methods for testing
-pub trait TestCommand {
-    fn use_config(&mut self, toml: toml::value::Value) -> &mut process::Command;
-}
-
-impl TestCommand for process::Command {
-    /// Create a configuration file with the provided TOML and use it
-    fn use_config(&mut self, toml: toml::value::Value) -> &mut process::Command {
-        // Create a persistent config file in a tempdir
-        let (mut config_file, config_path) =
-            tempfile::NamedTempFile::new().unwrap().keep().unwrap();
-        write!(config_file, "{}", toml.to_string()).unwrap();
-
-        // Set that newly-created file as the config for the prompt instance
-        self.env("STARSHIP_CONFIG", config_path)
-    }
-}

tests/testsuite/conda.rs

@@ -1,58 +0,0 @@
-use ansi_term::Color;
-use std::io;
-
-use crate::common::{self, TestCommand};
-
-#[test]
-fn not_in_env() -> io::Result<()> {
-    let output = common::render_module("conda").output()?;
-
-    let expected = "";
-    let actual = String::from_utf8(output.stdout).unwrap();
-
-    assert_eq!(expected, actual);
-    Ok(())
-}
-
-#[test]
-fn ignore_base() -> io::Result<()> {
-    let output = common::render_module("conda")
-        .env("CONDA_DEFAULT_ENV", "base")
-        .use_config(toml::toml! {
-            [conda]
-            ignore_base = true
-        })
-        .output()?;
-
-    let expected = "";
-    let actual = String::from_utf8(output.stdout).unwrap();
-
-    assert_eq!(expected, actual);
-    Ok(())
-}
-
-#[test]
-fn env_set() -> io::Result<()> {
-    let output = common::render_module("conda")
-        .env("CONDA_DEFAULT_ENV", "astronauts")
-        .output()?;
-
-    let expected = format!("via {} ", Color::Green.bold().paint("🅒 astronauts"));
-    let actual = String::from_utf8(output.stdout).unwrap();
-
-    assert_eq!(expected, actual);
-    Ok(())
-}
-
-#[test]
-fn truncate() -> io::Result<()> {
-    let output = common::render_module("conda")
-        .env("CONDA_DEFAULT_ENV", "/some/really/long/and/really/annoying/path/that/shouldnt/be/displayed/fully/conda/my_env")
-        .output()?;
-
-    let expected = format!("via {} ", Color::Green.bold().paint("🅒 my_env"));
-    let actual = String::from_utf8(output.stdout).unwrap();
-
-    assert_eq!(expected, actual);
-    Ok(())
-}

tests/testsuite/configuration.rs

@@ -1,20 +0,0 @@
-use ansi_term::Color;
-use std::io;
-
-use crate::common::{self, TestCommand};
-
-#[test]
-fn char_symbol_configuration() -> io::Result<()> {
-    let expected = format!("{} ", Color::Green.bold().paint("❯"));
-
-    let output = common::render_module("character")
-        .use_config(toml::toml! {
-            [character]
-            symbol = "❯"
-        })
-        .output()?;
-    let actual = String::from_utf8(output.stdout).unwrap();
-    assert_eq!(expected, actual);
-
-    Ok(())
-}

tests/testsuite/directory.rs

@@ -1,781 +0,0 @@
-use ansi_term::Color;
-use dirs_next::home_dir;
-use git2::Repository;
-use std::fs;
-use std::io;
-#[cfg(not(target_os = "windows"))]
-use std::os::unix::fs::symlink;
-#[cfg(target_os = "windows")]
-use std::os::windows::fs::symlink_dir as symlink;
-use std::path::Path;
-use tempfile::TempDir;
-
-use crate::common::{self, TestCommand};
-
-#[test]
-fn home_directory() -> io::Result<()> {
-    let output = common::render_module("directory")
-        .arg("--path=~")
-        .use_config(toml::toml! { // Necessary if homedir is a git repo
-            [directory]
-            truncate_to_repo = false
-        })
-        .output()?;
-    let actual = String::from_utf8(output.stdout).unwrap();
-
-    let expected = format!("{} ", Color::Cyan.bold().paint("~"));
-    assert_eq!(expected, actual);
-    Ok(())
-}
-
-#[test]
-fn substituted_truncated_path() -> io::Result<()> {
-    let output = common::render_module("directory")
-        .arg("--path=/some/long/network/path/workspace/a/b/c/dev")
-        .use_config(toml::toml! {
-            [directory]
-            truncation_length = 4
-            [directory.substitutions]
-            "/some/long/network/path" = "/some/net"
-            "a/b/c" = "d"
-        })
-        .output()?;
-    let actual = String::from_utf8(output.stdout).unwrap();
-
-    let expected = format!("{} ", Color::Cyan.bold().paint("net/workspace/d/dev"));
-    assert_eq!(expected, actual);
-    Ok(())
-}
-
-#[test]
-fn strange_substitution() -> io::Result<()> {
-    let strange_sub = "/\\/;,!";
-    let output = common::render_module("directory")
-        .arg("--path=/foo/bar/regular/path")
-        .use_config(toml::toml! {
-            [directory]
-            truncation_length = 0
-            fish_style_pwd_dir_length = 2 // Overridden by substitutions
-            [directory.substitutions]
-            "regular" = strange_sub
-        })
-        .output()?;
-    let actual = String::from_utf8(output.stdout).unwrap();
-
-    let expected = format!(
-        "{} ",
-        Color::Cyan
-            .bold()
-            .paint(format!("/foo/bar/{}/path", strange_sub))
-    );
-    assert_eq!(expected, actual);
-    Ok(())
-}
-
-#[test]
-#[ignore]
-fn directory_in_home() -> io::Result<()> {
-    let dir = home_dir().unwrap().join("starship/engine");
-    fs::create_dir_all(&dir)?;
-
-    let output = common::render_module("directory")
-        .arg("--path")
-        .arg(dir)
-        .output()?;
-    let actual = String::from_utf8(output.stdout).unwrap();
-
-    let expected = format!("{} ", Color::Cyan.bold().paint("~/starship/engine"));
-    assert_eq!(expected, actual);
-    Ok(())
-}
-
-#[test]
-#[ignore]
-fn truncated_directory_in_home() -> io::Result<()> {
-    let dir = home_dir().unwrap().join("starship/engine/schematics");
-    fs::create_dir_all(&dir)?;
-
-    let output = common::render_module("directory")
-        .arg("--path")
-        .arg(dir)
-        .output()?;
-    let actual = String::from_utf8(output.stdout).unwrap();
-
-    let expected = format!(
-        "{} ",
-        Color::Cyan.bold().paint("starship/engine/schematics")
-    );
-    assert_eq!(expected, actual);
-    Ok(())
-}
-
-#[test]
-#[ignore]
-fn fish_directory_in_home() -> io::Result<()> {
-    let dir = home_dir().unwrap().join("starship/engine/schematics");
-    fs::create_dir_all(&dir)?;
-
-    let output = common::render_module("directory")
-        .use_config(toml::toml! {
-            [directory]
-            truncation_length = 1
-            fish_style_pwd_dir_length = 2
-        })
-        .arg("--path")
-        .arg(dir)
-        .output()?;
-    let actual = String::from_utf8(output.stdout).unwrap();
-
-    let expected = format!("{} ", Color::Cyan.bold().paint("~/st/en/schematics"));
-    assert_eq!(expected, actual);
-    Ok(())
-}
-
-#[test]
-fn root_directory() -> io::Result<()> {
-    let output = common::render_module("directory")
-        .arg("--path=/")
-        .output()?;
-    let actual = String::from_utf8(output.stdout).unwrap();
-
-    #[cfg(not(target_os = "windows"))]
-    let expected = format!(
-        "{}{} ",
-        Color::Cyan.bold().paint("/"),
-        Color::Red.normal().paint("🔒")
-    );
-    #[cfg(target_os = "windows")]
-    let expected = format!("{} ", Color::Cyan.bold().paint("/"),);
-    assert_eq!(expected, actual);
-    Ok(())
-}
-
-#[test]
-#[cfg(not(target_os = "windows"))]
-fn directory_in_root() -> io::Result<()> {
-    let output = common::render_module("directory")
-        .arg("--path=/etc")
-        .output()?;
-    let actual = String::from_utf8(output.stdout).unwrap();
-
-    let expected = format!(
-        "{}{} ",
-        Color::Cyan.bold().paint("/etc"),
-        Color::Red.normal().paint("🔒")
-    );
-    assert_eq!(expected, actual);
-    Ok(())
-}
-
-#[test]
-#[cfg(target_os = "windows")]
-fn directory_in_root() -> io::Result<()> {
-    let output = common::render_module("directory")
-        .arg("--path=C:\\")
-        .output()?;
-    let actual = String::from_utf8(output.stdout).unwrap();
-
-    let expected = format!("{} ", Color::Cyan.bold().paint("C:"));
-    assert_eq!(expected, actual);
-    Ok(())
-}
-
-#[test]
-#[ignore]
-fn truncated_directory_in_root() -> io::Result<()> {
-    let dir = Path::new("/tmp/starship/thrusters/rocket");
-    fs::create_dir_all(&dir)?;
-
-    let output = common::render_module("directory")
-        .arg("--path")
-        .arg(dir)
-        .output()?;
-    let actual = String::from_utf8(output.stdout).unwrap();
-
-    let expected = format!("{} ", Color::Cyan.bold().paint("starship/thrusters/rocket"));
-    assert_eq!(expected, actual);
-    Ok(())
-}
-
-#[test]
-#[ignore]
-fn truncated_directory_config_large() -> io::Result<()> {
-    let dir = Path::new("/tmp/starship/thrusters/rocket");
-    fs::create_dir_all(&dir)?;
-
-    let output = common::render_module("directory")
-        .use_config(toml::toml! {
-            [directory]
-            truncation_length = 100
-        })
-        .arg("--path")
-        .arg(dir)
-        .output()?;
-    let actual = String::from_utf8(output.stdout).unwrap();
-
-    let expected = format!(
-        "{} ",
-        Color::Cyan.bold().paint("/tmp/starship/thrusters/rocket")
-    );
-    assert_eq!(expected, actual);
-    Ok(())
-}
-
-#[test]
-#[ignore]
-fn fish_style_directory_config_large() -> io::Result<()> {
-    let dir = Path::new("/tmp/starship/thrusters/rocket");
-    fs::create_dir_all(&dir)?;
-
-    let output = common::render_module("directory")
-        .use_config(toml::toml! {
-            [directory]
-            truncation_length = 1
-            fish_style_pwd_dir_length = 100
-        })
-        .arg("--path")
-        .arg(dir)
-        .output()?;
-    let actual = String::from_utf8(output.stdout).unwrap();
-
-    let expected = format!(
-        "{} ",
-        Color::Cyan.bold().paint("/tmp/starship/thrusters/rocket")
-    );
-    assert_eq!(expected, actual);
-    Ok(())
-}
-
-#[test]
-#[ignore]
-fn truncated_directory_config_small() -> io::Result<()> {
-    let dir = Path::new("/tmp/starship/thrusters/rocket");
-    fs::create_dir_all(&dir)?;
-
-    let output = common::render_module("directory")
-        .use_config(toml::toml! {
-            [directory]
-            truncation_length = 2
-        })
-        .arg("--path")
-        .arg(dir)
-        .output()?;
-    let actual = String::from_utf8(output.stdout).unwrap();
-
-    let expected = format!("{} ", Color::Cyan.bold().paint("thrusters/rocket"));
-    assert_eq!(expected, actual);
-    Ok(())
-}
-
-#[test]
-#[ignore]
-fn fish_directory_config_small() -> io::Result<()> {
-    let dir = Path::new("/tmp/starship/thrusters/rocket");
-    fs::create_dir_all(&dir)?;
-
-    let output = common::render_module("directory")
-        .use_config(toml::toml! {
-            [directory]
-            truncation_length = 2
-            fish_style_pwd_dir_length = 1
-        })
-        .arg("--path")
-        .arg(dir)
-        .output()?;
-    let actual = String::from_utf8(output.stdout).unwrap();
-
-    let expected = format!("{} ", Color::Cyan.bold().paint("/t/s/thrusters/rocket"));
-    assert_eq!(expected, actual);
-    Ok(())
-}
-
-#[test]
-#[ignore]
-fn git_repo_root() -> io::Result<()> {
-    // TODO: Investigate why git repo related tests fail when the tempdir is within /tmp/...
-    // Temporarily making the tempdir within $HOME
-    // #[ignore] can be removed after this TODO is addressed
-    let tmp_dir = TempDir::new_in(home_dir().unwrap())?;
-    let repo_dir = tmp_dir.path().join("rocket-controls");
-    fs::create_dir(&repo_dir)?;
-    Repository::init(&repo_dir).unwrap();
-
-    let output = common::render_module("directory")
-        .arg("--path")
-        .arg(repo_dir)
-        .output()?;
-    let actual = String::from_utf8(output.stdout).unwrap();
-
-    let expected = format!("{} ", Color::Cyan.bold().paint("rocket-controls"));
-    assert_eq!(expected, actual);
-    tmp_dir.close()
-}
-
-#[test]
-#[ignore]
-fn directory_in_git_repo() -> io::Result<()> {
-    let tmp_dir = TempDir::new_in(home_dir().unwrap())?;
-    let repo_dir = tmp_dir.path().join("rocket-controls");
-    let dir = repo_dir.join("src");
-    fs::create_dir_all(&dir)?;
-    Repository::init(&repo_dir).unwrap();
-
-    let output = common::render_module("directory")
-        .arg("--path")
-        .arg(dir)
-        .output()?;
-    let actual = String::from_utf8(output.stdout).unwrap();
-
-    let expected = format!("{} ", Color::Cyan.bold().paint("rocket-controls/src"));
-    assert_eq!(expected, actual);
-    tmp_dir.close()
-}
-
-#[test]
-#[ignore]
-fn truncated_directory_in_git_repo() -> io::Result<()> {
-    let tmp_dir = TempDir::new_in(home_dir().unwrap())?;
-    let repo_dir = tmp_dir.path().join("rocket-controls");
-    let dir = repo_dir.join("src/meters/fuel-gauge");
-    fs::create_dir_all(&dir)?;
-    Repository::init(&repo_dir).unwrap();
-
-    let output = common::render_module("directory")
-        .arg("--path")
-        .arg(dir)
-        .output()?;
-    let actual = String::from_utf8(output.stdout).unwrap();
-
-    let expected = format!("{} ", Color::Cyan.bold().paint("src/meters/fuel-gauge"));
-    assert_eq!(expected, actual);
-    tmp_dir.close()
-}
-
-#[test]
-#[ignore]
-fn directory_in_git_repo_truncate_to_repo_false() -> io::Result<()> {
-    let tmp_dir = TempDir::new_in(home_dir().unwrap())?;
-    let repo_dir = tmp_dir.path().join("above-repo").join("rocket-controls");
-    let dir = repo_dir.join("src/meters/fuel-gauge");
-    fs::create_dir_all(&dir)?;
-    Repository::init(&repo_dir).unwrap();
-
-    let output = common::render_module("directory")
-        .use_config(toml::toml! {
-            [directory]
-            // Don't truncate the path at all.
-            truncation_length = 5
-            truncate_to_repo = false
-        })
-        .arg("--path")
-        .arg(dir)
-        .output()?;
-    let actual = String::from_utf8(output.stdout).unwrap();
-
-    let expected = format!(
-        "{} ",
-        Color::Cyan
-            .bold()
-            .paint("above-repo/rocket-controls/src/meters/fuel-gauge")
-    );
-    assert_eq!(expected, actual);
-    tmp_dir.close()
-}
-
-#[test]
-#[ignore]
-fn fish_path_directory_in_git_repo_truncate_to_repo_false() -> io::Result<()> {
-    let tmp_dir = TempDir::new_in(home_dir().unwrap())?;
-    let repo_dir = tmp_dir.path().join("above-repo").join("rocket-controls");
-    let dir = repo_dir.join("src/meters/fuel-gauge");
-    fs::create_dir_all(&dir)?;
-    Repository::init(&repo_dir).unwrap();
-
-    let output = common::render_module("directory")
-        .use_config(toml::toml! {
-            [directory]
-            // Don't truncate the path at all.
-            truncation_length = 5
-            truncate_to_repo = false
-            fish_style_pwd_dir_length = 1
-        })
-        .arg("--path")
-        .arg(dir)
-        .output()?;
-    let actual = String::from_utf8(output.stdout).unwrap();
-
-    let expected = format!(
-        "{} ",
-        Color::Cyan
-            .bold()
-            .paint("~/.t/above-repo/rocket-controls/src/meters/fuel-gauge")
-    );
-    assert_eq!(expected, actual);
-    tmp_dir.close()
-}
-
-#[test]
-#[ignore]
-fn fish_path_directory_in_git_repo_truncate_to_repo_true() -> io::Result<()> {
-    let tmp_dir = TempDir::new_in(home_dir().unwrap())?;
-    let repo_dir = tmp_dir.path().join("above-repo").join("rocket-controls");
-    let dir = repo_dir.join("src/meters/fuel-gauge");
-    fs::create_dir_all(&dir)?;
-    Repository::init(&repo_dir).unwrap();
-
-    let output = common::render_module("directory")
-        .use_config(toml::toml! {
-            [directory]
-            // `truncate_to_repo = true` should display the truncated path
-            truncation_length = 5
-            truncate_to_repo = true
-            fish_style_pwd_dir_length = 1
-        })
-        .arg("--path")
-        .arg(dir)
-        .output()?;
-    let actual = String::from_utf8(output.stdout).unwrap();
-
-    let expected = format!(
-        "{} ",
-        Color::Cyan
-            .bold()
-            .paint("~/.t/a/rocket-controls/src/meters/fuel-gauge")
-    );
-    assert_eq!(expected, actual);
-    tmp_dir.close()
-}
-
-#[test]
-#[ignore]
-fn directory_in_git_repo_truncate_to_repo_true() -> io::Result<()> {
-    let tmp_dir = TempDir::new_in(home_dir().unwrap())?;
-    let repo_dir = tmp_dir.path().join("above-repo").join("rocket-controls");
-    let dir = repo_dir.join("src/meters/fuel-gauge");
-    fs::create_dir_all(&dir)?;
-    Repository::init(&repo_dir).unwrap();
-
-    let output = common::render_module("directory")
-        .use_config(toml::toml! {
-            [directory]
-            // `truncate_to_repo = true` should display the truncated path
-            truncation_length = 5
-            truncate_to_repo = true
-        })
-        .arg("--path")
-        .arg(dir)
-        .output()?;
-    let actual = String::from_utf8(output.stdout).unwrap();
-
-    let expected = format!(
-        "{} ",
-        Color::Cyan
-            .bold()
-            .paint("rocket-controls/src/meters/fuel-gauge")
-    );
-    assert_eq!(expected, actual);
-    tmp_dir.close()
-}
-
-#[test]
-#[ignore]
-#[cfg(not(target_os = "windows"))]
-fn git_repo_in_home_directory_truncate_to_repo_true() -> io::Result<()> {
-    let tmp_dir = TempDir::new_in(home_dir().unwrap())?;
-    let dir = tmp_dir.path().join("src/meters/fuel-gauge");
-    fs::create_dir_all(&dir)?;
-    Repository::init(&tmp_dir).unwrap();
-
-    let output = common::render_module("directory")
-        .use_config(toml::toml! {
-            [directory]
-            // `truncate_to_repo = true` should attmpt to display the truncated path
-            truncate_to_repo = true
-            truncation_length = 5
-        })
-        // Set home directory to the temp repository
-        .env("HOME", tmp_dir.path())
-        .arg("--path")
-        .arg(dir)
-        .output()?;
-    let actual = String::from_utf8(output.stdout).unwrap();
-
-    let expected = format!("{} ", Color::Cyan.bold().paint("~/src/meters/fuel-gauge"));
-    assert_eq!(expected, actual);
-    tmp_dir.close()
-}
-
-#[test]
-#[ignore]
-fn symlinked_git_repo_root() -> io::Result<()> {
-    let tmp_dir = TempDir::new_in(home_dir().unwrap())?;
-    let repo_dir = tmp_dir.path().join("rocket-controls");
-    let symlink_dir = tmp_dir.path().join("rocket-controls-symlink");
-    fs::create_dir(&repo_dir)?;
-    Repository::init(&repo_dir).unwrap();
-    symlink(&repo_dir, &symlink_dir)?;
-
-    let output = common::render_module("directory")
-        .arg("--path")
-        .arg(symlink_dir)
-        .output()?;
-    let actual = String::from_utf8(output.stdout).unwrap();
-
-    let expected = format!("{} ", Color::Cyan.bold().paint("rocket-controls-symlink"));
-    assert_eq!(expected, actual);
-    tmp_dir.close()
-}
-
-#[test]
-#[ignore]
-fn directory_in_symlinked_git_repo() -> io::Result<()> {
-    let tmp_dir = TempDir::new_in(home_dir().unwrap())?;
-    let repo_dir = tmp_dir.path().join("rocket-controls");
-    let src_dir = repo_dir.join("src");
-    let symlink_dir = tmp_dir.path().join("rocket-controls-symlink");
-    let symlink_src_dir = symlink_dir.join("src");
-    fs::create_dir_all(&src_dir)?;
-    Repository::init(&repo_dir).unwrap();
-    symlink(&repo_dir, &symlink_dir)?;
-
-    let output = common::render_module("directory")
-        .arg("--path")
-        .arg(symlink_src_dir)
-        .output()?;
-    let actual = String::from_utf8(output.stdout).unwrap();
-
-    let expected = format!(
-        "{} ",
-        Color::Cyan.bold().paint("rocket-controls-symlink/src")
-    );
-    assert_eq!(expected, actual);
-    tmp_dir.close()
-}
-
-#[test]
-#[ignore]
-fn truncated_directory_in_symlinked_git_repo() -> io::Result<()> {
-    let tmp_dir = TempDir::new_in(home_dir().unwrap())?;
-    let repo_dir = tmp_dir.path().join("rocket-controls");
-    let src_dir = repo_dir.join("src/meters/fuel-gauge");
-    let symlink_dir = tmp_dir.path().join("rocket-controls-symlink");
-    let symlink_src_dir = symlink_dir.join("src/meters/fuel-gauge");
-    fs::create_dir_all(&src_dir)?;
-    Repository::init(&repo_dir).unwrap();
-    symlink(&repo_dir, &symlink_dir)?;
-
-    let output = common::render_module("directory")
-        .arg("--path")
-        .arg(symlink_src_dir)
-        .output()?;
-    let actual = String::from_utf8(output.stdout).unwrap();
-
-    let expected = format!("{} ", Color::Cyan.bold().paint("src/meters/fuel-gauge"));
-    assert_eq!(expected, actual);
-    tmp_dir.close()
-}
-
-#[test]
-#[ignore]
-fn directory_in_symlinked_git_repo_truncate_to_repo_false() -> io::Result<()> {
-    let tmp_dir = TempDir::new_in(home_dir().unwrap())?;
-    let repo_dir = tmp_dir.path().join("above-repo").join("rocket-controls");
-    let src_dir = repo_dir.join("src/meters/fuel-gauge");
-    let symlink_dir = tmp_dir
-        .path()
-        .join("above-repo")
-        .join("rocket-controls-symlink");
-    let symlink_src_dir = symlink_dir.join("src/meters/fuel-gauge");
-    fs::create_dir_all(&src_dir)?;
-    Repository::init(&repo_dir).unwrap();
-    symlink(&repo_dir, &symlink_dir)?;
-
-    let output = common::render_module("directory")
-        .use_config(toml::toml! {
-            [directory]
-            // Don't truncate the path at all.
-            truncation_length = 5
-            truncate_to_repo = false
-        })
-        .arg("--path")
-        .arg(symlink_src_dir)
-        .output()?;
-    let actual = String::from_utf8(output.stdout).unwrap();
-
-    let expected = format!(
-        "{} ",
-        Color::Cyan
-            .bold()
-            .paint("above-repo/rocket-controls-symlink/src/meters/fuel-gauge")
-    );
-    assert_eq!(expected, actual);
-    tmp_dir.close()
-}
-
-#[test]
-#[ignore]
-fn fish_path_directory_in_symlinked_git_repo_truncate_to_repo_false() -> io::Result<()> {
-    let tmp_dir = TempDir::new_in(home_dir().unwrap())?;
-    let repo_dir = tmp_dir.path().join("above-repo").join("rocket-controls");
-    let src_dir = repo_dir.join("src/meters/fuel-gauge");
-    let symlink_dir = tmp_dir
-        .path()
-        .join("above-repo")
-        .join("rocket-controls-symlink");
-    let symlink_src_dir = symlink_dir.join("src/meters/fuel-gauge");
-    fs::create_dir_all(&src_dir)?;
-    Repository::init(&repo_dir).unwrap();
-    symlink(&repo_dir, &symlink_dir)?;
-
-    let output = common::render_module("directory")
-        .use_config(toml::toml! {
-            [directory]
-            // Don't truncate the path at all.
-            truncation_length = 5
-            truncate_to_repo = false
-            fish_style_pwd_dir_length = 1
-        })
-        .arg("--path")
-        .arg(symlink_src_dir)
-        .output()?;
-    let actual = String::from_utf8(output.stdout).unwrap();
-
-    let expected = format!(
-        "{} ",
-        Color::Cyan
-            .bold()
-            .paint("~/.t/above-repo/rocket-controls-symlink/src/meters/fuel-gauge")
-    );
-    assert_eq!(expected, actual);
-    tmp_dir.close()
-}
-
-#[test]
-#[ignore]
-fn fish_path_directory_in_symlinked_git_repo_truncate_to_repo_true() -> io::Result<()> {
-    let tmp_dir = TempDir::new_in(home_dir().unwrap())?;
-    let repo_dir = tmp_dir.path().join("above-repo").join("rocket-controls");
-    let src_dir = repo_dir.join("src/meters/fuel-gauge");
-    let symlink_dir = tmp_dir
-        .path()
-        .join("above-repo")
-        .join("rocket-controls-symlink");
-    let symlink_src_dir = symlink_dir.join("src/meters/fuel-gauge");
-    fs::create_dir_all(&src_dir)?;
-    Repository::init(&repo_dir).unwrap();
-    symlink(&repo_dir, &symlink_dir)?;
-
-    let output = common::render_module("directory")
-        .use_config(toml::toml! {
-            [directory]
-            // `truncate_to_repo = true` should display the truncated path
-            truncation_length = 5
-            truncate_to_repo = true
-            fish_style_pwd_dir_length = 1
-        })
-        .arg("--path")
-        .arg(symlink_src_dir)
-        .output()?;
-    let actual = String::from_utf8(output.stdout).unwrap();
-
-    let expected = format!(
-        "{} ",
-        Color::Cyan
-            .bold()
-            .paint("~/.t/a/rocket-controls-symlink/src/meters/fuel-gauge")
-    );
-    assert_eq!(expected, actual);
-    tmp_dir.close()
-}
-
-#[test]
-#[ignore]
-fn directory_in_symlinked_git_repo_truncate_to_repo_true() -> io::Result<()> {
-    let tmp_dir = TempDir::new_in(home_dir().unwrap())?;
-    let repo_dir = tmp_dir.path().join("above-repo").join("rocket-controls");
-    let src_dir = repo_dir.join("src/meters/fuel-gauge");
-    let symlink_dir = tmp_dir
-        .path()
-        .join("above-repo")
-        .join("rocket-controls-symlink");
-    let symlink_src_dir = symlink_dir.join("src/meters/fuel-gauge");
-    fs::create_dir_all(&src_dir)?;
-    Repository::init(&repo_dir).unwrap();
-    symlink(&repo_dir, &symlink_dir)?;
-
-    let output = common::render_module("directory")
-        .use_config(toml::toml! {
-            [directory]
-            // `truncate_to_repo = true` should display the truncated path
-            truncation_length = 5
-            truncate_to_repo = true
-        })
-        .arg("--path")
-        .arg(symlink_src_dir)
-        .output()?;
-    let actual = String::from_utf8(output.stdout).unwrap();
-
-    let expected = format!(
-        "{} ",
-        Color::Cyan
-            .bold()
-            .paint("rocket-controls-symlink/src/meters/fuel-gauge")
-    );
-    assert_eq!(expected, actual);
-    tmp_dir.close()
-}
-
-#[test]
-#[ignore]
-fn symlinked_directory_in_git_repo() -> io::Result<()> {
-    let tmp_dir = TempDir::new_in(home_dir().unwrap())?;
-    let repo_dir = tmp_dir.path().join("rocket-controls");
-    let dir = repo_dir.join("src");
-    fs::create_dir_all(&dir)?;
-    Repository::init(&repo_dir).unwrap();
-    symlink(&dir, repo_dir.join("src/loop"))?;
-
-    let output = common::render_module("directory")
-        .use_config(toml::toml! {
-            [directory]
-            // `truncate_to_repo = true` should display the truncated path
-            truncation_length = 5
-            truncate_to_repo = true
-        })
-        .arg("--path")
-        .arg(repo_dir.join("src/loop/loop"))
-        .output()?;
-    let actual = String::from_utf8(output.stdout).unwrap();
-
-    let expected = format!(
-        "{} ",
-        Color::Cyan.bold().paint("rocket-controls/src/loop/loop")
-    );
-    assert_eq!(expected, actual);
-    tmp_dir.close()
-}
-
-#[test]
-#[ignore]
-#[cfg(not(target_os = "windows"))]
-fn symlinked_subdirectory_git_repo_out_of_tree() -> io::Result<()> {
-    let tmp_dir = TempDir::new_in(home_dir().unwrap())?;
-    let repo_dir = tmp_dir.path().join("above-repo").join("rocket-controls");
-    let src_dir = repo_dir.join("src/meters/fuel-gauge");
-    let symlink_dir = tmp_dir.path().join("fuel-gauge");
-    fs::create_dir_all(&src_dir)?;
-    Repository::init(&repo_dir).unwrap();
-    symlink(&src_dir, &symlink_dir)?;
-
-    let output = common::render_module("directory")
-        // Set home directory to the temp repository
-        .env("HOME", tmp_dir.path())
-        .arg("--path")
-        .arg(symlink_dir)
-        .output()?;
-    let actual = String::from_utf8(output.stdout).unwrap();
-
-    let expected = format!("{} ", Color::Cyan.bold().paint("~/fuel-gauge"));
-    assert_eq!(expected, actual);
-    tmp_dir.close()
-}

tests/testsuite/dotnet.rs

@@ -1,244 +0,0 @@
-use super::common;
-use regex::Regex;
-use std::fs::{DirBuilder, OpenOptions};
-use std::io::{self, Error, ErrorKind, Write};
-use std::process::{Command, Stdio};
-use tempfile::{self, TempDir};
-
-const DOTNET_OUTPUT_PATTERN: &str = "•NET v\\d+?\\.\\d+?\\.\\d?";
-const DOTNET_PINNED_VERSION: &str = "1.2.3";
-const DOTNET_PINNED_VERSION_OUTPUT_PATTERN: &str = "•NET v1\\.2\\.3";
-const DOTNET_TFM_PATTERN: &str = r"🎯 .+";
-const DOTNET_TFM_PINNED_VERSION: &str = r"netstandard2.0";
-
-#[test]
-#[ignore]
-fn shows_nothing_in_directory_with_zero_relevant_files() -> io::Result<()> {
-    let workspace = create_workspace(false)?;
-    expect_output(&workspace, ".", None)?;
-    workspace.close()
-}
-
-#[test]
-#[ignore]
-fn shows_latest_in_directory_with_directory_build_props_file() -> io::Result<()> {
-    let workspace = create_workspace(false)?;
-    touch_path(&workspace, "Directory.Build.props", None)?;
-    expect_output(&workspace, ".", Some(DOTNET_OUTPUT_PATTERN))?;
-    workspace.close()
-}
-
-#[test]
-#[ignore]
-fn shows_latest_in_directory_with_directory_build_targets_file() -> io::Result<()> {
-    let workspace = create_workspace(false)?;
-    touch_path(&workspace, "Directory.Build.targets", None)?;
-    expect_output(&workspace, ".", Some(DOTNET_OUTPUT_PATTERN))?;
-    workspace.close()
-}
-
-#[test]
-#[ignore]
-fn shows_latest_in_directory_with_packages_props_file() -> io::Result<()> {
-    let workspace = create_workspace(false)?;
-    touch_path(&workspace, "Packages.props", None)?;
-    expect_output(&workspace, ".", Some(DOTNET_OUTPUT_PATTERN))?;
-    workspace.close()
-}
-
-#[test]
-#[ignore]
-fn shows_latest_in_directory_with_solution() -> io::Result<()> {
-    let workspace = create_workspace(false)?;
-    touch_path(&workspace, "solution.sln", None)?;
-    expect_output(&workspace, ".", Some(DOTNET_OUTPUT_PATTERN))?;
-    workspace.close()
-}
-
-#[test]
-#[ignore]
-fn shows_latest_in_directory_with_csproj() -> io::Result<()> {
-    let workspace = create_workspace(false)?;
-    let csproj = make_csproj_with_tfm("TargetFramework", "netstandard2.0");
-    touch_path(&workspace, "project.csproj", Some(&csproj))?;
-    expect_output(&workspace, ".", Some(DOTNET_OUTPUT_PATTERN))?;
-    expect_output(&workspace, ".", Some(DOTNET_TFM_PATTERN))?;
-    workspace.close()
-}
-
-#[test]
-#[ignore]
-fn shows_latest_in_directory_with_fsproj() -> io::Result<()> {
-    let workspace = create_workspace(false)?;
-    touch_path(&workspace, "project.fsproj", None)?;
-    expect_output(&workspace, ".", Some(DOTNET_OUTPUT_PATTERN))?;
-    workspace.close()
-}
-
-#[test]
-#[ignore]
-fn shows_latest_in_directory_with_xproj() -> io::Result<()> {
-    let workspace = create_workspace(false)?;
-    touch_path(&workspace, "project.xproj", None)?;
-    expect_output(&workspace, ".", Some(DOTNET_OUTPUT_PATTERN))?;
-    workspace.close()
-}
-
-#[test]
-#[ignore]
-fn shows_latest_in_directory_with_project_json() -> io::Result<()> {
-    let workspace = create_workspace(false)?;
-    touch_path(&workspace, "project.json", None)?;
-    expect_output(&workspace, ".", Some(DOTNET_OUTPUT_PATTERN))?;
-    workspace.close()
-}
-
-#[test]
-#[ignore]
-fn shows_pinned_in_directory_with_global_json() -> io::Result<()> {
-    let workspace = create_workspace(false)?;
-    let global_json = make_pinned_sdk_json(DOTNET_PINNED_VERSION);
-    touch_path(&workspace, "global.json", Some(&global_json))?;
-    expect_output(&workspace, ".", Some(DOTNET_PINNED_VERSION_OUTPUT_PATTERN))?;
-    workspace.close()
-}
-
-#[test]
-#[ignore]
-fn shows_pinned_in_project_below_root_with_global_json() -> io::Result<()> {
-    let workspace = create_workspace(false)?;
-    let global_json = make_pinned_sdk_json(DOTNET_PINNED_VERSION);
-    let csproj = make_csproj_with_tfm("TargetFramework", DOTNET_TFM_PINNED_VERSION);
-    touch_path(&workspace, "global.json", Some(&global_json))?;
-    touch_path(&workspace, "project/project.csproj", Some(&csproj))?;
-    expect_output(
-        &workspace,
-        "project",
-        Some(DOTNET_PINNED_VERSION_OUTPUT_PATTERN),
-    )?;
-    workspace.close()
-}
-
-#[test]
-#[ignore]
-fn shows_pinned_in_deeply_nested_project_within_repository() -> io::Result<()> {
-    let workspace = create_workspace(true)?;
-    let global_json = make_pinned_sdk_json("1.2.3");
-    let csproj = make_csproj_with_tfm("TargetFramework", DOTNET_TFM_PINNED_VERSION);
-    touch_path(&workspace, "global.json", Some(&global_json))?;
-    touch_path(
-        &workspace,
-        "deep/path/to/project/project.csproj",
-        Some(&csproj),
-    )?;
-    expect_output(
-        &workspace,
-        "deep/path/to/project",
-        Some(DOTNET_PINNED_VERSION_OUTPUT_PATTERN),
-    )?;
-    workspace.close()
-}
-
-#[test]
-#[ignore]
-fn shows_single_tfm() -> io::Result<()> {
-    let workspace = create_workspace(false)?;
-    let csproj = make_csproj_with_tfm("TargetFramework", "netstandard2.0");
-    touch_path(&workspace, "project.csproj", Some(&csproj))?;
-    expect_output(&workspace, ".", Some("•NET v2.2.402"))?;
-    expect_output(&workspace, ".", Some("🎯 netstandard2.0"))?;
-    workspace.close()
-}
-
-#[test]
-#[ignore]
-fn shows_multiple_tfms() -> io::Result<()> {
-    let workspace = create_workspace(false)?;
-    let csproj = make_csproj_with_tfm("TargetFrameworks", "netstandard2.0;net461");
-    touch_path(&workspace, "project.csproj", Some(&csproj))?;
-    expect_output(&workspace, ".", Some("•NET v2.2.402"))?;
-    expect_output(&workspace, ".", Some("🎯 netstandard2.0;net461"))?;
-    workspace.close()
-}
-
-fn create_workspace(is_repo: bool) -> io::Result<TempDir> {
-    let repo_dir = tempfile::tempdir()?;
-
-    if is_repo {
-        let mut command = Command::new("git");
-        command
-            .args(&["init", "--quiet"])
-            .stdout(Stdio::null())
-            .stderr(Stdio::null())
-            .stdin(Stdio::null())
-            .current_dir(repo_dir.path());
-
-        if !command.status()?.success() {
-            return Err(Error::from(ErrorKind::Other));
-        }
-    }
-
-    Ok(repo_dir)
-}
-
-fn touch_path(workspace: &TempDir, relative_path: &str, contents: Option<&str>) -> io::Result<()> {
-    let path = workspace.path().join(relative_path);
-
-    DirBuilder::new().recursive(true).create(
-        path.parent()
-            .expect("Expected relative_path to be a file in a directory"),
-    )?;
-
-    let mut file = OpenOptions::new()
-        .write(true)
-        .create(true)
-        .truncate(true)
-        .open(&path)?;
-    write!(file, "{}", contents.unwrap_or(""))?;
-    file.sync_data()
-}
-
-fn make_pinned_sdk_json(version: &str) -> String {
-    let json_text = r#"
-        {
-            "sdk": {
-                "version": "INSERT_VERSION"
-            }
-        }
-    "#;
-    json_text.replace("INSERT_VERSION", version)
-}
-
-fn make_csproj_with_tfm(tfm_element: &str, tfm: &str) -> String {
-    let json_text = r#"
-        <Project>
-            <PropertyGroup>
-                <TFM_ELEMENT>TFM_VALUE</TFM_ELEMENT>
-            </PropertyGroup>
-        </Project>
-    "#;
-    json_text
-        .replace("TFM_ELEMENT", tfm_element)
-        .replace("TFM_VALUE", tfm)
-}
-
-fn expect_output(workspace: &TempDir, run_from: &str, pattern: Option<&str>) -> io::Result<()> {
-    let run_path = workspace.path().join(run_from);
-    let output = common::render_module("dotnet")
-        .current_dir(run_path)
-        .output()?;
-    let text = String::from_utf8(output.stdout).unwrap();
-
-    // This can be helpful for debugging
-    eprintln!("The dotnet module showed: {}", text);
-
-    match pattern {
-        Some(pattern) => {
-            let re = Regex::new(pattern).unwrap();
-            assert!(re.is_match(&text));
-        }
-        None => assert!(text.is_empty()),
-    }
-
-    Ok(())
-}

tests/testsuite/env_var.rs

@@ -1,141 +0,0 @@
-use ansi_term::{Color, Style};
-use std::io;
-
-use crate::common;
-use crate::common::TestCommand;
-
-const TEST_VAR_VALUE: &str = "astronauts";
-
-#[test]
-fn empty_config() -> io::Result<()> {
-    let output = common::render_module("env_var")
-        .env_clear()
-        .use_config(toml::toml! {
-            [env_var]
-        })
-        .output()?;
-    let expected = "";
-    let actual = String::from_utf8(output.stdout).unwrap();
-    assert_eq!(expected, actual);
-    Ok(())
-}
-
-#[test]
-fn defined_variable() -> io::Result<()> {
-    let output = common::render_module("env_var")
-        .env_clear()
-        .use_config(toml::toml! {
-            [env_var]
-            variable = "TEST_VAR"
-        })
-        .env("TEST_VAR", TEST_VAR_VALUE)
-        .output()?;
-    let expected = format!("with {} ", style().paint(TEST_VAR_VALUE));
-    let actual = String::from_utf8(output.stdout).unwrap();
-    assert_eq!(expected, actual);
-    Ok(())
-}
-
-#[test]
-fn undefined_variable() -> io::Result<()> {
-    let output = common::render_module("env_var")
-        .env_clear()
-        .use_config(toml::toml! {
-            [env_var]
-            variable = "TEST_VAR"
-        })
-        .output()?;
-    let expected = "";
-    let actual = String::from_utf8(output.stdout).unwrap();
-    assert_eq!(expected, actual);
-    Ok(())
-}
-
-#[test]
-fn default_has_no_effect() -> io::Result<()> {
-    let output = common::render_module("env_var")
-        .env_clear()
-        .use_config(toml::toml! {
-            [env_var]
-            variable = "TEST_VAR"
-            default = "N/A"
-        })
-        .env("TEST_VAR", TEST_VAR_VALUE)
-        .output()?;
-    let expected = format!("with {} ", style().paint(TEST_VAR_VALUE));
-    let actual = String::from_utf8(output.stdout).unwrap();
-    assert_eq!(expected, actual);
-    Ok(())
-}
-
-#[test]
-fn default_takes_effect() -> io::Result<()> {
-    let output = common::render_module("env_var")
-        .env_clear()
-        .use_config(toml::toml! {
-            [env_var]
-            variable = "UNDEFINED_TEST_VAR"
-            default = "N/A"
-        })
-        .output()?;
-    let expected = format!("with {} ", style().paint("N/A"));
-    let actual = String::from_utf8(output.stdout).unwrap();
-    assert_eq!(expected, actual);
-    Ok(())
-}
-
-#[test]
-fn symbol() -> io::Result<()> {
-    let output = common::render_module("env_var")
-        .env_clear()
-        .use_config(toml::toml! {
-            [env_var]
-            variable = "TEST_VAR"
-            format = "with [■ $env_value](black bold dimmed) "
-        })
-        .env("TEST_VAR", TEST_VAR_VALUE)
-        .output()?;
-    let expected = format!("with {} ", style().paint(format!("■ {}", TEST_VAR_VALUE)));
-    let actual = String::from_utf8(output.stdout).unwrap();
-    assert_eq!(expected, actual);
-    Ok(())
-}
-
-#[test]
-fn prefix() -> io::Result<()> {
-    let output = common::render_module("env_var")
-        .env_clear()
-        .use_config(toml::toml! {
-            [env_var]
-            variable = "TEST_VAR"
-            format = "with [_$env_value](black bold dimmed) "
-        })
-        .env("TEST_VAR", TEST_VAR_VALUE)
-        .output()?;
-    let expected = format!("with {} ", style().paint(format!("_{}", TEST_VAR_VALUE)));
-    let actual = String::from_utf8(output.stdout).unwrap();
-    assert_eq!(expected, actual);
-    Ok(())
-}
-
-#[test]
-fn suffix() -> io::Result<()> {
-    let output = common::render_module("env_var")
-        .env_clear()
-        .use_config(toml::toml! {
-            [env_var]
-            variable = "TEST_VAR"
-            format = "with [${env_value}_](black bold dimmed) "
-        })
-        .env("TEST_VAR", TEST_VAR_VALUE)
-        .output()?;
-    let expected = format!("with {} ", style().paint(format!("{}_", TEST_VAR_VALUE)));
-    let actual = String::from_utf8(output.stdout).unwrap();
-    assert_eq!(expected, actual);
-    Ok(())
-}
-
-fn style() -> Style {
-    // default style
-    Color::Black.bold().dimmed()
-}

tests/testsuite/gcloud.rs

@@ -1,159 +0,0 @@
-use std::fs::{create_dir, File};
-use std::io::{self, Write};
-
-use ansi_term::Color;
-
-use crate::common::{self, TestCommand};
-
-#[test]
-fn account_set() -> io::Result<()> {
-    let dir = tempfile::tempdir()?;
-    let active_config_path = dir.path().join("active_config");
-    let mut active_config_file = File::create(&active_config_path)?;
-    active_config_file.write_all(b"default")?;
-
-    create_dir(dir.path().join("configurations"))?;
-    let config_default_path = dir.path().join("configurations/config_default");
-    let mut config_default_file = File::create(&config_default_path)?;
-    config_default_file.write_all(
-        b"[core]
-account = foo@example.com
-",
-    )?;
-
-    let output = common::render_module("gcloud")
-        .env("CLOUDSDK_CONFIG", dir.path().to_string_lossy().as_ref())
-        .output()?;
-    let expected = format!("on {} ", Color::Blue.bold().paint("☁️ foo@example.com"));
-    let actual = String::from_utf8(output.stdout).unwrap();
-    assert_eq!(actual, expected);
-    dir.close()
-}
-
-#[test]
-fn account_and_region_set() -> io::Result<()> {
-    let dir = tempfile::tempdir()?;
-    let active_config_path = dir.path().join("active_config");
-    let mut active_config_file = File::create(&active_config_path)?;
-    active_config_file.write_all(b"default")?;
-
-    create_dir(dir.path().join("configurations"))?;
-    let config_default_path = dir.path().join("configurations/config_default");
-    let mut config_default_file = File::create(&config_default_path)?;
-    config_default_file.write_all(
-        b"[core]
-account = foo@example.com
-
-[compute]
-region = us-central1
-",
-    )?;
-
-    let output = common::render_module("gcloud")
-        .env("CLOUDSDK_CONFIG", dir.path().to_string_lossy().as_ref())
-        .output()?;
-    let expected = format!(
-        "on {} ",
-        Color::Blue.bold().paint("☁️ foo@example.com(us-central1)")
-    );
-    let actual = String::from_utf8(output.stdout).unwrap();
-    assert_eq!(actual, expected);
-    dir.close()
-}
-
-#[test]
-fn account_and_region_set_with_alias() -> io::Result<()> {
-    let dir = tempfile::tempdir()?;
-    let active_config_path = dir.path().join("active_config");
-    let mut active_config_file = File::create(&active_config_path)?;
-    active_config_file.write_all(b"default")?;
-
-    create_dir(dir.path().join("configurations"))?;
-    let config_default_path = dir.path().join("configurations/config_default");
-    let mut config_default_file = File::create(&config_default_path)?;
-    config_default_file.write_all(
-        b"[core]
-account = foo@example.com
-
-[compute]
-region = us-central1
-",
-    )?;
-
-    let output = common::render_module("gcloud")
-        .env("CLOUDSDK_CONFIG", dir.path().to_string_lossy().as_ref())
-        .use_config(toml::toml! {
-            [gcloud.region_aliases]
-            us-central1 = "uc1"
-        })
-        .output()?;
-    let expected = format!("on {} ", Color::Blue.bold().paint("☁️ foo@example.com(uc1)"));
-    let actual = String::from_utf8(output.stdout).unwrap();
-    assert_eq!(actual, expected);
-    dir.close()
-}
-
-#[test]
-fn active_set() -> io::Result<()> {
-    let dir = tempfile::tempdir()?;
-    let active_config_path = dir.path().join("active_config");
-    let mut active_config_file = File::create(&active_config_path)?;
-    active_config_file.write_all(b"default1")?;
-
-    let output = common::render_module("gcloud")
-        .env("CLOUDSDK_CONFIG", dir.path().to_string_lossy().as_ref())
-        .use_config(toml::toml! {
-            [gcloud]
-            format = "on [$symbol$active]($style) "
-        })
-        .output()?;
-    let expected = format!("on {} ", Color::Blue.bold().paint("☁️ default1"));
-    let actual = String::from_utf8(output.stdout).unwrap();
-    assert_eq!(actual, expected);
-    dir.close()
-}
-
-#[test]
-fn project_set() -> io::Result<()> {
-    let dir = tempfile::tempdir()?;
-    let active_config_path = dir.path().join("active_config");
-    let mut active_config_file = File::create(&active_config_path)?;
-    active_config_file.write_all(b"default")?;
-
-    create_dir(dir.path().join("configurations"))?;
-    let config_default_path = dir.path().join("configurations/config_default");
-    let mut config_default_file = File::create(&config_default_path)?;
-    config_default_file.write_all(
-        b"[core]
-project = abc
-",
-    )?;
-
-    let output = common::render_module("gcloud")
-        .env("CLOUDSDK_CONFIG", dir.path().to_string_lossy().as_ref())
-        .use_config(toml::toml! {
-            [gcloud]
-            format = "on [$symbol$project]($style) "
-        })
-        .output()?;
-    let expected = format!("on {} ", Color::Blue.bold().paint("☁️ abc"));
-    let actual = String::from_utf8(output.stdout).unwrap();
-    assert_eq!(actual, expected);
-    dir.close()
-}
-
-#[test]
-fn region_not_set_with_display_region() -> io::Result<()> {
-    let dir = tempfile::tempdir()?;
-    let output = common::render_module("gcloud")
-        .env("CLOUDSDK_CONFIG", dir.path().to_string_lossy().as_ref())
-        .use_config(toml::toml! {
-            [gcloud]
-            format = "on [$symbol$region]($style) "
-        })
-        .output()?;
-    let expected = "";
-    let actual = String::from_utf8(output.stdout).unwrap();
-    assert_eq!(expected, actual);
-    dir.close()
-}

tests/testsuite/git_branch.rs

@@ -1,292 +0,0 @@
-use ansi_term::Color;
-use remove_dir_all::remove_dir_all;
-use std::io;
-use std::path::Path;
-use std::process::Command;
-
-use crate::common::{self, TestCommand};
-
-#[test]
-fn show_nothing_on_empty_dir() -> io::Result<()> {
-    let repo_dir = tempfile::tempdir()?;
-
-    let output = common::render_module("git_branch")
-        .arg("--path")
-        .arg(repo_dir.path())
-        .output()?;
-    let actual = String::from_utf8(output.stdout).unwrap();
-
-    let expected = "";
-    assert_eq!(expected, actual);
-    repo_dir.close()
-}
-
-#[test]
-fn test_changed_truncation_symbol() -> io::Result<()> {
-    test_truncate_length_with_config(
-        "1337_hello_world",
-        15,
-        "1337_hello_worl",
-        "%",
-        "truncation_symbol = \"%\"",
-    )
-}
-
-#[test]
-fn test_no_truncation_symbol() -> io::Result<()> {
-    test_truncate_length_with_config(
-        "1337_hello_world",
-        15,
-        "1337_hello_worl",
-        "",
-        "truncation_symbol = \"\"",
-    )
-}
-
-#[test]
-fn test_multi_char_truncation_symbol() -> io::Result<()> {
-    test_truncate_length_with_config(
-        "1337_hello_world",
-        15,
-        "1337_hello_worl",
-        "a",
-        "truncation_symbol = \"apple\"",
-    )
-}
-
-#[test]
-fn test_ascii_boundary_below() -> io::Result<()> {
-    test_truncate_length("1337_hello_world", 15, "1337_hello_worl", "…")
-}
-
-#[test]
-fn test_ascii_boundary_on() -> io::Result<()> {
-    test_truncate_length("1337_hello_world", 16, "1337_hello_world", "")
-}
-
-#[test]
-fn test_ascii_boundary_above() -> io::Result<()> {
-    test_truncate_length("1337_hello_world", 17, "1337_hello_world", "")
-}
-
-#[test]
-fn test_one() -> io::Result<()> {
-    test_truncate_length("1337_hello_world", 1, "1", "…")
-}
-
-#[test]
-fn test_zero() -> io::Result<()> {
-    test_truncate_length("1337_hello_world", 0, "1337_hello_world", "")
-}
-
-#[test]
-fn test_negative() -> io::Result<()> {
-    test_truncate_length("1337_hello_world", -1, "1337_hello_world", "")
-}
-
-#[test]
-fn test_hindi_truncation() -> io::Result<()> {
-    test_truncate_length("नमस्ते", 3, "नमस्", "…")
-}
-
-#[test]
-fn test_hindi_truncation2() -> io::Result<()> {
-    test_truncate_length("नमस्त", 3, "नमस्", "…")
-}
-
-#[test]
-fn test_japanese_truncation() -> io::Result<()> {
-    test_truncate_length("がんばってね", 4, "がんばっ", "…")
-}
-
-#[test]
-fn test_format_no_branch() -> io::Result<()> {
-    test_format("1337_hello_world", "no_branch", "", "no_branch")
-}
-
-#[test]
-fn test_format_just_branch_name() -> io::Result<()> {
-    test_format("1337_hello_world", "$branch", "", "1337_hello_world")
-}
-
-#[test]
-fn test_format_just_branch_name_color() -> io::Result<()> {
-    test_format(
-        "1337_hello_world",
-        "[$branch](bold blue)",
-        "",
-        Color::Blue.bold().paint("1337_hello_world").to_string(),
-    )
-}
-
-#[test]
-fn test_format_mixed_colors() -> io::Result<()> {
-    test_format(
-        "1337_hello_world",
-        "branch: [$branch](bold blue) [THE COLORS](red) ",
-        "",
-        format!(
-            "branch: {} {} ",
-            Color::Blue.bold().paint("1337_hello_world").to_string(),
-            Color::Red.paint("THE COLORS").to_string()
-        ),
-    )
-}
-
-#[test]
-fn test_format_symbol_style() -> io::Result<()> {
-    test_format(
-        "1337_hello_world",
-        "$symbol[$branch]($style)",
-        r#"
-            symbol = "git: "
-            style = "green"
-        "#,
-        format!(
-            "git: {}",
-            Color::Green.paint("1337_hello_world").to_string(),
-        ),
-    )
-}
-
-#[test]
-fn test_works_with_unborn_default_branch() -> io::Result<()> {
-    let repo_dir = tempfile::tempdir()?.into_path();
-
-    Command::new("git")
-        .args(&["init"])
-        .current_dir(&repo_dir)
-        .output()?;
-
-    Command::new("git")
-        .args(&["symbolic-ref", "HEAD", "refs/heads/main"])
-        .current_dir(&repo_dir)
-        .output()?;
-
-    let output = common::render_module("git_branch")
-        .arg("--path")
-        .arg(&repo_dir)
-        .output()
-        .unwrap();
-    let actual = String::from_utf8(output.stdout).unwrap();
-
-    let expected = format!(
-        "on {} ",
-        Color::Purple.bold().paint(format!("\u{e0a0} {}", "main")),
-    );
-    assert_eq!(expected, actual);
-    remove_dir_all(repo_dir)
-}
-
-#[test]
-fn test_git_dir_env_variable() -> io::Result<()> {
-    let repo_dir = tempfile::tempdir()?.into_path();
-
-    Command::new("git")
-        .args(&["init"])
-        .current_dir(&repo_dir)
-        .output()?;
-
-    let output = common::render_module("git_branch")
-        .env("GIT_DIR", Path::new(&repo_dir).join(".git"))
-        .output()
-        .unwrap();
-    let actual = String::from_utf8(output.stdout).unwrap();
-
-    let expected = format!(
-        "on {} ",
-        Color::Purple.bold().paint(format!("\u{e0a0} {}", "master")),
-    );
-    assert_eq!(expected, actual);
-    remove_dir_all(repo_dir)
-}
-
-fn test_truncate_length(
-    branch_name: &str,
-    truncate_length: i64,
-    expected_name: &str,
-    truncation_symbol: &str,
-) -> io::Result<()> {
-    test_truncate_length_with_config(
-        branch_name,
-        truncate_length,
-        expected_name,
-        truncation_symbol,
-        "",
-    )
-}
-
-fn test_truncate_length_with_config(
-    branch_name: &str,
-    truncate_length: i64,
-    expected_name: &str,
-    truncation_symbol: &str,
-    config_options: &str,
-) -> io::Result<()> {
-    let repo_dir = common::create_fixture_repo()?;
-
-    Command::new("git")
-        .args(&["checkout", "-b", branch_name])
-        .current_dir(repo_dir.as_path())
-        .output()?;
-
-    let output = common::render_module("git_branch")
-        .use_config(
-            toml::from_str(&format!(
-                "
-                    [git_branch]
-                        truncation_length = {}
-                        {}
-                ",
-                truncate_length, config_options
-            ))
-            .unwrap(),
-        )
-        .arg("--path")
-        .arg(&repo_dir)
-        .output()?;
-    let actual = String::from_utf8(output.stdout).unwrap();
-
-    let expected = format!(
-        "on {} ",
-        Color::Purple
-            .bold()
-            .paint(format!("\u{e0a0} {}{}", expected_name, truncation_symbol)),
-    );
-    assert_eq!(expected, actual);
-    remove_dir_all(repo_dir)
-}
-
-fn test_format<T: AsRef<str>>(
-    branch_name: &str,
-    format: &str,
-    config_options: &str,
-    expected: T,
-) -> io::Result<()> {
-    let repo_dir = common::create_fixture_repo()?;
-
-    Command::new("git")
-        .args(&["checkout", "-b", branch_name])
-        .current_dir(repo_dir.as_path())
-        .output()?;
-
-    let output = common::render_module("git_branch")
-        .use_config(
-            toml::from_str(&format!(
-                r#"
-                    [git_branch]
-                        format = "{}"
-                        {}
-                "#,
-                format, config_options
-            ))
-            .unwrap(),
-        )
-        .arg("--path")
-        .arg(&repo_dir)
-        .output()?;
-    let actual = String::from_utf8(output.stdout).unwrap();
-
-    assert_eq!(expected.as_ref(), actual);
-    remove_dir_all(repo_dir)
-}

tests/testsuite/git_commit.rs

@@ -1,135 +0,0 @@
-use ansi_term::Color;
-use remove_dir_all::remove_dir_all;
-use std::process::Command;
-use std::{io, str};
-
-use crate::common::{self, TestCommand};
-
-#[test]
-fn show_nothing_on_empty_dir() -> io::Result<()> {
-    let repo_dir = tempfile::tempdir()?;
-
-    let output = common::render_module("git_commit")
-        .arg("--path")
-        .arg(repo_dir.path())
-        .output()?;
-    let actual = String::from_utf8(output.stdout).unwrap();
-
-    let expected = "";
-    assert_eq!(expected, actual);
-    repo_dir.close()
-}
-
-#[test]
-fn test_render_commit_hash() -> io::Result<()> {
-    let repo_dir = common::create_fixture_repo()?;
-
-    let mut git_output = Command::new("git")
-        .args(&["rev-parse", "HEAD"])
-        .current_dir(repo_dir.as_path())
-        .output()?
-        .stdout;
-    git_output.truncate(7);
-    let expected_hash = str::from_utf8(&git_output).unwrap();
-
-    let output = common::render_module("git_commit")
-        .use_config(toml::toml! {
-            [git_commit]
-                only_detached = false
-        })
-        .arg("--path")
-        .arg(&repo_dir)
-        .output()?;
-
-    let actual = String::from_utf8(output.stdout).unwrap();
-    let mut expected = Color::Green
-        .bold()
-        .paint(format!("({})", expected_hash))
-        .to_string();
-    expected.push(' ');
-
-    assert_eq!(expected, actual);
-    remove_dir_all(repo_dir)
-}
-
-#[test]
-fn test_render_commit_hash_len_override() -> io::Result<()> {
-    let repo_dir = common::create_fixture_repo()?;
-
-    let mut git_output = Command::new("git")
-        .args(&["rev-parse", "HEAD"])
-        .current_dir(repo_dir.as_path())
-        .output()?
-        .stdout;
-    git_output.truncate(14);
-    let expected_hash = str::from_utf8(&git_output).unwrap();
-
-    let output = common::render_module("git_commit")
-        .use_config(toml::toml! {
-            [git_commit]
-                only_detached = false
-                commit_hash_length = 14
-        })
-        .arg("--path")
-        .arg(&repo_dir)
-        .output()?;
-
-    let actual = String::from_utf8(output.stdout).unwrap();
-    let mut expected = Color::Green
-        .bold()
-        .paint(format!("({})", expected_hash))
-        .to_string();
-    expected.push(' ');
-
-    assert_eq!(expected, actual);
-    remove_dir_all(repo_dir)
-}
-
-#[test]
-fn test_render_commit_hash_only_detached_on_branch() -> io::Result<()> {
-    let repo_dir = common::create_fixture_repo()?;
-
-    let output = common::render_module("git_commit")
-        .arg("--path")
-        .arg(&repo_dir)
-        .output()?;
-
-    let actual = String::from_utf8(output.stdout).unwrap();
-
-    assert_eq!("", actual);
-    remove_dir_all(repo_dir)
-}
-
-#[test]
-fn test_render_commit_hash_only_detached_on_detached() -> io::Result<()> {
-    let repo_dir = common::create_fixture_repo()?;
-
-    Command::new("git")
-        .args(&["checkout", "@~1"])
-        .current_dir(repo_dir.as_path())
-        .output()?;
-
-    let mut git_output = Command::new("git")
-        .args(&["rev-parse", "HEAD"])
-        .current_dir(repo_dir.as_path())
-        .output()?
-        .stdout;
-    git_output.truncate(7);
-    let expected_hash = str::from_utf8(&git_output).unwrap();
-
-    let output = common::render_module("git_commit")
-        .arg("--path")
-        .arg(&repo_dir)
-        .output()?;
-
-    let actual = String::from_utf8(output.stdout).unwrap();
-
-    let mut expected = Color::Green
-        .bold()
-        .paint(format!("({})", expected_hash))
-        .to_string();
-    expected.push(' ');
-
-    assert_eq!(expected, actual);
-    remove_dir_all(repo_dir)
-}

tests/testsuite/git_state.rs

@@ -1,217 +0,0 @@
-use super::common;
-use ansi_term::Color;
-use std::ffi::OsStr;
-use std::fs::OpenOptions;
-use std::io::{self, Error, ErrorKind, Write};
-use std::process::{Command, Stdio};
-
-#[test]
-fn show_nothing_on_empty_dir() -> io::Result<()> {
-    let repo_dir = tempfile::tempdir()?;
-
-    let output = common::render_module("git_state")
-        .arg("--path")
-        .arg(repo_dir.path())
-        .output()?;
-    let actual = String::from_utf8(output.stdout).unwrap();
-
-    let expected = "";
-    assert_eq!(expected, actual);
-    repo_dir.close()
-}
-
-#[test]
-fn shows_rebasing() -> io::Result<()> {
-    let repo_dir = create_repo_with_conflict()?;
-    let path = path_str(&repo_dir)?;
-
-    run_git_cmd(&["rebase", "other-branch"], Some(path), false)?;
-
-    let output = common::render_module("git_state")
-        .arg("--path")
-        .arg(&path)
-        .output()?;
-
-    let actual = String::from_utf8(output.stdout).unwrap();
-
-    let mut expected = Color::Yellow.bold().paint("(REBASING 1/1)").to_string();
-    expected.push(' ');
-
-    assert_eq!(expected, actual);
-
-    Ok(())
-}
-
-#[test]
-fn shows_merging() -> io::Result<()> {
-    let repo_dir = create_repo_with_conflict()?;
-    let path = path_str(&repo_dir)?;
-
-    run_git_cmd(&["merge", "other-branch"], Some(path), false)?;
-
-    let output = common::render_module("git_state")
-        .arg("--path")
-        .arg(&path)
-        .output()?;
-
-    let actual = String::from_utf8(output.stdout).unwrap();
-
-    let mut expected = Color::Yellow.bold().paint("(MERGING)").to_string();
-    expected.push(' ');
-
-    assert_eq!(expected, actual);
-
-    Ok(())
-}
-
-#[test]
-fn shows_cherry_picking() -> io::Result<()> {
-    let repo_dir = create_repo_with_conflict()?;
-    let path = path_str(&repo_dir)?;
-
-    run_git_cmd(&["cherry-pick", "other-branch"], Some(path), false)?;
-
-    let output = common::render_module("git_state")
-        .arg("--path")
-        .arg(&path)
-        .output()?;
-
-    let actual = String::from_utf8(output.stdout).unwrap();
-
-    let mut expected = Color::Yellow.bold().paint("(CHERRY-PICKING)").to_string();
-    expected.push(' ');
-
-    assert_eq!(expected, actual);
-
-    Ok(())
-}
-
-#[test]
-fn shows_bisecting() -> io::Result<()> {
-    let repo_dir = create_repo_with_conflict()?;
-    let path = path_str(&repo_dir)?;
-
-    run_git_cmd(&["bisect", "start"], Some(path), false)?;
-
-    let output = common::render_module("git_state")
-        .arg("--path")
-        .arg(&path)
-        .output()?;
-
-    let actual = String::from_utf8(output.stdout).unwrap();
-
-    let mut expected = Color::Yellow.bold().paint("(BISECTING)").to_string();
-    expected.push(' ');
-
-    assert_eq!(expected, actual);
-
-    Ok(())
-}
-
-#[test]
-fn shows_reverting() -> io::Result<()> {
-    let repo_dir = create_repo_with_conflict()?;
-    let path = path_str(&repo_dir)?;
-
-    run_git_cmd(&["revert", "--no-commit", "HEAD~1"], Some(path), false)?;
-
-    let output = common::render_module("git_state")
-        .arg("--path")
-        .arg(&path)
-        .output()?;
-
-    let actual = String::from_utf8(output.stdout).unwrap();
-
-    let mut expected = Color::Yellow.bold().paint("(REVERTING)").to_string();
-    expected.push(' ');
-
-    assert_eq!(expected, actual);
-    Ok(())
-}
-
-fn run_git_cmd<A, S>(args: A, dir: Option<&str>, expect_ok: bool) -> io::Result<()>
-where
-    A: IntoIterator<Item = S>,
-    S: AsRef<OsStr>,
-{
-    let mut command = Command::new("git");
-    command
-        .args(args)
-        .stdout(Stdio::null())
-        .stderr(Stdio::null())
-        .stdin(Stdio::null());
-
-    if let Some(dir) = dir {
-        command.current_dir(dir);
-    }
-
-    let status = command.status()?;
-
-    if expect_ok && !status.success() {
-        Err(Error::from(ErrorKind::Other))
-    } else {
-        Ok(())
-    }
-}
-
-fn create_repo_with_conflict() -> io::Result<tempfile::TempDir> {
-    let repo_dir = tempfile::tempdir()?;
-    let path = path_str(&repo_dir)?;
-    let conflicted_file = repo_dir.path().join("the_file");
-
-    let write_file = |text: &str| {
-        let mut file = OpenOptions::new()
-            .write(true)
-            .create(true)
-            .truncate(true)
-            .open(&conflicted_file)?;
-        write!(file, "{}", text)
-    };
-
-    // Initialize a new git repo
-    run_git_cmd(&["init", "--quiet", path], None, true)?;
-
-    // Set local author info
-    run_git_cmd(
-        &["config", "--local", "user.email", "starship@example.com"],
-        Some(path),
-        true,
-    )?;
-    run_git_cmd(
-        &["config", "--local", "user.name", "starship"],
-        Some(path),
-        true,
-    )?;
-
-    // Write a file on master and commit it
-    write_file("Version A")?;
-    run_git_cmd(&["add", "the_file"], Some(path), true)?;
-    run_git_cmd(&["commit", "--message", "Commit A"], Some(path), true)?;
-
-    // Switch to another branch, and commit a change to the file
-    run_git_cmd(&["checkout", "-b", "other-branch"], Some(path), true)?;
-    write_file("Version B")?;
-    run_git_cmd(
-        &["commit", "--all", "--message", "Commit B"],
-        Some(path),
-        true,
-    )?;
-
-    // Switch back to master, and commit a third change to the file
-    run_git_cmd(&["checkout", "master"], Some(path), true)?;
-    write_file("Version C")?;
-    run_git_cmd(
-        &["commit", "--all", "--message", "Commit C"],
-        Some(path),
-        true,
-    )?;
-
-    Ok(repo_dir)
-}
-
-fn path_str(repo_dir: &tempfile::TempDir) -> io::Result<&str> {
-    repo_dir
-        .path()
-        .to_str()
-        .ok_or_else(|| Error::from(ErrorKind::Other))
-}

tests/testsuite/git_status.rs

@@ -1,680 +0,0 @@
-use ansi_term::{ANSIStrings, Color};
-use remove_dir_all::remove_dir_all;
-use std::fs::{self, File};
-use std::io;
-use std::path::PathBuf;
-use std::process::Command;
-
-use crate::common::{self, TestCommand};
-
-/// Right after the calls to git the filesystem state may not have finished
-/// updating yet causing some of the tests to fail. These barriers are placed
-/// after each call to git.
-/// This barrier is windows-specific though other operating systems may need it
-/// in the future.
-#[cfg(not(windows))]
-fn barrier() {}
-#[cfg(windows)]
-fn barrier() {
-    std::thread::sleep(std::time::Duration::from_millis(500));
-}
-
-fn format_output(symbols: &str) -> String {
-    format!("{} ", Color::Red.bold().paint(format!("[{}]", symbols)))
-}
-
-#[test]
-fn show_nothing_on_empty_dir() -> io::Result<()> {
-    let repo_dir = tempfile::tempdir()?;
-
-    let output = common::render_module("git_status")
-        .arg("--path")
-        .arg(repo_dir.path())
-        .output()?;
-    let actual = String::from_utf8(output.stdout).unwrap();
-
-    let expected = "";
-    assert_eq!(expected, actual);
-    repo_dir.close()
-}
-
-#[test]
-#[ignore]
-fn shows_behind() -> io::Result<()> {
-    let repo_dir = common::create_fixture_repo()?;
-
-    behind(&repo_dir)?;
-
-    let output = common::render_module("git_status")
-        .arg("--path")
-        .arg(&repo_dir)
-        .output()?;
-    let actual = String::from_utf8(output.stdout).unwrap();
-    let expected = format_output("⇣");
-
-    assert_eq!(expected, actual);
-
-    remove_dir_all(repo_dir)
-}
-
-#[test]
-#[ignore]
-fn shows_behind_with_count() -> io::Result<()> {
-    let repo_dir = common::create_fixture_repo()?;
-
-    behind(&repo_dir)?;
-
-    let output = common::render_module("git_status")
-        .use_config(toml::toml! {
-            [git_status]
-            behind = "⇣$count"
-        })
-        .arg("--path")
-        .arg(&repo_dir)
-        .output()?;
-    let actual = String::from_utf8(output.stdout).unwrap();
-    let expected = format_output("⇣1");
-
-    assert_eq!(expected, actual);
-
-    remove_dir_all(repo_dir)
-}
-
-#[test]
-#[ignore]
-fn shows_ahead() -> io::Result<()> {
-    let repo_dir = common::create_fixture_repo()?;
-
-    File::create(repo_dir.join("readme.md"))?.sync_all()?;
-    ahead(&repo_dir)?;
-
-    let output = common::render_module("git_status")
-        .arg("--path")
-        .arg(&repo_dir)
-        .output()?;
-    let actual = String::from_utf8(output.stdout).unwrap();
-    let expected = format_output("⇡");
-
-    assert_eq!(expected, actual);
-
-    remove_dir_all(repo_dir)
-}
-
-#[test]
-#[ignore]
-fn shows_ahead_with_count() -> io::Result<()> {
-    let repo_dir = common::create_fixture_repo()?;
-
-    File::create(repo_dir.join("readme.md"))?.sync_all()?;
-    ahead(&repo_dir)?;
-
-    let output = common::render_module("git_status")
-        .use_config(toml::toml! {
-            [git_status]
-            ahead="⇡$count"
-        })
-        .arg("--path")
-        .arg(&repo_dir)
-        .output()?;
-    let actual = String::from_utf8(output.stdout).unwrap();
-    let expected = format_output("⇡1");
-
-    assert_eq!(expected, actual);
-
-    remove_dir_all(repo_dir)
-}
-
-#[test]
-#[ignore]
-fn shows_diverged() -> io::Result<()> {
-    let repo_dir = common::create_fixture_repo()?;
-
-    diverge(&repo_dir)?;
-
-    let output = common::render_module("git_status")
-        .arg("--path")
-        .arg(&repo_dir)
-        .output()?;
-    let actual = String::from_utf8(output.stdout).unwrap();
-    let expected = format_output("⇕");
-
-    assert_eq!(expected, actual);
-
-    remove_dir_all(repo_dir)
-}
-
-#[test]
-#[ignore]
-fn shows_diverged_with_count() -> io::Result<()> {
-    let repo_dir = common::create_fixture_repo()?;
-
-    diverge(&repo_dir)?;
-
-    let output = common::render_module("git_status")
-        .use_config(toml::toml! {
-            [git_status]
-            diverged=r"⇕⇡$ahead_count⇣$behind_count"
-        })
-        .arg("--path")
-        .arg(&repo_dir)
-        .output()?;
-    let actual = String::from_utf8(output.stdout).unwrap();
-    let expected = format_output("⇕⇡1⇣1");
-    assert_eq!(expected, actual);
-
-    remove_dir_all(repo_dir)
-}
-
-#[test]
-#[ignore]
-fn shows_conflicted() -> io::Result<()> {
-    let repo_dir = common::create_fixture_repo()?;
-
-    create_conflict(&repo_dir)?;
-
-    let output = common::render_module("git_status")
-        .arg("--path")
-        .arg(&repo_dir)
-        .output()?;
-    let actual = String::from_utf8(output.stdout).unwrap();
-    let expected = format_output("=");
-
-    assert_eq!(expected, actual);
-
-    remove_dir_all(repo_dir)
-}
-
-#[test]
-#[ignore]
-fn shows_conflicted_with_count() -> io::Result<()> {
-    let repo_dir = common::create_fixture_repo()?;
-
-    create_conflict(&repo_dir)?;
-
-    let output = common::render_module("git_status")
-        .use_config(toml::toml! {
-            [git_status]
-            conflicted = "=$count"
-        })
-        .arg("--path")
-        .arg(&repo_dir)
-        .output()?;
-    let actual = String::from_utf8(output.stdout).unwrap();
-    let expected = format_output("=1");
-
-    assert_eq!(expected, actual);
-
-    remove_dir_all(repo_dir)
-}
-
-#[test]
-#[ignore]
-fn shows_untracked_file() -> io::Result<()> {
-    let repo_dir = common::create_fixture_repo()?;
-
-    create_untracked(&repo_dir)?;
-
-    let output = common::render_module("git_status")
-        .arg("--path")
-        .arg(&repo_dir)
-        .output()?;
-    let actual = String::from_utf8(output.stdout).unwrap();
-    let expected = format_output("?");
-
-    assert_eq!(expected, actual);
-
-    remove_dir_all(repo_dir)
-}
-
-#[test]
-#[ignore]
-fn shows_untracked_file_with_count() -> io::Result<()> {
-    let repo_dir = common::create_fixture_repo()?;
-
-    create_untracked(&repo_dir)?;
-
-    let output = common::render_module("git_status")
-        .use_config(toml::toml! {
-            [git_status]
-            untracked = "?$count"
-        })
-        .arg("--path")
-        .arg(&repo_dir)
-        .output()?;
-    let actual = String::from_utf8(output.stdout).unwrap();
-    let expected = format_output("?1");
-
-    assert_eq!(expected, actual);
-
-    remove_dir_all(repo_dir)
-}
-
-#[test]
-#[ignore]
-fn doesnt_show_untracked_file_if_disabled() -> io::Result<()> {
-    let repo_dir = common::create_fixture_repo()?;
-
-    create_untracked(&repo_dir)?;
-
-    Command::new("git")
-        .args(&["config", "status.showUntrackedFiles", "no"])
-        .current_dir(repo_dir.as_path())
-        .output()?;
-    barrier();
-
-    let output = common::render_module("git_status")
-        .arg("--path")
-        .arg(&repo_dir)
-        .output()?;
-    let actual = String::from_utf8(output.stdout).unwrap();
-    let expected = "";
-
-    assert_eq!(expected, actual);
-
-    remove_dir_all(repo_dir)
-}
-
-#[test]
-#[ignore]
-fn shows_stashed() -> io::Result<()> {
-    let repo_dir = common::create_fixture_repo()?;
-    barrier();
-
-    create_stash(&repo_dir)?;
-
-    Command::new("git")
-        .args(&["reset", "--hard", "HEAD"])
-        .current_dir(repo_dir.as_path())
-        .output()?;
-    barrier();
-
-    let output = common::render_module("git_status")
-        .arg("--path")
-        .arg(&repo_dir)
-        .output()?;
-    let actual = String::from_utf8(output.stdout).unwrap();
-    let expected = format_output("$");
-
-    assert_eq!(expected, actual);
-
-    remove_dir_all(repo_dir)
-}
-
-#[test]
-fn shows_stashed_with_count() -> io::Result<()> {
-    let repo_dir = common::create_fixture_repo()?;
-    barrier();
-
-    create_stash(&repo_dir)?;
-    barrier();
-
-    Command::new("git")
-        .args(&["reset", "--hard", "HEAD"])
-        .current_dir(repo_dir.as_path())
-        .output()?;
-    barrier();
-
-    let output = common::render_module("git_status")
-        .use_config(toml::toml! {
-            [git_status]
-            stashed = r"\$$count"
-        })
-        .arg("--path")
-        .arg(&repo_dir)
-        .output()?;
-    let actual = String::from_utf8(output.stdout).unwrap();
-    let expected = format_output("$1");
-
-    assert_eq!(expected, actual);
-    remove_dir_all(repo_dir)
-}
-
-#[test]
-#[ignore]
-fn shows_modified() -> io::Result<()> {
-    let repo_dir = common::create_fixture_repo()?;
-
-    create_modified(&repo_dir)?;
-
-    let output = common::render_module("git_status")
-        .arg("--path")
-        .arg(&repo_dir)
-        .output()?;
-    let actual = String::from_utf8(output.stdout).unwrap();
-    let expected = format_output("!");
-
-    assert_eq!(expected, actual);
-    remove_dir_all(repo_dir)
-}
-
-#[test]
-#[ignore]
-fn shows_modified_with_count() -> io::Result<()> {
-    let repo_dir = common::create_fixture_repo()?;
-
-    create_modified(&repo_dir)?;
-
-    let output = common::render_module("git_status")
-        .use_config(toml::toml! {
-            [git_status]
-            modified = "!$count"
-        })
-        .arg("--path")
-        .arg(&repo_dir)
-        .output()?;
-    let actual = String::from_utf8(output.stdout).unwrap();
-    let expected = format_output("!1");
-
-    assert_eq!(expected, actual);
-
-    remove_dir_all(repo_dir)
-}
-
-#[test]
-#[ignore]
-fn shows_staged_file() -> io::Result<()> {
-    let repo_dir = common::create_fixture_repo()?;
-
-    create_staged(&repo_dir)?;
-
-    let output = common::render_module("git_status")
-        .arg("--path")
-        .arg(&repo_dir)
-        .output()?;
-    let actual = String::from_utf8(output.stdout).unwrap();
-    let expected = format_output("+");
-
-    assert_eq!(expected, actual);
-
-    remove_dir_all(repo_dir)
-}
-
-#[test]
-#[ignore]
-fn shows_staged_file_with_count() -> io::Result<()> {
-    let repo_dir = common::create_fixture_repo()?;
-
-    create_staged(&repo_dir)?;
-
-    let output = common::render_module("git_status")
-        .use_config(toml::toml! {
-            [git_status]
-            staged = "+[$count](green)"
-        })
-        .arg("--path")
-        .arg(&repo_dir)
-        .output()?;
-    let actual = String::from_utf8(output.stdout).unwrap();
-    let expected = format!(
-        "{} ",
-        ANSIStrings(&[
-            Color::Red.bold().paint("[+"),
-            Color::Green.paint("1"),
-            Color::Red.bold().paint("]"),
-        ])
-    );
-
-    assert_eq!(expected, actual);
-
-    remove_dir_all(repo_dir)
-}
-
-#[test]
-#[ignore]
-fn shows_renamed_file() -> io::Result<()> {
-    let repo_dir = common::create_fixture_repo()?;
-
-    create_renamed(&repo_dir)?;
-
-    let output = common::render_module("git_status")
-        .arg("--path")
-        .arg(&repo_dir)
-        .output()?;
-    let actual = String::from_utf8(output.stdout).unwrap();
-    let expected = format_output("»");
-
-    assert_eq!(expected, actual);
-
-    remove_dir_all(repo_dir)
-}
-
-#[test]
-#[ignore]
-fn shows_renamed_file_with_count() -> io::Result<()> {
-    let repo_dir = common::create_fixture_repo()?;
-
-    create_renamed(&repo_dir)?;
-
-    let output = common::render_module("git_status")
-        .use_config(toml::toml! {
-            [git_status]
-            renamed = "»$count"
-        })
-        .arg("--path")
-        .arg(&repo_dir)
-        .output()?;
-    let actual = String::from_utf8(output.stdout).unwrap();
-    let expected = format_output("»1");
-
-    assert_eq!(expected, actual);
-
-    remove_dir_all(repo_dir)
-}
-
-#[test]
-#[ignore]
-fn shows_deleted_file() -> io::Result<()> {
-    let repo_dir = common::create_fixture_repo()?;
-
-    create_deleted(&repo_dir)?;
-
-    let output = common::render_module("git_status")
-        .arg("--path")
-        .arg(&repo_dir)
-        .output()?;
-    let actual = String::from_utf8(output.stdout).unwrap();
-    let expected = format_output("✘");
-
-    assert_eq!(expected, actual);
-
-    remove_dir_all(repo_dir)
-}
-
-#[test]
-#[ignore]
-fn shows_deleted_file_with_count() -> io::Result<()> {
-    let repo_dir = common::create_fixture_repo()?;
-
-    create_deleted(&repo_dir)?;
-
-    let output = common::render_module("git_status")
-        .use_config(toml::toml! {
-            [git_status]
-            deleted = "✘$count"
-        })
-        .arg("--path")
-        .arg(&repo_dir)
-        .output()?;
-    let actual = String::from_utf8(output.stdout).unwrap();
-    let expected = format_output("✘1");
-
-    assert_eq!(expected, actual);
-
-    remove_dir_all(repo_dir)
-}
-
-// Whenever a file is manually renamed, git itself ('git status') does not treat such file as renamed,
-// but as untracked instead. The following test checks if manually deleted and manually renamed
-// files are tracked by git_status module in the same way 'git status' does.
-#[test]
-#[ignore]
-fn ignore_manually_renamed() -> io::Result<()> {
-    let repo_dir = common::create_fixture_repo()?;
-    File::create(repo_dir.join("a"))?.sync_all()?;
-    File::create(repo_dir.join("b"))?.sync_all()?;
-    Command::new("git")
-        .args(&["add", "--all"])
-        .current_dir(&repo_dir)
-        .output()?;
-    Command::new("git")
-        .args(&["commit", "-m", "add new files"])
-        .current_dir(&repo_dir)
-        .output()?;
-
-    fs::remove_file(repo_dir.join("a"))?;
-    fs::rename(repo_dir.join("b"), repo_dir.join("c"))?;
-    barrier();
-
-    let output = common::render_module("git_status")
-        .arg("--path")
-        .arg(&repo_dir)
-        .env_clear()
-        .use_config(toml::toml! {
-            [git_status]
-            prefix = ""
-            suffix = ""
-            style = ""
-            ahead = "A"
-            deleted = "D"
-            untracked = "U"
-            renamed = "R"
-        })
-        .output()?;
-
-    let actual = String::from_utf8(output.stdout).unwrap();
-    assert!(actual.contains('A'));
-    assert!(actual.contains('D'));
-    assert!(actual.contains('U'));
-    assert!(!actual.contains('R'));
-
-    remove_dir_all(repo_dir)
-}
-
-fn ahead(repo_dir: &PathBuf) -> io::Result<()> {
-    File::create(repo_dir.join("readme.md"))?.sync_all()?;
-
-    Command::new("git")
-        .args(&["commit", "-am", "Update readme"])
-        .current_dir(&repo_dir)
-        .output()?;
-    barrier();
-
-    Ok(())
-}
-
-fn behind(repo_dir: &PathBuf) -> io::Result<()> {
-    Command::new("git")
-        .args(&["reset", "--hard", "HEAD^"])
-        .current_dir(repo_dir.as_path())
-        .output()?;
-    barrier();
-
-    Ok(())
-}
-
-fn diverge(repo_dir: &PathBuf) -> io::Result<()> {
-    Command::new("git")
-        .args(&["reset", "--hard", "HEAD^"])
-        .current_dir(repo_dir.as_path())
-        .output()?;
-    barrier();
-
-    fs::write(repo_dir.join("Cargo.toml"), " ")?;
-
-    Command::new("git")
-        .args(&["commit", "-am", "Update readme"])
-        .current_dir(repo_dir.as_path())
-        .output()?;
-    barrier();
-
-    Ok(())
-}
-
-fn create_conflict(repo_dir: &PathBuf) -> io::Result<()> {
-    Command::new("git")
-        .args(&["reset", "--hard", "HEAD^"])
-        .current_dir(repo_dir.as_path())
-        .output()?;
-    barrier();
-
-    fs::write(repo_dir.join("readme.md"), "# goodbye")?;
-
-    Command::new("git")
-        .args(&["add", "."])
-        .current_dir(repo_dir.as_path())
-        .output()?;
-    barrier();
-
-    Command::new("git")
-        .args(&["commit", "-m", "Change readme"])
-        .current_dir(repo_dir.as_path())
-        .output()?;
-    barrier();
-
-    Command::new("git")
-        .args(&["pull", "--rebase"])
-        .current_dir(repo_dir.as_path())
-        .output()?;
-    barrier();
-
-    Ok(())
-}
-
-fn create_stash(repo_dir: &PathBuf) -> io::Result<()> {
-    File::create(repo_dir.join("readme.md"))?.sync_all()?;
-    barrier();
-
-    Command::new("git")
-        .args(&["stash", "--all"])
-        .current_dir(repo_dir.as_path())
-        .output()?;
-    barrier();
-
-    Ok(())
-}
-
-fn create_untracked(repo_dir: &PathBuf) -> io::Result<()> {
-    File::create(repo_dir.join("license"))?.sync_all()?;
-
-    Ok(())
-}
-
-fn create_modified(repo_dir: &PathBuf) -> io::Result<()> {
-    File::create(repo_dir.join("readme.md"))?.sync_all()?;
-
-    Ok(())
-}
-
-fn create_staged(repo_dir: &PathBuf) -> io::Result<()> {
-    File::create(repo_dir.join("license"))?.sync_all()?;
-
-    Command::new("git")
-        .args(&["add", "."])
-        .current_dir(repo_dir.as_path())
-        .output()?;
-    barrier();
-
-    Ok(())
-}
-
-fn create_renamed(repo_dir: &PathBuf) -> io::Result<()> {
-    Command::new("git")
-        .args(&["mv", "readme.md", "readme.md.bak"])
-        .current_dir(repo_dir.as_path())
-        .output()?;
-    barrier();
-
-    Command::new("git")
-        .args(&["add", "-A"])
-        .current_dir(repo_dir.as_path())
-        .output()?;
-    barrier();
-
-    Ok(())
-}
-
-fn create_deleted(repo_dir: &PathBuf) -> io::Result<()> {
-    fs::remove_file(repo_dir.join("readme.md"))?;
-
-    Ok(())
-}

tests/testsuite/hg_branch.rs

@@ -1,239 +0,0 @@
-use ansi_term::{Color, Style};
-use std::fs;
-use std::path::{Path, PathBuf};
-use std::process::Command;
-use std::{env, io};
-
-use crate::common::{self, TestCommand};
-
-enum Expect<'a> {
-    BranchName(&'a str),
-    Empty,
-    NoTruncation,
-    Symbol(&'a str),
-    Style(Style),
-    TruncationSymbol(&'a str),
-}
-
-#[test]
-fn show_nothing_on_empty_dir() -> io::Result<()> {
-    let repo_dir = tempfile::tempdir()?;
-
-    let output = common::render_module("hg_branch")
-        .arg("--path")
-        .arg(repo_dir.path())
-        .output()?;
-    let actual = String::from_utf8(output.stdout).unwrap();
-
-    let expected = "";
-    assert_eq!(expected, actual);
-    repo_dir.close()
-}
-
-#[test]
-#[ignore]
-fn test_hg_get_branch_fails() -> io::Result<()> {
-    let tempdir = tempfile::tempdir()?;
-
-    // Create a fake corrupted mercurial repo.
-    let hgdir = tempdir.path().join(".hg");
-    fs::create_dir(&hgdir)?;
-    fs::write(&hgdir.join("requires"), "fake-corrupted-repo")?;
-
-    expect_hg_branch_with_config(
-        tempdir.path(),
-        "",
-        &[Expect::BranchName(&"default"), Expect::NoTruncation],
-    )?;
-    tempdir.close()
-}
-
-#[test]
-#[ignore]
-fn test_hg_get_branch_autodisabled() -> io::Result<()> {
-    let tempdir = tempfile::tempdir()?;
-    expect_hg_branch_with_config(tempdir.path(), "", &[Expect::Empty])?;
-    tempdir.close()
-}
-
-#[test]
-#[ignore]
-fn test_hg_bookmark() -> io::Result<()> {
-    let tempdir = tempfile::tempdir()?;
-    let repo_dir = create_fixture_hgrepo(&tempdir)?;
-    run_hg(&["bookmark", "bookmark-101"], &repo_dir)?;
-    expect_hg_branch_with_config(
-        &repo_dir,
-        "",
-        &[Expect::BranchName(&"bookmark-101"), Expect::NoTruncation],
-    )?;
-    tempdir.close()
-}
-
-#[test]
-#[ignore]
-fn test_default_truncation_symbol() -> io::Result<()> {
-    let tempdir = tempfile::tempdir()?;
-    let repo_dir = create_fixture_hgrepo(&tempdir)?;
-    run_hg(&["branch", "-f", "branch-name-101"], &repo_dir)?;
-    run_hg(
-        &[
-            "commit",
-            "-m",
-            "empty commit 101",
-            "-u",
-            "fake user <fake@user>",
-        ],
-        &repo_dir,
-    )?;
-    expect_hg_branch_with_config(
-        &repo_dir,
-        "truncation_length = 14",
-        &[Expect::BranchName(&"branch-name-10")],
-    )?;
-    tempdir.close()
-}
-
-#[test]
-#[ignore]
-fn test_configured_symbols() -> io::Result<()> {
-    let tempdir = tempfile::tempdir()?;
-    let repo_dir = create_fixture_hgrepo(&tempdir)?;
-    run_hg(&["branch", "-f", "branch-name-121"], &repo_dir)?;
-    run_hg(
-        &[
-            "commit",
-            "-m",
-            "empty commit 121",
-            "-u",
-            "fake user <fake@user>",
-        ],
-        &repo_dir,
-    )?;
-    expect_hg_branch_with_config(
-        &repo_dir,
-        r#"
-          symbol = "B "
-          truncation_length = 14
-          truncation_symbol = "%"
-        "#,
-        &[
-            Expect::BranchName(&"branch-name-12"),
-            Expect::Symbol(&"B"),
-            Expect::TruncationSymbol(&"%"),
-        ],
-    )?;
-    tempdir.close()
-}
-
-#[test]
-#[ignore]
-fn test_configured_style() -> io::Result<()> {
-    let tempdir = tempfile::tempdir()?;
-    let repo_dir = create_fixture_hgrepo(&tempdir)?;
-    run_hg(&["branch", "-f", "branch-name-131"], &repo_dir)?;
-    run_hg(
-        &[
-            "commit",
-            "-m",
-            "empty commit 131",
-            "-u",
-            "fake user <fake@user>",
-        ],
-        &repo_dir,
-    )?;
-
-    expect_hg_branch_with_config(
-        &repo_dir,
-        r#"
-          style = "underline blue"
-        "#,
-        &[
-            Expect::BranchName(&"branch-name-131"),
-            Expect::Style(Color::Blue.underline()),
-            Expect::TruncationSymbol(&""),
-        ],
-    )?;
-    tempdir.close()
-}
-
-fn expect_hg_branch_with_config(
-    repo_dir: &Path,
-    config_options: &str,
-    expectations: &[Expect],
-) -> io::Result<()> {
-    let output = common::render_module("hg_branch")
-        .use_config(toml::from_str(&format!(
-            r#"
-            [hg_branch]
-            {}
-            "#,
-            config_options
-        ))?)
-        .arg("--path")
-        .arg(repo_dir.to_str().unwrap())
-        .output()?;
-
-    let actual = String::from_utf8(output.stdout).unwrap();
-
-    let mut expect_branch_name = "default";
-    let mut expect_style = Color::Purple.bold();
-    let mut expect_symbol = "\u{e0a0}";
-    let mut expect_truncation_symbol = "…";
-
-    for expect in expectations {
-        match expect {
-            Expect::Empty => {
-                assert_eq!("", actual);
-                return Ok(());
-            }
-            Expect::Symbol(symbol) => {
-                expect_symbol = symbol;
-            }
-            Expect::TruncationSymbol(truncation_symbol) => {
-                expect_truncation_symbol = truncation_symbol;
-            }
-            Expect::NoTruncation => {
-                expect_truncation_symbol = "";
-            }
-            Expect::BranchName(branch_name) => {
-                expect_branch_name = branch_name;
-            }
-            Expect::Style(style) => expect_style = *style,
-        }
-    }
-
-    let expected = format!(
-        "on {} ",
-        expect_style.paint(format!(
-            "{} {}{}",
-            expect_symbol, expect_branch_name, expect_truncation_symbol
-        )),
-    );
-    assert_eq!(expected, actual);
-    Ok(())
-}
-
-pub fn create_fixture_hgrepo(tempdir: &tempfile::TempDir) -> io::Result<PathBuf> {
-    let repo_path = tempdir.path().join("hg-repo");
-    let fixture_path = env::current_dir()?.join("tests/fixtures/hg-repo.bundle");
-
-    run_hg(
-        &[
-            "clone",
-            fixture_path.to_str().unwrap(),
-            repo_path.to_str().unwrap(),
-        ],
-        &tempdir.path(),
-    )?;
-
-    Ok(repo_path)
-}
-
-fn run_hg(args: &[&str], repo_dir: &Path) -> io::Result<()> {
-    Command::new("hg")
-        .args(args)
-        .current_dir(&repo_dir)
-        .output()?;
-    Ok(())
-}

tests/testsuite/hostname.rs

@@ -1,120 +0,0 @@
-use ansi_term::{Color, Style};
-use std::io;
-
-use crate::common;
-use crate::common::TestCommand;
-
-#[test]
-fn ssh_only_false() -> io::Result<()> {
-    let hostname = match get_hostname() {
-        Some(h) => h,
-        None => return hostname_not_tested(),
-    };
-    let output = common::render_module("hostname")
-        .env_clear()
-        .use_config(toml::toml! {
-            [hostname]
-            ssh_only = false
-            trim_at = ""
-        })
-        .output()?;
-    let actual = String::from_utf8(output.stdout).unwrap();
-    let expected = format!("on {} ", style().paint(hostname));
-    assert_eq!(expected, actual);
-    Ok(())
-}
-
-#[test]
-fn no_ssh() -> io::Result<()> {
-    let output = common::render_module("hostname")
-        .env_clear()
-        .use_config(toml::toml! {
-            [hostname]
-            ssh_only = true
-        })
-        .output()?;
-    let actual = String::from_utf8(output.stdout).unwrap();
-    assert_eq!("", actual);
-    Ok(())
-}
-
-#[test]
-fn ssh() -> io::Result<()> {
-    let hostname = match get_hostname() {
-        Some(h) => h,
-        None => return hostname_not_tested(),
-    };
-    let output = common::render_module("hostname")
-        .env_clear()
-        .use_config(toml::toml! {
-            [hostname]
-            ssh_only = true
-            trim_at = ""
-        })
-        .env("SSH_CONNECTION", "something")
-        .output()?;
-    let actual = String::from_utf8(output.stdout).unwrap();
-    let expected = format!("on {} ", style().paint(hostname));
-    assert_eq!(expected, actual);
-    Ok(())
-}
-
-#[test]
-fn no_trim_at() -> io::Result<()> {
-    let hostname = match get_hostname() {
-        Some(h) => h,
-        None => return hostname_not_tested(),
-    };
-    let output = common::render_module("hostname")
-        .env_clear()
-        .use_config(toml::toml! {
-            [hostname]
-            ssh_only = false
-            trim_at = ""
-        })
-        .output()?;
-    let actual = String::from_utf8(output.stdout).unwrap();
-    let expected = format!("on {} ", style().paint(hostname));
-    assert_eq!(expected, actual);
-    Ok(())
-}
-
-#[test]
-fn trim_at() -> io::Result<()> {
-    let hostname = match get_hostname() {
-        Some(h) => h,
-        None => return hostname_not_tested(),
-    };
-    let (remainder, trim_at) = hostname.split_at(1);
-    let output = common::render_module("hostname")
-        .env_clear()
-        .use_config(toml::toml! {
-            [hostname]
-            ssh_only = false
-            trim_at = trim_at
-        })
-        .output()?;
-    let actual = String::from_utf8(output.stdout).unwrap();
-    let expected = format!("on {} ", style().paint(remainder));
-    assert_eq!(expected, actual);
-    Ok(())
-}
-
-fn get_hostname() -> Option<String> {
-    match gethostname::gethostname().into_string() {
-        Ok(hostname) => Some(hostname),
-        Err(_) => None,
-    }
-}
-
-fn style() -> Style {
-    Color::Green.bold().dimmed()
-}
-
-fn hostname_not_tested() -> io::Result<()> {
-    println!(
-        "hostname was not tested because gethostname failed! \
-         This could be caused by your hostname containing invalid UTF."
-    );
-    Ok(())
-}

tests/testsuite/jobs.rs

@@ -1,66 +0,0 @@
-use ansi_term::Color;
-use std::io;
-
-use crate::common::{self, TestCommand};
-
-#[test]
-fn config_blank_job_0() -> io::Result<()> {
-    let output = common::render_module("jobs").arg("--jobs=0").output()?;
-    let actual = String::from_utf8(output.stdout).unwrap();
-
-    let expected = "";
-    assert_eq!(expected, actual);
-    Ok(())
-}
-
-#[test]
-fn config_blank_job_1() -> io::Result<()> {
-    let output = common::render_module("jobs").arg("--jobs=1").output()?;
-    let actual = String::from_utf8(output.stdout).unwrap();
-
-    let expected = format!("{} ", Color::Blue.bold().paint("✦"));
-    assert_eq!(expected, actual);
-    Ok(())
-}
-
-#[test]
-fn config_blank_job_2() -> io::Result<()> {
-    let output = common::render_module("jobs").arg("--jobs=2").output()?;
-    let actual = String::from_utf8(output.stdout).unwrap();
-
-    let expected = format!("{} ", Color::Blue.bold().paint("✦2"));
-    assert_eq!(expected, actual);
-    Ok(())
-}
-
-#[test]
-fn config_2_job_2() -> io::Result<()> {
-    let output = common::render_module("jobs")
-        .use_config(toml::toml! {
-            [jobs]
-            threshold = 2
-        })
-        .arg("--jobs=2")
-        .output()?;
-    let actual = String::from_utf8(output.stdout).unwrap();
-
-    let expected = format!("{} ", Color::Blue.bold().paint("✦"));
-    assert_eq!(expected, actual);
-    Ok(())
-}
-
-#[test]
-fn config_2_job_3() -> io::Result<()> {
-    let output = common::render_module("jobs")
-        .use_config(toml::toml! {
-            [jobs]
-            threshold = 2
-        })
-        .arg("--jobs=3")
-        .output()?;
-    let actual = String::from_utf8(output.stdout).unwrap();
-
-    let expected = format!("{} ", Color::Blue.bold().paint("✦3"));
-    assert_eq!(expected, actual);
-    Ok(())
-}

tests/testsuite/main.rs

@@ -1,25 +0,0 @@
-mod aws;
-mod character;
-mod cmd_duration;
-mod common;
-mod conda;
-mod configuration;
-mod directory;
-mod dotnet;
-mod env_var;
-mod gcloud;
-mod git_branch;
-mod git_commit;
-mod git_state;
-mod git_status;
-mod hg_branch;
-mod hostname;
-mod jobs;
-mod modules;
-mod nix_shell;
-mod python;
-mod shlvl;
-mod singularity;
-mod terraform;
-mod time;
-mod username;

tests/testsuite/modules.rs

@@ -1,31 +0,0 @@
-use std::io;
-
-use crate::common;
-
-#[test]
-fn unknown_module_name() -> io::Result<()> {
-    let unknown_module_name = "some_random_name";
-    let output = common::render_module(unknown_module_name).output()?;
-    let actual_stdout = String::from_utf8(output.stdout).unwrap();
-    let actual_stderr = String::from_utf8(output.stderr).unwrap();
-    let expected_stdout = "";
-    let expected_stderr = format!(
-        "Error: Unknown module {}. Use starship module --list to list out all supported modules.\n",
-        unknown_module_name
-    );
-    assert_eq!(expected_stdout, actual_stdout);
-    assert_eq!(expected_stderr, actual_stderr);
-    Ok(())
-}
-
-#[test]
-fn known_module_name() -> io::Result<()> {
-    let output = common::render_module("line_break").output()?;
-    let actual_stdout = String::from_utf8(output.stdout).unwrap();
-    let actual_stderr = String::from_utf8(output.stderr).unwrap();
-    let expected_stdout = "\n";
-    let expected_stderr = "";
-    assert_eq!(expected_stdout, actual_stdout);
-    assert_eq!(expected_stderr, actual_stderr);
-    Ok(())
-}

tests/testsuite/nix_shell.rs

@@ -1,72 +0,0 @@
-use ansi_term::Color;
-use std::io;
-
-use crate::common;
-
-#[test]
-fn no_env_variables() -> io::Result<()> {
-    let output = common::render_module("nix_shell").output()?;
-    let actual = String::from_utf8(output.stdout).unwrap();
-    assert_eq!("", actual);
-    Ok(())
-}
-
-#[test]
-fn invalid_env_variables() -> io::Result<()> {
-    let output = common::render_module("nix_shell")
-        .env("IN_NIX_SHELL", "something_wrong")
-        .output()?;
-    let actual = String::from_utf8(output.stdout).unwrap();
-    assert_eq!("", actual);
-    Ok(())
-}
-
-#[test]
-fn pure_shell() -> io::Result<()> {
-    let output = common::render_module("nix_shell")
-        .env("IN_NIX_SHELL", "pure")
-        .output()?;
-    let actual = String::from_utf8(output.stdout).unwrap();
-
-    let expected = format!("via {} ", Color::Blue.bold().paint("❄️  pure"));
-    assert_eq!(expected, actual);
-    Ok(())
-}
-
-#[test]
-fn impure_shell() -> io::Result<()> {
-    let output = common::render_module("nix_shell")
-        .env("IN_NIX_SHELL", "impure")
-        .output()?;
-    let actual = String::from_utf8(output.stdout).unwrap();
-
-    let expected = format!("via {} ", Color::Blue.bold().paint("❄️  impure"));
-    assert_eq!(expected, actual);
-    Ok(())
-}
-
-#[test]
-fn pure_shell_name() -> io::Result<()> {
-    let output = common::render_module("nix_shell")
-        .env("IN_NIX_SHELL", "pure")
-        .env("name", "starship")
-        .output()?;
-    let actual = String::from_utf8(output.stdout).unwrap();
-
-    let expected = format!("via {} ", Color::Blue.bold().paint("❄️  pure (starship)"));
-    assert_eq!(expected, actual);
-    Ok(())
-}
-
-#[test]
-fn impure_shell_name() -> io::Result<()> {
-    let output = common::render_module("nix_shell")
-        .env("IN_NIX_SHELL", "impure")
-        .env("name", "starship")
-        .output()?;
-    let actual = String::from_utf8(output.stdout).unwrap();
-
-    let expected = format!("via {} ", Color::Blue.bold().paint("❄️  impure (starship)"));
-    assert_eq!(expected, actual);
-    Ok(())
-}

tests/testsuite/python.rs

@@ -1,37 +0,0 @@
-use std::fs::File;
-use std::io;
-
-use crate::common;
-
-// TODO - These tests should be moved into the python module when we have sorted out mocking of env
-// vars.
-
-#[test]
-fn with_virtual_env() -> io::Result<()> {
-    let dir = tempfile::tempdir()?;
-    File::create(dir.path().join("main.py"))?.sync_all()?;
-    let output = common::render_module("python")
-        .env("VIRTUAL_ENV", "/foo/bar/my_venv")
-        .arg("--path")
-        .arg(dir.path())
-        .output()?;
-    let actual = String::from_utf8(output.stdout).unwrap();
-
-    assert!(actual.contains("my_venv"));
-    dir.close()
-}
-
-#[test]
-fn with_active_venv() -> io::Result<()> {
-    let dir = tempfile::tempdir()?;
-
-    let output = common::render_module("python")
-        .env("VIRTUAL_ENV", "/foo/bar/my_venv")
-        .arg("--path")
-        .arg(dir.path())
-        .output()?;
-    let actual = String::from_utf8(output.stdout).unwrap();
-
-    assert!(actual.contains("my_venv"));
-    dir.close()
-}

tests/testsuite/shlvl.rs

@@ -1,159 +0,0 @@
-use ansi_term::{Color, Style};
-use std::io;
-
-use crate::common;
-use crate::common::TestCommand;
-
-const SHLVL_ENV_VAR: &str = "SHLVL";
-
-fn style() -> Style {
-    // default style
-    Color::Yellow.bold()
-}
-
-#[test]
-fn empty_config() -> io::Result<()> {
-    let output = common::render_module("shlvl")
-        .env_clear()
-        .use_config(toml::toml! {
-            [shlvl]
-        })
-        .env(SHLVL_ENV_VAR, "2")
-        .output()?;
-    let expected = "";
-    let actual = String::from_utf8(output.stdout).unwrap();
-    assert_eq!(expected, actual);
-    Ok(())
-}
-
-#[test]
-fn enabled() -> io::Result<()> {
-    let output = common::render_module("shlvl")
-        .env_clear()
-        .use_config(toml::toml! {
-            [shlvl]
-            disabled = false
-        })
-        .env(SHLVL_ENV_VAR, "2")
-        .output()?;
-    let expected = format!("{} ", style().paint("↕️  2"));
-    let actual = String::from_utf8(output.stdout).unwrap();
-    assert_eq!(expected, actual);
-    Ok(())
-}
-
-#[test]
-fn no_level() -> io::Result<()> {
-    let output = common::render_module("shlvl")
-        .env_clear()
-        .use_config(toml::toml! {
-            [shlvl]
-            disabled = false
-        })
-        .output()?;
-    let expected = "";
-    let actual = String::from_utf8(output.stdout).unwrap();
-    assert_eq!(expected, actual);
-    Ok(())
-}
-
-#[test]
-fn enabled_config_level_1() -> io::Result<()> {
-    let output = common::render_module("shlvl")
-        .env_clear()
-        .use_config(toml::toml! {
-            [shlvl]
-            disabled = false
-        })
-        .env(SHLVL_ENV_VAR, "1")
-        .output()?;
-    let expected = "";
-    let actual = String::from_utf8(output.stdout).unwrap();
-    assert_eq!(expected, actual);
-    Ok(())
-}
-
-#[test]
-fn lower_threshold() -> io::Result<()> {
-    let output = common::render_module("shlvl")
-        .env_clear()
-        .use_config(toml::toml! {
-            [shlvl]
-            threshold = 1
-            disabled = false
-        })
-        .env(SHLVL_ENV_VAR, "1")
-        .output()?;
-    let expected = format!("{} ", style().paint("↕️  1"));
-    let actual = String::from_utf8(output.stdout).unwrap();
-    assert_eq!(expected, actual);
-    Ok(())
-}
-
-#[test]
-fn higher_threshold() -> io::Result<()> {
-    let output = common::render_module("shlvl")
-        .env_clear()
-        .use_config(toml::toml! {
-            [shlvl]
-            threshold = 3
-            disabled = false
-        })
-        .env(SHLVL_ENV_VAR, "1")
-        .output()?;
-    let expected = "";
-    let actual = String::from_utf8(output.stdout).unwrap();
-    assert_eq!(expected, actual);
-    Ok(())
-}
-
-#[test]
-fn custom_style() -> io::Result<()> {
-    let output = common::render_module("shlvl")
-        .env_clear()
-        .use_config(toml::toml! {
-            [shlvl]
-            style = "Red Underline"
-            disabled = false
-        })
-        .env(SHLVL_ENV_VAR, "2")
-        .output()?;
-    let expected = format!("{} ", Color::Red.underline().paint("↕️  2"));
-    let actual = String::from_utf8(output.stdout).unwrap();
-    assert_eq!(expected, actual);
-    Ok(())
-}
-
-#[test]
-fn custom_symbol() -> io::Result<()> {
-    let output = common::render_module("shlvl")
-        .env_clear()
-        .use_config(toml::toml! {
-            [shlvl]
-            symbol = "shlvl is "
-            disabled = false
-        })
-        .env(SHLVL_ENV_VAR, "2")
-        .output()?;
-    let expected = format!("{} ", style().paint("shlvl is 2"));
-    let actual = String::from_utf8(output.stdout).unwrap();
-    assert_eq!(expected, actual);
-    Ok(())
-}
-
-#[test]
-fn formatting() -> io::Result<()> {
-    let output = common::render_module("shlvl")
-        .env_clear()
-        .use_config(toml::toml! {
-            [shlvl]
-            format = "$symbol going down [$shlvl]($style) GOING UP "
-            disabled = false
-        })
-        .env(SHLVL_ENV_VAR, "2")
-        .output()?;
-    let expected = format!("↕️   going down {} GOING UP ", style().paint("2"));
-    let actual = String::from_utf8(output.stdout).unwrap();
-    assert_eq!(expected, actual);
-    Ok(())
-}

tests/testsuite/singularity.rs

@@ -1,27 +0,0 @@
-use ansi_term::Color;
-use std::io;
-
-use crate::common;
-
-#[test]
-fn no_env_set() -> io::Result<()> {
-    let output = common::render_module("singularity").output()?;
-    let actual = String::from_utf8(output.stdout).unwrap();
-
-    let expected = "";
-    assert_eq!(expected, actual);
-    Ok(())
-}
-#[test]
-fn env_set() -> io::Result<()> {
-    let output = common::render_module("singularity")
-        .env_clear()
-        .env("SINGULARITY_NAME", "centos.img")
-        .output()?;
-
-    let expected = format!("{} ", Color::Blue.bold().dimmed().paint("[centos.img]"));
-    let actual = String::from_utf8(output.stdout).unwrap();
-
-    assert_eq!(expected, actual);
-    Ok(())
-}

tests/testsuite/terraform.rs

@@ -1,118 +0,0 @@
-use ansi_term::Color;
-use std::fs::{self, File};
-use std::io::{self, Write};
-
-use crate::common;
-
-#[test]
-fn folder_without_dotterraform() -> io::Result<()> {
-    let dir = tempfile::tempdir()?;
-
-    let output = common::render_module("terraform")
-        .arg("--path")
-        .arg(dir.path())
-        .output()?;
-    let actual = String::from_utf8(output.stdout).unwrap();
-
-    let expected = "";
-    assert_eq!(expected, actual);
-    dir.close()
-}
-
-#[test]
-#[ignore]
-fn folder_with_tf_file() -> io::Result<()> {
-    let dir = tempfile::tempdir()?;
-    File::create(dir.path().join("main.tf"))?;
-
-    let output = common::render_module("terraform")
-        .arg("--path")
-        .arg(dir.path())
-        .output()?;
-    let actual = String::from_utf8(output.stdout).unwrap();
-
-    let expected = format!("via {} ", Color::Fixed(105).bold().paint("💠 default"));
-    assert_eq!(expected, actual);
-    dir.close()
-}
-
-#[test]
-#[ignore]
-fn folder_with_workspace_override() -> io::Result<()> {
-    let dir = tempfile::tempdir()?;
-    File::create(dir.path().join("main.tf"))?;
-
-    let output = common::render_module("terraform")
-        .arg("--path")
-        .arg(dir.path())
-        .env("TF_WORKSPACE", "development")
-        .output()?;
-    let actual = String::from_utf8(output.stdout).unwrap();
-
-    let expected = format!("via {} ", Color::Fixed(105).bold().paint("💠 development"));
-    assert_eq!(expected, actual);
-    dir.close()
-}
-
-#[test]
-#[ignore]
-fn folder_with_datadir_override() -> io::Result<()> {
-    let dir = tempfile::tempdir()?;
-    File::create(dir.path().join("main.tf"))?;
-
-    let datadir = tempfile::tempdir()?;
-    let mut file = File::create(datadir.path().join("environment"))?;
-    file.write_all(b"development")?;
-    file.sync_all()?;
-
-    let output = common::render_module("terraform")
-        .arg("--path")
-        .arg(dir.path())
-        .env("TF_DATA_DIR", datadir.path())
-        .output()?;
-    let actual = String::from_utf8(output.stdout).unwrap();
-
-    let expected = format!("via {} ", Color::Fixed(105).bold().paint("💠 development"));
-    assert_eq!(expected, actual);
-    dir.close()?;
-    datadir.close()
-}
-
-#[test]
-#[ignore]
-fn folder_with_dotterraform_no_environment() -> io::Result<()> {
-    let dir = tempfile::tempdir()?;
-    let tf_dir = dir.path().join(".terraform");
-    fs::create_dir(&tf_dir)?;
-
-    let output = common::render_module("terraform")
-        .arg("--path")
-        .arg(dir.path())
-        .output()?;
-    let actual = String::from_utf8(output.stdout).unwrap();
-
-    let expected = format!("via {} ", Color::Fixed(105).bold().paint("💠 default"));
-    assert_eq!(expected, actual);
-    Ok(())
-}
-
-#[test]
-#[ignore]
-fn folder_with_dotterraform_with_environment() -> io::Result<()> {
-    let dir = tempfile::tempdir()?;
-    let tf_dir = dir.path().join(".terraform");
-    fs::create_dir(&tf_dir)?;
-    let mut file = File::create(tf_dir.join("environment"))?;
-    file.write_all(b"development")?;
-    file.sync_all()?;
-
-    let output = common::render_module("terraform")
-        .arg("--path")
-        .arg(dir.path())
-        .output()?;
-    let actual = String::from_utf8(output.stdout).unwrap();
-
-    let expected = format!("via {} ", Color::Fixed(105).bold().paint("💠 development"));
-    assert_eq!(expected, actual);
-    Ok(())
-}

tests/testsuite/time.rs

@@ -1,59 +0,0 @@
-use std::io;
-
-use crate::common::{self, TestCommand};
-
-/* Note: tests in this crate cannot rely on the actual time displayed by
-the module, since that is dependent on the time inside the test environment,
-which we cannot control.
-
-However, we *can* test certain things here, such as the fact that the module
-should not display when disabled, should display *something* when enabled,
-and should have the correct prefixes and suffixes in a given config */
-
-#[test]
-fn config_enabled() -> io::Result<()> {
-    let output = common::render_module("time")
-        .use_config(toml::toml! {
-            [time]
-            disabled = false
-        })
-        .output()?;
-    let actual = String::from_utf8(output.stdout).unwrap();
-
-    // We can't test what it actually is...but we can assert it's not blank
-    assert!(!actual.is_empty());
-    Ok(())
-}
-
-#[test]
-fn config_blank() -> io::Result<()> {
-    let output = common::render_module("time").output()?;
-    let actual = String::from_utf8(output.stdout).unwrap();
-
-    let expected = "";
-    assert_eq!(expected, actual);
-    Ok(())
-}
-
-#[test]
-fn config_check_prefix_and_suffix() -> io::Result<()> {
-    let output = common::render_module("time")
-        .use_config(toml::toml! {
-            [time]
-            disabled = false
-            format = "at [\\[$time\\]]($style) "
-            time_format = "%T"
-        })
-        .output()?;
-    let actual = String::from_utf8(output.stdout).unwrap();
-
-    // This is the prefix with "at ", the color code, then the prefix char [
-    let col_prefix = format!("at {}{}[", '\u{1b}', "[1;33m");
-
-    // This is the suffix with suffix char ']', then color codes, then a space
-    let col_suffix = format!("]{}{} ", '\u{1b}', "[0m");
-
-    assert!(actual.starts_with(&col_prefix));
-    assert!(actual.ends_with(&col_suffix));
-    Ok(())
-}

tests/testsuite/username.rs

@@ -1,79 +0,0 @@
-use ansi_term::Color;
-use std::io;
-
-use crate::common::{self, TestCommand};
-
-// TODO: Add tests for if root user (UID == 0)
-// Requires mocking
-
-#[test]
-fn no_env_variables() -> io::Result<()> {
-    let output = common::render_module("username").output()?;
-    let actual = String::from_utf8(output.stdout).unwrap();
-    assert_eq!("", actual);
-    Ok(())
-}
-
-#[test]
-fn logname_equals_user() -> io::Result<()> {
-    let output = common::render_module("username")
-        .env("LOGNAME", "astronaut")
-        .env("USER", "astronaut")
-        .output()?;
-    let actual = String::from_utf8(output.stdout).unwrap();
-    assert_eq!("", actual);
-    Ok(())
-}
-
-#[test]
-fn ssh_wo_username() -> io::Result<()> {
-    // SSH connection w/o username
-    let output = common::render_module("username")
-        .env("SSH_CONNECTION", "192.168.223.17 36673 192.168.223.229 22")
-        .output()?;
-    let actual = String::from_utf8(output.stdout).unwrap();
-    assert_eq!("", actual);
-    Ok(())
-}
-
-#[test]
-fn current_user_not_logname() -> io::Result<()> {
-    let output = common::render_module("username")
-        .env("LOGNAME", "astronaut")
-        .env("USER", "cosmonaut")
-        .output()?;
-    let actual = String::from_utf8(output.stdout).unwrap();
-
-    let expected = format!("via {} ", Color::Yellow.bold().paint("cosmonaut"));
-    assert_eq!(expected, actual);
-    Ok(())
-}
-
-#[test]
-fn ssh_connection() -> io::Result<()> {
-    let output = common::render_module("username")
-        .env("USER", "astronaut")
-        .env("SSH_CONNECTION", "192.168.223.17 36673 192.168.223.229 22")
-        .output()?;
-    let actual = String::from_utf8(output.stdout).unwrap();
-
-    let expected = format!("via {} ", Color::Yellow.bold().paint("astronaut"));
-    assert_eq!(expected, actual);
-    Ok(())
-}
-
-#[test]
-fn show_always() -> io::Result<()> {
-    let output = common::render_module("username")
-        .env("USER", "astronaut")
-        .use_config(toml::toml! {
-        [username]
-        show_always = true})
-        .output()?;
-    let actual = String::from_utf8(output.stdout).unwrap();
-
-    let expected = format!("via {} ", Color::Yellow.bold().paint("astronaut"));
-
-    assert_eq!(expected, actual);
-    Ok(())
-}