Add unit test for dockers compare_synced_folders

test/unit/plugins/providers/docker/action/compare_synced_folders_test.rb

@@ -0,0 +1,89 @@
+require_relative "../../../../base"
+require_relative "../../../../../../plugins/providers/docker/action/compare_synced_folders"
+
+describe VagrantPlugins::DockerProvider::Action::CompareSyncedFolders do
+  include_context "unit"
+  include_context "virtualbox"
+
+  let(:sandbox) { isolated_environment }
+
+  let(:iso_env) do
+    # We have to create a Vagrantfile so there is a root path
+    sandbox.vagrantfile("")
+    sandbox.create_vagrant_env
+  end
+
+  let(:machine) do
+    iso_env.machine(iso_env.machine_names[0], :virtualbox).tap do |m|
+      allow(m.provider).to receive(:driver).and_return(driver)
+    end
+  end
+
+  let(:env)    {{ machine: machine, ui: machine.ui, root_path: Pathname.new(".") }}
+  let(:app)    { lambda { |*args| }}
+  let(:driver) { double("driver") }
+
+  subject { described_class.new(app, env) }
+
+  after do
+    sandbox.close
+  end
+
+  describe "#call" do
+    let(:cached) { {:docker=>{"/vagrant"=>{:guestpath=>"/vagrant", :hostpath=>"/home/hashicorp/code/vagrant-sandbox", :disabled=>false, :__vagrantfile=>true}}} }
+    let(:fresh) { {:docker=>{"/vagrant"=>{:guestpath=>"/vagrant", :hostpath=>".", :disabled=>false, :__vagrantfile=>true}}} }
+
+    let(:existing) { {"/vagrant"=>"/home/hashicorp/code/vagrant-sandbox"} }
+
+
+    it "calls the next action in the chain" do
+      allow(machine.provider).to receive(:host_vm?).and_return(false)
+      called = false
+      app = ->(*args) { called = true }
+
+      action = described_class.new(app, env)
+      action.call(env)
+
+      expect(called).to eq(true)
+    end
+
+    context "invalid or existing entries" do
+      let(:cached) { {:docker=>{"/vagrant"=>{:guestpath=>"/not-real", :hostpath=>"/home/hashicorp/code/vagrant-sandbox", :disabled=>false, :__vagrantfile=>true}}} }
+      let(:fresh) { {:docker=>{"/vagrant"=>{:guestpath=>"/vagrant", :hostpath=>".", :disabled=>false, :__vagrantfile=>true}}} }
+      it "shows a warning" do
+        allow(machine.provider).to receive(:host_vm?).and_return(false)
+
+        called = false
+        app = ->(*args) { called = true }
+        action = described_class.new(app, env)
+
+        expect(action).to receive(:synced_folders).
+          with(machine, cached: true).and_return(cached)
+        expect(action).to receive(:synced_folders).
+          with(machine).and_return(fresh)
+
+        expect(machine.ui).to receive(:warn)
+
+        action.call(env)
+        expect(called).to eq(true)
+      end
+    end
+
+    it "shows no warning comparing synced folders" do
+      allow(machine.provider).to receive(:host_vm?).and_return(false)
+
+      called = false
+      app = ->(*args) { called = true }
+      action = described_class.new(app, env)
+
+      expect(action).to receive(:synced_folders).
+        with(machine, cached: true).and_return(cached)
+      expect(action).to receive(:synced_folders).
+        with(machine).and_return(fresh)
+
+      action.call(env)
+      expect(machine.ui).not_to receive(:warn)
+      expect(called).to eq(true)
+    end
+  end
+end