Add unit test for validate command

test/unit/plugins/commands/validate/command_test.rb

@@ -0,0 +1,52 @@
+require_relative "../../../base"
+require_relative "../../../../../plugins/commands/validate/command"
+
+describe VagrantPlugins::CommandValidate::Command do
+  include_context "unit"
+  include_context "command plugin helpers"
+
+  let(:iso_env) do
+    isolated_environment
+  end
+
+  let(:env) do
+    iso_env.create_vagrant_env
+  end
+
+  let(:argv)   { [] }
+
+  before(:all) do
+    I18n.load_path << Vagrant.source_root.join("plugins/commands/port/locales/en.yml")
+    I18n.reload!
+  end
+
+  subject { described_class.new(argv, env) }
+
+  describe "#execute" do
+    it "validates correct Vagrantfile" do
+      iso_env.vagrantfile(<<-EOH)
+        Vagrant.configure("2") do |config|
+          config.vm.box = "hashicorp/precise64"
+        end
+      EOH
+
+      expect(env.ui).to receive(:info).with { |message, _|
+        expect(message).to include("Vagrantfile validated successfully.")
+      }
+
+      expect(subject.execute).to eq(0)
+    end
+
+    it "validates the configuration" do
+      iso_env.vagrantfile <<-EOH
+        Vagrant.configure("2") do |config|
+          config.vm.bix = "hashicorp/precise64"
+        end
+      EOH
+
+      expect { subject.execute }.to raise_error(Vagrant::Errors::ConfigInvalid) { |err|
+        expect(err.message).to include("The following settings shouldn't exist: bix")
+      }
+    end
+  end
+end