Add installation tests

.github/workflows/test.yml

@@ -6,8 +6,12 @@ permissions:
 
 jobs:
   test:
-    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        os: [macos-latest, ubuntu-latest]
+    runs-on: ${{ matrix.os }}
     steps:
+      - uses: Homebrew/actions/setup-homebrew@master
       - uses: actions/checkout@v4
         with:
           fetch-depth: 0

coyote_test.go

@@ -45,16 +45,26 @@ func InitializeTestSuite(ctx *godog.TestSuiteContext) {
 }
 
 func InitializeScenario(ctx *godog.ScenarioContext) {
-	ctx.Given(`^coyote is present$`, coyoteIsPresent)
+	ctx.Given(`^coyote is present locally$`, coyoteIsPresentLocally)
+	ctx.Given(`^brew is present$`, brewIsPresent)
+
 	ctx.When(`^coyote is run with help option$`, coyoteIsRunWithHelpOption)
+	ctx.When(`^"(.+)" is installed using brew$`, formulaIsInstalledUsingBrew)
+
 	ctx.Then(`^help message is printed$`, helpMessageIsPrinted)
+	ctx.Then(`^coyote is installed$`, coyoteIsInstalled)
 }
 
-func coyoteIsPresent() error {
+func coyoteIsPresentLocally() error {
 	_, err := os.Stat("coyote")
 	return err
 }
 
+func brewIsPresent() error {
+	_, err := exec.LookPath("brew")
+	return err
+}
+
 func coyoteIsRunWithHelpOption(ctx context.Context) (context.Context, error) {
 	out, err := exec.Command("./coyote", "-h").Output()
 	if err != nil {
@@ -63,6 +73,14 @@ func coyoteIsRunWithHelpOption(ctx context.Context) (context.Context, error) {
 	return context.WithValue(ctx, ctxKey{}, string(out)), nil
 }
 
+func formulaIsInstalledUsingBrew(formula string) error {
+	cmd := exec.Command("brew", "install", formula)
+	if err := cmd.Run(); err != nil {
+		return err
+	}
+	return nil
+}
+
 func helpMessageIsPrinted(ctx context.Context) error {
 	actualOutput := ctx.Value(ctxKey{}).(string)
 
@@ -72,6 +90,11 @@ func helpMessageIsPrinted(ctx context.Context) error {
 	return fmt.Errorf("Result not as expected:\n%v", diff.LineDiff(expectedOutput, actualOutput))
 }
 
+func coyoteIsInstalled() error {
+	_, err := exec.LookPath("coyote")
+	return err
+}
+
 const expectedOutput = `NAME:
    coyote - Coyote is a RabbitMQ message sink.
 

features/help.feature

@@ -0,0 +1,6 @@
+Feature: Run coyote
+
+  Scenario: Coyote displays help message
+    Given coyote is present locally
+    When coyote is run with help option
+    Then help message is printed

features/install.feature

@@ -0,0 +1,6 @@
+Feature: Install coyote
+
+  Scenario: Homebrew installs coyote
+    Given brew is present
+    When "ghokun/tap/coyote" is installed using brew
+    Then coyote is installed