fix: show --help message for CLI errors, add tests for delete (#1403)

* feat(cli): add test for delete

This adds a new test for the `delete` command to ensure it works as
expected when provided the correct args.

* fix(cli): use ExecuteC() to match Cobra

This modifies the `cli.Root().Execute()` to `cli.Root).ExecuteC()` to
match the default behavior of Cobra. We do this so errors will always
print the "run --help" line.

* feat(cli): add WithoutParameters test for delete

This adds a new test to the `delete_test.go` suite to ensure the correct
behavior occurs when `delete` is called without an argument.

* fixup! feat(cli): add WithoutParameters test for delete

* refactor(cli): show --help error message on main

This adds an error message which shows when there is an error with any
commands called to improve the UX.

* fixup! refactor(cli): show --help error message on main

* refactor(cli): handle err with FormatCobraError

This adds a new helper function called `FormatCobraError` to `root.go`
so that we can colorize and add "--help" message to cobra command errors
like calling `delete`.

* refactor(cli): add root_test.go, move delete test

cli/delete_test.go

@@ -0,0 +1,38 @@
+package cli_test
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/require"
+
+	"github.com/coder/coder/cli/clitest"
+	"github.com/coder/coder/coderd/coderdtest"
+	"github.com/coder/coder/pty/ptytest"
+)
+
+func TestDelete(t *testing.T) {
+	t.Run("WithParameter", func(t *testing.T) {
+		t.Parallel()
+		client := coderdtest.New(t, nil)
+		user := coderdtest.CreateFirstUser(t, client)
+		coderdtest.NewProvisionerDaemon(t, client)
+		version := coderdtest.CreateTemplateVersion(t, client, user.OrganizationID, nil)
+		coderdtest.AwaitTemplateVersionJob(t, client, version.ID)
+		template := coderdtest.CreateTemplate(t, client, user.OrganizationID, version.ID)
+		workspace := coderdtest.CreateWorkspace(t, client, user.OrganizationID, template.ID)
+		coderdtest.AwaitWorkspaceBuildJob(t, client, workspace.LatestBuild.ID)
+		cmd, root := clitest.New(t, "delete", workspace.Name)
+		clitest.SetupConfig(t, client, root)
+		doneChan := make(chan struct{})
+		pty := ptytest.New(t)
+		cmd.SetIn(pty.Input())
+		cmd.SetOut(pty.Output())
+		go func() {
+			defer close(doneChan)
+			err := cmd.Execute()
+			require.NoError(t, err)
+		}()
+		pty.ExpectMatch("Cleaning Up")
+		<-doneChan
+	})
+}

cli/root.go

@@ -1,6 +1,7 @@
 package cli
 
 import (
+	"fmt"
 	"net/url"
 	"os"
 	"time"
@@ -259,3 +260,9 @@ func versionTemplate() string {
 	template += "\r\n"
 	return template
 }
+
+// FormatCobraError colorizes and adds "--help" docs to cobra commands.
+func FormatCobraError(err error, cmd *cobra.Command) string {
+	helpErrMsg := fmt.Sprintf("Run '%s %s --help' for usage.", cmd.Root().Name(), cmd.Name())
+	return cliui.Styles.Error.Render(err.Error() + "\n" + helpErrMsg)
+}

cli/root_test.go

@@ -0,0 +1,22 @@
+package cli_test
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/require"
+
+	"github.com/coder/coder/cli"
+	"github.com/coder/coder/cli/clitest"
+)
+
+func TestRoot(t *testing.T) {
+	t.Run("FormatCobraError", func(t *testing.T) {
+		t.Parallel()
+
+		cmd, _ := clitest.New(t, "delete")
+
+		cmd, err := cmd.ExecuteC()
+		errStr := cli.FormatCobraError(err, cmd)
+		require.Contains(t, errStr, "Run 'coder delete --help' for usage.")
+	})
+}

cmd/coder/main.go

@@ -14,12 +14,13 @@ import (
 
 func main() {
 	dadjoke()
-	err := cli.Root().Execute()
+	cmd, err := cli.Root().ExecuteC()
 	if err != nil {
 		if errors.Is(err, cliui.Canceled) {
 			os.Exit(1)
 		}
-		_, _ = fmt.Fprintln(os.Stderr, cliui.Styles.Error.Render(err.Error()))
+		cobraErr := cli.FormatCobraError(err, cmd)
+		_, _ = fmt.Fprintln(os.Stderr, cobraErr)
 		os.Exit(1)
 	}
 }