add test for help command

README.md

@@ -101,5 +101,5 @@ Generate Certificate
 2. Add cert template format read from yaml file
 3. Add verification of a CA and http endpoint
 4. Add test for utils package
-5. Add test for help package
-6. Add certificate converter command like DER to PEM etc.
+5. Add certificate converter command like DER to PEM etc.
+6. Add Homebrew formula for MacOS (help wanted)

commands/help/help.go

@@ -28,9 +28,5 @@ func Action(c *cli.Context) error {
 	} else {
 		err = cli.ShowCommandHelp(c, c.Args().First())
 	}
-	if err != nil {
-		return err
-	}
-
-	return nil
+	return err
 }

commands/help/help_test.go

@@ -0,0 +1,30 @@
+package help_test
+
+import (
+	"os"
+	"testing"
+
+	"github.com/yakuter/gossl/commands/help"
+	"github.com/yakuter/gossl/commands/key"
+
+	"github.com/stretchr/testify/require"
+	"github.com/urfave/cli/v2"
+)
+
+func TestHelp(t *testing.T) {
+	execName, err := os.Executable()
+	require.NoError(t, err)
+
+	app := &cli.App{
+		Commands: []*cli.Command{
+			help.Command(),
+			key.Command(),
+		},
+	}
+
+	testArgs := []string{execName, "help"}
+	require.NoError(t, app.Run(testArgs))
+
+	testArgs = []string{execName, "help", "key"}
+	require.NoError(t, app.Run(testArgs))
+}