Fix tests

app.go

@@ -198,9 +198,11 @@ func (a *App) Setup() {
 	var newCommands []*Command
 
 	for _, c := range a.Commands {
-		if c.HelpName == "" {
+		cname := c.Name
-			c.HelpName = fmt.Sprintf("%s %s", a.HelpName, c.Name)
+		if c.HelpName != "" {
+			cname = c.HelpName
 		}
+		c.HelpName = fmt.Sprintf("%s %s", a.HelpName, cname)
 
 		c.flagCategories = newFlagCategoriesFromFlags(c.Flags)
 		newCommands = append(newCommands, c)

app_test.go

@@ -1914,12 +1914,12 @@ func TestApp_Run_CommandHelpName(t *testing.T) {
 
 	output := buf.String()
 
-	expected := "command foo bar - does bar things"
+	expected := "command custom bar - does bar things"
 	if !strings.Contains(output, expected) {
 		t.Errorf("expected %q in output: %s", expected, output)
 	}
 
-	expected = "command foo bar [command options] [arguments...]"
+	expected = "command custom bar [command options] [arguments...]"
 	if !strings.Contains(output, expected) {
 		t.Errorf("expected %q in output: %s", expected, output)
 	}

command.go

@@ -107,10 +107,6 @@ func (cmd *Command) Command(name string) *Command {
 }
 
 func (c *Command) setup(ctx *Context) {
-	if c.HelpName == "" {
-		c.HelpName = fmt.Sprintf("%s %s", ctx.parentContext.Command.HelpName, c.Name)
-	}
-
 	if c.Command(helpCommand.Name) == nil && !c.HideHelp {
 		if !c.HideHelpCommand {
 			c.Subcommands = append(c.Subcommands, helpCommand)

help_test.go

@@ -504,13 +504,13 @@ func TestShowSubcommandHelp_CommandAliases(t *testing.T) {
 
 func TestShowCommandHelp_Customtemplate(t *testing.T) {
 	app := &App{
+		Name: "foo",
 		Commands: []*Command{
 			{
 				Name: "frobbly",
 				Action: func(ctx *Context) error {
 					return nil
 				},
-				HelpName: "foo frobbly",
 				CustomHelpTemplate: `NAME:
    {{.HelpName}} - {{.Usage}}