Function TestShowCommandHelp_HelpPrinterCustom

help_test.go:575–653

(t *testing.T)

}

func TestShowCommandHelp_HelpPrinterCustom(t *testing.T) {
	doublecho := func(text string) string {
		return text + " " + text
	}

	testCases := []struct {
		name         string
		template     string
		printer      HelpPrinterCustomFunc
		arguments    []string
		wantTemplate string
		wantOutput   string
	}{
		{
			name: "no command",
			printer: func(w io.Writer, _ string, _ any, _ map[string]any) {
				fmt.Fprint(w, "yo")
			},
			arguments:    []string{"my-app", "help"},
			wantTemplate: RootCommandHelpTemplate,
			wantOutput:   "yo",
		},
		{
			name: "standard command",
			printer: func(w io.Writer, _ string, _ any, _ map[string]any) {
				fmt.Fprint(w, "yo")
			},
			arguments:    []string{"my-app", "help", "my-command"},
			wantTemplate: CommandHelpTemplate,
			wantOutput:   "yo",
		},
		{
			name:     "custom template command",
			template: "{{doublecho .Name}}",
			printer: func(w io.Writer, templ string, data any, _ map[string]any) {
				// Pass a custom function to ensure it gets used
				fm := map[string]any{"doublecho": doublecho}
				DefaultPrintHelpCustom(w, templ, data, fm)
			},
			arguments:    []string{"my-app", "help", "my-command"},
			wantTemplate: "{{doublecho .Name}}",
			wantOutput:   "my-command my-command",
		},
	}

	for _, tc := range testCases {
		t.Run(tc.name, func(t *testing.T) {
			r := require.New(t)

			defer func(old HelpPrinterCustomFunc) {
				HelpPrinterCustom = old
			}(HelpPrinterCustom)

			HelpPrinterCustom = func(w io.Writer, tmpl string, data any, fm map[string]any) {
				r.Nil(fm)
				r.Equal(tc.wantTemplate, tmpl)

				tc.printer(w, tmpl, data, fm)