Function TestShowRootCommandHelp_HelpPrinter

help_test.go:964–1021

(t *testing.T)

}

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

	tests := []struct {
		name         string
		template     string
		printer      HelpPrinterFunc
		wantTemplate string
		wantOutput   string
	}{
		{
			name:     "standard-command",
			template: "",
			printer: func(w io.Writer, _ string, _ any) {
				fmt.Fprint(w, "yo")
			},
			wantTemplate: RootCommandHelpTemplate,
			wantOutput:   "yo",
		},
		{
			name:     "custom-template-command",
			template: "{{doublecho .Name}}",
			printer: func(w io.Writer, templ string, data any) {
				// Pass a custom function to ensure it gets used
				fm := map[string]any{"doublecho": doublecho}
				DefaultPrintHelpCustom(w, templ, data, fm)
			},
			wantTemplate: "{{doublecho .Name}}",
			wantOutput:   "my-app my-app",
		},
	}

	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {
			defer func(old HelpPrinterFunc) {
				HelpPrinter = old
			}(HelpPrinter)
			HelpPrinter = func(w io.Writer, templ string, data any) {
				assert.Equal(t, tt.wantTemplate, templ, "unexpected template")
				tt.printer(w, templ, data)
			}

			var buf bytes.Buffer
			cmd := &Command{
				Name:                          "my-app",
				Writer:                        &buf,
				CustomRootCommandHelpTemplate: tt.template,
			}

			err := cmd.Run(buildTestContext(t), []string{"my-app", "help"})
			require.NoError(t, err)

			assert.Equal(t, tt.wantOutput, buf.String())
		})
	}
}