Function TestFlagCompletionInGo

completions_test.go:1624–1715

(t *testing.T)

}

func TestFlagCompletionInGo(t *testing.T) {
	rootCmd := &Command{
		Use: "root",
		Run: emptyRun,
	}
	rootCmd.Flags().IntP("introot", "i", -1, "help message for flag introot")
	assertNoErr(t, rootCmd.RegisterFlagCompletionFunc("introot", func(cmd *Command, args []string, toComplete string) ([]string, ShellCompDirective) {
		completions := []string{}
		for _, comp := range []string{"1\tThe first", "2\tThe second", "10\tThe tenth"} {
			if strings.HasPrefix(comp, toComplete) {
				completions = append(completions, comp)
			}
		}
		return completions, ShellCompDirectiveDefault
	}))
	rootCmd.Flags().String("filename", "", "Enter a filename")
	assertNoErr(t, rootCmd.RegisterFlagCompletionFunc("filename", func(cmd *Command, args []string, toComplete string) ([]string, ShellCompDirective) {
		completions := []string{}
		for _, comp := range []string{"file.yaml\tYAML format", "myfile.json\tJSON format", "file.xml\tXML format"} {
			if strings.HasPrefix(comp, toComplete) {
				completions = append(completions, comp)
			}
		}
		return completions, ShellCompDirectiveNoSpace | ShellCompDirectiveNoFileComp
	}))

	// Test completing an empty string
	output, err := executeCommand(rootCmd, ShellCompNoDescRequestCmd, "--introot", "")
	if err != nil {
		t.Errorf("Unexpected error: %v", err)
	}

	expected := strings.Join([]string{
		"1",
		"2",
		"10",
		":0",
		"Completion ended with directive: ShellCompDirectiveDefault", ""}, "\n")

	if output != expected {
		t.Errorf("expected: %q, got: %q", expected, output)
	}

	// Check completing with a prefix
	output, err = executeCommand(rootCmd, ShellCompNoDescRequestCmd, "--introot", "1")
	if err != nil {
		t.Errorf("Unexpected error: %v", err)
	}

	expected = strings.Join([]string{
		"1",
		"10",
		":0",
		"Completion ended with directive: ShellCompDirectiveDefault", ""}, "\n")

	if output != expected {
		t.Errorf("expected: %q, got: %q", expected, output)
	}