Function captureOutput

cmd/checkmake/main_test.go:18–37

captureOutput temporarily redirects os.Stdout during f(), returning what was printed. Useful for testing formatters that write directly to os.Stdout instead of Cobra's writer.

(f func())

// captureOutput temporarily redirects os.Stdout during f(), returning what was printed.
// Useful for testing formatters that write directly to os.Stdout instead of Cobra's writer.
func captureOutput(f func()) string {
	var buf bytes.Buffer
	stdout := os.Stdout
	r, w, _ := os.Pipe()
	os.Stdout = w

	done := make(chan struct{})
	go func() {
		_, _ = io.Copy(&buf, r)
		close(done)
	}()

	f()

	w.Close()
	<-done
	os.Stdout = stdout

	return buf.String()
}

func TestCheckmake_NoArgsShowsHelp(t *testing.T) {
	out := captureOutput(func() {