func checkResult(result, expected string) error {
	resultFile, err := os.ReadFile(result)
	if err != nil {
		return fmt.Errorf("couldn't read result: %v", err)
	}
	expectedFile, err := os.ReadFile(expected)
	if err != nil {
		return fmt.Errorf("couldn't read expected: %v", err)
	}
	if !bytes.Equal(resultFile, expectedFile) {