def test_code_option_color_diff(self) -> None:
        """Test the code option when color and diff are passed."""
        code = "print('hello world')"
        formatted = black.format_str(code, mode=DEFAULT_MODE)

        result_diff = diff(code, formatted, "STDIN", "STDOUT")
        result_diff = color_diff(result_diff)

        args = ["--diff", "--color", "--code", code]
        result = CliRunner().invoke(black.main, args)

        # Remove time from diff
        output = DIFF_TIME.sub("", result.output)

        assert output == result_diff, "The output did not match the expected value."
        assert result.exit_code == 0, "The exit code is incorrect."
Test the code option when color and diff are passed.
tests/test_black.py