def METHOD_NAME(self):
    cell_method_strings = [
        "time: minimum within days (comment: 18h(day-1)-18h)",
        "time : minimum within days (comment: 18h(day-1)-18h)",
    ]
    expected = (
        CellMethod(
            method="minimum within days",
            coords="time",
            intervals=None,
            comments="18h(day-1)-18h",
        ),
    )
    for cell_method_str in cell_method_strings:
        res = parse_cell_methods(cell_method_str)
        self.assertEqual(res, expected)