def METHOD_NAME(self, current_cycle):
    # Mock out the current_cycle so it doesn't change in the future
    current_cycle.return_value = 2016
    # Check that it returns the correct default when no arg supplied
    assert utils.get_cycles() == range(2016, 1979, -2)
    # Check that it returns the correct range when an arg is supplied
    assert utils.get_cycles(2020) == range(2020, 1979, -2)