def __init__(self, name, filename=None):
        self.name = name
        super(NamedRequirements, self).__init__(filename=filename)
def test_between_or_equal_to():
    """Greater than or equal to y and less than or equal to z."""
    p = are.between_or_equal_to(3, 3)
    ps = [p(x) for x in range(1, 6)]
    assert ps == [False, False, True, False, False]