def __repr__(self):
        return "<NamedRequirements({}{})>".format(
            self.name,
            ", filename='{}'".format(self.filename.name) if self.filename
            else "")
def test_equal_to():
    """Equal to y."""
    p = are.equal_to(1)
    ps = [p(x) for x in range(1, 6)]
    assert ps == [True, False, False, False, False]