def test_bool(self):
        prio_set_list = event._PrioritizedSetList()

        assert bool(prio_set_list) is False

        prio_set_list.add(0, None)
        assert bool(prio_set_list) is True
def test_below_or_equal_to():
    """Less than or equal to y."""
    p = are.not_below_or_equal_to(3)
    ps = [p(x) for x in range(1, 6)]
    assert ps == [False, False, False, True, True]