def test_infinite():
    assert (Interval.gte(math.inf).is_empty is True)
    assert (Interval.gte((- math.inf)).is_empty is False)
    assert (Interval.lte(math.inf).is_empty is False)
    assert (Interval.lte((- math.inf)).is_empty is True)
def test_infinite():
    assert (Interval.gte(math.inf).is_empty is True)
    assert (Interval.gte((- math.inf)).is_empty is False)
    assert (Interval.lte(math.inf).is_empty is False)
    assert (Interval.lte((- math.inf)).is_empty is True)