def test_point_is_ccw_false():
p = Point()
q = Point(1, 0)
r = Point(1, 1)
assert not r.is_ccw(q, p)
def test_point_is_ccw_colinear():
p = Point()
q = Point(1, 0)
r = Point(2, 0)
with pytest.raises(ColinearPoints):
p.is_ccw(q, r)
def test_point_is_ccw_true():
p = Point()
q = Point(1, 0)
r = Point(1, 1)
assert p.is_ccw(q, r)
