def test_point_ccw_iterable(A, B, C):
p = Point(*A)
q = Point(*B)
r = Point(*C)
assert p.ccw(q, C) > 0
assert p.ccw(B, r) > 0
assert p.ccw(B, C) > 0
def test_point_ccw_equal_zero():
p = Point()
q = Point(1, 0)
r = Point(2, 0)
assert p.ccw(q, r) == 0
def test_point_ccw_less_than_zero():
p = Point()
q = Point(1, 0)
r = Point(1, 1)
assert r.ccw(q, p) < 0
def test_point_ccw_greater_than_zero():
p = Point()
q = Point(1, 0)
r = Point(1, 1)
assert p.ccw(q, r) > 0
