def test_counter_clockwise():
points = (0, 0), (100, 0), (50, 50)
assert orientation(*points) == -orientation(*reversed(points))
assert not clockwise(*points)
assert counter_clockwise(*points)
assert clockwise(*reversed(points))
assert not counter_clockwise(*reversed(points))
def test_orientation_2():
triangles = (
((3, 4), (5, 6), (9, 5), True),
((5, 6), (9, 5), (12, 8), False),
((9, 5), (12, 8), (5, 11), False),
((12, 8), (5, 11), (3, 4), False),
)
for *points, is_clockwise in triangles:
# = triangle
assert clockwise(*points) is is_clockwise
assert counter_clockwise(*points) is not is_clockwise
assert clockwise(*reversed(points)) is not is_clockwise
assert counter_clockwise(*reversed(points)) is is_clockwise
def test_orientation():
points = (5, 0), (6, 4), (4, 5)
assert counter_clockwise(*points)
assert clockwise(*reversed(points))