def test_scaling_a_ray():
# Given
r = Ray(Point(1, 2, 3), Vector(0, 1, 0))
m = scaling(2, 3, 4)
# When
r2 = r.transform(m)
# Then
assert r2.origin == Point(2, 6, 12)
assert r2.direction == Vector(0, 3, 0)
def test_translating_a_ray():
# Given
r = Ray(Point(1, 2, 3), Vector(0, 1, 0))
m = translation(3, 4, 5)
# When
r2 = r.transform(m)
# Then
assert r2.origin == Point(4, 6, 8)
assert r2.direction == Vector(0, 1, 0)