def test_mul(self):
a = Matrix33.identity()
b = Matrix33.scaling(0.5, 0.5)
c = a * b
self.assertEqual((c.m00, c.m01, c.m10, c.m11), (0.5, 0.0, 0.0, 0.5))
def test_scaling(self):
matrix = Matrix33.scaling(0.5, 0.5)
vector = matrix.transform(Vector2(1.0, 1.0))
self.assertEqual((vector.x, vector.y), (0.5, 0.5))
