def test_mat_from_vecs(self):
v1 = Vec(1, 2, 3)
v2 = Vec(4, 5, 6)
mat = Mat(v1, v2)
correct = Mat([
[1, 2, 3],
[4, 5, 6]
])
self.assertEqual(mat, correct)
v1.z = 39
v2.y = 25
correct = Mat([
[1, 2, 39],
[4, 25, 6]
])
self.assertEqual(mat, correct)
