def homog_compose_after_scale_test():
homog = HomogeneousTransform(np.array([[0, 1, 0],
[1, 0, 0],
[0, 0, 1]]))
s = Scale([3, 4])
res = homog.compose_after(s)
assert(isinstance(res, HomogeneousTransform))
assert_allclose(res.h_matrix, np.array([[0, 4, 0],
[3, 0, 0],
[0, 0, 1]]))
