def test_3d_swap_axis0(self):
a = np.array([[[0, 1],
[2, 3]],
[[4, 5],
[6, 7]]])
b = np.array([[[4, 5],
[6, 7]],
[[0, 1],
[2, 3]]])
assert_equal(np.flip(a, 0), b)