def test_case_three(self):
"""Test case 3."""
out = im_utils.skel_kernels(3)
assert np.all(out == np.array([[0, 0, 0], [1, 1, 1], [0, 1, 0]]))
def test_case_four(self):
"""Test case 4."""
out = im_utils.skel_kernels(4)
assert np.all(out == np.array([[0, 1, 0], [1, 1, 0], [0, 1, 0]]))
def test_case_two(self):
"""Test case 2."""
out = im_utils.skel_kernels(2)
assert np.all(out == np.array([[0, 1, 0], [0, 1, 1], [0, 1, 0]]))
