def test_get_diagonal1(self):
self.assertEqual(
solution(
# matrix
[[1, 2],
[3, 4]]),
# output
[[1],
[2, 3],
[4]])
def test_get_diagonal2(self):
self.assertEqual(
solution(
# matrix
[[1, 2, 3],
[4, 5, 6],
[7, 8, 9]]),
# output
[[1],
[2, 4],
[3, 5, 7],
[6, 8],
[9]])
def test_get_diagonal_single(self):
self.assertEqual(solution([[4]]), [[4]])
