def test_example(self):
grid = [
[1, 4, 5],
[2, 6, 7],
[3, 8, 9]
]
self.assertEqual(
search_2d_sorted(grid, 4),
(0, 1)
)
def test_simple_there(self):
self.assertEqual(
search_2d_sorted([[1]], 1),
(0, 0)
)
def test_simple_missing(self):
self.assertEqual(
search_2d_sorted([[2]], 1),
None
)
