def test_equals(self):
     self.assertEqual(sum_nonnegative_logical_matrix(
         [[0, 0, 1], [1, 1, 0], [0, 0, 0]],
         [[0, 0, 1], [1, 1, 0], [0, 0, 0]]), 6)
 def test_equals(self):
     self.assertEqual(
         sum_nonnegative_logical_matrix([[0, 0, 1], [1, 1, 0], [0, 0, 0]], [[0, 0, 1], [1, 1, 0], [0, 0, 0]]), 6
     )
 def test_false_3(self):
     self.assertFalse(sum_nonnegative_logical_matrix(
         [[-1, 0], [-1, 0]], [[0, -1], [0, -1]]
     ))
 def test_false_3(self):
     self.assertFalse(sum_nonnegative_logical_matrix([[-1, 0], [-1, 0]], [[0, -1], [0, -1]]))