def test_equal_1(self): self.assertEqual(sum_fracts([[1, 2], [1, 3], [1, 4]]), [13, 12])
def test_equal_2(self): self.assertEqual(sum_fracts([[1, 3], [5, 3]]), 2)
def test_is_none_1(self): self.assertIsNone(sum_fracts([[0, 2], [0, 2]]))