def test_equal_2(self): self.assertEqual(candies([1, 2, 4, 6]), 11)
def test_equal_1(self): self.assertEqual(candies([5, 8, 6, 4]), 9)
def test_equal_4(self): self.assertEqual(candies([]), -1)
def test_equal_5(self): self.assertEqual(candies([1, 2, None, 3]), -1)
def test_equal_3(self): self.assertEqual(candies([1, 6]), 5)