def test_equal_2(self): self.assertEqual(closest_sum([5, 4, 0, 3], 3), 7)
def test_equal_4(self): self.assertEqual(closest_sum([-2, 2, -3, 1], 3), 1)
def test_equal_1(self): self.assertEqual(closest_sum([-1, 2, 1, -4], 1), 2)
def test_equal_3(self): self.assertEqual(closest_sum([1, 2, 3, 4], 4), 6)