def test_2(self): self.assertEqual(task.checkio(5, -5), 10)
def test_4(self): self.assertEqual(task.checkio(), 0)
def test_1(self): self.assertEqual(task.checkio(1, 2, 3), 2)
def test_3(self): self.assertEqual(task.checkio(10.2, -2.2, 0, 1.1, 0.5), 12.4)