def test_add_1(self): self.assertEqual(add(10, 10), 20)
def test_add_5(self): self.assertEqual(add(10, -50), -40)
def test_add_3(self): self.assertEqual(add(10, -10), 0)
def test_add_4(self): self.assertEqual(add(-10, 20), 10)
def test_add_2(self): self.assertEqual(add(-10, 10), 0)