def test_negative(self): self.assertEqual(cube(-1), -1)
def test_one(self): self.assertEqual(cube(1), 1)
def test_two_three_four(self): self.assertEqual(cube(2), 8) self.assertEqual(cube(3), 27) self.assertEqual(cube(4), 64)
def test_zero(self): self.assertEqual(cube(0), 0)