关于parameterized测试用例

def my_sum(a,b):
    a += 1
    b +=2
    return a+b

class TestSum2(unittest.TestCase):
    @parameterized.parameterized.expand([(1,1,5),(2,1,6),(0,0,3)])
    def test_001(self,x,y,z):
        number = my_sum(x,y)
        self.assertEqual(number,z)