ddt运行报错AttributeError: type object 'TestLogin' has no attribute 'test_login'

#!usr/bin/python3
# -*- coding:utf-8 -*-
# @Time: 2018/12/17 下午2:07
# @File: do_excel.py
# @Software: PyCharm
import unittest
from api_auto.common.do_excel import DoExcel
from api_auto.common.do_excel import project_path
from api_auto.common.request import Request
import json
from ddt import ddt, data

do_excel = DoExcel(project_path.CASE_FILE)
cases = do_excel.get_cases("login")
# 测试登录
@ddt
class TestLogin(unittest.TestCase):

    def setUp(self):
        pass

    def tearDown(self):
        pass

    @data(*cases)
    def test_login(self, case):
        data_dict = json.loads(case.data)
        response = Request(method=case.method, url=case.url, data=data_dict)
        print("statue_code:", response.get_statue_code())
        try:
            self.assertEqual(case.expected, response.get_text())
        except AssertionError as e:
            print("断言错误")
            raise e