Django REST 单元测试 TypeError: __init__() 需要 1 个位置参数

Question

我正在使用命令启动以下代码$ python manage.py test，它返回错误：TypeError: __init__() takes 1 positional argument but 2 were given据我所知，我只是传递self给__init__ method，这个额外的 arg 来自哪里？我在这里检查了多个答案并查看了django 文档，但似乎找不到我的错误。这是什么原因造成的？代码：import requestsimport jsonfrom django.contrib.auth.models import Userfrom django.test import TestCasefrom django.test import Clientclass BasicFunctionality(TestCase):    def __init__(self):        user_name = 'boris_the_blade'        password = 'boris_the_sneaky_russian'        self.client = Client()        self.login_status = self.createUserAndLogin(user_name, password)    def createUserAndLogin(self, user_name, password):        self.user = User.objects.create_user(username=user_name, password=password)        login = self.client.login(username=user_name, password=password)        return login    def test_login(self):        self.assertTrue(self.login_status)全终端输出：Traceback (most recent call last):File "manage.py", line 15, in <module>    execute_from_command_line(sys.argv)File "/home/tompreston/.python_virtualenvs/lagoon-back-end-K1-2r-Ad/lib/python3.6/site-packages/django/core/management/__init__.py", line 381, in execute_from_command_line    utility.execute()File "/home/tompreston/.python_virtualenvs/lagoon-back-end-K1-2r-Ad/lib/python3.6/site-packages/django/core/management/__init__.py", line 375, in execute    self.fetch_command(subcommand).run_from_argv(self.argv)File "/home/tompreston/.python_virtualenvs/lagoon-back-end-K1-2r-Ad/lib/python3.6/site-packages/django/core/management/commands/test.py", line 26, in run_from_argv    super().run_from_argv(argv)File "/home/tompreston/.python_virtualenvs/lagoon-back-end-K1-2r-Ad/lib/python3.6/site-packages/django/core/management/base.py", line 316, in run_from_argv    self.execute(*args, **cmd_options)

Answer 1

不要覆盖在数据库中设置测试数据的__init__方法TestCase。使用setUp来代替。

def setUp(self):

    user_name = 'boris_the_blade'

    password = 'boris_the_sneaky_russian'

    self.client = Client()  # Django's TestCase already sets self.client so this line isn't required

    self.login_status = self.createUserAndLogin(user_name, password)