Django单元测试断言错误

Question

这是关于Django 1.6的内容

def test_perfil_password_validates_new_passwords(self):
    self.client.login(username='[e-mail]', password='test')
    resp = self.client.post('/perfil/password/',
                            json.dumps({'oldpassword': 'test',
                                        'newPassword1': 'wrong',
                                        'newPassword2': 'nuevo'}
                                       ),
                            'text/json',
                            HTTP_X_REQUESTED_WITH='XMLHttpRequest')
    self.assertEqual(resp.status_code, 400)

这个是可行的，下面是输出结果：

Creating test database for alias 'default'... .
---------------------------------------------------------------------- 
Ran 1 test in 0.273s

OK

现在如果我添加这个额外的断言。

self.assertContains(resp, '"error":')

Creating test database for alias 'default'... F
====================================================================== 
FAIL: test_perfil_password_validates_new_passwords (users.tests.PerfilLoggedTestCase)
----------------------------------------------------------------------  
Traceback (most recent call last):   File "/.../src/users/tests.py", 
line 141, in test_perfil_password_validates_new_passwords
    self.assertContains(resp, '"error":')   
File "/usr/local/lib/python2.7/dist-packages/django/test/testcases.py", line 327, 
in assertContains
    " (expected %d)" % (response.status_code, status_code)) 
AssertionError: Couldn't retrieve content: Response code was 400 (expected 200)

---------------------------------------------------------------------- 
Ran 1 test in 0.241s

FAILED (failures=1)

我不知道为什么这里期望返回200，也不知道为什么会报assertionError的错误。我甚至可以打印出内容，所以它确实存在。我错过了什么吗？

- osueboy

Answer 1

看了一下文档，似乎这个assert需要一个期望的状态码参数，默认为200：

TestCase.assertContains(response, text, count=None, status_code=200, msg_prefix='', html=False)

我猜测，你应该这样使用assert：

self.assertContains(resp, '"error":', status_code=400)

- mjgpy3