Question

我试图嘲笑 django.core.urlresolvers.resolve 函数，但它似乎并不起作用。我已经使用自定义函数进行了测试，它就像魅力一样，但是mock会完全忽略 resolve 。

代码：

test_something.py：

class SomethingTestCase(TestCase)
    def setUp(self):
        self.middleware = SomeMiddleware()
        self.request = Mock()
        self.request.session = {}

    @patch('django.core.urlresolvers.resolve', side_effect=lambda: None)
    def test_something(self):
        self.assertEqual(self.middleware.process_request(self.request), None)

middleware.py

class SomeMiddleware(object):
    def process_request(self, request):
        app = resolve(request.path).app_name
        print('App name: {}'.format(app))

这会导致以下错误：

======================================================================
ERROR: test_process_request_unauthenticated (something.tests.unit.test_middleware.SomethingTestCase)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/home/user/virtualenv/something/local/lib/python2.7/site-packages/mock/mock.py", line 1305, in patched
    return func(*args, **keywargs)
  File "/home/user/projects/something/working/something/tests/unit/test_middleware.py", line 23, in test_process_request_unauthenticated
    self.assertEqual(self.middleware.process_request(self.request), None)
  File "/home/user/projects/something/working/something/middleware.py", line 14, in process_request
    app = resolve(request.path).app_name
  File "/home/user/virtualenv/something/local/lib/python2.7/site-packages/django/core/urlresolvers.py", line 534, in resolve
    return get_resolver(urlconf).resolve(path)
  File "/home/user/virtualenv/something/local/lib/python2.7/site-packages/django/core/urlresolvers.py", line 405, in resolve
    raise Resolver404({'path': path})
Resolver404: {u'path': u"<Mock name='mock.path' id='140678271233168'>"}

我的目标是让 resolve 函数返回我可以获取应用名称的内容。

为什么mock.patch无法覆盖解析函数？

Answer 1

首先，您正在错误的位置修补它。您应该在正在使用的文件中对其进行修补，而不是在运行修补程序之前导入目标代码的位置进行修补。

其次，如果模拟工作，它会在NoneType object has no attribute app_name的行上引发错误。

@patch(<path_to_middleware.py>, side_effect=lambda: type('mock', (object,), {'app_name': 1})):
def test_something(self):
    self.assertEqual(self.middleware.process_request(self.request), None)

Django单元测试：无法模拟django.core.urlresolvers.resolve

1 个答案: