如何测试新的 Django 1.10+ MIDDLEWARE 类答案

【问题标题】：How to test new Django 1.10+ MIDDLEWARE classes如何测试新的 Django 1.10+ MIDDLEWARE 类
【发布时间】：2018-01-05 10:30:18
【问题描述】：

我正在将现有的中间件升级到新风格的 1.10+ Django 中间件。

以前是这样的：

class ThreadLocalMiddleware(MiddlewareMixin):
    """ Simple middleware that adds the request object in thread local storage."""

    _thread_locals = local()

    def process_request(self, request):
        _thread_locals.request = request

    def process_response(self, request, response):
        if hasattr(_thread_locals, 'request'):
            del _thread_locals.request
        return response

    def process_exception(self, request, exception):
        if hasattr(_thread_locals, 'request'):
            del _thread_locals.request

改写成新样式后：

class ThreadLocalMiddleware:

    _thread_locals = local()

    def __init__(self, get_response=None):
        self.get_response = get_response

    def __call__(self, request):
        _thread_locals.request = request

        response = self.get_response(request)

        if hasattr(_thread_locals, 'request'):
            del _thread_locals.request
        return response

    def process_exception(self, request, exception):
        if hasattr(_thread_locals, 'request'):
            del _thread_locals.request

我的问题是如何对中间件在_thread_locals 中设置request 进行单元测试？以前在我的单元测试中调用process_request 方法很简单。现在我只有 __call__ 方法，它会在最后删除变量。

查看 django 中间件测试，他们仍然使用向后兼容的类允许他们保留旧测试，我想知道他们将它删除后将如何测试它。

【问题讨论】：

标签： python django testing django-middleware

【解决方案1】：

最后我使用了类似的测试。 get_response_callback 在中间件的预请求工作完成后被调用。

def test_middleware():

    def get_response_callback(req):
        assert ThreadLocalMiddleware._thread_locals.request

    middleware = ThreadLocalMiddleware(get_response_callback)
    request = RequestFactory().get('/')
    request.user = AnonymousUser()

    middleware(request)
    assert hasattr(ThreadLocalMiddleware._thread_locals, 'request') == False

【讨论】：