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djangosnippets

RequestFactory: Easily create mock request objects, for use in testing

Author:: simon
Posted:: August 12, 2008
Language:: Python
Version:: .96
Score:: 20 (after 20 ratings)

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Django's testing framework assumes you will be running your tests against "live" views that have been plugged in to your site's URL configuration - but sometimes you might want to run a test against a view function without first wiring it in to the rest of the site. This class makes it easy to do that by providing a "factory" for creating mock request objects, re-using the existing test Client interface (and most of the code). Once you've created a request object in your test you can use it to call your view functions directly, then run assertions against the response object that gets returned.

from django.test import Client
from django.core.handlers.wsgi import WSGIRequest
class RequestFactory(Client):
    """
    Class that lets you create mock Request objects for use in testing.
    
    Usage:
    
    rf = RequestFactory()
    get_request = rf.get('/hello/')
    post_request = rf.post('/submit/', {'foo': 'bar'})
    
    This class re-uses the django.test.client.Client interface, docs here:
    https://www.djangoproject.com/documentation/testing/#the-test-client
    
    Once you have a request object you can pass it to any view function, 
    just as if that view had been hooked up using a URLconf.
    
    """
    def request(self, **request):
        """
        Similar to parent class, but returns the request object as soon as it
        has created it.
        """
        environ = {
            'HTTP_COOKIE': self.cookies,
            'PATH_INFO': '/',
            'QUERY_STRING': '',
            'REQUEST_METHOD': 'GET',
            'SCRIPT_NAME': '',
            'SERVER_NAME': 'testserver',
            'SERVER_PORT': 80,
            'SERVER_PROTOCOL': 'HTTP/1.1',
        }
        environ.update(self.defaults)
        environ.update(request)
        return WSGIRequest(environ)

Comments

akaihola (on February 16, 2009):

What would be a good way to have request.user included? Just assign a User object to the created request? It would be nice to have AnonymousUser there by default.

akaihola (on February 16, 2009):

Answering myself, replace the last line with the following:

        request = WSGIRequest(environ)
        handler = BaseHandler()
        handler.load_middleware()
        for middleware_method in handler._request_middleware:
            if middleware_method(request):
                raise Exception("Couldn't create request mock object - "
                                "request middleware returned a response")
        return request

peterbe (on September 29, 2009):

Is this still sufficient? You cut away large chunks of Client.request I notice by checking the SVN version.

cooncesean (on February 24, 2011):

Wondering if there's any solution for sending this request to a view that has the @csrf_protect_m decorator.

cooncesean (on February 24, 2011):

@cooncesean: this looks like it works ->

....

request.csrf_processing_done = True

....

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RequestFactory: Easily create mock request objects, for use in testing

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