Python mock, django and requests

Question

So, I've just started using mock with a Django project. I'm trying to mock out part of a view which makes a request to a remote API to confirm a subscription request was genuine (a form of verification as per the spec I'm working to).

What I have resembles:

class SubscriptionView(View): def post(self, request, **kwargs): remote_url = request.POST.get('remote_url') if remote_url: response = requests.get(remote_url, params={'verify': 'hello'}) if response.status_code != 200: return HttpResponse('Verification of request failed')

What I now want to do is to use mock to mock out the requests.get call to change the response, but I can't work out how to do this for the patch decorator. I'd thought you do something like:

@patch(requests.get) def test_response_verify(self): # make a call to the view using self.app.post (WebTest), # requests.get makes a suitable fake response from the mock object

How do I achieve this?

Deadset on using mocks? There is also django.test.client.RequestFactory - docs.djangoproject.com/en/1.5/topics/testing/advanced/… — David
– David, Commented Apr 17, 2013 at 20:29
Just for future viewers, the questioner wanted to mock out an external API call. Not the call to the view itself. Mocks seem very sensible in that situation. — aychedee
– aychedee, Commented Jun 6, 2014 at 0:29
As per @aychedee this is indeed what I was aiming for with this question. — jvc26
– jvc26, Commented Jun 7, 2014 at 9:14

aychedee · Accepted Answer · 2013-04-17 23:30:47Z

You're almost there. You're just calling it slightly incorrectly.

from mock import call, patch @patch('my_app.views.requests') def test_response_verify(self, mock_requests): # We setup the mock, this may look like magic but it works, return_value is # a special attribute on a mock, it is what is returned when it is called # So this is saying we want the return value of requests.get to have an # status code attribute of 200 mock_requests.get.return_value.status_code = 200 # Here we make the call to the view response = SubscriptionView().post(request, {'remote_url': 'some_url'}) self.assertEqual( mock_requests.get.call_args_list, [call('some_url', params={'verify': 'hello'})] )

You can also test that the response is the correct type and has the right content.

Community · Accepted Answer · 2020-06-20 09:12:55Z

It's all in the documentation:

patch(target, new=DEFAULT, spec=None, create=False, spec_set=None, autospec=None, new_callable=None, **kwargs)

target should be a string in the form ‘package.module.ClassName’.

from mock import patch # or @patch('requests.get') @patch.object(requests, 'get') def test_response_verify(self): # make a call to the view using self.app.post (WebTest), # requests.get makes a suitable fake response from the mock object

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