intercept calls to reverse(..) in tests

[Reikje]

Hi, I have a bunch of WebTest's which are using the reverse method
from django.core.urlresolvers to resolve a URL which the test should
call. Example:

url = reverse('webapp_home')
form = self.app.get(url).form

Now I need to add a query parameter to every url. This is to mimic a
Facebook request which will always have the signed_request query
parameter. So in theory I could just do this:

url = reverse('webapp_home') + "?
signed_request=vlXgu64BQGFSQrY0ZcJBZASMvYvTHu9GQ0YM9rjPSso.eyJhbGdvcml0aG0iOiJITUFDLVNIQTI1NiIsIjAiOiJwYXlsb2FkIn0"
form = self.app.get(url).form

This is an example of a signed_request from the Facebook
documentation. Since, I am a bit lazy, is there a way to sort of
intercept all calls to reverse and add the signed_request parameter
every time?

[Daniel Roseman]

You probably just want to monkeypatch urlresolvers.reverse in your test setUp methods. Something like this would probably work.

    from django.core import urlresolvers

    reverse_original = urlresolvers.reverse

    def reverse(*args, **kwargs):

        url = reverse_original(*args, **kwargs)

        url += whatever_you_want_to_add

        return url

    urlresolvers.reverse = reverse

--

DR.

[Reikje]

Excellent Daniel, thanks a lot.

[Reikje]

Okay I am having some troubles getting this to work. In my application
I am using WebTest and django-webtest to do template testing. In order
to monkeypatch the django.core.urlresolvers.reverse function, I have
created a new Test base that looks like this:

class FacebookWebTest(WebTest):

def __init__(self, methodName='runTest'):
super(FacebookWebTest, self).__init__(methodName)
import django.core.urlresolvers
django.core.urlresolvers.reverse = self.reverse

def reverse(*args, **kwargs):
return "foo"


Then hier is a test:

from django.core.urlresolvers import reverse

class HomepageViewTestCase(FacebookWebTest):

def testPopulateFieldsInitially(self):

url = reverse('webapp_home')
form = self.app.get(url).form

...

Within the HomepageViewTestCase it is still calling the original
reverse method in django.core.urlresolvers even though it is calling
the FacebookWebTest constructor before. Any suggestions :)

On Sep 7, 10:23 am, Daniel Roseman <dan...@roseman.org.uk> wrote:

[DrBloodmoney]

On Sat, Sep 17, 2011 at 7:47 AM, Reikje <reik....@gmail.com> wrote:
> Okay I am having some troubles getting this to work. In my application
> I am using WebTest and django-webtest to do template testing. In order
> to monkeypatch the django.core.urlresolvers.reverse function, I have
> created a new Test base that looks like this:
>
> class FacebookWebTest(WebTest):
>
>    def __init__(self, methodName='runTest'):
>        super(FacebookWebTest, self).__init__(methodName)
>        import django.core.urlresolvers
>        django.core.urlresolvers.reverse = self.reverse
>
>    def reverse(*args, **kwargs):
>        return "foo"
>
>
> Then hier is a test:
>
> from django.core.urlresolvers import reverse
>
> class HomepageViewTestCase(FacebookWebTest):
>
>    def testPopulateFieldsInitially(self):
>        url = reverse('webapp_home')
>        form = self.app.get(url).form
>        ...
>
> Within the HomepageViewTestCase it is still calling the original
> reverse method in django.core.urlresolvers even though it is calling
> the FacebookWebTest constructor before. Any suggestions :)

I usually monkey patch like so:

# myviews.py

from django.core.urlresolvers import reverse

def view(request):
blah blah
x = reverse('whaterrr')
return HttpResponse('monkey-patch')

# tests.py

import myviews

def patch_reverse(name):
return whatever_you_want

class MyViewTests(TestCase):

def setUp(self):
self.old_reverse = getattr(myviews, 'reverse')
myviews.reverse = patch_reverse

def tearDown(self):
myviews.reverse = self.old_reverse

Gets the job done