Re: suggestion for dependency injection in view tests

Also, depending on your scenario, the classes might be overkill. You
could just as easily pass in a callable. In that case your view would
look something like this...

def suggest(request, usrid=None, get_friends=__get_friends):
    current_user = request.facebook.user
    facebook_friends = get_friends(current_user)

..and your test would look something like this...

def pretend_get_friends(current_user):
return [(2, 'John Doe'), (4, 'Jane Doe'), (5, 'The Frog')]

def test_suggest(self):
    request = some_hand_crafted_request()
    response = suggest(request, get_friends=pretend_get_friends)
    self.assertEqual(response.status_code, 200) # or whatever

--Stuart

On Oct 4, 9:18 am, Stuart <stu...@bistrotech.net> wrote:
> Here is one approach...
>
> class FBFriends:
>     def get_friends(self, current_user):
>         return __get_friends(current_user) # heavy call
>
> def suggest(request, usrid=None, friend_source=FBFriends()):
>     current_user = request.facebook.user
>     facebook_friends = friend_source.get_friends(current_user)
>
> Meanwhile, in tests.py...
>
> class FBFriendsMock:
>     def get_friends(self, current_user):
>         return [(2, 'John Doe'), (4, 'Jane Doe'), (5, 'The Frog')]
>
> def test_suggest(self):
>     request = some_hand_crafted_request()
>     response = suggest(request, friend_source=FBFriendsMock())
>     self.assertEqual(response.status_code, 200) # or whatever
>
> --Stuart
>
> On Oct 4, 7:34 am, Reikje <reik.sch...@gmail.com> wrote:
>
>
>
>
>
>
>
> > In one of my views, I am doing a call to the Facebook graph API which
> > is a bit heavyweight and you also need a valid token. I am looking
> > into ways to use mocking/dependency injection to avoid having to do
> > this call during view tests. So let's say i have this view method:
>
> > def suggest(request, usrid = None):
> >     current_user = request.facebook.user
> >     facebook_friends = __get_friends(current_user) # heavy call
>
> > during testing I want to use something simple:
>
> > def suggest(request, usrid = None):
> >     current_user = request.facebook.user
> >     facebook_friends = [(2, 'John Doe'), (4, 'Jane Doe'), (5, 'The
> > Frog')]
>
> > Any suggestion how to do mocking/DI from a view?

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