On 9 March 2012 06:15, Λlisue <lambdali...@hashnote.net> wrote: > I have the following codes for testing model and it's works correctly in > Django 1.3 + Python 2.7 without unittest2:: > > # in method of TestCase subclass ----------------------------------- > user1 = User.objects.create_user(username='user1', > email='us...@test.com', password='password') > user2 = User.objects.create_user(username='user2', > email='us...@test.com', password='password') > > self.assertItemsEqual(User.objects.all(), [user1, user2]) > #------------------------------------------------------------------- > > However the code raise ``AssertionError: Sequences differ: ...`` in > Django 1.3 + Python 2.6 or Django 1.3 + Python 2.7 + unittest2. (well > but I have no idea why the code above works with Django 1.3 + Python 2.7 > without unittest2)
Since 1.3 Django ships with unittest2 library (see django.utils.unittest), so if there are no other versions of unittest2 installed, it will use that (which is a verbatim copy of unittest2==0.5.1). Python 2.7 seems to have a bit different implementation of that method, but it uses things like Counter. > > This happen because unittest2 or whatever does ``sorted(expected_seq)`` > in ``assertItemsEqual`` method but they don't know how to sort the > instances of model class. Actually, assertItemsEqual handles unorderable and unhashable items, if you take a look at it's source code. The py2.7 version should too. Didn't have time to check this, but it looks like a bug in unittest2. > To solve this problem, I simply add > ``__cmp__`` method to Model class like:: > > # somewhere but called after Django has correctly configured ------- > from django.db.models import Model > > if not hasattr(Model, '__cmp__'): > Model.__cmp__ = lambda self, other: cmp(self._get_pk_val(), > other._get_pk_val()) > #------------------------------------------------------------------- > Apart from __cmp__ being deprecated, this isn't really correct even for testing (the model can have an UUIDField as it's pk instead of a sequential integer). For making assertions about QuerySets, there already is assertQuerysetEqual(), so -1 on adding __cmp__ to Model. -- Łukasz Rekucki -- You received this message because you are subscribed to the Google Groups "Django developers" group. To post to this group, send email to django-developers@googlegroups.com. To unsubscribe from this group, send email to django-developers+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/django-developers?hl=en.
