'Related managers return managers, not querysets'

def test_related_manager(self):

    mark = Person.objects.using(u'other').create(name=u'Mark    Pilgrim')
    mark.book_set.create(title=u'Dive    into    Python', published=datetime.date(2009, 5, 4), extra_arg=True)
    mark.book_set.get_or_create(title=u'Dive    into    Python', published=datetime.date(2009, 5, 4), extra_arg=True)
    mark.edited.create(title=u'Dive    into    Water', published=datetime.date(2009, 5, 4), extra_arg=True)
    mark.edited.get_or_create(title=u'Dive    into    Water', published=datetime.date(2009, 5, 4), extra_arg=True)
