'Regression test for #20242 - QuerySet "in" didn\'t work the first time
when using prefetch_related. This was fixed by the removal of chunked
reads from QuerySet iteration in
70679243d1786e03557c28929f9762a119e3ac14.'

def test_in_and_prefetch_related(self):

    qs = Book.objects.prefetch_related(u'first_time_authors')
    self.assertTrue((qs[0] in qs))
