'Admin inline should invoke local callable when its name is listed in readonly_fields'

def test_callable_lookup(self):

    response = self.client.get('/test_admin/admin/admin_inlines/poll/add/')
    self.assertEqual(response.status_code, 200)
    self.assertContains(response, '<div    class="inline-group"    id="question_set-group">')
    self.assertContains(response, '<p>Callable    in    QuestionInline</p>')
