def test_clean_false_required(self):
        f = forms.FileField(required=True)
        self.assertEqual(f.clean(False, 'initial'), 'initial')
        self.assertRaises(ValidationError, f.clean, False)
Non-overridden L{PubSubService.retract} yields unsupported error.
dataset/ETHPy150Open AppScale/appscale/AppServer/lib/django-1.4/tests/regressiontests/model_forms_regress/tests.py/FileFieldTests.test_clean_false_required--crossover with--dataset/ETHPy150Open ralphm/wokkel/wokkel/test/test_pubsub.py/PubSubServiceWithoutResourceTest.test_retract