def test_default_value(self):
            p = self.PersonModel()
            self.assertEqual(isinstance(p.mugshot, TestImageFieldFile), True)
            self.assertEqual(bool(p.mugshot), False)
Tests that the default value for an ImageField is an instance of
dataset/ETHPy150Open AppScale/appscale/AppServer/lib/django-1.2/tests/regressiontests/model_fields/imagefield.py/ImageFieldTwoDimensionsTests.test_default_value