def test_get_prep_value(self):
field = UUIDField(primary_key=True)
self.assertTrue(field.primary_key == True)
value = field.get_prep_value(None)
self.assertTrue(value is None)
id = uuid.uuid4()
value = field.get_prep_value(id)
self.assertEqual(id, value)
def test_non_uuid_argument(self):
field = UUIDField()
with self.assertRaises(ValueError):
field.get_prep_value('not a uuid')
