'Test if updating an existing stored object doesn\'t erase the
object from the store.'

def test_store_resilience(self):

    test_object = make_object(Blob, data='data')
    self.store.add_object(test_object)
    test_object_id = test_object.id
    test_object.data = (test_object.data + 'update')
    stored_test_object = self.store[test_object_id]
    self.assertNotEqual(test_object.id, stored_test_object.id)
    self.assertEqual(stored_test_object.id, test_object_id)
