def test_re_raise_passthrough(self):
        """DynamoDBError can re-raise itself if missing original exception"""
        err = DynamoDBError(400, Code="ErrCode", Message="Ouch", args={})
        caught = False
        try:
            err.re_raise()
        except DynamoDBError as e:
            caught = True
            self.assertEqual(err, e)
        self.assertTrue(caught)