def test_onlyRetryWithoutBody(self):
        """
        L{_RetryingHTTP11ClientProtocol} only retries queries that don't have
        a body.

        This is an implementation restriction; if the restriction is fixed,
        this test should be removed and PUT added to list of methods that
        support retries.
        """
        pool = client.HTTPConnectionPool(None)
        connection = client._RetryingHTTP11ClientProtocol(None, pool)
        self.assertTrue(connection._shouldRetry(b"GET", RequestNotSent(), None))
        self.assertFalse(connection._shouldRetry(b"GET", RequestNotSent(), object()))

        L{_RetryingHTTP11ClientProtocol} only retries queries that don't have
        a body.

        This is an implementation restriction; if the restriction is fixed,
        this test should be removed and PUT added to list of methods that
        support retries.
        
stackoverflow/venv/lib/python3.6/site-packages/twisted/web/test/test_agent.py