async def test_connect_and_serve_large(self):
        """
        Transfer enough data to require raising MAX_DATA and MAX_STREAM_DATA.
        """
        data = b"Z" * 2097152
        async with self.run_server() as server_port:
            response = await self.run_client(port=server_port, request=data)
            self.assertEqual(response, data)

        Transfer enough data to require raising MAX_DATA and MAX_STREAM_DATA.
        
tests/test_asyncio.py