async def METHOD_NAME(self):
    await self.transport.start()
    test_message = {"test": "message"}
    async with self.client.post("/", json=test_message) as resp:
        await resp.text()
    assert self.session is not None
    assert self.session.transport_type == "http"
    assert len(self.message_results) == 1
    assert self.message_results[0][0] == test_message
    await self.transport.stop()