PyTest Tornado：“SimpleAsyncHTTPClient”不可迭代

Question

尝试在 PyTest、Tornado 下制作用于长轮询的测试代码。

我的测试代码在下面。

conftest.py

from tornado.httpclient import  AsyncHTTPClient

@pytest.fixture

async def tornado_server():

    print("\ntornado_server()")

@pytest.fixture

async def http_client(tornado_server):

    client = AsyncHTTPClient()

    return client

@pytest.yield_fixture(scope='session')

def event_loop(request):

    loop = asyncio.get_event_loop_policy().new_event_loop()

    yield loop

    loop.close()

test_my.py

from tornado.httpclient import HTTPRequest, HTTPError

def test_http_client(event_loop):

    url = 'http://httpbin.org/get'

    resp = event_loop.run_until_complete(http_client(url))

    assert b'HTTP/1.1 200 OK' in resp

我希望这个结果以成功结束。但它失败了。

def test_http_client(event_loop):

    url = 'http://httpbin.org/get'

    resp = event_loop.run_until_complete(http_client(url))

   assert b'HTTP/1.1 200 OK' in resp E       TypeError: argument of type 'SimpleAsyncHTTPClient' is not iterable

我做错了什么？