pytest RuntimeError:事件循环是关闭的FastApi
每次在测试中尝试创建多个异步调用函数时，我都会收到一个错误RuntimeError: Event loop is closed。我已经尝试使用关于堆栈溢出的所有建议来重写event_loop fixture，但是没有任何效果。我想知道我错过了什么
运行测试命令：python -m pytest tests/ --asyncio-mode=auto
requirements.txt
pytest==7.1.2
pytest-asyncio==0.18.3
pytest-html==3.1.1
pytest-metadata==2.0.1test.py
async def test_user(test_client_fast_api):
assert 200 == 200
request_first = test_client_fast_api.post( # works fine
"/first_route",
)
request_second = test_client_fast_api.post( # recieve RuntimeError: Event loop is closed
"/second_route",
)conftest.py
@pytest.fixture()
def event_loop():
try:
loop = asyncio.get_running_loop()
except RuntimeError:
loop = asyncio.new_event_loop()
yield loop
loop.close()回答 2
Stack Overflow用户
发布于 2022-09-22 08:58:43
我花了一下午时间解决这个问题。我也试着从别人的代码中获得成功，这是我的代码。
将文件conftest.py添加到放置测试脚本的目录中。并编写以下代码。
import pytest
from main import app
from httpx import AsyncClient
@pytest.fixture(scope="session")
def anyio_backend():
return "asyncio"
@pytest.fixture(scope="session")
async def client():
async with AsyncClient(app=app, base_url="http://test") as client:
print("Client is ready")
yield client然后编写一个测试脚本test_xxx.py。
import pytest
from httpx import AsyncClient
@pytest.mark.anyio
async def test_run_not_exists_schedule(client: AsyncClient):
response = await client.get("/schedule/list")
assert response.status_code == 200
schedules = response.json()["data"]["schedules"]
schedules_exists = [i["id"] for i in schedules]
not_exists_id = max(schedules_exists) + 1
request_body = {"id": not_exists_id}
response = await client.put("/schedule/run_cycle", data=request_body)
assert response.status_code != 200
@pytest.mark.anyio
async def test_run_adfasdfw(client: AsyncClient):
response = await client.get("/schedule/list")
assert response.status_code == 200
schedules = response.json()["data"]["schedules"]
schedules_exists = [i["id"] for i in schedules]
not_exists_id = max(schedules_exists) + 1
request_body = {"id": not_exists_id}
response = await client.put("/schedule/run_cycle", data=request_body)
assert response.status_code != 200这是我自己的项目的真正测试代码。您可以将其更改为您的own.Finally，在项目的终端python -m pytest.If中运行，一切都进行得很顺利，应该没有问题，这可能涉及需要安装的库。
pytest
httpxStack Overflow用户
发布于 2022-10-06 06:11:32
是的，哇，我有一个和你的经历相似的下午
这是为我工作的事件循环夹具和TestClient模式：
from asyncio import get_event_loop
from unittest import TestCase
from async_asgi_testclient import TestClient
@pytest.fixture(scope="module")
def event_loop():
loop = get_event_loop()
yield loop
@pytest.mark.asyncio
async def test_example_test_case(self):
async with TestClient(app) as async_client:
response = await async_client.get(
"/api/v1/example",
query_string={"example": "param"},
)
assert response.status_code == HTTP_200_OK参考相关的GitHub问题：https://github.com/tiangolo/fastapi/issues/2006#issuecomment-689611040
请注意-我不知道我们如何使用基于类的测试。unittest.TestCase和asynctest.case.TestCase都不会为我工作。pytest-asyncio docs (https://pypi.org/project/pytest-asyncio/)声明：
不支持对标准单元测试库进行子类的测试类，建议用户使用unittest.IsolatedAsyncioTestCase或异步测试等异步框架。
https://stackoverflow.com/questions/72960518
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