多个异步单元测试失败，但运行它们一个接一个地通过

Question

我有两个单元测试，如果我运行一个一个地测试它们，它们就会通过。如果我运行他们在 class 级别，一个通过，另一个在 response = await ac.post( 失败，错误消息：RuntimeError: Event loop is closed

@pytest.mark.asyncio
async def test_successful_register_saves_expiry_to_seven_days(self):
    async with AsyncClient(app=app, base_url="http://127.0.0.1") as ac:
        response = await ac.post(
            "/register/",
            headers={},
            json={
                "device_id": "u1",
                "device_type": DeviceType.IPHONE.value,
            },
        )
        query = device.select(whereclause=device.c.id == "u1")
        d = await db.fetch_one(query)
        assert d.expires_at == datetime.utcnow().replace(
            second=0, microsecond=0
        ) + timedelta(days=7)

@pytest.mark.asyncio
async def test_successful_register_saves_device_type(self):
    async with AsyncClient(app=app, base_url="http://127.0.0.1") as ac:
        response = await ac.post(
            "/register/",
            headers={},
            json={
                "device_id": "u1",
                "device_type": DeviceType.ANDROID.value,
            },
        )
        query = device.select(whereclause=device.c.id == "u1")
        d = await db.fetch_one(query)
        assert d.type == DeviceType.ANDROID.value

我已经尝试了几个小时，请问我遗漏了什么？

Answer 1

我找到了解决方案。

在 tests

下创建一个名为 conftest.py 的文件

并插入以下内容：

@pytest.yield_fixture(scope="session")
def event_loop(request):
    """Create an instance of the default event loop for each test case."""
    loop = asyncio.get_event_loop_policy().new_event_loop()
    yield loop
    loop.close()

这将在每次测试后正确结束循环并允许多个运行。

多个异步单元测试失败，但运行它们一个接一个地通过

Multiple async unit tests fail, but running them one by one will pass

python

pytest

pytest-asyncio

fastapi

python-3.9

多个异步单元测试失败，但 运行 它们一个接一个地通过

Multiple async unit tests fail, but running them one by one will pass

python

pytest

pytest-asyncio

fastapi

python-3.9

多个异步单元测试失败，但运行它们一个接一个地通过