Aiologger incompatible with pytest

[zefciu]

To reproduce this bug, use the following code:

import sys                                                                     
                                                                               
import pytest                                                                  
from fastapi import FastAPI, APIRouter                                         
from httpx import AsyncClient                                                  
from starlette.requests import Request                                         
from aiologger.logger import Logger                                            
                                                                               
                                                                               
logger = Logger.with_default_handlers(name='my-logger')                        
                                                                               
                                                                               
app = FastAPI()                                                                
router = APIRouter()                                                           
                                                                               
                                                                               
@router.get('/')                                                               
async def homepage(request: Request):                                          
    await logger.info('Rendering the homepage')                                
    return {"message": "Hello World"}                                          
                                                                               
                                                                               
app.include_router(router)                                                     
                                                                               
                                                                               
                                                                               
@pytest.mark.asyncio                                                           
async def test_homepage():                                                     
    async with AsyncClient(app=app, base_url='http://my-page/') as client:     
        response = await client.get('/')                                       
    assert response.json()['message'] == 'Hello World'

After running pytest we get:

FAILED test.py::test_homepage - ValueError: Pipe transport is only for pipes, sockets and character devices

Note that if running pytest with the -s switch, the test passes. The issue is therefore with the pytest stdout capturing being incompatible with aiologger’s stream handler.

Because I’m not 100% sure, which side should really handle the issue, I will post the same ticket on both pytest and aiologger page.

[RonnyPfannschmidt]

from the pytest-dev/pytest#9119 i take the stance that aiologgewr is reponsible and uses a logging setup antipattern (which is to set up handlers at module/library level instead of the application startup

[19as]

Is there a workaround to make the tests work successfully without the -s flag?

[agronick]

Is there any solution for this?