Socket.IO test client does not run background task about flask-socketio HOT 7 CLOSED

I cannot reproduce. I have added a test based on your code to this repository to confirm that background tasks are working fine. See 84562cf.

Maybe your background task is crashing for some reason and does not run to completion?

from flask-socketio.

@miguelgrinberg thank you for your quick response. It does not work even my background job contains just logger call:

@socketio.on('connect', namespace='/namespace')
  def handle_connect():
      def background_task():
          app.logger.info('Background task started')

      socketio.start_background_task(background_task)

Additional info:
platform linux -- Python 3.8.11, pytest-6.2.5

from flask-socketio.

You can confirm yourself that a similar test just added to this repository passes. I'm really not sure how I can help, given that I cannot debug an issue that I cannot reproduce. You can compare your testing procedures against mine in this repository to help you determine what is causing this.

from flask-socketio.

@miguelgrinberg got it. I'll try to compare and debug more deeply. I'll send feedback as soon as I find the reason.

from flask-socketio.

@miguelgrinberg, our application uses eventlet async mode, so that's one difference when issue is reproducible.

app = Flask(__name__)

socketio = SocketIO(
    logger=True,
    engineio_logger=True,
    async_mode='eventlet'
)

socketio.init_app(app=app)

I tried different versions of eventlet but it does not help.

from flask-socketio.

@al-awsdev4 If you are using eventlet during your test run you need to ensure that all the packages that you use to support your tests are compatible with eventlet style concurrency. Not sure which test runner you are using, but I have no idea if unittest, pytest, nose, etc. can be used safely with eventlet. Even if you were able to make your tests work fine in the past, supporting eventlet for unit tests has never been a goal.

from flask-socketio.

@miguelgrinberg, thank you for clarifying. Issue can be closed since it's not related to Socket.IO test client.

from flask-socketio.