Failed to run tests with flask templates on Windows and Mac

[v-jiaodi]

Describe the issue:
When test Running tests with flask templates on Windows and Mac, run python3 -m pytest, get error as follow:

Repro Steps:

1. Clone the repo to local.
2. Create a Python virtual environment and activate it.
3. Install requirements:
   python3 -m pip install -r requirements-dev.in
playwright install --with-deps
4. Run the tests: python3 -m pytest

Environment:

• OS: Windows and Mac.
• Azd version: 1.4.1 (commit Azure/azure-dev@1cbed85)
• Python : 3.9
• Template:
  https://github.com/Azure-Samples/azure-flask-postgres-flexible-aca
  https://github.com/Azure-Samples/azure-flask-postgres-flexible-appservice
  https://github.com/Azure-Samples/azure-flask-cosmos-postgres-aca
  https://github.com/Azure-Samples/azure-flask-cosmos-postgres-appservice
  https://github.com/Azure-Samples/azure-flask-postgres-addon-aca
  https://github.com/Azure-Samples/azure-flask-cosmos-mongodb-aca
  https://github.com/Azure-Samples/azure-flask-cosmos-mongodb-appservice

Expected behavior:
Running python3 -m pytest with flask templates can pass on Windows and Mac

@pamelafox for notification.

[pamelafox]

cc @kjaymiller I think we need to ditch pytest-flask given all the issues (and no 3.12 compat) and roll own. The pickle issue is discussed here: pytest-dev/pytest-flask#54

[kjaymiller]

We ditched pytest-flask in a recent update to the source.

I'll be updating the repos (sadly it's gonna be a manual job).

I'll check back in with later today.

[pamelafox]

@v-jiaodi Can you see if you are still having issues? We completely changed our local testing approach for Flask and I'm hopeful it'll now work on Windows.

[kjaymiller]

@pamelafox as I read this, did you mean that it WILL work on Windows?

[pamelafox]

Sorry, typo, it was meant to say "now work on Windows", not "not work on Windows". Thanks for clarifying Jay!

[v-jiaodi]

@v-jiaodi Can you see if you are still having issues? We completely changed our local testing approach for Flask and I'm hopeful it'll now work on Windows.

@pamelafox Test again, this issue still exists.

[pamelafox]

Can you share the exact error? It should be different since we changed testing package.

[v-jiaodi]

Error log as follow:

[pamelafox]

Great, thank you, I am working on a fix.

[pamelafox]

@v-jiaodi I have pushed a fix that should hopefully help for Windows, could you pull again and try?

[v-jiaodi]

@pamelafox Test again, the error message is as follows：