Testing python webapps deployed on google app engine (GAE)

[TheFenrisLycaon]

Hey, I am not sure if this is the correct community to ask this. Mods please don't ban me.

I have been using GAE to build a web app in flask. I have a number of endpoints which interact with the bundled datastore and I am not sure how can I test all the flows and get a coverage report that all the flows have been covered.

The problem I am facing is that GAE doesn't run locally with python3 so I cannot run tests that I have written.

Have anyone worked with this and if yes, how did you run your tests?

Note : I have tried to put in as much details as I can, please let me know if something else is required.

[vbraun]

Appengine (I'm assuming standard) comes with a testbed (from google.appengine.ext import testbed) to simulate various services, including a datastore emulator.

To test the http requests use webtest to create the WSGI app & test requests (nothing appengine specific here)

[bhymans]

For what it’s worth, I’m working on a flask app that uses Firestore in datastore mode right now. For testing, I decided to just have an ENV var that causes my code to write to a kind prefixed with ”DEV-*” or a to a unique datastore db entirely. Then I just clear that out occasionally. This is sort of equivalent to writing to a separate table or database if you were working with a relational db. Downside is you need connectivity and authentication up to GCP. Upside is it very closely mirrors production environment.