Testing IAP on android

Questions
#1

What is the quickest setup for testing IAP in the android app?

Currently, im following this steps:

  1. create new release in play console
  2. wait for the release to be published to testers
  3. test

This takes way to much time. Is there a way to quickly (locally?) test the functionality of IAP services in my game? How to effectively debug IAP parts of my game, without waiting?

#2

If i understand the last reply here: *HELP* -- trying to add IAP/IAB on my android game - #6 by britzl

i can test locally build apks. Will this work even thou I used google signing?

#3

As far as I know, you just need to publish your app to a test track once to register the app package id and then create your in-app products. After that you can test your app locally (of course with your real phone)

#4

Yes, it is also my understanding that this is still the way it works.