What is the best way to test in-app purchases?

Question

Android

What is the most convenient way to test in-app purchases in an Android app? As far as I know, a test purchase for a tester is possible only once and cannot be rolled back. Sometimes the purchase cache in the device crashes and you have to buy again, however, when buying, Google reports that the purchase has already been made. And here two questions are brewing, is it possible to reset the cache for testing (say, in a rooted device) and how to avoid resetting in the release version of the application?
Thank you.

Answer 1

Where did you get such nonsense from? What root? What cache? The Developer Console has a "Gmail accounts with testing access" field in the Settings tab. You add the postal addresses of testers there, separated by commas, and they buy everything as usual, only Google does not charge money from a bank card.

Answer 2

You can download Freedom. The application allows you to bypass in app billing, i.e. you will be able to buy in your application whatever your heart desires. And the money won't go away.
And check the security of the application.