Cancelling orders on Google Play IAB test purchases after June 20, 2016

Question

I have been using Google Play in-app purchases (IAPs) for a long time, but recently (June 20, 2016). They updated the Payments Merchant Center so that test purchases are not

Answer 1

If you use a similar way than TrivialDriveKotlin, I post an functional answer in this post https://stackoverflow.com/a/61141740/1568148