I need to verify how my in-app billing works. Would like to test that with test accounts.
If I buy my in-app item with usage of test account, do I need to pay for it
Ok, I've tested that - even if test account is used, you have to buy your own item. Will check later on if it is possible to reverse amount paid (and if google 30% charge would be applied).
Upd. reversal is possible, the whole amount is reversed.