Testing of in-app billing with test accounts

Question

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

Answer 1

It seems that Google has improved testability of in-app purchases so that you can test purchases with your products (not just the four reserved product ids) without charging your credit card:

When your In-app Billing implementation is ready, you can test purchasing of your in-app SKUs in two ways:

• Test purchases, which let your selected license test users purchase your in-app products before the app is published, but without any resulting charges to the user, and ...

http://developer.android.com/google/play/billing/billing_testing.html#testing-purchases