Android: In-App-Purchase - how to test on a developer's device?

Question

Android

Immediately, I note that I read the official. documentation as well as several posts on stackoverflow, but could not figure out how to check on the developer's device.
As stated in the documentation, I created another mail account, added it to the Developer Console, and confirmed it.
Then I added it on my device (now there are two google accounts - main and test), I launch the application and all the time it pops up that Publisher cannot buy its products.
I noticed a line in the documentation that in order to change the primary e-mail on the device, you need to restore the factory settings - is it really impossible to do without it? I also added the application to the alpha version and installed it on my device ..
Or did I misunderstand something?
Please explain whether it is possible to check the purchase in the application yourself (checked static purchases, do not offer) on your device?
NOT ROOT

Answer 1

To check, make sure that:
- both the primary and current accounts are added as testers in the group of testers
- the installed application matches the one on the market
- a non-developer account is currently selected on the device in Google play
I also heard that the primary account is used to test payments via Alpha / Beta version devices. Not current, namely primary. But the above scheme seems to work.

Answer 2

You can put freedom on the device and test from any acc, the money will still not be written off :)