How to test In-App purchases

Hello,

Is there any documentation on testing in-app purchases with pseudo/test app-store accounts and fake payment details?

I'll be submitting to TestFlight for internal and external users.

The users login to the app through their chosen social login provider and then need to subscribe through the app-store account.

Any info on testing this with "sandbox" data would be appreciated!
How to test In-App purchases
 
 
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