How to test an in-app purchase of an iOS app
I have to test an iOS app for in-app purchase functionality. I'm doing it first time and I don't have any idea about it. So anyone please tell me the possible test area of it?
Firstly you need to become a member of Apple's developer program, and understand how in app purchase works. As a starting point you should look to Apple's documentation here: https://developer.apple.com/in-app-purchase/.
Apple provides sandbox environments to facilitate testing, and it is all covered in the documents and past WWDC sessions.
Once you understand that, you should develop test cases based on your product offerings and verify them with a test account.