iOS StoreKit - simulating incomplete and interrupted in-app purchases

Question

I have an issue with a live app where incomplete purchases are being mishandled. I am trying to test my new code to make sure that this will be taken care of, so I download the live app, cause the problem, then load my development app (or Ad-Hoc app) hoping that the StoreKit Observer will catch the incomplete purchase notification. No matter how I do this (development or Ad-Hoc) the observer does not fire a notification.

My general question is: How can I simulate incomplete and interrupted purchases in the App Store testing environment?

My more specific question is: Can I simulate the specific issue where the user must leave the app to confirm their current credit card pin number on the app store?

Answer 1

According to this helpful page:

Test an Interrupted Transaction

Set a breakpoint in your transaction queue observer’s paymentQueue:updatedTransactions: method so you can control whether it delivers the product. Then make a purchase as usual in the test environment, and use the breakpoint to temporarily ignore the transaction—for example, by returning from the method immediately using the thread return command in LLDB. Terminate and relaunch your app. Store Kit calls the paymentQueue:updatedTransactions: method again shortly after launch; this time, let your app respond normally. Verify that your app correctly delivers the product and completes the transaction.

Hope this helps someone.

Answer 2

To your general question:

SKPaymentTransaction provides several transaction states like SKPaymentTransactionStateFailed According to the Documentation you can check out the error property to see what happened. For example you can check it in -(void)paymentQueue:(SKPaymentQueue *)updatedTransactions:(NSArray *)transactions callback like so

-(void)paymentQueue:(SKPaymentQueue *)queue updatedTransactions:(NSArray *)transactions{
    for (SKPaymentTransaction * transaction in transactions) {
        switch (transaction.transactionState)
        {
            case SKPaymentTransactionStateFailed:
                ...
                break;
            default:
                break;
        }
    };
}

Hope this helps.