I am finding trouble figuring out how to test a port of an app with in-app purchases from iOS to macOS using Catalyst and universal purchases. The iOS app—including IAP—is on the AppStore, having been tested on a physical device, since the simulator cannot test IAP.
Compiling for a macOS target, when disconnected from the network, everything works fine, since it's not communicating with the AppStore for IAP. When on the network, I've tried running directly in Xcode (see question here), through Finder, and the command line (always on my dev machine). I have successfully uploaded a macOS build the AppStore. About 5% of the time the macOS app will run, although I've only started—never finished—restoring a purchase made on the iOS app. I have tried all manner of deleting files and rebooting the dev machine. All contracts are signed and I have strong references for all of the necessary bits of the StoreKit. Still no consistent behavior for testing.
Is there documentation anywhere about testing in this sort of situation? Thanks!