i'm about to finish my update on a game called WarpOut (available on App Store, check it out); this update includes Game Center functionalities.
I'm reporting high scores as well as achievements.
For now, it works on a Game Center Sandbox (as it is supposed to), and i've implemented code to postpone report whenever an error occurs while reporting.
My question is this : since the sandbox is local, how can i simulate an error to check if the postpone report works properly ?