Trouble shooting online mobile leaderboard/social events?

Hi, what are some of the ways you guys troubleshoot online features such as leaderboards, achievements?

I’m looking for any way to help you figure out if things get stored correctly or not really… right now I’m taking my first steps into doing this and I’m concerned it’s going to take a while to get right…

At what stage will I be able to test it? If I get my game onto my mobile, deployed from the editor or packaged and transferred via iTunes (not via the store), I at least assume such online functions will work?

Can I cheat to see the written stats in some config somewhere maybe, like I can with a savedata file?