Facebook share

I have a quick question about using Facebook to post messages and app store links etc by clicking on a button during the game over screen using Corona SDK and LUA.

 

I understand that I need to get a fbAppID in order to use Facebook share but can I use it with a unfinished app, just for testing on device whether the Facebook share feature works properly? 

Do I also need to get my app approved by Facebook in order to use it? won’t that require the game to be finished and ready for launch?

 

If anyone has any good tutorials or useful tips on getting this feature to work then id love to hear it. I really wanna use this feature in my game but am very confused in the different methods that need to be done correctly, and when so.

Im reading the Ghost vs Monsters sample code to get a rough idea but am still confused on the Facebook developer side of things.

 

thanks.