Journal Testing and related Functions

Dear Sirs,
 
i have to do a test for a bank journal entries , does anyone have a list of Test related to JE and how to do it , and if u can provide me with a list of all custom functions
that can be used in IDEA software,
finally , i'm trying to test if some entries have been done on holidays , can someone help me on how to do it using IDEA.
 
thank you in advance.