None and dont know the code coverage either. I think the perl modul tests cant be quite transfered to GUI programs, because most of those functions are callbacks from button and other controls and their behaviour depends on the current situation in the application and in some cases I can't test because I simply cant generate the neccesary case without actually pressing a mouse button (for example). Theire are even cases where the user can enter a Perl Regular Expression (or a sort function) that have to be evaled carefully. I know myself that the testing is a necesary process, but I think that automated testing mechanism create a false confidence, cause you never know what the user is going to to.