...
This is a description of the backend of the system tests. They consist of a perl module, several perl scripts and some root macros. The bulk of the original development was by Karl Young. You can find a copy of the documentation he wrote here. (as soon as I figure out how to add the link 
attached to this page (you'll notice that these pages bear some similarities to his work!)
The purpose of the GLAST SAS system tests is to provide and end to end test of the offline software. They are typically run for each tagged release of the GlastRelease and EngineeringModel packages.
...