Granted I went through this a long time ago but I don't remember ever thinking "I wonder what this test is for?" Obviously if you are in the program it's for evidence of some form of drug/ETOH use.
Also back then we couldn't check our results and were only notified for a positive result. Just asking about a result from the lab or case manager would have been seen as relapse behavior and the questioned. What are you so worried about?"
In my mind if you are practicing total abstinance you should have no worry about what a test is for as in theory it doesn't matter because you will be clean.
I was so busy doing the requirements of the program so that I could get back to work that I didn't have time to think of anything else.
Anyway just wondering
Hppy