Are they supposed to? They would have told you what you are subject to testing for as terms of your probation.

When they call you in for a test you will know they are.

Is no use of alcohol part of the probation, if it is, then yes you can assume they will test. If you are not restricted from drinking, there would be no use for a test.

I don't recall ever being told that they would test for alcohol. All they asked for at my ua was the medication I was currently taking.

So basically, if I'm not made aware of that type of test I can assume it's not part of the procedure?