Actually probably not, but I’ve never tried it, so I’m not sure. It would depend on the enzymes in the test strip. The glucose in your “loogie” is bonded to protein still. It requires digestion to break down into simpler components your body can use… which is what text trips are designed to measure. I doubt the enzymes in test strips have the ability to break that carbohydrate group off, so it wouldn’t react similarly.
Also, if you really wanted to test this, you’d have to wash the saliva and contaminants off which can contain glucose your meter can measure.