I think Francisco d'Anconia hit something on the head.
The necessity to know what exactly your looking for in a chick.
Maybe once you figure that out... the elements of how to test for such qualities will just come to you naturally.
Example...
I like open-minded chicks. So I'll often tell a little story, a dream, or some wile abstract idea/perspective, and then ask her a question about how she feels about it. Anything to get a take on her. Naturally whatever response she gives to such a scenario is going to express how open her mind is to such "openess"... lol
Another good thing I like about chicks is generosity.
I like a generous chick. So simple things, as in... does she offer me sh!t. A drink, a ride, a call to go to a party, a massage, anything. I'll just be looking for this quality in her behaivor.
So back to the point... fig. out what you like and want in a girl, and I think many of the perfect "sh!t tests" will come to you naturally.
SuaveOn'