Here are a couple of tests:
Take a large towel or blanket and gently place it over your dog’s head. If he frees himself from the towel in less than 15 seconds, give him 3 points. If it takes 15–30 seconds, 2 points. Longer than 30 seconds earns 1 point.
Place a dog treat or a favorite toy under one of three buckets placed next to each other. Let the dog know which bucket the treat is under, than turn the dog away for a few seconds. Then, let her find the treat. If she immediately goes to the correct bucket give her 3 points. If she takes two attempts, score 2 points. If your dog looks under the other two buckets first, score 1 point.
Place a treat under a table or chair low enough so your dog can only fit her paw and cannot fit her head. If your dog figures how to reach the treat within one minute, score 3 points. If she uses her paws and nose, score 2 points. If your dog gives up, score 1 point.
There are more. See http://www.msnbc.msn.com/id/7087840/
Have fun. I got a cat btw and I agree with @Zendo !