Here are some links to tests:
BBC test - Test your happiness
Martin P. Seligman - Authentic Happiness Test
I'm working on setting up the test from "Making Slough Happy" and I'll keep you posted when this is ready.
Ultimately of course, you know deep down how happy you are, but even if you already feel happy, maybe there are changes you can make to be even happier! Instead of striving for that promotion or that new gadget, see what you can do to go straight to the source and get the happiness boost direct.