How to Install and Run Yosemite in Parallels?
Yes - I've gotten installs of Yosemite to work on Parallels - but on a Mac Pro. I installed Yosemite fairly seamlessly from a Recovery HD - so you would want to install Yosemite onto an external drive (or SD media if your mac has one equipped) and then virtualize from the Recovery HD if you can't test well enough on a second install of OS X.