New on the ZendCasts.com site there's a screencast showing you how to unit test Doctrine 2 entities.
His example came from a webinar recently presented by Zend to integrate unit testing with the help of the Symfony console. He shows how to set up a configuration (sans yaml) in your Zend Framework application's setup and a bootstrap to get them all working together.
This screencast is about 45 minutes long and, if you'd like more information on unit testing with the Zend Framework, check out the side bar for looks at testing with Zend_Form and action helpers.