On Which Features Should I Focus When Testing?

Dear XWiki users, The main task I have for the Google Summer of Code is to write functional tests for XWiki. And since XWiki has an impressive number of features it will be impossible for me to test everything in just 3 months. This means I will have to focus on the most important features; the ones users like you consider the most important. I only have a vague idea of which these features are, so your feedback on this would be most appreciated: http://www.xwiki.org/xwiki/bin/view/Idea/FunctionalTestPlanListing Thank you, Catalin Hritcu