I'm a unit-testing newbie, but I'm trying to get into it (as I realized, one day, how scared I was to change working code someone else wrote a long time ago). Trying to test some of my code using NUnit failed completely, since that code tried to cache stuff, and the calls to HttpContext.Current.Cache threw a null reference exception. Well, silly me, of course that wouldn't work. There's no HttpContext when the unit test is running (it's not running in a web application), and therefore no Cache object...