Dittos to etcshadow, but I'd like to add my two pfenning...

There is nothing WRONG with 'testing like a noob', but testing via the Test:: series of modules can make your testing much more thorough and comprehensive.

In my opinion, the biggest benefit of a nice suite of unit tests doesn't come during the development of a module or class, but afterwards. Having an easy-to-run set of tests that covers your code shields you from a lot of buggy side-effects that can be created when you are making changes after the initial development.