Testing custom code

[Eileen]

I want to set up some tests for some of my custom code - in this case the code runs off the POST & the Build form hook.

I'm trying to figure out whether I should try to build the code in a way in which the test suite will run my tests as well (which would mean I could run it against various versions easily but I don't know how I'd make it know to call my drupal modules' hooks.

Or, maybe I'm better going down the route of using the test module that is used with drupal  - then I could test directly against my database with my data? (but not easily against upcoming versions of civi)