Plugins for Test Helpers and Abstract Test Cases

I just released two Rails plugins that should make testing a little easier for some of you.

* The test_helpers plugin makes it easy to DRY up your test cases by
   moving shared code into modules. It includes the handy dandy
   "test_helper" class method to make requiring and including a snap.

* The abstract_testcases plugin makes it easy to create abstract
   testcases that don't complain about tests not being defined. If you'd
   rather not go the module route, this is the plugin for you.

Installation is just like any other Rails plugin:

   % script/plugin source
   % script/plugin install test_helpers
   % script/plugin install abstract_testcases

Comments and feedback are welcome.