Rails 3 plugin or gem testing resources?

Do you guys know of a good book or resource for gem or plugin development testing? Preferably dealing with Rails 3 and Bundler for dependencies.

Thanks!

Do you guys know of a good book or resource for gem or plugin
development testing? Preferably dealing with Rails 3 and Bundler for
dependencies.

you could take a look at rspec its something i am getting up to speed on: there is a beta book for it also http://rspec.info/

remember it's all ruby code at the end of the day you're testing!