Please help me setting up my Rails3 app testing tools

Question

Hello,

I'm starting a new rails 3 application, and I want it to be tested the better I can.

• This application is eavily based on plugins (wich will become gems later).
• One of this gem will be a proxy which talk with an API and outputs formatted data.
• Few plugins will process data sent by this proxy

My questions :

• Should I use cucumber for web tests only ?
• If so, should I use rspec to test my proxy ?
• To setup my test tools for the plugins, I should copy spec_help.rb, manually create features folder etc ... Is there a best way to do it ?

Thanks for answers / advices !