Is there an "assistant" for writing tests in Rails?

I would definitely like to write (more) tests for my projects. Unfortunately they often are a pain to setup, especially when a client needs rapid fixes/changes/results and there is no time to setup a test before coding.

Do you know of an assistant that helps setting up tests to make it more "fun"? Like a form you fill out and the assistant writes the whole FactoryGirl/Rspec-stuff?

Thanks for any ideas!