title: Debug Ruby/Rails in test environment
body: <p>Because of this SO question <a href="https://stackoverflow.com/questions/16512114/stack-level-too-deep-systemstackerror-when-using-both-rspec-and-cucumber-with">here</a>, I would like to execute ruby code step-by-step while running rspec or cucumber.  Not only would I like to stop execution, but I would like to then proceed through the code, line by line.  </p>
  
  <p>Is there a best-practice-approach to step into code that is running while RAILS_ENV = 'test' ?  Is there any way to do this currently?</p>