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1. Build a Sinatra API Using TDD, Heroku, and Continuous Integration with Travis by Darren Jones. Published December 9, 2013 SitePoint
2. Código del artículo anterior https://github.com/crguezl/number_cruncher
3. Mini MiniTest Tutorial by Tim Millwood
4. sample app with sinatra rspec capybara and selenium by arunyadav4u January 9, 2013
5. NetTuts+ tutorial: Testing Web Apps with Capybara and Cucumber Andrew Burgess on Aug 22nd 2011 with 22 Comments
6. Testing sinatra helpers with rspec por netzfisch's. Enseña como testear un Sinatra helper.