In this course, weΓÇÖll build a relatively simple Rails application, using behavior-driven development. Along the way, youΓÇÖll learn how to write Cucumber features and use them for acceptance testing, how to test-drive Rails views, controllers and models with the help of Rspec, and much more. YouΓÇÖll learn a lot, so, if youΓÇÖre ready, letΓÇÖs get started!

More info: 
https://tutsplus.com/course/bdd-rails-application/