I've been following the Ruby on Rails Tutorial. The author uses Rspec/Capybara's Describe/It for the whole tutorial. But recently I've seen people using Feature/Scenerio instead. I wonder if Feature/Scenerio is a replacement of Describe/It or something that is used together? If it is a replacement, is there any reason of prefer it over Describe/It?
The same question came up to me lately too. And I went to Capybara's github page to read more about it (search for scenario). Apparently feature, scenario and background are just aliases to make acceptance tests more readable. And I guess that's for legacy reasons -- cucumber uses those keywords. Therefore by aliasing them, capybara acceptance specs read more like traditional cucumber specs.
So no, feature/scenario/background are not a replacement of describe/it/before. As a group of methods, it is only an alternative for acceptance specs. It's up to you and your team to decide which ones to go with.