turnip

You can embed G/W/T into RSpec. There's a library called Turnip[0], a play on Cucumber, that extends the syntax to Feature tests in RSpec. - [0] https://github.com/jnicklas/turnip The reason RSpec didn't include this originally probably stems from the library being designed for testing at the class or module level, rather than an entire application.

The biggest gain of Cucumber I have seen is executable specifications. That is, every development task is described somewhere, whether it's pages and pages of a Google Doc or a couple lines in a Github issue. Code then gets implemented, and is almost certainly iterated over time. The question is, does the specification ever get updated to match the code's behavior? With Cucumber, you have a relatively clear specification (written in Gherkin's Given-When-Then syntax), and it always remains up-to-date because the developer needs to update it as corner cases or new scenarios arise. (Of course, this assumes you are running continuous integration with something like CircleCI and tracking code coverage with something like Coveralls.io.) I don't think there's anything magic about Cucumber, vs. Turnip <https://github.com/jnicklas/turnip>, or Spin