RSpec has become a poster child for both Domain Specific Languages and Behavior Driven Development (BDD), a type of Test Driven Development. The new RSpec 1.1 release adds improved support for Rails and other improvements.
RSpec is a Behaviour-Driven Development acceptance testing framework for Ruby or Java that enables developers to turn acceptance specifications from the business into executable examples of expected behaviour. Dan North built a separate extension, RBehave, to express story-level integration tests with RSpec. David Chelimsky has now incorporated RBehave-like functionality into the RSpec trunk.
