Serenity BDD is an open source library that aims to make the idea of living documentation a reality.
Serenity BDD helps you write cleaner and more maintainable automated acceptance and regression tests faster. Serenity also uses the test results to produce illustrated, narrative reports that document and describe what your application does and how it works. Serenity tells you not only what tests have been executed, but more importantly, what requirements have been tested.
One key advantage of using Serenity BDD is that you do not have to invest time in building and maintaining your own automation framework.
Serenity BDD provides strong support for automated web tests using Selenium 2, though it also works very effectively for non-web tests such as tests that exercise web services or even call application code directly.
The aim of Serenity is to make it easy to quickly write well-structured, maintainable automated acceptance criteria, using your favourite BDD or conventional testing library. You can work with Behaviour-Driven-Development tools like Cucumber or JBehave, or simply use JUnit. You can integrate with requirements stored in an external source (such as JIRA or any other test cases management tool), or just use a simple directory-based approach to organise your requirements.
Up until November 2014, Serenity went by the name of Thucydides.