RoboSpock combines two great test frameworks and lets you get the best of both - to run fast unit test written with Groovy on local JVM. It integrates well with Gradle build system and works with older Ant based projects.
JUnit is a simple framework to write repeatable tests. It is an instance of the xUnit architecture for unit testing frameworks.
JDave is a BDD framework for Java. It is inspired by rspec and integrates JMock 2 as mocking framework and Hamcrest as matching library. It uses JUnit adapter to launch JDave specifications. This way it is possible to have IDE, build tool and coverage tool support from day one.
JBehave is a framework for Behaviour-Driven Development (BDD). BDD is an evolution of test-driven development (TDD) and acceptance-test driven design, and is intended to make these practices more accessible and intuitive to newcomers and experts alike.