Pit is a fast bytecode based on a Java mutation test system, allowing it to perform your unit tests more efficiently. Mutation testing is either an automated test or a deeper code overlay. Unlike traditional line and branch coverage tools, Pit is not just about confirming testing and executing code, but it can actually detect your failures on the test.
PIT 0.24 This version updates support for Jmockit, making known only mutation detection systems compatible with all major mocking frameworks (Mockito,easymock,jmock,powermock and Jmockit). In addition, an improved inline consts mutation operator is also included to fix the defect 11 (the default source file in the package is not shown in the correct report) and to select the output of the mutation in XML or CSV format.
Software Information: http://pitest.org/
Download Address: http://code.google.com/p/pitestrunner/downloads/detail?name=pitest-0.24.jar&can=2&q=