PIT is a fast bytecode based mutation testing system for Java that makes it possible to test the effectiveness of your unit tests. You can think of mutation testing as either as an automated test of your tests or as a much more in-depth form of code coverage. Unlike traditional line and branch coverage tools, PIT does not just confirm that your tests execute your code, it confirms that your tests are actually able to detect faults in it.
Test::Class provides a simple way of creating classes and objects to test your Perl code in an xUnit style. Built using Test::Builder, it was designed to work with other Test::Builder-based modules. You can easily package your tests as classes/modules rather than *.t scripts. This simplifies reuse, documentation, and distribution, encourages refactoring, and allows tests to be extended by inheritance.
Thread Weaver is a framework for writing multithreaded unit tests for Java classes. It lets you create breakpoints inside your code and to stop individual threads when they reach a breakpoint. This allows you to produce controlled repeatable tests that can help to verify thread safety and detect race conditions.
Mistletoe is a JUnit extension intended for integration testing. In technical terms, it is a JUnit test suite runner presenting the test results via HTTP as a Web page. Mistletoe, when incorporated within an application, will help diagnose integration issues. For example, an application that runs perfectly in the developer's environment may not run properly in the production environment due to configuration errors and connectivity issues. Instead of perusing log files, or looking at stack traces, mistletoe will run a user-specified series of tests and present the results in the form of a Web page served by the application itself. Since the tests are run within the context of the deployed application, given an appropriate test suite, you can home in on integration problems quickly and conveniently.
Enforcer is an exception simulation and fault injection tool for Java. In a typical test suite, many possible exceptions (such as for input/output) are not covered. Each method call that may throw exceptions may have an effect on the program, but systematic testing of this is hard. Enforcer will run all JUnit-based unit tests, analyze exception coverage, and re-run an instrumented version of your program which automatically tests all exceptions. Step by step, Enforcer generates exceptions at different code locations. This forces execution to go through previously uncovered exceptions. By analyzing the unit test structure first, Enforcer is much more efficient than other fault injection tools.
Beanoh (pronounced Bean-oh) is a simple tool for verifying your Spring context. It verifies that all of your beans are wired correctly, reconciles the beans marked with @Component in the classpath with the beans loaded in the Spring context, and prevents duplicate bean definition overwriting.