The JT harness is based on Oracle's JavaTest harness. The JT harness is a general purpose, fully-featured, flexible, and configurable test harness very well suited for most types of unit testing. Originally developed as a test harness to run TCK test suites, it has since evolved into a general purpose test platform.

The JT harness:

• Is designed to configure, sequence, and run test suites that consist of many (100,000 or more) discrete, independent tests. It is especially good at testing APIs and compilers.
• Can be used to run tests on all of the Java platforms, from the Java Card platform, to the Java Platform, Enterprise Edition ("Java EE").
• Enables you to create test suites that are self-contained products that customers can easily configure and run.

For more information read the JT harness whitepaper (PDF), and run the JT Harness Tutorial.

JT harness technology is being opened in order to develop a community that will improve it, further its development, and use it to develop test suites. We encourage you to browse, download, contribute, and get involved.

News and Announcements

JTHarness 4.4 Feature Release (June 24, 2011)
The JT harness 4.3 release is a feature release. It fixes bugs and it contains the following notable changes:

• Known failures lists - The known failures list (KFL) allows you to specify one or more files that contain the names of tests that are known to result in a Failed status when executed. When you supply this list of tests to the harness, it can generate an HTML report that includes a section that can help you identify tests that report an unexpected result.
• Case-sensitive exclude lists - Historically the matching of test names in an exclude list is case-insensitive, although case is preserved by the harness internally. Matching can now be case sensitive if the javatest.caseSensitiveJtx system property is set to "true".

JT harness 4.4 is compatible with JT harness 4.3. For more information, see the release notes on the download page.

The JTHarness project moved to Kenai (January 27, 2011)

JTHarness 4.3 Feature Release (December 28, 2010)
The JT harness 4.3 release is a feature release. It fixes bugs and it contains the following notable changes:

• MDI and SDI window layout styles are no longer available.The tabbed window layout style is now the only available user interface.
• GUI colors are now partially configurable in the Preferences dialog. Other settings are still available via command line.
• During start-up, more information is provided to show progress.
• Saving of previous desktop is now disabled by default (was enabled previous to this release).
• Usability improved in the main test tree. Can select and right-click to choose from a context menu.

JT harness 4.3 is compatible with JT harness 4.2. For more information, see the release notes on the download page.

Classpath Exception Added to License (November 6, 2007)
In response to requests from the community, the JT harness project has added the classpath exception to its GPL2 license. The addition of the classpath exception allows a greater opportunity for community members to produce and distribute products based on the software in this project. The classpath exception allows members to link the software in these projects to an independent application to produce an executable, regardless of the license terms of the independent application, and to copy and distribute the resulting executable under terms of their choice, provided that they also meet, for each linked independent application, the terms and conditions of the license of that application. The produced executable would not be subject to the GPL requirement that it be offered to the public under the GPL.

For more information see the JT harness FAQ.

Related Projects and Links

This section contains links to technologies and blogs that are related to the JT harness technology.

JavaTest Harness

JT Harness Extensions

Blogs