PAR Unit Test Studio 
The Enterprise Portal Unit Test Studio (UTS) plug-in is an extension of the PRT test framework that enables you to test portal applications directly from the developer environment. Using UTS you can:
· Create a new application project
· Create a PAR file from the project
· Display the result in the IDE
· Store the test result
· Compare the test result with the reference
Not all portal applications can be tested. The plug-in considers the application as suitable for testing as soon as the Testable property is set to true in the portal application deployment descriptor. The portal can contain many testable portal applications. You can include/exclude tests and to save the selection as a test suite.
The output of the PRT test framework is XML-based. The UTS is able to persist this XML output on the disk as a test result.
The main purpose of a test framework is to perform regression tests. This can be done by comparing a test result with a “reference” test result. Note that a “reference” test result is nothing other than a regular test result (no specific format). The preferences of the UTS plug-in enable you to specify and save the configuration of the servers containing the tests and the name of the folder for the result, test suite and reference.
See also:
Enterprise Portal Web Services Checker Plug-in