SCLUnit is a SAS/AF implementation of the xUnit unit testing framework, originally based on JUnit 3.2.
SCLUnit 3.0 is a rewritten implementation of SCLUnit that runs in SAS Version 9.1.
You can download SCLUnit 3.0 here: SCLUnit3_0.zip
The zip file contains a folder with the SCLUnit catalogs, a second folder with a small sample class and associated sample test case, and a sample setup file.
Additional documentation is in the SAS Global Forum 2008 paper #002-2008, Automated Unit Testing for SAS Applications, by Dave Scocca.