TestNG, written by Cedric Beust and Alexandru Popescu, is a light framework based on Java annotations (for J2SE 5.0) that allows you to design complex unit testing for J2SE 5.0 and J2SE 1.4.

InfoQ.com recently interviewed Next Generation Java Testing: TestNG and Advanced Concepts authors Hani Suleiman and Cédric Beust. InfoQ is also pleased to offer a chapter excerpt, "Mocks and Stubs".