Smalltalk

SUnit is the mother of all unit testing frameworks, and serves as one of the cornerstones of test-driven development methodologies such as eXtreme Programming. It is a premier testing tool for Smalltalk, and one of the flagship Camp Smalltalk projects. A public-domain code base, SUnit allows one to write the tests and check results in Smalltalk; while this approach has the disadvantage that testers need to be able to write simple Smalltalk programs, the resulting tests are very stable.