Smalltalk is the home of a very early unit test framework, SUnit, which generated quite a few other frameworks. Kent Beck described it in his book Kent Beck's

Smalltalk is the home of a very early unit test framework, SUnit, which generated quite a few other frameworks. Kent Beck described it in his book Kent Beck's Guide to Better Smalltalk along with an earlier paper. http://swing.fit.cvut.cz/projects/stx/doc/online/english/tools/misc/testfram.htm http://swing.fit.cvut.cz/projects/stx/doc/online/english/too... http://sunit.sourceforge.net/ http://sunit.sourceforge.net/ https://en.wikipedia.org/wiki/SUnit https://en.wikipedia.org/wiki/SUnit