JsUnit is a Unit Testing framework for client-side (in-browser) JavaScript. It is essentially a port of JUnit to JavaScript. Also included is a platform for automating the execution of tests on multiple browsers and mutiple machines running different OSs. Its development began in January 2001.
Link to share this: https://gabrielserafini.com/blog/2005/09/30/jsunit-javascript-unit-testing-tool/