To perform unit testing in JavaScript, use Unit.js. It is a cross-platform open-source unit testing framework.
Example
Let’s say the following in your test code −
var example = ‘Welcome’; test.string(example) .isEqualTo(‘Welcome’);
The function demo() displays a suit of tests, whereas demo1() is an individual test specification,
demo('Welcome’, function() { demo1('Welcome to the website', function() { var example = ‘Welcome’; test.string(example) .isEqualTo(‘Welcome’); }); });