QUnit

Not to be confused with Quantum units (QuNit).
QUnit
Initial release8 May 2008 (2008-05-08)
Stable release
2.26.0[1] Edit this on Wikidata / 1 June 2026; 3 days ago (1 June 2026)
Written inJavaScript
TypeTest automation framework
LicenseMIT
Websitequnitjs.com
Repository

QUnit is a JavaScript framework for unit testing. Originally developed for testing jQuery, jQuery UI and jQuery Mobile, it is a generic framework for testing any JavaScript code. It supports client-side environments in web browsers, and server-side (e.g. Node.js).

QUnit's assertion methods follow the CommonJS unit testing specification, which itself was influenced to some degree by QUnit.

History

John Resig originally developed QUnit as part of jQuery. In 2008 it was extracted from the jQuery unit test code to form its project and became known as "QUnit". This allowed others to start using it for writing their unit tests. While the initial version of QUnit used jQuery for interaction with the DOM, a rewrite in 2009 made QUnit completely standalone.

A 2017 analysis of npm and GitHub code repositories showed QUnit was the third most prevalent framework, with half as much usage as the most popular framework, Mocha.[2]

Usage and examples

  • QUnit.module(string) - Defines a module, a grouping of one or more tests.
  • QUnit.test(string, function) - Defines a test.

QUnit uses a set of assertion method to provide semantic meaning in unit tests:[3]

  • assert.ok(boolean, string) - Asserts that the provided value casts to boolean true.
  • assert.equal(value1, value2, message) - Compares two values, using the double-equal operator.
  • assert.deepEqual(value1, value2, message) - Compares two values based on their content, not just their identity.
  • assert.strictEqual(value1, value2, message) - Strictly compares two values, using the triple-equal operator.

A basic example would be as follows:[4] 

QUnit.test('a basic test example', function (assert) {
  var obj = {};

  assert.ok(true, 'Boolean true');       // passes
  assert.ok(1, 'Number one');            // passes
  assert.ok(false, 'Boolean false');     // fails

  obj.start = 'Hello';
  obj.end = 'Ciao';
  assert.equal(obj.start, 'Hello', 'Opening greet'); // passes
  assert.equal(obj.end, 'Goodbye', 'Closing greet'); // fails
});

See also

References

  1. ^ "Release 2.26.0". 1 June 2026. Retrieved 1 June 2026.
  2. ^ Fard, Amin Milani; Mesbah, Ali (2017). JavaScript: The (Un)covered Parts (PDF). 10th IEEE International Conference on Software Testing, Verification and Validation (ICST 2017). Tokyo: IEEE.
  3. ^ "Assert methods". QUnit API Documentation. Retrieved 2018-02-14.
  4. ^ "Cookbook: Example test". QUnit API Documentation. Retrieved 2014-06-02.

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