Intern. Software testing for humans.

Write tests in JavaScript using any style you like (TDD, BDD, whatever!).
Run tests straight from your browser, right in Node.js, or against many browsers & platforms at the same time with the Intern test runner.
Get full code coverage reporting so you know what’s left to test.
Seamlessly run tests on Sauce Labs, BrowserStack, TestingBot, or your own Selenium Grid.
Ready for continuous integration? Intern fully integrates with Travis CI, Jenkins, and TeamCity out of the box.

Trusted by

Alfresco, Esri, HSBC, IBM, Intuit, Mozilla, and more

Get Intern from GitHub or just run npm install intern now

Does it work with <library>?

You bet! No matter what library or framework your application uses, client–side and server–side, you can test it with Intern! Check out our example projects to see how simple it is to get Intern up and running with many popular JavaScript libraries:

What can Intern do that others can’t?

Intern	QUnit	Mocha	Jasmine	BusterJS	Karma	Nightwatch.js
Includes unit testing
Yes	Yes	Yes	Yes	Yes	No	No
Includes functional testing
Yes	No	No	No	No	No	Yes
Includes code coverage analysis
Yes	No	Yes	No	Extension	Yes	No
Runs tests in parallel for improved performance
Yes	No	No	No	No	Yes	Yes
Uses true¹ browser events
Yes	No	No	No	No	No	Yes
Supports AMD natively
Yes	No	No	No	Extension	Extension	No
Runs stand-alone² in browsers
Yes	Yes	Build required	Build required	Experimental	No	No
Tests Node.js code
Yes	No³	Yes	Yes	Yes	Yes	No
Supports multi-level source maps
Yes	No	No	No	No	No	No
Can be used with any⁴ assertion library
Yes	No	Yes	No	Yes	N/A	No
Includes multiple test interfaces
TDD, BDD, object	TDD	TDD, BDD, object	BDD	TDD, BDD	N/A	Object
Lets you write your own custom test interfaces
Yes	No	Yes	No	Yes	N/A	Commands only
Lets you write your own custom reporters
Yes	No	Yes	No	Yes	Yes	No
Uses Promises for asynchronous testing
Yes	Globals	Yes	Polling	Yes	Callbacks	Callbacks
Uses standard W3C browser testing APIs (WebDriver)
Yes	No	No	No	No	No	Incomplete
Automatically fixes bugs in Selenium servers
Yes	No	No	No	No	No	No
Tests native mobile apps
Yes	No	No	No	No	No	Yes
Includes built-in support for Travis CI, Jenkins, and TeamCity
Yes	No	No	No	Yes	Yes	Partial
Includes built-in Sauce Labs integration
Yes	No	No	No	No	No	No
Includes built-in BrowserStack integration
Yes	No	No	No	No	No	No
Includes built-in TestingBot integration
Yes	No	No	No	No	No	No
Comes with Grunt tasks
Yes	3rd party
Gets your coffee and makes photocopies
Yes	No	No	No	No	No	No

1: True events are not generated by JavaScript within the sandbox, so are able to accurately emulate how a user actually interacts with the application. Synthetic events generated by other test frameworks are limited by browser security restrictions.

2: Stand-alone means that unit tests can be executed in a browser by navigating to a URL without needing any special HTTP server or proxy for support.

3: Some older versions of QUnit can be used in conjunction with a 3rd party module to run on Node.js, but newer versions do not support Node.js and will break even with the use of 3rd party modules.

4: If it throws an error on failure, it works with Intern.

OK, how about documentation?

Intern’s comprehensive documentation will walk you through everything you need to know. Detailed tutorials, examples, API information and more await you in the user guide. Or, if you prefer lectures, you can watch our introductory talk from jQcon Chicago 2014.

Go to the user guide or watch our jQcon Chicago 2014 talk

Need some help?

Don’t stress if you get stuck and need a little assistance. Free, community-provided Intern support is always available. SitePen also offers workshops and commercial support for Intern if you need a little extra TLC.

Stack Overflow or IRC for help using Intern
GitHub Issues for bugs and feature requests

Visit Intern on GitHub