QUnited runs headless QUnit tests
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Pronounced "queue united"

QUnited is a tool to run headless JavaScript tests with QUnit.

Tests are run with PhantomJS if available, otherwise Rhino (Java) is used. Give it a try and let me know if you have any feedback.


Install with RubyGems.

$ gem install qunited

If you are using Bundler you can add QUnited to your Gemfile. With Rails add QUnited to the test and development groups.

# In Gemfile

gem 'coffee-script' # Optional, only needed if using CoffeeScript
gem 'qunited'
# With Rails
group :test, :development do
  gem 'coffee-script' # Optional
  gem 'qunited'


Add the QUnited Rake task to your Rakefile. Specify your source and test JavaScript files.

require 'qunited/rake_task'

QUnited::RakeTask.new do |t|
  t.source_files = ['lib/js/jquery.js', 'lib/js/my_app_1.js', 'lib/js/my_app_2.js']
  t.test_files = 'test/js/**/*.js'

Source and test files can be configured either as an array of file names or a glob pattern string. Using an array is usually desirable for source files since the order of their execution is often important. Note that all JavaScript dependencies (jQuery, underscore, etc.) will have to be loaded with source files, in the correct order, to match your production environment.

You can also use an array to configure the test files but a glob pattern might be more convenient since test files usually do not need to be loaded in a particular order.

If you have some extra test helper libraries you would like to include (stubs, mocks) or files with other custom test setup, you can specify them as helper_files.

QUnited::RakeTask.new do |t|
  t.source_files = ['lib/js/jquery.js', 'lib/js/my_app_1.js', 'lib/js/my_app_2.js']
  t.helper_files = ['test/helpers/sinon-1.6.0.js']
  t.test_files = 'test/js/**/*.js'

These will be loaded after source files and before running tests. Separating helpers this way is merely for convenience and has the same effect as just including them last with your source files.


CoffeeScript is also supported. If any included source or test files have the .coffee extension they will automatically be compiled and tests will be run with the resulting JavaScript. Compilation is done with the coffee-script gem.

Specifying a driver

QUnited uses various drivers to set up the environment the tests run in (see below for more details). By default it tries to Just Work and find an available driver to use. You may want to lock down the driver (recommended) so your tests are consistent. To do this add a bit more configuration to the Rake task.

QUnited::RakeTask.new do |t|
  t.source_files = ['lib/js/jquery.js', 'lib/js/my_app']
  t.test_files = 'test/js/**/*.js'
  t.driver = :phantomjs # Always use PhantomJS to run tests. Fail if it's not available.

Available drivers are :phantomjs and :rhino. If no driver is specified QUnited will run tests with the best available driver, looking for them in that order.

Running tests

Once the Rake task is configured as described above, run tests like this:

$ rake qunited

You should get output similar to minitest or Test::Unit

$ rake qunited
qunited --driver phantomjs lib/js/jquery-1.4.2.js lib/js/helper.js test/js/app.js -- test/js/test_app.js

# Running JavaScript tests with PhantomJS:


Finished in 0.009 seconds, 1444.44 tests/s, 7777.78 assertions/s.

13 tests, 70 assertions, 0 failures, 0 errors, 0 skips

You can change the name of the task...

QUnited::RakeTask.new('test:js') do |t|
  # ...

and run accordingly.

$ rake test:js

Running tests in your browser

If you've used QUnit before you've probably run tests in a browser. This is a lot of fun and makes for super quick development.

Run this rake task to start a server that serves up all of your specified source and test JavaScript in the standard QUnit test runner.

$ rake qunited:server

Then visit http://localhost:3040 in your browser and there they are.

If you specified your own task name then just append ':server' to the end. So if your task name is test:js then run the server with the following.

$ rake test:js:server

If the default port of 3040 doesn't suit you then choose one you like.

QUnited::RakeTask.new('test:js') do |t|
  t.server_port = 8888
  # ...


A JavaScript interpreter with browser APIs is necessary to run tests. Various drivers are provided to interface with programs to set up this environment.


PhantomJS is a headless WebKit. It is fast and provides an accurate browser environment (since it is a browser).

Find out how to install it here or just brew install phantomjs if you have Homebrew.

This driver is considered available if the phantomjs executable is on your $PATH.

Rhino + Envjs

Rhino is a JavaScript interpreter that runs on the JVM. Envjs provides a simulated browser environment in Rhino. Rhino+Envjs should be considered a fallback since it is slower and has some minor incompatibility with most browsers. However, most tests will run fine.

Install Java 1.1 or greater to make this work.

This driver is considered available if you have Java 1.1 or greater and the java executable is on your $PATH.


QUnited builds on the following projects:

QUnit is a nice little JavaScript testing library and is, of course, central to what this project does.

PhantomJS is a headless WebKit with JavaScript API.

Rhino is a JavaScript interpreter that runs on the JVM.

Envjs is a simulated browser environment written in JavaScript.


QUnited is MIT licensed