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gruntjs / grunt-contrib-qunit

Run QUnit tests in Headless Chrome.
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grunt-contrib-qunit v10.1.1 Build Status

Run QUnit unit tests in a headless Chrome instance

Getting Started

If you haven't used Grunt before, be sure to check out the Getting Started guide, as it explains how to create a Gruntfile as well as install and use Grunt plugins. Once you're familiar with that process, you may install this plugin with this command:

npm install grunt-contrib-qunit --save-dev

Once the plugin has been installed, it may be enabled inside your Gruntfile with this line of JavaScript:

grunt.loadNpmTasks('grunt-contrib-qunit');

Qunit task

Run this task with the grunt qunit command.

You have chosen to write your unit tests using QUnit, you have written a html page which reports the summary and individual details of your unit tests, you are happy with this but realize you miss the ability to have your unit test suite run automatically each time you commit changes to your code.

This is where the grunt-contrib-qunit plugin comes in the play: grunt-contrib-qunit lets you run your tests in a Headless Chrome browser, thus converting your unit test suite into something you can run from the command-line, and from any automated continuous integration service, which in turn can alert you of any failing tests.

You can debug your unit tests suite browsing your HTML test page in your browser.

This plugin defines one single task: qunit. Configure it in your Gruntfile.js, run it with the grunt qunit command.

Please read about specifying task targets, files and options in the grunt Configuring tasks guide.

When installed by npm, this plugin will automatically download and install a local Chrome binary within the node_modules directory of the Puppeteer library, which is used for launching a Chrome process. If your system already provides an installation of Chrome, you can configure this plugin to use the globally installed executable by specifying a custom executablePath in the puppeteer launch options.
This will almost certainly be needed in order to run Chrome in a CI environment

QUnit version

The current version of grunt-contrib-qunit supports QUnit 2.17.0 and later.

grunt-contrib-qunit QUnit
grunt-contrib-qunit 10 and later QUnit 2.17 and later
grunt-contrib-qunit 9 QUnit 2.2.0 and later
grunt-contrib-qunit 5 QUnit 1.x

System dependencies

This plugin uses Puppeteer to run tests in a Chrome process. Chrome requires a number of dependencies that must be installed, depending on your OS. Please see Puppeteer's docs to see the latest docs for what dependencies you need for your OS:

https://github.com/puppeteer/puppeteer/blob/main/docs/troubleshooting.md

Options

timeout

Type: Number
Default: 5000

The amount of time (in milliseconds) that grunt will wait for a QUnit start() call before failing the task with an error.

inject

Type: String|Array
Default: chrome/bridge.js

One or multiple (array) JavaScript file names to inject into the html test page. Defaults to the path of the QUnit-Chrome bridge file.

You may want to inject something different than the provided QUnit-Chrome bridge, or to inject more than just the provided bridge. See the built-in bridge for more information.

httpBase

Type: String
Default: ""

Create URLs for the src files, all src files are prefixed with that base.

console

Type: boolean
Default: true

By default, console.[log|warn|error] output from the Chrome browser will be piped into QUnit console. Set to false to disable this behavior.

urls

Type: Array
Default: []

Absolute http:// or https:// urls to be passed to Chrome. Specified URLs will be merged with any specified src files first. Note that urls must be served by a web server, and since this task doesn't contain a web server, one will need to be configured separately. The grunt-contrib-connect plugin provides a basic web server.

force

Type: boolean
Default: false

When true, the whole task will not fail when there are individual test failures, or when no assertions for a test have run. This can be set to true when you always want other tasks in the queue to be executed.

summaryOnly

Type: boolean
Default: false

When true, this will suppress the default logging for individually failed tests. Customized logging can be performed by listening to qunit.on.testEnd events.

puppeteer

Type: Object
Default: { headless: true, args: [] }

Options passed to puppeteer.launch(). This can used to specify a custom Chrome executable path, run in non-headless mode, specify environment variables for the Chrome process, etc. See the Puppeteer API Reference for a list of launch options.

The default value for args is set from the CHROMIUM_FLAGS environment variable, which in turn defaults to --no-sandbox if the CI environment variable is set.

noGlobals

Type: boolean
Default: false

Fail a test when the global namespace is polluted. See the QUnit.config.noglobals for more information.

Command line options

Filtering by module name: --modules

grunt qunit --modules="foo"

Will run the module foo. You can specify one or multiple, comma-separated modules to run.

Running tests in seeded-random order: --seed

grunt qunit --seed="a-string"

Specify the seed to pass to QUnit, to run tests in random, but deterministic order. See QUnit.config.seed docs for more information.

Usage examples

Wildcards

In this example, grunt qunit:all will test all .html files in the test directory and all subdirectories. First, the wildcard is expanded to match each individual file. Then, each matched filename is passed to Chrome (one at a time).

// Project configuration.
grunt.initConfig({
  qunit: {
    all: ['test/**/*.html']
  }
});

Testing via http:// or https://

In circumstances where running unit tests from local files is inadequate, you can specify http:// or https:// URLs via the urls option. Each URL is passed to Chrome (one at a time).

In this example, grunt qunit will test two files, served from the server running at localhost:8000.

// Project configuration.
grunt.initConfig({
  qunit: {
    all: {
      options: {
        urls: [
          'http://localhost:8000/test/foo.html',
          'http://localhost:8000/test/bar.html'
        ]
      }
    }
  }
});

Wildcards and URLs may be combined by specifying both.

Using the grunt-contrib-connect plugin

It's important to note that Grunt does not automatically start a local web server. That being said, the grunt-contrib-connect plugin connect task can be run before the qunit task to serve files via a simple connect web server.

In the following example, if a web server isn't running at localhost:8000, running grunt qunit with the following configuration will fail because the qunit task won't be able to load the specified URLs. However, running grunt connect qunit will first start a static connect web server at localhost:8000 with its base path set to the Gruntfile's directory. Then, the qunit task will be run, requesting the specified URLs.

// Project configuration.
grunt.initConfig({
  qunit: {
    all: {
      options: {
        urls: [
          'http://localhost:8000/test/foo.html',
          'http://localhost:8000/test/bar.html',
        ]
      }
    }
  },
  connect: {
    server: {
      options: {
        port: 8000,
        base: '.'
      }
    }
  }
});

// This plugin provides the "connect" task.
grunt.loadNpmTasks('grunt-contrib-connect');

// A convenient task alias.
grunt.registerTask('test', ['connect', 'qunit']);

Custom timeouts and Puppeteer options

In the following example, the default timeout value of 5000 is overridden with the value 10000 (timeout values are in milliseconds). Custom options to use when launching Puppeteer can be specified using options.puppeteer, with all property names corresponding directly to options supported by puppeteer.launch(). For example, the following configuration sets the TZ environment variable and invokes a custom Chrome executable at "/usr/bin/chromium"

// Project configuration.
grunt.initConfig({
  qunit: {
    options: {
      timeout: 10000,
      puppeteer: {
        env: {
          TZ: "UTC"
        },
        executablePath: "/usr/bin/chromium"
      }
    },
    all: ['test/**/*.html']
  }
});

Events and reporting

QUnit events are forwarded to Grunt's event system, enabling you to build custom reporting tools. Please refer to the QUnit API documentation on QUnit events and QUnit callbacks for when and what data is exposed from these events.

In addition to forwarding QUnit's events, the following events are also emitted by the Grunt plugin:

You may listen for these events like so:

grunt.event.on('qunit.spawn', function (url) {
  grunt.log.ok('Running test: ' + url);
});
grunt.event.on('qunit.on.testEnd', function (test) {
  var name = test.fullName.join(' > ');
  if (test.status === 'failed') {
    grunt.log.error(name);
  } else {
    grunt.log.ok(name + ' # ' + test.status);
  }
});

Release History

Task submitted by "Cowboy" Ben Alman

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