Karma

A simple tool that allows you to execute JavaScript code in multiple real browsers, powered by Node.js and Socket.io.

The main purpose of Karma is to make your TDD development easy, fast, and fun.

When should I use Karma?

You want to test code in real browsers.
You want to test code in multiple browsers (desktop, mobile, tablets, etc.).
You want to execute your tests locally during development.
You want to execute your tests on a continuous integration server.
You want to execute your tests on every save.
You love your terminal.
You don't want your (testing) life to suck.
You want to use Istanbul to automagically generate coverage reports.
You want to use RequireJS for your source files.

But I still want to use _insert testing library_

Karma is not a testing framework, neither an assertion library, so for that you can use pretty much anything you like. Right now out of the box there is support for

Mocha
Jasmine
QUnit
_anything else_ Write your own adapter. It's not that hard. And we are here to help.

Which Browsers can I use?

All the major browsers are supported, if you want to know more see the Browsers page.

Troubleshooting

My tests are running really slow

If you're testing in the browser, make sure the Karma tab is the active tab. If you're using LiveReload to develop, try opening a second browser window so Karma can always be active.
Make sure you're not watching too many files. Set your logLevel to config.LOG_DEBUG to see how many files are being watched.

I want to use it. Where do I sign?

You don't need to sign anything but here are some resources to help you to get started. And if you need even more infos have a look at our great website.

Obligatory Screencast.

Every serious project has a screencast, so here is ours. Just click here and let the show begin.

NPM Installation.

If you have Node.js installed, it's as simple as

$ npm install -g karma

This will give you the latest stable version available on npm. If you want to live life on the edge you can do so by

$ npm install -g karma@canary

The curious can have a look at the documentation articles for [Getting Started] and Versioning.

Using it.

Go into your project and create a Karma configuration. That is just a simple JavaScript or CoffeeScript file that tells Karma where all the awesomeness of your project are.

You can find a simple example in test/client/karma.conf.js which contains most of the options.

To create your own from scratch there is the init command, which will be named karma.conf.js by default:

$ karma init

This will ask you many questions and if you answered them all correct you will be allowed to use Karma.

For more information on the configuration options see Configuration File Overview.

Now that you have your configuration all that is left to do is to start Karma:

$ karma start

If you want to run tests manually (without auto watching file changes), you can:

$ karma run

But only if you have started the Karma server before.

Why did you create this?

Throughout the development of AngularJS, we've been using JSTD for testing. I really think that JSTD is a great idea. Unfortunately, we had many problems with JSTD, so we decided to write our own test runner based on the same idea. We wanted a simple tool just for executing JavaScript tests that is both stable and fast. That's why we use the awesome Socket.io library and Node.js.

I still don't get it. Where can I get help?

This is so great. I want to help.

See Contributing.md or the docs for more information.

My boss wants a license. So where is it?

The MIT License

Copyright (C) 2011-2013 Vojta Jína.

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

igorlima / karma