Chai is a BDD / TDD assertion library for node and the browser that can be delightfully paired with any javascript testing framework.

For more information view the documentation.

Installation

Chai is available for both node.js and the browser using any test framework you like.

Node.js

Package is available through npm:

npm install chai

Recommend adding it to package.json devDependancies.

Browser

Include the chai browser build in your testing suite.

<script src="chai.js" type="text/javascript"></script>

Currently supports all modern browsers: IE 9+, Chrome 7+, FireFox 4+, Safari 5+. Want to know if your browser is compatible? Run the online test suite.

Plugins

The Chai community is growing! Plugins allow developers to expand Chai's available assertions. Here is what the community has come up with so far:

• chai-spies is a basic spy implementation for chai. It's also a good resource for building chai plugins that work in both node.js and the browser.
• chai-jquery by @jfirebaugh provides deep jQuery integration with chai's should and expect.
• jack by @vesln is a mock/stub library that can be used as a stand-alone or with chai.
• sinon-chai by @domenic extends chai with assertions for the Sinon.js mocking framework.

Contributors

 commits: 185
 files  : 71
 authors: 
   163  Jake Luer               88.1%
    16  Veselin Todorov         8.6%
     3  Jeff Barczewski         1.6%
     1  Domenic Denicola        0.5%
     1  John Firebaugh          0.5%
     1  Vinay Pulim             0.5%

License

(The MIT License)

Copyright (c) 2011-2012 Jake Luer jake@alogicalparadox.com

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.