Installation

Chai is available for both Node.js and the browser using any test framework you like. There are also a number of other tools that include Chai.

Node.js ¶

The package is available through npm:

npm install chai

It’s recommended to add it to your package.json devDependencies using a * as the version tag. This will ensure that you always have the most recent version after running npm install, which can be especially powerful when paired with a continuous integration tool.

"devDependencies": {
  "chai": "*",
  "mocha": "*"
},
"//": "mocha is our preference, but you can use any test runner you like"

Browser ¶

Include the Chai browser build in your testing suite:

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

This will provide chai as a global object, or define it if you are using AMD.

The latest tagged version will be available for hot-linking at http://chaijs.com/chai.js. If you prefer to host yourself, use the chai.js file from the root of the github project. We recommend that you always use a version tag as your starting point, so the tag download list is the best place to start.

Currently supports all modern browsers: IE 9+, Chrome 7+, FireFox 4+, Safari 5+. Please note that the should style is currently not compatible with IE9.

If you want to know if your browser is compatible, run the online test suite.

Other Platforms ¶

Ruby ¶

Konacha

For testing your Ruby on Rails application using Chai assertions and the Mocha test framework, check out Konacha – a modern test harness that takes full advantage of Rails 3 features such as the asset pipeline and engines.