Install the karma-chai-plugins:
$ npm install karma-chai-plugins --save-devAdd chai and plugins you need to the frameworks key in your Karma configuration:
module.exports = (config) ->
config.set
# frameworks to use
frameworks: ['mocha', 'chai', 'chai-as-promised']
# ...- chai
- chai-as-promised
- chai-dom (do not use with chai-jquery)
- chai-jquery (jQuery should be included manually)
- sinon-chai (sinon will be included automatically)
- chai-things
Note: for using sinon, it is sufficient to add sinon-chai in karma frameworks. No need to add sinon.
Same as Chai.js: IE 9+, Chrome 7+, FireFox 4+, Safari 5+ except should style that is currently not compatible with IE 9.
Consider karma-expect, if you need run tests in IE8 and lower.
Currently, in order to use Chai-as-Promised when running tests within PhantomJS, a polyfill for Function.prototype.bind must be supplied. This plugin includes such a polyfill. If your code under test is intended to be run under PhantomJS in production, bear this in mind! You may need to supply your own polyfill in your project.
The Function.prototype.bind polyfill will be removed in the future v1.0 release of karma-chai-plugins.
chai-dom and chai-jquery can't work together, choose one of them.
karma-chai-plugins supports requirejs in tests, but for now it should be stated in frameworks before chai and other plugins:
module.exports = (config) ->
config.set
# frameworks to use
frameworks: ['mocha', 'requirejs', 'chai', 'chai-as-promised']
# ...In lieu of a formal styleguide, take care to maintain the existing coding style. Add unit tests for any new or changed functionality. Lint and test your code using npm test.