Sinon and Chai for Karma

npm install karma-sinon-chai
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for Karma


This Karma plugin requires Karma >=0.10


Install the module via npm

$ npm install --save-dev karma-sinon-chai

Add sinon-chai to the frameworks key in your Karma configuration:

module.exports = function(config) {
  'use strict';
    frameworks: ['mocha', 'sinon-chai'],


Each of the different Chai assertion suites is available in the tests:

describe 'karma tests with chai', ->

  it 'should expose the Chai assert method', ->
    assert.ok('everything', 'everything is ok');

  it 'should expose the Chai expect method', ->
    expect('foo').to.not.equal 'bar'

  it 'should expose the Chai should property', ->
    1.should.not.equal 2
    should.exist 123

Sinon and Chai matchers for Sinon are also available:

describe 'karma tests with sinon', ->

  it 'can spy on objects', ->
    foo = bar: ->
    sinon.spy foo, 'bar'

    foo.bar 'baz'

    foo.bar.should.have.been.calledWith 'baz'

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