Mocha (JavaScript framework)

Mocha

Initial release	22 November 2011
Stable release	2.3.4 / 15 November 2015
Written in	JavaScript
Type	Test automation framework
License	MIT
Website	mochajs.org

Mocha is a JavaScript test framework running on node.js, featuring browser support, asynchronous testing, test coverage reports, and use of any assertion library.

Assertion Libraries

Mocha can be used with most JavaScript assertion libraries, including:

• should.js
• express.js
• chai
• better-assert
• unexpected

Usage and examples

$ npm install -g mocha
$ mkdir test

var assert = require("assert")
describe('Foo', function(){
  describe('#getBar(value)', function(){
    it('should return 100 when value is negative') // placeholder
    it('should return 0 when value is positive', function(){
      assert.equal(0, Foo.getBar(10));
    })
  })
})

$ mocha
.
1 test complete (1ms)

For asynchronous testing, invoke the callback, and Mocha will wait for completion.

describe('Foo', function(){
  describe('#bar()', function(){
    it('should work without error', function(done){
      var foo = new Foo(128);
      foo.bar(done);
    })
  })
})

See also

• List of unit testing frameworks
• Jasmine
• Unit.js
• QUnit
• npm

References

External links

• GitHub repository
• Guide to mocha