Mocha (JavaScript framework)

Last updated
Mocha
Developer(s) OpenJS Foundation
Initial releaseNovember 22, 2011 (2011-11-22)
Stable release
11.2.0 [1]   OOjs UI icon edit-ltr-progressive.svg / 17 March 2025;14 days ago (17 March 2025)
Repository github.com/mochajs/mocha
Written in JavaScript
Platform Node.js
Type Test automation framework
License MIT
Website mochajs.org

Mocha is a JavaScript test framework for Node.js programs, featuring browser support, asynchronous testing, test coverage reports, and use of any assertion library. [2]

Contents

Assertion libraries

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

Usage and examples

$ npminstall-gmocha $ mkdirtest$ $EDITORtest/test.js# or open with your favorite editor
varassert=require("assert")describe('Foo',function(){describe('#getBar(value)',function(){it('should return 100 when value is negative')// placeholderit('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){varfoo=newFoo(128);foo.bar(done);})})})

See also

References

  1. ↑ "Release 11.2.0". 17 March 2025. Retrieved 27 March 2025.
  2. ↑ "Mocha - the fun, simple, flexible JavaScript test framework". mochajs.org.
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