Mocha + RequireJS = AMD testing

I have a hard time connecting Mocha to RequireJS based application, may be You'll be able to come up with something :). After many hours when I've been trying to load AMD modules and simply console.log some 'fired' info that the module has been loaded... nothing happend had happened - the program just ended and printed out some mocha info.

var facade = requirejs(['../../public/js/scripts/widgets/widgets/article/main.js'],      
    function(mod) {
// run with: $ mocha -u tdd test.js --reporter spec

and than I've come up with the idea to fire just this to test callbacks:

setTimeout((function() {
}), 5000);
// run with: $ mocha -u tdd test.js --reporter spec

also didn't work. So finally I've run both with

$ node test.js 

and finally it worked. So question is than: How to run Mocha test with callbacks handling, as those are essential for AMD testing?


The way you are doing it, mocha is not going to do anything with your file because it does not see a test suite in it. RequireJS is scheduled to call the callback but mocha exits before this has a chance to happen. Same with your timeout example.

The following gives you an example.

File test.js:

'use strict';
var requirejs = require("requirejs");
    baseUrl: '.',
    nodeRequire: require

suite('Something', function(){
    var foo;

    setup(function (done){
        // This saves the module foo for use in tests. You have to use
        // the done callback because this is asynchronous.
                  function(mod) {
            foo = mod;

  suite('blah', function(){
    test('blah', function(){
      if (foo.test !==  "test")
          throw new Error("failed!");

File foo.js:

define(function () {
   return {test: "test"};

When you run:

mocha -u tdd test.js

You'll see that the callback is fired and the test passes.

I have configured related boilerplate for using mocha in environment of RequireJS. It may be not exact what you want, but it may be helpful.

One more note - assuming that your script placed in "/public" it makes sense to test it in browser environment instead nodejs. For this purposes you should to look at some test-runner like JsTestDriver ( or karma-runner ( Or another...

In snipped provided in karma documentation (

var tests = [];
for (var file in window.__karma__.files) {
  if (window.__karma__.files.hasOwnProperty(file)) {
    if (/Spec\.js$/.test(file)) {

    // Karma serves files from '/base'
    baseUrl: '/base/src',

    paths: {
        'jquery': '../lib/jquery',
        'underscore': '../lib/underscore',

    shim: {
        'underscore': {
            exports: '_'

    // ask Require.js to load these files (all our tests)
    deps: tests,

    // start test run, once Require.js is done
    callback: window.__karma__.start

introduced way when we force requirejs to preload all necessary spec-files using

  deps: ['array', 'of', 'our', 'spec', 'files']

In this environment each spec-file should be a regular RequireJS module.

Example of test spec for such environment:

define(['chai'], function(chai) {
  var expect = chai.expect;

  describe('bootstrap', function() {
    it('should...', function() {

Need Your Help

Mac app is still running after deleting Info.plist

osx bundle info.plist

I want to build a Mac App from scratch. I manually created the required folders of main app, Contents, MacOS, Resources, and dropped the binaries. The only one I don't know how to create from scrat...

How to swipe WebViews in Xamarin Android

android webview xamarin

I am new to Xamarin Android. I am trying to implement a program which swipes several WebViews by sliding the fingers through a ribbon at the bottom of the WebView. So far, I have written the follow...

About UNIX Resources Network

Original, collect and organize Developers related documents, information and materials, contains jQuery, Html, CSS, MySQL, .NET, ASP.NET, SQL, objective-c, iPhone, Ruby on Rails, C, SQL Server, Ruby, Arrays, Regex, ASP.NET MVC, WPF, XML, Ajax, DataBase, and so on.