Karma, PhantomJs, Jasmine setup using npm

index.js

/**
 * I couldn't find a super simple example of how to run Karma, PhantomJs, with
 * Jasmine tests via npm, so eventually I decided to create my own. Maybe
 * someone will find it useful.
 *
 *
 * Installation (using npm):
 *
 *  npm install -g karma-cli
 *  npm install -g karma --save-dev
 *  npm install -g phantomjs
 *  npm install -g karma-jasmine --save-dev
 *  npm install -g karma-phantomjs-launcher --save-dev
 *
 *
 * file structure:
 *
 * index.js                 // This file
 * test/
 *      karma.conf.js       // This is auto generated
 *      test.js
 *
 *
 * Once everything is installed, you run:
 *
 *  karma init test/karma.conf.js
 *
 * And to run the actual tests:
 *
 *  karma start test/karma.conf.js
 *
 *
 * Below is just an object with some functions that are easy to test.
 *
 */
var dummy = {
    aboveFive: function (n) {
        return n > 5;
    },

    setClass: function (el, classname) {
        el.className = classname;
    }
};

karma.conf.js

/**
 * 
 * This file is auto generated when you run
 *    karma init test/karma.conf.js
 * 
 * I only included it here for you to see.
 * 
 */

// Karma configuration

module.exports = function(config) {
  config.set({

    // base path that will be used to resolve all patterns (eg. files, exclude)
    basePath: '..',


    // frameworks to use
    // available frameworks: https://npmjs.org/browse/keyword/karma-adapter
    frameworks: ['jasmine'],


    // list of files / patterns to load in the browser
    files: [
      'index.js',
      'test/test.js'
    ],


    // list of files to exclude
    exclude: [
    ],


    // preprocess matching files before serving them to the browser
    // available preprocessors: https://npmjs.org/browse/keyword/karma-preprocessor
    preprocessors: {
    },


    // test results reporter to use
    // possible values: 'dots', 'progress'
    // available reporters: https://npmjs.org/browse/keyword/karma-reporter
    reporters: ['progress'],


    // web server port
    port: 9876,


    // enable / disable colors in the output (reporters and logs)
    colors: true,


    // level of logging
    // possible values: config.LOG_DISABLE || config.LOG_ERROR || config.LOG_WARN || config.LOG_INFO || config.LOG_DEBUG
    logLevel: config.LOG_INFO,


    // enable / disable watching file and executing tests whenever any file changes
    autoWatch: true,


    // start these browsers
    // available browser launchers: https://npmjs.org/browse/keyword/karma-launcher
    browsers: ['PhantomJS'],


    // Continuous Integration mode
    // if true, Karma captures browsers, runs the tests and exits
    singleRun: false
  });
};

test.js

/* globals describe, it, expect, dummy */
describe('Checking that everything is hooked up nicely', function () {
    it('Simple function', function () {
        expect(dummy.aboveFive(2)).toEqual(false);
    });

    it('involving the dom', function () {
        var el = document.createElement('span');

        dummy.setClass(el, 'foo');

        expect(el.className).toBe('foo');
    });
});

Thank you

Note: Since karma-jasmine 0.3.0 the jasmine library is no longer bundled with karma-jasmine and you have to install it on your own. You can simply do it by:

$ npm install jasmine-core --save-dev

How to use webpage within tests? I currently get errors

var webPage = require("webpage");
var page = webPage.create();
PhantomJS 2.1.1 (Windows 8 0.0.0) ERROR
  {
    "message": "Error: Cannot find module \"webpage\