Basic Karma config for testing JS in a Rails project using Jasmine

base_karma.conf.js

// Karma configuration

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

    // base path, that will be used to resolve files and exclude
    basePath: '',


    // frameworks to use
    frameworks: ['jasmine-jquery', 'jasmine'],


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

    // list of files / patterns to load in the browser
    files: [
      // {
      //   pattern: 'spec/javascripts/fixtures/**/*.html',
      //   watched: true,
      //   included: false,
      //   served: true
      // },
      'http://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.2/jquery.min.js',
      'http://cdnjs.cloudflare.com/ajax/libs/moment.js/2.7.0/moment.min.js',
      'https://cdnjs.cloudflare.com/ajax/libs/jquery-ujs/1.1.0/rails.min.js',
      // add more external libs here

      'lib/assets/javascripts/**/*.js',

      // add any other specific JS required files here
      'app/assets/javascripts/*.js',

      // add any other spec support files here
      'http://cdnjs.cloudflare.com/ajax/libs/sinon.js/1.7.3/sinon-min.js',
      'spec/javascripts/support/*.js',
      'spec/javascripts/**/*.spec.js',

      {
        pattern: 'spec/javascripts/fixtures/*',
        included: false,
        served: true
      }
    ],


    // test results reporter to use
    // possible values: 'dots', 'progress', 'junit', 'growl', 'coverage'
    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: false,


    // Start these browsers, currently available:
    // - Chrome
    // - ChromeCanary
    // - Firefox
    // - Opera (has to be installed with `npm install karma-opera-launcher`)
    // - Safari (only Mac; has to be installed with `npm install karma-safari-launcher`)
    // - PhantomJS
    // - IE (only Windows; has to be installed with `npm install karma-ie-launcher`)
    browsers: ['PhantomJS'],


    // If browser does not capture in given timeout [ms], kill it
    captureTimeout: 60000,


    // Continuous Integration mode
    // if true, it capture browsers, run tests and exit
    singleRun: true
  });
};