text: module.exports = function(config) {
  
    var appBase   = 'dist/app/';      // transpiled app JS files
    var appAssets ='/base/app/'; // component assets fetched by Angular's compiler
  
    config.set({
      basePath: '',
      frameworks: ['jasmine'],
      plugins: [
        require('karma-jasmine'),
        require('karma-chrome-launcher'),
        require('karma-htmlfile-reporter')
      ],
  
      customLaunchers: {
        // From the CLI. Not used here but interesting
        // chrome setup for travis CI using chromium
        Chrome_travis_ci: {
          base: 'Chrome',
          flags: ['--no-sandbox']
        }
      },
      files: [
        // System.js for module loading
        'node_modules/systemjs/dist/system.src.js',
  
        // Polyfills
        'node_modules/core-js/client/shim.js',
  
        // Reflect and Zone.js
        'node_modules/reflect-metadata/Reflect.js',
        'node_modules/zone.js/dist/zone.js',
        'node_modules/zone.js/dist/jasmine-patch.js',
        'node_modules/zone.js/dist/async-test.js',
        'node_modules/zone.js/dist/fake-async-test.js',
  
        // RxJs.
        { pattern: 'node_modules/rxjs/**/*.js', included: false, watched: false },
        { pattern: 'node_modules/rxjs/**/*.js.map', included: false, watched: false },
  
        // Angular 2 itself and the testing library
        {pattern: 'node_modules/@angular/**/*.js', included: false, watched: false},
        {pattern: 'node_modules/@angular/**/*.js.map', included: false, watched: false},
  
        {pattern: 'systemjs.config.js', included: false, watched: false},
        'karma-test-shim.js',
  
        // transpiled application & spec code paths loaded via module imports
        {pattern: appBase + '**/*.js', included: false, watched: true},
  
        // asset (HTML & CSS) paths loaded via Angular's component compiler
        // (these paths need to be rewritten, see proxies section)
        {pattern: appBase + '**/*.html', included: false, watched: true},
        {pattern: appBase + '**/*.css', included: false, watched: true},
  
        // paths for debugging with source maps in dev tools
        {pattern: appBase + '**/*.ts', included: false, watched: false},
        {pattern: appBase + '**/*.js.map', included: false, watched: false}
      ],
  
      // proxied base paths for loading assets
      proxies: {
        // required for component assets fetched by Angular's compiler
        "/app/": appAssets
      },
  
      exclude: [],
      preprocessors: {},
      reporters: ['progress', 'html'],
  
      // HtmlReporter configuration
      htmlReporter: {
        // Open this file to see results in browser
        outputFile: '_test-output/tests.html',
  
        // Optional
        pageTitle: 'Unit Tests',
        subPageTitle: __dirname
      },
  
      port: 9876,
      colors: true,
      logLevel: config.LOG_INFO,
      autoWatch: true,
      browsers: ['Chrome'],
      singleRun: false
    })
  }
  