text: module.exports = function(config) {
  
    var appBase    = 'src/';       // transpiled app JS and map files
    var appSrcBase = appBase;      // app source TS files
  
    // Testing helpers (optional) are conventionally in a folder called `testing`
    var testingBase    = 'testing/'; // transpiled test JS and map files
    var testingSrcBase = 'testing/'; // test source TS files
  
    config.set({
      basePath: '',
      frameworks: ['jasmine'],
  
      plugins: [
        require('karma-jasmine'),
        require('karma-chrome-launcher'),
        require('karma-jasmine-html-reporter')
      ],
  
      client: {
        builtPaths: [appBase, testingBase], // add more spec base paths as needed
        clearContext: false // leave Jasmine Spec Runner output visible in browser
      },
  
      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',
  
        // zone.js
        'node_modules/zone.js/dist/zone.js',
        'node_modules/zone.js/dist/long-stack-trace-zone.js',
        'node_modules/zone.js/dist/proxy.js',
        'node_modules/zone.js/dist/sync-test.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 },
  
        // Paths loaded via module imports:
        // Angular itself
        { pattern: 'node_modules/@angular/**/*.js', included: false, watched: false },
        { pattern: 'node_modules/@angular/**/*.js.map', included: false, watched: false },
  
        { pattern: appBase + '/systemjs.config.js', included: false, watched: false },
        { pattern: appBase + '/systemjs.config.extras.js', included: false, watched: false },
        'karma-test-shim.js', // optionally extend SystemJS mapping e.g., with barrels
  
        // transpiled application & spec code paths loaded via module imports
        { pattern: appBase + '**/*.js', included: false, watched: true },
        { pattern: testingBase + '**/*.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 },
        { pattern: testingSrcBase + '**/*.ts', included: false, watched: false },
        { pattern: testingBase + '**/*.js.map', included: false, watched: false}
      ],
  
      // Proxied base paths for loading assets
      proxies: {
        // required for modules fetched by SystemJS
        '/base/src/node_modules/': '/base/node_modules/'
      },
  
      exclude: [],
      preprocessors: {},
      reporters: ['progress', 'kjhtml'],
  
      port: 9876,
      colors: true,
      logLevel: config.LOG_INFO,    
      autoWatch: true,
      browsers: ['Chrome'],
      singleRun: false
    })
  }
  