text: // Karma configuration
  
  module.exports = function (config) {
    var configuration = {
  
      // base path, that will be used to resolve files and exclude
      basePath: '',
  
      frameworks: [ 'mocha', 'chai' ],
  
      // list of files / patterns to load in the browser
      files: [
        'Countable.js',
        'test/*.js'
      ],
  
      // test results reporter to use
      // possible values: 'dots', 'progress', 'junit'
      reporters: [ 'dots' ],
  
      // web server port
      port: 9876,
  
      // enable / disable colors in the output (reporters and logs)
      colors: true,
  
      // level of logging
      // possible values: LOG_DISABLE || LOG_ERROR || LOG_WARN || LOG_INFO || LOG_DEBUG
      logLevel: config.LOG_INFO,
  
      // enable / disable watching file and executing tests whenever any file changes
      autoWatch: true,
  
      // Start these browsers, currently available:
      // - Chrome
      // - ChromeCanary
      // - Firefox
      // - Opera
      // - Safari (only Mac)
      // - PhantomJS
      // - IE (only Windows)
      browsers: [ 'Firefox', 'Chrome' ],
  
      customLaunchers: {
        Chrome_travis_ci: {
          base: 'Chrome',
          flags: ['--no-sandbox']
        }
      },
  
      // If browser does not capture in Given timeout [ms], kill it
      captureTimeout: 20000,
  
      // Continuous Integration mode
      // if true, it capture browsers, run tests and exit
      singleRun: true,
  
      // report which specs are slower than 500ms
      // CLI --report-slower-than 500
      reportSlowerThan: 500
    }
  
    if (process.env.TRAVIS) {
      configuration.browsers = [ 'Chrome_travis_ci' ]
    }
  
    config.set(configuration)
  }