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module.exports = function(config) {  config.set({      frameworks: [ 'mocha' ]    , files: [          'chai.js'        , 'test/bootstrap/index.js'        , 'test/*.js'      ]    , reporters: [ 'progress' ]    , colors: true    , logLevel: config.LOG_INFO    , autoWatch: false    , browsers: [ 'HeadlessChrome' ]    , customLaunchers: {      HeadlessChrome: {      base: 'ChromeHeadless'    , flags: [ '--no-sandbox',]    , }    , }    , browserDisconnectTimeout: 10000    , browserDisconnectTolerance: 2    , browserNoActivityTimeout: 20000    , singleRun: true  });
  switch (process.env.CHAI_TEST_ENV) {    case 'sauce':      require('./karma.sauce')(config);      break;    default:      // ...      break;  };};