You need to include some adapter that implements __karma__.start method!

[xcsweb]

Expected behaviour

Actual behaviour

Environment Details

• "karma": "^3.1.1"
  // Karma configuration
  // Generated on Fri Nov 16 2018 16:57:51 GMT+0800 (GMT+08:00)
  module.exports = function(config) {
  config.set({

  // base path that will be used to resolve all patterns (eg. files, exclude)
  basePath: '',

  // frameworks to use
  // available frameworks: https://npmjs.org/browse/keyword/karma-adapter
  frameworks: ['jasmine','chai'],

  // list of files / patterns to load in the browser
  files: [
  'test//*.spec.js'
  ],
  preprocessors: {
  'test//*.spec.js': ['babel']
  },
  // list of files / patterns to exclude
  exclude: [
  ],

  // test results reporter to use
  // possible values: 'dots', 'progress'
  // available reporters: https://npmjs.org/browse/keyword/karma-reporter
  reporters: ['progress'],

  // web server port
  port: 8085,

  // 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: true,

  // start these browsers
  // available browser launchers: https://npmjs.org/browse/keyword/karma-launcher
  browsers: ['Chrome'],

  // Continuous Integration mode
  // if true, Karma captures browsers, runs the tests and exits
  singleRun: false,

  // Concurrency level
  // how many browser should be started simultaneous
  concurrency: Infinity
  })
  }

Steps to reproduce the behaviour

how can solve this problem

[rogeriopvl]

Duplicate of #3198

[johnjbarton]

Set logLevel: config.LOG_INFO. Do not use --singleRun. When the server is up, open the browser and use devtools to debug. Your html page is missing the karma-jasmine adapter or it is mangled or not loading.