karma.conf.js

// Karma configuration
// Generated on Fri Dec 05 2014 16:49:29 GMT-0500 (EST)

module.exports = function(config) {
  const browsers = config.browsers;
  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: ['jspm', 'jasmine'],

    jspm: {
      // Edit this to your needs
      loadFiles: ['test/**/*.spec.js'],
      serveFiles : [
        'src/**/*.js',
        'test/setup.js'
      ]
    },


    // list of files / patterns to load in the browser
    files: [],


    // list of files to exclude
    exclude: [
    ],


    // preprocess matching files before serving them to the browser
    // available preprocessors: https://npmjs.org/browse/keyword/karma-preprocessor
    preprocessors: {
      'test/**/*.js': ['babel'],
      'src/**/*.js': ['babel']
    },
    'babelPreprocessor': {
      options: {
        sourceMap: 'inline',
        presets: [ 'es2015-loose', 'stage-1'],
        plugins: [
          'syntax-flow',
          'transform-decorators-legacy',
          'transform-flow-strip-types'
        ]
      }
    },

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


    // web server port
    port: 9876,


    // 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: browsers && browsers.length > 0 ? browsers : ['ChromeHeadlessOpt'],
    customLaunchers: {
      ChromeDebugging: {
        base: "Chrome",
        flags: [...commonChromeFlags, "--remote-debugging-port=9333"],
        debug: true
      },
      ChromeHeadlessOpt: {
        base: 'ChromeHeadless',
        flags: [
          ...commonChromeFlags
        ]
      }
    },

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

    mochaReporter: {
      ignoreSkipped: true
    },
  });
};

const commonChromeFlags = [
  '--no-default-browser-check',
  '--no-first-run',
  '--no-managed-user-acknowledgment-check',
  '--no-pings',
  '--no-sandbox',
  '--no-wifi',
  '--no-zygote',
  '--disable-background-networking',
  '--disable-background-timer-throttling',
  '--disable-backing-store-limit',
  '--disable-boot-animation',
  '--disable-breakpad',
  '--disable-cache',
  '--disable-clear-browsing-data-counters',
  '--disable-cloud-import',
  '--disable-component-extensions-with-background-pages',
  '--disable-contextual-search',
  '--disable-default-apps',
  '--disable-extensions',
  '--disable-infobars',
  '--disable-translate',
  '--disable-sync'
];