karma-sauce-launcher断开每次测试运行，导致IE和Safari运行失败

通过涉及的每个组件的多个版本（karma，socket.io，sauce-connect），我几个月来一直有这个问题 . 目前我正在使用Karma 12.16 .

基本上，当使用https://github.com/karma-runner/karma-sauce-launcher时，Safari和IE浏览器启动会断开每一次测试运行，导致只进行部分测试运行 . 相关的Karma日志是

Driving the web on session: abf7c976abf1420a9c72b3e06c655040    
DEBUG [wd]:  > RESPONSE init({"base":"SauceLabs","browserName":"internet explorer","platform":"Windows 8.1","version":"11","tags":[],"name":"Karma and Sauce Labs demo","record-video":false,"record-screenshots":true,"build":null,"device-orientation":null,"disable-popup-handler":true}) "abf7c976abf1420a9c72b3e06c655040",null
INFO [launcher.sauce]: internet explorer 11 (Windows 8.1) session at https://saucelabs.com/tests/abf7c976abf1420a9c72b3e06c655040
DEBUG [launcher.sauce]: WebDriver channel for internet explorer 11 (Windows 8.1) instantiated, opening http://localhost:9876/?id=15483642
DEBUG [wd]:  > CALL get("http://localhost:9876/?id=15483642") 
DEBUG [wd]:  > POST /session/:sessionID/url {"url":"http://localhost:9876/?id=15483642"}
DEBUG [web-server]: serving: /Volumes/OSXSTORAGE/Users/a/Dropbox/a/WebstormProjects/a-ui/node_modules/karma/static/client.html
DEBUG [web-server]: serving: /Volumes/OSXSTORAGE/Users/a/Dropbox/a/WebstormProjects/a-ui/node_modules/karma/static/karma.js
DEBUG [wd]:  > RESPONSE get("http://localhost:9876/?id=15483642") 
DEBUG [karma]: A browser has connected on socket xXySXoeppVtPhAr8FVR4
INFO [IE 11.0.0 (Windows)]: Connected on socket xXySXoeppVtPhAr8FVR4 with id 15483642
DEBUG [launcher]: internet explorer 11 (Windows 8.1) on SauceLabs (id 15483642) captured in 17.693 secs
DEBUG [web-server]: serving: /Volumes/OSXSTORAGE/Users/a/Dropbox/a/WebstormProjects/a-ui/node_modules/karma/static/context.html
DEBUG [web-server]: serving (cached): /Volumes/OSXSTORAGE/Users/a/Dropbox/a/WebstormProjects/a-ui/src/components/angular/angular.js
................................................................................
..............DEBUG [karma]: A browser has connected on socket mGf0VzQ8DKdfW_NSFVR5
DEBUG [IE 11.0.0 (Windows)]: New connection mGf0VzQ8DKdfW_NSFVR5 (already have xXySXoeppVtPhAr8FVR4)
WARN [IE 11.0.0 (Windows)]: Disconnected (1 times), because no message in 10000 ms.

IE 11.0.0 (Windows): Executed 94 of 94 DISCONNECTED (11.481 secs / 0.757 secs)
DEBUG [launcher.sauce]: Shutting down the internet explorer 11 (Windows 8.1) driver
DEBUG [wd]:  > CALL get("about:blank") 
DEBUG [wd]:  > POST /session/:sessionID/url {"url":"about:blank"}
DEBUG [karma]: Run complete, exitting.
DEBUG [launcher]: Disconnecting all browsers
DEBUG [wd]:  > RESPONSE get("about:blank") 
DEBUG [wd]:  > CALL quit() 
DEBUG [wd]:  > DELETE /session/:sessionID 
DEBUG [wd]: 
Ending your web drivage..

DEBUG [wd]:  > RESPONSE quit()

我尝试将browserNoActivityTimeout增加到60000，但这只会导致测试在60s而不是10s后失败 . 其中每一个都失败了以下内容：

DEBUG [karma]: A browser has connected on socket mGf0VzQ8DKdfW_NSFVR5
DEBUG [IE 11.0.0 (Windows)]: New connection mGf0VzQ8DKdfW_NSFVR5 (already have xXySXoeppVtPhAr8FVR4)
WARN [IE 11.0.0 (Windows)]: Disconnected (1 times), because no message in 10000 ms.   
IE 11.0.0 (Windows): Executed 94 of 94 DISCONNECTED (11.481 secs / 0.757 secs)

根据浏览器的不同，有时它只执行50次测试（执行50次，共94次DISCONNECTED），而在其他测试中，它将执行所有测试，但仍被认为是测试运行失败 . 我从未见过这种情况发生在Chrome或Firefox上 .

完全相同的karma.conf文件将在本地运行，没有任何问题 . 有没有遇到过这个？我已经联系到酱油支持，但他们开始坚持认为这是一个因果酱酱 Launcher 问题 .

Karma.conf：

var fs = require('fs');

module.exports = function(config) {

  // Use ENV vars on Travis and sauce.json locally to get credentials
  if (!process.env.SAUCE_USERNAME) {
    if (!fs.existsSync('sauce.json')) {
      console.log('Create a sauce.json with your credentials based on the sauce-sample.json file.');
      process.exit(1);
    } else {
      process.env.SAUCE_USERNAME = require('./../sauce').username;
      process.env.SAUCE_ACCESS_KEY = require('./../sauce').accessKey;
    }
  }

  // Browsers to run on Sauce Labs
  var customLaunchers = {

    sl_safari_ml: {
      base: 'SauceLabs',
      browserName: 'safari',
      platform: 'OS X 10.9'

    }
  };

  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'],


    // list of files / patterns to load in the browser
    files: [
      'src/components/jquery/dist/jquery.js',
      'src/components/angular/angular.js',
      'src/components/angular-mocks/angular-mocks.js',
      'src/components/angular-cookies/angular-cookies.js',
      'src/components/angular-sanitize/angular-sanitize.js',
      'src/components/angular-ui-router/release/angular-ui-router.js',
      'src/components/angular-animate/angular-animate.js',
      'src/components/angular-strap/dist/angular-strap.js',
      'src/components/angular-strap/dist/angular-strap.tpl.js',
      'src/components/speakingurl/lib/index.js',
      'src/app/**/*.js',
      'src/app/common/templates/*.html'


    ],

    exclude: [
      'src/app/**/*.e2e.spec.js'

    ],
    ngHtml2JsPreprocessor: {
      stripPrefix: 'src/app/common/',
      moduleName: 'mywire.templates'
    },
    preprocessors: {
      // load templates
      'src/app/common/templates/*.html': ['ng-html2js']
    },
    // test results reporter to use
    // possible values: 'dots', 'progress'
    // available reporters: https://npmjs.org/browse/keyword/karma-reporter
    reporters: ['dots'],


    // web server port
    port: 9876,

    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,

    sauceLabs: {
      testName: 'Karma and Sauce Labs demo',
      startConnect: false
    },
    browserNoActivityTimeout: 60000,
    captureTimeout: 120000,
    customLaunchers: customLaunchers,

    // start these browsers
    // available browser launchers: https://npmjs.org/browse/keyword/karma-launcher
    browsers: Object.keys(customLaunchers),
    singleRun: true
  });
};