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我一直在尋找方法來創建一個合理的結構，以便在Node.js中使用BrowserStack專門進行可伸縮測試。BrowserStack - Node.js併發測試
請查看這裏的源：
https://gist.github.com/Palgie/10886008
我得到試圖關閉會話或退出驅動程序，以便運行並行測試時，它會經常告訴我，我的最大會話使用（當一個問題見下文）。
這感覺就像是一種競爭條件，但它可能是一件非常明顯的事情。
Now testing Chrome - 22.0
Now testing IE - 10.0
․․․․
Stopping test
Stopping test
․
4 passing (14s)
1 failing
1) "after all" hook:
Error: This driver instance does not have a valid session ID (did you call WebDriver.quit()?) and may no longer be used.
at checkHasNotQuit (/Users/gourleyp/Sites/bs-webdriver/node_modules/browserstack-webdriver/lib/webdriver/webdriver.js:291:13)
at webdriver.WebDriver.schedule (/Users/gourleyp/Sites/bs-webdriver/node_modules/browserstack-webdriver/lib/webdriver/webdriver.js:263:3)
at webdriver.WebDriver.quit (/Users/gourleyp/Sites/bs-webdriver/node_modules/browserstack-webdriver/lib/webdriver/webdriver.js:331:21)
at Context.<anonymous> (/Users/gourleyp/Sites/bs-webdriver/driver.js:35:14)
at webdriver.promise.ControlFlow.runInNewFrame_ (/Users/gourleyp/Sites/bs-webdriver/node_modules/browserstack-webdriver/lib/webdriver/promise.js:1598:20)
at webdriver.promise.ControlFlow.runEventLoop_ (/Users/gourleyp/Sites/bs-webdriver/node_modules/browserstack-webdriver/lib/webdriver/promise.js:1463:8)
at wrapper [as _onTimeout] (timers.js:252:14)
at Timer.listOnTimeout [as ontimeout] (timers.js:110:15)
==== async task ====
at Context.<anonymous> (/Users/gourleyp/Sites/bs-webdriver/node_modules/browserstack-webdriver/testing/index.js:126:14)
at Hook.Runnable.run (/usr/local/lib/node_modules/mocha/lib/runnable.js:196:15)
at next (/usr/local/lib/node_modules/mocha/lib/runner.js:259:10)
at /usr/local/lib/node_modules/mocha/lib/runner.js:271:7
at done (/usr/local/lib/node_modules/mocha/lib/runnable.js:185:5)
at /usr/local/lib/node_modules/mocha/lib/runnable.js:199:9
at /Users/gourleyp/Sites/bs-webdriver/node_modules/browserstack-webdriver/testing/index.js:92:5
at /Users/gourleyp/Sites/bs-webdriver/node_modules/browserstack-webdriver/lib/goog/base.js:1178:15
at webdriver.promise.ControlFlow.runInNewFrame_ (/Users/gourleyp/Sites/bs-webdriver/node_modules/browserstack-webdriver/lib/webdriver/promise.js:1598:20)
at notify (/Users/gourleyp/Sites/bs-webdriver/node_modules/browserstack-webdriver/lib/webdriver/promise.js:428:12)
at notifyAll (/Users/gourleyp/Sites/bs-webdriver/node_modules/browserstack-webdriver/lib/webdriver/promise.js:397:7)
at resolve (/Users/gourleyp/Sites/bs-webdriver/node_modules/browserstack-webdriver/lib/webdriver/promise.js:375:7)
at fulfill (/Users/gourleyp/Sites/bs-webdriver/node_modules/browserstack-webdriver/lib/webdriver/promise.js:493:5)
at /Users/gourleyp/Sites/bs-webdriver/node_modules/browserstack-webdriver/lib/webdriver/promise.js:1465:10
at Object.webdriver.promise.asap (/Users/gourleyp/Sites/bs-webdriver/node_modules/browserstack-webdriver/lib/webdriver/promise.js:732:5)
at newFrame.then.e (/Users/gourleyp/Sites/bs-webdriver/node_modules/browserstack-webdriver/lib/webdriver/promise.js:1614:25)
at /Users/gourleyp/Sites/bs-webdriver/node_modules/browserstack-webdriver/lib/goog/base.js:1178:15
at webdriver.promise.ControlFlow.runInNewFrame_ (/Users/gourleyp/Sites/bs-webdriver/node_modules/browserstack-webdriver/lib/webdriver/promise.js:1598:20)
at notify (/Users/gourleyp/Sites/bs-webdriver/node_modules/browserstack-webdriver/lib/webdriver/promise.js:428:12)
at notifyAll (/Users/gourleyp/Sites/bs-webdriver/node_modules/browserstack-webdriver/lib/webdriver/promise.js:397:7)
at resolve (/Users/gourleyp/Sites/bs-webdriver/node_modules/browserstack-webdriver/lib/webdriver/promise.js:375:7)
at fulfill (/Users/gourleyp/Sites/bs-webdriver/node_modules/browserstack-webdriver/lib/webdriver/promise.js:493:5)
at webdriver.promise.ControlFlow.resolveFrame_ (/Users/gourleyp/Sites/bs-webdriver/node_modules/browserstack-webdriver/lib/webdriver/promise.js:1519:9)
at webdriver.promise.ControlFlow.getNextTask_ (/Users/gourleyp/Sites/bs-webdriver/node_modules/browserstack-webdriver/lib/webdriver/promise.js:1488:12)
at webdriver.promise.ControlFlow.runEventLoop_ (/Users/gourleyp/Sites/bs-webdriver/node_modules/browserstack-webdriver/lib/webdriver/promise.js:1446:59)
at wrapper [as _onTimeout] (timers.js:252:14)
at Timer.listOnTimeout [as ontimeout] (timers.js:110:15)
在來源我參考，據我瞭解，它應該執行會議，但它不覺得喜歡它。
test.after(function() {
console.log('Stopping test');
driver.quit();
});
據我瞭解它在瀏覽器中運行的所有摩卡測試或測試的webdriver後那麼它會終止驅動程序和方法之前，它會接着初始化一個新的實例。
任何幫助，將不勝感激！
乾杯