Angularjs 量角器和元素浏览器解析页面上的元素时出现问题

我可以对localhost运行我的量角器测试，但是当运行我的内部测试服务器时，我无法让量角器在页面上找到元素。使用最新的Chrome和Firefox驱动程序的Digrator 1.3.1和1.4.0也会出现同样的问题

...AppData\Roaming\npm\node_modules\protractor\node_modules\selenium-webdriver\lib\atoms\error.js:113
  var template = new Error(this.message);
                 ^
Process finished with exit code 1

因此，我一直在尝试使用Element explorer来调试该问题，但它给了我以下信息：

> list(by.css('#logindropdown'))
There was a webdriver error: UnknownError unknown error: Runtime.evaluate threw exception: TypeError: Cannot read property 'click' of null
  (Session info: chrome=38.0.2125.111)
  (Driver info: chromedriver=2.12.301325 (962dea43ddd90e7e4224a03fa3c36a421281abb7),platform=Windows NT 6.1 SP1 x86_64) (WARNING: The server did not provide any stacktrace information)
Command duration or timeout: 28 milliseconds
Build info: version: '2.44.0', revision: '76d78cf', time: '2014-10-23 20:02:37'
System info: host: 'NB2D1469', ip: '158.147.71.49', os.name: 'Windows 7', os.arch: 'amd64', os.version: '6.1', java.version: '1.7.0_67'
Session ID: 85966371ff89f75af8cf7fb5d15f6f23
Driver info: org.openqa.selenium.chrome.ChromeDriver
Capabilities [{platform=XP, acceptSslCerts=true, javascriptEnabled=true, browserName=chrome, chrome={userDataDir=C:\Users\mprent99\AppData\Local\Temp\scoped_dir6488_12276}, rotatable=false, locationContextEnabled=true, mobileEmulationEnabled=false, version=38.0
.2125.111, takesHeapSnapshot=true, cssSelectorsEnabled=true, databaseEnabled=false, handlesAlerts=true, browserConnectionEnabled=false, webStorageEnabled=true, nativeEvents=true, applicationCacheEnabled=false, takesScreenshot=true}]

 at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
        at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57)
        at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
        at java.lang.reflect.Constructor.newInstance(Constructor.java:526)
        at org.openqa.selenium.remote.ErrorHandler.createThrowable(ErrorHandler.java:204)
        at org.openqa.selenium.remote.ErrorHandler.throwIfResponseFailed(ErrorHandler.java:156)
        at org.openqa.selenium.remote.RemoteWebDriver.execute(RemoteWebDriver.java:599)
        at org.openqa.selenium.remote.RemoteWebDriver.executeAsyncScript(RemoteWebDriver.java:526)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:606)
        at org.openqa.selenium.support.events.EventFiringWebDriver$2.invoke(EventFiringWebDriver.java:101)
        at com.sun.proxy.$Proxy1.executeAsyncScript(Unknown Source)
        at org.openqa.selenium.support.events.EventFiringWebDriver.executeAsyncScript(EventFiringWebDriver.java:225)
        at org.openqa.selenium.remote.server.handler.ExecuteAsyncScript.call(ExecuteAsyncScript.java:55)
        at java.util.concurrent.FutureTask.run(FutureTask.java:262)
        at org.openqa.selenium.remote.server.DefaultSession$1.run(DefaultSession.java:168)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
        at java.lang.Thread.run(Thread.java:745)

像

list（by.css（'body'））

这样的简单事情也会给出上述相同的例外情况。使用by.id给出相同的结果，

list（by.id（'logindropdown'））

没有结果的命令（当它们应该时）似乎可以避免异常：

> list(by.css('a .caret'))
[ '' ]
> list(by.css('.caret'))
[ '' ]

在webdriver manager终端中，我看到以下内容：

> list(by.css('#logindropdown'))
There was a webdriver error: UnknownError unknown error: Runtime.evaluate threw exception: TypeError: Cannot read property 'click' of null
  (Session info: chrome=38.0.2125.111)
  (Driver info: chromedriver=2.12.301325 (962dea43ddd90e7e4224a03fa3c36a421281abb7),platform=Windows NT 6.1 SP1 x86_64) (WARNING: The server did not provide any stacktrace information)
Command duration or timeout: 28 milliseconds
Build info: version: '2.44.0', revision: '76d78cf', time: '2014-10-23 20:02:37'
System info: host: 'NB2D1469', ip: '158.147.71.49', os.name: 'Windows 7', os.arch: 'amd64', os.version: '6.1', java.version: '1.7.0_67'
Session ID: 85966371ff89f75af8cf7fb5d15f6f23
Driver info: org.openqa.selenium.chrome.ChromeDriver
Capabilities [{platform=XP, acceptSslCerts=true, javascriptEnabled=true, browserName=chrome, chrome={userDataDir=C:\Users\mprent99\AppData\Local\Temp\scoped_dir6488_12276}, rotatable=false, locationContextEnabled=true, mobileEmulationEnabled=false, version=38.0
.2125.111, takesHeapSnapshot=true, cssSelectorsEnabled=true, databaseEnabled=false, handlesAlerts=true, browserConnectionEnabled=false, webStorageEnabled=true, nativeEvents=true, applicationCacheEnabled=false, takesScreenshot=true}]

 at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
        at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57)
        at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
        at java.lang.reflect.Constructor.newInstance(Constructor.java:526)
        at org.openqa.selenium.remote.ErrorHandler.createThrowable(ErrorHandler.java:204)
        at org.openqa.selenium.remote.ErrorHandler.throwIfResponseFailed(ErrorHandler.java:156)
        at org.openqa.selenium.remote.RemoteWebDriver.execute(RemoteWebDriver.java:599)
        at org.openqa.selenium.remote.RemoteWebDriver.executeAsyncScript(RemoteWebDriver.java:526)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:606)
        at org.openqa.selenium.support.events.EventFiringWebDriver$2.invoke(EventFiringWebDriver.java:101)
        at com.sun.proxy.$Proxy1.executeAsyncScript(Unknown Source)
        at org.openqa.selenium.support.events.EventFiringWebDriver.executeAsyncScript(EventFiringWebDriver.java:225)
        at org.openqa.selenium.remote.server.handler.ExecuteAsyncScript.call(ExecuteAsyncScript.java:55)
        at java.util.concurrent.FutureTask.run(FutureTask.java:262)
        at org.openqa.selenium.remote.server.DefaultSession$1.run(DefaultSession.java:168)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
        at java.lang.Thread.run(Thread.java:745)

及

正在使用的版本：

protractor --version
Version 1.4.0 or Version 1.3.1 
node --version
v0.10.30
webdriver-manager status
selenium standalone is up to date
chromedriver is up to date
IEDriver is not present

这些同样的东西在Chrome开发工具中也能正常工作：

('.caret')
[<b class=​"caret">​</b>​]
$('a .caret')
[<b class=​"caret">​</b>​]
$('#logindropdown')
[<li id=​"logindropdown" class=​"dropdown ng-scope">​…​</li>​]
$('body')
[<body class=​"vertical-grow">​…​</body>​]

下面是conf.js的其余部分：

/*global browser,element,by */
var env = require('./env.js');

exports.config = {
    seleniumAddress: 'http://localhost:4444/wd/hub',

    specs: [
        'loginTest.js'
    ],

    suites: {
        //smoke: 'spec/smoketests/*.js',
        //full: 'spec/*.js'
    },

    directConnect: false,

    multiCapabilities: [
//        {browserName: 'firefox'}
        {browserName: 'chrome'}
    ],

    maxSessions: -1,

    framework: 'jasmine',

    // Options to be passed to Jasmine-node.
    jasmineNodeOpts: {
        // If true, display spec names.
        isVerbose: false,
        // If true, print colors to the terminal.
        showColors: true,
        // If true, include stack traces in failures.
        includeStackTrace: true,
        // Default time to wait in ms before a test fails.
        defaultTimeoutInterval: 360000
    },

    // Selector for the element housing the angular app - this defaults to
    // body, but is necessary if ng-app is on a descendant of <body>
    rootElement: 'html'
};

/*全局浏览器，元素，按*/
var env=require（'./env.js'）；
exports.config={
赛琳娜的裙子：'http://localhost:4444/wd/hub',
规格：[
'loginTest.js'
],
套房：{
//冒烟：“spec/smoketests/*.js”，
//完整：“spec/*.js”
},
directConnect:错误，
多容量：[
//{browserName:'firefox'}
{browserName:'chrome'}
],
maxSessions:-1，
框架：“茉莉花”，
//要传递给Jasmine节点的选项。
茉莉花：{
//如果为true，则显示等级库名称。
isVerbose:false，
//如果为true，则向终端打印颜色。
showColors：对，
//如果为true，则在失败中包括堆栈跟踪。
includeStackTrace：正确，
//测试失败前的默认等待时间（毫秒）。
defaultTimeoutInterval:360000
},
//用于容纳角度应用程序的元素的选择器-默认为
//主体，但如果ng app位于
rootElement:'html'
};

如何进一步调试此问题并找到问题的根源