Selenium Grid WebDriver 无法创建新的远程会话所需的功能

Question

我正在试用 Selenium Grid。我的测试是用 Selenium Python 编写的。我已经在我的本地机器上启动了 Grid hub，我已经在同一台机器上使用 json 文件为 IE 注册了节点。我运行硒样品测试，我得到以下错误：

Unable to create new remote session desired capabilities

完整错误跟踪：

    Traceback (most recent call last):
  File "E:\RL Fusion\projects\Selenium Grid\Selenium Grid Sample\Test1 working - try json config file 2\Test1.py", line 21, in setUp
    desired_capabilities=desired_cap)
  File "C:\Python27\lib\site-packages\selenium\webdriver\remote\webdriver.py", line 89, in __init__
    self.start_session(desired_capabilities, browser_profile)
  File "C:\Python27\lib\site-packages\selenium\webdriver\remote\webdriver.py", line 138, in start_session
    'desiredCapabilities': desired_capabilities,
  File "C:\Python27\lib\site-packages\selenium\webdriver\remote\webdriver.py", line 195, in execute
    self.error_handler.check_response(response)
  File "C:\Python27\lib\site-packages\selenium\webdriver\remote\errorhandler.py", line 170, in check_response
    raise exception_class(message, screen, stacktrace)
WebDriverException: Message: Unable to create new remote session. desired capabilities = Capabilities [{browserName=internet explorer, javascriptEnabled=true, platform=WINDOWS}], required capabilities = null
Build info: version: '3.0.0-beta3', revision: 'c7b525d', time: '2016-09-01 14:57:03 -0700'
System info: host: 'OptimusPrime-PC', ip: '192.168.0.2', os.name: 'Windows 8.1', os.arch: 'x86', os.version: '6.3', java.version: '1.8.0_31'
Driver info: driver.version: InternetExplorerDriver
Stacktrace:
    at org.openqa.selenium.remote.ProtocolHandshake.createSession (ProtocolHandshake.java:80)
    at org.openqa.selenium.remote.HttpCommandExecutor.execute (HttpCommandExecutor.java:141)
    at org.openqa.selenium.remote.service.DriverCommandExecutor.execute (DriverCommandExecutor.java:82)
    at org.openqa.selenium.remote.RemoteWebDriver.execute (RemoteWebDriver.java:597)
    at org.openqa.selenium.remote.RemoteWebDriver.startSession (RemoteWebDriver.java:242)
    at org.openqa.selenium.remote.RemoteWebDriver.startSession (RemoteWebDriver.java:228)
    at org.openqa.selenium.ie.InternetExplorerDriver.run (InternetExplorerDriver.java:180)
    at org.openqa.selenium.ie.InternetExplorerDriver.<init> (InternetExplorerDriver.java:172)
    at org.openqa.selenium.ie.InternetExplorerDriver.<init> (InternetExplorerDriver.java:148)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance0 (None:-2)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance (None:-1)
    at sun.reflect.DelegatingConstructorAccessorImpl.newInstance (None:-1)
    at java.lang.reflect.Constructor.newInstance (None:-1)
    at org.openqa.selenium.remote.server.DefaultDriverProvider.callConstructor (DefaultDriverProvider.java:103)
    at org.openqa.selenium.remote.server.DefaultDriverProvider.newInstance (DefaultDriverProvider.java:97)
    at org.openqa.selenium.remote.server.DefaultDriverFactory.newInstance (DefaultDriverFactory.java:60)
    at org.openqa.selenium.remote.server.DefaultSession$BrowserCreator.call (DefaultSession.java:222)
    at org.openqa.selenium.remote.server.DefaultSession$BrowserCreator.call (DefaultSession.java:209)
    at java.util.concurrent.FutureTask.run (None:-1)
    at org.openqa.selenium.remote.server.DefaultSession.run (DefaultSession.java:176)
    at java.util.concurrent.ThreadPoolExecutor.runWorker (None:-1)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run (None:-1)
    at java.lang.Thread.run (None:-1)

json.cfg.json 配置实现：

    {
  "class": "org.openqa.grid.common.RegistrationRequest",
  "capabilities": [
    {
      "seleniumProtocol": "WebDriver",
      "browserName": "internet explorer",
      "version": "11",
      "maxInstances": 1,
      "platform" : "WIN7"   }
    ],
    "configuration" : {
      "port": 5555,
      "register": true,
      "host": "192.168.0.6",
      "proxy": "org.openqa.grid.selenium.proxy.   DefaultRemoteProxy",
      "maxSession": 2,
      "hubHost": "192.168.0.6",
      "role": "webdriver",
      "registerCycle": 5000,
      "hub": "http://192.168.0.6:4444/grid/register",
      "hubPort": 4444,
      "remoteHost": "http://localhost:4444"
    }
}

我的 Selenium Python 文件中的设置方法是：

def setUp(self):
        desired_cap = {'browserName': 'internet explorer',
        #'platform': 'WIN8_1',
        'platform': 'WIN7',
        'javascriptEnabled': True}


    self.driver = webdriver.Remote(
        command_executor='http://localhost:4444/wd/hub',
        desired_capabilities=desired_cap)

我做错了什么？我想要的功能配置不正确吗？我注意到在完整的跟踪日志中它说 Win 8.1
我已经提到了平台的 Win7。我不知道为什么要尝试 Win 8.1

我现在已将所需的功能更改为以下内容：

desired_cap = {'browserName': 'internet explorer',
        'platform': 'windows',
        'javascriptEnabled': True,
'InternetExplorerDriver.INTRODUCE_FLAKINESS_BY_IGNORING_SECURITY_DOMAINS': True
}

我现在得到错误：

WebDriverException: Message: Error forwarding the new session cannot find : Capabilities [{browserName=internet explorer, InternetExplorerDriver.INTRODUCE_FLAKINESS_BY_IGNORING_SECURITY_DOMAINS=true, javascriptEnabled=true, platform=XP}]

我需要一些帮助。谢谢，里亚兹

Answer 1

网格在其 DefaultCapabilitiesMatcher 中使用以下三个属性来决定应将新会话请求路由到哪个节点：

Platform
BrowserType
浏览器版本

在您的情况下，根据您所做的更改，您的测试要求在 Windows 上具有 IE 运行的节点，但在您的 nodeConfig.json 中，您基本上指定了 "WIN7".

我认为指定 "WINDOWS" 对您不起作用。您可以尝试更改您想要的功能以引用 WIN7，这应该有效。

Answer 2

保持IE的安全设置为中（中到高），并为所有启用保护模式。

然后问题就解决了。

Selenium Grid WebDriver 无法创建新的远程会话所需的功能

Selenium Grid WebDriver Unable to create new remote session desired capabilities

selenium-grid

python-2.7

selenium-webdriver