Selenium WebDriverException:未知错误:使用Java调用函数结果缺少'value'

Question

当我尝试在java中使用selenium webdriver运行我的第一个测试用例时,我得到以下异常.有人可以帮我解决问题.....

Starting ChromeDriver 2.33.506120 (e3e53437346286c0bc2d2dc9aa4915ba81d9023f) on port 48523
Only local connections are allowed.
log4j:WARN No appenders could be found for logger (org.apache.http.client.protocol.RequestAddCookies).
log4j:WARN Please initialize the log4j system properly.
log4j:WARN See http://logging.apache.org/log4j/1.2/faq.html#noconfig for more info.
Mar 29, 2018 7:34:16 AM org.openqa.selenium.remote.ProtocolHandshake createSession
INFO: Detected dialect: OSS
Exception in thread "main" org.openqa.selenium.WebDriverException: unknown error: call function result missing 'value'
(Session info: chrome=65.0.3325.181)
(Driver info: chromedriver=2.33.506120 (e3e53437346286c0bc2d2dc9aa4915ba81d9023f),platform=Windows NT 6.3.9600 x86_64) (WARNING: The server did not provide any     stacktrace information)
Command duration or timeout: 31 milliseconds
Build info: version: '3.4.0', revision: 'unknown', time: 'unknown'
System info: host: 'NIL-MKODAGA-D13', ip: '172.16.20.242', os.name: 'Windows 8.1', os.arch: 'amd64', os.version: '6.3', java.version: '9.0.1'
Driver info: org.openqa.selenium.chrome.ChromeDriver
Capabilities [{applicationCacheEnabled=false, rotatable=false, mobileEmulationEnabled=false, networkConnectionEnabled=false, chrome=    {chromedriverVersion=2.33.506120 (e3e53437346286c0bc2d2dc9aa4915ba81d9023f), userDataDir=C:\Users\mkodagan\AppData\Local\Temp\scoped_dir4652_10811},    takesHeapSnapshot=true, pageLoadStrategy=normal, databaseEnabled=false, handlesAlerts=true, hasTouchScreen=false, version=65.0.3325.181, platform=WIN8_1,   browserConnectionEnabled=false, nativeEvents=true, acceptSslCerts=true, locationContextEnabled=true, webStorageEnabled=true, browserName=chrome,    takesScreenshot=true, javascriptEnabled=true, cssSelectorsEnabled=true, setWindowRect=true, unexpectedAlertBehaviour=}]
Session ID: 1a39885769cc96406e2f2732c361c049
    at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
    at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)
    at java.base/jdk.internal.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)
    at java.base/java.lang.reflect.Constructor.newInstance(Unknown Source)
    at org.openqa.selenium.remote.ErrorHandler.createThrowable(ErrorHandler.java:215)
    at org.openqa.selenium.remote.ErrorHandler.throwIfResponseFailed(ErrorHandler.java:167)
    at org.openqa.selenium.remote.RemoteWebDriver.execute(RemoteWebDriver.java:671)
    at org.openqa.selenium.remote.RemoteWebElement.execute(RemoteWebElement.java:272)
    at org.openqa.selenium.remote.RemoteWebElement.sendKeys(RemoteWebElement.java:96)
    at com.ham.scripts.ClickOnAllLinks.main(ClickOnAllLinks.java:44)

Answer 1

错误说明了一切:

Exception in thread "main" org.openqa.selenium.WebDriverException: unknown error: call function result missing 'value'
(Session info: chrome=65.0.3325.181)
(Driver info: chromedriver=2.33.506120 (e3e53437346286c0bc2d2dc9aa4915ba81d9023f),platform=Windows NT 6.3.9600 x86_64) 
Build info: version: '3.4.0', revision: 'unknown', time: 'unknown'
System info: host: 'NIL-MKODAGA-D13', ip: '172.16.20.242', os.name: 'Windows 8.1', os.arch: 'amd64', os.version: '6.3', java.version: '9.0.1'
Driver info: org.openqa.selenium.chrome.ChromeDriver

该错误清楚地表明Selenium Client和ChromeDriver未被检测到,如:

Build info: version: '3.4.0', revision: 'unknown', time: 'unknown'  
Driver info: org.openqa.selenium.chrome.ChromeDriver

您的主要问题是您使用的二进制文件之间的版本兼容性如下:

• 您正在使用chromedriver = 2.33
• chromedriver发行说明= 2.33明确提到以下内容:

支持Chrome v60-62

• 您正在使用chrome = 65.0
• ChromeDriver v2.37的发行说明明确提到以下内容:

支持Chrome v64-66

• 您的Selenium客户端版本是3.4.0,其中有点旧.

因此,Selenium Client v3.4.0,ChromeDriver版本(v2.33)和Chrome浏览器版本(v65.0)之间明显不匹配

解

• 将Selenium升级到当前级别版本3.11.0.
• 升级ChromeDriver当前ChromeDriver v2.37水平.
• 将Chrome版本保持在Chrome v65.x级别.(根据ChromeDriver v2.37发行说明)
• 清理你的项目工作,通过你的IDE和重建仅需要依赖你的项目.
• 使用CCleaner工具在执行测试套件之前和之后擦除所有操作系统.
• 如果您的基本Web客户端版本太旧,请通过Revo Uninstaller将其卸载并安装最新的GA和已发布的Web客户端版本.
• 进行系统重启.
• 执行你的@Test.