Firefox 12.0 和 Selenium 2 : Native Events are not supported

Question

使用 webdriver 运行 Selenium 2.21.0 构建时，在针对 Firefox 12.0 运行时出现以下错误:

org.openqa.selenium.InvalidElementStateException: Cannot perform native interaction: Could not load native events component.
Command duration or timeout: 20.08 seconds
Build info: version: '2.2.1', revision: '16551', time: '2012-04-11 21:42:35'
System info: os.name: 'Windows 7', os.arch: 'x86', os.version: '6.1', java.version: '1.6.0_26'
Driver info: driver.version: RemoteWebDriver
    at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
    at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
    at java.lang.reflect.Constructor.newInstance(Constructor.java:513)
    at org.openqa.selenium.remote.ErrorHandler.createThrowable(ErrorHandler.java:175)
    at org.openqa.selenium.remote.ErrorHandler.throwIfResponseFailed(ErrorHandler.java:128)
    at org.openqa.selenium.remote.RemoteWebDriver.execute(RemoteWebDriver.java:459)
    at org.openqa.selenium.remote.ExecuteMethod.execute(ExecuteMethod.java:47)
    at org.openqa.selenium.remote.RemoteMouse.mouseMove(RemoteMouse.java:89)
    at org.openqa.selenium.interactions.internal.MouseAction.moveToLocation(MouseAction.java:31)
    at org.openqa.selenium.interactions.ClickAndHoldAction.perform(ClickAndHoldAction.java:39)
    at org.openqa.selenium.interactions.CompositeAction.perform(CompositeAction.java:32)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
    at java.lang.reflect.Method.invoke(Method.java:597)
    at org.codehaus.groovy.runtime.callsite.PojoMetaMethodSite$PojoCachedMethodSiteNoUnwrapNoCoerce.invoke(PojoMetaMethodSite.java:229)
    at org.codehaus.groovy.runtime.callsite.PojoMetaMethodSite.call(PojoMetaMethodSite.java:52)
    at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCall(CallSiteArray.java:40)
    at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:117)
    at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:121)
    at isishelper.ActionHelper.placement_placeSampleOnContainer(ActionHelper.groovy:195)
...

在这种情况下，我的代码如下:

List sourceSamples = sourceTable.findElements((By.className("x-grid-row")))
List poolTargets = driver.findElements(By.className("pool-box"))
target = poolTargets[0]    
def source = sourceSamples[0]
// Then drag and drop the sample to target
(new Actions(driver)).dragAndDrop(source, target).perform()

我假设这是缺少功能，因为 Selenium 2.21 是在 Firefox 12.0 之前发布的，而不是我设置驱动程序时出错？

检查驱动程序属性:

driver.getCapabilities().asMap().each { 
             index, value -> println("$index : $value") 
}

browserName : firefox
nativeEvents : false
takesScreenshot : true
version : 12.0

但是在使用配置文件创建驱动程序时，我得到 nativeEvents = true :

profile.setEnableNativeEvents(true); 
println profile.getProperties()
driver = new FirefoxDriver(profile)

[enableNativeEvents:true, 
class:class org.openqa.selenium.firefox.FirefoxProfile,
additionalPreferences:org.openqa.selenium.firefox.Preferences@82d37]

Answer 1

webdriver 2.21 尚不支持本地事件。根据 changelog目前只有 FF10 和 11 实现了此功能。

我不知道这是否与问题有关，但是在代码的最后一行中，您不应该在调用 perform() 之前调用 build() 吗？ (这必须在 Java 中完成)

更多的堆栈跟踪可能会有所帮助。您在哪一行收到此错误？您是否尝试过将 native 事件显式设置为 false？