如何在Firefox中使用Selenium RC2将鼠标悬停在WebElement上 [英] How to mouseover a WebElement using Selenium RC2 in Firefox

问题描述

使用Selenium的Firefox WebDriver 2.20，我需要显示一个工具提示，当鼠标悬停在我的网页上的链接上时出现.

Using Selenium's Firefox WebDriver 2.20, I need to display a tooltip that appears when the mouse hovers over a link on my web page.

我尝试使用Selenium的Action类来执行此操作，但是却收到ClassCastException:$ Proxy7与org.openqa.selenium.internal.Locatable不兼容.到目前为止，这是我尝试过的:

I've tried using Selenium's Action class to do this, but I get a ClassCastException: $Proxy7 incompatible with org.openqa.selenium.internal.Locatable. Here is what I've tried so far:

Actions builder = new Actions(driver);
WebElement link = driver.findElement(By.tagName("a"));
builder.moveToElement(link).build().perform();

当我传递给函数的WebElement强制转换为Locatable对象时，ClassCastException发生在moveToElement()方法中.该方法是:

The ClassCastException happens in the moveToElement() method, when the WebElement that I passed to the function is cast to a Locatable object. The method is:

public Actions moveToElement(WebElement toElement) { 
   action.addAction(new MoveMouseAction(mouse, (Locatable) toElement)); 
   return this;
}

我也尝试了下面的代码，导致相同的错误:

I've also tried the code below, which resulted in the same error:

WebElement link = driver.findElement(By.tagName("a"));
Mouse mouse = ((HasInputDevices) driver).getMouse();
mouse.mouseDown(((Locatable)link).getCoordinates());

我听说这些方法在以前的Firefox版本中有效，但不适用于最新的Firefox版本(我使用的是FF12).如果是这样，是否还有其他方法可以模拟Selenium中的鼠标悬停?任何帮助使该功能正常工作的帮助将不胜感激！

I've heard that these methods worked in previous Firefox versions but not with recent Firefox versions (I'm using FF12). If that is true, are there any other ways of simulating a mouseover in Selenium? Any help getting this function to work would be greatly appreciated!

解决方案 经过一段时间的研究并尝试了不同的代码段后，我找到了解决该问题的方法.对于以后遇到此问题的任何人，我都必须为Firefox驱动程序禁用本机事件，如下所示:

SOLUTION After digging around for a while and trying different code snippets, I found a solution to the problem. For anyone who has this problem in the future, I had to disable native events for the Firefox driver, like so:

DesiredCapabilities cap = DesiredCapabilities.firefox();

FirefoxProfile prof = new FirefoxProfile(); 
prof.setEnableNativeEvents(false); 
cap.setCapability("firefox_profile", prof);

推荐答案

您可以使用Javascript来做到这一点:

You can use Javascript to do that:

string script = "var evt = document.createEvent('MouseEvents');" +
                        "evt.initMouseEvent('mouseover',true, true, window, 0, 0, 0, 0, 0, false, false, false, false, 0, null);" +
                        "arguments[0].dispatchEvent(evt);";
((IJavaScriptExecutor)driver).ExecuteScript(script, element);

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