Java WebDriver>上下文菜单WebDriver 2.42和Firefox v31

我有Firefox23和webdriver 2.35，下面的代码点击上下文菜单工作正常，但我最近将firefox升级到31版，webdriver升级到2.42版，我无法点击上下文菜单

public static void clickTreeMenuItem(String treeNodeText, String menuItemText){

    rightClickTreeNode(treeNodeText);
    contextClick(menuItemText);
}


public static void rightClickTreeNode(String nodeText){


    List<WebElement> treeNodes = driver.findElements(By.className("class-name"));
    for(WebElement treeNode : treeNodes){
        if(treeNode.getText().equals(nodeText)){

            Actions builder = new Actions(driver);
            Action rightClick = builder.contextClick(treeNode).build();
            rightClick.perform();

        }
    }
}

public static void contextClick(String menuItem){

    waitFor(ExpectedConditions.presenceOfAllElementsLocatedBy(By.className("x-menu-list-item")));
    List<WebElement> allMenuItems = driver.findElements(By.className("x-menu-list-item"));

    for(WebElement item : allMenuItems){
        if(item.getText().equals(menuItem)){
            item.click();
            break;
        }
    }       
}

 <div class=" x-menu-list" style="height: 72px;">
    <div id="x-menu-el-xx" class="x-menu-list-item ">
        <span id="com.xx" class=" x-menu-item x-unselectable x-component" unselectable="on" style="color: black;">
            New Item
        </span>
    </div>

上下文菜单的HTML源代码

public static void clickTreeMenuItem(String treeNodeText, String menuItemText){

    rightClickTreeNode(treeNodeText);
    contextClick(menuItemText);
}


public static void rightClickTreeNode(String nodeText){


    List<WebElement> treeNodes = driver.findElements(By.className("class-name"));
    for(WebElement treeNode : treeNodes){
        if(treeNode.getText().equals(nodeText)){

            Actions builder = new Actions(driver);
            Action rightClick = builder.contextClick(treeNode).build();
            rightClick.perform();

        }
    }
}

public static void contextClick(String menuItem){

    waitFor(ExpectedConditions.presenceOfAllElementsLocatedBy(By.className("x-menu-list-item")));
    List<WebElement> allMenuItems = driver.findElements(By.className("x-menu-list-item"));

    for(WebElement item : allMenuItems){
        if(item.getText().equals(menuItem)){
            item.click();
            break;
        }
    }       
}

 <div class=" x-menu-list" style="height: 72px;">
    <div id="x-menu-el-xx" class="x-menu-list-item ">
        <span id="com.xx" class=" x-menu-item x-unselectable x-component" unselectable="on" style="color: black;">
            New Item
        </span>
    </div>

---

当前行为：我看到右键单击发生，并看到上下文菜单，但单击没有发生。我看不到任何相关的例外，webdriver正在进入下一步。有指针吗？

当我使用“x-menu-item”而不是“x-menu-list-item”时，问题得到了解决

public static void contextClick(String menuItem){

waitFor(ExpectedConditions.presenceOfAllElementsLocatedBy(By.className("x-menu-item")));
List<WebElement> allMenuItems = driver.findElements(By.className("x-menu-item"));

for(WebElement item : allMenuItems){
    if(item.getText().equals(menuItem)){
        item.click();
        break;
    }
}       
}