如何在弹出的selenium web驱动程序中设置警报取消

Question

我是Selenium webdriver的新手。有人可以帮我解决如何取消以下代码的提醒

<div id="popup1" class="k-window-content k-content" style="" data-role="window" tabindex="0" role="dialog" aria-labelledby="popup1_wnd_title">
<div class="popupWrap">
          Policy violation                        
<div class="wrap-keyword">
          Note                         
<textarea id="flagtxtnote" cols="50" rows="4"/>
<fieldset class="full-width">
<input id="btnflagcancel" class="more gray-theme" type="button" value="Flag" onclick="saveclick(4, 0);"/>
<input id="btnflagsave" class="more icon-hat" type="button" value="Flag" onclick="saveclick(4, 1);"/>
</fieldset>
</div>
</div>

我试过下面的代码

    try 
    {
        //Handle the alert pop-up using seithTO alert statement
        Alert alert = dr.switchTo().alert();

        //Print alert is present
        System.out.println("Alert is present");

        //get the message which is present on pop-up
        String message = alert.getText();

        //print the pop-up message
        System.out.println(message);

        alert.sendKeys("");
        //Click on OK button on pop-up
        alert.accept();
    } 
    catch (NoAlertPresentException e) 
    {
        //if alert is not present print message
        System.out.println("alert is not present");
    }

输出显示（警报不存在）