java - 当我显示对话框时，抛出异常 "UnhandledAlertException: Modal dialog present"

Question

我正在使用 Internet Explorer 9 登录一个使用 Selenium Webdriver 2.42.2 的网站。

当我输入凭据并按下登录按钮时，会弹出一个模态对话框:

You are already logged on to the same physical device. Do you wish logout from the previous login & login again?

所以有 2 个选项是/否。

我已经使用了 driver.switchTo().alert.accept() 但警报在出现后很快就消失了，不到一秒钟。它没有按应有的方式单击"is"按钮。

我的代码:

public class launch{
    public static void main(Sting args[]){
        driver.findElement(By.id("login")).click();// click performed

        launch obj = new launch();
        if(obj.isAlertPresent(driver) == true)
        {
            Thread.sleep(3000);
            driver.switchTo().alert();
            String a = driver.getTitle();
            System.out.println(a);
        }
    }
    public boolean isAlertPresent(WebDriver drive) throws InterruptedException 
    { 
        try 
        { 
            Thread.sleep(2000);
            drive.switchTo().alert(); 
            Thread.sleep(2000);
            return true; 
        }   
        catch (UnhandledAlertException Ex) 
        { 
            return false; 
        }
    }
}

日志:

Started InternetExplorerDriver server (64-bit)
2.42.0.0
Listening on port 5600
Exception in thread "main" org.openqa.selenium.UnhandledAlertException: Modal dialog present: You are already logged on to the same physical device. Do you wish logout from the previous login & login again ?

Driver info: org.openqa.selenium.ie.InternetExplorerDriver
Capabilities [{browserAttachTimeout=0, enablePersistentHover=true, ie.forceCreateProcessApi=false, ie.usePerProcessProxy=false, ignoreZoomSetting=false, handlesAlerts=true, version=9, platform=WINDOWS, nativeEvents=true, ie.ensureCleanSession=false, elementScrollBehavior=0, ie.browserCommandLineSwitches=, requireWindowFocus=false, browserName=internet explorer, , takesScreenshot=true, javascriptEnabled=true, ignoreProtectedModeSettings=false, enableElementCacheCleanup=true, cssSelectorsEnabled=true, unexpectedAlertBehaviour=dismiss}]
Session ID: e439a04d-98aa-45e3-ae87-ec30e6f2cd2a
    at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)
    at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)
    at java.lang.reflect.Constructor.newInstance(Unknown Source)
    at org.openqa.selenium.remote.ErrorHandler.createThrowable(ErrorHandler.java:204)
    at org.openqa.selenium.remote.ErrorHandler.createUnhandledAlertException(ErrorHandler.java:185)
    at org.openqa.selenium.remote.ErrorHandler.throwIfResponseFailed(ErrorHandler.java:152)
    at org.openqa.selenium.remote.RemoteWebDriver.execute(RemoteWebDriver.java:599)
    at org.openqa.selenium.remote.RemoteWebDriver.execute(RemoteWebDriver.java:614)
    at org.openqa.selenium.remote.RemoteWebDriver.getWindowHandle(RemoteWebDriver.java:489)
    at OneWebTest.webrio_launch.main(webrio_launch.java:29)

Answer 1

警报消失是因为 selenium 在抛出 UnhandledAlertException 时关闭了警报。您必须在任何其他 selenium 操作之前调用 driver.switchTo().alert.accept() 以避免抛出异常:

Alert alert = driver.switchTo().alert();
alert.accept();

不确定调用 driver.switchTo().alert() 两次是否有问题。