java - 尽管我可以通过 xpath 选择元素，但在 Firefox 中获取 ElementNotVisibleException 异常

Question

代码:

package com.selenium;

import org.openqa.selenium.Alert;
import org.openqa.selenium.By;
import org.openqa.selenium.WebDriver;
import org.openqa.selenium.WebElement;
import org.openqa.selenium.firefox.FirefoxDriver;

public class Monster {
    public static void main(String[] args)throws Exception{

        WebDriver window=new FirefoxDriver();
        try{
            window.get("https://my.monsterindia.com/login.html?src=http://my.monsterindia.com/my_monster.html&rand=5257");
            WebElement wb=window.findElement(By.id("BodyContent:txtUsername"));
            wb.sendKeys("shantanunandan8@gmail.com");
            window.findElement(By.id("BodyContent_txtPassword")).sendKeys("sha1nta1nu");
            Thread.sleep(4000);
            window.findElement(By.xpath("//input[@name='submit']")).click();
            Thread.sleep(4000);
            window.findElement(By.name("cancel")).click();
            window.findElement(By.className("flyout_close")).click();
            Thread.sleep(4000);
            window.findElement(By.xpath("//img[@src='http://media.monsterindia.com/monster_2012/trans.gif']")).click();
            Thread.sleep(4000);
            Alert alt=window.switchTo().alert();
            System.out.println("Massage from alert is "+alt.getText());
            alt.dismiss();
        }catch(Exception e){
            e.printStackTrace();
            Thread.sleep(4000);
            window.findElement(By.xpath("//input[@value='Cancel']")).click();
            System.out.println("Closing");
            window.close();
        }//catch close
        finally{
            window.close();
        }//finally close
    }//main close

}//class close

异常(exception):

org.openqa.selenium.ElementNotVisibleException: Element is not currently visible and so may not be interacted with
Command duration or timeout: 47 milliseconds
Build info: version: '2.39.0', revision: 'ff23eac', time: '2013-12-16 16:12:12'
System info: host: 'omega-d52b83806', ip: '10.0.0.5', os.name: 'Windows XP', os.arch: 'x86',   os.version: '5.1', java.version: '1.7.0_45'
Session ID: 6eebd4ca-d637-45fa-91e3-c5f18d1d3568
Driver info: org.openqa.selenium.firefox.FirefoxDriver
Capabilities [{platform=XP, acceptSslCerts=true, javascriptEnabled=true,  cssSelectorsEnabled=true, databaseEnabled=true, browserName=firefox, handlesAlerts=true,  browserConnectionEnabled=true, webStorageEnabled=true, nativeEvents=false, rotatable=false,  locationContextEnabled=true, applicationCacheEnabled=true, takesScreenshot=true, version=29.0.1}]
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:193)
at org.openqa.selenium.remote.ErrorHandler.throwIfResponseFailed(ErrorHandler.java:145)
at org.openqa.selenium.remote.RemoteWebDriver.execute(RemoteWebDriver.java:554)
at org.openqa.selenium.remote.RemoteWebElement.execute(RemoteWebElement.java:268)
at org.openqa.selenium.remote.RemoteWebElement.click(RemoteWebElement.java:79)
at com.selenium.Monster.main(Monster.java:24)
 Caused by: org.openqa.selenium.remote.ErrorHandler$UnknownServerException: Element is not  currently visible and so may not be interacted with
Build info: version: '2.39.0', revision: 'ff23eac', time: '2013-12-16 16:12:12'
System info: host: 'omega-d52b83806', ip: '10.0.0.5', os.name: 'Windows XP', os.arch: 'x86', os.version: '5.1', java.version: '1.7.0_45'
Driver info: driver.version: unknown
at <anonymous class>.fxdriver.preconditions.visible(file:///C:/DOCUME~1/OMEGA/LOCALS~1/Temp/anonymous580265852301620722webdriver-profile/extensions/fxdriver@googlecode.com/components/command_processor.js:8179)
at <anonymous class>.DelayedCommand.prototype.checkPreconditions_(file:///C:/DOCUME~1/OMEGA/LOCALS~1/Temp/anonymous580265852301620722webdriver-profile/extensions/fxdriver@googlecode.com/components/command_processor.js:10814)
at <anonymous class>.DelayedCommand.prototype.executeInternal_/h(file:///C:/DOCUME~1/OMEGA/LOCALS~1/Temp/anonymous580265852301620722webdriver-profile/extensions/fxdriver@googlecode.com/components/command_processor.js:10831)
at <anonymous class>.DelayedCommand.prototype.executeInternal_(file:///C:/DOCUME~1/OMEGA/LOCALS~1/Temp/anonymous580265852301620722webdriver-profile/extensions/fxdriver@googlecode.com/components/command_processor.js:10836)
at <anonymous class>.DelayedCommand.prototype.execute/<(file:///C:/DOCUME~1/OMEGA/LOCALS~1/Temp/anonymous580265852301620722webdriver-profile/extensions/fxdriver@googlecode.com/components/command_processor.js:10778)
Exception in thread "main" org.openqa.selenium.ElementNotVisibleException: Element is not  currently visible and so may not be interacted with
Command duration or timeout: 31 milliseconds
Build info: version: '2.39.0', revision: 'ff23eac', time: '2013-12-16 16:12:12'
System info: host: 'omega-d52b83806', ip: '10.0.0.5', os.name: 'Windows XP', os.arch: 'x86',  os.version: '5.1', java.version: '1.7.0_45'
Session ID: 6eebd4ca-d637-45fa-91e3-c5f18d1d3568
Driver info: org.openqa.selenium.firefox.FirefoxDriver
Capabilities [{platform=XP, acceptSslCerts=true, javascriptEnabled=true, cssSelectorsEnabled=true, databaseEnabled=true, browserName=firefox, handlesAlerts=true, browserConnectionEnabled=true, webStorageEnabled=true, nativeEvents=false, rotatable=false, locationContextEnabled=true, applicationCacheEnabled=true, takesScreenshot=true, version=29.0.1}]
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:193)
at org.openqa.selenium.remote.ErrorHandler.throwIfResponseFailed(ErrorHandler.java:145)
at org.openqa.selenium.remote.RemoteWebDriver.execute(RemoteWebDriver.java:554)
at org.openqa.selenium.remote.RemoteWebElement.execute(RemoteWebElement.java:268)
at org.openqa.selenium.remote.RemoteWebElement.click(RemoteWebElement.java:79)
at com.selenium.Monster.main(Monster.java:33)
 Caused by: org.openqa.selenium.remote.ErrorHandler$UnknownServerException: Element is not currently visible and so may not be interacted with
 Build info: version: '2.39.0', revision: 'ff23eac', time: '2013-12-16 16:12:12'
 System info: host: 'omega-d52b83806', ip: '10.0.0.5', os.name: 'Windows XP', os.arch: 'x86', os.version: '5.1', java.version: '1.7.0_45'
 Driver info: driver.version: unknown
at <anonymous class>.fxdriver.preconditions.visible(file:///C:/DOCUME~1/OMEGA/LOCALS~1/Temp/anonymous580265852301620722webdriver-profile/extensions/fxdriver@googlecode.com/components/command_processor.js:8179)
at <anonymous class>.DelayedCommand.prototype.checkPreconditions_(file:///C:/DOCUME~1/OMEGA/LOCALS~1/Temp/anonymous580265852301620722webdriver-profile/extensions/fxdriver@googlecode.com/components/command_processor.js:10814)
at <anonymous class>.DelayedCommand.prototype.executeInternal_/h(file:///C:/DOCUME~1/OMEGA/LOCALS~1/Temp/anonymous580265852301620722webdriver-profile/extensions/fxdriver@googlecode.com/components/command_processor.js:10831)
at <anonymous class>.DelayedCommand.prototype.executeInternal_(file:///C:/DOCUME~1/OMEGA/LOCALS~1/Temp/anonymous580265852301620722webdriver-profile/extensions/fxdriver@googlecode.com/components/command_processor.js:10836)
at <anonymous class>.DelayedCommand.prototype.execute/<(file:///C:/DOCUME~1/OMEGA/LOCALS~1/Temp/anonymous580265852301620722webdriver-profile/extensions/fxdriver@googlecode.com/components/command_processor.js:10778)

这是我从代码中得到的完整异常。虽然我能够使用我在程序中使用的 xpath 找到所有元素。在包含 Alt=window.switchTo().alert(); 之前，代码工作正常，但将它们放入代码中后，我收到了这些异常。

Answer 1

您需要处理您的代码。需要进行以下更改才能使其正常工作:

首先:- 将以下内容替换为以下代码片段，这解决了您的第一个异常。当您使用以下 xpath 定位时，该页面包含多个元素。它对于您想要使用的应该是唯一的。

window.findElement(By.xpath("//img[@src='http://media.monsterindia.com/monster_2012/trans.gif']")).click();

替换为:-

window.findElement(By.xpath("//div[@id='main_resume']//div//a[6]")).click();

第二:- 删除警报。警报在页面中。请替换以下内容

Alert alt=window.switchTo().alert();
System.out.println("Massage from alert is "+alt.getText());

你完全可以将其更改为:

window.findElement(By.xpath("//input[@value='Ok']")).click();

请务必使用wait而不是Thread.sleep()。

希望这能解决您的问题。