无法在Selenium中使用xpath/css定位器查找元素

Question

我正在使用树视图类型的文件夹结构。请找代码如下：

代码：

package Selenium_Practice; 

import java.util.concurrent.TimeUnit; 

import org.openqa.selenium.By; 
import org.openqa.selenium.WebDriver; 
import org.openqa.selenium.WebElement; 
import org.openqa.selenium.firefox.FirefoxDriver; 
import org.openqa.selenium.support.ui.ExpectedConditions; 
import org.openqa.selenium.support.ui.WebDriverWait; 

public class Folder_Navigation { 

    public static void main(String[] args) { 

     System.setProperty("webdriver.gecko.driver", "C:\\Selenium\\Selenium_Practice\\EXEs\\geckodriver-v0.10.0-win64\\geckodriver.exe"); 

     WebDriver driver = new FirefoxDriver(); 

     driver.get("http://alfrescocontint:8080/alfresco"); 

     driver.manage().window().maximize(); 

     WebDriverWait wait = new WebDriverWait(driver,30); 

     wait.until(ExpectedConditions.elementToBeClickable(By.id("loginForm:submit"))); 

     driver.findElement(By.id("loginForm:user-name")).clear(); 
     driver.findElement(By.id("loginForm:user-name")).sendKeys("admin"); 

     driver.findElement(By.id("loginForm:user-password")).clear(); 
     driver.findElement(By.id("loginForm:user-password")).sendKeys("admin"); 

     driver.findElement(By.id("loginForm:submit")).click(); 

     driver.manage().timeouts().implicitlyWait(30, TimeUnit.SECONDS); 

     driver.findElement(By.xpath("//div[@id='navigator']/div[2]/a")).click(); 

     driver.findElement(By.cssSelector("img[id='ygtvt26']")).click(); 

     driver.findElement(By.cssSelector("img[id='ygtvt30']")).click(); 

     driver.findElement(By.cssSelector("img[id='ygtvt32']")).click(); 

     driver.findElement(By.cssSelector("img[id='ygtvt33']")).click(); 

     driver.findElement(By.xpath("//*[@id='ygtvcontentel38']/span")).click(); 
    } 

} 

代码片段：

<div id="ygtv32" class="ygtvitem"> 
<div class="treeNode" style="margin-left: 14px;"> 
<table cellspacing="0" cellpadding="0" border="0"> 
<tbody> 
<tr> 
<td> 
<img id="ygtvt32" class="ygtvtp" src="/alfresco/images/icons/arrow_open.gif" onclick="javascript:YAHOO.widget.TreeView.getNode('treeContainer',32).toggle()"/> 
</td> 
<td onclick="treeNodeSelected("workspace://SpacesStore/20fdf23c-50ed-4e8f-9af8-262c35c80dde");"> 
<td id="ygtvcontentel32" onclick="treeNodeSelected("workspace://SpacesStore/20fdf23c-50ed-4e8f-9af8-262c35c80dde");"> 
</tr> 
</tbody> 
</table> 
</div> 
<div id="ygtvc32" class="ygtvchildren" style=""> 
</div> 

错误：

1470997671795 Marionette: Element is missing an accesible name -> id: loginForm:user-name, tagName: INPUT, className: 
1470997671848 Marionette: Element does not have a correct accessibility role and may not be manipulated via the accessibility API -> id: loginForm:user- password, tagName: INPUT, className: 
JavaScript warning: https://normandy.cdn.mozilla.net/static/bundles/selfrepair-72948156b77d6ce320e0.1e946d807ad4.js, line 11001: mutating the [[Prototype]] of an object will cause your code to run very slowly; instead create the object with the correct initial [[Prototype]] value using Object.create 
1470997678274 Marionette: Element does not have a correct accessibility role and may not be manipulated via the accessibility API -> id: ygtvt26, tagName: IMG,  className: ygtvtn 
1470997678426 Marionette: Element does not have a correct accessibility role and may not be manipulated via the accessibility API -> id: ygtvt30, tagName: IMG,  className: ygtvtp 
Exception in thread "main" org.openqa.selenium.NoSuchElementException: Unable to locate element: img[id='ygtvt32'] (WARNING: The server did not provide any  stacktrace information) 
Command duration or timeout: 30.08 seconds 
For documentation on this error, please visit: http://seleniumhq.org/exceptions/no_such_element.html 
Build info: version: 'unknown', revision: '2aa21c1', time: '2016-08-02 14:59:43 -0700' 
System info: host: 'LON-EKNATHDVM', ip: '10.63.23.191', os.name: 'Windows 7', os.arch: 'amd64', os.version: '6.1', java.version: '1.8.0_102' 
Driver info: org.openqa.selenium.firefox.FirefoxDriver 
Capabilities [{rotatable=false, raisesAccessibilityExceptions=false, appBuildId=20160407164938, version=, platform=XP, proxy={}, specificationLevel=1, acceptSslCerts=false, browserVersion=45.0.2, platformVersion=6.1, XULappId={ec8030f7-c20a-464f-9b0e-13a3a9e97384}, browserName=Firefox, takesScreenshot=true, takesElementScreenshot=true, platformName=Windows_NT, device=desktop}] 
Session ID: 70dd0528-45e4-4492-b607-695f45ab0d3a 
*** Element info: {Using=css selector, value=img[id='ygtvt32']} 
    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:206) 
    at org.openqa.selenium.remote.ErrorHandler.throwIfResponseFailed(ErrorHandler.java:158) 
    at org.openqa.selenium.remote.RemoteWebDriver.execute(RemoteWebDriver.java:683) 
    at org.openqa.selenium.remote.RemoteWebDriver.findElement(RemoteWebDriver.java:377) 
    at org.openqa.selenium.remote.RemoteWebDriver.findElementByCssSelector(RemoteWebDriver.java:498) 
    at org.openqa.selenium.By$ByCssSelector.findElement(By.java:430) 
    at org.openqa.selenium.remote.RemoteWebDriver.findElement(RemoteWebDriver.java:369) 
    at Selenium_Practice.Folder_Navigation.main(Folder_Navigation.java:45) 

IMG ID保持失效，这是使脚本更改。请注意，由于其他应用程序中的数据创建，这些文件夹会动态创建。

请提供技术在每次迭代过程中成功识别元素。

Answer 1

我会尽力夫妇的解决方案在这种情况下

1. 使用FF webdriver的元素定位 https://addons.mozilla.org/en-US/firefox/addon/element-locator-for-webdriv/

2. 记录步/ s的硒IDE和来自找出元素标识符。

希望这些帮助。

Answer 2

它看起来像你试图点击页面上所有的“树节点”的，所以你可以尝试这样的事情，在这里您可以通过自己的曾祖的div会发现所有的节点：

List<WebElement> ygtvitems = enhancePreviewPage.getDriver().findElements(new By.ByCssSelector("div.ygtvitem")); 
    for (WebElement treeNode : ygtvitems) { 
     treeNode.click(); 
    }