无法在Selenium中找到元素（htmlUnitDriver）

Question

我无法找到硒中的元素，我使用htmlUnitDriver。井司机工作正常，但我无法找到谷歌搜索文本框元素。

下面是代码：

import java.util.concurrent.TimeUnit; 
import org.openqa.selenium.By; 
import org.openqa.selenium.WebElement; 
import org.openqa.selenium.htmlunit.HtmlUnitDriver; 

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

      HtmlUnitDriver unitDriver = new HtmlUnitDriver(); 
      unitDriver.manage().timeouts().implicitlyWait(10, TimeUnit.SECONDS); 
      unitDriver.get("http://google.com"); 
      System.out.println("Title of the page is -> " + unitDriver.getTitle()); 

      WebElement searchBox = unitDriver.findElement(By.xpath(".//*[@id='gs_htif0']")); 
      searchBox.sendKeys("Selenium"); 
      WebElement button = unitDriver.findElement(By.name("gbqfba")); 
      button.click(); 
      System.out.println("Title of the page is -> " + unitDriver.getTitle()); 


    } 
} 

下面是一个错误：

Exception in thread "main" org.openqa.selenium.NoSuchElementException: Unable to locate a node using .//*[@id='gs_htif0'] For documentation on this error, please visit: http://seleniumhq.org/exceptions/no_such_element.html Build info: version: '2.53.0', revision: '35ae25b1534ae328c771e0856c93e187490ca824', time: '2016-03-15 10:43:46' System info: host: 'user-PC', ip: '192.168.1.52', os.name: 'Windows 7', os.arch: 'amd64', os.version: '6.1', java.version: '1.8.0_51' Driver info: driver.version: SampleUnitDriver at org.openqa.selenium.htmlunit.HtmlUnitDriver.findElementByXPath(HtmlUnitDriver.java:1165) at org.openqa.selenium.By$ByXPath.findElement(By.java:361) at org.openqa.selenium.htmlunit.HtmlUnitDriver$5.call(HtmlUnitDriver.java:1725) at org.openqa.selenium.htmlunit.HtmlUnitDriver$5.call(HtmlUnitDriver.java:1721) at org.openqa.selenium.htmlunit.HtmlUnitDriver.implicitlyWaitFor(HtmlUnitDriver.java:1367) at org.openqa.selenium.htmlunit.HtmlUnitDriver.findElement(HtmlUnitDriver.java:1721) at org.openqa.selenium.htmlunit.HtmlUnitDriver.findElement(HtmlUnitDriver.java:606) at com.digitalmqc.automation.action.SampleUnitDriver.main(SampleUnitDriver.java:19)

任何帮助可以理解的。

Answer 1

你是定位错误的元素，你应该尝试如下： -

HtmlUnitDriver unitDriver = new HtmlUnitDriver(); 

unitDriver.manage().timeouts().implicitlyWait(10, TimeUnit.SECONDS); 
unitDriver.get("http://google.com"); 
System.out.println("Title of the page is -> " + unitDriver.getTitle()); 

WebElement searchBox = unitDriver.findElement(By.name("q")) 
searchBox.sendKeys("Selenium"); 
WebElement button = unitDriver.findElement(By.name("btnG")); 
button.click(); 
System.out.println("Title of the page is -> " + unitDriver.getTitle()); 

希望它能帮助.. :)

Answer 2

找到元素之前添加一些明确的等待：

WebDriverWait wait = new WebDriverWait(driver, 10); 
WebElement searchBox = wait.until(ExpectedConditions.elementToBeClickable(By.xpath(".//*[@id='gs_htif0']")))); 
searchBox.sendKeys("Selenium");