我的目的是执行无头浏览以实现测试自动化。我在Java中使用Selenium Webdriver。

现在,问题是脚本可以在Firefox浏览器中正常运行,但不能在HtmlUnitDriver中运行。

请指导我我犯错的地方。

public class Headless
{
    public static void main(String[] args) throws InterruptedException
    {
        WebDriver driver = new HtmlUnitDriver();
        //WebDriver driver=new FirefoxDriver();

// Navigate to Google
        driver.get("https://www.google.co.in/?gfe_rd=cr&ei=k36cVsa6OubI8Aec14bICQ&gws_rd=ssl");
        //Thread.sleep(14000);


        WebDriverWait wait=new WebDriverWait(driver,10);
        wait.until(ExpectedConditions.presenceOfElementLocated(By.id("sb_ifc0")));



        System.out.println("URL= "+driver.getCurrentUrl());
        // Locate the searchbox using its name
        WebElement element = driver.findElement(By.id("sb_ifc0"));

       // Enter a search query
       element.sendKeys("Guru99");

       // Submit the query. Webdriver searches for the form using the text input element automatically
       // No need to locate/find the submit button
       element.submit();

       // This code will print the page title
       System.out.println("Page title is: " + driver.getTitle());


如果是HtmlUnitDriver,则会发生错误:

    Exception in thread "main" java.lang.NoClassDefFoundError: com/gargoylesoftware/htmlunit/javascript/host/Event
    at org.openqa.selenium.htmlunit.HtmlUnitDriver.resetKeyboardAndMouseState(HtmlUnitDriver.java:513)
    at org.openqa.selenium.htmlunit.HtmlUnitDriver.get(HtmlUnitDriver.java:509)
    at org.openqa.selenium.htmlunit.HtmlUnitDriver.get(HtmlUnitDriver.java:469)
    at org.openqa.selenium.htmlunit.HtmlUnitDriver.<init>(HtmlUnitDriver.java:185)
    at org.openqa.selenium.htmlunit.HtmlUnitDriver.<init>(HtmlUnitDriver.java:195)
    at org.openqa.selenium.htmlunit.HtmlUnitDriver.<init>(HtmlUnitDriver.java:191)
    at com.se.ecoreal.selenium.Headless.main(Headless.java:15)
Caused by: java.lang.ClassNotFoundException: com.gargoylesoftware.htmlunit.javascript.host.Event
    at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
    at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
    ... 7 more

最佳答案

这是行不通的,因为HtmlUnitDriver默认情况下禁用了javascript。检查默认的构造函数代码:

  public HtmlUnitDriver() {
    this(false);
  }
  public HtmlUnitDriver(boolean enableJavascript) {
    this(BrowserVersion.getDefault(), enableJavascript);
  }


如果启用javascript,您的示例对我有用:

 WebDriver driver = new HtmlUnitDriver(BrowserVersion.FIREFOX_38, true);


编辑(已编辑问题的答案):
NoClassDefFoundError是由缺少(或版本错误)依赖项引起的。如果使用的是maven或gradle,请检查项目是否存在依赖项冲突。如果不使用依赖项管理,请确保包含所有HtmlUnit依赖项。

09-16 10:13