selenium 加载jquery

packagecom.example.tests;

import staticorg.junit.Assert.*;
importjava.util.*;
importorg.junit.*;
importorg.openqa.selenium.*;
importorg.openqa.selenium.ie.InternetExplorerDriver;

public classSelenium2{
    WebDriver driver = newInternetExplorerDriver();
    JavascriptExecutor jse = (JavascriptExecutor) driver;

    @Test
    public voidjQueryTest() {
        driver.get("http://www.baidu.com/");
        injectjQueryIfNeeded();
        
        List<WebElement> elements = (List<WebElement>) jse.executeScript("return jQuery.find('#nv a')");
        
        assertEquals(7, elements.size()); // 验证超链接的数量
        for (inti = 0; i < elements.size(); i++) {
            System.out.print(elements.get(i).getText() + "、");
        }
        
        driver.close();
    }
    
    private voidinjectjQueryIfNeeded() {
        if(!jQueryLoaded())
            injectjQuery();
    }

    // 判断是已加载jQuery
    publicBoolean jQueryLoaded() {
        Boolean loaded;
        try{
            loaded = (Boolean) jse.executeScript("return "+ "jQuery()!=null");
        } catch(WebDriverException e) {
            loaded = false;
        }
        returnloaded;
    }

    // 通过注入jQuery
    public voidinjectjQuery() {
        jse.executeScript(" var headID = "
                + "document.getElementsByTagName("head")[0];"
                + "var newScript = document.createElement('script');"
                + "newScript.type = 'text/javascript';" + "newScript.src = "
                + "'http://ajax.googleapis.com/ajax/"
                + "libs/jquery/1.7.2/jquery.min.js';"
                + "headID.appendChild(newScript);");
    }
}