用HtmlUnit等待Javascript

Question

前几天我正在试验HtmlUnit。我编写了一个程序来执行对站点的登录并收集一些信息。但是当单击特定按钮时，htmlUnit不会等待生成的操作。我试图等到JavascriptJobManager中的所有作业都完成但是它被卡在大约15个作业中。之后我试着等到最终的htmlpage改变，但这也不起作用。我接下来可以尝试什么？感谢您的时间，我会尽快实施任何建议。

编辑：我完全知道facebook不喜欢webcrawling，但我只是为了学习目的这样做，所以没有伤害。在错误消息之后，程序抛出。 http://www.pastebin.ca/3007578

单击infoButton时，会出现一个新窗口，使旧窗口无法访问。 http://imgur.com/aiF7nJR

final static WebClient webClient = new WebClient(BrowserVersion.FIREFOX_31); 
public static void main(String [] args) throws FailingHttpStatusCodeException, MalformedURLException, IOException, InterruptedException{
    //init webclient
    webClient.setAjaxController(new NicelyResynchronizingAjaxController());
    webClient.getOptions().setRedirectEnabled(true);
    webClient.getOptions().setJavaScriptEnabled(true);
    webClient.getCookieManager().setCookiesEnabled(true);
    webClient.getOptions().setThrowExceptionOnScriptError(true);
    webClient.getOptions().setCssEnabled(true);
    webClient.getOptions().setUseInsecureSSL(true);
    webClient.getOptions().setThrowExceptionOnFailingStatusCode(false);
    webClient.waitForBackgroundJavaScript(12000);
    webClient.setAlertHandler(new AlertHandler() {

        @Override
        public void handleAlert(Page arg0, String arg1) {
            System.out.println("ALERT ON "+arg0.getUrl()+"  :"+ arg1);
        }
    });

    // perform the login
    final HtmlPage loginPage = webClient.getPage("https://facebook.com"); 
    final HtmlForm form = loginPage.getForms().get(0);
    final HtmlTextInput username = form.getInputByName("email");
    final HtmlPasswordInput password = form.getInputByName("pass");
    final HtmlElement button = (HtmlElement) loginPage.getElementById("u_0_l");
    username.setText("Your email");
    password.setText("Your password");
    final HtmlPage frontPage = (HtmlPage) button.click();

    // The actual problem
    final HtmlPage testPage = webClient.getPage("https://www.facebook.com/pages/Stackoverflow/1462865420609264");
    HtmlElement infoButton = testPage.getFirstByXPath("//*[@class='share_action_link']"); // First share button.

    HtmlPage testPage2 = infoButton.click();

    JavaScriptJobManager manager = testPage2.getEnclosingWindow().getJobManager();
    while (manager.getJobCount() > 0) {
        Thread.sleep(1000);
        webClient.waitForBackgroundJavaScript(100);
        System.out.println(manager.getEarliestJob());
    }

    while(testPage == testPage2){
        System.out.println("failed");
        webClient.waitForBackgroundJavaScript(100);
        Thread.sleep(5 * 1000);
    }
}