我是新来的htmlunit(2.23),我不能得到这个测试的工作: 我得到这个ClassCastException抛出HtmlUnit,我不知道这是一个错误,或者如果我在做有问题。这个ClassCastException是一个HtmlUnit错误吗?
java.lang.ClassCastException:com.gargoylesoftware.htmlunit.TextPage不能在com.gargoylesoftware.htmlunit.WebClient.makeWebResponseForJavaScriptUrl被强制转换为com.gargoylesoftware.htmlunit.html.HtmlPage (WebClient.java:1241) (WebClient.getPage(WebClient.getPage))。 java:451) at com.gargoylesoftware.htmlunit.WebClient.getPage(WebClient.java:436) at org.wyttenbach.dale.mlec.OutageTest.test(OutageTest.java:46) ...
代码
import java.awt.Desktop;
import java.io.IOException;
import java.net.MalformedURLException;
import java.net.URI;
import java.util.ArrayList;
import java.util.Collection;
import java.util.HashMap;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;
import org.junit.Assert;
import org.junit.Test;
import com.gargoylesoftware.htmlunit.FailingHttpStatusCodeException;
import com.gargoylesoftware.htmlunit.JavaScriptPage;
import com.gargoylesoftware.htmlunit.NicelyResynchronizingAjaxController;
import com.gargoylesoftware.htmlunit.Page;
import com.gargoylesoftware.htmlunit.TextPage;
import com.gargoylesoftware.htmlunit.WebClient;
import com.gargoylesoftware.htmlunit.html.DomElement;
import com.gargoylesoftware.htmlunit.html.HtmlPage;
public class OutageTest {
private static final String SITE_URL = "https://ebill.mlecmn.net/woViewer/";
private static final String OUTAGE_MAP_URL = SITE_URL + "mapviewer.html?config=Outage+Web+Map";
@Test
public void test() throws FailingHttpStatusCodeException, MalformedURLException, IOException {
try (final WebClient webClient = new WebClient()) {
webClient.waitForBackgroundJavaScript(20000);
webClient.setAjaxController(new NicelyResynchronizingAjaxController());
webClient.getOptions().setUseInsecureSSL(true);
Map<String, Page> urls = new HashMap<String, Page>();
LinkedList<String> urlsToVisit = new LinkedList<String>();
urlsToVisit.add(OUTAGE_MAP_URL);
while (!urlsToVisit.isEmpty()) {
String url = urlsToVisit.remove();
if (urls.containsKey(url)) {
continue;
}
Page page = webClient.getPage(url);
urls.put(url, page);
if (page instanceof HtmlPage) {
HtmlPage page2 = (HtmlPage) page;
System.err.println("================================================================");
System.err.println(page2.asXml());
System.err.println("================================================================");
Assert.assertFalse("Outage in Nordland township: " + url, page2.asText().contains("Nordland"));
urlsToVisit.addAll(extractLinks(page2));
} else if (page instanceof JavaScriptPage) {
JavaScriptPage page2 = (JavaScriptPage) page;
Assert.assertFalse("Outage in Nordland township: " + url, page2.getContent().contains("Nordland"));
} else if (page instanceof TextPage) {
TextPage page2 = (TextPage) page;
Assert.assertFalse("Outage in Nordland township: " + url, page2.getContent().contains("Nordland"));
} else {
System.err.println(String.format("%s => %s", url, page.getClass().getName()));
}
}
} catch (AssertionError e) {
reportOutage();
throw e;
}
}
private Collection<String> extractLinks(HtmlPage page) {
List<String> links = new ArrayList<String>();
for (DomElement x : page.getElementsByTagName("script")) {
String src = x.getAttribute("src");
if (!src.contains(":")) {
src = SITE_URL + src;
System.err.println("script src="+src);
}
links.add(src);
}
for (DomElement x : page.getElementsByTagName("link")) {
String href = x.getAttribute("href");
if (!href.contains(":")) {
href = SITE_URL + href;
System.err.println("link href="+href);
}
links.add(href);
}
// Causes ClassCastException com.gargoylesoftware.htmlunit.TextPage cannot be cast to com.gargoylesoftware.htmlunit.html.HtmlPage
//at com.gargoylesoftware.htmlunit.WebClient.makeWebResponseForJavaScriptUrl(WebClient.java:1241)
for (DomElement x : page.getElementsByTagName("iframe")) {
String src = x.getAttribute("src");
if (!src.contains(":")) {
src = SITE_URL + src;
System.err.println("iframe src="+src);
}
links.add(src);
}
return links;
}
private void reportOutage() {
try {
Desktop.getDesktop().browse(new URI(OUTAGE_MAP_URL));
} catch (Exception e) {
e.printStackTrace();
}
}
}
咦?当然,如果你有一个异常,你的代码不工作。请澄清。 – OldProgrammer
考虑创建一个[_Minimal_,Complete,Verifiable Example](http://stackoverflow.com/help/mcve)。 – qxz
其意图是,如果在网页或其链接页面的任何位置发现单词“Nordland”,则测试应该失败...但我不太了解如何使用htmlunit知道如何正确实施extractLinks方法,或者如果这甚至是可能的。而且我相当肯定我并没有详尽地搜索所有的链接,而例外就是这样的一个障碍。 – wytten