/*
    * Licensed to the Apache Software Foundation (ASF) under one
    * or more contributor license agreements.  See the NOTICE file
    * distributed with this work for additional information
    * regarding copyright ownership.  The ASF licenses this file
    * to you under the Apache License, Version 2.0 (the
    * "License"); you may not use this file except in compliance
    * with the License.  You may obtain a copy of the License at
    *
   *   http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing,
   * software distributed under the License is distributed on an
   * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
   * KIND, either express or implied.  See the License for the
   * specific language governing permissions and limitations
   * under the License.
   */
  package org.apache.maven.doxia.siterenderer;
  
  import java.io.File;
  import java.util.ArrayList;
  import java.util.Collections;
  import java.util.Iterator;
  import java.util.List;
  
  import org.htmlunit.CollectingAlertHandler;
  import org.htmlunit.WebClient;
  import org.htmlunit.html.HtmlAnchor;
  import org.htmlunit.html.HtmlElement;
  import org.htmlunit.html.HtmlHeading1;
  import org.htmlunit.html.HtmlMain;
  import org.htmlunit.html.HtmlPage;
  import org.htmlunit.html.HtmlParagraph;
  import org.htmlunit.html.HtmlScript;
  import org.htmlunit.html.HtmlSection;
  
  import static org.codehaus.plexus.testing.PlexusExtension.getTestFile;
  import static org.junit.jupiter.api.Assertions.assertEquals;
  import static org.junit.jupiter.api.Assertions.assertNotNull;
  import static org.junit.jupiter.api.Assertions.assertTrue;
  
  /**
   * Verify javascript code.
   *
   * @author ltheussl
   */
  public class JavascriptVerifier extends AbstractVerifier {
      /**
       * Verifies a HtmlPage.
       *
       * @param file the file to verify.
       *
       * @throws Exception if something goes wrong.
       */
      public void verify(String file) throws Exception {
          File jsTest = getTestFile("target/output/javascript.html");
          assertNotNull(jsTest);
          assertTrue(jsTest.exists());
  
          // HtmlUnit
          try (WebClient webClient = new WebClient()) {
              webClient.getOptions().setCssEnabled(false);
  
              final List<String> collectedAlerts = new ArrayList<>(4);
              webClient.setAlertHandler(new CollectingAlertHandler(collectedAlerts));
  
              HtmlPage page = (HtmlPage) webClient.getPage(jsTest.toURI().toURL());
              assertNotNull(page);
  
              HtmlElement element = page.getHtmlElementById("contentBox");
              assertNotNull(element);
              HtmlMain main = (HtmlMain) element;
              assertNotNull(main);
  
              Iterator<HtmlElement> elementIterator =
                      main.getHtmlElementDescendants().iterator();
  
              // ----------------------------------------------------------------------
              //
              // ----------------------------------------------------------------------
  
              HtmlSection section = (HtmlSection) elementIterator.next();
              assertNotNull(section);
  
              HtmlAnchor anchor = (HtmlAnchor) elementIterator.next();
              assertNotNull(anchor);
              assertEquals("Test", anchor.getAttribute("id"));
              HtmlHeading1 h1 = (HtmlHeading1) elementIterator.next();
              assertNotNull(h1);
              assertEquals("Test", h1.asNormalizedText().trim());
  
              HtmlParagraph p = (HtmlParagraph) elementIterator.next();
              assertNotNull(p);
              assertEquals(
                      "You should see a JavaScript alert...", p.asNormalizedText().trim());
  
              HtmlScript script = (HtmlScript) elementIterator.next();
              assertNotNull(script);
             assertEquals("text/javascript", script.getAttribute("type"));
             assertEquals("", script.asNormalizedText().trim());
             List<String> expectedAlerts = Collections.singletonList("Hello!");
             assertEquals(expectedAlerts, collectedAlerts);
         }
     }
 }