package org.melati;
   
   import java.io.File;
   import java.io.FileInputStream;
   import java.io.FileOutputStream;
   
   import org.mortbay.jetty.Server;
   import org.mortbay.jetty.webapp.WebAppContext;
   import org.mortbay.resource.FileResource;
  
  import net.sourceforge.jwebunit.junit.WebTestCase;
  
  /**
   *
   * Much thanks to 
   * http://today.java.net/pub/a/today/2007/04/12/embedded-integration-testing-of-web-applications.html
   * 
   * @author timp
   * @since 2008/01/01
   * 
   */
  public class JettyWebTestCase extends WebTestCase {
  
    private static Server server;
    private static boolean started = false;
    // manually keep in synch with MelatiConfig.properties
    protected static String contextName = "";
    protected static String webAppDirName = "src/test/webapp";
    protected static String referenceOutputDir = "src/test/resources";
  
    protected static int actualPort;  
    /**
     * 
     * Default constructor.
     */
    public JettyWebTestCase() {
      super();
    }
  
    /**
     * Constructor, with name.
     * @param name
     */
    public JettyWebTestCase(String name) {
      super(name);
    }
  
    protected void setUp() throws Exception {
      // Port 0 means "assign arbitrarily port number"
      actualPort = startServer(0);
      getTestContext().setBaseUrl("http://localhost:" + actualPort + "/" );
    }
  
    protected void tearDown() throws Exception {
      super.tearDown();
    }
    
    /**
     * If you don't know by now.
     * @param args
     * @throws Exception
     */
    public static void main(String[] args) throws Exception {
      actualPort = startServer(8080);
    }
  
    protected static int startServer(int port) throws Exception {
      
      if (!started) { 
        server = new Server(port);
        WebAppContext wac = new WebAppContext(
                getWebAppDirName(), "/" + getContextName());
        FileResource.setCheckAliases(false); 
        server.addHandler(wac);
        server.start();
        wac.dumpUrl();
        started = true;
      }
      // getLocalPort returns the port that was actually assigned
      return server.getConnectors()[0].getLocalPort();
      
    }
    
    protected int getActualPort() { 
      return actualPort;
    }
    
    /**
     * Just to say hello.
     */
    public void testIndex() {
      beginAt("/");
      assertTextPresent("Hello World!");
    }
    
     /**
     * {@inheritDoc}
     * @see net.sourceforge.jwebunit.junit.WebTestCase#beginAt(java.lang.String)
     */
   public void beginAt(String url) { 
     super.beginAt(contextUrl(url));
   }
   /**
    * {@inheritDoc}
    * @see net.sourceforge.jwebunit.junit.WebTestCase#gotoPage(java.lang.String)
    */
   public void gotoPage(String url) { 
     System.err.println(contextUrl(url));
     super.gotoPage(contextUrl(url));
   }
   protected String contextUrl(String url) { 
     return "/" + getContextName()  + url;
   }
 
   /**
    * @return the contextName
    */
   public static String getContextName() {
     return contextName;
   }
   
   /**
    * @return relative path of webapp dir
    */
   public static String getWebAppDirName() {
     return webAppDirName;
   }
 
   /**
    * @param contextName the contextName to set
    */
   protected static void setContextName(String contextName) {
     JettyWebTestCase.contextName = contextName;
   }
 
   /**
    * @param webAppDirName the webAppDirName to set
    */
   protected static void setWebAppDirName(String webAppDirName) {
     JettyWebTestCase.webAppDirName = webAppDirName;
   }
 
   private boolean generateCached() { 
     return false;
   }
   protected void assertPageEqual(String url, String fileName) throws Exception { 
     beginAt(url);
     String generated = getTester().getPageSource();
     File referenceFile = new File(referenceOutputDir, fileName);
     if (referenceFile.exists() && ! generateCached()) {
       FileInputStream file = new FileInputStream (referenceFile);
       byte[] b = new byte[file.available()];
       file.read(b);
       file.close ();
       String cached = new String(b);
       assertEquals(cached, generated);
     } else { 
       FileOutputStream file = new FileOutputStream(referenceFile);
       file.write(generated.getBytes());
       file.close();
       fail("Reference output file generated: " + referenceFile.getCanonicalPath() + " modify generateCached and rerun");
     }
   }
   
 }