backgroundimageextractionselftestcase.java

最强的爬虫工程

/* BackgroundImageExtractionSelfTest
 *
 * Created on Jan 29, 2004
 *
 * Copyright (C) 2004 Internet Archive.
 *
 * This file is part of the Heritrix web crawler (crawler.archive.org).
 *
 * Heritrix is free software; you can redistribute it and/or modify
 * it under the terms of the GNU Lesser Public License as published by
 * the Free Software Foundation; either version 2.1 of the License, or
 * any later version.
 *
 * Heritrix is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Lesser Public License for more details.
 *
 * You should have received a copy of the GNU Lesser Public License
 * along with Heritrix; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */
package org.archive.crawler.selftest;


import java.io.File;
import java.util.Iterator;
import java.util.List;

import org.archive.io.arc.ARCRecordMetaData;


/**
 * Test the crawler can find background images in pages.
 *
 * @author stack
 * @version $Id: BackgroundImageExtractionSelfTestCase.java,v 1.5 2006/08/16 00:46:46 stack-sf Exp $
 */
public class BackgroundImageExtractionSelfTestCase
    extends SelfTestCase
{
    /**
     * The name of the background image the crawler is supposed to find.
     */
    private static final String IMAGE_NAME = "example-background-image.jpeg";

    private static final String JPEG = "image/jpeg";


    /**
     * Read ARC file for the background image the file that contained it.
     *
     * Look that there is only one instance of the background image in the
     * ARC and that it is of the same size as the image in the webapp dir.
     */
    public void testBackgroundImageExtraction()
    {
        String relativePath = getTestName() + '/' + IMAGE_NAME;
        String url = getSelftestURLWithTrailingSlash() + relativePath;
        File image = new File(getHtdocs(), relativePath);
        assertTrue("Image exists", image.exists());
        List [] metaDatas = getMetaDatas();
        boolean found = false;
        ARCRecordMetaData metaData = null;
        for (int mi = 0; mi < metaDatas.length; mi++) {
			List list = metaDatas[mi];
			for (final Iterator i = list.iterator(); i.hasNext();) {
				metaData = (ARCRecordMetaData) i.next();
				if (metaData.getUrl().equals(url)
						&& metaData.getMimetype().equalsIgnoreCase(JPEG)) {
					if (!found) {
						found = true;
					} else {
						fail("Found a 2nd instance of " + url);
					}
				}
			}
		}
    }
}