// $Header: /home/cvs/jakarta-jmeter/src/htmlparser/org/htmlparser/tests/FunctionalTests.java,v 1.2 2004/02/10 13:41:08 woolfel Exp $
/*
 * ====================================================================
 * Copyright 2002-2004 The Apache Software Foundation.
 *
 * Licensed 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.
 * 
 */

// The developers of JMeter and Apache are greatful to the developers
// of HTMLParser for giving Apache Software Foundation a non-exclusive
// license. The performance benefits of HTMLParser are clear and the
// users of JMeter will benefit from the hard work the HTMLParser
// team. For detailed information about HTMLParser, the project is
// hosted on sourceforge at http://htmlparser.sourceforge.net/.
//
// HTMLParser was originally created by Somik Raha in 2000. Since then
// a healthy community of users has formed and helped refine the
// design so that it is able to tackle the difficult task of parsing
// dirty HTML. Derrick Oswald is the current lead developer and was kind
// enough to assist JMeter.

package org.htmlparser.tests;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.MalformedURLException;
import java.net.URL;

import junit.framework.TestCase;
import junit.framework.TestSuite;

import org.htmlparser.Node;
import org.htmlparser.Parser;
import org.htmlparser.scanners.ImageScanner;
import org.htmlparser.tags.ImageTag;
import org.htmlparser.util.DefaultParserFeedback;
import org.htmlparser.util.LinkProcessor;
import org.htmlparser.util.NodeIterator;
import org.htmlparser.util.ParserException;

public class FunctionalTests extends TestCase
{

    public FunctionalTests(String arg0)
    {
        super(arg0);
    }

    /**
     * Based on a suspected bug report by Annette Doyle,
     * to check if the no of image tags are correctly 
     * identified by the parser
     */
    public void testNumImageTagsInYahooWithoutRegisteringScanners()
        throws ParserException
    {
        // First count the image tags as is
        int imgTagCount;
        imgTagCount = findImageTagCount();
        try
        {
            int parserImgTagCount = countImageTagsWithHTMLParser();
            assertEquals("Image Tag Count", imgTagCount, parserImgTagCount);
        }
        catch (ParserException e)
        {
            throw new ParserException(
                "Error thrown in call to countImageTagsWithHTMLParser()",
                e);
        }

    }

    public int findImageTagCount()
    {
        int imgTagCount = 0;
        try
        {
            URL url = new URL("http://www.yahoo.com");
            InputStream is = url.openStream();
            BufferedReader reader;
            reader = new BufferedReader(new InputStreamReader(is));
            imgTagCount = countImageTagsWithoutHTMLParser(reader);
            is.close();
        }
        catch (MalformedURLException e)
        {
            System.err.println("URL was malformed!");
        }
        catch (IOException e)
        {
            System.err.println(
                "IO Exception occurred while trying to open stream");
        }
        return imgTagCount;
    }

    public int countImageTagsWithHTMLParser() throws ParserException
    {
        Parser parser =
            new Parser("http://www.yahoo.com", new DefaultParserFeedback());
        parser.addScanner(new ImageScanner("-i", new LinkProcessor()));
        int parserImgTagCount = 0;
        Node node;
        for (NodeIterator e = parser.elements(); e.hasMoreNodes();)
        {
            node = (Node) e.nextNode();
            if (node instanceof ImageTag)
            {
                parserImgTagCount++;
            }
        }
        return parserImgTagCount;
    }

    public int countImageTagsWithoutHTMLParser(BufferedReader reader)
        throws IOException
    {
        String line;
        int imgTagCount = 0;
        do
        {
            line = reader.readLine();
            if (line != null)
            {
                // Check the line for image tags
                String newline = line.toUpperCase();
                int fromIndex = -1;
                do
                {
                    fromIndex = newline.indexOf("