/* ===========================================================

 * JFreeChart : a free chart library for the Java(tm) platform

 * ===========================================================

 *

 * (C) Copyright 2000-2004, by Object Refinery Limited and Contributors.

 *

 * Project Info:  http://www.jfree.org/jfreechart/index.html

 *

 * This library is free software; you can redistribute it and/or modify it under the terms

 * of the GNU Lesser General Public License as published by the Free Software Foundation;

 * either version 2.1 of the License, or (at your option) any later version.

 *

 * This library 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 General Public License for more details.

 *

 * You should have received a copy of the GNU Lesser General Public License along with this

 * library; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330,

 * Boston, MA 02111-1307, USA.

 *

 * [Java is a trademark or registered trademark of Sun Microsystems, Inc. 

 * in the United States and other countries.]

 *

 * -------------------------

 * StackedBarChartTests.java

 * -------------------------

 * (C) Copyright 2002-2004, by Object Refinery Limited.

 *

 * Original Author:  David Gilbert (for Object Refinery Limited);

 * Contributor(s):   -;

 *

 * $Id: StackedBarChartTests.java,v 1.1 2004/08/31 14:35:34 mungady Exp $

 *

 * Changes:

 * --------

 * 11-Jun-2002 : Version 1 (DG);

 * 25-Jun-2002 : Removed unnecessary import (DG);

 * 17-Oct-2002 : Fixed errors reported by Checkstyle (DG);

 * 29-Jan-2004 : Renamed StackedHorizontalBarChartTests --> StackedBarChartTests (DG);

 * 

 */



package org.jfree.chart.junit;



import java.awt.Graphics2D;

import java.awt.geom.Rectangle2D;

import java.awt.image.BufferedImage;



import junit.framework.Test;

import junit.framework.TestCase;

import junit.framework.TestSuite;



import org.jfree.chart.ChartFactory;

import org.jfree.chart.JFreeChart;

import org.jfree.chart.axis.ValueAxis;

import org.jfree.chart.event.ChartChangeEvent;

import org.jfree.chart.event.ChartChangeListener;

import org.jfree.chart.plot.PlotOrientation;

import org.jfree.data.Range;

import org.jfree.data.category.CategoryDataset;

import org.jfree.data.general.DatasetUtilities;



/**

 * Tests for a stacked bar chart.

 *

 */

public class StackedBarChartTests extends TestCase {



    /** A chart. */

    private JFreeChart chart;



    /**

     * Returns the tests as a test suite.

     *

     * @return the test suite.

     */

    public static Test suite() {

        return new TestSuite(StackedBarChartTests.class);

    }



    /**

     * Constructs a new set of tests.

     *

     * @param name  the name of the tests.

     */

    public StackedBarChartTests(String name) {

        super(name);

    }



    /**

     * Common test setup.

     */

    protected void setUp() {

        this.chart = createChart();

    }



    /**

     * Draws the chart with a null info object to make sure that no exceptions are thrown (a

     * problem that was occurring at one point).

     */

    public void testDrawWithNullInfo() {



        boolean success = false;



        try {

            BufferedImage image = new BufferedImage(200 , 100, BufferedImage.TYPE_INT_RGB);

            Graphics2D g2 = image.createGraphics();

            this.chart.draw(g2, new Rectangle2D.Double(0, 0, 200, 100), null, null);

            g2.dispose();

            success = true;

        }

        catch (Exception e) {

          success = false;

        }



        assertTrue(success);



    }



    /**

     * Replaces the dataset and checks that it has changed as expected.

     */

    public void testReplaceDataset() {



        // create a dataset...

        Number[][] data = new Integer[][]

            {{new Integer(-30), new Integer(-20)},

             {new Integer(-10), new Integer(10)},

             {new Integer(20), new Integer(30)}};



        CategoryDataset newData = DatasetUtilities.createCategoryDataset("S", "C", data);



        LocalListener l = new LocalListener();

        this.chart.addChangeListener(l);

        this.chart.getCategoryPlot().setDataset(newData);

        assertEquals(true, l.flag);

        ValueAxis axis = this.chart.getCategoryPlot().getRangeAxis();

        Range range = axis.getRange();

        assertTrue("Expecting the lower bound of the range to be around -30: "

                    + range.getLowerBound(), range.getLowerBound() <= -30);

        assertTrue("Expecting the upper bound of the range to be around 30: "

                   + range.getUpperBound(), range.getUpperBound() >= 30);



    }



    /**

     * Create a horizontal bar chart with sample data in the range -3 to +3.

     *

     * @return the chart.

     */

    private static JFreeChart createChart() {



        // create a dataset...

        Number[][] data = new Integer[][]

            {{new Integer(-3), new Integer(-2)},

             {new Integer(-1), new Integer(1)},

             {new Integer(2), new Integer(3)}};



        CategoryDataset dataset = DatasetUtilities.createCategoryDataset("S", "C", data);



        // create the chart...

        return ChartFactory.createStackedBarChart(

            "Stacked Bar Chart",  // chart title

            "Domain", "Range",

            dataset,      // data

            PlotOrientation.HORIZONTAL,

            true,         // include legend

            true,

            false

        );



    }



    /**

     * A chart change listener.

     */

    static class LocalListener implements ChartChangeListener {



        /** A flag. */

        private boolean flag = false;



        /**

         * Event handler.

         *

         * @param event  the event.

         */

        public void chartChanged(ChartChangeEvent event) {

            this.flag = true;

        }



    }



}

