/* ===========================================================
 * JFreeChart : a free chart library for the Java(tm) platform
 * ===========================================================
 *
 * (C) Copyright 2000-2013, 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., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301,
 * USA.
 *
 * [Oracle and Java are registered trademarks of Oracle and/or its affiliates.
 * Other names may be trademarks of their respective owners.]
 *
 * --------------------
 * ImageTitleTests.java
 * --------------------
 * (C) Copyright 2004-2013, by Object Refinery Limited and Contributors.
 *
 * Original Author:  David Gilbert (for Object Refinery Limited);
 * Contributor(s):   -;
 *
 * Changes
 * -------
 * 17-Feb-2004 : Version 1 (DG);
 * 21-Mar-2008 : Added tests for arrange method (DG);
 *
 */

package org.jfree.chart.title;

import org.jfree.chart.JFreeChart;
import org.jfree.chart.ui.Size2D;
import org.junit.Test;

import java.awt.Graphics2D;
import java.awt.Image;
import java.awt.image.BufferedImage;
import java.io.IOException;
import java.net.URL;
import javax.swing.ImageIcon;

import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertNotSame;
import static org.junit.Assert.assertSame;

/**
 * Tests for the {@link ImageTitle} class.
 */
public class ImageTitleTest  {

    private Image testImage;

    private Image getTestImage() {
        if (testImage == null) {
            URL imageURL = getClass().getClassLoader().getResource(
                    "org/jfree/chart/gorilla.jpg");
            if (imageURL != null) {
                ImageIcon temp = new ImageIcon(imageURL);
                // use ImageIcon because it waits for the image to load...
                testImage = temp.getImage();
            }
        }
        return testImage;
    }

    /**
     * Check that the equals() method distinguishes all fields.
     */
    @Test
    public void testEquals() {
        ImageTitle t1 = new ImageTitle(getTestImage());
        ImageTitle t2 = new ImageTitle(getTestImage());
        assertEquals(t1, t2);

        t1.setImage(new BufferedImage(2, 1, BufferedImage.TYPE_INT_RGB));
        assertFalse(t1.equals(t2));
        t2.setImage(new BufferedImage(2, 1, BufferedImage.TYPE_INT_RGB));
        // images considered equal only if they're the SAME object
        // TODO: is there a way to do a better test?
        assertFalse(t1.equals(t2));
    }

    /**
     * Two objects that are equal are required to return the same hashCode.
     */
    @Test
    public void testHashcode() {
        ImageTitle t1 = new ImageTitle(getTestImage());
        ImageTitle t2 = new ImageTitle(getTestImage());
        assertEquals(t1, t2);
        int h1 = t1.hashCode();
        int h2 = t2.hashCode();
        assertEquals(h1, h2);
    }

    /**
     * Confirm that cloning works.
     */
    @Test
    public void testCloning() throws CloneNotSupportedException {
        ImageTitle t1 = new ImageTitle(getTestImage());
        ImageTitle t2 = (ImageTitle) t1.clone();
        assertNotSame(t1, t2);
        assertSame(t1.getClass(), t2.getClass());
        assertEquals(t1, t2);
    }

    /**
     * Serialize an instance, restore it, and check for equality.
     */
    @Test
    public void testSerialization() throws IOException, ClassNotFoundException {
        // TODO: add serialization support for images
    }

    private static final double EPSILON = 0.00000001;

    /**
     * Check the width and height.
     */
    @Test
    public void testWidthAndHeight() {
        ImageTitle t1 = new ImageTitle(getTestImage());
        assertEquals(100, t1.getWidth(), EPSILON);
        assertEquals(100, t1.getHeight(), EPSILON);
    }

    /**
     * Some checks for the arrange method.
     */
    @Test
    public void testArrangeNN() {
        BufferedImage image = new BufferedImage(100, 100,
                BufferedImage.TYPE_INT_RGB);
        Graphics2D g2 = image.createGraphics();
        ImageTitle t = new ImageTitle(getTestImage());
        Size2D s = t.arrange(g2);
        assertEquals(102.0, s.getWidth(), EPSILON);
        assertEquals(102.0, s.getHeight(), EPSILON);

        t.setPadding(1.0, 2.0, 3.0, 4.0);
        s = t.arrange(g2);
        assertEquals(106.0, s.getWidth(), EPSILON);
        assertEquals(104.0, s.getHeight(), EPSILON);

        t.setMargin(5.0, 6.0, 7.0, 8.0);
        s = t.arrange(g2);
        assertEquals(120.0, s.getWidth(), EPSILON);
        assertEquals(116.0, s.getHeight(), EPSILON);
    }

}