DialBackgroundTest.java

/* ===========================================================
 * 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.]
 *
 * -----------------------
 * DialBackgroundTest.java
 * -----------------------
 * (C) Copyright 2006-2013, by Object Refinery Limited and Contributors.
 *
 * Original Author:  David Gilbert (for Object Refinery Limited);
 * Contributor(s):   -;
 *
 * Changes
 * -------
 * 03-Nov-2006 : Version 1 (DG);
 *
 */

package org.jfree.chart.plot.dial;

import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertTrue;

import java.awt.Color;
import java.awt.GradientPaint;

import org.jfree.chart.TestUtilities;

import org.jfree.ui.GradientPaintTransformType;
import org.jfree.ui.StandardGradientPaintTransformer;
import org.junit.Test;

/**
 * Tests for the {@link DialBackground} class.
 */
public class DialBackgroundTest {

    /**
     * Confirm that the equals method can distinguish all the required fields.
     */
    @Test
    public void testEquals() {
        DialBackground b1 = new DialBackground();
        DialBackground b2 = new DialBackground();
        assertTrue(b1.equals(b2));

        // paint
        b1.setPaint(new GradientPaint(1.0f, 2.0f, Color.red, 3.0f, 4.0f,
                Color.yellow));
        assertFalse(b1.equals(b2));
        b2.setPaint(new GradientPaint(1.0f, 2.0f, Color.red, 3.0f, 4.0f,
                Color.yellow));
        assertTrue(b1.equals(b2));

        // gradient paint transformer
        b1.setGradientPaintTransformer(new StandardGradientPaintTransformer(
                GradientPaintTransformType.CENTER_VERTICAL));
        assertFalse(b1.equals(b2));
        b2.setGradientPaintTransformer(new StandardGradientPaintTransformer(
                GradientPaintTransformType.CENTER_VERTICAL));
        assertTrue(b1.equals(b2));

        // check an inherited attribute
        b1.setVisible(false);
        assertFalse(b1.equals(b2));
        b2.setVisible(false);
        assertTrue(b1.equals(b2));

    }

    /**
     * Two objects that are equal are required to return the same hashCode.
     */
    @Test
    public void testHashCode() {
        DialBackground b1 = new DialBackground(Color.red);
        DialBackground b2 = new DialBackground(Color.red);
        assertTrue(b1.equals(b2));
        int h1 = b1.hashCode();
        int h2 = b2.hashCode();
        assertEquals(h1, h2);
    }

    /**
     * Confirm that cloning works.
     */
    @Test
    public void testCloning() throws CloneNotSupportedException {
        // test default instance
        DialBackground b1 = new DialBackground();
        DialBackground b2 = (DialBackground) b1.clone();
        assertTrue(b1 != b2);
        assertTrue(b1.getClass() == b2.getClass());
        assertTrue(b1.equals(b2));

        // test a customised instance
        b1 = new DialBackground();
        b1.setPaint(new GradientPaint(1.0f, 2.0f, Color.red, 3.0f, 4.0f,
                Color.green));
        b1.setGradientPaintTransformer(new StandardGradientPaintTransformer(
                GradientPaintTransformType.CENTER_VERTICAL));
        b2 = (DialBackground) b1.clone();
        assertTrue(b1 != b2);
        assertTrue(b1.getClass() == b2.getClass());
        assertTrue(b1.equals(b2));

        // check that the listener lists are independent
        MyDialLayerChangeListener l1 = new MyDialLayerChangeListener();
        b1.addChangeListener(l1);
        assertTrue(b1.hasListener(l1));
        assertFalse(b2.hasListener(l1));
    }

    /**
     * Serialize an instance, restore it, and check for equality.
     */
    @Test
    public void testSerialization() {
        // test a default instance
        DialBackground b1 = new DialBackground();
        DialBackground b2 = (DialBackground) TestUtilities.serialised(b1);
        assertEquals(b1, b2);

        // test a customised instance
        b1 = new DialBackground();
        b1.setPaint(new GradientPaint(1.0f, 2.0f, Color.red, 3.0f, 4.0f,
                Color.green));
        b1.setGradientPaintTransformer(new StandardGradientPaintTransformer(
                GradientPaintTransformType.CENTER_VERTICAL));

        b2 = (DialBackground) TestUtilities.serialised(b1);
        assertEquals(b1, b2);
    }

}