# DialTextAnnotationTests.java

    /* ===========================================================
     * JFreeChart : a free chart library for the Java(tm) platform
     * ===========================================================
     *
     * (C) Copyright 2000-2007, 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.
     *
     * [Java is a trademark or registered trademark of Sun Microsystems, Inc.
     * in the United States and other countries.]
     *
     * ----------------------------
     * DialTextAnnotationTests.java
     * ----------------------------
     * (C) Copyright 2006-2007, 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.junit;

    import java.awt.Color;
    import java.awt.Font;
    import java.awt.GradientPaint;
    import java.io.ByteArrayInputStream;
    import java.io.ByteArrayOutputStream;
    import java.io.ObjectInput;
    import java.io.ObjectInputStream;
    import java.io.ObjectOutput;
    import java.io.ObjectOutputStream;

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

    import org.jfree.chart.plot.dial.DialTextAnnotation;

    /**
     * Tests for the {@link DialTextAnnotation} class.
     */
    public class DialTextAnnotationTests extends TestCase {

        /**
         * Returns the tests as a test suite.
         *
         * @return The test suite.
         */
        public static Test suite() {
            return new TestSuite(DialTextAnnotationTests.class);
        }

        /**
         * Constructs a new set of tests.
         *
         * @param name  the name of the tests.
         */
        public DialTextAnnotationTests(String name) {
            super(name);
        }

        /**
         * Confirm that the equals method can distinguish all the required fields.
         */
        public void testEquals() {
            DialTextAnnotation a1 = new DialTextAnnotation("A1");
            DialTextAnnotation a2 = new DialTextAnnotation("A1");
            assertTrue(a1.equals(a2));

            // angle
            a1.setAngle(1.1);
            assertFalse(a1.equals(a2));
            a2.setAngle(1.1);
            assertTrue(a1.equals(a2));

            // radius
            a1.setRadius(9.9);
            assertFalse(a1.equals(a2));
            a2.setRadius(9.9);
            assertTrue(a1.equals(a2));

            // font
            Font f = new Font("SansSerif", Font.PLAIN, 14);
            a1.setFont(f);
            assertFalse(a1.equals(a2));
            a2.setFont(f);
            assertTrue(a1.equals(a2));

            // paint
            a1.setPaint(Color.red);
            assertFalse(a1.equals(a2));
            a2.setPaint(Color.red);
            assertTrue(a1.equals(a2));

            // label
            a1.setLabel("ABC");
            assertFalse(a1.equals(a2));
            a2.setLabel("ABC");
            assertTrue(a1.equals(a2));

            // check an inherited attribute
            a1.setVisible(false);
            assertFalse(a1.equals(a2));
            a2.setVisible(false);
            assertTrue(a1.equals(a2));
        }

        /**
         * Two objects that are equal are required to return the same hashCode.
         */
        public void testHashCode() {
            DialTextAnnotation a1 = new DialTextAnnotation("A1");
            DialTextAnnotation a2 = new DialTextAnnotation("A1");
            assertTrue(a1.equals(a2));
            int h1 = a1.hashCode();
            int h2 = a2.hashCode();
            assertEquals(h1, h2);
        }

        /**
         * Confirm that cloning works.
         */
        public void testCloning() {
            // test a default instance
            DialTextAnnotation a1 = new DialTextAnnotation("A1");
            DialTextAnnotation a2 = null;
            try {
                a2 = (DialTextAnnotation) a1.clone();
            }
            catch (CloneNotSupportedException e) {
                e.printStackTrace();
            }
            assertTrue(a1 != a2);
            assertTrue(a1.getClass() == a2.getClass());
            assertTrue(a1.equals(a2));

            // check that the listener lists are independent
            MyDialLayerChangeListener l1 = new MyDialLayerChangeListener();
            a1.addChangeListener(l1);
            assertTrue(a1.hasListener(l1));
            assertFalse(a2.hasListener(l1));

        }

        /**
         * Serialize an instance, restore it, and check for equality.
         */
        public void testSerialization() {
            // test a default instance
            DialTextAnnotation a1 = new DialTextAnnotation("A1");
            DialTextAnnotation a2 = null;

            try {
                ByteArrayOutputStream buffer = new ByteArrayOutputStream();
                ObjectOutput out = new ObjectOutputStream(buffer);
                out.writeObject(a1);
                out.close();

                ObjectInput in = new ObjectInputStream(
                        new ByteArrayInputStream(buffer.toByteArray()));
                a2 = (DialTextAnnotation) in.readObject();
                in.close();
            }
            catch (Exception e) {
                e.printStackTrace();
            }
            assertEquals(a1, a2);

            // test a custom instance
            a1 = new DialTextAnnotation("A1");
            a1.setPaint(new GradientPaint(1.0f, 2.0f, Color.red, 3.0f, 4.0f,
                    Color.blue));
            a2 = null;

            try {
                ByteArrayOutputStream buffer = new ByteArrayOutputStream();
                ObjectOutput out = new ObjectOutputStream(buffer);
                out.writeObject(a1);
                out.close();

                ObjectInput in = new ObjectInputStream(
                        new ByteArrayInputStream(buffer.toByteArray()));
                a2 = (DialTextAnnotation) in.readObject();
                in.close();
            }
            catch (Exception e) {
                e.printStackTrace();
            }
            assertEquals(a1, a2);

        }

    }