# XIntervalDataItemTests.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.]
     *
     * ---------------------------
     * XIntervalDataItemTests.java
     * ---------------------------
     * (C) Copyright 2006, 2007, by Object Refinery Limited and Contributors.
     *
     * Original Author:  David Gilbert (for Object Refinery Limited);
     * Contributor(s):   -;
     *
     * Changes
     * -------
     * 20-Oct-2006 : Version 1 (DG);
     *
     */

    package org.jfree.data.xy.junit;

    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.data.xy.XIntervalDataItem;

    /**
     * Tests for the {@link XIntervalDataItem} class.
     */
    public class XIntervalDataItemTests extends TestCase {

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

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

        private static final double EPSILON = 0.00000000001;

        /**
         * Some checks for the constructor.
         */
        public void testConstructor1() {
            XIntervalDataItem item1 = new XIntervalDataItem(1.0, 2.0, 3.0, 4.0);
            assertEquals(new Double(1.0), item1.getX());
            assertEquals(2.0, item1.getXLowValue(), EPSILON);
            assertEquals(3.0, item1.getXHighValue(), EPSILON);
            assertEquals(4.0, item1.getYValue(), EPSILON);
        }

        /**
         * Confirm that the equals method can distinguish all the required fields.
         */
        public void testEquals() {
            XIntervalDataItem item1 = new XIntervalDataItem(1.0, 2.0, 3.0, 4.0);
            XIntervalDataItem item2 = new XIntervalDataItem(1.0, 2.0, 3.0, 4.0);
            assertTrue(item1.equals(item2));
            assertTrue(item2.equals(item1));

            // x
            item1 = new XIntervalDataItem(1.1, 2.0, 3.0, 4.0);
            assertFalse(item1.equals(item2));
            item2 = new XIntervalDataItem(1.1, 2.0, 3.0, 4.0);
            assertTrue(item1.equals(item2));

            // xLow
            item1 = new XIntervalDataItem(1.1, 2.2, 3.0, 4.0);
            assertFalse(item1.equals(item2));
            item2 = new XIntervalDataItem(1.1, 2.2, 3.0, 4.0);
            assertTrue(item1.equals(item2));

            // xHigh
            item1 = new XIntervalDataItem(1.1, 2.2, 3.3, 4.0);
            assertFalse(item1.equals(item2));
            item2 = new XIntervalDataItem(1.1, 2.2, 3.3, 4.0);
            assertTrue(item1.equals(item2));

            // y
            item1 = new XIntervalDataItem(1.1, 2.2, 3.3, 4.4);
            assertFalse(item1.equals(item2));
            item2 = new XIntervalDataItem(1.1, 2.2, 3.3, 4.4);
            assertTrue(item1.equals(item2));

        }

        /**
         * Some checks for the clone() method.
         */
        public void testCloning() {
            XIntervalDataItem item1 = new XIntervalDataItem(1.0, 2.0, 3.0, 4.0);
            XIntervalDataItem item2 = null;
            try {
                item2 = (XIntervalDataItem) item1.clone();
            }
            catch (CloneNotSupportedException e) {
                e.printStackTrace();
            }
            assertTrue(item1 != item2);
            assertTrue(item1.getClass() == item2.getClass());
            assertTrue(item1.equals(item2));
        }

        /**
         * Serialize an instance, restore it, and check for equality.
         */
        public void testSerialization() {
            XIntervalDataItem item1 = new XIntervalDataItem(1.0, 2.0, 3.0, 4.0);
            XIntervalDataItem item2 = null;
            try {
                ByteArrayOutputStream buffer = new ByteArrayOutputStream();
                ObjectOutput out = new ObjectOutputStream(buffer);
                out.writeObject(item1);
                out.close();

                ObjectInput in = new ObjectInputStream(
                        new ByteArrayInputStream(buffer.toByteArray()));
                item2 = (XIntervalDataItem) in.readObject();
                in.close();
            }
            catch (Exception e) {
                e.printStackTrace();
            }
            assertEquals(item1, item2);
        }

    }