DateTickTests.java

/* ===========================================================
 * JFreeChart : a free chart library for the Java(tm) platform
 * ===========================================================
 *
 * (C) Copyright 2000-2008, 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.]
 *
 * ------------------
 * DateTickTests.java
 * ------------------
 * (C) Copyright 2004-2008, by Object Refinery Limited and Contributors.
 *
 * Original Author:  David Gilbert (for Object Refinery Limited);
 * Contributor(s):   -;
 *
 * Changes
 * -------
 * 13-May-2004 : Version 1 (DG);
 * 25-Sep-2008 : Extended testEquals() to cover new fields (DG);
 */

package org.jfree.chart.axis.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 java.util.Date;

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

import org.jfree.chart.axis.DateTick;
import org.jfree.chart.axis.TickType;
import org.jfree.ui.TextAnchor;

/**
 * Tests for the {@link DateTick} class.
 */
public class DateTickTests extends TestCase {

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

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

    /**
     * Confirm that the equals method can distinguish all the required fields.
     */
    public void testEquals() {

        Date d1 = new Date(0L);
        Date d2 = new Date(1L);
        String l1 = "Label 1";
        String l2 = "Label 2";
        TextAnchor ta1 = TextAnchor.CENTER;
        TextAnchor ta2 = TextAnchor.BASELINE_LEFT;

        DateTick t1 = new DateTick(d1, l1, ta1, ta1, Math.PI / 2.0);
        DateTick t2 = new DateTick(d1, l1, ta1, ta1, Math.PI / 2.0);
        assertTrue(t1.equals(t2));

        t1 = new DateTick(d2, l1, ta1, ta1, Math.PI / 2.0);
        assertFalse(t1.equals(t2));
        t2 = new DateTick(d2, l1, ta1, ta1, Math.PI / 2.0);
        assertTrue(t1.equals(t2));

        t1 = new DateTick(d1, l2, ta1, ta1, Math.PI / 2.0);
        assertFalse(t1.equals(t2));
        t2 = new DateTick(d1, l2, ta1, ta1, Math.PI / 2.0);
        assertTrue(t1.equals(t2));

        t1 = new DateTick(d1, l1, ta2, ta1, Math.PI / 2.0);
        assertFalse(t1.equals(t2));
        t2 = new DateTick(d1, l1, ta2, ta1, Math.PI / 2.0);
        assertTrue(t1.equals(t2));

        t1 = new DateTick(d1, l1, ta1, ta2, Math.PI / 2.0);
        assertFalse(t1.equals(t2));
        t2 = new DateTick(d1, l1, ta1, ta2, Math.PI / 2.0);
        assertTrue(t1.equals(t2));

        t1 = new DateTick(d1, l1, ta1, ta1, Math.PI / 3.0);
        assertFalse(t1.equals(t2));
        t2 = new DateTick(d1, l1, ta1, ta1, Math.PI / 3.0);
        assertTrue(t1.equals(t2));

        t1 = new DateTick(TickType.MINOR, d1, l1, ta1, ta1, Math.PI);
        t2 = new DateTick(TickType.MAJOR, d1, l1, ta1, ta1, Math.PI);
        assertFalse(t1.equals(t2));
        t2 = new DateTick(TickType.MINOR, d1, l1, ta1, ta1, Math.PI);
        assertTrue(t1.equals(t2));

    }

    /**
     * Two objects that are equal are required to return the same hashCode.
     */
    public void testHashCode() {
        Date d1 = new Date(0L);
        String l1 = "Label 1";
        TextAnchor ta1 = TextAnchor.CENTER;

        DateTick t1 = new DateTick(d1, l1, ta1, ta1, Math.PI / 2.0);
        DateTick t2 = new DateTick(d1, l1, ta1, ta1, Math.PI / 2.0);
        assertTrue(t1.equals(t2));
        int h1 = t1.hashCode();
        int h2 = t2.hashCode();
        assertEquals(h1, h2);
    }

    /**
     * Confirm that cloning works.
     */
    public void testCloning() {
        DateTick t1 = new DateTick(new Date(0L), "Label", TextAnchor.CENTER,
                TextAnchor.CENTER, 10.0);
        DateTick t2 = null;
        try {
            t2 = (DateTick) t1.clone();
        }
        catch (CloneNotSupportedException e) {
            e.printStackTrace();
        }
        assertTrue(t1 != t2);
        assertTrue(t1.getClass() == t2.getClass());
        assertTrue(t1.equals(t2));
    }

    /**
     * Serialize an instance, restore it, and check for equality.
     */
    public void testSerialization() {

        DateTick t1 = new DateTick(new Date(0L), "Label", TextAnchor.CENTER,
                TextAnchor.CENTER, 10.0);
        DateTick t2 = null;

        try {
            ByteArrayOutputStream buffer = new ByteArrayOutputStream();
            ObjectOutput out = new ObjectOutputStream(buffer);
            out.writeObject(t1);
            out.close();

            ObjectInput in = new ObjectInputStream(
                    new ByteArrayInputStream(buffer.toByteArray()));
            t2 = (DateTick) in.readObject();
            in.close();
        }
        catch (Exception e) {
            e.printStackTrace();
        }
        assertEquals(t1, t2);

    }

}