daytests.java

制作图表的好工具

/* ===========================================================
 * JFreeChart : a free chart library for the Java(tm) platform
 * ===========================================================
 *
 * (C) Copyright 2000-2005, 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.]
 *
 * -------------
 * DayTests.java
 * -------------
 * (C) Copyright 2001-2005, by Object Refinery Limited.
 *
 * Original Author:  David Gilbert (for Object Refinery Limited);
 * Contributor(s):   -;
 *
 * $Id: DayTests.java,v 1.6.2.1 2005/10/25 21:35:47 mungady Exp $
 *
 * Changes
 * -------
 * 15-Nov-2001 : Version 1 (DG);
 * 20-Mar-2002 : Added new tests for Day constructor and getStart() and 
 *               getEnd() in different time zones (DG);
 * 26-Jun-2002 : Removed unnecessary imports (DG);
 * 17-Oct-2002 : Fixed errors reported by Checkstyle (DG);
 * 13-Mar-2003 : Added serialization test (DG);
 * 21-Oct-2003 : Added hashCode test (DG);
 * 11-Jan-2005 : Added test for non-clonability (DG);
 *
 */

package org.jfree.data.time.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.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.GregorianCalendar;
import java.util.TimeZone;

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

import org.jfree.data.time.Day;
import org.jfree.date.MonthConstants;

/**
 * Tests for the {@link Day} class.
 */
public class DayTests extends TestCase {

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

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

    /**
     * Common test setup.
     */
    protected void setUp() {
        // no setup required
    }

    /**
     * Check that a Day instance is equal to itself.
     *
     * SourceForge Bug ID: 558850.
     */
    public void testEqualsSelf() {
        Day day = new Day();
        assertTrue(day.equals(day));
    }

    /**
     * Tests the equals method.
     */
    public void testEquals() {
        Day day1 = new Day(29, MonthConstants.MARCH, 2002);
        Day day2 = new Day(29, MonthConstants.MARCH, 2002);
        assertTrue(day1.equals(day2));
    }

    /**
     * In GMT, the end of 29 Feb 2004 is java.util.Date(1,078,099,199,999L).  
     * Use this to check the day constructor.
     */
    public void testDateConstructor1() {

        TimeZone zone = TimeZone.getTimeZone("GMT");
        Day d1 = new Day(new Date(1078099199999L), zone);
        Day d2 = new Day(new Date(1078099200000L), zone);

        assertEquals(MonthConstants.FEBRUARY, d1.getMonth());
        assertEquals(1078099199999L, d1.getLastMillisecond(zone));

        assertEquals(MonthConstants.MARCH, d2.getMonth());
        assertEquals(1078099200000L, d2.getFirstMillisecond(zone));

    }

    /**
     * In Helsinki, the end of 29 Feb 2004 is 
     * java.util.Date(1,078,091,999,999L).  Use this to check the Day 
     * constructor.
     */
    public void testDateConstructor2() {

        TimeZone zone = TimeZone.getTimeZone("Europe/Helsinki");
        Day d1 = new Day(new Date(1078091999999L), zone);
        Day d2 = new Day(new Date(1078092000000L), zone);

        assertEquals(MonthConstants.FEBRUARY, d1.getMonth());
        assertEquals(1078091999999L, d1.getLastMillisecond(zone));

        assertEquals(MonthConstants.MARCH, d2.getMonth());
        assertEquals(1078092000000L, d2.getFirstMillisecond(zone));

    }

    /**
     * Set up a day equal to 1 January 1900.  Request the previous day, it 
     * should be null.
     */
    public void test1Jan1900Previous() {

        Day jan1st1900 = new Day(1, MonthConstants.JANUARY, 1900);
        Day previous = (Day) jan1st1900.previous();
        assertNull(previous);

    }

    /**
     * Set up a day equal to 1 January 1900.  Request the next day, it should 
     * be 2 January 1900.
     */
    public void test1Jan1900Next() {

        Day jan1st1900 = new Day(1, MonthConstants.JANUARY, 1900);
        Day next = (Day) jan1st1900.next();
        assertEquals(2, next.getDayOfMonth());

    }

    /**
     * Set up a day equal to 31 December 9999.  Request the previous day, it 
     * should be 30 December 9999.
     */
    public void test31Dec9999Previous() {

        Day dec31st9999 = new Day(31, MonthConstants.DECEMBER, 9999);
        Day previous = (Day) dec31st9999.previous();
        assertEquals(30, previous.getDayOfMonth());

    }

    /**
     * Set up a day equal to 31 December 9999.  Request the next day, it should
     * be null.
     */
    public void test31Dec9999Next() {

        Day dec31st9999 = new Day(31, MonthConstants.DECEMBER, 9999);
        Day next = (Day) dec31st9999.next();
        assertNull(next);

    }

    /**
     * Problem for date parsing.
     * <p>
     * This test works only correct if the short pattern of the date
     * format is "dd/MM/yyyy". If not, this test will result in a
     * false negative.
     * 
     * @throws ParseException on parsing errors.
     */
    public void testParseDay() throws ParseException {

        GregorianCalendar gc = new GregorianCalendar(2001, 12, 31);
        SimpleDateFormat format = new SimpleDateFormat("dd/MM/yyyy");
        Date reference = format.parse("31/12/2001");
        if (reference.equals(gc.getTime())) {
            // test 1...
            Day d = Day.parseDay("31/12/2001");
            assertEquals(37256, d.getSerialDate().toSerial());
        }

        // test 2...
        Day d = Day.parseDay("2001-12-31");
        assertEquals(37256, d.getSerialDate().toSerial());

    }

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

        Day d1 = new Day(15, 4, 2000);
        Day d2 = null;

        try {
            ByteArrayOutputStream buffer = new ByteArrayOutputStream();
            ObjectOutput out = new ObjectOutputStream(buffer);
            out.writeObject(d1);
            out.close();

            ObjectInput in = new ObjectInputStream(
                new ByteArrayInputStream(buffer.toByteArray())
            );
            d2 = (Day) in.readObject();
            in.close();
        }
        catch (Exception e) {
            System.out.println(e.toString());
        }
        assertEquals(d1, d2);

    }
    
    /**
     * Two objects that are equal are required to return the same hashCode. 
     */
    public void testHashcode() {
        Day d1 = new Day(1, 2, 2003);
        Day d2 = new Day(1, 2, 2003);
        assertTrue(d1.equals(d2));
        int h1 = d1.hashCode();
        int h2 = d2.hashCode();
        assertEquals(h1, h2);
    }
    
    /**
     * The {@link Day} class is immutable, so should not be {@link Cloneable}.
     */
    public void testNotCloneable() {
        Day d = new Day(1, 2, 2003);
        assertFalse(d instanceof Cloneable);
    }

}