serialdatetests.java

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/* ===================================================
 * JCommon : a free general purpose Java class library
 * ===================================================
 *
 * Project Info:  http://www.jfree.org/jcommon/index.html
 * Project Lead:  David Gilbert ([e-mail]);
 *
 * (C) Copyright 2000-2003, by Object Refinery Limited and Contributors.
 *
 * 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., 59 Temple Place, Suite 330,
 * Boston, MA 02111-1307, USA.
 *
 * --------------------
 * SerialDateTests.java
 * --------------------
 * (C) Copyright 2001-2003, by Object Refinery Limited.
 *
 * Original Author:  David Gilbert (for Object Refinery Limited);
 * Contributor(s):   -;
 *
 * $Id: SerialDateTests.java,v 1.3 2003/06/13 15:46:54 mungady Exp $
 *
 * Changes
 * -------
 * 15-Nov-2001 : Version 1 (DG);
 * 25-Jun-2002 : Removed unnecessary import (DG);
 * 24-Oct-2002 : Fixed errors reported by Checkstyle (DG);
 * 13-Mar-2003 : Added serialization test (DG);
 *
 */

package org.jfree.date.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.date.SerialDate;

/**
 * Some JUnit tests for the {@link SerialDate} class.
 *
 * @author David Gilbert
 */
public class SerialDateTests extends TestCase {

    /** Date representing November 9. */
    private SerialDate nov9Y2001;

    /**
     * Creates a new test case.
     *
     * @param name  the name.
     */
    public SerialDateTests(String name) {
        super(name);
    }

    /**
     * Returns a test suite for the JUnit test runner.
     *
     * @return the test suite.
     */
    public static Test suite() {
        return new TestSuite(SerialDateTests.class);
    }

    /**
     * Test set up.
     */
    protected void setUp() {
        this.nov9Y2001 = SerialDate.createInstance(9, SerialDate.NOVEMBER, 2001);
    }

    /**
     * 9 Nov 2001 plus two months should be 9 Jan 2002.
     */
    public void testAddMonthsTo9Nov2001() {
        SerialDate jan9Y2002 = SerialDate.addMonths(2, this.nov9Y2001);
        SerialDate answer = SerialDate.createInstance(9, 1, 2002);
        assertEquals(answer, jan9Y2002);
    }

    /**
     * A test case for a reported bug, now fixed.
     */
    public void testAddMonthsTo5Oct2003() {
        SerialDate d1 = SerialDate.createInstance(5, SerialDate.OCTOBER, 2003);
        SerialDate d2 = SerialDate.addMonths(2, d1);
        assertEquals(d2, SerialDate.createInstance(5, SerialDate.DECEMBER, 2003));
    }

    /**
     * A test case for a reported bug, now fixed.
     */
    public void testAddMonthsTo1Jan2003() {
        SerialDate d1 = SerialDate.createInstance(1, SerialDate.JANUARY, 2003);
        SerialDate d2 = SerialDate.addMonths(0, d1);
        assertEquals(d2, d1);

    }

    /**
     * Monday preceding Friday 9 November 2001 should be 5 November.
     */
    public void testMondayPrecedingFriday9Nov2001() {
        SerialDate mondayBefore = SerialDate.getPreviousDayOfWeek(SerialDate.MONDAY, nov9Y2001);
        assertEquals(5, mondayBefore.getDayOfMonth());
    }

    /**
     * Monday following Friday 9 November 2001 should be 12 November.
     */
    public void testMondayFollowingFriday9Nov2001() {
        SerialDate mondayAfter = SerialDate.getFollowingDayOfWeek(SerialDate.MONDAY, nov9Y2001);
        assertEquals(12, mondayAfter.getDayOfMonth());
    }

    /**
     * Monday nearest Friday 9 November 2001 should be 12 November.
     */
    public void testMondayNearestFriday9Nov2001() {
        SerialDate mondayNearest = SerialDate.getNearestDayOfWeek(SerialDate.MONDAY, nov9Y2001);
        assertEquals(12, mondayNearest.getDayOfMonth());
    }

    /**
     * The Monday nearest to 22nd January 1970 falls on the 19th.
     */
    public void testMondayNearest22Jan1970() {
        SerialDate jan22Y1970 = SerialDate.createInstance(22, SerialDate.JANUARY, 1970);
        SerialDate mondayNearest = SerialDate.getNearestDayOfWeek(SerialDate.MONDAY, jan22Y1970);
        assertEquals(19, mondayNearest.getDayOfMonth());
    }

    /**
     * Test that the conversion of days to strings returns the right result.  Actually, this result
     * depends on the Locale so this test needs to be modified.
     */
    public void testWeekdayCodeToString() {

        String test = SerialDate.weekdayCodeToString(SerialDate.SATURDAY);
        assertEquals("Saturday", test);

    }

    /**
     * Test the conversion of a string to a weekday.  Note that this test will fail if the default
     * locale doesn't use English weekday names...devise a better test!
     */
    public void testStringToWeekday() {

        int weekday = SerialDate.stringToWeekdayCode("Wednesday");
        assertEquals(SerialDate.WEDNESDAY, weekday);

        weekday = SerialDate.stringToWeekdayCode(" Wednesday ");
        assertEquals(SerialDate.WEDNESDAY, weekday);

        weekday = SerialDate.stringToWeekdayCode("Wed");
        assertEquals(SerialDate.WEDNESDAY, weekday);

    }

    /**
     * Test the conversion of a string to a month.  Note that this test will fail if the default
     * locale doesn't use English month names...devise a better test!
     */
    public void testStringToMonthCode() {

        int m = SerialDate.stringToMonthCode("January");
        assertEquals(SerialDate.JANUARY, m);

        m = SerialDate.stringToMonthCode(" January ");
        assertEquals(SerialDate.JANUARY, m);

        m = SerialDate.stringToMonthCode("Jan");
        assertEquals(SerialDate.JANUARY, m);

    }

    /**
     * Tests the conversion of a month code to a string.
     */
    public void testMonthCodeToStringCode() {

        String test = SerialDate.monthCodeToString(SerialDate.DECEMBER);
        assertEquals("December", test);

    }

    /**
     * 1900 is not a leap year.
     */
    public void testIsNotLeapYear1900() {
        assertTrue(!SerialDate.isLeapYear(1900));
    }

    /**
     * 2000 is a leap year.
     */
    public void testIsLeapYear2000() {
        assertTrue(SerialDate.isLeapYear(2000));
    }

    /**
     * The number of leap years from 1900 up-to-and-including 1899 is 0.
     */
    public void testLeapYearCount1899() {
        assertEquals(SerialDate.leapYearCount(1899), 0);
    }

    /**
     * The number of leap years from 1900 up-to-and-including 1903 is 0.
     */
    public void testLeapYearCount1903() {
        assertEquals(SerialDate.leapYearCount(1903), 0);
    }

    /**
     * The number of leap years from 1900 up-to-and-including 1904 is 1.
     */
    public void testLeapYearCount1904() {
        assertEquals(SerialDate.leapYearCount(1904), 1);
    }

    /**
     * The number of leap years from 1900 up-to-and-including 1999 is 24.
     */
    public void testLeapYearCount1999() {
        assertEquals(SerialDate.leapYearCount(1999), 24);
    }

    /**
     * The number of leap years from 1900 up-to-and-including 2000 is 25.
     */
    public void testLeapYearCount2000() {
        assertEquals(SerialDate.leapYearCount(2000), 25);
    }

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

        SerialDate d1 = SerialDate.createInstance(15, 4, 2000);
        SerialDate 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 = (SerialDate) in.readObject();
            in.close();
        }
        catch (Exception e) {
            System.out.println(e.toString());
        }
        assertEquals(d1, d2);

    }

}