jfreechart example source code file (MonthTests.java)

This example jfreechart source code file (MonthTests.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Java - jfreechart tags/keywords

calendar, date, date, europe/frankfurt, gregoriancalendar, io, locale, locale, month, month, monthtests, nullpointerexception, timeperiodformatexception, timezone, timezone, util

The jfreechart MonthTests.java source code

/* ===========================================================
 * 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.]
 *
 * ---------------
 * MonthTests.java
 * ---------------
 * (C) Copyright 2001-2008, by Object Refinery Limited.
 *
 * Original Author:  David Gilbert (for Object Refinery Limited);
 * Contributor(s):   -;
 *
 * Changes
 * -------
 * 16-Nov-2001 : Version 1 (DG);
 * 14-Feb-2002 : Order of parameters in Month(int, int) constructor
 *               changed (DG);
 * 26-Jun-2002 : Removed unnecessary import (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 non-clonability test (DG);
 * 05-Oct-2006 : Added some new tests (DG);
 * 11-Jul-2007 : Fixed bad time zone assumption (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.util.Calendar;
import java.util.Date;
import java.util.GregorianCalendar;
import java.util.Locale;
import java.util.TimeZone;

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

import org.jfree.data.time.Month;
import org.jfree.data.time.TimePeriodFormatException;
import org.jfree.data.time.Year;
import org.jfree.date.MonthConstants;

/**
 * Tests for the {@link Month} class.
 */
public class MonthTests extends TestCase {

    /** A month. */
    private Month jan1900;

    /** A month. */
    private Month feb1900;

    /** A month. */
    private Month nov9999;

    /** A month. */
    private Month dec9999;

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

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

    /**
     * Common test setup.
     */
    protected void setUp() {
        this.jan1900 = new Month(MonthConstants.JANUARY, 1900);
        this.feb1900 = new Month(MonthConstants.FEBRUARY, 1900);
        this.nov9999 = new Month(MonthConstants.NOVEMBER, 9999);
        this.dec9999 = new Month(MonthConstants.DECEMBER, 9999);
    }

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

    /**
     * Tests the equals method.
     */
    public void testEquals() {
        Month m1 = new Month(MonthConstants.MAY, 2002);
        Month m2 = new Month(MonthConstants.MAY, 2002);
        assertTrue(m1.equals(m2));
    }

    /**
     * In GMT, the end of Feb 2000 is java.util.Date(951,868,799,999L).  Use
     * this to check the Month constructor.
     */
    public void testDateConstructor1() {

        TimeZone zone = TimeZone.getTimeZone("GMT");
        Month m1 = new Month(new Date(951868799999L), zone);
        Month m2 = new Month(new Date(951868800000L), zone);

        assertEquals(MonthConstants.FEBRUARY, m1.getMonth());
        assertEquals(951868799999L, m1.getLastMillisecond(zone));

        assertEquals(MonthConstants.MARCH, m2.getMonth());
        assertEquals(951868800000L, m2.getFirstMillisecond(zone));

    }

    /**
     * In Auckland, the end of Feb 2000 is java.util.Date(951,821,999,999L).
     * Use this to check the Month constructor.
     */
    public void testDateConstructor2() {

        TimeZone zone = TimeZone.getTimeZone("Pacific/Auckland");
        Month m1 = new Month(new Date(951821999999L), zone);
        Month m2 = new Month(new Date(951822000000L), zone);

        assertEquals(MonthConstants.FEBRUARY, m1.getMonth());
        assertEquals(951821999999L, m1.getLastMillisecond(zone));

        assertEquals(MonthConstants.MARCH, m2.getMonth());
        assertEquals(951822000000L, m2.getFirstMillisecond(zone));

    }

    /**
     * Set up a month equal to Jan 1900.  Request the previous month, it should
     * be null.
     */
    public void testJan1900Previous() {
        Month previous = (Month) this.jan1900.previous();
        assertNull(previous);
    }

    /**
     * Set up a month equal to Jan 1900.  Request the next month, it should be
     * Feb 1900.
     */
    public void testJan1900Next() {
        Month next = (Month) this.jan1900.next();
        assertEquals(this.feb1900, next);
    }

    /**
     * Set up a month equal to Dec 9999.  Request the previous month, it should
     * be Nov 9999.
     */
    public void testDec9999Previous() {
        Month previous = (Month) this.dec9999.previous();
        assertEquals(this.nov9999, previous);
    }

    /**
     * Set up a month equal to Dec 9999.  Request the next month, it should be
     * null.
     */
    public void testDec9999Next() {
        Month next = (Month) this.dec9999.next();
        assertNull(next);
    }

    /**
     * Tests the string parsing code...
     */
    public void testParseMonth() {

        Month month = null;

        // test 1...
        try {
            month = Month.parseMonth("1990-01");
        }
        catch (TimePeriodFormatException e) {
            month = new Month(1, 1900);
        }
        assertEquals(1, month.getMonth());
        assertEquals(1990, month.getYear().getYear());

        // test 2...
        try {
            month = Month.parseMonth("02-1991");
        }
        catch (TimePeriodFormatException e) {
            month = new Month(1, 1900);
        }
        assertEquals(2, month.getMonth());
        assertEquals(1991, month.getYear().getYear());

        // test 3...
        try {
            month = Month.parseMonth("March 1993");
        }
        catch (TimePeriodFormatException e) {
            month = new Month(1, 1900);
        }
        assertEquals(3, month.getMonth());
        assertEquals(1993, month.getYear().getYear());

    }

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

        Month m1 = new Month(12, 1999);
        Month m2 = null;

        try {
            ByteArrayOutputStream buffer = new ByteArrayOutputStream();
            ObjectOutput out = new ObjectOutputStream(buffer);
            out.writeObject(m1);
            out.close();

            ObjectInput in = new ObjectInputStream(
                new ByteArrayInputStream(buffer.toByteArray())
            );
            m2 = (Month) in.readObject();
            in.close();
        }
        catch (Exception e) {
            System.out.println(e.toString());
        }
        assertEquals(m1, m2);

    }

    /**
     * Two objects that are equal are required to return the same hashCode.
     */
    public void testHashcode() {
        Month m1 = new Month(2, 2003);
        Month m2 = new Month(2, 2003);
        assertTrue(m1.equals(m2));
        int h1 = m1.hashCode();
        int h2 = m2.hashCode();
        assertEquals(h1, h2);
    }

    /**
     * The {@link Month} class is immutable, so should not be {@link Cloneable}.
     */
    public void testNotCloneable() {
        Month m = new Month(2, 2003);
        assertFalse(m instanceof Cloneable);
    }

    /**
     * Some checks for the getFirstMillisecond() method.
     */
    public void testGetFirstMillisecond() {
        Locale saved = Locale.getDefault();
        Locale.setDefault(Locale.UK);
        TimeZone savedZone = TimeZone.getDefault();
        TimeZone.setDefault(TimeZone.getTimeZone("Europe/London"));
        Month m = new Month(3, 1970);
        assertEquals(5094000000L, m.getFirstMillisecond());
        Locale.setDefault(saved);
        TimeZone.setDefault(savedZone);
    }

    /**
     * Some checks for the getFirstMillisecond(TimeZone) method.
     */
    public void testGetFirstMillisecondWithTimeZone() {
        Month m = new Month(2, 1950);
        TimeZone zone = TimeZone.getTimeZone("America/Los_Angeles");
        assertEquals(-628444800000L, m.getFirstMillisecond(zone));

        // try null calendar
        boolean pass = false;
        try {
            m.getFirstMillisecond((TimeZone) null);
        }
        catch (NullPointerException e) {
            pass = true;
        }
        assertTrue(pass);
    }

    /**
     * Some checks for the getFirstMillisecond(TimeZone) method.
     */
    public void testGetFirstMillisecondWithCalendar() {
        Month m = new Month(1, 2001);
        GregorianCalendar calendar = new GregorianCalendar(Locale.GERMANY);
        calendar.setTimeZone(TimeZone.getTimeZone("Europe/Frankfurt"));
        assertEquals(978307200000L, m.getFirstMillisecond(calendar));

        // try null calendar
        boolean pass = false;
        try {
            m.getFirstMillisecond((Calendar) null);
        }
        catch (NullPointerException e) {
            pass = true;
        }
        assertTrue(pass);
    }

    /**
     * Some checks for the getLastMillisecond() method.
     */
    public void testGetLastMillisecond() {
        Locale saved = Locale.getDefault();
        Locale.setDefault(Locale.UK);
        TimeZone savedZone = TimeZone.getDefault();
        TimeZone.setDefault(TimeZone.getTimeZone("Europe/London"));
        Month m = new Month(3, 1970);
        assertEquals(7772399999L, m.getLastMillisecond());
        Locale.setDefault(saved);
        TimeZone.setDefault(savedZone);
    }

    /**
     * Some checks for the getLastMillisecond(TimeZone) method.
     */
    public void testGetLastMillisecondWithTimeZone() {
        Month m = new Month(2, 1950);
        TimeZone zone = TimeZone.getTimeZone("America/Los_Angeles");
        assertEquals(-626025600001L, m.getLastMillisecond(zone));

        // try null calendar
        boolean pass = false;
        try {
            m.getLastMillisecond((TimeZone) null);
        }
        catch (NullPointerException e) {
            pass = true;
        }
        assertTrue(pass);
    }

    /**
     * Some checks for the getLastMillisecond(TimeZone) method.
     */
    public void testGetLastMillisecondWithCalendar() {
        Month m = new Month(3, 2001);
        GregorianCalendar calendar = new GregorianCalendar(Locale.GERMANY);
        calendar.setTimeZone(TimeZone.getTimeZone("Europe/Frankfurt"));
        assertEquals(986083199999L, m.getLastMillisecond(calendar));

        // try null calendar
        boolean pass = false;
        try {
            m.getLastMillisecond((Calendar) null);
        }
        catch (NullPointerException e) {
            pass = true;
        }
        assertTrue(pass);
    }

    /**
     * Some checks for the getSerialIndex() method.
     */
    public void testGetSerialIndex() {
        Month m = new Month(1, 2000);
        assertEquals(24001L, m.getSerialIndex());
        m = new Month(1, 1900);
        assertEquals(22801L, m.getSerialIndex());
    }

    /**
     * Some checks for the testNext() method.
     */
    public void testNext() {
        Month m = new Month(12, 2000);
        m = (Month) m.next();
        assertEquals(new Year(2001), m.getYear());
        assertEquals(1, m.getMonth());
        m = new Month(12, 9999);
        assertNull(m.next());
    }

    /**
     * Some checks for the getStart() method.
     */
    public void testGetStart() {
        Locale saved = Locale.getDefault();
        Locale.setDefault(Locale.ITALY);
        Calendar cal = Calendar.getInstance(Locale.ITALY);
        cal.set(2006, Calendar.MARCH, 1, 0, 0, 0);
        cal.set(Calendar.MILLISECOND, 0);
        Month m = new Month(3, 2006);
        assertEquals(cal.getTime(), m.getStart());
        Locale.setDefault(saved);
    }

    /**
     * Some checks for the getEnd() method.
     */
    public void testGetEnd() {
        Locale saved = Locale.getDefault();
        Locale.setDefault(Locale.ITALY);
        Calendar cal = Calendar.getInstance(Locale.ITALY);
        cal.set(2006, Calendar.JANUARY, 31, 23, 59, 59);
        cal.set(Calendar.MILLISECOND, 999);
        Month m = new Month(1, 2006);
        assertEquals(cal.getTime(), m.getEnd());
        Locale.setDefault(saved);
    }

}