/* ===========================================================
 * 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.]
 *
 * --------------
 * WeekTests.java
 * --------------
 * (C) Copyright 2002-2005, by Object Refinery Limited.
 *
 * Original Author:  David Gilbert (for Object Refinery Limited);
 * Contributor(s):   -;
 *
 * $Id: WeekTests.java,v 1.5.2.1 2005/10/25 21:35:47 mungady Exp $
 *
 * Changes
 * -------
 * 05-Apr-2002 : Version 1 (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);
 *
 */

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.Locale;
import java.util.TimeZone;

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

import org.jfree.data.time.Week;

/**
 * Tests for the {@link Week} class.
 */
public class WeekTests extends TestCase {

    /** A week. */
    private Week w1Y1900;

    /** A week. */
    private Week w2Y1900;

    /** A week. */
    private Week w51Y9999;

    /** A week. */
    private Week w52Y9999;

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

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

    /**
     * Common test setup.
     */
    protected void setUp() {
        this.w1Y1900 = new Week(1, 1900);
        this.w2Y1900 = new Week(2, 1900);
        this.w51Y9999 = new Week(51, 9999);
        this.w52Y9999 = new Week(52, 9999);
    }

    /**
     * Tests the equals method.
     */
    public void testEquals() {
        Week w1 = new Week(1, 2002);
        Week w2 = new Week(1, 2002);
        assertTrue(w1.equals(w2));
        assertTrue(w2.equals(w1));
        
        w1 = new Week(2, 2002);
        assertFalse(w1.equals(w2));
        w2 = new Week(2, 2002);
        assertTrue(w1.equals(w2));
        
        w1 = new Week(2, 2003);
        assertFalse(w1.equals(w2));
        w2 = new Week(2, 2003);
        assertTrue(w1.equals(w2));
    }

    /**
     * Request the week before week 1, 1900: it should be <code>null</code>.
     */
    public void testW1Y1900Previous() {
        Week previous = (Week) this.w1Y1900.previous();
        assertNull(previous);
    }

    /**
     * Request the week after week 1, 1900: it should be week 2, 1900.
     */
    public void testW1Y1900Next() {
        Week next = (Week) this.w1Y1900.next();
        assertEquals(this.w2Y1900, next);
    }

    /**
     * Request the week before w52, 9999: it should be week 51, 9999.
     */
    public void testW52Y9999Previous() {
        Week previous = (Week) this.w52Y9999.previous();
        assertEquals(this.w51Y9999, previous);
    }

    /**
     * Request the week after w52, 9999: it should be <code>null</code>.
     */
    public void testW52Y9999Next() {
        Week next = (Week) this.w52Y9999.next();
        assertNull(next);
    }

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

        Week w1 = new Week(24, 1999);
        Week w2 = null;

        try {
            ByteArrayOutputStream buffer = new ByteArrayOutputStream();
            ObjectOutput out = new ObjectOutputStream(buffer);
            out.writeObject(w1);
            out.close();

            ObjectInput in = new ObjectInputStream(
                new ByteArrayInputStream(buffer.toByteArray())
            );
            w2 = (Week) in.readObject();
            in.close();
        }
        catch (Exception e) {
            System.out.println(e.toString());
        }
        assertEquals(w1, w2);

    }
    
    /**
     * Two objects that are equal are required to return the same hashCode. 
     */
    public void testHashcode() {
        Week w1 = new Week(2, 2003);
        Week w2 = new Week(2, 2003);
        assertTrue(w1.equals(w2));
        int h1 = w1.hashCode();
        int h2 = w2.hashCode();
        assertEquals(h1, h2);
    }
    
    /**
     * The {@link Week} class is immutable, so should not be {@link Cloneable}.
     */
    public void testNotCloneable() {
        Week w = new Week(1, 1999);
        assertFalse(w instanceof Cloneable);
    }
    
    /**
     * The first week in 2005 should span the range:
     * 
     * TimeZone         | Start Millis  | End Millis    | Start Date  | End Date
     * -----------------+---------------+---------------+-------------+------------
     * Europe/London    | 1104710400000 | 1105315199999 |  3-Jan-2005 | 9-Jan-2005
     * Europe/Paris     | 1104706800000 | 1105311599999 |  3-Jan-2005 | 2-Jan-2005
     * America/New_York | 1104037200000 | 1104641999999 | 26-Dec-2004 | 1-Jan-2005
     * 
     * In London and Paris, Monday is the first day of the week, while in the US it is
     * Sunday.
     * 
     * Previously, we were using these values, but see Java Bug ID 4960215:
     * 
     * TimeZone         | Start Millis  | End Millis    | Start Date  | End Date
     * -----------------+---------------+---------------+-------------+------------
     * Europe/London    | 1104105600000 | 1104710399999 | 27-Dec-2004 | 2-Jan-2005
     * Europe/Paris     | 1104102000000 | 1104706799999 | 27-Dec-2004 | 2-Jan-2005
     * America/New_York | 1104037200000 | 1104641999999 | 26-Dec-2004 | 1-Jan-2005
     */
    public void testWeek12005() {
        Week w1 = new Week(1, 2005);
        Calendar c1 = Calendar.getInstance(
            TimeZone.getTimeZone("Europe/London"), Locale.UK
        );
        c1.setMinimalDaysInFirstWeek(4);  // see Java Bug ID 4960215
        assertEquals(1104710400000L, w1.getFirstMillisecond(c1));
        assertEquals(1105315199999L, w1.getLastMillisecond(c1));
        Calendar c2 = Calendar.getInstance(
            TimeZone.getTimeZone("Europe/Paris"), Locale.FRANCE
        );
        c2.setMinimalDaysInFirstWeek(4);  // see Java Bug ID 4960215
        assertEquals(1104706800000L, w1.getFirstMillisecond(c2));
        assertEquals(1105311599999L, w1.getLastMillisecond(c2));
        Calendar c3 = Calendar.getInstance(
            TimeZone.getTimeZone("America/New_York"), Locale.US
        );
        assertEquals(1104037200000L, w1.getFirstMillisecond(c3));
        assertEquals(1104641999999L, w1.getLastMillisecond(c3));   
    }

    /**
     * The 53rd week in 2004 in London and Paris should span the range:
     * 
     * TimeZone         | Start Millis  | End Millis    | Start Date  | End Date
     * -----------------+---------------+---------------+-------------+------------
     * Europe/London    | 1104105600000 | 1104710399999 | 27-Dec-2004 | 02-Jan-2005
     * Europe/Paris     | 1104102000000 | 1104706799999 | 27-Dec-2004 | 02-Jan-2005
     *
     * The 53rd week in 2005 in New York should span the range:
     * 
     * TimeZone         | Start Millis  | End Millis    | Start Date  | End Date
     * -----------------+---------------+---------------+-------------+------------
     * America/New_York | 1135486800000 | 1136091599999 | 25-Dec-2005 | 31-Dec-2005
     * 
     * In London and Paris, Monday is the first day of the week, while in the US it is
     * Sunday.
     */
    public void testWeek532005() {
        Week w1 = new Week(53, 2004);
        Calendar c1 = Calendar.getInstance(
            TimeZone.getTimeZone("Europe/London"), Locale.UK
        );
        c1.setMinimalDaysInFirstWeek(4);  // see Java Bug ID 4960215
        assertEquals(1104105600000L, w1.getFirstMillisecond(c1));
        assertEquals(1104710399999L, w1.getLastMillisecond(c1));
        Calendar c2 = Calendar.getInstance(
            TimeZone.getTimeZone("Europe/Paris"), Locale.FRANCE
        );
        c2.setMinimalDaysInFirstWeek(4);  // see Java Bug ID 4960215
        assertEquals(1104102000000L, w1.getFirstMillisecond(c2));
        assertEquals(1104706799999L, w1.getLastMillisecond(c2));
        w1 = new Week(53, 2005);
        Calendar c3 = Calendar.getInstance(
            TimeZone.getTimeZone("America/New_York"), Locale.US
        );
        assertEquals(1135486800000L, w1.getFirstMillisecond(c3));
        assertEquals(1136091599999L, w1.getLastMillisecond(c3));   
    }

}