/* ===========================================================
 * JFreeChart : a free chart library for the Java(tm) platform
 * ===========================================================
 *
 * (C) Copyright 2000-2012, 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.
 *
 * [Oracle and Java are registered trademarks of Oracle and/or its affiliates. 
 * Other names may be trademarks of their respective owners.]
 *
 * --------------
 * YearTests.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);
 * 19-Mar-2002 : Added tests for constructor that uses java.util.Date to ensure
 *               it is consistent with the getStart() and getEnd() methods (DG);
 * 17-Oct-2002 : Fixed errors reported by Checkstyle (DG);
 * 13-Mar-2003 : Added serialization test (DG);
 * 11-Jan-2005 : Added test for non-clonability (DG);
 * 05-Oct-2006 : Added some new tests (DG);
 * 11-Jul-2007 : Fixed bad time zone assumption (DG);
 *
 */

package org.jfree.data.time;

import org.junit.Test;

import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
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 static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertNull;
import static org.junit.Assert.fail;

/**
 * Tests for the {@link Year} class.
 */
public class YearTest  {


    /**
     * Check that a Year instance is equal to itself.
     *
     * SourceForge Bug ID: 558850.
     */
    @Test
    public void testEqualsSelf() {
        Year year = new Year();
        assertEquals(year, year);
    }

    /**
     * Tests the equals method.
     */
    @Test
    public void testEquals() {
        Year year1 = new Year(2002);
        Year year2 = new Year(2002);
        assertEquals(year1, year2);

        year1 = new Year(1999);
        assertFalse(year1.equals(year2));
        year2 = new Year(1999);
        assertEquals(year1, year2);
    }

    /**
     * In GMT, the end of 2001 is java.util.Date(1009843199999L).  Use this to
     * check the year constructor.
     */
    @Test
    public void testDateConstructor1() {

        TimeZone zone = TimeZone.getTimeZone("GMT");
        Calendar c = new GregorianCalendar(zone);
        Date d1 = new Date(1009843199999L);
        Date d2 = new Date(1009843200000L);
        Year y1 = new Year(d1, zone, Locale.getDefault());
        Year y2 = new Year(d2, zone, Locale.getDefault());

        assertEquals(2001, y1.getYear());
        assertEquals(1009843199999L, y1.getLastMillisecond(c));

        assertEquals(2002, y2.getYear());
        assertEquals(1009843200000L, y2.getFirstMillisecond(c));

    }

    /**
     * In Los Angeles, the end of 2001 is java.util.Date(1009871999999L).  Use
     * this to check the year constructor.
     */
    @Test
    public void testDateConstructor2() {

        TimeZone zone = TimeZone.getTimeZone("America/Los_Angeles");
        Calendar c = new GregorianCalendar(zone);
        Year y1 = new Year(new Date(1009871999999L), zone, Locale.getDefault());
        Year y2 = new Year(new Date(1009872000000L), zone, Locale.getDefault());

        assertEquals(2001, y1.getYear());
        assertEquals(1009871999999L, y1.getLastMillisecond(c));

        assertEquals(2002, y2.getYear());
        assertEquals(1009872000000L, y2.getFirstMillisecond(c));

    }

    /**
     * Set up a year equal to 1900.  Request the previous year, it should be
     * null.
     */
    @Test
    public void testMinuss9999Previous() {
        Year current = new Year(-9999);
        Year previous = (Year) current.previous();
        assertNull(previous);
    }

    /**
     * Set up a year equal to 1900.  Request the next year, it should be 1901.
     */
    @Test
    public void test1900Next() {
        Year current = new Year(1900);
        Year next = (Year) current.next();
        assertEquals(1901, next.getYear());
    }

    /**
     * Set up a year equal to 9999.  Request the previous year, it should be
     * 9998.
     */
    @Test
    public void test9999Previous() {
        Year current = new Year(9999);
        Year previous = (Year) current.previous();
        assertEquals(9998, previous.getYear());
    }

    /**
     * Set up a year equal to 9999.  Request the next year, it should be null.
     */
    @Test
    public void test9999Next() {
        Year current = new Year(9999);
        Year next = (Year) current.next();
        assertNull(next);
    }

    /**
     * Tests the year string parser.
     */
    @Test
    public void testParseYear() {


        // test 1...
        Year year = Year.parseYear("2000");

        assertEquals(2000, year.getYear());

        // test 2...
        year = Year.parseYear(" 2001 ");

        assertEquals(2001, year.getYear());

        // test 3...
        year = Year.parseYear("99");
        assertEquals(99, year.getYear());

    }

    /**
     * Serialize an instance, restore it, and check for equality.
     */
    @Test
    public void testSerialization() throws IOException, ClassNotFoundException {

        Year y1 = new Year(1999);

            ByteArrayOutputStream buffer = new ByteArrayOutputStream();
            ObjectOutput out = new ObjectOutputStream(buffer);
            out.writeObject(y1);
            out.close();

            ObjectInput in = new ObjectInputStream(
                new ByteArrayInputStream(buffer.toByteArray())
            );
        Year y2 = (Year) in.readObject();
            in.close();

        assertEquals(y1, y2);

    }

    /**
     * The {@link Year} class is immutable, so should not be {@link Cloneable}.
     */
    @Test
    public void testNotCloneable() {
        Year y = new Year(1999);
        assertFalse(y instanceof Cloneable);
    }

    /**
     * Two objects that are equal are required to return the same hashCode.
     */
    @Test
    public void testHashcode() {
        Year y1 = new Year(1988);
        Year y2 = new Year(1988);
        assertEquals(y1, y2);
        int h1 = y1.hashCode();
        int h2 = y2.hashCode();
        assertEquals(h1, h2);
    }

    /**
     * Some checks for the getFirstMillisecond() method.
     */
    @Test
    public void testGetFirstMillisecond() {
        Locale saved = Locale.getDefault();
        Locale.setDefault(Locale.UK);
        TimeZone savedZone = TimeZone.getDefault();
        TimeZone.setDefault(TimeZone.getTimeZone("Europe/London"));
        Year y = new Year(1970);
        // TODO: Check this result...
        assertEquals(-3600000L, y.getFirstMillisecond());
        Locale.setDefault(saved);
        TimeZone.setDefault(savedZone);
    }

    /**
     * Some checks for the getFirstMillisecond(TimeZone) method.
     */
    @Test
    public void testGetFirstMillisecondWithTimeZone() {
        Year y = new Year(1950);
        TimeZone zone = TimeZone.getTimeZone("America/Los_Angeles");
        Calendar c = new GregorianCalendar(zone);
        assertEquals(-631123200000L, y.getFirstMillisecond(c));

        // try null calendar
        try {
            y.getFirstMillisecond(null);
            fail("NullPointerException should have been thrown");
        }
        catch (NullPointerException e) {
            //we expect to go in here
        }
    }

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

        // try null calendar
        try {
            y.getFirstMillisecond(null);
            fail("NullPointerException should have been thrown");
        }
        catch (NullPointerException e) {
            // we expect to go in here
        }
    }

    /**
     * Some checks for the getLastMillisecond() method.
     */
    @Test
    public void testGetLastMillisecond() {
        Locale saved = Locale.getDefault();
        Locale.setDefault(Locale.UK);
        TimeZone savedZone = TimeZone.getDefault();
        TimeZone.setDefault(TimeZone.getTimeZone("Europe/London"));
        Year y = new Year(1970);
        // TODO: Check this result...
        assertEquals(31532399999L, y.getLastMillisecond());
        Locale.setDefault(saved);
        TimeZone.setDefault(savedZone);
    }

    /**
     * Some checks for the getLastMillisecond(TimeZone) method.
     */
    @Test
    public void testGetLastMillisecondWithTimeZone() {
        Year y = new Year(1950);
        TimeZone zone = TimeZone.getTimeZone("America/Los_Angeles");
        Calendar c = new GregorianCalendar(zone);

        assertEquals(-599587200001L, y.getLastMillisecond(c));

        // try null calendar
        try {
            y.getLastMillisecond(null);
            fail("NullPointerException should have been thrown");
        }
        catch (NullPointerException e) {
            //we expect to go in here
        }
    }

    /**
     * Some checks for the getLastMillisecond(TimeZone) method.
     */
    @Test
    public void testGetLastMillisecondWithCalendar() {
        Year y = new Year(2001);
        GregorianCalendar calendar = new GregorianCalendar(Locale.GERMANY);
        calendar.setTimeZone(TimeZone.getTimeZone("Europe/Frankfurt"));
        assertEquals(1009843199999L, y.getLastMillisecond(calendar));

        // try null calendar
        try {
            y.getLastMillisecond(null);
            fail("NullPointerException should have been thrown");
        }
        catch (NullPointerException e) {
            //we expect to go in here
        }
    }

    /**
     * Some checks for the getSerialIndex() method.
     */
    @Test
    public void testGetSerialIndex() {
        Year y = new Year(2000);
        assertEquals(2000L, y.getSerialIndex());
    }

    /**
     * Some checks for the testNext() method.
     */
    @Test
    public void testNext() {
        Year y = new Year(2000);
        y = (Year) y.next();
        assertEquals(2001, y.getYear());
        y = new Year(9999);
        assertNull(y.next());
    }

    /**
     * Some checks for the getStart() method.
     */
    @Test
    public void testGetStart() {
        Locale saved = Locale.getDefault();
        Locale.setDefault(Locale.ITALY);
        Calendar cal = Calendar.getInstance(Locale.ITALY);
        cal.set(2006, Calendar.JANUARY, 1, 0, 0, 0);
        cal.set(Calendar.MILLISECOND, 0);
        Year y = new Year(2006);
        assertEquals(cal.getTime(), y.getStart());
        Locale.setDefault(saved);
    }

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

}
