Java tutorial
/* =========================================================== * JFreeChart : a free chart library for the Java(tm) platform * =========================================================== * * (C) Copyright 2000-2013, 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.] * * ------------ * DayTest.java * ------------ * (C) Copyright 2001-2013, by Object Refinery Limited. * * Original Author: David Gilbert (for Object Refinery Limited); * Contributor(s): -; * * 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); * 03-Oct-2006 : Added testGetSerialIndex() (DG); * 11-Jul-2007 : Fixed bad time zone assumption (DG); * */ package org.jfree.data.time; import static org.junit.Assert.assertTrue; import static org.junit.Assert.assertFalse; import static org.junit.Assert.assertEquals; import static org.junit.Assert.assertNull; import java.text.ParseException; import java.text.SimpleDateFormat; import java.util.Calendar; import java.util.Date; import java.util.GregorianCalendar; import java.util.Locale; import java.util.TimeZone; import org.jfree.chart.TestUtilities; import org.jfree.date.MonthConstants; import org.junit.Test; /** * Tests for the {@link Day} class. */ public class DayTest { /** * Check that a Day instance is equal to itself. * * SourceForge Bug ID: 558850. */ @Test public void testEqualsSelf() { Day day = new Day(); assertTrue(day.equals(day)); } /** * Tests the equals method. */ @Test 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. */ @Test public void testDateConstructor1() { TimeZone zone = TimeZone.getTimeZone("GMT"); Locale locale = Locale.UK; Day d1 = new Day(new Date(1078099199999L), zone, locale); Day d2 = new Day(new Date(1078099200000L), zone, locale); 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. */ @Test public void testDateConstructor2() { TimeZone zone = TimeZone.getTimeZone("Europe/Helsinki"); Locale locale = Locale.getDefault(); // locale shouldn't matter here Day d1 = new Day(new Date(1078091999999L), zone, locale); Day d2 = new Day(new Date(1078092000000L), zone, locale); 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. */ @Test 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. */ @Test 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. */ @Test 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. */ @Test 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. */ @Test 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. */ @Test public void testSerialization() { Day d1 = new Day(15, 4, 2000); Day d2 = (Day) TestUtilities.serialised(d1); assertEquals(d1, d2); } /** * Two objects that are equal are required to return the same hashCode. */ @Test 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}. */ @Test public void testNotCloneable() { Day d = new Day(1, 2, 2003); assertFalse(d instanceof Cloneable); } /** * Some checks for the getSerialIndex() method. */ @Test public void testGetSerialIndex() { Day d = new Day(1, 1, 1900); assertEquals(2, d.getSerialIndex()); d = new Day(15, 4, 2000); assertEquals(36631, d.getSerialIndex()); } /** * 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")); Day d = new Day(1, 3, 1970); assertEquals(5094000000L, d.getFirstMillisecond()); Locale.setDefault(saved); TimeZone.setDefault(savedZone); } /** * Some checks for the getFirstMillisecond(TimeZone) method. */ @Test public void testGetFirstMillisecondWithTimeZone() { Day d = new Day(26, 4, 1950); TimeZone zone = TimeZone.getTimeZone("America/Los_Angeles"); assertEquals(-621187200000L, d.getFirstMillisecond(zone)); // try null calendar boolean pass = false; try { d.getFirstMillisecond((TimeZone) null); } catch (NullPointerException e) { pass = true; } assertTrue(pass); } /** * Some checks for the getFirstMillisecond(TimeZone) method. */ @Test public void testGetFirstMillisecondWithCalendar() { Day d = new Day(1, 12, 2001); GregorianCalendar calendar = new GregorianCalendar(Locale.GERMANY); calendar.setTimeZone(TimeZone.getTimeZone("Europe/Frankfurt")); assertEquals(1007164800000L, d.getFirstMillisecond(calendar)); // try null calendar boolean pass = false; try { d.getFirstMillisecond((Calendar) null); } catch (NullPointerException e) { pass = true; } assertTrue(pass); } /** * 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")); Day d = new Day(1, 1, 1970); assertEquals(82799999L, d.getLastMillisecond()); Locale.setDefault(saved); TimeZone.setDefault(savedZone); } /** * Some checks for the getLastMillisecond(TimeZone) method. */ @Test public void testGetLastMillisecondWithTimeZone() { Day d = new Day(1, 2, 1950); TimeZone zone = TimeZone.getTimeZone("America/Los_Angeles"); assertEquals(-628358400001L, d.getLastMillisecond(zone)); // try null calendar boolean pass = false; try { d.getLastMillisecond((TimeZone) null); } catch (NullPointerException e) { pass = true; } assertTrue(pass); } /** * Some checks for the getLastMillisecond(TimeZone) method. */ @Test public void testGetLastMillisecondWithCalendar() { Day d = new Day(4, 5, 2001); Calendar calendar = Calendar.getInstance(TimeZone.getTimeZone("Europe/London"), Locale.UK); assertEquals(989017199999L, d.getLastMillisecond(calendar)); // try null calendar boolean pass = false; try { d.getLastMillisecond((Calendar) null); } catch (NullPointerException e) { pass = true; } assertTrue(pass); } /** * Some checks for the testNext() method. */ @Test public void testNext() { Day d = new Day(25, 12, 2000); d = (Day) d.next(); assertEquals(2000, d.getYear()); assertEquals(12, d.getMonth()); assertEquals(26, d.getDayOfMonth()); d = new Day(31, 12, 9999); assertNull(d.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.NOVEMBER, 3, 0, 0, 0); cal.set(Calendar.MILLISECOND, 0); Day d = new Day(3, 11, 2006); assertEquals(cal.getTime(), d.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(1900, Calendar.JANUARY, 1, 23, 59, 59); cal.set(Calendar.MILLISECOND, 999); Day d = new Day(1, 1, 1900); assertEquals(cal.getTime(), d.getEnd()); Locale.setDefault(saved); } }