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.] * * -------------- * MonthTest.java * -------------- * (C) Copyright 2001-2013, 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; 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.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.Before; import org.junit.Test; /** * Tests for the {@link Month} class. */ public class MonthTest { /** A month. */ private Month jan1900; /** A month. */ private Month feb1900; /** A month. */ private Month nov9999; /** A month. */ private Month dec9999; /** * Common test setup. */ @Before public 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. */ @Test public void testEqualsSelf() { Month month = new Month(); assertTrue(month.equals(month)); } /** * Tests the equals method. */ @Test 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. */ @Test 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. */ @Test 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. */ @Test 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. */ @Test 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. */ @Test 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. */ @Test public void testDec9999Next() { Month next = (Month) this.dec9999.next(); assertNull(next); } /** * Tests the string parsing code... */ @Test 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. */ @Test public void testSerialization() { Month m1 = new Month(12, 1999); Month m2 = (Month) TestUtilities.serialised(m1); assertEquals(m1, m2); } /** * Two objects that are equal are required to return the same hashCode. */ @Test 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}. */ @Test public void testNotCloneable() { Month m = new Month(2, 2003); assertFalse(m instanceof Cloneable); } /** * 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")); Month m = new Month(3, 1970); assertEquals(5094000000L, m.getFirstMillisecond()); Locale.setDefault(saved); TimeZone.setDefault(savedZone); } /** * Some checks for the getFirstMillisecond(TimeZone) method. */ @Test 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. */ @Test 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. */ @Test 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. */ @Test 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. */ @Test 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. */ @Test 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. */ @Test 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. */ @Test 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. */ @Test 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); } }