1 /*
   2  * Copyright (c) 2002, 2016, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  */
  23 
  24 /*
  25  * @test
  26  * @bug 4514831
  27  * @summary Confirm that GregorianCalendar.roll() works properly during transition from Daylight Saving Time to Standard Time.
  28  */
  29 
  30 import java.util.*;
  31 
  32 public class bug4514831 {
  33 
  34     public static void main(String[] args) {
  35         Locale savedLocale = Locale.getDefault();
  36         TimeZone savedTimeZone = TimeZone.getDefault();
  37         boolean err = false;
  38 
  39         String golden_data1 ="27-28 28-29 29-30 30-31 31-1 1-2 2-3 ";
  40         String golden_data2 ="27-28 28-29 29-30 30-31 31-25 25-26 26-27 ";
  41         String golden_data3 ="1-8 8-15 15-22 22-29 29-1 1-8 8-15 ";
  42 
  43         try {
  44             Locale.setDefault(Locale.US);
  45             TimeZone.setDefault(TimeZone.getTimeZone("US/Pacific"));
  46 
  47             String test_roll = "";
  48             GregorianCalendar c_roll = new GregorianCalendar(2001, Calendar.OCTOBER, 27);
  49             for (int i=0; i < 7; i++) {
  50                 test_roll += c_roll.get(c_roll.DAY_OF_MONTH) + "-";
  51                 c_roll.roll(c_roll.DAY_OF_YEAR, true);
  52                 test_roll += c_roll.get(c_roll.DAY_OF_MONTH) + " ";
  53             }
  54             if (!test_roll.equals(golden_data1)) {
  55                 err = true;
  56                 System.err.println("Wrong roll(DAY_OF_YEAR) transition: got "+
  57                                    test_roll + "expected " + golden_data1);
  58             }
  59 
  60             test_roll = "";
  61             c_roll = new GregorianCalendar(2001, Calendar.OCTOBER, 27);
  62             c_roll.setFirstDayOfWeek(Calendar.THURSDAY);
  63             for (int i=0; i < 7; i++) {
  64                 test_roll += c_roll.get(c_roll.DAY_OF_MONTH) + "-";
  65                 c_roll.roll(c_roll.DAY_OF_WEEK, true);
  66                 test_roll += c_roll.get(c_roll.DAY_OF_MONTH) + " ";
  67             }
  68             if (!test_roll.equals(golden_data2)) {
  69                 err = true;
  70                 System.err.println("Wrong roll(DAY_OF_WEEK) transition: got "+
  71                                    test_roll + "expected " + golden_data2);
  72             }
  73 
  74             test_roll = "";
  75             c_roll = new GregorianCalendar(2001, Calendar.OCTOBER, 1);
  76             for (int i=0; i < 7; i++) {
  77                 test_roll += c_roll.get(c_roll.DAY_OF_MONTH) + "-";
  78                 c_roll.roll(c_roll.DAY_OF_WEEK_IN_MONTH, true);
  79                 test_roll += c_roll.get(c_roll.DAY_OF_MONTH) + " ";
  80             }
  81             if (!test_roll.equals(golden_data3)) {
  82                 err = true;
  83                 System.err.println("Wrong roll(DAY_OF_WEEK_IN_MONTH) transition: got "+
  84                                    test_roll + "expected " + golden_data3);
  85             }
  86         } finally {
  87             Locale.setDefault(savedLocale);
  88             TimeZone.setDefault(savedTimeZone);
  89         }
  90 
  91         if (err) {
  92             throw new RuntimeException("Wrong roll() transition");
  93         }
  94     }
  95 }