1 /*
   2  * Copyright (c) 2021, 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
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  23 
  24 /*
  25  * @test
  26  * @bug 8073446 8262110
  27  * @summary Tests DST related beyond the year 2037
  28  * @run testng Beyond2037
  29  */
  30 
  31 import java.text.SimpleDateFormat;
  32 import java.util.TimeZone;
  33 
  34 import org.testng.annotations.DataProvider;
  35 import org.testng.annotations.Test;
  36 import static org.testng.Assert.assertEquals;
  37 
  38 @Test
  39 public class Beyond2037 {
  40 
  41     @DataProvider
  42     Object[][] dstTransition() {
  43         return new Object[][] {
  44             {"2037/03/08 01:59:59:999", "2037/03/08 01:59:59:999"},
  45             {"2037/03/08 02:00:00:000", "2037/03/08 03:00:00:000"},
  46             {"2038/03/14 01:59:59:999", "2038/03/14 01:59:59:999"},
  47             {"2038/03/14 02:00:00:000", "2038/03/14 03:00:00:000"},
  48             {"2099/03/08 01:59:59:999", "2099/03/08 01:59:59:999"},
  49             {"2099/03/08 02:00:00:000", "2099/03/08 03:00:00:000"},
  50             {"2100/03/14 01:59:59:999", "2100/03/14 01:59:59:999"},
  51             {"2100/03/14 02:00:00:000", "2100/03/14 03:00:00:000"},
  52             {"8000/03/12 01:59:59:999", "8000/03/12 01:59:59:999"},
  53             {"8000/03/12 02:00:00:000", "8000/03/12 03:00:00:000"},
  54         };
  55     }
  56 
  57     @Test(dataProvider="dstTransition")
  58     public void testDstTransition(String source, String expected) throws Exception {
  59         var timeZone = TimeZone.getTimeZone("America/New_York");
  60         var sdf = new SimpleDateFormat("yyyy/MM/dd HH:mm:ss:SSS" );
  61         sdf.setTimeZone(timeZone);
  62         assertEquals(sdf.format(sdf.parse(source)), expected);
  63     }
  64 
  65     @Test
  66     public void testGetOffset() throws Exception {
  67         var timeZone = TimeZone.getTimeZone("PST8PDT");
  68         var df = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
  69         df.setTimeZone(timeZone);
  70         var tMilli = df.parse("7681-03-09 03:20:49").getTime();
  71         assertEquals(timeZone.getOffset(tMilli), -25200000);
  72     }
  73 }