1 /*
2 * Copyright (c) 2019, 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 import static org.testng.Assert.assertEquals;
25
26 import java.time.Instant;
27 import java.time.LocalDate;
28 import java.time.LocalTime;
29 import java.time.ZonedDateTime;
30 import java.time.ZoneId;
31 import java.util.Date;
32 import java.util.TimeZone;
33
34 import org.testng.annotations.Test;
35 import org.testng.annotations.DataProvider;
36 import static org.testng.Assert.assertEquals;
37
38 /**
39 * @test
40 * @bug 8212970
41 * @summary Test whether the savings are positive in time zones that have
42 * negative savings in the source TZ files.
43 * @run testng NegativeDSTTest
44 */
45 @Test
46 public class NegativeDSTTest {
47
48 private static final TimeZone DUBLIN = TimeZone.getTimeZone("Europe/Dublin");
49 private static final TimeZone PRAGUE = TimeZone.getTimeZone("Europe/Prague");
50 private static final TimeZone WINDHOEK = TimeZone.getTimeZone("Africa/Windhoek");
51 private static final TimeZone CASABLANCA = TimeZone.getTimeZone("Africa/Casablanca");
52 private static final int ONE_HOUR = 3600_000;
53
54 @DataProvider
55 private Object[][] negativeDST () {
56 return new Object[][] {
57 // TimeZone, localDate, offset, isDaylightSavings
58 // Europe/Dublin for the Rule "Eire"
59 {DUBLIN, LocalDate.of(1970, 6, 23), ONE_HOUR, true},
60 {DUBLIN, LocalDate.of(1971, 6, 23), ONE_HOUR, true},
61 {DUBLIN, LocalDate.of(1971, 11, 1), 0, false},
62 {DUBLIN, LocalDate.of(2019, 6, 23), ONE_HOUR, true},
63 {DUBLIN, LocalDate.of(2019, 12, 23), 0, false},
64
65 // Europe/Prague which contains fixed negative savings (not a named Rule)
66 {PRAGUE, LocalDate.of(1946, 9, 30), 2 * ONE_HOUR, true},
67 {PRAGUE, LocalDate.of(1946, 10, 10), ONE_HOUR, false},
68 {PRAGUE, LocalDate.of(1946, 12, 3), 0, false},
69 {PRAGUE, LocalDate.of(1947, 2, 25), ONE_HOUR, false},
70 {PRAGUE, LocalDate.of(1947, 4, 30), 2 * ONE_HOUR, true},
71
72 // Africa/Windhoek for the Rule "Namibia"
73 {WINDHOEK, LocalDate.of(1994, 3, 23), ONE_HOUR, false},
74 {WINDHOEK, LocalDate.of(2016, 9, 23), 2 * ONE_HOUR, true},
75
76 // Africa/Casablanca for the Rule "Morocco" Defines negative DST till 2037 as of 2019a.
77 {CASABLANCA, LocalDate.of(1939, 9, 13), ONE_HOUR, true},
78 {CASABLANCA, LocalDate.of(1939, 11, 20), 0, false},
79 {CASABLANCA, LocalDate.of(2018, 6, 18), ONE_HOUR, true},
80 {CASABLANCA, LocalDate.of(2019, 1, 1), ONE_HOUR, true},
81 {CASABLANCA, LocalDate.of(2019, 5, 6), 0, false},
82 {CASABLANCA, LocalDate.of(2037, 10, 5), 0, false},
83 {CASABLANCA, LocalDate.of(2037, 11, 16), ONE_HOUR, true},
84 {CASABLANCA, LocalDate.of(2038, 11, 1), ONE_HOUR, true},
85 };
86 }
87
88 @Test(dataProvider="negativeDST")
89 public void test_NegativeDST(TimeZone tz, LocalDate ld, int offset, boolean isDST) {
90 Date d = Date.from(Instant.from(ZonedDateTime.of(ld, LocalTime.MIN, tz.toZoneId())));
91 assertEquals(tz.getOffset(d.getTime()), offset);
92 assertEquals(tz.inDaylightTime(d), isDST);
93 }
94 }