| /* |
| * Copyright (C) 2010 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package libcore.java.util; |
| |
| import junit.framework.TestCase; |
| |
| import java.text.SimpleDateFormat; |
| import java.time.ZoneId; |
| import java.util.Calendar; |
| import java.util.Date; |
| import java.util.Locale; |
| import java.util.SimpleTimeZone; |
| import java.util.TimeZone; |
| |
| public class TimeZoneTest extends TestCase { |
| // http://code.google.com/p/android/issues/detail?id=877 |
| public void test_useDaylightTime_Taiwan() { |
| TimeZone asiaTaipei = TimeZone.getTimeZone("Asia/Taipei"); |
| assertFalse("Taiwan doesn't use DST", asiaTaipei.useDaylightTime()); |
| } |
| |
| // http://code.google.com/p/android/issues/detail?id=8016 |
| public void test_useDaylightTime_Iceland() { |
| TimeZone atlanticReykjavik = TimeZone.getTimeZone("Atlantic/Reykjavik"); |
| assertFalse("Reykjavik doesn't use DST", atlanticReykjavik.useDaylightTime()); |
| } |
| |
| // http://code.google.com/p/android/issues/detail?id=11542 |
| public void test_clone_SimpleTimeZone() { |
| SimpleTimeZone stz = new SimpleTimeZone(21600000, "Central Standard Time"); |
| stz.setStartYear(1000); |
| stz.inDaylightTime(new Date()); |
| stz.clone(); |
| } |
| |
| // http://b/3049014 |
| public void testCustomTimeZoneDisplayNames() { |
| TimeZone tz0001 = new SimpleTimeZone(60000, "ONE MINUTE"); |
| TimeZone tz0130 = new SimpleTimeZone(5400000, "ONE HOUR, THIRTY"); |
| TimeZone tzMinus0130 = new SimpleTimeZone(-5400000, "NEG ONE HOUR, THIRTY"); |
| assertEquals("GMT+00:01", tz0001.getDisplayName(false, TimeZone.SHORT, Locale.US)); |
| assertEquals("GMT+01:30", tz0130.getDisplayName(false, TimeZone.SHORT, Locale.US)); |
| assertEquals("GMT-01:30", tzMinus0130.getDisplayName(false, TimeZone.SHORT, Locale.US)); |
| } |
| |
| // http://code.google.com/p/android/issues/detail?id=14395 |
| public void testPreHistoricInDaylightTime() { |
| // A replacement for testPreHistoricInDaylightTime_old() using a zone that lacks an |
| // explicit transition at Integer.MIN_VALUE with zic 2019a and 2019a data. |
| TimeZone tz = TimeZone.getTimeZone("CET"); |
| |
| long firstTransitionTimeMillis = -1693706400000L; // Apr 30, 1916 22:00:00 GMT |
| assertEquals(7200000L, tz.getOffset(firstTransitionTimeMillis)); |
| assertTrue(tz.inDaylightTime(new Date(firstTransitionTimeMillis))); |
| |
| long beforeFirstTransitionTimeMillis = firstTransitionTimeMillis - 1; |
| assertEquals(3600000L, tz.getOffset(beforeFirstTransitionTimeMillis)); |
| assertFalse(tz.inDaylightTime(new Date(beforeFirstTransitionTimeMillis))); |
| } |
| |
| // http://code.google.com/p/android/issues/detail?id=14395 |
| public void testPreHistoricInDaylightTime_old() throws Exception { |
| // Originally this test was intended to assert what happens when the first transition for a |
| // time zone was a "to DST" transition. i.e. that the (implicit) offset / DST state before |
| // the first was treated as a non-DST state. With the latest data this is no longer true. |
| // This regression test has been kept in case that changes again in future and to prove the |
| // behavior has remained consistent. |
| |
| Locale.setDefault(Locale.US); |
| TimeZone tz = TimeZone.getTimeZone("America/Los_Angeles"); |
| TimeZone.setDefault(tz); |
| SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss.SSSZ"); |
| Date date = sdf.parse("1902-11-01T00:00:00.000+0800"); |
| assertEquals(-2119680000000L, date.getTime()); |
| assertEquals(-28800000, tz.getOffset(date.getTime())); |
| assertFalse(tz.inDaylightTime(date)); |
| assertEquals("Fri Oct 31 08:00:00 PST 1902", date.toString()); |
| assertEquals("31 Oct 1902 16:00:00 GMT", date.toGMTString()); |
| // For zic versions <= 2014b with 32-bit data, this would be before the first transition. |
| date = sdf.parse("1902-06-01T00:00:00.000+0800"); |
| assertEquals(-28800000, tz.getOffset(date.getTime())); |
| assertFalse(tz.inDaylightTime(date)); |
| } |
| |
| public void testGetDisplayNameShort_nonHourOffsets() { |
| TimeZone iranTz = TimeZone.getTimeZone("Asia/Tehran"); |
| assertEquals("GMT+03:30", iranTz.getDisplayName(false, TimeZone.SHORT, Locale.UK)); |
| assertEquals("GMT+04:30", iranTz.getDisplayName(true, TimeZone.SHORT, Locale.UK)); |
| } |
| |
| public void testPreHistoricOffsets() throws Exception { |
| // Note: This test changed after P to account for previously incorrect handling of |
| // prehistoric offsets. http://b/118835133 |
| // "Africa/Bissau" has just a few known transitions: |
| // Transition time : Offset : DST / non-DST |
| // <Before first transition>[1]: -01:02:20 : non-DST |
| // 1912-01-01 01:00:00 GMT : -01:00:00 : non-DST |
| // 1975-01-01 01:00:00 GMT : 00:00:00 : non-DST |
| // |
| // [1] This transition can be implicit or explicit depending on the version of zic used to |
| // generate the data. When implicit, the first non-DST type defn should be used. |
| TimeZone tz = TimeZone.getTimeZone("Africa/Bissau"); |
| |
| // Integer.MIN_VALUE seconds should not be significant for TimeZone on Android since it |
| // switched to using 64-bit data but we try a time before to make sure that is true. |
| assertNonDaylightOffset(-3740, parseIsoTime("1900-01-01T00:00:00.0+0000"), tz); |
| |
| // Time before 1912-01-01 01:00:00 but after Integer.MIN_VALUE. |
| assertNonDaylightOffset(-3740, parseIsoTime("1911-01-01T00:00:00.0+0000"), tz); |
| |
| // Times after 1912-01-01 01:00:00 should use that transition. |
| assertNonDaylightOffset(-3600, parseIsoTime("1912-01-01T12:00:00.0-0100"), tz); |
| |
| // Times after 1975-01-01 01:00:00 should use that transition. |
| assertNonDaylightOffset(0, parseIsoTime("1980-01-01T00:00:00.0+0000"), tz); |
| } |
| |
| private static void assertNonDaylightOffset( |
| int expectedOffsetSeconds, long epochMillis, TimeZone tz) { |
| assertEquals(expectedOffsetSeconds, tz.getOffset(epochMillis) / 1000); |
| assertFalse(tz.inDaylightTime(new Date(epochMillis))); |
| } |
| |
| /** Returns the millis elapsed since the beginning of the Unix epoch. */ |
| private static long parseIsoTime(String isoTime) throws Exception { |
| SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss.SSSZ"); |
| Date date = sdf.parse(isoTime); |
| return date.getTime(); |
| } |
| |
| public void testMinimalTransitionZones() throws Exception { |
| // Zones with minimal transitions, historical or future, seem ideal for testing. |
| // UTC is also included, although it may be implemented differently from the others. |
| String[] ids = new String[] { "Africa/Bujumbura", "Indian/Cocos", "Pacific/Wake", "UTC" }; |
| for (String id : ids) { |
| TimeZone tz = TimeZone.getTimeZone(id); |
| assertFalse(tz.useDaylightTime()); |
| assertFalse(tz.inDaylightTime(new Date(Integer.MIN_VALUE))); |
| assertFalse(tz.inDaylightTime(new Date(0))); |
| assertFalse(tz.inDaylightTime(new Date(Integer.MAX_VALUE))); |
| int currentOffset = tz.getOffset(new Date(0).getTime()); |
| assertEquals(currentOffset, tz.getOffset(new Date(Integer.MIN_VALUE).getTime())); |
| assertEquals(currentOffset, tz.getOffset(new Date(Integer.MAX_VALUE).getTime())); |
| } |
| } |
| |
| // http://code.google.com/p/android/issues/detail?id=16608 |
| public void testHelsinkiOverflow() throws Exception { |
| long time = 2147483648000L;// Tue, 19 Jan 2038 03:14:08 GMT |
| TimeZone timeZone = TimeZone.getTimeZone("Europe/Helsinki"); |
| long offset = timeZone.getOffset(time); |
| // This might cause us trouble if Europe/Helsinki changes its rules. See the bug for |
| // details of the intent of this test. |
| assertEquals(7200000, offset); |
| } |
| |
| // http://code.google.com/p/android/issues/detail?id=11918 |
| public void testHasSameRules() throws Exception { |
| TimeZone denver = TimeZone.getTimeZone("America/Denver"); |
| TimeZone phoenix = TimeZone.getTimeZone("America/Phoenix"); |
| assertFalse(denver.hasSameRules(phoenix)); |
| } |
| |
| // http://code.google.com/p/android/issues/detail?id=24036 |
| public void testNullId() throws Exception { |
| try { |
| TimeZone.getTimeZone((String) null); |
| fail(); |
| } catch (NullPointerException expected) { |
| } |
| } |
| |
| public void testNullZoneId() throws Exception { |
| try { |
| TimeZone.getTimeZone((ZoneId) null); |
| fail(); |
| } catch (NullPointerException expected) { |
| } |
| } |
| |
| // http://b.corp.google.com/issue?id=6556561 |
| public void testCustomZoneIds() throws Exception { |
| // These are all okay (and equivalent). |
| assertEquals("GMT+05:00", TimeZone.getTimeZone("GMT+05:00").getID()); |
| assertEquals("GMT+05:00", TimeZone.getTimeZone("GMT+5:00").getID()); |
| assertEquals("GMT+05:00", TimeZone.getTimeZone("GMT+0500").getID()); |
| assertEquals("GMT+05:00", TimeZone.getTimeZone("GMT+500").getID()); |
| assertEquals("GMT+05:00", TimeZone.getTimeZone("GMT+5").getID()); |
| // These aren't. |
| assertEquals("GMT", TimeZone.getTimeZone("GMT+5.5").getID()); |
| assertEquals("GMT", TimeZone.getTimeZone("GMT+5:5").getID()); |
| assertEquals("GMT", TimeZone.getTimeZone("GMT+5:0").getID()); |
| assertEquals("GMT", TimeZone.getTimeZone("GMT+5:005").getID()); |
| assertEquals("GMT", TimeZone.getTimeZone("GMT+5:000").getID()); |
| assertEquals("GMT", TimeZone.getTimeZone("GMT+005:00").getID()); |
| assertEquals("GMT", TimeZone.getTimeZone("GMT+05:99").getID()); |
| assertEquals("GMT", TimeZone.getTimeZone("GMT+28:00").getID()); |
| assertEquals("GMT", TimeZone.getTimeZone("GMT+05:00.00").getID()); |
| assertEquals("GMT", TimeZone.getTimeZone("GMT+05:00:00").getID()); |
| assertEquals("GMT", TimeZone.getTimeZone("GMT+5:").getID()); |
| assertEquals("GMT", TimeZone.getTimeZone("GMT+junk").getID()); |
| assertEquals("GMT", TimeZone.getTimeZone("GMT+5junk").getID()); |
| assertEquals("GMT", TimeZone.getTimeZone("GMT+5:junk").getID()); |
| assertEquals("GMT", TimeZone.getTimeZone("GMT+5:00junk").getID()); |
| assertEquals("GMT", TimeZone.getTimeZone("junkGMT+5:00").getID()); |
| assertEquals("GMT", TimeZone.getTimeZone("junk").getID()); |
| assertEquals("GMT", TimeZone.getTimeZone("gmt+5:00").getID()); |
| } |
| |
| public void test_getDSTSavings() throws Exception { |
| assertEquals(0, TimeZone.getTimeZone("UTC").getDSTSavings()); |
| assertEquals(3600000, TimeZone.getTimeZone("America/Los_Angeles").getDSTSavings()); |
| assertEquals(1800000, TimeZone.getTimeZone("Australia/Lord_Howe").getDSTSavings()); |
| } |
| |
| public void testSimpleTimeZoneDoesNotCallOverrideableMethodsFromConstructor() { |
| new SimpleTimeZone(0, "X", Calendar.MARCH, 1, 1, 1, Calendar.SEPTEMBER, 1, 1, 1) { |
| @Override public void setStartRule(int m, int d, int dow, int time) { |
| fail(); |
| } |
| @Override public void setStartRule(int m, int d, int dow, int time, boolean after) { |
| fail(); |
| } |
| @Override public void setEndRule(int m, int d, int dow, int time) { |
| fail(); |
| } |
| @Override public void setEndRule(int m, int d, int dow, int time, boolean after) { |
| fail(); |
| } |
| }; |
| } |
| |
| // http://b/7955614 and http://b/8026776. |
| public void testDisplayNames() throws Exception { |
| checkDisplayNames(Locale.US); |
| } |
| |
| public void testDisplayNames_nonUS() throws Exception { |
| // run checkDisplayNames with an arbitrary set of Locales. |
| checkDisplayNames(Locale.CHINESE); |
| checkDisplayNames(Locale.FRENCH); |
| checkDisplayNames(Locale.forLanguageTag("bn-BD")); |
| } |
| |
| public void checkDisplayNames(Locale locale) throws Exception { |
| // Check that there are no time zones that use DST but have the same display name for |
| // both standard and daylight time. |
| StringBuilder failures = new StringBuilder(); |
| for (String id : TimeZone.getAvailableIDs()) { |
| TimeZone tz = TimeZone.getTimeZone(id); |
| String longDst = tz.getDisplayName(true, TimeZone.LONG, locale); |
| String longStd = tz.getDisplayName(false, TimeZone.LONG, locale); |
| String shortDst = tz.getDisplayName(true, TimeZone.SHORT, locale); |
| String shortStd = tz.getDisplayName(false, TimeZone.SHORT, locale); |
| |
| if (tz.useDaylightTime()) { |
| // The long std and dst strings must differ! |
| if (longDst.equals(longStd)) { |
| failures.append(String.format("\n%20s: LD='%s' LS='%s'!", |
| id, longDst, longStd)); |
| } |
| // The short std and dst strings must differ! |
| if (shortDst.equals(shortStd)) { |
| failures.append(String.format("\n%20s: SD='%s' SS='%s'!", |
| id, shortDst, shortStd)); |
| } |
| |
| // If the short std matches the long dst, or the long std matches the short dst, |
| // it probably means we have a time zone that icu4c doesn't believe has ever |
| // observed dst. |
| if (shortStd.equals(longDst)) { |
| failures.append(String.format("\n%20s: SS='%s' LD='%s'!", |
| id, shortStd, longDst)); |
| } |
| if (longStd.equals(shortDst)) { |
| failures.append(String.format("\n%20s: LS='%s' SD='%s'!", |
| id, longStd, shortDst)); |
| } |
| |
| // The long and short dst strings must differ! |
| if (longDst.equals(shortDst) && !longDst.startsWith("GMT")) { |
| failures.append(String.format("\n%20s: LD='%s' SD='%s'!", |
| id, longDst, shortDst)); |
| } |
| } |
| |
| // Check that whenever a display name is just a GMT string that it's the |
| // right GMT string. |
| String gmtDst = formatGmtString(tz, true); |
| String gmtStd = formatGmtString(tz, false); |
| if (isGmtString(longDst) && !longDst.equals(gmtDst)) { |
| failures.append(String.format("\n%s: LD %s", id, longDst)); |
| } |
| if (isGmtString(longStd) && !longStd.equals(gmtStd)) { |
| failures.append(String.format("\n%s: LS %s", id, longStd)); |
| } |
| if (isGmtString(shortDst) && !shortDst.equals(gmtDst)) { |
| failures.append(String.format("\n%s: SD %s", id, shortDst)); |
| } |
| if (isGmtString(shortStd) && !shortStd.equals(gmtStd)) { |
| failures.append(String.format("\n%s: SS %s", id, shortStd)); |
| } |
| } |
| assertEquals("", failures.toString()); |
| } |
| |
| // http://b/7955614 |
| public void testApia() { |
| TimeZone tz = TimeZone.getTimeZone("Pacific/Apia"); |
| assertEquals("Apia Daylight Time", tz.getDisplayName(true, TimeZone.LONG, Locale.US)); |
| assertEquals("Apia Standard Time", tz.getDisplayName(false, TimeZone.LONG, Locale.US)); |
| |
| long samoaStandardTime = 1630315635000L; // 30 Aug 2021 |
| long samoaDst = 1614504435000L; // 28 Feb 2021 |
| |
| assertEquals(13 * 60 * 60 * 1_000, tz.getOffset(samoaStandardTime)); |
| assertEquals(14 * 60 * 60 * 1_000, tz.getOffset(samoaDst)); |
| } |
| |
| private static boolean isGmtString(String s) { |
| return s.startsWith("GMT+") || s.startsWith("GMT-"); |
| } |
| |
| private static String formatGmtString(TimeZone tz, boolean daylight) { |
| int offset = tz.getRawOffset(); |
| if (daylight) { |
| offset += tz.getDSTSavings(); |
| } |
| offset /= 60000; |
| char sign = '+'; |
| if (offset < 0) { |
| sign = '-'; |
| offset = -offset; |
| } |
| return String.format("GMT%c%02d:%02d", sign, offset / 60, offset % 60); |
| } |
| |
| /** |
| * This test is to check for 32-bit integer overflow / underflow in TimeZone offset |
| * calculations. A bug (http://b/18839557) was reported when someone noticed that Android's |
| * TimeZone didn't produce the same answers as other libraries at times just outside the range |
| * of Integer seconds. The reason was because of int overflow / underflow which has been fixed. |
| */ |
| public void testOverflowing32BitUnixDates() { |
| final TimeZone tz = TimeZone.getTimeZone("America/New_York"); |
| |
| // These times are significant because they are outside the 32-bit range for seconds. |
| final long beforeInt32Seconds = -2206292400L; // Thu, 01 Feb 1900 05:00:00 GMT |
| final long afterInt32Seconds = 2206292400L; // Wed, 30 Nov 2039 19:00:00 GMT |
| |
| final long lowerTimeMillis = beforeInt32Seconds * 1000L; |
| final long upperTimeMillis = afterInt32Seconds * 1000L; |
| |
| // This timezone didn't have any daylight savings prior to 1917 and this date is in 1900. |
| assertFalse(tz.inDaylightTime(new Date(lowerTimeMillis))); |
| |
| int actualOffset = tz.getOffset(lowerTimeMillis); |
| assertEquals(-18000000, actualOffset); |
| |
| // Nov 30th 2039, no daylight savings as per current rules. |
| assertFalse(tz.inDaylightTime(new Date(upperTimeMillis))); |
| assertEquals(-18000000, tz.getOffset(upperTimeMillis)); |
| } |
| |
| public void testTimeZoneIDLocalization() { |
| Locale defaultLocale = Locale.getDefault(); |
| try { |
| Locale.setDefault(new Locale("en")); |
| TimeZone en_timezone = TimeZone.getTimeZone("GMT+09:00"); |
| Locale.setDefault(new Locale("ar")); |
| TimeZone ar_timezone = TimeZone.getTimeZone("GMT+09:00"); |
| |
| assertEquals(en_timezone.getID(), ar_timezone.getID()); |
| } finally { |
| Locale.setDefault(defaultLocale); |
| } |
| } |
| |
| // http://b/33197219 |
| public void testDisplayNameForNonCanonicalTimezones() { |
| TimeZone canonical = TimeZone.getTimeZone("Europe/London"); |
| TimeZone nonCanonical = TimeZone.getTimeZone("GB"); |
| |
| // verify that GB is actually an alias for Europe/London |
| assertTrue(canonical.hasSameRules(nonCanonical)); |
| |
| assertEquals(canonical.getDisplayName(true, TimeZone.LONG, Locale.ENGLISH), |
| nonCanonical.getDisplayName(true, TimeZone.LONG, Locale.ENGLISH)); |
| } |
| } |