// Copyright 2016 Google Inc. All Rights Reserved.
//
// 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.
#include "absl/time/internal/cctz/include/cctz/time_zone.h"
#include <chrono>
#include <cstddef>
#include <future>
#include <string>
#include <thread>
#include <vector>
#include "absl/time/internal/cctz/include/cctz/civil_time.h"
#include "gtest/gtest.h"
namespace chrono = std::chrono;
namespace absl {
namespace time_internal {
namespace cctz {
namespace {
// A list of known time-zone names.
const char* const kTimeZoneNames[] = {
"Africa/Abidjan",
"Africa/Accra",
"Africa/Addis_Ababa",
"Africa/Algiers",
"Africa/Asmara",
"Africa/Asmera",
"Africa/Bamako",
"Africa/Bangui",
"Africa/Banjul",
"Africa/Bissau",
"Africa/Blantyre",
"Africa/Brazzaville",
"Africa/Bujumbura",
"Africa/Cairo",
"Africa/Casablanca",
"Africa/Ceuta",
"Africa/Conakry",
"Africa/Dakar",
"Africa/Dar_es_Salaam",
"Africa/Djibouti",
"Africa/Douala",
"Africa/El_Aaiun",
"Africa/Freetown",
"Africa/Gaborone",
"Africa/Harare",
"Africa/Johannesburg",
"Africa/Juba",
"Africa/Kampala",
"Africa/Khartoum",
"Africa/Kigali",
"Africa/Kinshasa",
"Africa/Lagos",
"Africa/Libreville",
"Africa/Lome",
"Africa/Luanda",
"Africa/Lubumbashi",
"Africa/Lusaka",
"Africa/Malabo",
"Africa/Maputo",
"Africa/Maseru",
"Africa/Mbabane",
"Africa/Mogadishu",
"Africa/Monrovia",
"Africa/Nairobi",
"Africa/Ndjamena",
"Africa/Niamey",
"Africa/Nouakchott",
"Africa/Ouagadougou",
"Africa/Porto-Novo",
"Africa/Sao_Tome",
"Africa/Timbuktu",
"Africa/Tripoli",
"Africa/Tunis",
"Africa/Windhoek",
"America/Adak",
"America/Anchorage",
"America/Anguilla",
"America/Antigua",
"America/Araguaina",
"America/Argentina/Buenos_Aires",
"America/Argentina/Catamarca",
"America/Argentina/ComodRivadavia",
"America/Argentina/Cordoba",
"America/Argentina/Jujuy",
"America/Argentina/La_Rioja",
"America/Argentina/Mendoza",
"America/Argentina/Rio_Gallegos",
"America/Argentina/Salta",
"America/Argentina/San_Juan",
"America/Argentina/San_Luis",
"America/Argentina/Tucuman",
"America/Argentina/Ushuaia",
"America/Aruba",
"America/Asuncion",
"America/Atikokan",
"America/Atka",
"America/Bahia",
"America/Bahia_Banderas",
"America/Barbados",
"America/Belem",
"America/Belize",
"America/Blanc-Sablon",
"America/Boa_Vista",
"America/Bogota",
"America/Boise",
"America/Buenos_Aires",
"America/Cambridge_Bay",
"America/Campo_Grande",
"America/Cancun",
"America/Caracas",
"America/Catamarca",
"America/Cayenne",
"America/Cayman",
"America/Chicago",
"America/Chihuahua",
"America/Coral_Harbour",
"America/Cordoba",
"America/Costa_Rica",
"America/Creston",
"America/Cuiaba",
"America/Curacao",
"America/Danmarkshavn",
"America/Dawson",
"America/Dawson_Creek",
"America/Denver",
"America/Detroit",
"America/Dominica",
"America/Edmonton",
"America/Eirunepe",
"America/El_Salvador",
"America/Ensenada",
"America/Fort_Nelson",
"America/Fort_Wayne",
"America/Fortaleza",
"America/Glace_Bay",
"America/Godthab",
"America/Goose_Bay",
"America/Grand_Turk",
"America/Grenada",
"America/Guadeloupe",
"America/Guatemala",
"America/Guayaquil",
"America/Guyana",
"America/Halifax",
"America/Havana",
"America/Hermosillo",
"America/Indiana/Indianapolis",
"America/Indiana/Knox",
"America/Indiana/Marengo",
"America/Indiana/Petersburg",
"America/Indiana/Tell_City",
"America/Indiana/Vevay",
"America/Indiana/Vincennes",
"America/Indiana/Winamac",
"America/Indianapolis",
"America/Inuvik",
"America/Iqaluit",
"America/Jamaica",
"America/Jujuy",
"America/Juneau",
"America/Kentucky/Louisville",
"America/Kentucky/Monticello",
"America/Knox_IN",
"America/Kralendijk",
"America/La_Paz",
"America/Lima",
"America/Los_Angeles",
"America/Louisville",
"America/Lower_Princes",
"America/Maceio",
"America/Managua",
"America/Manaus",
"America/Marigot",
"America/Martinique",
"America/Matamoros",
"America/Mazatlan",
"America/Mendoza",
"America/Menominee",
"America/Merida",
"America/Metlakatla",
"America/Mexico_City",
"America/Miquelon",
"America/Moncton",
"America/Monterrey",
"America/Montevideo",
"America/Montreal",
"America/Montserrat",
"America/Nassau",
"America/New_York",
"America/Nipigon",
"America/Nome",
"America/Noronha",
"America/North_Dakota/Beulah",
"America/North_Dakota/Center",
"America/North_Dakota/New_Salem",
"America/Ojinaga",
"America/Panama",
"America/Pangnirtung",
"America/Paramaribo",
"America/Phoenix",
"America/Port-au-Prince",
"America/Port_of_Spain",
"America/Porto_Acre",
"America/Porto_Velho",
"America/Puerto_Rico",
"America/Punta_Arenas",
"America/Rainy_River",
"America/Rankin_Inlet",
"America/Recife",
"America/Regina",
"America/Resolute",
"America/Rio_Branco",
"America/Rosario",
"America/Santa_Isabel",
"America/Santarem",
"America/Santiago",
"America/Santo_Domingo",
"America/Sao_Paulo",
"America/Scoresbysund",
"America/Shiprock",
"America/Sitka",
"America/St_Barthelemy",
"America/St_Johns",
"America/St_Kitts",
"America/St_Lucia",
"America/St_Thomas",
"America/St_Vincent",
"America/Swift_Current",
"America/Tegucigalpa",
"America/Thule",
"America/Thunder_Bay",
"America/Tijuana",
"America/Toronto",
"America/Tortola",
"America/Vancouver",
"America/Virgin",
"America/Whitehorse",
"America/Winnipeg",
"America/Yakutat",
"America/Yellowknife",
"Antarctica/Casey",
"Antarctica/Davis",
"Antarctica/DumontDUrville",
"Antarctica/Macquarie",
"Antarctica/Mawson",
"Antarctica/McMurdo",
"Antarctica/Palmer",
"Antarctica/Rothera",
"Antarctica/South_Pole",
"Antarctica/Syowa",
"Antarctica/Troll",
"Antarctica/Vostok",
"Arctic/Longyearbyen",
"Asia/Aden",
"Asia/Almaty",
"Asia/Amman",
"Asia/Anadyr",
"Asia/Aqtau",
"Asia/Aqtobe",
"Asia/Ashgabat",
"Asia/Ashkhabad",
"Asia/Atyrau",
"Asia/Baghdad",
"Asia/Bahrain",
"Asia/Baku",
"Asia/Bangkok",
"Asia/Barnaul",
"Asia/Beirut",
"Asia/Bishkek",
"Asia/Brunei",
"Asia/Calcutta",
"Asia/Chita",
"Asia/Choibalsan",
"Asia/Chongqing",
"Asia/Chungking",
"Asia/Colombo",
"Asia/Dacca",
"Asia/Damascus",
"Asia/Dhaka",
"Asia/Dili",
"Asia/Dubai",
"Asia/Dushanbe",
"Asia/Famagusta",
"Asia/Gaza",
"Asia/Harbin",
"Asia/Hebron",
"Asia/Ho_Chi_Minh",
"Asia/Hong_Kong",
"Asia/Hovd",
"Asia/Irkutsk",
"Asia/Istanbul",
"Asia/Jakarta",
"Asia/Jayapura",
"Asia/Jerusalem",
"Asia/Kabul",
"Asia/Kamchatka",
"Asia/Karachi",
"Asia/Kashgar",
"Asia/Kathmandu",
"Asia/Katmandu",
"Asia/Khandyga",
"Asia/Kolkata",
"Asia/Krasnoyarsk",
"Asia/Kuala_Lumpur",
"Asia/Kuching",
"Asia/Kuwait",
"Asia/Macao",
"Asia/Macau",
"Asia/Magadan",
"Asia/Makassar",
"Asia/Manila",
"Asia/Muscat",
"Asia/Nicosia",
"Asia/Novokuznetsk",
"Asia/Novosibirsk",
"Asia/Omsk",
"Asia/Oral",
"Asia/Phnom_Penh",
"Asia/Pontianak",
"Asia/Pyongyang",
"Asia/Qatar",
"Asia/Qyzylorda",
"Asia/Rangoon",
"Asia/Riyadh",
"Asia/Saigon",
"Asia/Sakhalin",
"Asia/Samarkand",
"Asia/Seoul",
"Asia/Shanghai",
"Asia/Singapore",
"Asia/Srednekolymsk",
"Asia/Taipei",
"Asia/Tashkent",
"Asia/Tbilisi",
"Asia/Tehran",
"Asia/Tel_Aviv",
"Asia/Thimbu",
"Asia/Thimphu",
"Asia/Tokyo",
"Asia/Tomsk",
"Asia/Ujung_Pandang",
"Asia/Ulaanbaatar",
"Asia/Ulan_Bator",
"Asia/Urumqi",
"Asia/Ust-Nera",
"Asia/Vientiane",
"Asia/Vladivostok",
"Asia/Yakutsk",
"Asia/Yangon",
"Asia/Yekaterinburg",
"Asia/Yerevan",
"Atlantic/Azores",
"Atlantic/Bermuda",
"Atlantic/Canary",
"Atlantic/Cape_Verde",
"Atlantic/Faeroe",
"Atlantic/Faroe",
"Atlantic/Jan_Mayen",
"Atlantic/Madeira",
"Atlantic/Reykjavik",
"Atlantic/South_Georgia",
"Atlantic/St_Helena",
"Atlantic/Stanley",
"Australia/ACT",
"Australia/Adelaide",
"Australia/Brisbane",
"Australia/Broken_Hill",
"Australia/Canberra",
"Australia/Currie",
"Australia/Darwin",
"Australia/Eucla",
"Australia/Hobart",
"Australia/LHI",
"Australia/Lindeman",
"Australia/Lord_Howe",
"Australia/Melbourne",
"Australia/NSW",
"Australia/North",
"Australia/Perth",
"Australia/Queensland",
"Australia/South",
"Australia/Sydney",
"Australia/Tasmania",
"Australia/Victoria",
"Australia/West",
"Australia/Yancowinna",
"Brazil/Acre",
"Brazil/DeNoronha",
"Brazil/East",
"Brazil/West",
"CET",
"CST6CDT",
"Canada/Atlantic",
"Canada/Central",
"Canada/Eastern",
"Canada/Mountain",
"Canada/Newfoundland",
"Canada/Pacific",
"Canada/Saskatchewan",
"Canada/Yukon",
"Chile/Continental",
"Chile/EasterIsland",
"Cuba",
"EET",
"EST",
"EST5EDT",
"Egypt",
"Eire",
"Etc/GMT",
"Etc/GMT+0",
"Etc/GMT+1",
"Etc/GMT+10",
"Etc/GMT+11",
"Etc/GMT+12",
"Etc/GMT+2",
"Etc/GMT+3",
"Etc/GMT+4",
"Etc/GMT+5",
"Etc/GMT+6",
"Etc/GMT+7",
"Etc/GMT+8",
"Etc/GMT+9",
"Etc/GMT-0",
"Etc/GMT-1",
"Etc/GMT-10",
"Etc/GMT-11",
"Etc/GMT-12",
"Etc/GMT-13",
"Etc/GMT-14",
"Etc/GMT-2",
"Etc/GMT-3",
"Etc/GMT-4",
"Etc/GMT-5",
"Etc/GMT-6",
"Etc/GMT-7",
"Etc/GMT-8",
"Etc/GMT-9",
"Etc/GMT0",
"Etc/Greenwich",
"Etc/UCT",
"Etc/UTC",
"Etc/Universal",
"Etc/Zulu",
"Europe/Amsterdam",
"Europe/Andorra",
"Europe/Astrakhan",
"Europe/Athens",
"Europe/Belfast",
"Europe/Belgrade",
"Europe/Berlin",
"Europe/Bratislava",
"Europe/Brussels",
"Europe/Bucharest",
"Europe/Budapest",
"Europe/Busingen",
"Europe/Chisinau",
"Europe/Copenhagen",
"Europe/Dublin",
"Europe/Gibraltar",
"Europe/Guernsey",
"Europe/Helsinki",
"Europe/Isle_of_Man",
"Europe/Istanbul",
"Europe/Jersey",
"Europe/Kaliningrad",
"Europe/Kiev",
"Europe/Kirov",
"Europe/Lisbon",
"Europe/Ljubljana",
"Europe/London",
"Europe/Luxembourg",
"Europe/Madrid",
"Europe/Malta",
"Europe/Mariehamn",
"Europe/Minsk",
"Europe/Monaco",
"Europe/Moscow",
"Europe/Nicosia",
"Europe/Oslo",
"Europe/Paris",
"Europe/Podgorica",
"Europe/Prague",
"Europe/Riga",
"Europe/Rome",
"Europe/Samara",
"Europe/San_Marino",
"Europe/Sarajevo",
"Europe/Saratov",
"Europe/Simferopol",
"Europe/Skopje",
"Europe/Sofia",
"Europe/Stockholm",
"Europe/Tallinn",
"Europe/Tirane",
"Europe/Tiraspol",
"Europe/Ulyanovsk",
"Europe/Uzhgorod",
"Europe/Vaduz",
"Europe/Vatican",
"Europe/Vienna",
"Europe/Vilnius",
"Europe/Volgograd",
"Europe/Warsaw",
"Europe/Zagreb",
"Europe/Zaporozhye",
"Europe/Zurich",
"GB",
"GB-Eire",
"GMT",
"GMT+0",
"GMT-0",
"GMT0",
"Greenwich",
"HST",
"Hongkong",
"Iceland",
"Indian/Antananarivo",
"Indian/Chagos",
"Indian/Christmas",
"Indian/Cocos",
"Indian/Comoro",
"Indian/Kerguelen",
"Indian/Mahe",
"Indian/Maldives",
"Indian/Mauritius",
"Indian/Mayotte",
"Indian/Reunion",
"Iran",
"Israel",
"Jamaica",
"Japan",
"Kwajalein",
"Libya",
"MET",
"MST",
"MST7MDT",
"Mexico/BajaNorte",
"Mexico/BajaSur",
"Mexico/General",
"NZ",
"NZ-CHAT",
"Navajo",
"PRC",
"PST8PDT",
"Pacific/Apia",
"Pacific/Auckland",
"Pacific/Bougainville",
"Pacific/Chatham",
"Pacific/Chuuk",
"Pacific/Easter",
"Pacific/Efate",
"Pacific/Enderbury",
"Pacific/Fakaofo",
"Pacific/Fiji",
"Pacific/Funafuti",
"Pacific/Galapagos",
"Pacific/Gambier",
"Pacific/Guadalcanal",
"Pacific/Guam",
"Pacific/Honolulu",
"Pacific/Johnston",
"Pacific/Kiritimati",
"Pacific/Kosrae",
"Pacific/Kwajalein",
"Pacific/Majuro",
"Pacific/Marquesas",
"Pacific/Midway",
"Pacific/Nauru",
"Pacific/Niue",
"Pacific/Norfolk",
"Pacific/Noumea",
"Pacific/Pago_Pago",
"Pacific/Palau",
"Pacific/Pitcairn",
"Pacific/Pohnpei",
"Pacific/Ponape",
"Pacific/Port_Moresby",
"Pacific/Rarotonga",
"Pacific/Saipan",
"Pacific/Samoa",
"Pacific/Tahiti",
"Pacific/Tarawa",
"Pacific/Tongatapu",
"Pacific/Truk",
"Pacific/Wake",
"Pacific/Wallis",
"Pacific/Yap",
"Poland",
"Portugal",
"ROC",
"ROK",
"Singapore",
"Turkey",
"UCT",
"US/Alaska",
"US/Aleutian",
"US/Arizona",
"US/Central",
"US/East-Indiana",
"US/Eastern",
"US/Hawaii",
"US/Indiana-Starke",
"US/Michigan",
"US/Mountain",
"US/Pacific",
"US/Samoa",
"UTC",
"Universal",
"W-SU",
"WET",
"Zulu",
nullptr
};
// Helper to return a loaded time zone by value (UTC on error).
time_zone LoadZone(const std::string& name) {
time_zone tz;
load_time_zone(name, &tz);
return tz;
}
// This helper is a macro so that failed expectations show up with the
// correct line numbers.
#define ExpectTime(tp, tz, y, m, d, hh, mm, ss, off, isdst, zone) \
do { \
time_zone::absolute_lookup al = tz.lookup(tp); \
EXPECT_EQ(y, al.cs.year()); \
EXPECT_EQ(m, al.cs.month()); \
EXPECT_EQ(d, al.cs.day()); \
EXPECT_EQ(hh, al.cs.hour()); \
EXPECT_EQ(mm, al.cs.minute()); \
EXPECT_EQ(ss, al.cs.second()); \
EXPECT_EQ(off, al.offset); \
EXPECT_TRUE(isdst == al.is_dst); \
/* EXPECT_STREQ(zone, al.abbr); */ \
} while (0)
} // namespace
TEST(TimeZones, LoadZonesConcurrently) {
std::promise<void> ready_promise;
std::shared_future<void> ready_future(ready_promise.get_future());
auto load_zones = [ready_future](std::promise<void>* started,
std::set<std::string>* failures) {
started->set_value();
ready_future.wait();
for (const char* const* np = kTimeZoneNames; *np != nullptr; ++np) {
std::string zone = *np;
time_zone tz;
if (load_time_zone(zone, &tz)) {
EXPECT_EQ(zone, tz.name());
} else {
failures->insert(zone);
}
}
};
const std::size_t n_threads = 128;
std::vector<std::thread> threads;
std::vector<std::set<std::string>> thread_failures(n_threads);
for (std::size_t i = 0; i != n_threads; ++i) {
std::promise<void> started;
threads.emplace_back(load_zones, &started, &thread_failures[i]);
started.get_future().wait();
}
ready_promise.set_value();
for (auto& thread : threads) {
thread.join();
}
// Allow a small number of failures to account for skew between
// the contents of kTimeZoneNames and the zoneinfo data source.
#if defined(__ANDROID__)
// Cater to the possibility of using an even older zoneinfo data
// source when running on Android, where it is difficult to override
// the bionic tzdata provided by the test environment.
const std::size_t max_failures = 20;
#else
const std::size_t max_failures = 3;
#endif
std::set<std::string> failures;
for (const auto& thread_failure : thread_failures) {
failures.insert(thread_failure.begin(), thread_failure.end());
}
EXPECT_LE(failures.size(), max_failures) << testing::PrintToString(failures);
}
TEST(TimeZone, NamedTimeZones) {
const time_zone utc = utc_time_zone();
EXPECT_EQ("UTC", utc.name());
const time_zone nyc = LoadZone("America/New_York");
EXPECT_EQ("America/New_York", nyc.name());
const time_zone syd = LoadZone("Australia/Sydney");
EXPECT_EQ("Australia/Sydney", syd.name());
const time_zone fixed0 = fixed_time_zone(absl::time_internal::cctz::seconds::zero());
EXPECT_EQ("UTC", fixed0.name());
const time_zone fixed_pos = fixed_time_zone(
chrono::hours(3) + chrono::minutes(25) + chrono::seconds(45));
EXPECT_EQ("Fixed/UTC+03:25:45", fixed_pos.name());
const time_zone fixed_neg = fixed_time_zone(
-(chrono::hours(12) + chrono::minutes(34) + chrono::seconds(56)));
EXPECT_EQ("Fixed/UTC-12:34:56", fixed_neg.name());
}
TEST(TimeZone, Failures) {
time_zone tz;
EXPECT_FALSE(load_time_zone(":America/Los_Angeles", &tz));
tz = LoadZone("America/Los_Angeles");
EXPECT_FALSE(load_time_zone("Invalid/TimeZone", &tz));
EXPECT_EQ(chrono::system_clock::from_time_t(0),
convert(civil_second(1970, 1, 1, 0, 0, 0), tz)); // UTC
// Ensures that the load still fails on a subsequent attempt.
tz = LoadZone("America/Los_Angeles");
EXPECT_FALSE(load_time_zone("Invalid/TimeZone", &tz));
EXPECT_EQ(chrono::system_clock::from_time_t(0),
convert(civil_second(1970, 1, 1, 0, 0, 0), tz)); // UTC
// Loading an empty std::string timezone should fail.
tz = LoadZone("America/Los_Angeles");
EXPECT_FALSE(load_time_zone("", &tz));
EXPECT_EQ(chrono::system_clock::from_time_t(0),
convert(civil_second(1970, 1, 1, 0, 0, 0), tz)); // UTC
}
TEST(TimeZone, Equality) {
const time_zone a;
const time_zone b;
EXPECT_EQ(a, b);
EXPECT_EQ(a.name(), b.name());
const time_zone implicit_utc;
const time_zone explicit_utc = utc_time_zone();
EXPECT_EQ(implicit_utc, explicit_utc);
EXPECT_EQ(implicit_utc.name(), explicit_utc.name());
const time_zone fixed_zero = fixed_time_zone(absl::time_internal::cctz::seconds::zero());
EXPECT_EQ(fixed_zero, LoadZone(fixed_zero.name()));
EXPECT_EQ(fixed_zero, explicit_utc);
const time_zone fixed_utc = LoadZone("Fixed/UTC+00:00:00");
EXPECT_EQ(fixed_utc, LoadZone(fixed_utc.name()));
EXPECT_EQ(fixed_utc, explicit_utc);
const time_zone fixed_pos = fixed_time_zone(
chrono::hours(3) + chrono::minutes(25) + chrono::seconds(45));
EXPECT_EQ(fixed_pos, LoadZone(fixed_pos.name()));
EXPECT_NE(fixed_pos, explicit_utc);
const time_zone fixed_neg = fixed_time_zone(
-(chrono::hours(12) + chrono::minutes(34) + chrono::seconds(56)));
EXPECT_EQ(fixed_neg, LoadZone(fixed_neg.name()));
EXPECT_NE(fixed_neg, explicit_utc);
const time_zone fixed_lim = fixed_time_zone(chrono::hours(24));
EXPECT_EQ(fixed_lim, LoadZone(fixed_lim.name()));
EXPECT_NE(fixed_lim, explicit_utc);
const time_zone fixed_ovfl =
fixed_time_zone(chrono::hours(24) + chrono::seconds(1));
EXPECT_EQ(fixed_ovfl, LoadZone(fixed_ovfl.name()));
EXPECT_EQ(fixed_ovfl, explicit_utc);
EXPECT_EQ(fixed_time_zone(chrono::seconds(1)),
fixed_time_zone(chrono::seconds(1)));
const time_zone local = local_time_zone();
EXPECT_EQ(local, LoadZone(local.name()));
time_zone la = LoadZone("America/Los_Angeles");
time_zone nyc = LoadZone("America/New_York");
EXPECT_NE(la, nyc);
}
TEST(StdChronoTimePoint, TimeTAlignment) {
// Ensures that the Unix epoch and the system clock epoch are an integral
// number of seconds apart. This simplifies conversions to/from time_t.
auto diff = chrono::system_clock::time_point() -
chrono::system_clock::from_time_t(0);
EXPECT_EQ(chrono::system_clock::time_point::duration::zero(),
diff % chrono::seconds(1));
}
TEST(BreakTime, TimePointResolution) {
const time_zone utc = utc_time_zone();
const auto t0 = chrono::system_clock::from_time_t(0);
ExpectTime(chrono::time_point_cast<chrono::nanoseconds>(t0), utc,
1970, 1, 1, 0, 0, 0, 0, false, "UTC");
ExpectTime(chrono::time_point_cast<chrono::microseconds>(t0), utc,
1970, 1, 1, 0, 0, 0, 0, false, "UTC");
ExpectTime(chrono::time_point_cast<chrono::milliseconds>(t0), utc,
1970, 1, 1, 0, 0, 0, 0, false, "UTC");
ExpectTime(chrono::time_point_cast<chrono::seconds>(t0), utc,
1970, 1, 1, 0, 0, 0, 0, false, "UTC");
ExpectTime(chrono::time_point_cast<absl::time_internal::cctz::seconds>(t0), utc,
1970, 1, 1, 0, 0, 0, 0, false, "UTC");
ExpectTime(chrono::time_point_cast<chrono::minutes>(t0), utc,
1970, 1, 1, 0, 0, 0, 0, false, "UTC");
ExpectTime(chrono::time_point_cast<chrono::hours>(t0), utc,
1970, 1, 1, 0, 0, 0, 0, false, "UTC");
}
TEST(BreakTime, LocalTimeInUTC) {
const time_zone tz = utc_time_zone();
const auto tp = chrono::system_clock::from_time_t(0);
ExpectTime(tp, tz, 1970, 1, 1, 0, 0, 0, 0, false, "UTC");
EXPECT_EQ(weekday::thursday, get_weekday(civil_day(convert(tp, tz))));
}
TEST(BreakTime, LocalTimeInUTCUnaligned) {
const time_zone tz = utc_time_zone();
const auto tp =
chrono::system_clock::from_time_t(0) - chrono::milliseconds(500);
ExpectTime(tp, tz, 1969, 12, 31, 23, 59, 59, 0, false, "UTC");
EXPECT_EQ(weekday::wednesday, get_weekday(civil_day(convert(tp, tz))));
}
TEST(BreakTime, LocalTimePosix) {
// See IEEE Std 1003.1-1988 B.2.3 General Terms, Epoch.
const time_zone tz = utc_time_zone();
const auto tp = chrono::system_clock::from_time_t(536457599);
ExpectTime(tp, tz, 1986, 12, 31, 23, 59, 59, 0, false, "UTC");
EXPECT_EQ(weekday::wednesday, get_weekday(civil_day(convert(tp, tz))));
}
TEST(TimeZoneImpl, LocalTimeInFixed) {
const absl::time_internal::cctz::seconds offset =
-(chrono::hours(8) + chrono::minutes(33) + chrono::seconds(47));
const time_zone tz = fixed_time_zone(offset);
const auto tp = chrono::system_clock::from_time_t(0);
ExpectTime(tp, tz, 1969, 12, 31, 15, 26, 13, offset.count(), false,
"-083347");
EXPECT_EQ(weekday::wednesday, get_weekday(civil_day(convert(tp, tz))));
}
TEST(BreakTime, LocalTimeInNewYork) {
const time_zone tz = LoadZone("America/New_York");
const auto tp = chrono::system_clock::from_time_t(45);
ExpectTime(tp, tz, 1969, 12, 31, 19, 0, 45, -5 * 60 * 60, false, "EST");
EXPECT_EQ(weekday::wednesday, get_weekday(civil_day(convert(tp, tz))));
}
TEST(BreakTime, LocalTimeInMTV) {
const time_zone tz = LoadZone("America/Los_Angeles");
const auto tp = chrono::system_clock::from_time_t(1380855729);
ExpectTime(tp, tz, 2013, 10, 3, 20, 2, 9, -7 * 60 * 60, true, "PDT");
EXPECT_EQ(weekday::thursday, get_weekday(civil_day(convert(tp, tz))));
}
TEST(BreakTime, LocalTimeInSydney) {
const time_zone tz = LoadZone("Australia/Sydney");
const auto tp = chrono::system_clock::from_time_t(90);
ExpectTime(tp, tz, 1970, 1, 1, 10, 1, 30, 10 * 60 * 60, false, "AEST");
EXPECT_EQ(weekday::thursday, get_weekday(civil_day(convert(tp, tz))));
}
TEST(MakeTime, TimePointResolution) {
const time_zone utc = utc_time_zone();
const time_point<chrono::nanoseconds> tp_ns =
convert(civil_second(2015, 1, 2, 3, 4, 5), utc);
EXPECT_EQ("04:05", format("%M:%E*S", tp_ns, utc));
const time_point<chrono::microseconds> tp_us =
convert(civil_second(2015, 1, 2, 3, 4, 5), utc);
EXPECT_EQ("04:05", format("%M:%E*S", tp_us, utc));
const time_point<chrono::milliseconds> tp_ms =
convert(civil_second(2015, 1, 2, 3, 4, 5), utc);
EXPECT_EQ("04:05", format("%M:%E*S", tp_ms, utc));
const time_point<chrono::seconds> tp_s =
convert(civil_second(2015, 1, 2, 3, 4, 5), utc);
EXPECT_EQ("04:05", format("%M:%E*S", tp_s, utc));
const time_point<absl::time_internal::cctz::seconds> tp_s64 =
convert(civil_second(2015, 1, 2, 3, 4, 5), utc);
EXPECT_EQ("04:05", format("%M:%E*S", tp_s64, utc));
// These next two require chrono::time_point_cast because the conversion
// from a resolution of seconds (the return value of convert()) to a
// coarser resolution requires an explicit cast.
const time_point<chrono::minutes> tp_m =
chrono::time_point_cast<chrono::minutes>(
convert(civil_second(2015, 1, 2, 3, 4, 5), utc));
EXPECT_EQ("04:00", format("%M:%E*S", tp_m, utc));
const time_point<chrono::hours> tp_h =
chrono::time_point_cast<chrono::hours>(
convert(civil_second(2015, 1, 2, 3, 4, 5), utc));
EXPECT_EQ("00:00", format("%M:%E*S", tp_h, utc));
}
TEST(MakeTime, Normalization) {
const time_zone tz = LoadZone("America/New_York");
const auto tp = convert(civil_second(2009, 2, 13, 18, 31, 30), tz);
EXPECT_EQ(chrono::system_clock::from_time_t(1234567890), tp);
// Now requests for the same time_point but with out-of-range fields.
EXPECT_EQ(tp, convert(civil_second(2008, 14, 13, 18, 31, 30), tz)); // month
EXPECT_EQ(tp, convert(civil_second(2009, 1, 44, 18, 31, 30), tz)); // day
EXPECT_EQ(tp, convert(civil_second(2009, 2, 12, 42, 31, 30), tz)); // hour
EXPECT_EQ(tp, convert(civil_second(2009, 2, 13, 17, 91, 30), tz)); // minute
EXPECT_EQ(tp, convert(civil_second(2009, 2, 13, 18, 30, 90), tz)); // second
}
// NOTE: Run this with --copt=-ftrapv to detect overflow problems.
TEST(MakeTime, SysSecondsLimits) {
const char RFC3339[] = "%Y-%m-%dT%H:%M:%S%Ez";
const time_zone utc = utc_time_zone();
const time_zone east = fixed_time_zone(chrono::hours(14));
const time_zone west = fixed_time_zone(-chrono::hours(14));
time_point<absl::time_internal::cctz::seconds> tp;
// Approach the maximal time_point<cctz::seconds> value from below.
tp = convert(civil_second(292277026596, 12, 4, 15, 30, 6), utc);
EXPECT_EQ("292277026596-12-04T15:30:06+00:00", format(RFC3339, tp, utc));
tp = convert(civil_second(292277026596, 12, 4, 15, 30, 7), utc);
EXPECT_EQ("292277026596-12-04T15:30:07+00:00", format(RFC3339, tp, utc));
EXPECT_EQ(time_point<absl::time_internal::cctz::seconds>::max(), tp);
tp = convert(civil_second(292277026596, 12, 4, 15, 30, 8), utc);
EXPECT_EQ(time_point<absl::time_internal::cctz::seconds>::max(), tp);
tp = convert(civil_second::max(), utc);
EXPECT_EQ(time_point<absl::time_internal::cctz::seconds>::max(), tp);
// Checks that we can also get the maximal value for a far-east zone.
tp = convert(civil_second(292277026596, 12, 5, 5, 30, 7), east);
EXPECT_EQ("292277026596-12-05T05:30:07+14:00", format(RFC3339, tp, east));
EXPECT_EQ(time_point<absl::time_internal::cctz::seconds>::max(), tp);
tp = convert(civil_second(292277026596, 12, 5, 5, 30, 8), east);
EXPECT_EQ(time_point<absl::time_internal::cctz::seconds>::max(), tp);
tp = convert(civil_second::max(), east);
EXPECT_EQ(time_point<absl::time_internal::cctz::seconds>::max(), tp);
// Checks that we can also get the maximal value for a far-west zone.
tp = convert(civil_second(292277026596, 12, 4, 1, 30, 7), west);
EXPECT_EQ("292277026596-12-04T01:30:07-14:00", format(RFC3339, tp, west));
EXPECT_EQ(time_point<absl::time_internal::cctz::seconds>::max(), tp);
tp = convert(civil_second(292277026596, 12, 4, 7, 30, 8), west);
EXPECT_EQ(time_point<absl::time_internal::cctz::seconds>::max(), tp);
tp = convert(civil_second::max(), west);
EXPECT_EQ(time_point<absl::time_internal::cctz::seconds>::max(), tp);
// Approach the minimal time_point<cctz::seconds> value from above.
tp = convert(civil_second(-292277022657, 1, 27, 8, 29, 53), utc);
EXPECT_EQ("-292277022657-01-27T08:29:53+00:00", format(RFC3339, tp, utc));
tp = convert(civil_second(-292277022657, 1, 27, 8, 29, 52), utc);
EXPECT_EQ("-292277022657-01-27T08:29:52+00:00", format(RFC3339, tp, utc));
EXPECT_EQ(time_point<absl::time_internal::cctz::seconds>::min(), tp);
tp = convert(civil_second(-292277022657, 1, 27, 8, 29, 51), utc);
EXPECT_EQ(time_point<absl::time_internal::cctz::seconds>::min(), tp);
tp = convert(civil_second::min(), utc);
EXPECT_EQ(time_point<absl::time_internal::cctz::seconds>::min(), tp);
// Checks that we can also get the minimal value for a far-east zone.
tp = convert(civil_second(-292277022657, 1, 27, 22, 29, 52), east);
EXPECT_EQ("-292277022657-01-27T22:29:52+14:00", format(RFC3339, tp, east));
EXPECT_EQ(time_point<absl::time_internal::cctz::seconds>::min(), tp);
tp = convert(civil_second(-292277022657, 1, 27, 22, 29, 51), east);
EXPECT_EQ(time_point<absl::time_internal::cctz::seconds>::min(), tp);
tp = convert(civil_second::min(), east);
EXPECT_EQ(time_point<absl::time_internal::cctz::seconds>::min(), tp);
// Checks that we can also get the minimal value for a far-west zone.
tp = convert(civil_second(-292277022657, 1, 26, 18, 29, 52), west);
EXPECT_EQ("-292277022657-01-26T18:29:52-14:00", format(RFC3339, tp, west));
EXPECT_EQ(time_point<absl::time_internal::cctz::seconds>::min(), tp);
tp = convert(civil_second(-292277022657, 1, 26, 18, 29, 51), west);
EXPECT_EQ(time_point<absl::time_internal::cctz::seconds>::min(), tp);
tp = convert(civil_second::min(), west);
EXPECT_EQ(time_point<absl::time_internal::cctz::seconds>::min(), tp);
}
TEST(TimeZoneEdgeCase, AmericaNewYork) {
const time_zone tz = LoadZone("America/New_York");
// Spring 1:59:59 -> 3:00:00
auto tp = convert(civil_second(2013, 3, 10, 1, 59, 59), tz);
ExpectTime(tp, tz, 2013, 3, 10, 1, 59, 59, -5 * 3600, false, "EST");
tp += absl::time_internal::cctz::seconds(1);
ExpectTime(tp, tz, 2013, 3, 10, 3, 0, 0, -4 * 3600, true, "EDT");
// Fall 1:59:59 -> 1:00:00
tp = convert(civil_second(2013, 11, 3, 1, 59, 59), tz);
ExpectTime(tp, tz, 2013, 11, 3, 1, 59, 59, -4 * 3600, true, "EDT");
tp += absl::time_internal::cctz::seconds(1);
ExpectTime(tp, tz, 2013, 11, 3, 1, 0, 0, -5 * 3600, false, "EST");
}
TEST(TimeZoneEdgeCase, AmericaLosAngeles) {
const time_zone tz = LoadZone("America/Los_Angeles");
// Spring 1:59:59 -> 3:00:00
auto tp = convert(civil_second(2013, 3, 10, 1, 59, 59), tz);
ExpectTime(tp, tz, 2013, 3, 10, 1, 59, 59, -8 * 3600, false, "PST");
tp += absl::time_internal::cctz::seconds(1);
ExpectTime(tp, tz, 2013, 3, 10, 3, 0, 0, -7 * 3600, true, "PDT");
// Fall 1:59:59 -> 1:00:00
tp = convert(civil_second(2013, 11, 3, 1, 59, 59), tz);
ExpectTime(tp, tz, 2013, 11, 3, 1, 59, 59, -7 * 3600, true, "PDT");
tp += absl::time_internal::cctz::seconds(1);
ExpectTime(tp, tz, 2013, 11, 3, 1, 0, 0, -8 * 3600, false, "PST");
}
TEST(TimeZoneEdgeCase, ArizonaNoTransition) {
const time_zone tz = LoadZone("America/Phoenix");
// No transition in Spring.
auto tp = convert(civil_second(2013, 3, 10, 1, 59, 59), tz);
ExpectTime(tp, tz, 2013, 3, 10, 1, 59, 59, -7 * 3600, false, "MST");
tp += absl::time_internal::cctz::seconds(1);
ExpectTime(tp, tz, 2013, 3, 10, 2, 0, 0, -7 * 3600, false, "MST");
// No transition in Fall.
tp = convert(civil_second(2013, 11, 3, 1, 59, 59), tz);
ExpectTime(tp, tz, 2013, 11, 3, 1, 59, 59, -7 * 3600, false, "MST");
tp += absl::time_internal::cctz::seconds(1);
ExpectTime(tp, tz, 2013, 11, 3, 2, 0, 0, -7 * 3600, false, "MST");
}
TEST(TimeZoneEdgeCase, AsiaKathmandu) {
const time_zone tz = LoadZone("Asia/Kathmandu");
// A non-DST offset change from +0530 to +0545
//
// 504901799 == Tue, 31 Dec 1985 23:59:59 +0530 (+0530)
// 504901800 == Wed, 1 Jan 1986 00:15:00 +0545 (+0545)
auto tp = convert(civil_second(1985, 12, 31, 23, 59, 59), tz);
ExpectTime(tp, tz, 1985, 12, 31, 23, 59, 59, 5.5 * 3600, false, "+0530");
tp += absl::time_internal::cctz::seconds(1);
ExpectTime(tp, tz, 1986, 1, 1, 0, 15, 0, 5.75 * 3600, false, "+0545");
}
TEST(TimeZoneEdgeCase, PacificChatham) {
const time_zone tz = LoadZone("Pacific/Chatham");
// One-hour DST offset changes, but at atypical values
//
// 1365256799 == Sun, 7 Apr 2013 03:44:59 +1345 (+1345)
// 1365256800 == Sun, 7 Apr 2013 02:45:00 +1245 (+1245)
auto tp = convert(civil_second(2013, 4, 7, 3, 44, 59), tz);
ExpectTime(tp, tz, 2013, 4, 7, 3, 44, 59, 13.75 * 3600, true, "+1345");
tp += absl::time_internal::cctz::seconds(1);
ExpectTime(tp, tz, 2013, 4, 7, 2, 45, 0, 12.75 * 3600, false, "+1245");
// 1380376799 == Sun, 29 Sep 2013 02:44:59 +1245 (+1245)
// 1380376800 == Sun, 29 Sep 2013 03:45:00 +1345 (+1345)
tp = convert(civil_second(2013, 9, 29, 2, 44, 59), tz);
ExpectTime(tp, tz, 2013, 9, 29, 2, 44, 59, 12.75 * 3600, false, "+1245");
tp += absl::time_internal::cctz::seconds(1);
ExpectTime(tp, tz, 2013, 9, 29, 3, 45, 0, 13.75 * 3600, true, "+1345");
}
TEST(TimeZoneEdgeCase, AustraliaLordHowe) {
const time_zone tz = LoadZone("Australia/Lord_Howe");
// Half-hour DST offset changes
//
// 1365260399 == Sun, 7 Apr 2013 01:59:59 +1100 (+11)
// 1365260400 == Sun, 7 Apr 2013 01:30:00 +1030 (+1030)
auto tp = convert(civil_second(2013, 4, 7, 1, 59, 59), tz);
ExpectTime(tp, tz, 2013, 4, 7, 1, 59, 59, 11 * 3600, true, "+11");
tp += absl::time_internal::cctz::seconds(1);
ExpectTime(tp, tz, 2013, 4, 7, 1, 30, 0, 10.5 * 3600, false, "+1030");
// 1380986999 == Sun, 6 Oct 2013 01:59:59 +1030 (+1030)
// 1380987000 == Sun, 6 Oct 2013 02:30:00 +1100 (+11)
tp = convert(civil_second(2013, 10, 6, 1, 59, 59), tz);
ExpectTime(tp, tz, 2013, 10, 6, 1, 59, 59, 10.5 * 3600, false, "+1030");
tp += absl::time_internal::cctz::seconds(1);
ExpectTime(tp, tz, 2013, 10, 6, 2, 30, 0, 11 * 3600, true, "+11");
}
TEST(TimeZoneEdgeCase, PacificApia) {
const time_zone tz = LoadZone("Pacific/Apia");
// At the end of December 2011, Samoa jumped forward by one day,
// skipping 30 December from the local calendar, when the nation
// moved to the west of the International Date Line.
//
// A one-day, non-DST offset change
//
// 1325239199 == Thu, 29 Dec 2011 23:59:59 -1000 (-10)
// 1325239200 == Sat, 31 Dec 2011 00:00:00 +1400 (+14)
auto tp = convert(civil_second(2011, 12, 29, 23, 59, 59), tz);
ExpectTime(tp, tz, 2011, 12, 29, 23, 59, 59, -10 * 3600, true, "-10");
EXPECT_EQ(363, get_yearday(civil_day(convert(tp, tz))));
tp += absl::time_internal::cctz::seconds(1);
ExpectTime(tp, tz, 2011, 12, 31, 0, 0, 0, 14 * 3600, true, "+14");
EXPECT_EQ(365, get_yearday(civil_day(convert(tp, tz))));
}
TEST(TimeZoneEdgeCase, AfricaCairo) {
const time_zone tz = LoadZone("Africa/Cairo");
#if defined(__ANDROID__) && __ANDROID_API__ < 21
// Only Android 'L' and beyond have this tz2014c transition.
#else
// An interesting case of midnight not existing.
//
// 1400191199 == Thu, 15 May 2014 23:59:59 +0200 (EET)
// 1400191200 == Fri, 16 May 2014 01:00:00 +0300 (EEST)
auto tp = convert(civil_second(2014, 5, 15, 23, 59, 59), tz);
ExpectTime(tp, tz, 2014, 5, 15, 23, 59, 59, 2 * 3600, false, "EET");
tp += absl::time_internal::cctz::seconds(1);
ExpectTime(tp, tz, 2014, 5, 16, 1, 0, 0, 3 * 3600, true, "EEST");
#endif
}
TEST(TimeZoneEdgeCase, AfricaMonrovia) {
const time_zone tz = LoadZone("Africa/Monrovia");
#if defined(__ANDROID__) && __ANDROID_API__ < 26
// Only Android 'O' and beyond have this tz2017b transition.
#else
// Strange offset change -00:44:30 -> +00:00:00 (non-DST)
//
// 63593069 == Thu, 6 Jan 1972 23:59:59 -0044 (MMT)
// 63593070 == Fri, 7 Jan 1972 00:44:30 +0000 (GMT)
auto tp = convert(civil_second(1972, 1, 6, 23, 59, 59), tz);
ExpectTime(tp, tz, 1972, 1, 6, 23, 59, 59, -44.5 * 60, false, "MMT");
tp += absl::time_internal::cctz::seconds(1);
ExpectTime(tp, tz, 1972, 1, 7, 0, 44, 30, 0 * 60, false, "GMT");
#endif
}
TEST(TimeZoneEdgeCase, AmericaJamaica) {
// Jamaica discontinued DST transitions in 1983, and is now at a
// constant -0500. This makes it an interesting edge-case target.
// Note that the 32-bit times used in a (tzh_version == 0) zoneinfo
// file cannot represent the abbreviation-only transition of 1890,
// so we ignore the abbreviation by expecting what we received.
const time_zone tz = LoadZone("America/Jamaica");
// Before the first transition.
auto tp = convert(civil_second(1889, 12, 31, 0, 0, 0), tz);
#if AMERICA_JAMAICA_PRE_1913_OFFSET_FIX
// Commit 907241e: Fix off-by-1 error for Jamaica and T&C before 1913.
// Until that commit has made its way into a full release we avoid the
// expectations on the -18430 offset below. TODO: Uncomment these.
ExpectTime(tp, tz, 1889, 12, 31, 0, 0, 0, -18430, false,
tz.lookup(tp).abbr);
// Over the first (abbreviation-change only) transition.
// -2524503170 == Tue, 31 Dec 1889 23:59:59 -0507 (LMT)
// -2524503169 == Wed, 1 Jan 1890 00:00:00 -0507 (KMT)
tp = convert(civil_second(1889, 12, 31, 23, 59, 59), tz);
ExpectTime(tp, tz, 1889, 12, 31, 23, 59, 59, -18430, false,
tz.lookup(tp).abbr);
tp += absl::time_internal::cctz::seconds(1);
ExpectTime(tp, tz, 1890, 1, 1, 0, 0, 0, -18430, false, "KMT");
#endif
// Over the last (DST) transition.
// 436341599 == Sun, 30 Oct 1983 01:59:59 -0400 (EDT)
// 436341600 == Sun, 30 Oct 1983 01:00:00 -0500 (EST)
tp = convert(civil_second(1983, 10, 30, 1, 59, 59), tz);
ExpectTime(tp, tz, 1983, 10, 30, 1, 59, 59, -4 * 3600, true, "EDT");
tp += absl::time_internal::cctz::seconds(1);
ExpectTime(tp, tz, 1983, 10, 30, 1, 0, 0, -5 * 3600, false, "EST");
// After the last transition.
tp = convert(civil_second(1983, 12, 31, 23, 59, 59), tz);
ExpectTime(tp, tz, 1983, 12, 31, 23, 59, 59, -5 * 3600, false, "EST");
}
TEST(TimeZoneEdgeCase, WET) {
// Cover some non-existent times within forward transitions.
const time_zone tz = LoadZone("WET");
// Before the first transition.
auto tp = convert(civil_second(1977, 1, 1, 0, 0, 0), tz);
ExpectTime(tp, tz, 1977, 1, 1, 0, 0, 0, 0, false, "WET");
// Over the first transition.
// 228877199 == Sun, 3 Apr 1977 00:59:59 +0000 (WET)
// 228877200 == Sun, 3 Apr 1977 02:00:00 +0100 (WEST)
tp = convert(civil_second(1977, 4, 3, 0, 59, 59), tz);
ExpectTime(tp, tz, 1977, 4, 3, 0, 59, 59, 0, false, "WET");
tp += absl::time_internal::cctz::seconds(1);
ExpectTime(tp, tz, 1977, 4, 3, 2, 0, 0, 1 * 3600, true, "WEST");
// A non-existent time within the first transition.
time_zone::civil_lookup cl1 = tz.lookup(civil_second(1977, 4, 3, 1, 15, 0));
EXPECT_EQ(time_zone::civil_lookup::SKIPPED, cl1.kind);
ExpectTime(cl1.pre, tz, 1977, 4, 3, 2, 15, 0, 1 * 3600, true, "WEST");
ExpectTime(cl1.trans, tz, 1977, 4, 3, 2, 0, 0, 1 * 3600, true, "WEST");
ExpectTime(cl1.post, tz, 1977, 4, 3, 0, 15, 0, 0 * 3600, false, "WET");
// A non-existent time within the second forward transition.
time_zone::civil_lookup cl2 = tz.lookup(civil_second(1978, 4, 2, 1, 15, 0));
EXPECT_EQ(time_zone::civil_lookup::SKIPPED, cl2.kind);
ExpectTime(cl2.pre, tz, 1978, 4, 2, 2, 15, 0, 1 * 3600, true, "WEST");
ExpectTime(cl2.trans, tz, 1978, 4, 2, 2, 0, 0, 1 * 3600, true, "WEST");
ExpectTime(cl2.post, tz, 1978, 4, 2, 0, 15, 0, 0 * 3600, false, "WET");
}
TEST(TimeZoneEdgeCase, FixedOffsets) {
const time_zone gmtm5 = LoadZone("Etc/GMT+5"); // -0500
auto tp = convert(civil_second(1970, 1, 1, 0, 0, 0), gmtm5);
ExpectTime(tp, gmtm5, 1970, 1, 1, 0, 0, 0, -5 * 3600, false, "-05");
EXPECT_EQ(chrono::system_clock::from_time_t(5 * 3600), tp);
const time_zone gmtp5 = LoadZone("Etc/GMT-5"); // +0500
tp = convert(civil_second(1970, 1, 1, 0, 0, 0), gmtp5);
ExpectTime(tp, gmtp5, 1970, 1, 1, 0, 0, 0, 5 * 3600, false, "+05");
EXPECT_EQ(chrono::system_clock::from_time_t(-5 * 3600), tp);
}
TEST(TimeZoneEdgeCase, NegativeYear) {
// Tests transition from year 0 (aka 1BCE) to year -1.
const time_zone tz = utc_time_zone();
auto tp = convert(civil_second(0, 1, 1, 0, 0, 0), tz);
ExpectTime(tp, tz, 0, 1, 1, 0, 0, 0, 0 * 3600, false, "UTC");
EXPECT_EQ(weekday::saturday, get_weekday(civil_day(convert(tp, tz))));
tp -= absl::time_internal::cctz::seconds(1);
ExpectTime(tp, tz, -1, 12, 31, 23, 59, 59, 0 * 3600, false, "UTC");
EXPECT_EQ(weekday::friday, get_weekday(civil_day(convert(tp, tz))));
}
TEST(TimeZoneEdgeCase, UTC32bitLimit) {
const time_zone tz = utc_time_zone();
// Limits of signed 32-bit time_t
//
// 2147483647 == Tue, 19 Jan 2038 03:14:07 +0000 (UTC)
// 2147483648 == Tue, 19 Jan 2038 03:14:08 +0000 (UTC)
auto tp = convert(civil_second(2038, 1, 19, 3, 14, 7), tz);
ExpectTime(tp, tz, 2038, 1, 19, 3, 14, 7, 0 * 3600, false, "UTC");
tp += absl::time_internal::cctz::seconds(1);
ExpectTime(tp, tz, 2038, 1, 19, 3, 14, 8, 0 * 3600, false, "UTC");
}
TEST(TimeZoneEdgeCase, UTC5DigitYear) {
const time_zone tz = utc_time_zone();
// Rollover to 5-digit year
//
// 253402300799 == Fri, 31 Dec 9999 23:59:59 +0000 (UTC)
// 253402300800 == Sat, 1 Jan 1000 00:00:00 +0000 (UTC)
auto tp = convert(civil_second(9999, 12, 31, 23, 59, 59), tz);
ExpectTime(tp, tz, 9999, 12, 31, 23, 59, 59, 0 * 3600, false, "UTC");
tp += absl::time_internal::cctz::seconds(1);
ExpectTime(tp, tz, 10000, 1, 1, 0, 0, 0, 0 * 3600, false, "UTC");
}
} // namespace cctz
} // namespace time_internal
} // namespace absl
