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-rw-r--r--absl/time/internal/cctz/src/time_zone_lookup_test.cc456
1 files changed, 314 insertions, 142 deletions
diff --git a/absl/time/internal/cctz/src/time_zone_lookup_test.cc b/absl/time/internal/cctz/src/time_zone_lookup_test.cc
index a1b6c687..e0e355ee 100644
--- a/absl/time/internal/cctz/src/time_zone_lookup_test.cc
+++ b/absl/time/internal/cctz/src/time_zone_lookup_test.cc
@@ -16,7 +16,9 @@
#include <chrono>
#include <cstddef>
+#include <cstdlib>
#include <future>
+#include <limits>
#include <string>
#include <thread>
#include <vector>
@@ -24,17 +26,10 @@
#include "absl/time/internal/cctz/include/cctz/civil_time.h"
#include "gtest/gtest.h"
-using std::chrono::time_point_cast;
-using std::chrono::system_clock;
-using std::chrono::nanoseconds;
-using std::chrono::microseconds;
-using std::chrono::milliseconds;
-using std::chrono::seconds;
-using std::chrono::minutes;
-using std::chrono::hours;
+namespace chrono = std::chrono;
namespace absl {
-inline namespace lts_2018_06_20 {
+inline namespace lts_2018_12_18 {
namespace time_internal {
namespace cctz {
@@ -659,6 +654,17 @@ time_zone LoadZone(const std::string& name) {
/* EXPECT_STREQ(zone, al.abbr); */ \
} while (0)
+// These tests sometimes run on platforms that have zoneinfo data so old
+// that the transition we are attempting to check does not exist, most
+// notably Android emulators. Fortunately, AndroidZoneInfoSource supports
+// time_zone::version() so, in cases where we've learned that it matters,
+// we can make the check conditionally.
+int VersionCmp(time_zone tz, const std::string& target) {
+ std::string version = tz.version();
+ if (version.empty() && !target.empty()) return 1; // unknown > known
+ return version.compare(target);
+}
+
} // namespace
TEST(TimeZones, LoadZonesConcurrently) {
@@ -716,13 +722,13 @@ TEST(TimeZone, NamedTimeZones) {
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(sys_seconds::zero());
+ 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(hours(3) + minutes(25) + seconds(45));
+ 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(-(hours(12) + minutes(34) + seconds(56)));
+ 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());
}
@@ -732,19 +738,19 @@ TEST(TimeZone, Failures) {
tz = LoadZone("America/Los_Angeles");
EXPECT_FALSE(load_time_zone("Invalid/TimeZone", &tz));
- EXPECT_EQ(system_clock::from_time_t(0),
+ 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(system_clock::from_time_t(0),
+ 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(system_clock::from_time_t(0),
+ EXPECT_EQ(chrono::system_clock::from_time_t(0),
convert(civil_second(1970, 1, 1, 0, 0, 0), tz)); // UTC
}
@@ -759,7 +765,7 @@ TEST(TimeZone, Equality) {
EXPECT_EQ(implicit_utc, explicit_utc);
EXPECT_EQ(implicit_utc.name(), explicit_utc.name());
- const time_zone fixed_zero = fixed_time_zone(sys_seconds::zero());
+ 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);
@@ -767,23 +773,25 @@ TEST(TimeZone, Equality) {
EXPECT_EQ(fixed_utc, LoadZone(fixed_utc.name()));
EXPECT_EQ(fixed_utc, explicit_utc);
- const time_zone fixed_pos =
- fixed_time_zone(hours(3) + minutes(25) + seconds(45));
+ 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(-(hours(12) + minutes(34) + seconds(56)));
+ 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(hours(24));
+ 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(hours(24) + seconds(1));
+ 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(seconds(1)), fixed_time_zone(seconds(1)));
+ 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()));
@@ -796,40 +804,43 @@ TEST(TimeZone, Equality) {
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 = system_clock::time_point() - system_clock::from_time_t(0);
- EXPECT_EQ(system_clock::time_point::duration::zero(), diff % seconds(1));
+ 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 = system_clock::from_time_t(0);
+ const auto t0 = chrono::system_clock::from_time_t(0);
- ExpectTime(time_point_cast<nanoseconds>(t0), utc,
+ ExpectTime(chrono::time_point_cast<chrono::nanoseconds>(t0), utc,
1970, 1, 1, 0, 0, 0, 0, false, "UTC");
- ExpectTime(time_point_cast<microseconds>(t0), utc,
+ ExpectTime(chrono::time_point_cast<chrono::microseconds>(t0), utc,
1970, 1, 1, 0, 0, 0, 0, false, "UTC");
- ExpectTime(time_point_cast<milliseconds>(t0), utc,
+ ExpectTime(chrono::time_point_cast<chrono::milliseconds>(t0), utc,
1970, 1, 1, 0, 0, 0, 0, false, "UTC");
- ExpectTime(time_point_cast<seconds>(t0), utc,
+ ExpectTime(chrono::time_point_cast<chrono::seconds>(t0), utc,
1970, 1, 1, 0, 0, 0, 0, false, "UTC");
- ExpectTime(time_point_cast<sys_seconds>(t0), utc,
+ ExpectTime(chrono::time_point_cast<absl::time_internal::cctz::seconds>(t0), utc,
1970, 1, 1, 0, 0, 0, 0, false, "UTC");
- ExpectTime(time_point_cast<minutes>(t0), utc,
+ ExpectTime(chrono::time_point_cast<chrono::minutes>(t0), utc,
1970, 1, 1, 0, 0, 0, 0, false, "UTC");
- ExpectTime(time_point_cast<hours>(t0), 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 = system_clock::from_time_t(0);
+ 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 = system_clock::from_time_t(0) - milliseconds(500);
+ 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))));
}
@@ -837,15 +848,16 @@ TEST(BreakTime, LocalTimeInUTCUnaligned) {
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 = system_clock::from_time_t(536457599);
+ 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 sys_seconds offset = -(hours(8) + minutes(33) + seconds(47));
+ 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 = system_clock::from_time_t(0);
+ 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))));
@@ -853,52 +865,52 @@ TEST(TimeZoneImpl, LocalTimeInFixed) {
TEST(BreakTime, LocalTimeInNewYork) {
const time_zone tz = LoadZone("America/New_York");
- const auto tp = system_clock::from_time_t(45);
+ 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 = system_clock::from_time_t(1380855729);
+ 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 = system_clock::from_time_t(90);
+ 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<nanoseconds> tp_ns =
+ 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<microseconds> tp_us =
+ 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<milliseconds> tp_ms =
+ 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<seconds> tp_s =
+ 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<sys_seconds> tp_s64 =
+ 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 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<minutes> tp_m =
- time_point_cast<minutes>(
+ // 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<hours> tp_h =
- time_point_cast<hours>(
+ 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));
}
@@ -906,7 +918,7 @@ TEST(MakeTime, TimePointResolution) {
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(system_clock::from_time_t(1234567890), tp);
+ 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
@@ -916,71 +928,234 @@ TEST(MakeTime, Normalization) {
EXPECT_EQ(tp, convert(civil_second(2009, 2, 13, 18, 30, 90), tz)); // second
}
-// NOTE: Run this with --copt=-ftrapv to detect overflow problems.
+// NOTE: Run this with -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(hours(14));
- const time_zone west = fixed_time_zone(-hours(14));
- time_point<sys_seconds> tp;
+ 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<sys_seconds> value from below.
+ // 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<sys_seconds>::max(), tp);
+ 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<sys_seconds>::max(), tp);
+ EXPECT_EQ(time_point<absl::time_internal::cctz::seconds>::max(), tp);
tp = convert(civil_second::max(), utc);
- EXPECT_EQ(time_point<sys_seconds>::max(), tp);
+ 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<sys_seconds>::max(), tp);
+ 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<sys_seconds>::max(), tp);
+ EXPECT_EQ(time_point<absl::time_internal::cctz::seconds>::max(), tp);
tp = convert(civil_second::max(), east);
- EXPECT_EQ(time_point<sys_seconds>::max(), tp);
+ 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<sys_seconds>::max(), tp);
+ 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<sys_seconds>::max(), tp);
+ EXPECT_EQ(time_point<absl::time_internal::cctz::seconds>::max(), tp);
tp = convert(civil_second::max(), west);
- EXPECT_EQ(time_point<sys_seconds>::max(), tp);
+ EXPECT_EQ(time_point<absl::time_internal::cctz::seconds>::max(), tp);
- // Approach the minimal time_point<sys_seconds> value from above.
+ // 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<sys_seconds>::min(), tp);
+ 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<sys_seconds>::min(), tp);
+ EXPECT_EQ(time_point<absl::time_internal::cctz::seconds>::min(), tp);
tp = convert(civil_second::min(), utc);
- EXPECT_EQ(time_point<sys_seconds>::min(), tp);
+ 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<sys_seconds>::min(), tp);
+ 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<sys_seconds>::min(), tp);
+ EXPECT_EQ(time_point<absl::time_internal::cctz::seconds>::min(), tp);
tp = convert(civil_second::min(), east);
- EXPECT_EQ(time_point<sys_seconds>::min(), tp);
+ 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<sys_seconds>::min(), tp);
+ 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<sys_seconds>::min(), tp);
+ EXPECT_EQ(time_point<absl::time_internal::cctz::seconds>::min(), tp);
tp = convert(civil_second::min(), west);
- EXPECT_EQ(time_point<sys_seconds>::min(), tp);
+ EXPECT_EQ(time_point<absl::time_internal::cctz::seconds>::min(), tp);
+
+ // Some similar checks for the "libc" time-zone implementation.
+ if (sizeof(std::time_t) >= 8) {
+ // Checks that "tm_year + 1900", as used by the "libc" implementation,
+ // can produce year values beyond the range on an int without overflow.
+#if defined(_WIN32) || defined(_WIN64)
+ // localtime_s() and gmtime_s() don't believe in years outside [1970:3000].
+#else
+ const time_zone utc = LoadZone("libc:UTC");
+ const year_t max_tm_year = year_t{std::numeric_limits<int>::max()} + 1900;
+ tp = convert(civil_second(max_tm_year, 12, 31, 23, 59, 59), utc);
+ EXPECT_EQ("2147485547-12-31T23:59:59+00:00", format(RFC3339, tp, utc));
+ const year_t min_tm_year = year_t{std::numeric_limits<int>::min()} + 1900;
+ tp = convert(civil_second(min_tm_year, 1, 1, 0, 0, 0), utc);
+ EXPECT_EQ("-2147481748-01-01T00:00:00+00:00", format(RFC3339, tp, utc));
+#endif
+ }
+}
+
+TEST(MakeTime, LocalTimeLibC) {
+ // Checks that cctz and libc agree on transition points in [1970:2037].
+ //
+ // We limit this test case to environments where:
+ // 1) we know how to change the time zone used by localtime()/mktime(),
+ // 2) cctz and localtime()/mktime() will use similar-enough tzdata, and
+ // 3) we have some idea about how mktime() behaves during transitions.
+#if defined(__linux__)
+ const char* const ep = getenv("TZ");
+ std::string tz_name = (ep != nullptr) ? ep : "";
+ for (const char* const* np = kTimeZoneNames; *np != nullptr; ++np) {
+ ASSERT_EQ(0, setenv("TZ", *np, 1)); // change what "localtime" means
+ const auto zi = local_time_zone();
+ const auto lc = LoadZone("libc:localtime");
+ time_zone::civil_transition trans;
+ for (auto tp = zi.lookup(civil_second()).trans;
+ zi.next_transition(tp, &trans);
+ tp = zi.lookup(trans.to).trans) {
+ const auto fcl = zi.lookup(trans.from);
+ const auto tcl = zi.lookup(trans.to);
+ civil_second cs; // compare cs in zi and lc
+ if (fcl.kind == time_zone::civil_lookup::UNIQUE) {
+ if (tcl.kind == time_zone::civil_lookup::UNIQUE) {
+ // Both unique; must be an is_dst or abbr change.
+ ASSERT_EQ(trans.from, trans.to);
+ const auto trans = fcl.trans;
+ const auto tal = zi.lookup(trans);
+ const auto tprev = trans - absl::time_internal::cctz::seconds(1);
+ const auto pal = zi.lookup(tprev);
+ if (pal.is_dst == tal.is_dst) {
+ ASSERT_STRNE(pal.abbr, tal.abbr);
+ }
+ continue;
+ }
+ ASSERT_EQ(time_zone::civil_lookup::REPEATED, tcl.kind);
+ cs = trans.to;
+ } else {
+ ASSERT_EQ(time_zone::civil_lookup::UNIQUE, tcl.kind);
+ ASSERT_EQ(time_zone::civil_lookup::SKIPPED, fcl.kind);
+ cs = trans.from;
+ }
+ if (cs.year() > 2037) break; // limit test time (and to 32-bit time_t)
+ const auto cl_zi = zi.lookup(cs);
+ if (zi.lookup(cl_zi.pre).is_dst == zi.lookup(cl_zi.post).is_dst) {
+ // The "libc" implementation cannot correctly classify transitions
+ // that don't change the "tm_isdst" flag. In Europe/Volgograd, for
+ // example, there is a SKIPPED transition from +03 to +04 with dst=F
+ // on both sides ...
+ // 1540681199 = 2018-10-28 01:59:59 +03:00:00 [dst=F off=10800]
+ // 1540681200 = 2018-10-28 03:00:00 +04:00:00 [dst=F off=14400]
+ // but std::mktime(2018-10-28 02:00:00, tm_isdst=0) fails, unlike,
+ // say, the similar Europe/Chisinau transition from +02 to +03 ...
+ // 1521935999 = 2018-03-25 01:59:59 +02:00:00 [dst=F off=7200]
+ // 1521936000 = 2018-03-25 03:00:00 +03:00:00 [dst=T off=10800]
+ // where std::mktime(2018-03-25 02:00:00, tm_isdst=0) succeeds and
+ // returns 1521936000.
+ continue;
+ }
+ if (cs == civil_second(2037, 10, 4, 2, 0, 0)) {
+ const std::string tzname = *np;
+ if (tzname == "Africa/Casablanca" || tzname == "Africa/El_Aaiun") {
+ // The "libc" implementation gets this transition wrong (at least
+ // until 2018g when it was removed), returning an offset of 3600
+ // instead of 0. TODO: Revert this when 2018g is ubiquitous.
+ continue;
+ }
+ }
+ const auto cl_lc = lc.lookup(cs);
+ SCOPED_TRACE(testing::Message() << "For " << cs << " in " << *np);
+ EXPECT_EQ(cl_zi.kind, cl_lc.kind);
+ EXPECT_EQ(cl_zi.pre, cl_lc.pre);
+ EXPECT_EQ(cl_zi.trans, cl_lc.trans);
+ EXPECT_EQ(cl_zi.post, cl_lc.post);
+ }
+ }
+ if (ep == nullptr) {
+ ASSERT_EQ(0, unsetenv("TZ"));
+ } else {
+ ASSERT_EQ(0, setenv("TZ", tz_name.c_str(), 1));
+ }
+#endif
+}
+
+TEST(NextTransition, UTC) {
+ const auto tz = utc_time_zone();
+ time_zone::civil_transition trans;
+
+ auto tp = time_point<absl::time_internal::cctz::seconds>::min();
+ EXPECT_FALSE(tz.next_transition(tp, &trans));
+
+ tp = time_point<absl::time_internal::cctz::seconds>::max();
+ EXPECT_FALSE(tz.next_transition(tp, &trans));
+}
+
+TEST(PrevTransition, UTC) {
+ const auto tz = utc_time_zone();
+ time_zone::civil_transition trans;
+
+ auto tp = time_point<absl::time_internal::cctz::seconds>::max();
+ EXPECT_FALSE(tz.prev_transition(tp, &trans));
+
+ tp = time_point<absl::time_internal::cctz::seconds>::min();
+ EXPECT_FALSE(tz.prev_transition(tp, &trans));
+}
+
+TEST(NextTransition, AmericaNewYork) {
+ const auto tz = LoadZone("America/New_York");
+ time_zone::civil_transition trans;
+
+ auto tp = convert(civil_second(2018, 6, 30, 0, 0, 0), tz);
+ EXPECT_TRUE(tz.next_transition(tp, &trans));
+ EXPECT_EQ(civil_second(2018, 11, 4, 2, 0, 0), trans.from);
+ EXPECT_EQ(civil_second(2018, 11, 4, 1, 0, 0), trans.to);
+
+ tp = time_point<absl::time_internal::cctz::seconds>::max();
+ EXPECT_FALSE(tz.next_transition(tp, &trans));
+
+ tp = time_point<absl::time_internal::cctz::seconds>::min();
+ EXPECT_TRUE(tz.next_transition(tp, &trans));
+ if (trans.from == civil_second(1918, 3, 31, 2, 0, 0)) {
+ // It looks like the tzdata is only 32 bit (probably macOS),
+ // which bottoms out at 1901-12-13T20:45:52+00:00.
+ EXPECT_EQ(civil_second(1918, 3, 31, 3, 0, 0), trans.to);
+ } else {
+ EXPECT_EQ(civil_second(1883, 11, 18, 12, 3, 58), trans.from);
+ EXPECT_EQ(civil_second(1883, 11, 18, 12, 0, 0), trans.to);
+ }
+}
+
+TEST(PrevTransition, AmericaNewYork) {
+ const auto tz = LoadZone("America/New_York");
+ time_zone::civil_transition trans;
+
+ auto tp = convert(civil_second(2018, 6, 30, 0, 0, 0), tz);
+ EXPECT_TRUE(tz.prev_transition(tp, &trans));
+ EXPECT_EQ(civil_second(2018, 3, 11, 2, 0, 0), trans.from);
+ EXPECT_EQ(civil_second(2018, 3, 11, 3, 0, 0), trans.to);
+
+ tp = time_point<absl::time_internal::cctz::seconds>::min();
+ EXPECT_FALSE(tz.prev_transition(tp, &trans));
+
+ tp = time_point<absl::time_internal::cctz::seconds>::max();
+ EXPECT_TRUE(tz.prev_transition(tp, &trans));
+ // We have a transition but we don't know which one.
}
TEST(TimeZoneEdgeCase, AmericaNewYork) {
@@ -989,13 +1164,13 @@ TEST(TimeZoneEdgeCase, AmericaNewYork) {
// 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 += seconds(1);
+ 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 += seconds(1);
+ tp += absl::time_internal::cctz::seconds(1);
ExpectTime(tp, tz, 2013, 11, 3, 1, 0, 0, -5 * 3600, false, "EST");
}
@@ -1005,13 +1180,13 @@ TEST(TimeZoneEdgeCase, AmericaLosAngeles) {
// 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 += seconds(1);
+ 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 += seconds(1);
+ tp += absl::time_internal::cctz::seconds(1);
ExpectTime(tp, tz, 2013, 11, 3, 1, 0, 0, -8 * 3600, false, "PST");
}
@@ -1021,13 +1196,13 @@ TEST(TimeZoneEdgeCase, ArizonaNoTransition) {
// 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 += seconds(1);
+ 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 += seconds(1);
+ tp += absl::time_internal::cctz::seconds(1);
ExpectTime(tp, tz, 2013, 11, 3, 2, 0, 0, -7 * 3600, false, "MST");
}
@@ -1040,7 +1215,7 @@ TEST(TimeZoneEdgeCase, AsiaKathmandu) {
// 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 += seconds(1);
+ tp += absl::time_internal::cctz::seconds(1);
ExpectTime(tp, tz, 1986, 1, 1, 0, 15, 0, 5.75 * 3600, false, "+0545");
}
@@ -1053,14 +1228,14 @@ TEST(TimeZoneEdgeCase, PacificChatham) {
// 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 += seconds(1);
+ 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 += seconds(1);
+ tp += absl::time_internal::cctz::seconds(1);
ExpectTime(tp, tz, 2013, 9, 29, 3, 45, 0, 13.75 * 3600, true, "+1345");
}
@@ -1073,14 +1248,14 @@ TEST(TimeZoneEdgeCase, AustraliaLordHowe) {
// 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 += seconds(1);
+ 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 += seconds(1);
+ tp += absl::time_internal::cctz::seconds(1);
ExpectTime(tp, tz, 2013, 10, 6, 2, 30, 0, 11 * 3600, true, "+11");
}
@@ -1098,7 +1273,7 @@ TEST(TimeZoneEdgeCase, PacificApia) {
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 += seconds(1);
+ 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))));
}
@@ -1106,35 +1281,31 @@ TEST(TimeZoneEdgeCase, PacificApia) {
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 += seconds(1);
- ExpectTime(tp, tz, 2014, 5, 16, 1, 0, 0, 3 * 3600, true, "EEST");
-#endif
+ if (VersionCmp(tz, "2014c") >= 0) {
+ // 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");
+ }
}
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 += seconds(1);
- ExpectTime(tp, tz, 1972, 1, 7, 0, 44, 30, 0 * 60, false, "GMT");
-#endif
+ if (VersionCmp(tz, "2017b") >= 0) {
+ // 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");
+ }
}
TEST(TimeZoneEdgeCase, AmericaJamaica) {
@@ -1146,30 +1317,31 @@ TEST(TimeZoneEdgeCase, AmericaJamaica) {
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 += seconds(1);
- ExpectTime(tp, tz, 1890, 1, 1, 0, 0, 0, -18430, false, "KMT");
-#endif
+ if (!tz.version().empty() && VersionCmp(tz, "2018d") >= 0) {
+ // We avoid the expectations on the -18430 offset below unless we are
+ // certain we have commit 907241e (Fix off-by-1 error for Jamaica and
+ // T&C before 1913) from 2018d. TODO: Remove the "version() not empty"
+ // part when 2018d is generally available from /usr/share/zoneinfo.
+ auto tp = convert(civil_second(1889, 12, 31, 0, 0, 0), tz);
+ 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");
+ }
// 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);
+ auto 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 += seconds(1);
+ tp += absl::time_internal::cctz::seconds(1);
ExpectTime(tp, tz, 1983, 10, 30, 1, 0, 0, -5 * 3600, false, "EST");
// After the last transition.
@@ -1190,7 +1362,7 @@ TEST(TimeZoneEdgeCase, 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 += seconds(1);
+ 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.
@@ -1212,12 +1384,12 @@ 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(system_clock::from_time_t(5 * 3600), tp);
+ 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(system_clock::from_time_t(-5 * 3600), tp);
+ EXPECT_EQ(chrono::system_clock::from_time_t(-5 * 3600), tp);
}
TEST(TimeZoneEdgeCase, NegativeYear) {
@@ -1226,7 +1398,7 @@ TEST(TimeZoneEdgeCase, NegativeYear) {
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 -= seconds(1);
+ 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))));
}
@@ -1240,7 +1412,7 @@ TEST(TimeZoneEdgeCase, UTC32bitLimit) {
// 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 += seconds(1);
+ tp += absl::time_internal::cctz::seconds(1);
ExpectTime(tp, tz, 2038, 1, 19, 3, 14, 8, 0 * 3600, false, "UTC");
}
@@ -1253,11 +1425,11 @@ TEST(TimeZoneEdgeCase, UTC5DigitYear) {
// 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 += seconds(1);
+ 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
-} // inline namespace lts_2018_06_20
+} // inline namespace lts_2018_12_18
} // namespace absl
generated by cgit v1.2.3 (git 2.39.1) at 2024-05-15 04:57:25 +0000