From 5b70a8910b2e6fb0ce5193a41873139a126d2f7f Mon Sep 17 00:00:00 2001 From: Abseil Team Date: Mon, 15 Oct 2018 11:30:24 -0700 Subject: Export of internal Abseil changes. -- f4e870453d02106c2685e0461816469a4704ad25 by Abseil Team : Expose TimeZone::NextTransition() and PrevTransition() now that we have absl::CivilSecond support in time.h. Note that these are for informational purposes only. General time code should not care when offset changes occur. PiperOrigin-RevId: 217177292 -- cfadd275c7333f7c27c4d682b9d167010d874e69 by Abseil Team : Import of CCTZ from GitHub. PiperOrigin-RevId: 217153577 -- 6ff5b8c61a1239b9c0478a7c62bcd2844b310307 by Jon Cohen : Fix code examples in hash_testing.h. Includes random clang-format changes. PiperOrigin-RevId: 216898995 -- de124129d27f4627dabe193a10bf106a11783fba by Shaindel Schwartz : Add contribution guidelines describing how we decide whether to include an API in Abseil. PiperOrigin-RevId: 216886943 GitOrigin-RevId: f4e870453d02106c2685e0461816469a4704ad25 Change-Id: Ib9c6706f5bf931b71c0357bf1342053a3bee8ff7 --- absl/time/time_test.cc | 63 ++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 63 insertions(+) (limited to 'absl/time/time_test.cc') diff --git a/absl/time/time_test.cc b/absl/time/time_test.cc index feca45873814..4d71070925f5 100644 --- a/absl/time/time_test.cc +++ b/absl/time/time_test.cc @@ -1135,4 +1135,67 @@ TEST(Time, LegacyDateTime) { EXPECT_EQ("2014-10-29 22:58:59", absl::FormatTime(ymdhms, t, utc)); } +TEST(Time, NextTransitionUTC) { + const auto tz = absl::UTCTimeZone(); + absl::TimeZone::CivilTransition trans; + + auto t = absl::InfinitePast(); + EXPECT_FALSE(tz.NextTransition(t, &trans)); + + t = absl::InfiniteFuture(); + EXPECT_FALSE(tz.NextTransition(t, &trans)); +} + +TEST(Time, PrevTransitionUTC) { + const auto tz = absl::UTCTimeZone(); + absl::TimeZone::CivilTransition trans; + + auto t = absl::InfiniteFuture(); + EXPECT_FALSE(tz.PrevTransition(t, &trans)); + + t = absl::InfinitePast(); + EXPECT_FALSE(tz.PrevTransition(t, &trans)); +} + +TEST(Time, NextTransitionNYC) { + const auto tz = absl::time_internal::LoadTimeZone("America/New_York"); + absl::TimeZone::CivilTransition trans; + + auto t = absl::FromCivil(absl::CivilSecond(2018, 6, 30, 0, 0, 0), tz); + EXPECT_TRUE(tz.NextTransition(t, &trans)); + EXPECT_EQ(absl::CivilSecond(2018, 11, 4, 2, 0, 0), trans.from); + EXPECT_EQ(absl::CivilSecond(2018, 11, 4, 1, 0, 0), trans.to); + + t = absl::InfiniteFuture(); + EXPECT_FALSE(tz.NextTransition(t, &trans)); + + t = absl::InfinitePast(); + EXPECT_TRUE(tz.NextTransition(t, &trans)); + if (trans.from == absl::CivilSecond(1918, 03, 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(absl::CivilSecond(1918, 3, 31, 3, 0, 0), trans.to); + } else { + EXPECT_EQ(absl::CivilSecond(1883, 11, 18, 12, 3, 58), trans.from); + EXPECT_EQ(absl::CivilSecond(1883, 11, 18, 12, 0, 0), trans.to); + } +} + +TEST(Time, PrevTransitionNYC) { + const auto tz = absl::time_internal::LoadTimeZone("America/New_York"); + absl::TimeZone::CivilTransition trans; + + auto t = absl::FromCivil(absl::CivilSecond(2018, 6, 30, 0, 0, 0), tz); + EXPECT_TRUE(tz.PrevTransition(t, &trans)); + EXPECT_EQ(absl::CivilSecond(2018, 3, 11, 2, 0, 0), trans.from); + EXPECT_EQ(absl::CivilSecond(2018, 3, 11, 3, 0, 0), trans.to); + + t = absl::InfinitePast(); + EXPECT_FALSE(tz.PrevTransition(t, &trans)); + + t = absl::InfiniteFuture(); + EXPECT_TRUE(tz.PrevTransition(t, &trans)); + // We have a transition but we don't know which one. +} + } // namespace -- cgit 1.4.1