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Export of internal Abseil changes.

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f4e870453d02106c2685e0461816469a4704ad25 by Abseil Team <absl-team@google.com>:

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

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cfadd275c7333f7c27c4d682b9d167010d874e69 by Abseil Team <absl-team@google.com>:

Import of CCTZ from GitHub.

PiperOrigin-RevId: 217153577

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6ff5b8c61a1239b9c0478a7c62bcd2844b310307 by Jon Cohen <cohenjon@google.com>:

Fix code examples in hash_testing.h.  Includes random clang-format changes.

PiperOrigin-RevId: 216898995

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de124129d27f4627dabe193a10bf106a11783fba by Shaindel Schwartz <shaindel@google.com>:

Add contribution guidelines describing how we decide whether to include an API in Abseil.

PiperOrigin-RevId: 216886943
GitOrigin-RevId: f4e870453d02106c2685e0461816469a4704ad25
Change-Id: Ib9c6706f5bf931b71c0357bf1342053a3bee8ff7
This commit is contained in:
Abseil Team 2018-10-15 11:30:24 -07:00 • committed by Xiaoyi Zhang
parent a00bdd176d
commit 5b70a8910b
6 changed files with 193 additions and 19 deletions
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63
absl/time/time_test.cc
View file

@ -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