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authorGravatar Abseil Team <absl-team@google.com>2017-09-24 08:20:48 -0700
committerGravatar Derek Mauro <dmauro@google.com>2017-09-25 10:12:29 -0400
commitcf6ab6bb2b800fae859ccc735f398d22a7336a00 (patch)
treeee16a94d16734d11f9e91518038e2712ca025433 /absl/time/time_test.cc
parent53c239d1fc161975dad32c654e1f42c0ec42f547 (diff)
Changes imported from Abseil "staging" branch:
- b527a3e4b36b644ac424e3c525b1cd393f6f6c40 Fix some typos in the usage examples by Jorg Brown <jorg@google.com> - 82be4a9adf3bb0ddafc0d46274969c99afffe870 Fix typo in optional.h comment. by Abseil Team <absl-team@google.com> - d6ee63bf8fc51fba074c23b33cebc28c808d7f07 Remove internal-only identifiers from code. by Daniel Katz <katzdm@google.com> - f9c3ad2f0d73f53b21603638af8b4bed636e79f4 Use easier understandable names for absl::StartsWith and ... by Abseil Team <absl-team@google.com> - 7c16c14fefee89c927b8789d6043c4691bcffc9b Add -Wno-missing-prototypes back to the LLVM copts. by Derek Mauro <dmauro@google.com> - 2f4b7d2e50c7023240242f1e15db60ccd7e8768d IWYU | absl/strings by Juemin Yang <jueminyang@google.com> - a99cbcc1daa34a2d6a2bb26de275e05173cc77e9 IWYU | absl/type by Juemin Yang <jueminyang@google.com> - 12e1146d0fc76c071d7e0ebaabb62f0a984fae66 Use LLVM_FLAGS and LLVM_TEST_FLAGS when --compiler=llvm. by Derek Mauro <dmauro@google.com> - cd6bea616abda558d0bace5bd77455662a233688 IWYU | absl/debugging by Juemin Yang <jueminyang@google.com> - d9a7382e59d46a8581b6b7a31cd5a48bb89326e9 IWYU | absl/synchronization by Juemin Yang <jueminyang@google.com> - 07ec7d6d5a4a666f4183c5d0ed9c342baa7b24bc IWYU | absl/numeric by Juemin Yang <jueminyang@google.com> - 12bfe40051f4270f8707e191af5652f83f2f750c Remove the RoundTrip{Float,Double}ToBuffer routines from ... by Jorg Brown <jorg@google.com> - eeb4fd67c9d97f66cb9475c3c5e51ab132f1c810 Adds conversion functions for converting between absl/tim... by Greg Miller <jgm@google.com> - 59a2108d05d4ea85dc5cc11e49b2cd2335d4295a Change Substitute to use %.6g formatting rather than 15/1... by Jorg Brown <jorg@google.com> - 394becb48e0fcd161642cdaac5120d32567e0ef8 IWYU | absl/meta by Juemin Yang <jueminyang@google.com> - 1e5da6e8da336699b2469dcf6dda025b9b0ec4c9 Rewrite atomic_hook.h to not use std::atomic<T*> under Wi... by Greg Falcon <gfalcon@google.com> GitOrigin-RevId: b527a3e4b36b644ac424e3c525b1cd393f6f6c40 Change-Id: I14e331d91c956ef045ac7927091a9f179716de0c
Diffstat (limited to 'absl/time/time_test.cc')
-rw-r--r--absl/time/time_test.cc61
1 files changed, 61 insertions, 0 deletions
diff --git a/absl/time/time_test.cc b/absl/time/time_test.cc
index 51b9e53d..64083880 100644
--- a/absl/time/time_test.cc
+++ b/absl/time/time_test.cc
@@ -14,6 +14,7 @@
#include "absl/time/time.h"
+#include <chrono> // NOLINT(build/c++11)
#include <cstring>
#include <ctime>
#include <iomanip>
@@ -489,6 +490,66 @@ TEST(Time, RoundtripConversion) {
#undef TEST_CONVERSION_ROUND_TRIP
}
+template <typename Duration>
+std::chrono::system_clock::time_point MakeChronoUnixTime(const Duration& d) {
+ return std::chrono::system_clock::from_time_t(0) + d;
+}
+
+TEST(Time, FromChrono) {
+ EXPECT_EQ(absl::FromTimeT(-1),
+ absl::FromChrono(std::chrono::system_clock::from_time_t(-1)));
+ EXPECT_EQ(absl::FromTimeT(0),
+ absl::FromChrono(std::chrono::system_clock::from_time_t(0)));
+ EXPECT_EQ(absl::FromTimeT(1),
+ absl::FromChrono(std::chrono::system_clock::from_time_t(1)));
+
+ EXPECT_EQ(
+ absl::FromUnixMillis(-1),
+ absl::FromChrono(MakeChronoUnixTime(std::chrono::milliseconds(-1))));
+ EXPECT_EQ(absl::FromUnixMillis(0),
+ absl::FromChrono(MakeChronoUnixTime(std::chrono::milliseconds(0))));
+ EXPECT_EQ(absl::FromUnixMillis(1),
+ absl::FromChrono(MakeChronoUnixTime(std::chrono::milliseconds(1))));
+
+ // Chrono doesn't define exactly its range and precision (neither does
+ // absl::Time), so let's simply test +/- ~100 years to make sure things work.
+ const auto century_sec = 60 * 60 * 24 * 365 * int64_t{100};
+ const auto century = std::chrono::seconds(century_sec);
+ const auto chrono_future = MakeChronoUnixTime(century);
+ const auto chrono_past = MakeChronoUnixTime(-century);
+ EXPECT_EQ(absl::FromUnixSeconds(century_sec),
+ absl::FromChrono(chrono_future));
+ EXPECT_EQ(absl::FromUnixSeconds(-century_sec), absl::FromChrono(chrono_past));
+
+ // Roundtrip them both back to chrono.
+ EXPECT_EQ(chrono_future,
+ absl::ToChronoTime(absl::FromUnixSeconds(century_sec)));
+ EXPECT_EQ(chrono_past,
+ absl::ToChronoTime(absl::FromUnixSeconds(-century_sec)));
+}
+
+TEST(Time, ToChronoTime) {
+ EXPECT_EQ(std::chrono::system_clock::from_time_t(-1),
+ absl::ToChronoTime(absl::FromTimeT(-1)));
+ EXPECT_EQ(std::chrono::system_clock::from_time_t(0),
+ absl::ToChronoTime(absl::FromTimeT(0)));
+ EXPECT_EQ(std::chrono::system_clock::from_time_t(1),
+ absl::ToChronoTime(absl::FromTimeT(1)));
+
+ EXPECT_EQ(MakeChronoUnixTime(std::chrono::milliseconds(-1)),
+ absl::ToChronoTime(absl::FromUnixMillis(-1)));
+ EXPECT_EQ(MakeChronoUnixTime(std::chrono::milliseconds(0)),
+ absl::ToChronoTime(absl::FromUnixMillis(0)));
+ EXPECT_EQ(MakeChronoUnixTime(std::chrono::milliseconds(1)),
+ absl::ToChronoTime(absl::FromUnixMillis(1)));
+
+ // Time before the Unix epoch should floor, not trunc.
+ const auto tick = absl::Nanoseconds(1) / 4;
+ EXPECT_EQ(std::chrono::system_clock::from_time_t(0) -
+ std::chrono::system_clock::duration(1),
+ absl::ToChronoTime(absl::UnixEpoch() - tick));
+}
+
TEST(Time, ConvertDateTime) {
const absl::TimeZone utc = absl::UTCTimeZone();
const absl::TimeZone goog =