diff options
Diffstat (limited to 'absl/time/time_test.cc')
| -rw-r--r-- | absl/time/time_test.cc | 61 |
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 = |