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Diffstat (limited to 'absl/time/civil_time_test.cc')
| -rw-r--r-- | absl/time/civil_time_test.cc | 1073 |
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diff --git a/absl/time/civil_time_test.cc b/absl/time/civil_time_test.cc new file mode 100644 index 00000000..dc83d7a9 --- /dev/null +++ b/absl/time/civil_time_test.cc @@ -0,0 +1,1073 @@ +// Copyright 2018 The Abseil Authors. +// +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +#include "absl/time/civil_time.h" + +#include <limits> +#include <sstream> +#include <type_traits> + +#include "absl/base/macros.h" +#include "gtest/gtest.h" + +namespace { + +TEST(CivilTime, DefaultConstruction) { + absl::CivilSecond ss; + EXPECT_EQ("1970-01-01T00:00:00", absl::FormatCivilTime(ss)); + + absl::CivilMinute mm; + EXPECT_EQ("1970-01-01T00:00", absl::FormatCivilTime(mm)); + + absl::CivilHour hh; + EXPECT_EQ("1970-01-01T00", absl::FormatCivilTime(hh)); + + absl::CivilDay d; + EXPECT_EQ("1970-01-01", absl::FormatCivilTime(d)); + + absl::CivilMonth m; + EXPECT_EQ("1970-01", absl::FormatCivilTime(m)); + + absl::CivilYear y; + EXPECT_EQ("1970", absl::FormatCivilTime(y)); +} + +TEST(CivilTime, StructMember) { + struct S { + absl::CivilDay day; + }; + S s = {}; + EXPECT_EQ(absl::CivilDay{}, s.day); +} + +TEST(CivilTime, FieldsConstruction) { + EXPECT_EQ("2015-01-02T03:04:05", + absl::FormatCivilTime(absl::CivilSecond(2015, 1, 2, 3, 4, 5))); + EXPECT_EQ("2015-01-02T03:04:00", + absl::FormatCivilTime(absl::CivilSecond(2015, 1, 2, 3, 4))); + EXPECT_EQ("2015-01-02T03:00:00", + absl::FormatCivilTime(absl::CivilSecond(2015, 1, 2, 3))); + EXPECT_EQ("2015-01-02T00:00:00", + absl::FormatCivilTime(absl::CivilSecond(2015, 1, 2))); + EXPECT_EQ("2015-01-01T00:00:00", + absl::FormatCivilTime(absl::CivilSecond(2015, 1))); + EXPECT_EQ("2015-01-01T00:00:00", + absl::FormatCivilTime(absl::CivilSecond(2015))); + + EXPECT_EQ("2015-01-02T03:04", + absl::FormatCivilTime(absl::CivilMinute(2015, 1, 2, 3, 4, 5))); + EXPECT_EQ("2015-01-02T03:04", + absl::FormatCivilTime(absl::CivilMinute(2015, 1, 2, 3, 4))); + EXPECT_EQ("2015-01-02T03:00", + absl::FormatCivilTime(absl::CivilMinute(2015, 1, 2, 3))); + EXPECT_EQ("2015-01-02T00:00", + absl::FormatCivilTime(absl::CivilMinute(2015, 1, 2))); + EXPECT_EQ("2015-01-01T00:00", + absl::FormatCivilTime(absl::CivilMinute(2015, 1))); + EXPECT_EQ("2015-01-01T00:00", + absl::FormatCivilTime(absl::CivilMinute(2015))); + + EXPECT_EQ("2015-01-02T03", + absl::FormatCivilTime(absl::CivilHour(2015, 1, 2, 3, 4, 5))); + EXPECT_EQ("2015-01-02T03", + absl::FormatCivilTime(absl::CivilHour(2015, 1, 2, 3, 4))); + EXPECT_EQ("2015-01-02T03", + absl::FormatCivilTime(absl::CivilHour(2015, 1, 2, 3))); + EXPECT_EQ("2015-01-02T00", + absl::FormatCivilTime(absl::CivilHour(2015, 1, 2))); + EXPECT_EQ("2015-01-01T00", + absl::FormatCivilTime(absl::CivilHour(2015, 1))); + EXPECT_EQ("2015-01-01T00", + absl::FormatCivilTime(absl::CivilHour(2015))); + + EXPECT_EQ("2015-01-02", + absl::FormatCivilTime(absl::CivilDay(2015, 1, 2, 3, 4, 5))); + EXPECT_EQ("2015-01-02", + absl::FormatCivilTime(absl::CivilDay(2015, 1, 2, 3, 4))); + EXPECT_EQ("2015-01-02", + absl::FormatCivilTime(absl::CivilDay(2015, 1, 2, 3))); + EXPECT_EQ("2015-01-02", + absl::FormatCivilTime(absl::CivilDay(2015, 1, 2))); + EXPECT_EQ("2015-01-01", + absl::FormatCivilTime(absl::CivilDay(2015, 1))); + EXPECT_EQ("2015-01-01", + absl::FormatCivilTime(absl::CivilDay(2015))); + + EXPECT_EQ("2015-01", + absl::FormatCivilTime(absl::CivilMonth(2015, 1, 2, 3, 4, 5))); + EXPECT_EQ("2015-01", + absl::FormatCivilTime(absl::CivilMonth(2015, 1, 2, 3, 4))); + EXPECT_EQ("2015-01", + absl::FormatCivilTime(absl::CivilMonth(2015, 1, 2, 3))); + EXPECT_EQ("2015-01", + absl::FormatCivilTime(absl::CivilMonth(2015, 1, 2))); + EXPECT_EQ("2015-01", + absl::FormatCivilTime(absl::CivilMonth(2015, 1))); + EXPECT_EQ("2015-01", + absl::FormatCivilTime(absl::CivilMonth(2015))); + + EXPECT_EQ("2015", + absl::FormatCivilTime(absl::CivilYear(2015, 1, 2, 3, 4, 5))); + EXPECT_EQ("2015", + absl::FormatCivilTime(absl::CivilYear(2015, 1, 2, 3, 4))); + EXPECT_EQ("2015", + absl::FormatCivilTime(absl::CivilYear(2015, 1, 2, 3))); + EXPECT_EQ("2015", + absl::FormatCivilTime(absl::CivilYear(2015, 1, 2))); + EXPECT_EQ("2015", + absl::FormatCivilTime(absl::CivilYear(2015, 1))); + EXPECT_EQ("2015", + absl::FormatCivilTime(absl::CivilYear(2015))); +} + +TEST(CivilTime, FieldsConstructionLimits) { + const int kIntMax = std::numeric_limits<int>::max(); + EXPECT_EQ("2038-01-19T03:14:07", + absl::FormatCivilTime(absl::CivilSecond( + 1970, 1, 1, 0, 0, kIntMax))); + EXPECT_EQ("6121-02-11T05:21:07", + absl::FormatCivilTime(absl::CivilSecond( + 1970, 1, 1, 0, kIntMax, kIntMax))); + EXPECT_EQ("251104-11-20T12:21:07", + absl::FormatCivilTime(absl::CivilSecond( + 1970, 1, 1, kIntMax, kIntMax, kIntMax))); + EXPECT_EQ("6130715-05-30T12:21:07", + absl::FormatCivilTime(absl::CivilSecond( + 1970, 1, kIntMax, kIntMax, kIntMax, kIntMax))); + EXPECT_EQ("185087685-11-26T12:21:07", + absl::FormatCivilTime(absl::CivilSecond( + 1970, kIntMax, kIntMax, kIntMax, kIntMax, kIntMax))); + + const int kIntMin = std::numeric_limits<int>::min(); + EXPECT_EQ("1901-12-13T20:45:52", + absl::FormatCivilTime(absl::CivilSecond( + 1970, 1, 1, 0, 0, kIntMin))); + EXPECT_EQ("-2182-11-20T18:37:52", + absl::FormatCivilTime(absl::CivilSecond( + 1970, 1, 1, 0, kIntMin, kIntMin))); + EXPECT_EQ("-247165-02-11T10:37:52", + absl::FormatCivilTime(absl::CivilSecond( + 1970, 1, 1, kIntMin, kIntMin, kIntMin))); + EXPECT_EQ("-6126776-08-01T10:37:52", + absl::FormatCivilTime(absl::CivilSecond( + 1970, 1, kIntMin, kIntMin, kIntMin, kIntMin))); + EXPECT_EQ("-185083747-10-31T10:37:52", + absl::FormatCivilTime(absl::CivilSecond( + 1970, kIntMin, kIntMin, kIntMin, kIntMin, kIntMin))); +} + +TEST(CivilTime, RangeLimits) { + const absl::civil_year_t kYearMax = + std::numeric_limits<absl::civil_year_t>::max(); + EXPECT_EQ(absl::CivilYear(kYearMax), + absl::CivilYear::max()); + EXPECT_EQ(absl::CivilMonth(kYearMax, 12), + absl::CivilMonth::max()); + EXPECT_EQ(absl::CivilDay(kYearMax, 12, 31), + absl::CivilDay::max()); + EXPECT_EQ(absl::CivilHour(kYearMax, 12, 31, 23), + absl::CivilHour::max()); + EXPECT_EQ(absl::CivilMinute(kYearMax, 12, 31, 23, 59), + absl::CivilMinute::max()); + EXPECT_EQ(absl::CivilSecond(kYearMax, 12, 31, 23, 59, 59), + absl::CivilSecond::max()); + + const absl::civil_year_t kYearMin = + std::numeric_limits<absl::civil_year_t>::min(); + EXPECT_EQ(absl::CivilYear(kYearMin), + absl::CivilYear::min()); + EXPECT_EQ(absl::CivilMonth(kYearMin, 1), + absl::CivilMonth::min()); + EXPECT_EQ(absl::CivilDay(kYearMin, 1, 1), + absl::CivilDay::min()); + EXPECT_EQ(absl::CivilHour(kYearMin, 1, 1, 0), + absl::CivilHour::min()); + EXPECT_EQ(absl::CivilMinute(kYearMin, 1, 1, 0, 0), + absl::CivilMinute::min()); + EXPECT_EQ(absl::CivilSecond(kYearMin, 1, 1, 0, 0, 0), + absl::CivilSecond::min()); +} + +TEST(CivilTime, ImplicitCrossAlignment) { + absl::CivilYear year(2015); + absl::CivilMonth month = year; + absl::CivilDay day = month; + absl::CivilHour hour = day; + absl::CivilMinute minute = hour; + absl::CivilSecond second = minute; + + second = year; + EXPECT_EQ(second, year); + second = month; + EXPECT_EQ(second, month); + second = day; + EXPECT_EQ(second, day); + second = hour; + EXPECT_EQ(second, hour); + second = minute; + EXPECT_EQ(second, minute); + + minute = year; + EXPECT_EQ(minute, year); + minute = month; + EXPECT_EQ(minute, month); + minute = day; + EXPECT_EQ(minute, day); + minute = hour; + EXPECT_EQ(minute, hour); + + hour = year; + EXPECT_EQ(hour, year); + hour = month; + EXPECT_EQ(hour, month); + hour = day; + EXPECT_EQ(hour, day); + + day = year; + EXPECT_EQ(day, year); + day = month; + EXPECT_EQ(day, month); + + month = year; + EXPECT_EQ(month, year); + + // Ensures unsafe conversions are not allowed. + EXPECT_FALSE( + (std::is_convertible<absl::CivilSecond, absl::CivilMinute>::value)); + EXPECT_FALSE( + (std::is_convertible<absl::CivilSecond, absl::CivilHour>::value)); + EXPECT_FALSE( + (std::is_convertible<absl::CivilSecond, absl::CivilDay>::value)); + EXPECT_FALSE( + (std::is_convertible<absl::CivilSecond, absl::CivilMonth>::value)); + EXPECT_FALSE( + (std::is_convertible<absl::CivilSecond, absl::CivilYear>::value)); + + EXPECT_FALSE( + (std::is_convertible<absl::CivilMinute, absl::CivilHour>::value)); + EXPECT_FALSE( + (std::is_convertible<absl::CivilMinute, absl::CivilDay>::value)); + EXPECT_FALSE( + (std::is_convertible<absl::CivilMinute, absl::CivilMonth>::value)); + EXPECT_FALSE( + (std::is_convertible<absl::CivilMinute, absl::CivilYear>::value)); + + EXPECT_FALSE( + (std::is_convertible<absl::CivilHour, absl::CivilDay>::value)); + EXPECT_FALSE( + (std::is_convertible<absl::CivilHour, absl::CivilMonth>::value)); + EXPECT_FALSE( + (std::is_convertible<absl::CivilHour, absl::CivilYear>::value)); + + EXPECT_FALSE( + (std::is_convertible<absl::CivilDay, absl::CivilMonth>::value)); + EXPECT_FALSE( + (std::is_convertible<absl::CivilDay, absl::CivilYear>::value)); + + EXPECT_FALSE( + (std::is_convertible<absl::CivilMonth, absl::CivilYear>::value)); +} + +TEST(CivilTime, ExplicitCrossAlignment) { + // + // Assign from smaller units -> larger units + // + + absl::CivilSecond second(2015, 1, 2, 3, 4, 5); + EXPECT_EQ("2015-01-02T03:04:05", absl::FormatCivilTime(second)); + + absl::CivilMinute minute(second); + EXPECT_EQ("2015-01-02T03:04", absl::FormatCivilTime(minute)); + + absl::CivilHour hour(minute); + EXPECT_EQ("2015-01-02T03", absl::FormatCivilTime(hour)); + + absl::CivilDay day(hour); + EXPECT_EQ("2015-01-02", absl::FormatCivilTime(day)); + + absl::CivilMonth month(day); + EXPECT_EQ("2015-01", absl::FormatCivilTime(month)); + + absl::CivilYear year(month); + EXPECT_EQ("2015", absl::FormatCivilTime(year)); + + // + // Now assign from larger units -> smaller units + // + + month = absl::CivilMonth(year); + EXPECT_EQ("2015-01", absl::FormatCivilTime(month)); + + day = absl::CivilDay(month); + EXPECT_EQ("2015-01-01", absl::FormatCivilTime(day)); + + hour = absl::CivilHour(day); + EXPECT_EQ("2015-01-01T00", absl::FormatCivilTime(hour)); + + minute = absl::CivilMinute(hour); + EXPECT_EQ("2015-01-01T00:00", absl::FormatCivilTime(minute)); + + second = absl::CivilSecond(minute); + EXPECT_EQ("2015-01-01T00:00:00", absl::FormatCivilTime(second)); +} + +// Metafunction to test whether difference is allowed between two types. +template <typename T1, typename T2> +struct HasDiff { + template <typename U1, typename U2> + static std::false_type test(...); + template <typename U1, typename U2> + static std::true_type test(decltype(std::declval<U1>() - std::declval<U2>())); + static constexpr bool value = decltype(test<T1, T2>(0))::value; +}; + +TEST(CivilTime, DisallowCrossAlignedDifference) { + // Difference is allowed between types with the same alignment. + static_assert(HasDiff<absl::CivilSecond, absl::CivilSecond>::value, ""); + static_assert(HasDiff<absl::CivilMinute, absl::CivilMinute>::value, ""); + static_assert(HasDiff<absl::CivilHour, absl::CivilHour>::value, ""); + static_assert(HasDiff<absl::CivilDay, absl::CivilDay>::value, ""); + static_assert(HasDiff<absl::CivilMonth, absl::CivilMonth>::value, ""); + static_assert(HasDiff<absl::CivilYear, absl::CivilYear>::value, ""); + + // Difference is disallowed between types with different alignments. + static_assert(!HasDiff<absl::CivilSecond, absl::CivilMinute>::value, ""); + static_assert(!HasDiff<absl::CivilSecond, absl::CivilHour>::value, ""); + static_assert(!HasDiff<absl::CivilSecond, absl::CivilDay>::value, ""); + static_assert(!HasDiff<absl::CivilSecond, absl::CivilMonth>::value, ""); + static_assert(!HasDiff<absl::CivilSecond, absl::CivilYear>::value, ""); + + static_assert(!HasDiff<absl::CivilMinute, absl::CivilHour>::value, ""); + static_assert(!HasDiff<absl::CivilMinute, absl::CivilDay>::value, ""); + static_assert(!HasDiff<absl::CivilMinute, absl::CivilMonth>::value, ""); + static_assert(!HasDiff<absl::CivilMinute, absl::CivilYear>::value, ""); + + static_assert(!HasDiff<absl::CivilHour, absl::CivilDay>::value, ""); + static_assert(!HasDiff<absl::CivilHour, absl::CivilMonth>::value, ""); + static_assert(!HasDiff<absl::CivilHour, absl::CivilYear>::value, ""); + + static_assert(!HasDiff<absl::CivilDay, absl::CivilMonth>::value, ""); + static_assert(!HasDiff<absl::CivilDay, absl::CivilYear>::value, ""); + + static_assert(!HasDiff<absl::CivilMonth, absl::CivilYear>::value, ""); +} + +TEST(CivilTime, ValueSemantics) { + const absl::CivilHour a(2015, 1, 2, 3); + const absl::CivilHour b = a; + const absl::CivilHour c(b); + absl::CivilHour d; + d = c; + EXPECT_EQ("2015-01-02T03", absl::FormatCivilTime(d)); +} + +TEST(CivilTime, Relational) { + // Tests that the alignment unit is ignored in comparison. + const absl::CivilYear year(2014); + const absl::CivilMonth month(year); + EXPECT_EQ(year, month); + +#define TEST_RELATIONAL(OLDER, YOUNGER) \ + do { \ + EXPECT_FALSE(OLDER < OLDER); \ + EXPECT_FALSE(OLDER > OLDER); \ + EXPECT_TRUE(OLDER >= OLDER); \ + EXPECT_TRUE(OLDER <= OLDER); \ + EXPECT_FALSE(YOUNGER < YOUNGER); \ + EXPECT_FALSE(YOUNGER > YOUNGER); \ + EXPECT_TRUE(YOUNGER >= YOUNGER); \ + EXPECT_TRUE(YOUNGER <= YOUNGER); \ + EXPECT_EQ(OLDER, OLDER); \ + EXPECT_NE(OLDER, YOUNGER); \ + EXPECT_LT(OLDER, YOUNGER); \ + EXPECT_LE(OLDER, YOUNGER); \ + EXPECT_GT(YOUNGER, OLDER); \ + EXPECT_GE(YOUNGER, OLDER); \ + } while (0) + + // Alignment is ignored in comparison (verified above), so CivilSecond is + // used to test comparison in all field positions. + TEST_RELATIONAL(absl::CivilSecond(2014, 1, 1, 0, 0, 0), + absl::CivilSecond(2015, 1, 1, 0, 0, 0)); + TEST_RELATIONAL(absl::CivilSecond(2014, 1, 1, 0, 0, 0), + absl::CivilSecond(2014, 2, 1, 0, 0, 0)); + TEST_RELATIONAL(absl::CivilSecond(2014, 1, 1, 0, 0, 0), + absl::CivilSecond(2014, 1, 2, 0, 0, 0)); + TEST_RELATIONAL(absl::CivilSecond(2014, 1, 1, 0, 0, 0), + absl::CivilSecond(2014, 1, 1, 1, 0, 0)); + TEST_RELATIONAL(absl::CivilSecond(2014, 1, 1, 1, 0, 0), + absl::CivilSecond(2014, 1, 1, 1, 1, 0)); + TEST_RELATIONAL(absl::CivilSecond(2014, 1, 1, 1, 1, 0), + absl::CivilSecond(2014, 1, 1, 1, 1, 1)); + + // Tests the relational operators of two different civil-time types. + TEST_RELATIONAL(absl::CivilDay(2014, 1, 1), + absl::CivilMinute(2014, 1, 1, 1, 1)); + TEST_RELATIONAL(absl::CivilDay(2014, 1, 1), + absl::CivilMonth(2014, 2)); + +#undef TEST_RELATIONAL +} + +TEST(CivilTime, Arithmetic) { + absl::CivilSecond second(2015, 1, 2, 3, 4, 5); + EXPECT_EQ("2015-01-02T03:04:06", absl::FormatCivilTime(second += 1)); + EXPECT_EQ("2015-01-02T03:04:07", absl::FormatCivilTime(second + 1)); + EXPECT_EQ("2015-01-02T03:04:08", absl::FormatCivilTime(2 + second)); + EXPECT_EQ("2015-01-02T03:04:05", absl::FormatCivilTime(second - 1)); + EXPECT_EQ("2015-01-02T03:04:05", absl::FormatCivilTime(second -= 1)); + EXPECT_EQ("2015-01-02T03:04:05", absl::FormatCivilTime(second++)); + EXPECT_EQ("2015-01-02T03:04:07", absl::FormatCivilTime(++second)); + EXPECT_EQ("2015-01-02T03:04:07", absl::FormatCivilTime(second--)); + EXPECT_EQ("2015-01-02T03:04:05", absl::FormatCivilTime(--second)); + + absl::CivilMinute minute(2015, 1, 2, 3, 4); + EXPECT_EQ("2015-01-02T03:05", absl::FormatCivilTime(minute += 1)); + EXPECT_EQ("2015-01-02T03:06", absl::FormatCivilTime(minute + 1)); + EXPECT_EQ("2015-01-02T03:07", absl::FormatCivilTime(2 + minute)); + EXPECT_EQ("2015-01-02T03:04", absl::FormatCivilTime(minute - 1)); + EXPECT_EQ("2015-01-02T03:04", absl::FormatCivilTime(minute -= 1)); + EXPECT_EQ("2015-01-02T03:04", absl::FormatCivilTime(minute++)); + EXPECT_EQ("2015-01-02T03:06", absl::FormatCivilTime(++minute)); + EXPECT_EQ("2015-01-02T03:06", absl::FormatCivilTime(minute--)); + EXPECT_EQ("2015-01-02T03:04", absl::FormatCivilTime(--minute)); + + absl::CivilHour hour(2015, 1, 2, 3); + EXPECT_EQ("2015-01-02T04", absl::FormatCivilTime(hour += 1)); + EXPECT_EQ("2015-01-02T05", absl::FormatCivilTime(hour + 1)); + EXPECT_EQ("2015-01-02T06", absl::FormatCivilTime(2 + hour)); + EXPECT_EQ("2015-01-02T03", absl::FormatCivilTime(hour - 1)); + EXPECT_EQ("2015-01-02T03", absl::FormatCivilTime(hour -= 1)); + EXPECT_EQ("2015-01-02T03", absl::FormatCivilTime(hour++)); + EXPECT_EQ("2015-01-02T05", absl::FormatCivilTime(++hour)); + EXPECT_EQ("2015-01-02T05", absl::FormatCivilTime(hour--)); + EXPECT_EQ("2015-01-02T03", absl::FormatCivilTime(--hour)); + + absl::CivilDay day(2015, 1, 2); + EXPECT_EQ("2015-01-03", absl::FormatCivilTime(day += 1)); + EXPECT_EQ("2015-01-04", absl::FormatCivilTime(day + 1)); + EXPECT_EQ("2015-01-05", absl::FormatCivilTime(2 + day)); + EXPECT_EQ("2015-01-02", absl::FormatCivilTime(day - 1)); + EXPECT_EQ("2015-01-02", absl::FormatCivilTime(day -= 1)); + EXPECT_EQ("2015-01-02", absl::FormatCivilTime(day++)); + EXPECT_EQ("2015-01-04", absl::FormatCivilTime(++day)); + EXPECT_EQ("2015-01-04", absl::FormatCivilTime(day--)); + EXPECT_EQ("2015-01-02", absl::FormatCivilTime(--day)); + + absl::CivilMonth month(2015, 1); + EXPECT_EQ("2015-02", absl::FormatCivilTime(month += 1)); + EXPECT_EQ("2015-03", absl::FormatCivilTime(month + 1)); + EXPECT_EQ("2015-04", absl::FormatCivilTime(2 + month)); + EXPECT_EQ("2015-01", absl::FormatCivilTime(month - 1)); + EXPECT_EQ("2015-01", absl::FormatCivilTime(month -= 1)); + EXPECT_EQ("2015-01", absl::FormatCivilTime(month++)); + EXPECT_EQ("2015-03", absl::FormatCivilTime(++month)); + EXPECT_EQ("2015-03", absl::FormatCivilTime(month--)); + EXPECT_EQ("2015-01", absl::FormatCivilTime(--month)); + + absl::CivilYear year(2015); + EXPECT_EQ("2016", absl::FormatCivilTime(year += 1)); + EXPECT_EQ("2017", absl::FormatCivilTime(year + 1)); + EXPECT_EQ("2018", absl::FormatCivilTime(2 + year)); + EXPECT_EQ("2015", absl::FormatCivilTime(year - 1)); + EXPECT_EQ("2015", absl::FormatCivilTime(year -= 1)); + EXPECT_EQ("2015", absl::FormatCivilTime(year++)); + EXPECT_EQ("2017", absl::FormatCivilTime(++year)); + EXPECT_EQ("2017", absl::FormatCivilTime(year--)); + EXPECT_EQ("2015", absl::FormatCivilTime(--year)); +} + +TEST(CivilTime, ArithmeticLimits) { + const int kIntMax = std::numeric_limits<int>::max(); + const int kIntMin = std::numeric_limits<int>::min(); + + absl::CivilSecond second(1970, 1, 1, 0, 0, 0); + second += kIntMax; + EXPECT_EQ("2038-01-19T03:14:07", absl::FormatCivilTime(second)); + second -= kIntMax; + EXPECT_EQ("1970-01-01T00:00:00", absl::FormatCivilTime(second)); + second += kIntMin; + EXPECT_EQ("1901-12-13T20:45:52", absl::FormatCivilTime(second)); + second -= kIntMin; + EXPECT_EQ("1970-01-01T00:00:00", absl::FormatCivilTime(second)); + + absl::CivilMinute minute(1970, 1, 1, 0, 0); + minute += kIntMax; + EXPECT_EQ("6053-01-23T02:07", absl::FormatCivilTime(minute)); + minute -= kIntMax; + EXPECT_EQ("1970-01-01T00:00", absl::FormatCivilTime(minute)); + minute += kIntMin; + EXPECT_EQ("-2114-12-08T21:52", absl::FormatCivilTime(minute)); + minute -= kIntMin; + EXPECT_EQ("1970-01-01T00:00", absl::FormatCivilTime(minute)); + + absl::CivilHour hour(1970, 1, 1, 0); + hour += kIntMax; + EXPECT_EQ("246953-10-09T07", absl::FormatCivilTime(hour)); + hour -= kIntMax; + EXPECT_EQ("1970-01-01T00", absl::FormatCivilTime(hour)); + hour += kIntMin; + EXPECT_EQ("-243014-03-24T16", absl::FormatCivilTime(hour)); + hour -= kIntMin; + EXPECT_EQ("1970-01-01T00", absl::FormatCivilTime(hour)); + + absl::CivilDay day(1970, 1, 1); + day += kIntMax; + EXPECT_EQ("5881580-07-11", absl::FormatCivilTime(day)); + day -= kIntMax; + EXPECT_EQ("1970-01-01", absl::FormatCivilTime(day)); + day += kIntMin; + EXPECT_EQ("-5877641-06-23", absl::FormatCivilTime(day)); + day -= kIntMin; + EXPECT_EQ("1970-01-01", absl::FormatCivilTime(day)); + + absl::CivilMonth month(1970, 1); + month += kIntMax; + EXPECT_EQ("178958940-08", absl::FormatCivilTime(month)); + month -= kIntMax; + EXPECT_EQ("1970-01", absl::FormatCivilTime(month)); + month += kIntMin; + EXPECT_EQ("-178955001-05", absl::FormatCivilTime(month)); + month -= kIntMin; + EXPECT_EQ("1970-01", absl::FormatCivilTime(month)); + + absl::CivilYear year(0); + year += kIntMax; + EXPECT_EQ("2147483647", absl::FormatCivilTime(year)); + year -= kIntMax; + EXPECT_EQ("0", absl::FormatCivilTime(year)); + year += kIntMin; + EXPECT_EQ("-2147483648", absl::FormatCivilTime(year)); + year -= kIntMin; + EXPECT_EQ("0", absl::FormatCivilTime(year)); +} + +TEST(CivilTime, Difference) { + absl::CivilSecond second(2015, 1, 2, 3, 4, 5); + EXPECT_EQ(0, second - second); + EXPECT_EQ(10, (second + 10) - second); + EXPECT_EQ(-10, (second - 10) - second); + + absl::CivilMinute minute(2015, 1, 2, 3, 4); + EXPECT_EQ(0, minute - minute); + EXPECT_EQ(10, (minute + 10) - minute); + EXPECT_EQ(-10, (minute - 10) - minute); + + absl::CivilHour hour(2015, 1, 2, 3); + EXPECT_EQ(0, hour - hour); + EXPECT_EQ(10, (hour + 10) - hour); + EXPECT_EQ(-10, (hour - 10) - hour); + + absl::CivilDay day(2015, 1, 2); + EXPECT_EQ(0, day - day); + EXPECT_EQ(10, (day + 10) - day); + EXPECT_EQ(-10, (day - 10) - day); + + absl::CivilMonth month(2015, 1); + EXPECT_EQ(0, month - month); + EXPECT_EQ(10, (month + 10) - month); + EXPECT_EQ(-10, (month - 10) - month); + + absl::CivilYear year(2015); + EXPECT_EQ(0, year - year); + EXPECT_EQ(10, (year + 10) - year); + EXPECT_EQ(-10, (year - 10) - year); +} + +TEST(CivilTime, DifferenceLimits) { + const absl::civil_diff_t kDiffMax = + std::numeric_limits<absl::civil_diff_t>::max(); + const absl::civil_diff_t kDiffMin = + std::numeric_limits<absl::civil_diff_t>::min(); + + // Check day arithmetic at the end of the year range. + const absl::CivilDay max_day(kDiffMax, 12, 31); + EXPECT_EQ(1, max_day - (max_day - 1)); + EXPECT_EQ(-1, (max_day - 1) - max_day); + + // Check day arithmetic at the start of the year range. + const absl::CivilDay min_day(kDiffMin, 1, 1); + EXPECT_EQ(1, (min_day + 1) - min_day); + EXPECT_EQ(-1, min_day - (min_day + 1)); + + // Check the limits of the return value. + const absl::CivilDay d1(1970, 1, 1); + const absl::CivilDay d2(25252734927768524, 7, 27); + EXPECT_EQ(kDiffMax, d2 - d1); + EXPECT_EQ(kDiffMin, d1 - (d2 + 1)); +} + +TEST(CivilTime, Properties) { + absl::CivilSecond ss(2015, 2, 3, 4, 5, 6); + EXPECT_EQ(2015, ss.year()); + EXPECT_EQ(2, ss.month()); + EXPECT_EQ(3, ss.day()); + EXPECT_EQ(4, ss.hour()); + EXPECT_EQ(5, ss.minute()); + EXPECT_EQ(6, ss.second()); + + absl::CivilMinute mm(2015, 2, 3, 4, 5, 6); + EXPECT_EQ(2015, mm.year()); + EXPECT_EQ(2, mm.month()); + EXPECT_EQ(3, mm.day()); + EXPECT_EQ(4, mm.hour()); + EXPECT_EQ(5, mm.minute()); + EXPECT_EQ(0, mm.second()); + + absl::CivilHour hh(2015, 2, 3, 4, 5, 6); + EXPECT_EQ(2015, hh.year()); + EXPECT_EQ(2, hh.month()); + EXPECT_EQ(3, hh.day()); + EXPECT_EQ(4, hh.hour()); + EXPECT_EQ(0, hh.minute()); + EXPECT_EQ(0, hh.second()); + + absl::CivilDay d(2015, 2, 3, 4, 5, 6); + EXPECT_EQ(2015, d.year()); + EXPECT_EQ(2, d.month()); + EXPECT_EQ(3, d.day()); + EXPECT_EQ(0, d.hour()); + EXPECT_EQ(0, d.minute()); + EXPECT_EQ(0, d.second()); + + absl::CivilMonth m(2015, 2, 3, 4, 5, 6); + EXPECT_EQ(2015, m.year()); + EXPECT_EQ(2, m.month()); + EXPECT_EQ(1, m.day()); + EXPECT_EQ(0, m.hour()); + EXPECT_EQ(0, m.minute()); + EXPECT_EQ(0, m.second()); + + absl::CivilYear y(2015, 2, 3, 4, 5, 6); + EXPECT_EQ(2015, y.year()); + EXPECT_EQ(1, y.month()); + EXPECT_EQ(1, y.day()); + EXPECT_EQ(0, y.hour()); + EXPECT_EQ(0, y.minute()); + EXPECT_EQ(0, y.second()); +} + +TEST(CivilTime, Format) { + absl::CivilSecond ss; + EXPECT_EQ("1970-01-01T00:00:00", absl::FormatCivilTime(ss)); + + absl::CivilMinute mm; + EXPECT_EQ("1970-01-01T00:00", absl::FormatCivilTime(mm)); + + absl::CivilHour hh; + EXPECT_EQ("1970-01-01T00", absl::FormatCivilTime(hh)); + + absl::CivilDay d; + EXPECT_EQ("1970-01-01", absl::FormatCivilTime(d)); + + absl::CivilMonth m; + EXPECT_EQ("1970-01", absl::FormatCivilTime(m)); + + absl::CivilYear y; + EXPECT_EQ("1970", absl::FormatCivilTime(y)); +} + +TEST(CivilTime, FormatAndParseLenient) { + absl::CivilSecond ss; + EXPECT_EQ("1970-01-01T00:00:00", absl::FormatCivilTime(ss)); + + absl::CivilMinute mm; + EXPECT_EQ("1970-01-01T00:00", absl::FormatCivilTime(mm)); + + absl::CivilHour hh; + EXPECT_EQ("1970-01-01T00", absl::FormatCivilTime(hh)); + + absl::CivilDay d; + EXPECT_EQ("1970-01-01", absl::FormatCivilTime(d)); + + absl::CivilMonth m; + EXPECT_EQ("1970-01", absl::FormatCivilTime(m)); + + absl::CivilYear y; + EXPECT_EQ("1970", absl::FormatCivilTime(y)); +} + +TEST(CivilTime, OutputStream) { + absl::CivilSecond cs(2016, 2, 3, 4, 5, 6); + { + std::stringstream ss; + ss << std::left << std::setfill('.'); + ss << std::setw(3) << 'X'; + ss << std::setw(21) << absl::CivilYear(cs); + ss << std::setw(3) << 'X'; + EXPECT_EQ("X..2016.................X..", ss.str()); + } + { + std::stringstream ss; + ss << std::left << std::setfill('.'); + ss << std::setw(3) << 'X'; + ss << std::setw(21) << absl::CivilMonth(cs); + ss << std::setw(3) << 'X'; + EXPECT_EQ("X..2016-02..............X..", ss.str()); + } + { + std::stringstream ss; + ss << std::left << std::setfill('.'); + ss << std::setw(3) << 'X'; + ss << std::setw(21) << absl::CivilDay(cs); + ss << std::setw(3) << 'X'; + EXPECT_EQ("X..2016-02-03...........X..", ss.str()); + } + { + std::stringstream ss; + ss << std::left << std::setfill('.'); + ss << std::setw(3) << 'X'; + ss << std::setw(21) << absl::CivilHour(cs); + ss << std::setw(3) << 'X'; + EXPECT_EQ("X..2016-02-03T04........X..", ss.str()); + } + { + std::stringstream ss; + ss << std::left << std::setfill('.'); + ss << std::setw(3) << 'X'; + ss << std::setw(21) << absl::CivilMinute(cs); + ss << std::setw(3) << 'X'; + EXPECT_EQ("X..2016-02-03T04:05.....X..", ss.str()); + } + { + std::stringstream ss; + ss << std::left << std::setfill('.'); + ss << std::setw(3) << 'X'; + ss << std::setw(21) << absl::CivilSecond(cs); + ss << std::setw(3) << 'X'; + EXPECT_EQ("X..2016-02-03T04:05:06..X..", ss.str()); + } + { + std::stringstream ss; + ss << std::left << std::setfill('.'); + ss << std::setw(3) << 'X'; + ss << std::setw(21) << absl::Weekday::wednesday; + ss << std::setw(3) << 'X'; + EXPECT_EQ("X..Wednesday............X..", ss.str()); + } +} + +TEST(CivilTime, Weekday) { + absl::CivilDay d(1970, 1, 1); + EXPECT_EQ(absl::Weekday::thursday, absl::GetWeekday(d)) << d; + + // We used to get this wrong for years < -30. + d = absl::CivilDay(-31, 12, 24); + EXPECT_EQ(absl::Weekday::wednesday, absl::GetWeekday(d)) << d; +} + +TEST(CivilTime, NextPrevWeekday) { + // Jan 1, 1970 was a Thursday. + const absl::CivilDay thursday(1970, 1, 1); + + // Thursday -> Thursday + absl::CivilDay d = absl::NextWeekday(thursday, absl::Weekday::thursday); + EXPECT_EQ(7, d - thursday) << d; + EXPECT_EQ(d - 14, absl::PrevWeekday(thursday, absl::Weekday::thursday)); + + // Thursday -> Friday + d = absl::NextWeekday(thursday, absl::Weekday::friday); + EXPECT_EQ(1, d - thursday) << d; + EXPECT_EQ(d - 7, absl::PrevWeekday(thursday, absl::Weekday::friday)); + + // Thursday -> Saturday + d = absl::NextWeekday(thursday, absl::Weekday::saturday); + EXPECT_EQ(2, d - thursday) << d; + EXPECT_EQ(d - 7, absl::PrevWeekday(thursday, absl::Weekday::saturday)); + + // Thursday -> Sunday + d = absl::NextWeekday(thursday, absl::Weekday::sunday); + EXPECT_EQ(3, d - thursday) << d; + EXPECT_EQ(d - 7, absl::PrevWeekday(thursday, absl::Weekday::sunday)); + + // Thursday -> Monday + d = absl::NextWeekday(thursday, absl::Weekday::monday); + EXPECT_EQ(4, d - thursday) << d; + EXPECT_EQ(d - 7, absl::PrevWeekday(thursday, absl::Weekday::monday)); + + // Thursday -> Tuesday + d = absl::NextWeekday(thursday, absl::Weekday::tuesday); + EXPECT_EQ(5, d - thursday) << d; + EXPECT_EQ(d - 7, absl::PrevWeekday(thursday, absl::Weekday::tuesday)); + + // Thursday -> Wednesday + d = absl::NextWeekday(thursday, absl::Weekday::wednesday); + EXPECT_EQ(6, d - thursday) << d; + EXPECT_EQ(d - 7, absl::PrevWeekday(thursday, absl::Weekday::wednesday)); +} + +// NOTE: Run this with --copt=-ftrapv to detect overflow problems. +TEST(CivilTime, DifferenceWithHugeYear) { + absl::CivilDay d1(9223372036854775807, 1, 1); + absl::CivilDay d2(9223372036854775807, 12, 31); + EXPECT_EQ(364, d2 - d1); + + d1 = absl::CivilDay(-9223372036854775807 - 1, 1, 1); + d2 = absl::CivilDay(-9223372036854775807 - 1, 12, 31); + EXPECT_EQ(365, d2 - d1); + + // Check the limits of the return value at the end of the year range. + d1 = absl::CivilDay(9223372036854775807, 1, 1); + d2 = absl::CivilDay(9198119301927009252, 6, 6); + EXPECT_EQ(9223372036854775807, d1 - d2); + d2 = d2 - 1; + EXPECT_EQ(-9223372036854775807 - 1, d2 - d1); + + // Check the limits of the return value at the start of the year range. + d1 = absl::CivilDay(-9223372036854775807 - 1, 1, 1); + d2 = absl::CivilDay(-9198119301927009254, 7, 28); + EXPECT_EQ(9223372036854775807, d2 - d1); + d2 = d2 + 1; + EXPECT_EQ(-9223372036854775807 - 1, d1 - d2); + + // Check the limits of the return value from either side of year 0. + d1 = absl::CivilDay(-12626367463883278, 9, 3); + d2 = absl::CivilDay(12626367463883277, 3, 28); + EXPECT_EQ(9223372036854775807, d2 - d1); + d2 = d2 + 1; + EXPECT_EQ(-9223372036854775807 - 1, d1 - d2); +} + +// NOTE: Run this with --copt=-ftrapv to detect overflow problems. +TEST(CivilTime, DifferenceNoIntermediateOverflow) { + // The difference up to the minute field would be below the minimum + // int64_t, but the 52 extra seconds brings us back to the minimum. + absl::CivilSecond s1(-292277022657, 1, 27, 8, 29 - 1, 52); + absl::CivilSecond s2(1970, 1, 1, 0, 0 - 1, 0); + EXPECT_EQ(-9223372036854775807 - 1, s1 - s2); + + // The difference up to the minute field would be above the maximum + // int64_t, but the -53 extra seconds brings us back to the maximum. + s1 = absl::CivilSecond(292277026596, 12, 4, 15, 30, 7 - 7); + s2 = absl::CivilSecond(1970, 1, 1, 0, 0, 0 - 7); + EXPECT_EQ(9223372036854775807, s1 - s2); +} + +TEST(CivilTime, NormalizeSimpleOverflow) { + absl::CivilSecond cs; + cs = absl::CivilSecond(2013, 11, 15, 16, 32, 59 + 1); + EXPECT_EQ("2013-11-15T16:33:00", absl::FormatCivilTime(cs)); + cs = absl::CivilSecond(2013, 11, 15, 16, 59 + 1, 14); + EXPECT_EQ("2013-11-15T17:00:14", absl::FormatCivilTime(cs)); + cs = absl::CivilSecond(2013, 11, 15, 23 + 1, 32, 14); + EXPECT_EQ("2013-11-16T00:32:14", absl::FormatCivilTime(cs)); + cs = absl::CivilSecond(2013, 11, 30 + 1, 16, 32, 14); + EXPECT_EQ("2013-12-01T16:32:14", absl::FormatCivilTime(cs)); + cs = absl::CivilSecond(2013, 12 + 1, 15, 16, 32, 14); + EXPECT_EQ("2014-01-15T16:32:14", absl::FormatCivilTime(cs)); +} + +TEST(CivilTime, NormalizeSimpleUnderflow) { + absl::CivilSecond cs; + cs = absl::CivilSecond(2013, 11, 15, 16, 32, 0 - 1); + EXPECT_EQ("2013-11-15T16:31:59", absl::FormatCivilTime(cs)); + cs = absl::CivilSecond(2013, 11, 15, 16, 0 - 1, 14); + EXPECT_EQ("2013-11-15T15:59:14", absl::FormatCivilTime(cs)); + cs = absl::CivilSecond(2013, 11, 15, 0 - 1, 32, 14); + EXPECT_EQ("2013-11-14T23:32:14", absl::FormatCivilTime(cs)); + cs = absl::CivilSecond(2013, 11, 1 - 1, 16, 32, 14); + EXPECT_EQ("2013-10-31T16:32:14", absl::FormatCivilTime(cs)); + cs = absl::CivilSecond(2013, 1 - 1, 15, 16, 32, 14); + EXPECT_EQ("2012-12-15T16:32:14", absl::FormatCivilTime(cs)); +} + +TEST(CivilTime, NormalizeMultipleOverflow) { + absl::CivilSecond cs(2013, 12, 31, 23, 59, 59 + 1); + EXPECT_EQ("2014-01-01T00:00:00", absl::FormatCivilTime(cs)); +} + +TEST(CivilTime, NormalizeMultipleUnderflow) { + absl::CivilSecond cs(2014, 1, 1, 0, 0, 0 - 1); + EXPECT_EQ("2013-12-31T23:59:59", absl::FormatCivilTime(cs)); +} + +TEST(CivilTime, NormalizeOverflowLimits) { + absl::CivilSecond cs; + + const int kintmax = std::numeric_limits<int>::max(); + cs = absl::CivilSecond(0, kintmax, kintmax, kintmax, kintmax, kintmax); + EXPECT_EQ("185085715-11-27T12:21:07", absl::FormatCivilTime(cs)); + + const int kintmin = std::numeric_limits<int>::min(); + cs = absl::CivilSecond(0, kintmin, kintmin, kintmin, kintmin, kintmin); + EXPECT_EQ("-185085717-10-31T10:37:52", absl::FormatCivilTime(cs)); +} + +TEST(CivilTime, NormalizeComplexOverflow) { + absl::CivilSecond cs; + cs = absl::CivilSecond(2013, 11, 15, 16, 32, 14 + 123456789); + EXPECT_EQ("2017-10-14T14:05:23", absl::FormatCivilTime(cs)); + cs = absl::CivilSecond(2013, 11, 15, 16, 32 + 1234567, 14); + EXPECT_EQ("2016-03-22T00:39:14", absl::FormatCivilTime(cs)); + cs = absl::CivilSecond(2013, 11, 15, 16 + 123456, 32, 14); + EXPECT_EQ("2027-12-16T16:32:14", absl::FormatCivilTime(cs)); + cs = absl::CivilSecond(2013, 11, 15 + 1234, 16, 32, 14); + EXPECT_EQ("2017-04-02T16:32:14", absl::FormatCivilTime(cs)); + cs = absl::CivilSecond(2013, 11 + 123, 15, 16, 32, 14); + EXPECT_EQ("2024-02-15T16:32:14", absl::FormatCivilTime(cs)); +} + +TEST(CivilTime, NormalizeComplexUnderflow) { + absl::CivilSecond cs; + cs = absl::CivilSecond(1999, 3, 0, 0, 0, 0); // year 400 + EXPECT_EQ("1999-02-28T00:00:00", absl::FormatCivilTime(cs)); + cs = absl::CivilSecond(2013, 11, 15, 16, 32, 14 - 123456789); + EXPECT_EQ("2009-12-17T18:59:05", absl::FormatCivilTime(cs)); + cs = absl::CivilSecond(2013, 11, 15, 16, 32 - 1234567, 14); + EXPECT_EQ("2011-07-12T08:25:14", absl::FormatCivilTime(cs)); + cs = absl::CivilSecond(2013, 11, 15, 16 - 123456, 32, 14); + EXPECT_EQ("1999-10-16T16:32:14", absl::FormatCivilTime(cs)); + cs = absl::CivilSecond(2013, 11, 15 - 1234, 16, 32, 14); + EXPECT_EQ("2010-06-30T16:32:14", absl::FormatCivilTime(cs)); + cs = absl::CivilSecond(2013, 11 - 123, 15, 16, 32, 14); + EXPECT_EQ("2003-08-15T16:32:14", absl::FormatCivilTime(cs)); +} + +TEST(CivilTime, NormalizeMishmash) { + absl::CivilSecond cs; + cs = absl::CivilSecond(2013, 11 - 123, 15 + 1234, 16 - 123456, 32 + 1234567, + 14 - 123456789); + EXPECT_EQ("1991-05-09T03:06:05", absl::FormatCivilTime(cs)); + cs = absl::CivilSecond(2013, 11 + 123, 15 - 1234, 16 + 123456, 32 - 1234567, + 14 + 123456789); + EXPECT_EQ("2036-05-24T05:58:23", absl::FormatCivilTime(cs)); + + cs = absl::CivilSecond(2013, 11, -146097 + 1, 16, 32, 14); + EXPECT_EQ("1613-11-01T16:32:14", absl::FormatCivilTime(cs)); + cs = absl::CivilSecond(2013, 11 + 400 * 12, -146097 + 1, 16, 32, 14); + EXPECT_EQ("2013-11-01T16:32:14", absl::FormatCivilTime(cs)); +} + +// Convert all the days from 1970-1-1 to 1970-1-146097 (aka 2369-12-31) +// and check that they normalize to the expected time. 146097 days span +// the 400-year Gregorian cycle used during normalization. +TEST(CivilTime, NormalizeAllTheDays) { + absl::CivilDay expected(1970, 1, 1); + for (int day = 1; day <= 146097; ++day) { + absl::CivilSecond cs(1970, 1, day, 0, 0, 0); + EXPECT_EQ(expected, cs); + ++expected; + } +} + +TEST(CivilTime, NormalizeWithHugeYear) { + absl::CivilMonth c(9223372036854775807, 1); + EXPECT_EQ("9223372036854775807-01", absl::FormatCivilTime(c)); + c = c - 1; // Causes normalization + EXPECT_EQ("9223372036854775806-12", absl::FormatCivilTime(c)); + + c = absl::CivilMonth(-9223372036854775807 - 1, 1); + EXPECT_EQ("-9223372036854775808-01", absl::FormatCivilTime(c)); + c = c + 12; // Causes normalization + EXPECT_EQ("-9223372036854775807-01", absl::FormatCivilTime(c)); +} + +TEST(CivilTime, LeapYears) { + const absl::CivilSecond s1(2013, 2, 28 + 1, 0, 0, 0); + EXPECT_EQ("2013-03-01T00:00:00", absl::FormatCivilTime(s1)); + + const absl::CivilSecond s2(2012, 2, 28 + 1, 0, 0, 0); + EXPECT_EQ("2012-02-29T00:00:00", absl::FormatCivilTime(s2)); + + const absl::CivilSecond s3(1900, 2, 28 + 1, 0, 0, 0); + EXPECT_EQ("1900-03-01T00:00:00", absl::FormatCivilTime(s3)); + + const struct { + int year; + int days; + struct { + int month; + int day; + } leap_day; // The date of the day after Feb 28. + } kLeapYearTable[]{ + {1900, 365, {3, 1}}, + {1999, 365, {3, 1}}, + {2000, 366, {2, 29}}, // leap year + {2001, 365, {3, 1}}, + {2002, 365, {3, 1}}, + {2003, 365, {3, 1}}, + {2004, 366, {2, 29}}, // leap year + {2005, 365, {3, 1}}, + {2006, 365, {3, 1}}, + {2007, 365, {3, 1}}, + {2008, 366, {2, 29}}, // leap year + {2009, 365, {3, 1}}, + {2100, 365, {3, 1}}, + }; + + for (int i = 0; i < ABSL_ARRAYSIZE(kLeapYearTable); ++i) { + const int y = kLeapYearTable[i].year; + const int m = kLeapYearTable[i].leap_day.month; + const int d = kLeapYearTable[i].leap_day.day; + const int n = kLeapYearTable[i].days; + + // Tests incrementing through the leap day. + const absl::CivilDay feb28(y, 2, 28); + const absl::CivilDay next_day = feb28 + 1; + EXPECT_EQ(m, next_day.month()); + EXPECT_EQ(d, next_day.day()); + + // Tests difference in days of leap years. + const absl::CivilYear year(feb28); + const absl::CivilYear next_year = year + 1; + EXPECT_EQ(n, absl::CivilDay(next_year) - absl::CivilDay(year)); + } +} + +TEST(CivilTime, FirstThursdayInMonth) { + const absl::CivilDay nov1(2014, 11, 1); + const absl::CivilDay thursday = + absl::PrevWeekday(nov1, absl::Weekday::thursday) + 7; + EXPECT_EQ("2014-11-06", absl::FormatCivilTime(thursday)); + + // Bonus: Date of Thanksgiving in the United States + // Rule: Fourth Thursday of November + const absl::CivilDay thanksgiving = thursday + 7 * 3; + EXPECT_EQ("2014-11-27", absl::FormatCivilTime(thanksgiving)); +} + +TEST(CivilTime, DocumentationExample) { + absl::CivilSecond second(2015, 6, 28, 1, 2, 3); // 2015-06-28 01:02:03 + absl::CivilMinute minute(second); // 2015-06-28 01:02:00 + absl::CivilDay day(minute); // 2015-06-28 00:00:00 + + second -= 1; // 2015-06-28 01:02:02 + --second; // 2015-06-28 01:02:01 + EXPECT_EQ(minute, second - 1); // Comparison between types + EXPECT_LT(minute, second); + + // int diff = second - minute; // ERROR: Mixed types, won't compile + + absl::CivilDay june_1(2015, 6, 1); // Pass fields to c'tor. + int diff = day - june_1; // Num days between 'day' and June 1 + EXPECT_EQ(27, diff); + + // Fields smaller than alignment are floored to their minimum value. + absl::CivilDay day_floor(2015, 1, 2, 9, 9, 9); + EXPECT_EQ(0, day_floor.hour()); // 09:09:09 is floored + EXPECT_EQ(absl::CivilDay(2015, 1, 2), day_floor); + + // Unspecified fields default to their minium value + absl::CivilDay day_default(2015); // Defaults to Jan 1 + EXPECT_EQ(absl::CivilDay(2015, 1, 1), day_default); + + // Iterates all the days of June. + absl::CivilMonth june(day); // CivilDay -> CivilMonth + absl::CivilMonth july = june + 1; + for (absl::CivilDay day = june_1; day < july; ++day) { + // ... + } +} + +} // namespace |