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177 lines (142 loc) · 5.72 KB
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#include <gtest/gtest.h>
#include <tempoch/tempoch.hpp>
#include <limits>
#include <type_traits>
using namespace tempoch;
TEST(Time, SplitRoundtripThroughFormats) {
auto tt = Time<scale::TT>::from_split_seconds(qtty::Second(123456.0), qtty::Second(0.125));
auto jd = tt.to<format::JD>();
auto mjd = tt.to<format::MJD>();
auto j2000 = tt.to<format::J2000s>();
auto jd_back = Time<scale::TT>::from_encoded(jd);
auto mjd_back = Time<scale::TT>::from_encoded(mjd);
auto j2000_back = Time<scale::TT>::from_encoded(j2000);
EXPECT_NEAR((jd_back - tt).value(), 0.0, 2e-5);
EXPECT_NEAR((mjd_back - tt).value(), 0.0, 5e-7);
EXPECT_NEAR((j2000_back - tt).value(), 0.0, 1e-12);
}
TEST(Time, UnixAndGpsRemainSecondFormats) {
auto utc = Time<scale::UTC>::from_civil({1970, 1, 1, 0, 0, 0});
auto unix = utc.to<format::Unix>();
EXPECT_NEAR(unix.value(), 9.43e-06, 1e-9);
auto unix_back = Time<scale::UTC>::from_encoded(unix).to_civil();
EXPECT_EQ(unix_back.year, 1970);
EXPECT_EQ(unix_back.month, 1);
EXPECT_EQ(unix_back.day, 1);
auto tai = utc.to<scale::TAI>();
auto gps = tai.to<format::GPS>();
auto gps_back = Time<scale::TAI>::from_encoded(gps);
EXPECT_NEAR((gps_back - tai).value(), 0.0, 1e-9);
}
TEST(Time, JulianDateTypesAreDistinct) {
static_assert(!std::is_same_v<JulianDate<scale::TT>, JulianDate<scale::UT1>>);
static_assert(!std::is_same_v<JulianDate<scale::TT>, JulianDate<scale::UTC>>);
static_assert(!std::is_same_v<ModifiedJulianDate<scale::TT>, ModifiedJulianDate<scale::UT1>>);
}
TEST(Time, CivilUtcRoundtrip) {
CivilTime original(2026, 7, 15, 22, 0, 0);
auto utc = Time<scale::UTC>::from_civil(original);
auto roundtrip = utc.to_civil();
EXPECT_EQ(roundtrip.year, 2026);
EXPECT_EQ(roundtrip.month, 7);
EXPECT_EQ(roundtrip.day, 15);
EXPECT_EQ(roundtrip.hour, 22);
EXPECT_EQ(roundtrip.minute, 0);
EXPECT_EQ(roundtrip.second, 0);
}
TEST(Time, PreDefinitionUtcRequiresOptIn) {
CivilTime pre_definition(1900, 1, 1, 0, 0, 0);
EXPECT_THROW(Time<scale::UTC>::from_civil(pre_definition), ConversionFailedError);
auto ctx = TimeContext().allow_pre_definition_utc();
EXPECT_NO_THROW({
auto utc = Time<scale::UTC>::from_civil(pre_definition, ctx);
auto civil = utc.to_civil(ctx);
EXPECT_EQ(civil.year, 1900);
});
}
TEST(Time, Ut1HorizonErrorsSurfaceThroughContextBackedConversion) {
auto far_future = Time<scale::TT>::from_encoded(JulianDate<scale::TT>(2'500'000.0));
auto ctx = TimeContext::with_builtin_eop();
EXPECT_THROW((far_future.to_with<scale::UT1>(ctx)), Ut1HorizonExceededError);
}
TEST(Time, ArithmeticIsAffineAndSecondBased) {
auto tt = Time<scale::TT>::from_raw_j2000_seconds(qtty::Second(10.0));
auto later = tt + qtty::Hour(1.0);
auto diff = later - tt;
EXPECT_NEAR(diff.to<qtty::Second>().value(), 3600.0, 1e-9);
EXPECT_NEAR(tt.split_seconds().first.value(), 10.0, 1e-12);
}
TEST(Time, QttyDurationArithmeticSupportsMultipleUnits) {
auto tt = Time<scale::TT>::from_split_seconds(qtty::Second(1000.0), qtty::Second(0.5));
tt += qtty::Minute(2.0);
tt -= qtty::Second(30.5);
auto shifted = tt + qtty::Day(0.25);
EXPECT_NEAR((tt - Time<scale::TT>::from_raw_j2000_seconds(qtty::Second(1000.0)))
.to<qtty::Second>()
.value(),
90.0, 1e-9);
EXPECT_NEAR((shifted - tt).to<qtty::Hour>().value(), 6.0, 1e-9);
EXPECT_NEAR(tt.total_seconds().value(), 1090.0, 1e-12);
}
TEST(Time, EncodedTryNewAndRawQuantityRejectNonFiniteValues) {
auto valid = JulianDate<scale::TT>::try_new(qtty::Day(2451545.0));
ASSERT_TRUE(valid.has_value());
EXPECT_NEAR(valid->value(), 2451545.0, 1e-12);
EXPECT_FALSE(JulianDate<scale::TT>::try_new(qtty::Day(std::numeric_limits<double>::infinity()))
.has_value());
EXPECT_THROW(JulianDate<scale::TT>::from_raw(qtty::Day(std::numeric_limits<double>::quiet_NaN())),
ConversionFailedError);
}
TEST(Time, EncodedComparisonsMinMaxMeanAndStream) {
auto a = JulianDate<scale::TT>::J2000();
auto b = a + qtty::Hour(48.0);
EXPECT_TRUE(a < b);
EXPECT_TRUE(a <= b);
EXPECT_TRUE(b > a);
EXPECT_TRUE(b >= a);
EXPECT_TRUE(a != b);
EXPECT_EQ(a.min(b), a);
EXPECT_EQ(a.max(b), b);
EXPECT_NEAR(a.mean(b).jd_value(), a.jd_value() + 1.0, 1e-12);
}
TEST(Time, TtJulianDateConvenienceUtcRoundtrip) {
auto jd = JulianDate<scale::TT>::from_utc({2026, 7, 15, 22, 0, 0});
auto utc = jd.to_utc();
EXPECT_EQ(utc.year, 2026);
EXPECT_EQ(utc.month, 7);
EXPECT_EQ(utc.day, 15);
EXPECT_NEAR(utc.hour, 22, 1);
}
TEST(Time, TtMjdConvenienceUtcRoundtrip) {
auto mjd = ModifiedJulianDate<scale::TT>::from_utc({2026, 7, 15, 22, 0, 0});
auto utc = mjd.to_utc();
EXPECT_EQ(utc.year, 2026);
EXPECT_EQ(utc.month, 7);
EXPECT_EQ(utc.day, 15);
EXPECT_NEAR(utc.hour, 22, 1);
}
TEST(Time, EncodedDateArithmeticSupportsAssignOperators) {
auto jd = JulianDate<scale::TT>::J2000();
jd += qtty::Hour(24.0);
jd -= qtty::Hour(12.0);
EXPECT_NEAR(jd.jd_value(), 2451545.5, 1e-10);
auto mjd = jd.to_mjd();
mjd += qtty::Minute(720.0);
EXPECT_NEAR(mjd.to_jd().jd_value(), 2451546.0, 1e-10);
}
TEST(Time, EncodedDateHelpersExposeExpectedValues) {
auto jd = JulianDate<scale::TT>::J2000();
auto next = jd + qtty::Day(36525.0);
auto mjd = ModifiedJulianDate<scale::TT>::from_jd(jd);
EXPECT_NEAR(jd.julian_centuries(), 0.0, 1e-12);
EXPECT_NEAR(next.julian_centuries(), 1.0, 1e-12);
EXPECT_NEAR(mjd.mjd_value(), jd.jd_value() - 2400000.5, 1e-12);
EXPECT_NEAR(JulianDate<scale::TT>::from_mjd(mjd).jd_value(), jd.jd_value(), 1e-12);
}
TEST(Time, EncodedDateMinMaxAndMeanRemainAvailable) {
auto a = JulianDate<scale::TT>::J2000();
auto b = a + qtty::Day(2.0);
EXPECT_EQ(a.min(b), a);
EXPECT_EQ(a.max(b), b);
EXPECT_NEAR(a.mean(b).jd_value(), a.jd_value() + 1.0, 1e-12);
}