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* [gcc r13-4100] libstdc++: Add test for chrono::utc_clock leap second offset
@ 2022-11-16 15:07 Jonathan Wakely
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From: Jonathan Wakely @ 2022-11-16 15:07 UTC (permalink / raw)
To: gcc-cvs, libstdc++-cvs
https://gcc.gnu.org/g:7026d0455dce1092975d4884f450a12a6ed205c7
commit r13-4100-g7026d0455dce1092975d4884f450a12a6ed205c7
Author: Jonathan Wakely <jwakely@redhat.com>
Date: Wed Nov 16 15:04:32 2022 +0000
libstdc++: Add test for chrono::utc_clock leap second offset
This test of leap second handling is taken from the C++20 standard.
libstdc++-v3/ChangeLog:
* testsuite/std/time/clock/utc/1.cc: Check handling across leap
second insertion.
Diff:
---
libstdc++-v3/testsuite/std/time/clock/utc/1.cc | 24 ++++++++++++++++++++++++
1 file changed, 24 insertions(+)
diff --git a/libstdc++-v3/testsuite/std/time/clock/utc/1.cc b/libstdc++-v3/testsuite/std/time/clock/utc/1.cc
index eef5f3c3a48..18578fb1ab1 100644
--- a/libstdc++-v3/testsuite/std/time/clock/utc/1.cc
+++ b/libstdc++-v3/testsuite/std/time/clock/utc/1.cc
@@ -9,6 +9,8 @@ test01()
{
using namespace std::chrono;
+ // [time.clock.utc.overview]
+
auto epoch = sys_seconds{sys_days{1970y/January/1}};
auto utc_epoch = clock_cast<utc_clock>(epoch);
VERIFY( utc_epoch.time_since_epoch() == 0s );
@@ -18,7 +20,29 @@ test01()
VERIFY( utc_y2k.time_since_epoch() == 946'684'822s );
}
+void
+test02()
+{
+ using namespace std::chrono;
+
+ // [time.clock.utc.members]
+
+ auto t = sys_days{July/1/2015} - 2ns;
+ auto u = utc_clock::from_sys(t);
+ VERIFY(u.time_since_epoch() - t.time_since_epoch() == 25s);
+ t += 1ns;
+ u = utc_clock::from_sys(t);
+ VERIFY(u.time_since_epoch() - t.time_since_epoch() == 25s);
+ t += 1ns;
+ u = utc_clock::from_sys(t);
+ VERIFY(u.time_since_epoch() - t.time_since_epoch() == 26s);
+ t += 1ns;
+ u = utc_clock::from_sys(t);
+ VERIFY(u.time_since_epoch() - t.time_since_epoch() == 26s);
+}
+
int main()
{
test01();
+ test02();
}
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