[libcxx-commits] [libcxx] 0df9a72 - [NFC][libc++][chrono] Improves test coverage.

[Mark de Wever via libcxx-commits]

Author: Mark de Wever
Date: 2022-12-21T17:53:23+01:00
New Revision: 0df9a72f283a5c2b6f0435bd988e1fd70ed5b477

URL: https://github.com/llvm/llvm-project/commit/0df9a72f283a5c2b6f0435bd988e1fd70ed5b477
DIFF: https://github.com/llvm/llvm-project/commit/0df9a72f283a5c2b6f0435bd988e1fd70ed5b477.diff

LOG: [NFC][libc++][chrono] Improves test coverage.

The function year_month_weekday::sys_days should work properly with a
weekday index of 0 per [time.cal.ymwd.members]/20. This adds a test for
this case.

Reviewed By: #libc, ldionne

Differential Revision: https://reviews.llvm.org/D139126

Added: 
    

Modified: 
    libcxx/test/std/time/time.cal/time.cal.ymwd/time.cal.ymwd.members/op.sys_days.pass.cpp

Removed: 
    


################################################################################
diff  --git a/libcxx/test/std/time/time.cal/time.cal.ymwd/time.cal.ymwd.members/op.sys_days.pass.cpp b/libcxx/test/std/time/time.cal/time.cal.ymwd/time.cal.ymwd.members/op.sys_days.pass.cpp
index 9bfa0472f7bce..3ca32d926cbab 100644
--- a/libcxx/test/std/time/time.cal/time.cal.ymwd/time.cal.ymwd.members/op.sys_days.pass.cpp
+++ b/libcxx/test/std/time/time.cal/time.cal.ymwd/time.cal.ymwd.members/op.sys_days.pass.cpp
@@ -70,5 +70,14 @@ int main(int, char**)
     assert( year_month_weekday{sd} == ymwd); // and back
     }
 
+    {
+    // Index 0 returns 7 weekdays before index 1 and can't be round-tripped.
+    constexpr year_month_weekday ymwd{year{2000}, month{2}, weekday_indexed{std::chrono::Wednesday, 0}};
+    constexpr sys_days sd{ymwd};
+
+    static_assert(sd.time_since_epoch() == days{10957 + 25});
+    static_assert(year_month_weekday{sd} != ymwd); // and back fails
+    }
+
     return 0;
 }