1 files changed, 37 insertions, 0 deletions
diff --git a/test/std/utilities/time/time.cal/time.cal.wdlast/time.cal.wdlast.members/ok.pass.cpp b/test/std/utilities/time/time.cal/time.cal.wdlast/time.cal.wdlast.members/ok.pass.cpp
new file mode 100644
index 000000000000..4bd0f6c2c3fa
--- /dev/null
+++ b/test/std/utilities/time/time.cal/time.cal.wdlast/time.cal.wdlast.members/ok.pass.cpp
@@ -0,0 +1,37 @@
+//===----------------------------------------------------------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is dual licensed under the MIT and the University of Illinois Open
+// Source Licenses. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+// UNSUPPORTED: c++98, c++03, c++11, c++14, c++17
+
+// <chrono>
+// class weekday_last;
+
+//  constexpr bool ok() const noexcept;
+//  Returns: wd_.ok()
+
+#include <chrono>
+#include <type_traits>
+#include <cassert>
+
+#include "test_macros.h"
+
+int main()
+{
+    using weekday      = std::chrono::weekday;
+    using weekday_last = std::chrono::weekday_last;
+
+    ASSERT_NOEXCEPT(                std::declval<const weekday_last>().ok());
+    ASSERT_SAME_TYPE(bool, decltype(std::declval<const weekday_last>().ok()));
+
+    static_assert( weekday_last{weekday{0}}.ok(), "");
+    static_assert( weekday_last{weekday{1}}.ok(), "");
+    static_assert(!weekday_last{weekday{7}}.ok(), "");
+
+    for (unsigned i = 0; i <= 255; ++i)
+        assert(weekday_last{weekday{i}}.ok() == weekday{i}.ok());
+}