1 files changed, 42 insertions, 0 deletions
diff --git a/test/std/utilities/time/time.traits/time.traits.specializations/duration.pass.cpp b/test/std/utilities/time/time.traits/time.traits.specializations/duration.pass.cpp
new file mode 100644
index 000000000000..f942844b60a6
--- /dev/null
+++ b/test/std/utilities/time/time.traits/time.traits.specializations/duration.pass.cpp
@@ -0,0 +1,42 @@
+//===----------------------------------------------------------------------===//
+//
+//                     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.
+//
+//===----------------------------------------------------------------------===//
+
+// <chrono>
+
+// template <class Rep1, class Period1, class Rep2, class Period2>
+// struct common_type<chrono::duration<Rep1, Period1>, chrono::duration<Rep2, Period2>>
+// {
+//     typedef chrono::duration<typename common_type<Rep1, Rep2>::type, see below }> type;
+// };
+
+#include <chrono>
+
+template <class D1, class D2, class De>
+void
+test()
+{
+    typedef typename std::common_type<D1, D2>::type Dc;
+    static_assert((std::is_same<Dc, De>::value), "");
+}
+
+int main()
+{
+    test<std::chrono::duration<int, std::ratio<1, 100> >,
+         std::chrono::duration<long, std::ratio<1, 1000> >,
+         std::chrono::duration<long, std::ratio<1, 1000> > >();
+    test<std::chrono::duration<long, std::ratio<1, 100> >,
+         std::chrono::duration<int, std::ratio<1, 1000> >,
+         std::chrono::duration<long, std::ratio<1, 1000> > >();
+    test<std::chrono::duration<char, std::ratio<1, 30> >,
+         std::chrono::duration<short, std::ratio<1, 1000> >,
+         std::chrono::duration<int, std::ratio<1, 3000> > >();
+    test<std::chrono::duration<double, std::ratio<21, 1> >,
+         std::chrono::duration<short, std::ratio<15, 1> >,
+         std::chrono::duration<double, std::ratio<3, 1> > >();
+}