1 files changed, 52 insertions, 0 deletions
diff --git a/libcxx/test/std/utilities/time/time.duration/time.duration.cast/duration_cast.pass.cpp b/libcxx/test/std/utilities/time/time.duration/time.duration.cast/duration_cast.pass.cpp
new file mode 100644
index 00000000000..1c87fcd909e
--- /dev/null
+++ b/libcxx/test/std/utilities/time/time.duration/time.duration.cast/duration_cast.pass.cpp
@@ -0,0 +1,52 @@
+//===----------------------------------------------------------------------===//
+//
+//                     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>
+
+// duration
+
+// template <class ToDuration, class Rep, class Period>
+//   constexpr
+//   ToDuration
+//   duration_cast(const duration<Rep, Period>& d);
+
+#include <chrono>
+#include <type_traits>
+#include <cassert>
+
+template <class ToDuration, class FromDuration>
+void
+test(const FromDuration& f, const ToDuration& d)
+{
+    {
+    typedef decltype(std::chrono::duration_cast<ToDuration>(f)) R;
+    static_assert((std::is_same<R, ToDuration>::value), "");
+    assert(std::chrono::duration_cast<ToDuration>(f) == d);
+    }
+}
+
+int main()
+{
+    test(std::chrono::milliseconds(7265000), std::chrono::hours(2));
+    test(std::chrono::milliseconds(7265000), std::chrono::minutes(121));
+    test(std::chrono::milliseconds(7265000), std::chrono::seconds(7265));
+    test(std::chrono::milliseconds(7265000), std::chrono::milliseconds(7265000));
+    test(std::chrono::milliseconds(7265000), std::chrono::microseconds(7265000000LL));
+    test(std::chrono::milliseconds(7265000), std::chrono::nanoseconds(7265000000000LL));
+    test(std::chrono::milliseconds(7265000),
+         std::chrono::duration<double, std::ratio<3600> >(7265./3600));
+    test(std::chrono::duration<int, std::ratio<2, 3> >(9),
+         std::chrono::duration<int, std::ratio<3, 5> >(10));
+#ifndef _LIBCPP_HAS_NO_CONSTEXPR
+    {
+    constexpr std::chrono::hours h = std::chrono::duration_cast<std::chrono::hours>(std::chrono::milliseconds(7265000));
+    static_assert(h.count() == 2, "");
+    }
+#endif
+}