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-rw-r--r--libcxx/test/std/utilities/time/time.duration/time.duration.alg/abs.fail.cpp27
-rw-r--r--libcxx/test/std/utilities/time/time.duration/time.duration.alg/abs.pass.cpp50
-rw-r--r--libcxx/test/std/utilities/time/time.duration/time.duration.cast/ceil.fail.cpp26
-rw-r--r--libcxx/test/std/utilities/time/time.duration/time.duration.cast/ceil.pass.cpp51
-rw-r--r--libcxx/test/std/utilities/time/time.duration/time.duration.cast/floor.fail.cpp26
-rw-r--r--libcxx/test/std/utilities/time/time.duration/time.duration.cast/floor.pass.cpp50
-rw-r--r--libcxx/test/std/utilities/time/time.duration/time.duration.cast/round.fail.cpp26
-rw-r--r--libcxx/test/std/utilities/time/time.duration/time.duration.cast/round.pass.cpp50
-rw-r--r--libcxx/test/std/utilities/time/time.point/time.point.cast/ceil.fail.cpp26
-rw-r--r--libcxx/test/std/utilities/time/time.point/time.point.cast/ceil.pass.cpp69
-rw-r--r--libcxx/test/std/utilities/time/time.point/time.point.cast/floor.fail.cpp26
-rw-r--r--libcxx/test/std/utilities/time/time.point/time.point.cast/floor.pass.cpp68
-rw-r--r--libcxx/test/std/utilities/time/time.point/time.point.cast/round.fail.cpp26
-rw-r--r--libcxx/test/std/utilities/time/time.point/time.point.cast/round.pass.cpp68
14 files changed, 589 insertions, 0 deletions
diff --git a/libcxx/test/std/utilities/time/time.duration/time.duration.alg/abs.fail.cpp b/libcxx/test/std/utilities/time/time.duration/time.duration.alg/abs.fail.cpp
new file mode 100644
index 00000000000..221004c568c
--- /dev/null
+++ b/libcxx/test/std/utilities/time/time.duration/time.duration.alg/abs.fail.cpp
@@ -0,0 +1,27 @@
+//===----------------------------------------------------------------------===//
+//
+// 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++03, c++11, c++14
+// <chrono>
+
+// ceil
+
+// template <class Rep, class Period>
+// constexpr duration<Rep, Period> abs(duration<Rep, Period> d)
+
+// This function shall not participate in overload resolution unless numeric_limits<Rep>::is_signed is true.
+
+#include <chrono>
+
+typedef std::chrono::duration<unsigned> unsigned_secs;
+
+int main()
+{
+ std::chrono::abs(unsigned_secs(0));
+}
diff --git a/libcxx/test/std/utilities/time/time.duration/time.duration.alg/abs.pass.cpp b/libcxx/test/std/utilities/time/time.duration/time.duration.alg/abs.pass.cpp
new file mode 100644
index 00000000000..ec32c37a942
--- /dev/null
+++ b/libcxx/test/std/utilities/time/time.duration/time.duration.alg/abs.pass.cpp
@@ -0,0 +1,50 @@
+//===----------------------------------------------------------------------===//
+//
+// 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++03, c++11, c++14
+
+// <chrono>
+
+// abs
+
+// template <class Rep, class Period>
+// constexpr duration<Rep, Period> abs(duration<Rep, Period> d)
+
+#include <chrono>
+#include <type_traits>
+#include <cassert>
+
+template <class Duration>
+void
+test(const Duration& f, const Duration& d)
+{
+ {
+ typedef decltype(std::chrono::abs(f)) R;
+ static_assert((std::is_same<R, Duration>::value), "");
+ assert(std::chrono::abs(f) == d);
+ }
+}
+
+int main()
+{
+// 7290000ms is 2 hours, 1 minute, and 30 seconds
+ test(std::chrono::milliseconds( 7290000), std::chrono::milliseconds( 7290000));
+ test(std::chrono::milliseconds(-7290000), std::chrono::milliseconds( 7290000));
+ test(std::chrono::minutes( 122), std::chrono::minutes( 122));
+ test(std::chrono::minutes(-122), std::chrono::minutes( 122));
+ test(std::chrono::hours(0), std::chrono::hours(0));
+
+ {
+// 9000000ms is 2 hours and 30 minutes
+ constexpr std::chrono::hours h1 = std::chrono::abs(std::chrono::hours(-3));
+ static_assert(h1.count() == 3, "");
+ constexpr std::chrono::hours h2 = std::chrono::abs(std::chrono::hours(3));
+ static_assert(h2.count() == 3, "");
+ }
+}
diff --git a/libcxx/test/std/utilities/time/time.duration/time.duration.cast/ceil.fail.cpp b/libcxx/test/std/utilities/time/time.duration/time.duration.cast/ceil.fail.cpp
new file mode 100644
index 00000000000..909e8573247
--- /dev/null
+++ b/libcxx/test/std/utilities/time/time.duration/time.duration.cast/ceil.fail.cpp
@@ -0,0 +1,26 @@
+//===----------------------------------------------------------------------===//
+//
+// 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++03, c++11, c++14
+// <chrono>
+
+// ceil
+
+// template <class ToDuration, class Rep, class Period>
+// ToDuration
+// ceil(const duration<Rep, Period>& d);
+
+// ToDuration shall be an instantiation of duration.
+
+#include <chrono>
+
+int main()
+{
+ std::chrono::ceil<int>(std::chrono::milliseconds(3));
+}
diff --git a/libcxx/test/std/utilities/time/time.duration/time.duration.cast/ceil.pass.cpp b/libcxx/test/std/utilities/time/time.duration/time.duration.cast/ceil.pass.cpp
new file mode 100644
index 00000000000..6fb73b97db1
--- /dev/null
+++ b/libcxx/test/std/utilities/time/time.duration/time.duration.cast/ceil.pass.cpp
@@ -0,0 +1,51 @@
+//===----------------------------------------------------------------------===//
+//
+// 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++03, c++11, c++14
+
+// <chrono>
+
+// ceil
+
+// template <class ToDuration, class Rep, class Period>
+// constexpr
+// ToDuration
+// ceil(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::ceil<ToDuration>(f)) R;
+ static_assert((std::is_same<R, ToDuration>::value), "");
+ assert(std::chrono::ceil<ToDuration>(f) == d);
+ }
+}
+
+int main()
+{
+// 7290000ms is 2 hours, 1 minute, and 30 seconds
+ test(std::chrono::milliseconds( 7290000), std::chrono::hours( 3));
+ test(std::chrono::milliseconds(-7290000), std::chrono::hours(-2));
+ test(std::chrono::milliseconds( 7290000), std::chrono::minutes( 122));
+ test(std::chrono::milliseconds(-7290000), std::chrono::minutes(-121));
+
+ {
+// 9000000ms is 2 hours and 30 minutes
+ constexpr std::chrono::hours h1 = std::chrono::ceil<std::chrono::hours>(std::chrono::milliseconds(9000000));
+ static_assert(h1.count() == 3, "");
+ constexpr std::chrono::hours h2 = std::chrono::ceil<std::chrono::hours>(std::chrono::milliseconds(-9000000));
+ static_assert(h2.count() == -2, "");
+ }
+}
diff --git a/libcxx/test/std/utilities/time/time.duration/time.duration.cast/floor.fail.cpp b/libcxx/test/std/utilities/time/time.duration/time.duration.cast/floor.fail.cpp
new file mode 100644
index 00000000000..14d9ca878df
--- /dev/null
+++ b/libcxx/test/std/utilities/time/time.duration/time.duration.cast/floor.fail.cpp
@@ -0,0 +1,26 @@
+//===----------------------------------------------------------------------===//
+//
+// 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++03, c++11, c++14
+// <chrono>
+
+// floor
+
+// template <class ToDuration, class Rep, class Period>
+// ToDuration
+// floor(const duration<Rep, Period>& d);
+
+// ToDuration shall be an instantiation of duration.
+
+#include <chrono>
+
+int main()
+{
+ std::chrono::floor<int>(std::chrono::milliseconds(3));
+}
diff --git a/libcxx/test/std/utilities/time/time.duration/time.duration.cast/floor.pass.cpp b/libcxx/test/std/utilities/time/time.duration/time.duration.cast/floor.pass.cpp
new file mode 100644
index 00000000000..57929dd9122
--- /dev/null
+++ b/libcxx/test/std/utilities/time/time.duration/time.duration.cast/floor.pass.cpp
@@ -0,0 +1,50 @@
+//===----------------------------------------------------------------------===//
+//
+// 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++03, c++11, c++14
+// <chrono>
+
+// floor
+
+// template <class ToDuration, class Rep, class Period>
+// constexpr
+// ToDuration
+// floor(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::floor<ToDuration>(f)) R;
+ static_assert((std::is_same<R, ToDuration>::value), "");
+ assert(std::chrono::floor<ToDuration>(f) == d);
+ }
+}
+
+int main()
+{
+// 7290000ms is 2 hours, 1 minute, and 30 seconds
+ test(std::chrono::milliseconds( 7290000), std::chrono::hours( 2));
+ test(std::chrono::milliseconds(-7290000), std::chrono::hours(-3));
+ test(std::chrono::milliseconds( 7290000), std::chrono::minutes( 121));
+ test(std::chrono::milliseconds(-7290000), std::chrono::minutes(-122));
+
+ {
+// 9000000ms is 2 hours and 30 minutes
+ constexpr std::chrono::hours h1 = std::chrono::floor<std::chrono::hours>(std::chrono::milliseconds(9000000));
+ static_assert(h1.count() == 2, "");
+ constexpr std::chrono::hours h2 = std::chrono::floor<std::chrono::hours>(std::chrono::milliseconds(-9000000));
+ static_assert(h2.count() == -3, "");
+ }
+}
diff --git a/libcxx/test/std/utilities/time/time.duration/time.duration.cast/round.fail.cpp b/libcxx/test/std/utilities/time/time.duration/time.duration.cast/round.fail.cpp
new file mode 100644
index 00000000000..6f9f5bd29b6
--- /dev/null
+++ b/libcxx/test/std/utilities/time/time.duration/time.duration.cast/round.fail.cpp
@@ -0,0 +1,26 @@
+//===----------------------------------------------------------------------===//
+//
+// 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++03, c++11, c++14
+// <chrono>
+
+// round
+
+// template <class ToDuration, class Rep, class Period>
+// ToDuration
+// round(const duration<Rep, Period>& d);
+
+// ToDuration shall be an instantiation of duration.
+
+#include <chrono>
+
+int main()
+{
+ std::chrono::round<int>(std::chrono::milliseconds(3));
+}
diff --git a/libcxx/test/std/utilities/time/time.duration/time.duration.cast/round.pass.cpp b/libcxx/test/std/utilities/time/time.duration/time.duration.cast/round.pass.cpp
new file mode 100644
index 00000000000..e50b85c991a
--- /dev/null
+++ b/libcxx/test/std/utilities/time/time.duration/time.duration.cast/round.pass.cpp
@@ -0,0 +1,50 @@
+//===----------------------------------------------------------------------===//
+//
+// 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++03, c++11, c++14
+// <chrono>
+
+// round
+
+// template <class ToDuration, class Rep, class Period>
+// constexpr
+// ToDuration
+// ceil(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::round<ToDuration>(f)) R;
+ static_assert((std::is_same<R, ToDuration>::value), "");
+ assert(std::chrono::round<ToDuration>(f) == d);
+ }
+}
+
+int main()
+{
+// 7290000ms is 2 hours, 1 minute, and 30 seconds
+ test(std::chrono::milliseconds( 7290000), std::chrono::hours( 2));
+ test(std::chrono::milliseconds(-7290000), std::chrono::hours(-2));
+ test(std::chrono::milliseconds( 7290000), std::chrono::minutes( 122));
+ test(std::chrono::milliseconds(-7290000), std::chrono::minutes(-122));
+
+ {
+// 9000000ms is 2 hours and 30 minutes
+ constexpr std::chrono::hours h1 = std::chrono::round<std::chrono::hours>(std::chrono::milliseconds(9000000));
+ static_assert(h1.count() == 2, "");
+ constexpr std::chrono::hours h2 = std::chrono::round<std::chrono::hours>(std::chrono::milliseconds(-9000000));
+ static_assert(h2.count() == -2, "");
+ }
+}
diff --git a/libcxx/test/std/utilities/time/time.point/time.point.cast/ceil.fail.cpp b/libcxx/test/std/utilities/time/time.point/time.point.cast/ceil.fail.cpp
new file mode 100644
index 00000000000..1c92d75b97c
--- /dev/null
+++ b/libcxx/test/std/utilities/time/time.point/time.point.cast/ceil.fail.cpp
@@ -0,0 +1,26 @@
+//===----------------------------------------------------------------------===//
+//
+// 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++03, c++11, c++14
+// <chrono>
+
+// ceil
+
+// template <class ToDuration, class Clock, class Duration>
+// time_point<Clock, ToDuration>
+// ceil(const time_point<Clock, Duration>& t);
+
+// ToDuration shall be an instantiation of duration.
+
+#include <chrono>
+
+int main()
+{
+ std::chrono::ceil<int>(std::chrono::system_clock::now());
+}
diff --git a/libcxx/test/std/utilities/time/time.point/time.point.cast/ceil.pass.cpp b/libcxx/test/std/utilities/time/time.point/time.point.cast/ceil.pass.cpp
new file mode 100644
index 00000000000..379929c7f2d
--- /dev/null
+++ b/libcxx/test/std/utilities/time/time.point/time.point.cast/ceil.pass.cpp
@@ -0,0 +1,69 @@
+//===----------------------------------------------------------------------===//
+//
+// 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++03, c++11, c++14
+// <chrono>
+
+// ceil
+
+// template <class ToDuration, class Clock, class Duration>
+// time_point<Clock, ToDuration>
+// ceil(const time_point<Clock, Duration>& t);
+
+#include <chrono>
+#include <type_traits>
+#include <cassert>
+
+template <class FromDuration, class ToDuration>
+void
+test(const FromDuration& df, const ToDuration& d)
+{
+ typedef std::chrono::system_clock Clock;
+ typedef std::chrono::time_point<Clock, FromDuration> FromTimePoint;
+ typedef std::chrono::time_point<Clock, ToDuration> ToTimePoint;
+ {
+ FromTimePoint f(df);
+ ToTimePoint t(d);
+ typedef decltype(std::chrono::ceil<ToDuration>(f)) R;
+ static_assert((std::is_same<R, ToTimePoint>::value), "");
+ assert(std::chrono::ceil<ToDuration>(f) == t);
+ }
+}
+
+template<class FromDuration, long long From, class ToDuration, long long To>
+void test_constexpr ()
+{
+ typedef std::chrono::system_clock Clock;
+ typedef std::chrono::time_point<Clock, FromDuration> FromTimePoint;
+ typedef std::chrono::time_point<Clock, ToDuration> ToTimePoint;
+ {
+ constexpr FromTimePoint f{FromDuration{From}};
+ constexpr ToTimePoint t{ToDuration{To}};
+ static_assert(std::chrono::ceil<ToDuration>(f) == t, "");
+ }
+}
+
+
+int main()
+{
+// 7290000ms is 2 hours, 1 minute, and 30 seconds
+ test(std::chrono::milliseconds( 7290000), std::chrono::hours( 3));
+ test(std::chrono::milliseconds(-7290000), std::chrono::hours(-2));
+ test(std::chrono::milliseconds( 7290000), std::chrono::minutes( 122));
+ test(std::chrono::milliseconds(-7290000), std::chrono::minutes(-121));
+
+// 9000000ms is 2 hours and 30 minutes
+ test_constexpr<std::chrono::milliseconds, 9000000, std::chrono::hours, 3> ();
+ test_constexpr<std::chrono::milliseconds,-9000000, std::chrono::hours, -2> ();
+ test_constexpr<std::chrono::milliseconds, 9000001, std::chrono::minutes, 151> ();
+ test_constexpr<std::chrono::milliseconds,-9000001, std::chrono::minutes,-150> ();
+
+ test_constexpr<std::chrono::milliseconds, 9000000, std::chrono::seconds, 9000> ();
+ test_constexpr<std::chrono::milliseconds,-9000000, std::chrono::seconds,-9000> ();
+}
diff --git a/libcxx/test/std/utilities/time/time.point/time.point.cast/floor.fail.cpp b/libcxx/test/std/utilities/time/time.point/time.point.cast/floor.fail.cpp
new file mode 100644
index 00000000000..ea48e1219e3
--- /dev/null
+++ b/libcxx/test/std/utilities/time/time.point/time.point.cast/floor.fail.cpp
@@ -0,0 +1,26 @@
+//===----------------------------------------------------------------------===//
+//
+// 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++03, c++11, c++14
+// <chrono>
+
+// floor
+
+// template <class ToDuration, class Clock, class Duration>
+// time_point<Clock, ToDuration>
+// floor(const time_point<Clock, Duration>& t);
+
+// ToDuration shall be an instantiation of duration.
+
+#include <chrono>
+
+int main()
+{
+ std::chrono::floor<int>(std::chrono::system_clock::now());
+}
diff --git a/libcxx/test/std/utilities/time/time.point/time.point.cast/floor.pass.cpp b/libcxx/test/std/utilities/time/time.point/time.point.cast/floor.pass.cpp
new file mode 100644
index 00000000000..d0a908fa932
--- /dev/null
+++ b/libcxx/test/std/utilities/time/time.point/time.point.cast/floor.pass.cpp
@@ -0,0 +1,68 @@
+//===----------------------------------------------------------------------===//
+//
+// 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++03, c++11, c++14
+// <chrono>
+
+// floor
+
+// template <class ToDuration, class Clock, class Duration>
+// time_point<Clock, ToDuration>
+// floor(const time_point<Clock, Duration>& t);
+
+#include <chrono>
+#include <type_traits>
+#include <cassert>
+
+template <class FromDuration, class ToDuration>
+void
+test(const FromDuration& df, const ToDuration& d)
+{
+ typedef std::chrono::system_clock Clock;
+ typedef std::chrono::time_point<Clock, FromDuration> FromTimePoint;
+ typedef std::chrono::time_point<Clock, ToDuration> ToTimePoint;
+ {
+ FromTimePoint f(df);
+ ToTimePoint t(d);
+ typedef decltype(std::chrono::floor<ToDuration>(f)) R;
+ static_assert((std::is_same<R, ToTimePoint>::value), "");
+ assert(std::chrono::floor<ToDuration>(f) == t);
+ }
+}
+
+template<class FromDuration, long long From, class ToDuration, long long To>
+void test_constexpr ()
+{
+ typedef std::chrono::system_clock Clock;
+ typedef std::chrono::time_point<Clock, FromDuration> FromTimePoint;
+ typedef std::chrono::time_point<Clock, ToDuration> ToTimePoint;
+ {
+ constexpr FromTimePoint f{FromDuration{From}};
+ constexpr ToTimePoint t{ToDuration{To}};
+ static_assert(std::chrono::floor<ToDuration>(f) == t, "");
+ }
+}
+
+int main()
+{
+// 7290000ms is 2 hours, 1 minute, and 30 seconds
+ test(std::chrono::milliseconds( 7290000), std::chrono::hours( 2));
+ test(std::chrono::milliseconds(-7290000), std::chrono::hours(-3));
+ test(std::chrono::milliseconds( 7290000), std::chrono::minutes( 121));
+ test(std::chrono::milliseconds(-7290000), std::chrono::minutes(-122));
+
+// 9000000ms is 2 hours and 30 minutes
+ test_constexpr<std::chrono::milliseconds, 9000000, std::chrono::hours, 2> ();
+ test_constexpr<std::chrono::milliseconds,-9000000, std::chrono::hours, -3> ();
+ test_constexpr<std::chrono::milliseconds, 9000001, std::chrono::minutes, 150> ();
+ test_constexpr<std::chrono::milliseconds,-9000001, std::chrono::minutes,-151> ();
+
+ test_constexpr<std::chrono::milliseconds, 9000000, std::chrono::seconds, 9000> ();
+ test_constexpr<std::chrono::milliseconds,-9000000, std::chrono::seconds,-9000> ();
+}
diff --git a/libcxx/test/std/utilities/time/time.point/time.point.cast/round.fail.cpp b/libcxx/test/std/utilities/time/time.point/time.point.cast/round.fail.cpp
new file mode 100644
index 00000000000..53c14f47de6
--- /dev/null
+++ b/libcxx/test/std/utilities/time/time.point/time.point.cast/round.fail.cpp
@@ -0,0 +1,26 @@
+//===----------------------------------------------------------------------===//
+//
+// 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++03, c++11, c++14
+// <chrono>
+
+// round
+
+// template <class ToDuration, class Clock, class Duration>
+// time_point<Clock, ToDuration>
+// round(const time_point<Clock, Duration>& t);
+
+// ToDuration shall be an instantiation of duration.
+
+#include <chrono>
+
+int main()
+{
+ std::chrono::round<int>(std::chrono::system_clock::now());
+}
diff --git a/libcxx/test/std/utilities/time/time.point/time.point.cast/round.pass.cpp b/libcxx/test/std/utilities/time/time.point/time.point.cast/round.pass.cpp
new file mode 100644
index 00000000000..ab8bf3a75e7
--- /dev/null
+++ b/libcxx/test/std/utilities/time/time.point/time.point.cast/round.pass.cpp
@@ -0,0 +1,68 @@
+//===----------------------------------------------------------------------===//
+//
+// 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++03, c++11, c++14
+// <chrono>
+
+// round
+
+// template <class ToDuration, class Clock, class Duration>
+// time_point<Clock, ToDuration>
+// round(const time_point<Clock, Duration>& t);
+
+#include <chrono>
+#include <type_traits>
+#include <cassert>
+
+template <class FromDuration, class ToDuration>
+void
+test(const FromDuration& df, const ToDuration& d)
+{
+ typedef std::chrono::system_clock Clock;
+ typedef std::chrono::time_point<Clock, FromDuration> FromTimePoint;
+ typedef std::chrono::time_point<Clock, ToDuration> ToTimePoint;
+ {
+ FromTimePoint f(df);
+ ToTimePoint t(d);
+ typedef decltype(std::chrono::round<ToDuration>(f)) R;
+ static_assert((std::is_same<R, ToTimePoint>::value), "");
+ assert(std::chrono::round<ToDuration>(f) == t);
+ }
+}
+
+template<class FromDuration, long long From, class ToDuration, long long To>
+void test_constexpr ()
+{
+ typedef std::chrono::system_clock Clock;
+ typedef std::chrono::time_point<Clock, FromDuration> FromTimePoint;
+ typedef std::chrono::time_point<Clock, ToDuration> ToTimePoint;
+ {
+ constexpr FromTimePoint f{FromDuration{From}};
+ constexpr ToTimePoint t{ToDuration{To}};
+ static_assert(std::chrono::round<ToDuration>(f) == t, "");
+ }
+}
+
+int main()
+{
+// 7290000ms is 2 hours, 1 minute, and 30 seconds
+ test(std::chrono::milliseconds( 7290000), std::chrono::hours( 2));
+ test(std::chrono::milliseconds(-7290000), std::chrono::hours(-2));
+ test(std::chrono::milliseconds( 7290000), std::chrono::minutes( 122));
+ test(std::chrono::milliseconds(-7290000), std::chrono::minutes(-122));
+
+// 9000000ms is 2 hours and 30 minutes
+ test_constexpr<std::chrono::milliseconds, 9000000, std::chrono::hours, 2> ();
+ test_constexpr<std::chrono::milliseconds,-9000000, std::chrono::hours, -2> ();
+ test_constexpr<std::chrono::milliseconds, 9000001, std::chrono::minutes, 150> ();
+ test_constexpr<std::chrono::milliseconds,-9000001, std::chrono::minutes,-150> ();
+
+ test_constexpr<std::chrono::milliseconds, 9000000, std::chrono::seconds, 9000> ();
+ test_constexpr<std::chrono::milliseconds,-9000000, std::chrono::seconds,-9000> ();
+}
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