1 files changed, 118 insertions, 0 deletions
diff --git a/test/std/utilities/time/time.cal/time.cal.ymd/time.cal.ymd.nonmembers/comparisons.pass.cpp b/test/std/utilities/time/time.cal/time.cal.ymd/time.cal.ymd.nonmembers/comparisons.pass.cpp
new file mode 100644
index 0000000000000..0df684395d45d
--- /dev/null
+++ b/test/std/utilities/time/time.cal/time.cal.ymd/time.cal.ymd.nonmembers/comparisons.pass.cpp
@@ -0,0 +1,118 @@
+//===----------------------------------------------------------------------===//
+//
+//                     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 year_month_day;
+
+// constexpr bool operator==(const year_month_day& x, const year_month_day& y) noexcept;
+//   Returns: x.year() == y.year() && x.month() == y.month().
+//
+// constexpr bool operator< (const year_month_day& x, const year_month_day& y) noexcept;
+//   Returns:
+//      If x.year() < y.year() returns true.
+//      Otherwise, if x.year() > y.year() returns false.
+//      Otherwise, if x.month() < y.month() returns true.
+//      Otherwise, if x.month() > y.month() returns false.
+//      Otherwise, returns x.day() < y.day()
+
+
+#include <chrono>
+#include <type_traits>
+#include <cassert>
+
+#include "test_macros.h"
+#include "test_comparisons.h"
+
+int main()
+{
+    using day        = std::chrono::day;
+    using year       = std::chrono::year;
+    using month      = std::chrono::month;
+    using year_month_day = std::chrono::year_month_day;
+
+    AssertComparisons6AreNoexcept<year_month_day>();
+    AssertComparisons6ReturnBool<year_month_day>();
+
+    constexpr month January = std::chrono::January;
+    constexpr month February = std::chrono::February;
+
+    static_assert( testComparisons6(
+        year_month_day{year{1234}, January, day{1}},
+        year_month_day{year{1234}, January, day{1}},
+        true, false), "");
+
+//  different day
+    static_assert( testComparisons6(
+        year_month_day{year{1234}, January, day{1}},
+        year_month_day{year{1234}, January, day{2}},
+        false, true), "");
+
+//  different month
+    static_assert( testComparisons6(
+        year_month_day{year{1234}, January, day{1}},
+        year_month_day{year{1234}, February, day{1}},
+        false, true), "");
+
+//  different year
+    static_assert( testComparisons6(
+        year_month_day{year{1234}, January, day{1}},
+        year_month_day{year{1235}, January, day{1}},
+        false, true), "");
+
+
+//  different month and day
+    static_assert( testComparisons6(
+        year_month_day{year{1234}, January, day{2}},
+        year_month_day{year{1234}, February, day{1}},
+        false, true), "");
+
+//  different year and month
+    static_assert( testComparisons6(
+        year_month_day{year{1234}, February, day{1}},
+        year_month_day{year{1235}, January, day{1}},
+        false, true), "");
+
+//  different year and day
+    static_assert( testComparisons6(
+        year_month_day{year{1234}, January, day{2}},
+        year_month_day{year{1235}, January, day{1}},
+        false, true), "");
+
+//  different year, month and day
+    static_assert( testComparisons6(
+        year_month_day{year{1234}, February, day{2}},
+        year_month_day{year{1235}, January, day{1}},
+        false, true), "");
+
+
+//  same year, different days
+    for (unsigned i = 1; i < 28; ++i)
+        for (unsigned j = 1; j < 28; ++j)
+            assert((testComparisons6(
+                year_month_day{year{1234}, January, day{i}},
+                year_month_day{year{1234}, January, day{j}},
+                i == j, i < j )));
+
+//  same year, different months
+    for (unsigned i = 1; i < 12; ++i)
+        for (unsigned j = 1; j < 12; ++j)
+            assert((testComparisons6(
+                year_month_day{year{1234}, month{i}, day{12}},
+                year_month_day{year{1234}, month{j}, day{12}},
+                i == j, i < j )));
+
+//  same month, different years
+    for (int i = 1000; i < 20; ++i)
+        for (int j = 1000; j < 20; ++j)
+        assert((testComparisons6(
+            year_month_day{year{i}, January, day{12}},
+            year_month_day{year{j}, January, day{12}},
+            i == j, i < j )));
+}