1 files changed, 69 insertions, 0 deletions
diff --git a/libcxx/test/std/utilities/time/time.cal/time.cal.ym/time.cal.ym.nonmembers/comparisons.pass.cpp b/libcxx/test/std/utilities/time/time.cal/time.cal.ym/time.cal.ym.nonmembers/comparisons.pass.cpp
new file mode 100644
index 00000000000..9761078b24c
--- /dev/null
+++ b/libcxx/test/std/utilities/time/time.cal/time.cal.ym/time.cal.ym.nonmembers/comparisons.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, c++17
+
+// <chrono>
+// class year_month;
+
+// constexpr bool operator==(const year_month& x, const year_month& y) noexcept;
+//   Returns: x.year() == y.year() && x.month() == y.month().
+//
+// constexpr bool operator< (const year_month& x, const year_month& y) noexcept;
+//   Returns: 
+//      If x.year() < y.year() returns true. 
+//      Otherwise, if x.year() > y.year() returns false. 
+//      Otherwise, returns x.month() < y.month().
+
+#include <chrono>
+#include <type_traits>
+#include <cassert>
+
+#include "test_macros.h"
+#include "test_comparisons.h"
+
+int main()
+{
+    using year       = std::chrono::year;
+    using month      = std::chrono::month;
+    using year_month = std::chrono::year_month;
+
+    AssertComparisons6AreNoexcept<year_month>();
+    AssertComparisons6ReturnBool<year_month>();
+    
+    static_assert( testComparisons6(
+        year_month{year{1234}, std::chrono::January}, 
+        year_month{year{1234}, std::chrono::January},
+        true, false), "");
+    
+    static_assert( testComparisons6(
+        year_month{year{1234}, std::chrono::January}, 
+        year_month{year{1234}, std::chrono::February},
+        false, true), "");
+
+    static_assert( testComparisons6(
+        year_month{year{1234}, std::chrono::January}, 
+        year_month{year{1235}, std::chrono::January},
+        false, true), "");
+
+//  same year, different months
+    for (unsigned i = 1; i < 12; ++i)
+        for (unsigned j = 1; j < 12; ++j)
+            assert((testComparisons6(
+                year_month{year{1234}, month{i}}, 
+                year_month{year{1234}, month{j}}, 
+                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{year{i}, std::chrono::January}, 
+            year_month{year{j}, std::chrono::January},
+            i == j, i < j )));
+}