1 files changed, 45 insertions, 0 deletions
diff --git a/test/std/strings/char.traits/char.traits.specializations/char.traits.specializations.char32_t/compare.pass.cpp b/test/std/strings/char.traits/char.traits.specializations/char.traits.specializations.char32_t/compare.pass.cpp
new file mode 100644
index 000000000000..25f2099896a6
--- /dev/null
+++ b/test/std/strings/char.traits/char.traits.specializations/char.traits.specializations.char32_t/compare.pass.cpp
@@ -0,0 +1,45 @@
+//===----------------------------------------------------------------------===//
+//
+//                     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.
+//
+//===----------------------------------------------------------------------===//
+
+// <string>
+
+// template<> struct char_traits<char32_t>
+
+// static int compare(const char_type* s1, const char_type* s2, size_t n);
+
+#include <string>
+#include <cassert>
+
+int main()
+{
+#ifndef _LIBCPP_HAS_NO_UNICODE_CHARS
+#if __cplusplus >= 201103L
+    assert(std::char_traits<char32_t>::compare(U"", U"", 0) == 0);
+    assert(std::char_traits<char32_t>::compare(NULL, NULL, 0) == 0);
+
+    assert(std::char_traits<char32_t>::compare(U"1", U"1", 1) == 0);
+    assert(std::char_traits<char32_t>::compare(U"1", U"2", 1) < 0);
+    assert(std::char_traits<char32_t>::compare(U"2", U"1", 1) > 0);
+
+    assert(std::char_traits<char32_t>::compare(U"12", U"12", 2) == 0);
+    assert(std::char_traits<char32_t>::compare(U"12", U"13", 2) < 0);
+    assert(std::char_traits<char32_t>::compare(U"12", U"22", 2) < 0);
+    assert(std::char_traits<char32_t>::compare(U"13", U"12", 2) > 0);
+    assert(std::char_traits<char32_t>::compare(U"22", U"12", 2) > 0);
+
+    assert(std::char_traits<char32_t>::compare(U"123", U"123", 3) == 0);
+    assert(std::char_traits<char32_t>::compare(U"123", U"223", 3) < 0);
+    assert(std::char_traits<char32_t>::compare(U"123", U"133", 3) < 0);
+    assert(std::char_traits<char32_t>::compare(U"123", U"124", 3) < 0);
+    assert(std::char_traits<char32_t>::compare(U"223", U"123", 3) > 0);
+    assert(std::char_traits<char32_t>::compare(U"133", U"123", 3) > 0);
+    assert(std::char_traits<char32_t>::compare(U"124", U"123", 3) > 0);
+#endif
+#endif  // _LIBCPP_HAS_NO_UNICODE_CHARS
+}