1 files changed, 30 insertions, 0 deletions
diff --git a/test/std/strings/char.traits/char.traits.specializations/char.traits.specializations.char32_t/assign3.pass.cpp b/test/std/strings/char.traits/char.traits.specializations/char.traits.specializations.char32_t/assign3.pass.cpp
new file mode 100644
index 0000000000000..0c31ea7ae97e2
--- /dev/null
+++ b/test/std/strings/char.traits/char.traits.specializations/char.traits.specializations.char32_t/assign3.pass.cpp
@@ -0,0 +1,30 @@
+//===----------------------------------------------------------------------===//
+//
+//                     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 char_type* assign(char_type* s, size_t n, char_type a);
+
+#include <string>
+#include <cassert>
+
+int main()
+{
+#ifndef _LIBCPP_HAS_NO_UNICODE_CHARS
+    char32_t s1[] = {1, 2, 3};
+    char32_t s2[3] = {0};
+    assert(std::char_traits<char32_t>::assign(s2, 3, char32_t(5)) == s2);
+    assert(s2[0] == char32_t(5));
+    assert(s2[1] == char32_t(5));
+    assert(s2[2] == char32_t(5));
+    assert(std::char_traits<char32_t>::assign(NULL, 0, char32_t(5)) == NULL);
+#endif  // _LIBCPP_HAS_NO_UNICODE_CHARS
+}