1 files changed, 28 insertions, 0 deletions
diff --git a/libcxx/test/std/strings/char.traits/char.traits.specializations/char.traits.specializations.char32_t/assign2.pass.cpp b/libcxx/test/std/strings/char.traits/char.traits.specializations/char.traits.specializations.char32_t/assign2.pass.cpp
new file mode 100644
index 00000000000..35dcd9602d3
--- /dev/null
+++ b/libcxx/test/std/strings/char.traits/char.traits.specializations/char.traits.specializations.char32_t/assign2.pass.cpp
@@ -0,0 +1,28 @@
+//===----------------------------------------------------------------------===//
+//
+//                     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 void assign(char_type& c1, const char_type& c2);
+
+#include <string>
+#include <cassert>
+
+int main()
+{
+#ifndef _LIBCPP_HAS_NO_UNICODE_CHARS
+#if __cplusplus >= 201103L
+    char32_t c = U'\0';
+    std::char_traits<char32_t>::assign(c, U'a');
+    assert(c == U'a');
+#endif
+#endif  // _LIBCPP_HAS_NO_UNICODE_CHARS
+}