1 files changed, 56 insertions, 0 deletions
diff --git a/libcxx/test/std/input.output/string.streams/stringstream.cons/stringstream.assign/member_swap.pass.cpp b/libcxx/test/std/input.output/string.streams/stringstream.cons/stringstream.assign/member_swap.pass.cpp
new file mode 100644
index 00000000000..95599dd254e
--- /dev/null
+++ b/libcxx/test/std/input.output/string.streams/stringstream.cons/stringstream.assign/member_swap.pass.cpp
@@ -0,0 +1,56 @@
+//===----------------------------------------------------------------------===//
+//
+//                     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.
+//
+//===----------------------------------------------------------------------===//
+
+// <sstream>
+
+// template <class charT, class traits = char_traits<charT>, class Allocator = allocator<charT> >
+// class basic_stringstream
+
+// void swap(basic_stringstream& rhs);
+
+#include <sstream>
+#include <cassert>
+
+int main()
+{
+    {
+        std::stringstream ss0(" 123 456 ");
+        std::stringstream ss;
+        ss.swap(ss0);
+        assert(ss.rdbuf() != 0);
+        assert(ss.good());
+        assert(ss.str() == " 123 456 ");
+        int i = 0;
+        ss >> i;
+        assert(i == 123);
+        ss >> i;
+        assert(i == 456);
+        ss << i << ' ' << 123;
+        assert(ss.str() == "456 1236 ");
+        ss0 << i << ' ' << 123;
+        assert(ss0.str() == "456 123");
+    }
+    {
+        std::wstringstream ss0(L" 123 456 ");
+        std::wstringstream ss;
+        ss.swap(ss0);
+        assert(ss.rdbuf() != 0);
+        assert(ss.good());
+        assert(ss.str() == L" 123 456 ");
+        int i = 0;
+        ss >> i;
+        assert(i == 123);
+        ss >> i;
+        assert(i == 456);
+        ss << i << ' ' << 123;
+        assert(ss.str() == L"456 1236 ");
+        ss0 << i << ' ' << 123;
+        assert(ss0.str() == L"456 123");
+    }
+}