Move test into test/std subdirectory.

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@224658 91177308-0d34-0410-b5e6-96231b3b80d8

test/std/input.output/string.streams/stringbuf/stringbuf.members/str.pass.cpp

@@ -0,0 +1,34 @@
+//===----------------------------------------------------------------------===//
+//
+//                     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_stringbuf
+
+// void str(const basic_string<charT,traits,Allocator>& s);
+
+#include <sstream>
+#include <cassert>
+
+int main()
+{
+    {
+        std::stringbuf buf("testing");
+        assert(buf.str() == "testing");
+        buf.str("another test");
+        assert(buf.str() == "another test");
+    }
+    {
+        std::wstringbuf buf(L"testing");
+        assert(buf.str() == L"testing");
+        buf.str(L"another test");
+        assert(buf.str() == L"another test");
+    }
+}