--- /dev/null
+// 2004-10-06 Paolo Carlini <pcarlini@suse.de>
+
+// Copyright (C) 2004, 2009 Free Software Foundation, Inc.
+//
+// This file is part of the GNU ISO C++ Library. This library is free
+// software; you can redistribute it and/or modify it under the
+// terms of the GNU General Public License as published by the
+// Free Software Foundation; either version 3, or (at your option)
+// any later version.
+
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License along
+// with this library; see the file COPYING3. If not see
+// <http://www.gnu.org/licenses/>.
+
+// 27.8.1.4 Overridden virtual functions
+
+#include <sstream>
+#include <testsuite_hooks.h>
+
+void test01()
+{
+ using namespace std;
+ bool test __attribute__((unused)) = true;
+
+ const unsigned max_size = 1 << 18;
+
+ static wchar_t ref[max_size];
+ wmemset(ref, L'\0', max_size);
+
+ static wchar_t src[max_size * 2];
+ wmemset(src, L'\1', max_size * 2);
+
+ for (unsigned i = 128; i <= max_size; i *= 2)
+ {
+ wchar_t* dest = new wchar_t[i * 2];
+ wmemset(dest, L'\0', i * 2);
+
+ wstringbuf sbuf;
+ sbuf.pubsetbuf(dest, i);
+
+ sbuf.sputn(src, i * 2);
+ VERIFY( !wmemcmp(dest + i, ref, i) );
+
+ delete[] dest;
+ }
+}
+
+int main()
+{
+ test01();
+ return 0;
+}