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diff --git a/libstdc++-v3/testsuite/ext/codecvt/wchar_t.cc b/libstdc++-v3/testsuite/ext/codecvt/wchar_t.cc
new file mode 100644
index 00000000..4040f876
--- /dev/null
+++ b/libstdc++-v3/testsuite/ext/codecvt/wchar_t.cc
@@ -0,0 +1,127 @@
+// { dg-require-iconv "UCS-2BE" }
+// { dg-require-iconv "UCS-4BE" }
+
+// 2000-08-23 Benjamin Kosnik <bkoz@cygnus.com>
+
+// Copyright (C) 2000, 2001, 2002, 2003, 2007, 2009 Free Software Foundation
+//
+// 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/>.
+
+// 22.2.1.5 - Template class codecvt [lib.locale.codecvt]
+
+#include <locale>
+#include <testsuite_hooks.h>
+#include <ext/codecvt_specializations.h>
+
+// Partial specialization using encoding_state.
+// codecvt<unicode_t, wchar_t, encoding_state>
+void test01()
+{
+  using namespace std;
+  typedef codecvt_base::result			result;
+  typedef unsigned short       			int_type;
+  typedef wchar_t				ext_type;
+  typedef __gnu_cxx::encoding_state	       		state_type;
+  typedef codecvt<int_type, ext_type, state_type>	unicode_codecvt;
+  typedef char_traits<int_type>			int_traits;
+  typedef char_traits<ext_type>			ext_traits;
+
+  bool test __attribute__((unused)) = true;
+  int 			size = 23;
+  char  e_lit_base[96] __attribute__((aligned(__alignof__(ext_type)))) =
+  {
+    0x00, 0x00, 0x00, 0x62, 0x00, 0x00, 0x00, 0x6c, 0x00, 0x00, 0x00, 0x61,
+    0x00, 0x00, 0x00, 0x63, 0x00, 0x00, 0x00, 0x6b, 0x00, 0x00, 0x00, 0x20,
+    0x00, 0x00, 0x00, 0x70, 0x00, 0x00, 0x00, 0x65, 0x00, 0x00, 0x00, 0x61,
+    0x00, 0x00, 0x00, 0x72, 0x00, 0x00, 0x00, 0x6c, 0x00, 0x00, 0x00, 0x20,
+    0x00, 0x00, 0x00, 0x6a, 0x00, 0x00, 0x00, 0x61, 0x00, 0x00, 0x00, 0x73,
+    0x00, 0x00, 0x00, 0x6d, 0x00, 0x00, 0x00, 0x69, 0x00, 0x00, 0x00, 0x6e,
+    0x00, 0x00, 0x00, 0x65, 0x00, 0x00, 0x00, 0x20, 0x00, 0x00, 0x00, 0x74,
+    0x00, 0x00, 0x00, 0x65, 0x00, 0x00, 0x00, 0x61, 0x00, 0x00, 0x00, 0xa0     
+  };
+  const ext_type* 	e_lit = reinterpret_cast<ext_type*>(e_lit_base);
+
+  char  i_lit_base[48] __attribute__((aligned(__alignof__(int_type)))) = 
+  { 
+    0x00, 0x62, 0x00, 0x6c, 0x00, 0x61, 0x00, 0x63, 0x00, 0x6b, 0x00, 0x20,
+    0x00, 0x70, 0x00, 0x65, 0x00, 0x61, 0x00, 0x72, 0x00, 0x6c, 0x00, 0x20,
+    0x00, 0x6a, 0x00, 0x61, 0x00, 0x73, 0x00, 0x6d, 0x00, 0x69, 0x00, 0x6e,
+    0x00, 0x65, 0x00, 0x20, 0x00, 0x74, 0x00, 0x65, 0x00, 0x61, 0x00, 0xa0 
+  };
+  const int_type* 	i_lit = reinterpret_cast<int_type*>(i_lit_base);
+
+  const ext_type*       efrom_next;
+  const int_type*       ifrom_next;
+  ext_type* 		e_arr = new ext_type[size + 1];
+  ext_type*		eto_next;
+  int_type* 		i_arr = new int_type[size + 1];
+  int_type*		ito_next;
+
+  // construct a locale object with the specialized facet.
+  locale 		loc(locale::classic(), new unicode_codecvt);
+  // sanity check the constructed locale has the specialized facet.
+  VERIFY( has_facet<unicode_codecvt>(loc) );
+  const unicode_codecvt& cvt = use_facet<unicode_codecvt>(loc); 
+
+  // in
+  //  unicode_codecvt::state_type state01("UCS-2BE", "UCS-4BE", 0xfeff, 0);
+  unicode_codecvt::state_type state01("UCS-2BE", "UCS-4BE", 0, 0);
+  result r1 = cvt.in(state01, e_lit, e_lit + size, efrom_next, 
+		     i_arr, i_arr + size + 1, ito_next);
+  VERIFY( r1 == codecvt_base::ok );
+  VERIFY( !int_traits::compare(i_arr, i_lit, size) ); 
+  VERIFY( efrom_next == e_lit + size );
+  VERIFY( ito_next == i_arr + size );
+
+  // out
+  unicode_codecvt::state_type state02("UCS-2BE", "UCS-4BE", 0, 0);
+  result r2 = cvt.out(state02, i_lit, i_lit + size, ifrom_next, 
+		       e_arr, e_arr + size, eto_next);   
+  VERIFY( r2 == codecvt_base::ok ); // XXX?
+  VERIFY( !ext_traits::compare(e_arr, e_lit, size) ); 
+  VERIFY( ifrom_next == i_lit + size );
+  VERIFY( eto_next == e_arr + size );
+
+  // unshift
+  ext_traits::copy(e_arr, e_lit, size);
+  unicode_codecvt::state_type state03("UCS-2BE", "UCS-4BE", 0, 0);
+  result r3 = cvt.unshift(state03, e_arr, e_arr + size, eto_next);
+  VERIFY( r3 == codecvt_base::noconv );
+  VERIFY( !ext_traits::compare(e_arr, e_lit, size) ); 
+  VERIFY( eto_next == e_arr );
+
+  int i = cvt.encoding();
+  VERIFY( i == 0 );
+
+  VERIFY( !cvt.always_noconv() );
+
+  unicode_codecvt::state_type state04("UCS-2BE", "UCS-4BE", 0, 0);
+  int j = cvt.length(state03, e_lit, e_lit + size, 5);
+  VERIFY( j == 5 );
+
+  int k = cvt.max_length();
+  VERIFY( k == 1 );
+
+  delete [] e_arr;
+  delete [] i_arr;
+}
+
+int main ()
+{
+  test01();
+  return 0;
+}
+