libstdc++-v3/testsuite/21_strings/basic_string/inserters_extractors/wchar_t/4.cc

   1 // 1999-07-01 bkoz
   2
   3 // Copyright (C) 1999, 2000, 2001, 2002, 2003, 2009
   4 // Free Software Foundation, Inc.
   5 //
   6 // This file is part of the GNU ISO C++ Library.  This library is free
   7 // software; you can redistribute it and/or modify it under the
   8 // terms of the GNU General Public License as published by the
   9 // Free Software Foundation; either version 3, or (at your option)
  10 // any later version.
  11
  12 // This library is distributed in the hope that it will be useful,
  13 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 // GNU General Public License for more details.
  16
  17 // You should have received a copy of the GNU General Public License along
  18 // with this library; see the file COPYING3.  If not see
  19 // <http://www.gnu.org/licenses/>.
  20
  21 // 21.3.7.9 inserters and extractors
  22
  23 // NB: This file is predicated on sstreams, istreams, and ostreams
  24 // working, not to mention other major details like char_traits, and
  25 // all of the string class.
  26
  27 #include <string>
  28 #include <sstream>
  29 #include <testsuite_hooks.h>
  30
  31 // testing basic_stringbuf::xsputn via stress testing with large strings
  32 // based on a bug report libstdc++ 9
  33 void test04(std::size_t size)
  34 {
  35   bool test __attribute__((unused)) = true;
  36   std::wstring str(size, L's');
  37   std::size_t expected_size = 2 * (size + 1);
  38   std::wostringstream oss(str);
  39
  40   // sanity checks
  41   VERIFY( str.size() == size );
  42   VERIFY( oss.good() );
  43
  44   // stress test
  45   oss << str << std::endl;
  46   if (!oss.good())
  47     test = false;
  48
  49   oss << str << std::endl;
  50   if (!oss.good())
  51     test = false;
  52
  53   VERIFY( str.size() == size );
  54   VERIFY( oss.good() );
  55   std::wstring str_tmp = oss.str();
  56   VERIFY( str_tmp.size() == expected_size );
  57 }
  58
  59 int main()
  60 {
  61   test04(1); // expected_size == 4
  62   test04(1000); // expected_size == 2002
  63   test04(10000); // expected_size == 20002
  64   return 0;
  65 }