libstdc++-v3/testsuite/21_strings/basic_string/inserters_extractors/char/9.cc

   1 // 1999-07-01 bkoz
   2
   3 // Copyright (C) 1999-2023 Free Software Foundation, Inc.
   4 //
   5 // This file is part of the GNU ISO C++ Library.  This library is free
   6 // software; you can redistribute it and/or modify it under the
   7 // terms of the GNU General Public License as published by the
   8 // Free Software Foundation; either version 3, or (at your option)
   9 // any later version.
  10
  11 // This library is distributed in the hope that it will be useful,
  12 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 // GNU General Public License for more details.
  15
  16 // You should have received a copy of the GNU General Public License along
  17 // with this library; see the file COPYING3.  If not see
  18 // <http://www.gnu.org/licenses/>.
  19
  20 // 21.3.7.9 inserters and extractors
  21
  22 // NB: This file is predicated on sstreams, istreams, and ostreams
  23 // working, not to mention other major details like char_traits, and
  24 // all of the string class.
  25
  26 #include <string>
  27 #include <sstream>
  28 #include <iomanip>
  29 #include <testsuite_hooks.h>
  30
  31 // libstdc++/2830
  32 void test09()
  33 {
  34   std::string blanks( 3, '\0');
  35   std::string foo = "peace";
  36   foo += blanks;
  37   foo += "& love";
  38
  39   std::ostringstream oss1;
  40   oss1 << foo;
  41   VERIFY( oss1.str() == foo );
  42
  43   std::ostringstream oss2;
  44   oss2.width(20);
  45   oss2 << foo;
  46   VERIFY( oss2.str() != foo );
  47   VERIFY( oss2.str().size() == 20 );
  48 }
  49
  50 int main()
  51 {
  52   test09();
  53   return 0;
  54 }