libstdc++-v3/testsuite/21_strings/basic_string_view/inserters/wchar_t/3.cc

   1 // { dg-options "-std=gnu++17" }
   2 // { dg-do run { target c++17 } }
   3
   4 // Copyright (C) 2013-2021 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 // inserters
  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_view class.
  26
  27 #include <string_view>
  28 #include <sstream>
  29 #include <iomanip>
  30 #include <testsuite_hooks.h>
  31
  32 void
  33 test09()
  34 {
  35   std::wstring_view foo{L"peace\0\0\0& love"};
  36
  37   std::wostringstream oss1;
  38   oss1 << foo;
  39   VERIFY( oss1.str() == foo );
  40
  41   std::wostringstream oss2;
  42   oss2.width(20);
  43   oss2 << foo;
  44   VERIFY( oss2.str() != foo );
  45   VERIFY( oss2.str().size() == 20 );
  46 }
  47
  48 int
  49 main()
  50 {
  51   test09();
  52
  53   return 0;
  54 }