libstdc++-v3/testsuite/27_io/basic_ostream/inserters_character/wchar_t/6.cc

   1 // Copyright (C) 2005-2019 Free Software Foundation, Inc.
   2 //
   3 // This file is part of the GNU ISO C++ Library.  This library is free
   4 // software; you can redistribute it and/or modify it under the
   5 // terms of the GNU General Public License as published by the
   6 // Free Software Foundation; either version 3, or (at your option)
   7 // any later version.
   8
   9 // This library is distributed in the hope that it will be useful,
  10 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 // GNU General Public License for more details.
  13
  14 // You should have received a copy of the GNU General Public License along
  15 // with this library; see the file COPYING3.  If not see
  16 // <http://www.gnu.org/licenses/>.
  17
  18 // 27.6.2.5.4 basic_ostream character inserters
  19
  20 #include <string>
  21 #include <ostream>
  22 #include <sstream>
  23 #include <testsuite_hooks.h>
  24
  25 // ostringstream and positioning, multiple writes
  26 // http://gcc.gnu.org/ml/libstdc++/2000-q1/msg00326.html
  27 void test06()
  28 {
  29   const wchar_t carray01[] = L"mos def & talib kweli are black star";
  30
  31   // normal
  32   std::wostringstream ostr1(L"mos def");
  33   VERIFY( ostr1.str() == L"mos def" );
  34   ostr1 << L" & talib kweli";  // should overwrite first part of buffer
  35   VERIFY( ostr1.str() == L" & talib kweli" );
  36   ostr1 << L" are black star";  // should append to string from above
  37   VERIFY( ostr1.str() != carray01 );
  38   VERIFY( ostr1.str() == L" & talib kweli are black star" );
  39
  40   // appending
  41   std::wostringstream ostr2(L"blackalicious",
  42                             std::ios_base::out | std::ios_base::ate);
  43   VERIFY( ostr2.str() == L"blackalicious" );
  44   ostr2 << L" NIA ";  // should not overwrite first part of buffer
  45   VERIFY( ostr2.str() == L"blackalicious NIA " );
  46   ostr2 << L"4: deception (5:19)";  // should append to full string from above
  47   VERIFY( ostr2.str() == L"blackalicious NIA 4: deception (5:19)" );
  48 }
  49
  50 int main()
  51 {
  52   test06();
  53   return 0;
  54 }