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

   1 // 1999-08-16 bkoz
   2
   3 // Copyright (C) 1999-2019 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 // 27.6.2.5.4 basic_ostream character inserters
  21
  22 #include <string>
  23 #include <ostream>
  24 #include <sstream>
  25 #include <testsuite_hooks.h>
  26
  27 // ostringstream and positioning, multiple writes
  28 // http://gcc.gnu.org/ml/libstdc++/2000-q1/msg00326.html
  29 void test06()
  30 {
  31   const char carray01[] = "mos def & talib kweli are black star";
  32
  33   // normal
  34   std::ostringstream ostr1("mos def");
  35   VERIFY( ostr1.str() == "mos def" );
  36   ostr1 << " & talib kweli";  // should overwrite first part of buffer
  37   VERIFY( ostr1.str() == " & talib kweli" );
  38   ostr1 << " are black star";  // should append to string from above
  39   VERIFY( ostr1.str() != carray01 );
  40   VERIFY( ostr1.str() == " & talib kweli are black star" );
  41
  42   // appending
  43   std::ostringstream ostr2("blackalicious",
  44                            std::ios_base::out | std::ios_base::ate);
  45   VERIFY( ostr2.str() == "blackalicious" );
  46   ostr2 << " NIA ";  // should not overwrite first part of buffer
  47   VERIFY( ostr2.str() == "blackalicious NIA " );
  48   ostr2 << "4: deception (5:19)";  // should append to full string from above
  49   VERIFY( ostr2.str() == "blackalicious NIA 4: deception (5:19)" );
  50 }
  51
  52 int main()
  53 {
  54   test06();
  55   return 0;
  56 }