libstdc++-v3/testsuite/27_io/objects/char/9.cc

   1 // 2003-05-01  Petur Runolfsson  <peturr02@ru.is>
   2
   3 // Copyright (C) 2003-2020 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 // { dg-require-fileio "" }
  21
  22 #include <iostream>
  23 #include <cstdio>
  24 #include <testsuite_hooks.h>
  25
  26 void test09()
  27 {
  28   using namespace std;
  29
  30   const char* name = "tmp_09";
  31
  32   FILE* fout = fopen(name, "w");
  33   fputs("abc\n", fout);
  34   fclose(fout);
  35
  36   VERIFY( freopen(name, "r", stdin) );
  37
  38   // basic_streambuf::showmanyc returns 0.
  39   VERIFY( 0 == std::cin.rdbuf()->in_avail() );
  40 }
  41
  42 int
  43 main()
  44 {
  45   test09();
  46   return 0;
  47 }