libstdc++-v3/testsuite/27_io/basic_filebuf/snextc/char/1-out.cc

   1 // 2001-05-21 Benjamin Kosnik  <bkoz@redhat.com>
   2
   3 // Copyright (C) 2001-2020 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 // 27.8.1.4 Overridden virtual functions
  21
  22 #include <fstream>
  23 #include <testsuite_hooks.h>
  24 #include <testsuite_io.h>
  25
  26 // @require@ %-*.tst %-*.txt
  27 // @diff@ %-*.tst %*.txt
  28
  29 const char name_01[] = "sgetc.txt"; // file with data in it
  30 const char name_02[] = "tmp_snextc_1out.tst"; // empty file, need to create
  31 const char name_03[] = "tmp_snextc_1io.tst"; // empty file, need to create
  32
  33 void test05()
  34 {
  35   using namespace std;
  36   using namespace __gnu_test;
  37   typedef filebuf::int_type     int_type;
  38   typedef filebuf::traits_type  traits_type;
  39
  40   int_type                      c2;
  41
  42   // int_type snextc()
  43   // calls sbumpc and if sbumpc != eof, return sgetc
  44
  45   // out
  46   {
  47     constraint_filebuf fb_02;
  48     fb_02.open(name_02, ios_base::out | ios_base::trunc);
  49     VERIFY( !fb_02.write_position() );
  50     VERIFY( !fb_02.read_position() );
  51     c2 = fb_02.snextc();
  52     VERIFY( c2 == traits_type::eof() );
  53     c2 = fb_02.snextc();
  54     VERIFY( c2 == traits_type::eof() );
  55     VERIFY( !fb_02.write_position() );
  56     VERIFY( !fb_02.read_position() );
  57   }
  58 }
  59
  60 int main()
  61 {
  62   test05();
  63   return 0;
  64 }