libstdc++-v3/testsuite/experimental/filesystem/operations/copy_file.cc

   1 // Copyright (C) 2016-2019 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 // { dg-options "-DUSE_FILESYSTEM_TS -lstdc++fs" }
  19 // { dg-do run { target c++11 } }
  20 // { dg-require-filesystem-ts "" }
  21
  22 // 15.4 Copy [fs.op.copy_file]
  23
  24 #include <experimental/filesystem>
  25 #include <fstream>
  26 #include <testsuite_fs.h>
  27 #include <testsuite_hooks.h>
  28
  29 void
  30 test01()
  31 {
  32   using std::experimental::filesystem::copy_options;
  33   std::error_code ec;
  34
  35   auto from = __gnu_test::nonexistent_path();
  36   auto to = __gnu_test::nonexistent_path();
  37
  38   // test non-existent file
  39   bool b = copy_file(from, to, ec);
  40   VERIFY( !b );
  41   VERIFY( ec );
  42   VERIFY( !exists(to) );
  43
  44   // test empty file
  45   std::ofstream{from.c_str()};
  46   VERIFY( exists(from) );
  47   VERIFY( file_size(from) == 0 );
  48
  49   b = copy_file(from, to);
  50   VERIFY( b );
  51   VERIFY( exists(to) );
  52   VERIFY( file_size(to) == 0 );
  53   remove(to);
  54   VERIFY( !exists(to) );
  55   b = copy_file(from, to, copy_options::none, ec);
  56   VERIFY( b );
  57   VERIFY( !ec );
  58   VERIFY( exists(to) );
  59   VERIFY( file_size(to) == 0 );
  60
  61   std::ofstream{from.c_str()} << "Hello, filesystem!";
  62   VERIFY( file_size(from) != 0 );
  63   remove(to);
  64   VERIFY( !exists(to) );
  65   b = copy_file(from, to);
  66   VERIFY( b );
  67   VERIFY( exists(to) );
  68   VERIFY( file_size(to) == file_size(from) );
  69   remove(to);
  70   VERIFY( !exists(to) );
  71   b = copy_file(from, to);
  72   VERIFY( b );
  73   VERIFY( !ec );
  74   VERIFY( exists(to) );
  75   VERIFY( file_size(to) == file_size(from) );
  76
  77   remove(from);
  78   remove(to);
  79 }
  80
  81 int
  82 main()
  83 {
  84   test01();
  85 }