libstdc++-v3/testsuite/27_io/filesystem/operations/exists.cc

   1 // Copyright (C) 2015-2019 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 "-std=gnu++17 -lstdc++fs" }
  19 // { dg-do run { target c++17 } }
  20 // { dg-require-filesystem-ts "" }
  21
  22 #include <filesystem>
  23 #include <testsuite_hooks.h>
  24 #include <testsuite_fs.h>
  25
  26 using std::filesystem::path;
  27
  28 void
  29 test01()
  30 {
  31   const std::error_code bad_ec = make_error_code(std::errc::invalid_argument);
  32   const path root = __gnu_test::root_path();
  33
  34   VERIFY( exists(root) );
  35   VERIFY( exists(root/".") );
  36   VERIFY( exists(path{"."}) );
  37   VERIFY( exists(path{".."}) );
  38   VERIFY( exists(std::filesystem::current_path()) );
  39
  40   std::error_code ec;
  41   ec = bad_ec;
  42   VERIFY( exists(root, ec) );
  43   VERIFY( !ec );
  44   ec = bad_ec;
  45   VERIFY( exists(root/".", ec) );
  46   VERIFY( !ec );
  47   ec = bad_ec;
  48   VERIFY( exists(path{"."}, ec) );
  49   VERIFY( !ec );
  50   ec = bad_ec;
  51   VERIFY( exists(path{".."}, ec) );
  52   VERIFY( !ec );
  53   ec = bad_ec;
  54   VERIFY( exists(std::filesystem::current_path(), ec) );
  55   VERIFY( !ec );
  56 }
  57
  58 void
  59 test02()
  60 {
  61   path rel = __gnu_test::nonexistent_path();
  62   VERIFY( !exists(rel) );
  63
  64   std::error_code ec = std::make_error_code(std::errc::invalid_argument);
  65   VERIFY( !exists(rel, ec) );
  66   VERIFY( !ec ); // DR 2725
  67 }
  68
  69 void
  70 test03()
  71 {
  72   path abs = absolute(__gnu_test::nonexistent_path());
  73   VERIFY( !exists(abs) );
  74
  75   std::error_code ec = std::make_error_code(std::errc::invalid_argument);
  76   VERIFY( !exists(abs, ec) );
  77   VERIFY( !ec ); // DR 2725
  78 }
  79
  80 void
  81 test04()
  82 {
  83   using std::filesystem::perms;
  84   using std::filesystem::perm_options;
  85   path p = __gnu_test::nonexistent_path();
  86   create_directory(p);
  87   permissions(p, perms::all, perm_options::remove);
  88
  89   auto unr = p / "unreachable";
  90   std::error_code ec;
  91   VERIFY( !exists(unr, ec) );
  92   VERIFY( ec == std::errc::permission_denied );
  93   ec.clear();
  94   try
  95   {
  96     exists(unr);
  97   }
  98   catch(const std::filesystem::filesystem_error& ex)
  99   {
 100     ec = ex.code();
 101     VERIFY( ex.path1() == unr );
 102   }
 103   VERIFY( ec == std::errc::permission_denied );
 104
 105   permissions(p, perms::owner_all);
 106   remove(p);
 107 }
 108
 109 int
 110 main()
 111 {
 112   test01();
 113   test02();
 114   test03();
 115   test04();
 116 }