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

   1 // Copyright (C) 2016-2022 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-do run { target c++17 } }
  19 // { dg-require-filesystem-ts "" }
  20
  21 #include <filesystem>
  22 #include <testsuite_hooks.h>
  23 #include <testsuite_fs.h>
  24
  25 namespace fs = std::filesystem;
  26
  27 void
  28 test01()
  29 {
  30   if (!__gnu_test::permissions_are_testable())
  31     return;
  32
  33   auto p = __gnu_test::nonexistent_path();
  34   create_directory(p);
  35   permissions(p, fs::perms::none);
  36   std::error_code ec, ec2;
  37
  38   bool result = fs::is_empty(p, ec);
  39   VERIFY( ec == std::make_error_code(std::errc::permission_denied) );
  40   VERIFY( !result );
  41
  42   try {
  43     fs::is_empty(p);
  44   } catch (const fs::filesystem_error& e) {
  45     ec2 = e.code();
  46   }
  47   VERIFY( ec2 == ec );
  48
  49   result = fs::is_empty(p/"f", ec);
  50   VERIFY( ec == std::make_error_code(std::errc::permission_denied) );
  51   VERIFY( !result );
  52
  53   try {
  54     fs::is_empty(p/"f");
  55   } catch (const fs::filesystem_error& e) {
  56     ec2 = e.code();
  57   }
  58   VERIFY( ec2 == ec );
  59
  60   permissions(p, fs::perms::owner_all, ec);
  61   remove_all(p, ec);
  62 }
  63
  64 void
  65 test02()
  66 {
  67   auto p = __gnu_test::nonexistent_path();
  68   create_directory(p);
  69   std::error_code ec, bad_ec = make_error_code(std::errc::invalid_argument);
  70   bool empty;
  71
  72   ec = bad_ec;
  73   empty = is_empty(p, ec);
  74   VERIFY( !ec );
  75   VERIFY( empty );
  76   empty = is_empty(p);
  77   VERIFY( empty );
  78
  79   __gnu_test::scoped_file f(p/"f");
  80   ec = bad_ec;
  81   empty = is_empty(f.path, ec);
  82   VERIFY( !ec );
  83   VERIFY( empty );
  84   empty = is_empty(f.path);
  85   VERIFY( empty );
  86
  87   std::ofstream{f.path} << "data";
  88   ec = bad_ec;
  89   empty = is_empty(p, ec);
  90   VERIFY( !ec );
  91   VERIFY( !empty );
  92   empty = is_empty(p);
  93   VERIFY( !empty );
  94
  95   ec = bad_ec;
  96   empty = is_empty(p, ec);
  97   VERIFY( !ec );
  98   VERIFY( !empty );
  99   empty = is_empty(p);
 100   VERIFY( !empty );
 101
 102   f.path.clear();
 103   remove_all(p, ec);
 104 }
 105
 106 int
 107 main()
 108 {
 109   test01();
 110   test02();
 111 }