libstdc++-v3/testsuite/27_io/filesystem/operations/is_empty.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 "-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 namespace fs = std::filesystem;
  27
  28 void
  29 test01()
  30 {
  31   auto p = __gnu_test::nonexistent_path();
  32   create_directory(p);
  33   permissions(p, fs::perms::none);
  34   std::error_code ec, ec2;
  35
  36   bool result = fs::is_empty(p, ec);
  37   VERIFY( ec == std::make_error_code(std::errc::permission_denied) );
  38   VERIFY( !result );
  39
  40   try {
  41     fs::is_empty(p);
  42   } catch (const fs::filesystem_error& e) {
  43     ec2 = e.code();
  44   }
  45   VERIFY( ec2 == ec );
  46
  47   result = fs::is_empty(p/"f", ec);
  48   VERIFY( ec == std::make_error_code(std::errc::permission_denied) );
  49   VERIFY( !result );
  50
  51   try {
  52     fs::is_empty(p/"f");
  53   } catch (const fs::filesystem_error& e) {
  54     ec2 = e.code();
  55   }
  56   VERIFY( ec2 == ec );
  57
  58   permissions(p, fs::perms::owner_all, ec);
  59   remove_all(p, ec);
  60 }
  61
  62 void
  63 test02()
  64 {
  65   auto p = __gnu_test::nonexistent_path();
  66   create_directory(p);
  67   std::error_code ec, bad_ec = make_error_code(std::errc::invalid_argument);
  68   bool empty;
  69
  70   ec = bad_ec;
  71   empty = is_empty(p, ec);
  72   VERIFY( !ec );
  73   VERIFY( empty );
  74   empty = is_empty(p);
  75   VERIFY( empty );
  76
  77   __gnu_test::scoped_file f(p/"f");
  78   ec = bad_ec;
  79   empty = is_empty(f.path, ec);
  80   VERIFY( !ec );
  81   VERIFY( empty );
  82   empty = is_empty(f.path);
  83   VERIFY( empty );
  84
  85   std::ofstream{f.path} << "data";
  86   ec = bad_ec;
  87   empty = is_empty(p, ec);
  88   VERIFY( !ec );
  89   VERIFY( !empty );
  90   empty = is_empty(p);
  91   VERIFY( !empty );
  92
  93   ec = bad_ec;
  94   empty = is_empty(p, ec);
  95   VERIFY( !ec );
  96   VERIFY( !empty );
  97   empty = is_empty(p);
  98   VERIFY( !empty );
  99
 100   f.path.clear();
 101   remove_all(p, ec);
 102 }
 103
 104 int
 105 main()
 106 {
 107   test01();
 108   test02();
 109 }