libstdc++-v3/testsuite/27_io/filesystem/iterators/directory_iterator.cc

   1 // Copyright (C) 2015-2017 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   const std::error_code bad_ec = make_error_code(std::errc::invalid_argument);
  32   std::error_code ec;
  33
  34   // Test non-existent path.
  35   const auto p = __gnu_test::nonexistent_path();
  36   fs::directory_iterator iter(p, ec);
  37   VERIFY( ec );
  38   VERIFY( iter == end(iter) );
  39
  40   // Test empty directory.
  41   create_directory(p, fs::current_path(), ec);
  42   VERIFY( !ec );
  43   ec = bad_ec;
  44   iter = fs::directory_iterator(p, ec);
  45   VERIFY( !ec );
  46   VERIFY( iter == end(iter) );
  47
  48   // Test non-empty directory.
  49   ec = bad_ec;
  50   create_directory_symlink(p, p / "l", ec);
  51   VERIFY( !ec );
  52   ec = bad_ec;
  53   iter = fs::directory_iterator(p, ec);
  54   VERIFY( !ec );
  55   VERIFY( iter != fs::directory_iterator() );
  56   VERIFY( iter->path() == p/"l" );
  57   ++iter;
  58   VERIFY( iter == end(iter) );
  59
  60   // Test inaccessible directory.
  61   ec = bad_ec;
  62   permissions(p, fs::perms::none, ec);
  63   VERIFY( !ec );
  64   iter = fs::directory_iterator(p, ec);
  65   VERIFY( ec );
  66   VERIFY( iter == end(iter) );
  67
  68   // Test inaccessible directory, skipping permission denied.
  69   const auto opts = fs::directory_options::skip_permission_denied;
  70   ec = bad_ec;
  71   iter = fs::directory_iterator(p, opts, ec);
  72   VERIFY( !ec );
  73   VERIFY( iter == end(iter) );
  74
  75   permissions(p, fs::perms::owner_all, ec);
  76   remove_all(p, ec);
  77 }
  78
  79 void
  80 test02()
  81 {
  82   const std::error_code bad_ec = make_error_code(std::errc::invalid_argument);
  83   std::error_code ec;
  84   const auto p = __gnu_test::nonexistent_path();
  85   ec = bad_ec;
  86   create_directory(p, fs::current_path(), ec);
  87   create_directory_symlink(p, p / "l", ec);
  88   VERIFY( !ec );
  89
  90   // Test post-increment (libstdc++/71005)
  91   ec = bad_ec;
  92   auto iter = fs::directory_iterator(p, ec);
  93   VERIFY( !ec );
  94   VERIFY( iter != end(iter) );
  95   const auto entry1 = *iter;
  96   const auto entry2 = *iter++;
  97   VERIFY( entry1 == entry2 );
  98   VERIFY( entry1.path() == p/"l" );
  99   VERIFY( iter == end(iter) );
 100
 101   remove_all(p, ec);
 102 }
 103
 104 void
 105 test03()
 106 {
 107   std::error_code ec = make_error_code(std::errc::invalid_argument);
 108   const auto p = __gnu_test::nonexistent_path();
 109   create_directories(p / "longer_than_small_string_buffer", ec);
 110   VERIFY( !ec );
 111
 112   // Test for no reallocation on each dereference (this is a GNU extension)
 113   auto iter = fs::directory_iterator(p, ec);
 114   const auto* s1 = iter->path().c_str();
 115   const auto* s2 = iter->path().c_str();
 116   VERIFY( s1 == s2 );
 117
 118   remove_all(p, ec);
 119 }
 120
 121 void
 122 test04()
 123 {
 124   const fs::directory_iterator it;
 125   VERIFY( it == fs::directory_iterator() );
 126 }
 127
 128 void
 129 test05()
 130 {
 131   auto p = __gnu_test::nonexistent_path();
 132   create_directory(p);
 133   create_directory_symlink(p, p / "l");
 134   fs::directory_iterator it(p), endit;
 135   VERIFY( begin(it) == it );
 136   static_assert( noexcept(begin(it)), "begin is noexcept" );
 137   VERIFY( end(it) == endit );
 138   static_assert( noexcept(end(it)), "end is noexcept" );
 139 }
 140
 141 int
 142 main()
 143 {
 144   test01();
 145   test02();
 146   test03();
 147   test04();
 148   test05();
 149 }