libstdc++-v3/testsuite/experimental/filesystem/iterators/directory_iterator.cc

   1 // Copyright (C) 2015-2016 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 "-lstdc++fs" }
  19 // { dg-do run { target c++11 } }
  20 // { dg-require-filesystem-ts "" }
  21
  22 #include <experimental/filesystem>
  23 #include <testsuite_hooks.h>
  24 #include <testsuite_fs.h>
  25
  26 namespace fs = std::experimental::filesystem;
  27
  28 void
  29 test01()
  30 {
  31   std::error_code ec;
  32
  33   // Test non-existent path.
  34   const auto p = __gnu_test::nonexistent_path();
  35   fs::directory_iterator iter(p, ec);
  36   VERIFY( ec );
  37   VERIFY( iter != fs::directory_iterator() );
  38
  39   // Test empty directory.
  40   create_directory(p, fs::current_path(), ec);
  41   VERIFY( !ec );
  42   iter = fs::directory_iterator(p, ec);
  43   VERIFY( !ec );
  44   VERIFY( iter == fs::directory_iterator() );
  45
  46   // Test non-empty directory.
  47   create_directory_symlink(p, p / "l", ec);
  48   VERIFY( !ec );
  49   iter = fs::directory_iterator(p, ec);
  50   VERIFY( !ec );
  51   VERIFY( iter != fs::directory_iterator() );
  52   VERIFY( iter->path() == p/"l" );
  53   ++iter;
  54   VERIFY( iter == fs::directory_iterator() );
  55
  56   // Test inaccessible directory.
  57   permissions(p, fs::perms::none, ec);
  58   VERIFY( !ec );
  59   iter = fs::directory_iterator(p, ec);
  60   VERIFY( ec );
  61   VERIFY( iter != fs::directory_iterator() );
  62
  63   // Test inaccessible directory, skipping permission denied.
  64   const auto opts = fs::directory_options::skip_permission_denied;
  65   iter = fs::directory_iterator(p, opts, ec);
  66   VERIFY( !ec );
  67   VERIFY( iter == fs::directory_iterator() );
  68
  69   permissions(p, fs::perms::owner_all, ec);
  70   remove_all(p, ec);
  71 }
  72
  73 void
  74 test02()
  75 {
  76   std::error_code ec;
  77   const auto p = __gnu_test::nonexistent_path();
  78   create_directory(p, fs::current_path(), ec);
  79   create_directory_symlink(p, p / "l", ec);
  80   VERIFY( !ec );
  81
  82   // Test post-increment (libstdc++/71005)
  83   auto iter = fs::directory_iterator(p, ec);
  84   VERIFY( !ec );
  85   VERIFY( iter != fs::directory_iterator() );
  86   const auto entry1 = *iter;
  87   const auto entry2 = *iter++;
  88   VERIFY( entry1 == entry2 );
  89   VERIFY( entry1.path() == p/"l" );
  90   VERIFY( iter == fs::directory_iterator() );
  91
  92   remove_all(p, ec);
  93 }
  94
  95 void
  96 test03()
  97 {
  98   std::error_code ec;
  99   const auto p = __gnu_test::nonexistent_path();
 100   create_directories(p / "longer_than_small_string_buffer", ec);
 101   VERIFY( !ec );
 102
 103   // Test for no reallocation on each dereference (this is a GNU extension)
 104   auto iter = fs::directory_iterator(p, ec);
 105   const auto* s1 = iter->path().c_str();
 106   const auto* s2 = iter->path().c_str();
 107   VERIFY( s1 == s2 );
 108
 109   remove_all(p, ec);
 110 }
 111
 112 void
 113 test04()
 114 {
 115   const fs::directory_iterator it;
 116   VERIFY( it == fs::directory_iterator() );
 117 }
 118
 119 void
 120 test05()
 121 {
 122   auto p = __gnu_test::nonexistent_path();
 123   create_directory(p);
 124   create_directory_symlink(p, p / "l");
 125   fs::directory_iterator it(p), endit;
 126   VERIFY( begin(it) == it );
 127   static_assert( noexcept(begin(it)), "begin is noexcept" );
 128   VERIFY( end(it) == endit );
 129   static_assert( noexcept(end(it)), "end is noexcept" );
 130 }
 131
 132 int
 133 main()
 134 {
 135   test01();
 136   test02();
 137   test03();
 138   test04();
 139   test05();
 140 }