libstdc++-v3/testsuite/experimental/filesystem/iterators/recursive_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::recursive_directory_iterator iter(p, ec);
  36   VERIFY( ec );
  37   VERIFY( iter != fs::recursive_directory_iterator() );
  38
  39   // Test empty directory.
  40   create_directory(p, fs::current_path(), ec);
  41   VERIFY( !ec );
  42   iter = fs::recursive_directory_iterator(p, ec);
  43   VERIFY( !ec );
  44   VERIFY( iter == fs::recursive_directory_iterator() );
  45
  46   // Test non-empty directory.
  47   create_directories(p / "d1/d2");
  48   VERIFY( !ec );
  49   iter = fs::recursive_directory_iterator(p, ec);
  50   VERIFY( !ec );
  51   VERIFY( iter != fs::recursive_directory_iterator() );
  52   VERIFY( iter->path() == p/"d1" );
  53   ++iter;
  54   VERIFY( iter->path() == p/"d1/d2" );
  55   ++iter;
  56   VERIFY( iter == fs::recursive_directory_iterator() );
  57
  58   // Test inaccessible directory.
  59   permissions(p, fs::perms::none, ec);
  60   VERIFY( !ec );
  61   iter = fs::recursive_directory_iterator(p, ec);
  62   VERIFY( ec );
  63   VERIFY( iter != fs::recursive_directory_iterator() );
  64
  65   // Test inaccessible directory, skipping permission denied.
  66   const auto opts = fs::directory_options::skip_permission_denied;
  67   iter = fs::recursive_directory_iterator(p, opts, ec);
  68   VERIFY( !ec );
  69   VERIFY( iter == fs::recursive_directory_iterator() );
  70
  71   // Test inaccessible sub-directory.
  72   permissions(p, fs::perms::owner_all, ec);
  73   VERIFY( !ec );
  74   permissions(p/"d1/d2", fs::perms::none, ec);
  75   VERIFY( !ec );
  76   iter = fs::recursive_directory_iterator(p, ec);
  77   VERIFY( !ec );
  78   VERIFY( iter != fs::recursive_directory_iterator() );
  79   VERIFY( iter->path() == p/"d1" );
  80   ++iter;              // should recurse into d1
  81   VERIFY( iter->path() == p/"d1/d2" );
  82   iter.increment(ec);  // should fail to recurse into p/d1/d2
  83   VERIFY( ec );
  84
  85   // Test inaccessible sub-directory, skipping permission denied.
  86   iter = fs::recursive_directory_iterator(p, opts, ec);
  87   VERIFY( !ec );
  88   VERIFY( iter != fs::recursive_directory_iterator() );
  89   VERIFY( iter->path() == p/"d1" );
  90   ++iter;              // should recurse into d1
  91   VERIFY( iter->path() == p/"d1/d2" );
  92   iter.increment(ec);  // should fail to recurse into p/d1/d2, so skip it
  93   VERIFY( !ec );
  94   VERIFY( iter == fs::recursive_directory_iterator() );
  95
  96   permissions(p/"d1/d2", fs::perms::owner_all, ec);
  97   remove_all(p, ec);
  98 }
  99
 100 void
 101 test02()
 102 {
 103   std::error_code ec;
 104   const auto p = __gnu_test::nonexistent_path();
 105   create_directories(p / "d1/d2", ec);
 106   VERIFY( !ec );
 107
 108   // Test post-increment (libstdc++/71005)
 109   auto iter = fs::recursive_directory_iterator(p, ec);
 110   VERIFY( !ec );
 111   VERIFY( iter != fs::recursive_directory_iterator() );
 112   const auto entry1 = *iter;
 113   const auto entry2 = *iter++;
 114   VERIFY( entry1 == entry2 );
 115   VERIFY( entry1.path() == p/"d1" );
 116   const auto entry3 = *iter;
 117   const auto entry4 = *iter++;
 118   VERIFY( entry3 == entry4 );
 119   VERIFY( entry3.path() == p/"d1/d2" );
 120   VERIFY( iter == fs::recursive_directory_iterator() );
 121
 122   remove_all(p, ec);
 123 }
 124
 125 void
 126 test03()
 127 {
 128   std::error_code ec;
 129   const auto p = __gnu_test::nonexistent_path();
 130   create_directories(p / "longer_than_small_string_buffer", ec);
 131   VERIFY( !ec );
 132
 133   // Test for no reallocation on each dereference (this is a GNU extension)
 134   auto iter = fs::recursive_directory_iterator(p, ec);
 135   const auto* s1 = iter->path().c_str();
 136   const auto* s2 = iter->path().c_str();
 137   VERIFY( s1 == s2 );
 138
 139   remove_all(p, ec);
 140 }
 141
 142 void
 143 test04()
 144 {
 145   // libstdc++/71004
 146   const fs::recursive_directory_iterator it;
 147   VERIFY( it == fs::recursive_directory_iterator() );
 148 }
 149
 150 void
 151 test05()
 152 {
 153   auto p = __gnu_test::nonexistent_path();
 154   create_directory(p);
 155   create_directory_symlink(p, p / "l");
 156   fs::recursive_directory_iterator it(p), endit;
 157   VERIFY( begin(it) == it );
 158   static_assert( noexcept(begin(it)), "begin is noexcept" );
 159   VERIFY( end(it) == endit );
 160   static_assert( noexcept(end(it)), "end is noexcept" );
 161 }
 162
 163 int
 164 main()
 165 {
 166   test01();
 167   test02();
 168   test03();
 169   test04();
 170   test05();
 171 }