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

   1 // Copyright (C) 2015-2019 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 "-DUSE_FILESYSTEM_TS -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 == end(iter) );
  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 == end(iter) );
  45
  46   // Test non-empty directory.
  47   create_directory(p / "x", 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/"x" );
  53   ++iter;
  54   VERIFY( iter == end(iter) );
  55
  56 #if !(defined(__MINGW32__) || defined(__MINGW64__))
  57   // Test inaccessible directory.
  58   permissions(p, fs::perms::none, ec);
  59   VERIFY( !ec );
  60   iter = fs::directory_iterator(p, ec);
  61   VERIFY( ec );
  62   VERIFY( iter == end(iter) );
  63
  64   // Test inaccessible directory, skipping permission denied.
  65   const auto opts = fs::directory_options::skip_permission_denied;
  66   iter = fs::directory_iterator(p, opts, ec);
  67   VERIFY( !ec );
  68   VERIFY( iter == end(iter) );
  69 #endif
  70
  71   permissions(p, fs::perms::owner_all, ec);
  72   remove_all(p, ec);
  73 }
  74
  75 void
  76 test02()
  77 {
  78   std::error_code ec;
  79   const auto p = __gnu_test::nonexistent_path();
  80   create_directory(p, fs::current_path(), ec);
  81   create_directory(p / "x", ec);
  82   VERIFY( !ec );
  83
  84   // Test post-increment (libstdc++/71005)
  85   auto iter = fs::directory_iterator(p, ec);
  86   VERIFY( !ec );
  87   VERIFY( iter != end(iter) );
  88   const auto entry1 = *iter;
  89   const auto entry2 = *iter++;
  90   VERIFY( entry1 == entry2 );
  91   VERIFY( entry1.path() == p/"x" );
  92   VERIFY( iter == end(iter) );
  93
  94   remove_all(p, ec);
  95 }
  96
  97 void
  98 test03()
  99 {
 100   std::error_code ec;
 101   const auto p = __gnu_test::nonexistent_path();
 102   create_directories(p / "longer_than_small_string_buffer", ec);
 103   VERIFY( !ec );
 104
 105   // Test for no reallocation on each dereference (this is a GNU extension)
 106   auto iter = fs::directory_iterator(p, ec);
 107   const auto* s1 = iter->path().c_str();
 108   const auto* s2 = iter->path().c_str();
 109   VERIFY( s1 == s2 );
 110
 111   remove_all(p, ec);
 112 }
 113
 114 void
 115 test04()
 116 {
 117   const fs::directory_iterator it;
 118   VERIFY( it == fs::directory_iterator() );
 119 }
 120
 121 void
 122 test05()
 123 {
 124   auto p = __gnu_test::nonexistent_path();
 125   create_directory(p);
 126   create_directory(p / "x");
 127   fs::directory_iterator it(p), endit;
 128   VERIFY( begin(it) == it );
 129   static_assert( noexcept(begin(it)), "begin is noexcept" );
 130   VERIFY( end(it) == endit );
 131   static_assert( noexcept(end(it)), "end is noexcept" );
 132 }
 133
 134 int
 135 main()
 136 {
 137   test01();
 138   test02();
 139   test03();
 140   test04();
 141   test05();
 142 }