libstdc++-v3/testsuite/27_io/filesystem/iterators/pop.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   std::error_code ec;
  32   fs::recursive_directory_iterator dir;
  33   dir.pop(ec);  // This is undefined, but our implementation
  34   VERIFY( ec ); // checks and returns an error.
  35   VERIFY( dir == end(dir) );
  36
  37   std::error_code ec2;
  38   try
  39   {
  40     dir.pop();
  41   }
  42   catch (const fs::filesystem_error& ex)
  43   {
  44     ec2 = ex.code();
  45   }
  46   VERIFY( ec2 == ec );
  47 }
  48
  49 void
  50 test02()
  51 {
  52   const std::error_code bad_ec = make_error_code(std::errc::invalid_argument);
  53   std::error_code ec;
  54   const auto p = __gnu_test::nonexistent_path();
  55   create_directories(p / "d1/d2/d3");
  56   for (int i = 0; i < 3; ++i)
  57   {
  58     fs::recursive_directory_iterator dir(p);
  59     VERIFY( dir != end(dir) );
  60     std::advance(dir, i);
  61     VERIFY( dir != end(dir) );
  62     VERIFY( dir.depth() == i );
  63     ec = bad_ec;
  64     dir.pop(ec);
  65     VERIFY( !ec );
  66     VERIFY( dir == end(dir) );
  67
  68     dir = fs::recursive_directory_iterator(p);
  69     std::advance(dir, i);
  70     VERIFY( dir != end(dir) );
  71     VERIFY( dir.depth() == i );
  72     dir.pop();
  73     VERIFY( dir == end(dir) );
  74   }
  75   remove_all(p, ec);
  76 }
  77
  78 void
  79 test03()
  80 {
  81   const std::error_code bad_ec = make_error_code(std::errc::invalid_argument);
  82   std::error_code ec;
  83   const auto p = __gnu_test::nonexistent_path();
  84   create_directories(p / "d1/d2/d3");
  85   create_directories(p / "d1/d2/e3");
  86   create_directories(p / "d1/e2/d3");
  87   for (int i = 0; i < 3; ++i)
  88   {
  89     fs::recursive_directory_iterator dir(p);
  90     std::advance(dir, i);
  91     VERIFY( dir != end(dir) );
  92     int expected_depth = i;
  93     VERIFY( dir.depth() == expected_depth );
  94     ec = bad_ec;
  95     dir.pop(ec);
  96     VERIFY( !ec );
  97     if (dir != end(dir))
  98       VERIFY( dir.depth() == (expected_depth - 1) );
  99
 100     dir = fs::recursive_directory_iterator(p);
 101     std::advance(dir, i);
 102     VERIFY( dir != end(dir) );
 103     VERIFY( dir.depth() == i );
 104     dir.pop();
 105     if (dir != end(dir))
 106       VERIFY( dir.depth() == (i -1) );
 107   }
 108   remove_all(p, ec);
 109 }
 110
 111 int
 112 main()
 113 {
 114   test01();
 115   test02();
 116   test03();
 117 }