libstdc++-v3/testsuite/27_io/filesystem/operations/relative.cc

   1 // Copyright (C) 2017-2024 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-do run { target c++17 } }
  19 // { dg-require-filesystem-ts "" }
  20
  21 #include <filesystem>
  22 #include <testsuite_fs.h>
  23 #include <testsuite_hooks.h>
  24
  25 void
  26 test01()
  27 {
  28   auto p = __gnu_test::nonexistent_path();
  29   auto q = __gnu_test::nonexistent_path();
  30
  31   auto r = relative(p, q);
  32   VERIFY( r == ".."/p );
  33
  34   r = relative(p, p/q);
  35   VERIFY( r == ".." );
  36
  37   r = relative(p/q, p);
  38   VERIFY( r == q );
  39
  40   const std::error_code bad_ec = make_error_code(std::errc::invalid_argument);
  41   std::error_code ec;
  42
  43   ec = bad_ec;
  44   r = relative(p, q, ec);
  45   VERIFY( !ec );
  46   VERIFY( r == ".."/p );
  47
  48   ec = bad_ec;
  49   r = relative(p, p/q, ec);
  50   VERIFY( !ec );
  51   VERIFY( r == ".." );
  52
  53   ec = bad_ec;
  54   r = relative(p/q, p, ec);
  55   VERIFY( !ec );
  56   VERIFY( r == q );
  57 }
  58
  59 int
  60 main()
  61 {
  62   test01();
  63 }