libstdc++-v3/testsuite/27_io/filesystem/path/decompose/parent_path.cc

   1 // { dg-options "-std=gnu++17" }
   2 // { dg-do run { target c++17 } }
   3
   4 // Copyright (C) 2014-2021 Free Software Foundation, Inc.
   5 //
   6 // This file is part of the GNU ISO C++ Library.  This library is free
   7 // software; you can redistribute it and/or modify it under the
   8 // terms of the GNU General Public License as published by the
   9 // Free Software Foundation; either version 3, or (at your option)
  10 // any later version.
  11
  12 // This library is distributed in the hope that it will be useful,
  13 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 // GNU General Public License for more details.
  16
  17 // You should have received a copy of the GNU General Public License along
  18 // with this library; see the file COPYING3.  If not see
  19 // <http://www.gnu.org/licenses/>.
  20
  21 // 8.4.9 path decomposition [path.decompose]
  22
  23 #include <filesystem>
  24 #include <testsuite_hooks.h>
  25 #include <testsuite_fs.h>
  26
  27 using std::filesystem::path;
  28
  29 void
  30 test01()
  31 {
  32   path p0;
  33   VERIFY( p0.parent_path() == p0 );
  34   path p1 = "foo";
  35   VERIFY( p1.parent_path() == p0 );
  36   path p2 = "foo/bar";
  37   VERIFY( p2.parent_path() == p1 );
  38   path p3 = "/foo/bar";
  39   VERIFY( p3.parent_path() == path("/foo") );
  40   VERIFY( p3.parent_path().parent_path() == path("/") );
  41   VERIFY( p3.parent_path().parent_path().parent_path() == path("/") );
  42   path p4 = "/";
  43   VERIFY( p4.parent_path() == p4 );
  44 }
  45
  46 void
  47 test02()
  48 {
  49   for (const path p : __gnu_test::test_paths)
  50   {
  51     if (p.begin() == p.end())
  52       continue;
  53     if (p.has_relative_path())
  54     {
  55       path pp;
  56       for (auto i = p.begin(), end = --p.end(); i != end; ++i)
  57       {
  58         pp /= *i;
  59       }
  60       VERIFY( p.parent_path() == pp );
  61     }
  62     else
  63       VERIFY( p.parent_path() == p );
  64   }
  65 }
  66
  67 int
  68 main()
  69 {
  70   test01();
  71   test02();
  72 }