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

   1 // { dg-options "-std=gnu++17 -lstdc++fs" }
   2 // { dg-do run { target c++17 } }
   3 // { dg-require-filesystem-ts "" }
   4
   5 // Copyright (C) 2014-2019 Free Software Foundation, Inc.
   6 //
   7 // This file is part of the GNU ISO C++ Library.  This library is free
   8 // software; you can redistribute it and/or modify it under the
   9 // terms of the GNU General Public License as published by the
  10 // Free Software Foundation; either version 3, or (at your option)
  11 // any later version.
  12
  13 // This library is distributed in the hope that it will be useful,
  14 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16 // GNU General Public License for more details.
  17
  18 // You should have received a copy of the GNU General Public License along
  19 // with this library; see the file COPYING3.  If not see
  20 // <http://www.gnu.org/licenses/>.
  21
  22 // 8.4.9 path decomposition [path.decompose]
  23
  24 #include <filesystem>
  25 #include <testsuite_hooks.h>
  26 #include <testsuite_fs.h>
  27
  28 using std::filesystem::path;
  29
  30 void
  31 test01()
  32 {
  33   path p0;
  34   VERIFY( p0.parent_path() == p0 );
  35   path p1 = "foo";
  36   VERIFY( p1.parent_path() == p0 );
  37   path p2 = "foo/bar";
  38   VERIFY( p2.parent_path() == p1 );
  39   path p3 = "/foo/bar";
  40   VERIFY( p3.parent_path() == path("/foo") );
  41   VERIFY( p3.parent_path().parent_path() == path("/") );
  42   VERIFY( p3.parent_path().parent_path().parent_path() == path("/") );
  43   path p4 = "/";
  44   VERIFY( p4.parent_path() == p4 );
  45 }
  46
  47 void
  48 test02()
  49 {
  50   for (const path& p : __gnu_test::test_paths)
  51   {
  52     if (p.begin() == p.end())
  53       continue;
  54     if (p.has_relative_path())
  55     {
  56       path pp;
  57       for (auto i = p.begin(), end = --p.end(); i != end; ++i)
  58       {
  59         pp /= *i;
  60       }
  61       VERIFY( p.parent_path() == pp );
  62     }
  63     else
  64       VERIFY( p.parent_path() == p );
  65   }
  66 }
  67
  68 int
  69 main()
  70 {
  71   test01();
  72   test02();
  73 }