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

   1 // { dg-do run { target c++17 } }
   2
   3 // Copyright (C) 2014-2024 Free Software Foundation, Inc.
   4 //
   5 // This file is part of the GNU ISO C++ Library.  This library is free
   6 // software; you can redistribute it and/or modify it under the
   7 // terms of the GNU General Public License as published by the
   8 // Free Software Foundation; either version 3, or (at your option)
   9 // any later version.
  10
  11 // This library is distributed in the hope that it will be useful,
  12 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 // GNU General Public License for more details.
  15
  16 // You should have received a copy of the GNU General Public License along
  17 // with this library; see the file COPYING3.  If not see
  18 // <http://www.gnu.org/licenses/>.
  19
  20 // C++17 30.10.8.4.9 path decomposition [fs.path.decompose]
  21
  22 #include <filesystem>
  23 #include <testsuite_hooks.h>
  24 #include <testsuite_fs.h>
  25
  26 using std::filesystem::path;
  27
  28 void
  29 test01()
  30 {
  31   path p0;
  32   VERIFY( p0.parent_path() == p0 );
  33   path p1 = "foo";
  34   VERIFY( p1.parent_path() == p0 );
  35   path p2 = "foo/bar";
  36   VERIFY( p2.parent_path() == p1 );
  37   path p3 = "/foo/bar";
  38   VERIFY( p3.parent_path() == path("/foo") );
  39   VERIFY( p3.parent_path().parent_path() == path("/") );
  40   VERIFY( p3.parent_path().parent_path().parent_path() == path("/") );
  41   path p4 = "/";
  42   VERIFY( p4.parent_path() == p4 );
  43 }
  44
  45 void
  46 test02()
  47 {
  48   for (const path p : __gnu_test::test_paths)
  49   {
  50     if (p.begin() == p.end())
  51       continue;
  52     if (p.has_relative_path())
  53     {
  54       path pp;
  55       for (auto i = p.begin(), end = --p.end(); i != end; ++i)
  56       {
  57         pp /= *i;
  58       }
  59       VERIFY( p.parent_path() == pp );
  60     }
  61     else
  62       VERIFY( p.parent_path() == p );
  63   }
  64 }
  65
  66 void
  67 test03()
  68 {
  69   const std::string narrow = "there/are/no/wrong/turns/only/unexpected/paths";
  70   const path::string_type s(narrow.begin(), narrow.end());
  71   const auto s1 = s.substr(0, s.length() - 6);    // remove "/paths"
  72   const auto s2 = s1.substr(0, s1.length() - 16); // remove "/only/..."
  73
  74   // PR libstdc++/99805
  75   path p = path::string_type(s);
  76   auto pp = p.parent_path();
  77   VERIFY( pp.native() == s1 );
  78   pp = pp.parent_path().parent_path();
  79   VERIFY( pp.native() == s2 );
  80
  81   path from_lval(s);
  82   pp = from_lval.parent_path();
  83   VERIFY( pp.native() == s1 );
  84   pp = pp.parent_path().parent_path();
  85   VERIFY( pp.native() == s2 );
  86 }
  87
  88 int
  89 main()
  90 {
  91   test01();
  92   test02();
  93   test03();
  94 }