libstdc++-v3/testsuite/27_io/filesystem/path/factory/u8path.cc

   1 // Copyright (C) 2019-2024 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-additional-options "-Wno-deprecated-declarations" { target c++20 } }
  20
  21 #include <filesystem>
  22 #include <string_view>
  23 #include <testsuite_hooks.h>
  24
  25 namespace fs = std::filesystem;
  26
  27 void
  28 test01()
  29 {
  30   fs::path p = fs::u8path("");
  31   VERIFY( p.empty() );
  32
  33   p = fs::u8path("filename");
  34   VERIFY( p.u8string() == u8"filename" );
  35
  36   p = fs::u8path("\xf0\x9d\x84\x9e");
  37   VERIFY( p.u8string() == u8"\U0001D11E" );
  38
  39   std::string s1 = "filename2";
  40   p = fs::u8path(s1);
  41   VERIFY( p.u8string() == u8"filename2" );
  42
  43   std::string s2 = "filename3";
  44   p = fs::u8path(s2.begin(), s2.end());
  45   VERIFY( p.u8string() == u8"filename3" );
  46
  47   std::string_view sv1{ s1 };
  48   p = fs::u8path(sv1);
  49   VERIFY( p.u8string() == u8"filename2" );
  50
  51   std::string_view sv2{ s2 };
  52   p = fs::u8path(sv2.begin(), sv2.end());
  53   VERIFY( p.u8string() == u8"filename3" );
  54 }
  55
  56 void
  57 test02()
  58 {
  59   // These calls to u8path are undefined, because they fail to meet the
  60   // requirement that the input is valid UTF-8 data. For Windows u8path
  61   // will fail. For POSIX constructing an invalid path appears to work,
  62   // but will fail when converted to a different encoding.
  63
  64   try {
  65     auto p = fs::u8path("\xf0\x9d"); // incomplete surrogate pair
  66     p.u16string();
  67     VERIFY( false );
  68   } catch(const fs::filesystem_error&) {
  69   }
  70
  71   try {
  72     auto p = fs::u8path("\xf0"); // incomplete multibyte character
  73     p.u16string();
  74     VERIFY( false );
  75   } catch(const fs::filesystem_error&) {
  76   }
  77 }
  78
  79 int
  80 main()
  81 {
  82   test01();
  83   test02();
  84 }