text: // Copyright (c) 2011-2019 The worldwideweb Core developers
  // Distributed under the MIT software license, see the accompanying
  // file COPYING or http://www.opensource.org/licenses/mit-license.php.
  //
  #include <fs.h>
  #include <test/util/setup_common.h>
  #include <util/system.h>
  #include <util/getuniquepath.h>
  
  #include <boost/test/unit_test.hpp>
  
  BOOST_FIXTURE_TEST_SUITE(fs_tests, BasicTestingSetup)
  
  BOOST_AUTO_TEST_CASE(fsbridge_pathtostring)
  {
      std::string u8_str = "fs_tests_₿_🏃";
      BOOST_CHECK_EQUAL(fs::PathToString(fs::PathFromString(u8_str)), u8_str);
      BOOST_CHECK_EQUAL(fs::u8path(u8_str).u8string(), u8_str);
      BOOST_CHECK_EQUAL(fs::PathFromString(u8_str).u8string(), u8_str);
      BOOST_CHECK_EQUAL(fs::PathToString(fs::u8path(u8_str)), u8_str);
  #ifndef WIN32
      // On non-windows systems, verify that arbitrary byte strings containing
      // invalid UTF-8 can be round tripped successfully with PathToString and
      // PathFromString. On non-windows systems, paths are just byte strings so
      // these functions do not do any encoding. On windows, paths are Unicode,
      // and these functions do encoding and decoding, so the behavior of this
      // test would be undefined.
      std::string invalid_u8_str = "\xf0";
      BOOST_CHECK_EQUAL(invalid_u8_str.size(), 1);
      BOOST_CHECK_EQUAL(fs::PathToString(fs::PathFromString(invalid_u8_str)), invalid_u8_str);
  #endif
  }
  
  BOOST_AUTO_TEST_CASE(fsbridge_stem)
  {
      std::string test_filename = "fs_tests_₿_🏃.dat";
      std::string expected_stem = "fs_tests_₿_🏃";
      BOOST_CHECK_EQUAL(fs::PathToString(fs::PathFromString(test_filename).stem()), expected_stem);
  }
  
  BOOST_AUTO_TEST_CASE(fsbridge_fstream)
  {
      fs::path tmpfolder = m_args.GetDataDirBase();
      // tmpfile1 should be the same as tmpfile2
      fs::path tmpfile1 = tmpfolder / "fs_tests_₿_🏃";
      fs::path tmpfile2 = tmpfolder / "fs_tests_₿_🏃";
      {
          fsbridge::ofstream file(tmpfile1);
          file << "worldwideweb";
      }
      {
          fsbridge::ifstream file(tmpfile2);
          std::string input_buffer;
          file >> input_buffer;
          BOOST_CHECK_EQUAL(input_buffer, "worldwideweb");
      }
      {
          fsbridge::ifstream file(tmpfile1, std::ios_base::in | std::ios_base::ate);
          std::string input_buffer;
          file >> input_buffer;
          BOOST_CHECK_EQUAL(input_buffer, "");
      }
      {
          fsbridge::ofstream file(tmpfile2, std::ios_base::out | std::ios_base::app);
          file << "tests";
      }
      {
          fsbridge::ifstream file(tmpfile1);
          std::string input_buffer;
          file >> input_buffer;
          BOOST_CHECK_EQUAL(input_buffer, "worldwidewebtests");
      }
      {
          fsbridge::ofstream file(tmpfile2, std::ios_base::out | std::ios_base::trunc);
          file << "worldwideweb";
      }
      {
          fsbridge::ifstream file(tmpfile1);
          std::string input_buffer;
          file >> input_buffer;
          BOOST_CHECK_EQUAL(input_buffer, "worldwideweb");
      }
      {
          // Join an absolute path and a relative path.
          fs::path p = fsbridge::AbsPathJoin(tmpfolder, "fs_tests_₿_🏃");
          BOOST_CHECK(p.is_absolute());
          BOOST_CHECK_EQUAL(tmpfile1, p);
      }
      {
          // Join two absolute paths.
          fs::path p = fsbridge::AbsPathJoin(tmpfile1, tmpfile2);
          BOOST_CHECK(p.is_absolute());
          BOOST_CHECK_EQUAL(tmpfile2, p);
      }
      {
          // Ensure joining with empty paths does not add trailing path components.
          BOOST_CHECK_EQUAL(tmpfile1, fsbridge::AbsPathJoin(tmpfile1, ""));
          BOOST_CHECK_EQUAL(tmpfile1, fsbridge::AbsPathJoin(tmpfile1, {}));
      }
      {
          fs::path p1 = GetUniquePath(tmpfolder);
          fs::path p2 = GetUniquePath(tmpfolder);
          fs::path p3 = GetUniquePath(tmpfolder);
  
          // Ensure that the parent path is always the same.
          BOOST_CHECK_EQUAL(tmpfolder, p1.parent_path());
          BOOST_CHECK_EQUAL(tmpfolder, p2.parent_path());
          BOOST_CHECK_EQUAL(tmpfolder, p3.parent_path());
  
          // Ensure that generated paths are actually different.
          BOOST_CHECK(p1 != p2);
          BOOST_CHECK(p2 != p3);
          BOOST_CHECK(p1 != p3);
      }
  }
  
  BOOST_AUTO_TEST_SUITE_END()