text: //===----------------------------------------------------------------------===//
  //
  // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
  // See https://llvm.org/LICENSE.txt for license information.
  // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  //
  //===----------------------------------------------------------------------===//
  
  // UNSUPPORTED: c++03
  
  // XFAIL: LIBCXX-AIX-FIXME
  
  // <filesystem>
  
  // bool is_empty(path const& p);
  // bool is_empty(path const& p, std::error_code& ec);
  
  #include "filesystem_include.h"
  #include <type_traits>
  #include <cassert>
  
  #include "test_macros.h"
  #include "rapid-cxx-test.h"
  #include "filesystem_test_helper.h"
  
  using namespace fs;
  
  TEST_SUITE(is_empty_test_suite)
  
  TEST_CASE(signature_test)
  {
      const path p; ((void)p);
      std::error_code ec; ((void)ec);
      ASSERT_NOT_NOEXCEPT(is_empty(p, ec));
      ASSERT_NOT_NOEXCEPT(is_empty(p));
  }
  
  TEST_CASE(test_exist_not_found)
  {
      static_test_env static_env;
      const path p = static_env.DNE;
      std::error_code ec;
      TEST_CHECK(is_empty(p, ec) == false);
      TEST_CHECK(ec);
      TEST_CHECK_THROW(filesystem_error, is_empty(p));
  }
  
  TEST_CASE(test_is_empty_directory)
  {
      static_test_env static_env;
      TEST_CHECK(!is_empty(static_env.Dir));
      TEST_CHECK(!is_empty(static_env.SymlinkToDir));
  }
  
  TEST_CASE(test_is_empty_directory_dynamic)
  {
      scoped_test_env env;
      TEST_CHECK(is_empty(env.test_root));
      env.create_file("foo", 42);
      TEST_CHECK(!is_empty(env.test_root));
  }
  
  TEST_CASE(test_is_empty_file)
  {
      static_test_env static_env;
      TEST_CHECK(is_empty(static_env.EmptyFile));
      TEST_CHECK(!is_empty(static_env.NonEmptyFile));
  }
  
  TEST_CASE(test_is_empty_fails)
  {
      scoped_test_env env;
  #ifdef _WIN32
      // Windows doesn't support setting perms::none to trigger failures
      // reading directories; test using a special inaccessible directory
      // instead.
      const path p = GetWindowsInaccessibleDir();
      if (p.empty())
          TEST_UNSUPPORTED();
  #else
      const path dir = env.create_dir("dir");
      const path p = env.create_dir("dir/dir2");
      permissions(dir, perms::none);
  #endif
  
      std::error_code ec;
      TEST_CHECK(is_empty(p, ec) == false);
      TEST_CHECK(ec);
  
      TEST_CHECK_THROW(filesystem_error, is_empty(p));
  }
  
  TEST_CASE(test_directory_access_denied)
  {
      scoped_test_env env;
  #ifdef _WIN32
      // Windows doesn't support setting perms::none to trigger failures
      // reading directories; test using a special inaccessible directory
      // instead.
      const path dir = GetWindowsInaccessibleDir();
      if (dir.empty())
          TEST_UNSUPPORTED();
  #else
      const path dir = env.create_dir("dir");
      const path file1 = env.create_file("dir/file", 42);
      permissions(dir, perms::none);
  #endif
  
      std::error_code ec = GetTestEC();
      TEST_CHECK(is_empty(dir, ec) == false);
      TEST_CHECK(ec);
      TEST_CHECK(ec != GetTestEC());
  
      TEST_CHECK_THROW(filesystem_error, is_empty(dir));
  }
  
  
  #ifndef _WIN32
  TEST_CASE(test_fifo_fails)
  {
      scoped_test_env env;
      const path fifo = env.create_fifo("fifo");
  
      std::error_code ec = GetTestEC();
      TEST_CHECK(is_empty(fifo, ec) == false);
      TEST_CHECK(ec);
      TEST_CHECK(ec != GetTestEC());
  
      TEST_CHECK_THROW(filesystem_error, is_empty(fifo));
  }
  #endif
  
  TEST_SUITE_END()
  