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//===----------------------------------------------------------------------===//
//
// 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
//
//===----------------------------------------------------------------------===//
// REQUIRES: can-create-symlinks
// UNSUPPORTED: c++03, c++11, c++14
// UNSUPPORTED: no-filesystem
// UNSUPPORTED: availability-filesystem-missing
// <filesystem>
// bool exists(file_status s) noexcept
// bool exists(path const& p);
// bool exists(path const& p, std::error_code& ec) noexcept;
#include <filesystem>
#include <type_traits>
#include <cassert>
#include "assert_macros.h"
#include "test_macros.h"
#include "filesystem_test_helper.h"
namespace fs = std::filesystem;
using namespace fs;
static void signature_test()
{
file_status s; ((void)s);
const path p; ((void)p);
std::error_code ec; ((void)ec);
ASSERT_NOEXCEPT(exists(s));
ASSERT_NOEXCEPT(exists(p, ec));
ASSERT_NOT_NOEXCEPT(exists(p));
}
static void exists_status_test()
{
struct TestCase {
file_type type;
bool expect;
};
const TestCase testCases[] = {
{file_type::none, false},
{file_type::not_found, false},
{file_type::regular, true},
{file_type::directory, true},
{file_type::symlink, true},
{file_type::block, true},
{file_type::character, true},
{file_type::fifo, true},
{file_type::socket, true},
{file_type::unknown, true}
};
for (auto& TC : testCases) {
file_status s(TC.type);
assert(exists(s) == TC.expect);
}
}
static void test_exist_not_found()
{
static_test_env static_env;
const path p = static_env.DNE;
assert(exists(p) == false);
assert(exists(static_env.Dir) == true);
assert(exists(static_env.Dir / "dne") == false);
// Whether <dir>/dne/.. is considered to exist or not is not necessarily
// something we need to define, but the platform specific behaviour
// does affect a few other tests, so clarify the root cause here.
#ifdef _WIN32
assert(exists(static_env.Dir / "dne" / "..") == true);
#else
assert(exists(static_env.Dir / "dne" / "..") == false);
#endif
std::error_code ec = GetTestEC();
assert(exists(p, ec) == false);
assert(!ec);
}
static void test_exists_fails()
{
#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())
return;
#else
scoped_test_env env;
const path dir = env.create_dir("dir");
const path p = env.create_file("dir/file", 42);
permissions(dir, perms::none);
#endif
std::error_code ec;
assert(exists(p, ec) == false);
assert(ec);
TEST_THROWS_TYPE(filesystem_error, exists(p));
}
#ifndef _WIN32
// Checking for the existence of an invalid long path name doesn't
// trigger errors on windows.
static void test_name_too_long() {
std::string long_name(2500, 'a');
const path file(long_name);
std::error_code ec;
assert(exists(file, ec) == false);
assert(ec);
}
#endif // _WIN32
int main(int, char**) {
signature_test();
exists_status_test();
test_exist_not_found();
test_exists_fails();
#ifndef _WIN32
test_name_too_long();
#endif
return 0;
}
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