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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>
// path read_symlink(const path& p);
// path read_symlink(const path& p, error_code& ec);
#include <filesystem>
#include "test_macros.h"
#include "filesystem_test_helper.h"
namespace fs = std::filesystem;
using namespace fs;
static void test_signatures()
{
const path p; ((void)p);
std::error_code ec; ((void)ec);
ASSERT_SAME_TYPE(decltype(fs::read_symlink(p)), fs::path);
ASSERT_SAME_TYPE(decltype(fs::read_symlink(p, ec)), fs::path);
ASSERT_NOT_NOEXCEPT(fs::read_symlink(p));
// Not noexcept because of narrow contract
ASSERT_NOT_NOEXCEPT(fs::read_symlink(p, ec));
}
static void test_error_reporting()
{
auto checkThrow = [](path const& f, const std::error_code& ec)
{
#ifndef TEST_HAS_NO_EXCEPTIONS
try {
(void)fs::read_symlink(f);
return false;
} catch (filesystem_error const& err) {
return err.path1() == f
&& err.path2() == ""
&& err.code() == ec;
}
#else
((void)f); ((void)ec);
return true;
#endif
};
scoped_test_env env;
const path cases[] = {
env.make_env_path("dne"),
env.create_file("file", 42),
env.create_dir("dir")
};
for (path const& p : cases) {
std::error_code ec;
const path ret = fs::read_symlink(p, ec);
assert(ec);
assert(ret == path{});
assert(checkThrow(p, ec));
}
}
static void basic_symlink_test()
{
scoped_test_env env;
const path dne = env.make_env_path("dne");
const path file = env.create_file("file", 42);
const path dir = env.create_dir("dir");
const path link = env.create_symlink(dne, "link");
const path nested_link = env.make_env_path("nested_link");
create_symlink(link, nested_link);
struct TestCase {
path symlink;
path expected;
} testCases[] = {
{env.create_symlink(dne, "dne_link"), dne},
{env.create_symlink(file, "file_link"), file},
{env.create_directory_symlink(dir, "dir_link"), dir},
{nested_link, link}
};
for (auto& TC : testCases) {
std::error_code ec = std::make_error_code(std::errc::address_in_use);
const path ret = read_symlink(TC.symlink, ec);
assert(!ec);
assert(ret == TC.expected);
}
}
int main(int, char**) {
test_signatures();
test_error_reporting();
basic_symlink_test();
return 0;
}
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