53 lines · cpp
1//===-- Unittests for link ------------------------------------------------===//2//3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.4// See https://llvm.org/LICENSE.txt for license information.5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception6//7//===----------------------------------------------------------------------===//8 9#include "src/fcntl/open.h"10#include "src/unistd/close.h"11#include "src/unistd/link.h"12#include "src/unistd/unlink.h"13#include "test/UnitTest/ErrnoCheckingTest.h"14#include "test/UnitTest/ErrnoSetterMatcher.h"15#include "test/UnitTest/Test.h"16 17#include <sys/stat.h>18 19using LlvmLibcLinkTest = LIBC_NAMESPACE::testing::ErrnoCheckingTest;20 21TEST_F(LlvmLibcLinkTest, CreateAndUnlink) {22 using LIBC_NAMESPACE::testing::ErrnoSetterMatcher::Succeeds;23 constexpr const char *FILENAME = "link.test";24 auto TEST_FILE = libc_make_test_file_path(FILENAME);25 constexpr const char *FILENAME2 = "link.test.link";26 auto TEST_FILE_LINK = libc_make_test_file_path(FILENAME2);27 28 // The test strategy is as follows:29 // 1. Create a normal file30 // 2. Create a link to that file.31 // 3. Open the link to check that the link was created.32 // 4. Cleanup the file and its link.33 int write_fd = LIBC_NAMESPACE::open(TEST_FILE, O_WRONLY | O_CREAT, S_IRWXU);34 ASSERT_ERRNO_SUCCESS();35 ASSERT_GT(write_fd, 0);36 ASSERT_THAT(LIBC_NAMESPACE::close(write_fd), Succeeds(0));37 ASSERT_THAT(LIBC_NAMESPACE::link(TEST_FILE, TEST_FILE_LINK), Succeeds(0));38 39 int link_fd = LIBC_NAMESPACE::open(TEST_FILE_LINK, O_PATH);40 ASSERT_GT(link_fd, 0);41 ASSERT_ERRNO_SUCCESS();42 ASSERT_THAT(LIBC_NAMESPACE::close(link_fd), Succeeds(0));43 44 ASSERT_THAT(LIBC_NAMESPACE::unlink(TEST_FILE), Succeeds(0));45 ASSERT_THAT(LIBC_NAMESPACE::unlink(TEST_FILE_LINK), Succeeds(0));46}47 48TEST_F(LlvmLibcLinkTest, LinkToNonExistentFile) {49 using LIBC_NAMESPACE::testing::ErrnoSetterMatcher::Fails;50 ASSERT_THAT(LIBC_NAMESPACE::link("non-existent-file", "bad-link"),51 Fails(ENOENT));52}53