| //===-- Unittests for readlink --------------------------------------------===// |
| // |
| // 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 |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #include "src/__support/CPP/string_view.h" |
| #include "src/errno/libc_errno.h" |
| #include "src/unistd/readlink.h" |
| #include "src/unistd/symlink.h" |
| #include "src/unistd/unlink.h" |
| #include "test/UnitTest/ErrnoSetterMatcher.h" |
| #include "test/UnitTest/Test.h" |
| |
| namespace cpp = LIBC_NAMESPACE::cpp; |
| |
| TEST(LlvmLibcReadlinkTest, CreateAndUnlink) { |
| using LIBC_NAMESPACE::testing::ErrnoSetterMatcher::Succeeds; |
| constexpr const char *FILENAME = "readlink_test_value"; |
| auto LINK_VAL = libc_make_test_file_path(FILENAME); |
| constexpr const char *FILENAME2 = "readlink.test.link"; |
| auto LINK = libc_make_test_file_path(FILENAME2); |
| LIBC_NAMESPACE::libc_errno = 0; |
| |
| // The test strategy is as follows: |
| // 1. Create a symlink with value LINK_VAL. |
| // 2. Read the symlink with readlink. The link value read should be LINK_VAL |
| // 3. Cleanup the symlink created in step #1. |
| ASSERT_THAT(LIBC_NAMESPACE::symlink(LINK_VAL, LINK), Succeeds(0)); |
| |
| char buf[sizeof(LINK_VAL)]; |
| ssize_t len = LIBC_NAMESPACE::readlink(LINK, buf, sizeof(buf)); |
| ASSERT_ERRNO_SUCCESS(); |
| ASSERT_EQ(cpp::string_view(buf, len), cpp::string_view(LINK_VAL)); |
| |
| ASSERT_THAT(LIBC_NAMESPACE::unlink(LINK), Succeeds(0)); |
| } |
| |
| TEST(LlvmLibcReadlinkTest, ReadlinkInNonExistentPath) { |
| using LIBC_NAMESPACE::testing::ErrnoSetterMatcher::Fails; |
| char buf[8]; |
| ASSERT_THAT(LIBC_NAMESPACE::readlink("non-existent-link", buf, sizeof(buf)), |
| Fails(ENOENT)); |
| } |