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//===-- 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 LINK_VAL[] = "readlink_test_value";
constexpr const char LINK[] = "testdata/readlink.test.link";
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_EQ(libc_errno, 0);
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));
}
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