66 lines · cpp
1//===-- Unittests for lseek -----------------------------------------------===//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/lseek.h"12#include "src/unistd/read.h"13#include "test/UnitTest/ErrnoCheckingTest.h"14#include "test/UnitTest/ErrnoSetterMatcher.h"15#include "test/UnitTest/Test.h"16 17#include <unistd.h>18 19using LlvmLibcUniStd = LIBC_NAMESPACE::testing::ErrnoCheckingTest;20 21TEST_F(LlvmLibcUniStd, LseekTest) {22 using LIBC_NAMESPACE::testing::ErrnoSetterMatcher::Succeeds;23 constexpr const char *FILENAME = "testdata/lseek.test";24 auto TEST_FILE = libc_make_test_file_path(FILENAME);25 int fd = LIBC_NAMESPACE::open(TEST_FILE, O_RDONLY);26 ASSERT_ERRNO_SUCCESS();27 ASSERT_GT(fd, 0);28 constexpr const char LSEEK_TEST[] = "lseek test";29 constexpr ssize_t LSEEK_TEST_SIZE = sizeof(LSEEK_TEST) - 1;30 31 char read_buf[20];32 ASSERT_THAT(LIBC_NAMESPACE::read(fd, read_buf, LSEEK_TEST_SIZE),33 Succeeds(LSEEK_TEST_SIZE));34 read_buf[LSEEK_TEST_SIZE] = '\0';35 EXPECT_STREQ(read_buf, LSEEK_TEST);36 37 // Seek to the beginning of the file and re-read.38 ASSERT_THAT(LIBC_NAMESPACE::lseek(fd, 0, SEEK_SET), Succeeds(off_t(0)));39 ASSERT_THAT(LIBC_NAMESPACE::read(fd, read_buf, LSEEK_TEST_SIZE),40 Succeeds(LSEEK_TEST_SIZE));41 read_buf[LSEEK_TEST_SIZE] = '\0';42 EXPECT_STREQ(read_buf, LSEEK_TEST);43 44 // Seek to the beginning of the file from the end and re-read.45 ASSERT_THAT(LIBC_NAMESPACE::lseek(fd, -LSEEK_TEST_SIZE, SEEK_END),46 Succeeds(off_t(0)));47 ASSERT_THAT(LIBC_NAMESPACE::read(fd, read_buf, LSEEK_TEST_SIZE),48 Succeeds(LSEEK_TEST_SIZE));49 read_buf[LSEEK_TEST_SIZE] = '\0';50 EXPECT_STREQ(read_buf, LSEEK_TEST);51 52 ASSERT_THAT(LIBC_NAMESPACE::close(fd), Succeeds(0));53}54 55TEST_F(LlvmLibcUniStd, LseekFailsTest) {56 using LIBC_NAMESPACE::testing::ErrnoSetterMatcher::Fails;57 using LIBC_NAMESPACE::testing::ErrnoSetterMatcher::Succeeds;58 constexpr const char *FILENAME = "testdata/lseek.test";59 auto TEST_FILE = libc_make_test_file_path(FILENAME);60 int fd = LIBC_NAMESPACE::open(TEST_FILE, O_RDONLY);61 ASSERT_ERRNO_SUCCESS();62 ASSERT_GT(fd, 0);63 EXPECT_THAT(LIBC_NAMESPACE::lseek(fd, -1, SEEK_CUR), Fails<off_t>(EINVAL));64 ASSERT_THAT(LIBC_NAMESPACE::close(fd), Succeeds(0));65}66