65 lines · cpp
1//===-- Unittests for read and write --------------------------------------===//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/stdio/remove.h"11#include "src/unistd/close.h"12#include "src/unistd/fsync.h"13#include "src/unistd/read.h"14#include "src/unistd/write.h"15#include "test/UnitTest/ErrnoCheckingTest.h"16#include "test/UnitTest/ErrnoSetterMatcher.h"17#include "test/UnitTest/Test.h"18 19#include <sys/stat.h>20 21using LlvmLibcUniStd = LIBC_NAMESPACE::testing::ErrnoCheckingTest;22 23TEST_F(LlvmLibcUniStd, WriteAndReadBackTest) {24 using LIBC_NAMESPACE::testing::ErrnoSetterMatcher::Succeeds;25 constexpr const char *FILENAME = "__unistd_read_write.test";26 auto TEST_FILE = libc_make_test_file_path(FILENAME);27 28 int write_fd = LIBC_NAMESPACE::open(TEST_FILE, O_WRONLY | O_CREAT, S_IRWXU);29 ASSERT_ERRNO_SUCCESS();30 ASSERT_GT(write_fd, 0);31 constexpr const char HELLO[] = "hello";32 constexpr ssize_t HELLO_SIZE = sizeof(HELLO);33 ASSERT_THAT(LIBC_NAMESPACE::write(write_fd, HELLO, HELLO_SIZE),34 Succeeds(HELLO_SIZE));35 ASSERT_THAT(LIBC_NAMESPACE::fsync(write_fd), Succeeds(0));36 ASSERT_THAT(LIBC_NAMESPACE::close(write_fd), Succeeds(0));37 38 int read_fd = LIBC_NAMESPACE::open(TEST_FILE, O_RDONLY);39 ASSERT_ERRNO_SUCCESS();40 ASSERT_GT(read_fd, 0);41 char read_buf[10];42 ASSERT_THAT(LIBC_NAMESPACE::read(read_fd, read_buf, HELLO_SIZE),43 Succeeds(HELLO_SIZE));44 EXPECT_STREQ(read_buf, HELLO);45 ASSERT_THAT(LIBC_NAMESPACE::close(read_fd), Succeeds(0));46 47 ASSERT_THAT(LIBC_NAMESPACE::remove(TEST_FILE), Succeeds(0));48}49 50TEST_F(LlvmLibcUniStd, WriteFails) {51 using LIBC_NAMESPACE::testing::ErrnoSetterMatcher::Fails;52 53 EXPECT_THAT(LIBC_NAMESPACE::write(-1, "", 1), Fails<ssize_t>(EBADF));54 EXPECT_THAT(LIBC_NAMESPACE::write(1, reinterpret_cast<const void *>(-1), 1),55 Fails<ssize_t>(EFAULT));56}57 58TEST_F(LlvmLibcUniStd, ReadFails) {59 using LIBC_NAMESPACE::testing::ErrnoSetterMatcher::Fails;60 61 EXPECT_THAT(LIBC_NAMESPACE::read(-1, nullptr, 1), Fails<ssize_t>(EBADF));62 EXPECT_THAT(LIBC_NAMESPACE::read(0, reinterpret_cast<void *>(-1), 1),63 Fails<ssize_t>(EFAULT));64}65