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-exception 6 // 7 //===----------------------------------------------------------------------===// 8 9 #include "src/fcntl/open.h" 10 #include "src/unistd/close.h" 11 #include "src/unistd/fsync.h" 12 #include "src/unistd/read.h" 13 #include "src/unistd/write.h" 14 #include "test/ErrnoSetterMatcher.h" 15 #include "utils/UnitTest/Test.h" 16 #include "utils/testutils/FDReader.h" 17 18 #include <errno.h> 19 20 TEST(LlvmLibcUniStd, WriteAndReadBackTest) { 21 using __llvm_libc::testing::ErrnoSetterMatcher::Succeeds; 22 constexpr const char *TEST_FILE = "__unistd_read_write.test"; 23 int write_fd = __llvm_libc::open(TEST_FILE, O_WRONLY | O_CREAT, S_IRWXU); 24 ASSERT_EQ(errno, 0); 25 ASSERT_GT(write_fd, 0); 26 constexpr const char HELLO[] = "hello"; 27 constexpr int HELLO_SIZE = sizeof(HELLO); 28 ASSERT_THAT(__llvm_libc::write(write_fd, HELLO, HELLO_SIZE), 29 Succeeds(HELLO_SIZE)); 30 ASSERT_THAT(__llvm_libc::fsync(write_fd), Succeeds(0)); 31 ASSERT_THAT(__llvm_libc::close(write_fd), Succeeds(0)); 32 33 int read_fd = __llvm_libc::open(TEST_FILE, O_RDONLY); 34 ASSERT_EQ(errno, 0); 35 ASSERT_GT(read_fd, 0); 36 char read_buf[10]; 37 ASSERT_THAT(__llvm_libc::read(read_fd, read_buf, HELLO_SIZE), 38 Succeeds(HELLO_SIZE)); 39 EXPECT_STREQ(read_buf, HELLO); 40 ASSERT_THAT(__llvm_libc::close(read_fd), Succeeds(0)); 41 42 // TODO: 'remove' the test file after the test. 43 } 44 45 TEST(LlvmLibcUniStd, WriteFails) { 46 using __llvm_libc::testing::ErrnoSetterMatcher::Fails; 47 48 EXPECT_THAT(__llvm_libc::write(-1, "", 1), Fails(EBADF)); 49 EXPECT_THAT(__llvm_libc::write(1, reinterpret_cast<const void *>(-1), 1), 50 Fails(EFAULT)); 51 } 52 53 TEST(LlvmLibcUniStd, ReadFails) { 54 using __llvm_libc::testing::ErrnoSetterMatcher::Fails; 55 56 EXPECT_THAT(__llvm_libc::read(-1, nullptr, 1), Fails(EBADF)); 57 EXPECT_THAT(__llvm_libc::read(0, reinterpret_cast<void *>(-1), 1), 58 Fails(EFAULT)); 59 } 60