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
TEST(LlvmLibcUniStd,WriteAndReadBackTest)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
TEST(LlvmLibcUniStd,WriteFails)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
TEST(LlvmLibcUniStd,ReadFails)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