1//===-- Unittests for fgetc -----------------------------------------------===//
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/stdio/fclose.h"
10#include "src/stdio/feof.h"
11#include "src/stdio/feof_unlocked.h"
12#include "src/stdio/ferror.h"
13#include "src/stdio/ferror_unlocked.h"
14#include "src/stdio/fgetc_unlocked.h"
15#include "src/stdio/flockfile.h"
16#include "src/stdio/fopen.h"
17#include "src/stdio/funlockfile.h"
18#include "src/stdio/fwrite.h"
19#include "src/stdio/getc_unlocked.h"
20#include "test/UnitTest/ErrnoCheckingTest.h"
21#include "test/UnitTest/ErrnoSetterMatcher.h"
22#include "test/UnitTest/Test.h"
23
24#include "hdr/stdio_macros.h"
25
26using namespace LIBC_NAMESPACE::testing::ErrnoSetterMatcher;
27
28class LlvmLibcGetcTest : public LIBC_NAMESPACE::testing::ErrnoCheckingTest {
29public:
30 using GetcFunc = int(FILE *);
31 void test_with_func(GetcFunc *func, const char *filename) {
32 ::FILE *file = LIBC_NAMESPACE::fopen(filename, "w");
33 ASSERT_FALSE(file == nullptr);
34 constexpr char CONTENT[] = "123456789";
35 constexpr size_t WRITE_SIZE = sizeof(CONTENT) - 1;
36 ASSERT_THAT(LIBC_NAMESPACE::fwrite(CONTENT, 1, WRITE_SIZE, file),
37 Succeeds(WRITE_SIZE));
38 // This is a write-only file so reads should fail.
39 ASSERT_THAT(func(file), Fails(EBADF, EOF));
40 // This is an error and not a real EOF.
41 ASSERT_EQ(LIBC_NAMESPACE::feof(file), 0);
42 ASSERT_NE(LIBC_NAMESPACE::ferror(file), 0);
43
44 ASSERT_THAT(LIBC_NAMESPACE::fclose(file), Succeeds());
45
46 file = LIBC_NAMESPACE::fopen(filename, "r");
47 ASSERT_FALSE(file == nullptr);
48
49 LIBC_NAMESPACE::flockfile(file);
50 for (size_t i = 0; i < WRITE_SIZE; ++i) {
51 ASSERT_THAT(func(file), Succeeds(int('1' + i)));
52 }
53 // Reading more should return EOF but not set error.
54 ASSERT_THAT(func(file), Succeeds(EOF));
55 ASSERT_NE(LIBC_NAMESPACE::feof_unlocked(file), 0);
56 ASSERT_EQ(LIBC_NAMESPACE::ferror_unlocked(file), 0);
57
58 LIBC_NAMESPACE::funlockfile(file);
59 ASSERT_THAT(LIBC_NAMESPACE::fclose(file), Succeeds());
60 }
61};
62
63TEST_F(LlvmLibcGetcTest, WriteAndReadCharactersWithFgetcUnlocked) {
64 test_with_func(&LIBC_NAMESPACE::fgetc_unlocked,
65 "testdata/fgetc_unlocked.test");
66}
67
68TEST_F(LlvmLibcGetcTest, WriteAndReadCharactersWithGetcUnlocked) {
69 test_with_func(&LIBC_NAMESPACE::getc_unlocked, "testdata/getc_unlocked.test");
70}
71

source code of libc/test/src/stdio/fgetc_unlocked_test.cpp