1//===-- Unittests for fscanf ----------------------------------------------===//
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/__support/CPP/string_view.h"
10
11#ifndef LIBC_COPT_STDIO_USE_SYSTEM_FILE
12#include "src/stdio/fclose.h"
13#include "src/stdio/ferror.h"
14#include "src/stdio/fopen.h"
15#include "src/stdio/fwrite.h"
16#endif // LIBC_COPT_STDIO_USE_SYSTEM_FILE
17
18#include "src/stdio/fscanf.h"
19
20#include "test/UnitTest/Test.h"
21
22namespace scanf_test {
23#ifndef LIBC_COPT_STDIO_USE_SYSTEM_FILE
24using LIBC_NAMESPACE::fclose;
25using LIBC_NAMESPACE::ferror;
26using LIBC_NAMESPACE::fopen;
27using LIBC_NAMESPACE::fwrite;
28#else // defined(LIBC_COPT_STDIO_USE_SYSTEM_FILE)
29using ::fclose;
30using ::ferror;
31using ::fopen;
32using ::fwrite;
33#endif // LIBC_COPT_STDIO_USE_SYSTEM_FILE
34} // namespace scanf_test
35
36TEST(LlvmLibcFScanfTest, WriteToFile) {
37 const char *FILENAME = "fscanf_output.test";
38 auto FILE_PATH = libc_make_test_file_path(FILENAME);
39 ::FILE *file = scanf_test::fopen(FILE_PATH, "w");
40 ASSERT_FALSE(file == nullptr);
41
42 int read;
43
44 constexpr char simple[] = "A simple string with no conversions.\n";
45
46 ASSERT_EQ(sizeof(simple) - 1,
47 scanf_test::fwrite(simple, 1, sizeof(simple) - 1, file));
48
49 constexpr char numbers[] = "1234567890\n";
50
51 ASSERT_EQ(sizeof(numbers) - 1,
52 scanf_test::fwrite(numbers, 1, sizeof(numbers) - 1, file));
53
54 constexpr char numbers_and_more[] = "1234 and more\n";
55
56 ASSERT_EQ(sizeof(numbers_and_more) - 1,
57 scanf_test::fwrite(numbers_and_more, 1,
58 sizeof(numbers_and_more) - 1, file));
59
60 read = LIBC_NAMESPACE::fscanf(file,
61 "Reading from a write-only file should fail.");
62 EXPECT_LT(read, 0);
63
64 ASSERT_EQ(0, scanf_test::fclose(file));
65
66 file = scanf_test::fopen(FILE_PATH, "r");
67 ASSERT_FALSE(file == nullptr);
68
69 char data[50];
70 read = LIBC_NAMESPACE::fscanf(file, "%[A-Za-z .\n]", data);
71 ASSERT_EQ(read, 1);
72 ASSERT_STREQ(simple, data);
73
74 read = LIBC_NAMESPACE::fscanf(file, "%s", data);
75 ASSERT_EQ(read, 1);
76 ASSERT_EQ(LIBC_NAMESPACE::cpp::string_view(numbers, 10),
77 LIBC_NAMESPACE::cpp::string_view(data));
78
79 // The format string starts with a space to handle the fact that the %s leaves
80 // a trailing \n and %c doesn't strip leading whitespace.
81 read = LIBC_NAMESPACE::fscanf(file, " %50c", data);
82 ASSERT_EQ(read, 1);
83 ASSERT_EQ(
84 LIBC_NAMESPACE::cpp::string_view(numbers_and_more),
85 LIBC_NAMESPACE::cpp::string_view(data, sizeof(numbers_and_more) - 1));
86
87 ASSERT_EQ(scanf_test::ferror(file), 0);
88 ASSERT_EQ(scanf_test::fclose(file), 0);
89}
90

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