1//===-- Unittests for putc ---------------------------------------------===//
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/ferror.h"
11#include "src/stdio/fopen.h"
12#include "src/stdio/fread.h"
13
14#include "src/stdio/putc.h"
15
16#include "test/UnitTest/Test.h"
17
18TEST(LlvmLibcPutcTest, WriteToFile) {
19 constexpr char FILENAME[] = "testdata/putc_output.test";
20 ::FILE *file = LIBC_NAMESPACE::fopen(FILENAME, "w");
21 ASSERT_FALSE(file == nullptr);
22
23 constexpr char simple[] = "simple letters";
24 for (size_t i = 0; i < sizeof(simple); ++i) {
25 ASSERT_EQ(LIBC_NAMESPACE::putc(simple[i], file), 0);
26 }
27
28 ASSERT_EQ(0, LIBC_NAMESPACE::fclose(file));
29
30 file = LIBC_NAMESPACE::fopen(FILENAME, "r");
31 ASSERT_FALSE(file == nullptr);
32 char data[50];
33
34 ASSERT_EQ(LIBC_NAMESPACE::fread(data, 1, sizeof(simple) - 1, file),
35 sizeof(simple) - 1);
36 data[sizeof(simple) - 1] = '\0';
37
38 ASSERT_STREQ(data, simple);
39
40 ASSERT_EQ(LIBC_NAMESPACE::ferror(file), 0);
41 EXPECT_LT(LIBC_NAMESPACE::putc('L', file), 0);
42
43 ASSERT_EQ(LIBC_NAMESPACE::fclose(file), 0);
44}
45

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