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
TEST(LlvmLibcPutcTest,WriteToFile)18 TEST(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