1//===-- Unittests for wcschr ----------------------------------------------===//
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 "hdr/types/wchar_t.h"
10#include "src/wchar/wcschr.h"
11#include "test/UnitTest/Test.h"
12
13TEST(LlvmLibcWCSChrTest, FindsFirstCharacter) {
14 // Should return pointer to original string since 'a' is the first character.
15 const wchar_t *src = L"abcde";
16 ASSERT_EQ(LIBC_NAMESPACE::wcschr(src, L'a'), src);
17}
18
19TEST(LlvmLibcWCSChrTest, FindsMiddleCharacter) {
20 // Should return pointer to 'c'.
21 const wchar_t *src = L"abcde";
22 ASSERT_EQ(LIBC_NAMESPACE::wcschr(src, L'c'), (src + 2));
23}
24
25TEST(LlvmLibcWCSChrTest, FindsLastCharacterThatIsNotNullTerminator) {
26 // Should return pointer to 'e'.
27 const wchar_t *src = L"abcde";
28 ASSERT_EQ(LIBC_NAMESPACE::wcschr(src, L'e'), (src + 4));
29}
30
31TEST(LlvmLibcWCSChrTest, FindsNullTerminator) {
32 // Should return pointer to null terminator.
33 const wchar_t *src = L"abcde";
34 ASSERT_EQ(LIBC_NAMESPACE::wcschr(src, L'\0'), (src + 5));
35}
36
37TEST(LlvmLibcWCSChrTest, CharacterNotWithinStringShouldReturnNullptr) {
38 // Since 'z' is not within the string, should return nullptr.
39 const wchar_t *src = L"abcde";
40 ASSERT_EQ(LIBC_NAMESPACE::wcschr(src, L'z'), nullptr);
41}
42
43TEST(LlvmLibcWCSChrTest, ShouldFindFirstOfDuplicates) {
44 // Should return pointer to the first '1'.
45 const wchar_t *src = L"abc1def1ghi";
46 ASSERT_EQ((int)(LIBC_NAMESPACE::wcschr(src, L'1') - src), 3);
47
48 // Should return original string since 'X' is the first character.
49 const wchar_t *dups = L"XXXXX";
50 ASSERT_EQ(LIBC_NAMESPACE::wcschr(dups, L'X'), dups);
51}
52
53TEST(LlvmLibcWCSChrTest, EmptyStringShouldOnlyMatchNullTerminator) {
54 // Null terminator should match
55 const wchar_t *src = L"";
56 ASSERT_EQ(src, LIBC_NAMESPACE::wcschr(src, L'\0'));
57 // All other characters should not match
58 ASSERT_EQ(LIBC_NAMESPACE::wcschr(src, L'Z'), nullptr);
59 ASSERT_EQ(LIBC_NAMESPACE::wcschr(src, L'3'), nullptr);
60 ASSERT_EQ(LIBC_NAMESPACE::wcschr(src, L'*'), nullptr);
61}
62

source code of libc/test/src/wchar/wcschr_test.cpp