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//===-- Unittests for wcsrchr ---------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#include "hdr/types/wchar_t.h"
#include "src/wchar/wcsrchr.h"
#include "test/UnitTest/Test.h"
TEST(LlvmLibcWCSRChrTest, FindsFirstCharacter) {
// Should return pointer to original string since 'a' is the first character.
const wchar_t *src = L"abcde";
ASSERT_EQ(LIBC_NAMESPACE::wcsrchr(src, L'a'), src);
}
TEST(LlvmLibcWCSRChrTest, FindsMiddleCharacter) {
// Should return pointer to 'c'.
const wchar_t *src = L"abcde";
ASSERT_EQ(LIBC_NAMESPACE::wcsrchr(src, L'c'), (src + 2));
}
TEST(LlvmLibcWCSRChrTest, FindsLastCharacterThatIsNotNullTerminator) {
// Should return pointer to 'e'.
const wchar_t *src = L"abcde";
ASSERT_EQ(LIBC_NAMESPACE::wcsrchr(src, L'e'), (src + 4));
}
TEST(LlvmLibcWCSRChrTest, FindsNullTerminator) {
// Should return pointer to null terminator.
const wchar_t *src = L"abcde";
ASSERT_EQ(LIBC_NAMESPACE::wcsrchr(src, L'\0'), (src + 5));
}
TEST(LlvmLibcWCSRChrTest, CharacterNotWithinStringShouldReturnNullptr) {
// Since 'z' is not within the string, should return nullptr.
const wchar_t *src = L"abcde";
ASSERT_EQ(LIBC_NAMESPACE::wcsrchr(src, L'z'), nullptr);
}
TEST(LlvmLibcWCSRChrTest, ShouldFindLastOfDuplicates) {
// Should return pointer to the last '1'.
const wchar_t *src = L"abc1def1ghi";
ASSERT_EQ((int)(LIBC_NAMESPACE::wcsrchr(src, L'1') - src), 7);
// Should return pointer to the last 'X'
const wchar_t *dups = L"XXXXX";
ASSERT_EQ(LIBC_NAMESPACE::wcsrchr(dups, L'X'), dups + 4);
}
TEST(LlvmLibcWCSRChrTest, EmptyStringShouldOnlyMatchNullTerminator) {
// Null terminator should match
const wchar_t *src = L"";
ASSERT_EQ(src, LIBC_NAMESPACE::wcsrchr(src, L'\0'));
// All other characters should not match
ASSERT_EQ(LIBC_NAMESPACE::wcsrchr(src, L'Z'), nullptr);
ASSERT_EQ(LIBC_NAMESPACE::wcsrchr(src, L'3'), nullptr);
ASSERT_EQ(LIBC_NAMESPACE::wcsrchr(src, L'*'), nullptr);
}
#if defined(LIBC_ADD_NULL_CHECKS)
TEST(LlvmLibcWCSRChrTest, NullptrCrash) {
// Passing in a nullptr should crash the program.
EXPECT_DEATH([] { LIBC_NAMESPACE::wcsrchr(nullptr, L'a'); }, WITH_SIGNAL(-1));
}
#endif // LIBC_ADD_NULL_CHECKS
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