| //===-- Unittests for strchrnul -------------------------------------------===// |
| // |
| // 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 "src/string/strchrnul.h" |
| #include "test/UnitTest/Test.h" |
| |
| TEST(LlvmLibcStrChrNulTest, FindsFirstCharacter) { |
| const char *src = "abcde"; |
| |
| // Should return original string since 'a' is the first character. |
| ASSERT_STREQ(LIBC_NAMESPACE::strchrnul(src, 'a'), "abcde"); |
| // Source string should not change. |
| ASSERT_STREQ(src, "abcde"); |
| } |
| |
| TEST(LlvmLibcStrChrNulTest, FindsMiddleCharacter) { |
| const char *src = "abcde"; |
| |
| // Should return characters after (and including) 'c'. |
| ASSERT_STREQ(LIBC_NAMESPACE::strchrnul(src, 'c'), "cde"); |
| // Source string should not change. |
| ASSERT_STREQ(src, "abcde"); |
| } |
| |
| TEST(LlvmLibcStrChrNulTest, FindsLastCharacterThatIsNotNullTerminator) { |
| const char *src = "abcde"; |
| |
| // Should return 'e' and null-terminator. |
| ASSERT_STREQ(LIBC_NAMESPACE::strchrnul(src, 'e'), "e"); |
| // Source string should not change. |
| ASSERT_STREQ(src, "abcde"); |
| } |
| |
| TEST(LlvmLibcStrChrNulTest, FindsNullTerminator) { |
| const char *src = "abcde"; |
| |
| // Should return null terminator. |
| ASSERT_STREQ(LIBC_NAMESPACE::strchrnul(src, '\0'), ""); |
| // Source string should not change. |
| ASSERT_STREQ(src, "abcde"); |
| } |
| |
| TEST(LlvmLibcStrChrNulTest, |
| CharacterNotWithinStringShouldReturnNullTerminator) { |
| const char *src = "123?"; |
| |
| // Since 'z' is not within the string, should return a pointer to the source |
| // string's null terminator. |
| char *result = LIBC_NAMESPACE::strchrnul(src, 'z'); |
| ASSERT_EQ(*result, '\0'); |
| |
| char *term = const_cast<char *>(src) + 4; |
| ASSERT_EQ(result, term); |
| } |
| |
| TEST(LlvmLibcStrChrNulTest, TheSourceShouldNotChange) { |
| const char *src = "abcde"; |
| // When the character is found, the source string should not change. |
| LIBC_NAMESPACE::strchrnul(src, 'd'); |
| ASSERT_STREQ(src, "abcde"); |
| // Same case for when the character is not found. |
| LIBC_NAMESPACE::strchrnul(src, 'z'); |
| ASSERT_STREQ(src, "abcde"); |
| // Same case for when looking for null terminator. |
| LIBC_NAMESPACE::strchrnul(src, '\0'); |
| ASSERT_STREQ(src, "abcde"); |
| } |
| |
| TEST(LlvmLibcStrChrNulTest, ShouldFindFirstOfDuplicates) { |
| // '1' is duplicated in the string, but it should find the first copy. |
| ASSERT_STREQ(LIBC_NAMESPACE::strchrnul("abc1def1ghi", '1'), "1def1ghi"); |
| |
| const char *dups = "XXXXX"; |
| // Should return original string since 'X' is the first character. |
| ASSERT_STREQ(LIBC_NAMESPACE::strchrnul(dups, 'X'), dups); |
| } |
| |
| TEST(LlvmLibcStrChrNulTest, EmptyStringShouldOnlyMatchNullTerminator) { |
| // Null terminator should match. |
| ASSERT_STREQ(LIBC_NAMESPACE::strchrnul("", '\0'), ""); |
| |
| // All other characters should not match. |
| char *result = LIBC_NAMESPACE::strchrnul("", 'Z'); |
| ASSERT_EQ(*result, '\0'); |
| |
| result = LIBC_NAMESPACE::strchrnul("", '3'); |
| ASSERT_EQ(*result, '\0'); |
| |
| result = LIBC_NAMESPACE::strchrnul("", '*'); |
| ASSERT_EQ(*result, '\0'); |
| } |