97 lines · cpp
1//===-- Unittests for strchrnul -------------------------------------------===//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-exception6//7//===----------------------------------------------------------------------===//8 9#include "src/string/strchrnul.h"10#include "test/UnitTest/Test.h"11 12TEST(LlvmLibcStrChrNulTest, FindsFirstCharacter) {13 const char *src = "abcde";14 15 // Should return original string since 'a' is the first character.16 ASSERT_STREQ(LIBC_NAMESPACE::strchrnul(src, 'a'), "abcde");17 // Source string should not change.18 ASSERT_STREQ(src, "abcde");19}20 21TEST(LlvmLibcStrChrNulTest, FindsMiddleCharacter) {22 const char *src = "abcde";23 24 // Should return characters after (and including) 'c'.25 ASSERT_STREQ(LIBC_NAMESPACE::strchrnul(src, 'c'), "cde");26 // Source string should not change.27 ASSERT_STREQ(src, "abcde");28}29 30TEST(LlvmLibcStrChrNulTest, FindsLastCharacterThatIsNotNullTerminator) {31 const char *src = "abcde";32 33 // Should return 'e' and null-terminator.34 ASSERT_STREQ(LIBC_NAMESPACE::strchrnul(src, 'e'), "e");35 // Source string should not change.36 ASSERT_STREQ(src, "abcde");37}38 39TEST(LlvmLibcStrChrNulTest, FindsNullTerminator) {40 const char *src = "abcde";41 42 // Should return null terminator.43 ASSERT_STREQ(LIBC_NAMESPACE::strchrnul(src, '\0'), "");44 // Source string should not change.45 ASSERT_STREQ(src, "abcde");46}47 48TEST(LlvmLibcStrChrNulTest,49 CharacterNotWithinStringShouldReturnNullTerminator) {50 const char *src = "123?";51 52 // Since 'z' is not within the string, should return a pointer to the source53 // string's null terminator.54 char *result = LIBC_NAMESPACE::strchrnul(src, 'z');55 ASSERT_EQ(*result, '\0');56 57 char *term = const_cast<char *>(src) + 4;58 ASSERT_EQ(result, term);59}60 61TEST(LlvmLibcStrChrNulTest, TheSourceShouldNotChange) {62 const char *src = "abcde";63 // When the character is found, the source string should not change.64 LIBC_NAMESPACE::strchrnul(src, 'd');65 ASSERT_STREQ(src, "abcde");66 // Same case for when the character is not found.67 LIBC_NAMESPACE::strchrnul(src, 'z');68 ASSERT_STREQ(src, "abcde");69 // Same case for when looking for null terminator.70 LIBC_NAMESPACE::strchrnul(src, '\0');71 ASSERT_STREQ(src, "abcde");72}73 74TEST(LlvmLibcStrChrNulTest, ShouldFindFirstOfDuplicates) {75 // '1' is duplicated in the string, but it should find the first copy.76 ASSERT_STREQ(LIBC_NAMESPACE::strchrnul("abc1def1ghi", '1'), "1def1ghi");77 78 const char *dups = "XXXXX";79 // Should return original string since 'X' is the first character.80 ASSERT_STREQ(LIBC_NAMESPACE::strchrnul(dups, 'X'), dups);81}82 83TEST(LlvmLibcStrChrNulTest, EmptyStringShouldOnlyMatchNullTerminator) {84 // Null terminator should match.85 ASSERT_STREQ(LIBC_NAMESPACE::strchrnul("", '\0'), "");86 87 // All other characters should not match.88 char *result = LIBC_NAMESPACE::strchrnul("", 'Z');89 ASSERT_EQ(*result, '\0');90 91 result = LIBC_NAMESPACE::strchrnul("", '3');92 ASSERT_EQ(*result, '\0');93 94 result = LIBC_NAMESPACE::strchrnul("", '*');95 ASSERT_EQ(*result, '\0');96}97