//===-- Unittests for strrchr ---------------------------------------------===// // // 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/strrchr.h" #include "utils/UnitTest/Test.h" TEST(StrRChrTest, FindsFirstCharacter) { const char *src = "abcde"; // Should return original string since 'a' is the first character. ASSERT_STREQ(__llvm_libc::strrchr(src, 'a'), "abcde"); // Source string should not change. ASSERT_STREQ(src, "abcde"); } TEST(StrRChrTest, FindsMiddleCharacter) { const char *src = "abcde"; // Should return characters after (and including) 'c'. ASSERT_STREQ(__llvm_libc::strrchr(src, 'c'), "cde"); // Source string should not change. ASSERT_STREQ(src, "abcde"); } TEST(StrRChrTest, FindsLastCharacterThatIsNotNullTerminator) { const char *src = "abcde"; // Should return 'e' and null-terminator. ASSERT_STREQ(__llvm_libc::strrchr(src, 'e'), "e"); // Source string should not change. ASSERT_STREQ(src, "abcde"); } TEST(StrRChrTest, FindsNullTerminator) { const char *src = "abcde"; // Should return null terminator. ASSERT_STREQ(__llvm_libc::strrchr(src, '\0'), ""); // Source string should not change. ASSERT_STREQ(src, "abcde"); } TEST(StrRChrTest, FindsLastBehindFirstNullTerminator) { const char src[6] = {'a', 'a', '\0', 'b', '\0', 'c'}; // 'b' is behind a null terminator, so should not be found. ASSERT_STREQ(__llvm_libc::strrchr(src, 'b'), nullptr); // Same goes for 'c'. ASSERT_STREQ(__llvm_libc::strrchr(src, 'c'), nullptr); // Should find the second of the two a's. ASSERT_STREQ(__llvm_libc::strrchr(src, 'a'), "a"); } TEST(StrRChrTest, CharacterNotWithinStringShouldReturnNullptr) { // Since 'z' is not within the string, should return nullptr. ASSERT_STREQ(__llvm_libc::strrchr("123?", 'z'), nullptr); } TEST(StrRChrTest, ShouldFindLastOfDuplicates) { // '1' is duplicated in the string, but it should find the last copy. ASSERT_STREQ(__llvm_libc::strrchr("abc1def1ghi", '1'), "1ghi"); const char *dups = "XXXXX"; // Should return the last occurrence of 'X'. ASSERT_STREQ(__llvm_libc::strrchr(dups, 'X'), "X"); } TEST(StrRChrTest, EmptyStringShouldOnlyMatchNullTerminator) { // Null terminator should match. ASSERT_STREQ(__llvm_libc::strrchr("", '\0'), ""); // All other characters should not match. ASSERT_STREQ(__llvm_libc::strrchr("", 'A'), nullptr); ASSERT_STREQ(__llvm_libc::strrchr("", '2'), nullptr); ASSERT_STREQ(__llvm_libc::strrchr("", '*'), nullptr); }