1 //===-- Unittests for strcasecmp ------------------------------------------===// 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 "src/strings/strcasecmp.h" 10 #include "test/UnitTest/Test.h" 11 12 TEST(LlvmLibcStrCaseCmpTest, EmptyStringsShouldReturnZero) { 13 const char *s1 = ""; 14 const char *s2 = ""; 15 int result = LIBC_NAMESPACE::strcasecmp(s1, s2); 16 ASSERT_EQ(result, 0); 17 18 // Verify operands reversed. 19 result = LIBC_NAMESPACE::strcasecmp(s2, s1); 20 ASSERT_EQ(result, 0); 21 } 22 23 TEST(LlvmLibcStrCaseCmpTest, EmptyStringShouldNotEqualNonEmptyString) { 24 const char *empty = ""; 25 const char *s2 = "abc"; 26 int result = LIBC_NAMESPACE::strcasecmp(empty, s2); 27 // This should be '\0' - 'a' = -97 28 ASSERT_LT(result, 0); 29 30 // Similar case if empty string is second argument. 31 const char *s3 = "123"; 32 result = LIBC_NAMESPACE::strcasecmp(s3, empty); 33 // This should be '1' - '\0' = 49 34 ASSERT_GT(result, 0); 35 } 36 37 TEST(LlvmLibcStrCaseCmpTest, Case) { 38 const char *s1 = "aB"; 39 const char *s2 = "ab"; 40 int result = LIBC_NAMESPACE::strcasecmp(s1, s2); 41 ASSERT_EQ(result, 0); 42 43 // Verify operands reversed. 44 result = LIBC_NAMESPACE::strcasecmp(s2, s1); 45 ASSERT_EQ(result, 0); 46 } 47