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//===-- Unittests for wcscmp ----------------------------------------------===//
//
// 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/wchar/wcscmp.h"
#include "test/UnitTest/Test.h"
TEST(LlvmLibcWcscmpTest, EmptyStringsShouldReturnZero) {
const wchar_t *s1 = L"";
const wchar_t *s2 = L"";
int result = LIBC_NAMESPACE::wcscmp(s1, s2);
ASSERT_EQ(result, 0);
// Verify operands reversed.
result = LIBC_NAMESPACE::wcscmp(s2, s1);
ASSERT_EQ(result, 0);
}
TEST(LlvmLibcWcscmpTest, EmptyStringShouldNotEqualNonEmptyString) {
const wchar_t *empty = L"";
const wchar_t *s2 = L"abc";
int result = LIBC_NAMESPACE::wcscmp(empty, s2);
ASSERT_LT(result, 0);
// Similar case if empty string is second argument.
const wchar_t *s3 = L"123";
result = LIBC_NAMESPACE::wcscmp(s3, empty);
ASSERT_GT(result, 0);
}
TEST(LlvmLibcWcscmpTest, EqualStringsShouldReturnZero) {
const wchar_t *s1 = L"abc";
const wchar_t *s2 = L"abc";
int result = LIBC_NAMESPACE::wcscmp(s1, s2);
ASSERT_EQ(result, 0);
// Verify operands reversed.
result = LIBC_NAMESPACE::wcscmp(s2, s1);
ASSERT_EQ(result, 0);
}
TEST(LlvmLibcWcscmpTest, ShouldReturnResultOfFirstDifference) {
const wchar_t *s1 = L"___B42__";
const wchar_t *s2 = L"___C55__";
int result = LIBC_NAMESPACE::wcscmp(s1, s2);
ASSERT_LT(result, 0);
// Verify operands reversed.
result = LIBC_NAMESPACE::wcscmp(s2, s1);
ASSERT_GT(result, 0);
}
TEST(LlvmLibcWcscmpTest, CapitalizedLetterShouldNotBeEqual) {
const wchar_t *s1 = L"abcd";
const wchar_t *s2 = L"abCd";
int result = LIBC_NAMESPACE::wcscmp(s1, s2);
ASSERT_GT(result, 0);
// Verify operands reversed.
result = LIBC_NAMESPACE::wcscmp(s2, s1);
ASSERT_LT(result, 0);
}
TEST(LlvmLibcWcscmpTest, UnequalLengthStringsShouldNotReturnZero) {
const wchar_t *s1 = L"abc";
const wchar_t *s2 = L"abcd";
int result = LIBC_NAMESPACE::wcscmp(s1, s2);
ASSERT_LT(result, 0);
// Verify operands reversed.
result = LIBC_NAMESPACE::wcscmp(s2, s1);
ASSERT_GT(result, 0);
}
TEST(LlvmLibcWcscmpTest, StringArgumentSwapChangesSign) {
const wchar_t *a = L"a";
const wchar_t *b = L"b";
int result = LIBC_NAMESPACE::wcscmp(b, a);
ASSERT_GT(result, 0);
result = LIBC_NAMESPACE::wcscmp(a, b);
ASSERT_LT(result, 0);
}
#if defined(LIBC_ADD_NULL_CHECKS)
TEST(LlvmLibcWcscmpTest, NullptrCrash) {
// Passing in a nullptr should crash the program.
EXPECT_DEATH([] { LIBC_NAMESPACE::wcscmp(L"aaaaaaaaaaaaaa", nullptr); },
WITH_SIGNAL(-1));
EXPECT_DEATH([] { LIBC_NAMESPACE::wcscmp(nullptr, L"aaaaaaaaaaaaaa"); },
WITH_SIGNAL(-1));
}
#endif // LIBC_ADD_NULL_CHECKS
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