79 lines · cpp
1//===-- Unittests for wmemcmp ---------------------------------------------===//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 "hdr/types/size_t.h"10#include "hdr/types/wchar_t.h"11#include "src/wchar/wmemcmp.h"12#include "test/UnitTest/Test.h"13 14TEST(LlvmLibcWMemcmpTest, CmpZeroByte) {15 // Comparing zero bytes should result in 0.16 const wchar_t *lhs = L"ab";17 const wchar_t *rhs = L"yz";18 EXPECT_EQ(LIBC_NAMESPACE::wmemcmp(lhs, rhs, 0), 0);19}20 21TEST(LlvmLibcWMemcmpTest, LhsRhsAreTheSame) {22 // Comparing strings of equal value should result in 0.23 const wchar_t *lhs = L"ab";24 const wchar_t *rhs = L"ab";25 EXPECT_EQ(LIBC_NAMESPACE::wmemcmp(lhs, rhs, 2), 0);26}27 28TEST(LlvmLibcWMemcmpTest, LhsBeforeRhsLexically) {29 // z after b, should result in a value less than 0.30 const wchar_t *lhs = L"ab";31 const wchar_t *rhs = L"az";32 EXPECT_LT(LIBC_NAMESPACE::wmemcmp(lhs, rhs, 2), 0);33}34 35TEST(LlvmLibcWMemcmpTest, LhsAfterRhsLexically) {36 // z after b, should result in a value greater than 0.37 const wchar_t *lhs = L"az";38 const wchar_t *rhs = L"ab";39 EXPECT_GT(LIBC_NAMESPACE::wmemcmp(lhs, rhs, 2), 0);40}41 42TEST(LlvmLibcWMemcmpTest, CompareToEmpty) {43 // lhs is nonempty, should result in a value greater than 0.44 const wchar_t *lhs = L"az";45 const wchar_t *rhs = L"";46 EXPECT_GT(LIBC_NAMESPACE::wmemcmp(lhs, rhs, 1), 0);47}48 49TEST(LlvmLibcWMemcmpTest, LhsAfterRhsLexicallyLong) {50 // b after a, should result in a value greater than 0.51 const wchar_t *lhs = L"aaaaaaaaaaaaab";52 const wchar_t *rhs = L"aaaaaaaaaaaaaa";53 EXPECT_GT(LIBC_NAMESPACE::wmemcmp(lhs, rhs, 15), 0);54}55 56TEST(LlvmLibcWMemcmpTest, RhsAfterLhsLexicallyLong) {57 // b after a, should result in a value less than 0.58 const wchar_t *lhs = L"aaaaaaaaaaaaaa";59 const wchar_t *rhs = L"aaaaaaaaaaaaab";60 EXPECT_LT(LIBC_NAMESPACE::wmemcmp(lhs, rhs, 15), 0);61}62 63TEST(LlvmLibcWMemcmpTest, LhsRhsAreTheSameLong) {64 // Comparing strings of equal value should result in 0.65 const wchar_t *lhs = L"aaaaaaaaaaaaaa";66 const wchar_t *rhs = L"aaaaaaaaaaaaaa";67 EXPECT_EQ(LIBC_NAMESPACE::wmemcmp(lhs, rhs, 15), 0);68}69 70#if defined(LIBC_ADD_NULL_CHECKS)71TEST(LlvmLibcWMemcmpTest, NullptrCrash) {72 // Passing in a nullptr should crash the program.73 EXPECT_DEATH([] { LIBC_NAMESPACE::wmemcmp(L"aaaaaaaaaaaaaa", nullptr, 15); },74 WITH_SIGNAL(-1));75 EXPECT_DEATH([] { LIBC_NAMESPACE::wmemcmp(nullptr, L"aaaaaaaaaaaaaa", 15); },76 WITH_SIGNAL(-1));77}78#endif // LIBC_ADD_NULL_CHECKS79