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//===-- Unittests for wmemcmp ---------------------------------------------===//
//
// 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 "hdr/types/size_t.h"
#include "hdr/types/wchar_t.h"
#include "src/wchar/wmemcmp.h"
#include "test/UnitTest/Test.h"
TEST(LlvmLibcWMemcmpTest, CmpZeroByte) {
// Comparing zero bytes should result in 0.
const wchar_t *lhs = L"ab";
const wchar_t *rhs = L"yz";
EXPECT_EQ(LIBC_NAMESPACE::wmemcmp(lhs, rhs, 0), 0);
}
TEST(LlvmLibcWMemcmpTest, LhsRhsAreTheSame) {
// Comparing strings of equal value should result in 0.
const wchar_t *lhs = L"ab";
const wchar_t *rhs = L"ab";
EXPECT_EQ(LIBC_NAMESPACE::wmemcmp(lhs, rhs, 2), 0);
}
TEST(LlvmLibcWMemcmpTest, LhsBeforeRhsLexically) {
// z after b, should result in a value less than 0.
const wchar_t *lhs = L"ab";
const wchar_t *rhs = L"az";
EXPECT_LT(LIBC_NAMESPACE::wmemcmp(lhs, rhs, 2), 0);
}
TEST(LlvmLibcWMemcmpTest, LhsAfterRhsLexically) {
// z after b, should result in a value greater than 0.
const wchar_t *lhs = L"az";
const wchar_t *rhs = L"ab";
EXPECT_GT(LIBC_NAMESPACE::wmemcmp(lhs, rhs, 2), 0);
}
TEST(LlvmLibcWMemcmpTest, CompareToEmpty) {
// lhs is nonempty, should result in a value greater than 0.
const wchar_t *lhs = L"az";
const wchar_t *rhs = L"";
EXPECT_GT(LIBC_NAMESPACE::wmemcmp(lhs, rhs, 1), 0);
}
TEST(LlvmLibcWMemcmpTest, LhsAfterRhsLexicallyLong) {
// b after a, should result in a value greater than 0.
const wchar_t *lhs = L"aaaaaaaaaaaaab";
const wchar_t *rhs = L"aaaaaaaaaaaaaa";
EXPECT_GT(LIBC_NAMESPACE::wmemcmp(lhs, rhs, 15), 0);
}
TEST(LlvmLibcWMemcmpTest, RhsAfterLhsLexicallyLong) {
// b after a, should result in a value less than 0.
const wchar_t *lhs = L"aaaaaaaaaaaaaa";
const wchar_t *rhs = L"aaaaaaaaaaaaab";
EXPECT_LT(LIBC_NAMESPACE::wmemcmp(lhs, rhs, 15), 0);
}
TEST(LlvmLibcWMemcmpTest, LhsRhsAreTheSameLong) {
// Comparing strings of equal value should result in 0.
const wchar_t *lhs = L"aaaaaaaaaaaaaa";
const wchar_t *rhs = L"aaaaaaaaaaaaaa";
EXPECT_EQ(LIBC_NAMESPACE::wmemcmp(lhs, rhs, 15), 0);
}
#if defined(LIBC_ADD_NULL_CHECKS)
TEST(LlvmLibcWMemcmpTest, NullptrCrash) {
// Passing in a nullptr should crash the program.
EXPECT_DEATH([] { LIBC_NAMESPACE::wmemcmp(L"aaaaaaaaaaaaaa", nullptr, 15); },
WITH_SIGNAL(-1));
EXPECT_DEATH([] { LIBC_NAMESPACE::wmemcmp(nullptr, L"aaaaaaaaaaaaaa", 15); },
WITH_SIGNAL(-1));
}
#endif // LIBC_ADD_NULL_CHECKS
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