55 lines · cpp
1//===-- Unittests for wcsnlen ---------------------------------------------===//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/wcsnlen.h"12#include "test/UnitTest/Test.h"13 14TEST(LlvmLibcWCSNLenTest, EmptyString) {15 ASSERT_EQ(static_cast<size_t>(0), LIBC_NAMESPACE::wcsnlen(L"", 0));16 // If N is greater than string length, this should still return 0.17 ASSERT_EQ(static_cast<size_t>(0), LIBC_NAMESPACE::wcsnlen(L"", 1));18}19 20TEST(LlvmLibcWCSNLenTest, OneCharacterString) {21 const wchar_t *src = L"A";22 ASSERT_EQ(static_cast<size_t>(1), LIBC_NAMESPACE::wcsnlen(src, 1));23 // If N is 0, this should return 0.24 ASSERT_EQ(static_cast<size_t>(0), LIBC_NAMESPACE::wcsnlen(src, 0));25 // If N is greater than string length, this should still return 1.26 ASSERT_EQ(static_cast<size_t>(1), LIBC_NAMESPACE::wcsnlen(src, 3));27}28 29TEST(LlvmLibcWCSNLenTest, ManyCharacterString) {30 const wchar_t *src = L"123456789";31 ASSERT_EQ(static_cast<size_t>(9), LIBC_NAMESPACE::wcsnlen(src, 9));32 // If N is 0, this should return 0.33 ASSERT_EQ(static_cast<size_t>(0), LIBC_NAMESPACE::wcsnlen(src, 0));34 // If N is smaller than the string length, it should return N.35 ASSERT_EQ(static_cast<size_t>(3), LIBC_NAMESPACE::wcsnlen(src, 3));36 // If N is greater than string length, this should still return 9.37 ASSERT_EQ(static_cast<size_t>(9), LIBC_NAMESPACE::wcsnlen(src, 42));38}39 40TEST(LlvmLibcWCSNLenTest, IgnoreCharactersAfterNullTerminator) {41 const wchar_t src[5] = {L'a', L'b', L'c', L'\0', L'd'};42 ASSERT_EQ(static_cast<size_t>(3), LIBC_NAMESPACE::wcsnlen(src, 3));43 // This should only read up to the null terminator.44 ASSERT_EQ(static_cast<size_t>(3), LIBC_NAMESPACE::wcsnlen(src, 4));45 ASSERT_EQ(static_cast<size_t>(3), LIBC_NAMESPACE::wcsnlen(src, 5));46}47 48TEST(LlvmLibcWCSNLenTest, NoNullTerminator) {49 const wchar_t src[4] = {L'a', L'b', L'c', L'd'};50 // Should return 451 ASSERT_EQ(static_cast<size_t>(4), LIBC_NAMESPACE::wcsnlen(src, 4));52 // Should return 2 since N is smaller than string length53 ASSERT_EQ(static_cast<size_t>(2), LIBC_NAMESPACE::wcsnlen(src, 2));54}55