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//===-- Unittests for wcslcpy ---------------------------------------------===//
//
// 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/wcslcpy.h"
#include "test/UnitTest/Test.h"
TEST(LlvmLibcWCSLCpyTest, BiggerSource) {
const wchar_t *src = L"abcde";
wchar_t dst[3];
size_t res = LIBC_NAMESPACE::wcslcpy(dst, src, 3);
ASSERT_TRUE(dst[0] == L'a');
ASSERT_TRUE(dst[1] == L'b');
// Should append null terminator
ASSERT_TRUE(dst[2] == L'\0');
// Should still return length of src
ASSERT_EQ(res, size_t(5));
}
TEST(LlvmLibcWCSLCpyTest, CopyZero) {
const wchar_t *src = L"abcde";
wchar_t dst = L'f';
// Copying zero should not change destination
size_t res = LIBC_NAMESPACE::wcslcpy(&dst, src, 0);
ASSERT_TRUE(dst == L'f');
// Should still return length of src
ASSERT_EQ(res, size_t(5));
}
TEST(LlvmLibcWCSLCpyTest, SmallerSource) {
const wchar_t *src = L"abc";
wchar_t dst[7]{L"123456"};
size_t res = LIBC_NAMESPACE::wcslcpy(dst, src, 7);
ASSERT_TRUE(dst[0] == L'a');
ASSERT_TRUE(dst[1] == L'b');
ASSERT_TRUE(dst[2] == L'c');
// Should append null terminator after copying source
ASSERT_TRUE(dst[3] == L'\0');
// Should not change following characters
ASSERT_TRUE(dst[4] == L'5');
ASSERT_TRUE(dst[5] == L'6');
ASSERT_TRUE(dst[6] == L'\0');
// Should still return length of src
ASSERT_EQ(res, size_t(3));
}
TEST(LlvmLibcWCSLCpyTest, DoesNotCopyAfterNull) {
const wchar_t src[5] = {L'a', L'b', L'\0', L'c', L'd'};
wchar_t dst[5]{L"1234"};
size_t res = LIBC_NAMESPACE::wcslcpy(dst, src, 5);
ASSERT_TRUE(dst[0] == L'a');
ASSERT_TRUE(dst[1] == L'b');
ASSERT_TRUE(dst[2] == L'\0');
// Should not change following characters
ASSERT_TRUE(dst[3] == L'4');
ASSERT_TRUE(dst[4] == L'\0');
// Should still return length of src
ASSERT_EQ(res, size_t(2));
}
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