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//===-- Unittests for wcpncpy --------------------------------------------===//
//
// 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/wchar_t.h"
#include "src/wchar/wcpncpy.h"
#include "test/UnitTest/Test.h"
TEST(LlvmLibcWCPNCpyTest, EmptySrc) {
// Empty src should lead to empty destination.
wchar_t dest[4] = {L'a', L'b', L'c', L'\0'};
const wchar_t *src = L"";
LIBC_NAMESPACE::wcpncpy(dest, src, 3);
ASSERT_TRUE(dest[0] == src[0]);
ASSERT_TRUE(dest[0] == L'\0');
// Rest should also be padded with L'\0'
ASSERT_TRUE(dest[1] == L'\0');
ASSERT_TRUE(dest[2] == L'\0');
}
TEST(LlvmLibcWCPNCpyTest, Untouched) {
wchar_t dest[] = {L'a', L'b'};
const wchar_t src[] = {L'x', L'\0'};
LIBC_NAMESPACE::wcpncpy(dest, src, 0);
ASSERT_TRUE(dest[0] == L'a');
ASSERT_TRUE(dest[1] == L'b');
}
TEST(LlvmLibcWCPNCpyTest, CopyOne) {
wchar_t dest[] = {L'a', L'b'};
const wchar_t src[] = {L'x', L'y'};
wchar_t *res = LIBC_NAMESPACE::wcpncpy(dest, src, 1);
ASSERT_TRUE(dest[0] == L'x');
ASSERT_TRUE(dest[1] == L'b');
ASSERT_EQ(dest + 1, res);
}
TEST(LlvmLibcWCPNCpyTest, CopyNull) {
wchar_t dest[] = {L'a', L'b'};
const wchar_t src[] = {L'\0', L'y'};
wchar_t *res = LIBC_NAMESPACE::wcpncpy(dest, src, 1);
ASSERT_TRUE(dest[0] == L'\0');
ASSERT_TRUE(dest[1] == L'b');
ASSERT_EQ(dest, res);
}
TEST(LlvmLibcWCPNCpyTest, CopyPastSrc) {
wchar_t dest[] = {L'a', L'b'};
const wchar_t src[] = {L'\0', L'y'};
wchar_t *res = LIBC_NAMESPACE::wcpncpy(dest, src, 2);
ASSERT_TRUE(dest[0] == L'\0');
ASSERT_TRUE(dest[1] == L'\0');
ASSERT_EQ(dest, res);
}
TEST(LlvmLibcWCPNCpyTest, CopyTwoNoNull) {
wchar_t dest[] = {L'a', L'b'};
const wchar_t src[] = {L'x', L'y'};
wchar_t *res = LIBC_NAMESPACE::wcpncpy(dest, src, 2);
ASSERT_TRUE(dest[0] == L'x');
ASSERT_TRUE(dest[1] == L'y');
ASSERT_EQ(dest + 2, res);
}
TEST(LlvmLibcWCPNCpyTest, CopyTwoWithNull) {
wchar_t dest[] = {L'a', L'b'};
const wchar_t src[] = {L'x', L'\0'};
wchar_t *res = LIBC_NAMESPACE::wcpncpy(dest, src, 2);
ASSERT_TRUE(dest[0] == L'x');
ASSERT_TRUE(dest[1] == L'\0');
ASSERT_EQ(dest + 1, res);
}
TEST(LlvmLibcWCPNCpyTest, CopyAndFill) {
wchar_t dest[] = {L'a', L'b', L'c'};
wchar_t *res = LIBC_NAMESPACE::wcpncpy(dest, L"x", 3);
ASSERT_TRUE(dest[0] == L'x');
ASSERT_TRUE(dest[1] == L'\0');
ASSERT_TRUE(dest[2] == L'\0');
ASSERT_EQ(dest + 1, res);
}
#if defined(LIBC_ADD_NULL_CHECKS)
TEST(LlvmLibcWCPNCpyTest, NullptrCrash) {
// Passing in a nullptr should crash the program.
EXPECT_DEATH([] { LIBC_NAMESPACE::wcpncpy(nullptr, nullptr, 1); },
WITH_SIGNAL(-1));
}
#endif // LIBC_ADD_NULL_CHECKS
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