1//===-- Unittests for wcscat ---------------------------------------------===//
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-exception
6//
7//===----------------------------------------------------------------------===//
8
9#include "hdr/types/wchar_t.h"
10#include "src/wchar/wcscat.h"
11#include "test/UnitTest/Test.h"
12
13TEST(LlvmLibcWCSCatTest, EmptyDest) {
14 // Dest should be fully replaced with src.
15 wchar_t dest[4] = {L'\0'};
16 const wchar_t *src = L"abc";
17 LIBC_NAMESPACE::wcscat(dest, src);
18 ASSERT_TRUE(dest[0] == L'a');
19 ASSERT_TRUE(dest[1] == L'b');
20 ASSERT_TRUE(dest[2] == L'c');
21 ASSERT_TRUE(dest[3] == L'\0');
22}
23
24TEST(LlvmLibcWCSCatTest, NonEmptyDest) {
25 // Src should be appended on to dest.
26 wchar_t dest[7] = {L'x', L'y', L'z', L'\0'};
27 const wchar_t *src = L"abc";
28 LIBC_NAMESPACE::wcscat(dest, src);
29 ASSERT_TRUE(dest[0] == L'x');
30 ASSERT_TRUE(dest[1] == L'y');
31 ASSERT_TRUE(dest[2] == L'z');
32 ASSERT_TRUE(dest[3] == L'a');
33 ASSERT_TRUE(dest[4] == L'b');
34 ASSERT_TRUE(dest[5] == L'c');
35 ASSERT_TRUE(dest[6] == L'\0');
36}
37
38TEST(LlvmLibcWCSCatTest, EmptySrc) {
39 // Dest should remain intact.
40 wchar_t dest[4] = {L'x', L'y', L'z', L'\0'};
41 const wchar_t *src = L"";
42 LIBC_NAMESPACE::wcscat(dest, src);
43 ASSERT_TRUE(dest[0] == L'x');
44 ASSERT_TRUE(dest[1] == L'y');
45 ASSERT_TRUE(dest[2] == L'z');
46 ASSERT_TRUE(dest[3] == L'\0');
47}
48

source code of libc/test/src/wchar/wcscat_test.cpp