1 //===---------------------- Unittests for strcat --------------------------===//
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 <string>
10 
11 #include "src/string/strcat.h"
12 #include "gtest/gtest.h"
13 
14 TEST(StrCatTest, EmptyDest) {
15   std::string abc = "abc";
16   char dest[4];
17 
18   dest[0] = '\0';
19 
20   char *result = __llvm_libc::strcat(dest, abc.c_str());
21   ASSERT_EQ(dest, result);
22   ASSERT_EQ(std::string(dest), abc);
23   ASSERT_EQ(std::string(dest).size(), abc.size());
24 }
25 
26 TEST(StrCatTest, NonEmptyDest) {
27   std::string abc = "abc";
28   char dest[7];
29 
30   dest[0] = 'x';
31   dest[1] = 'y';
32   dest[2] = 'z';
33   dest[3] = '\0';
34 
35   char *result = __llvm_libc::strcat(dest, abc.c_str());
36   ASSERT_EQ(dest, result);
37   ASSERT_EQ(std::string(dest), std::string("xyz") + abc);
38   ASSERT_EQ(std::string(dest).size(), abc.size() + 3);
39 }
40