1 //===-- Unittests for stpcpy ----------------------------------------------===//
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 "src/string/stpcpy.h"
10 #include "utils/UnitTest/Test.h"
11 
12 #include "src/string/string_utils.h"
13 
14 TEST(LlvmLibcStpCpyTest, EmptySrc) {
15   const char *empty = "";
16   size_t srcSize = __llvm_libc::internal::string_length(empty);
17   char dest[4] = {'a', 'b', 'c', '\0'};
18 
19   char *result = __llvm_libc::stpcpy(dest, empty);
20   ASSERT_EQ(dest + srcSize, result);
21   ASSERT_EQ(result[0], '\0');
22   ASSERT_STREQ(dest, empty);
23 }
24 
25 TEST(LlvmLibcStpCpyTest, EmptyDest) {
26   const char *abc = "abc";
27   size_t srcSize = __llvm_libc::internal::string_length(abc);
28   char dest[4];
29 
30   char *result = __llvm_libc::stpcpy(dest, abc);
31   ASSERT_EQ(dest + srcSize, result);
32   ASSERT_EQ(result[0], '\0');
33   ASSERT_STREQ(dest, abc);
34 }
35 
36 TEST(LlvmLibcStpCpyTest, OffsetDest) {
37   const char *abc = "abc";
38   size_t srcSize = __llvm_libc::internal::string_length(abc);
39   char dest[7] = {'x', 'y', 'z'};
40 
41   char *result = __llvm_libc::stpcpy(dest + 3, abc);
42   ASSERT_EQ(dest + 3 + srcSize, result);
43   ASSERT_EQ(result[0], '\0');
44   ASSERT_STREQ(dest, "xyzabc");
45 }
46