1 //===----------------------------------------------------------------------===//
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 // <string>
10 
11 // basic_string<charT,traits,Allocator>& append(const charT* s);
12 
13 #include <string>
14 #include <stdexcept>
15 #include <cassert>
16 
17 #include "test_macros.h"
18 #include "min_allocator.h"
19 
20 template <class S>
21 void
22 test(S s, const typename S::value_type* str, S expected)
23 {
24     s.append(str);
25     LIBCPP_ASSERT(s.__invariants());
26     assert(s == expected);
27 }
28 
29 int main(int, char**)
30 {
31     {
32     typedef std::string S;
33     test(S(), "", S());
34     test(S(), "12345", S("12345"));
35     test(S(), "12345678901234567890", S("12345678901234567890"));
36 
37     test(S("12345"), "", S("12345"));
38     test(S("12345"), "12345", S("1234512345"));
39     test(S("12345"), "1234567890", S("123451234567890"));
40 
41     test(S("12345678901234567890"), "", S("12345678901234567890"));
42     test(S("12345678901234567890"), "12345", S("1234567890123456789012345"));
43     test(S("12345678901234567890"), "12345678901234567890",
44          S("1234567890123456789012345678901234567890"));
45     }
46 #if TEST_STD_VER >= 11
47     {
48     typedef std::basic_string<char, std::char_traits<char>, min_allocator<char>> S;
49     test(S(), "", S());
50     test(S(), "12345", S("12345"));
51     test(S(), "12345678901234567890", S("12345678901234567890"));
52 
53     test(S("12345"), "", S("12345"));
54     test(S("12345"), "12345", S("1234512345"));
55     test(S("12345"), "1234567890", S("123451234567890"));
56 
57     test(S("12345678901234567890"), "", S("12345678901234567890"));
58     test(S("12345678901234567890"), "12345", S("1234567890123456789012345"));
59     test(S("12345678901234567890"), "12345678901234567890",
60          S("1234567890123456789012345678901234567890"));
61     }
62 #endif
63 
64     { // test appending to self
65     typedef std::string S;
66     S s_short = "123/";
67     S s_long  = "Lorem ipsum dolor sit amet, consectetur/";
68 
69     s_short.append(s_short.c_str());
70     assert(s_short == "123/123/");
71     s_short.append(s_short.c_str());
72     assert(s_short == "123/123/123/123/");
73     s_short.append(s_short.c_str());
74     assert(s_short == "123/123/123/123/123/123/123/123/");
75 
76     s_long.append(s_long.c_str());
77     assert(s_long == "Lorem ipsum dolor sit amet, consectetur/Lorem ipsum dolor sit amet, consectetur/");
78     }
79 
80   return 0;
81 }
82