1 //===----------------------------------------------------------------------===//
2 //
3 // The LLVM Compiler Infrastructure
4 //
5 // This file is dual licensed under the MIT and the University of Illinois Open
6 // Source Licenses. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9
10 // <string>
11
12 // void resize(size_type n);
13
14 #include <string>
15 #include <stdexcept>
16 #include <cassert>
17
18 #include "test_macros.h"
19 #include "min_allocator.h"
20
21 template <class S>
22 void
test(S s,typename S::size_type n,S expected)23 test(S s, typename S::size_type n, S expected)
24 {
25 if (n <= s.max_size())
26 {
27 s.resize(n);
28 LIBCPP_ASSERT(s.__invariants());
29 assert(s == expected);
30 }
31 #ifndef TEST_HAS_NO_EXCEPTIONS
32 else
33 {
34 try
35 {
36 s.resize(n);
37 assert(false);
38 }
39 catch (std::length_error&)
40 {
41 assert(n > s.max_size());
42 }
43 }
44 #endif
45 }
46
main()47 int main()
48 {
49 {
50 typedef std::string S;
51 test(S(), 0, S());
52 test(S(), 1, S(1, '\0'));
53 test(S(), 10, S(10, '\0'));
54 test(S(), 100, S(100, '\0'));
55 test(S("12345"), 0, S());
56 test(S("12345"), 2, S("12"));
57 test(S("12345"), 5, S("12345"));
58 test(S("12345"), 15, S("12345\0\0\0\0\0\0\0\0\0\0", 15));
59 test(S("12345678901234567890123456789012345678901234567890"), 0, S());
60 test(S("12345678901234567890123456789012345678901234567890"), 10,
61 S("1234567890"));
62 test(S("12345678901234567890123456789012345678901234567890"), 50,
63 S("12345678901234567890123456789012345678901234567890"));
64 test(S("12345678901234567890123456789012345678901234567890"), 60,
65 S("12345678901234567890123456789012345678901234567890\0\0\0\0\0\0\0\0\0\0", 60));
66 test(S(), S::npos, S("not going to happen"));
67 }
68 #if TEST_STD_VER >= 11
69 {
70 typedef std::basic_string<char, std::char_traits<char>, min_allocator<char>> S;
71 test(S(), 0, S());
72 test(S(), 1, S(1, '\0'));
73 test(S(), 10, S(10, '\0'));
74 test(S(), 100, S(100, '\0'));
75 test(S("12345"), 0, S());
76 test(S("12345"), 2, S("12"));
77 test(S("12345"), 5, S("12345"));
78 test(S("12345"), 15, S("12345\0\0\0\0\0\0\0\0\0\0", 15));
79 test(S("12345678901234567890123456789012345678901234567890"), 0, S());
80 test(S("12345678901234567890123456789012345678901234567890"), 10,
81 S("1234567890"));
82 test(S("12345678901234567890123456789012345678901234567890"), 50,
83 S("12345678901234567890123456789012345678901234567890"));
84 test(S("12345678901234567890123456789012345678901234567890"), 60,
85 S("12345678901234567890123456789012345678901234567890\0\0\0\0\0\0\0\0\0\0", 60));
86 test(S(), S::npos, S("not going to happen"));
87 }
88 #endif
89 }
90