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 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 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