libstdc++-v3/testsuite/21_strings/basic_string/capacity/char/1.cc

   1 // 1999-05-11 bkoz
   2
   3 // Copyright (C) 1999, 2002, 2003 Free Software Foundation, Inc.
   4 //
   5 // This file is part of the GNU ISO C++ Library.  This library is free
   6 // software; you can redistribute it and/or modify it under the
   7 // terms of the GNU General Public License as published by the
   8 // Free Software Foundation; either version 2, or (at your option)
   9 // any later version.
  10
  11 // This library is distributed in the hope that it will be useful,
  12 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 // GNU General Public License for more details.
  15
  16 // You should have received a copy of the GNU General Public License along
  17 // with this library; see the file COPYING.  If not, write to the Free
  18 // Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
  19 // USA.
  20
  21 // 21.3.3 string capacity
  22
  23 #include <string>
  24 #include <testsuite_hooks.h>
  25
  26 void test01()
  27 {
  28   // POD types : resize, capacity, reserve
  29   bool test __attribute__((unused)) = true;
  30   std::string str01;
  31   typedef std::string::size_type size_type_s;
  32
  33   size_type_s sz01 = str01.capacity();
  34   str01.reserve(100);
  35   size_type_s sz02 = str01.capacity();
  36   VERIFY( sz02 >= sz01 );
  37   VERIFY( sz02 >= 100 );
  38   str01.reserve();
  39   sz01 = str01.capacity();
  40   VERIFY( sz01 >= 0 );
  41
  42   sz01 = str01.size() + 5;
  43   str01.resize(sz01);
  44   sz02 = str01.size();
  45   VERIFY( sz01 == sz02 );
  46
  47   sz01 = str01.size() - 5;
  48   str01.resize(sz01);
  49   sz02 = str01.size();
  50   VERIFY( sz01 == sz02 );
  51
  52   std::string str05(30, 'q');
  53   std::string str06 = str05;
  54   str05 = str06 + str05;
  55   VERIFY( str05.capacity() >= str05.size() );
  56   VERIFY( str06.capacity() >= str06.size() );
  57
  58   // POD types: size, length, max_size, clear(), empty()
  59   bool b01;
  60   std::string str011;
  61   b01 = str01.empty();
  62   VERIFY( b01 == true );
  63   sz01 = str01.size();
  64   sz02 = str01.length();
  65   VERIFY( sz01 == sz02 );
  66   str01.c_str();
  67   sz01 = str01.size();
  68   sz02 = str01.length();
  69   VERIFY( sz01 == sz02 );
  70
  71   sz01 = str01.length();
  72   str01.c_str();
  73   str011 = str01 +  "_addendum_";
  74   str01.c_str();
  75   sz02 = str01.length();
  76   VERIFY( sz01 == sz02 );
  77   sz02 = str011.length();
  78   VERIFY( sz02 > sz01 );
  79
  80   // trickster allocator issues involved with these:
  81   std::string str3 = "8-chars_8-chars_";
  82   std::string str4 = str3 + "7-chars";
  83
  84   sz01 = str01.size();
  85   sz02 = str01.max_size();
  86   VERIFY( sz02 >= sz01 );
  87
  88   sz01 = str01.size();
  89   str01.clear();
  90   b01 = str01.empty();
  91   VERIFY( b01 == true );
  92   sz02 = str01.size();
  93   VERIFY( sz01 >= sz02 );
  94 }
  95
  96 int main()
  97 {
  98   test01();
  99   return 0;
 100 }