libstdc++/tests/tstring.cc

   1 // Tests for the -*- C++ -*- string classes.
   2 // Copyright (C) 1994 Free Software Foundation
   3
   4 // This file is part of the GNU ANSI C++ Library.  This library is free
   5 // software; you can redistribute it and/or modify it under the terms of
   6 // the GNU General Public License as published by the Free Software
   7 // Foundation; either version 2, or (at your option) any later version.
   8
   9 // This library is distributed in the hope that it will be useful,
  10 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 // GNU General Public License for more details.
  13
  14 // You should have received a copy of the GNU General Public License
  15 // along with this library; see the file COPYING.  If not, write to the Free
  16 // Software Foundation, 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  17
  18 #include <string>
  19 #include <iostream.h>
  20 #include <stdlib.h>
  21 #include <assert.h>
  22
  23 string X = "Hello";
  24 string Y = "world";
  25 string N = "123";
  26 string c;
  27 const char*  s = ",";
  28
  29 void decltest()
  30 {
  31   string x;
  32   cout << "an empty string:" << x << "\n";
  33   assert(x == "");
  34
  35   string y = "Hello";
  36   cout << "A string initialized to Hello:" << y << "\n";
  37   assert(y == "Hello");
  38
  39   if (y[y.length()-1] == 'o')
  40         y = y + '\n';
  41   assert(y == "Hello\n");
  42   y = "Hello";
  43
  44   string a = y;
  45   cout << "A string initialized to previous string:" << a << "\n";
  46   assert(a == "Hello");
  47   assert(a == y);
  48
  49   string b (a, 1, 2);
  50   cout << "A string initialized to (previous string, 1, 2):" << b << "\n";
  51   assert(b == "el");
  52
  53   char ch = '@';
  54   string z (1, ch);
  55   cout << "A string initialized to @:" << z << "\n";
  56   assert (z == "@");
  57
  58   string n ("20");
  59   cout << "A string initialized to 20:" << n << "\n";
  60   assert(n == "20");
  61
  62   int i = atoi(n.c_str ());
  63   double f = atof(n.c_str ());
  64   cout << "n = " << n << " atoi(n) = " << i << " atof(n) = " << f << "\n";
  65   assert(i == 20);
  66   assert(f == 20);
  67
  68 }
  69
  70 void cattest()
  71 {
  72   string x = X;
  73   string y = Y;
  74   string z = x + y;
  75   cout << "z = x + y = " << z << "\n";
  76   assert(z == "Helloworld");
  77
  78   x += y;
  79   cout << "x += y; x = " << x << "\n";
  80   assert(x == "Helloworld");
  81
  82   y = Y;
  83   x = X;
  84   y.insert (0, x);
  85   cout << "y.insert (0, x); y = " << y << "\n";
  86   assert(y == "Helloworld");
  87
  88   y = Y;
  89   x = X;
  90   x = x + y + x;
  91   cout << "x = x + y + x; x = " << x << "\n";
  92   assert(x == "HelloworldHello");
  93
  94   y = Y;
  95   x = X;
  96   x = y + x + x;
  97   cout << "x = y + x + x; x = " << x << "\n";
  98   assert(x == "worldHelloHello");
  99
 100   x = X;
 101   y = Y;
 102   z = x + s + ' ' + y.substr (y.find ('w'), 1) + y.substr (y.find ('w') + 1) + ".";
 103   cout << "z = x + s +  + y.substr (y.find (w), 1) + y.substr (y.find (w) + 1) + . = " << z << "\n";
 104   assert(z == "Hello, world.");
 105 }
 106
 107 void comparetest()
 108 {
 109   string x = X;
 110   string y = Y;
 111   string n = N;
 112   string z = x + y;
 113
 114   assert(x != y);
 115   assert(x == "Hello");
 116   assert(x != z.substr (0, 4));
 117   assert(x.compare (y) < 0);
 118   assert(x.compare (z.substr (0, 6)) < 0);
 119
 120   assert(x.find ("lo") == 3);
 121   assert(x.find ("l", 2) == 2);
 122   assert(x.rfind ("l") == 3);
 123 }
 124
 125 void substrtest()
 126 {
 127   string x = X;
 128
 129   char ch = x[0];
 130   cout << "ch = x[0] = " << ch << "\n";
 131   assert(ch == 'H');
 132
 133   string z = x.substr (2, 3);
 134   cout << "z = x.substr (2, 3) = " << z << "\n";
 135   assert(z == "llo");
 136
 137   x.replace (2, 2, "r");
 138   cout << "x.replace (2, 2, r); x = " << x << "\n";
 139   assert(x == "Hero");
 140
 141   x = X;
 142   x.replace (0, 1, 'j');
 143   cout << "x.replace (0, 1, 'j'); x = " << x << "\n";
 144   assert(x == "jello");
 145 }
 146
 147 void iotest()
 148 {
 149   string z;
 150   cout << "enter a word:";
 151   cin >> z;
 152   cout << "word =" << z << " ";
 153   cout << "length = " << z.length() << "\n";
 154 }
 155
 156 void identitytest(string a, string b)
 157 {
 158   string x = a;
 159   string y = b;
 160   x += b;
 161   y.insert (0, a);
 162   assert((a + b) == x);
 163   assert((a + b) == y);
 164   assert(x == y);
 165
 166   assert((a + b + a) == (a + (b + a)));
 167
 168   x.remove (x.rfind (b));
 169   assert(x == a);
 170
 171   y.replace (0, y.rfind (b), b);
 172   assert(y == (b + b));
 173   y.replace (y.find (b), b.length (), a);
 174   assert(y == (a + b));
 175 }
 176
 177 int main()
 178 {
 179   decltest();
 180   cattest();
 181   comparetest();
 182   substrtest();
 183   identitytest(X, X);
 184   identitytest(X, Y);
 185   identitytest(X+Y+N+X+Y+N, "A string that will be used in identitytest but is otherwise just another useless string.");
 186   iotest();
 187   cout << "\nEnd of test\n";
 188   return 0;
 189 }