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 <algorithm>
  20 #include <iostream.h>
  21 #include <stdlib.h>
  22 #include <assert.h>
  23
  24 string X = "Hello";
  25 string Y = "world";
  26 string N = "123";
  27 string c;
  28 const char*  s = ",";
  29
  30 void decltest()
  31 {
  32   string x;
  33   cout << "an empty string:" << x << "\n";
  34   assert(x == "");
  35
  36   string y = "Hello";
  37   cout << "A string initialized to Hello:" << y << "\n";
  38   assert(y == "Hello");
  39
  40   if (y[y.length()-1] == 'o')
  41         y = y + '\n';
  42   assert(y == "Hello\n");
  43   y = "Hello";
  44
  45   string a = y;
  46   cout << "A string initialized to previous string:" << a << "\n";
  47   assert(a == "Hello");
  48   assert(a == y);
  49
  50   string b (a, 1, 2);
  51   cout << "A string initialized to (previous string, 1, 2):" << b << "\n";
  52   assert(b == "el");
  53
  54   char ch = '@';
  55   string z (1, ch);
  56   cout << "A string initialized to @:" << z << "\n";
  57   assert (z == "@");
  58
  59   string n ("20");
  60   cout << "A string initialized to 20:" << n << "\n";
  61   assert(n == "20");
  62
  63   int i = atoi(n.c_str ());
  64   double f = atof(n.c_str ());
  65   cout << "n = " << n << " atoi(n) = " << i << " atof(n) = " << f << "\n";
  66   assert(i == 20);
  67   assert(f == 20);
  68
  69   int ar[] = { 'H', 'e', 'l', 'l', 'o' };
  70   string is (ar, ar+sizeof(ar)/sizeof(ar[0]));
  71   cout << "is = " << is << endl;
  72   assert (is == "Hello");
  73 }
  74
  75 void cattest()
  76 {
  77   string x = X;
  78   string y = Y;
  79   string z = x + y;
  80   cout << "z = x + y = " << z << "\n";
  81   assert(z == "Helloworld");
  82
  83   x += y;
  84   cout << "x += y; x = " << x << "\n";
  85   assert(x == "Helloworld");
  86
  87   y = Y;
  88   x = X;
  89   y.insert (0, x);
  90   cout << "y.insert (0, x); y = " << y << "\n";
  91   assert(y == "Helloworld");
  92
  93   y = Y;
  94   x = X;
  95   x = x + y + x;
  96   cout << "x = x + y + x; x = " << x << "\n";
  97   assert(x == "HelloworldHello");
  98
  99   y = Y;
 100   x = X;
 101   x = y + x + x;
 102   cout << "x = y + x + x; x = " << x << "\n";
 103   assert(x == "worldHelloHello");
 104
 105   x = X;
 106   y = Y;
 107   z = x + s + ' ' + y.substr (y.find ('w'), 1) + y.substr (y.find ('w') + 1) + ".";
 108   cout << "z = x + s +  + y.substr (y.find (w), 1) + y.substr (y.find (w) + 1) + . = " << z << "\n";
 109   assert(z == "Hello, world.");
 110 }
 111
 112 void
 113 findtest()
 114 {
 115   string x;
 116   string::size_type pos;
 117   pos = x.find_last_not_of('X');
 118   assert(pos == string::npos);
 119   pos = x.find_last_not_of("XYZ");
 120   assert(pos == string::npos);
 121
 122   string y("a");
 123   pos = y.find_last_not_of('X');
 124   assert(pos == 0);
 125   pos = y.find_last_not_of('a');
 126   assert(pos == string::npos);
 127   pos = y.find_last_not_of("XYZ");
 128   assert(pos == 0);
 129   pos = y.find_last_not_of("a");
 130   assert(pos == string::npos);
 131
 132   string z("ab");
 133   pos = z.find_last_not_of('X');
 134   assert(pos == 1);
 135   pos = z.find_last_not_of("XYZ");
 136   assert(pos == 1);
 137   pos = z.find_last_not_of('b');
 138   assert(pos == 0);
 139   pos = z.find_last_not_of("Xb");
 140   assert(pos == 0);
 141   pos = z.find_last_not_of("Xa");
 142   assert(pos == 1);
 143   pos = z.find_last_of("ab");
 144   assert(pos == 1);
 145   pos = z.find_last_of("Xa");
 146   assert(pos == 0);
 147   pos = z.find_last_of("Xb");
 148   assert(pos == 1);
 149   pos = z.find_last_of("XYZ");
 150   assert(pos == string::npos);
 151   pos = z.find_last_of('a');
 152   assert(pos == 0);
 153   pos = z.find_last_of('b');
 154   assert(pos == 1);
 155   pos = z.find_last_of('X');
 156   assert(pos == string::npos);
 157 }
 158
 159 void comparetest()
 160 {
 161   string x = X;
 162   string y = Y;
 163   string n = N;
 164   string z = x + y;
 165
 166   assert(x != y);
 167   assert(x == "Hello");
 168   assert(x != z.substr (0, 4));
 169   assert(x.compare (y) < 0);
 170   assert(x.compare (z.substr (0, 6)) < 0);
 171
 172   assert(x.find ("lo") == 3);
 173   assert(x.find ("l", 2) == 2);
 174   assert(x.rfind ("l") == 3);
 175 }
 176
 177 void substrtest()
 178 {
 179   string x = X;
 180
 181   char ch = x[0];
 182   cout << "ch = x[0] = " << ch << "\n";
 183   assert(ch == 'H');
 184
 185   string z = x.substr (2, 3);
 186   cout << "z = x.substr (2, 3) = " << z << "\n";
 187   assert(z == "llo");
 188
 189   x.replace (2, 2, "r");
 190   cout << "x.replace (2, 2, r); x = " << x << "\n";
 191   assert(x == "Hero");
 192
 193   x = X;
 194   x.replace (0, 1, 'j');
 195   cout << "x.replace (0, 1, 'j'); x = " << x << "\n";
 196   assert(x == "jello");
 197
 198   int ar[] = { 'H', 'e', 'l', 'l', 'o' };
 199   x.replace (find (x.begin (), x.end (), 'l'),
 200              find (x.rbegin (), x.rend (), 'l').base (),
 201              ar, ar+sizeof(ar)/sizeof(ar[0]));
 202   cout << "x = " << x << endl;
 203   assert (x == "jeHelloo");
 204 }
 205
 206 void iotest()
 207 {
 208   string z;
 209   cout << "enter a word:";
 210   cin >> z;
 211   cout << "word =" << z << " ";
 212   cout << "length = " << z.length() << "\n";
 213 }
 214
 215 void identitytest(string a, string b)
 216 {
 217   string x = a;
 218   string y = b;
 219   x += b;
 220   y.insert (0, a);
 221   assert((a + b) == x);
 222   assert((a + b) == y);
 223   assert(x == y);
 224
 225   assert((a + b + a) == (a + (b + a)));
 226
 227   x.erase (x.rfind (b));
 228   assert(x == a);
 229
 230   y.replace (0, y.rfind (b), b);
 231   assert(y == (b + b));
 232   y.replace (y.find (b), b.length (), a);
 233   assert(y == (a + b));
 234 }
 235
 236 int main()
 237 {
 238   decltest();
 239   cattest();
 240   comparetest();
 241   findtest();
 242   substrtest();
 243   identitytest(X, X);
 244   identitytest(X, Y);
 245   identitytest(X+Y+N+X+Y+N, "A string that will be used in identitytest but is otherwise just another useless string.");
 246   iotest();
 247   cout << "\nEnd of test\n";
 248   return 0;
 249 }