libjava/classpath/test/java.io/BufferedReaderTest.java

   1 /*************************************************************************
   2 /* BufferedReaderTest.java -- Tests BufferedReader's
   3 /*
   4 /* Copyright (c) 1998 Free Software Foundation, Inc.
   5 /* Written by Aaron M. Renn (arenn@urbanophile.com)
   6 /*
   7 /* This program is free software; you can redistribute it and/or modify
   8 /* it under the terms of the GNU General Public License as published
   9 /* by the Free Software Foundation, either version 2 of the License, or
  10 /* (at your option) any later version.
  11 /*
  12 /* This program is distributed in the hope that it will be useful, but
  13 /* WITHOUT ANY WARRANTY; without even the implied warranty of
  14 /* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 /* GNU General Public License for more details.
  16 /*
  17 /* You should have received a copy of the GNU General Public License
  18 /* along with this program; if not, write to the Free Software Foundation
  19 /* Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA
  20 /*************************************************************************/
  21
  22 import java.io.*;
  23
  24 public class BufferedReaderTest extends CharArrayReader
  25 {
  26
  27 // Hehe.  We override CharArrayReader.markSupported() in order to return
  28 // false so that we can test BufferedReader's handling of mark/reset in
  29 // both the case where the underlying stream does and does not support
  30 // mark/reset
  31 public boolean
  32 markSupported()
  33 {
  34   return(false);
  35 }
  36
  37 public
  38 BufferedReaderTest(char[] buf)
  39 {
  40   super(buf);
  41 }
  42
  43 public static int
  44 marktest(Reader ins) throws IOException
  45 {
  46   BufferedReader br = new BufferedReader(ins, 15);
  47
  48   int chars_read;
  49   int total_read = 0;
  50   char[] buf = new char[12];
  51
  52   chars_read = br.read(buf);
  53   total_read += chars_read;
  54   System.out.print(new String(buf, 0, chars_read));
  55
  56   chars_read = br.read(buf);
  57   total_read += chars_read;
  58   System.out.print(new String(buf, 0, chars_read));
  59
  60   br.mark(75);
  61   br.read();
  62   br.read(buf);
  63   br.read(buf);
  64   br.read(buf);
  65   br.reset();
  66
  67   chars_read = br.read(buf);
  68   total_read += chars_read;
  69   System.out.print(new String(buf, 0, chars_read));
  70
  71   br.mark(555);
  72
  73   chars_read = br.read(buf);
  74   total_read += chars_read;
  75   System.out.print(new String(buf, 0, chars_read));
  76
  77   br.reset();
  78
  79   br.read(buf);
  80   chars_read = br.read(buf);
  81   total_read += chars_read;
  82   System.out.print(new String(buf, 0, chars_read));
  83
  84   chars_read = br.read(buf);
  85   total_read += chars_read;
  86   System.out.print(new String(buf, 0, chars_read));
  87
  88   br.mark(14);
  89
  90   br.read(buf);
  91
  92   br.reset();
  93
  94   chars_read = br.read(buf);
  95   total_read += chars_read;
  96   System.out.print(new String(buf, 0, chars_read));
  97
  98   while ((chars_read = br.read(buf)) != -1)
  99     {
 100       System.out.print(new String(buf, 0, chars_read));
 101       total_read += chars_read;
 102     }
 103
 104   return(total_read);
 105 }
 106
 107 public static void
 108 main(String[] argv)
 109 {
 110   System.out.println("Started test of BufferedReader");
 111
 112   try
 113     {
 114       System.out.println("Test 1: Simple Read Test");
 115
 116       String str = "My 5th grade teacher was named Mr. Thompson.  Terry\n" +
 117         "George Thompson to be precise.  He had these sideburns like\n" +
 118         "Isaac Asimov's, only uglier.  One time he had a contest and said\n" +
 119         "that if any kid who could lift 50lbs worth of weights on a barbell\n" +
 120         "all the way over their head, he would shave it off.  Nobody could\n" +
 121         "though.  One time I guess I made a comment about how stupid his\n" +
 122         "sideburns worked and he not only kicked me out of class, he called\n" +
 123         "my mother.  Jerk.\n";
 124
 125       StringReader sr = new StringReader(str);
 126       BufferedReader br = new BufferedReader(sr, 15);
 127
 128       char[] buf = new char[12];
 129       int chars_read;
 130       while((chars_read = br.read(buf)) != -1)
 131         System.out.print(new String(buf, 0, chars_read));
 132
 133       br.close();
 134       System.out.println("PASSED: Simple Read Test");
 135     }
 136   catch (IOException e)
 137     {
 138       System.out.println("FAILED: Simple Read Test: " + e);
 139     }
 140
 141   try
 142     {
 143       System.out.println("Test 2: First mark/reset Test");
 144
 145       String str = "Growing up in a rural area brings such delights.  One\n" +
 146         "time my uncle called me up and asked me to come over and help him\n" +
 147         "out with something.  Since he lived right across the field, I\n" +
 148         "walked right over.  Turned out he wanted me to come down to the\n" +
 149         "barn and help him castrate a calf.  Oh, that was fun.  Not.\n";
 150
 151       StringReader sr = new StringReader(str);
 152 //      BufferedReader br = new BufferedReader(sr);
 153
 154       int total_read = marktest(sr);
 155
 156       if (total_read == str.length())
 157         System.out.println("PASSED: First mark/reset Test");
 158       else
 159         System.out.println("FAILED: First mark/reset Test");
 160     }
 161   catch (IOException e)
 162     {
 163       System.out.println("FAILED: First mark/reset Test: " + e);
 164     }
 165
 166   try
 167     {
 168       System.out.println("Test 3: Second mark/reset Test");
 169
 170       String str = "Growing up we heated our house with a wood stove.  That\n" +
 171         "thing could pump out some BTU's, let me tell you.  No matter how\n" +
 172         "cold it got outside, it was always warm inside.  Of course the\n" +
 173         "downside is that somebody had to chop the wood for the stove. That\n" +
 174         "somebody was me.  I was slave labor.  My uncle would go back and\n" +
 175         "chain saw up dead trees and I would load the wood in wagons and\n" +
 176         "split it with a maul. Somehow my no account brother always seemed\n" +
 177         "to get out of having to work.\n";
 178
 179       char[] buf = new char[str.length()];
 180       str.getChars(0, str.length(), buf, 0);
 181       BufferedReaderTest brt = new BufferedReaderTest(buf);
 182 //      BufferedReader br = new BufferedReader(car);
 183
 184       int total_read = marktest(brt);
 185
 186       if (total_read == str.length())
 187         System.out.println("PASSED: Second mark/reset Test");
 188       else
 189         System.out.println("FAILED: Second mark/reset Test");
 190     }
 191   catch (IOException e)
 192     {
 193       System.out.println("FAILED: Second mark/reset Test: " + e);
 194     }
 195
 196   System.out.println("Finished test of BufferedReader");
 197 } // main
 198
 199 } // class BufferedReaderTest
 200