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    1   /* BufferedSeekInputStreamTest
    2   *
    3   * Created on September 18, 2006
    4   *
    5   * Copyright (C) 2006 Internet Archive.
    6   *
    7   * This file is part of the Heritrix web crawler (crawler.archive.org).
    8   *
    9   * Heritrix is free software; you can redistribute it and/or modify
    10  * it under the terms of the GNU Lesser Public License as published by
    11  * the Free Software Foundation; either version 2.1 of the License, or
    12  * any later version.
    13  *
    14  * Heritrix is distributed in the hope that it will be useful,
    15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
    16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    17  * GNU Lesser Public License for more details.
    18  *
    19  * You should have received a copy of the GNU Lesser Public License
    20  * along with Heritrix; if not, write to the Free Software
    21  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
    22  */
    23  package org.archive.io;
    24
    25  import java.util.Random;
    26
    27  import junit.framework.TestCase;
    28
    29
    30  /***
    31   * Unit test for BufferedSeekInputStream.  The tests do some random
    32   * repositioning in the stream to make sure the buffer is always valid.
    33   *
    34   * @author pjack
    35   */
    36  public class BufferedSeekInputStreamTest extends TestCase {
    37
    38
    39      private static byte[] TEST_DATA = makeTestData();
    40
    41      public void testPosition() throws Exception {
    42          Random random = new Random();
    43          ArraySeekInputStream asis = new ArraySeekInputStream(TEST_DATA);
    44          BufferedSeekInputStream bsis = new BufferedSeekInputStream(asis, 11);
    45          for (int i = 0; i < TEST_DATA.length; i++) {
    46              byte b = (byte)bsis.read();
    47              assertEquals(TEST_DATA[i], b);
    48          }
    49          for (int i = 0; i < 1000; i++) {
    50              int index = random.nextInt(TEST_DATA.length);
    51              bsis.position(index);
    52              char expected = (char)((int)TEST_DATA[index] & 0xFF);
    53              char read = (char)(bsis.read() & 0xFF);
    54              assertEquals(expected, read);
    55          }
    56      }
    57
    58
    59      private static byte[] makeTestData() {
    60          String s = "If the dull substance of my flesh were thought\n"
    61           + "Injurious distance could not stop my way\n"
    62           + "For then, despite of space, I would be brought\n"
    63           + "From limits far remote where thou dost stay.\n";
    64          byte[] r = new byte[s.length()];
    65          for (int i = 0; i < r.length; i++) {
    66              r[i] = (byte)s.charAt(i);
    67  //            r[i] = (byte)s.charAt(i);
    68          }
    69          return r;
    70      }
    71  }