1 // Tags: JDK1.4

     2 

     3 // Copyright (C) 2004 Free Software Foundation, Inc.

     4 // Written by Julian Scheid (julian@sektor37.de) and

     5 // Mark J. Wielaard (mark@klomp.org)

     6 

     7 // This file is part of Mauve.

     8 

     9 // Mauve is free software; you can redistribute it and/or modify

    10 // it under the terms of the GNU General Public License as published by

    11 // the Free Software Foundation; either version 2, or (at your option)

    12 // any later version.

    13 

    14 // Mauve 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 General Public License for more details.

    18 

    19 // You should have received a copy of the GNU General Public License

    20 // along with Mauve; see the file COPYING.  If not, write to

    21 // the Free Software Foundation, 59 Temple Place - Suite 330,

    22 // Boston, MA 02111-1307, USA.  */

    23 

    24 package gnu.testlet.java.nio.charset.Charset;

    25 

    26 import gnu.testlet.Testlet;

    27 import gnu.testlet.TestHarness;

    28 

    29 import java.nio.*;

    30 import java.nio.charset.*;

    31 

    32 /**

    33  * Test for some under/overflow situations exposing a bug in GNU

    34  * Classpath UTF_8 Charset implementation found by Julian Scheid

    35  * (julian@sektor37.de).

    36  */

    37 public class UTF8Charset implements Testlet

    38 {

    39   public void test(TestHarness h)

    40   {

    41     final int first_chunk_size = 4;

    42     final int second_chunk_size = 3;

    43     

    44     byte[] inBytes = new byte[first_chunk_size + second_chunk_size];

    45     

    46     // fill with some harmless ASCII7 char

    47     for (int i = 0; i < inBytes.length; ++i)

    48       inBytes[i] = 'X';

    49 

    50     ByteBuffer inBuffer = ByteBuffer.wrap(inBytes);

    51 

    52     CharBuffer outBuffer1 = CharBuffer.allocate(first_chunk_size);

    53     CharBuffer outBuffer2 = CharBuffer.allocate(second_chunk_size);

    54 

    55     Charset utf8Charset = Charset.forName("UTF-8");

    56     CharsetDecoder decoder = utf8Charset.newDecoder();

    57 

    58     CoderResult coderResult1

    59       = decoder.decode(inBuffer, outBuffer1, false);

    60     

    61     h.check(coderResult1.isOverflow(),

    62 	    "Expected decoder to return overflow status");

    63     h.check(first_chunk_size == inBuffer.position(),

    64 	    "Expected input buffer position to be " + first_chunk_size

    65 	    + ", but it is " + inBuffer.position());

    66     

    67     CoderResult coderResult2

    68       = decoder.decode(inBuffer, outBuffer2, false);

    69     

    70     h.check(coderResult2.isUnderflow(),

    71 	    "Expected decoder to return underflow status");

    72     h.check((first_chunk_size + second_chunk_size) == inBuffer.position(),

    73 	    "Expected input buffer position to be "

    74 	    + (first_chunk_size + second_chunk_size)

    75 	    + ", but it is " + inBuffer.position());

    76   }

    77 }