1 /* offsetSingleBuffer.java -- Test writing offset from a single buffer

     2    Copyright (C) 2006 Michael Barker

     3 This file is part of Mauve.

     4 

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

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

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

     8 any later version.

     9 

    10 Mauve is distributed in the hope that it will be useful, but

    11 WITHOUT ANY WARRANTY; without even the implied warranty of

    12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

    13 General Public License for more details.

    14 

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

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

    17 Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA

    18 02110-1301 USA.

    19 

    20 */

    21 

    22 // Tags: JDK14

    23 

    24 package gnu.testlet.java.nio.channels.FileChannel;

    25 

    26 import gnu.testlet.TestHarness;

    27 import gnu.testlet.Testlet;

    28 

    29 import java.io.File;

    30 import java.io.FileInputStream;

    31 import java.io.FileNotFoundException;

    32 import java.io.FileOutputStream;

    33 import java.io.IOException;

    34 import java.io.UnsupportedEncodingException;

    35 import java.nio.ByteBuffer;

    36 import java.nio.channels.FileChannel;

    37 import java.util.Arrays;

    38 

    39 /**

    40  * @author mike

    41  *

    42  */

    43 public class offsetSingleBuffer implements Testlet

    44 {

    45 

    46   /* (non-Javadoc)

    47    * @see gnu.testlet.Testlet#test(gnu.testlet.TestHarness)

    48    */

    49   public void test(TestHarness harness) 

    50   {

    51     try

    52       {

    53         byte[] data = "qwertyuiopasdfghjklzxcvbnm".getBytes("UTF-8");

    54         ByteBuffer out = ByteBuffer.allocate(50);

    55         out.put(data);

    56         out.flip();

    57         out.position(5);

    58         ByteBuffer in = ByteBuffer.allocate(50);

    59         

    60         String tmpfile = harness.getTempDirectory() + File.separator

    61         + "mauve-offset-single-buffer.tmp";

    62         File f = new File(tmpfile);

    63         

    64         FileOutputStream fOut = new FileOutputStream(f);

    65         FileChannel fc = fOut.getChannel();

    66         int numBytes = fc.write(out);

    67         harness.check(numBytes, data.length - 5, "Number of bytes written");

    68         fc.close();

    69         

    70         harness.check(f.length(), data.length - 5, "Resulting File size");

    71         

    72         in.position(5);

    73         FileInputStream fIn = new FileInputStream(f);

    74         FileChannel fcIn = fIn.getChannel();

    75         int numRead = fcIn.read(in);

    76         harness.check(numRead, data.length - 5, "Number of bytes read");

    77         harness.check(in.position(), data.length, "Buffer position");

    78         in.flip();

    79         byte[] oldData = new byte[data.length - 5];

    80         System.arraycopy(data, 5, oldData, 0, 21);

    81         byte[] newData = new byte[data.length - 5];

    82         in.position(5);

    83         in.get(newData);

    84         harness.check(Arrays.equals(oldData, newData), "File content");

    85         

    86         fcIn.close();

    87         

    88         f.delete();

    89       }

    90     catch (UnsupportedEncodingException e1)

    91       {

    92         harness.fail("Unsupported Encoding");

    93       }

    94     catch (SecurityException e)

    95       {

    96         harness.fail("Unexpected exception: " + e);

    97       }

    98     catch (FileNotFoundException e)

    99       {

   100         harness.fail("Unexpected exception: " + e);

   101       }

   102     catch (IOException e)

   103       {

   104         harness.fail("Unexpected exception: " + e);

   105       }

   106     

   107     

   108   }

   109 

   110 }