1 /*************************************************************************

     2 /* ZeroRead.java -- BufferedInputStream zero read test

     3 /*

     4 /* Copyright (c) 2004 Free Software Foundation, Inc.

     5 /* Written by Jeroen Frijters (jeroen@frijters.net)

     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., 59 Temple Place - Suite 330, Boston, MA  02111-1307 USA

    20 /*************************************************************************/

    21 

    22 // Tags: JDK1.0

    23 

    24 package gnu.testlet.java.io.BufferedInputStream;

    25 

    26 import gnu.testlet.Testlet;

    27 import gnu.testlet.TestHarness;

    28 import java.io.*;

    29 

    30 public class ZeroRead extends InputStream implements Testlet

    31 {

    32     public int read() throws IOException

    33     {

    34 	throw new IOException();

    35     }

    36 

    37     public int read(byte[] b, int off, int len) throws IOException

    38     {

    39 	if (len == 0)

    40 	    return 0;

    41 	throw new IOException();

    42     }

    43 

    44     public void test(TestHarness harness)

    45     {

    46         try

    47           {

    48 	    // Make sure that a zero length read doesn't result in a read on the

    49 	    // underlying stream.

    50 	    BufferedInputStream bis = new BufferedInputStream(this);

    51             harness.check(bis.read(new byte[0], 0, 0) == 0);

    52 	  }

    53         catch (IOException e)

    54           {

    55 	    harness.debug(e);

    56 	    harness.check(false);

    57 	  }

    58     }

    59 }