1 /*
   2  * Copyright (c) 2001, 2017, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  */
  23 
  24 /*
  25  * @test
  26  * @bug 4430395
  27  * @summary Checks if write(int) properly pads unwritten bits with zeros
  28  */
  29 
  30 import java.io.ByteArrayOutputStream;
  31 import java.io.File;
  32 import java.io.IOException;
  33 import java.io.OutputStream;
  34 
  35 import javax.imageio.stream.FileCacheImageOutputStream;
  36 
  37 public class BitPadding {
  38 
  39     public static void main(String[] args) throws IOException {
  40         OutputStream ostream = new ByteArrayOutputStream();
  41         File f = null;
  42         FileCacheImageOutputStream fcios =
  43             new FileCacheImageOutputStream(ostream, f);
  44         fcios.writeBit(1);
  45         fcios.write(96);
  46 
  47         fcios.seek(0);
  48         int r1 = fcios.read();
  49         if (r1 != 128 ) {
  50             throw new RuntimeException("Failed, first byte is " + r1);
  51         }
  52 
  53         int r2 = fcios.read();
  54         if (r2 != 96) {
  55             throw new RuntimeException("Failed, second byte is " + r2);
  56         }
  57     }
  58 }