1 /*
   2  * Copyright (c) 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 import java.io.IOException;
  25 import java.io.OutputStream;
  26 
  27 /*
  28  * @test
  29  * @bug 4358774
  30  * @summary Check for expected behavior of OutputStream.nullStream().
  31  */
  32 public class NullOutputStream {
  33     public static void main(String[] args) throws IOException {
  34         int failures = 0;
  35 
  36         OutputStream out = OutputStream.nullStream();
  37         if (out == null) {
  38             throw new RuntimeException
  39                 ("OutputStream.nullStream() returned null");
  40         }
  41 
  42         try {
  43             out.write(62832);
  44         } catch (Exception e) {
  45             System.err.println("Unexpected Exception from write()");
  46             failures++;
  47         }
  48         try {
  49             out.write(new byte[] {(byte)6}, 0, 1);
  50         } catch (Exception e) {
  51             System.err.println("Unexpected Exception from write(b,i,i)");
  52             failures++;
  53         }
  54 
  55         out.close();
  56         try {
  57             out.write(62832);
  58             System.err.println("No IOException from write() after closing");
  59             failures++;
  60         } catch (IOException e) {
  61         }
  62         try {
  63             out.write(new byte[] {(byte)6}, 0, 1);
  64             System.err.println("No IOException from write(b,i,i) after closing");
  65             failures++;
  66         } catch (IOException e) {
  67         }
  68 
  69         if (failures != 0) {
  70             throw new RuntimeException("Test failed");
  71         }
  72     }
  73 }