1 /*

     2  * Copyright (c) 2018, 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 import org.testng.annotations.AfterGroups;

    27 import org.testng.annotations.BeforeGroups;

    28 import org.testng.annotations.Test;

    29 import static org.testng.Assert.*;

    30 

    31 /*

    32  * @test

    33  * @bug 4358774

    34  * @run testng NullOutputStream

    35  * @summary Check for expected behavior of OutputStream.nullOutputStream().

    36  */

    37 public class NullOutputStream {

    38     private static OutputStream openStream;

    39     private static OutputStream closedStream;

    40 

    41     @BeforeGroups(groups="open")

    42     public static void openStream() {

    43         openStream = OutputStream.nullOutputStream();

    44     }

    45 

    46     @BeforeGroups(groups="closed")

    47     public static void openAndCloseStream() {

    48         closedStream = OutputStream.nullOutputStream();

    49         try {

    50            closedStream.close();

    51         } catch (IOException e) {

    52             fail("Unexpected IOException");

    53         }

    54     }

    55 

    56     @AfterGroups(groups="open")

    57     public static void closeStream() {

    58         try {

    59             openStream.close();

    60         } catch (IOException e) {

    61             fail("Unexpected IOException");

    62         }

    63     }

    64 

    65     @Test(groups="open")

    66     public static void testOpen() {

    67         assertNotNull(openStream,

    68             "OutputStream.nullOutputStream() returned null");

    69     }

    70 

    71     @Test(groups="open")

    72     public static void testWrite() {

    73         try {

    74             openStream.write(62832);

    75         } catch (IOException e) {

    76             fail("Unexpected IOException");

    77         }

    78     }

    79 

    80     @Test(groups="open")

    81     public static void testWriteBII() {

    82         try {

    83             openStream.write(new byte[] {(byte)6}, 0, 1);

    84         } catch (Exception e) {

    85             fail("Unexpected IOException");

    86         }

    87     }

    88 

    89     @Test(groups="closed")

    90     public static void testWriteClosed() {

    91         try {

    92             closedStream.write(62832);

    93             fail("Expected IOException not thrown");

    94         } catch (IOException e) {

    95         }

    96     }

    97 

    98     @Test(groups="closed")

    99     public static void testWriteBIIClosed() {

   100         try {

   101             closedStream.write(new byte[] {(byte)6}, 0, 1);

   102             fail("Expected IOException not thrown");

   103         } catch (IOException e) {

   104         }

   105     }

   106 }