1 /*

     2  * Copyright (c) 2015, 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 /* @test

    25  * @bug 8081678

    26  * @summary Tests for stream returning methods

    27  * @library ../../util/stream/bootlib

    28  * @build java.util.stream.OpTestCase

    29  * @run testng/othervm NetworkInterfaceStreamTest

    30  * @run testng/othervm -Djava.net.preferIPv4Stack=true NetworkInterfaceStreamTest

    31  */

    32 

    33 import org.testng.annotations.Test;

    34 

    35 import java.net.InetAddress;

    36 import java.net.NetworkInterface;

    37 import java.net.SocketException;

    38 import java.util.ArrayList;

    39 import java.util.Collection;

    40 import java.util.Collections;

    41 import java.util.function.Supplier;

    42 import java.util.stream.OpTestCase;

    43 import java.util.stream.Stream;

    44 import java.util.stream.TestData;

    45 

    46 public class NetworkInterfaceStreamTest extends OpTestCase {

    47 

    48     @Test

    49     public void testNetworkInterfaces() throws SocketException {

    50         Supplier<Stream<NetworkInterface>> ss = () -> {

    51             try {

    52                 return NetworkInterface.networkInterfaces();

    53             }

    54             catch (SocketException e) {

    55                 throw new RuntimeException(e);

    56             }

    57         };

    58 

    59         Collection<NetworkInterface> expected = Collections.list(NetworkInterface.getNetworkInterfaces());

    60         withData(TestData.Factory.ofSupplier("Top-level network interfaces", ss))

    61                 .stream(s -> s)

    62                 .expectedResult(expected)

    63                 .exercise();

    64     }

    65 

    66 

    67     private Collection<NetworkInterface> getAllNetworkInterfaces() throws SocketException {

    68         Collection<NetworkInterface> anis = new ArrayList<>();

    69         for (NetworkInterface ni : Collections.list(NetworkInterface.getNetworkInterfaces())) {

    70             getAllSubNetworkInterfaces(ni, anis);

    71         }

    72         return anis;

    73     }

    74 

    75     private void getAllSubNetworkInterfaces(NetworkInterface ni, Collection<NetworkInterface> result) {

    76         result.add(ni);

    77 

    78         for (NetworkInterface sni : Collections.list(ni.getSubInterfaces())) {

    79             getAllSubNetworkInterfaces(sni, result);

    80         }

    81     }

    82 

    83     private Stream<NetworkInterface> allNetworkInterfaces() throws SocketException {

    84         return NetworkInterface.networkInterfaces().flatMap(this::allSubNetworkInterfaces);

    85     }

    86 

    87     private Stream<NetworkInterface> allSubNetworkInterfaces(NetworkInterface ni) {

    88         return Stream.concat(

    89                 Stream.of(ni),

    90                 ni.subInterfaces().flatMap(this::allSubNetworkInterfaces));

    91     }

    92 

    93     @Test

    94     public void testSubNetworkInterfaces() throws SocketException {

    95         Supplier<Stream<NetworkInterface>> ss = () -> {

    96             try {

    97                 return allNetworkInterfaces();

    98             }

    99             catch (SocketException e) {

   100                 throw new RuntimeException(e);

   101             }

   102         };

   103 

   104         Collection<NetworkInterface> expected = getAllNetworkInterfaces();

   105         withData(TestData.Factory.ofSupplier("All network interfaces", ss))

   106                 .stream(s -> s)

   107                 .expectedResult(expected)

   108                 .exercise();

   109     }

   110 

   111 

   112     @Test

   113     public void testInetAddresses() throws SocketException {

   114         Supplier<Stream<InetAddress>> ss = () -> {

   115             try {

   116                 return NetworkInterface.networkInterfaces().flatMap(NetworkInterface::inetAddresses);

   117             }

   118             catch (SocketException e) {

   119                 throw new RuntimeException(e);

   120             }

   121         };

   122 

   123         Collection<NetworkInterface> nis = Collections.list(NetworkInterface.getNetworkInterfaces());

   124         Collection<InetAddress> expected = new ArrayList<>();

   125         for (NetworkInterface ni : nis) {

   126             expected.addAll(Collections.list(ni.getInetAddresses()));

   127         }

   128         withData(TestData.Factory.ofSupplier("All inet addresses", ss))

   129                 .stream(s -> s)

   130                 .expectedResult(expected)

   131                 .exercise();

   132     }

   133 

   134 

   135 }