1 /*
 2  * Copyright (c) 2021, 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  * @summary check if LookupPolicy.of correctly handles valid and illegal
27  * combinations of characteristics bit mask flags.
28  * @run testng LookupPolicyOfTest
29  */
30 
31 import org.testng.annotations.DataProvider;
32 import org.testng.annotations.Test;
33 
34 import java.net.spi.InetAddressResolver.LookupPolicy;
35 import java.util.List;
36 
37 import static java.net.spi.InetAddressResolver.LookupPolicy.IPV4;
38 import static java.net.spi.InetAddressResolver.LookupPolicy.IPV4_FIRST;
39 import static java.net.spi.InetAddressResolver.LookupPolicy.IPV6;
40 import static java.net.spi.InetAddressResolver.LookupPolicy.IPV6_FIRST;
41 
42 public class LookupPolicyOfTest {
43 
44     @Test(dataProvider = "validCharacteristics")
45     public void testValidCharacteristicCombinations(List<Integer> validCombination) {
46         LookupPolicy.of(bitFlagsToCharacteristicsValue(validCombination));
47     }
48 
49     @Test(dataProvider = "invalidCharacteristics", expectedExceptions = IllegalArgumentException.class)
50     public void testInvalidCharacteristicCombinations(List<Integer> invalidCombination) {
51         LookupPolicy.of(bitFlagsToCharacteristicsValue(invalidCombination));
52     }
53 
54     @DataProvider(name = "validCharacteristics")
55     public Object[][] validCharacteristicValue() {
56         return new Object[][]{
57                 {List.of(IPV4)},
58                 {List.of(IPV4, IPV4_FIRST)},
59                 {List.of(IPV6)},
60                 {List.of(IPV6, IPV6_FIRST)},
61                 {List.of(IPV4, IPV6)},
62                 {List.of(IPV4, IPV6, IPV4_FIRST)},
63                 {List.of(IPV4, IPV6, IPV6_FIRST)},
64                 // Custom flag values alongside to address type flags
65                 // that could be used by custom providers
66                 {List.of(IPV4, IPV6, 0x10)},
67                 {List.of(IPV4, IPV6, 0x20)},
68         };
69     }
70 
71     @DataProvider(name = "invalidCharacteristics")
72     public Object[][] illegalCharacteristicValue() {
73         return new Object[][]{
74                 {List.of()},
75                 {List.of(IPV4_FIRST)},
76                 {List.of(IPV6_FIRST)},
77                 {List.of(IPV4_FIRST, IPV6_FIRST)},
78                 {List.of(IPV4, IPV6_FIRST)},
79                 {List.of(IPV6, IPV4_FIRST)},
80                 {List.of(IPV4, IPV6, IPV4_FIRST, IPV6_FIRST)},
81         };
82     }
83 
84     private static int bitFlagsToCharacteristicsValue(List<Integer> bitFlagsList) {
85         return bitFlagsList.stream()
86                 .reduce(0, (flag1, flag2) -> flag1 | flag2);
87     }
88 }