1 /*
2 * Copyright (c) 2012-2024, jcabi.com
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met: 1) Redistributions of source code must retain the above
8 * copyright notice, this list of conditions and the following
9 * disclaimer. 2) Redistributions in binary form must reproduce the above
10 * copyright notice, this list of conditions and the following
11 * disclaimer in the documentation and/or other materials provided
12 * with the distribution. 3) Neither the name of the jcabi.com nor
13 * the names of its contributors may be used to endorse or promote
14 * products derived from this software without specific prior written
15 * permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
18 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT
19 * NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
20 * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
21 * THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
22 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
23 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
24 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
26 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
27 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
28 * OF THE POSSIBILITY OF SUCH DAMAGE.
29 */
30 package com.jcabi.aspects.aj;
31
32 import com.jcabi.aspects.Immutable;
33 import org.hamcrest.MatcherAssert;
34 import org.hamcrest.Matchers;
35 import org.junit.jupiter.api.Assertions;
36 import org.junit.jupiter.api.Test;
37
38 /**
39 * Tests for {@link ImmutabilityChecker}.
40 *
41 * @since 0.7.8
42 */
43 final class ImmutabilityCheckerTest {
44 @Test
45 void checksRecursiveClasses() {
46 MatcherAssert.assertThat(
47 new ImmutabilityCheckerTest.Recursive(null).getNext(), Matchers.nullValue()
48 );
49 }
50
51 @Test
52 void failsOnNonFinalFields() {
53 Assertions.assertThrows(
54 IllegalStateException.class,
55 () -> new ImmutabilityCheckerTest.NonFinal("test")
56 );
57 }
58
59 /**
60 * Class with a field that is not final.
61 *
62 * @since 0.7.8
63 */
64 @Immutable
65 @SuppressWarnings("PMD.ImmutableField")
66 private static final class NonFinal {
67
68 /**
69 * Some private field.
70 */
71 private transient String field;
72
73 /**
74 * Constructor.
75 * @param fld Field to store.
76 */
77 private NonFinal(final String fld) {
78 this.field = fld;
79 }
80 }
81
82 /**
83 * Class that references itself.
84 * @since 0.7.8
85 */
86 @Immutable
87 private static final class Recursive {
88 /**
89 * Next object.
90 */
91 private final transient ImmutabilityCheckerTest.Recursive next;
92
93 /**
94 * Constructor.
95 * @param nxt Next object.
96 */
97 private Recursive(final ImmutabilityCheckerTest.Recursive nxt) {
98 this.next = nxt;
99 }
100
101 /**
102 * Get the next object.
103 * @return Object stored.
104 */
105 public ImmutabilityCheckerTest.Recursive getNext() {
106 return this.next;
107 }
108 }
109 }