1/*
2 * Written by Doug Lea with assistance from members of JCP JSR-166
3 * Expert Group and released to the public domain, as explained at
4 * http://creativecommons.org/publicdomain/zero/1.0/
5 * Other contributors include Andrew Wright, Jeffrey Hayes,
6 * Pat Fisher, Mike Judd.
7 */
8
9package jsr166;
10
11import java.util.AbstractQueue;
12import java.util.Arrays;
13import java.util.Iterator;
14import java.util.NoSuchElementException;
15
16import junit.framework.Test;
17import junit.framework.TestSuite;
18
19public class AbstractQueueTest extends JSR166TestCase {
20    // android-note: Removed because the CTS runner does a bad job of
21    // retrying tests that have suite() declarations.
22    //
23    // public static void main(String[] args) {
24    //     main(suite(), args);
25    // }
26    // public static Test suite() {
27    //     return new TestSuite(AbstractQueueTest.class);
28    // }
29
30    static class Succeed extends AbstractQueue<Integer> {
31        public boolean offer(Integer x) {
32            if (x == null) throw new NullPointerException();
33            return true;
34        }
35        public Integer peek() { return one; }
36        public Integer poll() { return one; }
37        public int size() { return 0; }
38        public Iterator iterator() { return null; } // not needed
39    }
40
41    static class Fail extends AbstractQueue<Integer> {
42        public boolean offer(Integer x) {
43            if (x == null) throw new NullPointerException();
44            return false;
45        }
46        public Integer peek() { return null; }
47        public Integer poll() { return null; }
48        public int size() { return 0; }
49        public Iterator iterator() { return null; } // not needed
50    }
51
52    /**
53     * add returns true if offer succeeds
54     */
55    public void testAddS() {
56        Succeed q = new Succeed();
57        assertTrue(q.add(two));
58    }
59
60    /**
61     * add throws ISE true if offer fails
62     */
63    public void testAddF() {
64        Fail q = new Fail();
65        try {
66            q.add(one);
67            shouldThrow();
68        } catch (IllegalStateException success) {}
69    }
70
71    /**
72     * add throws NPE if offer does
73     */
74    public void testAddNPE() {
75        Succeed q = new Succeed();
76        try {
77            q.add(null);
78            shouldThrow();
79        } catch (NullPointerException success) {}
80    }
81
82    /**
83     * remove returns normally if poll succeeds
84     */
85    public void testRemoveS() {
86        Succeed q = new Succeed();
87        q.remove();
88    }
89
90    /**
91     * remove throws NSEE if poll returns null
92     */
93    public void testRemoveF() {
94        Fail q = new Fail();
95        try {
96            q.remove();
97            shouldThrow();
98        } catch (NoSuchElementException success) {}
99    }
100
101    /**
102     * element returns normally if peek succeeds
103     */
104    public void testElementS() {
105        Succeed q = new Succeed();
106        q.element();
107    }
108
109    /**
110     * element throws NSEE if peek returns null
111     */
112    public void testElementF() {
113        Fail q = new Fail();
114        try {
115            q.element();
116            shouldThrow();
117        } catch (NoSuchElementException success) {}
118    }
119
120    /**
121     * addAll(null) throws NPE
122     */
123    public void testAddAll1() {
124        Succeed q = new Succeed();
125        try {
126            q.addAll(null);
127            shouldThrow();
128        } catch (NullPointerException success) {}
129    }
130
131    /**
132     * addAll(this) throws IAE
133     */
134    public void testAddAllSelf() {
135        Succeed q = new Succeed();
136        try {
137            q.addAll(q);
138            shouldThrow();
139        } catch (IllegalArgumentException success) {}
140    }
141
142    /**
143     * addAll of a collection with null elements throws NPE
144     */
145    public void testAddAll2() {
146        Succeed q = new Succeed();
147        Integer[] ints = new Integer[SIZE];
148        try {
149            q.addAll(Arrays.asList(ints));
150            shouldThrow();
151        } catch (NullPointerException success) {}
152    }
153
154    /**
155     * addAll of a collection with any null elements throws NPE after
156     * possibly adding some elements
157     */
158    public void testAddAll3() {
159        Succeed q = new Succeed();
160        Integer[] ints = new Integer[SIZE];
161        for (int i = 0; i < SIZE - 1; ++i)
162            ints[i] = new Integer(i);
163        try {
164            q.addAll(Arrays.asList(ints));
165            shouldThrow();
166        } catch (NullPointerException success) {}
167    }
168
169    /**
170     * addAll throws ISE if an add fails
171     */
172    public void testAddAll4() {
173        Fail q = new Fail();
174        Integer[] ints = new Integer[SIZE];
175        for (int i = 0; i < SIZE; ++i)
176            ints[i] = new Integer(i);
177        try {
178            q.addAll(Arrays.asList(ints));
179            shouldThrow();
180        } catch (IllegalStateException success) {}
181    }
182
183}
184