1 |
dl |
1.1 |
/* |
2 |
dl |
1.8 |
* Written by Doug Lea with assistance from members of JCP JSR-166 |
3 |
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* Expert Group and released to the public domain, as explained at |
4 |
jsr166 |
1.41 |
* http://creativecommons.org/publicdomain/zero/1.0/ |
5 |
jsr166 |
1.12 |
* Other contributors include Andrew Wright, Jeffrey Hayes, |
6 |
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* Pat Fisher, Mike Judd. |
7 |
dl |
1.1 |
*/ |
8 |
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|
9 |
jsr166 |
1.54 |
import static java.util.concurrent.TimeUnit.MILLISECONDS; |
10 |
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11 |
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import java.util.ArrayList; |
12 |
jsr166 |
1.45 |
import java.util.Arrays; |
13 |
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import java.util.Collection; |
14 |
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import java.util.Comparator; |
15 |
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import java.util.Iterator; |
16 |
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import java.util.NoSuchElementException; |
17 |
jsr166 |
1.46 |
import java.util.Queue; |
18 |
jsr166 |
1.45 |
import java.util.concurrent.BlockingQueue; |
19 |
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import java.util.concurrent.CountDownLatch; |
20 |
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import java.util.concurrent.Executors; |
21 |
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import java.util.concurrent.ExecutorService; |
22 |
jsr166 |
1.54 |
import java.util.concurrent.PriorityBlockingQueue; |
23 |
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24 |
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import junit.framework.Test; |
25 |
dl |
1.1 |
|
26 |
dl |
1.3 |
public class PriorityBlockingQueueTest extends JSR166TestCase { |
27 |
jsr166 |
1.29 |
|
28 |
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public static class Generic extends BlockingQueueTest { |
29 |
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protected BlockingQueue emptyCollection() { |
30 |
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return new PriorityBlockingQueue(); |
31 |
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} |
32 |
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} |
33 |
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34 |
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public static class InitialCapacity extends BlockingQueueTest { |
35 |
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protected BlockingQueue emptyCollection() { |
36 |
jsr166 |
1.47 |
return new PriorityBlockingQueue(SIZE); |
37 |
jsr166 |
1.29 |
} |
38 |
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} |
39 |
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40 |
dl |
1.1 |
public static void main(String[] args) { |
41 |
jsr166 |
1.61 |
main(suite(), args); |
42 |
dl |
1.1 |
} |
43 |
jsr166 |
1.29 |
|
44 |
dl |
1.1 |
public static Test suite() { |
45 |
jsr166 |
1.29 |
return newTestSuite(PriorityBlockingQueueTest.class, |
46 |
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new Generic().testSuite(), |
47 |
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new InitialCapacity().testSuite()); |
48 |
dl |
1.1 |
} |
49 |
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|
50 |
dl |
1.3 |
/** Sample Comparator */ |
51 |
jsr166 |
1.12 |
static class MyReverseComparator implements Comparator { |
52 |
dl |
1.1 |
public int compare(Object x, Object y) { |
53 |
jsr166 |
1.24 |
return ((Comparable)y).compareTo(x); |
54 |
dl |
1.1 |
} |
55 |
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} |
56 |
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57 |
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/** |
58 |
jsr166 |
1.51 |
* Returns a new queue of given size containing consecutive |
59 |
dl |
1.1 |
* Integers 0 ... n. |
60 |
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*/ |
61 |
jsr166 |
1.38 |
private PriorityBlockingQueue<Integer> populatedQueue(int n) { |
62 |
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PriorityBlockingQueue<Integer> q = |
63 |
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new PriorityBlockingQueue<Integer>(n); |
64 |
dl |
1.1 |
assertTrue(q.isEmpty()); |
65 |
jsr166 |
1.56 |
for (int i = n-1; i >= 0; i -= 2) |
66 |
jsr166 |
1.16 |
assertTrue(q.offer(new Integer(i))); |
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jsr166 |
1.56 |
for (int i = (n & 1); i < n; i += 2) |
68 |
jsr166 |
1.16 |
assertTrue(q.offer(new Integer(i))); |
69 |
dl |
1.1 |
assertFalse(q.isEmpty()); |
70 |
jsr166 |
1.59 |
assertEquals(Integer.MAX_VALUE, q.remainingCapacity()); |
71 |
jsr166 |
1.16 |
assertEquals(n, q.size()); |
72 |
dl |
1.1 |
return q; |
73 |
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} |
74 |
jsr166 |
1.12 |
|
75 |
dl |
1.5 |
/** |
76 |
dl |
1.6 |
* A new queue has unbounded capacity |
77 |
dl |
1.5 |
*/ |
78 |
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public void testConstructor1() { |
79 |
jsr166 |
1.59 |
assertEquals(Integer.MAX_VALUE, |
80 |
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new PriorityBlockingQueue(SIZE).remainingCapacity()); |
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dl |
1.1 |
} |
82 |
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|
83 |
dl |
1.5 |
/** |
84 |
jsr166 |
1.19 |
* Constructor throws IAE if capacity argument nonpositive |
85 |
dl |
1.5 |
*/ |
86 |
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public void testConstructor2() { |
87 |
dl |
1.1 |
try { |
88 |
jsr166 |
1.45 |
new PriorityBlockingQueue(0); |
89 |
dl |
1.5 |
shouldThrow(); |
90 |
jsr166 |
1.15 |
} catch (IllegalArgumentException success) {} |
91 |
dl |
1.1 |
} |
92 |
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|
93 |
dl |
1.5 |
/** |
94 |
dl |
1.6 |
* Initializing from null Collection throws NPE |
95 |
dl |
1.5 |
*/ |
96 |
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public void testConstructor3() { |
97 |
dl |
1.1 |
try { |
98 |
jsr166 |
1.45 |
new PriorityBlockingQueue(null); |
99 |
dl |
1.5 |
shouldThrow(); |
100 |
jsr166 |
1.15 |
} catch (NullPointerException success) {} |
101 |
dl |
1.1 |
} |
102 |
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103 |
dl |
1.5 |
/** |
104 |
dl |
1.6 |
* Initializing from Collection of null elements throws NPE |
105 |
dl |
1.5 |
*/ |
106 |
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public void testConstructor4() { |
107 |
jsr166 |
1.45 |
Collection<Integer> elements = Arrays.asList(new Integer[SIZE]); |
108 |
dl |
1.1 |
try { |
109 |
jsr166 |
1.45 |
new PriorityBlockingQueue(elements); |
110 |
dl |
1.5 |
shouldThrow(); |
111 |
jsr166 |
1.15 |
} catch (NullPointerException success) {} |
112 |
dl |
1.1 |
} |
113 |
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114 |
dl |
1.5 |
/** |
115 |
dl |
1.6 |
* Initializing from Collection with some null elements throws NPE |
116 |
dl |
1.5 |
*/ |
117 |
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public void testConstructor5() { |
118 |
jsr166 |
1.45 |
Integer[] ints = new Integer[SIZE]; |
119 |
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for (int i = 0; i < SIZE-1; ++i) |
120 |
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ints[i] = i; |
121 |
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Collection<Integer> elements = Arrays.asList(ints); |
122 |
dl |
1.1 |
try { |
123 |
jsr166 |
1.45 |
new PriorityBlockingQueue(elements); |
124 |
dl |
1.5 |
shouldThrow(); |
125 |
jsr166 |
1.15 |
} catch (NullPointerException success) {} |
126 |
dl |
1.1 |
} |
127 |
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128 |
dl |
1.5 |
/** |
129 |
dl |
1.6 |
* Queue contains all elements of collection used to initialize |
130 |
dl |
1.5 |
*/ |
131 |
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public void testConstructor6() { |
132 |
jsr166 |
1.15 |
Integer[] ints = new Integer[SIZE]; |
133 |
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for (int i = 0; i < SIZE; ++i) |
134 |
jsr166 |
1.45 |
ints[i] = i; |
135 |
jsr166 |
1.15 |
PriorityBlockingQueue q = new PriorityBlockingQueue(Arrays.asList(ints)); |
136 |
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for (int i = 0; i < SIZE; ++i) |
137 |
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assertEquals(ints[i], q.poll()); |
138 |
dl |
1.1 |
} |
139 |
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|
140 |
dl |
1.5 |
/** |
141 |
dl |
1.6 |
* The comparator used in constructor is used |
142 |
dl |
1.5 |
*/ |
143 |
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public void testConstructor7() { |
144 |
jsr166 |
1.15 |
MyReverseComparator cmp = new MyReverseComparator(); |
145 |
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PriorityBlockingQueue q = new PriorityBlockingQueue(SIZE, cmp); |
146 |
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assertEquals(cmp, q.comparator()); |
147 |
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Integer[] ints = new Integer[SIZE]; |
148 |
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for (int i = 0; i < SIZE; ++i) |
149 |
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ints[i] = new Integer(i); |
150 |
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q.addAll(Arrays.asList(ints)); |
151 |
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for (int i = SIZE-1; i >= 0; --i) |
152 |
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assertEquals(ints[i], q.poll()); |
153 |
dl |
1.1 |
} |
154 |
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155 |
dl |
1.5 |
/** |
156 |
dl |
1.6 |
* isEmpty is true before add, false after |
157 |
dl |
1.5 |
*/ |
158 |
dl |
1.1 |
public void testEmpty() { |
159 |
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PriorityBlockingQueue q = new PriorityBlockingQueue(2); |
160 |
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assertTrue(q.isEmpty()); |
161 |
jsr166 |
1.59 |
assertEquals(Integer.MAX_VALUE, q.remainingCapacity()); |
162 |
dl |
1.6 |
q.add(one); |
163 |
dl |
1.1 |
assertFalse(q.isEmpty()); |
164 |
dl |
1.6 |
q.add(two); |
165 |
dl |
1.1 |
q.remove(); |
166 |
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q.remove(); |
167 |
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assertTrue(q.isEmpty()); |
168 |
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} |
169 |
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|
170 |
dl |
1.5 |
/** |
171 |
jsr166 |
1.59 |
* remainingCapacity() always returns Integer.MAX_VALUE |
172 |
dl |
1.5 |
*/ |
173 |
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public void testRemainingCapacity() { |
174 |
jsr166 |
1.59 |
BlockingQueue q = populatedQueue(SIZE); |
175 |
dl |
1.3 |
for (int i = 0; i < SIZE; ++i) { |
176 |
jsr166 |
1.59 |
assertEquals(Integer.MAX_VALUE, q.remainingCapacity()); |
177 |
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assertEquals(SIZE - i, q.size()); |
178 |
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assertEquals(i, q.remove()); |
179 |
dl |
1.1 |
} |
180 |
dl |
1.3 |
for (int i = 0; i < SIZE; ++i) { |
181 |
jsr166 |
1.59 |
assertEquals(Integer.MAX_VALUE, q.remainingCapacity()); |
182 |
dl |
1.1 |
assertEquals(i, q.size()); |
183 |
jsr166 |
1.59 |
assertTrue(q.add(i)); |
184 |
dl |
1.1 |
} |
185 |
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} |
186 |
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|
187 |
dl |
1.5 |
/** |
188 |
dl |
1.6 |
* Offer of comparable element succeeds |
189 |
dl |
1.5 |
*/ |
190 |
dl |
1.1 |
public void testOffer() { |
191 |
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PriorityBlockingQueue q = new PriorityBlockingQueue(1); |
192 |
dl |
1.6 |
assertTrue(q.offer(zero)); |
193 |
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assertTrue(q.offer(one)); |
194 |
dl |
1.1 |
} |
195 |
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|
196 |
dl |
1.5 |
/** |
197 |
dl |
1.6 |
* Offer of non-Comparable throws CCE |
198 |
dl |
1.5 |
*/ |
199 |
dl |
1.1 |
public void testOfferNonComparable() { |
200 |
jsr166 |
1.60 |
PriorityBlockingQueue q = new PriorityBlockingQueue(1); |
201 |
dl |
1.1 |
try { |
202 |
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q.offer(new Object()); |
203 |
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q.offer(new Object()); |
204 |
dl |
1.5 |
shouldThrow(); |
205 |
jsr166 |
1.15 |
} catch (ClassCastException success) {} |
206 |
dl |
1.1 |
} |
207 |
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|
208 |
dl |
1.5 |
/** |
209 |
dl |
1.6 |
* add of comparable succeeds |
210 |
dl |
1.5 |
*/ |
211 |
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public void testAdd() { |
212 |
dl |
1.3 |
PriorityBlockingQueue q = new PriorityBlockingQueue(SIZE); |
213 |
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for (int i = 0; i < SIZE; ++i) { |
214 |
dl |
1.1 |
assertEquals(i, q.size()); |
215 |
|
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assertTrue(q.add(new Integer(i))); |
216 |
|
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} |
217 |
|
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} |
218 |
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|
219 |
dl |
1.5 |
/** |
220 |
dl |
1.7 |
* addAll(this) throws IAE |
221 |
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*/ |
222 |
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public void testAddAllSelf() { |
223 |
jsr166 |
1.62 |
PriorityBlockingQueue q = populatedQueue(SIZE); |
224 |
dl |
1.7 |
try { |
225 |
|
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q.addAll(q); |
226 |
|
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shouldThrow(); |
227 |
jsr166 |
1.15 |
} catch (IllegalArgumentException success) {} |
228 |
dl |
1.7 |
} |
229 |
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|
230 |
dl |
1.5 |
/** |
231 |
dl |
1.6 |
* addAll of a collection with any null elements throws NPE after |
232 |
|
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* possibly adding some elements |
233 |
dl |
1.5 |
*/ |
234 |
|
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public void testAddAll3() { |
235 |
jsr166 |
1.62 |
PriorityBlockingQueue q = new PriorityBlockingQueue(SIZE); |
236 |
|
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Integer[] ints = new Integer[SIZE]; |
237 |
|
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for (int i = 0; i < SIZE-1; ++i) |
238 |
|
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ints[i] = new Integer(i); |
239 |
dl |
1.1 |
try { |
240 |
|
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q.addAll(Arrays.asList(ints)); |
241 |
dl |
1.5 |
shouldThrow(); |
242 |
jsr166 |
1.15 |
} catch (NullPointerException success) {} |
243 |
dl |
1.1 |
} |
244 |
|
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|
245 |
dl |
1.5 |
/** |
246 |
dl |
1.6 |
* Queue contains all elements of successful addAll |
247 |
dl |
1.5 |
*/ |
248 |
|
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public void testAddAll5() { |
249 |
jsr166 |
1.15 |
Integer[] empty = new Integer[0]; |
250 |
|
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Integer[] ints = new Integer[SIZE]; |
251 |
|
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for (int i = SIZE-1; i >= 0; --i) |
252 |
|
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ints[i] = new Integer(i); |
253 |
|
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PriorityBlockingQueue q = new PriorityBlockingQueue(SIZE); |
254 |
|
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assertFalse(q.addAll(Arrays.asList(empty))); |
255 |
|
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assertTrue(q.addAll(Arrays.asList(ints))); |
256 |
|
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for (int i = 0; i < SIZE; ++i) |
257 |
|
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assertEquals(ints[i], q.poll()); |
258 |
dl |
1.1 |
} |
259 |
|
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|
260 |
dl |
1.5 |
/** |
261 |
dl |
1.6 |
* all elements successfully put are contained |
262 |
dl |
1.5 |
*/ |
263 |
jsr166 |
1.42 |
public void testPut() { |
264 |
|
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PriorityBlockingQueue q = new PriorityBlockingQueue(SIZE); |
265 |
|
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for (int i = 0; i < SIZE; ++i) { |
266 |
jsr166 |
1.57 |
Integer x = new Integer(i); |
267 |
|
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q.put(x); |
268 |
|
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assertTrue(q.contains(x)); |
269 |
jsr166 |
1.42 |
} |
270 |
|
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assertEquals(SIZE, q.size()); |
271 |
dl |
1.1 |
} |
272 |
|
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|
273 |
dl |
1.5 |
/** |
274 |
dl |
1.6 |
* put doesn't block waiting for take |
275 |
dl |
1.5 |
*/ |
276 |
jsr166 |
1.15 |
public void testPutWithTake() throws InterruptedException { |
277 |
dl |
1.1 |
final PriorityBlockingQueue q = new PriorityBlockingQueue(2); |
278 |
jsr166 |
1.15 |
final int size = 4; |
279 |
jsr166 |
1.44 |
Thread t = newStartedThread(new CheckedRunnable() { |
280 |
jsr166 |
1.15 |
public void realRun() { |
281 |
|
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for (int i = 0; i < size; i++) |
282 |
|
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q.put(new Integer(0)); |
283 |
|
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}}); |
284 |
|
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|
285 |
jsr166 |
1.44 |
awaitTermination(t); |
286 |
|
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assertEquals(size, q.size()); |
287 |
jsr166 |
1.15 |
q.take(); |
288 |
dl |
1.1 |
} |
289 |
|
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|
290 |
dl |
1.5 |
/** |
291 |
dl |
1.6 |
* timed offer does not time out |
292 |
dl |
1.5 |
*/ |
293 |
jsr166 |
1.15 |
public void testTimedOffer() throws InterruptedException { |
294 |
dl |
1.1 |
final PriorityBlockingQueue q = new PriorityBlockingQueue(2); |
295 |
jsr166 |
1.44 |
Thread t = newStartedThread(new CheckedRunnable() { |
296 |
jsr166 |
1.18 |
public void realRun() { |
297 |
|
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q.put(new Integer(0)); |
298 |
|
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q.put(new Integer(0)); |
299 |
jsr166 |
1.22 |
assertTrue(q.offer(new Integer(0), SHORT_DELAY_MS, MILLISECONDS)); |
300 |
|
|
assertTrue(q.offer(new Integer(0), LONG_DELAY_MS, MILLISECONDS)); |
301 |
jsr166 |
1.18 |
}}); |
302 |
jsr166 |
1.12 |
|
303 |
jsr166 |
1.44 |
awaitTermination(t); |
304 |
dl |
1.1 |
} |
305 |
|
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|
306 |
dl |
1.5 |
/** |
307 |
dl |
1.6 |
* take retrieves elements in priority order |
308 |
dl |
1.5 |
*/ |
309 |
jsr166 |
1.15 |
public void testTake() throws InterruptedException { |
310 |
|
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PriorityBlockingQueue q = populatedQueue(SIZE); |
311 |
|
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for (int i = 0; i < SIZE; ++i) { |
312 |
jsr166 |
1.24 |
assertEquals(i, q.take()); |
313 |
jsr166 |
1.15 |
} |
314 |
dl |
1.1 |
} |
315 |
|
|
|
316 |
dl |
1.5 |
/** |
317 |
dl |
1.6 |
* Take removes existing elements until empty, then blocks interruptibly |
318 |
dl |
1.5 |
*/ |
319 |
jsr166 |
1.15 |
public void testBlockingTake() throws InterruptedException { |
320 |
jsr166 |
1.23 |
final PriorityBlockingQueue q = populatedQueue(SIZE); |
321 |
jsr166 |
1.44 |
final CountDownLatch pleaseInterrupt = new CountDownLatch(1); |
322 |
|
|
Thread t = newStartedThread(new CheckedRunnable() { |
323 |
jsr166 |
1.15 |
public void realRun() throws InterruptedException { |
324 |
|
|
for (int i = 0; i < SIZE; ++i) { |
325 |
jsr166 |
1.23 |
assertEquals(i, q.take()); |
326 |
jsr166 |
1.15 |
} |
327 |
jsr166 |
1.44 |
|
328 |
|
|
Thread.currentThread().interrupt(); |
329 |
jsr166 |
1.23 |
try { |
330 |
|
|
q.take(); |
331 |
|
|
shouldThrow(); |
332 |
|
|
} catch (InterruptedException success) {} |
333 |
jsr166 |
1.44 |
assertFalse(Thread.interrupted()); |
334 |
|
|
|
335 |
|
|
pleaseInterrupt.countDown(); |
336 |
|
|
try { |
337 |
|
|
q.take(); |
338 |
|
|
shouldThrow(); |
339 |
|
|
} catch (InterruptedException success) {} |
340 |
|
|
assertFalse(Thread.interrupted()); |
341 |
jsr166 |
1.15 |
}}); |
342 |
|
|
|
343 |
jsr166 |
1.44 |
await(pleaseInterrupt); |
344 |
|
|
assertThreadStaysAlive(t); |
345 |
jsr166 |
1.15 |
t.interrupt(); |
346 |
jsr166 |
1.44 |
awaitTermination(t); |
347 |
dl |
1.1 |
} |
348 |
|
|
|
349 |
dl |
1.5 |
/** |
350 |
dl |
1.6 |
* poll succeeds unless empty |
351 |
dl |
1.5 |
*/ |
352 |
|
|
public void testPoll() { |
353 |
dl |
1.3 |
PriorityBlockingQueue q = populatedQueue(SIZE); |
354 |
|
|
for (int i = 0; i < SIZE; ++i) { |
355 |
jsr166 |
1.24 |
assertEquals(i, q.poll()); |
356 |
dl |
1.1 |
} |
357 |
jsr166 |
1.16 |
assertNull(q.poll()); |
358 |
dl |
1.1 |
} |
359 |
|
|
|
360 |
dl |
1.5 |
/** |
361 |
jsr166 |
1.34 |
* timed poll with zero timeout succeeds when non-empty, else times out |
362 |
dl |
1.5 |
*/ |
363 |
jsr166 |
1.15 |
public void testTimedPoll0() throws InterruptedException { |
364 |
|
|
PriorityBlockingQueue q = populatedQueue(SIZE); |
365 |
|
|
for (int i = 0; i < SIZE; ++i) { |
366 |
jsr166 |
1.24 |
assertEquals(i, q.poll(0, MILLISECONDS)); |
367 |
jsr166 |
1.15 |
} |
368 |
jsr166 |
1.17 |
assertNull(q.poll(0, MILLISECONDS)); |
369 |
dl |
1.1 |
} |
370 |
|
|
|
371 |
dl |
1.5 |
/** |
372 |
jsr166 |
1.34 |
* timed poll with nonzero timeout succeeds when non-empty, else times out |
373 |
dl |
1.5 |
*/ |
374 |
jsr166 |
1.15 |
public void testTimedPoll() throws InterruptedException { |
375 |
jsr166 |
1.44 |
PriorityBlockingQueue<Integer> q = populatedQueue(SIZE); |
376 |
jsr166 |
1.15 |
for (int i = 0; i < SIZE; ++i) { |
377 |
jsr166 |
1.44 |
long startTime = System.nanoTime(); |
378 |
|
|
assertEquals(i, (int) q.poll(LONG_DELAY_MS, MILLISECONDS)); |
379 |
|
|
assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS); |
380 |
|
|
} |
381 |
|
|
long startTime = System.nanoTime(); |
382 |
|
|
assertNull(q.poll(timeoutMillis(), MILLISECONDS)); |
383 |
|
|
assertTrue(millisElapsedSince(startTime) >= timeoutMillis()); |
384 |
|
|
checkEmpty(q); |
385 |
dl |
1.1 |
} |
386 |
|
|
|
387 |
dl |
1.5 |
/** |
388 |
dl |
1.6 |
* Interrupted timed poll throws InterruptedException instead of |
389 |
|
|
* returning timeout status |
390 |
dl |
1.5 |
*/ |
391 |
jsr166 |
1.15 |
public void testInterruptedTimedPoll() throws InterruptedException { |
392 |
jsr166 |
1.40 |
final BlockingQueue<Integer> q = populatedQueue(SIZE); |
393 |
|
|
final CountDownLatch aboutToWait = new CountDownLatch(1); |
394 |
|
|
Thread t = newStartedThread(new CheckedRunnable() { |
395 |
jsr166 |
1.15 |
public void realRun() throws InterruptedException { |
396 |
|
|
for (int i = 0; i < SIZE; ++i) { |
397 |
jsr166 |
1.40 |
long t0 = System.nanoTime(); |
398 |
|
|
assertEquals(i, (int) q.poll(LONG_DELAY_MS, MILLISECONDS)); |
399 |
|
|
assertTrue(millisElapsedSince(t0) < SMALL_DELAY_MS); |
400 |
jsr166 |
1.15 |
} |
401 |
jsr166 |
1.40 |
long t0 = System.nanoTime(); |
402 |
|
|
aboutToWait.countDown(); |
403 |
jsr166 |
1.15 |
try { |
404 |
jsr166 |
1.44 |
q.poll(LONG_DELAY_MS, MILLISECONDS); |
405 |
jsr166 |
1.18 |
shouldThrow(); |
406 |
jsr166 |
1.40 |
} catch (InterruptedException success) { |
407 |
|
|
assertTrue(millisElapsedSince(t0) < MEDIUM_DELAY_MS); |
408 |
|
|
} |
409 |
jsr166 |
1.15 |
}}); |
410 |
|
|
|
411 |
jsr166 |
1.40 |
aboutToWait.await(); |
412 |
|
|
waitForThreadToEnterWaitState(t, SMALL_DELAY_MS); |
413 |
jsr166 |
1.15 |
t.interrupt(); |
414 |
jsr166 |
1.40 |
awaitTermination(t, MEDIUM_DELAY_MS); |
415 |
dl |
1.1 |
} |
416 |
|
|
|
417 |
dl |
1.5 |
/** |
418 |
dl |
1.6 |
* peek returns next element, or null if empty |
419 |
dl |
1.5 |
*/ |
420 |
|
|
public void testPeek() { |
421 |
dl |
1.3 |
PriorityBlockingQueue q = populatedQueue(SIZE); |
422 |
|
|
for (int i = 0; i < SIZE; ++i) { |
423 |
jsr166 |
1.24 |
assertEquals(i, q.peek()); |
424 |
|
|
assertEquals(i, q.poll()); |
425 |
dl |
1.1 |
assertTrue(q.peek() == null || |
426 |
jsr166 |
1.24 |
!q.peek().equals(i)); |
427 |
dl |
1.1 |
} |
428 |
jsr166 |
1.16 |
assertNull(q.peek()); |
429 |
dl |
1.1 |
} |
430 |
|
|
|
431 |
dl |
1.5 |
/** |
432 |
dl |
1.6 |
* element returns next element, or throws NSEE if empty |
433 |
dl |
1.5 |
*/ |
434 |
|
|
public void testElement() { |
435 |
dl |
1.3 |
PriorityBlockingQueue q = populatedQueue(SIZE); |
436 |
|
|
for (int i = 0; i < SIZE; ++i) { |
437 |
jsr166 |
1.24 |
assertEquals(i, q.element()); |
438 |
|
|
assertEquals(i, q.poll()); |
439 |
dl |
1.1 |
} |
440 |
|
|
try { |
441 |
|
|
q.element(); |
442 |
dl |
1.5 |
shouldThrow(); |
443 |
jsr166 |
1.15 |
} catch (NoSuchElementException success) {} |
444 |
dl |
1.1 |
} |
445 |
|
|
|
446 |
dl |
1.5 |
/** |
447 |
dl |
1.6 |
* remove removes next element, or throws NSEE if empty |
448 |
dl |
1.5 |
*/ |
449 |
|
|
public void testRemove() { |
450 |
dl |
1.3 |
PriorityBlockingQueue q = populatedQueue(SIZE); |
451 |
|
|
for (int i = 0; i < SIZE; ++i) { |
452 |
jsr166 |
1.24 |
assertEquals(i, q.remove()); |
453 |
dl |
1.1 |
} |
454 |
|
|
try { |
455 |
|
|
q.remove(); |
456 |
dl |
1.5 |
shouldThrow(); |
457 |
jsr166 |
1.15 |
} catch (NoSuchElementException success) {} |
458 |
dl |
1.1 |
} |
459 |
|
|
|
460 |
dl |
1.5 |
/** |
461 |
dl |
1.6 |
* contains(x) reports true when elements added but not yet removed |
462 |
dl |
1.5 |
*/ |
463 |
|
|
public void testContains() { |
464 |
dl |
1.3 |
PriorityBlockingQueue q = populatedQueue(SIZE); |
465 |
|
|
for (int i = 0; i < SIZE; ++i) { |
466 |
dl |
1.1 |
assertTrue(q.contains(new Integer(i))); |
467 |
|
|
q.poll(); |
468 |
|
|
assertFalse(q.contains(new Integer(i))); |
469 |
|
|
} |
470 |
|
|
} |
471 |
|
|
|
472 |
dl |
1.5 |
/** |
473 |
dl |
1.6 |
* clear removes all elements |
474 |
dl |
1.5 |
*/ |
475 |
|
|
public void testClear() { |
476 |
dl |
1.3 |
PriorityBlockingQueue q = populatedQueue(SIZE); |
477 |
dl |
1.1 |
q.clear(); |
478 |
|
|
assertTrue(q.isEmpty()); |
479 |
|
|
assertEquals(0, q.size()); |
480 |
dl |
1.11 |
q.add(one); |
481 |
dl |
1.1 |
assertFalse(q.isEmpty()); |
482 |
dl |
1.11 |
assertTrue(q.contains(one)); |
483 |
dl |
1.1 |
q.clear(); |
484 |
|
|
assertTrue(q.isEmpty()); |
485 |
|
|
} |
486 |
|
|
|
487 |
dl |
1.5 |
/** |
488 |
dl |
1.6 |
* containsAll(c) is true when c contains a subset of elements |
489 |
dl |
1.5 |
*/ |
490 |
|
|
public void testContainsAll() { |
491 |
dl |
1.3 |
PriorityBlockingQueue q = populatedQueue(SIZE); |
492 |
|
|
PriorityBlockingQueue p = new PriorityBlockingQueue(SIZE); |
493 |
|
|
for (int i = 0; i < SIZE; ++i) { |
494 |
dl |
1.1 |
assertTrue(q.containsAll(p)); |
495 |
|
|
assertFalse(p.containsAll(q)); |
496 |
|
|
p.add(new Integer(i)); |
497 |
|
|
} |
498 |
|
|
assertTrue(p.containsAll(q)); |
499 |
|
|
} |
500 |
|
|
|
501 |
dl |
1.5 |
/** |
502 |
dl |
1.6 |
* retainAll(c) retains only those elements of c and reports true if changed |
503 |
dl |
1.5 |
*/ |
504 |
|
|
public void testRetainAll() { |
505 |
dl |
1.3 |
PriorityBlockingQueue q = populatedQueue(SIZE); |
506 |
|
|
PriorityBlockingQueue p = populatedQueue(SIZE); |
507 |
|
|
for (int i = 0; i < SIZE; ++i) { |
508 |
dl |
1.1 |
boolean changed = q.retainAll(p); |
509 |
|
|
if (i == 0) |
510 |
|
|
assertFalse(changed); |
511 |
|
|
else |
512 |
|
|
assertTrue(changed); |
513 |
|
|
|
514 |
|
|
assertTrue(q.containsAll(p)); |
515 |
dl |
1.3 |
assertEquals(SIZE-i, q.size()); |
516 |
dl |
1.1 |
p.remove(); |
517 |
|
|
} |
518 |
|
|
} |
519 |
|
|
|
520 |
dl |
1.5 |
/** |
521 |
dl |
1.6 |
* removeAll(c) removes only those elements of c and reports true if changed |
522 |
dl |
1.5 |
*/ |
523 |
|
|
public void testRemoveAll() { |
524 |
dl |
1.3 |
for (int i = 1; i < SIZE; ++i) { |
525 |
|
|
PriorityBlockingQueue q = populatedQueue(SIZE); |
526 |
|
|
PriorityBlockingQueue p = populatedQueue(i); |
527 |
dl |
1.1 |
assertTrue(q.removeAll(p)); |
528 |
dl |
1.3 |
assertEquals(SIZE-i, q.size()); |
529 |
dl |
1.1 |
for (int j = 0; j < i; ++j) { |
530 |
jsr166 |
1.57 |
Integer x = (Integer)(p.remove()); |
531 |
|
|
assertFalse(q.contains(x)); |
532 |
dl |
1.1 |
} |
533 |
|
|
} |
534 |
|
|
} |
535 |
|
|
|
536 |
dl |
1.5 |
/** |
537 |
jsr166 |
1.30 |
* toArray contains all elements |
538 |
dl |
1.5 |
*/ |
539 |
jsr166 |
1.15 |
public void testToArray() throws InterruptedException { |
540 |
dl |
1.3 |
PriorityBlockingQueue q = populatedQueue(SIZE); |
541 |
jsr166 |
1.16 |
Object[] o = q.toArray(); |
542 |
dl |
1.1 |
Arrays.sort(o); |
543 |
jsr166 |
1.16 |
for (int i = 0; i < o.length; i++) |
544 |
jsr166 |
1.37 |
assertSame(o[i], q.take()); |
545 |
dl |
1.1 |
} |
546 |
|
|
|
547 |
dl |
1.5 |
/** |
548 |
dl |
1.6 |
* toArray(a) contains all elements |
549 |
dl |
1.5 |
*/ |
550 |
jsr166 |
1.15 |
public void testToArray2() throws InterruptedException { |
551 |
jsr166 |
1.38 |
PriorityBlockingQueue<Integer> q = populatedQueue(SIZE); |
552 |
jsr166 |
1.16 |
Integer[] ints = new Integer[SIZE]; |
553 |
jsr166 |
1.38 |
Integer[] array = q.toArray(ints); |
554 |
|
|
assertSame(ints, array); |
555 |
dl |
1.1 |
Arrays.sort(ints); |
556 |
jsr166 |
1.15 |
for (int i = 0; i < ints.length; i++) |
557 |
jsr166 |
1.37 |
assertSame(ints[i], q.take()); |
558 |
dl |
1.1 |
} |
559 |
dl |
1.7 |
|
560 |
|
|
/** |
561 |
jsr166 |
1.35 |
* toArray(incompatible array type) throws ArrayStoreException |
562 |
dl |
1.7 |
*/ |
563 |
|
|
public void testToArray1_BadArg() { |
564 |
jsr166 |
1.24 |
PriorityBlockingQueue q = populatedQueue(SIZE); |
565 |
jsr166 |
1.16 |
try { |
566 |
jsr166 |
1.35 |
q.toArray(new String[10]); |
567 |
jsr166 |
1.16 |
shouldThrow(); |
568 |
jsr166 |
1.19 |
} catch (ArrayStoreException success) {} |
569 |
dl |
1.7 |
} |
570 |
jsr166 |
1.12 |
|
571 |
dl |
1.5 |
/** |
572 |
dl |
1.6 |
* iterator iterates through all elements |
573 |
dl |
1.5 |
*/ |
574 |
|
|
public void testIterator() { |
575 |
dl |
1.3 |
PriorityBlockingQueue q = populatedQueue(SIZE); |
576 |
jsr166 |
1.16 |
Iterator it = q.iterator(); |
577 |
jsr166 |
1.58 |
int i; |
578 |
|
|
for (i = 0; it.hasNext(); i++) |
579 |
dl |
1.1 |
assertTrue(q.contains(it.next())); |
580 |
dl |
1.3 |
assertEquals(i, SIZE); |
581 |
jsr166 |
1.58 |
assertIteratorExhausted(it); |
582 |
|
|
} |
583 |
|
|
|
584 |
|
|
/** |
585 |
|
|
* iterator of empty collection has no elements |
586 |
|
|
*/ |
587 |
|
|
public void testEmptyIterator() { |
588 |
|
|
assertIteratorExhausted(new PriorityBlockingQueue().iterator()); |
589 |
dl |
1.1 |
} |
590 |
|
|
|
591 |
dl |
1.5 |
/** |
592 |
dl |
1.6 |
* iterator.remove removes current element |
593 |
dl |
1.5 |
*/ |
594 |
jsr166 |
1.26 |
public void testIteratorRemove() { |
595 |
dl |
1.1 |
final PriorityBlockingQueue q = new PriorityBlockingQueue(3); |
596 |
|
|
q.add(new Integer(2)); |
597 |
|
|
q.add(new Integer(1)); |
598 |
|
|
q.add(new Integer(3)); |
599 |
|
|
|
600 |
|
|
Iterator it = q.iterator(); |
601 |
|
|
it.next(); |
602 |
|
|
it.remove(); |
603 |
|
|
|
604 |
|
|
it = q.iterator(); |
605 |
|
|
assertEquals(it.next(), new Integer(2)); |
606 |
|
|
assertEquals(it.next(), new Integer(3)); |
607 |
|
|
assertFalse(it.hasNext()); |
608 |
|
|
} |
609 |
|
|
|
610 |
dl |
1.5 |
/** |
611 |
dl |
1.6 |
* toString contains toStrings of elements |
612 |
dl |
1.5 |
*/ |
613 |
|
|
public void testToString() { |
614 |
dl |
1.3 |
PriorityBlockingQueue q = populatedQueue(SIZE); |
615 |
dl |
1.1 |
String s = q.toString(); |
616 |
dl |
1.3 |
for (int i = 0; i < SIZE; ++i) { |
617 |
jsr166 |
1.44 |
assertTrue(s.contains(String.valueOf(i))); |
618 |
dl |
1.1 |
} |
619 |
jsr166 |
1.12 |
} |
620 |
dl |
1.1 |
|
621 |
dl |
1.5 |
/** |
622 |
jsr166 |
1.44 |
* timed poll transfers elements across Executor tasks |
623 |
dl |
1.5 |
*/ |
624 |
dl |
1.1 |
public void testPollInExecutor() { |
625 |
|
|
final PriorityBlockingQueue q = new PriorityBlockingQueue(2); |
626 |
jsr166 |
1.44 |
final CheckedBarrier threadsStarted = new CheckedBarrier(2); |
627 |
dl |
1.1 |
ExecutorService executor = Executors.newFixedThreadPool(2); |
628 |
jsr166 |
1.15 |
executor.execute(new CheckedRunnable() { |
629 |
|
|
public void realRun() throws InterruptedException { |
630 |
jsr166 |
1.25 |
assertNull(q.poll()); |
631 |
jsr166 |
1.44 |
threadsStarted.await(); |
632 |
|
|
assertSame(one, q.poll(LONG_DELAY_MS, MILLISECONDS)); |
633 |
|
|
checkEmpty(q); |
634 |
jsr166 |
1.15 |
}}); |
635 |
|
|
|
636 |
|
|
executor.execute(new CheckedRunnable() { |
637 |
|
|
public void realRun() throws InterruptedException { |
638 |
jsr166 |
1.44 |
threadsStarted.await(); |
639 |
jsr166 |
1.25 |
q.put(one); |
640 |
jsr166 |
1.15 |
}}); |
641 |
jsr166 |
1.12 |
|
642 |
dl |
1.3 |
joinPool(executor); |
643 |
dl |
1.2 |
} |
644 |
|
|
|
645 |
dl |
1.5 |
/** |
646 |
jsr166 |
1.12 |
* A deserialized serialized queue has same elements |
647 |
dl |
1.5 |
*/ |
648 |
jsr166 |
1.15 |
public void testSerialization() throws Exception { |
649 |
jsr166 |
1.46 |
Queue x = populatedQueue(SIZE); |
650 |
|
|
Queue y = serialClone(x); |
651 |
|
|
|
652 |
jsr166 |
1.52 |
assertNotSame(x, y); |
653 |
jsr166 |
1.46 |
assertEquals(x.size(), y.size()); |
654 |
|
|
while (!x.isEmpty()) { |
655 |
|
|
assertFalse(y.isEmpty()); |
656 |
|
|
assertEquals(x.remove(), y.remove()); |
657 |
|
|
} |
658 |
|
|
assertTrue(y.isEmpty()); |
659 |
dl |
1.1 |
} |
660 |
dl |
1.7 |
|
661 |
|
|
/** |
662 |
|
|
* drainTo(c) empties queue into another collection c |
663 |
jsr166 |
1.12 |
*/ |
664 |
dl |
1.7 |
public void testDrainTo() { |
665 |
|
|
PriorityBlockingQueue q = populatedQueue(SIZE); |
666 |
|
|
ArrayList l = new ArrayList(); |
667 |
|
|
q.drainTo(l); |
668 |
jsr166 |
1.48 |
assertEquals(0, q.size()); |
669 |
|
|
assertEquals(SIZE, l.size()); |
670 |
jsr166 |
1.12 |
for (int i = 0; i < SIZE; ++i) |
671 |
dl |
1.7 |
assertEquals(l.get(i), new Integer(i)); |
672 |
dl |
1.11 |
q.add(zero); |
673 |
|
|
q.add(one); |
674 |
|
|
assertFalse(q.isEmpty()); |
675 |
|
|
assertTrue(q.contains(zero)); |
676 |
|
|
assertTrue(q.contains(one)); |
677 |
|
|
l.clear(); |
678 |
|
|
q.drainTo(l); |
679 |
jsr166 |
1.48 |
assertEquals(0, q.size()); |
680 |
|
|
assertEquals(2, l.size()); |
681 |
jsr166 |
1.12 |
for (int i = 0; i < 2; ++i) |
682 |
dl |
1.11 |
assertEquals(l.get(i), new Integer(i)); |
683 |
dl |
1.7 |
} |
684 |
|
|
|
685 |
|
|
/** |
686 |
|
|
* drainTo empties queue |
687 |
jsr166 |
1.12 |
*/ |
688 |
jsr166 |
1.15 |
public void testDrainToWithActivePut() throws InterruptedException { |
689 |
dl |
1.7 |
final PriorityBlockingQueue q = populatedQueue(SIZE); |
690 |
jsr166 |
1.15 |
Thread t = new Thread(new CheckedRunnable() { |
691 |
|
|
public void realRun() { |
692 |
|
|
q.put(new Integer(SIZE+1)); |
693 |
|
|
}}); |
694 |
|
|
|
695 |
|
|
t.start(); |
696 |
|
|
ArrayList l = new ArrayList(); |
697 |
|
|
q.drainTo(l); |
698 |
|
|
assertTrue(l.size() >= SIZE); |
699 |
|
|
for (int i = 0; i < SIZE; ++i) |
700 |
|
|
assertEquals(l.get(i), new Integer(i)); |
701 |
|
|
t.join(); |
702 |
|
|
assertTrue(q.size() + l.size() >= SIZE); |
703 |
dl |
1.7 |
} |
704 |
|
|
|
705 |
|
|
/** |
706 |
jsr166 |
1.31 |
* drainTo(c, n) empties first min(n, size) elements of queue into c |
707 |
jsr166 |
1.12 |
*/ |
708 |
dl |
1.7 |
public void testDrainToN() { |
709 |
dl |
1.11 |
PriorityBlockingQueue q = new PriorityBlockingQueue(SIZE*2); |
710 |
dl |
1.7 |
for (int i = 0; i < SIZE + 2; ++i) { |
711 |
jsr166 |
1.13 |
for (int j = 0; j < SIZE; j++) |
712 |
dl |
1.11 |
assertTrue(q.offer(new Integer(j))); |
713 |
dl |
1.7 |
ArrayList l = new ArrayList(); |
714 |
|
|
q.drainTo(l, i); |
715 |
jsr166 |
1.32 |
int k = (i < SIZE) ? i : SIZE; |
716 |
jsr166 |
1.49 |
assertEquals(k, l.size()); |
717 |
|
|
assertEquals(SIZE-k, q.size()); |
718 |
jsr166 |
1.12 |
for (int j = 0; j < k; ++j) |
719 |
dl |
1.11 |
assertEquals(l.get(j), new Integer(j)); |
720 |
jsr166 |
1.55 |
do {} while (q.poll() != null); |
721 |
dl |
1.7 |
} |
722 |
|
|
} |
723 |
|
|
|
724 |
jsr166 |
1.53 |
/** |
725 |
|
|
* remove(null), contains(null) always return false |
726 |
|
|
*/ |
727 |
|
|
public void testNeverContainsNull() { |
728 |
|
|
Collection<?>[] qs = { |
729 |
|
|
new PriorityBlockingQueue<Object>(), |
730 |
|
|
populatedQueue(2), |
731 |
|
|
}; |
732 |
|
|
|
733 |
|
|
for (Collection<?> q : qs) { |
734 |
|
|
assertFalse(q.contains(null)); |
735 |
|
|
assertFalse(q.remove(null)); |
736 |
|
|
} |
737 |
|
|
} |
738 |
|
|
|
739 |
dl |
1.1 |
} |