1 |
dl |
1.1 |
/* |
2 |
dl |
1.7 |
* 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 |
1.40 |
* 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.Iterator; |
15 |
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import java.util.NoSuchElementException; |
16 |
jsr166 |
1.46 |
import java.util.Queue; |
17 |
jsr166 |
1.45 |
import java.util.concurrent.BlockingQueue; |
18 |
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import java.util.concurrent.CountDownLatch; |
19 |
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import java.util.concurrent.Executors; |
20 |
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import java.util.concurrent.ExecutorService; |
21 |
jsr166 |
1.54 |
import java.util.concurrent.LinkedBlockingQueue; |
22 |
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23 |
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import junit.framework.Test; |
24 |
dl |
1.1 |
|
25 |
dl |
1.3 |
public class LinkedBlockingQueueTest extends JSR166TestCase { |
26 |
dl |
1.1 |
|
27 |
jsr166 |
1.29 |
public static class Unbounded extends BlockingQueueTest { |
28 |
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protected BlockingQueue emptyCollection() { |
29 |
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return new LinkedBlockingQueue(); |
30 |
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} |
31 |
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} |
32 |
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33 |
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public static class Bounded extends BlockingQueueTest { |
34 |
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protected BlockingQueue emptyCollection() { |
35 |
jsr166 |
1.47 |
return new LinkedBlockingQueue(SIZE); |
36 |
jsr166 |
1.29 |
} |
37 |
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} |
38 |
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|
39 |
dl |
1.1 |
public static void main(String[] args) { |
40 |
jsr166 |
1.59 |
main(suite(), args); |
41 |
dl |
1.1 |
} |
42 |
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43 |
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public static Test suite() { |
44 |
jsr166 |
1.65 |
class Implementation implements CollectionImplementation { |
45 |
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public Class<?> klazz() { return LinkedBlockingQueue.class; } |
46 |
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public Collection emptyCollection() { return new LinkedBlockingQueue(); } |
47 |
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public Object makeElement(int i) { return i; } |
48 |
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public boolean isConcurrent() { return true; } |
49 |
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public boolean permitsNulls() { return false; } |
50 |
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} |
51 |
jsr166 |
1.29 |
return newTestSuite(LinkedBlockingQueueTest.class, |
52 |
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new Unbounded().testSuite(), |
53 |
jsr166 |
1.65 |
new Bounded().testSuite(), |
54 |
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CollectionTest.testSuite(new Implementation())); |
55 |
dl |
1.1 |
} |
56 |
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57 |
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/** |
58 |
jsr166 |
1.51 |
* Returns a new queue of given size containing consecutive |
59 |
jsr166 |
1.64 |
* Integers 0 ... n - 1. |
60 |
dl |
1.1 |
*/ |
61 |
jsr166 |
1.66 |
private static LinkedBlockingQueue<Integer> populatedQueue(int n) { |
62 |
jsr166 |
1.37 |
LinkedBlockingQueue<Integer> q = |
63 |
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new LinkedBlockingQueue<Integer>(n); |
64 |
dl |
1.1 |
assertTrue(q.isEmpty()); |
65 |
jsr166 |
1.15 |
for (int i = 0; i < n; i++) |
66 |
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assertTrue(q.offer(new Integer(i))); |
67 |
dl |
1.1 |
assertFalse(q.isEmpty()); |
68 |
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assertEquals(0, q.remainingCapacity()); |
69 |
jsr166 |
1.15 |
assertEquals(n, q.size()); |
70 |
jsr166 |
1.64 |
assertEquals((Integer) 0, q.peek()); |
71 |
dl |
1.1 |
return q; |
72 |
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} |
73 |
jsr166 |
1.12 |
|
74 |
dl |
1.4 |
/** |
75 |
dl |
1.5 |
* A new queue has the indicated capacity, or Integer.MAX_VALUE if |
76 |
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* none given |
77 |
dl |
1.4 |
*/ |
78 |
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public void testConstructor1() { |
79 |
dl |
1.3 |
assertEquals(SIZE, new LinkedBlockingQueue(SIZE).remainingCapacity()); |
80 |
dl |
1.5 |
assertEquals(Integer.MAX_VALUE, new LinkedBlockingQueue().remainingCapacity()); |
81 |
dl |
1.1 |
} |
82 |
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|
83 |
dl |
1.4 |
/** |
84 |
jsr166 |
1.45 |
* Constructor throws IllegalArgumentException if capacity argument nonpositive |
85 |
dl |
1.4 |
*/ |
86 |
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public void testConstructor2() { |
87 |
dl |
1.1 |
try { |
88 |
jsr166 |
1.45 |
new LinkedBlockingQueue(0); |
89 |
dl |
1.4 |
shouldThrow(); |
90 |
jsr166 |
1.17 |
} catch (IllegalArgumentException success) {} |
91 |
dl |
1.1 |
} |
92 |
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|
93 |
dl |
1.4 |
/** |
94 |
jsr166 |
1.45 |
* Initializing from null Collection throws NullPointerException |
95 |
dl |
1.4 |
*/ |
96 |
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public void testConstructor3() { |
97 |
dl |
1.1 |
try { |
98 |
jsr166 |
1.45 |
new LinkedBlockingQueue(null); |
99 |
dl |
1.4 |
shouldThrow(); |
100 |
jsr166 |
1.17 |
} catch (NullPointerException success) {} |
101 |
dl |
1.1 |
} |
102 |
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|
103 |
dl |
1.4 |
/** |
104 |
jsr166 |
1.45 |
* Initializing from Collection of null elements throws NullPointerException |
105 |
dl |
1.4 |
*/ |
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 LinkedBlockingQueue(elements); |
110 |
dl |
1.4 |
shouldThrow(); |
111 |
jsr166 |
1.17 |
} catch (NullPointerException success) {} |
112 |
dl |
1.1 |
} |
113 |
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|
114 |
dl |
1.4 |
/** |
115 |
jsr166 |
1.45 |
* Initializing from Collection with some null elements throws |
116 |
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* NullPointerException |
117 |
dl |
1.4 |
*/ |
118 |
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public void testConstructor5() { |
119 |
jsr166 |
1.45 |
Integer[] ints = new Integer[SIZE]; |
120 |
jsr166 |
1.60 |
for (int i = 0; i < SIZE - 1; ++i) |
121 |
jsr166 |
1.45 |
ints[i] = new Integer(i); |
122 |
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Collection<Integer> elements = Arrays.asList(ints); |
123 |
dl |
1.1 |
try { |
124 |
jsr166 |
1.45 |
new LinkedBlockingQueue(elements); |
125 |
dl |
1.4 |
shouldThrow(); |
126 |
jsr166 |
1.17 |
} catch (NullPointerException success) {} |
127 |
dl |
1.1 |
} |
128 |
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|
129 |
dl |
1.4 |
/** |
130 |
dl |
1.5 |
* Queue contains all elements of collection used to initialize |
131 |
dl |
1.4 |
*/ |
132 |
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public void testConstructor6() { |
133 |
jsr166 |
1.17 |
Integer[] ints = new Integer[SIZE]; |
134 |
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for (int i = 0; i < SIZE; ++i) |
135 |
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ints[i] = new Integer(i); |
136 |
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LinkedBlockingQueue q = new LinkedBlockingQueue(Arrays.asList(ints)); |
137 |
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for (int i = 0; i < SIZE; ++i) |
138 |
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assertEquals(ints[i], q.poll()); |
139 |
dl |
1.1 |
} |
140 |
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|
141 |
dl |
1.4 |
/** |
142 |
dl |
1.5 |
* Queue transitions from empty to full when elements added |
143 |
dl |
1.4 |
*/ |
144 |
dl |
1.1 |
public void testEmptyFull() { |
145 |
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LinkedBlockingQueue q = new LinkedBlockingQueue(2); |
146 |
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assertTrue(q.isEmpty()); |
147 |
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assertEquals("should have room for 2", 2, q.remainingCapacity()); |
148 |
dl |
1.3 |
q.add(one); |
149 |
dl |
1.1 |
assertFalse(q.isEmpty()); |
150 |
dl |
1.3 |
q.add(two); |
151 |
dl |
1.1 |
assertFalse(q.isEmpty()); |
152 |
dl |
1.4 |
assertEquals(0, q.remainingCapacity()); |
153 |
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assertFalse(q.offer(three)); |
154 |
dl |
1.1 |
} |
155 |
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|
156 |
dl |
1.4 |
/** |
157 |
dl |
1.5 |
* remainingCapacity decreases on add, increases on remove |
158 |
dl |
1.4 |
*/ |
159 |
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public void testRemainingCapacity() { |
160 |
jsr166 |
1.58 |
BlockingQueue q = populatedQueue(SIZE); |
161 |
dl |
1.3 |
for (int i = 0; i < SIZE; ++i) { |
162 |
dl |
1.1 |
assertEquals(i, q.remainingCapacity()); |
163 |
jsr166 |
1.58 |
assertEquals(SIZE, q.size() + q.remainingCapacity()); |
164 |
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assertEquals(i, q.remove()); |
165 |
dl |
1.1 |
} |
166 |
dl |
1.3 |
for (int i = 0; i < SIZE; ++i) { |
167 |
jsr166 |
1.60 |
assertEquals(SIZE - i, q.remainingCapacity()); |
168 |
jsr166 |
1.58 |
assertEquals(SIZE, q.size() + q.remainingCapacity()); |
169 |
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assertTrue(q.add(i)); |
170 |
dl |
1.1 |
} |
171 |
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} |
172 |
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|
173 |
dl |
1.4 |
/** |
174 |
dl |
1.5 |
* Offer succeeds if not full; fails if full |
175 |
dl |
1.4 |
*/ |
176 |
|
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public void testOffer() { |
177 |
dl |
1.1 |
LinkedBlockingQueue q = new LinkedBlockingQueue(1); |
178 |
dl |
1.3 |
assertTrue(q.offer(zero)); |
179 |
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assertFalse(q.offer(one)); |
180 |
dl |
1.1 |
} |
181 |
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|
182 |
dl |
1.4 |
/** |
183 |
jsr166 |
1.45 |
* add succeeds if not full; throws IllegalStateException if full |
184 |
dl |
1.4 |
*/ |
185 |
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public void testAdd() { |
186 |
jsr166 |
1.45 |
LinkedBlockingQueue q = new LinkedBlockingQueue(SIZE); |
187 |
|
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for (int i = 0; i < SIZE; ++i) |
188 |
|
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assertTrue(q.add(new Integer(i))); |
189 |
|
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assertEquals(0, q.remainingCapacity()); |
190 |
jsr166 |
1.15 |
try { |
191 |
dl |
1.3 |
q.add(new Integer(SIZE)); |
192 |
jsr166 |
1.17 |
shouldThrow(); |
193 |
|
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} catch (IllegalStateException success) {} |
194 |
dl |
1.1 |
} |
195 |
|
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|
196 |
dl |
1.4 |
/** |
197 |
jsr166 |
1.45 |
* addAll(this) throws IllegalArgumentException |
198 |
dl |
1.6 |
*/ |
199 |
|
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public void testAddAllSelf() { |
200 |
jsr166 |
1.45 |
LinkedBlockingQueue q = populatedQueue(SIZE); |
201 |
dl |
1.6 |
try { |
202 |
|
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q.addAll(q); |
203 |
|
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shouldThrow(); |
204 |
jsr166 |
1.17 |
} catch (IllegalArgumentException success) {} |
205 |
dl |
1.6 |
} |
206 |
|
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|
207 |
dl |
1.4 |
/** |
208 |
dl |
1.5 |
* addAll of a collection with any null elements throws NPE after |
209 |
|
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* possibly adding some elements |
210 |
dl |
1.4 |
*/ |
211 |
|
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public void testAddAll3() { |
212 |
jsr166 |
1.45 |
LinkedBlockingQueue q = new LinkedBlockingQueue(SIZE); |
213 |
|
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Integer[] ints = new Integer[SIZE]; |
214 |
jsr166 |
1.60 |
for (int i = 0; i < SIZE - 1; ++i) |
215 |
jsr166 |
1.45 |
ints[i] = new Integer(i); |
216 |
|
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Collection<Integer> elements = Arrays.asList(ints); |
217 |
dl |
1.1 |
try { |
218 |
jsr166 |
1.45 |
q.addAll(elements); |
219 |
dl |
1.4 |
shouldThrow(); |
220 |
jsr166 |
1.17 |
} catch (NullPointerException success) {} |
221 |
dl |
1.1 |
} |
222 |
jsr166 |
1.27 |
|
223 |
dl |
1.4 |
/** |
224 |
jsr166 |
1.45 |
* addAll throws IllegalStateException if not enough room |
225 |
dl |
1.4 |
*/ |
226 |
|
|
public void testAddAll4() { |
227 |
jsr166 |
1.45 |
LinkedBlockingQueue q = new LinkedBlockingQueue(SIZE - 1); |
228 |
|
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Integer[] ints = new Integer[SIZE]; |
229 |
|
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for (int i = 0; i < SIZE; ++i) |
230 |
|
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ints[i] = new Integer(i); |
231 |
|
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Collection<Integer> elements = Arrays.asList(ints); |
232 |
dl |
1.1 |
try { |
233 |
jsr166 |
1.45 |
q.addAll(elements); |
234 |
dl |
1.4 |
shouldThrow(); |
235 |
jsr166 |
1.17 |
} catch (IllegalStateException success) {} |
236 |
dl |
1.1 |
} |
237 |
jsr166 |
1.27 |
|
238 |
dl |
1.4 |
/** |
239 |
dl |
1.5 |
* Queue contains all elements, in traversal order, of successful addAll |
240 |
dl |
1.4 |
*/ |
241 |
|
|
public void testAddAll5() { |
242 |
jsr166 |
1.17 |
Integer[] empty = new Integer[0]; |
243 |
|
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Integer[] ints = new Integer[SIZE]; |
244 |
|
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for (int i = 0; i < SIZE; ++i) |
245 |
|
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ints[i] = new Integer(i); |
246 |
|
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LinkedBlockingQueue q = new LinkedBlockingQueue(SIZE); |
247 |
|
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assertFalse(q.addAll(Arrays.asList(empty))); |
248 |
|
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assertTrue(q.addAll(Arrays.asList(ints))); |
249 |
|
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for (int i = 0; i < SIZE; ++i) |
250 |
|
|
assertEquals(ints[i], q.poll()); |
251 |
dl |
1.1 |
} |
252 |
|
|
|
253 |
dl |
1.4 |
/** |
254 |
dl |
1.5 |
* all elements successfully put are contained |
255 |
dl |
1.4 |
*/ |
256 |
jsr166 |
1.17 |
public void testPut() throws InterruptedException { |
257 |
|
|
LinkedBlockingQueue q = new LinkedBlockingQueue(SIZE); |
258 |
|
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for (int i = 0; i < SIZE; ++i) { |
259 |
jsr166 |
1.56 |
Integer x = new Integer(i); |
260 |
|
|
q.put(x); |
261 |
|
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assertTrue(q.contains(x)); |
262 |
dl |
1.1 |
} |
263 |
jsr166 |
1.17 |
assertEquals(0, q.remainingCapacity()); |
264 |
dl |
1.1 |
} |
265 |
|
|
|
266 |
dl |
1.4 |
/** |
267 |
dl |
1.5 |
* put blocks interruptibly if full |
268 |
dl |
1.4 |
*/ |
269 |
jsr166 |
1.17 |
public void testBlockingPut() throws InterruptedException { |
270 |
jsr166 |
1.22 |
final LinkedBlockingQueue q = new LinkedBlockingQueue(SIZE); |
271 |
jsr166 |
1.44 |
final CountDownLatch pleaseInterrupt = new CountDownLatch(1); |
272 |
|
|
Thread t = newStartedThread(new CheckedRunnable() { |
273 |
jsr166 |
1.22 |
public void realRun() throws InterruptedException { |
274 |
|
|
for (int i = 0; i < SIZE; ++i) |
275 |
|
|
q.put(i); |
276 |
|
|
assertEquals(SIZE, q.size()); |
277 |
|
|
assertEquals(0, q.remainingCapacity()); |
278 |
jsr166 |
1.44 |
|
279 |
|
|
Thread.currentThread().interrupt(); |
280 |
|
|
try { |
281 |
|
|
q.put(99); |
282 |
|
|
shouldThrow(); |
283 |
|
|
} catch (InterruptedException success) {} |
284 |
|
|
assertFalse(Thread.interrupted()); |
285 |
|
|
|
286 |
|
|
pleaseInterrupt.countDown(); |
287 |
jsr166 |
1.17 |
try { |
288 |
jsr166 |
1.22 |
q.put(99); |
289 |
|
|
shouldThrow(); |
290 |
|
|
} catch (InterruptedException success) {} |
291 |
jsr166 |
1.44 |
assertFalse(Thread.interrupted()); |
292 |
jsr166 |
1.17 |
}}); |
293 |
|
|
|
294 |
jsr166 |
1.44 |
await(pleaseInterrupt); |
295 |
jsr166 |
1.69 |
assertThreadBlocks(t, Thread.State.WAITING); |
296 |
jsr166 |
1.17 |
t.interrupt(); |
297 |
jsr166 |
1.44 |
awaitTermination(t); |
298 |
jsr166 |
1.22 |
assertEquals(SIZE, q.size()); |
299 |
|
|
assertEquals(0, q.remainingCapacity()); |
300 |
dl |
1.1 |
} |
301 |
|
|
|
302 |
dl |
1.4 |
/** |
303 |
jsr166 |
1.44 |
* put blocks interruptibly waiting for take when full |
304 |
dl |
1.4 |
*/ |
305 |
jsr166 |
1.17 |
public void testPutWithTake() throws InterruptedException { |
306 |
jsr166 |
1.22 |
final int capacity = 2; |
307 |
dl |
1.1 |
final LinkedBlockingQueue q = new LinkedBlockingQueue(2); |
308 |
jsr166 |
1.44 |
final CountDownLatch pleaseTake = new CountDownLatch(1); |
309 |
|
|
final CountDownLatch pleaseInterrupt = new CountDownLatch(1); |
310 |
|
|
Thread t = newStartedThread(new CheckedRunnable() { |
311 |
jsr166 |
1.22 |
public void realRun() throws InterruptedException { |
312 |
jsr166 |
1.44 |
for (int i = 0; i < capacity; i++) |
313 |
jsr166 |
1.22 |
q.put(i); |
314 |
jsr166 |
1.44 |
pleaseTake.countDown(); |
315 |
|
|
q.put(86); |
316 |
|
|
|
317 |
|
|
pleaseInterrupt.countDown(); |
318 |
jsr166 |
1.17 |
try { |
319 |
jsr166 |
1.22 |
q.put(99); |
320 |
|
|
shouldThrow(); |
321 |
|
|
} catch (InterruptedException success) {} |
322 |
jsr166 |
1.44 |
assertFalse(Thread.interrupted()); |
323 |
jsr166 |
1.17 |
}}); |
324 |
|
|
|
325 |
jsr166 |
1.44 |
await(pleaseTake); |
326 |
jsr166 |
1.48 |
assertEquals(0, q.remainingCapacity()); |
327 |
jsr166 |
1.22 |
assertEquals(0, q.take()); |
328 |
jsr166 |
1.44 |
|
329 |
|
|
await(pleaseInterrupt); |
330 |
jsr166 |
1.68 |
assertThreadBlocks(t, Thread.State.WAITING); |
331 |
jsr166 |
1.17 |
t.interrupt(); |
332 |
jsr166 |
1.44 |
awaitTermination(t); |
333 |
jsr166 |
1.48 |
assertEquals(0, q.remainingCapacity()); |
334 |
dl |
1.1 |
} |
335 |
|
|
|
336 |
dl |
1.4 |
/** |
337 |
dl |
1.5 |
* timed offer times out if full and elements not taken |
338 |
dl |
1.4 |
*/ |
339 |
jsr166 |
1.43 |
public void testTimedOffer() { |
340 |
dl |
1.1 |
final LinkedBlockingQueue q = new LinkedBlockingQueue(2); |
341 |
jsr166 |
1.43 |
final CountDownLatch pleaseInterrupt = new CountDownLatch(1); |
342 |
|
|
Thread t = newStartedThread(new CheckedRunnable() { |
343 |
jsr166 |
1.17 |
public void realRun() throws InterruptedException { |
344 |
|
|
q.put(new Object()); |
345 |
|
|
q.put(new Object()); |
346 |
jsr166 |
1.43 |
long startTime = System.nanoTime(); |
347 |
|
|
assertFalse(q.offer(new Object(), timeoutMillis(), MILLISECONDS)); |
348 |
|
|
assertTrue(millisElapsedSince(startTime) >= timeoutMillis()); |
349 |
|
|
pleaseInterrupt.countDown(); |
350 |
jsr166 |
1.21 |
try { |
351 |
jsr166 |
1.43 |
q.offer(new Object(), 2 * LONG_DELAY_MS, MILLISECONDS); |
352 |
jsr166 |
1.21 |
shouldThrow(); |
353 |
|
|
} catch (InterruptedException success) {} |
354 |
jsr166 |
1.72 |
assertFalse(Thread.interrupted()); |
355 |
jsr166 |
1.21 |
}}); |
356 |
jsr166 |
1.12 |
|
357 |
jsr166 |
1.43 |
await(pleaseInterrupt); |
358 |
jsr166 |
1.69 |
assertThreadBlocks(t, Thread.State.TIMED_WAITING); |
359 |
jsr166 |
1.17 |
t.interrupt(); |
360 |
jsr166 |
1.43 |
awaitTermination(t); |
361 |
dl |
1.1 |
} |
362 |
|
|
|
363 |
dl |
1.4 |
/** |
364 |
dl |
1.5 |
* take retrieves elements in FIFO order |
365 |
dl |
1.4 |
*/ |
366 |
jsr166 |
1.17 |
public void testTake() throws InterruptedException { |
367 |
|
|
LinkedBlockingQueue q = populatedQueue(SIZE); |
368 |
|
|
for (int i = 0; i < SIZE; ++i) { |
369 |
jsr166 |
1.23 |
assertEquals(i, q.take()); |
370 |
jsr166 |
1.15 |
} |
371 |
dl |
1.1 |
} |
372 |
|
|
|
373 |
dl |
1.4 |
/** |
374 |
dl |
1.5 |
* Take removes existing elements until empty, then blocks interruptibly |
375 |
dl |
1.4 |
*/ |
376 |
jsr166 |
1.17 |
public void testBlockingTake() throws InterruptedException { |
377 |
jsr166 |
1.44 |
final BlockingQueue q = populatedQueue(SIZE); |
378 |
|
|
final CountDownLatch pleaseInterrupt = new CountDownLatch(1); |
379 |
|
|
Thread t = newStartedThread(new CheckedRunnable() { |
380 |
jsr166 |
1.17 |
public void realRun() throws InterruptedException { |
381 |
jsr166 |
1.67 |
for (int i = 0; i < SIZE; i++) assertEquals(i, q.take()); |
382 |
jsr166 |
1.44 |
|
383 |
|
|
Thread.currentThread().interrupt(); |
384 |
|
|
try { |
385 |
|
|
q.take(); |
386 |
|
|
shouldThrow(); |
387 |
|
|
} catch (InterruptedException success) {} |
388 |
|
|
assertFalse(Thread.interrupted()); |
389 |
|
|
|
390 |
|
|
pleaseInterrupt.countDown(); |
391 |
jsr166 |
1.22 |
try { |
392 |
|
|
q.take(); |
393 |
|
|
shouldThrow(); |
394 |
|
|
} catch (InterruptedException success) {} |
395 |
jsr166 |
1.44 |
assertFalse(Thread.interrupted()); |
396 |
jsr166 |
1.22 |
}}); |
397 |
jsr166 |
1.17 |
|
398 |
jsr166 |
1.44 |
await(pleaseInterrupt); |
399 |
jsr166 |
1.67 |
assertThreadBlocks(t, Thread.State.WAITING); |
400 |
jsr166 |
1.17 |
t.interrupt(); |
401 |
jsr166 |
1.44 |
awaitTermination(t); |
402 |
dl |
1.1 |
} |
403 |
|
|
|
404 |
dl |
1.4 |
/** |
405 |
dl |
1.5 |
* poll succeeds unless empty |
406 |
dl |
1.4 |
*/ |
407 |
|
|
public void testPoll() { |
408 |
dl |
1.3 |
LinkedBlockingQueue q = populatedQueue(SIZE); |
409 |
|
|
for (int i = 0; i < SIZE; ++i) { |
410 |
jsr166 |
1.23 |
assertEquals(i, q.poll()); |
411 |
dl |
1.1 |
} |
412 |
jsr166 |
1.15 |
assertNull(q.poll()); |
413 |
dl |
1.1 |
} |
414 |
|
|
|
415 |
dl |
1.4 |
/** |
416 |
jsr166 |
1.33 |
* timed poll with zero timeout succeeds when non-empty, else times out |
417 |
dl |
1.4 |
*/ |
418 |
jsr166 |
1.17 |
public void testTimedPoll0() throws InterruptedException { |
419 |
|
|
LinkedBlockingQueue q = populatedQueue(SIZE); |
420 |
|
|
for (int i = 0; i < SIZE; ++i) { |
421 |
jsr166 |
1.23 |
assertEquals(i, q.poll(0, MILLISECONDS)); |
422 |
jsr166 |
1.15 |
} |
423 |
jsr166 |
1.17 |
assertNull(q.poll(0, MILLISECONDS)); |
424 |
dl |
1.1 |
} |
425 |
|
|
|
426 |
dl |
1.4 |
/** |
427 |
jsr166 |
1.33 |
* timed poll with nonzero timeout succeeds when non-empty, else times out |
428 |
dl |
1.4 |
*/ |
429 |
jsr166 |
1.17 |
public void testTimedPoll() throws InterruptedException { |
430 |
jsr166 |
1.44 |
LinkedBlockingQueue<Integer> q = populatedQueue(SIZE); |
431 |
jsr166 |
1.17 |
for (int i = 0; i < SIZE; ++i) { |
432 |
jsr166 |
1.44 |
long startTime = System.nanoTime(); |
433 |
|
|
assertEquals(i, (int) q.poll(LONG_DELAY_MS, MILLISECONDS)); |
434 |
|
|
assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS); |
435 |
|
|
} |
436 |
|
|
long startTime = System.nanoTime(); |
437 |
|
|
assertNull(q.poll(timeoutMillis(), MILLISECONDS)); |
438 |
|
|
assertTrue(millisElapsedSince(startTime) >= timeoutMillis()); |
439 |
|
|
checkEmpty(q); |
440 |
dl |
1.1 |
} |
441 |
|
|
|
442 |
dl |
1.4 |
/** |
443 |
dl |
1.5 |
* Interrupted timed poll throws InterruptedException instead of |
444 |
|
|
* returning timeout status |
445 |
dl |
1.4 |
*/ |
446 |
jsr166 |
1.17 |
public void testInterruptedTimedPoll() throws InterruptedException { |
447 |
jsr166 |
1.39 |
final BlockingQueue<Integer> q = populatedQueue(SIZE); |
448 |
jsr166 |
1.71 |
final CountDownLatch pleaseInterrupt = new CountDownLatch(1); |
449 |
jsr166 |
1.39 |
Thread t = newStartedThread(new CheckedRunnable() { |
450 |
jsr166 |
1.17 |
public void realRun() throws InterruptedException { |
451 |
jsr166 |
1.62 |
long startTime = System.nanoTime(); |
452 |
jsr166 |
1.73 |
for (int i = 0; i < SIZE; i++) |
453 |
jsr166 |
1.39 |
assertEquals(i, (int) q.poll(LONG_DELAY_MS, MILLISECONDS)); |
454 |
jsr166 |
1.73 |
|
455 |
|
|
Thread.currentThread().interrupt(); |
456 |
|
|
try { |
457 |
|
|
q.poll(LONG_DELAY_MS, MILLISECONDS); |
458 |
|
|
shouldThrow(); |
459 |
|
|
} catch (InterruptedException success) {} |
460 |
|
|
assertFalse(Thread.interrupted()); |
461 |
jsr166 |
1.71 |
|
462 |
|
|
pleaseInterrupt.countDown(); |
463 |
jsr166 |
1.19 |
try { |
464 |
jsr166 |
1.62 |
q.poll(LONG_DELAY_MS, MILLISECONDS); |
465 |
jsr166 |
1.19 |
shouldThrow(); |
466 |
jsr166 |
1.71 |
} catch (InterruptedException success) {} |
467 |
|
|
assertFalse(Thread.interrupted()); |
468 |
|
|
|
469 |
|
|
assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS); |
470 |
jsr166 |
1.19 |
}}); |
471 |
jsr166 |
1.17 |
|
472 |
jsr166 |
1.71 |
await(pleaseInterrupt); |
473 |
jsr166 |
1.70 |
assertThreadBlocks(t, Thread.State.TIMED_WAITING); |
474 |
jsr166 |
1.17 |
t.interrupt(); |
475 |
jsr166 |
1.62 |
awaitTermination(t); |
476 |
jsr166 |
1.39 |
checkEmpty(q); |
477 |
dl |
1.1 |
} |
478 |
|
|
|
479 |
dl |
1.4 |
/** |
480 |
dl |
1.5 |
* peek returns next element, or null if empty |
481 |
dl |
1.4 |
*/ |
482 |
|
|
public void testPeek() { |
483 |
dl |
1.3 |
LinkedBlockingQueue q = populatedQueue(SIZE); |
484 |
|
|
for (int i = 0; i < SIZE; ++i) { |
485 |
jsr166 |
1.23 |
assertEquals(i, q.peek()); |
486 |
|
|
assertEquals(i, q.poll()); |
487 |
dl |
1.1 |
assertTrue(q.peek() == null || |
488 |
jsr166 |
1.23 |
!q.peek().equals(i)); |
489 |
dl |
1.1 |
} |
490 |
jsr166 |
1.15 |
assertNull(q.peek()); |
491 |
dl |
1.1 |
} |
492 |
|
|
|
493 |
dl |
1.4 |
/** |
494 |
dl |
1.5 |
* element returns next element, or throws NSEE if empty |
495 |
dl |
1.4 |
*/ |
496 |
|
|
public void testElement() { |
497 |
dl |
1.3 |
LinkedBlockingQueue q = populatedQueue(SIZE); |
498 |
|
|
for (int i = 0; i < SIZE; ++i) { |
499 |
jsr166 |
1.23 |
assertEquals(i, q.element()); |
500 |
|
|
assertEquals(i, q.poll()); |
501 |
dl |
1.1 |
} |
502 |
|
|
try { |
503 |
|
|
q.element(); |
504 |
dl |
1.4 |
shouldThrow(); |
505 |
jsr166 |
1.17 |
} catch (NoSuchElementException success) {} |
506 |
dl |
1.1 |
} |
507 |
|
|
|
508 |
dl |
1.4 |
/** |
509 |
dl |
1.5 |
* remove removes next element, or throws NSEE if empty |
510 |
dl |
1.4 |
*/ |
511 |
|
|
public void testRemove() { |
512 |
dl |
1.3 |
LinkedBlockingQueue q = populatedQueue(SIZE); |
513 |
|
|
for (int i = 0; i < SIZE; ++i) { |
514 |
jsr166 |
1.23 |
assertEquals(i, q.remove()); |
515 |
dl |
1.1 |
} |
516 |
|
|
try { |
517 |
|
|
q.remove(); |
518 |
dl |
1.4 |
shouldThrow(); |
519 |
jsr166 |
1.17 |
} catch (NoSuchElementException success) {} |
520 |
dl |
1.1 |
} |
521 |
|
|
|
522 |
dl |
1.4 |
/** |
523 |
dl |
1.11 |
* An add following remove(x) succeeds |
524 |
|
|
*/ |
525 |
jsr166 |
1.17 |
public void testRemoveElementAndAdd() throws InterruptedException { |
526 |
|
|
LinkedBlockingQueue q = new LinkedBlockingQueue(); |
527 |
|
|
assertTrue(q.add(new Integer(1))); |
528 |
|
|
assertTrue(q.add(new Integer(2))); |
529 |
|
|
assertTrue(q.remove(new Integer(1))); |
530 |
|
|
assertTrue(q.remove(new Integer(2))); |
531 |
|
|
assertTrue(q.add(new Integer(3))); |
532 |
jsr166 |
1.52 |
assertNotNull(q.take()); |
533 |
dl |
1.11 |
} |
534 |
jsr166 |
1.12 |
|
535 |
dl |
1.4 |
/** |
536 |
dl |
1.5 |
* contains(x) reports true when elements added but not yet removed |
537 |
dl |
1.4 |
*/ |
538 |
|
|
public void testContains() { |
539 |
dl |
1.3 |
LinkedBlockingQueue q = populatedQueue(SIZE); |
540 |
|
|
for (int i = 0; i < SIZE; ++i) { |
541 |
dl |
1.1 |
assertTrue(q.contains(new Integer(i))); |
542 |
|
|
q.poll(); |
543 |
|
|
assertFalse(q.contains(new Integer(i))); |
544 |
|
|
} |
545 |
|
|
} |
546 |
|
|
|
547 |
dl |
1.4 |
/** |
548 |
dl |
1.5 |
* clear removes all elements |
549 |
dl |
1.4 |
*/ |
550 |
|
|
public void testClear() { |
551 |
dl |
1.3 |
LinkedBlockingQueue q = populatedQueue(SIZE); |
552 |
dl |
1.1 |
q.clear(); |
553 |
|
|
assertTrue(q.isEmpty()); |
554 |
|
|
assertEquals(0, q.size()); |
555 |
dl |
1.3 |
assertEquals(SIZE, q.remainingCapacity()); |
556 |
|
|
q.add(one); |
557 |
dl |
1.1 |
assertFalse(q.isEmpty()); |
558 |
dl |
1.10 |
assertTrue(q.contains(one)); |
559 |
dl |
1.1 |
q.clear(); |
560 |
|
|
assertTrue(q.isEmpty()); |
561 |
|
|
} |
562 |
|
|
|
563 |
dl |
1.4 |
/** |
564 |
dl |
1.5 |
* containsAll(c) is true when c contains a subset of elements |
565 |
dl |
1.4 |
*/ |
566 |
|
|
public void testContainsAll() { |
567 |
dl |
1.3 |
LinkedBlockingQueue q = populatedQueue(SIZE); |
568 |
|
|
LinkedBlockingQueue p = new LinkedBlockingQueue(SIZE); |
569 |
|
|
for (int i = 0; i < SIZE; ++i) { |
570 |
dl |
1.1 |
assertTrue(q.containsAll(p)); |
571 |
|
|
assertFalse(p.containsAll(q)); |
572 |
|
|
p.add(new Integer(i)); |
573 |
|
|
} |
574 |
|
|
assertTrue(p.containsAll(q)); |
575 |
|
|
} |
576 |
|
|
|
577 |
dl |
1.4 |
/** |
578 |
dl |
1.5 |
* retainAll(c) retains only those elements of c and reports true if changed |
579 |
dl |
1.4 |
*/ |
580 |
|
|
public void testRetainAll() { |
581 |
dl |
1.3 |
LinkedBlockingQueue q = populatedQueue(SIZE); |
582 |
|
|
LinkedBlockingQueue p = populatedQueue(SIZE); |
583 |
|
|
for (int i = 0; i < SIZE; ++i) { |
584 |
dl |
1.1 |
boolean changed = q.retainAll(p); |
585 |
|
|
if (i == 0) |
586 |
|
|
assertFalse(changed); |
587 |
|
|
else |
588 |
|
|
assertTrue(changed); |
589 |
|
|
|
590 |
|
|
assertTrue(q.containsAll(p)); |
591 |
jsr166 |
1.60 |
assertEquals(SIZE - i, q.size()); |
592 |
dl |
1.1 |
p.remove(); |
593 |
|
|
} |
594 |
|
|
} |
595 |
|
|
|
596 |
dl |
1.4 |
/** |
597 |
dl |
1.5 |
* removeAll(c) removes only those elements of c and reports true if changed |
598 |
dl |
1.4 |
*/ |
599 |
|
|
public void testRemoveAll() { |
600 |
dl |
1.3 |
for (int i = 1; i < SIZE; ++i) { |
601 |
|
|
LinkedBlockingQueue q = populatedQueue(SIZE); |
602 |
|
|
LinkedBlockingQueue p = populatedQueue(i); |
603 |
dl |
1.1 |
assertTrue(q.removeAll(p)); |
604 |
jsr166 |
1.60 |
assertEquals(SIZE - i, q.size()); |
605 |
dl |
1.1 |
for (int j = 0; j < i; ++j) { |
606 |
jsr166 |
1.56 |
Integer x = (Integer)(p.remove()); |
607 |
|
|
assertFalse(q.contains(x)); |
608 |
dl |
1.1 |
} |
609 |
|
|
} |
610 |
|
|
} |
611 |
|
|
|
612 |
dl |
1.4 |
/** |
613 |
jsr166 |
1.36 |
* toArray contains all elements in FIFO order |
614 |
dl |
1.4 |
*/ |
615 |
jsr166 |
1.36 |
public void testToArray() { |
616 |
dl |
1.3 |
LinkedBlockingQueue q = populatedQueue(SIZE); |
617 |
jsr166 |
1.15 |
Object[] o = q.toArray(); |
618 |
|
|
for (int i = 0; i < o.length; i++) |
619 |
jsr166 |
1.36 |
assertSame(o[i], q.poll()); |
620 |
dl |
1.1 |
} |
621 |
|
|
|
622 |
dl |
1.4 |
/** |
623 |
jsr166 |
1.36 |
* toArray(a) contains all elements in FIFO order |
624 |
dl |
1.4 |
*/ |
625 |
jsr166 |
1.17 |
public void testToArray2() throws InterruptedException { |
626 |
jsr166 |
1.37 |
LinkedBlockingQueue<Integer> q = populatedQueue(SIZE); |
627 |
jsr166 |
1.15 |
Integer[] ints = new Integer[SIZE]; |
628 |
jsr166 |
1.37 |
Integer[] array = q.toArray(ints); |
629 |
|
|
assertSame(ints, array); |
630 |
jsr166 |
1.17 |
for (int i = 0; i < ints.length; i++) |
631 |
jsr166 |
1.36 |
assertSame(ints[i], q.poll()); |
632 |
dl |
1.1 |
} |
633 |
dl |
1.6 |
|
634 |
|
|
/** |
635 |
jsr166 |
1.34 |
* toArray(incompatible array type) throws ArrayStoreException |
636 |
dl |
1.6 |
*/ |
637 |
|
|
public void testToArray1_BadArg() { |
638 |
jsr166 |
1.23 |
LinkedBlockingQueue q = populatedQueue(SIZE); |
639 |
jsr166 |
1.15 |
try { |
640 |
jsr166 |
1.34 |
q.toArray(new String[10]); |
641 |
jsr166 |
1.15 |
shouldThrow(); |
642 |
jsr166 |
1.17 |
} catch (ArrayStoreException success) {} |
643 |
dl |
1.6 |
} |
644 |
|
|
|
645 |
dl |
1.4 |
/** |
646 |
dl |
1.5 |
* iterator iterates through all elements |
647 |
dl |
1.4 |
*/ |
648 |
jsr166 |
1.17 |
public void testIterator() throws InterruptedException { |
649 |
dl |
1.3 |
LinkedBlockingQueue q = populatedQueue(SIZE); |
650 |
jsr166 |
1.15 |
Iterator it = q.iterator(); |
651 |
jsr166 |
1.57 |
int i; |
652 |
|
|
for (i = 0; it.hasNext(); i++) |
653 |
|
|
assertTrue(q.contains(it.next())); |
654 |
|
|
assertEquals(i, SIZE); |
655 |
|
|
assertIteratorExhausted(it); |
656 |
|
|
|
657 |
|
|
it = q.iterator(); |
658 |
|
|
for (i = 0; it.hasNext(); i++) |
659 |
jsr166 |
1.17 |
assertEquals(it.next(), q.take()); |
660 |
jsr166 |
1.57 |
assertEquals(i, SIZE); |
661 |
|
|
assertIteratorExhausted(it); |
662 |
|
|
} |
663 |
|
|
|
664 |
|
|
/** |
665 |
|
|
* iterator of empty collection has no elements |
666 |
|
|
*/ |
667 |
|
|
public void testEmptyIterator() { |
668 |
|
|
assertIteratorExhausted(new LinkedBlockingQueue().iterator()); |
669 |
dl |
1.1 |
} |
670 |
|
|
|
671 |
dl |
1.4 |
/** |
672 |
dl |
1.5 |
* iterator.remove removes current element |
673 |
|
|
*/ |
674 |
jsr166 |
1.26 |
public void testIteratorRemove() { |
675 |
dl |
1.5 |
final LinkedBlockingQueue q = new LinkedBlockingQueue(3); |
676 |
|
|
q.add(two); |
677 |
|
|
q.add(one); |
678 |
|
|
q.add(three); |
679 |
|
|
|
680 |
|
|
Iterator it = q.iterator(); |
681 |
|
|
it.next(); |
682 |
|
|
it.remove(); |
683 |
jsr166 |
1.12 |
|
684 |
dl |
1.5 |
it = q.iterator(); |
685 |
jsr166 |
1.25 |
assertSame(it.next(), one); |
686 |
|
|
assertSame(it.next(), three); |
687 |
dl |
1.5 |
assertFalse(it.hasNext()); |
688 |
|
|
} |
689 |
|
|
|
690 |
|
|
/** |
691 |
|
|
* iterator ordering is FIFO |
692 |
dl |
1.4 |
*/ |
693 |
dl |
1.1 |
public void testIteratorOrdering() { |
694 |
|
|
final LinkedBlockingQueue q = new LinkedBlockingQueue(3); |
695 |
dl |
1.3 |
q.add(one); |
696 |
|
|
q.add(two); |
697 |
|
|
q.add(three); |
698 |
dl |
1.4 |
assertEquals(0, q.remainingCapacity()); |
699 |
dl |
1.1 |
int k = 0; |
700 |
|
|
for (Iterator it = q.iterator(); it.hasNext();) { |
701 |
jsr166 |
1.23 |
assertEquals(++k, it.next()); |
702 |
dl |
1.1 |
} |
703 |
dl |
1.4 |
assertEquals(3, k); |
704 |
dl |
1.1 |
} |
705 |
|
|
|
706 |
dl |
1.4 |
/** |
707 |
dl |
1.5 |
* Modifications do not cause iterators to fail |
708 |
dl |
1.4 |
*/ |
709 |
jsr166 |
1.26 |
public void testWeaklyConsistentIteration() { |
710 |
dl |
1.1 |
final LinkedBlockingQueue q = new LinkedBlockingQueue(3); |
711 |
dl |
1.3 |
q.add(one); |
712 |
|
|
q.add(two); |
713 |
|
|
q.add(three); |
714 |
jsr166 |
1.17 |
for (Iterator it = q.iterator(); it.hasNext();) { |
715 |
|
|
q.remove(); |
716 |
|
|
it.next(); |
717 |
dl |
1.1 |
} |
718 |
dl |
1.4 |
assertEquals(0, q.size()); |
719 |
dl |
1.1 |
} |
720 |
|
|
|
721 |
dl |
1.4 |
/** |
722 |
dl |
1.5 |
* toString contains toStrings of elements |
723 |
dl |
1.4 |
*/ |
724 |
|
|
public void testToString() { |
725 |
dl |
1.3 |
LinkedBlockingQueue q = populatedQueue(SIZE); |
726 |
dl |
1.1 |
String s = q.toString(); |
727 |
dl |
1.3 |
for (int i = 0; i < SIZE; ++i) { |
728 |
jsr166 |
1.44 |
assertTrue(s.contains(String.valueOf(i))); |
729 |
dl |
1.1 |
} |
730 |
jsr166 |
1.12 |
} |
731 |
dl |
1.1 |
|
732 |
dl |
1.4 |
/** |
733 |
dl |
1.5 |
* offer transfers elements across Executor tasks |
734 |
dl |
1.4 |
*/ |
735 |
dl |
1.1 |
public void testOfferInExecutor() { |
736 |
|
|
final LinkedBlockingQueue q = new LinkedBlockingQueue(2); |
737 |
dl |
1.3 |
q.add(one); |
738 |
|
|
q.add(two); |
739 |
jsr166 |
1.44 |
final CheckedBarrier threadsStarted = new CheckedBarrier(2); |
740 |
jsr166 |
1.61 |
final ExecutorService executor = Executors.newFixedThreadPool(2); |
741 |
|
|
try (PoolCleaner cleaner = cleaner(executor)) { |
742 |
|
|
executor.execute(new CheckedRunnable() { |
743 |
|
|
public void realRun() throws InterruptedException { |
744 |
|
|
assertFalse(q.offer(three)); |
745 |
|
|
threadsStarted.await(); |
746 |
|
|
assertTrue(q.offer(three, LONG_DELAY_MS, MILLISECONDS)); |
747 |
|
|
assertEquals(0, q.remainingCapacity()); |
748 |
|
|
}}); |
749 |
|
|
|
750 |
|
|
executor.execute(new CheckedRunnable() { |
751 |
|
|
public void realRun() throws InterruptedException { |
752 |
|
|
threadsStarted.await(); |
753 |
|
|
assertSame(one, q.take()); |
754 |
|
|
}}); |
755 |
|
|
} |
756 |
dl |
1.1 |
} |
757 |
|
|
|
758 |
dl |
1.4 |
/** |
759 |
jsr166 |
1.44 |
* timed poll retrieves elements across Executor threads |
760 |
dl |
1.4 |
*/ |
761 |
dl |
1.1 |
public void testPollInExecutor() { |
762 |
|
|
final LinkedBlockingQueue q = new LinkedBlockingQueue(2); |
763 |
jsr166 |
1.44 |
final CheckedBarrier threadsStarted = new CheckedBarrier(2); |
764 |
jsr166 |
1.61 |
final ExecutorService executor = Executors.newFixedThreadPool(2); |
765 |
|
|
try (PoolCleaner cleaner = cleaner(executor)) { |
766 |
|
|
executor.execute(new CheckedRunnable() { |
767 |
|
|
public void realRun() throws InterruptedException { |
768 |
|
|
assertNull(q.poll()); |
769 |
|
|
threadsStarted.await(); |
770 |
|
|
assertSame(one, q.poll(LONG_DELAY_MS, MILLISECONDS)); |
771 |
|
|
checkEmpty(q); |
772 |
|
|
}}); |
773 |
|
|
|
774 |
|
|
executor.execute(new CheckedRunnable() { |
775 |
|
|
public void realRun() throws InterruptedException { |
776 |
|
|
threadsStarted.await(); |
777 |
|
|
q.put(one); |
778 |
|
|
}}); |
779 |
|
|
} |
780 |
dl |
1.2 |
} |
781 |
|
|
|
782 |
dl |
1.4 |
/** |
783 |
dl |
1.5 |
* A deserialized serialized queue has same elements in same order |
784 |
dl |
1.4 |
*/ |
785 |
jsr166 |
1.17 |
public void testSerialization() throws Exception { |
786 |
jsr166 |
1.46 |
Queue x = populatedQueue(SIZE); |
787 |
|
|
Queue y = serialClone(x); |
788 |
dl |
1.2 |
|
789 |
jsr166 |
1.52 |
assertNotSame(x, y); |
790 |
jsr166 |
1.46 |
assertEquals(x.size(), y.size()); |
791 |
|
|
assertEquals(x.toString(), y.toString()); |
792 |
|
|
assertTrue(Arrays.equals(x.toArray(), y.toArray())); |
793 |
|
|
while (!x.isEmpty()) { |
794 |
|
|
assertFalse(y.isEmpty()); |
795 |
|
|
assertEquals(x.remove(), y.remove()); |
796 |
|
|
} |
797 |
|
|
assertTrue(y.isEmpty()); |
798 |
dl |
1.6 |
} |
799 |
|
|
|
800 |
|
|
/** |
801 |
|
|
* drainTo(c) empties queue into another collection c |
802 |
jsr166 |
1.12 |
*/ |
803 |
dl |
1.6 |
public void testDrainTo() { |
804 |
|
|
LinkedBlockingQueue q = populatedQueue(SIZE); |
805 |
|
|
ArrayList l = new ArrayList(); |
806 |
|
|
q.drainTo(l); |
807 |
jsr166 |
1.48 |
assertEquals(0, q.size()); |
808 |
|
|
assertEquals(SIZE, l.size()); |
809 |
jsr166 |
1.12 |
for (int i = 0; i < SIZE; ++i) |
810 |
dl |
1.6 |
assertEquals(l.get(i), new Integer(i)); |
811 |
dl |
1.10 |
q.add(zero); |
812 |
|
|
q.add(one); |
813 |
|
|
assertFalse(q.isEmpty()); |
814 |
|
|
assertTrue(q.contains(zero)); |
815 |
|
|
assertTrue(q.contains(one)); |
816 |
|
|
l.clear(); |
817 |
|
|
q.drainTo(l); |
818 |
jsr166 |
1.48 |
assertEquals(0, q.size()); |
819 |
|
|
assertEquals(2, l.size()); |
820 |
jsr166 |
1.12 |
for (int i = 0; i < 2; ++i) |
821 |
dl |
1.10 |
assertEquals(l.get(i), new Integer(i)); |
822 |
dl |
1.6 |
} |
823 |
|
|
|
824 |
|
|
/** |
825 |
|
|
* drainTo empties full queue, unblocking a waiting put. |
826 |
jsr166 |
1.12 |
*/ |
827 |
jsr166 |
1.17 |
public void testDrainToWithActivePut() throws InterruptedException { |
828 |
dl |
1.6 |
final LinkedBlockingQueue q = populatedQueue(SIZE); |
829 |
jsr166 |
1.17 |
Thread t = new Thread(new CheckedRunnable() { |
830 |
|
|
public void realRun() throws InterruptedException { |
831 |
jsr166 |
1.60 |
q.put(new Integer(SIZE + 1)); |
832 |
jsr166 |
1.17 |
}}); |
833 |
|
|
|
834 |
|
|
t.start(); |
835 |
|
|
ArrayList l = new ArrayList(); |
836 |
|
|
q.drainTo(l); |
837 |
|
|
assertTrue(l.size() >= SIZE); |
838 |
|
|
for (int i = 0; i < SIZE; ++i) |
839 |
|
|
assertEquals(l.get(i), new Integer(i)); |
840 |
|
|
t.join(); |
841 |
|
|
assertTrue(q.size() + l.size() >= SIZE); |
842 |
dl |
1.6 |
} |
843 |
|
|
|
844 |
|
|
/** |
845 |
jsr166 |
1.30 |
* drainTo(c, n) empties first min(n, size) elements of queue into c |
846 |
jsr166 |
1.12 |
*/ |
847 |
dl |
1.6 |
public void testDrainToN() { |
848 |
dl |
1.10 |
LinkedBlockingQueue q = new LinkedBlockingQueue(); |
849 |
dl |
1.6 |
for (int i = 0; i < SIZE + 2; ++i) { |
850 |
jsr166 |
1.13 |
for (int j = 0; j < SIZE; j++) |
851 |
dl |
1.10 |
assertTrue(q.offer(new Integer(j))); |
852 |
dl |
1.6 |
ArrayList l = new ArrayList(); |
853 |
|
|
q.drainTo(l, i); |
854 |
jsr166 |
1.31 |
int k = (i < SIZE) ? i : SIZE; |
855 |
jsr166 |
1.49 |
assertEquals(k, l.size()); |
856 |
jsr166 |
1.60 |
assertEquals(SIZE - k, q.size()); |
857 |
jsr166 |
1.12 |
for (int j = 0; j < k; ++j) |
858 |
dl |
1.6 |
assertEquals(l.get(j), new Integer(j)); |
859 |
jsr166 |
1.55 |
do {} while (q.poll() != null); |
860 |
dl |
1.2 |
} |
861 |
dl |
1.1 |
} |
862 |
|
|
|
863 |
jsr166 |
1.53 |
/** |
864 |
|
|
* remove(null), contains(null) always return false |
865 |
|
|
*/ |
866 |
|
|
public void testNeverContainsNull() { |
867 |
|
|
Collection<?>[] qs = { |
868 |
|
|
new LinkedBlockingQueue<Object>(), |
869 |
|
|
populatedQueue(2), |
870 |
|
|
}; |
871 |
|
|
|
872 |
|
|
for (Collection<?> q : qs) { |
873 |
|
|
assertFalse(q.contains(null)); |
874 |
|
|
assertFalse(q.remove(null)); |
875 |
|
|
} |
876 |
|
|
} |
877 |
|
|
|
878 |
dl |
1.1 |
} |