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/* |
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* 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 |
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* http://creativecommons.org/licenses/publicdomain |
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* http://creativecommons.org/publicdomain/zero/1.0/ |
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* Other contributors include Andrew Wright, Jeffrey Hayes, |
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* Pat Fisher, Mike Judd. |
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*/ |
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|
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import junit.framework.*; |
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import java.util.*; |
11 |
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import java.util.concurrent.*; |
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import static java.util.concurrent.TimeUnit.MILLISECONDS; |
10 |
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import java.io.*; |
10 |
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|
11 |
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import java.util.ArrayList; |
12 |
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import java.util.Arrays; |
13 |
> |
import java.util.Collection; |
14 |
> |
import java.util.Iterator; |
15 |
> |
import java.util.NoSuchElementException; |
16 |
> |
import java.util.Queue; |
17 |
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import java.util.concurrent.BlockingQueue; |
18 |
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import java.util.concurrent.CountDownLatch; |
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import java.util.concurrent.Executors; |
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import java.util.concurrent.ExecutorService; |
21 |
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import java.util.concurrent.LinkedBlockingQueue; |
22 |
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|
23 |
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import junit.framework.Test; |
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|
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public class LinkedBlockingQueueTest extends JSR166TestCase { |
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|
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+ |
public static class Unbounded extends BlockingQueueTest { |
28 |
+ |
protected BlockingQueue emptyCollection() { |
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return new LinkedBlockingQueue(); |
30 |
+ |
} |
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} |
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+ |
|
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public static class Bounded extends BlockingQueueTest { |
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protected BlockingQueue emptyCollection() { |
35 |
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return new LinkedBlockingQueue(SIZE); |
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} |
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} |
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|
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public static void main(String[] args) { |
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junit.textui.TestRunner.run (suite()); |
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main(suite(), args); |
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} |
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|
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public static Test suite() { |
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return new TestSuite(LinkedBlockingQueueTest.class); |
44 |
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class Implementation implements CollectionImplementation { |
45 |
> |
public Class<?> klazz() { return LinkedBlockingQueue.class; } |
46 |
> |
public Collection emptyCollection() { return new LinkedBlockingQueue(); } |
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public Object makeElement(int i) { return i; } |
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> |
public boolean isConcurrent() { return true; } |
49 |
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public boolean permitsNulls() { return false; } |
50 |
> |
} |
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> |
return newTestSuite(LinkedBlockingQueueTest.class, |
52 |
> |
new Unbounded().testSuite(), |
53 |
> |
new Bounded().testSuite(), |
54 |
> |
CollectionTest.testSuite(new Implementation())); |
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} |
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|
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|
57 |
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/** |
58 |
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* Create a queue of given size containing consecutive |
59 |
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* Integers 0 ... n. |
60 |
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*/ |
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private LinkedBlockingQueue populatedQueue(int n) { |
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LinkedBlockingQueue q = new LinkedBlockingQueue(n); |
58 |
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* Returns a new queue of given size containing consecutive |
59 |
> |
* Integers 0 ... n - 1. |
60 |
> |
*/ |
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> |
private static LinkedBlockingQueue<Integer> populatedQueue(int n) { |
62 |
> |
LinkedBlockingQueue<Integer> q = |
63 |
> |
new LinkedBlockingQueue<Integer>(n); |
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assertTrue(q.isEmpty()); |
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for (int i = 0; i < n; i++) |
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assertTrue(q.offer(new Integer(i))); |
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assertFalse(q.isEmpty()); |
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assertEquals(0, q.remainingCapacity()); |
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assertEquals(n, q.size()); |
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assertEquals((Integer) 0, q.peek()); |
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return q; |
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} |
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|
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} |
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|
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/** |
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* Constructor throws IAE if capacity argument nonpositive |
84 |
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* Constructor throws IllegalArgumentException if capacity argument nonpositive |
85 |
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*/ |
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public void testConstructor2() { |
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try { |
88 |
< |
LinkedBlockingQueue q = new LinkedBlockingQueue(0); |
88 |
> |
new LinkedBlockingQueue(0); |
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shouldThrow(); |
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} catch (IllegalArgumentException success) {} |
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} |
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|
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/** |
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* Initializing from null Collection throws NPE |
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* Initializing from null Collection throws NullPointerException |
95 |
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*/ |
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public void testConstructor3() { |
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try { |
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LinkedBlockingQueue q = new LinkedBlockingQueue(null); |
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new LinkedBlockingQueue(null); |
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shouldThrow(); |
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} catch (NullPointerException success) {} |
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} |
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|
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/** |
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* Initializing from Collection of null elements throws NPE |
104 |
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* Initializing from Collection of null elements throws NullPointerException |
105 |
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*/ |
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public void testConstructor4() { |
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Collection<Integer> elements = Arrays.asList(new Integer[SIZE]); |
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try { |
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Integer[] ints = new Integer[SIZE]; |
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LinkedBlockingQueue q = new LinkedBlockingQueue(Arrays.asList(ints)); |
109 |
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new LinkedBlockingQueue(elements); |
110 |
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shouldThrow(); |
111 |
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} catch (NullPointerException success) {} |
112 |
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} |
113 |
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|
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/** |
115 |
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* Initializing from Collection with some null elements throws NPE |
115 |
> |
* Initializing from Collection with some null elements throws |
116 |
> |
* NullPointerException |
117 |
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*/ |
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public void testConstructor5() { |
119 |
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Integer[] ints = new Integer[SIZE]; |
120 |
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for (int i = 0; i < SIZE - 1; ++i) |
121 |
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ints[i] = new Integer(i); |
122 |
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Collection<Integer> elements = Arrays.asList(ints); |
123 |
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try { |
124 |
< |
Integer[] ints = new Integer[SIZE]; |
87 |
< |
for (int i = 0; i < SIZE-1; ++i) |
88 |
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ints[i] = new Integer(i); |
89 |
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LinkedBlockingQueue q = new LinkedBlockingQueue(Arrays.asList(ints)); |
124 |
> |
new LinkedBlockingQueue(elements); |
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shouldThrow(); |
126 |
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} catch (NullPointerException success) {} |
127 |
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} |
157 |
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* remainingCapacity decreases on add, increases on remove |
158 |
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*/ |
159 |
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public void testRemainingCapacity() { |
160 |
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LinkedBlockingQueue q = populatedQueue(SIZE); |
160 |
> |
BlockingQueue q = populatedQueue(SIZE); |
161 |
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for (int i = 0; i < SIZE; ++i) { |
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assertEquals(i, q.remainingCapacity()); |
163 |
< |
assertEquals(SIZE-i, q.size()); |
164 |
< |
q.remove(); |
163 |
> |
assertEquals(SIZE, q.size() + q.remainingCapacity()); |
164 |
> |
assertEquals(i, q.remove()); |
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} |
166 |
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for (int i = 0; i < SIZE; ++i) { |
167 |
< |
assertEquals(SIZE-i, q.remainingCapacity()); |
168 |
< |
assertEquals(i, q.size()); |
169 |
< |
q.add(new Integer(i)); |
167 |
> |
assertEquals(SIZE - i, q.remainingCapacity()); |
168 |
> |
assertEquals(SIZE, q.size() + q.remainingCapacity()); |
169 |
> |
assertTrue(q.add(i)); |
170 |
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} |
171 |
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} |
172 |
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|
173 |
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/** |
139 |
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* offer(null) throws NPE |
140 |
– |
*/ |
141 |
– |
public void testOfferNull() { |
142 |
– |
try { |
143 |
– |
LinkedBlockingQueue q = new LinkedBlockingQueue(1); |
144 |
– |
q.offer(null); |
145 |
– |
shouldThrow(); |
146 |
– |
} catch (NullPointerException success) {} |
147 |
– |
} |
148 |
– |
|
149 |
– |
/** |
150 |
– |
* add(null) throws NPE |
151 |
– |
*/ |
152 |
– |
public void testAddNull() { |
153 |
– |
try { |
154 |
– |
LinkedBlockingQueue q = new LinkedBlockingQueue(1); |
155 |
– |
q.add(null); |
156 |
– |
shouldThrow(); |
157 |
– |
} catch (NullPointerException success) {} |
158 |
– |
} |
159 |
– |
|
160 |
– |
/** |
174 |
|
* Offer succeeds if not full; fails if full |
175 |
|
*/ |
176 |
|
public void testOffer() { |
180 |
|
} |
181 |
|
|
182 |
|
/** |
183 |
< |
* add succeeds if not full; throws ISE if full |
183 |
> |
* add succeeds if not full; throws IllegalStateException if full |
184 |
|
*/ |
185 |
|
public void testAdd() { |
186 |
+ |
LinkedBlockingQueue q = new LinkedBlockingQueue(SIZE); |
187 |
+ |
for (int i = 0; i < SIZE; ++i) |
188 |
+ |
assertTrue(q.add(new Integer(i))); |
189 |
+ |
assertEquals(0, q.remainingCapacity()); |
190 |
|
try { |
174 |
– |
LinkedBlockingQueue q = new LinkedBlockingQueue(SIZE); |
175 |
– |
for (int i = 0; i < SIZE; ++i) { |
176 |
– |
assertTrue(q.add(new Integer(i))); |
177 |
– |
} |
178 |
– |
assertEquals(0, q.remainingCapacity()); |
191 |
|
q.add(new Integer(SIZE)); |
192 |
|
shouldThrow(); |
193 |
|
} catch (IllegalStateException success) {} |
194 |
|
} |
195 |
|
|
196 |
|
/** |
197 |
< |
* addAll(null) throws NPE |
186 |
< |
*/ |
187 |
< |
public void testAddAll1() { |
188 |
< |
try { |
189 |
< |
LinkedBlockingQueue q = new LinkedBlockingQueue(1); |
190 |
< |
q.addAll(null); |
191 |
< |
shouldThrow(); |
192 |
< |
} catch (NullPointerException success) {} |
193 |
< |
} |
194 |
< |
|
195 |
< |
/** |
196 |
< |
* addAll(this) throws IAE |
197 |
> |
* addAll(this) throws IllegalArgumentException |
198 |
|
*/ |
199 |
|
public void testAddAllSelf() { |
200 |
+ |
LinkedBlockingQueue q = populatedQueue(SIZE); |
201 |
|
try { |
200 |
– |
LinkedBlockingQueue q = populatedQueue(SIZE); |
202 |
|
q.addAll(q); |
203 |
|
shouldThrow(); |
204 |
|
} catch (IllegalArgumentException success) {} |
205 |
|
} |
206 |
|
|
207 |
|
/** |
207 |
– |
* addAll of a collection with null elements throws NPE |
208 |
– |
*/ |
209 |
– |
public void testAddAll2() { |
210 |
– |
try { |
211 |
– |
LinkedBlockingQueue q = new LinkedBlockingQueue(SIZE); |
212 |
– |
Integer[] ints = new Integer[SIZE]; |
213 |
– |
q.addAll(Arrays.asList(ints)); |
214 |
– |
shouldThrow(); |
215 |
– |
} catch (NullPointerException success) {} |
216 |
– |
} |
217 |
– |
/** |
208 |
|
* addAll of a collection with any null elements throws NPE after |
209 |
|
* possibly adding some elements |
210 |
|
*/ |
211 |
|
public void testAddAll3() { |
212 |
+ |
LinkedBlockingQueue q = new LinkedBlockingQueue(SIZE); |
213 |
+ |
Integer[] ints = new Integer[SIZE]; |
214 |
+ |
for (int i = 0; i < SIZE - 1; ++i) |
215 |
+ |
ints[i] = new Integer(i); |
216 |
+ |
Collection<Integer> elements = Arrays.asList(ints); |
217 |
|
try { |
218 |
< |
LinkedBlockingQueue q = new LinkedBlockingQueue(SIZE); |
224 |
< |
Integer[] ints = new Integer[SIZE]; |
225 |
< |
for (int i = 0; i < SIZE-1; ++i) |
226 |
< |
ints[i] = new Integer(i); |
227 |
< |
q.addAll(Arrays.asList(ints)); |
218 |
> |
q.addAll(elements); |
219 |
|
shouldThrow(); |
220 |
|
} catch (NullPointerException success) {} |
221 |
|
} |
222 |
+ |
|
223 |
|
/** |
224 |
< |
* addAll throws ISE if not enough room |
224 |
> |
* addAll throws IllegalStateException if not enough room |
225 |
|
*/ |
226 |
|
public void testAddAll4() { |
227 |
+ |
LinkedBlockingQueue q = new LinkedBlockingQueue(SIZE - 1); |
228 |
+ |
Integer[] ints = new Integer[SIZE]; |
229 |
+ |
for (int i = 0; i < SIZE; ++i) |
230 |
+ |
ints[i] = new Integer(i); |
231 |
+ |
Collection<Integer> elements = Arrays.asList(ints); |
232 |
|
try { |
233 |
< |
LinkedBlockingQueue q = new LinkedBlockingQueue(1); |
237 |
< |
Integer[] ints = new Integer[SIZE]; |
238 |
< |
for (int i = 0; i < SIZE; ++i) |
239 |
< |
ints[i] = new Integer(i); |
240 |
< |
q.addAll(Arrays.asList(ints)); |
233 |
> |
q.addAll(elements); |
234 |
|
shouldThrow(); |
235 |
|
} catch (IllegalStateException success) {} |
236 |
|
} |
237 |
+ |
|
238 |
|
/** |
239 |
|
* Queue contains all elements, in traversal order, of successful addAll |
240 |
|
*/ |
251 |
|
} |
252 |
|
|
253 |
|
/** |
260 |
– |
* put(null) throws NPE |
261 |
– |
*/ |
262 |
– |
public void testPutNull() throws InterruptedException { |
263 |
– |
try { |
264 |
– |
LinkedBlockingQueue q = new LinkedBlockingQueue(SIZE); |
265 |
– |
q.put(null); |
266 |
– |
shouldThrow(); |
267 |
– |
} catch (NullPointerException success) {} |
268 |
– |
} |
269 |
– |
|
270 |
– |
/** |
254 |
|
* all elements successfully put are contained |
255 |
|
*/ |
256 |
|
public void testPut() throws InterruptedException { |
257 |
|
LinkedBlockingQueue q = new LinkedBlockingQueue(SIZE); |
258 |
|
for (int i = 0; i < SIZE; ++i) { |
259 |
< |
Integer I = new Integer(i); |
260 |
< |
q.put(I); |
261 |
< |
assertTrue(q.contains(I)); |
259 |
> |
Integer x = new Integer(i); |
260 |
> |
q.put(x); |
261 |
> |
assertTrue(q.contains(x)); |
262 |
|
} |
263 |
|
assertEquals(0, q.remainingCapacity()); |
264 |
|
} |
267 |
|
* put blocks interruptibly if full |
268 |
|
*/ |
269 |
|
public void testBlockingPut() throws InterruptedException { |
270 |
< |
Thread t = new Thread(new CheckedRunnable() { |
271 |
< |
public void realRun() { |
272 |
< |
int added = 0; |
270 |
> |
final LinkedBlockingQueue q = new LinkedBlockingQueue(SIZE); |
271 |
> |
final CountDownLatch pleaseInterrupt = new CountDownLatch(1); |
272 |
> |
Thread t = newStartedThread(new CheckedRunnable() { |
273 |
> |
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 |
> |
|
279 |
> |
Thread.currentThread().interrupt(); |
280 |
|
try { |
281 |
< |
LinkedBlockingQueue q = new LinkedBlockingQueue(SIZE); |
282 |
< |
for (int i = 0; i < SIZE; ++i) { |
283 |
< |
q.put(new Integer(i)); |
284 |
< |
++added; |
285 |
< |
} |
286 |
< |
q.put(new Integer(SIZE)); |
287 |
< |
threadShouldThrow(); |
288 |
< |
} catch (InterruptedException success) { |
289 |
< |
threadAssertEquals(added, SIZE); |
290 |
< |
} |
281 |
> |
q.put(99); |
282 |
> |
shouldThrow(); |
283 |
> |
} catch (InterruptedException success) {} |
284 |
> |
assertFalse(Thread.interrupted()); |
285 |
> |
|
286 |
> |
pleaseInterrupt.countDown(); |
287 |
> |
try { |
288 |
> |
q.put(99); |
289 |
> |
shouldThrow(); |
290 |
> |
} catch (InterruptedException success) {} |
291 |
> |
assertFalse(Thread.interrupted()); |
292 |
|
}}); |
293 |
|
|
294 |
< |
t.start(); |
295 |
< |
Thread.sleep(SHORT_DELAY_MS); |
294 |
> |
await(pleaseInterrupt); |
295 |
> |
assertThreadBlocks(t, Thread.State.WAITING); |
296 |
|
t.interrupt(); |
297 |
< |
t.join(); |
297 |
> |
awaitTermination(t); |
298 |
> |
assertEquals(SIZE, q.size()); |
299 |
> |
assertEquals(0, q.remainingCapacity()); |
300 |
|
} |
301 |
|
|
302 |
|
/** |
303 |
< |
* put blocks waiting for take when full |
303 |
> |
* put blocks interruptibly waiting for take when full |
304 |
|
*/ |
305 |
|
public void testPutWithTake() throws InterruptedException { |
306 |
+ |
final int capacity = 2; |
307 |
|
final LinkedBlockingQueue q = new LinkedBlockingQueue(2); |
308 |
< |
Thread t = new Thread(new CheckedRunnable() { |
309 |
< |
public void realRun() { |
310 |
< |
int added = 0; |
308 |
> |
final CountDownLatch pleaseTake = new CountDownLatch(1); |
309 |
> |
final CountDownLatch pleaseInterrupt = new CountDownLatch(1); |
310 |
> |
Thread t = newStartedThread(new CheckedRunnable() { |
311 |
> |
public void realRun() throws InterruptedException { |
312 |
> |
for (int i = 0; i < capacity; i++) |
313 |
> |
q.put(i); |
314 |
> |
pleaseTake.countDown(); |
315 |
> |
q.put(86); |
316 |
> |
|
317 |
> |
pleaseInterrupt.countDown(); |
318 |
|
try { |
319 |
< |
q.put(new Object()); |
320 |
< |
++added; |
321 |
< |
q.put(new Object()); |
322 |
< |
++added; |
322 |
< |
q.put(new Object()); |
323 |
< |
++added; |
324 |
< |
q.put(new Object()); |
325 |
< |
++added; |
326 |
< |
threadShouldThrow(); |
327 |
< |
} catch (InterruptedException success) { |
328 |
< |
threadAssertTrue(added >= 2); |
329 |
< |
} |
319 |
> |
q.put(99); |
320 |
> |
shouldThrow(); |
321 |
> |
} catch (InterruptedException success) {} |
322 |
> |
assertFalse(Thread.interrupted()); |
323 |
|
}}); |
324 |
|
|
325 |
< |
t.start(); |
326 |
< |
Thread.sleep(SHORT_DELAY_MS); |
327 |
< |
q.take(); |
325 |
> |
await(pleaseTake); |
326 |
> |
assertEquals(0, q.remainingCapacity()); |
327 |
> |
assertEquals(0, q.take()); |
328 |
> |
|
329 |
> |
await(pleaseInterrupt); |
330 |
> |
assertThreadBlocks(t, Thread.State.WAITING); |
331 |
|
t.interrupt(); |
332 |
< |
t.join(); |
332 |
> |
awaitTermination(t); |
333 |
> |
assertEquals(0, q.remainingCapacity()); |
334 |
|
} |
335 |
|
|
336 |
|
/** |
337 |
|
* timed offer times out if full and elements not taken |
338 |
|
*/ |
339 |
< |
public void testTimedOffer() throws InterruptedException { |
339 |
> |
public void testTimedOffer() { |
340 |
|
final LinkedBlockingQueue q = new LinkedBlockingQueue(2); |
341 |
< |
Thread t = new ThreadShouldThrow(InterruptedException.class) { |
341 |
> |
final CountDownLatch pleaseInterrupt = new CountDownLatch(1); |
342 |
> |
Thread t = newStartedThread(new CheckedRunnable() { |
343 |
|
public void realRun() throws InterruptedException { |
344 |
|
q.put(new Object()); |
345 |
|
q.put(new Object()); |
346 |
< |
threadAssertFalse(q.offer(new Object(), SHORT_DELAY_MS, MILLISECONDS)); |
347 |
< |
q.offer(new Object(), LONG_DELAY_MS, MILLISECONDS); |
348 |
< |
}}; |
346 |
> |
long startTime = System.nanoTime(); |
347 |
> |
assertFalse(q.offer(new Object(), timeoutMillis(), MILLISECONDS)); |
348 |
> |
assertTrue(millisElapsedSince(startTime) >= timeoutMillis()); |
349 |
> |
pleaseInterrupt.countDown(); |
350 |
> |
try { |
351 |
> |
q.offer(new Object(), 2 * LONG_DELAY_MS, MILLISECONDS); |
352 |
> |
shouldThrow(); |
353 |
> |
} catch (InterruptedException success) {} |
354 |
> |
assertFalse(Thread.interrupted()); |
355 |
> |
}}); |
356 |
|
|
357 |
< |
t.start(); |
358 |
< |
Thread.sleep(SMALL_DELAY_MS); |
357 |
> |
await(pleaseInterrupt); |
358 |
> |
assertThreadBlocks(t, Thread.State.TIMED_WAITING); |
359 |
|
t.interrupt(); |
360 |
< |
t.join(); |
360 |
> |
awaitTermination(t); |
361 |
|
} |
362 |
|
|
363 |
|
/** |
366 |
|
public void testTake() throws InterruptedException { |
367 |
|
LinkedBlockingQueue q = populatedQueue(SIZE); |
368 |
|
for (int i = 0; i < SIZE; ++i) { |
369 |
< |
assertEquals(i, ((Integer)q.take()).intValue()); |
369 |
> |
assertEquals(i, q.take()); |
370 |
|
} |
371 |
|
} |
372 |
|
|
373 |
|
/** |
369 |
– |
* take blocks interruptibly when empty |
370 |
– |
*/ |
371 |
– |
public void testTakeFromEmpty() throws InterruptedException { |
372 |
– |
final LinkedBlockingQueue q = new LinkedBlockingQueue(2); |
373 |
– |
Thread t = new ThreadShouldThrow(InterruptedException.class) { |
374 |
– |
public void realRun() throws InterruptedException { |
375 |
– |
q.take(); |
376 |
– |
}}; |
377 |
– |
|
378 |
– |
t.start(); |
379 |
– |
Thread.sleep(SHORT_DELAY_MS); |
380 |
– |
t.interrupt(); |
381 |
– |
t.join(); |
382 |
– |
} |
383 |
– |
|
384 |
– |
/** |
374 |
|
* Take removes existing elements until empty, then blocks interruptibly |
375 |
|
*/ |
376 |
|
public void testBlockingTake() throws InterruptedException { |
377 |
< |
Thread t = new ThreadShouldThrow(InterruptedException.class) { |
377 |
> |
final BlockingQueue q = populatedQueue(SIZE); |
378 |
> |
final CountDownLatch pleaseInterrupt = new CountDownLatch(1); |
379 |
> |
Thread t = newStartedThread(new CheckedRunnable() { |
380 |
|
public void realRun() throws InterruptedException { |
381 |
< |
LinkedBlockingQueue q = populatedQueue(SIZE); |
391 |
< |
for (int i = 0; i < SIZE; ++i) { |
392 |
< |
assertEquals(i, ((Integer)q.take()).intValue()); |
393 |
< |
} |
394 |
< |
q.take(); |
395 |
< |
}}; |
381 |
> |
for (int i = 0; i < SIZE; i++) assertEquals(i, q.take()); |
382 |
|
|
383 |
< |
t.start(); |
384 |
< |
Thread.sleep(SHORT_DELAY_MS); |
383 |
> |
Thread.currentThread().interrupt(); |
384 |
> |
try { |
385 |
> |
q.take(); |
386 |
> |
shouldThrow(); |
387 |
> |
} catch (InterruptedException success) {} |
388 |
> |
assertFalse(Thread.interrupted()); |
389 |
> |
|
390 |
> |
pleaseInterrupt.countDown(); |
391 |
> |
try { |
392 |
> |
q.take(); |
393 |
> |
shouldThrow(); |
394 |
> |
} catch (InterruptedException success) {} |
395 |
> |
assertFalse(Thread.interrupted()); |
396 |
> |
}}); |
397 |
> |
|
398 |
> |
await(pleaseInterrupt); |
399 |
> |
assertThreadBlocks(t, Thread.State.WAITING); |
400 |
|
t.interrupt(); |
401 |
< |
t.join(); |
401 |
> |
awaitTermination(t); |
402 |
|
} |
403 |
|
|
403 |
– |
|
404 |
|
/** |
405 |
|
* poll succeeds unless empty |
406 |
|
*/ |
407 |
|
public void testPoll() { |
408 |
|
LinkedBlockingQueue q = populatedQueue(SIZE); |
409 |
|
for (int i = 0; i < SIZE; ++i) { |
410 |
< |
assertEquals(i, ((Integer)q.poll()).intValue()); |
410 |
> |
assertEquals(i, q.poll()); |
411 |
|
} |
412 |
|
assertNull(q.poll()); |
413 |
|
} |
414 |
|
|
415 |
|
/** |
416 |
< |
* timed pool with zero timeout succeeds when non-empty, else times out |
416 |
> |
* timed poll with zero timeout succeeds when non-empty, else times out |
417 |
|
*/ |
418 |
|
public void testTimedPoll0() throws InterruptedException { |
419 |
|
LinkedBlockingQueue q = populatedQueue(SIZE); |
420 |
|
for (int i = 0; i < SIZE; ++i) { |
421 |
< |
assertEquals(i, ((Integer)q.poll(0, MILLISECONDS)).intValue()); |
421 |
> |
assertEquals(i, q.poll(0, MILLISECONDS)); |
422 |
|
} |
423 |
|
assertNull(q.poll(0, MILLISECONDS)); |
424 |
|
} |
425 |
|
|
426 |
|
/** |
427 |
< |
* timed pool with nonzero timeout succeeds when non-empty, else times out |
427 |
> |
* timed poll with nonzero timeout succeeds when non-empty, else times out |
428 |
|
*/ |
429 |
|
public void testTimedPoll() throws InterruptedException { |
430 |
< |
LinkedBlockingQueue q = populatedQueue(SIZE); |
430 |
> |
LinkedBlockingQueue<Integer> q = populatedQueue(SIZE); |
431 |
|
for (int i = 0; i < SIZE; ++i) { |
432 |
< |
assertEquals(i, ((Integer)q.poll(SHORT_DELAY_MS, MILLISECONDS)).intValue()); |
433 |
< |
} |
434 |
< |
assertNull(q.poll(SHORT_DELAY_MS, MILLISECONDS)); |
432 |
> |
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 |
|
} |
441 |
|
|
442 |
|
/** |
444 |
|
* returning timeout status |
445 |
|
*/ |
446 |
|
public void testInterruptedTimedPoll() throws InterruptedException { |
447 |
< |
Thread t = new ThreadShouldThrow(InterruptedException.class) { |
447 |
> |
final BlockingQueue<Integer> q = populatedQueue(SIZE); |
448 |
> |
final CountDownLatch pleaseInterrupt = new CountDownLatch(1); |
449 |
> |
Thread t = newStartedThread(new CheckedRunnable() { |
450 |
|
public void realRun() throws InterruptedException { |
451 |
< |
LinkedBlockingQueue q = populatedQueue(SIZE); |
451 |
> |
long startTime = System.nanoTime(); |
452 |
|
for (int i = 0; i < SIZE; ++i) { |
453 |
< |
threadAssertEquals(i, ((Integer)q.poll(SHORT_DELAY_MS, MILLISECONDS)).intValue()); |
453 |
> |
assertEquals(i, (int) q.poll(LONG_DELAY_MS, MILLISECONDS)); |
454 |
|
} |
448 |
– |
q.poll(SMALL_DELAY_MS, MILLISECONDS); |
449 |
– |
}}; |
455 |
|
|
456 |
< |
t.start(); |
457 |
< |
Thread.sleep(SHORT_DELAY_MS); |
458 |
< |
t.interrupt(); |
459 |
< |
t.join(); |
460 |
< |
} |
456 |
> |
pleaseInterrupt.countDown(); |
457 |
> |
try { |
458 |
> |
q.poll(LONG_DELAY_MS, MILLISECONDS); |
459 |
> |
shouldThrow(); |
460 |
> |
} catch (InterruptedException success) {} |
461 |
> |
assertFalse(Thread.interrupted()); |
462 |
|
|
463 |
< |
/** |
464 |
< |
* timed poll before a delayed offer fails; after offer succeeds; |
459 |
< |
* on interruption throws |
460 |
< |
*/ |
461 |
< |
public void testTimedPollWithOffer() throws InterruptedException { |
462 |
< |
final LinkedBlockingQueue q = new LinkedBlockingQueue(2); |
463 |
< |
Thread t = new ThreadShouldThrow(InterruptedException.class) { |
464 |
< |
public void realRun() throws InterruptedException { |
465 |
< |
threadAssertNull(q.poll(SHORT_DELAY_MS, MILLISECONDS)); |
466 |
< |
q.poll(LONG_DELAY_MS, MILLISECONDS); |
467 |
< |
q.poll(LONG_DELAY_MS, MILLISECONDS); |
468 |
< |
}}; |
463 |
> |
assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS); |
464 |
> |
}}); |
465 |
|
|
466 |
< |
t.start(); |
467 |
< |
Thread.sleep(SMALL_DELAY_MS); |
472 |
< |
assertTrue(q.offer(zero, SHORT_DELAY_MS, MILLISECONDS)); |
466 |
> |
await(pleaseInterrupt); |
467 |
> |
assertThreadBlocks(t, Thread.State.TIMED_WAITING); |
468 |
|
t.interrupt(); |
469 |
< |
t.join(); |
469 |
> |
awaitTermination(t); |
470 |
> |
checkEmpty(q); |
471 |
|
} |
472 |
|
|
473 |
|
/** |
476 |
|
public void testPeek() { |
477 |
|
LinkedBlockingQueue q = populatedQueue(SIZE); |
478 |
|
for (int i = 0; i < SIZE; ++i) { |
479 |
< |
assertEquals(i, ((Integer)q.peek()).intValue()); |
480 |
< |
q.poll(); |
479 |
> |
assertEquals(i, q.peek()); |
480 |
> |
assertEquals(i, q.poll()); |
481 |
|
assertTrue(q.peek() == null || |
482 |
< |
i != ((Integer)q.peek()).intValue()); |
482 |
> |
!q.peek().equals(i)); |
483 |
|
} |
484 |
|
assertNull(q.peek()); |
485 |
|
} |
490 |
|
public void testElement() { |
491 |
|
LinkedBlockingQueue q = populatedQueue(SIZE); |
492 |
|
for (int i = 0; i < SIZE; ++i) { |
493 |
< |
assertEquals(i, ((Integer)q.element()).intValue()); |
494 |
< |
q.poll(); |
493 |
> |
assertEquals(i, q.element()); |
494 |
> |
assertEquals(i, q.poll()); |
495 |
|
} |
496 |
|
try { |
497 |
|
q.element(); |
505 |
|
public void testRemove() { |
506 |
|
LinkedBlockingQueue q = populatedQueue(SIZE); |
507 |
|
for (int i = 0; i < SIZE; ++i) { |
508 |
< |
assertEquals(i, ((Integer)q.remove()).intValue()); |
508 |
> |
assertEquals(i, q.remove()); |
509 |
|
} |
510 |
|
try { |
511 |
|
q.remove(); |
514 |
|
} |
515 |
|
|
516 |
|
/** |
521 |
– |
* remove(x) removes x and returns true if present |
522 |
– |
*/ |
523 |
– |
public void testRemoveElement() { |
524 |
– |
LinkedBlockingQueue q = populatedQueue(SIZE); |
525 |
– |
for (int i = 1; i < SIZE; i+=2) { |
526 |
– |
assertTrue(q.remove(new Integer(i))); |
527 |
– |
} |
528 |
– |
for (int i = 0; i < SIZE; i+=2) { |
529 |
– |
assertTrue(q.remove(new Integer(i))); |
530 |
– |
assertFalse(q.remove(new Integer(i+1))); |
531 |
– |
} |
532 |
– |
assertTrue(q.isEmpty()); |
533 |
– |
} |
534 |
– |
|
535 |
– |
/** |
517 |
|
* An add following remove(x) succeeds |
518 |
|
*/ |
519 |
|
public void testRemoveElementAndAdd() throws InterruptedException { |
523 |
|
assertTrue(q.remove(new Integer(1))); |
524 |
|
assertTrue(q.remove(new Integer(2))); |
525 |
|
assertTrue(q.add(new Integer(3))); |
526 |
< |
assertTrue(q.take() != null); |
526 |
> |
assertNotNull(q.take()); |
527 |
|
} |
528 |
|
|
529 |
|
/** |
582 |
|
assertTrue(changed); |
583 |
|
|
584 |
|
assertTrue(q.containsAll(p)); |
585 |
< |
assertEquals(SIZE-i, q.size()); |
585 |
> |
assertEquals(SIZE - i, q.size()); |
586 |
|
p.remove(); |
587 |
|
} |
588 |
|
} |
595 |
|
LinkedBlockingQueue q = populatedQueue(SIZE); |
596 |
|
LinkedBlockingQueue p = populatedQueue(i); |
597 |
|
assertTrue(q.removeAll(p)); |
598 |
< |
assertEquals(SIZE-i, q.size()); |
598 |
> |
assertEquals(SIZE - i, q.size()); |
599 |
|
for (int j = 0; j < i; ++j) { |
600 |
< |
Integer I = (Integer)(p.remove()); |
601 |
< |
assertFalse(q.contains(I)); |
600 |
> |
Integer x = (Integer)(p.remove()); |
601 |
> |
assertFalse(q.contains(x)); |
602 |
|
} |
603 |
|
} |
604 |
|
} |
605 |
|
|
606 |
|
/** |
607 |
< |
* toArray contains all elements |
607 |
> |
* toArray contains all elements in FIFO order |
608 |
|
*/ |
609 |
< |
public void testToArray() throws InterruptedException { |
609 |
> |
public void testToArray() { |
610 |
|
LinkedBlockingQueue q = populatedQueue(SIZE); |
611 |
|
Object[] o = q.toArray(); |
612 |
|
for (int i = 0; i < o.length; i++) |
613 |
< |
assertEquals(o[i], q.take()); |
613 |
> |
assertSame(o[i], q.poll()); |
614 |
|
} |
615 |
|
|
616 |
|
/** |
617 |
< |
* toArray(a) contains all elements |
617 |
> |
* toArray(a) contains all elements in FIFO order |
618 |
|
*/ |
619 |
|
public void testToArray2() throws InterruptedException { |
620 |
< |
LinkedBlockingQueue q = populatedQueue(SIZE); |
620 |
> |
LinkedBlockingQueue<Integer> q = populatedQueue(SIZE); |
621 |
|
Integer[] ints = new Integer[SIZE]; |
622 |
< |
ints = (Integer[])q.toArray(ints); |
622 |
> |
Integer[] array = q.toArray(ints); |
623 |
> |
assertSame(ints, array); |
624 |
|
for (int i = 0; i < ints.length; i++) |
625 |
< |
assertEquals(ints[i], q.take()); |
644 |
< |
} |
645 |
< |
|
646 |
< |
/** |
647 |
< |
* toArray(null) throws NPE |
648 |
< |
*/ |
649 |
< |
public void testToArray_BadArg() { |
650 |
< |
try { |
651 |
< |
LinkedBlockingQueue q = populatedQueue(SIZE); |
652 |
< |
Object o[] = q.toArray(null); |
653 |
< |
shouldThrow(); |
654 |
< |
} catch (NullPointerException success) {} |
625 |
> |
assertSame(ints[i], q.poll()); |
626 |
|
} |
627 |
|
|
628 |
|
/** |
629 |
< |
* toArray with incompatible array type throws CCE |
629 |
> |
* toArray(incompatible array type) throws ArrayStoreException |
630 |
|
*/ |
631 |
|
public void testToArray1_BadArg() { |
632 |
+ |
LinkedBlockingQueue q = populatedQueue(SIZE); |
633 |
|
try { |
634 |
< |
LinkedBlockingQueue q = populatedQueue(SIZE); |
663 |
< |
Object o[] = q.toArray(new String[10] ); |
634 |
> |
q.toArray(new String[10]); |
635 |
|
shouldThrow(); |
636 |
|
} catch (ArrayStoreException success) {} |
637 |
|
} |
638 |
|
|
668 |
– |
|
639 |
|
/** |
640 |
|
* iterator iterates through all elements |
641 |
|
*/ |
642 |
|
public void testIterator() throws InterruptedException { |
643 |
|
LinkedBlockingQueue q = populatedQueue(SIZE); |
644 |
|
Iterator it = q.iterator(); |
645 |
< |
while (it.hasNext()) { |
645 |
> |
int i; |
646 |
> |
for (i = 0; it.hasNext(); i++) |
647 |
> |
assertTrue(q.contains(it.next())); |
648 |
> |
assertEquals(i, SIZE); |
649 |
> |
assertIteratorExhausted(it); |
650 |
> |
|
651 |
> |
it = q.iterator(); |
652 |
> |
for (i = 0; it.hasNext(); i++) |
653 |
|
assertEquals(it.next(), q.take()); |
654 |
< |
} |
654 |
> |
assertEquals(i, SIZE); |
655 |
> |
assertIteratorExhausted(it); |
656 |
> |
} |
657 |
> |
|
658 |
> |
/** |
659 |
> |
* iterator of empty collection has no elements |
660 |
> |
*/ |
661 |
> |
public void testEmptyIterator() { |
662 |
> |
assertIteratorExhausted(new LinkedBlockingQueue().iterator()); |
663 |
|
} |
664 |
|
|
665 |
|
/** |
666 |
|
* iterator.remove removes current element |
667 |
|
*/ |
668 |
< |
public void testIteratorRemove () { |
668 |
> |
public void testIteratorRemove() { |
669 |
|
final LinkedBlockingQueue q = new LinkedBlockingQueue(3); |
670 |
|
q.add(two); |
671 |
|
q.add(one); |
676 |
|
it.remove(); |
677 |
|
|
678 |
|
it = q.iterator(); |
679 |
< |
assertEquals(it.next(), one); |
680 |
< |
assertEquals(it.next(), three); |
679 |
> |
assertSame(it.next(), one); |
680 |
> |
assertSame(it.next(), three); |
681 |
|
assertFalse(it.hasNext()); |
682 |
|
} |
683 |
|
|
699 |
– |
|
684 |
|
/** |
685 |
|
* iterator ordering is FIFO |
686 |
|
*/ |
692 |
|
assertEquals(0, q.remainingCapacity()); |
693 |
|
int k = 0; |
694 |
|
for (Iterator it = q.iterator(); it.hasNext();) { |
695 |
< |
int i = ((Integer)(it.next())).intValue(); |
712 |
< |
assertEquals(++k, i); |
695 |
> |
assertEquals(++k, it.next()); |
696 |
|
} |
697 |
|
assertEquals(3, k); |
698 |
|
} |
700 |
|
/** |
701 |
|
* Modifications do not cause iterators to fail |
702 |
|
*/ |
703 |
< |
public void testWeaklyConsistentIteration () { |
703 |
> |
public void testWeaklyConsistentIteration() { |
704 |
|
final LinkedBlockingQueue q = new LinkedBlockingQueue(3); |
705 |
|
q.add(one); |
706 |
|
q.add(two); |
712 |
|
assertEquals(0, q.size()); |
713 |
|
} |
714 |
|
|
732 |
– |
|
715 |
|
/** |
716 |
|
* toString contains toStrings of elements |
717 |
|
*/ |
719 |
|
LinkedBlockingQueue q = populatedQueue(SIZE); |
720 |
|
String s = q.toString(); |
721 |
|
for (int i = 0; i < SIZE; ++i) { |
722 |
< |
assertTrue(s.indexOf(String.valueOf(i)) >= 0); |
722 |
> |
assertTrue(s.contains(String.valueOf(i))); |
723 |
|
} |
724 |
|
} |
725 |
|
|
744 |
– |
|
726 |
|
/** |
727 |
|
* offer transfers elements across Executor tasks |
728 |
|
*/ |
730 |
|
final LinkedBlockingQueue q = new LinkedBlockingQueue(2); |
731 |
|
q.add(one); |
732 |
|
q.add(two); |
733 |
< |
ExecutorService executor = Executors.newFixedThreadPool(2); |
734 |
< |
executor.execute(new CheckedRunnable() { |
735 |
< |
public void realRun() throws InterruptedException { |
736 |
< |
threadAssertFalse(q.offer(three)); |
737 |
< |
threadAssertTrue(q.offer(three, MEDIUM_DELAY_MS, MILLISECONDS)); |
738 |
< |
threadAssertEquals(0, q.remainingCapacity()); |
739 |
< |
}}); |
740 |
< |
|
741 |
< |
executor.execute(new CheckedRunnable() { |
742 |
< |
public void realRun() throws InterruptedException { |
743 |
< |
Thread.sleep(SMALL_DELAY_MS); |
744 |
< |
threadAssertEquals(one, q.take()); |
745 |
< |
}}); |
746 |
< |
|
747 |
< |
joinPool(executor); |
733 |
> |
final CheckedBarrier threadsStarted = new CheckedBarrier(2); |
734 |
> |
final ExecutorService executor = Executors.newFixedThreadPool(2); |
735 |
> |
try (PoolCleaner cleaner = cleaner(executor)) { |
736 |
> |
executor.execute(new CheckedRunnable() { |
737 |
> |
public void realRun() throws InterruptedException { |
738 |
> |
assertFalse(q.offer(three)); |
739 |
> |
threadsStarted.await(); |
740 |
> |
assertTrue(q.offer(three, LONG_DELAY_MS, MILLISECONDS)); |
741 |
> |
assertEquals(0, q.remainingCapacity()); |
742 |
> |
}}); |
743 |
> |
|
744 |
> |
executor.execute(new CheckedRunnable() { |
745 |
> |
public void realRun() throws InterruptedException { |
746 |
> |
threadsStarted.await(); |
747 |
> |
assertSame(one, q.take()); |
748 |
> |
}}); |
749 |
> |
} |
750 |
|
} |
751 |
|
|
752 |
|
/** |
753 |
< |
* poll retrieves elements across Executor threads |
753 |
> |
* timed poll retrieves elements across Executor threads |
754 |
|
*/ |
755 |
|
public void testPollInExecutor() { |
756 |
|
final LinkedBlockingQueue q = new LinkedBlockingQueue(2); |
757 |
< |
ExecutorService executor = Executors.newFixedThreadPool(2); |
758 |
< |
executor.execute(new CheckedRunnable() { |
759 |
< |
public void realRun() throws InterruptedException { |
760 |
< |
threadAssertNull(q.poll()); |
761 |
< |
threadAssertTrue(null != q.poll(MEDIUM_DELAY_MS, MILLISECONDS)); |
762 |
< |
threadAssertTrue(q.isEmpty()); |
763 |
< |
}}); |
764 |
< |
|
765 |
< |
executor.execute(new CheckedRunnable() { |
766 |
< |
public void realRun() throws InterruptedException { |
767 |
< |
Thread.sleep(SMALL_DELAY_MS); |
768 |
< |
q.put(one); |
769 |
< |
}}); |
770 |
< |
|
771 |
< |
joinPool(executor); |
757 |
> |
final CheckedBarrier threadsStarted = new CheckedBarrier(2); |
758 |
> |
final ExecutorService executor = Executors.newFixedThreadPool(2); |
759 |
> |
try (PoolCleaner cleaner = cleaner(executor)) { |
760 |
> |
executor.execute(new CheckedRunnable() { |
761 |
> |
public void realRun() throws InterruptedException { |
762 |
> |
assertNull(q.poll()); |
763 |
> |
threadsStarted.await(); |
764 |
> |
assertSame(one, q.poll(LONG_DELAY_MS, MILLISECONDS)); |
765 |
> |
checkEmpty(q); |
766 |
> |
}}); |
767 |
> |
|
768 |
> |
executor.execute(new CheckedRunnable() { |
769 |
> |
public void realRun() throws InterruptedException { |
770 |
> |
threadsStarted.await(); |
771 |
> |
q.put(one); |
772 |
> |
}}); |
773 |
> |
} |
774 |
|
} |
775 |
|
|
776 |
|
/** |
777 |
|
* A deserialized serialized queue has same elements in same order |
778 |
|
*/ |
779 |
|
public void testSerialization() throws Exception { |
780 |
< |
LinkedBlockingQueue q = populatedQueue(SIZE); |
781 |
< |
|
797 |
< |
ByteArrayOutputStream bout = new ByteArrayOutputStream(10000); |
798 |
< |
ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout)); |
799 |
< |
out.writeObject(q); |
800 |
< |
out.close(); |
801 |
< |
|
802 |
< |
ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray()); |
803 |
< |
ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin)); |
804 |
< |
LinkedBlockingQueue r = (LinkedBlockingQueue)in.readObject(); |
805 |
< |
assertEquals(q.size(), r.size()); |
806 |
< |
while (!q.isEmpty()) |
807 |
< |
assertEquals(q.remove(), r.remove()); |
808 |
< |
} |
809 |
< |
|
810 |
< |
/** |
811 |
< |
* drainTo(null) throws NPE |
812 |
< |
*/ |
813 |
< |
public void testDrainToNull() { |
814 |
< |
LinkedBlockingQueue q = populatedQueue(SIZE); |
815 |
< |
try { |
816 |
< |
q.drainTo(null); |
817 |
< |
shouldThrow(); |
818 |
< |
} catch (NullPointerException success) {} |
819 |
< |
} |
780 |
> |
Queue x = populatedQueue(SIZE); |
781 |
> |
Queue y = serialClone(x); |
782 |
|
|
783 |
< |
/** |
784 |
< |
* drainTo(this) throws IAE |
785 |
< |
*/ |
786 |
< |
public void testDrainToSelf() { |
787 |
< |
LinkedBlockingQueue q = populatedQueue(SIZE); |
788 |
< |
try { |
789 |
< |
q.drainTo(q); |
790 |
< |
shouldThrow(); |
791 |
< |
} catch (IllegalArgumentException success) {} |
783 |
> |
assertNotSame(x, y); |
784 |
> |
assertEquals(x.size(), y.size()); |
785 |
> |
assertEquals(x.toString(), y.toString()); |
786 |
> |
assertTrue(Arrays.equals(x.toArray(), y.toArray())); |
787 |
> |
while (!x.isEmpty()) { |
788 |
> |
assertFalse(y.isEmpty()); |
789 |
> |
assertEquals(x.remove(), y.remove()); |
790 |
> |
} |
791 |
> |
assertTrue(y.isEmpty()); |
792 |
|
} |
793 |
|
|
794 |
|
/** |
798 |
|
LinkedBlockingQueue q = populatedQueue(SIZE); |
799 |
|
ArrayList l = new ArrayList(); |
800 |
|
q.drainTo(l); |
801 |
< |
assertEquals(q.size(), 0); |
802 |
< |
assertEquals(l.size(), SIZE); |
801 |
> |
assertEquals(0, q.size()); |
802 |
> |
assertEquals(SIZE, l.size()); |
803 |
|
for (int i = 0; i < SIZE; ++i) |
804 |
|
assertEquals(l.get(i), new Integer(i)); |
805 |
|
q.add(zero); |
809 |
|
assertTrue(q.contains(one)); |
810 |
|
l.clear(); |
811 |
|
q.drainTo(l); |
812 |
< |
assertEquals(q.size(), 0); |
813 |
< |
assertEquals(l.size(), 2); |
812 |
> |
assertEquals(0, q.size()); |
813 |
> |
assertEquals(2, l.size()); |
814 |
|
for (int i = 0; i < 2; ++i) |
815 |
|
assertEquals(l.get(i), new Integer(i)); |
816 |
|
} |
822 |
|
final LinkedBlockingQueue q = populatedQueue(SIZE); |
823 |
|
Thread t = new Thread(new CheckedRunnable() { |
824 |
|
public void realRun() throws InterruptedException { |
825 |
< |
q.put(new Integer(SIZE+1)); |
825 |
> |
q.put(new Integer(SIZE + 1)); |
826 |
|
}}); |
827 |
|
|
828 |
|
t.start(); |
836 |
|
} |
837 |
|
|
838 |
|
/** |
839 |
< |
* drainTo(null, n) throws NPE |
878 |
< |
*/ |
879 |
< |
public void testDrainToNullN() { |
880 |
< |
LinkedBlockingQueue q = populatedQueue(SIZE); |
881 |
< |
try { |
882 |
< |
q.drainTo(null, 0); |
883 |
< |
shouldThrow(); |
884 |
< |
} catch (NullPointerException success) {} |
885 |
< |
} |
886 |
< |
|
887 |
< |
/** |
888 |
< |
* drainTo(this, n) throws IAE |
889 |
< |
*/ |
890 |
< |
public void testDrainToSelfN() { |
891 |
< |
LinkedBlockingQueue q = populatedQueue(SIZE); |
892 |
< |
try { |
893 |
< |
q.drainTo(q, 0); |
894 |
< |
shouldThrow(); |
895 |
< |
} catch (IllegalArgumentException success) {} |
896 |
< |
} |
897 |
< |
|
898 |
< |
/** |
899 |
< |
* drainTo(c, n) empties first max {n, size} elements of queue into c |
839 |
> |
* drainTo(c, n) empties first min(n, size) elements of queue into c |
840 |
|
*/ |
841 |
|
public void testDrainToN() { |
842 |
|
LinkedBlockingQueue q = new LinkedBlockingQueue(); |
845 |
|
assertTrue(q.offer(new Integer(j))); |
846 |
|
ArrayList l = new ArrayList(); |
847 |
|
q.drainTo(l, i); |
848 |
< |
int k = (i < SIZE)? i : SIZE; |
849 |
< |
assertEquals(l.size(), k); |
850 |
< |
assertEquals(q.size(), SIZE-k); |
848 |
> |
int k = (i < SIZE) ? i : SIZE; |
849 |
> |
assertEquals(k, l.size()); |
850 |
> |
assertEquals(SIZE - k, q.size()); |
851 |
|
for (int j = 0; j < k; ++j) |
852 |
|
assertEquals(l.get(j), new Integer(j)); |
853 |
< |
while (q.poll() != null) ; |
853 |
> |
do {} while (q.poll() != null); |
854 |
> |
} |
855 |
> |
} |
856 |
> |
|
857 |
> |
/** |
858 |
> |
* remove(null), contains(null) always return false |
859 |
> |
*/ |
860 |
> |
public void testNeverContainsNull() { |
861 |
> |
Collection<?>[] qs = { |
862 |
> |
new LinkedBlockingQueue<Object>(), |
863 |
> |
populatedQueue(2), |
864 |
> |
}; |
865 |
> |
|
866 |
> |
for (Collection<?> q : qs) { |
867 |
> |
assertFalse(q.contains(null)); |
868 |
> |
assertFalse(q.remove(null)); |
869 |
|
} |
870 |
|
} |
871 |
|
|