1 |
/* |
2 |
* Written by Doug Lea with assistance from members of JCP JSR-166 |
3 |
* Expert Group and released to the public domain, as explained at |
4 |
* http://creativecommons.org/licenses/publicdomain |
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* Other contributors include Andrew Wright, Jeffrey Hayes, |
6 |
* Pat Fisher, Mike Judd. |
7 |
*/ |
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|
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import junit.framework.*; |
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import java.util.*; |
11 |
import static java.util.concurrent.TimeUnit.MILLISECONDS; |
12 |
import java.util.concurrent.*; |
13 |
|
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public class DelayQueueTest extends JSR166TestCase { |
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public static void main(String[] args) { |
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junit.textui.TestRunner.run (suite()); |
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} |
18 |
|
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public static Test suite() { |
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return new TestSuite(DelayQueueTest.class); |
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} |
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|
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private static final int NOCAP = Integer.MAX_VALUE; |
24 |
|
25 |
/** |
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* A delayed implementation for testing. |
27 |
* Most tests use Pseudodelays, where delays are all elapsed |
28 |
* (so, no blocking solely for delays) but are still ordered |
29 |
*/ |
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static class PDelay implements Delayed { |
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int pseudodelay; |
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PDelay(int i) { pseudodelay = Integer.MIN_VALUE + i; } |
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public int compareTo(PDelay y) { |
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int i = pseudodelay; |
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int j = ((PDelay)y).pseudodelay; |
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if (i < j) return -1; |
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if (i > j) return 1; |
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return 0; |
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} |
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|
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public int compareTo(Delayed y) { |
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int i = pseudodelay; |
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int j = ((PDelay)y).pseudodelay; |
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if (i < j) return -1; |
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if (i > j) return 1; |
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return 0; |
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} |
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|
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public boolean equals(Object other) { |
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return ((PDelay)other).pseudodelay == pseudodelay; |
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} |
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public boolean equals(PDelay other) { |
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return ((PDelay)other).pseudodelay == pseudodelay; |
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} |
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|
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|
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public long getDelay(TimeUnit ignore) { |
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return pseudodelay; |
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} |
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public int intValue() { |
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return pseudodelay; |
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} |
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|
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public String toString() { |
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return String.valueOf(pseudodelay); |
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} |
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} |
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|
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|
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/** |
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* Delayed implementation that actually delays |
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*/ |
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static class NanoDelay implements Delayed { |
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long trigger; |
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NanoDelay(long i) { |
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trigger = System.nanoTime() + i; |
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} |
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public int compareTo(NanoDelay y) { |
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long i = trigger; |
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long j = ((NanoDelay)y).trigger; |
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if (i < j) return -1; |
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if (i > j) return 1; |
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return 0; |
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} |
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|
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public int compareTo(Delayed y) { |
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long i = trigger; |
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long j = ((NanoDelay)y).trigger; |
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if (i < j) return -1; |
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if (i > j) return 1; |
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return 0; |
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} |
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|
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public boolean equals(Object other) { |
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return ((NanoDelay)other).trigger == trigger; |
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} |
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public boolean equals(NanoDelay other) { |
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return ((NanoDelay)other).trigger == trigger; |
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} |
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|
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public long getDelay(TimeUnit unit) { |
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long n = trigger - System.nanoTime(); |
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return unit.convert(n, TimeUnit.NANOSECONDS); |
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} |
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|
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public long getTriggerTime() { |
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return trigger; |
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} |
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|
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public String toString() { |
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return String.valueOf(trigger); |
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} |
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} |
114 |
|
115 |
|
116 |
/** |
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* Create a queue of given size containing consecutive |
118 |
* PDelays 0 ... n. |
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*/ |
120 |
private DelayQueue populatedQueue(int n) { |
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DelayQueue q = new DelayQueue(); |
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assertTrue(q.isEmpty()); |
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for (int i = n-1; i >= 0; i-=2) |
124 |
assertTrue(q.offer(new PDelay(i))); |
125 |
for (int i = (n & 1); i < n; i+=2) |
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assertTrue(q.offer(new PDelay(i))); |
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assertFalse(q.isEmpty()); |
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assertEquals(NOCAP, q.remainingCapacity()); |
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assertEquals(n, q.size()); |
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return q; |
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} |
132 |
|
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/** |
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* A new queue has unbounded capacity |
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*/ |
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public void testConstructor1() { |
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assertEquals(NOCAP, new DelayQueue().remainingCapacity()); |
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} |
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|
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/** |
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* Initializing from null Collection throws NPE |
142 |
*/ |
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public void testConstructor3() { |
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try { |
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DelayQueue q = new DelayQueue(null); |
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shouldThrow(); |
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} catch (NullPointerException success) {} |
148 |
} |
149 |
|
150 |
/** |
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* Initializing from Collection of null elements throws NPE |
152 |
*/ |
153 |
public void testConstructor4() { |
154 |
try { |
155 |
PDelay[] ints = new PDelay[SIZE]; |
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DelayQueue q = new DelayQueue(Arrays.asList(ints)); |
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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 with some null elements throws NPE |
163 |
*/ |
164 |
public void testConstructor5() { |
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try { |
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PDelay[] ints = new PDelay[SIZE]; |
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for (int i = 0; i < SIZE-1; ++i) |
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ints[i] = new PDelay(i); |
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DelayQueue q = new DelayQueue(Arrays.asList(ints)); |
170 |
shouldThrow(); |
171 |
} catch (NullPointerException success) {} |
172 |
} |
173 |
|
174 |
/** |
175 |
* Queue contains all elements of collection used to initialize |
176 |
*/ |
177 |
public void testConstructor6() { |
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PDelay[] ints = new PDelay[SIZE]; |
179 |
for (int i = 0; i < SIZE; ++i) |
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ints[i] = new PDelay(i); |
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DelayQueue q = new DelayQueue(Arrays.asList(ints)); |
182 |
for (int i = 0; i < SIZE; ++i) |
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assertEquals(ints[i], q.poll()); |
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} |
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|
186 |
/** |
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* isEmpty is true before add, false after |
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*/ |
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public void testEmpty() { |
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DelayQueue q = new DelayQueue(); |
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assertTrue(q.isEmpty()); |
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assertEquals(NOCAP, q.remainingCapacity()); |
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q.add(new PDelay(1)); |
194 |
assertFalse(q.isEmpty()); |
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q.add(new PDelay(2)); |
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q.remove(); |
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q.remove(); |
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assertTrue(q.isEmpty()); |
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} |
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|
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/** |
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* remainingCapacity does not change when elementa added or removed, |
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* but size does |
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*/ |
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public void testRemainingCapacity() { |
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DelayQueue q = populatedQueue(SIZE); |
207 |
for (int i = 0; i < SIZE; ++i) { |
208 |
assertEquals(NOCAP, q.remainingCapacity()); |
209 |
assertEquals(SIZE-i, q.size()); |
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q.remove(); |
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} |
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for (int i = 0; i < SIZE; ++i) { |
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assertEquals(NOCAP, q.remainingCapacity()); |
214 |
assertEquals(i, q.size()); |
215 |
q.add(new PDelay(i)); |
216 |
} |
217 |
} |
218 |
|
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/** |
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* offer(null) throws NPE |
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*/ |
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public void testOfferNull() { |
223 |
try { |
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DelayQueue q = new DelayQueue(); |
225 |
q.offer(null); |
226 |
shouldThrow(); |
227 |
} catch (NullPointerException success) {} |
228 |
} |
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|
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/** |
231 |
* add(null) throws NPE |
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*/ |
233 |
public void testAddNull() { |
234 |
try { |
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DelayQueue q = new DelayQueue(); |
236 |
q.add(null); |
237 |
shouldThrow(); |
238 |
} catch (NullPointerException success) {} |
239 |
} |
240 |
|
241 |
/** |
242 |
* offer non-null succeeds |
243 |
*/ |
244 |
public void testOffer() { |
245 |
DelayQueue q = new DelayQueue(); |
246 |
assertTrue(q.offer(new PDelay(0))); |
247 |
assertTrue(q.offer(new PDelay(1))); |
248 |
} |
249 |
|
250 |
/** |
251 |
* add succeeds |
252 |
*/ |
253 |
public void testAdd() { |
254 |
DelayQueue q = new DelayQueue(); |
255 |
for (int i = 0; i < SIZE; ++i) { |
256 |
assertEquals(i, q.size()); |
257 |
assertTrue(q.add(new PDelay(i))); |
258 |
} |
259 |
} |
260 |
|
261 |
/** |
262 |
* addAll(null) throws NPE |
263 |
*/ |
264 |
public void testAddAll1() { |
265 |
try { |
266 |
DelayQueue q = new DelayQueue(); |
267 |
q.addAll(null); |
268 |
shouldThrow(); |
269 |
} catch (NullPointerException success) {} |
270 |
} |
271 |
|
272 |
|
273 |
/** |
274 |
* addAll(this) throws IAE |
275 |
*/ |
276 |
public void testAddAllSelf() { |
277 |
try { |
278 |
DelayQueue q = populatedQueue(SIZE); |
279 |
q.addAll(q); |
280 |
shouldThrow(); |
281 |
} catch (IllegalArgumentException success) {} |
282 |
} |
283 |
|
284 |
/** |
285 |
* addAll of a collection with null elements throws NPE |
286 |
*/ |
287 |
public void testAddAll2() { |
288 |
try { |
289 |
DelayQueue q = new DelayQueue(); |
290 |
PDelay[] ints = new PDelay[SIZE]; |
291 |
q.addAll(Arrays.asList(ints)); |
292 |
shouldThrow(); |
293 |
} catch (NullPointerException success) {} |
294 |
} |
295 |
/** |
296 |
* addAll of a collection with any null elements throws NPE after |
297 |
* possibly adding some elements |
298 |
*/ |
299 |
public void testAddAll3() { |
300 |
try { |
301 |
DelayQueue q = new DelayQueue(); |
302 |
PDelay[] ints = new PDelay[SIZE]; |
303 |
for (int i = 0; i < SIZE-1; ++i) |
304 |
ints[i] = new PDelay(i); |
305 |
q.addAll(Arrays.asList(ints)); |
306 |
shouldThrow(); |
307 |
} catch (NullPointerException success) {} |
308 |
} |
309 |
|
310 |
/** |
311 |
* Queue contains all elements of successful addAll |
312 |
*/ |
313 |
public void testAddAll5() { |
314 |
PDelay[] empty = new PDelay[0]; |
315 |
PDelay[] ints = new PDelay[SIZE]; |
316 |
for (int i = SIZE-1; i >= 0; --i) |
317 |
ints[i] = new PDelay(i); |
318 |
DelayQueue q = new DelayQueue(); |
319 |
assertFalse(q.addAll(Arrays.asList(empty))); |
320 |
assertTrue(q.addAll(Arrays.asList(ints))); |
321 |
for (int i = 0; i < SIZE; ++i) |
322 |
assertEquals(ints[i], q.poll()); |
323 |
} |
324 |
|
325 |
/** |
326 |
* put(null) throws NPE |
327 |
*/ |
328 |
public void testPutNull() { |
329 |
try { |
330 |
DelayQueue q = new DelayQueue(); |
331 |
q.put(null); |
332 |
shouldThrow(); |
333 |
} catch (NullPointerException success) {} |
334 |
} |
335 |
|
336 |
/** |
337 |
* all elements successfully put are contained |
338 |
*/ |
339 |
public void testPut() { |
340 |
DelayQueue q = new DelayQueue(); |
341 |
for (int i = 0; i < SIZE; ++i) { |
342 |
PDelay I = new PDelay(i); |
343 |
q.put(I); |
344 |
assertTrue(q.contains(I)); |
345 |
} |
346 |
assertEquals(SIZE, q.size()); |
347 |
} |
348 |
|
349 |
/** |
350 |
* put doesn't block waiting for take |
351 |
*/ |
352 |
public void testPutWithTake() throws InterruptedException { |
353 |
final DelayQueue q = new DelayQueue(); |
354 |
Thread t = new Thread(new CheckedRunnable() { |
355 |
public void realRun() { |
356 |
q.put(new PDelay(0)); |
357 |
q.put(new PDelay(0)); |
358 |
q.put(new PDelay(0)); |
359 |
q.put(new PDelay(0)); |
360 |
}}); |
361 |
|
362 |
t.start(); |
363 |
Thread.sleep(SHORT_DELAY_MS); |
364 |
q.take(); |
365 |
t.interrupt(); |
366 |
t.join(); |
367 |
} |
368 |
|
369 |
/** |
370 |
* timed offer does not time out |
371 |
*/ |
372 |
public void testTimedOffer() throws InterruptedException { |
373 |
final DelayQueue q = new DelayQueue(); |
374 |
Thread t = new Thread(new CheckedRunnable() { |
375 |
public void realRun() throws InterruptedException { |
376 |
q.put(new PDelay(0)); |
377 |
q.put(new PDelay(0)); |
378 |
assertTrue(q.offer(new PDelay(0), SHORT_DELAY_MS, MILLISECONDS)); |
379 |
assertTrue(q.offer(new PDelay(0), LONG_DELAY_MS, MILLISECONDS)); |
380 |
}}); |
381 |
|
382 |
t.start(); |
383 |
Thread.sleep(SMALL_DELAY_MS); |
384 |
t.interrupt(); |
385 |
t.join(); |
386 |
} |
387 |
|
388 |
/** |
389 |
* take retrieves elements in priority order |
390 |
*/ |
391 |
public void testTake() throws InterruptedException { |
392 |
DelayQueue q = populatedQueue(SIZE); |
393 |
for (int i = 0; i < SIZE; ++i) { |
394 |
assertEquals(new PDelay(i), ((PDelay)q.take())); |
395 |
} |
396 |
} |
397 |
|
398 |
/** |
399 |
* take blocks interruptibly when empty |
400 |
*/ |
401 |
public void testTakeFromEmpty() throws InterruptedException { |
402 |
final DelayQueue q = new DelayQueue(); |
403 |
Thread t = new ThreadShouldThrow(InterruptedException.class) { |
404 |
public void realRun() throws InterruptedException { |
405 |
q.take(); |
406 |
}}; |
407 |
|
408 |
t.start(); |
409 |
Thread.sleep(SHORT_DELAY_MS); |
410 |
t.interrupt(); |
411 |
t.join(); |
412 |
} |
413 |
|
414 |
/** |
415 |
* Take removes existing elements until empty, then blocks interruptibly |
416 |
*/ |
417 |
public void testBlockingTake() throws InterruptedException { |
418 |
Thread t = new ThreadShouldThrow(InterruptedException.class) { |
419 |
public void realRun() throws InterruptedException { |
420 |
DelayQueue q = populatedQueue(SIZE); |
421 |
for (int i = 0; i < SIZE; ++i) { |
422 |
threadAssertEquals(new PDelay(i), ((PDelay)q.take())); |
423 |
} |
424 |
q.take(); |
425 |
}}; |
426 |
|
427 |
t.start(); |
428 |
Thread.sleep(SHORT_DELAY_MS); |
429 |
t.interrupt(); |
430 |
t.join(); |
431 |
} |
432 |
|
433 |
|
434 |
/** |
435 |
* poll succeeds unless empty |
436 |
*/ |
437 |
public void testPoll() { |
438 |
DelayQueue q = populatedQueue(SIZE); |
439 |
for (int i = 0; i < SIZE; ++i) { |
440 |
assertEquals(new PDelay(i), ((PDelay)q.poll())); |
441 |
} |
442 |
assertNull(q.poll()); |
443 |
} |
444 |
|
445 |
/** |
446 |
* timed pool with zero timeout succeeds when non-empty, else times out |
447 |
*/ |
448 |
public void testTimedPoll0() throws InterruptedException { |
449 |
DelayQueue q = populatedQueue(SIZE); |
450 |
for (int i = 0; i < SIZE; ++i) { |
451 |
assertEquals(new PDelay(i), ((PDelay)q.poll(0, MILLISECONDS))); |
452 |
} |
453 |
assertNull(q.poll(0, MILLISECONDS)); |
454 |
} |
455 |
|
456 |
/** |
457 |
* timed pool with nonzero timeout succeeds when non-empty, else times out |
458 |
*/ |
459 |
public void testTimedPoll() throws InterruptedException { |
460 |
DelayQueue q = populatedQueue(SIZE); |
461 |
for (int i = 0; i < SIZE; ++i) { |
462 |
assertEquals(new PDelay(i), ((PDelay)q.poll(SHORT_DELAY_MS, MILLISECONDS))); |
463 |
} |
464 |
assertNull(q.poll(SHORT_DELAY_MS, MILLISECONDS)); |
465 |
} |
466 |
|
467 |
/** |
468 |
* Interrupted timed poll throws InterruptedException instead of |
469 |
* returning timeout status |
470 |
*/ |
471 |
public void testInterruptedTimedPoll() throws InterruptedException { |
472 |
Thread t = new Thread(new CheckedRunnable() { |
473 |
public void realRun() throws InterruptedException { |
474 |
DelayQueue q = populatedQueue(SIZE); |
475 |
for (int i = 0; i < SIZE; ++i) { |
476 |
assertEquals(new PDelay(i), ((PDelay)q.poll(SHORT_DELAY_MS, MILLISECONDS))); |
477 |
} |
478 |
try { |
479 |
q.poll(SMALL_DELAY_MS, MILLISECONDS); |
480 |
shouldThrow(); |
481 |
} catch (InterruptedException success) {} |
482 |
}}); |
483 |
|
484 |
t.start(); |
485 |
Thread.sleep(SHORT_DELAY_MS); |
486 |
t.interrupt(); |
487 |
t.join(); |
488 |
} |
489 |
|
490 |
/** |
491 |
* timed poll before a delayed offer fails; after offer succeeds; |
492 |
* on interruption throws |
493 |
*/ |
494 |
public void testTimedPollWithOffer() throws InterruptedException { |
495 |
final DelayQueue q = new DelayQueue(); |
496 |
final PDelay pdelay = new PDelay(0); |
497 |
Thread t = new Thread(new CheckedRunnable() { |
498 |
public void realRun() throws InterruptedException { |
499 |
assertNull(q.poll(SHORT_DELAY_MS, MILLISECONDS)); |
500 |
assertSame(pdelay, q.poll(LONG_DELAY_MS, MILLISECONDS)); |
501 |
try { |
502 |
q.poll(LONG_DELAY_MS, MILLISECONDS); |
503 |
shouldThrow(); |
504 |
} catch (InterruptedException success) {} |
505 |
}}); |
506 |
|
507 |
t.start(); |
508 |
Thread.sleep(SMALL_DELAY_MS); |
509 |
assertTrue(q.offer(pdelay, SHORT_DELAY_MS, MILLISECONDS)); |
510 |
t.interrupt(); |
511 |
t.join(); |
512 |
} |
513 |
|
514 |
|
515 |
/** |
516 |
* peek returns next element, or null if empty |
517 |
*/ |
518 |
public void testPeek() { |
519 |
DelayQueue q = populatedQueue(SIZE); |
520 |
for (int i = 0; i < SIZE; ++i) { |
521 |
assertEquals(new PDelay(i), ((PDelay)q.peek())); |
522 |
q.poll(); |
523 |
if (q.isEmpty()) |
524 |
assertNull(q.peek()); |
525 |
else |
526 |
assertTrue(i != ((PDelay)q.peek()).intValue()); |
527 |
} |
528 |
assertNull(q.peek()); |
529 |
} |
530 |
|
531 |
/** |
532 |
* element returns next element, or throws NSEE if empty |
533 |
*/ |
534 |
public void testElement() { |
535 |
DelayQueue q = populatedQueue(SIZE); |
536 |
for (int i = 0; i < SIZE; ++i) { |
537 |
assertEquals(new PDelay(i), ((PDelay)q.element())); |
538 |
q.poll(); |
539 |
} |
540 |
try { |
541 |
q.element(); |
542 |
shouldThrow(); |
543 |
} catch (NoSuchElementException success) {} |
544 |
} |
545 |
|
546 |
/** |
547 |
* remove removes next element, or throws NSEE if empty |
548 |
*/ |
549 |
public void testRemove() { |
550 |
DelayQueue q = populatedQueue(SIZE); |
551 |
for (int i = 0; i < SIZE; ++i) { |
552 |
assertEquals(new PDelay(i), ((PDelay)q.remove())); |
553 |
} |
554 |
try { |
555 |
q.remove(); |
556 |
shouldThrow(); |
557 |
} catch (NoSuchElementException success) {} |
558 |
} |
559 |
|
560 |
/** |
561 |
* remove(x) removes x and returns true if present |
562 |
*/ |
563 |
public void testRemoveElement() { |
564 |
DelayQueue q = populatedQueue(SIZE); |
565 |
for (int i = 1; i < SIZE; i+=2) { |
566 |
assertTrue(q.remove(new PDelay(i))); |
567 |
} |
568 |
for (int i = 0; i < SIZE; i+=2) { |
569 |
assertTrue(q.remove(new PDelay(i))); |
570 |
assertFalse(q.remove(new PDelay(i+1))); |
571 |
} |
572 |
assertTrue(q.isEmpty()); |
573 |
} |
574 |
|
575 |
/** |
576 |
* contains(x) reports true when elements added but not yet removed |
577 |
*/ |
578 |
public void testContains() { |
579 |
DelayQueue q = populatedQueue(SIZE); |
580 |
for (int i = 0; i < SIZE; ++i) { |
581 |
assertTrue(q.contains(new PDelay(i))); |
582 |
q.poll(); |
583 |
assertFalse(q.contains(new PDelay(i))); |
584 |
} |
585 |
} |
586 |
|
587 |
/** |
588 |
* clear removes all elements |
589 |
*/ |
590 |
public void testClear() { |
591 |
DelayQueue q = populatedQueue(SIZE); |
592 |
q.clear(); |
593 |
assertTrue(q.isEmpty()); |
594 |
assertEquals(0, q.size()); |
595 |
assertEquals(NOCAP, q.remainingCapacity()); |
596 |
PDelay x = new PDelay(1); |
597 |
q.add(x); |
598 |
assertFalse(q.isEmpty()); |
599 |
assertTrue(q.contains(x)); |
600 |
q.clear(); |
601 |
assertTrue(q.isEmpty()); |
602 |
} |
603 |
|
604 |
/** |
605 |
* containsAll(c) is true when c contains a subset of elements |
606 |
*/ |
607 |
public void testContainsAll() { |
608 |
DelayQueue q = populatedQueue(SIZE); |
609 |
DelayQueue p = new DelayQueue(); |
610 |
for (int i = 0; i < SIZE; ++i) { |
611 |
assertTrue(q.containsAll(p)); |
612 |
assertFalse(p.containsAll(q)); |
613 |
p.add(new PDelay(i)); |
614 |
} |
615 |
assertTrue(p.containsAll(q)); |
616 |
} |
617 |
|
618 |
/** |
619 |
* retainAll(c) retains only those elements of c and reports true if changed |
620 |
*/ |
621 |
public void testRetainAll() { |
622 |
DelayQueue q = populatedQueue(SIZE); |
623 |
DelayQueue p = populatedQueue(SIZE); |
624 |
for (int i = 0; i < SIZE; ++i) { |
625 |
boolean changed = q.retainAll(p); |
626 |
if (i == 0) |
627 |
assertFalse(changed); |
628 |
else |
629 |
assertTrue(changed); |
630 |
|
631 |
assertTrue(q.containsAll(p)); |
632 |
assertEquals(SIZE-i, q.size()); |
633 |
p.remove(); |
634 |
} |
635 |
} |
636 |
|
637 |
/** |
638 |
* removeAll(c) removes only those elements of c and reports true if changed |
639 |
*/ |
640 |
public void testRemoveAll() { |
641 |
for (int i = 1; i < SIZE; ++i) { |
642 |
DelayQueue q = populatedQueue(SIZE); |
643 |
DelayQueue p = populatedQueue(i); |
644 |
assertTrue(q.removeAll(p)); |
645 |
assertEquals(SIZE-i, q.size()); |
646 |
for (int j = 0; j < i; ++j) { |
647 |
PDelay I = (PDelay)(p.remove()); |
648 |
assertFalse(q.contains(I)); |
649 |
} |
650 |
} |
651 |
} |
652 |
|
653 |
/** |
654 |
* toArray contains all elements |
655 |
*/ |
656 |
public void testToArray() throws InterruptedException { |
657 |
DelayQueue q = populatedQueue(SIZE); |
658 |
Object[] o = q.toArray(); |
659 |
Arrays.sort(o); |
660 |
for (int i = 0; i < o.length; i++) |
661 |
assertEquals(o[i], q.take()); |
662 |
} |
663 |
|
664 |
/** |
665 |
* toArray(a) contains all elements |
666 |
*/ |
667 |
public void testToArray2() throws InterruptedException { |
668 |
DelayQueue q = populatedQueue(SIZE); |
669 |
PDelay[] ints = new PDelay[SIZE]; |
670 |
ints = (PDelay[])q.toArray(ints); |
671 |
Arrays.sort(ints); |
672 |
for (int i = 0; i < ints.length; i++) |
673 |
assertEquals(ints[i], q.take()); |
674 |
} |
675 |
|
676 |
|
677 |
/** |
678 |
* toArray(null) throws NPE |
679 |
*/ |
680 |
public void testToArray_BadArg() { |
681 |
try { |
682 |
DelayQueue q = populatedQueue(SIZE); |
683 |
Object o[] = q.toArray(null); |
684 |
shouldThrow(); |
685 |
} catch (NullPointerException success) {} |
686 |
} |
687 |
|
688 |
/** |
689 |
* toArray with incompatible array type throws CCE |
690 |
*/ |
691 |
public void testToArray1_BadArg() { |
692 |
try { |
693 |
DelayQueue q = populatedQueue(SIZE); |
694 |
Object o[] = q.toArray(new String[10] ); |
695 |
shouldThrow(); |
696 |
} catch (ArrayStoreException success) {} |
697 |
} |
698 |
|
699 |
/** |
700 |
* iterator iterates through all elements |
701 |
*/ |
702 |
public void testIterator() { |
703 |
DelayQueue q = populatedQueue(SIZE); |
704 |
int i = 0; |
705 |
Iterator it = q.iterator(); |
706 |
while (it.hasNext()) { |
707 |
assertTrue(q.contains(it.next())); |
708 |
++i; |
709 |
} |
710 |
assertEquals(i, SIZE); |
711 |
} |
712 |
|
713 |
/** |
714 |
* iterator.remove removes current element |
715 |
*/ |
716 |
public void testIteratorRemove () { |
717 |
final DelayQueue q = new DelayQueue(); |
718 |
q.add(new PDelay(2)); |
719 |
q.add(new PDelay(1)); |
720 |
q.add(new PDelay(3)); |
721 |
Iterator it = q.iterator(); |
722 |
it.next(); |
723 |
it.remove(); |
724 |
it = q.iterator(); |
725 |
assertEquals(it.next(), new PDelay(2)); |
726 |
assertEquals(it.next(), new PDelay(3)); |
727 |
assertFalse(it.hasNext()); |
728 |
} |
729 |
|
730 |
|
731 |
/** |
732 |
* toString contains toStrings of elements |
733 |
*/ |
734 |
public void testToString() { |
735 |
DelayQueue q = populatedQueue(SIZE); |
736 |
String s = q.toString(); |
737 |
for (int i = 0; i < SIZE; ++i) { |
738 |
assertTrue(s.indexOf(String.valueOf(Integer.MIN_VALUE+i)) >= 0); |
739 |
} |
740 |
} |
741 |
|
742 |
/** |
743 |
* offer transfers elements across Executor tasks |
744 |
*/ |
745 |
public void testPollInExecutor() { |
746 |
final DelayQueue q = new DelayQueue(); |
747 |
ExecutorService executor = Executors.newFixedThreadPool(2); |
748 |
executor.execute(new CheckedRunnable() { |
749 |
public void realRun() throws InterruptedException { |
750 |
threadAssertNull(q.poll()); |
751 |
threadAssertTrue(null != q.poll(MEDIUM_DELAY_MS, MILLISECONDS)); |
752 |
threadAssertTrue(q.isEmpty()); |
753 |
}}); |
754 |
|
755 |
executor.execute(new CheckedRunnable() { |
756 |
public void realRun() throws InterruptedException { |
757 |
Thread.sleep(SHORT_DELAY_MS); |
758 |
q.put(new PDelay(1)); |
759 |
}}); |
760 |
|
761 |
joinPool(executor); |
762 |
|
763 |
} |
764 |
|
765 |
|
766 |
/** |
767 |
* Delayed actions do not occur until their delay elapses |
768 |
*/ |
769 |
public void testDelay() throws InterruptedException { |
770 |
DelayQueue q = new DelayQueue(); |
771 |
NanoDelay[] elements = new NanoDelay[SIZE]; |
772 |
for (int i = 0; i < SIZE; ++i) { |
773 |
elements[i] = new NanoDelay(1000000000L + 1000000L * (SIZE - i)); |
774 |
} |
775 |
for (int i = 0; i < SIZE; ++i) { |
776 |
q.add(elements[i]); |
777 |
} |
778 |
|
779 |
long last = 0; |
780 |
for (int i = 0; i < SIZE; ++i) { |
781 |
NanoDelay e = (NanoDelay)(q.take()); |
782 |
long tt = e.getTriggerTime(); |
783 |
assertTrue(tt <= System.nanoTime()); |
784 |
if (i != 0) |
785 |
assertTrue(tt >= last); |
786 |
last = tt; |
787 |
} |
788 |
} |
789 |
|
790 |
/** |
791 |
* peek of a non-empty queue returns non-null even if not expired |
792 |
*/ |
793 |
public void testPeekDelayed() { |
794 |
DelayQueue q = new DelayQueue(); |
795 |
q.add(new NanoDelay(Long.MAX_VALUE)); |
796 |
assert(q.peek() != null); |
797 |
} |
798 |
|
799 |
|
800 |
/** |
801 |
* poll of a non-empty queue returns null if no expired elements. |
802 |
*/ |
803 |
public void testPollDelayed() { |
804 |
DelayQueue q = new DelayQueue(); |
805 |
q.add(new NanoDelay(Long.MAX_VALUE)); |
806 |
assertNull(q.poll()); |
807 |
} |
808 |
|
809 |
/** |
810 |
* timed poll of a non-empty queue returns null if no expired elements. |
811 |
*/ |
812 |
public void testTimedPollDelayed() throws InterruptedException { |
813 |
DelayQueue q = new DelayQueue(); |
814 |
q.add(new NanoDelay(LONG_DELAY_MS * 1000000L)); |
815 |
assertNull(q.poll(SHORT_DELAY_MS, MILLISECONDS)); |
816 |
} |
817 |
|
818 |
/** |
819 |
* drainTo(null) throws NPE |
820 |
*/ |
821 |
public void testDrainToNull() { |
822 |
DelayQueue q = populatedQueue(SIZE); |
823 |
try { |
824 |
q.drainTo(null); |
825 |
shouldThrow(); |
826 |
} catch (NullPointerException success) {} |
827 |
} |
828 |
|
829 |
/** |
830 |
* drainTo(this) throws IAE |
831 |
*/ |
832 |
public void testDrainToSelf() { |
833 |
DelayQueue q = populatedQueue(SIZE); |
834 |
try { |
835 |
q.drainTo(q); |
836 |
shouldThrow(); |
837 |
} catch (IllegalArgumentException success) {} |
838 |
} |
839 |
|
840 |
/** |
841 |
* drainTo(c) empties queue into another collection c |
842 |
*/ |
843 |
public void testDrainTo() { |
844 |
DelayQueue q = new DelayQueue(); |
845 |
PDelay[] elems = new PDelay[SIZE]; |
846 |
for (int i = 0; i < SIZE; ++i) { |
847 |
elems[i] = new PDelay(i); |
848 |
q.add(elems[i]); |
849 |
} |
850 |
ArrayList l = new ArrayList(); |
851 |
q.drainTo(l); |
852 |
assertEquals(q.size(), 0); |
853 |
for (int i = 0; i < SIZE; ++i) |
854 |
assertEquals(l.get(i), elems[i]); |
855 |
q.add(elems[0]); |
856 |
q.add(elems[1]); |
857 |
assertFalse(q.isEmpty()); |
858 |
assertTrue(q.contains(elems[0])); |
859 |
assertTrue(q.contains(elems[1])); |
860 |
l.clear(); |
861 |
q.drainTo(l); |
862 |
assertEquals(q.size(), 0); |
863 |
assertEquals(l.size(), 2); |
864 |
for (int i = 0; i < 2; ++i) |
865 |
assertEquals(l.get(i), elems[i]); |
866 |
} |
867 |
|
868 |
/** |
869 |
* drainTo empties queue |
870 |
*/ |
871 |
public void testDrainToWithActivePut() throws InterruptedException { |
872 |
final DelayQueue q = populatedQueue(SIZE); |
873 |
Thread t = new Thread(new CheckedRunnable() { |
874 |
public void realRun() { |
875 |
q.put(new PDelay(SIZE+1)); |
876 |
}}); |
877 |
|
878 |
t.start(); |
879 |
ArrayList l = new ArrayList(); |
880 |
q.drainTo(l); |
881 |
assertTrue(l.size() >= SIZE); |
882 |
t.join(); |
883 |
assertTrue(q.size() + l.size() >= SIZE); |
884 |
} |
885 |
|
886 |
/** |
887 |
* drainTo(null, n) throws NPE |
888 |
*/ |
889 |
public void testDrainToNullN() { |
890 |
DelayQueue q = populatedQueue(SIZE); |
891 |
try { |
892 |
q.drainTo(null, 0); |
893 |
shouldThrow(); |
894 |
} catch (NullPointerException success) {} |
895 |
} |
896 |
|
897 |
/** |
898 |
* drainTo(this, n) throws IAE |
899 |
*/ |
900 |
public void testDrainToSelfN() { |
901 |
DelayQueue q = populatedQueue(SIZE); |
902 |
try { |
903 |
q.drainTo(q, 0); |
904 |
shouldThrow(); |
905 |
} catch (IllegalArgumentException success) {} |
906 |
} |
907 |
|
908 |
/** |
909 |
* drainTo(c, n) empties first max {n, size} elements of queue into c |
910 |
*/ |
911 |
public void testDrainToN() { |
912 |
for (int i = 0; i < SIZE + 2; ++i) { |
913 |
DelayQueue q = populatedQueue(SIZE); |
914 |
ArrayList l = new ArrayList(); |
915 |
q.drainTo(l, i); |
916 |
int k = (i < SIZE)? i : SIZE; |
917 |
assertEquals(q.size(), SIZE-k); |
918 |
assertEquals(l.size(), k); |
919 |
} |
920 |
} |
921 |
|
922 |
|
923 |
} |