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Comparing jsr166/src/test/tck/SynchronousQueueTest.java (file contents):
Revision 1.35 by jsr166, Fri May 27 20:07:24 2011 UTC vs.
Revision 1.68 by dl, Tue Jan 26 13:33:06 2021 UTC

#	Line 6 | Line 6
6		* Pat Fisher, Mike Judd.
7		*/
8
9	–	import junit.framework.*;
10	–	import java.util.*;
11	–	import java.util.concurrent.*;
9		import static java.util.concurrent.TimeUnit.MILLISECONDS;
10	<	import java.io.*;
10	>
11	>	import java.util.ArrayList;
12	>	import java.util.Arrays;
13	>	import java.util.Collection;
14	>	import java.util.Iterator;
15	>	import java.util.NoSuchElementException;
16	>	import java.util.concurrent.BlockingQueue;
17	>	import java.util.concurrent.CountDownLatch;
18	>	import java.util.concurrent.Executors;
19	>	import java.util.concurrent.ExecutorService;
20	>	import java.util.concurrent.SynchronousQueue;
21	>
22	>	import junit.framework.Test;
23
24		public class SynchronousQueueTest extends JSR166TestCase {
25
#	Line 27 | Line 36 | public class SynchronousQueueTest extend
36		}
37
38		public static void main(String[] args) {
39	<	junit.textui.TestRunner.run(suite());
39	>	main(suite(), args);
40		}
41
42		public static Test suite() {
#	Line 42 | Line 51 | public class SynchronousQueueTest extend
51		public void testEmptyFull()      { testEmptyFull(false); }
52		public void testEmptyFull_fair() { testEmptyFull(true); }
53		public void testEmptyFull(boolean fair) {
54	<	final SynchronousQueue q = new SynchronousQueue(fair);
54	>	final SynchronousQueue<Item> q = new SynchronousQueue<Item>(fair);
55		assertTrue(q.isEmpty());
56	<	assertEquals(0, q.size());
57	<	assertEquals(0, q.remainingCapacity());
56	>	mustEqual(0, q.size());
57	>	mustEqual(0, q.remainingCapacity());
58		assertFalse(q.offer(zero));
59		}
60
61		/**
53	–	* offer(null) throws NPE
54	–	*/
55	–	public void testOfferNull() {
56	–	try {
57	–	SynchronousQueue q = new SynchronousQueue();
58	–	q.offer(null);
59	–	shouldThrow();
60	–	} catch (NullPointerException success) {}
61	–	}
62	–
63	–	/**
64	–	* add(null) throws NPE
65	–	*/
66	–	public void testAddNull() {
67	–	try {
68	–	SynchronousQueue q = new SynchronousQueue();
69	–	q.add(null);
70	–	shouldThrow();
71	–	} catch (NullPointerException success) {}
72	–	}
73	–
74	–	/**
62		* offer fails if no active taker
63		*/
64	<	public void testOffer() {
65	<	SynchronousQueue q = new SynchronousQueue();
64	>	public void testOffer()      { testOffer(false); }
65	>	public void testOffer_fair() { testOffer(true); }
66	>	public void testOffer(boolean fair) {
67	>	SynchronousQueue<Item> q = new SynchronousQueue<Item>(fair);
68		assertFalse(q.offer(one));
69		}
70
71		/**
72	<	* add throws ISE if no active taker
72	>	* add throws IllegalStateException if no active taker
73		*/
74	<	public void testAdd() {
74	>	public void testAdd()      { testAdd(false); }
75	>	public void testAdd_fair() { testAdd(true); }
76	>	public void testAdd(boolean fair) {
77	>	SynchronousQueue<Item> q = new SynchronousQueue<Item>(fair);
78	>	mustEqual(0, q.remainingCapacity());
79		try {
87	–	SynchronousQueue q = new SynchronousQueue();
88	–	assertEquals(0, q.remainingCapacity());
80		q.add(one);
81		shouldThrow();
82		} catch (IllegalStateException success) {}
83		}
84
85		/**
86	<	* addAll(null) throws NPE
86	>	* addAll(this) throws IllegalArgumentException
87		*/
88	<	public void testAddAll1() {
88	>	public void testAddAll_self()      { testAddAll_self(false); }
89	>	public void testAddAll_self_fair() { testAddAll_self(true); }
90	>	public void testAddAll_self(boolean fair) {
91	>	SynchronousQueue<Item> q = new SynchronousQueue<Item>(fair);
92		try {
99	–	SynchronousQueue q = new SynchronousQueue();
100	–	q.addAll(null);
101	–	shouldThrow();
102	–	} catch (NullPointerException success) {}
103	–	}
104	–
105	–	/**
106	–	* addAll(this) throws IAE
107	–	*/
108	–	public void testAddAllSelf() {
109	–	try {
110	–	SynchronousQueue q = new SynchronousQueue();
93		q.addAll(q);
94		shouldThrow();
95		} catch (IllegalArgumentException success) {}
96		}
97
98	<	/**
99	<	* addAll of a collection with null elements throws NPE
118	<	*/
119	<	public void testAddAll2() {
120	<	try {
121	<	SynchronousQueue q = new SynchronousQueue();
122	<	Integer[] ints = new Integer[1];
123	<	q.addAll(Arrays.asList(ints));
124	<	shouldThrow();
125	<	} catch (NullPointerException success) {}
126	<	}
127	<
128	<	/**
129	<	* addAll throws ISE if no active taker
98	>	/**S
99	>	* addAll throws IllegalStateException if no active taker
100		*/
101	<	public void testAddAll4() {
101	>	public void testAddAll_ISE()      { testAddAll_ISE(false); }
102	>	public void testAddAll_ISE_fair() { testAddAll_ISE(true); }
103	>	public void testAddAll_ISE(boolean fair) {
104	>	SynchronousQueue<Item> q = new SynchronousQueue<Item>(fair);
105	>	Item[] items = seqItems(1);
106	>	Collection<Item> coll = Arrays.asList(items);
107		try {
108	<	SynchronousQueue q = new SynchronousQueue();
134	<	Integer[] ints = new Integer[1];
135	<	for (int i = 0; i < 1; ++i)
136	<	ints[i] = new Integer(i);
137	<	q.addAll(Arrays.asList(ints));
108	>	q.addAll(coll);
109		shouldThrow();
110		} catch (IllegalStateException success) {}
111		}
112
113		/**
143	–	* put(null) throws NPE
144	–	*/
145	–	public void testPutNull() throws InterruptedException {
146	–	try {
147	–	SynchronousQueue q = new SynchronousQueue();
148	–	q.put(null);
149	–	shouldThrow();
150	–	} catch (NullPointerException success) {}
151	–	}
152	–
153	–	/**
114		* put blocks interruptibly if no active taker
115		*/
116		public void testBlockingPut()      { testBlockingPut(false); }
117		public void testBlockingPut_fair() { testBlockingPut(true); }
118		public void testBlockingPut(boolean fair) {
119	<	final SynchronousQueue q = new SynchronousQueue(fair);
119	>	final SynchronousQueue<Item> q = new SynchronousQueue<Item>(fair);
120		final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
121		Thread t = newStartedThread(new CheckedRunnable() {
122		public void realRun() throws InterruptedException {
123		Thread.currentThread().interrupt();
124		try {
125	<	q.put(99);
125	>	q.put(ninetynine);
126		shouldThrow();
127		} catch (InterruptedException success) {}
128		assertFalse(Thread.interrupted());
129
130		pleaseInterrupt.countDown();
131		try {
132	<	q.put(99);
132	>	q.put(ninetynine);
133		shouldThrow();
134		} catch (InterruptedException success) {}
135		assertFalse(Thread.interrupted());
136		}});
137
138		await(pleaseInterrupt);
139	<	assertThreadStaysAlive(t);
139	>	if (randomBoolean()) assertThreadBlocks(t, Thread.State.WAITING);
140		t.interrupt();
141		awaitTermination(t);
142	<	assertEquals(0, q.remainingCapacity());
142	>	mustEqual(0, q.remainingCapacity());
143		}
144
145		/**
#	Line 188 | Line 148 | public class SynchronousQueueTest extend
148		public void testPutWithTake()      { testPutWithTake(false); }
149		public void testPutWithTake_fair() { testPutWithTake(true); }
150		public void testPutWithTake(boolean fair) {
151	<	final SynchronousQueue q = new SynchronousQueue(fair);
151	>	final SynchronousQueue<Item> q = new SynchronousQueue<Item>(fair);
152		final CountDownLatch pleaseTake = new CountDownLatch(1);
153		final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
154		Thread t = newStartedThread(new CheckedRunnable() {
#	Line 196 | Line 156 | public class SynchronousQueueTest extend
156		pleaseTake.countDown();
157		q.put(one);
158
159	+	Thread.currentThread().interrupt();
160	+	try {
161	+	q.put(ninetynine);
162	+	shouldThrow();
163	+	} catch (InterruptedException success) {}
164	+	assertFalse(Thread.interrupted());
165	+
166		pleaseInterrupt.countDown();
167		try {
168	<	q.put(99);
168	>	q.put(ninetynine);
169		shouldThrow();
170		} catch (InterruptedException success) {}
171		assertFalse(Thread.interrupted());
172		}});
173
174		await(pleaseTake);
175	<	assertEquals(q.remainingCapacity(), 0);
175	>	mustEqual(0, q.remainingCapacity());
176		try { assertSame(one, q.take()); }
177		catch (InterruptedException e) { threadUnexpectedException(e); }
178
179		await(pleaseInterrupt);
180	<	assertThreadStaysAlive(t);
180	>	if (randomBoolean()) assertThreadBlocks(t, Thread.State.WAITING);
181		t.interrupt();
182		awaitTermination(t);
183	<	assertEquals(q.remainingCapacity(), 0);
183	>	mustEqual(0, q.remainingCapacity());
184		}
185
186		/**
187		* timed offer times out if elements not taken
188		*/
189	<	public void testTimedOffer()      { testTimedOffer(false); }
190	<	public void testTimedOffer_fair() { testTimedOffer(true); }
191	<	public void testTimedOffer(boolean fair) {
225	<	final SynchronousQueue q = new SynchronousQueue(fair);
189	>	public void testTimedOffer() {
190	>	final boolean fair = randomBoolean();
191	>	final SynchronousQueue<Item> q = new SynchronousQueue<Item>(fair);
192		final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
193		Thread t = newStartedThread(new CheckedRunnable() {
194		public void realRun() throws InterruptedException {
195		long startTime = System.nanoTime();
196	<	assertFalse(q.offer(new Object(), timeoutMillis(), MILLISECONDS));
196	>
197	>	assertFalse(q.offer(zero, timeoutMillis(), MILLISECONDS));
198		assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
199	+
200	+	Thread.currentThread().interrupt();
201	+	try {
202	+	q.offer(one, randomTimeout(), randomTimeUnit());
203	+	shouldThrow();
204	+	} catch (InterruptedException success) {}
205	+	assertFalse(Thread.interrupted());
206	+
207		pleaseInterrupt.countDown();
208		try {
209	<	q.offer(new Object(), 2 * LONG_DELAY_MS, MILLISECONDS);
209	>	q.offer(two, LONGER_DELAY_MS, MILLISECONDS);
210		shouldThrow();
211		} catch (InterruptedException success) {}
212	+	assertFalse(Thread.interrupted());
213		}});
214
215		await(pleaseInterrupt);
216	<	assertThreadStaysAlive(t);
216	>	if (randomBoolean()) assertThreadBlocks(t, Thread.State.TIMED_WAITING);
217		t.interrupt();
218		awaitTermination(t);
219		}
#	Line 245 | Line 221 | public class SynchronousQueueTest extend
221		/**
222		* poll return null if no active putter
223		*/
224	<	public void testPoll() {
225	<	SynchronousQueue q = new SynchronousQueue();
224	>	public void testPoll()      { testPoll(false); }
225	>	public void testPoll_fair() { testPoll(true); }
226	>	public void testPoll(boolean fair) {
227	>	final SynchronousQueue<Item> q = new SynchronousQueue<Item>(fair);
228		assertNull(q.poll());
229		}
230
231		/**
232		* timed poll with zero timeout times out if no active putter
233		*/
234	<	public void testTimedPoll0() throws InterruptedException {
235	<	SynchronousQueue q = new SynchronousQueue();
236	<	assertNull(q.poll(0, MILLISECONDS));
234	>	public void testTimedPoll0()      { testTimedPoll0(false); }
235	>	public void testTimedPoll0_fair() { testTimedPoll0(true); }
236	>	public void testTimedPoll0(boolean fair) {
237	>	final SynchronousQueue<Item> q = new SynchronousQueue<Item>(fair);
238	>	try { assertNull(q.poll(0, MILLISECONDS)); }
239	>	catch (InterruptedException e) { threadUnexpectedException(e); }
240		}
241
242		/**
243		* timed poll with nonzero timeout times out if no active putter
244		*/
245	<	public void testTimedPoll() throws InterruptedException {
246	<	SynchronousQueue q = new SynchronousQueue();
247	<	long startTime = System.nanoTime();
248	<	assertNull(q.poll(timeoutMillis(), MILLISECONDS));
245	>	public void testTimedPoll() {
246	>	final boolean fair = randomBoolean();
247	>	final SynchronousQueue<Item> q = new SynchronousQueue<Item>(fair);
248	>	final long startTime = System.nanoTime();
249	>	try { assertNull(q.poll(timeoutMillis(), MILLISECONDS)); }
250	>	catch (InterruptedException e) { threadUnexpectedException(e); }
251		assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
252		}
253
#	Line 272 | Line 255 | public class SynchronousQueueTest extend
255		* timed poll before a delayed offer times out, returning null;
256		* after offer succeeds; on interruption throws
257		*/
258	<	public void testFairTimedPollWithOffer() throws InterruptedException {
259	<	final SynchronousQueue q = new SynchronousQueue(true);
258	>	public void testTimedPollWithOffer() {
259	>	final boolean fair = randomBoolean();
260	>	final SynchronousQueue<Item> q = new SynchronousQueue<Item>(fair);
261		final CountDownLatch pleaseOffer = new CountDownLatch(1);
262	+	final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
263		Thread t = newStartedThread(new CheckedRunnable() {
264		public void realRun() throws InterruptedException {
265	<	long t0 = System.nanoTime();
266	<	assertNull(q.poll(SHORT_DELAY_MS, MILLISECONDS));
267	<	assertTrue(millisElapsedSince(t0) >= SHORT_DELAY_MS);
265	>	long startTime = System.nanoTime();
266	>	assertNull(q.poll(timeoutMillis(), MILLISECONDS));
267	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
268
269		pleaseOffer.countDown();
270	<	t0 = System.nanoTime();
270	>	startTime = System.nanoTime();
271		assertSame(zero, q.poll(LONG_DELAY_MS, MILLISECONDS));
287	–	assertTrue(millisElapsedSince(t0) < MEDIUM_DELAY_MS);
272
273	<	t0 = System.nanoTime();
273	>	Thread.currentThread().interrupt();
274	>	try {
275	>	q.poll(randomTimeout(), randomTimeUnit());
276	>	shouldThrow();
277	>	} catch (InterruptedException success) {}
278	>	assertFalse(Thread.interrupted());
279	>
280	>	pleaseInterrupt.countDown();
281		try {
282		q.poll(LONG_DELAY_MS, MILLISECONDS);
283		shouldThrow();
284		} catch (InterruptedException success) {}
285	<	assertTrue(millisElapsedSince(t0) < MEDIUM_DELAY_MS);
285	>	assertFalse(Thread.interrupted());
286	>
287	>	assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS);
288		}});
289
290	<	assertTrue(pleaseOffer.await(MEDIUM_DELAY_MS, MILLISECONDS));
291	<	long t0 = System.nanoTime();
292	<	assertTrue(q.offer(zero, LONG_DELAY_MS, MILLISECONDS));
293	<	assertTrue(millisElapsedSince(t0) < MEDIUM_DELAY_MS);
290	>	await(pleaseOffer);
291	>	long startTime = System.nanoTime();
292	>	try { assertTrue(q.offer(zero, LONG_DELAY_MS, MILLISECONDS)); }
293	>	catch (InterruptedException e) { threadUnexpectedException(e); }
294	>	assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS);
295
296	+	await(pleaseInterrupt);
297	+	if (randomBoolean()) assertThreadBlocks(t, Thread.State.TIMED_WAITING);
298		t.interrupt();
299	<	awaitTermination(t, MEDIUM_DELAY_MS);
299	>	awaitTermination(t);
300		}
301
302		/**
303		* peek() returns null if no active putter
304		*/
305	<	public void testPeek() {
306	<	SynchronousQueue q = new SynchronousQueue();
305	>	public void testPeek()      { testPeek(false); }
306	>	public void testPeek_fair() { testPeek(true); }
307	>	public void testPeek(boolean fair) {
308	>	final SynchronousQueue<Item> q = new SynchronousQueue<Item>(fair);
309		assertNull(q.peek());
310		}
311
312		/**
313	<	* element() throws NSEE if no active putter
313	>	* element() throws NoSuchElementException if no active putter
314		*/
315	<	public void testElement() {
316	<	SynchronousQueue q = new SynchronousQueue();
315	>	public void testElement()      { testElement(false); }
316	>	public void testElement_fair() { testElement(true); }
317	>	public void testElement(boolean fair) {
318	>	final SynchronousQueue<Item> q = new SynchronousQueue<Item>(fair);
319		try {
320		q.element();
321		shouldThrow();
#	Line 323 | Line 323 | public class SynchronousQueueTest extend
323		}
324
325		/**
326	<	* remove() throws NSEE if no active putter
326	>	* remove() throws NoSuchElementException if no active putter
327		*/
328	<	public void testRemove() {
329	<	SynchronousQueue q = new SynchronousQueue();
328	>	public void testRemove()      { testRemove(false); }
329	>	public void testRemove_fair() { testRemove(true); }
330	>	public void testRemove(boolean fair) {
331	>	final SynchronousQueue<Item> q = new SynchronousQueue<Item>(fair);
332		try {
333		q.remove();
334		shouldThrow();
#	Line 334 | Line 336 | public class SynchronousQueueTest extend
336		}
337
338		/**
337	–	* remove(x) returns false
338	–	*/
339	–	public void testRemoveElement() {
340	–	SynchronousQueue q = new SynchronousQueue();
341	–	assertFalse(q.remove(zero));
342	–	assertTrue(q.isEmpty());
343	–	}
344	–
345	–	/**
339		* contains returns false
340		*/
341	<	public void testContains() {
342	<	SynchronousQueue q = new SynchronousQueue();
341	>	public void testContains()      { testContains(false); }
342	>	public void testContains_fair() { testContains(true); }
343	>	public void testContains(boolean fair) {
344	>	final SynchronousQueue<Item> q = new SynchronousQueue<Item>(fair);
345		assertFalse(q.contains(zero));
346		}
347
348		/**
349		* clear ensures isEmpty
350		*/
351	<	public void testClear() {
352	<	SynchronousQueue q = new SynchronousQueue();
351	>	public void testClear()      { testClear(false); }
352	>	public void testClear_fair() { testClear(true); }
353	>	public void testClear(boolean fair) {
354	>	final SynchronousQueue<Item> q = new SynchronousQueue<Item>(fair);
355		q.clear();
356		assertTrue(q.isEmpty());
357		}
#	Line 362 | Line 359 | public class SynchronousQueueTest extend
359		/**
360		* containsAll returns false unless empty
361		*/
362	<	public void testContainsAll() {
363	<	SynchronousQueue q = new SynchronousQueue();
364	<	Integer[] empty = new Integer[0];
362	>	public void testContainsAll()      { testContainsAll(false); }
363	>	public void testContainsAll_fair() { testContainsAll(true); }
364	>	public void testContainsAll(boolean fair) {
365	>	final SynchronousQueue<Item> q = new SynchronousQueue<Item>(fair);
366	>	Item[] empty = new Item[0];
367		assertTrue(q.containsAll(Arrays.asList(empty)));
368	<	Integer[] ints = new Integer[1]; ints[0] = zero;
369	<	assertFalse(q.containsAll(Arrays.asList(ints)));
368	>	Item[] items = new Item[1]; items[0] = zero;
369	>	assertFalse(q.containsAll(Arrays.asList(items)));
370		}
371
372		/**
373		* retainAll returns false
374		*/
375	<	public void testRetainAll() {
376	<	SynchronousQueue q = new SynchronousQueue();
377	<	Integer[] empty = new Integer[0];
375	>	public void testRetainAll()      { testRetainAll(false); }
376	>	public void testRetainAll_fair() { testRetainAll(true); }
377	>	public void testRetainAll(boolean fair) {
378	>	final SynchronousQueue<Item> q = new SynchronousQueue<Item>(fair);
379	>	Item[] empty = new Item[0];
380		assertFalse(q.retainAll(Arrays.asList(empty)));
381	<	Integer[] ints = new Integer[1]; ints[0] = zero;
382	<	assertFalse(q.retainAll(Arrays.asList(ints)));
381	>	Item[] items = new Item[1]; items[0] = zero;
382	>	assertFalse(q.retainAll(Arrays.asList(items)));
383		}
384
385		/**
386		* removeAll returns false
387		*/
388	<	public void testRemoveAll() {
389	<	SynchronousQueue q = new SynchronousQueue();
390	<	Integer[] empty = new Integer[0];
388	>	public void testRemoveAll()      { testRemoveAll(false); }
389	>	public void testRemoveAll_fair() { testRemoveAll(true); }
390	>	public void testRemoveAll(boolean fair) {
391	>	final SynchronousQueue<Item> q = new SynchronousQueue<Item>(fair);
392	>	Item[] empty = new Item[0];
393		assertFalse(q.removeAll(Arrays.asList(empty)));
394	<	Integer[] ints = new Integer[1]; ints[0] = zero;
395	<	assertFalse(q.containsAll(Arrays.asList(ints)));
394	>	Item[] items = new Item[1]; items[0] = zero;
395	>	assertFalse(q.containsAll(Arrays.asList(items)));
396		}
397
398		/**
399		* toArray is empty
400		*/
401	<	public void testToArray() {
402	<	SynchronousQueue q = new SynchronousQueue();
401	>	public void testToArray()      { testToArray(false); }
402	>	public void testToArray_fair() { testToArray(true); }
403	>	public void testToArray(boolean fair) {
404	>	final SynchronousQueue<Item> q = new SynchronousQueue<Item>(fair);
405		Object[] o = q.toArray();
406	<	assertEquals(o.length, 0);
406	>	mustEqual(0, o.length);
407		}
408
409		/**
410	<	* toArray(a) is nulled at position 0
410	>	* toArray(Item array) returns its argument with the first
411	>	* element (if present) nulled out
412		*/
413	<	public void testToArray2() {
414	<	SynchronousQueue q = new SynchronousQueue();
415	<	Integer[] ints = new Integer[1];
416	<	assertNull(ints[0]);
413	>	public void testToArray2()      { testToArray2(false); }
414	>	public void testToArray2_fair() { testToArray2(true); }
415	>	public void testToArray2(boolean fair) {
416	>	final SynchronousQueue<Item> q = new SynchronousQueue<Item>(fair);
417	>	Item[] a;
418	>
419	>	a = new Item[0];
420	>	assertSame(a, q.toArray(a));
421	>
422	>	a = new Item[3];
423	>	Arrays.fill(a, fortytwo);
424	>	assertSame(a, q.toArray(a));
425	>	assertNull(a[0]);
426	>	for (int i = 1; i < a.length; i++)
427	>	mustEqual(42, a[i]);
428		}
429
430		/**
431		* toArray(null) throws NPE
432		*/
433	<	public void testToArray_BadArg() {
434	<	SynchronousQueue q = new SynchronousQueue();
433	>	public void testToArray_null()      { testToArray_null(false); }
434	>	public void testToArray_null_fair() { testToArray_null(true); }
435	>	public void testToArray_null(boolean fair) {
436	>	final SynchronousQueue<Item> q = new SynchronousQueue<Item>(fair);
437		try {
438	<	Object o[] = q.toArray(null);
438	>	Object[] unused = q.toArray((Object[])null);
439		shouldThrow();
440		} catch (NullPointerException success) {}
441		}
#	Line 424 | Line 443 | public class SynchronousQueueTest extend
443		/**
444		* iterator does not traverse any elements
445		*/
446	<	public void testIterator() {
447	<	SynchronousQueue q = new SynchronousQueue();
448	<	Iterator it = q.iterator();
449	<	assertFalse(it.hasNext());
431	<	try {
432	<	Object x = it.next();
433	<	shouldThrow();
434	<	} catch (NoSuchElementException success) {}
446	>	public void testIterator()      { testIterator(false); }
447	>	public void testIterator_fair() { testIterator(true); }
448	>	public void testIterator(boolean fair) {
449	>	assertIteratorExhausted(new SynchronousQueue<Item>(fair).iterator());
450		}
451
452		/**
453	<	* iterator remove throws ISE
453	>	* iterator remove throws IllegalStateException
454		*/
455	<	public void testIteratorRemove() {
456	<	SynchronousQueue q = new SynchronousQueue();
457	<	Iterator it = q.iterator();
455	>	public void testIteratorRemove()      { testIteratorRemove(false); }
456	>	public void testIteratorRemove_fair() { testIteratorRemove(true); }
457	>	public void testIteratorRemove(boolean fair) {
458	>	final SynchronousQueue<Item> q = new SynchronousQueue<Item>(fair);
459	>	Iterator<? extends Item> it = q.iterator();
460		try {
461		it.remove();
462		shouldThrow();
#	Line 449 | Line 466 | public class SynchronousQueueTest extend
466		/**
467		* toString returns a non-null string
468		*/
469	<	public void testToString() {
470	<	SynchronousQueue q = new SynchronousQueue();
469	>	public void testToString()      { testToString(false); }
470	>	public void testToString_fair() { testToString(true); }
471	>	public void testToString(boolean fair) {
472	>	final SynchronousQueue<Item> q = new SynchronousQueue<Item>(fair);
473		String s = q.toString();
474		assertNotNull(s);
475		}
#	Line 458 | Line 477 | public class SynchronousQueueTest extend
477		/**
478		* offer transfers elements across Executor tasks
479		*/
480	<	public void testOfferInExecutor() {
481	<	final SynchronousQueue q = new SynchronousQueue();
482	<	ExecutorService executor = Executors.newFixedThreadPool(2);
480	>	public void testOfferInExecutor()      { testOfferInExecutor(false); }
481	>	public void testOfferInExecutor_fair() { testOfferInExecutor(true); }
482	>	public void testOfferInExecutor(boolean fair) {
483	>	final SynchronousQueue<Item> q = new SynchronousQueue<Item>(fair);
484		final CheckedBarrier threadsStarted = new CheckedBarrier(2);
485	+	final ExecutorService executor = Executors.newFixedThreadPool(2);
486	+	try (PoolCleaner cleaner = cleaner(executor)) {
487
488	<	executor.execute(new CheckedRunnable() {
489	<	public void realRun() throws InterruptedException {
490	<	assertFalse(q.offer(one));
491	<	threadsStarted.await();
492	<	assertTrue(q.offer(one, LONG_DELAY_MS, MILLISECONDS));
493	<	assertEquals(0, q.remainingCapacity());
494	<	}});
495	<
496	<	executor.execute(new CheckedRunnable() {
497	<	public void realRun() throws InterruptedException {
498	<	threadsStarted.await();
499	<	assertSame(one, q.take());
500	<	}});
501	<
480	<	joinPool(executor);
488	>	executor.execute(new CheckedRunnable() {
489	>	public void realRun() throws InterruptedException {
490	>	assertFalse(q.offer(one));
491	>	threadsStarted.await();
492	>	assertTrue(q.offer(one, LONG_DELAY_MS, MILLISECONDS));
493	>	mustEqual(0, q.remainingCapacity());
494	>	}});
495	>
496	>	executor.execute(new CheckedRunnable() {
497	>	public void realRun() throws InterruptedException {
498	>	threadsStarted.await();
499	>	assertSame(one, q.take());
500	>	}});
501	>	}
502		}
503
504		/**
505		* timed poll retrieves elements across Executor threads
506		*/
507	<	public void testPollInExecutor() {
508	<	final SynchronousQueue q = new SynchronousQueue();
507	>	public void testPollInExecutor()      { testPollInExecutor(false); }
508	>	public void testPollInExecutor_fair() { testPollInExecutor(true); }
509	>	public void testPollInExecutor(boolean fair) {
510	>	final SynchronousQueue<Item> q = new SynchronousQueue<Item>(fair);
511		final CheckedBarrier threadsStarted = new CheckedBarrier(2);
512	<	ExecutorService executor = Executors.newFixedThreadPool(2);
513	<	executor.execute(new CheckedRunnable() {
514	<	public void realRun() throws InterruptedException {
515	<	assertNull(q.poll());
516	<	threadsStarted.await();
517	<	assertSame(one, q.poll(LONG_DELAY_MS, MILLISECONDS));
518	<	assertTrue(q.isEmpty());
519	<	}});
520	<
521	<	executor.execute(new CheckedRunnable() {
522	<	public void realRun() throws InterruptedException {
523	<	threadsStarted.await();
524	<	q.put(one);
525	<	}});
526	<
527	<	joinPool(executor);
505	<	}
506	<
507	<	/**
508	<	* a deserialized serialized queue is usable
509	<	*/
510	<	public void testSerialization() throws Exception {
511	<	SynchronousQueue q = new SynchronousQueue();
512	<	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
513	<	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
514	<	out.writeObject(q);
515	<	out.close();
516	<
517	<	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
518	<	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
519	<	SynchronousQueue r = (SynchronousQueue)in.readObject();
520	<	assertEquals(q.size(), r.size());
521	<	while (!q.isEmpty())
522	<	assertEquals(q.remove(), r.remove());
523	<	}
524	<
525	<	/**
526	<	* drainTo(null) throws NPE
527	<	*/
528	<	public void testDrainToNull() {
529	<	SynchronousQueue q = new SynchronousQueue();
530	<	try {
531	<	q.drainTo(null);
532	<	shouldThrow();
533	<	} catch (NullPointerException success) {}
512	>	final ExecutorService executor = Executors.newFixedThreadPool(2);
513	>	try (PoolCleaner cleaner = cleaner(executor)) {
514	>	executor.execute(new CheckedRunnable() {
515	>	public void realRun() throws InterruptedException {
516	>	assertNull(q.poll());
517	>	threadsStarted.await();
518	>	assertSame(one, q.poll(LONG_DELAY_MS, MILLISECONDS));
519	>	assertTrue(q.isEmpty());
520	>	}});
521	>
522	>	executor.execute(new CheckedRunnable() {
523	>	public void realRun() throws InterruptedException {
524	>	threadsStarted.await();
525	>	q.put(one);
526	>	}});
527	>	}
528		}
529
530		/**
531	<	* drainTo(this) throws IAE
531	>	* a deserialized/reserialized queue is usable
532		*/
533	<	public void testDrainToSelf() {
534	<	SynchronousQueue q = new SynchronousQueue();
535	<	try {
536	<	q.drainTo(q);
537	<	shouldThrow();
538	<	} catch (IllegalArgumentException success) {}
533	>	public void testSerialization() {
534	>	final SynchronousQueue<Item> x = new SynchronousQueue<Item>();
535	>	final SynchronousQueue<Item> y = new SynchronousQueue<Item>(false);
536	>	final SynchronousQueue<Item> z = new SynchronousQueue<Item>(true);
537	>	assertSerialEquals(x, y);
538	>	assertNotSerialEquals(x, z);
539	>	SynchronousQueue[] rqs = { x, y, z };
540	>	@SuppressWarnings("unchecked")
541	>	SynchronousQueue<Item>[] qs = (SynchronousQueue<Item>[])rqs;
542	>	for (SynchronousQueue<Item> q : qs) {
543	>	SynchronousQueue<Item> clone = serialClone(q);
544	>	assertNotSame(q, clone);
545	>	assertSerialEquals(q, clone);
546	>	assertTrue(clone.isEmpty());
547	>	mustEqual(0, clone.size());
548	>	mustEqual(0, clone.remainingCapacity());
549	>	assertFalse(clone.offer(zero));
550	>	}
551		}
552
553		/**
554		* drainTo(c) of empty queue doesn't transfer elements
555		*/
556	<	public void testDrainTo() {
557	<	SynchronousQueue q = new SynchronousQueue();
558	<	ArrayList l = new ArrayList();
556	>	public void testDrainTo()      { testDrainTo(false); }
557	>	public void testDrainTo_fair() { testDrainTo(true); }
558	>	public void testDrainTo(boolean fair) {
559	>	final SynchronousQueue<Item> q = new SynchronousQueue<Item>(fair);
560	>	ArrayList<Item> l = new ArrayList<Item>();
561		q.drainTo(l);
562	<	assertEquals(q.size(), 0);
563	<	assertEquals(l.size(), 0);
562	>	mustEqual(0, q.size());
563	>	mustEqual(0, l.size());
564		}
565
566		/**
567		* drainTo empties queue, unblocking a waiting put.
568		*/
569	<	public void testDrainToWithActivePut() throws InterruptedException {
570	<	final SynchronousQueue q = new SynchronousQueue();
569	>	public void testDrainToWithActivePut()      { testDrainToWithActivePut(false); }
570	>	public void testDrainToWithActivePut_fair() { testDrainToWithActivePut(true); }
571	>	public void testDrainToWithActivePut(boolean fair) {
572	>	final SynchronousQueue<Item> q = new SynchronousQueue<Item>(fair);
573		Thread t = newStartedThread(new CheckedRunnable() {
574		public void realRun() throws InterruptedException {
575		q.put(one);
576		}});
577
578	<	ArrayList l = new ArrayList();
578	>	ArrayList<Item> l = new ArrayList<Item>();
579		long startTime = System.nanoTime();
580		while (l.isEmpty()) {
581		q.drainTo(l);
#	Line 573 | Line 583 | public class SynchronousQueueTest extend
583		fail("timed out");
584		Thread.yield();
585		}
586	<	assertTrue(l.size() == 1);
586	>	mustEqual(1, l.size());
587		assertSame(one, l.get(0));
588		awaitTermination(t);
589		}
590
591		/**
582	–	* drainTo(null, n) throws NPE
583	–	*/
584	–	public void testDrainToNullN() {
585	–	SynchronousQueue q = new SynchronousQueue();
586	–	try {
587	–	q.drainTo(null, 0);
588	–	shouldThrow();
589	–	} catch (NullPointerException success) {}
590	–	}
591	–
592	–	/**
593	–	* drainTo(this, n) throws IAE
594	–	*/
595	–	public void testDrainToSelfN() {
596	–	SynchronousQueue q = new SynchronousQueue();
597	–	try {
598	–	q.drainTo(q, 0);
599	–	shouldThrow();
600	–	} catch (IllegalArgumentException success) {}
601	–	}
602	–
603	–	/**
592		* drainTo(c, n) empties up to n elements of queue into c
593		*/
594		public void testDrainToN() throws InterruptedException {
595	<	final SynchronousQueue q = new SynchronousQueue();
595	>	final SynchronousQueue<Item> q = new SynchronousQueue<Item>();
596		Thread t1 = newStartedThread(new CheckedRunnable() {
597		public void realRun() throws InterruptedException {
598		q.put(one);
#	Line 615 | Line 603 | public class SynchronousQueueTest extend
603		q.put(two);
604		}});
605
606	<	ArrayList l = new ArrayList();
607	<	delay(SHORT_DELAY_MS);
608	<	q.drainTo(l, 1);
609	<	assertEquals(1, l.size());
610	<	q.drainTo(l, 1);
611	<	assertEquals(2, l.size());
606	>	ArrayList<Item> l = new ArrayList<Item>();
607	>	int drained;
608	>	while ((drained = q.drainTo(l, 1)) == 0) Thread.yield();
609	>	mustEqual(1, drained);
610	>	mustEqual(1, l.size());
611	>	while ((drained = q.drainTo(l, 1)) == 0) Thread.yield();
612	>	mustEqual(1, drained);
613	>	mustEqual(2, l.size());
614		assertTrue(l.contains(one));
615		assertTrue(l.contains(two));
616		awaitTermination(t1);
617		awaitTermination(t2);
618		}
619
620	+	/**
621	+	* remove(null), contains(null) always return false
622	+	*/
623	+	public void testNeverContainsNull() {
624	+	Collection<?> q = new SynchronousQueue<Item>();
625	+	assertFalse(q.contains(null));
626	+	assertFalse(q.remove(null));
627	+	}
628	+
629		}

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