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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 1.55 by jsr166, Sat May 13 22:38:09 2017 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 50 | Line 59 | public class SynchronousQueueTest extend
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 q = new SynchronousQueue(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 q = new SynchronousQueue(fair);
78	>	assertEquals(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 q = new SynchronousQueue(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		/**
117	–	* 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	–	/**
99		* addAll throws ISE 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 q = new SynchronousQueue(fair);
105	>	Integer[] ints = new Integer[1];
106	>	for (int i = 0; i < ints.length; i++)
107	>	ints[i] = i;
108	>	Collection<Integer> coll = Arrays.asList(ints);
109		try {
110	<	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));
110	>	q.addAll(coll);
111		shouldThrow();
112		} catch (IllegalStateException success) {}
113		}
114
115		/**
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	–	/**
116		* put blocks interruptibly if no active taker
117		*/
118		public void testBlockingPut()      { testBlockingPut(false); }
#	Line 176 | Line 138 | public class SynchronousQueueTest extend
138		}});
139
140		await(pleaseInterrupt);
141	<	assertThreadStaysAlive(t);
141	>	assertThreadBlocks(t, Thread.State.WAITING);
142		t.interrupt();
143		awaitTermination(t);
144		assertEquals(0, q.remainingCapacity());
#	Line 205 | Line 167 | public class SynchronousQueueTest extend
167		}});
168
169		await(pleaseTake);
170	<	assertEquals(q.remainingCapacity(), 0);
170	>	assertEquals(0, q.remainingCapacity());
171		try { assertSame(one, q.take()); }
172		catch (InterruptedException e) { threadUnexpectedException(e); }
173
174		await(pleaseInterrupt);
175	<	assertThreadStaysAlive(t);
175	>	assertThreadBlocks(t, Thread.State.WAITING);
176		t.interrupt();
177		awaitTermination(t);
178	<	assertEquals(q.remainingCapacity(), 0);
178	>	assertEquals(0, q.remainingCapacity());
179		}
180
181		/**
#	Line 237 | Line 199 | public class SynchronousQueueTest extend
199		}});
200
201		await(pleaseInterrupt);
202	<	assertThreadStaysAlive(t);
202	>	assertThreadBlocks(t, Thread.State.TIMED_WAITING);
203		t.interrupt();
204		awaitTermination(t);
205		}
#	Line 245 | Line 207 | public class SynchronousQueueTest extend
207		/**
208		* poll return null if no active putter
209		*/
210	<	public void testPoll() {
211	<	SynchronousQueue q = new SynchronousQueue();
210	>	public void testPoll()      { testPoll(false); }
211	>	public void testPoll_fair() { testPoll(true); }
212	>	public void testPoll(boolean fair) {
213	>	final SynchronousQueue q = new SynchronousQueue(fair);
214		assertNull(q.poll());
215		}
216
217		/**
218		* timed poll with zero timeout times out if no active putter
219		*/
220	<	public void testTimedPoll0() throws InterruptedException {
221	<	SynchronousQueue q = new SynchronousQueue();
222	<	assertNull(q.poll(0, MILLISECONDS));
220	>	public void testTimedPoll0()      { testTimedPoll0(false); }
221	>	public void testTimedPoll0_fair() { testTimedPoll0(true); }
222	>	public void testTimedPoll0(boolean fair) {
223	>	final SynchronousQueue q = new SynchronousQueue(fair);
224	>	try { assertNull(q.poll(0, MILLISECONDS)); }
225	>	catch (InterruptedException e) { threadUnexpectedException(e); }
226		}
227
228		/**
229		* timed poll with nonzero timeout times out if no active putter
230		*/
231	<	public void testTimedPoll() throws InterruptedException {
232	<	SynchronousQueue q = new SynchronousQueue();
231	>	public void testTimedPoll()      { testTimedPoll(false); }
232	>	public void testTimedPoll_fair() { testTimedPoll(true); }
233	>	public void testTimedPoll(boolean fair) {
234	>	final SynchronousQueue q = new SynchronousQueue(fair);
235		long startTime = System.nanoTime();
236	<	assertNull(q.poll(timeoutMillis(), MILLISECONDS));
236	>	try { assertNull(q.poll(timeoutMillis(), MILLISECONDS)); }
237	>	catch (InterruptedException e) { threadUnexpectedException(e); }
238		assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
239		}
240
#	Line 272 | Line 242 | public class SynchronousQueueTest extend
242		* timed poll before a delayed offer times out, returning null;
243		* after offer succeeds; on interruption throws
244		*/
245	<	public void testFairTimedPollWithOffer() throws InterruptedException {
246	<	final SynchronousQueue q = new SynchronousQueue(true);
245	>	public void testTimedPollWithOffer()      { testTimedPollWithOffer(false); }
246	>	public void testTimedPollWithOffer_fair() { testTimedPollWithOffer(true); }
247	>	public void testTimedPollWithOffer(boolean fair) {
248	>	final SynchronousQueue q = new SynchronousQueue(fair);
249		final CountDownLatch pleaseOffer = new CountDownLatch(1);
250	+	final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
251		Thread t = newStartedThread(new CheckedRunnable() {
252		public void realRun() throws InterruptedException {
253	<	long t0 = System.nanoTime();
254	<	assertNull(q.poll(SHORT_DELAY_MS, MILLISECONDS));
255	<	assertTrue(millisElapsedSince(t0) >= SHORT_DELAY_MS);
253	>	long startTime = System.nanoTime();
254	>	assertNull(q.poll(timeoutMillis(), MILLISECONDS));
255	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
256
257		pleaseOffer.countDown();
258	<	t0 = System.nanoTime();
258	>	startTime = System.nanoTime();
259		assertSame(zero, q.poll(LONG_DELAY_MS, MILLISECONDS));
287	–	assertTrue(millisElapsedSince(t0) < MEDIUM_DELAY_MS);
260
261	<	t0 = System.nanoTime();
261	>	Thread.currentThread().interrupt();
262	>	try {
263	>	q.poll(LONG_DELAY_MS, MILLISECONDS);
264	>	shouldThrow();
265	>	} catch (InterruptedException success) {}
266	>	assertFalse(Thread.interrupted());
267	>
268	>	pleaseInterrupt.countDown();
269		try {
270		q.poll(LONG_DELAY_MS, MILLISECONDS);
271		shouldThrow();
272		} catch (InterruptedException success) {}
273	<	assertTrue(millisElapsedSince(t0) < MEDIUM_DELAY_MS);
273	>	assertFalse(Thread.interrupted());
274	>
275	>	assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS);
276		}});
277
278	<	assertTrue(pleaseOffer.await(MEDIUM_DELAY_MS, MILLISECONDS));
279	<	long t0 = System.nanoTime();
280	<	assertTrue(q.offer(zero, LONG_DELAY_MS, MILLISECONDS));
281	<	assertTrue(millisElapsedSince(t0) < MEDIUM_DELAY_MS);
278	>	await(pleaseOffer);
279	>	long startTime = System.nanoTime();
280	>	try { assertTrue(q.offer(zero, LONG_DELAY_MS, MILLISECONDS)); }
281	>	catch (InterruptedException e) { threadUnexpectedException(e); }
282	>	assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS);
283
284	+	await(pleaseInterrupt);
285	+	assertThreadBlocks(t, Thread.State.TIMED_WAITING);
286		t.interrupt();
287	<	awaitTermination(t, MEDIUM_DELAY_MS);
287	>	awaitTermination(t);
288		}
289
290		/**
291		* peek() returns null if no active putter
292		*/
293	<	public void testPeek() {
294	<	SynchronousQueue q = new SynchronousQueue();
293	>	public void testPeek()      { testPeek(false); }
294	>	public void testPeek_fair() { testPeek(true); }
295	>	public void testPeek(boolean fair) {
296	>	final SynchronousQueue q = new SynchronousQueue(fair);
297		assertNull(q.peek());
298		}
299
300		/**
301	<	* element() throws NSEE if no active putter
301	>	* element() throws NoSuchElementException if no active putter
302		*/
303	<	public void testElement() {
304	<	SynchronousQueue q = new SynchronousQueue();
303	>	public void testElement()      { testElement(false); }
304	>	public void testElement_fair() { testElement(true); }
305	>	public void testElement(boolean fair) {
306	>	final SynchronousQueue q = new SynchronousQueue(fair);
307		try {
308		q.element();
309		shouldThrow();
#	Line 323 | Line 311 | public class SynchronousQueueTest extend
311		}
312
313		/**
314	<	* remove() throws NSEE if no active putter
314	>	* remove() throws NoSuchElementException if no active putter
315		*/
316	<	public void testRemove() {
317	<	SynchronousQueue q = new SynchronousQueue();
316	>	public void testRemove()      { testRemove(false); }
317	>	public void testRemove_fair() { testRemove(true); }
318	>	public void testRemove(boolean fair) {
319	>	final SynchronousQueue q = new SynchronousQueue(fair);
320		try {
321		q.remove();
322		shouldThrow();
#	Line 334 | Line 324 | public class SynchronousQueueTest extend
324		}
325
326		/**
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	–	/**
327		* contains returns false
328		*/
329	<	public void testContains() {
330	<	SynchronousQueue q = new SynchronousQueue();
329	>	public void testContains()      { testContains(false); }
330	>	public void testContains_fair() { testContains(true); }
331	>	public void testContains(boolean fair) {
332	>	final SynchronousQueue q = new SynchronousQueue(fair);
333		assertFalse(q.contains(zero));
334		}
335
336		/**
337		* clear ensures isEmpty
338		*/
339	<	public void testClear() {
340	<	SynchronousQueue q = new SynchronousQueue();
339	>	public void testClear()      { testClear(false); }
340	>	public void testClear_fair() { testClear(true); }
341	>	public void testClear(boolean fair) {
342	>	final SynchronousQueue q = new SynchronousQueue(fair);
343		q.clear();
344		assertTrue(q.isEmpty());
345		}
#	Line 362 | Line 347 | public class SynchronousQueueTest extend
347		/**
348		* containsAll returns false unless empty
349		*/
350	<	public void testContainsAll() {
351	<	SynchronousQueue q = new SynchronousQueue();
350	>	public void testContainsAll()      { testContainsAll(false); }
351	>	public void testContainsAll_fair() { testContainsAll(true); }
352	>	public void testContainsAll(boolean fair) {
353	>	final SynchronousQueue q = new SynchronousQueue(fair);
354		Integer[] empty = new Integer[0];
355		assertTrue(q.containsAll(Arrays.asList(empty)));
356		Integer[] ints = new Integer[1]; ints[0] = zero;
#	Line 373 | Line 360 | public class SynchronousQueueTest extend
360		/**
361		* retainAll returns false
362		*/
363	<	public void testRetainAll() {
364	<	SynchronousQueue q = new SynchronousQueue();
363	>	public void testRetainAll()      { testRetainAll(false); }
364	>	public void testRetainAll_fair() { testRetainAll(true); }
365	>	public void testRetainAll(boolean fair) {
366	>	final SynchronousQueue q = new SynchronousQueue(fair);
367		Integer[] empty = new Integer[0];
368		assertFalse(q.retainAll(Arrays.asList(empty)));
369		Integer[] ints = new Integer[1]; ints[0] = zero;
#	Line 384 | Line 373 | public class SynchronousQueueTest extend
373		/**
374		* removeAll returns false
375		*/
376	<	public void testRemoveAll() {
377	<	SynchronousQueue q = new SynchronousQueue();
376	>	public void testRemoveAll()      { testRemoveAll(false); }
377	>	public void testRemoveAll_fair() { testRemoveAll(true); }
378	>	public void testRemoveAll(boolean fair) {
379	>	final SynchronousQueue q = new SynchronousQueue(fair);
380		Integer[] empty = new Integer[0];
381		assertFalse(q.removeAll(Arrays.asList(empty)));
382		Integer[] ints = new Integer[1]; ints[0] = zero;
#	Line 395 | Line 386 | public class SynchronousQueueTest extend
386		/**
387		* toArray is empty
388		*/
389	<	public void testToArray() {
390	<	SynchronousQueue q = new SynchronousQueue();
389	>	public void testToArray()      { testToArray(false); }
390	>	public void testToArray_fair() { testToArray(true); }
391	>	public void testToArray(boolean fair) {
392	>	final SynchronousQueue q = new SynchronousQueue(fair);
393		Object[] o = q.toArray();
394	<	assertEquals(o.length, 0);
394	>	assertEquals(0, o.length);
395		}
396
397		/**
398	<	* toArray(a) is nulled at position 0
398	>	* toArray(Integer array) returns its argument with the first
399	>	* element (if present) nulled out
400		*/
401	<	public void testToArray2() {
402	<	SynchronousQueue q = new SynchronousQueue();
403	<	Integer[] ints = new Integer[1];
404	<	assertNull(ints[0]);
401	>	public void testToArray2()      { testToArray2(false); }
402	>	public void testToArray2_fair() { testToArray2(true); }
403	>	public void testToArray2(boolean fair) {
404	>	final SynchronousQueue<Integer> q = new SynchronousQueue<>(fair);
405	>	Integer[] a;
406	>
407	>	a = new Integer[0];
408	>	assertSame(a, q.toArray(a));
409	>
410	>	a = new Integer[3];
411	>	Arrays.fill(a, 42);
412	>	assertSame(a, q.toArray(a));
413	>	assertNull(a[0]);
414	>	for (int i = 1; i < a.length; i++)
415	>	assertEquals(42, (int) a[i]);
416		}
417
418		/**
419		* toArray(null) throws NPE
420		*/
421	<	public void testToArray_BadArg() {
422	<	SynchronousQueue q = new SynchronousQueue();
421	>	public void testToArray_null()      { testToArray_null(false); }
422	>	public void testToArray_null_fair() { testToArray_null(true); }
423	>	public void testToArray_null(boolean fair) {
424	>	final SynchronousQueue q = new SynchronousQueue(fair);
425		try {
426	<	Object o[] = q.toArray(null);
426	>	Object[] o = q.toArray(null);
427		shouldThrow();
428		} catch (NullPointerException success) {}
429		}
#	Line 424 | Line 431 | public class SynchronousQueueTest extend
431		/**
432		* iterator does not traverse any elements
433		*/
434	<	public void testIterator() {
435	<	SynchronousQueue q = new SynchronousQueue();
436	<	Iterator it = q.iterator();
437	<	assertFalse(it.hasNext());
431	<	try {
432	<	Object x = it.next();
433	<	shouldThrow();
434	<	} catch (NoSuchElementException success) {}
434	>	public void testIterator()      { testIterator(false); }
435	>	public void testIterator_fair() { testIterator(true); }
436	>	public void testIterator(boolean fair) {
437	>	assertIteratorExhausted(new SynchronousQueue(fair).iterator());
438		}
439
440		/**
441		* iterator remove throws ISE
442		*/
443	<	public void testIteratorRemove() {
444	<	SynchronousQueue q = new SynchronousQueue();
443	>	public void testIteratorRemove()      { testIteratorRemove(false); }
444	>	public void testIteratorRemove_fair() { testIteratorRemove(true); }
445	>	public void testIteratorRemove(boolean fair) {
446	>	final SynchronousQueue q = new SynchronousQueue(fair);
447		Iterator it = q.iterator();
448		try {
449		it.remove();
#	Line 449 | Line 454 | public class SynchronousQueueTest extend
454		/**
455		* toString returns a non-null string
456		*/
457	<	public void testToString() {
458	<	SynchronousQueue q = new SynchronousQueue();
457	>	public void testToString()      { testToString(false); }
458	>	public void testToString_fair() { testToString(true); }
459	>	public void testToString(boolean fair) {
460	>	final SynchronousQueue q = new SynchronousQueue(fair);
461		String s = q.toString();
462		assertNotNull(s);
463		}
#	Line 458 | Line 465 | public class SynchronousQueueTest extend
465		/**
466		* offer transfers elements across Executor tasks
467		*/
468	<	public void testOfferInExecutor() {
469	<	final SynchronousQueue q = new SynchronousQueue();
470	<	ExecutorService executor = Executors.newFixedThreadPool(2);
468	>	public void testOfferInExecutor()      { testOfferInExecutor(false); }
469	>	public void testOfferInExecutor_fair() { testOfferInExecutor(true); }
470	>	public void testOfferInExecutor(boolean fair) {
471	>	final SynchronousQueue q = new SynchronousQueue(fair);
472		final CheckedBarrier threadsStarted = new CheckedBarrier(2);
473	+	final ExecutorService executor = Executors.newFixedThreadPool(2);
474	+	try (PoolCleaner cleaner = cleaner(executor)) {
475
476	<	executor.execute(new CheckedRunnable() {
477	<	public void realRun() throws InterruptedException {
478	<	assertFalse(q.offer(one));
479	<	threadsStarted.await();
480	<	assertTrue(q.offer(one, LONG_DELAY_MS, MILLISECONDS));
481	<	assertEquals(0, q.remainingCapacity());
482	<	}});
483	<
484	<	executor.execute(new CheckedRunnable() {
485	<	public void realRun() throws InterruptedException {
486	<	threadsStarted.await();
487	<	assertSame(one, q.take());
488	<	}});
489	<
480	<	joinPool(executor);
476	>	executor.execute(new CheckedRunnable() {
477	>	public void realRun() throws InterruptedException {
478	>	assertFalse(q.offer(one));
479	>	threadsStarted.await();
480	>	assertTrue(q.offer(one, LONG_DELAY_MS, MILLISECONDS));
481	>	assertEquals(0, q.remainingCapacity());
482	>	}});
483	>
484	>	executor.execute(new CheckedRunnable() {
485	>	public void realRun() throws InterruptedException {
486	>	threadsStarted.await();
487	>	assertSame(one, q.take());
488	>	}});
489	>	}
490		}
491
492		/**
493		* timed poll retrieves elements across Executor threads
494		*/
495	<	public void testPollInExecutor() {
496	<	final SynchronousQueue q = new SynchronousQueue();
495	>	public void testPollInExecutor()      { testPollInExecutor(false); }
496	>	public void testPollInExecutor_fair() { testPollInExecutor(true); }
497	>	public void testPollInExecutor(boolean fair) {
498	>	final SynchronousQueue q = new SynchronousQueue(fair);
499		final CheckedBarrier threadsStarted = new CheckedBarrier(2);
500	<	ExecutorService executor = Executors.newFixedThreadPool(2);
501	<	executor.execute(new CheckedRunnable() {
502	<	public void realRun() throws InterruptedException {
503	<	assertNull(q.poll());
504	<	threadsStarted.await();
505	<	assertSame(one, q.poll(LONG_DELAY_MS, MILLISECONDS));
506	<	assertTrue(q.isEmpty());
507	<	}});
508	<
509	<	executor.execute(new CheckedRunnable() {
510	<	public void realRun() throws InterruptedException {
511	<	threadsStarted.await();
512	<	q.put(one);
513	<	}});
514	<
515	<	joinPool(executor);
500	>	final ExecutorService executor = Executors.newFixedThreadPool(2);
501	>	try (PoolCleaner cleaner = cleaner(executor)) {
502	>	executor.execute(new CheckedRunnable() {
503	>	public void realRun() throws InterruptedException {
504	>	assertNull(q.poll());
505	>	threadsStarted.await();
506	>	assertSame(one, q.poll(LONG_DELAY_MS, MILLISECONDS));
507	>	assertTrue(q.isEmpty());
508	>	}});
509	>
510	>	executor.execute(new CheckedRunnable() {
511	>	public void realRun() throws InterruptedException {
512	>	threadsStarted.await();
513	>	q.put(one);
514	>	}});
515	>	}
516		}
517
518		/**
519		* a deserialized serialized queue is usable
520		*/
521	<	public void testSerialization() throws Exception {
522	<	SynchronousQueue q = new SynchronousQueue();
523	<	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
524	<	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
525	<	out.writeObject(q);
526	<	out.close();
527	<
528	<	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
529	<	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
530	<	SynchronousQueue r = (SynchronousQueue)in.readObject();
531	<	assertEquals(q.size(), r.size());
532	<	while (!q.isEmpty())
533	<	assertEquals(q.remove(), r.remove());
534	<	}
535	<
536	<	/**
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) {}
534	<	}
535	<
536	<	/**
537	<	* drainTo(this) throws IAE
538	<	*/
539	<	public void testDrainToSelf() {
540	<	SynchronousQueue q = new SynchronousQueue();
541	<	try {
542	<	q.drainTo(q);
543	<	shouldThrow();
544	<	} catch (IllegalArgumentException success) {}
521	>	public void testSerialization() {
522	>	final SynchronousQueue x = new SynchronousQueue();
523	>	final SynchronousQueue y = new SynchronousQueue(false);
524	>	final SynchronousQueue z = new SynchronousQueue(true);
525	>	assertSerialEquals(x, y);
526	>	assertNotSerialEquals(x, z);
527	>	SynchronousQueue[] qs = { x, y, z };
528	>	for (SynchronousQueue q : qs) {
529	>	SynchronousQueue clone = serialClone(q);
530	>	assertNotSame(q, clone);
531	>	assertSerialEquals(q, clone);
532	>	assertTrue(clone.isEmpty());
533	>	assertEquals(0, clone.size());
534	>	assertEquals(0, clone.remainingCapacity());
535	>	assertFalse(clone.offer(zero));
536	>	}
537		}
538
539		/**
540		* drainTo(c) of empty queue doesn't transfer elements
541		*/
542	<	public void testDrainTo() {
543	<	SynchronousQueue q = new SynchronousQueue();
542	>	public void testDrainTo()      { testDrainTo(false); }
543	>	public void testDrainTo_fair() { testDrainTo(true); }
544	>	public void testDrainTo(boolean fair) {
545	>	final SynchronousQueue q = new SynchronousQueue(fair);
546		ArrayList l = new ArrayList();
547		q.drainTo(l);
548	<	assertEquals(q.size(), 0);
549	<	assertEquals(l.size(), 0);
548	>	assertEquals(0, q.size());
549	>	assertEquals(0, l.size());
550		}
551
552		/**
553		* drainTo empties queue, unblocking a waiting put.
554		*/
555	<	public void testDrainToWithActivePut() throws InterruptedException {
556	<	final SynchronousQueue q = new SynchronousQueue();
555	>	public void testDrainToWithActivePut()      { testDrainToWithActivePut(false); }
556	>	public void testDrainToWithActivePut_fair() { testDrainToWithActivePut(true); }
557	>	public void testDrainToWithActivePut(boolean fair) {
558	>	final SynchronousQueue q = new SynchronousQueue(fair);
559		Thread t = newStartedThread(new CheckedRunnable() {
560		public void realRun() throws InterruptedException {
561		q.put(one);
#	Line 573 | Line 569 | public class SynchronousQueueTest extend
569		fail("timed out");
570		Thread.yield();
571		}
572	<	assertTrue(l.size() == 1);
572	>	assertEquals(1, l.size());
573		assertSame(one, l.get(0));
574		awaitTermination(t);
575		}
576
577		/**
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	–	/**
578		* drainTo(c, n) empties up to n elements of queue into c
579		*/
580		public void testDrainToN() throws InterruptedException {
#	Line 616 | Line 590 | public class SynchronousQueueTest extend
590		}});
591
592		ArrayList l = new ArrayList();
593	<	delay(SHORT_DELAY_MS);
594	<	q.drainTo(l, 1);
593	>	int drained;
594	>	while ((drained = q.drainTo(l, 1)) == 0) Thread.yield();
595	>	assertEquals(1, drained);
596		assertEquals(1, l.size());
597	<	q.drainTo(l, 1);
597	>	while ((drained = q.drainTo(l, 1)) == 0) Thread.yield();
598	>	assertEquals(1, drained);
599		assertEquals(2, l.size());
600		assertTrue(l.contains(one));
601		assertTrue(l.contains(two));
#	Line 627 | Line 603 | public class SynchronousQueueTest extend
603		awaitTermination(t2);
604		}
605
606	+	/**
607	+	* remove(null), contains(null) always return false
608	+	*/
609	+	public void testNeverContainsNull() {
610	+	Collection<?> q = new SynchronousQueue();
611	+	assertFalse(q.contains(null));
612	+	assertFalse(q.remove(null));
613	+	}
614	+
615		}

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