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root/jsr166/jsr166/src/test/tck/SynchronousQueueTest.java

Comparing jsr166/src/test/tck/SynchronousQueueTest.java (file contents):
Revision 1.1 by dl, Sun Aug 31 19:24:55 2003 UTC vs.
Revision 1.35 by jsr166, Fri May 27 20:07:24 2011 UTC

#	Line 1 | Line 1
1		/*
2	<	* Written by members of JCP JSR-166 Expert Group and released to the
3	<	* public domain. Use, modify, and redistribute this code in any way
4	<	* without acknowledgement. Other contributors include Andrew Wright,
5	<	* Jeffrey Hayes, Pat Fischer, Mike Judd.
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/publicdomain/zero/1.0/
5	>	* Other contributors include Andrew Wright, Jeffrey Hayes,
6	>	* Pat Fisher, Mike Judd.
7		*/
8
9		import junit.framework.*;
10		import java.util.*;
11		import java.util.concurrent.*;
12	+	import static java.util.concurrent.TimeUnit.MILLISECONDS;
13	+	import java.io.*;
14
15	<	public class SynchronousQueueTest extends TestCase {
15	>	public class SynchronousQueueTest extends JSR166TestCase {
16
17	<	private final static int N = 1;
18	<	private static long SHORT_DELAY_MS = 100;
19	<	private static long MEDIUM_DELAY_MS = 1000;
20	<	private static long LONG_DELAY_MS = 10000;
17	>	public static class Fair extends BlockingQueueTest {
18	>	protected BlockingQueue emptyCollection() {
19	>	return new SynchronousQueue(true);
20	>	}
21	>	}
22	>
23	>	public static class NonFair extends BlockingQueueTest {
24	>	protected BlockingQueue emptyCollection() {
25	>	return new SynchronousQueue(false);
26	>	}
27	>	}
28
29		public static void main(String[] args) {
30	<	junit.textui.TestRunner.run (suite());
30	>	junit.textui.TestRunner.run(suite());
31		}
32
33		public static Test suite() {
34	<	return new TestSuite(SynchronousQueueTest.class);
34	>	return newTestSuite(SynchronousQueueTest.class,
35	>	new Fair().testSuite(),
36	>	new NonFair().testSuite());
37		}
38
39	<	public void testEmptyFull() {
40	<	SynchronousQueue q = new SynchronousQueue();
39	>	/**
40	>	* Any SynchronousQueue is both empty and full
41	>	*/
42	>	public void testEmptyFull()      { testEmptyFull(false); }
43	>	public void testEmptyFull_fair() { testEmptyFull(true); }
44	>	public void testEmptyFull(boolean fair) {
45	>	final SynchronousQueue q = new SynchronousQueue(fair);
46		assertTrue(q.isEmpty());
47	<	assertEquals(0, q.size());
47	>	assertEquals(0, q.size());
48		assertEquals(0, q.remainingCapacity());
49	<	assertFalse(q.offer(new Integer(3)));
49	>	assertFalse(q.offer(zero));
50		}
51
52	<	public void testOfferNull(){
53	<	try {
52	>	/**
53	>	* offer(null) throws NPE
54	>	*/
55	>	public void testOfferNull() {
56	>	try {
57		SynchronousQueue q = new SynchronousQueue();
58		q.offer(null);
59	<	fail("should throw NPE");
60	<	} catch (NullPointerException success) { }
59	>	shouldThrow();
60	>	} catch (NullPointerException success) {}
61		}
62
63	<	public void testOffer(){
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	>	/**
75	>	* offer fails if no active taker
76	>	*/
77	>	public void testOffer() {
78		SynchronousQueue q = new SynchronousQueue();
79	<	assertFalse(q.offer(new Integer(1)));
79	>	assertFalse(q.offer(one));
80		}
81
82	<	public void testAdd(){
83	<	try {
82	>	/**
83	>	* add throws ISE if no active taker
84	>	*/
85	>	public void testAdd() {
86	>	try {
87		SynchronousQueue q = new SynchronousQueue();
88		assertEquals(0, q.remainingCapacity());
89	<	q.add(new Integer(0));
90	<	} catch (IllegalStateException success){
91	<	}
89	>	q.add(one);
90	>	shouldThrow();
91	>	} catch (IllegalStateException success) {}
92		}
93
94	<	public void testAddAll1(){
94	>	/**
95	>	* addAll(null) throws NPE
96	>	*/
97	>	public void testAddAll1() {
98		try {
99		SynchronousQueue q = new SynchronousQueue();
100		q.addAll(null);
101	<	fail("Cannot add null collection");
102	<	}
63	<	catch (NullPointerException success) {}
101	>	shouldThrow();
102	>	} catch (NullPointerException success) {}
103		}
104	<	public void testAddAll2(){
104	>
105	>	/**
106	>	* addAll(this) throws IAE
107	>	*/
108	>	public void testAddAllSelf() {
109		try {
110		SynchronousQueue q = new SynchronousQueue();
111	<	Integer[] ints = new Integer[N];
111	>	q.addAll(q);
112	>	shouldThrow();
113	>	} catch (IllegalArgumentException success) {}
114	>	}
115	>
116	>	/**
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	<	fail("Cannot add null elements");
125	<	}
72	<	catch (NullPointerException success) {}
124	>	shouldThrow();
125	>	} catch (NullPointerException success) {}
126		}
127	<	public void testAddAll4(){
127	>
128	>	/**
129	>	* addAll throws ISE if no active taker
130	>	*/
131	>	public void testAddAll4() {
132		try {
133		SynchronousQueue q = new SynchronousQueue();
134	<	Integer[] ints = new Integer[N];
135	<	for (int i = 0; i < N; ++i)
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));
138	<	fail("Cannot add with insufficient capacity");
139	<	}
83	<	catch (IllegalStateException success) {}
138	>	shouldThrow();
139	>	} catch (IllegalStateException success) {}
140		}
141
142	<	public void testPutNull() {
143	<	try {
142	>	/**
143	>	* put(null) throws NPE
144	>	*/
145	>	public void testPutNull() throws InterruptedException {
146	>	try {
147		SynchronousQueue q = new SynchronousQueue();
148		q.put(null);
149	<	fail("put should throw NPE");
150	<	}
92	<	catch (NullPointerException success){
93	<	}
94	<	catch (InterruptedException ie) {
95	<	fail("Unexpected exception");
96	<	}
97	<	}
98	<
99	<	public void testBlockingPut(){
100	<	Thread t = new Thread(new Runnable() {
101	<	public void run() {
102	<	try {
103	<	SynchronousQueue q = new SynchronousQueue();
104	<	q.put(new Integer(0));
105	<	fail("put should block");
106	<	} catch (InterruptedException ie){
107	<	}
108	<	}});
109	<	t.start();
110	<	try {
111	<	Thread.sleep(SHORT_DELAY_MS);
112	<	t.interrupt();
113	<	t.join();
114	<	}
115	<	catch (InterruptedException ie) {
116	<	fail("Unexpected exception");
117	<	}
149	>	shouldThrow();
150	>	} catch (NullPointerException success) {}
151		}
152
153	<	public void testPutWithTake() {
154	<	final SynchronousQueue q = new SynchronousQueue();
155	<	Thread t = new Thread(new Runnable() {
156	<	public void run(){
157	<	int added = 0;
158	<	try {
159	<	q.put(new Object());
160	<	++added;
161	<	q.put(new Object());
162	<	++added;
163	<	q.put(new Object());
164	<	++added;
165	<	q.put(new Object());
166	<	++added;
167	<	fail("Should block");
168	<	} catch (InterruptedException e){
136	<	assertTrue(added >= 1);
137	<	}
138	<	}
139	<	});
140	<	try {
141	<	t.start();
142	<	Thread.sleep(SHORT_DELAY_MS);
143	<	q.take();
144	<	Thread.sleep(SHORT_DELAY_MS);
145	<	t.interrupt();
146	<	t.join();
147	<	} catch (Exception e){
148	<	fail("Unexpected exception");
149	<	}
150	<	}
153	>	/**
154	>	* put blocks interruptibly if no active taker
155	>	*/
156	>	public void testBlockingPut()      { testBlockingPut(false); }
157	>	public void testBlockingPut_fair() { testBlockingPut(true); }
158	>	public void testBlockingPut(boolean fair) {
159	>	final SynchronousQueue q = new SynchronousQueue(fair);
160	>	final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
161	>	Thread t = newStartedThread(new CheckedRunnable() {
162	>	public void realRun() throws InterruptedException {
163	>	Thread.currentThread().interrupt();
164	>	try {
165	>	q.put(99);
166	>	shouldThrow();
167	>	} catch (InterruptedException success) {}
168	>	assertFalse(Thread.interrupted());
169
170	<	public void testTimedOffer() {
171	<	final SynchronousQueue q = new SynchronousQueue();
172	<	Thread t = new Thread(new Runnable() {
173	<	public void run(){
174	<	try {
175	<
176	<	assertFalse(q.offer(new Object(), SHORT_DELAY_MS/2, TimeUnit.MILLISECONDS));
177	<	q.offer(new Object(), LONG_DELAY_MS, TimeUnit.MILLISECONDS);
178	<	fail("Should block");
179	<	} catch (InterruptedException success){}
180	<	}
181	<	});
182	<
165	<	try {
166	<	t.start();
167	<	Thread.sleep(SHORT_DELAY_MS);
168	<	t.interrupt();
169	<	t.join();
170	<	} catch (Exception e){
171	<	fail("Unexpected exception");
172	<	}
170	>	pleaseInterrupt.countDown();
171	>	try {
172	>	q.put(99);
173	>	shouldThrow();
174	>	} catch (InterruptedException success) {}
175	>	assertFalse(Thread.interrupted());
176	>	}});
177	>
178	>	await(pleaseInterrupt);
179	>	assertThreadStaysAlive(t);
180	>	t.interrupt();
181	>	awaitTermination(t);
182	>	assertEquals(0, q.remainingCapacity());
183		}
184
185	+	/**
186	+	* put blocks interruptibly waiting for take
187	+	*/
188	+	public void testPutWithTake()      { testPutWithTake(false); }
189	+	public void testPutWithTake_fair() { testPutWithTake(true); }
190	+	public void testPutWithTake(boolean fair) {
191	+	final SynchronousQueue q = new SynchronousQueue(fair);
192	+	final CountDownLatch pleaseTake = new CountDownLatch(1);
193	+	final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
194	+	Thread t = newStartedThread(new CheckedRunnable() {
195	+	public void realRun() throws InterruptedException {
196	+	pleaseTake.countDown();
197	+	q.put(one);
198
199	<	public void testTakeFromEmpty() {
200	<	final SynchronousQueue q = new SynchronousQueue();
201	<	Thread t = new Thread(new Runnable() {
202	<	public void run(){
203	<	try {
204	<	q.take();
205	<	fail("Should block");
206	<	} catch (InterruptedException success){ }
207	<	}
208	<	});
209	<	try {
210	<	t.start();
211	<	Thread.sleep(SHORT_DELAY_MS);
212	<	t.interrupt();
213	<	t.join();
214	<	} catch (Exception e){
215	<	fail("Unexpected exception");
216	<	}
217	<	}
199	>	pleaseInterrupt.countDown();
200	>	try {
201	>	q.put(99);
202	>	shouldThrow();
203	>	} catch (InterruptedException success) {}
204	>	assertFalse(Thread.interrupted());
205	>	}});
206	>
207	>	await(pleaseTake);
208	>	assertEquals(q.remainingCapacity(), 0);
209	>	try { assertSame(one, q.take()); }
210	>	catch (InterruptedException e) { threadUnexpectedException(e); }
211	>
212	>	await(pleaseInterrupt);
213	>	assertThreadStaysAlive(t);
214	>	t.interrupt();
215	>	awaitTermination(t);
216	>	assertEquals(q.remainingCapacity(), 0);
217	>	}
218	>
219	>	/**
220	>	* timed offer times out if elements not taken
221	>	*/
222	>	public void testTimedOffer()      { testTimedOffer(false); }
223	>	public void testTimedOffer_fair() { testTimedOffer(true); }
224	>	public void testTimedOffer(boolean fair) {
225	>	final SynchronousQueue q = new SynchronousQueue(fair);
226	>	final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
227	>	Thread t = newStartedThread(new CheckedRunnable() {
228	>	public void realRun() throws InterruptedException {
229	>	long startTime = System.nanoTime();
230	>	assertFalse(q.offer(new Object(), timeoutMillis(), MILLISECONDS));
231	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
232	>	pleaseInterrupt.countDown();
233	>	try {
234	>	q.offer(new Object(), 2 * LONG_DELAY_MS, MILLISECONDS);
235	>	shouldThrow();
236	>	} catch (InterruptedException success) {}
237	>	}});
238	>
239	>	await(pleaseInterrupt);
240	>	assertThreadStaysAlive(t);
241	>	t.interrupt();
242	>	awaitTermination(t);
243	>	}
244	>
245	>	/**
246	>	* poll return null if no active putter
247	>	*/
248	>	public void testPoll() {
249	>	SynchronousQueue q = new SynchronousQueue();
250	>	assertNull(q.poll());
251	>	}
252	>
253	>	/**
254	>	* timed poll with zero timeout times out if no active putter
255	>	*/
256	>	public void testTimedPoll0() throws InterruptedException {
257	>	SynchronousQueue q = new SynchronousQueue();
258	>	assertNull(q.poll(0, MILLISECONDS));
259	>	}
260	>
261	>	/**
262	>	* timed poll with nonzero timeout times out if no active putter
263	>	*/
264	>	public void testTimedPoll() throws InterruptedException {
265	>	SynchronousQueue q = new SynchronousQueue();
266	>	long startTime = System.nanoTime();
267	>	assertNull(q.poll(timeoutMillis(), MILLISECONDS));
268	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
269	>	}
270	>
271	>	/**
272	>	* timed poll before a delayed offer times out, returning null;
273	>	* after offer succeeds; on interruption throws
274	>	*/
275	>	public void testFairTimedPollWithOffer() throws InterruptedException {
276	>	final SynchronousQueue q = new SynchronousQueue(true);
277	>	final CountDownLatch pleaseOffer = new CountDownLatch(1);
278	>	Thread t = newStartedThread(new CheckedRunnable() {
279	>	public void realRun() throws InterruptedException {
280	>	long t0 = System.nanoTime();
281	>	assertNull(q.poll(SHORT_DELAY_MS, MILLISECONDS));
282	>	assertTrue(millisElapsedSince(t0) >= SHORT_DELAY_MS);
283	>
284	>	pleaseOffer.countDown();
285	>	t0 = System.nanoTime();
286	>	assertSame(zero, q.poll(LONG_DELAY_MS, MILLISECONDS));
287	>	assertTrue(millisElapsedSince(t0) < MEDIUM_DELAY_MS);
288
289	<	public void testPoll(){
290	<	SynchronousQueue q = new SynchronousQueue();
291	<	assertNull(q.poll());
292	<	}
289	>	t0 = System.nanoTime();
290	>	try {
291	>	q.poll(LONG_DELAY_MS, MILLISECONDS);
292	>	shouldThrow();
293	>	} catch (InterruptedException success) {}
294	>	assertTrue(millisElapsedSince(t0) < MEDIUM_DELAY_MS);
295	>	}});
296
297	<	public void testTimedPoll0() {
298	<	try {
299	<	SynchronousQueue q = new SynchronousQueue();
300	<	assertNull(q.poll(0, TimeUnit.MILLISECONDS));
205	<	} catch (InterruptedException e){
206	<	fail("Unexpected exception");
207	<	}
208	<	}
297	>	assertTrue(pleaseOffer.await(MEDIUM_DELAY_MS, MILLISECONDS));
298	>	long t0 = System.nanoTime();
299	>	assertTrue(q.offer(zero, LONG_DELAY_MS, MILLISECONDS));
300	>	assertTrue(millisElapsedSince(t0) < MEDIUM_DELAY_MS);
301
302	<	public void testTimedPoll() {
303	<	try {
212	<	SynchronousQueue q = new SynchronousQueue();
213	<	assertNull(q.poll(SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
214	<	} catch (InterruptedException e){
215	<	fail("Unexpected exception");
216	<	}
217	<	}
218	<
219	<	public void testInterruptedTimedPoll(){
220	<	Thread t = new Thread(new Runnable() {
221	<	public void run() {
222	<	try {
223	<	SynchronousQueue q = new SynchronousQueue();
224	<	assertNull(q.poll(SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
225	<	} catch (InterruptedException success){
226	<	}
227	<	}});
228	<	t.start();
229	<	try {
230	<	Thread.sleep(SHORT_DELAY_MS);
231	<	t.interrupt();
232	<	t.join();
233	<	}
234	<	catch (InterruptedException ie) {
235	<	fail("Unexpected exception");
236	<	}
302	>	t.interrupt();
303	>	awaitTermination(t, MEDIUM_DELAY_MS);
304		}
305
306	<	public void testTimedPollWithOffer(){
307	<	final SynchronousQueue q = new SynchronousQueue();
308	<	Thread t = new Thread(new Runnable() {
309	<	public void run(){
243	<	try {
244	<	assertNull(q.poll(SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
245	<	q.poll(LONG_DELAY_MS, TimeUnit.MILLISECONDS);
246	<	q.poll(LONG_DELAY_MS, TimeUnit.MILLISECONDS);
247	<	fail("Should block");
248	<	} catch (InterruptedException success) { }
249	<	}
250	<	});
251	<	try {
252	<	t.start();
253	<	Thread.sleep(SHORT_DELAY_MS * 2);
254	<	assertTrue(q.offer(new Integer(0), SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
255	<	t.interrupt();
256	<	t.join();
257	<	} catch (Exception e){
258	<	fail("Unexpected exception");
259	<	}
260	<	}
261	<
262	<
263	<	public void testPeek(){
306	>	/**
307	>	* peek() returns null if no active putter
308	>	*/
309	>	public void testPeek() {
310		SynchronousQueue q = new SynchronousQueue();
311	<	assertNull(q.peek());
311	>	assertNull(q.peek());
312		}
313
314	<	public void testElement(){
314	>	/**
315	>	* element() throws NSEE if no active putter
316	>	*/
317	>	public void testElement() {
318		SynchronousQueue q = new SynchronousQueue();
319		try {
320		q.element();
321	<	fail("no such element");
322	<	}
274	<	catch (NoSuchElementException success) {}
321	>	shouldThrow();
322	>	} catch (NoSuchElementException success) {}
323		}
324
325	<	public void testRemove(){
325	>	/**
326	>	* remove() throws NSEE if no active putter
327	>	*/
328	>	public void testRemove() {
329		SynchronousQueue q = new SynchronousQueue();
330		try {
331		q.remove();
332	<	fail("remove should throw");
333	<	} catch (NoSuchElementException success){
283	<	}
332	>	shouldThrow();
333	>	} catch (NoSuchElementException success) {}
334		}
335
336	<	public void testRemoveElement(){
336	>	/**
337	>	* remove(x) returns false
338	>	*/
339	>	public void testRemoveElement() {
340		SynchronousQueue q = new SynchronousQueue();
341	<	for (int i = 1; i < N; i+=2) {
342	<	assertFalse(q.remove(new Integer(i)));
290	<	}
291	<	assert(q.isEmpty());
341	>	assertFalse(q.remove(zero));
342	>	assertTrue(q.isEmpty());
343		}
344	<
345	<	public void testContains(){
346	<	SynchronousQueue q = new SynchronousQueue();
347	<	for (int i = 0; i < N; ++i) {
348	<	assertFalse(q.contains(new Integer(i)));
349	<	}
344	>
345	>	/**
346	>	* contains returns false
347	>	*/
348	>	public void testContains() {
349	>	SynchronousQueue q = new SynchronousQueue();
350	>	assertFalse(q.contains(zero));
351		}
352
353	<	public void testClear(){
353	>	/**
354	>	* clear ensures isEmpty
355	>	*/
356	>	public void testClear() {
357		SynchronousQueue q = new SynchronousQueue();
358		q.clear();
359		assertTrue(q.isEmpty());
360		}
361
362	<	public void testContainsAll(){
362	>	/**
363	>	* containsAll returns false unless empty
364	>	*/
365	>	public void testContainsAll() {
366		SynchronousQueue q = new SynchronousQueue();
367		Integer[] empty = new Integer[0];
368	<	Integer[] ints = new Integer[1]; ints[0] = new Integer(0);
369	<	//        assertTrue(q.containsAll(Arrays.asList(empty)));
368	>	assertTrue(q.containsAll(Arrays.asList(empty)));
369	>	Integer[] ints = new Integer[1]; ints[0] = zero;
370		assertFalse(q.containsAll(Arrays.asList(ints)));
371		}
372
373	<	public void testRetainAll(){
373	>	/**
374	>	* retainAll returns false
375	>	*/
376	>	public void testRetainAll() {
377		SynchronousQueue q = new SynchronousQueue();
378		Integer[] empty = new Integer[0];
379	<	Integer[] ints = new Integer[1]; ints[0] = new Integer(0);
380	<	q.retainAll(Arrays.asList(ints));
381	<	//        assertTrue(q.containsAll(Arrays.asList(empty)));
321	<	assertFalse(q.containsAll(Arrays.asList(ints)));
379	>	assertFalse(q.retainAll(Arrays.asList(empty)));
380	>	Integer[] ints = new Integer[1]; ints[0] = zero;
381	>	assertFalse(q.retainAll(Arrays.asList(ints)));
382		}
383
384	<	public void testRemoveAll(){
384	>	/**
385	>	* removeAll returns false
386	>	*/
387	>	public void testRemoveAll() {
388		SynchronousQueue q = new SynchronousQueue();
389		Integer[] empty = new Integer[0];
390	<	Integer[] ints = new Integer[1]; ints[0] = new Integer(0);
391	<	q.removeAll(Arrays.asList(ints));
329	<	//        assertTrue(q.containsAll(Arrays.asList(empty)));
390	>	assertFalse(q.removeAll(Arrays.asList(empty)));
391	>	Integer[] ints = new Integer[1]; ints[0] = zero;
392		assertFalse(q.containsAll(Arrays.asList(ints)));
393		}
394
395	<
396	<	public void testToArray(){
395	>	/**
396	>	* toArray is empty
397	>	*/
398	>	public void testToArray() {
399		SynchronousQueue q = new SynchronousQueue();
400	<	Object[] o = q.toArray();
400	>	Object[] o = q.toArray();
401		assertEquals(o.length, 0);
402		}
403
404	<	public void testToArray2(){
404	>	/**
405	>	* toArray(a) is nulled at position 0
406	>	*/
407	>	public void testToArray2() {
408		SynchronousQueue q = new SynchronousQueue();
409	<	Integer[] ints = new Integer[1];
409	>	Integer[] ints = new Integer[1];
410		assertNull(ints[0]);
411		}
412	<
413	<	public void testIterator(){
412	>
413	>	/**
414	>	* toArray(null) throws NPE
415	>	*/
416	>	public void testToArray_BadArg() {
417	>	SynchronousQueue q = new SynchronousQueue();
418	>	try {
419	>	Object o[] = q.toArray(null);
420	>	shouldThrow();
421	>	} catch (NullPointerException success) {}
422	>	}
423	>
424	>	/**
425	>	* iterator does not traverse any elements
426	>	*/
427	>	public void testIterator() {
428		SynchronousQueue q = new SynchronousQueue();
429	<	Iterator it = q.iterator();
429	>	Iterator it = q.iterator();
430		assertFalse(it.hasNext());
431		try {
432		Object x = it.next();
433	<	fail("should throw");
434	<	}
354	<	catch (NoSuchElementException success) {}
433	>	shouldThrow();
434	>	} catch (NoSuchElementException success) {}
435		}
436
437	<	public void testIteratorRemove(){
437	>	/**
438	>	* iterator remove throws ISE
439	>	*/
440	>	public void testIteratorRemove() {
441		SynchronousQueue q = new SynchronousQueue();
442	<	Iterator it = q.iterator();
442	>	Iterator it = q.iterator();
443		try {
444		it.remove();
445	<	fail("should throw");
446	<	}
364	<	catch (IllegalStateException success) {}
445	>	shouldThrow();
446	>	} catch (IllegalStateException success) {}
447		}
448
449	<	public void testToString(){
449	>	/**
450	>	* toString returns a non-null string
451	>	*/
452	>	public void testToString() {
453		SynchronousQueue q = new SynchronousQueue();
454		String s = q.toString();
455	<	assertTrue(s != null);
456	<	}
372	<
455	>	assertNotNull(s);
456	>	}
457
458	+	/**
459	+	* offer transfers elements across Executor tasks
460	+	*/
461		public void testOfferInExecutor() {
462		final SynchronousQueue q = new SynchronousQueue();
463		ExecutorService executor = Executors.newFixedThreadPool(2);
464	<	final Integer one = new Integer(1);
464	>	final CheckedBarrier threadsStarted = new CheckedBarrier(2);
465
466	<	executor.execute(new Runnable() {
467	<	public void run() {
466	>	executor.execute(new CheckedRunnable() {
467	>	public void realRun() throws InterruptedException {
468		assertFalse(q.offer(one));
469	<	try {
470	<	assertTrue(q.offer(one, MEDIUM_DELAY_MS * 2, TimeUnit.MILLISECONDS));
471	<	assertEquals(0, q.remainingCapacity());
472	<	}
473	<	catch (InterruptedException e) {
474	<	fail("should not be interrupted");
475	<	}
476	<	}
477	<	});
469	>	threadsStarted.await();
470	>	assertTrue(q.offer(one, LONG_DELAY_MS, MILLISECONDS));
471	>	assertEquals(0, q.remainingCapacity());
472	>	}});
473	>
474	>	executor.execute(new CheckedRunnable() {
475	>	public void realRun() throws InterruptedException {
476	>	threadsStarted.await();
477	>	assertSame(one, q.take());
478	>	}});
479	>
480	>	joinPool(executor);
481	>	}
482	>
483	>	/**
484	>	* timed poll retrieves elements across Executor threads
485	>	*/
486	>	public void testPollInExecutor() {
487	>	final SynchronousQueue q = new SynchronousQueue();
488	>	final CheckedBarrier threadsStarted = new CheckedBarrier(2);
489	>	ExecutorService executor = Executors.newFixedThreadPool(2);
490	>	executor.execute(new CheckedRunnable() {
491	>	public void realRun() throws InterruptedException {
492	>	assertNull(q.poll());
493	>	threadsStarted.await();
494	>	assertSame(one, q.poll(LONG_DELAY_MS, MILLISECONDS));
495	>	assertTrue(q.isEmpty());
496	>	}});
497
498	<	executor.execute(new Runnable() {
499	<	public void run() {
500	<	try {
501	<	Thread.sleep(MEDIUM_DELAY_MS);
502	<	assertEquals(one, q.take());
397	<	}
398	<	catch (InterruptedException e) {
399	<	fail("should not be interrupted");
400	<	}
401	<	}
402	<	});
403	<
404	<	executor.shutdown();
498	>	executor.execute(new CheckedRunnable() {
499	>	public void realRun() throws InterruptedException {
500	>	threadsStarted.await();
501	>	q.put(one);
502	>	}});
503
504	+	joinPool(executor);
505		}
506
507	<	public void testPollInExecutor() {
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) {}
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) {}
545	+	}
546	+
547	+	/**
548	+	* drainTo(c) of empty queue doesn't transfer elements
549	+	*/
550	+	public void testDrainTo() {
551	+	SynchronousQueue q = new SynchronousQueue();
552	+	ArrayList l = new ArrayList();
553	+	q.drainTo(l);
554	+	assertEquals(q.size(), 0);
555	+	assertEquals(l.size(), 0);
556	+	}
557	+
558	+	/**
559	+	* drainTo empties queue, unblocking a waiting put.
560	+	*/
561	+	public void testDrainToWithActivePut() throws InterruptedException {
562		final SynchronousQueue q = new SynchronousQueue();
563	+	Thread t = newStartedThread(new CheckedRunnable() {
564	+	public void realRun() throws InterruptedException {
565	+	q.put(one);
566	+	}});
567
568	<	ExecutorService executor = Executors.newFixedThreadPool(2);
568	>	ArrayList l = new ArrayList();
569	>	long startTime = System.nanoTime();
570	>	while (l.isEmpty()) {
571	>	q.drainTo(l);
572	>	if (millisElapsedSince(startTime) > LONG_DELAY_MS)
573	>	fail("timed out");
574	>	Thread.yield();
575	>	}
576	>	assertTrue(l.size() == 1);
577	>	assertSame(one, l.get(0));
578	>	awaitTermination(t);
579	>	}
580
581	<	executor.execute(new Runnable() {
582	<	public void run() {
583	<	assertNull(q.poll());
584	<	try {
585	<	assertTrue(null != q.poll(MEDIUM_DELAY_MS * 2, TimeUnit.MILLISECONDS));
586	<	assertTrue(q.isEmpty());
587	<	}
588	<	catch (InterruptedException e) {
589	<	fail("should not be interrupted");
590	<	}
424	<	}
425	<	});
581	>	/**
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	<	executor.execute(new Runnable() {
593	<	public void run() {
594	<	try {
595	<	Thread.sleep(MEDIUM_DELAY_MS);
596	<	q.put(new Integer(1));
597	<	}
598	<	catch (InterruptedException e) {
599	<	fail("should not be interrupted");
600	<	}
601	<	}
437	<	});
438	<
439	<	executor.shutdown();
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	+	/**
604	+	* drainTo(c, n) empties up to n elements of queue into c
605	+	*/
606	+	public void testDrainToN() throws InterruptedException {
607	+	final SynchronousQueue q = new SynchronousQueue();
608	+	Thread t1 = newStartedThread(new CheckedRunnable() {
609	+	public void realRun() throws InterruptedException {
610	+	q.put(one);
611	+	}});
612	+
613	+	Thread t2 = newStartedThread(new CheckedRunnable() {
614	+	public void realRun() throws InterruptedException {
615	+	q.put(two);
616	+	}});
617	+
618	+	ArrayList l = new ArrayList();
619	+	delay(SHORT_DELAY_MS);
620	+	q.drainTo(l, 1);
621	+	assertEquals(1, l.size());
622	+	q.drainTo(l, 1);
623	+	assertEquals(2, l.size());
624	+	assertTrue(l.contains(one));
625	+	assertTrue(l.contains(two));
626	+	awaitTermination(t1);
627	+	awaitTermination(t2);
628		}
629
630		}

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