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

Comparing jsr166/src/test/tck/SynchronousQueueTest.java (file contents):
Revision 1.3 by dl, Sun Sep 14 20:42:40 2003 UTC vs.
Revision 1.46 by jsr166, Sat Jan 17 22:55:06 2015 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.*;
9	<	import java.util.*;
10	<	import java.util.concurrent.*;
11	<	import java.io.*;
9	>	import static java.util.concurrent.TimeUnit.MILLISECONDS;
10
11	<	public class SynchronousQueueTest extends JSR166TestCase {
12	<
13	<	public static void main(String[] args) {
14	<	junit.textui.TestRunner.run (suite());
15	<	}
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	<	public static Test suite() {
20	<	return new TestSuite(SynchronousQueueTest.class);
21	<	}
22	>	import junit.framework.Test;
23
24	<	public void testEmptyFull() {
24	<	SynchronousQueue q = new SynchronousQueue();
25	<	assertTrue(q.isEmpty());
26	<	assertEquals(0, q.size());
27	<	assertEquals(0, q.remainingCapacity());
28	<	assertFalse(q.offer(new Integer(3)));
29	<	}
24	>	public class SynchronousQueueTest extends JSR166TestCase {
25
26	<	public void testOfferNull(){
27	<	try {
28	<	SynchronousQueue q = new SynchronousQueue();
29	<	q.offer(null);
35	<	fail("should throw NPE");
36	<	} catch (NullPointerException success) { }
26	>	public static class Fair extends BlockingQueueTest {
27	>	protected BlockingQueue emptyCollection() {
28	>	return new SynchronousQueue(true);
29	>	}
30		}
31
32	<	public void testOffer(){
33	<	SynchronousQueue q = new SynchronousQueue();
34	<	assertFalse(q.offer(new Integer(1)));
32	>	public static class NonFair extends BlockingQueueTest {
33	>	protected BlockingQueue emptyCollection() {
34	>	return new SynchronousQueue(false);
35	>	}
36		}
37
38	<	public void testAdd(){
39	<	try {
46	<	SynchronousQueue q = new SynchronousQueue();
47	<	assertEquals(0, q.remainingCapacity());
48	<	q.add(new Integer(0));
49	<	} catch (IllegalStateException success){
50	<	}
38	>	public static void main(String[] args) {
39	>	junit.textui.TestRunner.run(suite());
40		}
41
42	<	public void testAddAll1(){
43	<	try {
44	<	SynchronousQueue q = new SynchronousQueue();
45	<	q.addAll(null);
57	<	fail("Cannot add null collection");
58	<	}
59	<	catch (NullPointerException success) {}
60	<	}
61	<	public void testAddAll2(){
62	<	try {
63	<	SynchronousQueue q = new SynchronousQueue();
64	<	Integer[] ints = new Integer[1];
65	<	q.addAll(Arrays.asList(ints));
66	<	fail("Cannot add null elements");
67	<	}
68	<	catch (NullPointerException success) {}
69	<	}
70	<	public void testAddAll4(){
71	<	try {
72	<	SynchronousQueue q = new SynchronousQueue();
73	<	Integer[] ints = new Integer[1];
74	<	for (int i = 0; i < 1; ++i)
75	<	ints[i] = new Integer(i);
76	<	q.addAll(Arrays.asList(ints));
77	<	fail("Cannot add with insufficient capacity");
78	<	}
79	<	catch (IllegalStateException success) {}
42	>	public static Test suite() {
43	>	return newTestSuite(SynchronousQueueTest.class,
44	>	new Fair().testSuite(),
45	>	new NonFair().testSuite());
46		}
47
48	<	public void testPutNull() {
49	<	try {
50	<	SynchronousQueue q = new SynchronousQueue();
51	<	q.put(null);
52	<	fail("put should throw NPE");
53	<	}
54	<	catch (NullPointerException success){
55	<	}
56	<	catch (InterruptedException ie) {
57	<	fail("Unexpected exception");
58	<	}
93	<	}
94	<
95	<	public void testBlockingPut(){
96	<	Thread t = new Thread(new Runnable() {
97	<	public void run() {
98	<	try {
99	<	SynchronousQueue q = new SynchronousQueue();
100	<	q.put(new Integer(0));
101	<	threadFail("put should block");
102	<	} catch (InterruptedException ie){
103	<	}
104	<	}});
105	<	t.start();
106	<	try {
107	<	Thread.sleep(SHORT_DELAY_MS);
108	<	t.interrupt();
109	<	t.join();
110	<	}
111	<	catch (InterruptedException ie) {
112	<	fail("Unexpected exception");
113	<	}
48	>	/**
49	>	* Any SynchronousQueue is both empty and full
50	>	*/
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);
55	>	assertTrue(q.isEmpty());
56	>	assertEquals(0, q.size());
57	>	assertEquals(0, q.remainingCapacity());
58	>	assertFalse(q.offer(zero));
59		}
60
61	<	public void testPutWithTake() {
62	<	final SynchronousQueue q = new SynchronousQueue();
63	<	Thread t = new Thread(new Runnable() {
64	<	public void run(){
65	<	int added = 0;
66	<	try {
67	<	q.put(new Object());
68	<	++added;
69	<	q.put(new Object());
70	<	++added;
71	<	q.put(new Object());
72	<	++added;
73	<	q.put(new Object());
74	<	++added;
75	<	threadFail("Should block");
76	<	} catch (InterruptedException e){
77	<	assertTrue(added >= 1);
78	<	}
134	<	}
135	<	});
61	>	/**
62	>	* offer fails if no active taker
63	>	*/
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 IllegalStateException if no active taker
73	>	*/
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 {
80	<	t.start();
81	<	Thread.sleep(SHORT_DELAY_MS);
82	<	q.take();
83	<	Thread.sleep(SHORT_DELAY_MS);
84	<	t.interrupt();
85	<	t.join();
86	<	} catch (Exception e){
87	<	fail("Unexpected exception");
88	<	}
89	<	}
80	>	q.add(one);
81	>	shouldThrow();
82	>	} catch (IllegalStateException success) {}
83	>	}
84	>
85	>	/**
86	>	* addAll(this) throws IllegalArgumentException
87	>	*/
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 {
93	>	q.addAll(q);
94	>	shouldThrow();
95	>	} catch (IllegalArgumentException success) {}
96	>	}
97	>
98	>	/**
99	>	* addAll throws ISE if no active taker
100	>	*/
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	>	q.addAll(coll);
111	>	shouldThrow();
112	>	} catch (IllegalStateException success) {}
113	>	}
114	>
115	>	/**
116	>	* put blocks interruptibly if no active taker
117	>	*/
118	>	public void testBlockingPut()      { testBlockingPut(false); }
119	>	public void testBlockingPut_fair() { testBlockingPut(true); }
120	>	public void testBlockingPut(boolean fair) {
121	>	final SynchronousQueue q = new SynchronousQueue(fair);
122	>	final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
123	>	Thread t = newStartedThread(new CheckedRunnable() {
124	>	public void realRun() throws InterruptedException {
125	>	Thread.currentThread().interrupt();
126	>	try {
127	>	q.put(99);
128	>	shouldThrow();
129	>	} catch (InterruptedException success) {}
130	>	assertFalse(Thread.interrupted());
131
132	<	public void testTimedOffer() {
133	<	final SynchronousQueue q = new SynchronousQueue();
134	<	Thread t = new Thread(new Runnable() {
135	<	public void run(){
136	<	try {
137	<
138	<	threadAssertFalse(q.offer(new Object(), SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
139	<	q.offer(new Object(), LONG_DELAY_MS, TimeUnit.MILLISECONDS);
140	<	threadFail("Should block");
141	<	} catch (InterruptedException success){}
142	<	}
143	<	});
144	<
161	<	try {
162	<	t.start();
163	<	Thread.sleep(SMALL_DELAY_MS);
164	<	t.interrupt();
165	<	t.join();
166	<	} catch (Exception e){
167	<	fail("Unexpected exception");
168	<	}
132	>	pleaseInterrupt.countDown();
133	>	try {
134	>	q.put(99);
135	>	shouldThrow();
136	>	} catch (InterruptedException success) {}
137	>	assertFalse(Thread.interrupted());
138	>	}});
139	>
140	>	await(pleaseInterrupt);
141	>	assertThreadStaysAlive(t);
142	>	t.interrupt();
143	>	awaitTermination(t);
144	>	assertEquals(0, q.remainingCapacity());
145		}
146
147	+	/**
148	+	* put blocks interruptibly waiting for take
149	+	*/
150	+	public void testPutWithTake()      { testPutWithTake(false); }
151	+	public void testPutWithTake_fair() { testPutWithTake(true); }
152	+	public void testPutWithTake(boolean fair) {
153	+	final SynchronousQueue q = new SynchronousQueue(fair);
154	+	final CountDownLatch pleaseTake = new CountDownLatch(1);
155	+	final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
156	+	Thread t = newStartedThread(new CheckedRunnable() {
157	+	public void realRun() throws InterruptedException {
158	+	pleaseTake.countDown();
159	+	q.put(one);
160
161	<	public void testTakeFromEmpty() {
162	<	final SynchronousQueue q = new SynchronousQueue();
163	<	Thread t = new Thread(new Runnable() {
164	<	public void run(){
165	<	try {
166	<	q.take();
167	<	threadFail("Should block");
179	<	} catch (InterruptedException success){ }
180	<	}
181	<	});
182	<	try {
183	<	t.start();
184	<	Thread.sleep(SHORT_DELAY_MS);
185	<	t.interrupt();
186	<	t.join();
187	<	} catch (Exception e){
188	<	fail("Unexpected exception");
189	<	}
190	<	}
191	<
192	<	public void testPoll(){
193	<	SynchronousQueue q = new SynchronousQueue();
194	<	assertNull(q.poll());
195	<	}
161	>	pleaseInterrupt.countDown();
162	>	try {
163	>	q.put(99);
164	>	shouldThrow();
165	>	} catch (InterruptedException success) {}
166	>	assertFalse(Thread.interrupted());
167	>	}});
168
169	<	public void testTimedPoll0() {
170	<	try {
171	<	SynchronousQueue q = new SynchronousQueue();
172	<	assertNull(q.poll(0, TimeUnit.MILLISECONDS));
201	<	} catch (InterruptedException e){
202	<	fail("Unexpected exception");
203	<	}
204	<	}
169	>	await(pleaseTake);
170	>	assertEquals(0, q.remainingCapacity());
171	>	try { assertSame(one, q.take()); }
172	>	catch (InterruptedException e) { threadUnexpectedException(e); }
173
174	<	public void testTimedPoll() {
175	<	try {
176	<	SynchronousQueue q = new SynchronousQueue();
177	<	assertNull(q.poll(SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
178	<	} catch (InterruptedException e){
211	<	fail("Unexpected exception");
212	<	}
213	<	}
214	<
215	<	public void testInterruptedTimedPoll(){
216	<	Thread t = new Thread(new Runnable() {
217	<	public void run() {
218	<	try {
219	<	SynchronousQueue q = new SynchronousQueue();
220	<	assertNull(q.poll(SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
221	<	} catch (InterruptedException success){
222	<	}
223	<	}});
224	<	t.start();
225	<	try {
226	<	Thread.sleep(SHORT_DELAY_MS);
227	<	t.interrupt();
228	<	t.join();
229	<	}
230	<	catch (InterruptedException ie) {
231	<	fail("Unexpected exception");
232	<	}
174	>	await(pleaseInterrupt);
175	>	assertThreadStaysAlive(t);
176	>	t.interrupt();
177	>	awaitTermination(t);
178	>	assertEquals(0, q.remainingCapacity());
179		}
180
181	<	public void testTimedPollWithOffer(){
182	<	final SynchronousQueue q = new SynchronousQueue();
183	<	Thread t = new Thread(new Runnable() {
184	<	public void run(){
185	<	try {
186	<	threadAssertNull(q.poll(SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
187	<	q.poll(LONG_DELAY_MS, TimeUnit.MILLISECONDS);
188	<	q.poll(LONG_DELAY_MS, TimeUnit.MILLISECONDS);
189	<	threadFail("Should block");
190	<	} catch (InterruptedException success) { }
191	<	}
192	<	});
193	<	try {
194	<	t.start();
195	<	Thread.sleep(SMALL_DELAY_MS);
196	<	assertTrue(q.offer(new Integer(0), SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
197	<	t.interrupt();
198	<	t.join();
199	<	} catch (Exception e){
200	<	fail("Unexpected exception");
201	<	}
202	<	}
203	<
181	>	/**
182	>	* timed offer times out if elements not taken
183	>	*/
184	>	public void testTimedOffer()      { testTimedOffer(false); }
185	>	public void testTimedOffer_fair() { testTimedOffer(true); }
186	>	public void testTimedOffer(boolean fair) {
187	>	final SynchronousQueue q = new SynchronousQueue(fair);
188	>	final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
189	>	Thread t = newStartedThread(new CheckedRunnable() {
190	>	public void realRun() throws InterruptedException {
191	>	long startTime = System.nanoTime();
192	>	assertFalse(q.offer(new Object(), timeoutMillis(), MILLISECONDS));
193	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
194	>	pleaseInterrupt.countDown();
195	>	try {
196	>	q.offer(new Object(), 2 * LONG_DELAY_MS, MILLISECONDS);
197	>	shouldThrow();
198	>	} catch (InterruptedException success) {}
199	>	}});
200	>
201	>	await(pleaseInterrupt);
202	>	assertThreadStaysAlive(t);
203	>	t.interrupt();
204	>	awaitTermination(t);
205	>	}
206	>
207	>	/**
208	>	* poll return null if no active putter
209	>	*/
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()      { 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()      { 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	>	try { assertNull(q.poll(timeoutMillis(), MILLISECONDS)); }
237	>	catch (InterruptedException e) { threadUnexpectedException(e); }
238	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
239	>	}
240	>
241	>	/**
242	>	* timed poll before a delayed offer times out, returning null;
243	>	* after offer succeeds; on interruption throws
244	>	*/
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 startTime = System.nanoTime();
254	>	assertNull(q.poll(timeoutMillis(), MILLISECONDS));
255	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
256	>
257	>	pleaseOffer.countDown();
258	>	startTime = System.nanoTime();
259	>	assertSame(zero, q.poll(LONG_DELAY_MS, MILLISECONDS));
260	>	assertTrue(millisElapsedSince(startTime) < MEDIUM_DELAY_MS);
261
262	<	public void testPeek(){
263	<	SynchronousQueue q = new SynchronousQueue();
264	<	assertNull(q.peek());
265	<	}
262	>	Thread.currentThread().interrupt();
263	>	try {
264	>	q.poll(LONG_DELAY_MS, MILLISECONDS);
265	>	shouldThrow();
266	>	} catch (InterruptedException success) {}
267	>	assertFalse(Thread.interrupted());
268
269	<	public void testElement(){
270	<	SynchronousQueue q = new SynchronousQueue();
269	>	pleaseInterrupt.countDown();
270	>	try {
271	>	q.poll(LONG_DELAY_MS, MILLISECONDS);
272	>	shouldThrow();
273	>	} catch (InterruptedException success) {}
274	>	assertFalse(Thread.interrupted());
275	>	}});
276	>
277	>	await(pleaseOffer);
278	>	long startTime = System.nanoTime();
279	>	try { assertTrue(q.offer(zero, LONG_DELAY_MS, MILLISECONDS)); }
280	>	catch (InterruptedException e) { threadUnexpectedException(e); }
281	>	assertTrue(millisElapsedSince(startTime) < MEDIUM_DELAY_MS);
282	>
283	>	await(pleaseInterrupt);
284	>	assertThreadStaysAlive(t);
285	>	t.interrupt();
286	>	awaitTermination(t);
287	>	}
288	>
289	>	/**
290	>	* peek() returns null if no active putter
291	>	*/
292	>	public void testPeek()      { testPeek(false); }
293	>	public void testPeek_fair() { testPeek(true); }
294	>	public void testPeek(boolean fair) {
295	>	final SynchronousQueue q = new SynchronousQueue(fair);
296	>	assertNull(q.peek());
297	>	}
298	>
299	>	/**
300	>	* element() throws NoSuchElementException if no active putter
301	>	*/
302	>	public void testElement()      { testElement(false); }
303	>	public void testElement_fair() { testElement(true); }
304	>	public void testElement(boolean fair) {
305	>	final SynchronousQueue q = new SynchronousQueue(fair);
306		try {
307		q.element();
308	<	fail("no such element");
309	<	}
270	<	catch (NoSuchElementException success) {}
308	>	shouldThrow();
309	>	} catch (NoSuchElementException success) {}
310		}
311
312	<	public void testRemove(){
313	<	SynchronousQueue q = new SynchronousQueue();
312	>	/**
313	>	* remove() throws NoSuchElementException if no active putter
314	>	*/
315	>	public void testRemove()      { testRemove(false); }
316	>	public void testRemove_fair() { testRemove(true); }
317	>	public void testRemove(boolean fair) {
318	>	final SynchronousQueue q = new SynchronousQueue(fair);
319		try {
320		q.remove();
321	<	fail("remove should throw");
322	<	} catch (NoSuchElementException success){
279	<	}
321	>	shouldThrow();
322	>	} catch (NoSuchElementException success) {}
323		}
324
325	<	public void testRemoveElement(){
326	<	SynchronousQueue q = new SynchronousQueue();
327	<	assertFalse(q.remove(new Integer(0)));
328	<	assertTrue(q.isEmpty());
329	<	}
330	<
331	<	public void testContains(){
332	<	SynchronousQueue q = new SynchronousQueue();
333	<	assertFalse(q.contains(new Integer(0)));
334	<	}
335	<
336	<	public void testClear(){
337	<	SynchronousQueue q = new SynchronousQueue();
325	>	/**
326	>	* contains returns false
327	>	*/
328	>	public void testContains()      { testContains(false); }
329	>	public void testContains_fair() { testContains(true); }
330	>	public void testContains(boolean fair) {
331	>	final SynchronousQueue q = new SynchronousQueue(fair);
332	>	assertFalse(q.contains(zero));
333	>	}
334	>
335	>	/**
336	>	* clear ensures isEmpty
337	>	*/
338	>	public void testClear()      { testClear(false); }
339	>	public void testClear_fair() { testClear(true); }
340	>	public void testClear(boolean fair) {
341	>	final SynchronousQueue q = new SynchronousQueue(fair);
342		q.clear();
343		assertTrue(q.isEmpty());
344		}
345
346	<	public void testContainsAll(){
347	<	SynchronousQueue q = new SynchronousQueue();
346	>	/**
347	>	* containsAll returns false unless empty
348	>	*/
349	>	public void testContainsAll()      { testContainsAll(false); }
350	>	public void testContainsAll_fair() { testContainsAll(true); }
351	>	public void testContainsAll(boolean fair) {
352	>	final SynchronousQueue q = new SynchronousQueue(fair);
353		Integer[] empty = new Integer[0];
354	<	Integer[] ints = new Integer[1]; ints[0] = new Integer(0);
355	<	//        assertTrue(q.containsAll(Arrays.asList(empty)));
354	>	assertTrue(q.containsAll(Arrays.asList(empty)));
355	>	Integer[] ints = new Integer[1]; ints[0] = zero;
356		assertFalse(q.containsAll(Arrays.asList(ints)));
357		}
358
359	<	public void testRetainAll(){
360	<	SynchronousQueue q = new SynchronousQueue();
359	>	/**
360	>	* retainAll returns false
361	>	*/
362	>	public void testRetainAll()      { testRetainAll(false); }
363	>	public void testRetainAll_fair() { testRetainAll(true); }
364	>	public void testRetainAll(boolean fair) {
365	>	final SynchronousQueue q = new SynchronousQueue(fair);
366		Integer[] empty = new Integer[0];
367	<	Integer[] ints = new Integer[1]; ints[0] = new Integer(0);
368	<	q.retainAll(Arrays.asList(ints));
369	<	//        assertTrue(q.containsAll(Arrays.asList(empty)));
313	<	assertFalse(q.containsAll(Arrays.asList(ints)));
367	>	assertFalse(q.retainAll(Arrays.asList(empty)));
368	>	Integer[] ints = new Integer[1]; ints[0] = zero;
369	>	assertFalse(q.retainAll(Arrays.asList(ints)));
370		}
371
372	<	public void testRemoveAll(){
373	<	SynchronousQueue q = new SynchronousQueue();
372	>	/**
373	>	* removeAll returns false
374	>	*/
375	>	public void testRemoveAll()      { testRemoveAll(false); }
376	>	public void testRemoveAll_fair() { testRemoveAll(true); }
377	>	public void testRemoveAll(boolean fair) {
378	>	final SynchronousQueue q = new SynchronousQueue(fair);
379		Integer[] empty = new Integer[0];
380	<	Integer[] ints = new Integer[1]; ints[0] = new Integer(0);
381	<	q.removeAll(Arrays.asList(ints));
321	<	//        assertTrue(q.containsAll(Arrays.asList(empty)));
380	>	assertFalse(q.removeAll(Arrays.asList(empty)));
381	>	Integer[] ints = new Integer[1]; ints[0] = zero;
382		assertFalse(q.containsAll(Arrays.asList(ints)));
383		}
384
385	<
386	<	public void testToArray(){
387	<	SynchronousQueue q = new SynchronousQueue();
388	<	Object[] o = q.toArray();
389	<	assertEquals(o.length, 0);
390	<	}
391	<
392	<	public void testToArray2(){
393	<	SynchronousQueue q = new SynchronousQueue();
394	<	Integer[] ints = new Integer[1];
395	<	assertNull(ints[0]);
396	<	}
397	<
398	<	public void testIterator(){
399	<	SynchronousQueue q = new SynchronousQueue();
400	<	Iterator it = q.iterator();
401	<	assertFalse(it.hasNext());
402	<	try {
403	<	Object x = it.next();
404	<	fail("should throw");
405	<	}
406	<	catch (NoSuchElementException success) {}
407	<	}
408	<
409	<	public void testIteratorRemove(){
410	<	SynchronousQueue q = new SynchronousQueue();
411	<	Iterator it = q.iterator();
385	>	/**
386	>	* toArray is empty
387	>	*/
388	>	public void testToArray()      { testToArray(false); }
389	>	public void testToArray_fair() { testToArray(true); }
390	>	public void testToArray(boolean fair) {
391	>	final SynchronousQueue q = new SynchronousQueue(fair);
392	>	Object[] o = q.toArray();
393	>	assertEquals(0, o.length);
394	>	}
395	>
396	>	/**
397	>	* toArray(Integer array) returns its argument with the first
398	>	* element (if present) nulled out
399	>	*/
400	>	public void testToArray2()      { testToArray2(false); }
401	>	public void testToArray2_fair() { testToArray2(true); }
402	>	public void testToArray2(boolean fair) {
403	>	final SynchronousQueue<Integer> q
404	>	= new SynchronousQueue<Integer>(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_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);
427	>	shouldThrow();
428	>	} catch (NullPointerException success) {}
429	>	}
430	>
431	>	/**
432	>	* iterator does not traverse any elements
433	>	*/
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()      { 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();
450	<	fail("should throw");
451	<	}
356	<	catch (IllegalStateException success) {}
450	>	shouldThrow();
451	>	} catch (IllegalStateException success) {}
452		}
453
454	<	public void testToString(){
455	<	SynchronousQueue q = new SynchronousQueue();
454	>	/**
455	>	* toString returns a non-null string
456	>	*/
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	<	assertTrue(s != null);
463	<	}
364	<
462	>	assertNotNull(s);
463	>	}
464
465	<	public void testOfferInExecutor() {
466	<	final SynchronousQueue q = new SynchronousQueue();
465	>	/**
466	>	* offer transfers elements across Executor tasks
467	>	*/
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		ExecutorService executor = Executors.newFixedThreadPool(2);
473	<	final Integer one = new Integer(1);
473	>	final CheckedBarrier threadsStarted = new CheckedBarrier(2);
474
475	<	executor.execute(new Runnable() {
476	<	public void run() {
477	<	threadAssertFalse(q.offer(one));
478	<	try {
479	<	threadAssertTrue(q.offer(one, MEDIUM_DELAY_MS, TimeUnit.MILLISECONDS));
480	<	threadAssertEquals(0, q.remainingCapacity());
481	<	}
482	<	catch (InterruptedException e) {
483	<	threadFail("should not be interrupted");
484	<	}
485	<	}
486	<	});
475	>	executor.execute(new CheckedRunnable() {
476	>	public void realRun() throws InterruptedException {
477	>	assertFalse(q.offer(one));
478	>	threadsStarted.await();
479	>	assertTrue(q.offer(one, LONG_DELAY_MS, MILLISECONDS));
480	>	assertEquals(0, q.remainingCapacity());
481	>	}});
482	>
483	>	executor.execute(new CheckedRunnable() {
484	>	public void realRun() throws InterruptedException {
485	>	threadsStarted.await();
486	>	assertSame(one, q.take());
487	>	}});
488
384	–	executor.execute(new Runnable() {
385	–	public void run() {
386	–	try {
387	–	Thread.sleep(SMALL_DELAY_MS);
388	–	threadAssertEquals(one, q.take());
389	–	}
390	–	catch (InterruptedException e) {
391	–	fail("should not be interrupted");
392	–	}
393	–	}
394	–	});
395	–
489		joinPool(executor);
397	–
490		}
491
492	<	public void testPollInExecutor() {
493	<
494	<	final SynchronousQueue q = new SynchronousQueue();
495	<
492	>	/**
493	>	* timed poll retrieves elements across Executor threads
494	>	*/
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
406	–	executor.execute(new Runnable() {
407	–	public void run() {
408	–	threadAssertNull(q.poll());
409	–	try {
410	–	threadAssertTrue(null != q.poll(MEDIUM_DELAY_MS, TimeUnit.MILLISECONDS));
411	–	threadAssertTrue(q.isEmpty());
412	–	}
413	–	catch (InterruptedException e) {
414	–	threadFail("should not be interrupted");
415	–	}
416	–	}
417	–	});
418	–
419	–	executor.execute(new Runnable() {
420	–	public void run() {
421	–	try {
422	–	Thread.sleep(SMALL_DELAY_MS);
423	–	q.put(new Integer(1));
424	–	}
425	–	catch (InterruptedException e) {
426	–	threadFail("should not be interrupted");
427	–	}
428	–	}
429	–	});
430	–
515		joinPool(executor);
432	–
516		}
517
518	+	/**
519	+	* a deserialized serialized queue is usable
520	+	*/
521		public void testSerialization() {
522	<	SynchronousQueue q = new SynchronousQueue();
523	<	try {
524	<	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
525	<	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
526	<	out.writeObject(q);
527	<	out.close();
528	<
529	<	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
530	<	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
531	<	SynchronousQueue r = (SynchronousQueue)in.readObject();
532	<	assertEquals(q.size(), r.size());
533	<	while (!q.isEmpty())
534	<	assertEquals(q.remove(), r.remove());
535	<	} catch(Exception e){
450	<	fail("unexpected exception");
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()      { 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(0, q.size());
549	+	assertEquals(0, l.size());
550	+	}
551	+
552	+	/**
553	+	* drainTo empties queue, unblocking a waiting put.
554	+	*/
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);
562	+	}});
563	+
564	+	ArrayList l = new ArrayList();
565	+	long startTime = System.nanoTime();
566	+	while (l.isEmpty()) {
567	+	q.drainTo(l);
568	+	if (millisElapsedSince(startTime) > LONG_DELAY_MS)
569	+	fail("timed out");
570	+	Thread.yield();
571	+	}
572	+	assertTrue(l.size() == 1);
573	+	assertSame(one, l.get(0));
574	+	awaitTermination(t);
575	+	}
576	+
577	+	/**
578	+	* drainTo(c, n) empties up to n elements of queue into c
579	+	*/
580	+	public void testDrainToN() throws InterruptedException {
581	+	final SynchronousQueue q = new SynchronousQueue();
582	+	Thread t1 = newStartedThread(new CheckedRunnable() {
583	+	public void realRun() throws InterruptedException {
584	+	q.put(one);
585	+	}});
586	+
587	+	Thread t2 = newStartedThread(new CheckedRunnable() {
588	+	public void realRun() throws InterruptedException {
589	+	q.put(two);
590	+	}});
591	+
592	+	ArrayList l = new ArrayList();
593	+	delay(SHORT_DELAY_MS);
594	+	q.drainTo(l, 1);
595	+	assertEquals(1, l.size());
596	+	q.drainTo(l, 1);
597	+	assertEquals(2, l.size());
598	+	assertTrue(l.contains(one));
599	+	assertTrue(l.contains(two));
600	+	awaitTermination(t1);
601	+	awaitTermination(t2);
602	+	}
603	+
604	+	/**
605	+	* remove(null), contains(null) always return false
606	+	*/
607	+	public void testNeverContainsNull() {
608	+	Collection<?> q = new SynchronousQueue();
609	+	assertFalse(q.contains(null));
610	+	assertFalse(q.remove(null));
611	+	}
612	+
613		}

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