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

Comparing jsr166/src/test/tck/SynchronousQueueTest.java (file contents):
Revision 1.2 by dl, Sun Sep 7 20:39:11 2003 UTC vs.
Revision 1.65 by jsr166, Tue Aug 13 23:06:39 2019 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.*;
12	<
13	<	public class SynchronousQueueTest extends TestCase {
14	<
15	<	private final static int N = 1;
16	<	private static long SHORT_DELAY_MS = 100;
17	<	private static long MEDIUM_DELAY_MS = 1000;
18	<	private static long LONG_DELAY_MS = 10000;
9	>	import static java.util.concurrent.TimeUnit.MILLISECONDS;
10
11	<	public static void main(String[] args) {
12	<	junit.textui.TestRunner.run (suite());
13	<	}
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() {
25	<	return new TestSuite(SynchronousQueueTest.class);
26	<	}
22	>	import junit.framework.Test;
23
24	<	public void testEmptyFull() {
29	<	SynchronousQueue q = new SynchronousQueue();
30	<	assertTrue(q.isEmpty());
31	<	assertEquals(0, q.size());
32	<	assertEquals(0, q.remainingCapacity());
33	<	assertFalse(q.offer(new Integer(3)));
34	<	}
24	>	public class SynchronousQueueTest extends JSR166TestCase {
25
26	<	public void testOfferNull(){
27	<	try {
28	<	SynchronousQueue q = new SynchronousQueue();
29	<	q.offer(null);
40	<	fail("should throw NPE");
41	<	} 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 {
51	<	SynchronousQueue q = new SynchronousQueue();
52	<	assertEquals(0, q.remainingCapacity());
53	<	q.add(new Integer(0));
54	<	} catch (IllegalStateException success){
55	<	}
38	>	public static void main(String[] args) {
39	>	main(suite(), args);
40		}
41
42	<	public void testAddAll1(){
43	<	try {
44	<	SynchronousQueue q = new SynchronousQueue();
45	<	q.addAll(null);
62	<	fail("Cannot add null collection");
63	<	}
64	<	catch (NullPointerException success) {}
65	<	}
66	<	public void testAddAll2(){
67	<	try {
68	<	SynchronousQueue q = new SynchronousQueue();
69	<	Integer[] ints = new Integer[N];
70	<	q.addAll(Arrays.asList(ints));
71	<	fail("Cannot add null elements");
72	<	}
73	<	catch (NullPointerException success) {}
74	<	}
75	<	public void testAddAll4(){
76	<	try {
77	<	SynchronousQueue q = new SynchronousQueue();
78	<	Integer[] ints = new Integer[N];
79	<	for (int i = 0; i < N; ++i)
80	<	ints[i] = new Integer(i);
81	<	q.addAll(Arrays.asList(ints));
82	<	fail("Cannot add with insufficient capacity");
83	<	}
84	<	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	<	}
98	<	}
99	<
100	<	public void testBlockingPut(){
101	<	Thread t = new Thread(new Runnable() {
102	<	public void run() {
103	<	try {
104	<	SynchronousQueue q = new SynchronousQueue();
105	<	q.put(new Integer(0));
106	<	fail("put should block");
107	<	} catch (InterruptedException ie){
108	<	}
109	<	}});
110	<	t.start();
111	<	try {
112	<	Thread.sleep(SHORT_DELAY_MS);
113	<	t.interrupt();
114	<	t.join();
115	<	}
116	<	catch (InterruptedException ie) {
117	<	fail("Unexpected exception");
118	<	}
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	<	fail("Should block");
76	<	} catch (InterruptedException e){
77	<	assertTrue(added >= 1);
78	<	}
139	<	}
140	<	});
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 IllegalStateException 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	<	assertFalse(q.offer(new Object(), SHORT_DELAY_MS/2, TimeUnit.MILLISECONDS));
139	<	q.offer(new Object(), LONG_DELAY_MS, TimeUnit.MILLISECONDS);
140	<	fail("Should block");
141	<	} catch (InterruptedException success){}
142	<	}
143	<	});
144	<
166	<	try {
167	<	t.start();
168	<	Thread.sleep(SHORT_DELAY_MS);
169	<	t.interrupt();
170	<	t.join();
171	<	} catch (Exception e){
172	<	fail("Unexpected exception");
173	<	}
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	>	if (randomBoolean()) assertThreadBlocks(t, Thread.State.WAITING);
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();
183	<	fail("Should block");
184	<	} catch (InterruptedException success){ }
185	<	}
186	<	});
187	<	try {
188	<	t.start();
189	<	Thread.sleep(SHORT_DELAY_MS);
190	<	t.interrupt();
191	<	t.join();
192	<	} catch (Exception e){
193	<	fail("Unexpected exception");
194	<	}
195	<	}
161	>	Thread.currentThread().interrupt();
162	>	try {
163	>	q.put(99);
164	>	shouldThrow();
165	>	} catch (InterruptedException success) {}
166	>	assertFalse(Thread.interrupted());
167
168	<	public void testPoll(){
169	<	SynchronousQueue q = new SynchronousQueue();
170	<	assertNull(q.poll());
171	<	}
168	>	pleaseInterrupt.countDown();
169	>	try {
170	>	q.put(99);
171	>	shouldThrow();
172	>	} catch (InterruptedException success) {}
173	>	assertFalse(Thread.interrupted());
174	>	}});
175
176	<	public void testTimedPoll0() {
177	<	try {
178	<	SynchronousQueue q = new SynchronousQueue();
179	<	assertNull(q.poll(0, TimeUnit.MILLISECONDS));
206	<	} catch (InterruptedException e){
207	<	fail("Unexpected exception");
208	<	}
209	<	}
176	>	await(pleaseTake);
177	>	assertEquals(0, q.remainingCapacity());
178	>	try { assertSame(one, q.take()); }
179	>	catch (InterruptedException e) { threadUnexpectedException(e); }
180
181	<	public void testTimedPoll() {
182	<	try {
183	<	SynchronousQueue q = new SynchronousQueue();
184	<	assertNull(q.poll(SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
185	<	} catch (InterruptedException e){
216	<	fail("Unexpected exception");
217	<	}
181	>	await(pleaseInterrupt);
182	>	if (randomBoolean()) assertThreadBlocks(t, Thread.State.WAITING);
183	>	t.interrupt();
184	>	awaitTermination(t);
185	>	assertEquals(0, q.remainingCapacity());
186		}
187
188	<	public void testInterruptedTimedPoll(){
189	<	Thread t = new Thread(new Runnable() {
190	<	public void run() {
191	<	try {
192	<	SynchronousQueue q = new SynchronousQueue();
193	<	assertNull(q.poll(SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
194	<	} catch (InterruptedException success){
195	<	}
196	<	}});
197	<	t.start();
230	<	try {
231	<	Thread.sleep(SHORT_DELAY_MS);
232	<	t.interrupt();
233	<	t.join();
234	<	}
235	<	catch (InterruptedException ie) {
236	<	fail("Unexpected exception");
237	<	}
238	<	}
188	>	/**
189	>	* timed offer times out if elements not taken
190	>	*/
191	>	public void testTimedOffer() {
192	>	final boolean fair = randomBoolean();
193	>	final SynchronousQueue q = new SynchronousQueue(fair);
194	>	final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
195	>	Thread t = newStartedThread(new CheckedRunnable() {
196	>	public void realRun() throws InterruptedException {
197	>	long startTime = System.nanoTime();
198
199	<	public void testTimedPollWithOffer(){
200	<	final SynchronousQueue q = new SynchronousQueue();
242	<	Thread t = new Thread(new Runnable() {
243	<	public void run(){
244	<	try {
245	<	assertNull(q.poll(SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
246	<	q.poll(LONG_DELAY_MS, TimeUnit.MILLISECONDS);
247	<	q.poll(LONG_DELAY_MS, TimeUnit.MILLISECONDS);
248	<	fail("Should block");
249	<	} catch (InterruptedException success) { }
250	<	}
251	<	});
252	<	try {
253	<	t.start();
254	<	Thread.sleep(SHORT_DELAY_MS * 2);
255	<	assertTrue(q.offer(new Integer(0), SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
256	<	t.interrupt();
257	<	t.join();
258	<	} catch (Exception e){
259	<	fail("Unexpected exception");
260	<	}
261	<	}
199	>	assertFalse(q.offer(new Object(), timeoutMillis(), MILLISECONDS));
200	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
201
202	+	Thread.currentThread().interrupt();
203	+	try {
204	+	q.offer(new Object(), randomTimeout(), randomTimeUnit());
205	+	shouldThrow();
206	+	} catch (InterruptedException success) {}
207	+	assertFalse(Thread.interrupted());
208
209	<	public void testPeek(){
210	<	SynchronousQueue q = new SynchronousQueue();
211	<	assertNull(q.peek());
212	<	}
209	>	pleaseInterrupt.countDown();
210	>	try {
211	>	q.offer(new Object(), LONG_DELAY_MS, MILLISECONDS);
212	>	shouldThrow();
213	>	} catch (InterruptedException success) {}
214	>	assertFalse(Thread.interrupted());
215	>
216	>	assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS);
217	>	}});
218	>
219	>	await(pleaseInterrupt);
220	>	if (randomBoolean()) assertThreadBlocks(t, Thread.State.TIMED_WAITING);
221	>	t.interrupt();
222	>	awaitTermination(t);
223	>	}
224	>
225	>	/**
226	>	* poll return null if no active putter
227	>	*/
228	>	public void testPoll()      { testPoll(false); }
229	>	public void testPoll_fair() { testPoll(true); }
230	>	public void testPoll(boolean fair) {
231	>	final SynchronousQueue q = new SynchronousQueue(fair);
232	>	assertNull(q.poll());
233	>	}
234	>
235	>	/**
236	>	* timed poll with zero timeout times out if no active putter
237	>	*/
238	>	public void testTimedPoll0()      { testTimedPoll0(false); }
239	>	public void testTimedPoll0_fair() { testTimedPoll0(true); }
240	>	public void testTimedPoll0(boolean fair) {
241	>	final SynchronousQueue q = new SynchronousQueue(fair);
242	>	try { assertNull(q.poll(0, MILLISECONDS)); }
243	>	catch (InterruptedException e) { threadUnexpectedException(e); }
244	>	}
245	>
246	>	/**
247	>	* timed poll with nonzero timeout times out if no active putter
248	>	*/
249	>	public void testTimedPoll() {
250	>	final boolean fair = randomBoolean();
251	>	final SynchronousQueue q = new SynchronousQueue(fair);
252	>	final long startTime = System.nanoTime();
253	>	try { assertNull(q.poll(timeoutMillis(), MILLISECONDS)); }
254	>	catch (InterruptedException e) { threadUnexpectedException(e); }
255	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
256	>	}
257	>
258	>	/**
259	>	* timed poll before a delayed offer times out, returning null;
260	>	* after offer succeeds; on interruption throws
261	>	*/
262	>	public void testTimedPollWithOffer() {
263	>	final boolean fair = randomBoolean();
264	>	final SynchronousQueue q = new SynchronousQueue(fair);
265	>	final CountDownLatch pleaseOffer = new CountDownLatch(1);
266	>	final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
267	>	Thread t = newStartedThread(new CheckedRunnable() {
268	>	public void realRun() throws InterruptedException {
269	>	long startTime = System.nanoTime();
270	>	assertNull(q.poll(timeoutMillis(), MILLISECONDS));
271	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
272	>
273	>	pleaseOffer.countDown();
274	>	startTime = System.nanoTime();
275	>	assertSame(zero, q.poll(LONG_DELAY_MS, MILLISECONDS));
276
277	<	public void testElement(){
278	<	SynchronousQueue q = new SynchronousQueue();
277	>	Thread.currentThread().interrupt();
278	>	try {
279	>	q.poll(randomTimeout(), randomTimeUnit());
280	>	shouldThrow();
281	>	} catch (InterruptedException success) {}
282	>	assertFalse(Thread.interrupted());
283	>
284	>	pleaseInterrupt.countDown();
285	>	try {
286	>	q.poll(LONG_DELAY_MS, MILLISECONDS);
287	>	shouldThrow();
288	>	} catch (InterruptedException success) {}
289	>	assertFalse(Thread.interrupted());
290	>
291	>	assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS);
292	>	}});
293	>
294	>	await(pleaseOffer);
295	>	long startTime = System.nanoTime();
296	>	try { assertTrue(q.offer(zero, LONG_DELAY_MS, MILLISECONDS)); }
297	>	catch (InterruptedException e) { threadUnexpectedException(e); }
298	>	assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS);
299	>
300	>	await(pleaseInterrupt);
301	>	if (randomBoolean()) assertThreadBlocks(t, Thread.State.TIMED_WAITING);
302	>	t.interrupt();
303	>	awaitTermination(t);
304	>	}
305	>
306	>	/**
307	>	* peek() returns null if no active putter
308	>	*/
309	>	public void testPeek()      { testPeek(false); }
310	>	public void testPeek_fair() { testPeek(true); }
311	>	public void testPeek(boolean fair) {
312	>	final SynchronousQueue q = new SynchronousQueue(fair);
313	>	assertNull(q.peek());
314	>	}
315	>
316	>	/**
317	>	* element() throws NoSuchElementException if no active putter
318	>	*/
319	>	public void testElement()      { testElement(false); }
320	>	public void testElement_fair() { testElement(true); }
321	>	public void testElement(boolean fair) {
322	>	final SynchronousQueue q = new SynchronousQueue(fair);
323		try {
324		q.element();
325	<	fail("no such element");
326	<	}
275	<	catch (NoSuchElementException success) {}
325	>	shouldThrow();
326	>	} catch (NoSuchElementException success) {}
327		}
328
329	<	public void testRemove(){
330	<	SynchronousQueue q = new SynchronousQueue();
329	>	/**
330	>	* remove() throws NoSuchElementException if no active putter
331	>	*/
332	>	public void testRemove()      { testRemove(false); }
333	>	public void testRemove_fair() { testRemove(true); }
334	>	public void testRemove(boolean fair) {
335	>	final SynchronousQueue q = new SynchronousQueue(fair);
336		try {
337		q.remove();
338	<	fail("remove should throw");
339	<	} catch (NoSuchElementException success){
284	<	}
285	<	}
286	<
287	<	public void testRemoveElement(){
288	<	SynchronousQueue q = new SynchronousQueue();
289	<	for (int i = 1; i < N; i+=2) {
290	<	assertFalse(q.remove(new Integer(i)));
291	<	}
292	<	assertTrue(q.isEmpty());
293	<	}
294	<
295	<	public void testContains(){
296	<	SynchronousQueue q = new SynchronousQueue();
297	<	for (int i = 0; i < N; ++i) {
298	<	assertFalse(q.contains(new Integer(i)));
299	<	}
338	>	shouldThrow();
339	>	} catch (NoSuchElementException success) {}
340		}
341
342	<	public void testClear(){
343	<	SynchronousQueue q = new SynchronousQueue();
342	>	/**
343	>	* contains returns false
344	>	*/
345	>	public void testContains()      { testContains(false); }
346	>	public void testContains_fair() { testContains(true); }
347	>	public void testContains(boolean fair) {
348	>	final SynchronousQueue q = new SynchronousQueue(fair);
349	>	assertFalse(q.contains(zero));
350	>	}
351	>
352	>	/**
353	>	* clear ensures isEmpty
354	>	*/
355	>	public void testClear()      { testClear(false); }
356	>	public void testClear_fair() { testClear(true); }
357	>	public void testClear(boolean fair) {
358	>	final SynchronousQueue q = new SynchronousQueue(fair);
359		q.clear();
360		assertTrue(q.isEmpty());
361		}
362
363	<	public void testContainsAll(){
364	<	SynchronousQueue q = new SynchronousQueue();
363	>	/**
364	>	* containsAll returns false unless empty
365	>	*/
366	>	public void testContainsAll()      { testContainsAll(false); }
367	>	public void testContainsAll_fair() { testContainsAll(true); }
368	>	public void testContainsAll(boolean fair) {
369	>	final SynchronousQueue q = new SynchronousQueue(fair);
370		Integer[] empty = new Integer[0];
371	<	Integer[] ints = new Integer[1]; ints[0] = new Integer(0);
372	<	//        assertTrue(q.containsAll(Arrays.asList(empty)));
371	>	assertTrue(q.containsAll(Arrays.asList(empty)));
372	>	Integer[] ints = new Integer[1]; ints[0] = zero;
373		assertFalse(q.containsAll(Arrays.asList(ints)));
374		}
375
376	<	public void testRetainAll(){
377	<	SynchronousQueue q = new SynchronousQueue();
376	>	/**
377	>	* retainAll returns false
378	>	*/
379	>	public void testRetainAll()      { testRetainAll(false); }
380	>	public void testRetainAll_fair() { testRetainAll(true); }
381	>	public void testRetainAll(boolean fair) {
382	>	final SynchronousQueue q = new SynchronousQueue(fair);
383		Integer[] empty = new Integer[0];
384	<	Integer[] ints = new Integer[1]; ints[0] = new Integer(0);
385	<	q.retainAll(Arrays.asList(ints));
386	<	//        assertTrue(q.containsAll(Arrays.asList(empty)));
322	<	assertFalse(q.containsAll(Arrays.asList(ints)));
384	>	assertFalse(q.retainAll(Arrays.asList(empty)));
385	>	Integer[] ints = new Integer[1]; ints[0] = zero;
386	>	assertFalse(q.retainAll(Arrays.asList(ints)));
387		}
388
389	<	public void testRemoveAll(){
390	<	SynchronousQueue q = new SynchronousQueue();
389	>	/**
390	>	* removeAll returns false
391	>	*/
392	>	public void testRemoveAll()      { testRemoveAll(false); }
393	>	public void testRemoveAll_fair() { testRemoveAll(true); }
394	>	public void testRemoveAll(boolean fair) {
395	>	final SynchronousQueue q = new SynchronousQueue(fair);
396		Integer[] empty = new Integer[0];
397	<	Integer[] ints = new Integer[1]; ints[0] = new Integer(0);
398	<	q.removeAll(Arrays.asList(ints));
330	<	//        assertTrue(q.containsAll(Arrays.asList(empty)));
397	>	assertFalse(q.removeAll(Arrays.asList(empty)));
398	>	Integer[] ints = new Integer[1]; ints[0] = zero;
399		assertFalse(q.containsAll(Arrays.asList(ints)));
400		}
401
402	<
403	<	public void testToArray(){
404	<	SynchronousQueue q = new SynchronousQueue();
405	<	Object[] o = q.toArray();
406	<	assertEquals(o.length, 0);
407	<	}
408	<
409	<	public void testToArray2(){
410	<	SynchronousQueue q = new SynchronousQueue();
411	<	Integer[] ints = new Integer[1];
412	<	assertNull(ints[0]);
413	<	}
414	<
415	<	public void testIterator(){
416	<	SynchronousQueue q = new SynchronousQueue();
417	<	Iterator it = q.iterator();
418	<	assertFalse(it.hasNext());
419	<	try {
420	<	Object x = it.next();
421	<	fail("should throw");
422	<	}
423	<	catch (NoSuchElementException success) {}
424	<	}
425	<
426	<	public void testIteratorRemove(){
427	<	SynchronousQueue q = new SynchronousQueue();
428	<	Iterator it = q.iterator();
402	>	/**
403	>	* toArray is empty
404	>	*/
405	>	public void testToArray()      { testToArray(false); }
406	>	public void testToArray_fair() { testToArray(true); }
407	>	public void testToArray(boolean fair) {
408	>	final SynchronousQueue q = new SynchronousQueue(fair);
409	>	Object[] o = q.toArray();
410	>	assertEquals(0, o.length);
411	>	}
412	>
413	>	/**
414	>	* toArray(Integer array) returns its argument with the first
415	>	* element (if present) nulled out
416	>	*/
417	>	public void testToArray2()      { testToArray2(false); }
418	>	public void testToArray2_fair() { testToArray2(true); }
419	>	public void testToArray2(boolean fair) {
420	>	final SynchronousQueue<Integer> q = new SynchronousQueue<>(fair);
421	>	Integer[] a;
422	>
423	>	a = new Integer[0];
424	>	assertSame(a, q.toArray(a));
425	>
426	>	a = new Integer[3];
427	>	Arrays.fill(a, 42);
428	>	assertSame(a, q.toArray(a));
429	>	assertNull(a[0]);
430	>	for (int i = 1; i < a.length; i++)
431	>	assertEquals(42, (int) a[i]);
432	>	}
433	>
434	>	/**
435	>	* toArray(null) throws NPE
436	>	*/
437	>	public void testToArray_null()      { testToArray_null(false); }
438	>	public void testToArray_null_fair() { testToArray_null(true); }
439	>	public void testToArray_null(boolean fair) {
440	>	final SynchronousQueue q = new SynchronousQueue(fair);
441	>	try {
442	>	Object[] o = q.toArray((Object[])null);
443	>	shouldThrow();
444	>	} catch (NullPointerException success) {}
445	>	}
446	>
447	>	/**
448	>	* iterator does not traverse any elements
449	>	*/
450	>	public void testIterator()      { testIterator(false); }
451	>	public void testIterator_fair() { testIterator(true); }
452	>	public void testIterator(boolean fair) {
453	>	assertIteratorExhausted(new SynchronousQueue(fair).iterator());
454	>	}
455	>
456	>	/**
457	>	* iterator remove throws IllegalStateException
458	>	*/
459	>	public void testIteratorRemove()      { testIteratorRemove(false); }
460	>	public void testIteratorRemove_fair() { testIteratorRemove(true); }
461	>	public void testIteratorRemove(boolean fair) {
462	>	final SynchronousQueue q = new SynchronousQueue(fair);
463	>	Iterator it = q.iterator();
464		try {
465		it.remove();
466	<	fail("should throw");
467	<	}
365	<	catch (IllegalStateException success) {}
466	>	shouldThrow();
467	>	} catch (IllegalStateException success) {}
468		}
469
470	<	public void testToString(){
471	<	SynchronousQueue q = new SynchronousQueue();
470	>	/**
471	>	* toString returns a non-null string
472	>	*/
473	>	public void testToString()      { testToString(false); }
474	>	public void testToString_fair() { testToString(true); }
475	>	public void testToString(boolean fair) {
476	>	final SynchronousQueue q = new SynchronousQueue(fair);
477		String s = q.toString();
478	<	assertTrue(s != null);
479	<	}
373	<
374	<
375	<	public void testOfferInExecutor() {
376	<	final SynchronousQueue q = new SynchronousQueue();
377	<	ExecutorService executor = Executors.newFixedThreadPool(2);
378	<	final Integer one = new Integer(1);
478	>	assertNotNull(s);
479	>	}
480
481	<	executor.execute(new Runnable() {
482	<	public void run() {
483	<	assertFalse(q.offer(one));
484	<	try {
485	<	assertTrue(q.offer(one, MEDIUM_DELAY_MS * 2, TimeUnit.MILLISECONDS));
481	>	/**
482	>	* offer transfers elements across Executor tasks
483	>	*/
484	>	public void testOfferInExecutor()      { testOfferInExecutor(false); }
485	>	public void testOfferInExecutor_fair() { testOfferInExecutor(true); }
486	>	public void testOfferInExecutor(boolean fair) {
487	>	final SynchronousQueue q = new SynchronousQueue(fair);
488	>	final CheckedBarrier threadsStarted = new CheckedBarrier(2);
489	>	final ExecutorService executor = Executors.newFixedThreadPool(2);
490	>	try (PoolCleaner cleaner = cleaner(executor)) {
491	>
492	>	executor.execute(new CheckedRunnable() {
493	>	public void realRun() throws InterruptedException {
494	>	assertFalse(q.offer(one));
495	>	threadsStarted.await();
496	>	assertTrue(q.offer(one, LONG_DELAY_MS, MILLISECONDS));
497		assertEquals(0, q.remainingCapacity());
498	<	}
387	<	catch (InterruptedException e) {
388	<	fail("should not be interrupted");
389	<	}
390	<	}
391	<	});
392	<
393	<	executor.execute(new Runnable() {
394	<	public void run() {
395	<	try {
396	<	Thread.sleep(MEDIUM_DELAY_MS);
397	<	assertEquals(one, q.take());
398	<	}
399	<	catch (InterruptedException e) {
400	<	fail("should not be interrupted");
401	<	}
402	<	}
403	<	});
404	<
405	<	executor.shutdown();
498	>	}});
499
500	+	executor.execute(new CheckedRunnable() {
501	+	public void realRun() throws InterruptedException {
502	+	threadsStarted.await();
503	+	assertSame(one, q.take());
504	+	}});
505	+	}
506		}
507
508	<	public void testPollInExecutor() {
509	<
510	<	final SynchronousQueue q = new SynchronousQueue();
511	<
512	<	ExecutorService executor = Executors.newFixedThreadPool(2);
513	<
514	<	executor.execute(new Runnable() {
515	<	public void run() {
516	<	assertNull(q.poll());
517	<	try {
518	<	assertTrue(null != q.poll(MEDIUM_DELAY_MS * 2, TimeUnit.MILLISECONDS));
508	>	/**
509	>	* timed poll retrieves elements across Executor threads
510	>	*/
511	>	public void testPollInExecutor()      { testPollInExecutor(false); }
512	>	public void testPollInExecutor_fair() { testPollInExecutor(true); }
513	>	public void testPollInExecutor(boolean fair) {
514	>	final SynchronousQueue q = new SynchronousQueue(fair);
515	>	final CheckedBarrier threadsStarted = new CheckedBarrier(2);
516	>	final ExecutorService executor = Executors.newFixedThreadPool(2);
517	>	try (PoolCleaner cleaner = cleaner(executor)) {
518	>	executor.execute(new CheckedRunnable() {
519	>	public void realRun() throws InterruptedException {
520	>	assertNull(q.poll());
521	>	threadsStarted.await();
522	>	assertSame(one, q.poll(LONG_DELAY_MS, MILLISECONDS));
523		assertTrue(q.isEmpty());
524	<	}
422	<	catch (InterruptedException e) {
423	<	fail("should not be interrupted");
424	<	}
425	<	}
426	<	});
427	<
428	<	executor.execute(new Runnable() {
429	<	public void run() {
430	<	try {
431	<	Thread.sleep(MEDIUM_DELAY_MS);
432	<	q.put(new Integer(1));
433	<	}
434	<	catch (InterruptedException e) {
435	<	fail("should not be interrupted");
436	<	}
437	<	}
438	<	});
439	<
440	<	executor.shutdown();
524	>	}});
525
526	+	executor.execute(new CheckedRunnable() {
527	+	public void realRun() throws InterruptedException {
528	+	threadsStarted.await();
529	+	q.put(one);
530	+	}});
531	+	}
532		}
533
534	+	/**
535	+	* a deserialized/reserialized queue is usable
536	+	*/
537		public void testSerialization() {
538	<	SynchronousQueue q = new SynchronousQueue();
539	<	try {
540	<	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
541	<	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
542	<	out.writeObject(q);
543	<	out.close();
544	<
545	<	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
546	<	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
547	<	SynchronousQueue r = (SynchronousQueue)in.readObject();
548	<	assertEquals(q.size(), r.size());
549	<	while (!q.isEmpty())
550	<	assertEquals(q.remove(), r.remove());
551	<	} catch(Exception e){
459	<	fail("unexpected exception");
538	>	final SynchronousQueue x = new SynchronousQueue();
539	>	final SynchronousQueue y = new SynchronousQueue(false);
540	>	final SynchronousQueue z = new SynchronousQueue(true);
541	>	assertSerialEquals(x, y);
542	>	assertNotSerialEquals(x, z);
543	>	SynchronousQueue[] qs = { x, y, z };
544	>	for (SynchronousQueue q : qs) {
545	>	SynchronousQueue clone = serialClone(q);
546	>	assertNotSame(q, clone);
547	>	assertSerialEquals(q, clone);
548	>	assertTrue(clone.isEmpty());
549	>	assertEquals(0, clone.size());
550	>	assertEquals(0, clone.remainingCapacity());
551	>	assertFalse(clone.offer(zero));
552		}
553		}
554
555	+	/**
556	+	* drainTo(c) of empty queue doesn't transfer elements
557	+	*/
558	+	public void testDrainTo()      { testDrainTo(false); }
559	+	public void testDrainTo_fair() { testDrainTo(true); }
560	+	public void testDrainTo(boolean fair) {
561	+	final SynchronousQueue q = new SynchronousQueue(fair);
562	+	ArrayList l = new ArrayList();
563	+	q.drainTo(l);
564	+	assertEquals(0, q.size());
565	+	assertEquals(0, l.size());
566	+	}
567	+
568	+	/**
569	+	* drainTo empties queue, unblocking a waiting put.
570	+	*/
571	+	public void testDrainToWithActivePut()      { testDrainToWithActivePut(false); }
572	+	public void testDrainToWithActivePut_fair() { testDrainToWithActivePut(true); }
573	+	public void testDrainToWithActivePut(boolean fair) {
574	+	final SynchronousQueue q = new SynchronousQueue(fair);
575	+	Thread t = newStartedThread(new CheckedRunnable() {
576	+	public void realRun() throws InterruptedException {
577	+	q.put(one);
578	+	}});
579	+
580	+	ArrayList l = new ArrayList();
581	+	long startTime = System.nanoTime();
582	+	while (l.isEmpty()) {
583	+	q.drainTo(l);
584	+	if (millisElapsedSince(startTime) > LONG_DELAY_MS)
585	+	fail("timed out");
586	+	Thread.yield();
587	+	}
588	+	assertEquals(1, l.size());
589	+	assertSame(one, l.get(0));
590	+	awaitTermination(t);
591	+	}
592	+
593	+	/**
594	+	* drainTo(c, n) empties up to n elements of queue into c
595	+	*/
596	+	public void testDrainToN() throws InterruptedException {
597	+	final SynchronousQueue q = new SynchronousQueue();
598	+	Thread t1 = newStartedThread(new CheckedRunnable() {
599	+	public void realRun() throws InterruptedException {
600	+	q.put(one);
601	+	}});
602	+
603	+	Thread t2 = newStartedThread(new CheckedRunnable() {
604	+	public void realRun() throws InterruptedException {
605	+	q.put(two);
606	+	}});
607	+
608	+	ArrayList l = new ArrayList();
609	+	int drained;
610	+	while ((drained = q.drainTo(l, 1)) == 0) Thread.yield();
611	+	assertEquals(1, drained);
612	+	assertEquals(1, l.size());
613	+	while ((drained = q.drainTo(l, 1)) == 0) Thread.yield();
614	+	assertEquals(1, drained);
615	+	assertEquals(2, l.size());
616	+	assertTrue(l.contains(one));
617	+	assertTrue(l.contains(two));
618	+	awaitTermination(t1);
619	+	awaitTermination(t2);
620	+	}
621	+
622	+	/**
623	+	* remove(null), contains(null) always return false
624	+	*/
625	+	public void testNeverContainsNull() {
626	+	Collection<?> q = new SynchronousQueue();
627	+	assertFalse(q.contains(null));
628	+	assertFalse(q.remove(null));
629	+	}
630	+
631		}

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