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

Comparing jsr166/src/test/tck/LinkedTransferQueueTest.java (file contents):
Revision 1.17 by jsr166, Sat Nov 21 19:45:16 2009 UTC vs.
Revision 1.86 by dl, Tue Jan 26 13:33:06 2021 UTC

#	Line 1 | Line 1
1		/*
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/licenses/publicdomain
4	>	* http://creativecommons.org/publicdomain/zero/1.0/
5		* Other contributors include John Vint
6		*/
7
8	<	import java.io.BufferedInputStream;
9	<	import java.io.BufferedOutputStream;
10	<	import java.io.ByteArrayInputStream;
11	<	import java.io.ByteArrayOutputStream;
12	<	import java.io.ObjectInputStream;
13	<	import java.io.ObjectOutputStream;
8	>	import static java.util.concurrent.TimeUnit.MILLISECONDS;
9	>
10		import java.util.ArrayList;
11		import java.util.Arrays;
12	+	import java.util.Collection;
13		import java.util.Iterator;
14		import java.util.List;
15		import java.util.NoSuchElementException;
16	<	import java.util.concurrent.*;
17	<	import static java.util.concurrent.TimeUnit.MILLISECONDS;
16	>	import java.util.Queue;
17	>	import java.util.concurrent.BlockingQueue;
18	>	import java.util.concurrent.Callable;
19	>	import java.util.concurrent.CountDownLatch;
20	>	import java.util.concurrent.Executors;
21	>	import java.util.concurrent.ExecutorService;
22	>	import java.util.concurrent.LinkedTransferQueue;
23	>
24		import junit.framework.Test;
22	–	import junit.framework.TestSuite;
25
26		@SuppressWarnings({"unchecked", "rawtypes"})
27		public class LinkedTransferQueueTest extends JSR166TestCase {
28	+	public static class Generic extends BlockingQueueTest {
29	+	protected BlockingQueue emptyCollection() {
30	+	return new LinkedTransferQueue();
31	+	}
32	+	}
33
34		public static void main(String[] args) {
35	<	junit.textui.TestRunner.run(suite());
35	>	main(suite(), args);
36		}
37
38		public static Test suite() {
39	<	return new TestSuite(LinkedTransferQueueTest.class);
40	<	}
41	<
42	<	void checkEmpty(LinkedTransferQueue q) throws InterruptedException {
43	<	assertTrue(q.isEmpty());
44	<	assertEquals(0, q.size());
45	<	assertNull(q.peek());
46	<	assertNull(q.poll());
47	<	assertNull(q.poll(0, MILLISECONDS));
48	<	assertEquals(q.toString(), "[]");
42	<	assertTrue(Arrays.equals(q.toArray(), new Object[0]));
43	<	assertFalse(q.iterator().hasNext());
44	<	try {
45	<	q.element();
46	<	shouldThrow();
47	<	} catch (NoSuchElementException success) {}
48	<	try {
49	<	q.iterator().next();
50	<	shouldThrow();
51	<	} catch (NoSuchElementException success) {}
52	<	try {
53	<	q.remove();
54	<	shouldThrow();
55	<	} catch (NoSuchElementException success) {}
39	>	class Implementation implements CollectionImplementation {
40	>	public Class<?> klazz() { return LinkedTransferQueue.class; }
41	>	public Collection emptyCollection() { return new LinkedTransferQueue(); }
42	>	public Object makeElement(int i) { return JSR166TestCase.itemFor(i); }
43	>	public boolean isConcurrent() { return true; }
44	>	public boolean permitsNulls() { return false; }
45	>	}
46	>	return newTestSuite(LinkedTransferQueueTest.class,
47	>	new Generic().testSuite(),
48	>	CollectionTest.testSuite(new Implementation()));
49		}
50
51		/**
#	Line 60 | Line 53 | public class LinkedTransferQueueTest ext
53		* being true
54		*/
55		public void testConstructor1() {
56	<	assertEquals(0, new LinkedTransferQueue().size());
56	>	mustEqual(0, new LinkedTransferQueue().size());
57		assertTrue(new LinkedTransferQueue().isEmpty());
58		}
59
#	Line 80 | Line 73 | public class LinkedTransferQueueTest ext
73		* NullPointerException
74		*/
75		public void testConstructor3() {
76	+	Collection<Item> elements = Arrays.asList(new Item[SIZE]);
77		try {
78	<	Integer[] ints = new Integer[SIZE];
85	<	new LinkedTransferQueue(Arrays.asList(ints));
78	>	new LinkedTransferQueue(elements);
79		shouldThrow();
80		} catch (NullPointerException success) {}
81		}
#	Line 92 | Line 85 | public class LinkedTransferQueueTest ext
85		* throws NullPointerException
86		*/
87		public void testConstructor4() {
88	+	Item[] items = new Item[2];
89	+	items[0] = zero;
90	+	Collection<Item> elements = Arrays.asList(items);
91		try {
92	<	Integer[] ints = new Integer[SIZE];
97	<	for (int i = 0; i < SIZE - 1; ++i) {
98	<	ints[i] = i;
99	<	}
100	<	new LinkedTransferQueue(Arrays.asList(ints));
92	>	new LinkedTransferQueue(elements);
93		shouldThrow();
94		} catch (NullPointerException success) {}
95		}
#	Line 106 | Line 98 | public class LinkedTransferQueueTest ext
98		* Queue contains all elements of the collection it is initialized by
99		*/
100		public void testConstructor5() {
101	<	Integer[] ints = new Integer[SIZE];
102	<	for (int i = 0; i < SIZE; ++i) {
103	<	ints[i] = i;
104	<	}
105	<	List intList = Arrays.asList(ints);
106	<	LinkedTransferQueue q
115	<	= new LinkedTransferQueue(intList);
116	<	assertEquals(q.size(), intList.size());
117	<	assertEquals(q.toString(), intList.toString());
101	>	Item[] items = defaultItems;
102	>	List<Item> intList = Arrays.asList(items);
103	>	LinkedTransferQueue<Item> q
104	>	= new LinkedTransferQueue<Item>(intList);
105	>	mustEqual(q.size(), intList.size());
106	>	mustEqual(q.toString(), intList.toString());
107		assertTrue(Arrays.equals(q.toArray(),
108		intList.toArray()));
109		assertTrue(Arrays.equals(q.toArray(new Object[0]),
#	Line 122 | Line 111 | public class LinkedTransferQueueTest ext
111		assertTrue(Arrays.equals(q.toArray(new Object[SIZE]),
112		intList.toArray(new Object[SIZE])));
113		for (int i = 0; i < SIZE; ++i) {
114	<	assertEquals(ints[i], q.poll());
114	>	mustEqual(items[i], q.poll());
115		}
116		}
117
#	Line 130 | Line 119 | public class LinkedTransferQueueTest ext
119		* remainingCapacity() always returns Integer.MAX_VALUE
120		*/
121		public void testRemainingCapacity() {
122	<	LinkedTransferQueue<Integer> q = populatedQueue(SIZE);
122	>	BlockingQueue<Item> q = populatedQueue(SIZE);
123		for (int i = 0; i < SIZE; ++i) {
124	<	assertEquals(Integer.MAX_VALUE, q.remainingCapacity());
125	<	assertEquals(SIZE - i, q.size());
126	<	q.remove();
124	>	mustEqual(Integer.MAX_VALUE, q.remainingCapacity());
125	>	mustEqual(SIZE - i, q.size());
126	>	mustEqual(i, q.remove());
127		}
128		for (int i = 0; i < SIZE; ++i) {
129	<	assertEquals(Integer.MAX_VALUE, q.remainingCapacity());
130	<	assertEquals(i, q.size());
131	<	q.add(i);
129	>	mustEqual(Integer.MAX_VALUE, q.remainingCapacity());
130	>	mustEqual(i, q.size());
131	>	mustAdd(q, i);
132		}
133		}
134
135		/**
147	–	* offer(null) throws NullPointerException
148	–	*/
149	–	public void testOfferNull() {
150	–	try {
151	–	LinkedTransferQueue q = new LinkedTransferQueue();
152	–	q.offer(null);
153	–	shouldThrow();
154	–	} catch (NullPointerException success) {}
155	–	}
156	–
157	–	/**
158	–	* add(null) throws NullPointerException
159	–	*/
160	–	public void testAddNull() {
161	–	try {
162	–	LinkedTransferQueue q = new LinkedTransferQueue();
163	–	q.add(null);
164	–	shouldThrow();
165	–	} catch (NullPointerException success) {}
166	–	}
167	–
168	–	/**
169	–	* addAll(null) throws NullPointerException
170	–	*/
171	–	public void testAddAll1() {
172	–	try {
173	–	LinkedTransferQueue q = new LinkedTransferQueue();
174	–	q.addAll(null);
175	–	shouldThrow();
176	–	} catch (NullPointerException success) {}
177	–	}
178	–
179	–	/**
136		* addAll(this) throws IllegalArgumentException
137		*/
138		public void testAddAllSelf() {
139	+	LinkedTransferQueue<Item> q = populatedQueue(SIZE);
140		try {
184	–	LinkedTransferQueue q = populatedQueue(SIZE);
141		q.addAll(q);
142		shouldThrow();
143		} catch (IllegalArgumentException success) {}
144		}
145
146		/**
191	–	* addAll of a collection with null elements throws NullPointerException
192	–	*/
193	–	public void testAddAll2() {
194	–	try {
195	–	LinkedTransferQueue q = new LinkedTransferQueue();
196	–	Integer[] ints = new Integer[SIZE];
197	–	q.addAll(Arrays.asList(ints));
198	–	shouldThrow();
199	–	} catch (NullPointerException success) {}
200	–	}
201	–
202	–	/**
147		* addAll of a collection with any null elements throws
148		* NullPointerException after possibly adding some elements
149		*/
150		public void testAddAll3() {
151	+	LinkedTransferQueue<Item> q = new LinkedTransferQueue<Item>();
152	+	Item[] items = new Item[2]; items[0] = zero;
153		try {
154	<	LinkedTransferQueue q = new LinkedTransferQueue();
209	<	Integer[] ints = new Integer[SIZE];
210	<	for (int i = 0; i < SIZE - 1; ++i) {
211	<	ints[i] = i;
212	<	}
213	<	q.addAll(Arrays.asList(ints));
154	>	q.addAll(Arrays.asList(items));
155		shouldThrow();
156		} catch (NullPointerException success) {}
157		}
#	Line 219 | Line 160 | public class LinkedTransferQueueTest ext
160		* Queue contains all elements, in traversal order, of successful addAll
161		*/
162		public void testAddAll5() {
163	<	Integer[] empty = new Integer[0];
164	<	Integer[] ints = new Integer[SIZE];
224	<	for (int i = 0; i < SIZE; ++i) {
225	<	ints[i] = i;
226	<	}
163	>	Item[] empty = new Item[0];
164	>	Item[] items = defaultItems;
165		LinkedTransferQueue q = new LinkedTransferQueue();
166		assertFalse(q.addAll(Arrays.asList(empty)));
167	<	assertTrue(q.addAll(Arrays.asList(ints)));
167	>	assertTrue(q.addAll(Arrays.asList(items)));
168		for (int i = 0; i < SIZE; ++i) {
169	<	assertEquals(ints[i], q.poll());
169	>	mustEqual(items[i], q.poll());
170		}
171		}
172
173		/**
236	–	* put(null) throws NullPointerException
237	–	*/
238	–	public void testPutNull() throws InterruptedException {
239	–	try {
240	–	LinkedTransferQueue q = new LinkedTransferQueue();
241	–	q.put(null);
242	–	shouldThrow();
243	–	} catch (NullPointerException success) {}
244	–	}
245	–
246	–	/**
174		* all elements successfully put are contained
175		*/
176		public void testPut() {
177	<	LinkedTransferQueue<Integer> q = new LinkedTransferQueue<Integer>();
177	>	LinkedTransferQueue<Item> q = new LinkedTransferQueue<>();
178	>	Item[] items = defaultItems;
179		for (int i = 0; i < SIZE; ++i) {
180	<	assertEquals(q.size(), i);
181	<	q.put(i);
182	<	assertTrue(q.contains(i));
180	>	mustEqual(i, q.size());
181	>	q.put(items[i]);
182	>	mustContain(q, items[i]);
183		}
184		}
185
#	Line 259 | Line 187 | public class LinkedTransferQueueTest ext
187		* take retrieves elements in FIFO order
188		*/
189		public void testTake() throws InterruptedException {
190	<	LinkedTransferQueue<Integer> q = populatedQueue(SIZE);
190	>	LinkedTransferQueue<Item> q = populatedQueue(SIZE);
191		for (int i = 0; i < SIZE; ++i) {
192	<	assertEquals(i, (int) q.take());
192	>	mustEqual(i, q.take());
193		}
194		}
195
196		/**
197	<	* take blocks interruptibly when empty
270	<	*/
271	<	public void testTakeFromEmpty() throws InterruptedException {
272	<	final LinkedTransferQueue q = new LinkedTransferQueue();
273	<	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
274	<	void realRun() throws InterruptedException {
275	<	q.take();
276	<	}});
277	<	Thread.sleep(SHORT_DELAY_MS);
278	<	t.interrupt();
279	<	t.join();
280	<	}
281	<
282	<	/**
283	<	* Take removes existing elements until empty, then blocks interruptibly
197	>	* take removes existing elements until empty, then blocks interruptibly
198		*/
199		public void testBlockingTake() throws InterruptedException {
200	<	final LinkedTransferQueue<Integer> q = populatedQueue(SIZE);
201	<	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
202	<	void realRun() throws InterruptedException {
203	<	for (int i = 0; i < SIZE; ++i) {
204	<	threadAssertEquals(i, (int) q.take());
205	<	}
206	<	q.take();
200	>	final BlockingQueue<Item> q = populatedQueue(SIZE);
201	>	final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
202	>	Thread t = newStartedThread(new CheckedRunnable() {
203	>	public void realRun() throws InterruptedException {
204	>	for (int i = 0; i < SIZE; i++) mustEqual(i, q.take());
205	>
206	>	Thread.currentThread().interrupt();
207	>	try {
208	>	q.take();
209	>	shouldThrow();
210	>	} catch (InterruptedException success) {}
211	>	assertFalse(Thread.interrupted());
212	>
213	>	pleaseInterrupt.countDown();
214	>	try {
215	>	q.take();
216	>	shouldThrow();
217	>	} catch (InterruptedException success) {}
218	>	assertFalse(Thread.interrupted());
219		}});
220	<	Thread.sleep(SMALL_DELAY_MS);
220	>
221	>	await(pleaseInterrupt);
222	>	if (randomBoolean()) assertThreadBlocks(t, Thread.State.WAITING);
223		t.interrupt();
224	<	t.join();
297	<	checkEmpty(q);
224	>	awaitTermination(t);
225		}
226
227		/**
228		* poll succeeds unless empty
229		*/
230		public void testPoll() throws InterruptedException {
231	<	LinkedTransferQueue<Integer> q = populatedQueue(SIZE);
231	>	LinkedTransferQueue<Item> q = populatedQueue(SIZE);
232		for (int i = 0; i < SIZE; ++i) {
233	<	assertEquals(i, (int) q.poll());
233	>	mustEqual(i, q.poll());
234		}
235		assertNull(q.poll());
236		checkEmpty(q);
237		}
238
239		/**
240	<	* timed pool with zero timeout succeeds when non-empty, else times out
240	>	* timed poll with zero timeout succeeds when non-empty, else times out
241		*/
242		public void testTimedPoll0() throws InterruptedException {
243	<	LinkedTransferQueue<Integer> q = populatedQueue(SIZE);
243	>	LinkedTransferQueue<Item> q = populatedQueue(SIZE);
244		for (int i = 0; i < SIZE; ++i) {
245	<	assertEquals(i, (int) q.poll(0, MILLISECONDS));
245	>	mustEqual(i, q.poll(0, MILLISECONDS));
246		}
247		assertNull(q.poll(0, MILLISECONDS));
248		checkEmpty(q);
249		}
250
251		/**
252	<	* timed pool with nonzero timeout succeeds when non-empty, else times out
252	>	* timed poll with nonzero timeout succeeds when non-empty, else times out
253		*/
254		public void testTimedPoll() throws InterruptedException {
255	<	LinkedTransferQueue<Integer> q = populatedQueue(SIZE);
256	<	for (int i = 0; i < SIZE; ++i) {
257	<	long t0 = System.nanoTime();
258	<	assertEquals(i, (int) q.poll(LONG_DELAY_MS, MILLISECONDS));
259	<	long millisElapsed = (System.nanoTime() - t0)/(1024 * 1024);
260	<	assertTrue(millisElapsed < SMALL_DELAY_MS);
261	<	}
262	<	assertNull(q.poll(SHORT_DELAY_MS, MILLISECONDS));
255	>	LinkedTransferQueue<Item> q = populatedQueue(SIZE);
256	>	long startTime = System.nanoTime();
257	>	for (int i = 0; i < SIZE; ++i)
258	>	mustEqual(i, q.poll(LONG_DELAY_MS, MILLISECONDS));
259	>	assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS);
260	>
261	>	startTime = System.nanoTime();
262	>	assertNull(q.poll(timeoutMillis(), MILLISECONDS));
263	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
264		checkEmpty(q);
265		}
266
#	Line 341 | Line 269 | public class LinkedTransferQueueTest ext
269		* returning timeout status
270		*/
271		public void testInterruptedTimedPoll() throws InterruptedException {
272	<	final LinkedTransferQueue<Integer> q = populatedQueue(SIZE);
272	>	final BlockingQueue<Item> q = populatedQueue(SIZE);
273	>	final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
274		Thread t = newStartedThread(new CheckedRunnable() {
275	<	void realRun() throws InterruptedException {
276	<	for (int i = 0; i < SIZE; ++i) {
277	<	long t0 = System.nanoTime();
278	<	threadAssertEquals(i, (int) q.poll(LONG_DELAY_MS,
279	<	MILLISECONDS));
351	<	long millisElapsed = (System.nanoTime() - t0)/(1024 * 1024);
352	<	assertTrue(millisElapsed < SMALL_DELAY_MS);
353	<	}
275	>	public void realRun() throws InterruptedException {
276	>	for (int i = 0; i < SIZE; i++)
277	>	mustEqual(i, q.poll(LONG_DELAY_MS, MILLISECONDS));
278	>
279	>	Thread.currentThread().interrupt();
280		try {
281	<	q.poll(LONG_DELAY_MS, MILLISECONDS);
281	>	q.poll(randomTimeout(), randomTimeUnit());
282		shouldThrow();
283		} catch (InterruptedException success) {}
284	+	assertFalse(Thread.interrupted());
285	+
286	+	pleaseInterrupt.countDown();
287	+	try {
288	+	q.poll(LONGER_DELAY_MS, MILLISECONDS);
289	+	shouldThrow();
290	+	} catch (InterruptedException success) {}
291	+	assertFalse(Thread.interrupted());
292		}});
293
294	<	Thread.sleep(SMALL_DELAY_MS);
294	>	await(pleaseInterrupt);
295	>	if (randomBoolean()) assertThreadBlocks(t, Thread.State.TIMED_WAITING);
296		t.interrupt();
297	<	t.join();
297	>	awaitTermination(t);
298		checkEmpty(q);
299		}
300
301		/**
302	<	* timed poll before a delayed offer fails; after offer succeeds;
303	<	* on interruption throws
302	>	* timed poll after thread interrupted throws InterruptedException
303	>	* instead of returning timeout status
304		*/
305	<	public void testTimedPollWithOffer() throws InterruptedException {
306	<	final LinkedTransferQueue q = new LinkedTransferQueue();
307	<	Thread t = newStartedThread(new CheckedInterruptedRunnable() {
308	<	void realRun() throws InterruptedException {
309	<	threadAssertNull(q.poll(SHORT_DELAY_MS, MILLISECONDS));
310	<	q.poll(LONG_DELAY_MS, MILLISECONDS);
311	<	q.poll(LONG_DELAY_MS, MILLISECONDS);
305	>	public void testTimedPollAfterInterrupt() throws InterruptedException {
306	>	final BlockingQueue<Item> q = populatedQueue(SIZE);
307	>	Thread t = newStartedThread(new CheckedRunnable() {
308	>	public void realRun() throws InterruptedException {
309	>	Thread.currentThread().interrupt();
310	>	for (int i = 0; i < SIZE; ++i)
311	>	mustEqual(i, q.poll(randomTimeout(), randomTimeUnit()));
312	>	try {
313	>	q.poll(randomTimeout(), randomTimeUnit());
314	>	shouldThrow();
315	>	} catch (InterruptedException success) {}
316	>	assertFalse(Thread.interrupted());
317		}});
318	<	Thread.sleep(SMALL_DELAY_MS);
319	<	assertTrue(q.offer(zero, SHORT_DELAY_MS, MILLISECONDS));
320	<	t.interrupt();
381	<	t.join();
318	>
319	>	awaitTermination(t);
320	>	checkEmpty(q);
321		}
322
323		/**
324		* peek returns next element, or null if empty
325		*/
326		public void testPeek() throws InterruptedException {
327	<	LinkedTransferQueue<Integer> q = populatedQueue(SIZE);
327	>	LinkedTransferQueue<Item> q = populatedQueue(SIZE);
328		for (int i = 0; i < SIZE; ++i) {
329	<	assertEquals(i, (int) q.peek());
330	<	assertEquals(i, (int) q.poll());
329	>	mustEqual(i, q.peek());
330	>	mustEqual(i, q.poll());
331		assertTrue(q.peek() == null ||
332	<	i != (int) q.peek());
332	>	i != q.peek().value);
333		}
334		assertNull(q.peek());
335		checkEmpty(q);
#	Line 400 | Line 339 | public class LinkedTransferQueueTest ext
339		* element returns next element, or throws NoSuchElementException if empty
340		*/
341		public void testElement() throws InterruptedException {
342	<	LinkedTransferQueue<Integer> q = populatedQueue(SIZE);
342	>	LinkedTransferQueue<Item> q = populatedQueue(SIZE);
343		for (int i = 0; i < SIZE; ++i) {
344	<	assertEquals(i, (int) q.element());
345	<	assertEquals(i, (int) q.poll());
344	>	mustEqual(i, q.element());
345	>	mustEqual(i, q.poll());
346		}
347		try {
348		q.element();
#	Line 416 | Line 355 | public class LinkedTransferQueueTest ext
355		* remove removes next element, or throws NoSuchElementException if empty
356		*/
357		public void testRemove() throws InterruptedException {
358	<	LinkedTransferQueue<Integer> q = populatedQueue(SIZE);
358	>	LinkedTransferQueue<Item> q = populatedQueue(SIZE);
359		for (int i = 0; i < SIZE; ++i) {
360	<	assertEquals(i, (int) q.remove());
360	>	mustEqual(i, q.remove());
361		}
362		try {
363		q.remove();
#	Line 428 | Line 367 | public class LinkedTransferQueueTest ext
367		}
368
369		/**
431	–	* remove(x) removes x and returns true if present
432	–	*/
433	–	public void testRemoveElement() throws InterruptedException {
434	–	LinkedTransferQueue q = populatedQueue(SIZE);
435	–	for (int i = 1; i < SIZE; i += 2) {
436	–	assertTrue(q.remove(i));
437	–	}
438	–	for (int i = 0; i < SIZE; i += 2) {
439	–	assertTrue(q.remove(i));
440	–	assertFalse(q.remove(i + 1));
441	–	}
442	–	checkEmpty(q);
443	–	}
444	–
445	–	/**
370		* An add following remove(x) succeeds
371		*/
372		public void testRemoveElementAndAdd() throws InterruptedException {
373	<	LinkedTransferQueue q = new LinkedTransferQueue();
374	<	assertTrue(q.add(one));
375	<	assertTrue(q.add(two));
376	<	assertTrue(q.remove(one));
377	<	assertTrue(q.remove(two));
378	<	assertTrue(q.add(three));
379	<	assertTrue(q.take() == three);
373	>	LinkedTransferQueue<Item> q = new LinkedTransferQueue<Item>();
374	>	mustAdd(q, one);
375	>	mustAdd(q, two);
376	>	mustRemove(q, one);
377	>	mustRemove(q, two);
378	>	mustAdd(q, three);
379	>	mustEqual(q.take(), three);
380		}
381
382		/**
383		* contains(x) reports true when elements added but not yet removed
384		*/
385		public void testContains() {
386	<	LinkedTransferQueue<Integer> q = populatedQueue(SIZE);
386	>	LinkedTransferQueue<Item> q = populatedQueue(SIZE);
387		for (int i = 0; i < SIZE; ++i) {
388	<	assertTrue(q.contains(i));
389	<	assertEquals(i, (int) q.poll());
390	<	assertFalse(q.contains(i));
388	>	mustContain(q, i);
389	>	mustEqual(i, q.poll());
390	>	mustNotContain(q, i);
391		}
392		}
393
#	Line 471 | Line 395 | public class LinkedTransferQueueTest ext
395		* clear removes all elements
396		*/
397		public void testClear() throws InterruptedException {
398	<	LinkedTransferQueue q = populatedQueue(SIZE);
398	>	LinkedTransferQueue<Item> q = populatedQueue(SIZE);
399		q.clear();
400		checkEmpty(q);
401	<	assertEquals(Integer.MAX_VALUE, q.remainingCapacity());
401	>	mustEqual(Integer.MAX_VALUE, q.remainingCapacity());
402		q.add(one);
403		assertFalse(q.isEmpty());
404	<	assertEquals(1, q.size());
405	<	assertTrue(q.contains(one));
404	>	mustEqual(1, q.size());
405	>	mustContain(q, one);
406		q.clear();
407		checkEmpty(q);
408		}
#	Line 487 | Line 411 | public class LinkedTransferQueueTest ext
411		* containsAll(c) is true when c contains a subset of elements
412		*/
413		public void testContainsAll() {
414	<	LinkedTransferQueue<Integer> q = populatedQueue(SIZE);
415	<	LinkedTransferQueue<Integer> p = new LinkedTransferQueue<Integer>();
414	>	LinkedTransferQueue<Item> q = populatedQueue(SIZE);
415	>	LinkedTransferQueue<Item> p = new LinkedTransferQueue<>();
416		for (int i = 0; i < SIZE; ++i) {
417		assertTrue(q.containsAll(p));
418		assertFalse(p.containsAll(q));
419	<	p.add(i);
419	>	mustAdd(p, i);
420		}
421		assertTrue(p.containsAll(q));
422		}
#	Line 502 | Line 426 | public class LinkedTransferQueueTest ext
426		* if changed
427		*/
428		public void testRetainAll() {
429	<	LinkedTransferQueue q = populatedQueue(SIZE);
430	<	LinkedTransferQueue p = populatedQueue(SIZE);
429	>	LinkedTransferQueue<Item> q = populatedQueue(SIZE);
430	>	LinkedTransferQueue<Item> p = populatedQueue(SIZE);
431		for (int i = 0; i < SIZE; ++i) {
432		boolean changed = q.retainAll(p);
433		if (i == 0) {
#	Line 512 | Line 436 | public class LinkedTransferQueueTest ext
436		assertTrue(changed);
437		}
438		assertTrue(q.containsAll(p));
439	<	assertEquals(SIZE - i, q.size());
439	>	mustEqual(SIZE - i, q.size());
440		p.remove();
441		}
442		}
#	Line 523 | Line 447 | public class LinkedTransferQueueTest ext
447		*/
448		public void testRemoveAll() {
449		for (int i = 1; i < SIZE; ++i) {
450	<	LinkedTransferQueue q = populatedQueue(SIZE);
451	<	LinkedTransferQueue p = populatedQueue(i);
450	>	LinkedTransferQueue<Item> q = populatedQueue(SIZE);
451	>	LinkedTransferQueue<Item> p = populatedQueue(i);
452		assertTrue(q.removeAll(p));
453	<	assertEquals(SIZE - i, q.size());
453	>	mustEqual(SIZE - i, q.size());
454		for (int j = 0; j < i; ++j) {
455	<	assertFalse(q.contains(p.remove()));
455	>	mustNotContain(q, p.remove());
456		}
457		}
458		}
459
460		/**
461	<	* toArray() contains all elements
538	<	*/
539	<	public void testToArray() throws InterruptedException {
540	<	LinkedTransferQueue q = populatedQueue(SIZE);
541	<	Object[] o = q.toArray();
542	<	for (int i = 0; i < o.length; i++) {
543	<	assertEquals(o[i], q.take());
544	<	}
545	<	}
546	<
547	<	/**
548	<	* toArray(a) contains all elements
461	>	* toArray() contains all elements in FIFO order
462		*/
463	<	public void testToArray2() throws InterruptedException {
464	<	LinkedTransferQueue<Integer> q = populatedQueue(SIZE);
465	<	Integer[] ints = new Integer[SIZE];
466	<	ints = q.toArray(ints);
467	<	for (int i = 0; i < ints.length; i++) {
468	<	assertEquals(ints[i], q.take());
469	<	}
463	>	public void testToArray() {
464	>	LinkedTransferQueue<Item> q = populatedQueue(SIZE);
465	>	Object[] a = q.toArray();
466	>	assertSame(Object[].class, a.getClass());
467	>	for (Object o : a)
468	>	assertSame(o, q.poll());
469	>	assertTrue(q.isEmpty());
470		}
471
472		/**
473	<	* toArray(null) throws NullPointerException
473	>	* toArray(a) contains all elements in FIFO order
474		*/
475	<	public void testToArray_BadArg() {
476	<	try {
477	<	LinkedTransferQueue q = populatedQueue(SIZE);
478	<	Object o[] = q.toArray(null);
479	<	shouldThrow();
480	<	} catch (NullPointerException success) {}
475	>	public void testToArray2() {
476	>	LinkedTransferQueue<Item> q = populatedQueue(SIZE);
477	>	Item[] items = new Item[SIZE];
478	>	Item[] array = q.toArray(items);
479	>	assertSame(items, array);
480	>	for (Item o : items)
481	>	assertSame(o, q.poll());
482	>	assertTrue(q.isEmpty());
483		}
484
485		/**
486	<	* toArray(incompatible array type) throws CCE
486	>	* toArray(incompatible array type) throws ArrayStoreException
487		*/
488		public void testToArray1_BadArg() {
489	+	LinkedTransferQueue<Item> q = populatedQueue(SIZE);
490		try {
491	<	LinkedTransferQueue q = populatedQueue(SIZE);
576	<	Object o[] = q.toArray(new String[10]);
491	>	q.toArray(new String[10]);
492		shouldThrow();
493		} catch (ArrayStoreException success) {}
494		}
#	Line 582 | Line 497 | public class LinkedTransferQueueTest ext
497		* iterator iterates through all elements
498		*/
499		public void testIterator() throws InterruptedException {
500	<	LinkedTransferQueue q = populatedQueue(SIZE);
501	<	Iterator it = q.iterator();
502	<	int i = 0;
503	<	while (it.hasNext()) {
504	<	assertEquals(it.next(), i++);
505	<	}
506	<	assertEquals(i, SIZE);
500	>	LinkedTransferQueue<Item> q = populatedQueue(SIZE);
501	>	Iterator<? extends Item> it = q.iterator();
502	>	int i;
503	>	for (i = 0; it.hasNext(); i++)
504	>	mustContain(q, it.next());
505	>	mustEqual(i, SIZE);
506	>	assertIteratorExhausted(it);
507	>
508	>	it = q.iterator();
509	>	for (i = 0; it.hasNext(); i++)
510	>	mustEqual(it.next(), q.take());
511	>	mustEqual(i, SIZE);
512	>	assertIteratorExhausted(it);
513	>	}
514	>
515	>	/**
516	>	* iterator of empty collection has no elements
517	>	*/
518	>	public void testEmptyIterator() {
519	>	assertIteratorExhausted(new LinkedTransferQueue().iterator());
520		}
521
522		/**
523		* iterator.remove() removes current element
524		*/
525		public void testIteratorRemove() {
526	<	final LinkedTransferQueue q = new LinkedTransferQueue();
526	>	final LinkedTransferQueue<Item> q = new LinkedTransferQueue<Item>();
527		q.add(two);
528		q.add(one);
529		q.add(three);
530
531	<	Iterator it = q.iterator();
531	>	Iterator<? extends Item> it = q.iterator();
532		it.next();
533		it.remove();
534
535		it = q.iterator();
536	<	assertEquals(it.next(), one);
537	<	assertEquals(it.next(), three);
536	>	assertSame(it.next(), one);
537	>	assertSame(it.next(), three);
538		assertFalse(it.hasNext());
539		}
540
#	Line 614 | Line 542 | public class LinkedTransferQueueTest ext
542		* iterator ordering is FIFO
543		*/
544		public void testIteratorOrdering() {
545	<	final LinkedTransferQueue<Integer> q
546	<	= new LinkedTransferQueue<Integer>();
619	<	assertEquals(Integer.MAX_VALUE, q.remainingCapacity());
545	>	final LinkedTransferQueue<Item> q = new LinkedTransferQueue<>();
546	>	mustEqual(Integer.MAX_VALUE, q.remainingCapacity());
547		q.add(one);
548		q.add(two);
549		q.add(three);
550	<	assertEquals(Integer.MAX_VALUE, q.remainingCapacity());
550	>	mustEqual(Integer.MAX_VALUE, q.remainingCapacity());
551		int k = 0;
552	<	for (Integer n : q) {
553	<	assertEquals(++k, (int) n);
552	>	for (Item n : q) {
553	>	mustEqual(++k, n);
554		}
555	<	assertEquals(3, k);
555	>	mustEqual(3, k);
556		}
557
558		/**
559		* Modifications do not cause iterators to fail
560		*/
561		public void testWeaklyConsistentIteration() {
562	<	final LinkedTransferQueue q = new LinkedTransferQueue();
562	>	final LinkedTransferQueue<Item> q = new LinkedTransferQueue<Item>();
563		q.add(one);
564		q.add(two);
565		q.add(three);
566	<	for (Iterator it = q.iterator(); it.hasNext();) {
566	>	for (Iterator<? extends Item> it = q.iterator(); it.hasNext();) {
567		q.remove();
568		it.next();
569		}
570	<	assertEquals(0, q.size());
570	>	mustEqual(0, q.size());
571		}
572
573		/**
574		* toString contains toStrings of elements
575		*/
576		public void testToString() {
577	<	LinkedTransferQueue q = populatedQueue(SIZE);
577	>	LinkedTransferQueue<Item> q = populatedQueue(SIZE);
578		String s = q.toString();
579		for (int i = 0; i < SIZE; ++i) {
580	<	assertTrue(s.indexOf(String.valueOf(i)) >= 0);
580	>	assertTrue(s.contains(String.valueOf(i)));
581		}
582		}
583
#	Line 658 | Line 585 | public class LinkedTransferQueueTest ext
585		* offer transfers elements across Executor tasks
586		*/
587		public void testOfferInExecutor() {
588	<	final LinkedTransferQueue q = new LinkedTransferQueue();
589	<	q.add(one);
590	<	q.add(two);
591	<	ExecutorService executor = Executors.newFixedThreadPool(2);
592	<
593	<	executor.execute(new CheckedRunnable() {
594	<	void realRun() {
595	<	threadAssertTrue(q.offer(three, MEDIUM_DELAY_MS,
596	<	MILLISECONDS));
597	<	}});
598	<
599	<	executor.execute(new CheckedRunnable() {
673	<	void realRun() throws InterruptedException {
674	<	Thread.sleep(SMALL_DELAY_MS);
675	<	threadAssertEquals(one, q.take());
676	<	}});
588	>	final LinkedTransferQueue<Item> q = new LinkedTransferQueue<Item>();
589	>	final CheckedBarrier threadsStarted = new CheckedBarrier(2);
590	>	final ExecutorService executor = Executors.newFixedThreadPool(2);
591	>	try (PoolCleaner cleaner = cleaner(executor)) {
592	>
593	>	executor.execute(new CheckedRunnable() {
594	>	public void realRun() throws InterruptedException {
595	>	threadsStarted.await();
596	>	long startTime = System.nanoTime();
597	>	assertTrue(q.offer(one, LONG_DELAY_MS, MILLISECONDS));
598	>	assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS);
599	>	}});
600
601	<	joinPool(executor);
601	>	executor.execute(new CheckedRunnable() {
602	>	public void realRun() throws InterruptedException {
603	>	threadsStarted.await();
604	>	assertSame(one, q.take());
605	>	checkEmpty(q);
606	>	}});
607	>	}
608		}
609
610		/**
611		* timed poll retrieves elements across Executor threads
612		*/
613		public void testPollInExecutor() {
614	<	final LinkedTransferQueue q = new LinkedTransferQueue();
615	<	ExecutorService executor = Executors.newFixedThreadPool(2);
616	<
617	<	executor.execute(new CheckedRunnable() {
618	<	void realRun() throws InterruptedException {
619	<	threadAssertNull(q.poll());
620	<	threadAssertTrue(null != q.poll(MEDIUM_DELAY_MS,
621	<	MILLISECONDS));
622	<	threadAssertTrue(q.isEmpty());
623	<	}});
624	<
625	<	executor.execute(new CheckedRunnable() {
626	<	void realRun() throws InterruptedException {
627	<	Thread.sleep(SMALL_DELAY_MS);
699	<	q.put(one);
700	<	}});
614	>	final LinkedTransferQueue<Item> q = new LinkedTransferQueue<Item>();
615	>	final CheckedBarrier threadsStarted = new CheckedBarrier(2);
616	>	final ExecutorService executor = Executors.newFixedThreadPool(2);
617	>	try (PoolCleaner cleaner = cleaner(executor)) {
618	>
619	>	executor.execute(new CheckedRunnable() {
620	>	public void realRun() throws InterruptedException {
621	>	assertNull(q.poll());
622	>	threadsStarted.await();
623	>	long startTime = System.nanoTime();
624	>	assertSame(one, q.poll(LONG_DELAY_MS, MILLISECONDS));
625	>	assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS);
626	>	checkEmpty(q);
627	>	}});
628
629	<	joinPool(executor);
629	>	executor.execute(new CheckedRunnable() {
630	>	public void realRun() throws InterruptedException {
631	>	threadsStarted.await();
632	>	q.put(one);
633	>	}});
634	>	}
635		}
636
637		/**
638	<	* A deserialized serialized queue has same elements in same order
638	>	* A deserialized/reserialized queue has same elements in same order
639		*/
640		public void testSerialization() throws Exception {
641	<	LinkedTransferQueue q = populatedQueue(SIZE);
641	>	Queue<Item> x = populatedQueue(SIZE);
642	>	Queue<Item> y = serialClone(x);
643
644	<	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
645	<	ObjectOutputStream out
646	<	= new ObjectOutputStream(new BufferedOutputStream(bout));
647	<	out.writeObject(q);
648	<	out.close();
649	<
650	<	ByteArrayInputStream bin
718	<	= new ByteArrayInputStream(bout.toByteArray());
719	<	ObjectInputStream in
720	<	= new ObjectInputStream(new BufferedInputStream(bin));
721	<	LinkedTransferQueue r = (LinkedTransferQueue) in.readObject();
722	<
723	<	assertEquals(q.size(), r.size());
724	<	while (!q.isEmpty()) {
725	<	assertEquals(q.remove(), r.remove());
644	>	assertNotSame(y, x);
645	>	mustEqual(x.size(), y.size());
646	>	mustEqual(x.toString(), y.toString());
647	>	assertTrue(Arrays.equals(x.toArray(), y.toArray()));
648	>	while (!x.isEmpty()) {
649	>	assertFalse(y.isEmpty());
650	>	mustEqual(x.remove(), y.remove());
651		}
652	<	}
728	<
729	<	/**
730	<	* drainTo(null) throws NullPointerException
731	<	*/
732	<	public void testDrainToNull() {
733	<	LinkedTransferQueue q = populatedQueue(SIZE);
734	<	try {
735	<	q.drainTo(null);
736	<	shouldThrow();
737	<	} catch (NullPointerException success) {}
738	<	}
739	<
740	<	/**
741	<	* drainTo(this) throws IllegalArgumentException
742	<	*/
743	<	public void testDrainToSelf() {
744	<	LinkedTransferQueue q = populatedQueue(SIZE);
745	<	try {
746	<	q.drainTo(q);
747	<	shouldThrow();
748	<	} catch (IllegalArgumentException success) {}
652	>	assertTrue(y.isEmpty());
653		}
654
655		/**
656		* drainTo(c) empties queue into another collection c
657		*/
658		public void testDrainTo() {
659	<	LinkedTransferQueue q = populatedQueue(SIZE);
659	>	LinkedTransferQueue<Item> q = populatedQueue(SIZE);
660		ArrayList l = new ArrayList();
661		q.drainTo(l);
662	<	assertEquals(q.size(), 0);
663	<	assertEquals(l.size(), SIZE);
662	>	mustEqual(0, q.size());
663	>	mustEqual(SIZE, l.size());
664		for (int i = 0; i < SIZE; ++i) {
665	<	assertEquals(l.get(i), i);
665	>	mustEqual(i, l.get(i));
666		}
667		q.add(zero);
668		q.add(one);
669		assertFalse(q.isEmpty());
670	<	assertTrue(q.contains(zero));
671	<	assertTrue(q.contains(one));
670	>	mustContain(q, zero);
671	>	mustContain(q, one);
672		l.clear();
673		q.drainTo(l);
674	<	assertEquals(q.size(), 0);
675	<	assertEquals(l.size(), 2);
674	>	mustEqual(0, q.size());
675	>	mustEqual(2, l.size());
676		for (int i = 0; i < 2; ++i) {
677	<	assertEquals(l.get(i), i);
677	>	mustEqual(i, l.get(i));
678		}
679		}
680
#	Line 778 | Line 682 | public class LinkedTransferQueueTest ext
682		* drainTo(c) empties full queue, unblocking a waiting put.
683		*/
684		public void testDrainToWithActivePut() throws InterruptedException {
685	<	final LinkedTransferQueue q = populatedQueue(SIZE);
685	>	final LinkedTransferQueue<Item> q = populatedQueue(SIZE);
686		Thread t = newStartedThread(new CheckedRunnable() {
687	<	void realRun() {
688	<	q.put(SIZE + 1);
687	>	public void realRun() {
688	>	q.put(new Item(SIZE + 1));
689		}});
690		ArrayList l = new ArrayList();
691		q.drainTo(l);
692		assertTrue(l.size() >= SIZE);
693	<	for (int i = 0; i < SIZE; ++i) {
694	<	assertEquals(l.get(i), i);
695	<	}
792	<	t.join();
693	>	for (int i = 0; i < SIZE; ++i)
694	>	mustEqual(i, l.get(i));
695	>	awaitTermination(t);
696		assertTrue(q.size() + l.size() >= SIZE);
697		}
698
699		/**
700	<	* drainTo(null, n) throws NullPointerException
798	<	*/
799	<	public void testDrainToNullN() {
800	<	LinkedTransferQueue q = populatedQueue(SIZE);
801	<	try {
802	<	q.drainTo(null, SIZE);
803	<	shouldThrow();
804	<	} catch (NullPointerException success) {}
805	<	}
806	<
807	<	/**
808	<	* drainTo(this, n) throws IllegalArgumentException
809	<	*/
810	<	public void testDrainToSelfN() {
811	<	LinkedTransferQueue q = populatedQueue(SIZE);
812	<	try {
813	<	q.drainTo(q, SIZE);
814	<	shouldThrow();
815	<	} catch (IllegalArgumentException success) {}
816	<	}
817	<
818	<	/**
819	<	* drainTo(c, n) empties first max {n, size} elements of queue into c
700	>	* drainTo(c, n) empties first min(n, size) elements of queue into c
701		*/
702		public void testDrainToN() {
703	<	LinkedTransferQueue q = new LinkedTransferQueue();
703	>	LinkedTransferQueue<Item> q = new LinkedTransferQueue<Item>();
704		for (int i = 0; i < SIZE + 2; ++i) {
705		for (int j = 0; j < SIZE; j++) {
706	<	assertTrue(q.offer(j));
706	>	mustOffer(q, j);
707		}
708		ArrayList l = new ArrayList();
709		q.drainTo(l, i);
710		int k = (i < SIZE) ? i : SIZE;
711	<	assertEquals(l.size(), k);
712	<	assertEquals(q.size(), SIZE - k);
713	<	for (int j = 0; j < k; ++j) {
714	<	assertEquals(l.get(j), j);
715	<	}
835	<	while (q.poll() != null)
836	<	;
711	>	mustEqual(k, l.size());
712	>	mustEqual(SIZE - k, q.size());
713	>	for (int j = 0; j < k; ++j)
714	>	mustEqual(j, l.get(j));
715	>	do {} while (q.poll() != null);
716		}
717		}
718
#	Line 842 | Line 721 | public class LinkedTransferQueueTest ext
721		* offer(e) decrements the waiting consumer count
722		*/
723		public void testWaitingConsumer() throws InterruptedException {
724	<	final LinkedTransferQueue q = new LinkedTransferQueue();
725	<	assertEquals(q.getWaitingConsumerCount(), 0);
724	>	final LinkedTransferQueue<Item> q = new LinkedTransferQueue<Item>();
725	>	mustEqual(0, q.getWaitingConsumerCount());
726		assertFalse(q.hasWaitingConsumer());
727	+	final CountDownLatch threadStarted = new CountDownLatch(1);
728
729		Thread t = newStartedThread(new CheckedRunnable() {
730	<	void realRun() throws InterruptedException {
731	<	Thread.sleep(SMALL_DELAY_MS);
732	<	threadAssertTrue(q.hasWaitingConsumer());
733	<	threadAssertEquals(q.getWaitingConsumerCount(), 1);
734	<	threadAssertTrue(q.offer(new Object()));
735	<	threadAssertFalse(q.hasWaitingConsumer());
736	<	threadAssertEquals(q.getWaitingConsumerCount(), 0);
730	>	public void realRun() throws InterruptedException {
731	>	threadStarted.countDown();
732	>	long startTime = System.nanoTime();
733	>	assertSame(one, q.poll(LONG_DELAY_MS, MILLISECONDS));
734	>	mustEqual(0, q.getWaitingConsumerCount());
735	>	assertFalse(q.hasWaitingConsumer());
736	>	assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS);
737		}});
738
739	<	assertTrue(q.poll(LONG_DELAY_MS, MILLISECONDS) != null);
740	<	assertEquals(q.getWaitingConsumerCount(), 0);
739	>	threadStarted.await();
740	>	Callable<Boolean> oneConsumer
741	>	= new Callable<Boolean>() { public Boolean call() {
742	>	return q.hasWaitingConsumer()
743	>	&& q.getWaitingConsumerCount() == 1; }};
744	>	waitForThreadToEnterWaitState(t, oneConsumer);
745	>
746	>	assertTrue(q.offer(one));
747	>	mustEqual(0, q.getWaitingConsumerCount());
748		assertFalse(q.hasWaitingConsumer());
749	<	t.join();
749	>
750	>	awaitTermination(t);
751		}
752
753		/**
#	Line 867 | Line 755 | public class LinkedTransferQueueTest ext
755		*/
756		public void testTransfer1() throws InterruptedException {
757		try {
758	<	LinkedTransferQueue q = new LinkedTransferQueue();
758	>	LinkedTransferQueue<Item> q = new LinkedTransferQueue<Item>();
759		q.transfer(null);
760		shouldThrow();
761		} catch (NullPointerException success) {}
762		}
763
764		/**
765	<	* transfer waits until a poll occurs. The transfered element
766	<	* is returned by this associated poll.
765	>	* transfer waits until a poll occurs. The transferred element
766	>	* is returned by the associated poll.
767		*/
768		public void testTransfer2() throws InterruptedException {
769	<	final LinkedTransferQueue<Integer> q
770	<	= new LinkedTransferQueue<Integer>();
769	>	final LinkedTransferQueue<Item> q = new LinkedTransferQueue<>();
770	>	final CountDownLatch threadStarted = new CountDownLatch(1);
771
772		Thread t = newStartedThread(new CheckedRunnable() {
773	<	void realRun() throws InterruptedException {
774	<	q.transfer(SIZE);
775	<	threadAssertTrue(q.isEmpty());
773	>	public void realRun() throws InterruptedException {
774	>	threadStarted.countDown();
775	>	q.transfer(five);
776	>	checkEmpty(q);
777		}});
778
779	<	Thread.sleep(SHORT_DELAY_MS);
780	<	assertEquals(1, q.size());
781	<	assertEquals(SIZE, (int) q.poll());
782	<	assertTrue(q.isEmpty());
783	<	t.join();
779	>	threadStarted.await();
780	>	Callable<Boolean> oneElement
781	>	= new Callable<Boolean>() { public Boolean call() {
782	>	return !q.isEmpty() && q.size() == 1; }};
783	>	waitForThreadToEnterWaitState(t, oneElement);
784	>
785	>	assertSame(five, q.poll());
786	>	checkEmpty(q);
787	>	awaitTermination(t);
788		}
789
790		/**
791		* transfer waits until a poll occurs, and then transfers in fifo order
792		*/
793		public void testTransfer3() throws InterruptedException {
794	<	final LinkedTransferQueue<Integer> q
902	<	= new LinkedTransferQueue<Integer>();
794	>	final LinkedTransferQueue<Item> q = new LinkedTransferQueue<>();
795
796		Thread first = newStartedThread(new CheckedRunnable() {
797	<	void realRun() throws InterruptedException {
798	<	Integer i = SIZE + 1;
799	<	q.transfer(i);
800	<	threadAssertTrue(!q.contains(i));
909	<	threadAssertEquals(1, q.size());
797	>	public void realRun() throws InterruptedException {
798	>	q.transfer(four);
799	>	mustNotContain(q, four);
800	>	mustEqual(1, q.size());
801		}});
802
803		Thread interruptedThread = newStartedThread(
804		new CheckedInterruptedRunnable() {
805	<	void realRun() throws InterruptedException {
806	<	while (q.size() == 0)
805	>	public void realRun() throws InterruptedException {
806	>	while (q.isEmpty())
807		Thread.yield();
808	<	q.transfer(SIZE);
808	>	q.transfer(five);
809		}});
810
811		while (q.size() < 2)
812		Thread.yield();
813	<	assertEquals(2, q.size());
814	<	assertEquals(SIZE + 1, (int) q.poll());
813	>	mustEqual(2, q.size());
814	>	assertSame(four, q.poll());
815		first.join();
816	<	assertEquals(1, q.size());
816	>	mustEqual(1, q.size());
817		interruptedThread.interrupt();
818		interruptedThread.join();
819	<	assertEquals(0, q.size());
929	<	assertTrue(q.isEmpty());
819	>	checkEmpty(q);
820		}
821
822		/**
#	Line 934 | Line 824 | public class LinkedTransferQueueTest ext
824		* thread returns the element
825		*/
826		public void testTransfer4() throws InterruptedException {
827	<	final LinkedTransferQueue q = new LinkedTransferQueue();
827	>	final LinkedTransferQueue<Item> q = new LinkedTransferQueue<Item>();
828
829		Thread t = newStartedThread(new CheckedRunnable() {
830	<	void realRun() throws InterruptedException {
830	>	public void realRun() throws InterruptedException {
831		q.transfer(four);
832	<	threadAssertFalse(q.contains(four));
833	<	threadAssertEquals(three, q.poll());
832	>	mustNotContain(q, four);
833	>	assertSame(three, q.poll());
834		}});
835
836	<	Thread.sleep(SHORT_DELAY_MS);
836	>	while (q.isEmpty())
837	>	Thread.yield();
838	>	assertFalse(q.isEmpty());
839	>	mustEqual(1, q.size());
840		assertTrue(q.offer(three));
841	<	assertEquals(four, q.poll());
842	<	t.join();
841	>	assertSame(four, q.poll());
842	>	awaitTermination(t);
843		}
844
845		/**
846	<	* transfer waits until a take occurs. The transfered element
847	<	* is returned by this associated take.
846	>	* transfer waits until a take occurs. The transferred element
847	>	* is returned by the associated take.
848		*/
849		public void testTransfer5() throws InterruptedException {
850	<	final LinkedTransferQueue<Integer> q
958	<	= new LinkedTransferQueue<Integer>();
850	>	final LinkedTransferQueue<Item> q = new LinkedTransferQueue<>();
851
852		Thread t = newStartedThread(new CheckedRunnable() {
853	<	void realRun() throws InterruptedException {
854	<	q.transfer(SIZE);
853	>	public void realRun() throws InterruptedException {
854	>	q.transfer(four);
855		checkEmpty(q);
856		}});
857
858	<	Thread.sleep(SHORT_DELAY_MS);
859	<	assertEquals(SIZE, (int) q.take());
858	>	while (q.isEmpty())
859	>	Thread.yield();
860	>	assertFalse(q.isEmpty());
861	>	mustEqual(1, q.size());
862	>	assertSame(four, q.take());
863		checkEmpty(q);
864	<	t.join();
864	>	awaitTermination(t);
865		}
866
867		/**
868		* tryTransfer(null) throws NullPointerException
869		*/
870		public void testTryTransfer1() {
871	+	final LinkedTransferQueue<Item> q = new LinkedTransferQueue<Item>();
872		try {
977	–	final LinkedTransferQueue q = new LinkedTransferQueue();
873		q.tryTransfer(null);
874		shouldThrow();
875		} catch (NullPointerException success) {}
#	Line 985 | Line 880 | public class LinkedTransferQueueTest ext
880		* consumers waiting to poll or take.
881		*/
882		public void testTryTransfer2() throws InterruptedException {
883	<	final LinkedTransferQueue q = new LinkedTransferQueue();
883	>	final LinkedTransferQueue<Object> q = new LinkedTransferQueue<Object>();
884		assertFalse(q.tryTransfer(new Object()));
885		assertFalse(q.hasWaitingConsumer());
886		checkEmpty(q);
#	Line 997 | Line 892 | public class LinkedTransferQueueTest ext
892		*/
893		public void testTryTransfer3() throws InterruptedException {
894		final Object hotPotato = new Object();
895	<	final LinkedTransferQueue q = new LinkedTransferQueue();
895	>	final LinkedTransferQueue<Object> q = new LinkedTransferQueue<Object>();
896
897		Thread t = newStartedThread(new CheckedRunnable() {
898	<	void realRun() {
898	>	public void realRun() {
899		while (! q.hasWaitingConsumer())
900		Thread.yield();
901	<	threadAssertTrue(q.hasWaitingConsumer());
902	<	threadAssertTrue(q.isEmpty());
903	<	threadAssertTrue(q.size() == 0);
1009	<	threadAssertTrue(q.tryTransfer(hotPotato));
901	>	assertTrue(q.hasWaitingConsumer());
902	>	checkEmpty(q);
903	>	assertTrue(q.tryTransfer(hotPotato));
904		}});
905
906	<	assertTrue(q.poll(MEDIUM_DELAY_MS, MILLISECONDS) == hotPotato);
906	>	long startTime = System.nanoTime();
907	>	assertSame(hotPotato, q.poll(LONG_DELAY_MS, MILLISECONDS));
908	>	assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS);
909		checkEmpty(q);
910	<	t.join();
910	>	awaitTermination(t);
911		}
912
913		/**
#	Line 1020 | Line 916 | public class LinkedTransferQueueTest ext
916		*/
917		public void testTryTransfer4() throws InterruptedException {
918		final Object hotPotato = new Object();
919	<	final LinkedTransferQueue q = new LinkedTransferQueue();
919	>	final LinkedTransferQueue<Object> q = new LinkedTransferQueue<Object>();
920
921		Thread t = newStartedThread(new CheckedRunnable() {
922	<	void realRun() {
922	>	public void realRun() {
923		while (! q.hasWaitingConsumer())
924		Thread.yield();
925	<	threadAssertTrue(q.hasWaitingConsumer());
926	<	threadAssertTrue(q.isEmpty());
927	<	threadAssertTrue(q.size() == 0);
1032	<	threadAssertTrue(q.tryTransfer(hotPotato));
925	>	assertTrue(q.hasWaitingConsumer());
926	>	checkEmpty(q);
927	>	assertTrue(q.tryTransfer(hotPotato));
928		}});
929
930	<	assertTrue(q.take() == hotPotato);
930	>	assertSame(q.take(), hotPotato);
931		checkEmpty(q);
932	<	t.join();
932	>	awaitTermination(t);
933		}
934
935		/**
936	<	* tryTransfer waits the amount given if interrupted, and
1042	<	* throws interrupted exception
936	>	* tryTransfer blocks interruptibly if no takers
937		*/
938		public void testTryTransfer5() throws InterruptedException {
939	<	final LinkedTransferQueue q = new LinkedTransferQueue();
939	>	final LinkedTransferQueue<Object> q = new LinkedTransferQueue<Object>();
940	>	final CountDownLatch pleaseInterrupt = new CountDownLatch(1);
941	>	assertTrue(q.isEmpty());
942
943	<	Thread toInterrupt = newStartedThread(new CheckedInterruptedRunnable() {
944	<	void realRun() throws InterruptedException {
945	<	q.tryTransfer(new Object(), LONG_DELAY_MS, MILLISECONDS);
943	>	Thread t = newStartedThread(new CheckedRunnable() {
944	>	public void realRun() throws InterruptedException {
945	>	Thread.currentThread().interrupt();
946	>	try {
947	>	q.tryTransfer(new Object(), randomTimeout(), randomTimeUnit());
948	>	shouldThrow();
949	>	} catch (InterruptedException success) {}
950	>	assertFalse(Thread.interrupted());
951	>
952	>	pleaseInterrupt.countDown();
953	>	try {
954	>	q.tryTransfer(new Object(), LONGER_DELAY_MS, MILLISECONDS);
955	>	shouldThrow();
956	>	} catch (InterruptedException success) {}
957	>	assertFalse(Thread.interrupted());
958		}});
959
960	<	Thread.sleep(SMALL_DELAY_MS);
961	<	toInterrupt.interrupt();
962	<	toInterrupt.join();
960	>	await(pleaseInterrupt);
961	>	if (randomBoolean()) assertThreadBlocks(t, Thread.State.TIMED_WAITING);
962	>	t.interrupt();
963	>	awaitTermination(t);
964	>	checkEmpty(q);
965		}
966
967		/**
968	<	* tryTransfer gives up after the timeout and return false
968	>	* tryTransfer gives up after the timeout and returns false
969		*/
970		public void testTryTransfer6() throws InterruptedException {
971	<	final LinkedTransferQueue q = new LinkedTransferQueue();
971	>	final LinkedTransferQueue<Object> q = new LinkedTransferQueue<Object>();
972
973		Thread t = newStartedThread(new CheckedRunnable() {
974	<	void realRun() throws InterruptedException {
975	<	threadAssertFalse
976	<	(q.tryTransfer(new Object(),
977	<	SHORT_DELAY_MS, MILLISECONDS));
974	>	public void realRun() throws InterruptedException {
975	>	long startTime = System.nanoTime();
976	>	assertFalse(q.tryTransfer(new Object(),
977	>	timeoutMillis(), MILLISECONDS));
978	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
979	>	checkEmpty(q);
980		}});
981
982	<	Thread.sleep(SMALL_DELAY_MS);
982	>	awaitTermination(t);
983		checkEmpty(q);
1072	–	t.join();
984		}
985
986		/**
#	Line 1077 | Line 988 | public class LinkedTransferQueueTest ext
988		* before transfering to a poll or take
989		*/
990		public void testTryTransfer7() throws InterruptedException {
991	<	final LinkedTransferQueue q = new LinkedTransferQueue();
991	>	final LinkedTransferQueue<Item> q = new LinkedTransferQueue<Item>();
992		assertTrue(q.offer(four));
993
994		Thread t = newStartedThread(new CheckedRunnable() {
995	<	void realRun() throws InterruptedException {
996	<	threadAssertTrue(q.tryTransfer(five,
997	<	MEDIUM_DELAY_MS, MILLISECONDS));
998	<	threadAssertTrue(q.isEmpty());
995	>	public void realRun() throws InterruptedException {
996	>	long startTime = System.nanoTime();
997	>	assertTrue(q.tryTransfer(five, LONG_DELAY_MS, MILLISECONDS));
998	>	assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS);
999	>	checkEmpty(q);
1000		}});
1001
1002	<	Thread.sleep(SHORT_DELAY_MS);
1003	<	assertEquals(2, q.size());
1004	<	assertEquals(four, q.poll());
1005	<	assertEquals(five, q.poll());
1002	>	while (q.size() != 2)
1003	>	Thread.yield();
1004	>	mustEqual(2, q.size());
1005	>	assertSame(four, q.poll());
1006	>	assertSame(five, q.poll());
1007		checkEmpty(q);
1008	<	t.join();
1008	>	awaitTermination(t);
1009		}
1010
1011		/**
1012	<	* tryTransfer attempts to enqueue into the q and fails returning
1013	<	* false not enqueueing and the successive poll is null
1012	>	* tryTransfer attempts to enqueue into the queue and fails
1013	>	* returning false not enqueueing and the successive poll is null
1014		*/
1015		public void testTryTransfer8() throws InterruptedException {
1016	<	final LinkedTransferQueue q = new LinkedTransferQueue();
1016	>	final LinkedTransferQueue<Item> q = new LinkedTransferQueue<Item>();
1017		assertTrue(q.offer(four));
1018	<	assertEquals(1, q.size());
1019	<	assertFalse(q.tryTransfer(five, SHORT_DELAY_MS, MILLISECONDS));
1020	<	assertEquals(1, q.size());
1021	<	assertEquals(four, q.poll());
1018	>	mustEqual(1, q.size());
1019	>	long startTime = System.nanoTime();
1020	>	assertFalse(q.tryTransfer(five, timeoutMillis(), MILLISECONDS));
1021	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
1022	>	mustEqual(1, q.size());
1023	>	assertSame(four, q.poll());
1024		assertNull(q.poll());
1025		checkEmpty(q);
1026		}
1027
1028	<	private LinkedTransferQueue<Integer> populatedQueue(int n) {
1029	<	LinkedTransferQueue<Integer> q = new LinkedTransferQueue<Integer>();
1030	<	assertTrue(q.isEmpty());
1028	>	private LinkedTransferQueue<Item> populatedQueue(int n) {
1029	>	LinkedTransferQueue<Item> q = new LinkedTransferQueue<>();
1030	>	checkEmpty(q);
1031		for (int i = 0; i < n; i++) {
1032	<	assertEquals(i, q.size());
1033	<	assertTrue(q.offer(i));
1034	<	assertEquals(Integer.MAX_VALUE, q.remainingCapacity());
1032	>	mustEqual(i, q.size());
1033	>	mustOffer(q, i);
1034	>	mustEqual(Integer.MAX_VALUE, q.remainingCapacity());
1035		}
1036		assertFalse(q.isEmpty());
1037		return q;
1038		}
1039	+
1040	+	/**
1041	+	* remove(null), contains(null) always return false
1042	+	*/
1043	+	public void testNeverContainsNull() {
1044	+	Collection<?>[] qs = {
1045	+	new LinkedTransferQueue<Object>(),
1046	+	populatedQueue(2),
1047	+	};
1048	+
1049	+	for (Collection<?> q : qs) {
1050	+	assertFalse(q.contains(null));
1051	+	assertFalse(q.remove(null));
1052	+	}
1053	+	}
1054		}

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