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Comparing jsr166/src/test/tck/ConcurrentLinkedQueueTest.java (file contents):
Revision 1.11 by jsr166, Tue Nov 17 12:16:30 2009 UTC vs.
Revision 1.42 by jsr166, Sun Oct 16 20:44:18 2016 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 Andrew Wright, Jeffrey Hayes,
6		* Pat Fisher, Mike Judd.
7		*/
8
9	<	import junit.framework.*;
10	<	import java.util.*;
11	<	import java.util.concurrent.*;
12	<	import java.io.*;
9	>	import java.util.Arrays;
10	>	import java.util.Collection;
11	>	import java.util.Iterator;
12	>	import java.util.NoSuchElementException;
13	>	import java.util.Queue;
14	>	import java.util.concurrent.ConcurrentLinkedQueue;
15	>
16	>	import junit.framework.Test;
17	>	import junit.framework.TestSuite;
18
19		public class ConcurrentLinkedQueueTest extends JSR166TestCase {
20
21		public static void main(String[] args) {
22	<	junit.textui.TestRunner.run (suite());
22	>	main(suite(), args);
23		}
24
25		public static Test suite() {
26	<	return new TestSuite(ConcurrentLinkedQueueTest.class);
26	>	class Implementation implements CollectionImplementation {
27	>	public Class<?> klazz() { return ConcurrentLinkedQueue.class; }
28	>	public Collection emptyCollection() { return new ConcurrentLinkedQueue(); }
29	>	public Object makeElement(int i) { return i; }
30	>	public boolean isConcurrent() { return true; }
31	>	public boolean permitsNulls() { return false; }
32	>	}
33	>	return newTestSuite(ConcurrentLinkedQueueTest.class,
34	>	CollectionTest.testSuite(new Implementation()));
35		}
36
37		/**
38	<	* Create a queue of given size containing consecutive
39	<	* Integers 0 ... n.
38	>	* Returns a new queue of given size containing consecutive
39	>	* Integers 0 ... n - 1.
40		*/
41	<	private ConcurrentLinkedQueue populatedQueue(int n) {
42	<	ConcurrentLinkedQueue q = new ConcurrentLinkedQueue();
41	>	private ConcurrentLinkedQueue<Integer> populatedQueue(int n) {
42	>	ConcurrentLinkedQueue<Integer> q = new ConcurrentLinkedQueue<Integer>();
43		assertTrue(q.isEmpty());
44	<	for (int i = 0; i < n; ++i)
45	<	assertTrue(q.offer(new Integer(i)));
44	>	for (int i = 0; i < n; ++i)
45	>	assertTrue(q.offer(new Integer(i)));
46		assertFalse(q.isEmpty());
47	<	assertEquals(n, q.size());
47	>	assertEquals(n, q.size());
48	>	assertEquals((Integer) 0, q.peek());
49		return q;
50		}
51
#	Line 43 | Line 57 | public class ConcurrentLinkedQueueTest e
57		}
58
59		/**
60	<	*  Initializing from null Collection throws NPE
60	>	* Initializing from null Collection throws NPE
61		*/
62		public void testConstructor3() {
63		try {
64	<	ConcurrentLinkedQueue q = new ConcurrentLinkedQueue((Collection)null);
64	>	new ConcurrentLinkedQueue((Collection)null);
65		shouldThrow();
66	<	}
53	<	catch (NullPointerException success) {}
66	>	} catch (NullPointerException success) {}
67		}
68
69		/**
#	Line 58 | Line 71 | public class ConcurrentLinkedQueueTest e
71		*/
72		public void testConstructor4() {
73		try {
74	<	Integer[] ints = new Integer[SIZE];
62	<	ConcurrentLinkedQueue q = new ConcurrentLinkedQueue(Arrays.asList(ints));
74	>	new ConcurrentLinkedQueue(Arrays.asList(new Integer[SIZE]));
75		shouldThrow();
76	<	}
65	<	catch (NullPointerException success) {}
76	>	} catch (NullPointerException success) {}
77		}
78
79		/**
80		* Initializing from Collection with some null elements throws NPE
81		*/
82		public void testConstructor5() {
83	+	Integer[] ints = new Integer[SIZE];
84	+	for (int i = 0; i < SIZE - 1; ++i)
85	+	ints[i] = new Integer(i);
86		try {
87	<	Integer[] ints = new Integer[SIZE];
74	<	for (int i = 0; i < SIZE-1; ++i)
75	<	ints[i] = new Integer(i);
76	<	ConcurrentLinkedQueue q = new ConcurrentLinkedQueue(Arrays.asList(ints));
87	>	new ConcurrentLinkedQueue(Arrays.asList(ints));
88		shouldThrow();
89	<	}
79	<	catch (NullPointerException success) {}
89	>	} catch (NullPointerException success) {}
90		}
91
92		/**
93		* Queue contains all elements of collection used to initialize
94		*/
95		public void testConstructor6() {
96	<	try {
97	<	Integer[] ints = new Integer[SIZE];
98	<	for (int i = 0; i < SIZE; ++i)
99	<	ints[i] = new Integer(i);
100	<	ConcurrentLinkedQueue q = new ConcurrentLinkedQueue(Arrays.asList(ints));
101	<	for (int i = 0; i < SIZE; ++i)
92	<	assertEquals(ints[i], q.poll());
93	<	}
94	<	finally {}
96	>	Integer[] ints = new Integer[SIZE];
97	>	for (int i = 0; i < SIZE; ++i)
98	>	ints[i] = new Integer(i);
99	>	ConcurrentLinkedQueue q = new ConcurrentLinkedQueue(Arrays.asList(ints));
100	>	for (int i = 0; i < SIZE; ++i)
101	>	assertEquals(ints[i], q.poll());
102		}
103
104		/**
#	Line 114 | Line 121 | public class ConcurrentLinkedQueueTest e
121		public void testSize() {
122		ConcurrentLinkedQueue q = populatedQueue(SIZE);
123		for (int i = 0; i < SIZE; ++i) {
124	<	assertEquals(SIZE-i, q.size());
124	>	assertEquals(SIZE - i, q.size());
125		q.remove();
126		}
127		for (int i = 0; i < SIZE; ++i) {
#	Line 127 | Line 134 | public class ConcurrentLinkedQueueTest e
134		* offer(null) throws NPE
135		*/
136		public void testOfferNull() {
137	<	try {
138	<	ConcurrentLinkedQueue q = new ConcurrentLinkedQueue();
137	>	ConcurrentLinkedQueue q = new ConcurrentLinkedQueue();
138	>	try {
139		q.offer(null);
140		shouldThrow();
141	<	} catch (NullPointerException success) { }
141	>	} catch (NullPointerException success) {}
142		}
143
144		/**
145		* add(null) throws NPE
146		*/
147		public void testAddNull() {
148	<	try {
149	<	ConcurrentLinkedQueue q = new ConcurrentLinkedQueue();
148	>	ConcurrentLinkedQueue q = new ConcurrentLinkedQueue();
149	>	try {
150		q.add(null);
151		shouldThrow();
152	<	} catch (NullPointerException success) { }
152	>	} catch (NullPointerException success) {}
153		}
154
148	–
155		/**
156		* Offer returns true
157		*/
#	Line 170 | Line 176 | public class ConcurrentLinkedQueueTest e
176		* addAll(null) throws NPE
177		*/
178		public void testAddAll1() {
179	+	ConcurrentLinkedQueue q = new ConcurrentLinkedQueue();
180		try {
174	–	ConcurrentLinkedQueue q = new ConcurrentLinkedQueue();
181		q.addAll(null);
182		shouldThrow();
183	<	}
178	<	catch (NullPointerException success) {}
183	>	} catch (NullPointerException success) {}
184		}
185
186		/**
187		* addAll(this) throws IAE
188		*/
189		public void testAddAllSelf() {
190	+	ConcurrentLinkedQueue q = populatedQueue(SIZE);
191		try {
186	–	ConcurrentLinkedQueue q = populatedQueue(SIZE);
192		q.addAll(q);
193		shouldThrow();
194	<	}
190	<	catch (IllegalArgumentException success) {}
194	>	} catch (IllegalArgumentException success) {}
195		}
196
197		/**
198		* addAll of a collection with null elements throws NPE
199		*/
200		public void testAddAll2() {
201	+	ConcurrentLinkedQueue q = new ConcurrentLinkedQueue();
202		try {
203	<	ConcurrentLinkedQueue q = new ConcurrentLinkedQueue();
199	<	Integer[] ints = new Integer[SIZE];
200	<	q.addAll(Arrays.asList(ints));
203	>	q.addAll(Arrays.asList(new Integer[SIZE]));
204		shouldThrow();
205	<	}
203	<	catch (NullPointerException success) {}
205	>	} catch (NullPointerException success) {}
206		}
207	+
208		/**
209	<	*  addAll of a collection with any null elements throws NPE after
209	>	* addAll of a collection with any null elements throws NPE after
210		* possibly adding some elements
211		*/
212		public void testAddAll3() {
213	+	ConcurrentLinkedQueue q = new ConcurrentLinkedQueue();
214	+	Integer[] ints = new Integer[SIZE];
215	+	for (int i = 0; i < SIZE - 1; ++i)
216	+	ints[i] = new Integer(i);
217		try {
211	–	ConcurrentLinkedQueue q = new ConcurrentLinkedQueue();
212	–	Integer[] ints = new Integer[SIZE];
213	–	for (int i = 0; i < SIZE-1; ++i)
214	–	ints[i] = new Integer(i);
218		q.addAll(Arrays.asList(ints));
219		shouldThrow();
220	<	}
218	<	catch (NullPointerException success) {}
220	>	} catch (NullPointerException success) {}
221		}
222
223		/**
224		* Queue contains all elements, in traversal order, of successful addAll
225		*/
226		public void testAddAll5() {
227	<	try {
228	<	Integer[] empty = new Integer[0];
229	<	Integer[] ints = new Integer[SIZE];
230	<	for (int i = 0; i < SIZE; ++i)
231	<	ints[i] = new Integer(i);
232	<	ConcurrentLinkedQueue q = new ConcurrentLinkedQueue();
233	<	assertFalse(q.addAll(Arrays.asList(empty)));
234	<	assertTrue(q.addAll(Arrays.asList(ints)));
235	<	for (int i = 0; i < SIZE; ++i)
234	<	assertEquals(ints[i], q.poll());
235	<	}
236	<	finally {}
227	>	Integer[] empty = new Integer[0];
228	>	Integer[] ints = new Integer[SIZE];
229	>	for (int i = 0; i < SIZE; ++i)
230	>	ints[i] = new Integer(i);
231	>	ConcurrentLinkedQueue q = new ConcurrentLinkedQueue();
232	>	assertFalse(q.addAll(Arrays.asList(empty)));
233	>	assertTrue(q.addAll(Arrays.asList(ints)));
234	>	for (int i = 0; i < SIZE; ++i)
235	>	assertEquals(ints[i], q.poll());
236		}
237
238		/**
#	Line 242 | Line 241 | public class ConcurrentLinkedQueueTest e
241		public void testPoll() {
242		ConcurrentLinkedQueue q = populatedQueue(SIZE);
243		for (int i = 0; i < SIZE; ++i) {
244	<	assertEquals(i, ((Integer)q.poll()).intValue());
244	>	assertEquals(i, q.poll());
245		}
246	<	assertNull(q.poll());
246	>	assertNull(q.poll());
247		}
248
249		/**
#	Line 253 | Line 252 | public class ConcurrentLinkedQueueTest e
252		public void testPeek() {
253		ConcurrentLinkedQueue q = populatedQueue(SIZE);
254		for (int i = 0; i < SIZE; ++i) {
255	<	assertEquals(i, ((Integer)q.peek()).intValue());
256	<	q.poll();
255	>	assertEquals(i, q.peek());
256	>	assertEquals(i, q.poll());
257		assertTrue(q.peek() == null ||
258	<	i != ((Integer)q.peek()).intValue());
258	>	!q.peek().equals(i));
259		}
260	<	assertNull(q.peek());
260	>	assertNull(q.peek());
261		}
262
263		/**
#	Line 267 | Line 266 | public class ConcurrentLinkedQueueTest e
266		public void testElement() {
267		ConcurrentLinkedQueue q = populatedQueue(SIZE);
268		for (int i = 0; i < SIZE; ++i) {
269	<	assertEquals(i, ((Integer)q.element()).intValue());
270	<	q.poll();
269	>	assertEquals(i, q.element());
270	>	assertEquals(i, q.poll());
271		}
272		try {
273		q.element();
274		shouldThrow();
275	<	}
277	<	catch (NoSuchElementException success) {}
275	>	} catch (NoSuchElementException success) {}
276		}
277
278		/**
279	<	*  remove removes next element, or throws NSEE if empty
279	>	* remove removes next element, or throws NSEE if empty
280		*/
281		public void testRemove() {
282		ConcurrentLinkedQueue q = populatedQueue(SIZE);
283		for (int i = 0; i < SIZE; ++i) {
284	<	assertEquals(i, ((Integer)q.remove()).intValue());
284	>	assertEquals(i, q.remove());
285		}
286		try {
287		q.remove();
288		shouldThrow();
289	<	} catch (NoSuchElementException success) {
292	<	}
289	>	} catch (NoSuchElementException success) {}
290		}
291
292		/**
#	Line 297 | Line 294 | public class ConcurrentLinkedQueueTest e
294		*/
295		public void testRemoveElement() {
296		ConcurrentLinkedQueue q = populatedQueue(SIZE);
297	<	for (int i = 1; i < SIZE; i+=2) {
298	<	assertTrue(q.remove(new Integer(i)));
299	<	}
300	<	for (int i = 0; i < SIZE; i+=2) {
301	<	assertTrue(q.remove(new Integer(i)));
302	<	assertFalse(q.remove(new Integer(i+1)));
297	>	for (int i = 1; i < SIZE; i += 2) {
298	>	assertTrue(q.contains(i));
299	>	assertTrue(q.remove(i));
300	>	assertFalse(q.contains(i));
301	>	assertTrue(q.contains(i - 1));
302	>	}
303	>	for (int i = 0; i < SIZE; i += 2) {
304	>	assertTrue(q.contains(i));
305	>	assertTrue(q.remove(i));
306	>	assertFalse(q.contains(i));
307	>	assertFalse(q.remove(i + 1));
308	>	assertFalse(q.contains(i + 1));
309		}
310		assertTrue(q.isEmpty());
311		}
#	Line 361 | Line 364 | public class ConcurrentLinkedQueueTest e
364		assertTrue(changed);
365
366		assertTrue(q.containsAll(p));
367	<	assertEquals(SIZE-i, q.size());
367	>	assertEquals(SIZE - i, q.size());
368		p.remove();
369		}
370		}
#	Line 374 | Line 377 | public class ConcurrentLinkedQueueTest e
377		ConcurrentLinkedQueue q = populatedQueue(SIZE);
378		ConcurrentLinkedQueue p = populatedQueue(i);
379		assertTrue(q.removeAll(p));
380	<	assertEquals(SIZE-i, q.size());
380	>	assertEquals(SIZE - i, q.size());
381		for (int j = 0; j < i; ++j) {
382	<	Integer I = (Integer)(p.remove());
383	<	assertFalse(q.contains(I));
382	>	Integer x = (Integer)(p.remove());
383	>	assertFalse(q.contains(x));
384		}
385		}
386		}
387
388		/**
389	<	* toArray contains all elements
389	>	* toArray contains all elements in FIFO order
390		*/
391		public void testToArray() {
392		ConcurrentLinkedQueue q = populatedQueue(SIZE);
393	<	Object[] o = q.toArray();
394	<	Arrays.sort(o);
395	<	for (int i = 0; i < o.length; i++)
393	<	assertEquals(o[i], q.poll());
393	>	Object[] o = q.toArray();
394	>	for (int i = 0; i < o.length; i++)
395	>	assertSame(o[i], q.poll());
396		}
397
398		/**
399	<	*  toArray(a) contains all elements
399	>	* toArray(a) contains all elements in FIFO order
400		*/
401		public void testToArray2() {
402	<	ConcurrentLinkedQueue q = populatedQueue(SIZE);
403	<	Integer[] ints = new Integer[SIZE];
404	<	ints = (Integer[])q.toArray(ints);
405	<	Arrays.sort(ints);
402	>	ConcurrentLinkedQueue<Integer> q = populatedQueue(SIZE);
403	>	Integer[] ints = new Integer[SIZE];
404	>	Integer[] array = q.toArray(ints);
405	>	assertSame(ints, array);
406		for (int i = 0; i < ints.length; i++)
407	<	assertEquals(ints[i], q.poll());
407	>	assertSame(ints[i], q.poll());
408		}
409
410		/**
411	<	* toArray(null) throws NPE
411	>	* toArray(null) throws NullPointerException
412		*/
413	<	public void testToArray_BadArg() {
414	<	try {
415	<	ConcurrentLinkedQueue q = populatedQueue(SIZE);
416	<	Object o[] = q.toArray(null);
417	<	shouldThrow();
418	<	} catch (NullPointerException success) {}
413	>	public void testToArray_NullArg() {
414	>	ConcurrentLinkedQueue q = populatedQueue(SIZE);
415	>	try {
416	>	q.toArray(null);
417	>	shouldThrow();
418	>	} catch (NullPointerException success) {}
419		}
420
421		/**
422	<	* toArray with incompatible array type throws ArrayStoreException
422	>	* toArray(incompatible array type) throws ArrayStoreException
423		*/
424		public void testToArray1_BadArg() {
425	<	try {
426	<	ConcurrentLinkedQueue q = populatedQueue(SIZE);
427	<	Object o[] = q.toArray(new String[10] );
428	<	shouldThrow();
429	<	} catch (ArrayStoreException success) {}
425	>	ConcurrentLinkedQueue q = populatedQueue(SIZE);
426	>	try {
427	>	q.toArray(new String[10]);
428	>	shouldThrow();
429	>	} catch (ArrayStoreException success) {}
430		}
431
432		/**
433	<	*  iterator iterates through all elements
433	>	* iterator iterates through all elements
434		*/
435		public void testIterator() {
436		ConcurrentLinkedQueue q = populatedQueue(SIZE);
437	<	int i = 0;
438	<	Iterator it = q.iterator();
439	<	while (it.hasNext()) {
437	>	Iterator it = q.iterator();
438	>	int i;
439	>	for (i = 0; it.hasNext(); i++)
440		assertTrue(q.contains(it.next()));
439	–	++i;
440	–	}
441		assertEquals(i, SIZE);
442	+	assertIteratorExhausted(it);
443	+	}
444	+
445	+	/**
446	+	* iterator of empty collection has no elements
447	+	*/
448	+	public void testEmptyIterator() {
449	+	assertIteratorExhausted(new ConcurrentLinkedQueue().iterator());
450		}
451
452		/**
#	Line 452 | Line 460 | public class ConcurrentLinkedQueueTest e
460
461		int k = 0;
462		for (Iterator it = q.iterator(); it.hasNext();) {
463	<	int i = ((Integer)(it.next())).intValue();
456	<	assertEquals(++k, i);
463	>	assertEquals(++k, it.next());
464		}
465
466		assertEquals(3, k);
#	Line 462 | Line 469 | public class ConcurrentLinkedQueueTest e
469		/**
470		* Modifications do not cause iterators to fail
471		*/
472	<	public void testWeaklyConsistentIteration () {
472	>	public void testWeaklyConsistentIteration() {
473		final ConcurrentLinkedQueue q = new ConcurrentLinkedQueue();
474		q.add(one);
475		q.add(two);
476		q.add(three);
477
478	<	try {
479	<	for (Iterator it = q.iterator(); it.hasNext();) {
480	<	q.remove();
474	<	it.next();
475	<	}
476	<	}
477	<	catch (ConcurrentModificationException e) {
478	<	shouldThrow();
478	>	for (Iterator it = q.iterator(); it.hasNext();) {
479	>	q.remove();
480	>	it.next();
481		}
482
483		assertEquals("queue should be empty again", 0, q.size());
#	Line 484 | Line 486 | public class ConcurrentLinkedQueueTest e
486		/**
487		* iterator.remove removes current element
488		*/
489	<	public void testIteratorRemove () {
489	>	public void testIteratorRemove() {
490		final ConcurrentLinkedQueue q = new ConcurrentLinkedQueue();
491		q.add(one);
492		q.add(two);
#	Line 493 | Line 495 | public class ConcurrentLinkedQueueTest e
495		it.next();
496		it.remove();
497		it = q.iterator();
498	<	assertEquals(it.next(), two);
499	<	assertEquals(it.next(), three);
498	>	assertSame(it.next(), two);
499	>	assertSame(it.next(), three);
500		assertFalse(it.hasNext());
501		}
502
501	–
503		/**
504		* toString contains toStrings of elements
505		*/
#	Line 506 | Line 507 | public class ConcurrentLinkedQueueTest e
507		ConcurrentLinkedQueue q = populatedQueue(SIZE);
508		String s = q.toString();
509		for (int i = 0; i < SIZE; ++i) {
510	<	assertTrue(s.indexOf(String.valueOf(i)) >= 0);
510	>	assertTrue(s.contains(String.valueOf(i)));
511		}
512		}
513
514		/**
515		* A deserialized serialized queue has same elements in same order
516		*/
517	<	public void testSerialization() {
518	<	ConcurrentLinkedQueue q = populatedQueue(SIZE);
519	<	try {
520	<	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
521	<	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
522	<	out.writeObject(q);
523	<	out.close();
524	<
525	<	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
526	<	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
527	<	ConcurrentLinkedQueue r = (ConcurrentLinkedQueue)in.readObject();
527	<	assertEquals(q.size(), r.size());
528	<	while (!q.isEmpty())
529	<	assertEquals(q.remove(), r.remove());
530	<	} catch (Exception e) {
531	<	unexpectedException();
517	>	public void testSerialization() throws Exception {
518	>	Queue x = populatedQueue(SIZE);
519	>	Queue y = serialClone(x);
520	>
521	>	assertNotSame(x, y);
522	>	assertEquals(x.size(), y.size());
523	>	assertEquals(x.toString(), y.toString());
524	>	assertTrue(Arrays.equals(x.toArray(), y.toArray()));
525	>	while (!x.isEmpty()) {
526	>	assertFalse(y.isEmpty());
527	>	assertEquals(x.remove(), y.remove());
528		}
529	+	assertTrue(y.isEmpty());
530		}
531
532	+	/**
533	+	* remove(null), contains(null) always return false
534	+	*/
535	+	public void testNeverContainsNull() {
536	+	Collection<?>[] qs = {
537	+	new ConcurrentLinkedQueue<Object>(),
538	+	populatedQueue(2),
539	+	};
540	+
541	+	for (Collection<?> q : qs) {
542	+	assertFalse(q.contains(null));
543	+	assertFalse(q.remove(null));
544	+	}
545	+	}
546		}

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