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

Comparing jsr166/src/test/tck/ConcurrentLinkedQueueTest.java (file contents):
Revision 1.4 by dl, Sat Sep 20 18:20:07 2003 UTC vs.
Revision 1.19 by jsr166, Sat Oct 9 19:30:34 2010 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/licenses/publicdomain
5	>	* Other contributors include Andrew Wright, Jeffrey Hayes,
6	>	* Pat Fisher, Mike Judd.
7		*/
8
9		import junit.framework.*;
#	Line 13 | Line 14 | import java.io.*;
14		public class ConcurrentLinkedQueueTest extends JSR166TestCase {
15
16		public static void main(String[] args) {
17	<	junit.textui.TestRunner.run (suite());
17	>	junit.textui.TestRunner.run(suite());
18		}
19
20		public static Test suite() {
21	<	return new TestSuite(ConcurrentLinkedQueueTest.class);
21	>	return new TestSuite(ConcurrentLinkedQueueTest.class);
22		}
23
24		/**
#	Line 27 | Line 28 | public class ConcurrentLinkedQueueTest e
28		private ConcurrentLinkedQueue populatedQueue(int n) {
29		ConcurrentLinkedQueue q = new ConcurrentLinkedQueue();
30		assertTrue(q.isEmpty());
31	<	for(int i = 0; i < n; ++i)
32	<	assertTrue(q.offer(new Integer(i)));
31	>	for (int i = 0; i < n; ++i)
32	>	assertTrue(q.offer(new Integer(i)));
33		assertFalse(q.isEmpty());
34	<	assertEquals(n, q.size());
34	>	assertEquals(n, q.size());
35		return q;
36		}
37	<
37	>
38		/**
39	<	*
39	>	* new queue is empty
40		*/
41		public void testConstructor1() {
42		assertEquals(0, new ConcurrentLinkedQueue().size());
43		}
44
45		/**
46	<	*
46	>	* Initializing from null Collection throws NPE
47		*/
48		public void testConstructor3() {
49		try {
50		ConcurrentLinkedQueue q = new ConcurrentLinkedQueue((Collection)null);
51		shouldThrow();
52	<	}
52	<	catch (NullPointerException success) {}
52	>	} catch (NullPointerException success) {}
53		}
54
55		/**
56	<	*
56	>	* Initializing from Collection of null elements throws NPE
57		*/
58		public void testConstructor4() {
59		try {
60		Integer[] ints = new Integer[SIZE];
61		ConcurrentLinkedQueue q = new ConcurrentLinkedQueue(Arrays.asList(ints));
62		shouldThrow();
63	<	}
64	<	catch (NullPointerException success) {}
63	>	} catch (NullPointerException success) {}
64		}
65
66		/**
67	<	*
67	>	* Initializing from Collection with some null elements throws NPE
68		*/
69		public void testConstructor5() {
70		try {
#	Line 74 | Line 73 | public class ConcurrentLinkedQueueTest e
73		ints[i] = new Integer(i);
74		ConcurrentLinkedQueue q = new ConcurrentLinkedQueue(Arrays.asList(ints));
75		shouldThrow();
76	<	}
78	<	catch (NullPointerException success) {}
76	>	} catch (NullPointerException success) {}
77		}
78
79		/**
80	<	*
80	>	* Queue contains all elements of collection used to initialize
81		*/
82		public void testConstructor6() {
83	<	try {
84	<	Integer[] ints = new Integer[SIZE];
85	<	for (int i = 0; i < SIZE; ++i)
86	<	ints[i] = new Integer(i);
87	<	ConcurrentLinkedQueue q = new ConcurrentLinkedQueue(Arrays.asList(ints));
88	<	for (int i = 0; i < SIZE; ++i)
91	<	assertEquals(ints[i], q.poll());
92	<	}
93	<	finally {}
83	>	Integer[] ints = new Integer[SIZE];
84	>	for (int i = 0; i < SIZE; ++i)
85	>	ints[i] = new Integer(i);
86	>	ConcurrentLinkedQueue q = new ConcurrentLinkedQueue(Arrays.asList(ints));
87	>	for (int i = 0; i < SIZE; ++i)
88	>	assertEquals(ints[i], q.poll());
89		}
90
91		/**
92	<	*
92	>	* isEmpty is true before add, false after
93		*/
94		public void testEmpty() {
95		ConcurrentLinkedQueue q = new ConcurrentLinkedQueue();
#	Line 108 | Line 103 | public class ConcurrentLinkedQueueTest e
103		}
104
105		/**
106	<	*
106	>	* size changes when elements added and removed
107		*/
108		public void testSize() {
109		ConcurrentLinkedQueue q = populatedQueue(SIZE);
#	Line 123 | Line 118 | public class ConcurrentLinkedQueueTest e
118		}
119
120		/**
121	<	*
121	>	* offer(null) throws NPE
122		*/
123		public void testOfferNull() {
124	<	try {
124	>	try {
125		ConcurrentLinkedQueue q = new ConcurrentLinkedQueue();
126		q.offer(null);
127		shouldThrow();
128	<	} catch (NullPointerException success) { }
128	>	} catch (NullPointerException success) {}
129	>	}
130	>
131	>	/**
132	>	* add(null) throws NPE
133	>	*/
134	>	public void testAddNull() {
135	>	try {
136	>	ConcurrentLinkedQueue q = new ConcurrentLinkedQueue();
137	>	q.add(null);
138	>	shouldThrow();
139	>	} catch (NullPointerException success) {}
140		}
141
142	+
143		/**
144	<	*
144	>	* Offer returns true
145		*/
146		public void testOffer() {
147		ConcurrentLinkedQueue q = new ConcurrentLinkedQueue();
#	Line 143 | Line 150 | public class ConcurrentLinkedQueueTest e
150		}
151
152		/**
153	<	*
153	>	* add returns true
154		*/
155		public void testAdd() {
156		ConcurrentLinkedQueue q = new ConcurrentLinkedQueue();
#	Line 154 | Line 161 | public class ConcurrentLinkedQueueTest e
161		}
162
163		/**
164	<	*
164	>	* addAll(null) throws NPE
165		*/
166		public void testAddAll1() {
167		try {
168		ConcurrentLinkedQueue q = new ConcurrentLinkedQueue();
169		q.addAll(null);
170		shouldThrow();
171	<	}
165	<	catch (NullPointerException success) {}
171	>	} catch (NullPointerException success) {}
172		}
173	+
174		/**
175	<	*
175	>	* addAll(this) throws IAE
176	>	*/
177	>	public void testAddAllSelf() {
178	>	try {
179	>	ConcurrentLinkedQueue q = populatedQueue(SIZE);
180	>	q.addAll(q);
181	>	shouldThrow();
182	>	} catch (IllegalArgumentException success) {}
183	>	}
184	>
185	>	/**
186	>	* addAll of a collection with null elements throws NPE
187		*/
188		public void testAddAll2() {
189		try {
#	Line 173 | Line 191 | public class ConcurrentLinkedQueueTest e
191		Integer[] ints = new Integer[SIZE];
192		q.addAll(Arrays.asList(ints));
193		shouldThrow();
194	<	}
177	<	catch (NullPointerException success) {}
194	>	} catch (NullPointerException success) {}
195		}
196	+
197		/**
198	<	*
198	>	* addAll of a collection with any null elements throws NPE after
199	>	* possibly adding some elements
200		*/
201		public void testAddAll3() {
202		try {
#	Line 187 | Line 206 | public class ConcurrentLinkedQueueTest e
206		ints[i] = new Integer(i);
207		q.addAll(Arrays.asList(ints));
208		shouldThrow();
209	<	}
191	<	catch (NullPointerException success) {}
209	>	} catch (NullPointerException success) {}
210		}
211
212		/**
213	<	*
213	>	* Queue contains all elements, in traversal order, of successful addAll
214		*/
215		public void testAddAll5() {
216	<	try {
217	<	Integer[] empty = new Integer[0];
218	<	Integer[] ints = new Integer[SIZE];
219	<	for (int i = 0; i < SIZE; ++i)
220	<	ints[i] = new Integer(i);
221	<	ConcurrentLinkedQueue q = new ConcurrentLinkedQueue();
222	<	assertFalse(q.addAll(Arrays.asList(empty)));
223	<	assertTrue(q.addAll(Arrays.asList(ints)));
224	<	for (int i = 0; i < SIZE; ++i)
207	<	assertEquals(ints[i], q.poll());
208	<	}
209	<	finally {}
216	>	Integer[] empty = new Integer[0];
217	>	Integer[] ints = new Integer[SIZE];
218	>	for (int i = 0; i < SIZE; ++i)
219	>	ints[i] = new Integer(i);
220	>	ConcurrentLinkedQueue q = new ConcurrentLinkedQueue();
221	>	assertFalse(q.addAll(Arrays.asList(empty)));
222	>	assertTrue(q.addAll(Arrays.asList(ints)));
223	>	for (int i = 0; i < SIZE; ++i)
224	>	assertEquals(ints[i], q.poll());
225		}
226
227		/**
228	<	*
228	>	* poll succeeds unless empty
229		*/
230		public void testPoll() {
231		ConcurrentLinkedQueue q = populatedQueue(SIZE);
232		for (int i = 0; i < SIZE; ++i) {
233	<	assertEquals(i, ((Integer)q.poll()).intValue());
233	>	assertEquals(i, q.poll());
234		}
235	<	assertNull(q.poll());
235	>	assertNull(q.poll());
236		}
237
238		/**
239	<	*
239	>	* peek returns next element, or null if empty
240		*/
241		public void testPeek() {
242		ConcurrentLinkedQueue q = populatedQueue(SIZE);
243		for (int i = 0; i < SIZE; ++i) {
244	<	assertEquals(i, ((Integer)q.peek()).intValue());
245	<	q.poll();
244	>	assertEquals(i, q.peek());
245	>	assertEquals(i, q.poll());
246		assertTrue(q.peek() == null ||
247	<	i != ((Integer)q.peek()).intValue());
247	>	!q.peek().equals(i));
248		}
249	<	assertNull(q.peek());
249	>	assertNull(q.peek());
250		}
251
252		/**
253	<	*
253	>	* element returns next element, or throws NSEE if empty
254		*/
255		public void testElement() {
256		ConcurrentLinkedQueue q = populatedQueue(SIZE);
257		for (int i = 0; i < SIZE; ++i) {
258	<	assertEquals(i, ((Integer)q.element()).intValue());
259	<	q.poll();
258	>	assertEquals(i, q.element());
259	>	assertEquals(i, q.poll());
260		}
261		try {
262		q.element();
263		shouldThrow();
264	<	}
250	<	catch (NoSuchElementException success) {}
264	>	} catch (NoSuchElementException success) {}
265		}
266
267		/**
268	<	*
268	>	* remove removes next element, or throws NSEE if empty
269		*/
270		public void testRemove() {
271		ConcurrentLinkedQueue q = populatedQueue(SIZE);
272		for (int i = 0; i < SIZE; ++i) {
273	<	assertEquals(i, ((Integer)q.remove()).intValue());
273	>	assertEquals(i, q.remove());
274		}
275		try {
276		q.remove();
277		shouldThrow();
278	<	} catch (NoSuchElementException success){
265	<	}
278	>	} catch (NoSuchElementException success) {}
279		}
280
281		/**
282	<	*
282	>	* remove(x) removes x and returns true if present
283		*/
284		public void testRemoveElement() {
285		ConcurrentLinkedQueue q = populatedQueue(SIZE);
#	Line 279 | Line 292 | public class ConcurrentLinkedQueueTest e
292		}
293		assertTrue(q.isEmpty());
294		}
295	<
295	>
296		/**
297	<	*
297	>	* contains(x) reports true when elements added but not yet removed
298		*/
299		public void testContains() {
300		ConcurrentLinkedQueue q = populatedQueue(SIZE);
#	Line 293 | Line 306 | public class ConcurrentLinkedQueueTest e
306		}
307
308		/**
309	<	*
309	>	* clear removes all elements
310		*/
311		public void testClear() {
312		ConcurrentLinkedQueue q = populatedQueue(SIZE);
#	Line 307 | Line 320 | public class ConcurrentLinkedQueueTest e
320		}
321
322		/**
323	<	*
323	>	* containsAll(c) is true when c contains a subset of elements
324		*/
325		public void testContainsAll() {
326		ConcurrentLinkedQueue q = populatedQueue(SIZE);
#	Line 321 | Line 334 | public class ConcurrentLinkedQueueTest e
334		}
335
336		/**
337	<	*
337	>	* retainAll(c) retains only those elements of c and reports true if change
338		*/
339		public void testRetainAll() {
340		ConcurrentLinkedQueue q = populatedQueue(SIZE);
#	Line 340 | Line 353 | public class ConcurrentLinkedQueueTest e
353		}
354
355		/**
356	<	*
356	>	* removeAll(c) removes only those elements of c and reports true if changed
357		*/
358		public void testRemoveAll() {
359		for (int i = 1; i < SIZE; ++i) {
#	Line 356 | Line 369 | public class ConcurrentLinkedQueueTest e
369		}
370
371		/**
372	<	*
372	>	* toArray contains all elements
373		*/
374		public void testToArray() {
375		ConcurrentLinkedQueue q = populatedQueue(SIZE);
376	<	Object[] o = q.toArray();
376	>	Object[] o = q.toArray();
377		Arrays.sort(o);
378	<	for(int i = 0; i < o.length; i++)
379	<	assertEquals(o[i], q.poll());
378	>	for (int i = 0; i < o.length; i++)
379	>	assertEquals(o[i], q.poll());
380		}
381
382		/**
383	<	*
383	>	* toArray(a) contains all elements
384		*/
385		public void testToArray2() {
386		ConcurrentLinkedQueue q = populatedQueue(SIZE);
387	<	Integer[] ints = new Integer[SIZE];
388	<	ints = (Integer[])q.toArray(ints);
387	>	Integer[] ints = new Integer[SIZE];
388	>	ints = (Integer[])q.toArray(ints);
389		Arrays.sort(ints);
390	<	for(int i = 0; i < ints.length; i++)
390	>	for (int i = 0; i < ints.length; i++)
391		assertEquals(ints[i], q.poll());
392		}
393	<
393	>
394	>	/**
395	>	* toArray(null) throws NPE
396	>	*/
397	>	public void testToArray_BadArg() {
398	>	ConcurrentLinkedQueue q = populatedQueue(SIZE);
399	>	try {
400	>	Object o[] = q.toArray(null);
401	>	shouldThrow();
402	>	} catch (NullPointerException success) {}
403	>	}
404	>
405	>	/**
406	>	* toArray with incompatible array type throws ArrayStoreException
407	>	*/
408	>	public void testToArray1_BadArg() {
409	>	ConcurrentLinkedQueue q = populatedQueue(SIZE);
410	>	try {
411	>	Object o[] = q.toArray(new String[10]);
412	>	shouldThrow();
413	>	} catch (ArrayStoreException success) {}
414	>	}
415	>
416		/**
417	<	*
417	>	* iterator iterates through all elements
418		*/
419		public void testIterator() {
420		ConcurrentLinkedQueue q = populatedQueue(SIZE);
421		int i = 0;
422	<	Iterator it = q.iterator();
423	<	while(it.hasNext()) {
422	>	Iterator it = q.iterator();
423	>	while (it.hasNext()) {
424		assertTrue(q.contains(it.next()));
425		++i;
426		}
#	Line 393 | Line 428 | public class ConcurrentLinkedQueueTest e
428		}
429
430		/**
431	<	*
431	>	* iterator ordering is FIFO
432		*/
433		public void testIteratorOrdering() {
434		final ConcurrentLinkedQueue q = new ConcurrentLinkedQueue();
#	Line 403 | Line 438 | public class ConcurrentLinkedQueueTest e
438
439		int k = 0;
440		for (Iterator it = q.iterator(); it.hasNext();) {
441	<	int i = ((Integer)(it.next())).intValue();
407	<	assertEquals(++k, i);
441	>	assertEquals(++k, it.next());
442		}
443
444		assertEquals(3, k);
445		}
446
447		/**
448	<	*
448	>	* Modifications do not cause iterators to fail
449		*/
450	<	public void testWeaklyConsistentIteration () {
450	>	public void testWeaklyConsistentIteration() {
451		final ConcurrentLinkedQueue q = new ConcurrentLinkedQueue();
452		q.add(one);
453		q.add(two);
454		q.add(three);
455
456	<	try {
457	<	for (Iterator it = q.iterator(); it.hasNext();) {
458	<	q.remove();
425	<	it.next();
426	<	}
427	<	}
428	<	catch (ConcurrentModificationException e) {
429	<	shouldThrow();
456	>	for (Iterator it = q.iterator(); it.hasNext();) {
457	>	q.remove();
458	>	it.next();
459		}
460
461		assertEquals("queue should be empty again", 0, q.size());
462		}
463
464		/**
465	<	*
465	>	* iterator.remove removes current element
466		*/
467	<	public void testIteratorRemove () {
467	>	public void testIteratorRemove() {
468		final ConcurrentLinkedQueue q = new ConcurrentLinkedQueue();
469		q.add(one);
470		q.add(two);
#	Line 444 | Line 473 | public class ConcurrentLinkedQueueTest e
473		it.next();
474		it.remove();
475		it = q.iterator();
476	<	assertEquals(it.next(), two);
477	<	assertEquals(it.next(), three);
476	>	assertSame(it.next(), two);
477	>	assertSame(it.next(), three);
478		assertFalse(it.hasNext());
479		}
480
481
482		/**
483	<	*
483	>	* toString contains toStrings of elements
484		*/
485		public void testToString() {
486		ConcurrentLinkedQueue q = populatedQueue(SIZE);
#	Line 459 | Line 488 | public class ConcurrentLinkedQueueTest e
488		for (int i = 0; i < SIZE; ++i) {
489		assertTrue(s.indexOf(String.valueOf(i)) >= 0);
490		}
491	<	}
491	>	}
492
493		/**
494	<	*
494	>	* A deserialized serialized queue has same elements in same order
495		*/
496	<	public void testSerialization() {
496	>	public void testSerialization() throws Exception {
497		ConcurrentLinkedQueue q = populatedQueue(SIZE);
498	<	try {
499	<	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
500	<	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
501	<	out.writeObject(q);
502	<	out.close();
503	<
504	<	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
505	<	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
506	<	ConcurrentLinkedQueue r = (ConcurrentLinkedQueue)in.readObject();
507	<	assertEquals(q.size(), r.size());
508	<	while (!q.isEmpty())
480	<	assertEquals(q.remove(), r.remove());
481	<	} catch(Exception e){
482	<	unexpectedException();
483	<	}
498	>	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
499	>	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
500	>	out.writeObject(q);
501	>	out.close();
502	>
503	>	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
504	>	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
505	>	ConcurrentLinkedQueue r = (ConcurrentLinkedQueue)in.readObject();
506	>	assertEquals(q.size(), r.size());
507	>	while (!q.isEmpty())
508	>	assertEquals(q.remove(), r.remove());
509		}
510
511		}

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