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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 1.33 by jsr166, Wed Dec 31 20:09:08 2014 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.*;
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	>	junit.textui.TestRunner.run(suite());
23		}
24
25		public static Test suite() {
26	<	return new TestSuite(ConcurrentLinkedQueueTest.class);
26	>	return new TestSuite(ConcurrentLinkedQueueTest.class);
27		}
28
29		/**
30	<	* Create a queue of given size containing consecutive
30	>	* Returns a new queue of given size containing consecutive
31		* Integers 0 ... n.
32		*/
33	<	private ConcurrentLinkedQueue populatedQueue(int n) {
34	<	ConcurrentLinkedQueue q = new ConcurrentLinkedQueue();
33	>	private ConcurrentLinkedQueue<Integer> populatedQueue(int n) {
34	>	ConcurrentLinkedQueue<Integer> q = new ConcurrentLinkedQueue<Integer>();
35		assertTrue(q.isEmpty());
36	<	for(int i = 0; i < n; ++i)
37	<	assertTrue(q.offer(new Integer(i)));
36	>	for (int i = 0; i < n; ++i)
37	>	assertTrue(q.offer(new Integer(i)));
38		assertFalse(q.isEmpty());
39	<	assertEquals(n, q.size());
39	>	assertEquals(n, q.size());
40		return q;
41		}
42	<
42	>
43		/**
44	<	*
44	>	* new queue is empty
45		*/
46		public void testConstructor1() {
47		assertEquals(0, new ConcurrentLinkedQueue().size());
48		}
49
50		/**
51	<	*
51	>	* Initializing from null Collection throws NPE
52		*/
53		public void testConstructor3() {
54		try {
55		ConcurrentLinkedQueue q = new ConcurrentLinkedQueue((Collection)null);
56		shouldThrow();
57	<	}
52	<	catch (NullPointerException success) {}
57	>	} catch (NullPointerException success) {}
58		}
59
60		/**
61	<	*
61	>	* Initializing from Collection of null elements throws NPE
62		*/
63		public void testConstructor4() {
64		try {
65		Integer[] ints = new Integer[SIZE];
66		ConcurrentLinkedQueue q = new ConcurrentLinkedQueue(Arrays.asList(ints));
67		shouldThrow();
68	<	}
64	<	catch (NullPointerException success) {}
68	>	} catch (NullPointerException success) {}
69		}
70
71		/**
72	<	*
72	>	* Initializing from Collection with some null elements throws NPE
73		*/
74		public void testConstructor5() {
75		try {
#	Line 74 | Line 78 | public class ConcurrentLinkedQueueTest e
78		ints[i] = new Integer(i);
79		ConcurrentLinkedQueue q = new ConcurrentLinkedQueue(Arrays.asList(ints));
80		shouldThrow();
81	<	}
78	<	catch (NullPointerException success) {}
81	>	} catch (NullPointerException success) {}
82		}
83
84		/**
85	<	*
85	>	* Queue contains all elements of collection used to initialize
86		*/
87		public void testConstructor6() {
88	<	try {
89	<	Integer[] ints = new Integer[SIZE];
90	<	for (int i = 0; i < SIZE; ++i)
91	<	ints[i] = new Integer(i);
92	<	ConcurrentLinkedQueue q = new ConcurrentLinkedQueue(Arrays.asList(ints));
93	<	for (int i = 0; i < SIZE; ++i)
91	<	assertEquals(ints[i], q.poll());
92	<	}
93	<	finally {}
88	>	Integer[] ints = new Integer[SIZE];
89	>	for (int i = 0; i < SIZE; ++i)
90	>	ints[i] = new Integer(i);
91	>	ConcurrentLinkedQueue q = new ConcurrentLinkedQueue(Arrays.asList(ints));
92	>	for (int i = 0; i < SIZE; ++i)
93	>	assertEquals(ints[i], q.poll());
94		}
95
96		/**
97	<	*
97	>	* isEmpty is true before add, false after
98		*/
99		public void testEmpty() {
100		ConcurrentLinkedQueue q = new ConcurrentLinkedQueue();
#	Line 108 | Line 108 | public class ConcurrentLinkedQueueTest e
108		}
109
110		/**
111	<	*
111	>	* size changes when elements added and removed
112		*/
113		public void testSize() {
114		ConcurrentLinkedQueue q = populatedQueue(SIZE);
#	Line 123 | Line 123 | public class ConcurrentLinkedQueueTest e
123		}
124
125		/**
126	<	*
126	>	* offer(null) throws NPE
127		*/
128		public void testOfferNull() {
129	<	try {
129	>	try {
130		ConcurrentLinkedQueue q = new ConcurrentLinkedQueue();
131		q.offer(null);
132		shouldThrow();
133	<	} catch (NullPointerException success) { }
133	>	} catch (NullPointerException success) {}
134	>	}
135	>
136	>	/**
137	>	* add(null) throws NPE
138	>	*/
139	>	public void testAddNull() {
140	>	try {
141	>	ConcurrentLinkedQueue q = new ConcurrentLinkedQueue();
142	>	q.add(null);
143	>	shouldThrow();
144	>	} catch (NullPointerException success) {}
145		}
146
147		/**
148	<	*
148	>	* Offer returns true
149		*/
150		public void testOffer() {
151		ConcurrentLinkedQueue q = new ConcurrentLinkedQueue();
#	Line 143 | Line 154 | public class ConcurrentLinkedQueueTest e
154		}
155
156		/**
157	<	*
157	>	* add returns true
158		*/
159		public void testAdd() {
160		ConcurrentLinkedQueue q = new ConcurrentLinkedQueue();
#	Line 154 | Line 165 | public class ConcurrentLinkedQueueTest e
165		}
166
167		/**
168	<	*
168	>	* addAll(null) throws NPE
169		*/
170		public void testAddAll1() {
171		try {
172		ConcurrentLinkedQueue q = new ConcurrentLinkedQueue();
173		q.addAll(null);
174		shouldThrow();
175	<	}
176	<	catch (NullPointerException success) {}
175	>	} catch (NullPointerException success) {}
176	>	}
177	>
178	>	/**
179	>	* addAll(this) throws IAE
180	>	*/
181	>	public void testAddAllSelf() {
182	>	try {
183	>	ConcurrentLinkedQueue q = populatedQueue(SIZE);
184	>	q.addAll(q);
185	>	shouldThrow();
186	>	} catch (IllegalArgumentException success) {}
187		}
188	+
189		/**
190	<	*
190	>	* addAll of a collection with null elements throws NPE
191		*/
192		public void testAddAll2() {
193		try {
#	Line 173 | Line 195 | public class ConcurrentLinkedQueueTest e
195		Integer[] ints = new Integer[SIZE];
196		q.addAll(Arrays.asList(ints));
197		shouldThrow();
198	<	}
177	<	catch (NullPointerException success) {}
198	>	} catch (NullPointerException success) {}
199		}
200	+
201		/**
202	<	*
202	>	* addAll of a collection with any null elements throws NPE after
203	>	* possibly adding some elements
204		*/
205		public void testAddAll3() {
206		try {
#	Line 187 | Line 210 | public class ConcurrentLinkedQueueTest e
210		ints[i] = new Integer(i);
211		q.addAll(Arrays.asList(ints));
212		shouldThrow();
213	<	}
191	<	catch (NullPointerException success) {}
213	>	} catch (NullPointerException success) {}
214		}
215
216		/**
217	<	*
217	>	* Queue contains all elements, in traversal order, of successful addAll
218		*/
219		public void testAddAll5() {
220	<	try {
221	<	Integer[] empty = new Integer[0];
222	<	Integer[] ints = new Integer[SIZE];
223	<	for (int i = 0; i < SIZE; ++i)
224	<	ints[i] = new Integer(i);
225	<	ConcurrentLinkedQueue q = new ConcurrentLinkedQueue();
226	<	assertFalse(q.addAll(Arrays.asList(empty)));
227	<	assertTrue(q.addAll(Arrays.asList(ints)));
228	<	for (int i = 0; i < SIZE; ++i)
207	<	assertEquals(ints[i], q.poll());
208	<	}
209	<	finally {}
220	>	Integer[] empty = new Integer[0];
221	>	Integer[] ints = new Integer[SIZE];
222	>	for (int i = 0; i < SIZE; ++i)
223	>	ints[i] = new Integer(i);
224	>	ConcurrentLinkedQueue q = new ConcurrentLinkedQueue();
225	>	assertFalse(q.addAll(Arrays.asList(empty)));
226	>	assertTrue(q.addAll(Arrays.asList(ints)));
227	>	for (int i = 0; i < SIZE; ++i)
228	>	assertEquals(ints[i], q.poll());
229		}
230
231		/**
232	<	*
232	>	* poll succeeds unless empty
233		*/
234		public void testPoll() {
235		ConcurrentLinkedQueue q = populatedQueue(SIZE);
236		for (int i = 0; i < SIZE; ++i) {
237	<	assertEquals(i, ((Integer)q.poll()).intValue());
237	>	assertEquals(i, q.poll());
238		}
239	<	assertNull(q.poll());
239	>	assertNull(q.poll());
240		}
241
242		/**
243	<	*
243	>	* peek returns next element, or null if empty
244		*/
245		public void testPeek() {
246		ConcurrentLinkedQueue q = populatedQueue(SIZE);
247		for (int i = 0; i < SIZE; ++i) {
248	<	assertEquals(i, ((Integer)q.peek()).intValue());
249	<	q.poll();
248	>	assertEquals(i, q.peek());
249	>	assertEquals(i, q.poll());
250		assertTrue(q.peek() == null ||
251	<	i != ((Integer)q.peek()).intValue());
251	>	!q.peek().equals(i));
252		}
253	<	assertNull(q.peek());
253	>	assertNull(q.peek());
254		}
255
256		/**
257	<	*
257	>	* element returns next element, or throws NSEE if empty
258		*/
259		public void testElement() {
260		ConcurrentLinkedQueue q = populatedQueue(SIZE);
261		for (int i = 0; i < SIZE; ++i) {
262	<	assertEquals(i, ((Integer)q.element()).intValue());
263	<	q.poll();
262	>	assertEquals(i, q.element());
263	>	assertEquals(i, q.poll());
264		}
265		try {
266		q.element();
267		shouldThrow();
268	<	}
250	<	catch (NoSuchElementException success) {}
268	>	} catch (NoSuchElementException success) {}
269		}
270
271		/**
272	<	*
272	>	* remove removes next element, or throws NSEE if empty
273		*/
274		public void testRemove() {
275		ConcurrentLinkedQueue q = populatedQueue(SIZE);
276		for (int i = 0; i < SIZE; ++i) {
277	<	assertEquals(i, ((Integer)q.remove()).intValue());
277	>	assertEquals(i, q.remove());
278		}
279		try {
280		q.remove();
281		shouldThrow();
282	<	} catch (NoSuchElementException success){
265	<	}
282	>	} catch (NoSuchElementException success) {}
283		}
284
285		/**
286	<	*
286	>	* remove(x) removes x and returns true if present
287		*/
288		public void testRemoveElement() {
289		ConcurrentLinkedQueue q = populatedQueue(SIZE);
290	<	for (int i = 1; i < SIZE; i+=2) {
291	<	assertTrue(q.remove(new Integer(i)));
292	<	}
293	<	for (int i = 0; i < SIZE; i+=2) {
294	<	assertTrue(q.remove(new Integer(i)));
295	<	assertFalse(q.remove(new Integer(i+1)));
290	>	for (int i = 1; i < SIZE; i += 2) {
291	>	assertTrue(q.contains(i));
292	>	assertTrue(q.remove(i));
293	>	assertFalse(q.contains(i));
294	>	assertTrue(q.contains(i-1));
295	>	}
296	>	for (int i = 0; i < SIZE; i += 2) {
297	>	assertTrue(q.contains(i));
298	>	assertTrue(q.remove(i));
299	>	assertFalse(q.contains(i));
300	>	assertFalse(q.remove(i+1));
301	>	assertFalse(q.contains(i+1));
302		}
303		assertTrue(q.isEmpty());
304		}
305	<
305	>
306		/**
307	<	*
307	>	* contains(x) reports true when elements added but not yet removed
308		*/
309		public void testContains() {
310		ConcurrentLinkedQueue q = populatedQueue(SIZE);
#	Line 293 | Line 316 | public class ConcurrentLinkedQueueTest e
316		}
317
318		/**
319	<	*
319	>	* clear removes all elements
320		*/
321		public void testClear() {
322		ConcurrentLinkedQueue q = populatedQueue(SIZE);
#	Line 307 | Line 330 | public class ConcurrentLinkedQueueTest e
330		}
331
332		/**
333	<	*
333	>	* containsAll(c) is true when c contains a subset of elements
334		*/
335		public void testContainsAll() {
336		ConcurrentLinkedQueue q = populatedQueue(SIZE);
#	Line 321 | Line 344 | public class ConcurrentLinkedQueueTest e
344		}
345
346		/**
347	<	*
347	>	* retainAll(c) retains only those elements of c and reports true if change
348		*/
349		public void testRetainAll() {
350		ConcurrentLinkedQueue q = populatedQueue(SIZE);
#	Line 340 | Line 363 | public class ConcurrentLinkedQueueTest e
363		}
364
365		/**
366	<	*
366	>	* removeAll(c) removes only those elements of c and reports true if changed
367		*/
368		public void testRemoveAll() {
369		for (int i = 1; i < SIZE; ++i) {
#	Line 356 | Line 379 | public class ConcurrentLinkedQueueTest e
379		}
380
381		/**
382	<	*
382	>	* toArray contains all elements in FIFO order
383		*/
384		public void testToArray() {
385		ConcurrentLinkedQueue q = populatedQueue(SIZE);
386	<	Object[] o = q.toArray();
387	<	Arrays.sort(o);
388	<	for(int i = 0; i < o.length; i++)
366	<	assertEquals(o[i], q.poll());
386	>	Object[] o = q.toArray();
387	>	for (int i = 0; i < o.length; i++)
388	>	assertSame(o[i], q.poll());
389		}
390
391		/**
392	<	*
392	>	* toArray(a) contains all elements in FIFO order
393		*/
394		public void testToArray2() {
395	+	ConcurrentLinkedQueue<Integer> q = populatedQueue(SIZE);
396	+	Integer[] ints = new Integer[SIZE];
397	+	Integer[] array = q.toArray(ints);
398	+	assertSame(ints, array);
399	+	for (int i = 0; i < ints.length; i++)
400	+	assertSame(ints[i], q.poll());
401	+	}
402	+
403	+	/**
404	+	* toArray(null) throws NullPointerException
405	+	*/
406	+	public void testToArray_NullArg() {
407		ConcurrentLinkedQueue q = populatedQueue(SIZE);
408	<	Integer[] ints = new Integer[SIZE];
409	<	ints = (Integer[])q.toArray(ints);
410	<	Arrays.sort(ints);
411	<	for(int i = 0; i < ints.length; i++)
378	<	assertEquals(ints[i], q.poll());
408	>	try {
409	>	q.toArray(null);
410	>	shouldThrow();
411	>	} catch (NullPointerException success) {}
412		}
413	<
413	>
414		/**
415	<	*
415	>	* toArray(incompatible array type) throws ArrayStoreException
416	>	*/
417	>	public void testToArray1_BadArg() {
418	>	ConcurrentLinkedQueue q = populatedQueue(SIZE);
419	>	try {
420	>	q.toArray(new String[10]);
421	>	shouldThrow();
422	>	} catch (ArrayStoreException success) {}
423	>	}
424	>
425	>	/**
426	>	* iterator iterates through all elements
427		*/
428		public void testIterator() {
429		ConcurrentLinkedQueue q = populatedQueue(SIZE);
430		int i = 0;
431	<	Iterator it = q.iterator();
432	<	while(it.hasNext()) {
431	>	Iterator it = q.iterator();
432	>	while (it.hasNext()) {
433		assertTrue(q.contains(it.next()));
434		++i;
435		}
#	Line 393 | Line 437 | public class ConcurrentLinkedQueueTest e
437		}
438
439		/**
440	<	*
440	>	* iterator ordering is FIFO
441		*/
442		public void testIteratorOrdering() {
443		final ConcurrentLinkedQueue q = new ConcurrentLinkedQueue();
#	Line 403 | Line 447 | public class ConcurrentLinkedQueueTest e
447
448		int k = 0;
449		for (Iterator it = q.iterator(); it.hasNext();) {
450	<	int i = ((Integer)(it.next())).intValue();
407	<	assertEquals(++k, i);
450	>	assertEquals(++k, it.next());
451		}
452
453		assertEquals(3, k);
454		}
455
456		/**
457	<	*
457	>	* Modifications do not cause iterators to fail
458		*/
459	<	public void testWeaklyConsistentIteration () {
459	>	public void testWeaklyConsistentIteration() {
460		final ConcurrentLinkedQueue q = new ConcurrentLinkedQueue();
461		q.add(one);
462		q.add(two);
463		q.add(three);
464
465	<	try {
466	<	for (Iterator it = q.iterator(); it.hasNext();) {
467	<	q.remove();
425	<	it.next();
426	<	}
427	<	}
428	<	catch (ConcurrentModificationException e) {
429	<	shouldThrow();
465	>	for (Iterator it = q.iterator(); it.hasNext();) {
466	>	q.remove();
467	>	it.next();
468		}
469
470		assertEquals("queue should be empty again", 0, q.size());
471		}
472
473		/**
474	<	*
474	>	* iterator.remove removes current element
475		*/
476	<	public void testIteratorRemove () {
476	>	public void testIteratorRemove() {
477		final ConcurrentLinkedQueue q = new ConcurrentLinkedQueue();
478		q.add(one);
479		q.add(two);
#	Line 444 | Line 482 | public class ConcurrentLinkedQueueTest e
482		it.next();
483		it.remove();
484		it = q.iterator();
485	<	assertEquals(it.next(), two);
486	<	assertEquals(it.next(), three);
485	>	assertSame(it.next(), two);
486	>	assertSame(it.next(), three);
487		assertFalse(it.hasNext());
488		}
489
452	–
490		/**
491	<	*
491	>	* toString contains toStrings of elements
492		*/
493		public void testToString() {
494		ConcurrentLinkedQueue q = populatedQueue(SIZE);
495		String s = q.toString();
496		for (int i = 0; i < SIZE; ++i) {
497	<	assertTrue(s.indexOf(String.valueOf(i)) >= 0);
497	>	assertTrue(s.contains(String.valueOf(i)));
498		}
499	<	}
499	>	}
500
501		/**
502	<	*
502	>	* A deserialized serialized queue has same elements in same order
503		*/
504	<	public void testSerialization() {
505	<	ConcurrentLinkedQueue q = populatedQueue(SIZE);
506	<	try {
470	<	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
471	<	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
472	<	out.writeObject(q);
473	<	out.close();
504	>	public void testSerialization() throws Exception {
505	>	Queue x = populatedQueue(SIZE);
506	>	Queue y = serialClone(x);
507
508	<	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
509	<	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
510	<	ConcurrentLinkedQueue r = (ConcurrentLinkedQueue)in.readObject();
511	<	assertEquals(q.size(), r.size());
512	<	while (!q.isEmpty())
513	<	assertEquals(q.remove(), r.remove());
514	<	} catch(Exception e){
482	<	unexpectedException();
508	>	assertNotSame(x, y);
509	>	assertEquals(x.size(), y.size());
510	>	assertEquals(x.toString(), y.toString());
511	>	assertTrue(Arrays.equals(x.toArray(), y.toArray()));
512	>	while (!x.isEmpty()) {
513	>	assertFalse(y.isEmpty());
514	>	assertEquals(x.remove(), y.remove());
515		}
516	+	assertTrue(y.isEmpty());
517		}
518
519	+	/**
520	+	* remove(null), contains(null) always return false
521	+	*/
522	+	public void testNeverContainsNull() {
523	+	Collection<?>[] qs = {
524	+	new ConcurrentLinkedQueue<Object>(),
525	+	populatedQueue(2),
526	+	};
527	+
528	+	for (Collection<?> q : qs) {
529	+	assertFalse(q.contains(null));
530	+	assertFalse(q.remove(null));
531	+	}
532	+	}
533		}

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