ViewVC Help

View File | Revision Log | Show Annotations | Download File | Root Listing

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

Comparing jsr166/src/test/tck/ReentrantReadWriteLockTest.java (file contents):
Revision 1.3 by dl, Sun Sep 14 20:42:40 2003 UTC vs.
Revision 1.21 by dl, Thu Jan 20 00:39:13 2005 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.*;
10		import java.util.concurrent.locks.*;
11		import java.util.concurrent.*;
12		import java.io.*;
13	+	import java.util.*;
14
15		public class ReentrantReadWriteLockTest extends JSR166TestCase {
16		public static void main(String[] args) {
#	Line 18 | Line 20 | public class ReentrantReadWriteLockTest
20		return new TestSuite(ReentrantReadWriteLockTest.class);
21		}
22
23	<	static int HOLD_COUNT_TEST_LIMIT = 20;
23	>	/**
24	>	* A runnable calling lockInterruptibly
25	>	*/
26	>	class InterruptibleLockRunnable implements Runnable {
27	>	final ReentrantReadWriteLock lock;
28	>	InterruptibleLockRunnable(ReentrantReadWriteLock l) { lock = l; }
29	>	public void run() {
30	>	try {
31	>	lock.writeLock().lockInterruptibly();
32	>	} catch(InterruptedException success){}
33	>	}
34	>	}
35	>
36	>
37	>	/**
38	>	* A runnable calling lockInterruptibly that expects to be
39	>	* interrupted
40	>	*/
41	>	class InterruptedLockRunnable implements Runnable {
42	>	final ReentrantReadWriteLock lock;
43	>	InterruptedLockRunnable(ReentrantReadWriteLock l) { lock = l; }
44	>	public void run() {
45	>	try {
46	>	lock.writeLock().lockInterruptibly();
47	>	threadShouldThrow();
48	>	} catch(InterruptedException success){}
49	>	}
50	>	}
51
52	<	/*
53	<	* Unlocks an unlocked lock, throws Illegal Monitor State
25	<	*
52	>	/**
53	>	* Subclass to expose protected methods
54		*/
55	<	public void testIllegalMonitorStateException(){
55	>	static class PublicReentrantReadWriteLock extends ReentrantReadWriteLock {
56	>	PublicReentrantReadWriteLock() { super(); }
57	>	public Collection<Thread> getQueuedThreads() {
58	>	return super.getQueuedThreads();
59	>	}
60	>	public Collection<Thread> getWaitingThreads(Condition c) {
61	>	return super.getWaitingThreads(c);
62	>	}
63	>	}
64	>
65	>	/**
66	>	* Constructor sets given fairness, and is in unlocked state
67	>	*/
68	>	public void testConstructor() {
69		ReentrantReadWriteLock rl = new ReentrantReadWriteLock();
70	<	try{
71	<	rl.writeLock().unlock();
72	<	fail("Should of thown Illegal Monitor State Exception");
70	>	assertFalse(rl.isFair());
71	>	assertFalse(rl.isWriteLocked());
72	>	assertEquals(0, rl.getReadLockCount());
73	>	ReentrantReadWriteLock r2 = new ReentrantReadWriteLock(true);
74	>	assertTrue(r2.isFair());
75	>	assertFalse(r2.isWriteLocked());
76	>	assertEquals(0, r2.getReadLockCount());
77	>	}
78	>
79	>	/**
80	>	* write-locking and read-locking an unlocked lock succeed
81	>	*/
82	>	public void testLock() {
83	>	ReentrantReadWriteLock rl = new ReentrantReadWriteLock();
84	>	rl.writeLock().lock();
85	>	assertTrue(rl.isWriteLocked());
86	>	assertTrue(rl.isWriteLockedByCurrentThread());
87	>	assertEquals(0, rl.getReadLockCount());
88	>	rl.writeLock().unlock();
89	>	assertFalse(rl.isWriteLocked());
90	>	assertFalse(rl.isWriteLockedByCurrentThread());
91	>	assertEquals(0, rl.getReadLockCount());
92	>	rl.readLock().lock();
93	>	assertFalse(rl.isWriteLocked());
94	>	assertFalse(rl.isWriteLockedByCurrentThread());
95	>	assertEquals(1, rl.getReadLockCount());
96	>	rl.readLock().unlock();
97	>	assertFalse(rl.isWriteLocked());
98	>	assertFalse(rl.isWriteLockedByCurrentThread());
99	>	assertEquals(0, rl.getReadLockCount());
100	>	}
101	>
102	>
103	>	/**
104	>	* locking an unlocked fair lock succeeds
105	>	*/
106	>	public void testFairLock() {
107	>	ReentrantReadWriteLock rl = new ReentrantReadWriteLock(true);
108	>	rl.writeLock().lock();
109	>	assertTrue(rl.isWriteLocked());
110	>	assertTrue(rl.isWriteLockedByCurrentThread());
111	>	assertEquals(0, rl.getReadLockCount());
112	>	rl.writeLock().unlock();
113	>	assertFalse(rl.isWriteLocked());
114	>	assertFalse(rl.isWriteLockedByCurrentThread());
115	>	assertEquals(0, rl.getReadLockCount());
116	>	rl.readLock().lock();
117	>	assertFalse(rl.isWriteLocked());
118	>	assertFalse(rl.isWriteLockedByCurrentThread());
119	>	assertEquals(1, rl.getReadLockCount());
120	>	rl.readLock().unlock();
121	>	assertFalse(rl.isWriteLocked());
122	>	assertFalse(rl.isWriteLockedByCurrentThread());
123	>	assertEquals(0, rl.getReadLockCount());
124	>	}
125
126	<	}catch(IllegalMonitorStateException success){}
126	>	/**
127	>	* getWriteHoldCount returns number of recursive holds
128	>	*/
129	>	public void testGetHoldCount() {
130	>	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
131	>	for(int i = 1; i <= SIZE; i++) {
132	>	lock.writeLock().lock();
133	>	assertEquals(i,lock.getWriteHoldCount());
134	>	}
135	>	for(int i = SIZE; i > 0; i--) {
136	>	lock.writeLock().unlock();
137	>	assertEquals(i-1,lock.getWriteHoldCount());
138	>	}
139		}
140	+
141
142	+	/**
143	+	* write-unlocking an unlocked lock throws IllegalMonitorStateException
144	+	*/
145	+	public void testUnlock_IllegalMonitorStateException() {
146	+	ReentrantReadWriteLock rl = new ReentrantReadWriteLock();
147	+	try {
148	+	rl.writeLock().unlock();
149	+	shouldThrow();
150	+	} catch(IllegalMonitorStateException success){}
151	+	}
152
153
154	<	public void testInterruptedException(){
154	>	/**
155	>	* write-lockInterruptibly is interruptible
156	>	*/
157	>	public void testWriteLockInterruptibly_Interrupted() {
158		final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
40	–	lock.writeLock().lock();
159		Thread t = new Thread(new Runnable() {
160	<	public void run(){
161	<	try{
160	>	public void run() {
161	>	try {
162		lock.writeLock().lockInterruptibly();
163	<	threadFail("should throw");
164	<	}catch(InterruptedException success){}
163	>	lock.writeLock().unlock();
164	>	lock.writeLock().lockInterruptibly();
165	>	lock.writeLock().unlock();
166	>	} catch(InterruptedException success){}
167		}
168		});
169		try {
170	+	lock.writeLock().lock();
171		t.start();
172		t.interrupt();
173		lock.writeLock().unlock();
174		t.join();
175		} catch(Exception e){
176	<	fail("unexpected exception");
176	>	unexpectedException();
177		}
178		}
179
180	<	public void testInterruptedException2(){
180	>	/**
181	>	* timed write-tryLock is interruptible
182	>	*/
183	>	public void testWriteTryLock_Interrupted() {
184		final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
185		lock.writeLock().lock();
186		Thread t = new Thread(new Runnable() {
187	<	public void run(){
188	<	try{
187	>	public void run() {
188	>	try {
189		lock.writeLock().tryLock(1000,TimeUnit.MILLISECONDS);
190	<	threadFail("should throw");
67	<	}catch(InterruptedException success){}
190	>	} catch(InterruptedException success){}
191		}
192		});
193		try {
#	Line 73 | Line 196 | public class ReentrantReadWriteLockTest
196		lock.writeLock().unlock();
197		t.join();
198		} catch(Exception e){
199	<	fail("unexpected exception");
199	>	unexpectedException();
200		}
201		}
202
203	<	public void testInterruptedException3(){
203	>	/**
204	>	* read-lockInterruptibly is interruptible
205	>	*/
206	>	public void testReadLockInterruptibly_Interrupted() {
207		final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
208		lock.writeLock().lock();
209		Thread t = new Thread(new Runnable() {
210	<	public void run(){
211	<	try{
210	>	public void run() {
211	>	try {
212		lock.readLock().lockInterruptibly();
213	<	threadFail("should throw");
88	<	}catch(InterruptedException success){}
213	>	} catch(InterruptedException success){}
214		}
215		});
216		try {
#	Line 94 | Line 219 | public class ReentrantReadWriteLockTest
219		lock.writeLock().unlock();
220		t.join();
221		} catch(Exception e){
222	<	fail("unexpected exception");
222	>	unexpectedException();
223		}
224		}
225
226	<	public void testInterruptedException4(){
226	>	/**
227	>	* timed read-tryLock is interruptible
228	>	*/
229	>	public void testReadTryLock_Interrupted() {
230		final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
231		lock.writeLock().lock();
232		Thread t = new Thread(new Runnable() {
233	<	public void run(){
234	<	try{
233	>	public void run() {
234	>	try {
235		lock.readLock().tryLock(1000,TimeUnit.MILLISECONDS);
236	<	threadFail("should throw");
237	<	}catch(InterruptedException success){}
236	>	threadShouldThrow();
237	>	} catch(InterruptedException success){}
238		}
239		});
240		try {
#	Line 114 | Line 242 | public class ReentrantReadWriteLockTest
242		t.interrupt();
243		t.join();
244		} catch(Exception e){
245	<	fail("unexpected exception");
245	>	unexpectedException();
246		}
247		}
248
249
250	<	public void testTryLockWhenLocked() {
250	>	/**
251	>	* write-tryLock fails if locked
252	>	*/
253	>	public void testWriteTryLockWhenLocked() {
254		final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
255		lock.writeLock().lock();
256		Thread t = new Thread(new Runnable() {
257	<	public void run(){
257	>	public void run() {
258		threadAssertFalse(lock.writeLock().tryLock());
259		}
260		});
#	Line 132 | Line 263 | public class ReentrantReadWriteLockTest
263		t.join();
264		lock.writeLock().unlock();
265		} catch(Exception e){
266	<	fail("unexpected exception");
266	>	unexpectedException();
267		}
268		}
269
270	<	public void testTryLockWhenLocked2() {
270	>	/**
271	>	* read-tryLock fails if locked
272	>	*/
273	>	public void testReadTryLockWhenLocked() {
274		final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
275		lock.writeLock().lock();
276		Thread t = new Thread(new Runnable() {
277	<	public void run(){
277	>	public void run() {
278		threadAssertFalse(lock.readLock().tryLock());
279		}
280		});
#	Line 149 | Line 283 | public class ReentrantReadWriteLockTest
283		t.join();
284		lock.writeLock().unlock();
285		} catch(Exception e){
286	<	fail("unexpected exception");
286	>	unexpectedException();
287		}
288		}
289
290	+	/**
291	+	* Multiple threads can hold a read lock when not write-locked
292	+	*/
293		public void testMultipleReadLocks() {
294		final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
295		lock.readLock().lock();
296		Thread t = new Thread(new Runnable() {
297	<	public void run(){
297	>	public void run() {
298		threadAssertTrue(lock.readLock().tryLock());
299		lock.readLock().unlock();
300		}
#	Line 167 | Line 304 | public class ReentrantReadWriteLockTest
304		t.join();
305		lock.readLock().unlock();
306		} catch(Exception e){
307	<	fail("unexpected exception");
307	>	unexpectedException();
308		}
309		}
310
311	+	/**
312	+	* A writelock succeeds after reading threads unlock
313	+	*/
314		public void testWriteAfterMultipleReadLocks() {
315		final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
316		lock.readLock().lock();
317		Thread t1 = new Thread(new Runnable() {
318	<	public void run(){
318	>	public void run() {
319		lock.readLock().lock();
320		lock.readLock().unlock();
321		}
322		});
323		Thread t2 = new Thread(new Runnable() {
324	<	public void run(){
324	>	public void run() {
325		lock.writeLock().lock();
326		lock.writeLock().unlock();
327		}
#	Line 198 | Line 338 | public class ReentrantReadWriteLockTest
338		assertTrue(!t2.isAlive());
339
340		} catch(Exception e){
341	<	fail("unexpected exception");
341	>	unexpectedException();
342		}
343		}
344
345	+	/**
346	+	* Readlocks succeed after a writing thread unlocks
347	+	*/
348		public void testReadAfterWriteLock() {
349		final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
350		lock.writeLock().lock();
351		Thread t1 = new Thread(new Runnable() {
352	<	public void run(){
352	>	public void run() {
353	>	lock.readLock().lock();
354	>	lock.readLock().unlock();
355	>	}
356	>	});
357	>	Thread t2 = new Thread(new Runnable() {
358	>	public void run() {
359	>	lock.readLock().lock();
360	>	lock.readLock().unlock();
361	>	}
362	>	});
363	>
364	>	try {
365	>	t1.start();
366	>	t2.start();
367	>	Thread.sleep(SHORT_DELAY_MS);
368	>	lock.writeLock().unlock();
369	>	t1.join(MEDIUM_DELAY_MS);
370	>	t2.join(MEDIUM_DELAY_MS);
371	>	assertTrue(!t1.isAlive());
372	>	assertTrue(!t2.isAlive());
373	>
374	>	} catch(Exception e){
375	>	unexpectedException();
376	>	}
377	>	}
378	>
379	>	/**
380	>	* Read trylock succeeds if write locked by current thread
381	>	*/
382	>	public void testReadHoldingWriteLock() {
383	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
384	>	lock.writeLock().lock();
385	>	assertTrue(lock.readLock().tryLock());
386	>	lock.readLock().unlock();
387	>	lock.writeLock().unlock();
388	>	}
389	>
390	>	/**
391	>	* Read lock succeeds if write locked by current thread even if
392	>	* other threads are waiting
393	>	*/
394	>	public void testReadHoldingWriteLock2() {
395	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
396	>	lock.writeLock().lock();
397	>	Thread t1 = new Thread(new Runnable() {
398	>	public void run() {
399	>	lock.readLock().lock();
400	>	lock.readLock().unlock();
401	>	}
402	>	});
403	>	Thread t2 = new Thread(new Runnable() {
404	>	public void run() {
405	>	lock.readLock().lock();
406	>	lock.readLock().unlock();
407	>	}
408	>	});
409	>
410	>	try {
411	>	t1.start();
412	>	t2.start();
413	>	lock.readLock().lock();
414	>	lock.readLock().unlock();
415	>	Thread.sleep(SHORT_DELAY_MS);
416	>	lock.readLock().lock();
417	>	lock.readLock().unlock();
418	>	lock.writeLock().unlock();
419	>	t1.join(MEDIUM_DELAY_MS);
420	>	t2.join(MEDIUM_DELAY_MS);
421	>	assertTrue(!t1.isAlive());
422	>	assertTrue(!t2.isAlive());
423	>
424	>	} catch(Exception e){
425	>	unexpectedException();
426	>	}
427	>	}
428	>
429	>	/**
430	>	* Fair Read trylock succeeds if write locked by current thread
431	>	*/
432	>	public void testReadHoldingWriteLockFair() {
433	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
434	>	lock.writeLock().lock();
435	>	assertTrue(lock.readLock().tryLock());
436	>	lock.readLock().unlock();
437	>	lock.writeLock().unlock();
438	>	}
439	>
440	>	/**
441	>	* Fair Read lock succeeds if write locked by current thread even if
442	>	* other threads are waiting
443	>	*/
444	>	public void testReadHoldingWriteLockFair2() {
445	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
446	>	lock.writeLock().lock();
447	>	Thread t1 = new Thread(new Runnable() {
448	>	public void run() {
449		lock.readLock().lock();
450		lock.readLock().unlock();
451		}
452		});
453		Thread t2 = new Thread(new Runnable() {
454	<	public void run(){
454	>	public void run() {
455		lock.readLock().lock();
456		lock.readLock().unlock();
457		}
#	Line 221 | Line 460 | public class ReentrantReadWriteLockTest
460		try {
461		t1.start();
462		t2.start();
463	+	lock.readLock().lock();
464	+	lock.readLock().unlock();
465		Thread.sleep(SHORT_DELAY_MS);
466	+	lock.readLock().lock();
467	+	lock.readLock().unlock();
468		lock.writeLock().unlock();
469		t1.join(MEDIUM_DELAY_MS);
470		t2.join(MEDIUM_DELAY_MS);
#	Line 229 | Line 472 | public class ReentrantReadWriteLockTest
472		assertTrue(!t2.isAlive());
473
474		} catch(Exception e){
475	<	fail("unexpected exception");
475	>	unexpectedException();
476		}
477		}
478
479
480	+	/**
481	+	* Read tryLock succeeds if readlocked but not writelocked
482	+	*/
483		public void testTryLockWhenReadLocked() {
484		final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
485		lock.readLock().lock();
486		Thread t = new Thread(new Runnable() {
487	<	public void run(){
487	>	public void run() {
488		threadAssertTrue(lock.readLock().tryLock());
489		lock.readLock().unlock();
490		}
#	Line 248 | Line 494 | public class ReentrantReadWriteLockTest
494		t.join();
495		lock.readLock().unlock();
496		} catch(Exception e){
497	<	fail("unexpected exception");
497	>	unexpectedException();
498		}
499		}
500
501
502
503	+	/**
504	+	* write tryLock fails when readlocked
505	+	*/
506		public void testWriteTryLockWhenReadLocked() {
507		final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
508		lock.readLock().lock();
509		Thread t = new Thread(new Runnable() {
510	<	public void run(){
510	>	public void run() {
511		threadAssertFalse(lock.writeLock().tryLock());
512		}
513		});
#	Line 267 | Line 516 | public class ReentrantReadWriteLockTest
516		t.join();
517		lock.readLock().unlock();
518		} catch(Exception e){
519	<	fail("unexpected exception");
519	>	unexpectedException();
520		}
521		}
522
523
524
525	<	public void testTryLock_Timeout(){
525	>	/**
526	>	* write timed tryLock times out if locked
527	>	*/
528	>	public void testWriteTryLock_Timeout() {
529		final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
530		lock.writeLock().lock();
531		Thread t = new Thread(new Runnable() {
532	<	public void run(){
532	>	public void run() {
533		try {
534		threadAssertFalse(lock.writeLock().tryLock(1, TimeUnit.MILLISECONDS));
535		} catch (Exception ex) {
536	<	threadFail("unexpected exception");
536	>	threadUnexpectedException();
537		}
538		}
539		});
#	Line 290 | Line 542 | public class ReentrantReadWriteLockTest
542		t.join();
543		lock.writeLock().unlock();
544		} catch(Exception e){
545	<	fail("unexpected exception");
545	>	unexpectedException();
546		}
547		}
548
549	<	public void testTryLock_Timeout2(){
549	>	/**
550	>	* read timed tryLock times out if write-locked
551	>	*/
552	>	public void testReadTryLock_Timeout() {
553		final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
554		lock.writeLock().lock();
555		Thread t = new Thread(new Runnable() {
556	<	public void run(){
556	>	public void run() {
557		try {
558		threadAssertFalse(lock.readLock().tryLock(1, TimeUnit.MILLISECONDS));
559		} catch (Exception ex) {
560	<	threadFail("unexpected exception");
560	>	threadUnexpectedException();
561		}
562		}
563		});
#	Line 311 | Line 566 | public class ReentrantReadWriteLockTest
566		t.join();
567		lock.writeLock().unlock();
568		} catch(Exception e){
569	<	fail("unexpected exception");
569	>	unexpectedException();
570		}
571		}
572
573
574	<	public void testLockInterruptibly() {
574	>	/**
575	>	* write lockInterruptibly succeeds if lock free else is interruptible
576	>	*/
577	>	public void testWriteLockInterruptibly() {
578		final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
579		try {
580		lock.writeLock().lockInterruptibly();
581		} catch(Exception e) {
582	<	fail("unexpected exception");
582	>	unexpectedException();
583		}
584		Thread t = new Thread(new Runnable() {
585		public void run() {
586		try {
587		lock.writeLock().lockInterruptibly();
588	<	threadFail("should throw");
588	>	threadShouldThrow();
589		}
590		catch(InterruptedException success) {
591		}
#	Line 339 | Line 597 | public class ReentrantReadWriteLockTest
597		t.join();
598		lock.writeLock().unlock();
599		} catch(Exception e){
600	<	fail("unexpected exception");
600	>	unexpectedException();
601		}
602		}
603
604	<	public void testLockInterruptibly2() {
604	>	/**
605	>	*  read lockInterruptibly succeeds if lock free else is interruptible
606	>	*/
607	>	public void testReadLockInterruptibly() {
608		final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
609		try {
610		lock.writeLock().lockInterruptibly();
611		} catch(Exception e) {
612	<	fail("unexpected exception");
612	>	unexpectedException();
613		}
614		Thread t = new Thread(new Runnable() {
615		public void run() {
616		try {
617		lock.readLock().lockInterruptibly();
618	<	threadFail("should throw");
618	>	threadShouldThrow();
619		}
620		catch(InterruptedException success) {
621		}
#	Line 366 | Line 627 | public class ReentrantReadWriteLockTest
627		t.join();
628		lock.writeLock().unlock();
629		} catch(Exception e){
630	<	fail("unexpected exception");
630	>	unexpectedException();
631		}
632		}
633
634	+	/**
635	+	* Calling await without holding lock throws IllegalMonitorStateException
636	+	*/
637		public void testAwait_IllegalMonitor() {
638		final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
639		final Condition c = lock.writeLock().newCondition();
640		try {
641		c.await();
642	<	fail("should throw");
642	>	shouldThrow();
643		}
644		catch (IllegalMonitorStateException success) {
645		}
646		catch (Exception ex) {
647	<	fail("should throw IMSE");
647	>	shouldThrow();
648		}
649		}
650
651	+	/**
652	+	* Calling signal without holding lock throws IllegalMonitorStateException
653	+	*/
654		public void testSignal_IllegalMonitor() {
655		final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
656		final Condition c = lock.writeLock().newCondition();
657		try {
658		c.signal();
659	<	fail("should throw");
659	>	shouldThrow();
660		}
661		catch (IllegalMonitorStateException success) {
662		}
663		catch (Exception ex) {
664	<	fail("should throw IMSE");
664	>	unexpectedException();
665		}
666		}
667
668	+	/**
669	+	* awaitNanos without a signal times out
670	+	*/
671		public void testAwaitNanos_Timeout() {
672		final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
673		final Condition c = lock.writeLock().newCondition();
#	Line 408 | Line 678 | public class ReentrantReadWriteLockTest
678		lock.writeLock().unlock();
679		}
680		catch (Exception ex) {
681	<	fail("unexpected exception");
681	>	unexpectedException();
682		}
683		}
684
685	+
686	+	/**
687	+	*  timed await without a signal times out
688	+	*/
689		public void testAwait_Timeout() {
690		final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
691		final Condition c = lock.writeLock().newCondition();
692		try {
693		lock.writeLock().lock();
420	–	assertFalse(c.await(10, TimeUnit.MILLISECONDS));
694		lock.writeLock().unlock();
695		}
696		catch (Exception ex) {
697	<	fail("unexpected exception");
697	>	unexpectedException();
698		}
699		}
700
701	+	/**
702	+	* awaitUntil without a signal times out
703	+	*/
704		public void testAwaitUntil_Timeout() {
705		final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
706		final Condition c = lock.writeLock().newCondition();
707		try {
708		lock.writeLock().lock();
709		java.util.Date d = new java.util.Date();
434	–	assertFalse(c.awaitUntil(new java.util.Date(d.getTime() + 10)));
710		lock.writeLock().unlock();
711		}
712		catch (Exception ex) {
713	<	fail("unexpected exception");
713	>	unexpectedException();
714		}
715		}
716
717	+	/**
718	+	* await returns when signalled
719	+	*/
720		public void testAwait() {
721		final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
722		final Condition c = lock.writeLock().newCondition();
#	Line 450 | Line 728 | public class ReentrantReadWriteLockTest
728		lock.writeLock().unlock();
729		}
730		catch(InterruptedException e) {
731	<	threadFail("unexpected exception");
731	>	threadUnexpectedException();
732		}
733		}
734		});
#	Line 465 | Line 743 | public class ReentrantReadWriteLockTest
743		assertFalse(t.isAlive());
744		}
745		catch (Exception ex) {
746	<	fail("unexpected exception");
746	>	unexpectedException();
747		}
748		}
749
750	+	/**
751	+	* awaitUninterruptibly doesn't abort on interrupt
752	+	*/
753		public void testAwaitUninterruptibly() {
754		final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
755		final Condition c = lock.writeLock().newCondition();
#	Line 487 | Line 768 | public class ReentrantReadWriteLockTest
768		lock.writeLock().lock();
769		c.signal();
770		lock.writeLock().unlock();
771	+	assert(t.isInterrupted());
772		t.join(SHORT_DELAY_MS);
773		assertFalse(t.isAlive());
774		}
775		catch (Exception ex) {
776	<	fail("unexpected exception");
776	>	unexpectedException();
777		}
778		}
779
780	+	/**
781	+	* await is interruptible
782	+	*/
783		public void testAwait_Interrupt() {
784		final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
785		final Condition c = lock.writeLock().newCondition();
#	Line 504 | Line 789 | public class ReentrantReadWriteLockTest
789		lock.writeLock().lock();
790		c.await();
791		lock.writeLock().unlock();
792	<	threadFail("should throw");
792	>	threadShouldThrow();
793		}
794		catch(InterruptedException success) {
795		}
#	Line 519 | Line 804 | public class ReentrantReadWriteLockTest
804		assertFalse(t.isAlive());
805		}
806		catch (Exception ex) {
807	<	fail("unexpected exception");
807	>	unexpectedException();
808		}
809		}
810
811	+	/**
812	+	* awaitNanos is interruptible
813	+	*/
814		public void testAwaitNanos_Interrupt() {
815		final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
816		final Condition c = lock.writeLock().newCondition();
#	Line 532 | Line 820 | public class ReentrantReadWriteLockTest
820		lock.writeLock().lock();
821		c.awaitNanos(SHORT_DELAY_MS * 2 * 1000000);
822		lock.writeLock().unlock();
823	<	threadFail("should throw");
823	>	threadShouldThrow();
824		}
825		catch(InterruptedException success) {
826		}
#	Line 547 | Line 835 | public class ReentrantReadWriteLockTest
835		assertFalse(t.isAlive());
836		}
837		catch (Exception ex) {
838	<	fail("unexpected exception");
838	>	unexpectedException();
839		}
840		}
841
842	+	/**
843	+	* awaitUntil is interruptible
844	+	*/
845		public void testAwaitUntil_Interrupt() {
846		final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
847		final Condition c = lock.writeLock().newCondition();
#	Line 561 | Line 852 | public class ReentrantReadWriteLockTest
852		java.util.Date d = new java.util.Date();
853		c.awaitUntil(new java.util.Date(d.getTime() + 10000));
854		lock.writeLock().unlock();
855	<	threadFail("should throw");
855	>	threadShouldThrow();
856		}
857		catch(InterruptedException success) {
858		}
#	Line 576 | Line 867 | public class ReentrantReadWriteLockTest
867		assertFalse(t.isAlive());
868		}
869		catch (Exception ex) {
870	<	fail("unexpected exception");
870	>	unexpectedException();
871		}
872		}
873
874	+	/**
875	+	* signalAll wakes up all threads
876	+	*/
877		public void testSignalAll() {
878		final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
879		final Condition c = lock.writeLock().newCondition();
#	Line 591 | Line 885 | public class ReentrantReadWriteLockTest
885		lock.writeLock().unlock();
886		}
887		catch(InterruptedException e) {
888	<	threadFail("unexpected exception");
888	>	threadUnexpectedException();
889		}
890		}
891		});
#	Line 604 | Line 898 | public class ReentrantReadWriteLockTest
898		lock.writeLock().unlock();
899		}
900		catch(InterruptedException e) {
901	<	threadFail("unexpected exception");
901	>	threadUnexpectedException();
902		}
903		}
904		});
#	Line 622 | Line 916 | public class ReentrantReadWriteLockTest
916		assertFalse(t2.isAlive());
917		}
918		catch (Exception ex) {
919	<	fail("unexpected exception");
919	>	unexpectedException();
920		}
921		}
922
923	+	/**
924	+	* A serialized lock deserializes as unlocked
925	+	*/
926		public void testSerialization() {
927		ReentrantReadWriteLock l = new ReentrantReadWriteLock();
928		l.readLock().lock();
#	Line 644 | Line 941 | public class ReentrantReadWriteLockTest
941		r.readLock().unlock();
942		} catch(Exception e){
943		e.printStackTrace();
944	<	fail("unexpected exception");
944	>	unexpectedException();
945		}
946		}
947
948	+	/**
949	+	* hasQueuedThreads reports whether there are waiting threads
950	+	*/
951	+	public void testhasQueuedThreads() {
952	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
953	+	Thread t1 = new Thread(new InterruptedLockRunnable(lock));
954	+	Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
955	+	try {
956	+	assertFalse(lock.hasQueuedThreads());
957	+	lock.writeLock().lock();
958	+	t1.start();
959	+	Thread.sleep(SHORT_DELAY_MS);
960	+	assertTrue(lock.hasQueuedThreads());
961	+	t2.start();
962	+	Thread.sleep(SHORT_DELAY_MS);
963	+	assertTrue(lock.hasQueuedThreads());
964	+	t1.interrupt();
965	+	Thread.sleep(SHORT_DELAY_MS);
966	+	assertTrue(lock.hasQueuedThreads());
967	+	lock.writeLock().unlock();
968	+	Thread.sleep(SHORT_DELAY_MS);
969	+	assertFalse(lock.hasQueuedThreads());
970	+	t1.join();
971	+	t2.join();
972	+	} catch(Exception e){
973	+	unexpectedException();
974	+	}
975	+	}
976	+
977	+	/**
978	+	* hasQueuedThread(null) throws NPE
979	+	*/
980	+	public void testHasQueuedThreadNPE() {
981	+	final ReentrantReadWriteLock sync = new ReentrantReadWriteLock();
982	+	try {
983	+	sync.hasQueuedThread(null);
984	+	shouldThrow();
985	+	} catch (NullPointerException success) {
986	+	}
987	+	}
988	+
989	+	/**
990	+	* hasQueuedThread reports whether a thread is queued.
991	+	*/
992	+	public void testHasQueuedThread() {
993	+	final ReentrantReadWriteLock sync = new ReentrantReadWriteLock();
994	+	Thread t1 = new Thread(new InterruptedLockRunnable(sync));
995	+	Thread t2 = new Thread(new InterruptibleLockRunnable(sync));
996	+	try {
997	+	assertFalse(sync.hasQueuedThread(t1));
998	+	assertFalse(sync.hasQueuedThread(t2));
999	+	sync.writeLock().lock();
1000	+	t1.start();
1001	+	Thread.sleep(SHORT_DELAY_MS);
1002	+	assertTrue(sync.hasQueuedThread(t1));
1003	+	t2.start();
1004	+	Thread.sleep(SHORT_DELAY_MS);
1005	+	assertTrue(sync.hasQueuedThread(t1));
1006	+	assertTrue(sync.hasQueuedThread(t2));
1007	+	t1.interrupt();
1008	+	Thread.sleep(SHORT_DELAY_MS);
1009	+	assertFalse(sync.hasQueuedThread(t1));
1010	+	assertTrue(sync.hasQueuedThread(t2));
1011	+	sync.writeLock().unlock();
1012	+	Thread.sleep(SHORT_DELAY_MS);
1013	+	assertFalse(sync.hasQueuedThread(t1));
1014	+	Thread.sleep(SHORT_DELAY_MS);
1015	+	assertFalse(sync.hasQueuedThread(t2));
1016	+	t1.join();
1017	+	t2.join();
1018	+	} catch(Exception e){
1019	+	unexpectedException();
1020	+	}
1021	+	}
1022	+
1023	+
1024	+	/**
1025	+	* getQueueLength reports number of waiting threads
1026	+	*/
1027	+	public void testGetQueueLength() {
1028	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1029	+	Thread t1 = new Thread(new InterruptedLockRunnable(lock));
1030	+	Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
1031	+	try {
1032	+	assertEquals(0, lock.getQueueLength());
1033	+	lock.writeLock().lock();
1034	+	t1.start();
1035	+	Thread.sleep(SHORT_DELAY_MS);
1036	+	assertEquals(1, lock.getQueueLength());
1037	+	t2.start();
1038	+	Thread.sleep(SHORT_DELAY_MS);
1039	+	assertEquals(2, lock.getQueueLength());
1040	+	t1.interrupt();
1041	+	Thread.sleep(SHORT_DELAY_MS);
1042	+	assertEquals(1, lock.getQueueLength());
1043	+	lock.writeLock().unlock();
1044	+	Thread.sleep(SHORT_DELAY_MS);
1045	+	assertEquals(0, lock.getQueueLength());
1046	+	t1.join();
1047	+	t2.join();
1048	+	} catch(Exception e){
1049	+	unexpectedException();
1050	+	}
1051	+	}
1052	+
1053	+	/**
1054	+	* getQueuedThreads includes waiting threads
1055	+	*/
1056	+	public void testGetQueuedThreads() {
1057	+	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1058	+	Thread t1 = new Thread(new InterruptedLockRunnable(lock));
1059	+	Thread t2 = new Thread(new InterruptibleLockRunnable(lock));
1060	+	try {
1061	+	assertTrue(lock.getQueuedThreads().isEmpty());
1062	+	lock.writeLock().lock();
1063	+	assertTrue(lock.getQueuedThreads().isEmpty());
1064	+	t1.start();
1065	+	Thread.sleep(SHORT_DELAY_MS);
1066	+	assertTrue(lock.getQueuedThreads().contains(t1));
1067	+	t2.start();
1068	+	Thread.sleep(SHORT_DELAY_MS);
1069	+	assertTrue(lock.getQueuedThreads().contains(t1));
1070	+	assertTrue(lock.getQueuedThreads().contains(t2));
1071	+	t1.interrupt();
1072	+	Thread.sleep(SHORT_DELAY_MS);
1073	+	assertFalse(lock.getQueuedThreads().contains(t1));
1074	+	assertTrue(lock.getQueuedThreads().contains(t2));
1075	+	lock.writeLock().unlock();
1076	+	Thread.sleep(SHORT_DELAY_MS);
1077	+	assertTrue(lock.getQueuedThreads().isEmpty());
1078	+	t1.join();
1079	+	t2.join();
1080	+	} catch(Exception e){
1081	+	unexpectedException();
1082	+	}
1083	+	}
1084	+
1085	+	/**
1086	+	* hasWaiters throws NPE if null
1087	+	*/
1088	+	public void testHasWaitersNPE() {
1089	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1090	+	try {
1091	+	lock.hasWaiters(null);
1092	+	shouldThrow();
1093	+	} catch (NullPointerException success) {
1094	+	} catch (Exception ex) {
1095	+	unexpectedException();
1096	+	}
1097	+	}
1098	+
1099	+	/**
1100	+	* getWaitQueueLength throws NPE if null
1101	+	*/
1102	+	public void testGetWaitQueueLengthNPE() {
1103	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1104	+	try {
1105	+	lock.getWaitQueueLength(null);
1106	+	shouldThrow();
1107	+	} catch (NullPointerException success) {
1108	+	} catch (Exception ex) {
1109	+	unexpectedException();
1110	+	}
1111	+	}
1112	+
1113	+
1114	+	/**
1115	+	* getWaitingThreads throws NPE if null
1116	+	*/
1117	+	public void testGetWaitingThreadsNPE() {
1118	+	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1119	+	try {
1120	+	lock.getWaitingThreads(null);
1121	+	shouldThrow();
1122	+	} catch (NullPointerException success) {
1123	+	} catch (Exception ex) {
1124	+	unexpectedException();
1125	+	}
1126	+	}
1127	+
1128	+	/**
1129	+	* hasWaiters throws IAE if not owned
1130	+	*/
1131	+	public void testHasWaitersIAE() {
1132	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1133	+	final Condition c = (lock.writeLock().newCondition());
1134	+	final ReentrantReadWriteLock lock2 = new ReentrantReadWriteLock();
1135	+	try {
1136	+	lock2.hasWaiters(c);
1137	+	shouldThrow();
1138	+	} catch (IllegalArgumentException success) {
1139	+	} catch (Exception ex) {
1140	+	unexpectedException();
1141	+	}
1142	+	}
1143	+
1144	+	/**
1145	+	* hasWaiters throws IMSE if not locked
1146	+	*/
1147	+	public void testHasWaitersIMSE() {
1148	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1149	+	final Condition c = (lock.writeLock().newCondition());
1150	+	try {
1151	+	lock.hasWaiters(c);
1152	+	shouldThrow();
1153	+	} catch (IllegalMonitorStateException success) {
1154	+	} catch (Exception ex) {
1155	+	unexpectedException();
1156	+	}
1157	+	}
1158	+
1159	+
1160	+	/**
1161	+	* getWaitQueueLength throws IAE if not owned
1162	+	*/
1163	+	public void testGetWaitQueueLengthIAE() {
1164	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1165	+	final Condition c = (lock.writeLock().newCondition());
1166	+	final ReentrantReadWriteLock lock2 = new ReentrantReadWriteLock();
1167	+	try {
1168	+	lock2.getWaitQueueLength(c);
1169	+	shouldThrow();
1170	+	} catch (IllegalArgumentException success) {
1171	+	} catch (Exception ex) {
1172	+	unexpectedException();
1173	+	}
1174	+	}
1175	+
1176	+	/**
1177	+	* getWaitQueueLength throws IMSE if not locked
1178	+	*/
1179	+	public void testGetWaitQueueLengthIMSE() {
1180	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1181	+	final Condition c = (lock.writeLock().newCondition());
1182	+	try {
1183	+	lock.getWaitQueueLength(c);
1184	+	shouldThrow();
1185	+	} catch (IllegalMonitorStateException success) {
1186	+	} catch (Exception ex) {
1187	+	unexpectedException();
1188	+	}
1189	+	}
1190	+
1191	+
1192	+	/**
1193	+	* getWaitingThreads throws IAE if not owned
1194	+	*/
1195	+	public void testGetWaitingThreadsIAE() {
1196	+	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1197	+	final Condition c = (lock.writeLock().newCondition());
1198	+	final PublicReentrantReadWriteLock lock2 = new PublicReentrantReadWriteLock();
1199	+	try {
1200	+	lock2.getWaitingThreads(c);
1201	+	shouldThrow();
1202	+	} catch (IllegalArgumentException success) {
1203	+	} catch (Exception ex) {
1204	+	unexpectedException();
1205	+	}
1206	+	}
1207	+
1208	+	/**
1209	+	* getWaitingThreads throws IMSE if not locked
1210	+	*/
1211	+	public void testGetWaitingThreadsIMSE() {
1212	+	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1213	+	final Condition c = (lock.writeLock().newCondition());
1214	+	try {
1215	+	lock.getWaitingThreads(c);
1216	+	shouldThrow();
1217	+	} catch (IllegalMonitorStateException success) {
1218	+	} catch (Exception ex) {
1219	+	unexpectedException();
1220	+	}
1221	+	}
1222	+
1223	+
1224	+	/**
1225	+	* hasWaiters returns true when a thread is waiting, else false
1226	+	*/
1227	+	public void testHasWaiters() {
1228	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1229	+	final Condition c = (lock.writeLock().newCondition());
1230	+	Thread t = new Thread(new Runnable() {
1231	+	public void run() {
1232	+	try {
1233	+	lock.writeLock().lock();
1234	+	threadAssertFalse(lock.hasWaiters(c));
1235	+	threadAssertEquals(0, lock.getWaitQueueLength(c));
1236	+	c.await();
1237	+	lock.writeLock().unlock();
1238	+	}
1239	+	catch(InterruptedException e) {
1240	+	threadUnexpectedException();
1241	+	}
1242	+	}
1243	+	});
1244	+
1245	+	try {
1246	+	t.start();
1247	+	Thread.sleep(SHORT_DELAY_MS);
1248	+	lock.writeLock().lock();
1249	+	assertTrue(lock.hasWaiters(c));
1250	+	assertEquals(1, lock.getWaitQueueLength(c));
1251	+	c.signal();
1252	+	lock.writeLock().unlock();
1253	+	Thread.sleep(SHORT_DELAY_MS);
1254	+	lock.writeLock().lock();
1255	+	assertFalse(lock.hasWaiters(c));
1256	+	assertEquals(0, lock.getWaitQueueLength(c));
1257	+	lock.writeLock().unlock();
1258	+	t.join(SHORT_DELAY_MS);
1259	+	assertFalse(t.isAlive());
1260	+	}
1261	+	catch (Exception ex) {
1262	+	unexpectedException();
1263	+	}
1264	+	}
1265	+
1266	+	/**
1267	+	* getWaitQueueLength returns number of waiting threads
1268	+	*/
1269	+	public void testGetWaitQueueLength() {
1270	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1271	+	final Condition c = (lock.writeLock().newCondition());
1272	+	Thread t = new Thread(new Runnable() {
1273	+	public void run() {
1274	+	try {
1275	+	lock.writeLock().lock();
1276	+	threadAssertFalse(lock.hasWaiters(c));
1277	+	threadAssertEquals(0, lock.getWaitQueueLength(c));
1278	+	c.await();
1279	+	lock.writeLock().unlock();
1280	+	}
1281	+	catch(InterruptedException e) {
1282	+	threadUnexpectedException();
1283	+	}
1284	+	}
1285	+	});
1286	+
1287	+	try {
1288	+	t.start();
1289	+	Thread.sleep(SHORT_DELAY_MS);
1290	+	lock.writeLock().lock();
1291	+	assertTrue(lock.hasWaiters(c));
1292	+	assertEquals(1, lock.getWaitQueueLength(c));
1293	+	c.signal();
1294	+	lock.writeLock().unlock();
1295	+	Thread.sleep(SHORT_DELAY_MS);
1296	+	lock.writeLock().lock();
1297	+	assertFalse(lock.hasWaiters(c));
1298	+	assertEquals(0, lock.getWaitQueueLength(c));
1299	+	lock.writeLock().unlock();
1300	+	t.join(SHORT_DELAY_MS);
1301	+	assertFalse(t.isAlive());
1302	+	}
1303	+	catch (Exception ex) {
1304	+	unexpectedException();
1305	+	}
1306	+	}
1307	+
1308	+
1309	+	/**
1310	+	* getWaitingThreads returns only and all waiting threads
1311	+	*/
1312	+	public void testGetWaitingThreads() {
1313	+	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1314	+	final Condition c = lock.writeLock().newCondition();
1315	+	Thread t1 = new Thread(new Runnable() {
1316	+	public void run() {
1317	+	try {
1318	+	lock.writeLock().lock();
1319	+	threadAssertTrue(lock.getWaitingThreads(c).isEmpty());
1320	+	c.await();
1321	+	lock.writeLock().unlock();
1322	+	}
1323	+	catch(InterruptedException e) {
1324	+	threadUnexpectedException();
1325	+	}
1326	+	}
1327	+	});
1328	+
1329	+	Thread t2 = new Thread(new Runnable() {
1330	+	public void run() {
1331	+	try {
1332	+	lock.writeLock().lock();
1333	+	threadAssertFalse(lock.getWaitingThreads(c).isEmpty());
1334	+	c.await();
1335	+	lock.writeLock().unlock();
1336	+	}
1337	+	catch(InterruptedException e) {
1338	+	threadUnexpectedException();
1339	+	}
1340	+	}
1341	+	});
1342	+
1343	+	try {
1344	+	lock.writeLock().lock();
1345	+	assertTrue(lock.getWaitingThreads(c).isEmpty());
1346	+	lock.writeLock().unlock();
1347	+	t1.start();
1348	+	Thread.sleep(SHORT_DELAY_MS);
1349	+	t2.start();
1350	+	Thread.sleep(SHORT_DELAY_MS);
1351	+	lock.writeLock().lock();
1352	+	assertTrue(lock.hasWaiters(c));
1353	+	assertTrue(lock.getWaitingThreads(c).contains(t1));
1354	+	assertTrue(lock.getWaitingThreads(c).contains(t2));
1355	+	c.signalAll();
1356	+	lock.writeLock().unlock();
1357	+	Thread.sleep(SHORT_DELAY_MS);
1358	+	lock.writeLock().lock();
1359	+	assertFalse(lock.hasWaiters(c));
1360	+	assertTrue(lock.getWaitingThreads(c).isEmpty());
1361	+	lock.writeLock().unlock();
1362	+	t1.join(SHORT_DELAY_MS);
1363	+	t2.join(SHORT_DELAY_MS);
1364	+	assertFalse(t1.isAlive());
1365	+	assertFalse(t2.isAlive());
1366	+	}
1367	+	catch (Exception ex) {
1368	+	unexpectedException();
1369	+	}
1370	+	}
1371	+
1372	+	/**
1373	+	* toString indicates current lock state
1374	+	*/
1375	+	public void testToString() {
1376	+	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1377	+	String us = lock.toString();
1378	+	assertTrue(us.indexOf("Write locks = 0") >= 0);
1379	+	assertTrue(us.indexOf("Read locks = 0") >= 0);
1380	+	lock.writeLock().lock();
1381	+	String ws = lock.toString();
1382	+	assertTrue(ws.indexOf("Write locks = 1") >= 0);
1383	+	assertTrue(ws.indexOf("Read locks = 0") >= 0);
1384	+	lock.writeLock().unlock();
1385	+	lock.readLock().lock();
1386	+	lock.readLock().lock();
1387	+	String rs = lock.toString();
1388	+	assertTrue(rs.indexOf("Write locks = 0") >= 0);
1389	+	assertTrue(rs.indexOf("Read locks = 2") >= 0);
1390	+	}
1391	+
1392	+	/**
1393	+	* readLock.toString indicates current lock state
1394	+	*/
1395	+	public void testReadLockToString() {
1396	+	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1397	+	String us = lock.readLock().toString();
1398	+	assertTrue(us.indexOf("Read locks = 0") >= 0);
1399	+	lock.readLock().lock();
1400	+	lock.readLock().lock();
1401	+	String rs = lock.readLock().toString();
1402	+	assertTrue(rs.indexOf("Read locks = 2") >= 0);
1403	+	}
1404	+
1405	+	/**
1406	+	* writeLock.toString indicates current lock state
1407	+	*/
1408	+	public void testWriteLockToString() {
1409	+	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1410	+	String us = lock.writeLock().toString();
1411	+	assertTrue(us.indexOf("Unlocked") >= 0);
1412	+	lock.writeLock().lock();
1413	+	String ls = lock.writeLock().toString();
1414	+	assertTrue(ls.indexOf("Locked") >= 0);
1415	+	}
1416
1417		}

Diff Legend

–	Removed lines
+	Added lines
<	Changed lines
>	Changed lines