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 1.13 by dl, Sun Dec 28 21:56:18 2003 UTC vs.
Revision 1.25 by dl, Sun Jan 29 21:17:38 2006 UTC

#	Line 84 | Line 84 | public class ReentrantReadWriteLockTest
84		rl.writeLock().lock();
85		assertTrue(rl.isWriteLocked());
86		assertTrue(rl.isWriteLockedByCurrentThread());
87	+	assertTrue(rl.writeLock().isHeldByCurrentThread());
88		assertEquals(0, rl.getReadLockCount());
89		rl.writeLock().unlock();
90		assertFalse(rl.isWriteLocked());
91		assertFalse(rl.isWriteLockedByCurrentThread());
92	+	assertFalse(rl.writeLock().isHeldByCurrentThread());
93		assertEquals(0, rl.getReadLockCount());
94		rl.readLock().lock();
95		assertFalse(rl.isWriteLocked());
#	Line 108 | Line 110 | public class ReentrantReadWriteLockTest
110		rl.writeLock().lock();
111		assertTrue(rl.isWriteLocked());
112		assertTrue(rl.isWriteLockedByCurrentThread());
113	+	assertTrue(rl.writeLock().isHeldByCurrentThread());
114		assertEquals(0, rl.getReadLockCount());
115		rl.writeLock().unlock();
116		assertFalse(rl.isWriteLocked());
117		assertFalse(rl.isWriteLockedByCurrentThread());
118	+	assertFalse(rl.writeLock().isHeldByCurrentThread());
119		assertEquals(0, rl.getReadLockCount());
120		rl.readLock().lock();
121		assertFalse(rl.isWriteLocked());
#	Line 126 | Line 130 | public class ReentrantReadWriteLockTest
130		/**
131		* getWriteHoldCount returns number of recursive holds
132		*/
133	<	public void testGetHoldCount() {
133	>	public void testGetWriteHoldCount() {
134		ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
135		for(int i = 1; i <= SIZE; i++) {
136		lock.writeLock().lock();
#	Line 137 | Line 141 | public class ReentrantReadWriteLockTest
141		assertEquals(i-1,lock.getWriteHoldCount());
142		}
143		}
144	+
145	+	/**
146	+	* WriteLock.getHoldCount returns number of recursive holds
147	+	*/
148	+	public void testGetHoldCount() {
149	+	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
150	+	for(int i = 1; i <= SIZE; i++) {
151	+	lock.writeLock().lock();
152	+	assertEquals(i,lock.writeLock().getHoldCount());
153	+	}
154	+	for(int i = SIZE; i > 0; i--) {
155	+	lock.writeLock().unlock();
156	+	assertEquals(i-1,lock.writeLock().getHoldCount());
157	+	}
158	+	}
159	+
160	+	/**
161	+	* getReadHoldCount returns number of recursive holds
162	+	*/
163	+	public void testGetReadHoldCount() {
164	+	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
165	+	for(int i = 1; i <= SIZE; i++) {
166	+	lock.readLock().lock();
167	+	assertEquals(i,lock.getReadHoldCount());
168	+	}
169	+	for(int i = SIZE; i > 0; i--) {
170	+	lock.readLock().unlock();
171	+	assertEquals(i-1,lock.getReadHoldCount());
172	+	}
173	+	}
174
175
176		/**
#	Line 156 | Line 190 | public class ReentrantReadWriteLockTest
190		*/
191		public void testWriteLockInterruptibly_Interrupted() {
192		final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
159	–	lock.writeLock().lock();
193		Thread t = new Thread(new Runnable() {
194		public void run() {
195		try {
196		lock.writeLock().lockInterruptibly();
197	<	threadShouldThrow();
197	>	lock.writeLock().unlock();
198	>	lock.writeLock().lockInterruptibly();
199	>	lock.writeLock().unlock();
200		} catch(InterruptedException success){}
201		}
202		});
203		try {
204	+	lock.writeLock().lock();
205		t.start();
206		t.interrupt();
207		lock.writeLock().unlock();
#	Line 176 | Line 212 | public class ReentrantReadWriteLockTest
212		}
213
214		/**
215	<	* timed write-trylock is interruptible
215	>	* timed write-tryLock is interruptible
216		*/
217		public void testWriteTryLock_Interrupted() {
218		final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
#	Line 185 | Line 221 | public class ReentrantReadWriteLockTest
221		public void run() {
222		try {
223		lock.writeLock().tryLock(1000,TimeUnit.MILLISECONDS);
188	–	threadShouldThrow();
224		} catch(InterruptedException success){}
225		}
226		});
#	Line 209 | Line 244 | public class ReentrantReadWriteLockTest
244		public void run() {
245		try {
246		lock.readLock().lockInterruptibly();
212	–	threadShouldThrow();
247		} catch(InterruptedException success){}
248		}
249		});
#	Line 224 | Line 258 | public class ReentrantReadWriteLockTest
258		}
259
260		/**
261	<	* timed read-trylock is interruptible
261	>	* timed read-tryLock is interruptible
262		*/
263		public void testReadTryLock_Interrupted() {
264		final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
#	Line 248 | Line 282 | public class ReentrantReadWriteLockTest
282
283
284		/**
285	<	* write-trylock fails if locked
285	>	* write-tryLock fails if locked
286		*/
287		public void testWriteTryLockWhenLocked() {
288		final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
#	Line 268 | Line 302 | public class ReentrantReadWriteLockTest
302		}
303
304		/**
305	<	* read-trylock fails if locked
305	>	* read-tryLock fails if locked
306		*/
307		public void testReadTryLockWhenLocked() {
308		final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
#	Line 376 | Line 410 | public class ReentrantReadWriteLockTest
410		}
411		}
412
413	+	/**
414	+	* Read trylock succeeds if write locked by current thread
415	+	*/
416	+	public void testReadHoldingWriteLock() {
417	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
418	+	lock.writeLock().lock();
419	+	assertTrue(lock.readLock().tryLock());
420	+	lock.readLock().unlock();
421	+	lock.writeLock().unlock();
422	+	}
423
424		/**
425	<	* Read trylock succeeds if readlocked but not writelocked
425	>	* Read lock succeeds if write locked by current thread even if
426	>	* other threads are waiting for readlock
427	>	*/
428	>	public void testReadHoldingWriteLock2() {
429	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
430	>	lock.writeLock().lock();
431	>	Thread t1 = new Thread(new Runnable() {
432	>	public void run() {
433	>	lock.readLock().lock();
434	>	lock.readLock().unlock();
435	>	}
436	>	});
437	>	Thread t2 = new Thread(new Runnable() {
438	>	public void run() {
439	>	lock.readLock().lock();
440	>	lock.readLock().unlock();
441	>	}
442	>	});
443	>
444	>	try {
445	>	t1.start();
446	>	t2.start();
447	>	lock.readLock().lock();
448	>	lock.readLock().unlock();
449	>	Thread.sleep(SHORT_DELAY_MS);
450	>	lock.readLock().lock();
451	>	lock.readLock().unlock();
452	>	lock.writeLock().unlock();
453	>	t1.join(MEDIUM_DELAY_MS);
454	>	t2.join(MEDIUM_DELAY_MS);
455	>	assertTrue(!t1.isAlive());
456	>	assertTrue(!t2.isAlive());
457	>
458	>	} catch(Exception e){
459	>	unexpectedException();
460	>	}
461	>	}
462	>
463	>	/**
464	>	*  Read lock succeeds if write locked by current thread even if
465	>	* other threads are waiting for writelock
466	>	*/
467	>	public void testReadHoldingWriteLock3() {
468	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
469	>	lock.writeLock().lock();
470	>	Thread t1 = new Thread(new Runnable() {
471	>	public void run() {
472	>	lock.writeLock().lock();
473	>	lock.writeLock().unlock();
474	>	}
475	>	});
476	>	Thread t2 = new Thread(new Runnable() {
477	>	public void run() {
478	>	lock.writeLock().lock();
479	>	lock.writeLock().unlock();
480	>	}
481	>	});
482	>
483	>	try {
484	>	t1.start();
485	>	t2.start();
486	>	lock.readLock().lock();
487	>	lock.readLock().unlock();
488	>	Thread.sleep(SHORT_DELAY_MS);
489	>	lock.readLock().lock();
490	>	lock.readLock().unlock();
491	>	lock.writeLock().unlock();
492	>	t1.join(MEDIUM_DELAY_MS);
493	>	t2.join(MEDIUM_DELAY_MS);
494	>	assertTrue(!t1.isAlive());
495	>	assertTrue(!t2.isAlive());
496	>
497	>	} catch(Exception e){
498	>	unexpectedException();
499	>	}
500	>	}
501	>
502	>
503	>	/**
504	>	*  Write lock succeeds if write locked by current thread even if
505	>	* other threads are waiting for writelock
506	>	*/
507	>	public void testWriteHoldingWriteLock4() {
508	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
509	>	lock.writeLock().lock();
510	>	Thread t1 = new Thread(new Runnable() {
511	>	public void run() {
512	>	lock.writeLock().lock();
513	>	lock.writeLock().unlock();
514	>	}
515	>	});
516	>	Thread t2 = new Thread(new Runnable() {
517	>	public void run() {
518	>	lock.writeLock().lock();
519	>	lock.writeLock().unlock();
520	>	}
521	>	});
522	>
523	>	try {
524	>	t1.start();
525	>	t2.start();
526	>	lock.writeLock().lock();
527	>	lock.writeLock().unlock();
528	>	Thread.sleep(SHORT_DELAY_MS);
529	>	lock.writeLock().lock();
530	>	lock.writeLock().unlock();
531	>	lock.writeLock().unlock();
532	>	t1.join(MEDIUM_DELAY_MS);
533	>	t2.join(MEDIUM_DELAY_MS);
534	>	assertTrue(!t1.isAlive());
535	>	assertTrue(!t2.isAlive());
536	>
537	>	} catch(Exception e){
538	>	unexpectedException();
539	>	}
540	>	}
541	>
542	>
543	>	/**
544	>	* Fair Read trylock succeeds if write locked by current thread
545	>	*/
546	>	public void testReadHoldingWriteLockFair() {
547	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
548	>	lock.writeLock().lock();
549	>	assertTrue(lock.readLock().tryLock());
550	>	lock.readLock().unlock();
551	>	lock.writeLock().unlock();
552	>	}
553	>
554	>	/**
555	>	* Fair Read lock succeeds if write locked by current thread even if
556	>	* other threads are waiting for readlock
557	>	*/
558	>	public void testReadHoldingWriteLockFair2() {
559	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
560	>	lock.writeLock().lock();
561	>	Thread t1 = new Thread(new Runnable() {
562	>	public void run() {
563	>	lock.readLock().lock();
564	>	lock.readLock().unlock();
565	>	}
566	>	});
567	>	Thread t2 = new Thread(new Runnable() {
568	>	public void run() {
569	>	lock.readLock().lock();
570	>	lock.readLock().unlock();
571	>	}
572	>	});
573	>
574	>	try {
575	>	t1.start();
576	>	t2.start();
577	>	lock.readLock().lock();
578	>	lock.readLock().unlock();
579	>	Thread.sleep(SHORT_DELAY_MS);
580	>	lock.readLock().lock();
581	>	lock.readLock().unlock();
582	>	lock.writeLock().unlock();
583	>	t1.join(MEDIUM_DELAY_MS);
584	>	t2.join(MEDIUM_DELAY_MS);
585	>	assertTrue(!t1.isAlive());
586	>	assertTrue(!t2.isAlive());
587	>
588	>	} catch(Exception e){
589	>	unexpectedException();
590	>	}
591	>	}
592	>
593	>
594	>	/**
595	>	* Fair Read lock succeeds if write locked by current thread even if
596	>	* other threads are waiting for writelock
597	>	*/
598	>	public void testReadHoldingWriteLockFair3() {
599	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
600	>	lock.writeLock().lock();
601	>	Thread t1 = new Thread(new Runnable() {
602	>	public void run() {
603	>	lock.writeLock().lock();
604	>	lock.writeLock().unlock();
605	>	}
606	>	});
607	>	Thread t2 = new Thread(new Runnable() {
608	>	public void run() {
609	>	lock.writeLock().lock();
610	>	lock.writeLock().unlock();
611	>	}
612	>	});
613	>
614	>	try {
615	>	t1.start();
616	>	t2.start();
617	>	lock.readLock().lock();
618	>	lock.readLock().unlock();
619	>	Thread.sleep(SHORT_DELAY_MS);
620	>	lock.readLock().lock();
621	>	lock.readLock().unlock();
622	>	lock.writeLock().unlock();
623	>	t1.join(MEDIUM_DELAY_MS);
624	>	t2.join(MEDIUM_DELAY_MS);
625	>	assertTrue(!t1.isAlive());
626	>	assertTrue(!t2.isAlive());
627	>
628	>	} catch(Exception e){
629	>	unexpectedException();
630	>	}
631	>	}
632	>
633	>
634	>	/**
635	>	* Fair Write lock succeeds if write locked by current thread even if
636	>	* other threads are waiting for writelock
637	>	*/
638	>	public void testWriteHoldingWriteLockFair4() {
639	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
640	>	lock.writeLock().lock();
641	>	Thread t1 = new Thread(new Runnable() {
642	>	public void run() {
643	>	lock.writeLock().lock();
644	>	lock.writeLock().unlock();
645	>	}
646	>	});
647	>	Thread t2 = new Thread(new Runnable() {
648	>	public void run() {
649	>	lock.writeLock().lock();
650	>	lock.writeLock().unlock();
651	>	}
652	>	});
653	>
654	>	try {
655	>	t1.start();
656	>	t2.start();
657	>	Thread.sleep(SHORT_DELAY_MS);
658	>	assertTrue(lock.isWriteLockedByCurrentThread());
659	>	assertTrue(lock.getWriteHoldCount() == 1);
660	>	lock.writeLock().lock();
661	>	assertTrue(lock.getWriteHoldCount() == 2);
662	>	lock.writeLock().unlock();
663	>	lock.writeLock().lock();
664	>	lock.writeLock().unlock();
665	>	lock.writeLock().unlock();
666	>	t1.join(MEDIUM_DELAY_MS);
667	>	t2.join(MEDIUM_DELAY_MS);
668	>	assertTrue(!t1.isAlive());
669	>	assertTrue(!t2.isAlive());
670	>
671	>	} catch(Exception e){
672	>	unexpectedException();
673	>	}
674	>	}
675	>
676	>
677	>	/**
678	>	* Read tryLock succeeds if readlocked but not writelocked
679		*/
680		public void testTryLockWhenReadLocked() {
681		final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
#	Line 401 | Line 698 | public class ReentrantReadWriteLockTest
698
699
700		/**
701	<	* write trylock fails when readlocked
701	>	* write tryLock fails when readlocked
702		*/
703		public void testWriteTryLockWhenReadLocked() {
704		final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
#	Line 420 | Line 717 | public class ReentrantReadWriteLockTest
717		}
718		}
719
720	+
721	+	/**
722	+	* Fair Read tryLock succeeds if readlocked but not writelocked
723	+	*/
724	+	public void testTryLockWhenReadLockedFair() {
725	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
726	+	lock.readLock().lock();
727	+	Thread t = new Thread(new Runnable() {
728	+	public void run() {
729	+	threadAssertTrue(lock.readLock().tryLock());
730	+	lock.readLock().unlock();
731	+	}
732	+	});
733	+	try {
734	+	t.start();
735	+	t.join();
736	+	lock.readLock().unlock();
737	+	} catch(Exception e){
738	+	unexpectedException();
739	+	}
740	+	}
741	+
742	+
743	+
744	+	/**
745	+	* Fair write tryLock fails when readlocked
746	+	*/
747	+	public void testWriteTryLockWhenReadLockedFair() {
748	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
749	+	lock.readLock().lock();
750	+	Thread t = new Thread(new Runnable() {
751	+	public void run() {
752	+	threadAssertFalse(lock.writeLock().tryLock());
753	+	}
754	+	});
755	+	try {
756	+	t.start();
757	+	t.join();
758	+	lock.readLock().unlock();
759	+	} catch(Exception e){
760	+	unexpectedException();
761	+	}
762	+	}
763	+
764
765
766		/**
767	<	* write timed trylock times out if locked
767	>	* write timed tryLock times out if locked
768		*/
769		public void testWriteTryLock_Timeout() {
770		final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
#	Line 447 | Line 788 | public class ReentrantReadWriteLockTest
788		}
789
790		/**
791	<	* read timed trylock times out if write-locked
791	>	* read timed tryLock times out if write-locked
792		*/
793		public void testReadTryLock_Timeout() {
794		final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
#	Line 591 | Line 932 | public class ReentrantReadWriteLockTest
932		final Condition c = lock.writeLock().newCondition();
933		try {
934		lock.writeLock().lock();
594	–	assertFalse(c.await(10, TimeUnit.MILLISECONDS));
935		lock.writeLock().unlock();
936		}
937		catch (Exception ex) {
#	Line 608 | Line 948 | public class ReentrantReadWriteLockTest
948		try {
949		lock.writeLock().lock();
950		java.util.Date d = new java.util.Date();
611	–	assertFalse(c.awaitUntil(new java.util.Date(d.getTime() + 10)));
951		lock.writeLock().unlock();
952		}
953		catch (Exception ex) {
#	Line 649 | Line 988 | public class ReentrantReadWriteLockTest
988		}
989		}
990
991	+	/** A helper class for uninterruptible wait tests */
992	+	class UninterruptableThread extends Thread {
993	+	private Lock lock;
994	+	private Condition c;
995	+
996	+	public volatile boolean canAwake = false;
997	+	public volatile boolean interrupted = false;
998	+	public volatile boolean lockStarted = false;
999	+
1000	+	public UninterruptableThread(Lock lock, Condition c) {
1001	+	this.lock = lock;
1002	+	this.c = c;
1003	+	}
1004	+
1005	+	public synchronized void run() {
1006	+	lock.lock();
1007	+	lockStarted = true;
1008	+
1009	+	while (!canAwake) {
1010	+	c.awaitUninterruptibly();
1011	+	}
1012	+
1013	+	interrupted = isInterrupted();
1014	+	lock.unlock();
1015	+	}
1016	+	}
1017	+
1018		/**
1019		* awaitUninterruptibly doesn't abort on interrupt
1020		*/
1021		public void testAwaitUninterruptibly() {
1022	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1022	>	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1023		final Condition c = lock.writeLock().newCondition();
1024	<	Thread t = new Thread(new Runnable() {
659	<	public void run() {
660	<	lock.writeLock().lock();
661	<	c.awaitUninterruptibly();
662	<	lock.writeLock().unlock();
663	<	}
664	<	});
1024	>	UninterruptableThread thread = new UninterruptableThread(lock.writeLock(), c);
1025
1026		try {
1027	<	t.start();
1028	<	Thread.sleep(SHORT_DELAY_MS);
1029	<	t.interrupt();
1027	>	thread.start();
1028	>
1029	>	while (!thread.lockStarted) {
1030	>	Thread.sleep(100);
1031	>	}
1032	>
1033		lock.writeLock().lock();
1034	<	c.signal();
1035	<	lock.writeLock().unlock();
1036	<	assert(t.isInterrupted());
1037	<	t.join(SHORT_DELAY_MS);
1038	<	assertFalse(t.isAlive());
1039	<	}
1040	<	catch (Exception ex) {
1034	>	try {
1035	>	thread.interrupt();
1036	>	thread.canAwake = true;
1037	>	c.signal();
1038	>	} finally {
1039	>	lock.writeLock().unlock();
1040	>	}
1041	>
1042	>	thread.join();
1043	>	assertTrue(thread.interrupted);
1044	>	assertFalse(thread.isAlive());
1045	>	} catch (Exception ex) {
1046		unexpectedException();
1047		}
1048		}
#	Line 877 | Line 1245 | public class ReentrantReadWriteLockTest
1245		}
1246
1247		/**
1248	+	* hasQueuedThread(null) throws NPE
1249	+	*/
1250	+	public void testHasQueuedThreadNPE() {
1251	+	final ReentrantReadWriteLock sync = new ReentrantReadWriteLock();
1252	+	try {
1253	+	sync.hasQueuedThread(null);
1254	+	shouldThrow();
1255	+	} catch (NullPointerException success) {
1256	+	}
1257	+	}
1258	+
1259	+	/**
1260	+	* hasQueuedThread reports whether a thread is queued.
1261	+	*/
1262	+	public void testHasQueuedThread() {
1263	+	final ReentrantReadWriteLock sync = new ReentrantReadWriteLock();
1264	+	Thread t1 = new Thread(new InterruptedLockRunnable(sync));
1265	+	Thread t2 = new Thread(new InterruptibleLockRunnable(sync));
1266	+	try {
1267	+	assertFalse(sync.hasQueuedThread(t1));
1268	+	assertFalse(sync.hasQueuedThread(t2));
1269	+	sync.writeLock().lock();
1270	+	t1.start();
1271	+	Thread.sleep(SHORT_DELAY_MS);
1272	+	assertTrue(sync.hasQueuedThread(t1));
1273	+	t2.start();
1274	+	Thread.sleep(SHORT_DELAY_MS);
1275	+	assertTrue(sync.hasQueuedThread(t1));
1276	+	assertTrue(sync.hasQueuedThread(t2));
1277	+	t1.interrupt();
1278	+	Thread.sleep(SHORT_DELAY_MS);
1279	+	assertFalse(sync.hasQueuedThread(t1));
1280	+	assertTrue(sync.hasQueuedThread(t2));
1281	+	sync.writeLock().unlock();
1282	+	Thread.sleep(SHORT_DELAY_MS);
1283	+	assertFalse(sync.hasQueuedThread(t1));
1284	+	Thread.sleep(SHORT_DELAY_MS);
1285	+	assertFalse(sync.hasQueuedThread(t2));
1286	+	t1.join();
1287	+	t2.join();
1288	+	} catch(Exception e){
1289	+	unexpectedException();
1290	+	}
1291	+	}
1292	+
1293	+
1294	+	/**
1295		* getQueueLength reports number of waiting threads
1296		*/
1297		public void testGetQueueLength() {
#	Line 938 | Line 1353 | public class ReentrantReadWriteLockTest
1353		}
1354
1355		/**
1356	+	* hasWaiters throws NPE if null
1357	+	*/
1358	+	public void testHasWaitersNPE() {
1359	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1360	+	try {
1361	+	lock.hasWaiters(null);
1362	+	shouldThrow();
1363	+	} catch (NullPointerException success) {
1364	+	} catch (Exception ex) {
1365	+	unexpectedException();
1366	+	}
1367	+	}
1368	+
1369	+	/**
1370	+	* getWaitQueueLength throws NPE if null
1371	+	*/
1372	+	public void testGetWaitQueueLengthNPE() {
1373	+	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1374	+	try {
1375	+	lock.getWaitQueueLength(null);
1376	+	shouldThrow();
1377	+	} catch (NullPointerException success) {
1378	+	} catch (Exception ex) {
1379	+	unexpectedException();
1380	+	}
1381	+	}
1382	+
1383	+
1384	+	/**
1385	+	* getWaitingThreads throws NPE if null
1386	+	*/
1387	+	public void testGetWaitingThreadsNPE() {
1388	+	final PublicReentrantReadWriteLock lock = new PublicReentrantReadWriteLock();
1389	+	try {
1390	+	lock.getWaitingThreads(null);
1391	+	shouldThrow();
1392	+	} catch (NullPointerException success) {
1393	+	} catch (Exception ex) {
1394	+	unexpectedException();
1395	+	}
1396	+	}
1397	+
1398	+	/**
1399		* hasWaiters throws IAE if not owned
1400		*/
1401		public void testHasWaitersIAE() {
#	Line 1181 | Line 1639 | public class ReentrantReadWriteLockTest
1639		}
1640		}
1641
1642	+	/**
1643	+	* toString indicates current lock state
1644	+	*/
1645	+	public void testToString() {
1646	+	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1647	+	String us = lock.toString();
1648	+	assertTrue(us.indexOf("Write locks = 0") >= 0);
1649	+	assertTrue(us.indexOf("Read locks = 0") >= 0);
1650	+	lock.writeLock().lock();
1651	+	String ws = lock.toString();
1652	+	assertTrue(ws.indexOf("Write locks = 1") >= 0);
1653	+	assertTrue(ws.indexOf("Read locks = 0") >= 0);
1654	+	lock.writeLock().unlock();
1655	+	lock.readLock().lock();
1656	+	lock.readLock().lock();
1657	+	String rs = lock.toString();
1658	+	assertTrue(rs.indexOf("Write locks = 0") >= 0);
1659	+	assertTrue(rs.indexOf("Read locks = 2") >= 0);
1660	+	}
1661	+
1662	+	/**
1663	+	* readLock.toString indicates current lock state
1664	+	*/
1665	+	public void testReadLockToString() {
1666	+	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1667	+	String us = lock.readLock().toString();
1668	+	assertTrue(us.indexOf("Read locks = 0") >= 0);
1669	+	lock.readLock().lock();
1670	+	lock.readLock().lock();
1671	+	String rs = lock.readLock().toString();
1672	+	assertTrue(rs.indexOf("Read locks = 2") >= 0);
1673	+	}
1674	+
1675	+	/**
1676	+	* writeLock.toString indicates current lock state
1677	+	*/
1678	+	public void testWriteLockToString() {
1679	+	ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
1680	+	String us = lock.writeLock().toString();
1681	+	assertTrue(us.indexOf("Unlocked") >= 0);
1682	+	lock.writeLock().lock();
1683	+	String ls = lock.writeLock().toString();
1684	+	assertTrue(ls.indexOf("Locked") >= 0);
1685	+	}
1686	+
1687		}

Diff Legend

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