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

Comparing jsr166/src/test/tck/ReentrantReadWriteLockTest.java (file contents):
Revision 1.60 by jsr166, Mon May 9 20:00:19 2011 UTC vs.
Revision 1.72 by jsr166, Fri Feb 27 22:06:24 2015 UTC

#	Line 6 | Line 6
6		* Pat Fisher, Mike Judd.
7		*/
8
9	–	import junit.framework.*;
10	–	import java.util.concurrent.atomic.AtomicBoolean;
11	–	import java.util.concurrent.locks.*;
12	–	import java.util.concurrent.*;
9		import static java.util.concurrent.TimeUnit.MILLISECONDS;
10	<	import java.io.*;
11	<	import java.util.*;
10	>
11	>	import java.util.Arrays;
12	>	import java.util.Collection;
13	>	import java.util.HashSet;
14	>	import java.util.concurrent.CountDownLatch;
15	>	import java.util.concurrent.atomic.AtomicBoolean;
16	>	import java.util.concurrent.locks.Condition;
17	>	import java.util.concurrent.locks.Lock;
18	>	import java.util.concurrent.locks.ReentrantReadWriteLock;
19	>
20	>	import junit.framework.AssertionFailedError;
21	>	import junit.framework.Test;
22	>	import junit.framework.TestSuite;
23
24		public class ReentrantReadWriteLockTest extends JSR166TestCase {
25		public static void main(String[] args) {
#	Line 67 | Line 74 | public class ReentrantReadWriteLockTest
74		*/
75		void releaseWriteLock(PublicReentrantReadWriteLock lock) {
76		ReentrantReadWriteLock.WriteLock writeLock = lock.writeLock();
77	<	assertWriteLockedBy(lock, Thread.currentThread());
77	>	assertWriteLockedByMoi(lock);
78		assertEquals(1, lock.getWriteHoldCount());
79		writeLock.unlock();
80		assertNotWriteLocked(lock);
#	Line 80 | Line 87 | public class ReentrantReadWriteLockTest
87		long startTime = System.nanoTime();
88		while (!lock.hasQueuedThread(t)) {
89		if (millisElapsedSince(startTime) > LONG_DELAY_MS)
90	<	throw new AssertionError("timed out");
90	>	throw new AssertionFailedError("timed out");
91		Thread.yield();
92		}
93		assertTrue(t.isAlive());
94	<	assertTrue(lock.getOwner() != t);
94	>	assertNotSame(t, lock.getOwner());
95		}
96
97		/**
#	Line 94 | Line 101 | public class ReentrantReadWriteLockTest
101		assertFalse(lock.isWriteLocked());
102		assertFalse(lock.isWriteLockedByCurrentThread());
103		assertFalse(lock.writeLock().isHeldByCurrentThread());
97	–	assertNull(lock.getOwner());
104		assertEquals(0, lock.getWriteHoldCount());
105	+	assertEquals(0, lock.writeLock().getHoldCount());
106	+	assertNull(lock.getOwner());
107		}
108
109		/**
#	Line 110 | Line 118 | public class ReentrantReadWriteLockTest
118		lock.writeLock().isHeldByCurrentThread());
119		assertEquals(t == Thread.currentThread(),
120		lock.getWriteHoldCount() > 0);
121	+	assertEquals(t == Thread.currentThread(),
122	+	lock.writeLock().getHoldCount() > 0);
123		assertEquals(0, lock.getReadLockCount());
124		}
125
126		/**
127	+	* Checks that lock is write-locked by the current thread.
128	+	*/
129	+	void assertWriteLockedByMoi(PublicReentrantReadWriteLock lock) {
130	+	assertWriteLockedBy(lock, Thread.currentThread());
131	+	}
132	+
133	+	/**
134		* Checks that condition c has no waiters.
135		*/
136		void assertHasNoWaiters(PublicReentrantReadWriteLock lock, Condition c) {
#	Line 135 | Line 152 | public class ReentrantReadWriteLockTest
152		lock.writeLock().unlock();
153		}
154
155	<	enum AwaitMethod { await, awaitNanos, awaitUntil };
155	>	enum AwaitMethod { await, awaitTimed, awaitNanos, awaitUntil }
156
157		/**
158	<	* Awaits condition using the specified AwaitMethod
158	>	* Awaits condition using the specified AwaitMethod.
159		*/
160		void await(Condition c, AwaitMethod awaitMethod)
161		throws InterruptedException {
#	Line 146 | Line 163 | public class ReentrantReadWriteLockTest
163		case await:
164		c.await();
165		break;
166	+	case awaitTimed:
167	+	assertTrue(c.await(2 * LONG_DELAY_MS, MILLISECONDS));
168	+	break;
169		case awaitNanos:
170		long nanosRemaining = c.awaitNanos(MILLISECONDS.toNanos(2 * LONG_DELAY_MS));
171		assertTrue(nanosRemaining > 0);
#	Line 154 | Line 174 | public class ReentrantReadWriteLockTest
174		java.util.Date d = new java.util.Date();
175		assertTrue(c.awaitUntil(new java.util.Date(d.getTime() + 2 * LONG_DELAY_MS)));
176		break;
177	+	default:
178	+	throw new AssertionError();
179		}
180		}
181
#	Line 189 | Line 211 | public class ReentrantReadWriteLockTest
211		new PublicReentrantReadWriteLock(fair);
212		assertNotWriteLocked(lock);
213		lock.writeLock().lock();
214	<	assertWriteLockedBy(lock, Thread.currentThread());
214	>	assertWriteLockedByMoi(lock);
215		lock.writeLock().unlock();
216		assertNotWriteLocked(lock);
217		assertEquals(0, lock.getReadLockCount());
#	Line 359 | Line 381 | public class ReentrantReadWriteLockTest
381		}
382
383		/**
384	+	* write-tryLock on an unlocked lock succeeds
385	+	*/
386	+	public void testWriteTryLock()      { testWriteTryLock(false); }
387	+	public void testWriteTryLock_fair() { testWriteTryLock(true); }
388	+	public void testWriteTryLock(boolean fair) {
389	+	final PublicReentrantReadWriteLock lock =
390	+	new PublicReentrantReadWriteLock(fair);
391	+	assertTrue(lock.writeLock().tryLock());
392	+	assertWriteLockedByMoi(lock);
393	+	assertTrue(lock.writeLock().tryLock());
394	+	assertWriteLockedByMoi(lock);
395	+	lock.writeLock().unlock();
396	+	releaseWriteLock(lock);
397	+	}
398	+
399	+	/**
400		* write-tryLock fails if locked
401		*/
402		public void testWriteTryLockWhenLocked()      { testWriteTryLockWhenLocked(false); }
#	Line 478 | Line 516 | public class ReentrantReadWriteLockTest
516
517		/**
518		* A thread that tries to acquire a fair read lock (non-reentrantly)
519	<	* will block if there is a waiting writer thread.
519	>	* will block if there is a waiting writer thread
520		*/
521		public void testReaderWriterReaderFairFifo() {
522		final PublicReentrantReadWriteLock lock =
#	Line 555 | Line 593 | public class ReentrantReadWriteLockTest
593		}
594
595		/**
596	<	* Read trylock succeeds (barging) even in the presence of waiting readers and/or writers.
596	>	* Read trylock succeeds (barging) even in the presence of waiting
597	>	* readers and/or writers
598		*/
599		public void testReadTryLockBarging()      { testReadTryLockBarging(false); }
600		public void testReadTryLockBarging_fair() { testReadTryLockBarging(true); }
#	Line 622 | Line 661 | public class ReentrantReadWriteLockTest
661
662		waitForQueuedThread(lock, t1);
663		waitForQueuedThread(lock, t2);
664	<	assertWriteLockedBy(lock, Thread.currentThread());
664	>	assertWriteLockedByMoi(lock);
665		lock.readLock().lock();
666		lock.readLock().unlock();
667		releaseWriteLock(lock);
#	Line 656 | Line 695 | public class ReentrantReadWriteLockTest
695
696		waitForQueuedThread(lock, t1);
697		waitForQueuedThread(lock, t2);
698	<	assertWriteLockedBy(lock, Thread.currentThread());
698	>	assertWriteLockedByMoi(lock);
699		lock.readLock().lock();
700		lock.readLock().unlock();
701	<	assertWriteLockedBy(lock, Thread.currentThread());
701	>	assertWriteLockedByMoi(lock);
702		lock.writeLock().unlock();
703		awaitTermination(t1);
704		awaitTermination(t2);
#	Line 691 | Line 730 | public class ReentrantReadWriteLockTest
730
731		waitForQueuedThread(lock, t1);
732		waitForQueuedThread(lock, t2);
733	<	assertWriteLockedBy(lock, Thread.currentThread());
733	>	assertWriteLockedByMoi(lock);
734		assertEquals(1, lock.getWriteHoldCount());
735		lock.writeLock().lock();
736	<	assertWriteLockedBy(lock, Thread.currentThread());
736	>	assertWriteLockedByMoi(lock);
737		assertEquals(2, lock.getWriteHoldCount());
738		lock.writeLock().unlock();
739	<	assertWriteLockedBy(lock, Thread.currentThread());
739	>	assertWriteLockedByMoi(lock);
740		assertEquals(1, lock.getWriteHoldCount());
741		lock.writeLock().unlock();
742		awaitTermination(t1);
#	Line 745 | Line 784 | public class ReentrantReadWriteLockTest
784		public void testWriteTryLock_Timeout()      { testWriteTryLock_Timeout(false); }
785		public void testWriteTryLock_Timeout_fair() { testWriteTryLock_Timeout(true); }
786		public void testWriteTryLock_Timeout(boolean fair) {
787	<	final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
787	>	final PublicReentrantReadWriteLock lock =
788	>	new PublicReentrantReadWriteLock(fair);
789		lock.writeLock().lock();
790		Thread t = newStartedThread(new CheckedRunnable() {
791		public void realRun() throws InterruptedException {
#	Line 756 | Line 796 | public class ReentrantReadWriteLockTest
796		}});
797
798		awaitTermination(t);
799	<	assertTrue(lock.writeLock().isHeldByCurrentThread());
760	<	lock.writeLock().unlock();
799	>	releaseWriteLock(lock);
800		}
801
802		/**
#	Line 782 | Line 821 | public class ReentrantReadWriteLockTest
821		}
822
823		/**
824	<	* write lockInterruptibly succeeds if lock free else is interruptible
824	>	* write lockInterruptibly succeeds if unlocked, else is interruptible
825		*/
826		public void testWriteLockInterruptibly()      { testWriteLockInterruptibly(false); }
827		public void testWriteLockInterruptibly_fair() { testWriteLockInterruptibly(true); }
#	Line 791 | Line 830 | public class ReentrantReadWriteLockTest
830		new PublicReentrantReadWriteLock(fair);
831		try {
832		lock.writeLock().lockInterruptibly();
833	<	} catch (Throwable t) {
795	<	threadUnexpectedException(t);
796	<	}
833	>	} catch (InterruptedException fail) { threadUnexpectedException(fail); }
834		Thread t = newStartedThread(new CheckedInterruptedRunnable() {
835		public void realRun() throws InterruptedException {
836		lock.writeLock().lockInterruptibly();
#	Line 801 | Line 838 | public class ReentrantReadWriteLockTest
838
839		waitForQueuedThread(lock, t);
840		t.interrupt();
841	+	assertTrue(lock.writeLock().isHeldByCurrentThread());
842		awaitTermination(t);
843		releaseWriteLock(lock);
844		}
#	Line 817 | Line 855 | public class ReentrantReadWriteLockTest
855		lock.readLock().lockInterruptibly();
856		lock.readLock().unlock();
857		lock.writeLock().lockInterruptibly();
858	<	} catch (Throwable t) {
821	<	threadUnexpectedException(t);
822	<	}
858	>	} catch (InterruptedException fail) { threadUnexpectedException(fail); }
859		Thread t = newStartedThread(new CheckedInterruptedRunnable() {
860		public void realRun() throws InterruptedException {
861		lock.readLock().lockInterruptibly();
#	Line 839 | Line 875 | public class ReentrantReadWriteLockTest
875		public void testAwait_IMSE(boolean fair) {
876		final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
877		final Condition c = lock.writeLock().newCondition();
878	<	long startTime = System.nanoTime();
879	<	try {
844	<	try {
845	<	c.await();
846	<	shouldThrow();
847	<	} catch (IllegalMonitorStateException success) {}
848	<	try {
849	<	c.await(LONG_DELAY_MS, MILLISECONDS);
850	<	shouldThrow();
851	<	} catch (IllegalMonitorStateException success) {}
852	<	try {
853	<	c.awaitNanos(MILLISECONDS.toNanos(LONG_DELAY_MS));
854	<	shouldThrow();
855	<	} catch (IllegalMonitorStateException success) {}
878	>	for (AwaitMethod awaitMethod : AwaitMethod.values()) {
879	>	long startTime = System.nanoTime();
880		try {
881	<	c.awaitUninterruptibly();
881	>	await(c, awaitMethod);
882		shouldThrow();
883	<	} catch (IllegalMonitorStateException success) {}
884	<	} catch (Throwable t) {
885	<	threadUnexpectedException(t);
883	>	} catch (IllegalMonitorStateException success) {
884	>	} catch (InterruptedException fail) {
885	>	threadUnexpectedException(fail);
886	>	}
887	>	assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS);
888		}
863	–	assertTrue(millisElapsedSince(startTime) < MEDIUM_DELAY_MS);
889		}
890
891		/**
#	Line 909 | Line 934 | public class ReentrantReadWriteLockTest
934		assertTrue(nanosRemaining <= 0);
935		assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
936		lock.writeLock().unlock();
937	<	} catch (InterruptedException e) {
913	<	threadUnexpectedException(e);
914	<	}
937	>	} catch (InterruptedException fail) { threadUnexpectedException(fail); }
938		}
939
940		/**
#	Line 930 | Line 953 | public class ReentrantReadWriteLockTest
953		assertFalse(c.await(timeoutMillis, MILLISECONDS));
954		assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
955		lock.writeLock().unlock();
956	<	} catch (InterruptedException e) {
934	<	threadUnexpectedException(e);
935	<	}
956	>	} catch (InterruptedException fail) { threadUnexpectedException(fail); }
957		}
958
959		/**
#	Line 952 | Line 973 | public class ReentrantReadWriteLockTest
973		assertFalse(c.awaitUntil(new java.util.Date(d.getTime() + timeoutMillis)));
974		assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
975		lock.writeLock().unlock();
976	<	} catch (InterruptedException e) {
956	<	threadUnexpectedException(e);
957	<	}
976	>	} catch (InterruptedException fail) { threadUnexpectedException(fail); }
977		}
978
979		/**
#	Line 986 | Line 1005 | public class ReentrantReadWriteLockTest
1005		}
1006
1007		/**
1008	<	* awaitUninterruptibly doesn't abort on interrupt
1008	>	* awaitUninterruptibly is uninterruptible
1009		*/
1010		public void testAwaitUninterruptibly()      { testAwaitUninterruptibly(false); }
1011		public void testAwaitUninterruptibly_fair() { testAwaitUninterruptibly(true); }
1012		public void testAwaitUninterruptibly(boolean fair) {
1013		final ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1014		final Condition c = lock.writeLock().newCondition();
1015	<	final CountDownLatch locked = new CountDownLatch(1);
1016	<	Thread t = newStartedThread(new CheckedRunnable() {
1015	>	final CountDownLatch pleaseInterrupt = new CountDownLatch(2);
1016	>
1017	>	Thread t1 = newStartedThread(new CheckedRunnable() {
1018		public void realRun() {
1019	+	// Interrupt before awaitUninterruptibly
1020		lock.writeLock().lock();
1021	<	locked.countDown();
1021	>	pleaseInterrupt.countDown();
1022	>	Thread.currentThread().interrupt();
1023		c.awaitUninterruptibly();
1024		assertTrue(Thread.interrupted());
1025		lock.writeLock().unlock();
1026		}});
1027
1028	<	await(locked);
1028	>	Thread t2 = newStartedThread(new CheckedRunnable() {
1029	>	public void realRun() {
1030	>	// Interrupt during awaitUninterruptibly
1031	>	lock.writeLock().lock();
1032	>	pleaseInterrupt.countDown();
1033	>	c.awaitUninterruptibly();
1034	>	assertTrue(Thread.interrupted());
1035	>	lock.writeLock().unlock();
1036	>	}});
1037	>
1038	>	await(pleaseInterrupt);
1039		lock.writeLock().lock();
1040		lock.writeLock().unlock();
1041	<	t.interrupt();
1042	<	long timeoutMillis = 10;
1043	<	assertThreadJoinTimesOut(t, timeoutMillis);
1041	>	t2.interrupt();
1042	>
1043	>	assertThreadStaysAlive(t1);
1044	>	assertTrue(t2.isAlive());
1045	>
1046		lock.writeLock().lock();
1047	<	c.signal();
1047	>	c.signalAll();
1048		lock.writeLock().unlock();
1049	<	awaitTermination(t);
1049	>
1050	>	awaitTermination(t1);
1051	>	awaitTermination(t2);
1052		}
1053
1054		/**
#	Line 1020 | Line 1056 | public class ReentrantReadWriteLockTest
1056		*/
1057		public void testInterruptible_await()           { testInterruptible(false, AwaitMethod.await); }
1058		public void testInterruptible_await_fair()      { testInterruptible(true,  AwaitMethod.await); }
1059	+	public void testInterruptible_awaitTimed()      { testInterruptible(false, AwaitMethod.awaitTimed); }
1060	+	public void testInterruptible_awaitTimed_fair() { testInterruptible(true,  AwaitMethod.awaitTimed); }
1061		public void testInterruptible_awaitNanos()      { testInterruptible(false, AwaitMethod.awaitNanos); }
1062		public void testInterruptible_awaitNanos_fair() { testInterruptible(true,  AwaitMethod.awaitNanos); }
1063		public void testInterruptible_awaitUntil()      { testInterruptible(false, AwaitMethod.awaitUntil); }
#	Line 1032 | Line 1070 | public class ReentrantReadWriteLockTest
1070		Thread t = newStartedThread(new CheckedInterruptedRunnable() {
1071		public void realRun() throws InterruptedException {
1072		lock.writeLock().lock();
1073	<	assertWriteLockedBy(lock, Thread.currentThread());
1073	>	assertWriteLockedByMoi(lock);
1074		assertHasNoWaiters(lock, c);
1075		locked.countDown();
1076		try {
1077		await(c, awaitMethod);
1078		} finally {
1079	<	assertWriteLockedBy(lock, Thread.currentThread());
1079	>	assertWriteLockedByMoi(lock);
1080		assertHasNoWaiters(lock, c);
1081		lock.writeLock().unlock();
1082		assertFalse(Thread.interrupted());
#	Line 1057 | Line 1095 | public class ReentrantReadWriteLockTest
1095		*/
1096		public void testSignalAll_await()           { testSignalAll(false, AwaitMethod.await); }
1097		public void testSignalAll_await_fair()      { testSignalAll(true,  AwaitMethod.await); }
1098	+	public void testSignalAll_awaitTimed()      { testSignalAll(false, AwaitMethod.awaitTimed); }
1099	+	public void testSignalAll_awaitTimed_fair() { testSignalAll(true,  AwaitMethod.awaitTimed); }
1100		public void testSignalAll_awaitNanos()      { testSignalAll(false, AwaitMethod.awaitNanos); }
1101		public void testSignalAll_awaitNanos_fair() { testSignalAll(true,  AwaitMethod.awaitNanos); }
1102		public void testSignalAll_awaitUntil()      { testSignalAll(false, AwaitMethod.awaitUntil); }
#	Line 1090 | Line 1130 | public class ReentrantReadWriteLockTest
1130		}
1131
1132		/**
1133	<	* signal wakes up waiting threads in FIFO order.
1133	>	* signal wakes up waiting threads in FIFO order
1134		*/
1135		public void testSignalWakesFifo()      { testSignalWakesFifo(false); }
1136		public void testSignalWakesFifo_fair() { testSignalWakesFifo(true); }
#	Line 1150 | Line 1190 | public class ReentrantReadWriteLockTest
1190		Thread t1 = newStartedThread(new CheckedRunnable() {
1191		public void realRun() throws InterruptedException {
1192		lock.writeLock().lock();
1193	<	assertWriteLockedBy(lock, Thread.currentThread());
1193	>	assertWriteLockedByMoi(lock);
1194		assertEquals(1, lock.writeLock().getHoldCount());
1195		locked.countDown();
1196		c.await();
1197	<	assertWriteLockedBy(lock, Thread.currentThread());
1197	>	assertWriteLockedByMoi(lock);
1198		assertEquals(1, lock.writeLock().getHoldCount());
1199		lock.writeLock().unlock();
1200		}});
#	Line 1163 | Line 1203 | public class ReentrantReadWriteLockTest
1203		public void realRun() throws InterruptedException {
1204		lock.writeLock().lock();
1205		lock.writeLock().lock();
1206	<	assertWriteLockedBy(lock, Thread.currentThread());
1206	>	assertWriteLockedByMoi(lock);
1207		assertEquals(2, lock.writeLock().getHoldCount());
1208		locked.countDown();
1209		c.await();
1210	<	assertWriteLockedBy(lock, Thread.currentThread());
1210	>	assertWriteLockedByMoi(lock);
1211		assertEquals(2, lock.writeLock().getHoldCount());
1212		lock.writeLock().unlock();
1213		lock.writeLock().unlock();
#	Line 1205 | Line 1245 | public class ReentrantReadWriteLockTest
1245		assertEquals(1, clone.getReadLockCount());
1246		clone.readLock().unlock();
1247		clone.writeLock().unlock();
1248	+	assertFalse(clone.isWriteLocked());
1249	+	assertEquals(1, lock.getReadLockCount());
1250	+	assertEquals(0, clone.getReadLockCount());
1251		}
1252
1253		/**
#	Line 1248 | Line 1291 | public class ReentrantReadWriteLockTest
1291		}
1292
1293		/**
1294	<	* hasQueuedThread reports whether a thread is queued.
1294	>	* hasQueuedThread reports whether a thread is queued
1295		*/
1296		public void testHasQueuedThread()      { testHasQueuedThread(false); }
1297		public void testHasQueuedThread_fair() { testHasQueuedThread(true); }
#	Line 1589 | Line 1632 | public class ReentrantReadWriteLockTest
1632		public void testToString_fair() { testToString(true); }
1633		public void testToString(boolean fair) {
1634		ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1635	<	String us = lock.toString();
1636	<	assertTrue(us.indexOf("Write locks = 0") >= 0);
1637	<	assertTrue(us.indexOf("Read locks = 0") >= 0);
1638	<	lock.writeLock().lock();
1639	<	String ws = lock.toString();
1597	<	assertTrue(ws.indexOf("Write locks = 1") >= 0);
1598	<	assertTrue(ws.indexOf("Read locks = 0") >= 0);
1635	>	assertTrue(lock.toString().contains("Write locks = 0"));
1636	>	assertTrue(lock.toString().contains("Read locks = 0"));
1637	>	lock.writeLock().lock();
1638	>	assertTrue(lock.toString().contains("Write locks = 1"));
1639	>	assertTrue(lock.toString().contains("Read locks = 0"));
1640		lock.writeLock().unlock();
1641		lock.readLock().lock();
1642		lock.readLock().lock();
1643	<	String rs = lock.toString();
1644	<	assertTrue(rs.indexOf("Write locks = 0") >= 0);
1604	<	assertTrue(rs.indexOf("Read locks = 2") >= 0);
1643	>	assertTrue(lock.toString().contains("Write locks = 0"));
1644	>	assertTrue(lock.toString().contains("Read locks = 2"));
1645		}
1646
1647		/**
#	Line 1611 | Line 1651 | public class ReentrantReadWriteLockTest
1651		public void testReadLockToString_fair() { testReadLockToString(true); }
1652		public void testReadLockToString(boolean fair) {
1653		ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1654	<	String us = lock.readLock().toString();
1615	<	assertTrue(us.indexOf("Read locks = 0") >= 0);
1654	>	assertTrue(lock.readLock().toString().contains("Read locks = 0"));
1655		lock.readLock().lock();
1656		lock.readLock().lock();
1657	<	String rs = lock.readLock().toString();
1619	<	assertTrue(rs.indexOf("Read locks = 2") >= 0);
1657	>	assertTrue(lock.readLock().toString().contains("Read locks = 2"));
1658		}
1659
1660		/**
#	Line 1626 | Line 1664 | public class ReentrantReadWriteLockTest
1664		public void testWriteLockToString_fair() { testWriteLockToString(true); }
1665		public void testWriteLockToString(boolean fair) {
1666		ReentrantReadWriteLock lock = new ReentrantReadWriteLock(fair);
1667	<	String us = lock.writeLock().toString();
1630	<	assertTrue(us.indexOf("Unlocked") >= 0);
1667	>	assertTrue(lock.writeLock().toString().contains("Unlocked"));
1668		lock.writeLock().lock();
1669	<	String ls = lock.writeLock().toString();
1670	<	assertTrue(ls.indexOf("Locked") >= 0);
1669	>	assertTrue(lock.writeLock().toString().contains("Locked"));
1670	>	lock.writeLock().unlock();
1671	>	assertTrue(lock.writeLock().toString().contains("Unlocked"));
1672		}
1673
1674		}

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