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

Comparing jsr166/src/test/tck/CyclicBarrierTest.java (file contents):
Revision 1.5 by dl, Sun Oct 5 23:00:40 2003 UTC vs.
Revision 1.25 by jsr166, Sat Nov 26 05:19:17 2011 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.*;
11	>	import java.util.concurrent.BrokenBarrierException;
12	>	import java.util.concurrent.CountDownLatch;
13	>	import java.util.concurrent.CyclicBarrier;
14	>	import java.util.concurrent.TimeoutException;
15	>	import java.util.concurrent.atomic.AtomicBoolean;
16	>	import static java.util.concurrent.TimeUnit.MILLISECONDS;
17
18	<	public class CyclicBarrierTest extends JSR166TestCase{
18	>	public class CyclicBarrierTest extends JSR166TestCase {
19		public static void main(String[] args) {
20	<	junit.textui.TestRunner.run (suite());
20	>	junit.textui.TestRunner.run(suite());
21		}
22		public static Test suite() {
23	<	return new TestSuite(CyclicBarrierTest.class);
23	>	return new TestSuite(CyclicBarrierTest.class);
24		}
25
26		private volatile int countAction;
27		private class MyAction implements Runnable {
28		public void run() { ++countAction; }
29		}
30	<
30	>
31	>	/**
32	>	* Spin-waits till the number of waiters == numberOfWaiters.
33	>	*/
34	>	void awaitNumberWaiting(CyclicBarrier barrier, int numberOfWaiters) {
35	>	long startTime = System.nanoTime();
36	>	while (barrier.getNumberWaiting() != numberOfWaiters) {
37	>	if (millisElapsedSince(startTime) > LONG_DELAY_MS)
38	>	fail("timed out");
39	>	Thread.yield();
40	>	}
41	>	}
42	>
43		/**
44		* Creating with negative parties throws IAE
45		*/
#	Line 29 | Line 47 | public class CyclicBarrierTest extends J
47		try {
48		new CyclicBarrier(-1, (Runnable)null);
49		shouldThrow();
50	<	} catch(IllegalArgumentException e){}
50	>	} catch (IllegalArgumentException success) {}
51		}
52
53		/**
#	Line 39 | Line 57 | public class CyclicBarrierTest extends J
57		try {
58		new CyclicBarrier(-1);
59		shouldThrow();
60	<	} catch(IllegalArgumentException e){}
60	>	} catch (IllegalArgumentException success) {}
61		}
62
63		/**
#	Line 47 | Line 65 | public class CyclicBarrierTest extends J
65		*/
66		public void testGetParties() {
67		CyclicBarrier b = new CyclicBarrier(2);
68	<	assertEquals(2, b.getParties());
68	>	assertEquals(2, b.getParties());
69		assertEquals(0, b.getNumberWaiting());
70		}
71
72		/**
73		* A 1-party barrier triggers after single await
74		*/
75	<	public void testSingleParty() {
76	<	try {
77	<	CyclicBarrier b = new CyclicBarrier(1);
78	<	assertEquals(1, b.getParties());
79	<	assertEquals(0, b.getNumberWaiting());
80	<	b.await();
81	<	b.await();
64	<	assertEquals(0, b.getNumberWaiting());
65	<	}
66	<	catch(Exception e) {
67	<	unexpectedException();
68	<	}
75	>	public void testSingleParty() throws Exception {
76	>	CyclicBarrier b = new CyclicBarrier(1);
77	>	assertEquals(1, b.getParties());
78	>	assertEquals(0, b.getNumberWaiting());
79	>	b.await();
80	>	b.await();
81	>	assertEquals(0, b.getNumberWaiting());
82		}
83	<
83	>
84		/**
85		* The supplied barrier action is run at barrier
86		*/
87	<	public void testBarrierAction() {
88	<	try {
89	<	countAction = 0;
90	<	CyclicBarrier b = new CyclicBarrier(1, new MyAction());
91	<	assertEquals(1, b.getParties());
92	<	assertEquals(0, b.getNumberWaiting());
93	<	b.await();
94	<	b.await();
95	<	assertEquals(0, b.getNumberWaiting());
83	<	assertEquals(countAction, 2);
84	<	}
85	<	catch(Exception e) {
86	<	unexpectedException();
87	<	}
87	>	public void testBarrierAction() throws Exception {
88	>	countAction = 0;
89	>	CyclicBarrier b = new CyclicBarrier(1, new MyAction());
90	>	assertEquals(1, b.getParties());
91	>	assertEquals(0, b.getNumberWaiting());
92	>	b.await();
93	>	b.await();
94	>	assertEquals(0, b.getNumberWaiting());
95	>	assertEquals(2, countAction);
96		}
97
98		/**
99		* A 2-party/thread barrier triggers after both threads invoke await
100		*/
101	<	public void testTwoParties() {
101	>	public void testTwoParties() throws Exception {
102		final CyclicBarrier b = new CyclicBarrier(2);
103	<	Thread t = new Thread(new Runnable() {
104	<	public void run() {
105	<	try {
106	<	b.await();
107	<	b.await();
108	<	b.await();
109	<	b.await();
110	<	} catch(Exception e){
111	<	threadUnexpectedException();
112	<	}}});
113	<
114	<	try {
115	<	t.start();
108	<	b.await();
109	<	b.await();
110	<	b.await();
111	<	b.await();
112	<	t.join();
113	<	} catch(Exception e){
114	<	unexpectedException();
115	<	}
103	>	Thread t = newStartedThread(new CheckedRunnable() {
104	>	public void realRun() throws Exception {
105	>	b.await();
106	>	b.await();
107	>	b.await();
108	>	b.await();
109	>	}});
110	>
111	>	b.await();
112	>	b.await();
113	>	b.await();
114	>	b.await();
115	>	awaitTermination(t);
116		}
117
118	–
118		/**
119		* An interruption in one party causes others waiting in await to
120		* throw BrokenBarrierException
121		*/
122		public void testAwait1_Interrupted_BrokenBarrier() {
123		final CyclicBarrier c = new CyclicBarrier(3);
124	<	Thread t1 = new Thread(new Runnable() {
125	<	public void run() {
126	<	try {
127	<	c.await();
128	<	threadShouldThrow();
129	<	} catch(InterruptedException success){}
130	<	catch(Exception b){
131	<	threadUnexpectedException();
132	<	}
133	<	}
134	<	});
135	<	Thread t2 = new Thread(new Runnable() {
136	<	public void run() {
137	<	try {
138	<	c.await();
139	<	threadShouldThrow();
140	<	} catch(BrokenBarrierException success){
141	<	} catch(Exception i){
143	<	threadUnexpectedException();
144	<	}
145	<	}
146	<	});
147	<	try {
148	<	t1.start();
149	<	t2.start();
150	<	Thread.sleep(SHORT_DELAY_MS);
151	<	t1.interrupt();
152	<	t1.join();
153	<	t2.join();
154	<	} catch(InterruptedException e){
155	<	unexpectedException();
156	<	}
124	>	final CountDownLatch pleaseInterrupt = new CountDownLatch(2);
125	>	Thread t1 = new ThreadShouldThrow(InterruptedException.class) {
126	>	public void realRun() throws Exception {
127	>	pleaseInterrupt.countDown();
128	>	c.await();
129	>	}};
130	>	Thread t2 = new ThreadShouldThrow(BrokenBarrierException.class) {
131	>	public void realRun() throws Exception {
132	>	pleaseInterrupt.countDown();
133	>	c.await();
134	>	}};
135	>
136	>	t1.start();
137	>	t2.start();
138	>	await(pleaseInterrupt);
139	>	t1.interrupt();
140	>	awaitTermination(t1);
141	>	awaitTermination(t2);
142		}
143
144		/**
145		* An interruption in one party causes others waiting in timed await to
146		* throw BrokenBarrierException
147		*/
148	<	public void testAwait2_Interrupted_BrokenBarrier() {
149	<	final CyclicBarrier c = new CyclicBarrier(3);
150	<	Thread t1 = new Thread(new Runnable() {
151	<	public void run() {
152	<	try {
153	<	c.await(MEDIUM_DELAY_MS, TimeUnit.MILLISECONDS);
154	<	threadShouldThrow();
155	<	} catch(InterruptedException success){
156	<	} catch(Exception b){
157	<	threadUnexpectedException();
158	<	}
159	<	}
160	<	});
161	<	Thread t2 = new Thread(new Runnable() {
162	<	public void run() {
163	<	try {
164	<	c.await(MEDIUM_DELAY_MS, TimeUnit.MILLISECONDS);
165	<	threadShouldThrow();
166	<	} catch(BrokenBarrierException success){
167	<	} catch(Exception i){
183	<	threadUnexpectedException();
184	<	}
185	<	}
186	<	});
187	<	try {
188	<	t1.start();
189	<	t2.start();
190	<	Thread.sleep(SHORT_DELAY_MS);
191	<	t1.interrupt();
192	<	t1.join();
193	<	t2.join();
194	<	} catch(InterruptedException e){
195	<	unexpectedException();
196	<	}
148	>	public void testAwait2_Interrupted_BrokenBarrier() throws Exception {
149	>	final CyclicBarrier c = new CyclicBarrier(3);
150	>	final CountDownLatch pleaseInterrupt = new CountDownLatch(2);
151	>	Thread t1 = new ThreadShouldThrow(InterruptedException.class) {
152	>	public void realRun() throws Exception {
153	>	pleaseInterrupt.countDown();
154	>	c.await(LONG_DELAY_MS, MILLISECONDS);
155	>	}};
156	>	Thread t2 = new ThreadShouldThrow(BrokenBarrierException.class) {
157	>	public void realRun() throws Exception {
158	>	pleaseInterrupt.countDown();
159	>	c.await(LONG_DELAY_MS, MILLISECONDS);
160	>	}};
161	>
162	>	t1.start();
163	>	t2.start();
164	>	await(pleaseInterrupt);
165	>	t1.interrupt();
166	>	awaitTermination(t1);
167	>	awaitTermination(t2);
168		}
169	<
169	>
170		/**
171		* A timeout in timed await throws TimeoutException
172		*/
173	<	public void testAwait3_TimeOutException() {
173	>	public void testAwait3_TimeoutException() throws InterruptedException {
174		final CyclicBarrier c = new CyclicBarrier(2);
175	<	Thread t = new Thread(new Runnable() {
176	<	public void run() {
177	<	try {
178	<	c.await(SHORT_DELAY_MS, TimeUnit.MILLISECONDS);
179	<	threadShouldThrow();
180	<	} catch(TimeoutException success){
181	<	} catch(Exception b){
182	<	threadUnexpectedException();
183	<
184	<	}
185	<	}
215	<	});
216	<	try {
217	<	t.start();
218	<	t.join();
219	<	} catch(InterruptedException e){
220	<	unexpectedException();
221	<	}
175	>	Thread t = newStartedThread(new CheckedRunnable() {
176	>	public void realRun() throws Exception {
177	>	long startTime = System.nanoTime();
178	>	try {
179	>	c.await(timeoutMillis(), MILLISECONDS);
180	>	shouldThrow();
181	>	} catch (TimeoutException success) {}
182	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
183	>	}});
184	>
185	>	awaitTermination(t);
186		}
187
188		/**
189		* A timeout in one party causes others waiting in timed await to
190		* throw BrokenBarrierException
191		*/
192	<	public void testAwait4_Timeout_BrokenBarrier() {
193	<	final CyclicBarrier c = new CyclicBarrier(3);
194	<	Thread t1 = new Thread(new Runnable() {
195	<	public void run() {
196	<	try {
197	<	c.await(SHORT_DELAY_MS, TimeUnit.MILLISECONDS);
198	<	threadShouldThrow();
199	<	} catch(TimeoutException success){
200	<	} catch(Exception b){
201	<	threadUnexpectedException();
202	<	}
203	<	}
204	<	});
205	<	Thread t2 = new Thread(new Runnable() {
206	<	public void run() {
207	<	try {
208	<	c.await(MEDIUM_DELAY_MS, TimeUnit.MILLISECONDS);
209	<	threadShouldThrow();
210	<	} catch(BrokenBarrierException success){
211	<	} catch(Exception i){
212	<	threadUnexpectedException();
213	<	}
250	<	}
251	<	});
252	<	try {
253	<	t1.start();
254	<	t2.start();
255	<	t1.join();
256	<	t2.join();
257	<	} catch(InterruptedException e){
258	<	unexpectedException();
259	<	}
192	>	public void testAwait4_Timeout_BrokenBarrier() throws InterruptedException {
193	>	final CyclicBarrier c = new CyclicBarrier(3);
194	>	Thread t1 = newStartedThread(new CheckedRunnable() {
195	>	public void realRun() throws Exception {
196	>	try {
197	>	c.await(LONG_DELAY_MS, MILLISECONDS);
198	>	shouldThrow();
199	>	} catch (BrokenBarrierException success) {}
200	>	}});
201	>	Thread t2 = newStartedThread(new CheckedRunnable() {
202	>	public void realRun() throws Exception {
203	>	awaitNumberWaiting(c, 1);
204	>	long startTime = System.nanoTime();
205	>	try {
206	>	c.await(timeoutMillis(), MILLISECONDS);
207	>	shouldThrow();
208	>	} catch (TimeoutException success) {}
209	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
210	>	}});
211	>
212	>	awaitTermination(t1);
213	>	awaitTermination(t2);
214		}
215
216		/**
217		* A timeout in one party causes others waiting in await to
218		* throw BrokenBarrierException
219		*/
220	<	public void testAwait5_Timeout_BrokenBarrier() {
221	<	final CyclicBarrier c = new CyclicBarrier(3);
222	<	Thread t1 = new Thread(new Runnable() {
223	<	public void run() {
224	<	try {
225	<	c.await(SHORT_DELAY_MS, TimeUnit.MILLISECONDS);
226	<	threadShouldThrow();
227	<	} catch(TimeoutException success){
228	<	} catch(Exception b){
229	<	threadUnexpectedException();
230	<	}
231	<	}
232	<	});
233	<	Thread t2 = new Thread(new Runnable() {
234	<	public void run() {
235	<	try {
236	<	c.await();
237	<	threadShouldThrow();
238	<	} catch(BrokenBarrierException success){
239	<	} catch(Exception i){
240	<	threadUnexpectedException();
241	<	}
288	<	}
289	<	});
290	<	try {
291	<	t1.start();
292	<	t2.start();
293	<	t1.join();
294	<	t2.join();
295	<	} catch(InterruptedException e){
296	<	unexpectedException();
297	<	}
220	>	public void testAwait5_Timeout_BrokenBarrier() throws InterruptedException {
221	>	final CyclicBarrier c = new CyclicBarrier(3);
222	>	Thread t1 = newStartedThread(new CheckedRunnable() {
223	>	public void realRun() throws Exception {
224	>	try {
225	>	c.await();
226	>	shouldThrow();
227	>	} catch (BrokenBarrierException success) {}
228	>	}});
229	>	Thread t2 = newStartedThread(new CheckedRunnable() {
230	>	public void realRun() throws Exception {
231	>	awaitNumberWaiting(c, 1);
232	>	long startTime = System.nanoTime();
233	>	try {
234	>	c.await(timeoutMillis(), MILLISECONDS);
235	>	shouldThrow();
236	>	} catch (TimeoutException success) {}
237	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
238	>	}});
239	>
240	>	awaitTermination(t1);
241	>	awaitTermination(t2);
242		}
243	<
243	>
244		/**
245		* A reset of an active barrier causes waiting threads to throw
246		* BrokenBarrierException
247		*/
248	<	public void testReset_BrokenBarrier() {
248	>	public void testReset_BrokenBarrier() throws InterruptedException {
249		final CyclicBarrier c = new CyclicBarrier(3);
250	<	Thread t1 = new Thread(new Runnable() {
251	<	public void run() {
252	<	try {
253	<	c.await();
254	<	threadShouldThrow();
255	<	} catch(BrokenBarrierException success){}
256	<	catch(Exception b){
257	<	threadUnexpectedException();
258	<	}
259	<	}
260	<	});
261	<	Thread t2 = new Thread(new Runnable() {
262	<	public void run() {
263	<	try {
264	<	c.await();
265	<	threadShouldThrow();
266	<	} catch(BrokenBarrierException success){
267	<	} catch(Exception i){
268	<	threadUnexpectedException();
269	<	}
326	<	}
327	<	});
328	<	try {
329	<	t1.start();
330	<	t2.start();
331	<	Thread.sleep(SHORT_DELAY_MS);
332	<	c.reset();
333	<	t1.join();
334	<	t2.join();
335	<	} catch(InterruptedException e){
336	<	unexpectedException();
337	<	}
250	>	final CountDownLatch pleaseReset = new CountDownLatch(2);
251	>	Thread t1 = new ThreadShouldThrow(BrokenBarrierException.class) {
252	>	public void realRun() throws Exception {
253	>	pleaseReset.countDown();
254	>	c.await();
255	>	}};
256	>	Thread t2 = new ThreadShouldThrow(BrokenBarrierException.class) {
257	>	public void realRun() throws Exception {
258	>	pleaseReset.countDown();
259	>	c.await();
260	>	}};
261	>
262	>	t1.start();
263	>	t2.start();
264	>	await(pleaseReset);
265	>
266	>	awaitNumberWaiting(c, 2);
267	>	c.reset();
268	>	awaitTermination(t1);
269	>	awaitTermination(t2);
270		}
271
272		/**
273		* A reset before threads enter barrier does not throw
274		* BrokenBarrierException
275		*/
276	<	public void testReset_NoBrokenBarrier() {
276	>	public void testReset_NoBrokenBarrier() throws Exception {
277		final CyclicBarrier c = new CyclicBarrier(3);
278	<	Thread t1 = new Thread(new Runnable() {
279	<	public void run() {
280	<	try {
281	<	c.await();
282	<	} catch(Exception b){
283	<	threadUnexpectedException();
284	<	}
285	<	}
286	<	});
287	<	Thread t2 = new Thread(new Runnable() {
288	<	public void run() {
278	>	c.reset();
279	>
280	>	Thread t1 = newStartedThread(new CheckedRunnable() {
281	>	public void realRun() throws Exception {
282	>	c.await();
283	>	}});
284	>	Thread t2 = newStartedThread(new CheckedRunnable() {
285	>	public void realRun() throws Exception {
286	>	c.await();
287	>	}});
288	>
289	>	c.await();
290	>	awaitTermination(t1);
291	>	awaitTermination(t2);
292	>	}
293	>
294	>	/**
295	>	* All threads block while a barrier is broken.
296	>	*/
297	>	public void testReset_Leakage() throws InterruptedException {
298	>	final CyclicBarrier c = new CyclicBarrier(2);
299	>	final AtomicBoolean done = new AtomicBoolean();
300	>	Thread t = newStartedThread(new CheckedRunnable() {
301	>	public void realRun() {
302	>	while (!done.get()) {
303		try {
304	+	while (c.isBroken())
305	+	c.reset();
306	+
307		c.await();
308	<	} catch(Exception i){
360	<	threadUnexpectedException();
308	>	shouldThrow();
309		}
310	<	}
311	<	});
312	<	try {
313	<	c.reset();
310	>	catch (BrokenBarrierException ok) {}
311	>	catch (InterruptedException ok) {}
312	>	}}});
313	>
314	>	for (int i = 0; i < 4; i++) {
315	>	delay(timeoutMillis());
316	>	t.interrupt();
317	>	}
318	>	done.set(true);
319	>	t.interrupt();
320	>	awaitTermination(t);
321	>	}
322	>
323	>	/**
324	>	* Reset of a non-broken barrier does not break barrier
325	>	*/
326	>	public void testResetWithoutBreakage() throws Exception {
327	>	final CyclicBarrier barrier = new CyclicBarrier(3);
328	>	for (int i = 0; i < 3; i++) {
329	>	final CyclicBarrier start = new CyclicBarrier(3);
330	>	Thread t1 = newStartedThread(new CheckedRunnable() {
331	>	public void realRun() throws Exception {
332	>	start.await();
333	>	barrier.await();
334	>	}});
335	>
336	>	Thread t2 = newStartedThread(new CheckedRunnable() {
337	>	public void realRun() throws Exception {
338	>	start.await();
339	>	barrier.await();
340	>	}});
341	>
342	>	start.await();
343	>	barrier.await();
344	>	awaitTermination(t1);
345	>	awaitTermination(t2);
346	>	assertFalse(barrier.isBroken());
347	>	assertEquals(0, barrier.getNumberWaiting());
348	>	if (i == 1) barrier.reset();
349	>	assertFalse(barrier.isBroken());
350	>	assertEquals(0, barrier.getNumberWaiting());
351	>	}
352	>	}
353	>
354	>	/**
355	>	* Reset of a barrier after interruption reinitializes it.
356	>	*/
357	>	public void testResetAfterInterrupt() throws Exception {
358	>	final CyclicBarrier barrier = new CyclicBarrier(3);
359	>	for (int i = 0; i < 2; i++) {
360	>	final CyclicBarrier start = new CyclicBarrier(3);
361	>	Thread t1 = new ThreadShouldThrow(InterruptedException.class) {
362	>	public void realRun() throws Exception {
363	>	start.await();
364	>	barrier.await();
365	>	}};
366	>
367	>	Thread t2 = new ThreadShouldThrow(BrokenBarrierException.class) {
368	>	public void realRun() throws Exception {
369	>	start.await();
370	>	barrier.await();
371	>	}};
372	>
373	>	t1.start();
374	>	t2.start();
375	>	start.await();
376	>	t1.interrupt();
377	>	awaitTermination(t1);
378	>	awaitTermination(t2);
379	>	assertTrue(barrier.isBroken());
380	>	assertEquals(0, barrier.getNumberWaiting());
381	>	barrier.reset();
382	>	assertFalse(barrier.isBroken());
383	>	assertEquals(0, barrier.getNumberWaiting());
384	>	}
385	>	}
386	>
387	>	/**
388	>	* Reset of a barrier after timeout reinitializes it.
389	>	*/
390	>	public void testResetAfterTimeout() throws Exception {
391	>	final CyclicBarrier barrier = new CyclicBarrier(3);
392	>	for (int i = 0; i < 2; i++) {
393	>	assertEquals(0, barrier.getNumberWaiting());
394	>	Thread t1 = newStartedThread(new CheckedRunnable() {
395	>	public void realRun() throws Exception {
396	>	try {
397	>	barrier.await();
398	>	shouldThrow();
399	>	} catch (BrokenBarrierException success) {}
400	>	}});
401	>	Thread t2 = newStartedThread(new CheckedRunnable() {
402	>	public void realRun() throws Exception {
403	>	awaitNumberWaiting(barrier, 1);
404	>	long startTime = System.nanoTime();
405	>	try {
406	>	barrier.await(timeoutMillis(), MILLISECONDS);
407	>	shouldThrow();
408	>	} catch (TimeoutException success) {}
409	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis());
410	>	}});
411	>
412	>	awaitTermination(t1);
413	>	awaitTermination(t2);
414	>	assertEquals(0, barrier.getNumberWaiting());
415	>	assertTrue(barrier.isBroken());
416	>	assertEquals(0, barrier.getNumberWaiting());
417	>	barrier.reset();
418	>	assertFalse(barrier.isBroken());
419	>	assertEquals(0, barrier.getNumberWaiting());
420	>	}
421	>	}
422	>
423	>	/**
424	>	* Reset of a barrier after a failed command reinitializes it.
425	>	*/
426	>	public void testResetAfterCommandException() throws Exception {
427	>	final CyclicBarrier barrier =
428	>	new CyclicBarrier(3, new Runnable() {
429	>	public void run() {
430	>	throw new NullPointerException(); }});
431	>	for (int i = 0; i < 2; i++) {
432	>	final CyclicBarrier start = new CyclicBarrier(3);
433	>	Thread t1 = new ThreadShouldThrow(BrokenBarrierException.class) {
434	>	public void realRun() throws Exception {
435	>	start.await();
436	>	barrier.await();
437	>	}};
438	>
439	>	Thread t2 = new ThreadShouldThrow(BrokenBarrierException.class) {
440	>	public void realRun() throws Exception {
441	>	start.await();
442	>	barrier.await();
443	>	}};
444	>
445		t1.start();
446		t2.start();
447	<	c.await();
448	<	t1.join();
449	<	t2.join();
450	<	} catch(Exception e){
451	<	unexpectedException();
447	>	start.await();
448	>	awaitNumberWaiting(barrier, 2);
449	>	try {
450	>	barrier.await();
451	>	shouldThrow();
452	>	} catch (NullPointerException success) {}
453	>	awaitTermination(t1);
454	>	awaitTermination(t2);
455	>	assertTrue(barrier.isBroken());
456	>	assertEquals(0, barrier.getNumberWaiting());
457	>	barrier.reset();
458	>	assertFalse(barrier.isBroken());
459	>	assertEquals(0, barrier.getNumberWaiting());
460		}
461		}
375	–
462		}

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