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root/jsr166/jsr166/src/test/tck/JSR166TestCase.java

Comparing jsr166/src/test/tck/JSR166TestCase.java (file contents):
Revision 1.78 by jsr166, Sat May 7 19:03:26 2011 UTC vs.
Revision 1.169 by jsr166, Thu Oct 8 21:50:26 2015 UTC

#	Line 6 | Line 6
6		* Pat Fisher, Mike Judd.
7		*/
8
9	–	import junit.framework.*;
10	–	import java.util.Arrays;
11	–	import java.util.NoSuchElementException;
12	–	import java.util.PropertyPermission;
13	–	import java.util.concurrent.*;
14	–	import java.util.concurrent.atomic.AtomicReference;
9		import static java.util.concurrent.TimeUnit.MILLISECONDS;
10	+	import static java.util.concurrent.TimeUnit.MINUTES;
11		import static java.util.concurrent.TimeUnit.NANOSECONDS;
12	+
13	+	import java.io.ByteArrayInputStream;
14	+	import java.io.ByteArrayOutputStream;
15	+	import java.io.ObjectInputStream;
16	+	import java.io.ObjectOutputStream;
17	+	import java.lang.management.ManagementFactory;
18	+	import java.lang.management.ThreadInfo;
19	+	import java.lang.management.ThreadMXBean;
20	+	import java.lang.reflect.Constructor;
21	+	import java.lang.reflect.Method;
22	+	import java.lang.reflect.Modifier;
23		import java.security.CodeSource;
24		import java.security.Permission;
25		import java.security.PermissionCollection;
#	Line 21 | Line 27 | import java.security.Permissions;
27		import java.security.Policy;
28		import java.security.ProtectionDomain;
29		import java.security.SecurityPermission;
30	+	import java.util.ArrayList;
31	+	import java.util.Arrays;
32	+	import java.util.Date;
33	+	import java.util.Enumeration;
34	+	import java.util.Iterator;
35	+	import java.util.List;
36	+	import java.util.NoSuchElementException;
37	+	import java.util.PropertyPermission;
38	+	import java.util.concurrent.BlockingQueue;
39	+	import java.util.concurrent.Callable;
40	+	import java.util.concurrent.CountDownLatch;
41	+	import java.util.concurrent.CyclicBarrier;
42	+	import java.util.concurrent.ExecutionException;
43	+	import java.util.concurrent.Executors;
44	+	import java.util.concurrent.ExecutorService;
45	+	import java.util.concurrent.ForkJoinPool;
46	+	import java.util.concurrent.Future;
47	+	import java.util.concurrent.RecursiveAction;
48	+	import java.util.concurrent.RecursiveTask;
49	+	import java.util.concurrent.RejectedExecutionHandler;
50	+	import java.util.concurrent.Semaphore;
51	+	import java.util.concurrent.ThreadFactory;
52	+	import java.util.concurrent.ThreadPoolExecutor;
53	+	import java.util.concurrent.TimeoutException;
54	+	import java.util.concurrent.atomic.AtomicReference;
55	+	import java.util.regex.Pattern;
56	+
57	+	import junit.framework.AssertionFailedError;
58	+	import junit.framework.Test;
59	+	import junit.framework.TestCase;
60	+	import junit.framework.TestResult;
61	+	import junit.framework.TestSuite;
62
63		/**
64		* Base class for JSR166 Junit TCK tests.  Defines some constants,
#	Line 32 | Line 70 | import java.security.SecurityPermission;
70		*
71		* <ol>
72		*
73	<	* <li> All assertions in code running in generated threads must use
73	>	* <li>All assertions in code running in generated threads must use
74		* the forms {@link #threadFail}, {@link #threadAssertTrue}, {@link
75		* #threadAssertEquals}, or {@link #threadAssertNull}, (not
76		* {@code fail}, {@code assertTrue}, etc.) It is OK (but not
77		* particularly recommended) for other code to use these forms too.
78		* Only the most typically used JUnit assertion methods are defined
79	<	* this way, but enough to live with.</li>
79	>	* this way, but enough to live with.
80		*
81	<	* <li> If you override {@link #setUp} or {@link #tearDown}, make sure
81	>	* <li>If you override {@link #setUp} or {@link #tearDown}, make sure
82		* to invoke {@code super.setUp} and {@code super.tearDown} within
83		* them. These methods are used to clear and check for thread
84	<	* assertion failures.</li>
84	>	* assertion failures.
85		*
86		* <li>All delays and timeouts must use one of the constants {@code
87		* SHORT_DELAY_MS}, {@code SMALL_DELAY_MS}, {@code MEDIUM_DELAY_MS},
#	Line 54 | Line 92 | import java.security.SecurityPermission;
92		* is always discriminable as larger than SHORT and smaller than
93		* MEDIUM.  And so on. These constants are set to conservative values,
94		* but even so, if there is ever any doubt, they can all be increased
95	<	* in one spot to rerun tests on slower platforms.</li>
95	>	* in one spot to rerun tests on slower platforms.
96		*
97	<	* <li> All threads generated must be joined inside each test case
97	>	* <li>All threads generated must be joined inside each test case
98		* method (or {@code fail} to do so) before returning from the
99		* method. The {@code joinPool} method can be used to do this when
100	<	* using Executors.</li>
100	>	* using Executors.
101		*
102		* </ol>
103		*
104	<	* <p> <b>Other notes</b>
104	>	* <p><b>Other notes</b>
105		* <ul>
106		*
107	<	* <li> Usually, there is one testcase method per JSR166 method
107	>	* <li>Usually, there is one testcase method per JSR166 method
108		* covering "normal" operation, and then as many exception-testing
109		* methods as there are exceptions the method can throw. Sometimes
110		* there are multiple tests per JSR166 method when the different
111		* "normal" behaviors differ significantly. And sometimes testcases
112		* cover multiple methods when they cannot be tested in
113	<	* isolation.</li>
113	>	* isolation.
114		*
115	<	* <li> The documentation style for testcases is to provide as javadoc
115	>	* <li>The documentation style for testcases is to provide as javadoc
116		* a simple sentence or two describing the property that the testcase
117		* method purports to test. The javadocs do not say anything about how
118	<	* the property is tested. To find out, read the code.</li>
118	>	* the property is tested. To find out, read the code.
119		*
120	<	* <li> These tests are "conformance tests", and do not attempt to
120	>	* <li>These tests are "conformance tests", and do not attempt to
121		* test throughput, latency, scalability or other performance factors
122		* (see the separate "jtreg" tests for a set intended to check these
123		* for the most central aspects of functionality.) So, most tests use
124		* the smallest sensible numbers of threads, collection sizes, etc
125	<	* needed to check basic conformance.</li>
125	>	* needed to check basic conformance.
126		*
127		* <li>The test classes currently do not declare inclusion in
128		* any particular package to simplify things for people integrating
129	<	* them in TCK test suites.</li>
129	>	* them in TCK test suites.
130		*
131	<	* <li> As a convenience, the {@code main} of this class (JSR166TestCase)
132	<	* runs all JSR166 unit tests.</li>
131	>	* <li>As a convenience, the {@code main} of this class (JSR166TestCase)
132	>	* runs all JSR166 unit tests.
133		*
134		* </ul>
135		*/
#	Line 103 | Line 141 | public class JSR166TestCase extends Test
141		Boolean.getBoolean("jsr166.expensiveTests");
142
143		/**
144	+	* If true, also run tests that are not part of the official tck
145	+	* because they test unspecified implementation details.
146	+	*/
147	+	protected static final boolean testImplementationDetails =
148	+	Boolean.getBoolean("jsr166.testImplementationDetails");
149	+
150	+	/**
151		* If true, report on stdout all "slow" tests, that is, ones that
152		* take more than profileThreshold milliseconds to execute.
153		*/
#	Line 116 | Line 161 | public class JSR166TestCase extends Test
161		private static final long profileThreshold =
162		Long.getLong("jsr166.profileThreshold", 100);
163
164	+	/**
165	+	* The number of repetitions per test (for tickling rare bugs).
166	+	*/
167	+	private static final int runsPerTest =
168	+	Integer.getInteger("jsr166.runsPerTest", 1);
169	+
170	+	/**
171	+	* The number of repetitions of the test suite (for finding leaks?).
172	+	*/
173	+	private static final int suiteRuns =
174	+	Integer.getInteger("jsr166.suiteRuns", 1);
175	+
176	+	public JSR166TestCase() { super(); }
177	+	public JSR166TestCase(String name) { super(name); }
178	+
179	+	/**
180	+	* A filter for tests to run, matching strings of the form
181	+	* methodName(className), e.g. "testInvokeAll5(ForkJoinPoolTest)"
182	+	* Usefully combined with jsr166.runsPerTest.
183	+	*/
184	+	private static final Pattern methodFilter = methodFilter();
185	+
186	+	private static Pattern methodFilter() {
187	+	String regex = System.getProperty("jsr166.methodFilter");
188	+	return (regex == null) ? null : Pattern.compile(regex);
189	+	}
190	+
191	+	static volatile TestCase currentTestCase;
192	+	static {
193	+	Runnable checkForWedgedTest = new Runnable() { public void run() {
194	+	// avoid spurious reports with enormous runsPerTest
195	+	final int timeoutMinutes = Math.max(runsPerTest / 10, 1);
196	+	for (TestCase lastTestCase = currentTestCase;;) {
197	+	try { MINUTES.sleep(timeoutMinutes); }
198	+	catch (InterruptedException unexpected) { break; }
199	+	if (lastTestCase == currentTestCase) {
200	+	System.err.println
201	+	("Looks like we're stuck running test: "
202	+	+ lastTestCase);
203	+	System.err.println("availableProcessors=" +
204	+	Runtime.getRuntime().availableProcessors());
205	+	dumpTestThreads();
206	+	// one stack dump is probably enough; more would be spam
207	+	break;
208	+	}
209	+	lastTestCase = currentTestCase;
210	+	}}};
211	+	Thread thread = new Thread(checkForWedgedTest, "checkForWedgedTest");
212	+	thread.setDaemon(true);
213	+	thread.start();
214	+	}
215	+
216	+	public void runBare() throws Throwable {
217	+	currentTestCase = this;
218	+	if (methodFilter == null
219	+	|| methodFilter.matcher(toString()).find())
220	+	super.runBare();
221	+	}
222	+
223		protected void runTest() throws Throwable {
224	<	if (profileTests)
225	<	runTestProfiled();
226	<	else
227	<	super.runTest();
224	>	for (int i = 0; i < runsPerTest; i++) {
225	>	if (profileTests)
226	>	runTestProfiled();
227	>	else
228	>	super.runTest();
229	>	}
230		}
231
232		protected void runTestProfiled() throws Throwable {
233	<	long t0 = System.nanoTime();
234	<	try {
233	>	for (int i = 0; i < 2; i++) {
234	>	long startTime = System.nanoTime();
235		super.runTest();
236	<	} finally {
237	<	long elapsedMillis =
238	<	(System.nanoTime() - t0) / (1000L * 1000L);
239	<	if (elapsedMillis >= profileThreshold)
236	>	long elapsedMillis = millisElapsedSince(startTime);
237	>	if (elapsedMillis < profileThreshold)
238	>	break;
239	>	// Never report first run of any test; treat it as a
240	>	// warmup run, notably to trigger all needed classloading,
241	>	if (i > 0)
242		System.out.printf("%n%s: %d%n", toString(), elapsedMillis);
243		}
244		}
245
246		/**
247	<	* Runs all JSR166 unit tests using junit.textui.TestRunner
247	>	* Runs all JSR166 unit tests using junit.textui.TestRunner.
248		*/
249		public static void main(String[] args) {
250	+	main(suite(), args);
251	+	}
252	+
253	+	/**
254	+	* Runs all unit tests in the given test suite.
255	+	* Actual behavior influenced by jsr166.* system properties.
256	+	*/
257	+	static void main(Test suite, String[] args) {
258		if (useSecurityManager) {
259		System.err.println("Setting a permissive security manager");
260		Policy.setPolicy(permissivePolicy());
261		System.setSecurityManager(new SecurityManager());
262		}
263	<	int iters = (args.length == 0) ? 1 : Integer.parseInt(args[0]);
264	<
265	<	Test s = suite();
266	<	for (int i = 0; i < iters; ++i) {
151	<	junit.textui.TestRunner.run(s);
263	>	for (int i = 0; i < suiteRuns; i++) {
264	>	TestResult result = junit.textui.TestRunner.run(suite);
265	>	if (!result.wasSuccessful())
266	>	System.exit(1);
267		System.gc();
268		System.runFinalization();
269		}
155	–	System.exit(0);
270		}
271
272		public static TestSuite newTestSuite(Object... suiteOrClasses) {
#	Line 168 | Line 282 | public class JSR166TestCase extends Test
282		return suite;
283		}
284
285	+	public static void addNamedTestClasses(TestSuite suite,
286	+	String... testClassNames) {
287	+	for (String testClassName : testClassNames) {
288	+	try {
289	+	Class<?> testClass = Class.forName(testClassName);
290	+	Method m = testClass.getDeclaredMethod("suite",
291	+	new Class<?>[0]);
292	+	suite.addTest(newTestSuite((Test)m.invoke(null)));
293	+	} catch (Exception e) {
294	+	throw new Error("Missing test class", e);
295	+	}
296	+	}
297	+	}
298	+
299	+	public static final double JAVA_CLASS_VERSION;
300	+	public static final String JAVA_SPECIFICATION_VERSION;
301	+	static {
302	+	try {
303	+	JAVA_CLASS_VERSION = java.security.AccessController.doPrivileged(
304	+	new java.security.PrivilegedAction<Double>() {
305	+	public Double run() {
306	+	return Double.valueOf(System.getProperty("java.class.version"));}});
307	+	JAVA_SPECIFICATION_VERSION = java.security.AccessController.doPrivileged(
308	+	new java.security.PrivilegedAction<String>() {
309	+	public String run() {
310	+	return System.getProperty("java.specification.version");}});
311	+	} catch (Throwable t) {
312	+	throw new Error(t);
313	+	}
314	+	}
315	+
316	+	public static boolean atLeastJava6() { return JAVA_CLASS_VERSION >= 50.0; }
317	+	public static boolean atLeastJava7() { return JAVA_CLASS_VERSION >= 51.0; }
318	+	public static boolean atLeastJava8() { return JAVA_CLASS_VERSION >= 52.0; }
319	+	public static boolean atLeastJava9() {
320	+	return JAVA_CLASS_VERSION >= 53.0
321	+	// As of 2015-09, java9 still uses 52.0 class file version
322	+	|| JAVA_SPECIFICATION_VERSION.matches("^(1\\.)?(9|[0-9][0-9])$");
323	+	}
324	+	public static boolean atLeastJava10() {
325	+	return JAVA_CLASS_VERSION >= 54.0
326	+	|| JAVA_SPECIFICATION_VERSION.matches("^(1\\.)?[0-9][0-9]$");
327	+	}
328	+
329		/**
330		* Collects all JSR166 unit tests as one suite.
331		*/
332		public static Test suite() {
333	<	return newTestSuite(
333	>	// Java7+ test classes
334	>	TestSuite suite = newTestSuite(
335		ForkJoinPoolTest.suite(),
336		ForkJoinTaskTest.suite(),
337		RecursiveActionTest.suite(),
#	Line 237 | Line 396 | public class JSR166TestCase extends Test
396		TreeSetTest.suite(),
397		TreeSubMapTest.suite(),
398		TreeSubSetTest.suite());
399	+
400	+	// Java8+ test classes
401	+	if (atLeastJava8()) {
402	+	String[] java8TestClassNames = {
403	+	"Atomic8Test",
404	+	"CompletableFutureTest",
405	+	"ConcurrentHashMap8Test",
406	+	"CountedCompleterTest",
407	+	"DoubleAccumulatorTest",
408	+	"DoubleAdderTest",
409	+	"ForkJoinPool8Test",
410	+	"ForkJoinTask8Test",
411	+	"LongAccumulatorTest",
412	+	"LongAdderTest",
413	+	"SplittableRandomTest",
414	+	"StampedLockTest",
415	+	"SubmissionPublisherTest",
416	+	"ThreadLocalRandom8Test",
417	+	};
418	+	addNamedTestClasses(suite, java8TestClassNames);
419	+	}
420	+
421	+	// Java9+ test classes
422	+	if (atLeastJava9()) {
423	+	String[] java9TestClassNames = {
424	+	// Currently empty, but expecting varhandle tests
425	+	};
426	+	addNamedTestClasses(suite, java9TestClassNames);
427	+	}
428	+
429	+	return suite;
430	+	}
431	+
432	+	/** Returns list of junit-style test method names in given class. */
433	+	public static ArrayList<String> testMethodNames(Class<?> testClass) {
434	+	Method[] methods = testClass.getDeclaredMethods();
435	+	ArrayList<String> names = new ArrayList<String>(methods.length);
436	+	for (Method method : methods) {
437	+	if (method.getName().startsWith("test")
438	+	&& Modifier.isPublic(method.getModifiers())
439	+	// method.getParameterCount() requires jdk8+
440	+	&& method.getParameterTypes().length == 0) {
441	+	names.add(method.getName());
442	+	}
443	+	}
444	+	return names;
445		}
446
447	+	/**
448	+	* Returns junit-style testSuite for the given test class, but
449	+	* parameterized by passing extra data to each test.
450	+	*/
451	+	public static <ExtraData> Test parameterizedTestSuite
452	+	(Class<? extends JSR166TestCase> testClass,
453	+	Class<ExtraData> dataClass,
454	+	ExtraData data) {
455	+	try {
456	+	TestSuite suite = new TestSuite();
457	+	Constructor c =
458	+	testClass.getDeclaredConstructor(dataClass, String.class);
459	+	for (String methodName : testMethodNames(testClass))
460	+	suite.addTest((Test) c.newInstance(data, methodName));
461	+	return suite;
462	+	} catch (Exception e) {
463	+	throw new Error(e);
464	+	}
465	+	}
466	+
467	+	/**
468	+	* Returns junit-style testSuite for the jdk8 extension of the
469	+	* given test class, but parameterized by passing extra data to
470	+	* each test.  Uses reflection to allow compilation in jdk7.
471	+	*/
472	+	public static <ExtraData> Test jdk8ParameterizedTestSuite
473	+	(Class<? extends JSR166TestCase> testClass,
474	+	Class<ExtraData> dataClass,
475	+	ExtraData data) {
476	+	if (atLeastJava8()) {
477	+	String name = testClass.getName();
478	+	String name8 = name.replaceAll("Test$", "8Test");
479	+	if (name.equals(name8)) throw new Error(name);
480	+	try {
481	+	return (Test)
482	+	Class.forName(name8)
483	+	.getMethod("testSuite", new Class[] { dataClass })
484	+	.invoke(null, data);
485	+	} catch (Exception e) {
486	+	throw new Error(e);
487	+	}
488	+	} else {
489	+	return new TestSuite();
490	+	}
491	+	}
492	+
493	+	// Delays for timing-dependent tests, in milliseconds.
494
495		public static long SHORT_DELAY_MS;
496		public static long SMALL_DELAY_MS;
497		public static long MEDIUM_DELAY_MS;
498		public static long LONG_DELAY_MS;
499
248	–
500		/**
501		* Returns the shortest timed delay. This could
502		* be reimplemented to use for example a Property.
#	Line 254 | Line 505 | public class JSR166TestCase extends Test
505		return 50;
506		}
507
257	–
508		/**
509		* Sets delays as multiples of SHORT_DELAY.
510		*/
#	Line 266 | Line 516 | public class JSR166TestCase extends Test
516		}
517
518		/**
519	+	* Returns a timeout in milliseconds to be used in tests that
520	+	* verify that operations block or time out.
521	+	*/
522	+	long timeoutMillis() {
523	+	return SHORT_DELAY_MS / 4;
524	+	}
525	+
526	+	/**
527	+	* Returns a new Date instance representing a time at least
528	+	* delayMillis milliseconds in the future.
529	+	*/
530	+	Date delayedDate(long delayMillis) {
531	+	// Add 1 because currentTimeMillis is known to round into the past.
532	+	return new Date(System.currentTimeMillis() + delayMillis + 1);
533	+	}
534	+
535	+	/**
536		* The first exception encountered if any threadAssertXXX method fails.
537		*/
538		private final AtomicReference<Throwable> threadFailure
#	Line 278 | Line 545 | public class JSR166TestCase extends Test
545		* the same test have no effect.
546		*/
547		public void threadRecordFailure(Throwable t) {
548	+	System.err.println(t);
549	+	dumpTestThreads();
550		threadFailure.compareAndSet(null, t);
551		}
552
#	Line 285 | Line 554 | public class JSR166TestCase extends Test
554		setDelays();
555		}
556
557	+	void tearDownFail(String format, Object... args) {
558	+	String msg = toString() + ": " + String.format(format, args);
559	+	System.err.println(msg);
560	+	dumpTestThreads();
561	+	throw new AssertionFailedError(msg);
562	+	}
563	+
564		/**
565	+	* Extra checks that get done for all test cases.
566	+	*
567		* Triggers test case failure if any thread assertions have failed,
568		* by rethrowing, in the test harness thread, any exception recorded
569		* earlier by threadRecordFailure.
570	+	*
571	+	* Triggers test case failure if interrupt status is set in the main thread.
572		*/
573		public void tearDown() throws Exception {
574		Throwable t = threadFailure.getAndSet(null);
#	Line 306 | Line 586 | public class JSR166TestCase extends Test
586		throw afe;
587		}
588		}
589	+
590	+	if (Thread.interrupted())
591	+	tearDownFail("interrupt status set in main thread");
592	+
593	+	checkForkJoinPoolThreadLeaks();
594	+	}
595	+
596	+	/**
597	+	* Finds missing PoolCleaners
598	+	*/
599	+	void checkForkJoinPoolThreadLeaks() throws InterruptedException {
600	+	Thread[] survivors = new Thread[7];
601	+	int count = Thread.enumerate(survivors);
602	+	for (int i = 0; i < count; i++) {
603	+	Thread thread = survivors[i];
604	+	String name = thread.getName();
605	+	if (name.startsWith("ForkJoinPool-")) {
606	+	// give thread some time to terminate
607	+	thread.join(LONG_DELAY_MS);
608	+	if (thread.isAlive())
609	+	tearDownFail("Found leaked ForkJoinPool thread thread=%s",
610	+	thread);
611	+	}
612	+	}
613	+
614	+	if (!ForkJoinPool.commonPool()
615	+	.awaitQuiescence(LONG_DELAY_MS, MILLISECONDS))
616	+	tearDownFail("ForkJoin common pool thread stuck");
617		}
618
619		/**
#	Line 318 | Line 626 | public class JSR166TestCase extends Test
626		fail(reason);
627		} catch (AssertionFailedError t) {
628		threadRecordFailure(t);
629	<	fail(reason);
629	>	throw t;
630		}
631		}
632
#	Line 386 | Line 694 | public class JSR166TestCase extends Test
694		public void threadAssertEquals(Object x, Object y) {
695		try {
696		assertEquals(x, y);
697	<	} catch (AssertionFailedError t) {
698	<	threadRecordFailure(t);
699	<	throw t;
700	<	} catch (Throwable t) {
701	<	threadUnexpectedException(t);
697	>	} catch (AssertionFailedError fail) {
698	>	threadRecordFailure(fail);
699	>	throw fail;
700	>	} catch (Throwable fail) {
701	>	threadUnexpectedException(fail);
702		}
703		}
704
#	Line 402 | Line 710 | public class JSR166TestCase extends Test
710		public void threadAssertSame(Object x, Object y) {
711		try {
712		assertSame(x, y);
713	<	} catch (AssertionFailedError t) {
714	<	threadRecordFailure(t);
715	<	throw t;
713	>	} catch (AssertionFailedError fail) {
714	>	threadRecordFailure(fail);
715	>	throw fail;
716		}
717		}
718
#	Line 437 | Line 745 | public class JSR166TestCase extends Test
745		else {
746		AssertionFailedError afe =
747		new AssertionFailedError("unexpected exception: " + t);
748	<	t.initCause(t);
748	>	afe.initCause(t);
749		throw afe;
750		}
751		}
752
753		/**
754	<	* Delays, via Thread.sleep for the given millisecond delay, but
754	>	* Delays, via Thread.sleep, for the given millisecond delay, but
755		* if the sleep is shorter than specified, may re-sleep or yield
756	<	* until time elapses.
756	>	* until time elapses.  Ensures that the given time, as measured
757	>	* by System.nanoTime(), has elapsed.
758		*/
759	<	public static void delay(long ms) throws InterruptedException {
760	<	long startTime = System.nanoTime();
761	<	long ns = ms * 1000 * 1000;
762	<	for (;;) {
763	<	if (ms > 0L)
764	<	Thread.sleep(ms);
759	>	static void delay(long millis) throws InterruptedException {
760	>	long nanos = millis * (1000 * 1000);
761	>	final long wakeupTime = System.nanoTime() + nanos;
762	>	do {
763	>	if (millis > 0L)
764	>	Thread.sleep(millis);
765		else // too short to sleep
766		Thread.yield();
767	<	long d = ns - (System.nanoTime() - startTime);
768	<	if (d > 0L)
769	<	ms = d / (1000 * 1000);
770	<	else
771	<	break;
767	>	nanos = wakeupTime - System.nanoTime();
768	>	millis = nanos / (1000 * 1000);
769	>	} while (nanos >= 0L);
770	>	}
771	>
772	>	/**
773	>	* Allows use of try-with-resources with per-test thread pools.
774	>	*/
775	>	class PoolCleaner implements AutoCloseable {
776	>	private final ExecutorService pool;
777	>	public PoolCleaner(ExecutorService pool) { this.pool = pool; }
778	>	public void close() { joinPool(pool); }
779	>	}
780	>
781	>	/**
782	>	* An extension of PoolCleaner that has an action to release the pool.
783	>	*/
784	>	class PoolCleanerWithReleaser extends PoolCleaner {
785	>	private final Runnable releaser;
786	>	public PoolCleanerWithReleaser(ExecutorService pool, Runnable releaser) {
787	>	super(pool);
788	>	this.releaser = releaser;
789		}
790	+	public void close() {
791	+	try {
792	+	releaser.run();
793	+	} finally {
794	+	super.close();
795	+	}
796	+	}
797	+	}
798	+
799	+	PoolCleaner cleaner(ExecutorService pool) {
800	+	return new PoolCleaner(pool);
801	+	}
802	+
803	+	PoolCleaner cleaner(ExecutorService pool, Runnable releaser) {
804	+	return new PoolCleanerWithReleaser(pool, releaser);
805	+	}
806	+
807	+	PoolCleaner cleaner(ExecutorService pool, CountDownLatch latch) {
808	+	return new PoolCleanerWithReleaser(pool, releaser(latch));
809	+	}
810	+
811	+	Runnable releaser(final CountDownLatch latch) {
812	+	return new Runnable() { public void run() {
813	+	do { latch.countDown(); }
814	+	while (latch.getCount() > 0);
815	+	}};
816		}
817
818		/**
819		* Waits out termination of a thread pool or fails doing so.
820		*/
821	<	public void joinPool(ExecutorService exec) {
821	>	void joinPool(ExecutorService pool) {
822		try {
823	<	exec.shutdown();
824	<	assertTrue("ExecutorService did not terminate in a timely manner",
825	<	exec.awaitTermination(2 * LONG_DELAY_MS, MILLISECONDS));
823	>	pool.shutdown();
824	>	if (!pool.awaitTermination(2 * LONG_DELAY_MS, MILLISECONDS)) {
825	>	try {
826	>	threadFail("ExecutorService " + pool +
827	>	" did not terminate in a timely manner");
828	>	} finally {
829	>	// last resort, for the benefit of subsequent tests
830	>	pool.shutdownNow();
831	>	pool.awaitTermination(MEDIUM_DELAY_MS, MILLISECONDS);
832	>	}
833	>	}
834		} catch (SecurityException ok) {
835		// Allowed in case test doesn't have privs
836	<	} catch (InterruptedException ie) {
837	<	fail("Unexpected InterruptedException");
836	>	} catch (InterruptedException fail) {
837	>	threadFail("Unexpected InterruptedException");
838		}
839		}
840
841	+	/** Like Runnable, but with the freedom to throw anything */
842	+	interface Action { public void run() throws Throwable; }
843	+
844		/**
845	<	* Checks that thread does not terminate within timeoutMillis
846	<	* milliseconds (that is, Thread.join times out).
845	>	* Runs all the given actions in parallel, failing if any fail.
846	>	* Useful for running multiple variants of tests that are
847	>	* necessarily individually slow because they must block.
848		*/
849	<	public void assertThreadJoinTimesOut(Thread thread, long timeoutMillis) {
849	>	void testInParallel(Action ... actions) {
850	>	ExecutorService pool = Executors.newCachedThreadPool();
851	>	try (PoolCleaner cleaner = cleaner(pool)) {
852	>	ArrayList<Future<?>> futures = new ArrayList<>(actions.length);
853	>	for (final Action action : actions)
854	>	futures.add(pool.submit(new CheckedRunnable() {
855	>	public void realRun() throws Throwable { action.run();}}));
856	>	for (Future<?> future : futures)
857	>	try {
858	>	assertNull(future.get(LONG_DELAY_MS, MILLISECONDS));
859	>	} catch (ExecutionException ex) {
860	>	threadUnexpectedException(ex.getCause());
861	>	} catch (Exception ex) {
862	>	threadUnexpectedException(ex);
863	>	}
864	>	}
865	>	}
866	>
867	>	/**
868	>	* A debugging tool to print stack traces of most threads, as jstack does.
869	>	* Uninteresting threads are filtered out.
870	>	*/
871	>	static void dumpTestThreads() {
872	>	ThreadMXBean threadMXBean = ManagementFactory.getThreadMXBean();
873	>	System.err.println("------ stacktrace dump start ------");
874	>	for (ThreadInfo info : threadMXBean.dumpAllThreads(true, true)) {
875	>	String name = info.getThreadName();
876	>	if ("Signal Dispatcher".equals(name))
877	>	continue;
878	>	if ("Reference Handler".equals(name)
879	>	&& info.getLockName().startsWith("java.lang.ref.Reference$Lock"))
880	>	continue;
881	>	if ("Finalizer".equals(name)
882	>	&& info.getLockName().startsWith("java.lang.ref.ReferenceQueue$Lock"))
883	>	continue;
884	>	if ("checkForWedgedTest".equals(name))
885	>	continue;
886	>	System.err.print(info);
887	>	}
888	>	System.err.println("------ stacktrace dump end ------");
889	>	}
890	>
891	>	/**
892	>	* Checks that thread does not terminate within the default
893	>	* millisecond delay of {@code timeoutMillis()}.
894	>	*/
895	>	void assertThreadStaysAlive(Thread thread) {
896	>	assertThreadStaysAlive(thread, timeoutMillis());
897	>	}
898	>
899	>	/**
900	>	* Checks that thread does not terminate within the given millisecond delay.
901	>	*/
902	>	void assertThreadStaysAlive(Thread thread, long millis) {
903		try {
904	<	long startTime = System.nanoTime();
905	<	thread.join(timeoutMillis);
904	>	// No need to optimize the failing case via Thread.join.
905	>	delay(millis);
906		assertTrue(thread.isAlive());
907	<	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
908	<	} catch (InterruptedException ie) {
492	<	fail("Unexpected InterruptedException");
907	>	} catch (InterruptedException fail) {
908	>	threadFail("Unexpected InterruptedException");
909		}
910		}
911
912		/**
913	+	* Checks that the threads do not terminate within the default
914	+	* millisecond delay of {@code timeoutMillis()}.
915	+	*/
916	+	void assertThreadsStayAlive(Thread... threads) {
917	+	assertThreadsStayAlive(timeoutMillis(), threads);
918	+	}
919	+
920	+	/**
921	+	* Checks that the threads do not terminate within the given millisecond delay.
922	+	*/
923	+	void assertThreadsStayAlive(long millis, Thread... threads) {
924	+	try {
925	+	// No need to optimize the failing case via Thread.join.
926	+	delay(millis);
927	+	for (Thread thread : threads)
928	+	assertTrue(thread.isAlive());
929	+	} catch (InterruptedException fail) {
930	+	threadFail("Unexpected InterruptedException");
931	+	}
932	+	}
933	+
934	+	/**
935	+	* Checks that future.get times out, with the default timeout of
936	+	* {@code timeoutMillis()}.
937	+	*/
938	+	void assertFutureTimesOut(Future future) {
939	+	assertFutureTimesOut(future, timeoutMillis());
940	+	}
941	+
942	+	/**
943	+	* Checks that future.get times out, with the given millisecond timeout.
944	+	*/
945	+	void assertFutureTimesOut(Future future, long timeoutMillis) {
946	+	long startTime = System.nanoTime();
947	+	try {
948	+	future.get(timeoutMillis, MILLISECONDS);
949	+	shouldThrow();
950	+	} catch (TimeoutException success) {
951	+	} catch (Exception fail) {
952	+	threadUnexpectedException(fail);
953	+	} finally { future.cancel(true); }
954	+	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
955	+	}
956	+
957	+	/**
958		* Fails with message "should throw exception".
959		*/
960		public void shouldThrow() {
#	Line 532 | Line 993 | public class JSR166TestCase extends Test
993		public static final Integer m6  = new Integer(-6);
994		public static final Integer m10 = new Integer(-10);
995
535	–
996		/**
997		* Runs Runnable r with a security policy that permits precisely
998		* the specified permissions.  If there is no current security
#	Line 544 | Line 1004 | public class JSR166TestCase extends Test
1004		SecurityManager sm = System.getSecurityManager();
1005		if (sm == null) {
1006		r.run();
1007	+	}
1008	+	runWithSecurityManagerWithPermissions(r, permissions);
1009	+	}
1010	+
1011	+	/**
1012	+	* Runs Runnable r with a security policy that permits precisely
1013	+	* the specified permissions.  If there is no current security
1014	+	* manager, a temporary one is set for the duration of the
1015	+	* Runnable.  We require that any security manager permit
1016	+	* getPolicy/setPolicy.
1017	+	*/
1018	+	public void runWithSecurityManagerWithPermissions(Runnable r,
1019	+	Permission... permissions) {
1020	+	SecurityManager sm = System.getSecurityManager();
1021	+	if (sm == null) {
1022		Policy savedPolicy = Policy.getPolicy();
1023		try {
1024		Policy.setPolicy(permissivePolicy());
1025		System.setSecurityManager(new SecurityManager());
1026	<	runWithPermissions(r, permissions);
1026	>	runWithSecurityManagerWithPermissions(r, permissions);
1027		} finally {
1028		System.setSecurityManager(null);
1029		Policy.setPolicy(savedPolicy);
#	Line 596 | Line 1071 | public class JSR166TestCase extends Test
1071		return perms.implies(p);
1072		}
1073		public void refresh() {}
1074	+	public String toString() {
1075	+	List<Permission> ps = new ArrayList<Permission>();
1076	+	for (Enumeration<Permission> e = perms.elements(); e.hasMoreElements();)
1077	+	ps.add(e.nextElement());
1078	+	return "AdjustablePolicy with permissions " + ps;
1079	+	}
1080		}
1081
1082		/**
#	Line 624 | Line 1105 | public class JSR166TestCase extends Test
1105		void sleep(long millis) {
1106		try {
1107		delay(millis);
1108	<	} catch (InterruptedException ie) {
1108	>	} catch (InterruptedException fail) {
1109		AssertionFailedError afe =
1110		new AssertionFailedError("Unexpected InterruptedException");
1111	<	afe.initCause(ie);
1111	>	afe.initCause(fail);
1112		throw afe;
1113		}
1114		}
1115
1116		/**
1117	<	* Sleeps until the timeout has elapsed, or interrupted.
637	<	* Does <em>NOT</em> throw InterruptedException.
638	<	*/
639	<	void sleepTillInterrupted(long timeoutMillis) {
640	<	try {
641	<	Thread.sleep(timeoutMillis);
642	<	} catch (InterruptedException wakeup) {}
643	<	}
644	<
645	<	/**
646	<	* Waits up to the specified number of milliseconds for the given
1117	>	* Spin-waits up to the specified number of milliseconds for the given
1118		* thread to enter a wait state: BLOCKED, WAITING, or TIMED_WAITING.
1119		*/
1120		void waitForThreadToEnterWaitState(Thread thread, long timeoutMillis) {
1121	<	long timeoutNanos = timeoutMillis * 1000L * 1000L;
651	<	long t0 = System.nanoTime();
1121	>	long startTime = System.nanoTime();
1122		for (;;) {
1123		Thread.State s = thread.getState();
1124		if (s == Thread.State.BLOCKED ||
#	Line 657 | Line 1127 | public class JSR166TestCase extends Test
1127		return;
1128		else if (s == Thread.State.TERMINATED)
1129		fail("Unexpected thread termination");
1130	<	else if (System.nanoTime() - t0 > timeoutNanos) {
1130	>	else if (millisElapsedSince(startTime) > timeoutMillis) {
1131		threadAssertTrue(thread.isAlive());
1132		return;
1133		}
#	Line 676 | Line 1146 | public class JSR166TestCase extends Test
1146		/**
1147		* Returns the number of milliseconds since time given by
1148		* startNanoTime, which must have been previously returned from a
1149	<	* call to {@link System.nanoTime()}.
1149	>	* call to {@link System#nanoTime()}.
1150		*/
1151	<	long millisElapsedSince(long startNanoTime) {
1151	>	static long millisElapsedSince(long startNanoTime) {
1152		return NANOSECONDS.toMillis(System.nanoTime() - startNanoTime);
1153		}
1154
1155	+	//     void assertTerminatesPromptly(long timeoutMillis, Runnable r) {
1156	+	//         long startTime = System.nanoTime();
1157	+	//         try {
1158	+	//             r.run();
1159	+	//         } catch (Throwable fail) { threadUnexpectedException(fail); }
1160	+	//         if (millisElapsedSince(startTime) > timeoutMillis/2)
1161	+	//             throw new AssertionFailedError("did not return promptly");
1162	+	//     }
1163	+
1164	+	//     void assertTerminatesPromptly(Runnable r) {
1165	+	//         assertTerminatesPromptly(LONG_DELAY_MS/2, r);
1166	+	//     }
1167	+
1168	+	/**
1169	+	* Checks that timed f.get() returns the expected value, and does not
1170	+	* wait for the timeout to elapse before returning.
1171	+	*/
1172	+	<T> void checkTimedGet(Future<T> f, T expectedValue, long timeoutMillis) {
1173	+	long startTime = System.nanoTime();
1174	+	try {
1175	+	assertEquals(expectedValue, f.get(timeoutMillis, MILLISECONDS));
1176	+	} catch (Throwable fail) { threadUnexpectedException(fail); }
1177	+	if (millisElapsedSince(startTime) > timeoutMillis/2)
1178	+	throw new AssertionFailedError("timed get did not return promptly");
1179	+	}
1180	+
1181	+	<T> void checkTimedGet(Future<T> f, T expectedValue) {
1182	+	checkTimedGet(f, expectedValue, LONG_DELAY_MS);
1183	+	}
1184	+
1185		/**
1186		* Returns a new started daemon Thread running the given runnable.
1187		*/
#	Line 700 | Line 1200 | public class JSR166TestCase extends Test
1200		void awaitTermination(Thread t, long timeoutMillis) {
1201		try {
1202		t.join(timeoutMillis);
1203	<	} catch (InterruptedException ie) {
1204	<	threadUnexpectedException(ie);
1203	>	} catch (InterruptedException fail) {
1204	>	threadUnexpectedException(fail);
1205		} finally {
1206	<	if (t.isAlive()) {
1206	>	if (t.getState() != Thread.State.TERMINATED) {
1207		t.interrupt();
1208	<	fail("Test timed out");
1208	>	threadFail("Test timed out");
1209		}
1210		}
1211		}
#	Line 727 | Line 1227 | public class JSR166TestCase extends Test
1227		public final void run() {
1228		try {
1229		realRun();
1230	<	} catch (Throwable t) {
1231	<	threadUnexpectedException(t);
1230	>	} catch (Throwable fail) {
1231	>	threadUnexpectedException(fail);
1232		}
1233		}
1234		}
#	Line 781 | Line 1281 | public class JSR166TestCase extends Test
1281		realRun();
1282		threadShouldThrow("InterruptedException");
1283		} catch (InterruptedException success) {
1284	<	} catch (Throwable t) {
1285	<	threadUnexpectedException(t);
1284	>	threadAssertFalse(Thread.interrupted());
1285	>	} catch (Throwable fail) {
1286	>	threadUnexpectedException(fail);
1287		}
1288		}
1289		}
#	Line 793 | Line 1294 | public class JSR166TestCase extends Test
1294		public final T call() {
1295		try {
1296		return realCall();
1297	<	} catch (Throwable t) {
1298	<	threadUnexpectedException(t);
1297	>	} catch (Throwable fail) {
1298	>	threadUnexpectedException(fail);
1299		return null;
1300		}
1301		}
#	Line 810 | Line 1311 | public class JSR166TestCase extends Test
1311		threadShouldThrow("InterruptedException");
1312		return result;
1313		} catch (InterruptedException success) {
1314	<	} catch (Throwable t) {
1315	<	threadUnexpectedException(t);
1314	>	threadAssertFalse(Thread.interrupted());
1315	>	} catch (Throwable fail) {
1316	>	threadUnexpectedException(fail);
1317		}
1318		return null;
1319		}
#	Line 828 | Line 1330 | public class JSR166TestCase extends Test
1330		public static final String TEST_STRING = "a test string";
1331
1332		public static class StringTask implements Callable<String> {
1333	<	public String call() { return TEST_STRING; }
1333	>	final String value;
1334	>	public StringTask() { this(TEST_STRING); }
1335	>	public StringTask(String value) { this.value = value; }
1336	>	public String call() { return value; }
1337		}
1338
1339		public Callable<String> latchAwaitingStringTask(final CountDownLatch latch) {
#	Line 841 | Line 1346 | public class JSR166TestCase extends Test
1346		}};
1347		}
1348
1349	<	public Runnable awaiter(final CountDownLatch latch) {
1349	>	public Runnable countDowner(final CountDownLatch latch) {
1350		return new CheckedRunnable() {
1351		public void realRun() throws InterruptedException {
1352	<	latch.await();
1352	>	latch.countDown();
1353		}};
1354		}
1355
1356	+	class LatchAwaiter extends CheckedRunnable {
1357	+	static final int NEW = 0;
1358	+	static final int RUNNING = 1;
1359	+	static final int DONE = 2;
1360	+	final CountDownLatch latch;
1361	+	int state = NEW;
1362	+	LatchAwaiter(CountDownLatch latch) { this.latch = latch; }
1363	+	public void realRun() throws InterruptedException {
1364	+	state = 1;
1365	+	await(latch);
1366	+	state = 2;
1367	+	}
1368	+	}
1369	+
1370	+	public LatchAwaiter awaiter(CountDownLatch latch) {
1371	+	return new LatchAwaiter(latch);
1372	+	}
1373	+
1374	+	public void await(CountDownLatch latch) {
1375	+	try {
1376	+	assertTrue(latch.await(LONG_DELAY_MS, MILLISECONDS));
1377	+	} catch (Throwable fail) {
1378	+	threadUnexpectedException(fail);
1379	+	}
1380	+	}
1381	+
1382	+	public void await(Semaphore semaphore) {
1383	+	try {
1384	+	assertTrue(semaphore.tryAcquire(LONG_DELAY_MS, MILLISECONDS));
1385	+	} catch (Throwable fail) {
1386	+	threadUnexpectedException(fail);
1387	+	}
1388	+	}
1389	+
1390	+	//     /**
1391	+	//      * Spin-waits up to LONG_DELAY_MS until flag becomes true.
1392	+	//      */
1393	+	//     public void await(AtomicBoolean flag) {
1394	+	//         await(flag, LONG_DELAY_MS);
1395	+	//     }
1396	+
1397	+	//     /**
1398	+	//      * Spin-waits up to the specified timeout until flag becomes true.
1399	+	//      */
1400	+	//     public void await(AtomicBoolean flag, long timeoutMillis) {
1401	+	//         long startTime = System.nanoTime();
1402	+	//         while (!flag.get()) {
1403	+	//             if (millisElapsedSince(startTime) > timeoutMillis)
1404	+	//                 throw new AssertionFailedError("timed out");
1405	+	//             Thread.yield();
1406	+	//         }
1407	+	//     }
1408	+
1409		public static class NPETask implements Callable<String> {
1410		public String call() { throw new NullPointerException(); }
1411		}
#	Line 1016 | Line 1574 | public class JSR166TestCase extends Test
1574		public abstract class CheckedRecursiveAction extends RecursiveAction {
1575		protected abstract void realCompute() throws Throwable;
1576
1577	<	public final void compute() {
1577	>	@Override protected final void compute() {
1578		try {
1579		realCompute();
1580	<	} catch (Throwable t) {
1581	<	threadUnexpectedException(t);
1580	>	} catch (Throwable fail) {
1581	>	threadUnexpectedException(fail);
1582		}
1583		}
1584		}
#	Line 1031 | Line 1589 | public class JSR166TestCase extends Test
1589		public abstract class CheckedRecursiveTask<T> extends RecursiveTask<T> {
1590		protected abstract T realCompute() throws Throwable;
1591
1592	<	public final T compute() {
1592	>	@Override protected final T compute() {
1593		try {
1594		return realCompute();
1595	<	} catch (Throwable t) {
1596	<	threadUnexpectedException(t);
1595	>	} catch (Throwable fail) {
1596	>	threadUnexpectedException(fail);
1597		return null;
1598		}
1599		}
#	Line 1050 | Line 1608 | public class JSR166TestCase extends Test
1608		}
1609
1610		/**
1611	<	* A CyclicBarrier that fails with AssertionFailedErrors instead
1612	<	* of throwing checked exceptions.
1611	>	* A CyclicBarrier that uses timed await and fails with
1612	>	* AssertionFailedErrors instead of throwing checked exceptions.
1613		*/
1614		public class CheckedBarrier extends CyclicBarrier {
1615		public CheckedBarrier(int parties) { super(parties); }
1616
1617		public int await() {
1618		try {
1619	<	return super.await();
1620	<	} catch (Exception e) {
1619	>	return super.await(2 * LONG_DELAY_MS, MILLISECONDS);
1620	>	} catch (TimeoutException timedOut) {
1621	>	throw new AssertionFailedError("timed out");
1622	>	} catch (Exception fail) {
1623		AssertionFailedError afe =
1624	<	new AssertionFailedError("Unexpected exception: " + e);
1625	<	afe.initCause(e);
1624	>	new AssertionFailedError("Unexpected exception: " + fail);
1625	>	afe.initCause(fail);
1626		throw afe;
1627		}
1628		}
1629		}
1630
1631	<	public void checkEmpty(BlockingQueue q) {
1631	>	void checkEmpty(BlockingQueue q) {
1632		try {
1633		assertTrue(q.isEmpty());
1634		assertEquals(0, q.size());
#	Line 1090 | Line 1650 | public class JSR166TestCase extends Test
1650		q.remove();
1651		shouldThrow();
1652		} catch (NoSuchElementException success) {}
1653	<	} catch (InterruptedException ie) {
1654	<	threadUnexpectedException(ie);
1653	>	} catch (InterruptedException fail) { threadUnexpectedException(fail); }
1654	>	}
1655	>
1656	>	void assertSerialEquals(Object x, Object y) {
1657	>	assertTrue(Arrays.equals(serialBytes(x), serialBytes(y)));
1658	>	}
1659	>
1660	>	void assertNotSerialEquals(Object x, Object y) {
1661	>	assertFalse(Arrays.equals(serialBytes(x), serialBytes(y)));
1662	>	}
1663	>
1664	>	byte[] serialBytes(Object o) {
1665	>	try {
1666	>	ByteArrayOutputStream bos = new ByteArrayOutputStream();
1667	>	ObjectOutputStream oos = new ObjectOutputStream(bos);
1668	>	oos.writeObject(o);
1669	>	oos.flush();
1670	>	oos.close();
1671	>	return bos.toByteArray();
1672	>	} catch (Throwable fail) {
1673	>	threadUnexpectedException(fail);
1674	>	return new byte[0];
1675	>	}
1676	>	}
1677	>
1678	>	@SuppressWarnings("unchecked")
1679	>	<T> T serialClone(T o) {
1680	>	try {
1681	>	ObjectInputStream ois = new ObjectInputStream
1682	>	(new ByteArrayInputStream(serialBytes(o)));
1683	>	T clone = (T) ois.readObject();
1684	>	assertSame(o.getClass(), clone.getClass());
1685	>	return clone;
1686	>	} catch (Throwable fail) {
1687	>	threadUnexpectedException(fail);
1688	>	return null;
1689		}
1690		}
1691
1692	+	public void assertThrows(Class<? extends Throwable> expectedExceptionClass,
1693	+	Runnable... throwingActions) {
1694	+	for (Runnable throwingAction : throwingActions) {
1695	+	boolean threw = false;
1696	+	try { throwingAction.run(); }
1697	+	catch (Throwable t) {
1698	+	threw = true;
1699	+	if (!expectedExceptionClass.isInstance(t)) {
1700	+	AssertionFailedError afe =
1701	+	new AssertionFailedError
1702	+	("Expected " + expectedExceptionClass.getName() +
1703	+	", got " + t.getClass().getName());
1704	+	afe.initCause(t);
1705	+	threadUnexpectedException(afe);
1706	+	}
1707	+	}
1708	+	if (!threw)
1709	+	shouldThrow(expectedExceptionClass.getName());
1710	+	}
1711	+	}
1712	+
1713	+	public void assertIteratorExhausted(Iterator<?> it) {
1714	+	try {
1715	+	it.next();
1716	+	shouldThrow();
1717	+	} catch (NoSuchElementException success) {}
1718	+	assertFalse(it.hasNext());
1719	+	}
1720		}

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