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

Comparing jsr166/src/test/tck/JSR166TestCase.java (file contents):
Revision 1.61 by jsr166, Mon Oct 11 03:54:10 2010 UTC vs.
Revision 1.146 by jsr166, Fri Sep 25 23:32:15 2015 UTC

#	Line 1 | Line 1
1		/*
2		* Written by Doug Lea with assistance from members of JCP JSR-166
3		* Expert Group and released to the public domain, as explained at
4	<	* http://creativecommons.org/licenses/publicdomain
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.PropertyPermission;
11	–	import java.util.concurrent.*;
12	–	import java.util.concurrent.atomic.AtomicReference;
9		import static java.util.concurrent.TimeUnit.MILLISECONDS;
10	+	import static java.util.concurrent.TimeUnit.NANOSECONDS;
11	+
12	+	import java.io.ByteArrayInputStream;
13	+	import java.io.ByteArrayOutputStream;
14	+	import java.io.ObjectInputStream;
15	+	import java.io.ObjectOutputStream;
16	+	import java.lang.management.ManagementFactory;
17	+	import java.lang.management.ThreadInfo;
18	+	import java.lang.reflect.Constructor;
19	+	import java.lang.reflect.Method;
20	+	import java.lang.reflect.Modifier;
21		import java.security.CodeSource;
22		import java.security.Permission;
23		import java.security.PermissionCollection;
#	Line 18 | Line 25 | import java.security.Permissions;
25		import java.security.Policy;
26		import java.security.ProtectionDomain;
27		import java.security.SecurityPermission;
28	+	import java.util.ArrayList;
29	+	import java.util.Arrays;
30	+	import java.util.Date;
31	+	import java.util.Enumeration;
32	+	import java.util.Iterator;
33	+	import java.util.List;
34	+	import java.util.NoSuchElementException;
35	+	import java.util.PropertyPermission;
36	+	import java.util.concurrent.BlockingQueue;
37	+	import java.util.concurrent.Callable;
38	+	import java.util.concurrent.CountDownLatch;
39	+	import java.util.concurrent.CyclicBarrier;
40	+	import java.util.concurrent.ExecutionException;
41	+	import java.util.concurrent.Executors;
42	+	import java.util.concurrent.ExecutorService;
43	+	import java.util.concurrent.ForkJoinPool;
44	+	import java.util.concurrent.Future;
45	+	import java.util.concurrent.RecursiveAction;
46	+	import java.util.concurrent.RecursiveTask;
47	+	import java.util.concurrent.RejectedExecutionHandler;
48	+	import java.util.concurrent.Semaphore;
49	+	import java.util.concurrent.ThreadFactory;
50	+	import java.util.concurrent.ThreadPoolExecutor;
51	+	import java.util.concurrent.TimeoutException;
52	+	import java.util.concurrent.atomic.AtomicReference;
53	+	import java.util.regex.Pattern;
54	+
55	+	import junit.framework.AssertionFailedError;
56	+	import junit.framework.Test;
57	+	import junit.framework.TestCase;
58	+	import junit.framework.TestResult;
59	+	import junit.framework.TestSuite;
60
61		/**
62		* Base class for JSR166 Junit TCK tests.  Defines some constants,
#	Line 29 | Line 68 | import java.security.SecurityPermission;
68		*
69		* <ol>
70		*
71	<	* <li> All assertions in code running in generated threads must use
71	>	* <li>All assertions in code running in generated threads must use
72		* the forms {@link #threadFail}, {@link #threadAssertTrue}, {@link
73		* #threadAssertEquals}, or {@link #threadAssertNull}, (not
74		* {@code fail}, {@code assertTrue}, etc.) It is OK (but not
75		* particularly recommended) for other code to use these forms too.
76		* Only the most typically used JUnit assertion methods are defined
77	<	* this way, but enough to live with.</li>
77	>	* this way, but enough to live with.
78		*
79	<	* <li> If you override {@link #setUp} or {@link #tearDown}, make sure
79	>	* <li>If you override {@link #setUp} or {@link #tearDown}, make sure
80		* to invoke {@code super.setUp} and {@code super.tearDown} within
81		* them. These methods are used to clear and check for thread
82	<	* assertion failures.</li>
82	>	* assertion failures.
83		*
84		* <li>All delays and timeouts must use one of the constants {@code
85		* SHORT_DELAY_MS}, {@code SMALL_DELAY_MS}, {@code MEDIUM_DELAY_MS},
#	Line 51 | Line 90 | import java.security.SecurityPermission;
90		* is always discriminable as larger than SHORT and smaller than
91		* MEDIUM.  And so on. These constants are set to conservative values,
92		* but even so, if there is ever any doubt, they can all be increased
93	<	* in one spot to rerun tests on slower platforms.</li>
93	>	* in one spot to rerun tests on slower platforms.
94		*
95	<	* <li> All threads generated must be joined inside each test case
95	>	* <li>All threads generated must be joined inside each test case
96		* method (or {@code fail} to do so) before returning from the
97		* method. The {@code joinPool} method can be used to do this when
98	<	* using Executors.</li>
98	>	* using Executors.
99		*
100		* </ol>
101		*
102	<	* <p> <b>Other notes</b>
102	>	* <p><b>Other notes</b>
103		* <ul>
104		*
105	<	* <li> Usually, there is one testcase method per JSR166 method
105	>	* <li>Usually, there is one testcase method per JSR166 method
106		* covering "normal" operation, and then as many exception-testing
107		* methods as there are exceptions the method can throw. Sometimes
108		* there are multiple tests per JSR166 method when the different
109		* "normal" behaviors differ significantly. And sometimes testcases
110		* cover multiple methods when they cannot be tested in
111	<	* isolation.</li>
111	>	* isolation.
112		*
113	<	* <li> The documentation style for testcases is to provide as javadoc
113	>	* <li>The documentation style for testcases is to provide as javadoc
114		* a simple sentence or two describing the property that the testcase
115		* method purports to test. The javadocs do not say anything about how
116	<	* the property is tested. To find out, read the code.</li>
116	>	* the property is tested. To find out, read the code.
117		*
118	<	* <li> These tests are "conformance tests", and do not attempt to
118	>	* <li>These tests are "conformance tests", and do not attempt to
119		* test throughput, latency, scalability or other performance factors
120		* (see the separate "jtreg" tests for a set intended to check these
121		* for the most central aspects of functionality.) So, most tests use
122		* the smallest sensible numbers of threads, collection sizes, etc
123	<	* needed to check basic conformance.</li>
123	>	* needed to check basic conformance.
124		*
125		* <li>The test classes currently do not declare inclusion in
126		* any particular package to simplify things for people integrating
127	<	* them in TCK test suites.</li>
127	>	* them in TCK test suites.
128		*
129	<	* <li> As a convenience, the {@code main} of this class (JSR166TestCase)
130	<	* runs all JSR166 unit tests.</li>
129	>	* <li>As a convenience, the {@code main} of this class (JSR166TestCase)
130	>	* runs all JSR166 unit tests.
131		*
132		* </ul>
133		*/
#	Line 96 | Line 135 | public class JSR166TestCase extends Test
135		private static final boolean useSecurityManager =
136		Boolean.getBoolean("jsr166.useSecurityManager");
137
138	+	protected static final boolean expensiveTests =
139	+	Boolean.getBoolean("jsr166.expensiveTests");
140	+
141	+	/**
142	+	* If true, also run tests that are not part of the official tck
143	+	* because they test unspecified implementation details.
144	+	*/
145	+	protected static final boolean testImplementationDetails =
146	+	Boolean.getBoolean("jsr166.testImplementationDetails");
147	+
148		/**
149		* If true, report on stdout all "slow" tests, that is, ones that
150		* take more than profileThreshold milliseconds to execute.
#	Line 110 | Line 159 | public class JSR166TestCase extends Test
159		private static final long profileThreshold =
160		Long.getLong("jsr166.profileThreshold", 100);
161
162	+	/**
163	+	* The number of repetitions per test (for tickling rare bugs).
164	+	*/
165	+	private static final int runsPerTest =
166	+	Integer.getInteger("jsr166.runsPerTest", 1);
167	+
168	+	/**
169	+	* The number of repetitions of the test suite (for finding leaks?).
170	+	*/
171	+	private static final int suiteRuns =
172	+	Integer.getInteger("jsr166.suiteRuns", 1);
173	+
174	+	public JSR166TestCase() { super(); }
175	+	public JSR166TestCase(String name) { super(name); }
176	+
177	+	/**
178	+	* A filter for tests to run, matching strings of the form
179	+	* methodName(className), e.g. "testInvokeAll5(ForkJoinPoolTest)"
180	+	* Usefully combined with jsr166.runsPerTest.
181	+	*/
182	+	private static final Pattern methodFilter = methodFilter();
183	+
184	+	private static Pattern methodFilter() {
185	+	String regex = System.getProperty("jsr166.methodFilter");
186	+	return (regex == null) ? null : Pattern.compile(regex);
187	+	}
188	+
189		protected void runTest() throws Throwable {
190	<	if (profileTests)
191	<	runTestProfiled();
192	<	else
193	<	super.runTest();
190	>	if (methodFilter == null
191	>	|| methodFilter.matcher(toString()).find()) {
192	>	for (int i = 0; i < runsPerTest; i++) {
193	>	if (profileTests)
194	>	runTestProfiled();
195	>	else
196	>	super.runTest();
197	>	}
198	>	}
199		}
200
201		protected void runTestProfiled() throws Throwable {
202	<	long t0 = System.nanoTime();
203	<	try {
202	>	for (int i = 0; i < 2; i++) {
203	>	long startTime = System.nanoTime();
204		super.runTest();
205	<	} finally {
206	<	long elapsedMillis =
207	<	(System.nanoTime() - t0) / (1000L * 1000L);
208	<	if (elapsedMillis >= profileThreshold)
205	>	long elapsedMillis = millisElapsedSince(startTime);
206	>	if (elapsedMillis < profileThreshold)
207	>	break;
208	>	// Never report first run of any test; treat it as a
209	>	// warmup run, notably to trigger all needed classloading,
210	>	if (i > 0)
211		System.out.printf("%n%s: %d%n", toString(), elapsedMillis);
212		}
213		}
214	<
214	>
215		/**
216	<	* Runs all JSR166 unit tests using junit.textui.TestRunner
216	>	* Runs all JSR166 unit tests using junit.textui.TestRunner.
217		*/
218		public static void main(String[] args) {
219	+	main(suite(), args);
220	+	}
221	+
222	+	/**
223	+	* Runs all unit tests in the given test suite.
224	+	* Actual behavior influenced by jsr166.* system properties.
225	+	*/
226	+	static void main(Test suite, String[] args) {
227		if (useSecurityManager) {
228		System.err.println("Setting a permissive security manager");
229		Policy.setPolicy(permissivePolicy());
230		System.setSecurityManager(new SecurityManager());
231		}
232	<	int iters = (args.length == 0) ? 1 : Integer.parseInt(args[0]);
233	<
234	<	Test s = suite();
235	<	for (int i = 0; i < iters; ++i) {
145	<	junit.textui.TestRunner.run(s);
232	>	for (int i = 0; i < suiteRuns; i++) {
233	>	TestResult result = junit.textui.TestRunner.run(suite);
234	>	if (!result.wasSuccessful())
235	>	System.exit(1);
236		System.gc();
237		System.runFinalization();
238		}
149	–	System.exit(0);
239		}
240
241		public static TestSuite newTestSuite(Object... suiteOrClasses) {
#	Line 162 | Line 251 | public class JSR166TestCase extends Test
251		return suite;
252		}
253
254	+	public static void addNamedTestClasses(TestSuite suite,
255	+	String... testClassNames) {
256	+	for (String testClassName : testClassNames) {
257	+	try {
258	+	Class<?> testClass = Class.forName(testClassName);
259	+	Method m = testClass.getDeclaredMethod("suite",
260	+	new Class<?>[0]);
261	+	suite.addTest(newTestSuite((Test)m.invoke(null)));
262	+	} catch (Exception e) {
263	+	throw new Error("Missing test class", e);
264	+	}
265	+	}
266	+	}
267	+
268	+	public static final double JAVA_CLASS_VERSION;
269	+	public static final String JAVA_SPECIFICATION_VERSION;
270	+	static {
271	+	try {
272	+	JAVA_CLASS_VERSION = java.security.AccessController.doPrivileged(
273	+	new java.security.PrivilegedAction<Double>() {
274	+	public Double run() {
275	+	return Double.valueOf(System.getProperty("java.class.version"));}});
276	+	JAVA_SPECIFICATION_VERSION = java.security.AccessController.doPrivileged(
277	+	new java.security.PrivilegedAction<String>() {
278	+	public String run() {
279	+	return System.getProperty("java.specification.version");}});
280	+	} catch (Throwable t) {
281	+	throw new Error(t);
282	+	}
283	+	}
284	+
285	+	public static boolean atLeastJava6() { return JAVA_CLASS_VERSION >= 50.0; }
286	+	public static boolean atLeastJava7() { return JAVA_CLASS_VERSION >= 51.0; }
287	+	public static boolean atLeastJava8() { return JAVA_CLASS_VERSION >= 52.0; }
288	+	public static boolean atLeastJava9() {
289	+	return JAVA_CLASS_VERSION >= 53.0
290	+	// As of 2015-09, java9 still uses 52.0 class file version
291	+	|| JAVA_SPECIFICATION_VERSION.matches("^(1\\.)?(9|[0-9][0-9])$");
292	+	}
293	+	public static boolean atLeastJava10() {
294	+	return JAVA_CLASS_VERSION >= 54.0
295	+	|| JAVA_SPECIFICATION_VERSION.matches("^(1\\.)?[0-9][0-9]$");
296	+	}
297	+
298		/**
299		* Collects all JSR166 unit tests as one suite.
300		*/
301		public static Test suite() {
302	<	return newTestSuite(
302	>	// Java7+ test classes
303	>	TestSuite suite = newTestSuite(
304		ForkJoinPoolTest.suite(),
305		ForkJoinTaskTest.suite(),
306		RecursiveActionTest.suite(),
#	Line 231 | Line 365 | public class JSR166TestCase extends Test
365		TreeSetTest.suite(),
366		TreeSubMapTest.suite(),
367		TreeSubSetTest.suite());
368	+
369	+	// Java8+ test classes
370	+	if (atLeastJava8()) {
371	+	String[] java8TestClassNames = {
372	+	"Atomic8Test",
373	+	"CompletableFutureTest",
374	+	"ConcurrentHashMap8Test",
375	+	"CountedCompleterTest",
376	+	"DoubleAccumulatorTest",
377	+	"DoubleAdderTest",
378	+	"ForkJoinPool8Test",
379	+	"ForkJoinTask8Test",
380	+	"LongAccumulatorTest",
381	+	"LongAdderTest",
382	+	"SplittableRandomTest",
383	+	"StampedLockTest",
384	+	"SubmissionPublisherTest",
385	+	"ThreadLocalRandom8Test",
386	+	};
387	+	addNamedTestClasses(suite, java8TestClassNames);
388	+	}
389	+
390	+	// Java9+ test classes
391	+	if (atLeastJava9()) {
392	+	String[] java9TestClassNames = {
393	+	// Currently empty, but expecting varhandle tests
394	+	};
395	+	addNamedTestClasses(suite, java9TestClassNames);
396	+	}
397	+
398	+	return suite;
399	+	}
400	+
401	+	/** Returns list of junit-style test method names in given class. */
402	+	public static ArrayList<String> testMethodNames(Class<?> testClass) {
403	+	Method[] methods = testClass.getDeclaredMethods();
404	+	ArrayList<String> names = new ArrayList<String>(methods.length);
405	+	for (Method method : methods) {
406	+	if (method.getName().startsWith("test")
407	+	&& Modifier.isPublic(method.getModifiers())
408	+	// method.getParameterCount() requires jdk8+
409	+	&& method.getParameterTypes().length == 0) {
410	+	names.add(method.getName());
411	+	}
412	+	}
413	+	return names;
414		}
415
416	+	/**
417	+	* Returns junit-style testSuite for the given test class, but
418	+	* parameterized by passing extra data to each test.
419	+	*/
420	+	public static <ExtraData> Test parameterizedTestSuite
421	+	(Class<? extends JSR166TestCase> testClass,
422	+	Class<ExtraData> dataClass,
423	+	ExtraData data) {
424	+	try {
425	+	TestSuite suite = new TestSuite();
426	+	Constructor c =
427	+	testClass.getDeclaredConstructor(dataClass, String.class);
428	+	for (String methodName : testMethodNames(testClass))
429	+	suite.addTest((Test) c.newInstance(data, methodName));
430	+	return suite;
431	+	} catch (Exception e) {
432	+	throw new Error(e);
433	+	}
434	+	}
435	+
436	+	/**
437	+	* Returns junit-style testSuite for the jdk8 extension of the
438	+	* given test class, but parameterized by passing extra data to
439	+	* each test.  Uses reflection to allow compilation in jdk7.
440	+	*/
441	+	public static <ExtraData> Test jdk8ParameterizedTestSuite
442	+	(Class<? extends JSR166TestCase> testClass,
443	+	Class<ExtraData> dataClass,
444	+	ExtraData data) {
445	+	if (atLeastJava8()) {
446	+	String name = testClass.getName();
447	+	String name8 = name.replaceAll("Test$", "8Test");
448	+	if (name.equals(name8)) throw new Error(name);
449	+	try {
450	+	return (Test)
451	+	Class.forName(name8)
452	+	.getMethod("testSuite", new Class[] { dataClass })
453	+	.invoke(null, data);
454	+	} catch (Exception e) {
455	+	throw new Error(e);
456	+	}
457	+	} else {
458	+	return new TestSuite();
459	+	}
460	+
461	+	}
462	+
463	+	// Delays for timing-dependent tests, in milliseconds.
464
465		public static long SHORT_DELAY_MS;
466		public static long SMALL_DELAY_MS;
467		public static long MEDIUM_DELAY_MS;
468		public static long LONG_DELAY_MS;
469
242	–
470		/**
471		* Returns the shortest timed delay. This could
472		* be reimplemented to use for example a Property.
#	Line 248 | Line 475 | public class JSR166TestCase extends Test
475		return 50;
476		}
477
251	–
478		/**
479		* Sets delays as multiples of SHORT_DELAY.
480		*/
#	Line 256 | Line 482 | public class JSR166TestCase extends Test
482		SHORT_DELAY_MS = getShortDelay();
483		SMALL_DELAY_MS  = SHORT_DELAY_MS * 5;
484		MEDIUM_DELAY_MS = SHORT_DELAY_MS * 10;
485	<	LONG_DELAY_MS   = SHORT_DELAY_MS * 50;
485	>	LONG_DELAY_MS   = SHORT_DELAY_MS * 200;
486	>	}
487	>
488	>	/**
489	>	* Returns a timeout in milliseconds to be used in tests that
490	>	* verify that operations block or time out.
491	>	*/
492	>	long timeoutMillis() {
493	>	return SHORT_DELAY_MS / 4;
494	>	}
495	>
496	>	/**
497	>	* Returns a new Date instance representing a time at least
498	>	* delayMillis milliseconds in the future.
499	>	*/
500	>	Date delayedDate(long delayMillis) {
501	>	// Add 1 because currentTimeMillis is known to round into the past.
502	>	return new Date(System.currentTimeMillis() + delayMillis + 1);
503		}
504
505		/**
#	Line 279 | Line 522 | public class JSR166TestCase extends Test
522		setDelays();
523		}
524
525	+	void tearDownFail(String format, Object... args) {
526	+	String msg = toString() + ": " + String.format(format, args);
527	+	System.err.println(msg);
528	+	printAllStackTraces();
529	+	throw new AssertionFailedError(msg);
530	+	}
531	+
532		/**
533	+	* Extra checks that get done for all test cases.
534	+	*
535		* Triggers test case failure if any thread assertions have failed,
536		* by rethrowing, in the test harness thread, any exception recorded
537		* earlier by threadRecordFailure.
538	+	*
539	+	* Triggers test case failure if interrupt status is set in the main thread.
540		*/
541		public void tearDown() throws Exception {
542	<	Throwable t = threadFailure.get();
542	>	Throwable t = threadFailure.getAndSet(null);
543		if (t != null) {
544		if (t instanceof Error)
545		throw (Error) t;
#	Line 300 | Line 554 | public class JSR166TestCase extends Test
554		throw afe;
555		}
556		}
557	+
558	+	if (Thread.interrupted())
559	+	tearDownFail("interrupt status set in main thread");
560	+
561	+	checkForkJoinPoolThreadLeaks();
562	+	}
563	+
564	+	/**
565	+	* Finds missing try { ... } finally { joinPool(e); }
566	+	*/
567	+	void checkForkJoinPoolThreadLeaks() throws InterruptedException {
568	+	Thread[] survivors = new Thread[7];
569	+	int count = Thread.enumerate(survivors);
570	+	for (int i = 0; i < count; i++) {
571	+	Thread thread = survivors[i];
572	+	String name = thread.getName();
573	+	if (name.startsWith("ForkJoinPool-")) {
574	+	// give thread some time to terminate
575	+	thread.join(LONG_DELAY_MS);
576	+	if (thread.isAlive())
577	+	tearDownFail("Found leaked ForkJoinPool thread thread=%s",
578	+	thread);
579	+	}
580	+	}
581	+
582	+	if (!ForkJoinPool.commonPool()
583	+	.awaitQuiescence(LONG_DELAY_MS, MILLISECONDS))
584	+	tearDownFail("ForkJoin common pool thread stuck");
585		}
586
587		/**
#	Line 380 | Line 662 | public class JSR166TestCase extends Test
662		public void threadAssertEquals(Object x, Object y) {
663		try {
664		assertEquals(x, y);
665	<	} catch (AssertionFailedError t) {
666	<	threadRecordFailure(t);
667	<	throw t;
668	<	} catch (Throwable t) {
669	<	threadUnexpectedException(t);
665	>	} catch (AssertionFailedError fail) {
666	>	threadRecordFailure(fail);
667	>	throw fail;
668	>	} catch (Throwable fail) {
669	>	threadUnexpectedException(fail);
670		}
671		}
672
#	Line 396 | Line 678 | public class JSR166TestCase extends Test
678		public void threadAssertSame(Object x, Object y) {
679		try {
680		assertSame(x, y);
681	<	} catch (AssertionFailedError t) {
682	<	threadRecordFailure(t);
683	<	throw t;
681	>	} catch (AssertionFailedError fail) {
682	>	threadRecordFailure(fail);
683	>	throw fail;
684		}
685		}
686
#	Line 431 | Line 713 | public class JSR166TestCase extends Test
713		else {
714		AssertionFailedError afe =
715		new AssertionFailedError("unexpected exception: " + t);
716	<	t.initCause(t);
716	>	afe.initCause(t);
717		throw afe;
718		}
719		}
720
721		/**
722	+	* Delays, via Thread.sleep, for the given millisecond delay, but
723	+	* if the sleep is shorter than specified, may re-sleep or yield
724	+	* until time elapses.
725	+	*/
726	+	static void delay(long millis) throws InterruptedException {
727	+	long startTime = System.nanoTime();
728	+	long ns = millis * 1000 * 1000;
729	+	for (;;) {
730	+	if (millis > 0L)
731	+	Thread.sleep(millis);
732	+	else // too short to sleep
733	+	Thread.yield();
734	+	long d = ns - (System.nanoTime() - startTime);
735	+	if (d > 0L)
736	+	millis = d / (1000 * 1000);
737	+	else
738	+	break;
739	+	}
740	+	}
741	+
742	+	/**
743		* Waits out termination of a thread pool or fails doing so.
744		*/
745	<	public void joinPool(ExecutorService exec) {
745	>	void joinPool(ExecutorService pool) {
746		try {
747	<	exec.shutdown();
748	<	assertTrue("ExecutorService did not terminate in a timely manner",
749	<	exec.awaitTermination(LONG_DELAY_MS, MILLISECONDS));
747	>	pool.shutdown();
748	>	if (!pool.awaitTermination(2 * LONG_DELAY_MS, MILLISECONDS))
749	>	fail("ExecutorService " + pool +
750	>	" did not terminate in a timely manner");
751		} catch (SecurityException ok) {
752		// Allowed in case test doesn't have privs
753	<	} catch (InterruptedException ie) {
753	>	} catch (InterruptedException fail) {
754		fail("Unexpected InterruptedException");
755		}
756		}
757
758	+	/** Like Runnable, but with the freedom to throw anything */
759	+	interface Action { public void run() throws Throwable; }
760	+
761	+	/**
762	+	* Runs all the given actions in parallel, failing if any fail.
763	+	* Useful for running multiple variants of tests that are
764	+	* necessarily individually slow because they must block.
765	+	*/
766	+	void testInParallel(Action ... actions) {
767	+	ExecutorService pool = Executors.newCachedThreadPool();
768	+	try {
769	+	ArrayList<Future<?>> futures = new ArrayList<>(actions.length);
770	+	for (final Action action : actions)
771	+	futures.add(pool.submit(new CheckedRunnable() {
772	+	public void realRun() throws Throwable { action.run();}}));
773	+	for (Future<?> future : futures)
774	+	try {
775	+	assertNull(future.get(LONG_DELAY_MS, MILLISECONDS));
776	+	} catch (ExecutionException ex) {
777	+	threadUnexpectedException(ex.getCause());
778	+	} catch (Exception ex) {
779	+	threadUnexpectedException(ex);
780	+	}
781	+	} finally {
782	+	joinPool(pool);
783	+	}
784	+	}
785	+
786	+	/**
787	+	* A debugging tool to print all stack traces, as jstack does.
788	+	*/
789	+	static void printAllStackTraces() {
790	+	for (ThreadInfo info :
791	+	ManagementFactory.getThreadMXBean()
792	+	.dumpAllThreads(true, true))
793	+	System.err.print(info);
794	+	}
795	+
796	+	/**
797	+	* Checks that thread does not terminate within the default
798	+	* millisecond delay of {@code timeoutMillis()}.
799	+	*/
800	+	void assertThreadStaysAlive(Thread thread) {
801	+	assertThreadStaysAlive(thread, timeoutMillis());
802	+	}
803	+
804	+	/**
805	+	* Checks that thread does not terminate within the given millisecond delay.
806	+	*/
807	+	void assertThreadStaysAlive(Thread thread, long millis) {
808	+	try {
809	+	// No need to optimize the failing case via Thread.join.
810	+	delay(millis);
811	+	assertTrue(thread.isAlive());
812	+	} catch (InterruptedException fail) {
813	+	fail("Unexpected InterruptedException");
814	+	}
815	+	}
816	+
817	+	/**
818	+	* Checks that the threads do not terminate within the default
819	+	* millisecond delay of {@code timeoutMillis()}.
820	+	*/
821	+	void assertThreadsStayAlive(Thread... threads) {
822	+	assertThreadsStayAlive(timeoutMillis(), threads);
823	+	}
824	+
825	+	/**
826	+	* Checks that the threads do not terminate within the given millisecond delay.
827	+	*/
828	+	void assertThreadsStayAlive(long millis, Thread... threads) {
829	+	try {
830	+	// No need to optimize the failing case via Thread.join.
831	+	delay(millis);
832	+	for (Thread thread : threads)
833	+	assertTrue(thread.isAlive());
834	+	} catch (InterruptedException fail) {
835	+	fail("Unexpected InterruptedException");
836	+	}
837	+	}
838	+
839	+	/**
840	+	* Checks that future.get times out, with the default timeout of
841	+	* {@code timeoutMillis()}.
842	+	*/
843	+	void assertFutureTimesOut(Future future) {
844	+	assertFutureTimesOut(future, timeoutMillis());
845	+	}
846	+
847	+	/**
848	+	* Checks that future.get times out, with the given millisecond timeout.
849	+	*/
850	+	void assertFutureTimesOut(Future future, long timeoutMillis) {
851	+	long startTime = System.nanoTime();
852	+	try {
853	+	future.get(timeoutMillis, MILLISECONDS);
854	+	shouldThrow();
855	+	} catch (TimeoutException success) {
856	+	} catch (Exception fail) {
857	+	threadUnexpectedException(fail);
858	+	} finally { future.cancel(true); }
859	+	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
860	+	}
861
862		/**
863		* Fails with message "should throw exception".
#	Line 491 | Line 898 | public class JSR166TestCase extends Test
898		public static final Integer m6  = new Integer(-6);
899		public static final Integer m10 = new Integer(-10);
900
494	–
901		/**
902		* Runs Runnable r with a security policy that permits precisely
903		* the specified permissions.  If there is no current security
#	Line 503 | Line 909 | public class JSR166TestCase extends Test
909		SecurityManager sm = System.getSecurityManager();
910		if (sm == null) {
911		r.run();
912	+	}
913	+	runWithSecurityManagerWithPermissions(r, permissions);
914	+	}
915	+
916	+	/**
917	+	* Runs Runnable r with a security policy that permits precisely
918	+	* the specified permissions.  If there is no current security
919	+	* manager, a temporary one is set for the duration of the
920	+	* Runnable.  We require that any security manager permit
921	+	* getPolicy/setPolicy.
922	+	*/
923	+	public void runWithSecurityManagerWithPermissions(Runnable r,
924	+	Permission... permissions) {
925	+	SecurityManager sm = System.getSecurityManager();
926	+	if (sm == null) {
927		Policy savedPolicy = Policy.getPolicy();
928		try {
929		Policy.setPolicy(permissivePolicy());
930		System.setSecurityManager(new SecurityManager());
931	<	runWithPermissions(r, permissions);
931	>	runWithSecurityManagerWithPermissions(r, permissions);
932		} finally {
933		System.setSecurityManager(null);
934		Policy.setPolicy(savedPolicy);
#	Line 555 | Line 976 | public class JSR166TestCase extends Test
976		return perms.implies(p);
977		}
978		public void refresh() {}
979	+	public String toString() {
980	+	List<Permission> ps = new ArrayList<Permission>();
981	+	for (Enumeration<Permission> e = perms.elements(); e.hasMoreElements();)
982	+	ps.add(e.nextElement());
983	+	return "AdjustablePolicy with permissions " + ps;
984	+	}
985		}
986
987		/**
#	Line 582 | Line 1009 | public class JSR166TestCase extends Test
1009		*/
1010		void sleep(long millis) {
1011		try {
1012	<	Thread.sleep(millis);
1013	<	} catch (InterruptedException ie) {
1012	>	delay(millis);
1013	>	} catch (InterruptedException fail) {
1014		AssertionFailedError afe =
1015		new AssertionFailedError("Unexpected InterruptedException");
1016	<	afe.initCause(ie);
1016	>	afe.initCause(fail);
1017		throw afe;
1018		}
1019		}
1020
1021		/**
1022	<	* Sleeps until the timeout has elapsed, or interrupted.
1023	<	* Does <em>NOT</em> throw InterruptedException.
1022	>	* Spin-waits up to the specified number of milliseconds for the given
1023	>	* thread to enter a wait state: BLOCKED, WAITING, or TIMED_WAITING.
1024		*/
1025	<	void sleepTillInterrupted(long timeoutMillis) {
1025	>	void waitForThreadToEnterWaitState(Thread thread, long timeoutMillis) {
1026	>	long startTime = System.nanoTime();
1027	>	for (;;) {
1028	>	Thread.State s = thread.getState();
1029	>	if (s == Thread.State.BLOCKED ||
1030	>	s == Thread.State.WAITING ||
1031	>	s == Thread.State.TIMED_WAITING)
1032	>	return;
1033	>	else if (s == Thread.State.TERMINATED)
1034	>	fail("Unexpected thread termination");
1035	>	else if (millisElapsedSince(startTime) > timeoutMillis) {
1036	>	threadAssertTrue(thread.isAlive());
1037	>	return;
1038	>	}
1039	>	Thread.yield();
1040	>	}
1041	>	}
1042	>
1043	>	/**
1044	>	* Waits up to LONG_DELAY_MS for the given thread to enter a wait
1045	>	* state: BLOCKED, WAITING, or TIMED_WAITING.
1046	>	*/
1047	>	void waitForThreadToEnterWaitState(Thread thread) {
1048	>	waitForThreadToEnterWaitState(thread, LONG_DELAY_MS);
1049	>	}
1050	>
1051	>	/**
1052	>	* Returns the number of milliseconds since time given by
1053	>	* startNanoTime, which must have been previously returned from a
1054	>	* call to {@link System#nanoTime()}.
1055	>	*/
1056	>	static long millisElapsedSince(long startNanoTime) {
1057	>	return NANOSECONDS.toMillis(System.nanoTime() - startNanoTime);
1058	>	}
1059	>
1060	>	//     void assertTerminatesPromptly(long timeoutMillis, Runnable r) {
1061	>	//         long startTime = System.nanoTime();
1062	>	//         try {
1063	>	//             r.run();
1064	>	//         } catch (Throwable fail) { threadUnexpectedException(fail); }
1065	>	//         if (millisElapsedSince(startTime) > timeoutMillis/2)
1066	>	//             throw new AssertionFailedError("did not return promptly");
1067	>	//     }
1068	>
1069	>	//     void assertTerminatesPromptly(Runnable r) {
1070	>	//         assertTerminatesPromptly(LONG_DELAY_MS/2, r);
1071	>	//     }
1072	>
1073	>	/**
1074	>	* Checks that timed f.get() returns the expected value, and does not
1075	>	* wait for the timeout to elapse before returning.
1076	>	*/
1077	>	<T> void checkTimedGet(Future<T> f, T expectedValue, long timeoutMillis) {
1078	>	long startTime = System.nanoTime();
1079		try {
1080	<	Thread.sleep(timeoutMillis);
1081	<	} catch (InterruptedException wakeup) {}
1080	>	assertEquals(expectedValue, f.get(timeoutMillis, MILLISECONDS));
1081	>	} catch (Throwable fail) { threadUnexpectedException(fail); }
1082	>	if (millisElapsedSince(startTime) > timeoutMillis/2)
1083	>	throw new AssertionFailedError("timed get did not return promptly");
1084	>	}
1085	>
1086	>	<T> void checkTimedGet(Future<T> f, T expectedValue) {
1087	>	checkTimedGet(f, expectedValue, LONG_DELAY_MS);
1088		}
1089
1090		/**
#	Line 619 | Line 1105 | public class JSR166TestCase extends Test
1105		void awaitTermination(Thread t, long timeoutMillis) {
1106		try {
1107		t.join(timeoutMillis);
1108	<	} catch (InterruptedException ie) {
1109	<	threadUnexpectedException(ie);
1108	>	} catch (InterruptedException fail) {
1109	>	threadUnexpectedException(fail);
1110		} finally {
1111	<	if (t.isAlive()) {
1111	>	if (t.getState() != Thread.State.TERMINATED) {
1112		t.interrupt();
1113		fail("Test timed out");
1114		}
1115		}
1116		}
1117
1118	+	/**
1119	+	* Waits for LONG_DELAY_MS milliseconds for the thread to
1120	+	* terminate (using {@link Thread#join(long)}), else interrupts
1121	+	* the thread (in the hope that it may terminate later) and fails.
1122	+	*/
1123	+	void awaitTermination(Thread t) {
1124	+	awaitTermination(t, LONG_DELAY_MS);
1125	+	}
1126	+
1127		// Some convenient Runnable classes
1128
1129		public abstract class CheckedRunnable implements Runnable {
#	Line 637 | Line 1132 | public class JSR166TestCase extends Test
1132		public final void run() {
1133		try {
1134		realRun();
1135	<	} catch (Throwable t) {
1136	<	threadUnexpectedException(t);
1135	>	} catch (Throwable fail) {
1136	>	threadUnexpectedException(fail);
1137		}
1138		}
1139		}
#	Line 691 | Line 1186 | public class JSR166TestCase extends Test
1186		realRun();
1187		threadShouldThrow("InterruptedException");
1188		} catch (InterruptedException success) {
1189	<	} catch (Throwable t) {
1190	<	threadUnexpectedException(t);
1189	>	threadAssertFalse(Thread.interrupted());
1190	>	} catch (Throwable fail) {
1191	>	threadUnexpectedException(fail);
1192		}
1193		}
1194		}
#	Line 703 | Line 1199 | public class JSR166TestCase extends Test
1199		public final T call() {
1200		try {
1201		return realCall();
1202	<	} catch (Throwable t) {
1203	<	threadUnexpectedException(t);
1202	>	} catch (Throwable fail) {
1203	>	threadUnexpectedException(fail);
1204		return null;
1205		}
1206		}
#	Line 720 | Line 1216 | public class JSR166TestCase extends Test
1216		threadShouldThrow("InterruptedException");
1217		return result;
1218		} catch (InterruptedException success) {
1219	<	} catch (Throwable t) {
1220	<	threadUnexpectedException(t);
1219	>	threadAssertFalse(Thread.interrupted());
1220	>	} catch (Throwable fail) {
1221	>	threadUnexpectedException(fail);
1222		}
1223		return null;
1224		}
#	Line 738 | Line 1235 | public class JSR166TestCase extends Test
1235		public static final String TEST_STRING = "a test string";
1236
1237		public static class StringTask implements Callable<String> {
1238	<	public String call() { return TEST_STRING; }
1238	>	final String value;
1239	>	public StringTask() { this(TEST_STRING); }
1240	>	public StringTask(String value) { this.value = value; }
1241	>	public String call() { return value; }
1242		}
1243
1244		public Callable<String> latchAwaitingStringTask(final CountDownLatch latch) {
1245		return new CheckedCallable<String>() {
1246	<	public String realCall() {
1246	>	protected String realCall() {
1247		try {
1248		latch.await();
1249		} catch (InterruptedException quittingTime) {}
#	Line 751 | Line 1251 | public class JSR166TestCase extends Test
1251		}};
1252		}
1253
1254	+	public Runnable awaiter(final CountDownLatch latch) {
1255	+	return new CheckedRunnable() {
1256	+	public void realRun() throws InterruptedException {
1257	+	await(latch);
1258	+	}};
1259	+	}
1260	+
1261	+	public void await(CountDownLatch latch) {
1262	+	try {
1263	+	assertTrue(latch.await(LONG_DELAY_MS, MILLISECONDS));
1264	+	} catch (Throwable fail) {
1265	+	threadUnexpectedException(fail);
1266	+	}
1267	+	}
1268	+
1269	+	public void await(Semaphore semaphore) {
1270	+	try {
1271	+	assertTrue(semaphore.tryAcquire(LONG_DELAY_MS, MILLISECONDS));
1272	+	} catch (Throwable fail) {
1273	+	threadUnexpectedException(fail);
1274	+	}
1275	+	}
1276	+
1277	+	//     /**
1278	+	//      * Spin-waits up to LONG_DELAY_MS until flag becomes true.
1279	+	//      */
1280	+	//     public void await(AtomicBoolean flag) {
1281	+	//         await(flag, LONG_DELAY_MS);
1282	+	//     }
1283	+
1284	+	//     /**
1285	+	//      * Spin-waits up to the specified timeout until flag becomes true.
1286	+	//      */
1287	+	//     public void await(AtomicBoolean flag, long timeoutMillis) {
1288	+	//         long startTime = System.nanoTime();
1289	+	//         while (!flag.get()) {
1290	+	//             if (millisElapsedSince(startTime) > timeoutMillis)
1291	+	//                 throw new AssertionFailedError("timed out");
1292	+	//             Thread.yield();
1293	+	//         }
1294	+	//     }
1295	+
1296		public static class NPETask implements Callable<String> {
1297		public String call() { throw new NullPointerException(); }
1298		}
#	Line 761 | Line 1303 | public class JSR166TestCase extends Test
1303
1304		public class ShortRunnable extends CheckedRunnable {
1305		protected void realRun() throws Throwable {
1306	<	Thread.sleep(SHORT_DELAY_MS);
1306	>	delay(SHORT_DELAY_MS);
1307		}
1308		}
1309
1310		public class ShortInterruptedRunnable extends CheckedInterruptedRunnable {
1311		protected void realRun() throws InterruptedException {
1312	<	Thread.sleep(SHORT_DELAY_MS);
1312	>	delay(SHORT_DELAY_MS);
1313		}
1314		}
1315
1316		public class SmallRunnable extends CheckedRunnable {
1317		protected void realRun() throws Throwable {
1318	<	Thread.sleep(SMALL_DELAY_MS);
1318	>	delay(SMALL_DELAY_MS);
1319		}
1320		}
1321
1322		public class SmallPossiblyInterruptedRunnable extends CheckedRunnable {
1323		protected void realRun() {
1324		try {
1325	<	Thread.sleep(SMALL_DELAY_MS);
1325	>	delay(SMALL_DELAY_MS);
1326		} catch (InterruptedException ok) {}
1327		}
1328		}
1329
1330		public class SmallCallable extends CheckedCallable {
1331		protected Object realCall() throws InterruptedException {
1332	<	Thread.sleep(SMALL_DELAY_MS);
1332	>	delay(SMALL_DELAY_MS);
1333		return Boolean.TRUE;
1334		}
1335		}
1336
1337		public class MediumRunnable extends CheckedRunnable {
1338		protected void realRun() throws Throwable {
1339	<	Thread.sleep(MEDIUM_DELAY_MS);
1339	>	delay(MEDIUM_DELAY_MS);
1340		}
1341		}
1342
1343		public class MediumInterruptedRunnable extends CheckedInterruptedRunnable {
1344		protected void realRun() throws InterruptedException {
1345	<	Thread.sleep(MEDIUM_DELAY_MS);
1345	>	delay(MEDIUM_DELAY_MS);
1346		}
1347		}
1348
1349	+	public Runnable possiblyInterruptedRunnable(final long timeoutMillis) {
1350	+	return new CheckedRunnable() {
1351	+	protected void realRun() {
1352	+	try {
1353	+	delay(timeoutMillis);
1354	+	} catch (InterruptedException ok) {}
1355	+	}};
1356	+	}
1357	+
1358		public class MediumPossiblyInterruptedRunnable extends CheckedRunnable {
1359		protected void realRun() {
1360		try {
1361	<	Thread.sleep(MEDIUM_DELAY_MS);
1361	>	delay(MEDIUM_DELAY_MS);
1362		} catch (InterruptedException ok) {}
1363		}
1364		}
#	Line 815 | Line 1366 | public class JSR166TestCase extends Test
1366		public class LongPossiblyInterruptedRunnable extends CheckedRunnable {
1367		protected void realRun() {
1368		try {
1369	<	Thread.sleep(LONG_DELAY_MS);
1369	>	delay(LONG_DELAY_MS);
1370		} catch (InterruptedException ok) {}
1371		}
1372		}
#	Line 839 | Line 1390 | public class JSR166TestCase extends Test
1390		public boolean isDone() { return done; }
1391		public void run() {
1392		try {
1393	<	Thread.sleep(timeoutMillis);
1393	>	delay(timeoutMillis);
1394		done = true;
1395		} catch (InterruptedException ok) {}
1396		}
#	Line 850 | Line 1401 | public class JSR166TestCase extends Test
1401		public volatile boolean done = false;
1402		public void run() {
1403		try {
1404	<	Thread.sleep(SHORT_DELAY_MS);
1404	>	delay(SHORT_DELAY_MS);
1405		done = true;
1406		} catch (InterruptedException ok) {}
1407		}
#	Line 860 | Line 1411 | public class JSR166TestCase extends Test
1411		public volatile boolean done = false;
1412		public void run() {
1413		try {
1414	<	Thread.sleep(SMALL_DELAY_MS);
1414	>	delay(SMALL_DELAY_MS);
1415		done = true;
1416		} catch (InterruptedException ok) {}
1417		}
#	Line 870 | Line 1421 | public class JSR166TestCase extends Test
1421		public volatile boolean done = false;
1422		public void run() {
1423		try {
1424	<	Thread.sleep(MEDIUM_DELAY_MS);
1424	>	delay(MEDIUM_DELAY_MS);
1425		done = true;
1426		} catch (InterruptedException ok) {}
1427		}
#	Line 880 | Line 1431 | public class JSR166TestCase extends Test
1431		public volatile boolean done = false;
1432		public void run() {
1433		try {
1434	<	Thread.sleep(LONG_DELAY_MS);
1434	>	delay(LONG_DELAY_MS);
1435		done = true;
1436		} catch (InterruptedException ok) {}
1437		}
#	Line 897 | Line 1448 | public class JSR166TestCase extends Test
1448		public volatile boolean done = false;
1449		public Object call() {
1450		try {
1451	<	Thread.sleep(SMALL_DELAY_MS);
1451	>	delay(SMALL_DELAY_MS);
1452		done = true;
1453		} catch (InterruptedException ok) {}
1454		return Boolean.TRUE;
#	Line 910 | Line 1461 | public class JSR166TestCase extends Test
1461		public abstract class CheckedRecursiveAction extends RecursiveAction {
1462		protected abstract void realCompute() throws Throwable;
1463
1464	<	public final void compute() {
1464	>	@Override protected final void compute() {
1465		try {
1466		realCompute();
1467	<	} catch (Throwable t) {
1468	<	threadUnexpectedException(t);
1467	>	} catch (Throwable fail) {
1468	>	threadUnexpectedException(fail);
1469		}
1470		}
1471		}
#	Line 925 | Line 1476 | public class JSR166TestCase extends Test
1476		public abstract class CheckedRecursiveTask<T> extends RecursiveTask<T> {
1477		protected abstract T realCompute() throws Throwable;
1478
1479	<	public final T compute() {
1479	>	@Override protected final T compute() {
1480		try {
1481		return realCompute();
1482	<	} catch (Throwable t) {
1483	<	threadUnexpectedException(t);
1482	>	} catch (Throwable fail) {
1483	>	threadUnexpectedException(fail);
1484		return null;
1485		}
1486		}
#	Line 944 | Line 1495 | public class JSR166TestCase extends Test
1495		}
1496
1497		/**
1498	<	* A CyclicBarrier that fails with AssertionFailedErrors instead
1499	<	* of throwing checked exceptions.
1498	>	* A CyclicBarrier that uses timed await and fails with
1499	>	* AssertionFailedErrors instead of throwing checked exceptions.
1500		*/
1501		public class CheckedBarrier extends CyclicBarrier {
1502		public CheckedBarrier(int parties) { super(parties); }
1503
1504		public int await() {
1505		try {
1506	<	return super.await();
1507	<	} catch (Exception e) {
1506	>	return super.await(2 * LONG_DELAY_MS, MILLISECONDS);
1507	>	} catch (TimeoutException timedOut) {
1508	>	throw new AssertionFailedError("timed out");
1509	>	} catch (Exception fail) {
1510		AssertionFailedError afe =
1511	<	new AssertionFailedError("Unexpected exception: " + e);
1512	<	afe.initCause(e);
1511	>	new AssertionFailedError("Unexpected exception: " + fail);
1512	>	afe.initCause(fail);
1513		throw afe;
1514		}
1515		}
1516		}
1517
1518	+	void checkEmpty(BlockingQueue q) {
1519	+	try {
1520	+	assertTrue(q.isEmpty());
1521	+	assertEquals(0, q.size());
1522	+	assertNull(q.peek());
1523	+	assertNull(q.poll());
1524	+	assertNull(q.poll(0, MILLISECONDS));
1525	+	assertEquals(q.toString(), "[]");
1526	+	assertTrue(Arrays.equals(q.toArray(), new Object[0]));
1527	+	assertFalse(q.iterator().hasNext());
1528	+	try {
1529	+	q.element();
1530	+	shouldThrow();
1531	+	} catch (NoSuchElementException success) {}
1532	+	try {
1533	+	q.iterator().next();
1534	+	shouldThrow();
1535	+	} catch (NoSuchElementException success) {}
1536	+	try {
1537	+	q.remove();
1538	+	shouldThrow();
1539	+	} catch (NoSuchElementException success) {}
1540	+	} catch (InterruptedException fail) { threadUnexpectedException(fail); }
1541	+	}
1542	+
1543	+	void assertSerialEquals(Object x, Object y) {
1544	+	assertTrue(Arrays.equals(serialBytes(x), serialBytes(y)));
1545	+	}
1546	+
1547	+	void assertNotSerialEquals(Object x, Object y) {
1548	+	assertFalse(Arrays.equals(serialBytes(x), serialBytes(y)));
1549	+	}
1550	+
1551	+	byte[] serialBytes(Object o) {
1552	+	try {
1553	+	ByteArrayOutputStream bos = new ByteArrayOutputStream();
1554	+	ObjectOutputStream oos = new ObjectOutputStream(bos);
1555	+	oos.writeObject(o);
1556	+	oos.flush();
1557	+	oos.close();
1558	+	return bos.toByteArray();
1559	+	} catch (Throwable fail) {
1560	+	threadUnexpectedException(fail);
1561	+	return new byte[0];
1562	+	}
1563	+	}
1564	+
1565	+	@SuppressWarnings("unchecked")
1566	+	<T> T serialClone(T o) {
1567	+	try {
1568	+	ObjectInputStream ois = new ObjectInputStream
1569	+	(new ByteArrayInputStream(serialBytes(o)));
1570	+	T clone = (T) ois.readObject();
1571	+	assertSame(o.getClass(), clone.getClass());
1572	+	return clone;
1573	+	} catch (Throwable fail) {
1574	+	threadUnexpectedException(fail);
1575	+	return null;
1576	+	}
1577	+	}
1578	+
1579	+	public void assertThrows(Class<? extends Throwable> expectedExceptionClass,
1580	+	Runnable... throwingActions) {
1581	+	for (Runnable throwingAction : throwingActions) {
1582	+	boolean threw = false;
1583	+	try { throwingAction.run(); }
1584	+	catch (Throwable t) {
1585	+	threw = true;
1586	+	if (!expectedExceptionClass.isInstance(t)) {
1587	+	AssertionFailedError afe =
1588	+	new AssertionFailedError
1589	+	("Expected " + expectedExceptionClass.getName() +
1590	+	", got " + t.getClass().getName());
1591	+	afe.initCause(t);
1592	+	threadUnexpectedException(afe);
1593	+	}
1594	+	}
1595	+	if (!threw)
1596	+	shouldThrow(expectedExceptionClass.getName());
1597	+	}
1598	+	}
1599	+
1600	+	public void assertIteratorExhausted(Iterator<?> it) {
1601	+	try {
1602	+	it.next();
1603	+	shouldThrow();
1604	+	} catch (NoSuchElementException success) {}
1605	+	assertFalse(it.hasNext());
1606	+	}
1607		}

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