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

Comparing jsr166/src/test/tck/JSR166TestCase.java (file contents):
Revision 1.11 by dl, Tue Dec 23 19:40:24 2003 UTC vs.
Revision 1.168 by jsr166, Mon Oct 5 22:53:25 2015 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.*;
12	<	import java.io.*;
13	<	import java.security.*;
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;
26	>	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,
65		* utility methods and classes, as well as a simple framework for
66		* helping to make sure that assertions failing in generated threads
67		* cause the associated test that generated them to itself fail (which
68	<	* JUnit doe not otherwise arrange).  The rules for creating such
68	>	* JUnit does not otherwise arrange).  The rules for creating such
69		* tests are:
70		*
71		* <ol>
72		*
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	<	* <tt>fail</tt>, <tt>assertTrue</tt>, etc.) It is OK (but not
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
82	<	* to invoke <tt>super.setUp</tt> and <tt>super.tearDown</tt> within
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 <tt>
87	<	* SHORT_DELAY_MS</tt>, <tt> SMALL_DELAY_MS</tt>, <tt> MEDIUM_DELAY_MS</tt>,
88	<	* <tt> LONG_DELAY_MS</tt>. The idea here is that a SHORT is always
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},
88	>	* {@code LONG_DELAY_MS}. The idea here is that a SHORT is always
89		* discriminable from zero time, and always allows enough time for the
90		* small amounts of computation (creating a thread, calling a few
91		* methods, etc) needed to reach a timeout point. Similarly, a SMALL
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
98	<	* method (or <tt>fail</tt> to do so) before returning from the
99	<	* method. The <tt> joinPool</tt> method can be used to do this when
100	<	* using Executors.</li>
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.
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>
114	<	*
115	<	* <li> The documentation style for testcases is to provide as javadoc
113	>	* isolation.
114	>	*
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 <tt>main</tt> 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		*/
136		public class JSR166TestCase extends TestCase {
137	+	private static final boolean useSecurityManager =
138	+	Boolean.getBoolean("jsr166.useSecurityManager");
139	+
140	+	protected static final boolean expensiveTests =
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	+	*/
154	+	private static final boolean profileTests =
155	+	Boolean.getBoolean("jsr166.profileTests");
156	+
157	+	/**
158	+	* The number of milliseconds that tests are permitted for
159	+	* execution without being reported, when profileTests is set.
160	+	*/
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	+	dumpTestThreads();
204	+	// one stack dump is probably enough; more would be spam
205	+	break;
206	+	}
207	+	lastTestCase = currentTestCase;
208	+	}}};
209	+	Thread thread = new Thread(checkForWedgedTest, "checkForWedgedTest");
210	+	thread.setDaemon(true);
211	+	thread.start();
212	+	}
213	+
214	+	public void runBare() throws Throwable {
215	+	currentTestCase = this;
216	+	if (methodFilter == null
217	+	|| methodFilter.matcher(toString()).find())
218	+	super.runBare();
219	+	}
220	+
221	+	protected void runTest() throws Throwable {
222	+	for (int i = 0; i < runsPerTest; i++) {
223	+	if (profileTests)
224	+	runTestProfiled();
225	+	else
226	+	super.runTest();
227	+	}
228	+	}
229	+
230	+	protected void runTestProfiled() throws Throwable {
231	+	for (int i = 0; i < 2; i++) {
232	+	long startTime = System.nanoTime();
233	+	super.runTest();
234	+	long elapsedMillis = millisElapsedSince(startTime);
235	+	if (elapsedMillis < profileThreshold)
236	+	break;
237	+	// Never report first run of any test; treat it as a
238	+	// warmup run, notably to trigger all needed classloading,
239	+	if (i > 0)
240	+	System.out.printf("%n%s: %d%n", toString(), elapsedMillis);
241	+	}
242	+	}
243	+
244		/**
245	<	* Runs all JSR166 unit tests using junit.textui.TestRunner
246	<	*/
247	<	public static void main (String[] args) {
248	<	junit.textui.TestRunner.run (suite());
245	>	* Runs all JSR166 unit tests using junit.textui.TestRunner.
246	>	*/
247	>	public static void main(String[] args) {
248	>	main(suite(), args);
249		}
250
251		/**
252	<	* Collects all JSR166 unit tests as one suite
253	<	*/
254	<	public static Test suite ( ) {
255	<	TestSuite suite = new TestSuite("JSR166 Unit Tests");
256	<
257	<	suite.addTest(new TestSuite(AbstractExecutorServiceTest.class));
258	<	suite.addTest(new TestSuite(ArrayBlockingQueueTest.class));
259	<	suite.addTest(new TestSuite(AtomicBooleanTest.class));
260	<	suite.addTest(new TestSuite(AtomicIntegerArrayTest.class));
261	<	suite.addTest(new TestSuite(AtomicIntegerFieldUpdaterTest.class));
262	<	suite.addTest(new TestSuite(AtomicIntegerTest.class));
263	<	suite.addTest(new TestSuite(AtomicLongArrayTest.class));
264	<	suite.addTest(new TestSuite(AtomicLongFieldUpdaterTest.class));
265	<	suite.addTest(new TestSuite(AtomicLongTest.class));
266	<	suite.addTest(new TestSuite(AtomicMarkableReferenceTest.class));
267	<	suite.addTest(new TestSuite(AtomicReferenceArrayTest.class));
268	<	suite.addTest(new TestSuite(AtomicReferenceFieldUpdaterTest.class));
269	<	suite.addTest(new TestSuite(AtomicReferenceTest.class));
270	<	suite.addTest(new TestSuite(AtomicStampedReferenceTest.class));
271	<	suite.addTest(new TestSuite(ConcurrentHashMapTest.class));
272	<	suite.addTest(new TestSuite(ConcurrentLinkedQueueTest.class));
273	<	suite.addTest(new TestSuite(CopyOnWriteArrayListTest.class));
274	<	suite.addTest(new TestSuite(CopyOnWriteArraySetTest.class));
275	<	suite.addTest(new TestSuite(CountDownLatchTest.class));
276	<	suite.addTest(new TestSuite(CyclicBarrierTest.class));
277	<	suite.addTest(new TestSuite(DelayQueueTest.class));
278	<	suite.addTest(new TestSuite(ExchangerTest.class));
279	<	suite.addTest(new TestSuite(ExecutorsTest.class));
124	<	suite.addTest(new TestSuite(ExecutorCompletionServiceTest.class));
125	<	suite.addTest(new TestSuite(FutureTaskTest.class));
126	<	suite.addTest(new TestSuite(LinkedBlockingQueueTest.class));
127	<	suite.addTest(new TestSuite(LinkedListTest.class));
128	<	suite.addTest(new TestSuite(LockSupportTest.class));
129	<	suite.addTest(new TestSuite(PriorityBlockingQueueTest.class));
130	<	suite.addTest(new TestSuite(PriorityQueueTest.class));
131	<	suite.addTest(new TestSuite(ReentrantLockTest.class));
132	<	suite.addTest(new TestSuite(ReentrantReadWriteLockTest.class));
133	<	suite.addTest(new TestSuite(ScheduledExecutorTest.class));
134	<	suite.addTest(new TestSuite(SemaphoreTest.class));
135	<	suite.addTest(new TestSuite(SynchronousQueueTest.class));
136	<	suite.addTest(new TestSuite(SystemTest.class));
137	<	suite.addTest(new TestSuite(ThreadLocalTest.class));
138	<	suite.addTest(new TestSuite(ThreadPoolExecutorTest.class));
139	<	suite.addTest(new TestSuite(ThreadTest.class));
140	<	suite.addTest(new TestSuite(TimeUnitTest.class));
141	<
252	>	* Runs all unit tests in the given test suite.
253	>	* Actual behavior influenced by jsr166.* system properties.
254	>	*/
255	>	static void main(Test suite, String[] args) {
256	>	if (useSecurityManager) {
257	>	System.err.println("Setting a permissive security manager");
258	>	Policy.setPolicy(permissivePolicy());
259	>	System.setSecurityManager(new SecurityManager());
260	>	}
261	>	for (int i = 0; i < suiteRuns; i++) {
262	>	TestResult result = junit.textui.TestRunner.run(suite);
263	>	if (!result.wasSuccessful())
264	>	System.exit(1);
265	>	System.gc();
266	>	System.runFinalization();
267	>	}
268	>	}
269	>
270	>	public static TestSuite newTestSuite(Object... suiteOrClasses) {
271	>	TestSuite suite = new TestSuite();
272	>	for (Object suiteOrClass : suiteOrClasses) {
273	>	if (suiteOrClass instanceof TestSuite)
274	>	suite.addTest((TestSuite) suiteOrClass);
275	>	else if (suiteOrClass instanceof Class)
276	>	suite.addTest(new TestSuite((Class<?>) suiteOrClass));
277	>	else
278	>	throw new ClassCastException("not a test suite or class");
279	>	}
280		return suite;
281		}
282
283	+	public static void addNamedTestClasses(TestSuite suite,
284	+	String... testClassNames) {
285	+	for (String testClassName : testClassNames) {
286	+	try {
287	+	Class<?> testClass = Class.forName(testClassName);
288	+	Method m = testClass.getDeclaredMethod("suite",
289	+	new Class<?>[0]);
290	+	suite.addTest(newTestSuite((Test)m.invoke(null)));
291	+	} catch (Exception e) {
292	+	throw new Error("Missing test class", e);
293	+	}
294	+	}
295	+	}
296	+
297	+	public static final double JAVA_CLASS_VERSION;
298	+	public static final String JAVA_SPECIFICATION_VERSION;
299	+	static {
300	+	try {
301	+	JAVA_CLASS_VERSION = java.security.AccessController.doPrivileged(
302	+	new java.security.PrivilegedAction<Double>() {
303	+	public Double run() {
304	+	return Double.valueOf(System.getProperty("java.class.version"));}});
305	+	JAVA_SPECIFICATION_VERSION = java.security.AccessController.doPrivileged(
306	+	new java.security.PrivilegedAction<String>() {
307	+	public String run() {
308	+	return System.getProperty("java.specification.version");}});
309	+	} catch (Throwable t) {
310	+	throw new Error(t);
311	+	}
312	+	}
313	+
314	+	public static boolean atLeastJava6() { return JAVA_CLASS_VERSION >= 50.0; }
315	+	public static boolean atLeastJava7() { return JAVA_CLASS_VERSION >= 51.0; }
316	+	public static boolean atLeastJava8() { return JAVA_CLASS_VERSION >= 52.0; }
317	+	public static boolean atLeastJava9() {
318	+	return JAVA_CLASS_VERSION >= 53.0
319	+	// As of 2015-09, java9 still uses 52.0 class file version
320	+	|| JAVA_SPECIFICATION_VERSION.matches("^(1\\.)?(9|[0-9][0-9])$");
321	+	}
322	+	public static boolean atLeastJava10() {
323	+	return JAVA_CLASS_VERSION >= 54.0
324	+	|| JAVA_SPECIFICATION_VERSION.matches("^(1\\.)?[0-9][0-9]$");
325	+	}
326	+
327	+	/**
328	+	* Collects all JSR166 unit tests as one suite.
329	+	*/
330	+	public static Test suite() {
331	+	// Java7+ test classes
332	+	TestSuite suite = newTestSuite(
333	+	ForkJoinPoolTest.suite(),
334	+	ForkJoinTaskTest.suite(),
335	+	RecursiveActionTest.suite(),
336	+	RecursiveTaskTest.suite(),
337	+	LinkedTransferQueueTest.suite(),
338	+	PhaserTest.suite(),
339	+	ThreadLocalRandomTest.suite(),
340	+	AbstractExecutorServiceTest.suite(),
341	+	AbstractQueueTest.suite(),
342	+	AbstractQueuedSynchronizerTest.suite(),
343	+	AbstractQueuedLongSynchronizerTest.suite(),
344	+	ArrayBlockingQueueTest.suite(),
345	+	ArrayDequeTest.suite(),
346	+	AtomicBooleanTest.suite(),
347	+	AtomicIntegerArrayTest.suite(),
348	+	AtomicIntegerFieldUpdaterTest.suite(),
349	+	AtomicIntegerTest.suite(),
350	+	AtomicLongArrayTest.suite(),
351	+	AtomicLongFieldUpdaterTest.suite(),
352	+	AtomicLongTest.suite(),
353	+	AtomicMarkableReferenceTest.suite(),
354	+	AtomicReferenceArrayTest.suite(),
355	+	AtomicReferenceFieldUpdaterTest.suite(),
356	+	AtomicReferenceTest.suite(),
357	+	AtomicStampedReferenceTest.suite(),
358	+	ConcurrentHashMapTest.suite(),
359	+	ConcurrentLinkedDequeTest.suite(),
360	+	ConcurrentLinkedQueueTest.suite(),
361	+	ConcurrentSkipListMapTest.suite(),
362	+	ConcurrentSkipListSubMapTest.suite(),
363	+	ConcurrentSkipListSetTest.suite(),
364	+	ConcurrentSkipListSubSetTest.suite(),
365	+	CopyOnWriteArrayListTest.suite(),
366	+	CopyOnWriteArraySetTest.suite(),
367	+	CountDownLatchTest.suite(),
368	+	CyclicBarrierTest.suite(),
369	+	DelayQueueTest.suite(),
370	+	EntryTest.suite(),
371	+	ExchangerTest.suite(),
372	+	ExecutorsTest.suite(),
373	+	ExecutorCompletionServiceTest.suite(),
374	+	FutureTaskTest.suite(),
375	+	LinkedBlockingDequeTest.suite(),
376	+	LinkedBlockingQueueTest.suite(),
377	+	LinkedListTest.suite(),
378	+	LockSupportTest.suite(),
379	+	PriorityBlockingQueueTest.suite(),
380	+	PriorityQueueTest.suite(),
381	+	ReentrantLockTest.suite(),
382	+	ReentrantReadWriteLockTest.suite(),
383	+	ScheduledExecutorTest.suite(),
384	+	ScheduledExecutorSubclassTest.suite(),
385	+	SemaphoreTest.suite(),
386	+	SynchronousQueueTest.suite(),
387	+	SystemTest.suite(),
388	+	ThreadLocalTest.suite(),
389	+	ThreadPoolExecutorTest.suite(),
390	+	ThreadPoolExecutorSubclassTest.suite(),
391	+	ThreadTest.suite(),
392	+	TimeUnitTest.suite(),
393	+	TreeMapTest.suite(),
394	+	TreeSetTest.suite(),
395	+	TreeSubMapTest.suite(),
396	+	TreeSubSetTest.suite());
397	+
398	+	// Java8+ test classes
399	+	if (atLeastJava8()) {
400	+	String[] java8TestClassNames = {
401	+	"Atomic8Test",
402	+	"CompletableFutureTest",
403	+	"ConcurrentHashMap8Test",
404	+	"CountedCompleterTest",
405	+	"DoubleAccumulatorTest",
406	+	"DoubleAdderTest",
407	+	"ForkJoinPool8Test",
408	+	"ForkJoinTask8Test",
409	+	"LongAccumulatorTest",
410	+	"LongAdderTest",
411	+	"SplittableRandomTest",
412	+	"StampedLockTest",
413	+	"SubmissionPublisherTest",
414	+	"ThreadLocalRandom8Test",
415	+	};
416	+	addNamedTestClasses(suite, java8TestClassNames);
417	+	}
418	+
419	+	// Java9+ test classes
420	+	if (atLeastJava9()) {
421	+	String[] java9TestClassNames = {
422	+	// Currently empty, but expecting varhandle tests
423	+	};
424	+	addNamedTestClasses(suite, java9TestClassNames);
425	+	}
426	+
427	+	return suite;
428	+	}
429	+
430	+	/** Returns list of junit-style test method names in given class. */
431	+	public static ArrayList<String> testMethodNames(Class<?> testClass) {
432	+	Method[] methods = testClass.getDeclaredMethods();
433	+	ArrayList<String> names = new ArrayList<String>(methods.length);
434	+	for (Method method : methods) {
435	+	if (method.getName().startsWith("test")
436	+	&& Modifier.isPublic(method.getModifiers())
437	+	// method.getParameterCount() requires jdk8+
438	+	&& method.getParameterTypes().length == 0) {
439	+	names.add(method.getName());
440	+	}
441	+	}
442	+	return names;
443	+	}
444	+
445	+	/**
446	+	* Returns junit-style testSuite for the given test class, but
447	+	* parameterized by passing extra data to each test.
448	+	*/
449	+	public static <ExtraData> Test parameterizedTestSuite
450	+	(Class<? extends JSR166TestCase> testClass,
451	+	Class<ExtraData> dataClass,
452	+	ExtraData data) {
453	+	try {
454	+	TestSuite suite = new TestSuite();
455	+	Constructor c =
456	+	testClass.getDeclaredConstructor(dataClass, String.class);
457	+	for (String methodName : testMethodNames(testClass))
458	+	suite.addTest((Test) c.newInstance(data, methodName));
459	+	return suite;
460	+	} catch (Exception e) {
461	+	throw new Error(e);
462	+	}
463	+	}
464	+
465	+	/**
466	+	* Returns junit-style testSuite for the jdk8 extension of the
467	+	* given test class, but parameterized by passing extra data to
468	+	* each test.  Uses reflection to allow compilation in jdk7.
469	+	*/
470	+	public static <ExtraData> Test jdk8ParameterizedTestSuite
471	+	(Class<? extends JSR166TestCase> testClass,
472	+	Class<ExtraData> dataClass,
473	+	ExtraData data) {
474	+	if (atLeastJava8()) {
475	+	String name = testClass.getName();
476	+	String name8 = name.replaceAll("Test$", "8Test");
477	+	if (name.equals(name8)) throw new Error(name);
478	+	try {
479	+	return (Test)
480	+	Class.forName(name8)
481	+	.getMethod("testSuite", new Class[] { dataClass })
482	+	.invoke(null, data);
483	+	} catch (Exception e) {
484	+	throw new Error(e);
485	+	}
486	+	} else {
487	+	return new TestSuite();
488	+	}
489	+	}
490	+
491	+	// Delays for timing-dependent tests, in milliseconds.
492
493		public static long SHORT_DELAY_MS;
494		public static long SMALL_DELAY_MS;
495		public static long MEDIUM_DELAY_MS;
496		public static long LONG_DELAY_MS;
497
151	–
498		/**
499	<	* Return the shortest timed delay. This could
500	<	* be reimplmented to use for example a Property.
501	<	*/
499	>	* Returns the shortest timed delay. This could
500	>	* be reimplemented to use for example a Property.
501	>	*/
502		protected long getShortDelay() {
503	<	return 100;
503	>	return 50;
504		}
505
160	–
506		/**
507	<	* Set delays as multiples of SHORT_DELAY.
507	>	* Sets delays as multiples of SHORT_DELAY.
508		*/
509	<	protected  void setDelays() {
509	>	protected void setDelays() {
510		SHORT_DELAY_MS = getShortDelay();
511	<	SMALL_DELAY_MS = SHORT_DELAY_MS * 5;
511	>	SMALL_DELAY_MS  = SHORT_DELAY_MS * 5;
512		MEDIUM_DELAY_MS = SHORT_DELAY_MS * 10;
513	<	LONG_DELAY_MS = SHORT_DELAY_MS * 50;
513	>	LONG_DELAY_MS   = SHORT_DELAY_MS * 200;
514	>	}
515	>
516	>	/**
517	>	* Returns a timeout in milliseconds to be used in tests that
518	>	* verify that operations block or time out.
519	>	*/
520	>	long timeoutMillis() {
521	>	return SHORT_DELAY_MS / 4;
522	>	}
523	>
524	>	/**
525	>	* Returns a new Date instance representing a time at least
526	>	* delayMillis milliseconds in the future.
527	>	*/
528	>	Date delayedDate(long delayMillis) {
529	>	// Add 1 because currentTimeMillis is known to round into the past.
530	>	return new Date(System.currentTimeMillis() + delayMillis + 1);
531		}
532
533		/**
534	<	* Flag set true if any threadAssert methods fail
534	>	* The first exception encountered if any threadAssertXXX method fails.
535		*/
536	<	volatile boolean threadFailed;
536	>	private final AtomicReference<Throwable> threadFailure
537	>	= new AtomicReference<Throwable>(null);
538
539		/**
540	<	* Initialize test to indicate that no thread assertions have failed
540	>	* Records an exception so that it can be rethrown later in the test
541	>	* harness thread, triggering a test case failure.  Only the first
542	>	* failure is recorded; subsequent calls to this method from within
543	>	* the same test have no effect.
544		*/
545	<	public void setUp() {
545	>	public void threadRecordFailure(Throwable t) {
546	>	System.err.println(t);
547	>	dumpTestThreads();
548	>	threadFailure.compareAndSet(null, t);
549	>	}
550	>
551	>	public void setUp() {
552		setDelays();
553	<	threadFailed = false;
553	>	}
554	>
555	>	void tearDownFail(String format, Object... args) {
556	>	String msg = toString() + ": " + String.format(format, args);
557	>	System.err.println(msg);
558	>	dumpTestThreads();
559	>	throw new AssertionFailedError(msg);
560	>	}
561	>
562	>	/**
563	>	* Extra checks that get done for all test cases.
564	>	*
565	>	* Triggers test case failure if any thread assertions have failed,
566	>	* by rethrowing, in the test harness thread, any exception recorded
567	>	* earlier by threadRecordFailure.
568	>	*
569	>	* Triggers test case failure if interrupt status is set in the main thread.
570	>	*/
571	>	public void tearDown() throws Exception {
572	>	Throwable t = threadFailure.getAndSet(null);
573	>	if (t != null) {
574	>	if (t instanceof Error)
575	>	throw (Error) t;
576	>	else if (t instanceof RuntimeException)
577	>	throw (RuntimeException) t;
578	>	else if (t instanceof Exception)
579	>	throw (Exception) t;
580	>	else {
581	>	AssertionFailedError afe =
582	>	new AssertionFailedError(t.toString());
583	>	afe.initCause(t);
584	>	throw afe;
585	>	}
586	>	}
587	>
588	>	if (Thread.interrupted())
589	>	tearDownFail("interrupt status set in main thread");
590	>
591	>	checkForkJoinPoolThreadLeaks();
592		}
593
594		/**
595	<	* Trigger test case failure if any thread assertions have failed
595	>	* Finds missing PoolCleaners
596		*/
597	<	public void tearDown() {
598	<	assertFalse(threadFailed);
597	>	void checkForkJoinPoolThreadLeaks() throws InterruptedException {
598	>	Thread[] survivors = new Thread[7];
599	>	int count = Thread.enumerate(survivors);
600	>	for (int i = 0; i < count; i++) {
601	>	Thread thread = survivors[i];
602	>	String name = thread.getName();
603	>	if (name.startsWith("ForkJoinPool-")) {
604	>	// give thread some time to terminate
605	>	thread.join(LONG_DELAY_MS);
606	>	if (thread.isAlive())
607	>	tearDownFail("Found leaked ForkJoinPool thread thread=%s",
608	>	thread);
609	>	}
610	>	}
611	>
612	>	if (!ForkJoinPool.commonPool()
613	>	.awaitQuiescence(LONG_DELAY_MS, MILLISECONDS))
614	>	tearDownFail("ForkJoin common pool thread stuck");
615		}
616
617		/**
618	<	* Fail, also setting status to indicate current testcase should fail
619	<	*/
618	>	* Just like fail(reason), but additionally recording (using
619	>	* threadRecordFailure) any AssertionFailedError thrown, so that
620	>	* the current testcase will fail.
621	>	*/
622		public void threadFail(String reason) {
623	<	threadFailed = true;
624	<	fail(reason);
623	>	try {
624	>	fail(reason);
625	>	} catch (AssertionFailedError t) {
626	>	threadRecordFailure(t);
627	>	throw t;
628	>	}
629		}
630
631		/**
632	<	* If expression not true, set status to indicate current testcase
633	<	* should fail
634	<	*/
632	>	* Just like assertTrue(b), but additionally recording (using
633	>	* threadRecordFailure) any AssertionFailedError thrown, so that
634	>	* the current testcase will fail.
635	>	*/
636		public void threadAssertTrue(boolean b) {
637	<	if (!b) {
205	<	threadFailed = true;
637	>	try {
638		assertTrue(b);
639	+	} catch (AssertionFailedError t) {
640	+	threadRecordFailure(t);
641	+	throw t;
642		}
643		}
644
645		/**
646	<	* If expression not false, set status to indicate current testcase
647	<	* should fail
648	<	*/
646	>	* Just like assertFalse(b), but additionally recording (using
647	>	* threadRecordFailure) any AssertionFailedError thrown, so that
648	>	* the current testcase will fail.
649	>	*/
650		public void threadAssertFalse(boolean b) {
651	<	if (b) {
216	<	threadFailed = true;
651	>	try {
652		assertFalse(b);
653	+	} catch (AssertionFailedError t) {
654	+	threadRecordFailure(t);
655	+	throw t;
656		}
657		}
658
659		/**
660	<	* If argument not null, set status to indicate current testcase
661	<	* should fail
662	<	*/
660	>	* Just like assertNull(x), but additionally recording (using
661	>	* threadRecordFailure) any AssertionFailedError thrown, so that
662	>	* the current testcase will fail.
663	>	*/
664		public void threadAssertNull(Object x) {
665	<	if (x != null) {
227	<	threadFailed = true;
665	>	try {
666		assertNull(x);
667	+	} catch (AssertionFailedError t) {
668	+	threadRecordFailure(t);
669	+	throw t;
670		}
671		}
672
673		/**
674	<	* If arguments not equal, set status to indicate current testcase
675	<	* should fail
676	<	*/
674	>	* Just like assertEquals(x, y), but additionally recording (using
675	>	* threadRecordFailure) any AssertionFailedError thrown, so that
676	>	* the current testcase will fail.
677	>	*/
678		public void threadAssertEquals(long x, long y) {
679	<	if (x != y) {
238	<	threadFailed = true;
679	>	try {
680		assertEquals(x, y);
681	+	} catch (AssertionFailedError t) {
682	+	threadRecordFailure(t);
683	+	throw t;
684		}
685		}
686
687		/**
688	<	* If arguments not equal, set status to indicate current testcase
689	<	* should fail
690	<	*/
688	>	* Just like assertEquals(x, y), but additionally recording (using
689	>	* threadRecordFailure) any AssertionFailedError thrown, so that
690	>	* the current testcase will fail.
691	>	*/
692		public void threadAssertEquals(Object x, Object y) {
693	<	if (x != y && (x == null || !x.equals(y))) {
249	<	threadFailed = true;
693	>	try {
694		assertEquals(x, y);
695	+	} catch (AssertionFailedError fail) {
696	+	threadRecordFailure(fail);
697	+	throw fail;
698	+	} catch (Throwable fail) {
699	+	threadUnexpectedException(fail);
700		}
701		}
702
703		/**
704	<	* threadFail with message "should throw exception"
705	<	*/
704	>	* Just like assertSame(x, y), but additionally recording (using
705	>	* threadRecordFailure) any AssertionFailedError thrown, so that
706	>	* the current testcase will fail.
707	>	*/
708	>	public void threadAssertSame(Object x, Object y) {
709	>	try {
710	>	assertSame(x, y);
711	>	} catch (AssertionFailedError fail) {
712	>	threadRecordFailure(fail);
713	>	throw fail;
714	>	}
715	>	}
716	>
717	>	/**
718	>	* Calls threadFail with message "should throw exception".
719	>	*/
720		public void threadShouldThrow() {
721	<	threadFailed = true;
722	<	fail("should throw exception");
721	>	threadFail("should throw exception");
722	>	}
723	>
724	>	/**
725	>	* Calls threadFail with message "should throw" + exceptionName.
726	>	*/
727	>	public void threadShouldThrow(String exceptionName) {
728	>	threadFail("should throw " + exceptionName);
729	>	}
730	>
731	>	/**
732	>	* Records the given exception using {@link #threadRecordFailure},
733	>	* then rethrows the exception, wrapping it in an
734	>	* AssertionFailedError if necessary.
735	>	*/
736	>	public void threadUnexpectedException(Throwable t) {
737	>	threadRecordFailure(t);
738	>	t.printStackTrace();
739	>	if (t instanceof RuntimeException)
740	>	throw (RuntimeException) t;
741	>	else if (t instanceof Error)
742	>	throw (Error) t;
743	>	else {
744	>	AssertionFailedError afe =
745	>	new AssertionFailedError("unexpected exception: " + t);
746	>	afe.initCause(t);
747	>	throw afe;
748	>	}
749	>	}
750	>
751	>	/**
752	>	* Delays, via Thread.sleep, for the given millisecond delay, but
753	>	* if the sleep is shorter than specified, may re-sleep or yield
754	>	* until time elapses.  Ensures that the given time, as measured
755	>	* by System.nanoTime(), has elapsed.
756	>	*/
757	>	static void delay(long millis) throws InterruptedException {
758	>	long nanos = millis * (1000 * 1000);
759	>	final long wakeupTime = System.nanoTime() + nanos;
760	>	do {
761	>	if (millis > 0L)
762	>	Thread.sleep(millis);
763	>	else // too short to sleep
764	>	Thread.yield();
765	>	nanos = wakeupTime - System.nanoTime();
766	>	millis = nanos / (1000 * 1000);
767	>	} while (nanos >= 0L);
768	>	}
769	>
770	>	/**
771	>	* Allows use of try-with-resources with per-test thread pools.
772	>	*/
773	>	class PoolCleaner implements AutoCloseable {
774	>	private final ExecutorService pool;
775	>	public PoolCleaner(ExecutorService pool) { this.pool = pool; }
776	>	public void close() { joinPool(pool); }
777	>	}
778	>
779	>	/**
780	>	* An extension of PoolCleaner that has an action to release the pool.
781	>	*/
782	>	class PoolCleanerWithReleaser extends PoolCleaner {
783	>	private final Runnable releaser;
784	>	public PoolCleanerWithReleaser(ExecutorService pool, Runnable releaser) {
785	>	super(pool);
786	>	this.releaser = releaser;
787	>	}
788	>	public void close() {
789	>	try {
790	>	releaser.run();
791	>	} finally {
792	>	super.close();
793	>	}
794	>	}
795	>	}
796	>
797	>	PoolCleaner cleaner(ExecutorService pool) {
798	>	return new PoolCleaner(pool);
799	>	}
800	>
801	>	PoolCleaner cleaner(ExecutorService pool, Runnable releaser) {
802	>	return new PoolCleanerWithReleaser(pool, releaser);
803	>	}
804	>
805	>	PoolCleaner cleaner(ExecutorService pool, CountDownLatch latch) {
806	>	return new PoolCleanerWithReleaser(pool, releaser(latch));
807	>	}
808	>
809	>	Runnable releaser(final CountDownLatch latch) {
810	>	return new Runnable() { public void run() {
811	>	do { latch.countDown(); }
812	>	while (latch.getCount() > 0);
813	>	}};
814		}
815
816		/**
817	<	* threadFail with message "Unexpected exception"
817	>	* Waits out termination of a thread pool or fails doing so.
818		*/
819	<	public void threadUnexpectedException() {
820	<	threadFailed = true;
821	<	fail("Unexpected exception");
819	>	void joinPool(ExecutorService pool) {
820	>	try {
821	>	pool.shutdown();
822	>	if (!pool.awaitTermination(2 * LONG_DELAY_MS, MILLISECONDS)) {
823	>	try {
824	>	threadFail("ExecutorService " + pool +
825	>	" did not terminate in a timely manner");
826	>	} finally {
827	>	// last resort, for the benefit of subsequent tests
828	>	pool.shutdownNow();
829	>	pool.awaitTermination(MEDIUM_DELAY_MS, MILLISECONDS);
830	>	}
831	>	}
832	>	} catch (SecurityException ok) {
833	>	// Allowed in case test doesn't have privs
834	>	} catch (InterruptedException fail) {
835	>	threadFail("Unexpected InterruptedException");
836	>	}
837		}
838
839	+	/** Like Runnable, but with the freedom to throw anything */
840	+	interface Action { public void run() throws Throwable; }
841
842		/**
843	<	* Wait out termination of a thread pool or fail doing so
843	>	* Runs all the given actions in parallel, failing if any fail.
844	>	* Useful for running multiple variants of tests that are
845	>	* necessarily individually slow because they must block.
846		*/
847	<	public void joinPool(ExecutorService exec) {
847	>	void testInParallel(Action ... actions) {
848	>	ExecutorService pool = Executors.newCachedThreadPool();
849	>	try (PoolCleaner cleaner = cleaner(pool)) {
850	>	ArrayList<Future<?>> futures = new ArrayList<>(actions.length);
851	>	for (final Action action : actions)
852	>	futures.add(pool.submit(new CheckedRunnable() {
853	>	public void realRun() throws Throwable { action.run();}}));
854	>	for (Future<?> future : futures)
855	>	try {
856	>	assertNull(future.get(LONG_DELAY_MS, MILLISECONDS));
857	>	} catch (ExecutionException ex) {
858	>	threadUnexpectedException(ex.getCause());
859	>	} catch (Exception ex) {
860	>	threadUnexpectedException(ex);
861	>	}
862	>	}
863	>	}
864	>
865	>	/**
866	>	* A debugging tool to print stack traces of most threads, as jstack does.
867	>	* Uninteresting threads are filtered out.
868	>	*/
869	>	static void dumpTestThreads() {
870	>	ThreadMXBean threadMXBean = ManagementFactory.getThreadMXBean();
871	>	System.err.println("------ stacktrace dump start ------");
872	>	for (ThreadInfo info : threadMXBean.dumpAllThreads(true, true)) {
873	>	String name = info.getThreadName();
874	>	if ("Signal Dispatcher".equals(name))
875	>	continue;
876	>	if ("Reference Handler".equals(name)
877	>	&& info.getLockName().startsWith("java.lang.ref.Reference$Lock"))
878	>	continue;
879	>	if ("Finalizer".equals(name)
880	>	&& info.getLockName().startsWith("java.lang.ref.ReferenceQueue$Lock"))
881	>	continue;
882	>	if ("checkForWedgedTest".equals(name))
883	>	continue;
884	>	System.err.print(info);
885	>	}
886	>	System.err.println("------ stacktrace dump end ------");
887	>	}
888	>
889	>	/**
890	>	* Checks that thread does not terminate within the default
891	>	* millisecond delay of {@code timeoutMillis()}.
892	>	*/
893	>	void assertThreadStaysAlive(Thread thread) {
894	>	assertThreadStaysAlive(thread, timeoutMillis());
895	>	}
896	>
897	>	/**
898	>	* Checks that thread does not terminate within the given millisecond delay.
899	>	*/
900	>	void assertThreadStaysAlive(Thread thread, long millis) {
901		try {
902	<	exec.shutdown();
903	<	assertTrue(exec.awaitTermination(LONG_DELAY_MS, TimeUnit.MILLISECONDS));
904	<	} catch(InterruptedException ie) {
905	<	fail("Unexpected exception");
902	>	// No need to optimize the failing case via Thread.join.
903	>	delay(millis);
904	>	assertTrue(thread.isAlive());
905	>	} catch (InterruptedException fail) {
906	>	threadFail("Unexpected InterruptedException");
907		}
908		}
909
910	+	/**
911	+	* Checks that the threads do not terminate within the default
912	+	* millisecond delay of {@code timeoutMillis()}.
913	+	*/
914	+	void assertThreadsStayAlive(Thread... threads) {
915	+	assertThreadsStayAlive(timeoutMillis(), threads);
916	+	}
917
918		/**
919	<	* fail with message "should throw exception"
920	<	*/
919	>	* Checks that the threads do not terminate within the given millisecond delay.
920	>	*/
921	>	void assertThreadsStayAlive(long millis, Thread... threads) {
922	>	try {
923	>	// No need to optimize the failing case via Thread.join.
924	>	delay(millis);
925	>	for (Thread thread : threads)
926	>	assertTrue(thread.isAlive());
927	>	} catch (InterruptedException fail) {
928	>	threadFail("Unexpected InterruptedException");
929	>	}
930	>	}
931	>
932	>	/**
933	>	* Checks that future.get times out, with the default timeout of
934	>	* {@code timeoutMillis()}.
935	>	*/
936	>	void assertFutureTimesOut(Future future) {
937	>	assertFutureTimesOut(future, timeoutMillis());
938	>	}
939	>
940	>	/**
941	>	* Checks that future.get times out, with the given millisecond timeout.
942	>	*/
943	>	void assertFutureTimesOut(Future future, long timeoutMillis) {
944	>	long startTime = System.nanoTime();
945	>	try {
946	>	future.get(timeoutMillis, MILLISECONDS);
947	>	shouldThrow();
948	>	} catch (TimeoutException success) {
949	>	} catch (Exception fail) {
950	>	threadUnexpectedException(fail);
951	>	} finally { future.cancel(true); }
952	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
953	>	}
954	>
955	>	/**
956	>	* Fails with message "should throw exception".
957	>	*/
958		public void shouldThrow() {
959		fail("Should throw exception");
960		}
961
962		/**
963	<	* fail with message "Unexpected exception"
963	>	* Fails with message "should throw " + exceptionName.
964		*/
965	<	public void unexpectedException() {
966	<	fail("Unexpected exception");
965	>	public void shouldThrow(String exceptionName) {
966	>	fail("Should throw " + exceptionName);
967		}
968
298	–
969		/**
970		* The number of elements to place in collections, arrays, etc.
971		*/
972	<	static final int SIZE = 20;
972	>	public static final int SIZE = 20;
973
974		// Some convenient Integer constants
975
976	<	static final Integer zero = new Integer(0);
977	<	static final Integer one = new Integer(1);
978	<	static final Integer two = new Integer(2);
979	<	static final Integer three  = new Integer(3);
980	<	static final Integer four  = new Integer(4);
981	<	static final Integer five  = new Integer(5);
982	<	static final Integer six = new Integer(6);
983	<	static final Integer seven = new Integer(7);
984	<	static final Integer eight = new Integer(8);
985	<	static final Integer nine = new Integer(9);
986	<	static final Integer m1  = new Integer(-1);
987	<	static final Integer m2  = new Integer(-2);
988	<	static final Integer m3  = new Integer(-3);
989	<	static final Integer m4 = new Integer(-4);
990	<	static final Integer m5 = new Integer(-5);
991	<	static final Integer m10 = new Integer(-10);
976	>	public static final Integer zero  = new Integer(0);
977	>	public static final Integer one   = new Integer(1);
978	>	public static final Integer two   = new Integer(2);
979	>	public static final Integer three = new Integer(3);
980	>	public static final Integer four  = new Integer(4);
981	>	public static final Integer five  = new Integer(5);
982	>	public static final Integer six   = new Integer(6);
983	>	public static final Integer seven = new Integer(7);
984	>	public static final Integer eight = new Integer(8);
985	>	public static final Integer nine  = new Integer(9);
986	>	public static final Integer m1  = new Integer(-1);
987	>	public static final Integer m2  = new Integer(-2);
988	>	public static final Integer m3  = new Integer(-3);
989	>	public static final Integer m4  = new Integer(-4);
990	>	public static final Integer m5  = new Integer(-5);
991	>	public static final Integer m6  = new Integer(-6);
992	>	public static final Integer m10 = new Integer(-10);
993	>
994	>	/**
995	>	* Runs Runnable r with a security policy that permits precisely
996	>	* the specified permissions.  If there is no current security
997	>	* manager, the runnable is run twice, both with and without a
998	>	* security manager.  We require that any security manager permit
999	>	* getPolicy/setPolicy.
1000	>	*/
1001	>	public void runWithPermissions(Runnable r, Permission... permissions) {
1002	>	SecurityManager sm = System.getSecurityManager();
1003	>	if (sm == null) {
1004	>	r.run();
1005	>	}
1006	>	runWithSecurityManagerWithPermissions(r, permissions);
1007	>	}
1008	>
1009	>	/**
1010	>	* Runs Runnable r with a security policy that permits precisely
1011	>	* the specified permissions.  If there is no current security
1012	>	* manager, a temporary one is set for the duration of the
1013	>	* Runnable.  We require that any security manager permit
1014	>	* getPolicy/setPolicy.
1015	>	*/
1016	>	public void runWithSecurityManagerWithPermissions(Runnable r,
1017	>	Permission... permissions) {
1018	>	SecurityManager sm = System.getSecurityManager();
1019	>	if (sm == null) {
1020	>	Policy savedPolicy = Policy.getPolicy();
1021	>	try {
1022	>	Policy.setPolicy(permissivePolicy());
1023	>	System.setSecurityManager(new SecurityManager());
1024	>	runWithSecurityManagerWithPermissions(r, permissions);
1025	>	} finally {
1026	>	System.setSecurityManager(null);
1027	>	Policy.setPolicy(savedPolicy);
1028	>	}
1029	>	} else {
1030	>	Policy savedPolicy = Policy.getPolicy();
1031	>	AdjustablePolicy policy = new AdjustablePolicy(permissions);
1032	>	Policy.setPolicy(policy);
1033	>
1034	>	try {
1035	>	r.run();
1036	>	} finally {
1037	>	policy.addPermission(new SecurityPermission("setPolicy"));
1038	>	Policy.setPolicy(savedPolicy);
1039	>	}
1040	>	}
1041	>	}
1042
1043	+	/**
1044	+	* Runs a runnable without any permissions.
1045	+	*/
1046	+	public void runWithoutPermissions(Runnable r) {
1047	+	runWithPermissions(r);
1048	+	}
1049
1050		/**
1051		* A security policy where new permissions can be dynamically added
1052		* or all cleared.
1053		*/
1054	<	static class AdjustablePolicy extends java.security.Policy {
1054	>	public static class AdjustablePolicy extends java.security.Policy {
1055		Permissions perms = new Permissions();
1056	<	AdjustablePolicy() { }
1056	>	AdjustablePolicy(Permission... permissions) {
1057	>	for (Permission permission : permissions)
1058	>	perms.add(permission);
1059	>	}
1060		void addPermission(Permission perm) { perms.add(perm); }
1061		void clearPermissions() { perms = new Permissions(); }
1062	<	public PermissionCollection getPermissions(CodeSource cs) {
1063	<	return perms;
1064	<	}
1065	<	public PermissionCollection getPermissions(ProtectionDomain pd) {
1066	<	return perms;
1067	<	}
1068	<	public boolean implies(ProtectionDomain pd, Permission p) {
1069	<	return perms.implies(p);
1070	<	}
1071	<	public void refresh() {}
1062	>	public PermissionCollection getPermissions(CodeSource cs) {
1063	>	return perms;
1064	>	}
1065	>	public PermissionCollection getPermissions(ProtectionDomain pd) {
1066	>	return perms;
1067	>	}
1068	>	public boolean implies(ProtectionDomain pd, Permission p) {
1069	>	return perms.implies(p);
1070	>	}
1071	>	public void refresh() {}
1072	>	public String toString() {
1073	>	List<Permission> ps = new ArrayList<Permission>();
1074	>	for (Enumeration<Permission> e = perms.elements(); e.hasMoreElements();)
1075	>	ps.add(e.nextElement());
1076	>	return "AdjustablePolicy with permissions " + ps;
1077	>	}
1078		}
1079
1080	+	/**
1081	+	* Returns a policy containing all the permissions we ever need.
1082	+	*/
1083	+	public static Policy permissivePolicy() {
1084	+	return new AdjustablePolicy
1085	+	// Permissions j.u.c. needs directly
1086	+	(new RuntimePermission("modifyThread"),
1087	+	new RuntimePermission("getClassLoader"),
1088	+	new RuntimePermission("setContextClassLoader"),
1089	+	// Permissions needed to change permissions!
1090	+	new SecurityPermission("getPolicy"),
1091	+	new SecurityPermission("setPolicy"),
1092	+	new RuntimePermission("setSecurityManager"),
1093	+	// Permissions needed by the junit test harness
1094	+	new RuntimePermission("accessDeclaredMembers"),
1095	+	new PropertyPermission("*", "read"),
1096	+	new java.io.FilePermission("<<ALL FILES>>", "read"));
1097	+	}
1098
1099	<	// Some convenient Runnable classes
1099	>	/**
1100	>	* Sleeps until the given time has elapsed.
1101	>	* Throws AssertionFailedError if interrupted.
1102	>	*/
1103	>	void sleep(long millis) {
1104	>	try {
1105	>	delay(millis);
1106	>	} catch (InterruptedException fail) {
1107	>	AssertionFailedError afe =
1108	>	new AssertionFailedError("Unexpected InterruptedException");
1109	>	afe.initCause(fail);
1110	>	throw afe;
1111	>	}
1112	>	}
1113
1114	<	static class NoOpRunnable implements Runnable {
1115	<	public void run() {}
1114	>	/**
1115	>	* Spin-waits up to the specified number of milliseconds for the given
1116	>	* thread to enter a wait state: BLOCKED, WAITING, or TIMED_WAITING.
1117	>	*/
1118	>	void waitForThreadToEnterWaitState(Thread thread, long timeoutMillis) {
1119	>	long startTime = System.nanoTime();
1120	>	for (;;) {
1121	>	Thread.State s = thread.getState();
1122	>	if (s == Thread.State.BLOCKED ||
1123	>	s == Thread.State.WAITING ||
1124	>	s == Thread.State.TIMED_WAITING)
1125	>	return;
1126	>	else if (s == Thread.State.TERMINATED)
1127	>	fail("Unexpected thread termination");
1128	>	else if (millisElapsedSince(startTime) > timeoutMillis) {
1129	>	threadAssertTrue(thread.isAlive());
1130	>	return;
1131	>	}
1132	>	Thread.yield();
1133	>	}
1134		}
1135
1136	<	static class NoOpCallable implements Callable {
1137	<	public Object call() { return Boolean.TRUE; }
1136	>	/**
1137	>	* Waits up to LONG_DELAY_MS for the given thread to enter a wait
1138	>	* state: BLOCKED, WAITING, or TIMED_WAITING.
1139	>	*/
1140	>	void waitForThreadToEnterWaitState(Thread thread) {
1141	>	waitForThreadToEnterWaitState(thread, LONG_DELAY_MS);
1142	>	}
1143	>
1144	>	/**
1145	>	* Returns the number of milliseconds since time given by
1146	>	* startNanoTime, which must have been previously returned from a
1147	>	* call to {@link System#nanoTime()}.
1148	>	*/
1149	>	static long millisElapsedSince(long startNanoTime) {
1150	>	return NANOSECONDS.toMillis(System.nanoTime() - startNanoTime);
1151		}
1152
1153	<	static final String TEST_STRING = "a test string";
1153	>	//     void assertTerminatesPromptly(long timeoutMillis, Runnable r) {
1154	>	//         long startTime = System.nanoTime();
1155	>	//         try {
1156	>	//             r.run();
1157	>	//         } catch (Throwable fail) { threadUnexpectedException(fail); }
1158	>	//         if (millisElapsedSince(startTime) > timeoutMillis/2)
1159	>	//             throw new AssertionFailedError("did not return promptly");
1160	>	//     }
1161	>
1162	>	//     void assertTerminatesPromptly(Runnable r) {
1163	>	//         assertTerminatesPromptly(LONG_DELAY_MS/2, r);
1164	>	//     }
1165
1166	<	static class StringTask implements Callable<String> {
1167	<	public String call() { return TEST_STRING; }
1166	>	/**
1167	>	* Checks that timed f.get() returns the expected value, and does not
1168	>	* wait for the timeout to elapse before returning.
1169	>	*/
1170	>	<T> void checkTimedGet(Future<T> f, T expectedValue, long timeoutMillis) {
1171	>	long startTime = System.nanoTime();
1172	>	try {
1173	>	assertEquals(expectedValue, f.get(timeoutMillis, MILLISECONDS));
1174	>	} catch (Throwable fail) { threadUnexpectedException(fail); }
1175	>	if (millisElapsedSince(startTime) > timeoutMillis/2)
1176	>	throw new AssertionFailedError("timed get did not return promptly");
1177		}
1178
1179	<	static class NPETask implements Callable<String> {
1180	<	public String call() { throw new NullPointerException(); }
1179	>	<T> void checkTimedGet(Future<T> f, T expectedValue) {
1180	>	checkTimedGet(f, expectedValue, LONG_DELAY_MS);
1181		}
1182
1183	<	static class CallableOne implements Callable<Integer> {
1184	<	public Integer call() { return one; }
1183	>	/**
1184	>	* Returns a new started daemon Thread running the given runnable.
1185	>	*/
1186	>	Thread newStartedThread(Runnable runnable) {
1187	>	Thread t = new Thread(runnable);
1188	>	t.setDaemon(true);
1189	>	t.start();
1190	>	return t;
1191		}
1192
1193	<	class ShortRunnable implements Runnable {
1194	<	public void run() {
1195	<	try {
1196	<	Thread.sleep(SHORT_DELAY_MS);
1197	<	}
1198	<	catch(Exception e) {
1199	<	threadUnexpectedException();
1193	>	/**
1194	>	* Waits for the specified time (in milliseconds) for the thread
1195	>	* to terminate (using {@link Thread#join(long)}), else interrupts
1196	>	* the thread (in the hope that it may terminate later) and fails.
1197	>	*/
1198	>	void awaitTermination(Thread t, long timeoutMillis) {
1199	>	try {
1200	>	t.join(timeoutMillis);
1201	>	} catch (InterruptedException fail) {
1202	>	threadUnexpectedException(fail);
1203	>	} finally {
1204	>	if (t.getState() != Thread.State.TERMINATED) {
1205	>	t.interrupt();
1206	>	threadFail("Test timed out");
1207		}
1208		}
1209		}
1210
1211	<	class ShortInterruptedRunnable implements Runnable {
1212	<	public void run() {
1211	>	/**
1212	>	* Waits for LONG_DELAY_MS milliseconds for the thread to
1213	>	* terminate (using {@link Thread#join(long)}), else interrupts
1214	>	* the thread (in the hope that it may terminate later) and fails.
1215	>	*/
1216	>	void awaitTermination(Thread t) {
1217	>	awaitTermination(t, LONG_DELAY_MS);
1218	>	}
1219	>
1220	>	// Some convenient Runnable classes
1221	>
1222	>	public abstract class CheckedRunnable implements Runnable {
1223	>	protected abstract void realRun() throws Throwable;
1224	>
1225	>	public final void run() {
1226		try {
1227	<	Thread.sleep(SHORT_DELAY_MS);
1228	<	threadShouldThrow();
1229	<	}
387	<	catch(InterruptedException success) {
1227	>	realRun();
1228	>	} catch (Throwable fail) {
1229	>	threadUnexpectedException(fail);
1230		}
1231		}
1232		}
1233
1234	<	class SmallRunnable implements Runnable {
1235	<	public void run() {
1234	>	public abstract class RunnableShouldThrow implements Runnable {
1235	>	protected abstract void realRun() throws Throwable;
1236	>
1237	>	final Class<?> exceptionClass;
1238	>
1239	>	<T extends Throwable> RunnableShouldThrow(Class<T> exceptionClass) {
1240	>	this.exceptionClass = exceptionClass;
1241	>	}
1242	>
1243	>	public final void run() {
1244		try {
1245	<	Thread.sleep(SMALL_DELAY_MS);
1246	<	}
1247	<	catch(Exception e) {
1248	<	threadUnexpectedException();
1245	>	realRun();
1246	>	threadShouldThrow(exceptionClass.getSimpleName());
1247	>	} catch (Throwable t) {
1248	>	if (! exceptionClass.isInstance(t))
1249	>	threadUnexpectedException(t);
1250		}
1251		}
1252		}
1253
1254	<	class SmallPossiblyInterruptedRunnable implements Runnable {
1255	<	public void run() {
1254	>	public abstract class ThreadShouldThrow extends Thread {
1255	>	protected abstract void realRun() throws Throwable;
1256	>
1257	>	final Class<?> exceptionClass;
1258	>
1259	>	<T extends Throwable> ThreadShouldThrow(Class<T> exceptionClass) {
1260	>	this.exceptionClass = exceptionClass;
1261	>	}
1262	>
1263	>	public final void run() {
1264		try {
1265	<	Thread.sleep(SMALL_DELAY_MS);
1266	<	}
1267	<	catch(Exception e) {
1265	>	realRun();
1266	>	threadShouldThrow(exceptionClass.getSimpleName());
1267	>	} catch (Throwable t) {
1268	>	if (! exceptionClass.isInstance(t))
1269	>	threadUnexpectedException(t);
1270		}
1271		}
1272		}
1273
1274	<	class SmallCallable implements Callable {
1275	<	public Object call() {
1274	>	public abstract class CheckedInterruptedRunnable implements Runnable {
1275	>	protected abstract void realRun() throws Throwable;
1276	>
1277	>	public final void run() {
1278		try {
1279	<	Thread.sleep(SMALL_DELAY_MS);
1280	<	}
1281	<	catch(Exception e) {
1282	<	threadUnexpectedException();
1279	>	realRun();
1280	>	threadShouldThrow("InterruptedException");
1281	>	} catch (InterruptedException success) {
1282	>	threadAssertFalse(Thread.interrupted());
1283	>	} catch (Throwable fail) {
1284	>	threadUnexpectedException(fail);
1285		}
421	–	return Boolean.TRUE;
1286		}
1287		}
1288
1289	<	class SmallInterruptedRunnable implements Runnable {
1290	<	public void run() {
1289	>	public abstract class CheckedCallable<T> implements Callable<T> {
1290	>	protected abstract T realCall() throws Throwable;
1291	>
1292	>	public final T call() {
1293		try {
1294	<	Thread.sleep(SMALL_DELAY_MS);
1295	<	threadShouldThrow();
1296	<	}
1297	<	catch(InterruptedException success) {
1294	>	return realCall();
1295	>	} catch (Throwable fail) {
1296	>	threadUnexpectedException(fail);
1297	>	return null;
1298		}
1299		}
1300		}
1301
1302	+	public abstract class CheckedInterruptedCallable<T>
1303	+	implements Callable<T> {
1304	+	protected abstract T realCall() throws Throwable;
1305
1306	<	class MediumRunnable implements Runnable {
438	<	public void run() {
1306	>	public final T call() {
1307		try {
1308	<	Thread.sleep(MEDIUM_DELAY_MS);
1309	<	}
1310	<	catch(Exception e) {
1311	<	threadUnexpectedException();
1308	>	T result = realCall();
1309	>	threadShouldThrow("InterruptedException");
1310	>	return result;
1311	>	} catch (InterruptedException success) {
1312	>	threadAssertFalse(Thread.interrupted());
1313	>	} catch (Throwable fail) {
1314	>	threadUnexpectedException(fail);
1315		}
1316	+	return null;
1317		}
1318		}
1319
1320	<	class MediumInterruptedRunnable implements Runnable {
1321	<	public void run() {
1320	>	public static class NoOpRunnable implements Runnable {
1321	>	public void run() {}
1322	>	}
1323	>
1324	>	public static class NoOpCallable implements Callable {
1325	>	public Object call() { return Boolean.TRUE; }
1326	>	}
1327	>
1328	>	public static final String TEST_STRING = "a test string";
1329	>
1330	>	public static class StringTask implements Callable<String> {
1331	>	final String value;
1332	>	public StringTask() { this(TEST_STRING); }
1333	>	public StringTask(String value) { this.value = value; }
1334	>	public String call() { return value; }
1335	>	}
1336	>
1337	>	public Callable<String> latchAwaitingStringTask(final CountDownLatch latch) {
1338	>	return new CheckedCallable<String>() {
1339	>	protected String realCall() {
1340	>	try {
1341	>	latch.await();
1342	>	} catch (InterruptedException quittingTime) {}
1343	>	return TEST_STRING;
1344	>	}};
1345	>	}
1346	>
1347	>	public Runnable countDowner(final CountDownLatch latch) {
1348	>	return new CheckedRunnable() {
1349	>	public void realRun() throws InterruptedException {
1350	>	latch.countDown();
1351	>	}};
1352	>	}
1353	>
1354	>	class LatchAwaiter extends CheckedRunnable {
1355	>	static final int NEW = 0;
1356	>	static final int RUNNING = 1;
1357	>	static final int DONE = 2;
1358	>	final CountDownLatch latch;
1359	>	int state = NEW;
1360	>	LatchAwaiter(CountDownLatch latch) { this.latch = latch; }
1361	>	public void realRun() throws InterruptedException {
1362	>	state = 1;
1363	>	await(latch);
1364	>	state = 2;
1365	>	}
1366	>	}
1367	>
1368	>	public LatchAwaiter awaiter(CountDownLatch latch) {
1369	>	return new LatchAwaiter(latch);
1370	>	}
1371	>
1372	>	public void await(CountDownLatch latch) {
1373	>	try {
1374	>	assertTrue(latch.await(LONG_DELAY_MS, MILLISECONDS));
1375	>	} catch (Throwable fail) {
1376	>	threadUnexpectedException(fail);
1377	>	}
1378	>	}
1379	>
1380	>	public void await(Semaphore semaphore) {
1381	>	try {
1382	>	assertTrue(semaphore.tryAcquire(LONG_DELAY_MS, MILLISECONDS));
1383	>	} catch (Throwable fail) {
1384	>	threadUnexpectedException(fail);
1385	>	}
1386	>	}
1387	>
1388	>	//     /**
1389	>	//      * Spin-waits up to LONG_DELAY_MS until flag becomes true.
1390	>	//      */
1391	>	//     public void await(AtomicBoolean flag) {
1392	>	//         await(flag, LONG_DELAY_MS);
1393	>	//     }
1394	>
1395	>	//     /**
1396	>	//      * Spin-waits up to the specified timeout until flag becomes true.
1397	>	//      */
1398	>	//     public void await(AtomicBoolean flag, long timeoutMillis) {
1399	>	//         long startTime = System.nanoTime();
1400	>	//         while (!flag.get()) {
1401	>	//             if (millisElapsedSince(startTime) > timeoutMillis)
1402	>	//                 throw new AssertionFailedError("timed out");
1403	>	//             Thread.yield();
1404	>	//         }
1405	>	//     }
1406	>
1407	>	public static class NPETask implements Callable<String> {
1408	>	public String call() { throw new NullPointerException(); }
1409	>	}
1410	>
1411	>	public static class CallableOne implements Callable<Integer> {
1412	>	public Integer call() { return one; }
1413	>	}
1414	>
1415	>	public class ShortRunnable extends CheckedRunnable {
1416	>	protected void realRun() throws Throwable {
1417	>	delay(SHORT_DELAY_MS);
1418	>	}
1419	>	}
1420	>
1421	>	public class ShortInterruptedRunnable extends CheckedInterruptedRunnable {
1422	>	protected void realRun() throws InterruptedException {
1423	>	delay(SHORT_DELAY_MS);
1424	>	}
1425	>	}
1426	>
1427	>	public class SmallRunnable extends CheckedRunnable {
1428	>	protected void realRun() throws Throwable {
1429	>	delay(SMALL_DELAY_MS);
1430	>	}
1431	>	}
1432	>
1433	>	public class SmallPossiblyInterruptedRunnable extends CheckedRunnable {
1434	>	protected void realRun() {
1435		try {
1436	<	Thread.sleep(MEDIUM_DELAY_MS);
1437	<	threadShouldThrow();
453	<	}
454	<	catch(InterruptedException success) {
455	<	}
1436	>	delay(SMALL_DELAY_MS);
1437	>	} catch (InterruptedException ok) {}
1438		}
1439		}
1440
1441	<	class MediumPossiblyInterruptedRunnable implements Runnable {
1442	<	public void run() {
1441	>	public class SmallCallable extends CheckedCallable {
1442	>	protected Object realCall() throws InterruptedException {
1443	>	delay(SMALL_DELAY_MS);
1444	>	return Boolean.TRUE;
1445	>	}
1446	>	}
1447	>
1448	>	public class MediumRunnable extends CheckedRunnable {
1449	>	protected void realRun() throws Throwable {
1450	>	delay(MEDIUM_DELAY_MS);
1451	>	}
1452	>	}
1453	>
1454	>	public class MediumInterruptedRunnable extends CheckedInterruptedRunnable {
1455	>	protected void realRun() throws InterruptedException {
1456	>	delay(MEDIUM_DELAY_MS);
1457	>	}
1458	>	}
1459	>
1460	>	public Runnable possiblyInterruptedRunnable(final long timeoutMillis) {
1461	>	return new CheckedRunnable() {
1462	>	protected void realRun() {
1463	>	try {
1464	>	delay(timeoutMillis);
1465	>	} catch (InterruptedException ok) {}
1466	>	}};
1467	>	}
1468	>
1469	>	public class MediumPossiblyInterruptedRunnable extends CheckedRunnable {
1470	>	protected void realRun() {
1471		try {
1472	<	Thread.sleep(MEDIUM_DELAY_MS);
1473	<	}
1474	<	catch(InterruptedException success) {
1475	<	}
1472	>	delay(MEDIUM_DELAY_MS);
1473	>	} catch (InterruptedException ok) {}
1474	>	}
1475	>	}
1476	>
1477	>	public class LongPossiblyInterruptedRunnable extends CheckedRunnable {
1478	>	protected void realRun() {
1479	>	try {
1480	>	delay(LONG_DELAY_MS);
1481	>	} catch (InterruptedException ok) {}
1482		}
1483		}
1484
1485		/**
1486		* For use as ThreadFactory in constructors
1487		*/
1488	<	static class SimpleThreadFactory implements ThreadFactory{
1489	<	public Thread newThread(Runnable r){
1488	>	public static class SimpleThreadFactory implements ThreadFactory {
1489	>	public Thread newThread(Runnable r) {
1490		return new Thread(r);
1491	<	}
1491	>	}
1492	>	}
1493	>
1494	>	public interface TrackedRunnable extends Runnable {
1495	>	boolean isDone();
1496		}
1497
1498	<	static class TrackedShortRunnable implements Runnable {
1499	<	volatile boolean done = false;
1498	>	public static TrackedRunnable trackedRunnable(final long timeoutMillis) {
1499	>	return new TrackedRunnable() {
1500	>	private volatile boolean done = false;
1501	>	public boolean isDone() { return done; }
1502	>	public void run() {
1503	>	try {
1504	>	delay(timeoutMillis);
1505	>	done = true;
1506	>	} catch (InterruptedException ok) {}
1507	>	}
1508	>	};
1509	>	}
1510	>
1511	>	public static class TrackedShortRunnable implements Runnable {
1512	>	public volatile boolean done = false;
1513		public void run() {
1514		try {
1515	<	Thread.sleep(SMALL_DELAY_MS);
1515	>	delay(SHORT_DELAY_MS);
1516		done = true;
1517	<	} catch(Exception e){
485	<	}
1517	>	} catch (InterruptedException ok) {}
1518		}
1519		}
1520
1521	<	static class TrackedMediumRunnable implements Runnable {
1522	<	volatile boolean done = false;
1521	>	public static class TrackedSmallRunnable implements Runnable {
1522	>	public volatile boolean done = false;
1523		public void run() {
1524		try {
1525	<	Thread.sleep(MEDIUM_DELAY_MS);
1525	>	delay(SMALL_DELAY_MS);
1526		done = true;
1527	<	} catch(Exception e){
496	<	}
1527	>	} catch (InterruptedException ok) {}
1528		}
1529		}
1530
1531	<	static class TrackedLongRunnable implements Runnable {
1532	<	volatile boolean done = false;
1531	>	public static class TrackedMediumRunnable implements Runnable {
1532	>	public volatile boolean done = false;
1533		public void run() {
1534		try {
1535	<	Thread.sleep(LONG_DELAY_MS);
1535	>	delay(MEDIUM_DELAY_MS);
1536		done = true;
1537	<	} catch(Exception e){
1538	<	}
1537	>	} catch (InterruptedException ok) {}
1538	>	}
1539	>	}
1540	>
1541	>	public static class TrackedLongRunnable implements Runnable {
1542	>	public volatile boolean done = false;
1543	>	public void run() {
1544	>	try {
1545	>	delay(LONG_DELAY_MS);
1546	>	done = true;
1547	>	} catch (InterruptedException ok) {}
1548		}
1549		}
1550
1551	<	static class TrackedNoOpRunnable implements Runnable {
1552	<	volatile boolean done = false;
1551	>	public static class TrackedNoOpRunnable implements Runnable {
1552	>	public volatile boolean done = false;
1553		public void run() {
1554		done = true;
1555		}
1556		}
1557
1558	<	static class TrackedCallable implements Callable {
1559	<	volatile boolean done = false;
1558	>	public static class TrackedCallable implements Callable {
1559	>	public volatile boolean done = false;
1560		public Object call() {
1561		try {
1562	<	Thread.sleep(SMALL_DELAY_MS);
1562	>	delay(SMALL_DELAY_MS);
1563		done = true;
1564	<	} catch(Exception e){
525	<	}
1564	>	} catch (InterruptedException ok) {}
1565		return Boolean.TRUE;
1566		}
1567		}
1568
1569		/**
1570	+	* Analog of CheckedRunnable for RecursiveAction
1571	+	*/
1572	+	public abstract class CheckedRecursiveAction extends RecursiveAction {
1573	+	protected abstract void realCompute() throws Throwable;
1574	+
1575	+	@Override protected final void compute() {
1576	+	try {
1577	+	realCompute();
1578	+	} catch (Throwable fail) {
1579	+	threadUnexpectedException(fail);
1580	+	}
1581	+	}
1582	+	}
1583	+
1584	+	/**
1585	+	* Analog of CheckedCallable for RecursiveTask
1586	+	*/
1587	+	public abstract class CheckedRecursiveTask<T> extends RecursiveTask<T> {
1588	+	protected abstract T realCompute() throws Throwable;
1589	+
1590	+	@Override protected final T compute() {
1591	+	try {
1592	+	return realCompute();
1593	+	} catch (Throwable fail) {
1594	+	threadUnexpectedException(fail);
1595	+	return null;
1596	+	}
1597	+	}
1598	+	}
1599	+
1600	+	/**
1601		* For use as RejectedExecutionHandler in constructors
1602		*/
1603	<	static class NoOpREHandler implements RejectedExecutionHandler{
1604	<	public void rejectedExecution(Runnable r, ThreadPoolExecutor executor){}
1603	>	public static class NoOpREHandler implements RejectedExecutionHandler {
1604	>	public void rejectedExecution(Runnable r,
1605	>	ThreadPoolExecutor executor) {}
1606	>	}
1607	>
1608	>	/**
1609	>	* A CyclicBarrier that uses timed await and fails with
1610	>	* AssertionFailedErrors instead of throwing checked exceptions.
1611	>	*/
1612	>	public class CheckedBarrier extends CyclicBarrier {
1613	>	public CheckedBarrier(int parties) { super(parties); }
1614	>
1615	>	public int await() {
1616	>	try {
1617	>	return super.await(2 * LONG_DELAY_MS, MILLISECONDS);
1618	>	} catch (TimeoutException timedOut) {
1619	>	throw new AssertionFailedError("timed out");
1620	>	} catch (Exception fail) {
1621	>	AssertionFailedError afe =
1622	>	new AssertionFailedError("Unexpected exception: " + fail);
1623	>	afe.initCause(fail);
1624	>	throw afe;
1625	>	}
1626	>	}
1627	>	}
1628	>
1629	>	void checkEmpty(BlockingQueue q) {
1630	>	try {
1631	>	assertTrue(q.isEmpty());
1632	>	assertEquals(0, q.size());
1633	>	assertNull(q.peek());
1634	>	assertNull(q.poll());
1635	>	assertNull(q.poll(0, MILLISECONDS));
1636	>	assertEquals(q.toString(), "[]");
1637	>	assertTrue(Arrays.equals(q.toArray(), new Object[0]));
1638	>	assertFalse(q.iterator().hasNext());
1639	>	try {
1640	>	q.element();
1641	>	shouldThrow();
1642	>	} catch (NoSuchElementException success) {}
1643	>	try {
1644	>	q.iterator().next();
1645	>	shouldThrow();
1646	>	} catch (NoSuchElementException success) {}
1647	>	try {
1648	>	q.remove();
1649	>	shouldThrow();
1650	>	} catch (NoSuchElementException success) {}
1651	>	} catch (InterruptedException fail) { threadUnexpectedException(fail); }
1652	>	}
1653	>
1654	>	void assertSerialEquals(Object x, Object y) {
1655	>	assertTrue(Arrays.equals(serialBytes(x), serialBytes(y)));
1656	>	}
1657	>
1658	>	void assertNotSerialEquals(Object x, Object y) {
1659	>	assertFalse(Arrays.equals(serialBytes(x), serialBytes(y)));
1660	>	}
1661	>
1662	>	byte[] serialBytes(Object o) {
1663	>	try {
1664	>	ByteArrayOutputStream bos = new ByteArrayOutputStream();
1665	>	ObjectOutputStream oos = new ObjectOutputStream(bos);
1666	>	oos.writeObject(o);
1667	>	oos.flush();
1668	>	oos.close();
1669	>	return bos.toByteArray();
1670	>	} catch (Throwable fail) {
1671	>	threadUnexpectedException(fail);
1672	>	return new byte[0];
1673	>	}
1674	>	}
1675	>
1676	>	@SuppressWarnings("unchecked")
1677	>	<T> T serialClone(T o) {
1678	>	try {
1679	>	ObjectInputStream ois = new ObjectInputStream
1680	>	(new ByteArrayInputStream(serialBytes(o)));
1681	>	T clone = (T) ois.readObject();
1682	>	assertSame(o.getClass(), clone.getClass());
1683	>	return clone;
1684	>	} catch (Throwable fail) {
1685	>	threadUnexpectedException(fail);
1686	>	return null;
1687	>	}
1688	>	}
1689	>
1690	>	public void assertThrows(Class<? extends Throwable> expectedExceptionClass,
1691	>	Runnable... throwingActions) {
1692	>	for (Runnable throwingAction : throwingActions) {
1693	>	boolean threw = false;
1694	>	try { throwingAction.run(); }
1695	>	catch (Throwable t) {
1696	>	threw = true;
1697	>	if (!expectedExceptionClass.isInstance(t)) {
1698	>	AssertionFailedError afe =
1699	>	new AssertionFailedError
1700	>	("Expected " + expectedExceptionClass.getName() +
1701	>	", got " + t.getClass().getName());
1702	>	afe.initCause(t);
1703	>	threadUnexpectedException(afe);
1704	>	}
1705	>	}
1706	>	if (!threw)
1707	>	shouldThrow(expectedExceptionClass.getName());
1708	>	}
1709	>	}
1710	>
1711	>	public void assertIteratorExhausted(Iterator<?> it) {
1712	>	try {
1713	>	it.next();
1714	>	shouldThrow();
1715	>	} catch (NoSuchElementException success) {}
1716	>	assertFalse(it.hasNext());
1717		}
536	–
537	–
1718		}

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