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Comparing jsr166/src/test/tck/JSR166TestCase.java (file contents):
Revision 1.5 by dl, Fri Sep 26 15:33:13 2003 UTC vs.
Revision 1.191 by jsr166, Sat May 21 22:29:45 2016 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.*;
9	>	/*
10	>	* @test
11	>	* @summary JSR-166 tck tests
12	>	* @modules java.management
13	>	* @build *
14	>	* @run junit/othervm/timeout=1000 -Djsr166.testImplementationDetails=true JSR166TestCase
15	>	*/
16
17	+	import static java.util.concurrent.TimeUnit.MILLISECONDS;
18	+	import static java.util.concurrent.TimeUnit.MINUTES;
19	+	import static java.util.concurrent.TimeUnit.NANOSECONDS;
20	+
21	+	import java.io.ByteArrayInputStream;
22	+	import java.io.ByteArrayOutputStream;
23	+	import java.io.ObjectInputStream;
24	+	import java.io.ObjectOutputStream;
25	+	import java.lang.management.ManagementFactory;
26	+	import java.lang.management.ThreadInfo;
27	+	import java.lang.management.ThreadMXBean;
28	+	import java.lang.reflect.Constructor;
29	+	import java.lang.reflect.Method;
30	+	import java.lang.reflect.Modifier;
31	+	import java.nio.file.Files;
32	+	import java.nio.file.Paths;
33	+	import java.security.CodeSource;
34	+	import java.security.Permission;
35	+	import java.security.PermissionCollection;
36	+	import java.security.Permissions;
37	+	import java.security.Policy;
38	+	import java.security.ProtectionDomain;
39	+	import java.security.SecurityPermission;
40	+	import java.util.ArrayList;
41	+	import java.util.Arrays;
42	+	import java.util.Date;
43	+	import java.util.Enumeration;
44	+	import java.util.Iterator;
45	+	import java.util.List;
46	+	import java.util.NoSuchElementException;
47	+	import java.util.PropertyPermission;
48	+	import java.util.concurrent.BlockingQueue;
49	+	import java.util.concurrent.Callable;
50	+	import java.util.concurrent.CountDownLatch;
51	+	import java.util.concurrent.CyclicBarrier;
52	+	import java.util.concurrent.ExecutionException;
53	+	import java.util.concurrent.Executors;
54	+	import java.util.concurrent.ExecutorService;
55	+	import java.util.concurrent.ForkJoinPool;
56	+	import java.util.concurrent.Future;
57	+	import java.util.concurrent.RecursiveAction;
58	+	import java.util.concurrent.RecursiveTask;
59	+	import java.util.concurrent.RejectedExecutionHandler;
60	+	import java.util.concurrent.Semaphore;
61	+	import java.util.concurrent.ThreadFactory;
62	+	import java.util.concurrent.ThreadPoolExecutor;
63	+	import java.util.concurrent.TimeoutException;
64	+	import java.util.concurrent.atomic.AtomicBoolean;
65	+	import java.util.concurrent.atomic.AtomicReference;
66	+	import java.util.regex.Matcher;
67	+	import java.util.regex.Pattern;
68	+
69	+	import junit.framework.AssertionFailedError;
70	+	import junit.framework.Test;
71	+	import junit.framework.TestCase;
72	+	import junit.framework.TestResult;
73	+	import junit.framework.TestSuite;
74
75		/**
76		* Base class for JSR166 Junit TCK tests.  Defines some constants,
77		* utility methods and classes, as well as a simple framework for
78		* helping to make sure that assertions failing in generated threads
79		* cause the associated test that generated them to itself fail (which
80	<	* JUnit doe not otherwise arrange).  The rules for creating such
80	>	* JUnit does not otherwise arrange).  The rules for creating such
81		* tests are:
82		*
83		* <ol>
84		*
85	<	* <li> All assertions in code running in generated threads must use
86	<	* the forms {@link threadFail} , {@link threadAssertTrue} {@link
87	<	* threadAssertEquals}, or {@link threadAssertNull}, (not
88	<	* <tt>fail</tt>, <tt>assertTrue</tt>, etc.) It is OK (but not
85	>	* <li>All assertions in code running in generated threads must use
86	>	* the forms {@link #threadFail}, {@link #threadAssertTrue}, {@link
87	>	* #threadAssertEquals}, or {@link #threadAssertNull}, (not
88	>	* {@code fail}, {@code assertTrue}, etc.) It is OK (but not
89		* particularly recommended) for other code to use these forms too.
90		* Only the most typically used JUnit assertion methods are defined
91	<	* this way, but enough to live with.</li>
91	>	* this way, but enough to live with.
92		*
93	<	* <li> If you override {@link setUp} or {@link tearDown}, make sure
94	<	* to invoke <tt>super.setUp</tt> and <tt>super.tearDown</tt> within
93	>	* <li>If you override {@link #setUp} or {@link #tearDown}, make sure
94	>	* to invoke {@code super.setUp} and {@code super.tearDown} within
95		* them. These methods are used to clear and check for thread
96	<	* assertion failures.</li>
96	>	* assertion failures.
97		*
98	<	* <li>All delays and timeouts must use one of the constants {@link
99	<	* SHORT_DELAY_MS}, {@link SMALL_DELAY_MS}, {@link MEDIUM_DELAY_MS},
100	<	* {@link LONG_DELAY_MS}. The idea here is that a SHORT is always
98	>	* <li>All delays and timeouts must use one of the constants {@code
99	>	* SHORT_DELAY_MS}, {@code SMALL_DELAY_MS}, {@code MEDIUM_DELAY_MS},
100	>	* {@code LONG_DELAY_MS}. The idea here is that a SHORT is always
101		* discriminable from zero time, and always allows enough time for the
102		* small amounts of computation (creating a thread, calling a few
103		* methods, etc) needed to reach a timeout point. Similarly, a SMALL
104		* is always discriminable as larger than SHORT and smaller than
105		* MEDIUM.  And so on. These constants are set to conservative values,
106		* but even so, if there is ever any doubt, they can all be increased
107	<	* in one spot to rerun tests on slower platforms</li>
107	>	* in one spot to rerun tests on slower platforms.
108		*
109	<	* <li> All threads generated must be joined inside each test case
110	<	* method (or <tt>fail</tt> to do so) before returning from the
111	<	* method. The {@link joinPool} method can be used to do this when
112	<	* using Executors.</li>
109	>	* <li>All threads generated must be joined inside each test case
110	>	* method (or {@code fail} to do so) before returning from the
111	>	* method. The {@code joinPool} method can be used to do this when
112	>	* using Executors.
113		*
114		* </ol>
115	+	*
116	+	* <p><b>Other notes</b>
117	+	* <ul>
118	+	*
119	+	* <li>Usually, there is one testcase method per JSR166 method
120	+	* covering "normal" operation, and then as many exception-testing
121	+	* methods as there are exceptions the method can throw. Sometimes
122	+	* there are multiple tests per JSR166 method when the different
123	+	* "normal" behaviors differ significantly. And sometimes testcases
124	+	* cover multiple methods when they cannot be tested in isolation.
125	+	*
126	+	* <li>The documentation style for testcases is to provide as javadoc
127	+	* a simple sentence or two describing the property that the testcase
128	+	* method purports to test. The javadocs do not say anything about how
129	+	* the property is tested. To find out, read the code.
130	+	*
131	+	* <li>These tests are "conformance tests", and do not attempt to
132	+	* test throughput, latency, scalability or other performance factors
133	+	* (see the separate "jtreg" tests for a set intended to check these
134	+	* for the most central aspects of functionality.) So, most tests use
135	+	* the smallest sensible numbers of threads, collection sizes, etc
136	+	* needed to check basic conformance.
137	+	*
138	+	* <li>The test classes currently do not declare inclusion in
139	+	* any particular package to simplify things for people integrating
140	+	* them in TCK test suites.
141	+	*
142	+	* <li>As a convenience, the {@code main} of this class (JSR166TestCase)
143	+	* runs all JSR166 unit tests.
144	+	*
145	+	* </ul>
146		*/
147		public class JSR166TestCase extends TestCase {
148	+	private static final boolean useSecurityManager =
149	+	Boolean.getBoolean("jsr166.useSecurityManager");
150	+
151	+	protected static final boolean expensiveTests =
152	+	Boolean.getBoolean("jsr166.expensiveTests");
153	+
154	+	/**
155	+	* If true, also run tests that are not part of the official tck
156	+	* because they test unspecified implementation details.
157	+	*/
158	+	protected static final boolean testImplementationDetails =
159	+	Boolean.getBoolean("jsr166.testImplementationDetails");
160	+
161	+	/**
162	+	* If true, report on stdout all "slow" tests, that is, ones that
163	+	* take more than profileThreshold milliseconds to execute.
164	+	*/
165	+	private static final boolean profileTests =
166	+	Boolean.getBoolean("jsr166.profileTests");
167	+
168	+	/**
169	+	* The number of milliseconds that tests are permitted for
170	+	* execution without being reported, when profileTests is set.
171	+	*/
172	+	private static final long profileThreshold =
173	+	Long.getLong("jsr166.profileThreshold", 100);
174	+
175	+	/**
176	+	* The number of repetitions per test (for tickling rare bugs).
177	+	*/
178	+	private static final int runsPerTest =
179	+	Integer.getInteger("jsr166.runsPerTest", 1);
180	+
181	+	/**
182	+	* The number of repetitions of the test suite (for finding leaks?).
183	+	*/
184	+	private static final int suiteRuns =
185	+	Integer.getInteger("jsr166.suiteRuns", 1);
186	+
187	+	/**
188	+	* Returns the value of the system property, or NaN if not defined.
189	+	*/
190	+	private static float systemPropertyValue(String name) {
191	+	String floatString = System.getProperty(name);
192	+	if (floatString == null)
193	+	return Float.NaN;
194	+	try {
195	+	return Float.parseFloat(floatString);
196	+	} catch (NumberFormatException ex) {
197	+	throw new IllegalArgumentException(
198	+	String.format("Bad float value in system property %s=%s",
199	+	name, floatString));
200	+	}
201	+	}
202	+
203	+	/**
204	+	* The scaling factor to apply to standard delays used in tests.
205	+	* May be initialized from any of:
206	+	* - the "jsr166.delay.factor" system property
207	+	* - the "test.timeout.factor" system property (as used by jtreg)
208	+	*   See: http://openjdk.java.net/jtreg/tag-spec.html
209	+	* - hard-coded fuzz factor when using a known slowpoke VM
210	+	*/
211	+	private static final float delayFactor = delayFactor();
212	+
213	+	private static float delayFactor() {
214	+	float x;
215	+	if (!Float.isNaN(x = systemPropertyValue("jsr166.delay.factor")))
216	+	return x;
217	+	if (!Float.isNaN(x = systemPropertyValue("test.timeout.factor")))
218	+	return x;
219	+	String prop = System.getProperty("java.vm.version");
220	+	if (prop != null && prop.matches(".*debug.*"))
221	+	return 4.0f; // How much slower is fastdebug than product?!
222	+	return 1.0f;
223	+	}
224	+
225	+	public JSR166TestCase() { super(); }
226	+	public JSR166TestCase(String name) { super(name); }
227	+
228	+	/**
229	+	* A filter for tests to run, matching strings of the form
230	+	* methodName(className), e.g. "testInvokeAll5(ForkJoinPoolTest)"
231	+	* Usefully combined with jsr166.runsPerTest.
232	+	*/
233	+	private static final Pattern methodFilter = methodFilter();
234	+
235	+	private static Pattern methodFilter() {
236	+	String regex = System.getProperty("jsr166.methodFilter");
237	+	return (regex == null) ? null : Pattern.compile(regex);
238	+	}
239	+
240	+	// Instrumentation to debug very rare, but very annoying hung test runs.
241	+	static volatile TestCase currentTestCase;
242	+	// static volatile int currentRun = 0;
243	+	static {
244	+	Runnable checkForWedgedTest = new Runnable() { public void run() {
245	+	// Avoid spurious reports with enormous runsPerTest.
246	+	// A single test case run should never take more than 1 second.
247	+	// But let's cap it at the high end too ...
248	+	final int timeoutMinutes =
249	+	Math.min(15, Math.max(runsPerTest / 60, 1));
250	+	for (TestCase lastTestCase = currentTestCase;;) {
251	+	try { MINUTES.sleep(timeoutMinutes); }
252	+	catch (InterruptedException unexpected) { break; }
253	+	if (lastTestCase == currentTestCase) {
254	+	System.err.printf(
255	+	"Looks like we're stuck running test: %s%n",
256	+	lastTestCase);
257	+	//                     System.err.printf(
258	+	//                         "Looks like we're stuck running test: %s (%d/%d)%n",
259	+	//                         lastTestCase, currentRun, runsPerTest);
260	+	//                     System.err.println("availableProcessors=" +
261	+	//                         Runtime.getRuntime().availableProcessors());
262	+	//                     System.err.printf("cpu model = %s%n", cpuModel());
263	+	dumpTestThreads();
264	+	// one stack dump is probably enough; more would be spam
265	+	break;
266	+	}
267	+	lastTestCase = currentTestCase;
268	+	}}};
269	+	Thread thread = new Thread(checkForWedgedTest, "checkForWedgedTest");
270	+	thread.setDaemon(true);
271	+	thread.start();
272	+	}
273	+
274	+	//     public static String cpuModel() {
275	+	//         try {
276	+	//             Matcher matcher = Pattern.compile("model name\\s*: (.*)")
277	+	//                 .matcher(new String(
278	+	//                      Files.readAllBytes(Paths.get("/proc/cpuinfo")), "UTF-8"));
279	+	//             matcher.find();
280	+	//             return matcher.group(1);
281	+	//         } catch (Exception ex) { return null; }
282	+	//     }
283	+
284	+	public void runBare() throws Throwable {
285	+	currentTestCase = this;
286	+	if (methodFilter == null
287	+	|| methodFilter.matcher(toString()).find())
288	+	super.runBare();
289	+	}
290	+
291	+	protected void runTest() throws Throwable {
292	+	for (int i = 0; i < runsPerTest; i++) {
293	+	// currentRun = i;
294	+	if (profileTests)
295	+	runTestProfiled();
296	+	else
297	+	super.runTest();
298	+	}
299	+	}
300	+
301	+	protected void runTestProfiled() throws Throwable {
302	+	for (int i = 0; i < 2; i++) {
303	+	long startTime = System.nanoTime();
304	+	super.runTest();
305	+	long elapsedMillis = millisElapsedSince(startTime);
306	+	if (elapsedMillis < profileThreshold)
307	+	break;
308	+	// Never report first run of any test; treat it as a
309	+	// warmup run, notably to trigger all needed classloading,
310	+	if (i > 0)
311	+	System.out.printf("%n%s: %d%n", toString(), elapsedMillis);
312	+	}
313	+	}
314	+
315	+	/**
316	+	* Runs all JSR166 unit tests using junit.textui.TestRunner.
317	+	*/
318	+	public static void main(String[] args) {
319	+	main(suite(), args);
320	+	}
321	+
322	+	static class PithyResultPrinter extends junit.textui.ResultPrinter {
323	+	PithyResultPrinter(java.io.PrintStream writer) { super(writer); }
324	+	long runTime;
325	+	public void startTest(Test test) {}
326	+	protected void printHeader(long runTime) {
327	+	this.runTime = runTime; // defer printing for later
328	+	}
329	+	protected void printFooter(TestResult result) {
330	+	if (result.wasSuccessful()) {
331	+	getWriter().println("OK (" + result.runCount() + " tests)"
332	+	+ "  Time: " + elapsedTimeAsString(runTime));
333	+	} else {
334	+	getWriter().println("Time: " + elapsedTimeAsString(runTime));
335	+	super.printFooter(result);
336	+	}
337	+	}
338	+	}
339	+
340	+	/**
341	+	* Returns a TestRunner that doesn't bother with unnecessary
342	+	* fluff, like printing a "." for each test case.
343	+	*/
344	+	static junit.textui.TestRunner newPithyTestRunner() {
345	+	junit.textui.TestRunner runner = new junit.textui.TestRunner();
346	+	runner.setPrinter(new PithyResultPrinter(System.out));
347	+	return runner;
348	+	}
349	+
350	+	/**
351	+	* Runs all unit tests in the given test suite.
352	+	* Actual behavior influenced by jsr166.* system properties.
353	+	*/
354	+	static void main(Test suite, String[] args) {
355	+	if (useSecurityManager) {
356	+	System.err.println("Setting a permissive security manager");
357	+	Policy.setPolicy(permissivePolicy());
358	+	System.setSecurityManager(new SecurityManager());
359	+	}
360	+	for (int i = 0; i < suiteRuns; i++) {
361	+	TestResult result = newPithyTestRunner().doRun(suite);
362	+	if (!result.wasSuccessful())
363	+	System.exit(1);
364	+	System.gc();
365	+	System.runFinalization();
366	+	}
367	+	}
368	+
369	+	public static TestSuite newTestSuite(Object... suiteOrClasses) {
370	+	TestSuite suite = new TestSuite();
371	+	for (Object suiteOrClass : suiteOrClasses) {
372	+	if (suiteOrClass instanceof TestSuite)
373	+	suite.addTest((TestSuite) suiteOrClass);
374	+	else if (suiteOrClass instanceof Class)
375	+	suite.addTest(new TestSuite((Class<?>) suiteOrClass));
376	+	else
377	+	throw new ClassCastException("not a test suite or class");
378	+	}
379	+	return suite;
380	+	}
381	+
382	+	public static void addNamedTestClasses(TestSuite suite,
383	+	String... testClassNames) {
384	+	for (String testClassName : testClassNames) {
385	+	try {
386	+	Class<?> testClass = Class.forName(testClassName);
387	+	Method m = testClass.getDeclaredMethod("suite",
388	+	new Class<?>[0]);
389	+	suite.addTest(newTestSuite((Test)m.invoke(null)));
390	+	} catch (Exception e) {
391	+	throw new Error("Missing test class", e);
392	+	}
393	+	}
394	+	}
395	+
396	+	public static final double JAVA_CLASS_VERSION;
397	+	public static final String JAVA_SPECIFICATION_VERSION;
398	+	static {
399	+	try {
400	+	JAVA_CLASS_VERSION = java.security.AccessController.doPrivileged(
401	+	new java.security.PrivilegedAction<Double>() {
402	+	public Double run() {
403	+	return Double.valueOf(System.getProperty("java.class.version"));}});
404	+	JAVA_SPECIFICATION_VERSION = java.security.AccessController.doPrivileged(
405	+	new java.security.PrivilegedAction<String>() {
406	+	public String run() {
407	+	return System.getProperty("java.specification.version");}});
408	+	} catch (Throwable t) {
409	+	throw new Error(t);
410	+	}
411	+	}
412	+
413	+	public static boolean atLeastJava6() { return JAVA_CLASS_VERSION >= 50.0; }
414	+	public static boolean atLeastJava7() { return JAVA_CLASS_VERSION >= 51.0; }
415	+	public static boolean atLeastJava8() { return JAVA_CLASS_VERSION >= 52.0; }
416	+	public static boolean atLeastJava9() {
417	+	return JAVA_CLASS_VERSION >= 53.0
418	+	// As of 2015-09, java9 still uses 52.0 class file version
419	+	|| JAVA_SPECIFICATION_VERSION.matches("^(1\\.)?(9|[0-9][0-9])$");
420	+	}
421	+	public static boolean atLeastJava10() {
422	+	return JAVA_CLASS_VERSION >= 54.0
423	+	|| JAVA_SPECIFICATION_VERSION.matches("^(1\\.)?[0-9][0-9]$");
424	+	}
425	+
426	+	/**
427	+	* Collects all JSR166 unit tests as one suite.
428	+	*/
429	+	public static Test suite() {
430	+	// Java7+ test classes
431	+	TestSuite suite = newTestSuite(
432	+	ForkJoinPoolTest.suite(),
433	+	ForkJoinTaskTest.suite(),
434	+	RecursiveActionTest.suite(),
435	+	RecursiveTaskTest.suite(),
436	+	LinkedTransferQueueTest.suite(),
437	+	PhaserTest.suite(),
438	+	ThreadLocalRandomTest.suite(),
439	+	AbstractExecutorServiceTest.suite(),
440	+	AbstractQueueTest.suite(),
441	+	AbstractQueuedSynchronizerTest.suite(),
442	+	AbstractQueuedLongSynchronizerTest.suite(),
443	+	ArrayBlockingQueueTest.suite(),
444	+	ArrayDequeTest.suite(),
445	+	AtomicBooleanTest.suite(),
446	+	AtomicIntegerArrayTest.suite(),
447	+	AtomicIntegerFieldUpdaterTest.suite(),
448	+	AtomicIntegerTest.suite(),
449	+	AtomicLongArrayTest.suite(),
450	+	AtomicLongFieldUpdaterTest.suite(),
451	+	AtomicLongTest.suite(),
452	+	AtomicMarkableReferenceTest.suite(),
453	+	AtomicReferenceArrayTest.suite(),
454	+	AtomicReferenceFieldUpdaterTest.suite(),
455	+	AtomicReferenceTest.suite(),
456	+	AtomicStampedReferenceTest.suite(),
457	+	ConcurrentHashMapTest.suite(),
458	+	ConcurrentLinkedDequeTest.suite(),
459	+	ConcurrentLinkedQueueTest.suite(),
460	+	ConcurrentSkipListMapTest.suite(),
461	+	ConcurrentSkipListSubMapTest.suite(),
462	+	ConcurrentSkipListSetTest.suite(),
463	+	ConcurrentSkipListSubSetTest.suite(),
464	+	CopyOnWriteArrayListTest.suite(),
465	+	CopyOnWriteArraySetTest.suite(),
466	+	CountDownLatchTest.suite(),
467	+	CyclicBarrierTest.suite(),
468	+	DelayQueueTest.suite(),
469	+	EntryTest.suite(),
470	+	ExchangerTest.suite(),
471	+	ExecutorsTest.suite(),
472	+	ExecutorCompletionServiceTest.suite(),
473	+	FutureTaskTest.suite(),
474	+	LinkedBlockingDequeTest.suite(),
475	+	LinkedBlockingQueueTest.suite(),
476	+	LinkedListTest.suite(),
477	+	LockSupportTest.suite(),
478	+	PriorityBlockingQueueTest.suite(),
479	+	PriorityQueueTest.suite(),
480	+	ReentrantLockTest.suite(),
481	+	ReentrantReadWriteLockTest.suite(),
482	+	ScheduledExecutorTest.suite(),
483	+	ScheduledExecutorSubclassTest.suite(),
484	+	SemaphoreTest.suite(),
485	+	SynchronousQueueTest.suite(),
486	+	SystemTest.suite(),
487	+	ThreadLocalTest.suite(),
488	+	ThreadPoolExecutorTest.suite(),
489	+	ThreadPoolExecutorSubclassTest.suite(),
490	+	ThreadTest.suite(),
491	+	TimeUnitTest.suite(),
492	+	TreeMapTest.suite(),
493	+	TreeSetTest.suite(),
494	+	TreeSubMapTest.suite(),
495	+	TreeSubSetTest.suite());
496	+
497	+	// Java8+ test classes
498	+	if (atLeastJava8()) {
499	+	String[] java8TestClassNames = {
500	+	"Atomic8Test",
501	+	"CompletableFutureTest",
502	+	"ConcurrentHashMap8Test",
503	+	"CountedCompleterTest",
504	+	"DoubleAccumulatorTest",
505	+	"DoubleAdderTest",
506	+	"ForkJoinPool8Test",
507	+	"ForkJoinTask8Test",
508	+	"LongAccumulatorTest",
509	+	"LongAdderTest",
510	+	"SplittableRandomTest",
511	+	"StampedLockTest",
512	+	"SubmissionPublisherTest",
513	+	"ThreadLocalRandom8Test",
514	+	"TimeUnit8Test",
515	+	};
516	+	addNamedTestClasses(suite, java8TestClassNames);
517	+	}
518	+
519	+	// Java9+ test classes
520	+	if (atLeastJava9()) {
521	+	String[] java9TestClassNames = {
522	+	// Currently empty, but expecting varhandle tests
523	+	};
524	+	addNamedTestClasses(suite, java9TestClassNames);
525	+	}
526	+
527	+	return suite;
528	+	}
529	+
530	+	/** Returns list of junit-style test method names in given class. */
531	+	public static ArrayList<String> testMethodNames(Class<?> testClass) {
532	+	Method[] methods = testClass.getDeclaredMethods();
533	+	ArrayList<String> names = new ArrayList<String>(methods.length);
534	+	for (Method method : methods) {
535	+	if (method.getName().startsWith("test")
536	+	&& Modifier.isPublic(method.getModifiers())
537	+	// method.getParameterCount() requires jdk8+
538	+	&& method.getParameterTypes().length == 0) {
539	+	names.add(method.getName());
540	+	}
541	+	}
542	+	return names;
543	+	}
544	+
545	+	/**
546	+	* Returns junit-style testSuite for the given test class, but
547	+	* parameterized by passing extra data to each test.
548	+	*/
549	+	public static <ExtraData> Test parameterizedTestSuite
550	+	(Class<? extends JSR166TestCase> testClass,
551	+	Class<ExtraData> dataClass,
552	+	ExtraData data) {
553	+	try {
554	+	TestSuite suite = new TestSuite();
555	+	Constructor c =
556	+	testClass.getDeclaredConstructor(dataClass, String.class);
557	+	for (String methodName : testMethodNames(testClass))
558	+	suite.addTest((Test) c.newInstance(data, methodName));
559	+	return suite;
560	+	} catch (Exception e) {
561	+	throw new Error(e);
562	+	}
563	+	}
564	+
565	+	/**
566	+	* Returns junit-style testSuite for the jdk8 extension of the
567	+	* given test class, but parameterized by passing extra data to
568	+	* each test.  Uses reflection to allow compilation in jdk7.
569	+	*/
570	+	public static <ExtraData> Test jdk8ParameterizedTestSuite
571	+	(Class<? extends JSR166TestCase> testClass,
572	+	Class<ExtraData> dataClass,
573	+	ExtraData data) {
574	+	if (atLeastJava8()) {
575	+	String name = testClass.getName();
576	+	String name8 = name.replaceAll("Test$", "8Test");
577	+	if (name.equals(name8)) throw new Error(name);
578	+	try {
579	+	return (Test)
580	+	Class.forName(name8)
581	+	.getMethod("testSuite", new Class[] { dataClass })
582	+	.invoke(null, data);
583	+	} catch (Exception e) {
584	+	throw new Error(e);
585	+	}
586	+	} else {
587	+	return new TestSuite();
588	+	}
589	+	}
590	+
591	+	// Delays for timing-dependent tests, in milliseconds.
592
593		public static long SHORT_DELAY_MS;
594		public static long SMALL_DELAY_MS;
595		public static long MEDIUM_DELAY_MS;
596		public static long LONG_DELAY_MS;
597
62	–
598		/**
599	<	* Return the shortest timed delay. This could
600	<	* be reimplmented to use for example a Property.
601	<	*/
599	>	* Returns the shortest timed delay. This can be scaled up for
600	>	* slow machines using the jsr166.delay.factor system property,
601	>	* or via jtreg's -timeoutFactor: flag.
602	>	* http://openjdk.java.net/jtreg/command-help.html
603	>	*/
604		protected long getShortDelay() {
605	<	return 100;
605	>	return (long) (50 * delayFactor);
606		}
607
71	–
608		/**
609	<	* Set delays as multiples of SHORT_DELAY.
609	>	* Sets delays as multiples of SHORT_DELAY.
610		*/
611	<	protected  void setDelays() {
611	>	protected void setDelays() {
612		SHORT_DELAY_MS = getShortDelay();
613	<	SMALL_DELAY_MS = SHORT_DELAY_MS * 5;
613	>	SMALL_DELAY_MS  = SHORT_DELAY_MS * 5;
614		MEDIUM_DELAY_MS = SHORT_DELAY_MS * 10;
615	<	LONG_DELAY_MS = SHORT_DELAY_MS * 50;
615	>	LONG_DELAY_MS   = SHORT_DELAY_MS * 200;
616	>	}
617	>
618	>	/**
619	>	* Returns a timeout in milliseconds to be used in tests that
620	>	* verify that operations block or time out.
621	>	*/
622	>	long timeoutMillis() {
623	>	return SHORT_DELAY_MS / 4;
624	>	}
625	>
626	>	/**
627	>	* Returns a new Date instance representing a time at least
628	>	* delayMillis milliseconds in the future.
629	>	*/
630	>	Date delayedDate(long delayMillis) {
631	>	// Add 1 because currentTimeMillis is known to round into the past.
632	>	return new Date(System.currentTimeMillis() + delayMillis + 1);
633		}
634
635		/**
636	<	* Flag set true if any threadAssert methods fail
636	>	* The first exception encountered if any threadAssertXXX method fails.
637		*/
638	<	volatile boolean threadFailed;
638	>	private final AtomicReference<Throwable> threadFailure
639	>	= new AtomicReference<Throwable>(null);
640
641		/**
642	<	* Initialize test to indicate that no thread assertions have failed
642	>	* Records an exception so that it can be rethrown later in the test
643	>	* harness thread, triggering a test case failure.  Only the first
644	>	* failure is recorded; subsequent calls to this method from within
645	>	* the same test have no effect.
646		*/
647	<	public void setUp() {
647	>	public void threadRecordFailure(Throwable t) {
648	>	System.err.println(t);
649	>	dumpTestThreads();
650	>	threadFailure.compareAndSet(null, t);
651	>	}
652	>
653	>	public void setUp() {
654		setDelays();
655	<	threadFailed = false;
655	>	}
656	>
657	>	void tearDownFail(String format, Object... args) {
658	>	String msg = toString() + ": " + String.format(format, args);
659	>	System.err.println(msg);
660	>	dumpTestThreads();
661	>	throw new AssertionFailedError(msg);
662		}
663
664		/**
665	<	* Trigger test case failure if any thread assertions have failed
665	>	* Extra checks that get done for all test cases.
666	>	*
667	>	* Triggers test case failure if any thread assertions have failed,
668	>	* by rethrowing, in the test harness thread, any exception recorded
669	>	* earlier by threadRecordFailure.
670	>	*
671	>	* Triggers test case failure if interrupt status is set in the main thread.
672		*/
673	<	public void tearDown() {
674	<	assertFalse(threadFailed);
673	>	public void tearDown() throws Exception {
674	>	Throwable t = threadFailure.getAndSet(null);
675	>	if (t != null) {
676	>	if (t instanceof Error)
677	>	throw (Error) t;
678	>	else if (t instanceof RuntimeException)
679	>	throw (RuntimeException) t;
680	>	else if (t instanceof Exception)
681	>	throw (Exception) t;
682	>	else {
683	>	AssertionFailedError afe =
684	>	new AssertionFailedError(t.toString());
685	>	afe.initCause(t);
686	>	throw afe;
687	>	}
688	>	}
689	>
690	>	if (Thread.interrupted())
691	>	tearDownFail("interrupt status set in main thread");
692	>
693	>	checkForkJoinPoolThreadLeaks();
694		}
695
696		/**
697	<	* Fail, also setting status to indicate current testcase should fail
698	<	*/
697	>	* Finds missing PoolCleaners
698	>	*/
699	>	void checkForkJoinPoolThreadLeaks() throws InterruptedException {
700	>	Thread[] survivors = new Thread[7];
701	>	int count = Thread.enumerate(survivors);
702	>	for (int i = 0; i < count; i++) {
703	>	Thread thread = survivors[i];
704	>	String name = thread.getName();
705	>	if (name.startsWith("ForkJoinPool-")) {
706	>	// give thread some time to terminate
707	>	thread.join(LONG_DELAY_MS);
708	>	if (thread.isAlive())
709	>	tearDownFail("Found leaked ForkJoinPool thread thread=%s",
710	>	thread);
711	>	}
712	>	}
713	>
714	>	if (!ForkJoinPool.commonPool()
715	>	.awaitQuiescence(LONG_DELAY_MS, MILLISECONDS))
716	>	tearDownFail("ForkJoin common pool thread stuck");
717	>	}
718	>
719	>	/**
720	>	* Just like fail(reason), but additionally recording (using
721	>	* threadRecordFailure) any AssertionFailedError thrown, so that
722	>	* the current testcase will fail.
723	>	*/
724		public void threadFail(String reason) {
725	<	threadFailed = true;
726	<	fail(reason);
725	>	try {
726	>	fail(reason);
727	>	} catch (AssertionFailedError t) {
728	>	threadRecordFailure(t);
729	>	throw t;
730	>	}
731		}
732
733		/**
734	<	* If expression not true, set status to indicate current testcase
735	<	* should fail
736	<	*/
734	>	* Just like assertTrue(b), but additionally recording (using
735	>	* threadRecordFailure) any AssertionFailedError thrown, so that
736	>	* the current testcase will fail.
737	>	*/
738		public void threadAssertTrue(boolean b) {
739	<	if (!b) {
116	<	threadFailed = true;
739	>	try {
740		assertTrue(b);
741	+	} catch (AssertionFailedError t) {
742	+	threadRecordFailure(t);
743	+	throw t;
744		}
745		}
746
747		/**
748	<	* If expression not false, set status to indicate current testcase
749	<	* should fail
750	<	*/
748	>	* Just like assertFalse(b), but additionally recording (using
749	>	* threadRecordFailure) any AssertionFailedError thrown, so that
750	>	* the current testcase will fail.
751	>	*/
752		public void threadAssertFalse(boolean b) {
753	<	if (b) {
127	<	threadFailed = true;
753	>	try {
754		assertFalse(b);
755	+	} catch (AssertionFailedError t) {
756	+	threadRecordFailure(t);
757	+	throw t;
758		}
759		}
760
761		/**
762	<	* If argument not null, set status to indicate current testcase
763	<	* should fail
764	<	*/
762	>	* Just like assertNull(x), but additionally recording (using
763	>	* threadRecordFailure) any AssertionFailedError thrown, so that
764	>	* the current testcase will fail.
765	>	*/
766		public void threadAssertNull(Object x) {
767	<	if (x != null) {
138	<	threadFailed = true;
767	>	try {
768		assertNull(x);
769	+	} catch (AssertionFailedError t) {
770	+	threadRecordFailure(t);
771	+	throw t;
772		}
773		}
774
775		/**
776	<	* If arguments not equal, set status to indicate current testcase
777	<	* should fail
778	<	*/
776	>	* Just like assertEquals(x, y), but additionally recording (using
777	>	* threadRecordFailure) any AssertionFailedError thrown, so that
778	>	* the current testcase will fail.
779	>	*/
780		public void threadAssertEquals(long x, long y) {
781	<	if (x != y) {
149	<	threadFailed = true;
781	>	try {
782		assertEquals(x, y);
783	+	} catch (AssertionFailedError t) {
784	+	threadRecordFailure(t);
785	+	throw t;
786		}
787		}
788
789		/**
790	<	* If arguments not equal, set status to indicate current testcase
791	<	* should fail
792	<	*/
790	>	* Just like assertEquals(x, y), but additionally recording (using
791	>	* threadRecordFailure) any AssertionFailedError thrown, so that
792	>	* the current testcase will fail.
793	>	*/
794		public void threadAssertEquals(Object x, Object y) {
795	<	if (x != y && (x == null || !x.equals(y))) {
160	<	threadFailed = true;
795	>	try {
796		assertEquals(x, y);
797	+	} catch (AssertionFailedError fail) {
798	+	threadRecordFailure(fail);
799	+	throw fail;
800	+	} catch (Throwable fail) {
801	+	threadUnexpectedException(fail);
802	+	}
803	+	}
804	+
805	+	/**
806	+	* Just like assertSame(x, y), but additionally recording (using
807	+	* threadRecordFailure) any AssertionFailedError thrown, so that
808	+	* the current testcase will fail.
809	+	*/
810	+	public void threadAssertSame(Object x, Object y) {
811	+	try {
812	+	assertSame(x, y);
813	+	} catch (AssertionFailedError fail) {
814	+	threadRecordFailure(fail);
815	+	throw fail;
816		}
817		}
818
819		/**
820	<	* threadFail with message "should throw exception"
821	<	*/
820	>	* Calls threadFail with message "should throw exception".
821	>	*/
822		public void threadShouldThrow() {
823	<	threadFailed = true;
824	<	fail("should throw exception");
823	>	threadFail("should throw exception");
824	>	}
825	>
826	>	/**
827	>	* Calls threadFail with message "should throw" + exceptionName.
828	>	*/
829	>	public void threadShouldThrow(String exceptionName) {
830	>	threadFail("should throw " + exceptionName);
831	>	}
832	>
833	>	/**
834	>	* Records the given exception using {@link #threadRecordFailure},
835	>	* then rethrows the exception, wrapping it in an
836	>	* AssertionFailedError if necessary.
837	>	*/
838	>	public void threadUnexpectedException(Throwable t) {
839	>	threadRecordFailure(t);
840	>	t.printStackTrace();
841	>	if (t instanceof RuntimeException)
842	>	throw (RuntimeException) t;
843	>	else if (t instanceof Error)
844	>	throw (Error) t;
845	>	else {
846	>	AssertionFailedError afe =
847	>	new AssertionFailedError("unexpected exception: " + t);
848	>	afe.initCause(t);
849	>	throw afe;
850	>	}
851	>	}
852	>
853	>	/**
854	>	* Delays, via Thread.sleep, for the given millisecond delay, but
855	>	* if the sleep is shorter than specified, may re-sleep or yield
856	>	* until time elapses.  Ensures that the given time, as measured
857	>	* by System.nanoTime(), has elapsed.
858	>	*/
859	>	static void delay(long millis) throws InterruptedException {
860	>	long nanos = millis * (1000 * 1000);
861	>	final long wakeupTime = System.nanoTime() + nanos;
862	>	do {
863	>	if (millis > 0L)
864	>	Thread.sleep(millis);
865	>	else // too short to sleep
866	>	Thread.yield();
867	>	nanos = wakeupTime - System.nanoTime();
868	>	millis = nanos / (1000 * 1000);
869	>	} while (nanos >= 0L);
870	>	}
871	>
872	>	/**
873	>	* Allows use of try-with-resources with per-test thread pools.
874	>	*/
875	>	class PoolCleaner implements AutoCloseable {
876	>	private final ExecutorService pool;
877	>	public PoolCleaner(ExecutorService pool) { this.pool = pool; }
878	>	public void close() { joinPool(pool); }
879	>	}
880	>
881	>	/**
882	>	* An extension of PoolCleaner that has an action to release the pool.
883	>	*/
884	>	class PoolCleanerWithReleaser extends PoolCleaner {
885	>	private final Runnable releaser;
886	>	public PoolCleanerWithReleaser(ExecutorService pool, Runnable releaser) {
887	>	super(pool);
888	>	this.releaser = releaser;
889	>	}
890	>	public void close() {
891	>	try {
892	>	releaser.run();
893	>	} finally {
894	>	super.close();
895	>	}
896	>	}
897	>	}
898	>
899	>	PoolCleaner cleaner(ExecutorService pool) {
900	>	return new PoolCleaner(pool);
901	>	}
902	>
903	>	PoolCleaner cleaner(ExecutorService pool, Runnable releaser) {
904	>	return new PoolCleanerWithReleaser(pool, releaser);
905	>	}
906	>
907	>	PoolCleaner cleaner(ExecutorService pool, CountDownLatch latch) {
908	>	return new PoolCleanerWithReleaser(pool, releaser(latch));
909	>	}
910	>
911	>	Runnable releaser(final CountDownLatch latch) {
912	>	return new Runnable() { public void run() {
913	>	do { latch.countDown(); }
914	>	while (latch.getCount() > 0);
915	>	}};
916	>	}
917	>
918	>	PoolCleaner cleaner(ExecutorService pool, AtomicBoolean flag) {
919	>	return new PoolCleanerWithReleaser(pool, releaser(flag));
920	>	}
921	>
922	>	Runnable releaser(final AtomicBoolean flag) {
923	>	return new Runnable() { public void run() { flag.set(true); }};
924		}
925
926		/**
927	<	* threadFail with message "Unexpected exception"
927	>	* Waits out termination of a thread pool or fails doing so.
928		*/
929	<	public void threadUnexpectedException() {
930	<	threadFailed = true;
931	<	fail("Unexpected exception");
929	>	void joinPool(ExecutorService pool) {
930	>	try {
931	>	pool.shutdown();
932	>	if (!pool.awaitTermination(2 * LONG_DELAY_MS, MILLISECONDS)) {
933	>	try {
934	>	threadFail("ExecutorService " + pool +
935	>	" did not terminate in a timely manner");
936	>	} finally {
937	>	// last resort, for the benefit of subsequent tests
938	>	pool.shutdownNow();
939	>	pool.awaitTermination(MEDIUM_DELAY_MS, MILLISECONDS);
940	>	}
941	>	}
942	>	} catch (SecurityException ok) {
943	>	// Allowed in case test doesn't have privs
944	>	} catch (InterruptedException fail) {
945	>	threadFail("Unexpected InterruptedException");
946	>	}
947		}
948
949	+	/** Like Runnable, but with the freedom to throw anything */
950	+	interface Action { public void run() throws Throwable; }
951	+
952	+	/**
953	+	* Runs all the given actions in parallel, failing if any fail.
954	+	* Useful for running multiple variants of tests that are
955	+	* necessarily individually slow because they must block.
956	+	*/
957	+	void testInParallel(Action ... actions) {
958	+	ExecutorService pool = Executors.newCachedThreadPool();
959	+	try (PoolCleaner cleaner = cleaner(pool)) {
960	+	ArrayList<Future<?>> futures = new ArrayList<>(actions.length);
961	+	for (final Action action : actions)
962	+	futures.add(pool.submit(new CheckedRunnable() {
963	+	public void realRun() throws Throwable { action.run();}}));
964	+	for (Future<?> future : futures)
965	+	try {
966	+	assertNull(future.get(LONG_DELAY_MS, MILLISECONDS));
967	+	} catch (ExecutionException ex) {
968	+	threadUnexpectedException(ex.getCause());
969	+	} catch (Exception ex) {
970	+	threadUnexpectedException(ex);
971	+	}
972	+	}
973	+	}
974
975		/**
976	<	* Wait out termination of a thread pool or fail doing so
976	>	* A debugging tool to print stack traces of most threads, as jstack does.
977	>	* Uninteresting threads are filtered out.
978		*/
979	<	public void joinPool(ExecutorService exec) {
979	>	static void dumpTestThreads() {
980	>	ThreadMXBean threadMXBean = ManagementFactory.getThreadMXBean();
981	>	System.err.println("------ stacktrace dump start ------");
982	>	for (ThreadInfo info : threadMXBean.dumpAllThreads(true, true)) {
983	>	String name = info.getThreadName();
984	>	if ("Signal Dispatcher".equals(name))
985	>	continue;
986	>	if ("Reference Handler".equals(name)
987	>	&& info.getLockName().startsWith("java.lang.ref.Reference$Lock"))
988	>	continue;
989	>	if ("Finalizer".equals(name)
990	>	&& info.getLockName().startsWith("java.lang.ref.ReferenceQueue$Lock"))
991	>	continue;
992	>	if ("checkForWedgedTest".equals(name))
993	>	continue;
994	>	System.err.print(info);
995	>	}
996	>	System.err.println("------ stacktrace dump end ------");
997	>	}
998	>
999	>	/**
1000	>	* Checks that thread does not terminate within the default
1001	>	* millisecond delay of {@code timeoutMillis()}.
1002	>	*/
1003	>	void assertThreadStaysAlive(Thread thread) {
1004	>	assertThreadStaysAlive(thread, timeoutMillis());
1005	>	}
1006	>
1007	>	/**
1008	>	* Checks that thread does not terminate within the given millisecond delay.
1009	>	*/
1010	>	void assertThreadStaysAlive(Thread thread, long millis) {
1011	>	try {
1012	>	// No need to optimize the failing case via Thread.join.
1013	>	delay(millis);
1014	>	assertTrue(thread.isAlive());
1015	>	} catch (InterruptedException fail) {
1016	>	threadFail("Unexpected InterruptedException");
1017	>	}
1018	>	}
1019	>
1020	>	/**
1021	>	* Checks that the threads do not terminate within the default
1022	>	* millisecond delay of {@code timeoutMillis()}.
1023	>	*/
1024	>	void assertThreadsStayAlive(Thread... threads) {
1025	>	assertThreadsStayAlive(timeoutMillis(), threads);
1026	>	}
1027	>
1028	>	/**
1029	>	* Checks that the threads do not terminate within the given millisecond delay.
1030	>	*/
1031	>	void assertThreadsStayAlive(long millis, Thread... threads) {
1032		try {
1033	<	exec.shutdown();
1034	<	assertTrue(exec.awaitTermination(LONG_DELAY_MS, TimeUnit.MILLISECONDS));
1035	<	} catch(InterruptedException ie) {
1036	<	fail("Unexpected exception");
1033	>	// No need to optimize the failing case via Thread.join.
1034	>	delay(millis);
1035	>	for (Thread thread : threads)
1036	>	assertTrue(thread.isAlive());
1037	>	} catch (InterruptedException fail) {
1038	>	threadFail("Unexpected InterruptedException");
1039		}
1040		}
1041
1042	+	/**
1043	+	* Checks that future.get times out, with the default timeout of
1044	+	* {@code timeoutMillis()}.
1045	+	*/
1046	+	void assertFutureTimesOut(Future future) {
1047	+	assertFutureTimesOut(future, timeoutMillis());
1048	+	}
1049	+
1050	+	/**
1051	+	* Checks that future.get times out, with the given millisecond timeout.
1052	+	*/
1053	+	void assertFutureTimesOut(Future future, long timeoutMillis) {
1054	+	long startTime = System.nanoTime();
1055	+	try {
1056	+	future.get(timeoutMillis, MILLISECONDS);
1057	+	shouldThrow();
1058	+	} catch (TimeoutException success) {
1059	+	} catch (Exception fail) {
1060	+	threadUnexpectedException(fail);
1061	+	} finally { future.cancel(true); }
1062	+	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
1063	+	}
1064
1065		/**
1066	<	* fail with message "should throw exception"
1067	<	*/
1066	>	* Fails with message "should throw exception".
1067	>	*/
1068		public void shouldThrow() {
1069		fail("Should throw exception");
1070		}
1071
1072		/**
1073	<	* fail with message "Unexpected exception"
1073	>	* Fails with message "should throw " + exceptionName.
1074		*/
1075	<	public void unexpectedException() {
1076	<	fail("Unexpected exception");
1075	>	public void shouldThrow(String exceptionName) {
1076	>	fail("Should throw " + exceptionName);
1077		}
1078
209	–
1079		/**
1080		* The number of elements to place in collections, arrays, etc.
1081		*/
1082	<	static final int SIZE = 20;
1082	>	public static final int SIZE = 20;
1083
1084		// Some convenient Integer constants
1085
1086	<	static final Integer zero = new Integer(0);
1087	<	static final Integer one = new Integer(1);
1088	<	static final Integer two = new Integer(2);
1089	<	static final Integer three  = new Integer(3);
1090	<	static final Integer four  = new Integer(4);
1091	<	static final Integer five  = new Integer(5);
1092	<	static final Integer six = new Integer(6);
1093	<	static final Integer seven = new Integer(7);
1094	<	static final Integer eight = new Integer(8);
1095	<	static final Integer nine = new Integer(9);
1096	<	static final Integer m1  = new Integer(-1);
1097	<	static final Integer m2  = new Integer(-2);
1098	<	static final Integer m3  = new Integer(-3);
1099	<	static final Integer m4 = new Integer(-4);
1100	<	static final Integer m5 = new Integer(-5);
1101	<	static final Integer m10 = new Integer(-10);
1086	>	public static final Integer zero  = new Integer(0);
1087	>	public static final Integer one   = new Integer(1);
1088	>	public static final Integer two   = new Integer(2);
1089	>	public static final Integer three = new Integer(3);
1090	>	public static final Integer four  = new Integer(4);
1091	>	public static final Integer five  = new Integer(5);
1092	>	public static final Integer six   = new Integer(6);
1093	>	public static final Integer seven = new Integer(7);
1094	>	public static final Integer eight = new Integer(8);
1095	>	public static final Integer nine  = new Integer(9);
1096	>	public static final Integer m1  = new Integer(-1);
1097	>	public static final Integer m2  = new Integer(-2);
1098	>	public static final Integer m3  = new Integer(-3);
1099	>	public static final Integer m4  = new Integer(-4);
1100	>	public static final Integer m5  = new Integer(-5);
1101	>	public static final Integer m6  = new Integer(-6);
1102	>	public static final Integer m10 = new Integer(-10);
1103	>
1104	>	/**
1105	>	* Runs Runnable r with a security policy that permits precisely
1106	>	* the specified permissions.  If there is no current security
1107	>	* manager, the runnable is run twice, both with and without a
1108	>	* security manager.  We require that any security manager permit
1109	>	* getPolicy/setPolicy.
1110	>	*/
1111	>	public void runWithPermissions(Runnable r, Permission... permissions) {
1112	>	SecurityManager sm = System.getSecurityManager();
1113	>	if (sm == null) {
1114	>	r.run();
1115	>	}
1116	>	runWithSecurityManagerWithPermissions(r, permissions);
1117	>	}
1118	>
1119	>	/**
1120	>	* Runs Runnable r with a security policy that permits precisely
1121	>	* the specified permissions.  If there is no current security
1122	>	* manager, a temporary one is set for the duration of the
1123	>	* Runnable.  We require that any security manager permit
1124	>	* getPolicy/setPolicy.
1125	>	*/
1126	>	public void runWithSecurityManagerWithPermissions(Runnable r,
1127	>	Permission... permissions) {
1128	>	SecurityManager sm = System.getSecurityManager();
1129	>	if (sm == null) {
1130	>	Policy savedPolicy = Policy.getPolicy();
1131	>	try {
1132	>	Policy.setPolicy(permissivePolicy());
1133	>	System.setSecurityManager(new SecurityManager());
1134	>	runWithSecurityManagerWithPermissions(r, permissions);
1135	>	} finally {
1136	>	System.setSecurityManager(null);
1137	>	Policy.setPolicy(savedPolicy);
1138	>	}
1139	>	} else {
1140	>	Policy savedPolicy = Policy.getPolicy();
1141	>	AdjustablePolicy policy = new AdjustablePolicy(permissions);
1142	>	Policy.setPolicy(policy);
1143
1144	+	try {
1145	+	r.run();
1146	+	} finally {
1147	+	policy.addPermission(new SecurityPermission("setPolicy"));
1148	+	Policy.setPolicy(savedPolicy);
1149	+	}
1150	+	}
1151	+	}
1152
1153	<	// Some convenient Runnable classes
1153	>	/**
1154	>	* Runs a runnable without any permissions.
1155	>	*/
1156	>	public void runWithoutPermissions(Runnable r) {
1157	>	runWithPermissions(r);
1158	>	}
1159
1160	<	static class NoOpRunnable implements Runnable {
1161	<	public void run() {}
1160	>	/**
1161	>	* A security policy where new permissions can be dynamically added
1162	>	* or all cleared.
1163	>	*/
1164	>	public static class AdjustablePolicy extends java.security.Policy {
1165	>	Permissions perms = new Permissions();
1166	>	AdjustablePolicy(Permission... permissions) {
1167	>	for (Permission permission : permissions)
1168	>	perms.add(permission);
1169	>	}
1170	>	void addPermission(Permission perm) { perms.add(perm); }
1171	>	void clearPermissions() { perms = new Permissions(); }
1172	>	public PermissionCollection getPermissions(CodeSource cs) {
1173	>	return perms;
1174	>	}
1175	>	public PermissionCollection getPermissions(ProtectionDomain pd) {
1176	>	return perms;
1177	>	}
1178	>	public boolean implies(ProtectionDomain pd, Permission p) {
1179	>	return perms.implies(p);
1180	>	}
1181	>	public void refresh() {}
1182	>	public String toString() {
1183	>	List<Permission> ps = new ArrayList<Permission>();
1184	>	for (Enumeration<Permission> e = perms.elements(); e.hasMoreElements();)
1185	>	ps.add(e.nextElement());
1186	>	return "AdjustablePolicy with permissions " + ps;
1187	>	}
1188		}
1189
1190	<	static class NoOpCallable implements Callable {
1191	<	public Object call() { return Boolean.TRUE; }
1190	>	/**
1191	>	* Returns a policy containing all the permissions we ever need.
1192	>	*/
1193	>	public static Policy permissivePolicy() {
1194	>	return new AdjustablePolicy
1195	>	// Permissions j.u.c. needs directly
1196	>	(new RuntimePermission("modifyThread"),
1197	>	new RuntimePermission("getClassLoader"),
1198	>	new RuntimePermission("setContextClassLoader"),
1199	>	// Permissions needed to change permissions!
1200	>	new SecurityPermission("getPolicy"),
1201	>	new SecurityPermission("setPolicy"),
1202	>	new RuntimePermission("setSecurityManager"),
1203	>	// Permissions needed by the junit test harness
1204	>	new RuntimePermission("accessDeclaredMembers"),
1205	>	new PropertyPermission("*", "read"),
1206	>	new java.io.FilePermission("<<ALL FILES>>", "read"));
1207		}
1208
1209	<	class ShortRunnable implements Runnable {
1210	<	public void run() {
1211	<	try {
1212	<	Thread.sleep(SHORT_DELAY_MS);
1209	>	/**
1210	>	* Sleeps until the given time has elapsed.
1211	>	* Throws AssertionFailedError if interrupted.
1212	>	*/
1213	>	void sleep(long millis) {
1214	>	try {
1215	>	delay(millis);
1216	>	} catch (InterruptedException fail) {
1217	>	AssertionFailedError afe =
1218	>	new AssertionFailedError("Unexpected InterruptedException");
1219	>	afe.initCause(fail);
1220	>	throw afe;
1221	>	}
1222	>	}
1223	>
1224	>	/**
1225	>	* Spin-waits up to the specified number of milliseconds for the given
1226	>	* thread to enter a wait state: BLOCKED, WAITING, or TIMED_WAITING.
1227	>	*/
1228	>	void waitForThreadToEnterWaitState(Thread thread, long timeoutMillis) {
1229	>	long startTime = System.nanoTime();
1230	>	for (;;) {
1231	>	Thread.State s = thread.getState();
1232	>	if (s == Thread.State.BLOCKED ||
1233	>	s == Thread.State.WAITING ||
1234	>	s == Thread.State.TIMED_WAITING)
1235	>	return;
1236	>	else if (s == Thread.State.TERMINATED)
1237	>	fail("Unexpected thread termination");
1238	>	else if (millisElapsedSince(startTime) > timeoutMillis) {
1239	>	threadAssertTrue(thread.isAlive());
1240	>	return;
1241		}
1242	<	catch(Exception e) {
1243	<	threadUnexpectedException();
1242	>	Thread.yield();
1243	>	}
1244	>	}
1245	>
1246	>	/**
1247	>	* Waits up to LONG_DELAY_MS for the given thread to enter a wait
1248	>	* state: BLOCKED, WAITING, or TIMED_WAITING.
1249	>	*/
1250	>	void waitForThreadToEnterWaitState(Thread thread) {
1251	>	waitForThreadToEnterWaitState(thread, LONG_DELAY_MS);
1252	>	}
1253	>
1254	>	/**
1255	>	* Returns the number of milliseconds since time given by
1256	>	* startNanoTime, which must have been previously returned from a
1257	>	* call to {@link System#nanoTime()}.
1258	>	*/
1259	>	static long millisElapsedSince(long startNanoTime) {
1260	>	return NANOSECONDS.toMillis(System.nanoTime() - startNanoTime);
1261	>	}
1262	>
1263	>	//     void assertTerminatesPromptly(long timeoutMillis, Runnable r) {
1264	>	//         long startTime = System.nanoTime();
1265	>	//         try {
1266	>	//             r.run();
1267	>	//         } catch (Throwable fail) { threadUnexpectedException(fail); }
1268	>	//         if (millisElapsedSince(startTime) > timeoutMillis/2)
1269	>	//             throw new AssertionFailedError("did not return promptly");
1270	>	//     }
1271	>
1272	>	//     void assertTerminatesPromptly(Runnable r) {
1273	>	//         assertTerminatesPromptly(LONG_DELAY_MS/2, r);
1274	>	//     }
1275	>
1276	>	/**
1277	>	* Checks that timed f.get() returns the expected value, and does not
1278	>	* wait for the timeout to elapse before returning.
1279	>	*/
1280	>	<T> void checkTimedGet(Future<T> f, T expectedValue, long timeoutMillis) {
1281	>	long startTime = System.nanoTime();
1282	>	try {
1283	>	assertEquals(expectedValue, f.get(timeoutMillis, MILLISECONDS));
1284	>	} catch (Throwable fail) { threadUnexpectedException(fail); }
1285	>	if (millisElapsedSince(startTime) > timeoutMillis/2)
1286	>	throw new AssertionFailedError("timed get did not return promptly");
1287	>	}
1288	>
1289	>	<T> void checkTimedGet(Future<T> f, T expectedValue) {
1290	>	checkTimedGet(f, expectedValue, LONG_DELAY_MS);
1291	>	}
1292	>
1293	>	/**
1294	>	* Returns a new started daemon Thread running the given runnable.
1295	>	*/
1296	>	Thread newStartedThread(Runnable runnable) {
1297	>	Thread t = new Thread(runnable);
1298	>	t.setDaemon(true);
1299	>	t.start();
1300	>	return t;
1301	>	}
1302	>
1303	>	/**
1304	>	* Waits for the specified time (in milliseconds) for the thread
1305	>	* to terminate (using {@link Thread#join(long)}), else interrupts
1306	>	* the thread (in the hope that it may terminate later) and fails.
1307	>	*/
1308	>	void awaitTermination(Thread t, long timeoutMillis) {
1309	>	try {
1310	>	t.join(timeoutMillis);
1311	>	} catch (InterruptedException fail) {
1312	>	threadUnexpectedException(fail);
1313	>	} finally {
1314	>	if (t.getState() != Thread.State.TERMINATED) {
1315	>	t.interrupt();
1316	>	threadFail("timed out waiting for thread to terminate");
1317		}
1318		}
1319		}
1320
1321	<	class ShortInterruptedRunnable implements Runnable {
1322	<	public void run() {
1321	>	/**
1322	>	* Waits for LONG_DELAY_MS milliseconds for the thread to
1323	>	* terminate (using {@link Thread#join(long)}), else interrupts
1324	>	* the thread (in the hope that it may terminate later) and fails.
1325	>	*/
1326	>	void awaitTermination(Thread t) {
1327	>	awaitTermination(t, LONG_DELAY_MS);
1328	>	}
1329	>
1330	>	// Some convenient Runnable classes
1331	>
1332	>	public abstract class CheckedRunnable implements Runnable {
1333	>	protected abstract void realRun() throws Throwable;
1334	>
1335	>	public final void run() {
1336		try {
1337	<	Thread.sleep(SHORT_DELAY_MS);
1338	<	threadShouldThrow();
1339	<	}
262	<	catch(InterruptedException success) {
1337	>	realRun();
1338	>	} catch (Throwable fail) {
1339	>	threadUnexpectedException(fail);
1340		}
1341		}
1342		}
1343
1344	<	class SmallRunnable implements Runnable {
1345	<	public void run() {
1344	>	public abstract class RunnableShouldThrow implements Runnable {
1345	>	protected abstract void realRun() throws Throwable;
1346	>
1347	>	final Class<?> exceptionClass;
1348	>
1349	>	<T extends Throwable> RunnableShouldThrow(Class<T> exceptionClass) {
1350	>	this.exceptionClass = exceptionClass;
1351	>	}
1352	>
1353	>	public final void run() {
1354		try {
1355	<	Thread.sleep(SMALL_DELAY_MS);
1356	<	}
1357	<	catch(Exception e) {
1358	<	threadUnexpectedException();
1355	>	realRun();
1356	>	threadShouldThrow(exceptionClass.getSimpleName());
1357	>	} catch (Throwable t) {
1358	>	if (! exceptionClass.isInstance(t))
1359	>	threadUnexpectedException(t);
1360		}
1361		}
1362		}
1363
1364	<	class SmallCallable implements Callable {
1365	<	public Object call() {
1364	>	public abstract class ThreadShouldThrow extends Thread {
1365	>	protected abstract void realRun() throws Throwable;
1366	>
1367	>	final Class<?> exceptionClass;
1368	>
1369	>	<T extends Throwable> ThreadShouldThrow(Class<T> exceptionClass) {
1370	>	this.exceptionClass = exceptionClass;
1371	>	}
1372	>
1373	>	public final void run() {
1374		try {
1375	<	Thread.sleep(SMALL_DELAY_MS);
1376	<	}
1377	<	catch(Exception e) {
1378	<	threadUnexpectedException();
1375	>	realRun();
1376	>	threadShouldThrow(exceptionClass.getSimpleName());
1377	>	} catch (Throwable t) {
1378	>	if (! exceptionClass.isInstance(t))
1379	>	threadUnexpectedException(t);
1380		}
286	–	return Boolean.TRUE;
1381		}
1382		}
1383
1384	<	class SmallInterruptedRunnable implements Runnable {
1385	<	public void run() {
1384	>	public abstract class CheckedInterruptedRunnable implements Runnable {
1385	>	protected abstract void realRun() throws Throwable;
1386	>
1387	>	public final void run() {
1388		try {
1389	<	Thread.sleep(SMALL_DELAY_MS);
1390	<	threadShouldThrow();
1391	<	}
1392	<	catch(InterruptedException success) {
1389	>	realRun();
1390	>	threadShouldThrow("InterruptedException");
1391	>	} catch (InterruptedException success) {
1392	>	threadAssertFalse(Thread.interrupted());
1393	>	} catch (Throwable fail) {
1394	>	threadUnexpectedException(fail);
1395		}
1396		}
1397		}
1398
1399	+	public abstract class CheckedCallable<T> implements Callable<T> {
1400	+	protected abstract T realCall() throws Throwable;
1401
1402	<	class MediumRunnable implements Runnable {
303	<	public void run() {
1402	>	public final T call() {
1403		try {
1404	<	Thread.sleep(MEDIUM_DELAY_MS);
1405	<	}
1406	<	catch(Exception e) {
1407	<	threadUnexpectedException();
1404	>	return realCall();
1405	>	} catch (Throwable fail) {
1406	>	threadUnexpectedException(fail);
1407	>	return null;
1408		}
1409		}
1410		}
1411
1412	<	class MediumInterruptedRunnable implements Runnable {
1413	<	public void run() {
1412	>	public abstract class CheckedInterruptedCallable<T>
1413	>	implements Callable<T> {
1414	>	protected abstract T realCall() throws Throwable;
1415	>
1416	>	public final T call() {
1417		try {
1418	<	Thread.sleep(MEDIUM_DELAY_MS);
1419	<	threadShouldThrow();
1420	<	}
1421	<	catch(InterruptedException success) {
1418	>	T result = realCall();
1419	>	threadShouldThrow("InterruptedException");
1420	>	return result;
1421	>	} catch (InterruptedException success) {
1422	>	threadAssertFalse(Thread.interrupted());
1423	>	} catch (Throwable fail) {
1424	>	threadUnexpectedException(fail);
1425		}
1426	+	return null;
1427		}
1428		}
1429
1430	<	class MediumPossiblyInterruptedRunnable implements Runnable {
1431	<	public void run() {
1430	>	public static class NoOpRunnable implements Runnable {
1431	>	public void run() {}
1432	>	}
1433	>
1434	>	public static class NoOpCallable implements Callable {
1435	>	public Object call() { return Boolean.TRUE; }
1436	>	}
1437	>
1438	>	public static final String TEST_STRING = "a test string";
1439	>
1440	>	public static class StringTask implements Callable<String> {
1441	>	final String value;
1442	>	public StringTask() { this(TEST_STRING); }
1443	>	public StringTask(String value) { this.value = value; }
1444	>	public String call() { return value; }
1445	>	}
1446	>
1447	>	public Callable<String> latchAwaitingStringTask(final CountDownLatch latch) {
1448	>	return new CheckedCallable<String>() {
1449	>	protected String realCall() {
1450	>	try {
1451	>	latch.await();
1452	>	} catch (InterruptedException quittingTime) {}
1453	>	return TEST_STRING;
1454	>	}};
1455	>	}
1456	>
1457	>	public Runnable countDowner(final CountDownLatch latch) {
1458	>	return new CheckedRunnable() {
1459	>	public void realRun() throws InterruptedException {
1460	>	latch.countDown();
1461	>	}};
1462	>	}
1463	>
1464	>	class LatchAwaiter extends CheckedRunnable {
1465	>	static final int NEW = 0;
1466	>	static final int RUNNING = 1;
1467	>	static final int DONE = 2;
1468	>	final CountDownLatch latch;
1469	>	int state = NEW;
1470	>	LatchAwaiter(CountDownLatch latch) { this.latch = latch; }
1471	>	public void realRun() throws InterruptedException {
1472	>	state = 1;
1473	>	await(latch);
1474	>	state = 2;
1475	>	}
1476	>	}
1477	>
1478	>	public LatchAwaiter awaiter(CountDownLatch latch) {
1479	>	return new LatchAwaiter(latch);
1480	>	}
1481	>
1482	>	public void await(CountDownLatch latch, long timeoutMillis) {
1483	>	try {
1484	>	if (!latch.await(timeoutMillis, MILLISECONDS))
1485	>	fail("timed out waiting for CountDownLatch for "
1486	>	+ (timeoutMillis/1000) + " sec");
1487	>	} catch (Throwable fail) {
1488	>	threadUnexpectedException(fail);
1489	>	}
1490	>	}
1491	>
1492	>	public void await(CountDownLatch latch) {
1493	>	await(latch, LONG_DELAY_MS);
1494	>	}
1495	>
1496	>	public void await(Semaphore semaphore) {
1497	>	try {
1498	>	if (!semaphore.tryAcquire(LONG_DELAY_MS, MILLISECONDS))
1499	>	fail("timed out waiting for Semaphore for "
1500	>	+ (LONG_DELAY_MS/1000) + " sec");
1501	>	} catch (Throwable fail) {
1502	>	threadUnexpectedException(fail);
1503	>	}
1504	>	}
1505	>
1506	>	//     /**
1507	>	//      * Spin-waits up to LONG_DELAY_MS until flag becomes true.
1508	>	//      */
1509	>	//     public void await(AtomicBoolean flag) {
1510	>	//         await(flag, LONG_DELAY_MS);
1511	>	//     }
1512	>
1513	>	//     /**
1514	>	//      * Spin-waits up to the specified timeout until flag becomes true.
1515	>	//      */
1516	>	//     public void await(AtomicBoolean flag, long timeoutMillis) {
1517	>	//         long startTime = System.nanoTime();
1518	>	//         while (!flag.get()) {
1519	>	//             if (millisElapsedSince(startTime) > timeoutMillis)
1520	>	//                 throw new AssertionFailedError("timed out");
1521	>	//             Thread.yield();
1522	>	//         }
1523	>	//     }
1524	>
1525	>	public static class NPETask implements Callable<String> {
1526	>	public String call() { throw new NullPointerException(); }
1527	>	}
1528	>
1529	>	public static class CallableOne implements Callable<Integer> {
1530	>	public Integer call() { return one; }
1531	>	}
1532	>
1533	>	public class ShortRunnable extends CheckedRunnable {
1534	>	protected void realRun() throws Throwable {
1535	>	delay(SHORT_DELAY_MS);
1536	>	}
1537	>	}
1538	>
1539	>	public class ShortInterruptedRunnable extends CheckedInterruptedRunnable {
1540	>	protected void realRun() throws InterruptedException {
1541	>	delay(SHORT_DELAY_MS);
1542	>	}
1543	>	}
1544	>
1545	>	public class SmallRunnable extends CheckedRunnable {
1546	>	protected void realRun() throws Throwable {
1547	>	delay(SMALL_DELAY_MS);
1548	>	}
1549	>	}
1550	>
1551	>	public class SmallPossiblyInterruptedRunnable extends CheckedRunnable {
1552	>	protected void realRun() {
1553		try {
1554	<	Thread.sleep(MEDIUM_DELAY_MS);
1555	<	}
1556	<	catch(InterruptedException success) {
1557	<	}
1554	>	delay(SMALL_DELAY_MS);
1555	>	} catch (InterruptedException ok) {}
1556	>	}
1557	>	}
1558	>
1559	>	public class SmallCallable extends CheckedCallable {
1560	>	protected Object realCall() throws InterruptedException {
1561	>	delay(SMALL_DELAY_MS);
1562	>	return Boolean.TRUE;
1563	>	}
1564	>	}
1565	>
1566	>	public class MediumRunnable extends CheckedRunnable {
1567	>	protected void realRun() throws Throwable {
1568	>	delay(MEDIUM_DELAY_MS);
1569	>	}
1570	>	}
1571	>
1572	>	public class MediumInterruptedRunnable extends CheckedInterruptedRunnable {
1573	>	protected void realRun() throws InterruptedException {
1574	>	delay(MEDIUM_DELAY_MS);
1575	>	}
1576	>	}
1577	>
1578	>	public Runnable possiblyInterruptedRunnable(final long timeoutMillis) {
1579	>	return new CheckedRunnable() {
1580	>	protected void realRun() {
1581	>	try {
1582	>	delay(timeoutMillis);
1583	>	} catch (InterruptedException ok) {}
1584	>	}};
1585	>	}
1586	>
1587	>	public class MediumPossiblyInterruptedRunnable extends CheckedRunnable {
1588	>	protected void realRun() {
1589	>	try {
1590	>	delay(MEDIUM_DELAY_MS);
1591	>	} catch (InterruptedException ok) {}
1592	>	}
1593	>	}
1594	>
1595	>	public class LongPossiblyInterruptedRunnable extends CheckedRunnable {
1596	>	protected void realRun() {
1597	>	try {
1598	>	delay(LONG_DELAY_MS);
1599	>	} catch (InterruptedException ok) {}
1600		}
1601		}
1602
1603		/**
1604		* For use as ThreadFactory in constructors
1605		*/
1606	<	static class SimpleThreadFactory implements ThreadFactory{
1607	<	public Thread newThread(Runnable r){
1606	>	public static class SimpleThreadFactory implements ThreadFactory {
1607	>	public Thread newThread(Runnable r) {
1608		return new Thread(r);
1609	<	}
1609	>	}
1610	>	}
1611	>
1612	>	public interface TrackedRunnable extends Runnable {
1613	>	boolean isDone();
1614	>	}
1615	>
1616	>	public static TrackedRunnable trackedRunnable(final long timeoutMillis) {
1617	>	return new TrackedRunnable() {
1618	>	private volatile boolean done = false;
1619	>	public boolean isDone() { return done; }
1620	>	public void run() {
1621	>	try {
1622	>	delay(timeoutMillis);
1623	>	done = true;
1624	>	} catch (InterruptedException ok) {}
1625	>	}
1626	>	};
1627		}
1628
1629	<	static class TrackedRunnable implements Runnable {
1630	<	volatile boolean done = false;
1629	>	public static class TrackedShortRunnable implements Runnable {
1630	>	public volatile boolean done = false;
1631		public void run() {
1632		try {
1633	<	Thread.sleep(SMALL_DELAY_MS);
1633	>	delay(SHORT_DELAY_MS);
1634		done = true;
1635	<	} catch(Exception e){
1636	<	}
1635	>	} catch (InterruptedException ok) {}
1636	>	}
1637	>	}
1638	>
1639	>	public static class TrackedSmallRunnable implements Runnable {
1640	>	public volatile boolean done = false;
1641	>	public void run() {
1642	>	try {
1643	>	delay(SMALL_DELAY_MS);
1644	>	done = true;
1645	>	} catch (InterruptedException ok) {}
1646	>	}
1647	>	}
1648	>
1649	>	public static class TrackedMediumRunnable implements Runnable {
1650	>	public volatile boolean done = false;
1651	>	public void run() {
1652	>	try {
1653	>	delay(MEDIUM_DELAY_MS);
1654	>	done = true;
1655	>	} catch (InterruptedException ok) {}
1656	>	}
1657	>	}
1658	>
1659	>	public static class TrackedLongRunnable implements Runnable {
1660	>	public volatile boolean done = false;
1661	>	public void run() {
1662	>	try {
1663	>	delay(LONG_DELAY_MS);
1664	>	done = true;
1665	>	} catch (InterruptedException ok) {}
1666	>	}
1667	>	}
1668	>
1669	>	public static class TrackedNoOpRunnable implements Runnable {
1670	>	public volatile boolean done = false;
1671	>	public void run() {
1672	>	done = true;
1673		}
1674		}
1675
1676	<	static class TrackedCallable implements Callable {
1677	<	volatile boolean done = false;
1676	>	public static class TrackedCallable implements Callable {
1677	>	public volatile boolean done = false;
1678		public Object call() {
1679		try {
1680	<	Thread.sleep(SMALL_DELAY_MS);
1680	>	delay(SMALL_DELAY_MS);
1681		done = true;
1682	<	} catch(Exception e){
361	<	}
1682	>	} catch (InterruptedException ok) {}
1683		return Boolean.TRUE;
1684		}
1685		}
1686
1687		/**
1688	+	* Analog of CheckedRunnable for RecursiveAction
1689	+	*/
1690	+	public abstract class CheckedRecursiveAction extends RecursiveAction {
1691	+	protected abstract void realCompute() throws Throwable;
1692	+
1693	+	@Override protected final void compute() {
1694	+	try {
1695	+	realCompute();
1696	+	} catch (Throwable fail) {
1697	+	threadUnexpectedException(fail);
1698	+	}
1699	+	}
1700	+	}
1701	+
1702	+	/**
1703	+	* Analog of CheckedCallable for RecursiveTask
1704	+	*/
1705	+	public abstract class CheckedRecursiveTask<T> extends RecursiveTask<T> {
1706	+	protected abstract T realCompute() throws Throwable;
1707	+
1708	+	@Override protected final T compute() {
1709	+	try {
1710	+	return realCompute();
1711	+	} catch (Throwable fail) {
1712	+	threadUnexpectedException(fail);
1713	+	return null;
1714	+	}
1715	+	}
1716	+	}
1717	+
1718	+	/**
1719		* For use as RejectedExecutionHandler in constructors
1720		*/
1721	<	static class NoOpREHandler implements RejectedExecutionHandler{
1722	<	public void rejectedExecution(Runnable r, ThreadPoolExecutor executor){}
1721	>	public static class NoOpREHandler implements RejectedExecutionHandler {
1722	>	public void rejectedExecution(Runnable r,
1723	>	ThreadPoolExecutor executor) {}
1724	>	}
1725	>
1726	>	/**
1727	>	* A CyclicBarrier that uses timed await and fails with
1728	>	* AssertionFailedErrors instead of throwing checked exceptions.
1729	>	*/
1730	>	public class CheckedBarrier extends CyclicBarrier {
1731	>	public CheckedBarrier(int parties) { super(parties); }
1732	>
1733	>	public int await() {
1734	>	try {
1735	>	return super.await(2 * LONG_DELAY_MS, MILLISECONDS);
1736	>	} catch (TimeoutException timedOut) {
1737	>	throw new AssertionFailedError("timed out");
1738	>	} catch (Exception fail) {
1739	>	AssertionFailedError afe =
1740	>	new AssertionFailedError("Unexpected exception: " + fail);
1741	>	afe.initCause(fail);
1742	>	throw afe;
1743	>	}
1744	>	}
1745	>	}
1746	>
1747	>	void checkEmpty(BlockingQueue q) {
1748	>	try {
1749	>	assertTrue(q.isEmpty());
1750	>	assertEquals(0, q.size());
1751	>	assertNull(q.peek());
1752	>	assertNull(q.poll());
1753	>	assertNull(q.poll(0, MILLISECONDS));
1754	>	assertEquals(q.toString(), "[]");
1755	>	assertTrue(Arrays.equals(q.toArray(), new Object[0]));
1756	>	assertFalse(q.iterator().hasNext());
1757	>	try {
1758	>	q.element();
1759	>	shouldThrow();
1760	>	} catch (NoSuchElementException success) {}
1761	>	try {
1762	>	q.iterator().next();
1763	>	shouldThrow();
1764	>	} catch (NoSuchElementException success) {}
1765	>	try {
1766	>	q.remove();
1767	>	shouldThrow();
1768	>	} catch (NoSuchElementException success) {}
1769	>	} catch (InterruptedException fail) { threadUnexpectedException(fail); }
1770	>	}
1771	>
1772	>	void assertSerialEquals(Object x, Object y) {
1773	>	assertTrue(Arrays.equals(serialBytes(x), serialBytes(y)));
1774	>	}
1775	>
1776	>	void assertNotSerialEquals(Object x, Object y) {
1777	>	assertFalse(Arrays.equals(serialBytes(x), serialBytes(y)));
1778	>	}
1779	>
1780	>	byte[] serialBytes(Object o) {
1781	>	try {
1782	>	ByteArrayOutputStream bos = new ByteArrayOutputStream();
1783	>	ObjectOutputStream oos = new ObjectOutputStream(bos);
1784	>	oos.writeObject(o);
1785	>	oos.flush();
1786	>	oos.close();
1787	>	return bos.toByteArray();
1788	>	} catch (Throwable fail) {
1789	>	threadUnexpectedException(fail);
1790	>	return new byte[0];
1791	>	}
1792	>	}
1793	>
1794	>	@SuppressWarnings("unchecked")
1795	>	<T> T serialClone(T o) {
1796	>	try {
1797	>	ObjectInputStream ois = new ObjectInputStream
1798	>	(new ByteArrayInputStream(serialBytes(o)));
1799	>	T clone = (T) ois.readObject();
1800	>	assertSame(o.getClass(), clone.getClass());
1801	>	return clone;
1802	>	} catch (Throwable fail) {
1803	>	threadUnexpectedException(fail);
1804	>	return null;
1805	>	}
1806	>	}
1807	>
1808	>	public void assertThrows(Class<? extends Throwable> expectedExceptionClass,
1809	>	Runnable... throwingActions) {
1810	>	for (Runnable throwingAction : throwingActions) {
1811	>	boolean threw = false;
1812	>	try { throwingAction.run(); }
1813	>	catch (Throwable t) {
1814	>	threw = true;
1815	>	if (!expectedExceptionClass.isInstance(t)) {
1816	>	AssertionFailedError afe =
1817	>	new AssertionFailedError
1818	>	("Expected " + expectedExceptionClass.getName() +
1819	>	", got " + t.getClass().getName());
1820	>	afe.initCause(t);
1821	>	threadUnexpectedException(afe);
1822	>	}
1823	>	}
1824	>	if (!threw)
1825	>	shouldThrow(expectedExceptionClass.getName());
1826	>	}
1827	>	}
1828	>
1829	>	public void assertIteratorExhausted(Iterator<?> it) {
1830	>	try {
1831	>	it.next();
1832	>	shouldThrow();
1833	>	} catch (NoSuchElementException success) {}
1834	>	assertFalse(it.hasNext());
1835	>	}
1836	>
1837	>	public <T> Callable<T> callableThrowing(final Exception ex) {
1838	>	return new Callable<T>() { public T call() throws Exception { throw ex; }};
1839	>	}
1840	>
1841	>	public Runnable runnableThrowing(final RuntimeException ex) {
1842	>	return new Runnable() { public void run() { throw ex; }};
1843		}
372	–
373	–
1844		}

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