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

Comparing jsr166/src/test/tck/JSR166TestCase.java (file contents):
Revision 1.62 by jsr166, Mon Oct 11 05:40:41 2010 UTC vs.
Revision 1.233 by jsr166, Sat Jul 15 23:15:21 2017 UTC

#	Line 1 | Line 1
1		/*
2	<	* Written by Doug Lea with assistance from members of JCP JSR-166
3	<	* Expert Group and released to the public domain, as explained at
4	<	* http://creativecommons.org/licenses/publicdomain
2	>	* Written by Doug Lea and Martin Buchholz with assistance from
3	>	* members of JCP JSR-166 Expert Group and released to the public
4	>	* domain, as explained at
5	>	* http://creativecommons.org/publicdomain/zero/1.0/
6		* Other contributors include Andrew Wright, Jeffrey Hayes,
7		* Pat Fisher, Mike Judd.
8		*/
9
10	<	import junit.framework.*;
11	<	import java.util.PropertyPermission;
12	<	import java.util.concurrent.*;
13	<	import java.util.concurrent.atomic.AtomicReference;
10	>	/*
11	>	* @test
12	>	* @summary JSR-166 tck tests, in a number of variations.
13	>	*          The first is the conformance testing variant,
14	>	*          while others also test implementation details.
15	>	* @build *
16	>	* @modules java.management
17	>	* @run junit/othervm/timeout=1000 JSR166TestCase
18	>	* @run junit/othervm/timeout=1000
19	>	*      --add-opens java.base/java.util.concurrent=ALL-UNNAMED
20	>	*      --add-opens java.base/java.lang=ALL-UNNAMED
21	>	*      -Djsr166.testImplementationDetails=true
22	>	*      JSR166TestCase
23	>	* @run junit/othervm/timeout=1000
24	>	*      --add-opens java.base/java.util.concurrent=ALL-UNNAMED
25	>	*      --add-opens java.base/java.lang=ALL-UNNAMED
26	>	*      -Djsr166.testImplementationDetails=true
27	>	*      -Djava.util.concurrent.ForkJoinPool.common.parallelism=0
28	>	*      JSR166TestCase
29	>	* @run junit/othervm/timeout=1000
30	>	*      --add-opens java.base/java.util.concurrent=ALL-UNNAMED
31	>	*      --add-opens java.base/java.lang=ALL-UNNAMED
32	>	*      -Djsr166.testImplementationDetails=true
33	>	*      -Djava.util.concurrent.ForkJoinPool.common.parallelism=1
34	>	*      -Djava.util.secureRandomSeed=true
35	>	*      JSR166TestCase
36	>	* @run junit/othervm/timeout=1000/policy=tck.policy
37	>	*      --add-opens java.base/java.util.concurrent=ALL-UNNAMED
38	>	*      --add-opens java.base/java.lang=ALL-UNNAMED
39	>	*      -Djsr166.testImplementationDetails=true
40	>	*      JSR166TestCase
41	>	*/
42	>
43		import static java.util.concurrent.TimeUnit.MILLISECONDS;
44	+	import static java.util.concurrent.TimeUnit.MINUTES;
45	+	import static java.util.concurrent.TimeUnit.NANOSECONDS;
46	+
47	+	import java.io.ByteArrayInputStream;
48	+	import java.io.ByteArrayOutputStream;
49	+	import java.io.ObjectInputStream;
50	+	import java.io.ObjectOutputStream;
51	+	import java.lang.management.ManagementFactory;
52	+	import java.lang.management.ThreadInfo;
53	+	import java.lang.management.ThreadMXBean;
54	+	import java.lang.reflect.Constructor;
55	+	import java.lang.reflect.Method;
56	+	import java.lang.reflect.Modifier;
57		import java.security.CodeSource;
58		import java.security.Permission;
59		import java.security.PermissionCollection;
#	Line 18 | Line 61 | import java.security.Permissions;
61		import java.security.Policy;
62		import java.security.ProtectionDomain;
63		import java.security.SecurityPermission;
64	+	import java.util.ArrayList;
65	+	import java.util.Arrays;
66	+	import java.util.Collection;
67	+	import java.util.Collections;
68	+	import java.util.Date;
69	+	import java.util.Enumeration;
70	+	import java.util.Iterator;
71	+	import java.util.List;
72	+	import java.util.NoSuchElementException;
73	+	import java.util.PropertyPermission;
74	+	import java.util.concurrent.BlockingQueue;
75	+	import java.util.concurrent.Callable;
76	+	import java.util.concurrent.CountDownLatch;
77	+	import java.util.concurrent.CyclicBarrier;
78	+	import java.util.concurrent.ExecutionException;
79	+	import java.util.concurrent.Executors;
80	+	import java.util.concurrent.ExecutorService;
81	+	import java.util.concurrent.ForkJoinPool;
82	+	import java.util.concurrent.Future;
83	+	import java.util.concurrent.RecursiveAction;
84	+	import java.util.concurrent.RecursiveTask;
85	+	import java.util.concurrent.RejectedExecutionHandler;
86	+	import java.util.concurrent.Semaphore;
87	+	import java.util.concurrent.SynchronousQueue;
88	+	import java.util.concurrent.ThreadFactory;
89	+	import java.util.concurrent.ThreadLocalRandom;
90	+	import java.util.concurrent.ThreadPoolExecutor;
91	+	import java.util.concurrent.TimeUnit;
92	+	import java.util.concurrent.TimeoutException;
93	+	import java.util.concurrent.atomic.AtomicBoolean;
94	+	import java.util.concurrent.atomic.AtomicReference;
95	+	import java.util.regex.Pattern;
96	+
97	+	import junit.framework.AssertionFailedError;
98	+	import junit.framework.Test;
99	+	import junit.framework.TestCase;
100	+	import junit.framework.TestResult;
101	+	import junit.framework.TestSuite;
102
103		/**
104		* Base class for JSR166 Junit TCK tests.  Defines some constants,
#	Line 29 | Line 110 | import java.security.SecurityPermission;
110		*
111		* <ol>
112		*
113	<	* <li> All assertions in code running in generated threads must use
113	>	* <li>All assertions in code running in generated threads must use
114		* the forms {@link #threadFail}, {@link #threadAssertTrue}, {@link
115		* #threadAssertEquals}, or {@link #threadAssertNull}, (not
116		* {@code fail}, {@code assertTrue}, etc.) It is OK (but not
117		* particularly recommended) for other code to use these forms too.
118		* Only the most typically used JUnit assertion methods are defined
119	<	* this way, but enough to live with.</li>
119	>	* this way, but enough to live with.
120		*
121	<	* <li> If you override {@link #setUp} or {@link #tearDown}, make sure
121	>	* <li>If you override {@link #setUp} or {@link #tearDown}, make sure
122		* to invoke {@code super.setUp} and {@code super.tearDown} within
123		* them. These methods are used to clear and check for thread
124	<	* assertion failures.</li>
124	>	* assertion failures.
125		*
126		* <li>All delays and timeouts must use one of the constants {@code
127		* SHORT_DELAY_MS}, {@code SMALL_DELAY_MS}, {@code MEDIUM_DELAY_MS},
#	Line 51 | Line 132 | import java.security.SecurityPermission;
132		* is always discriminable as larger than SHORT and smaller than
133		* MEDIUM.  And so on. These constants are set to conservative values,
134		* but even so, if there is ever any doubt, they can all be increased
135	<	* in one spot to rerun tests on slower platforms.</li>
135	>	* in one spot to rerun tests on slower platforms.
136		*
137	<	* <li> All threads generated must be joined inside each test case
137	>	* <li>All threads generated must be joined inside each test case
138		* method (or {@code fail} to do so) before returning from the
139		* method. The {@code joinPool} method can be used to do this when
140	<	* using Executors.</li>
140	>	* using Executors.
141		*
142		* </ol>
143		*
144	<	* <p> <b>Other notes</b>
144	>	* <p><b>Other notes</b>
145		* <ul>
146		*
147	<	* <li> Usually, there is one testcase method per JSR166 method
147	>	* <li>Usually, there is one testcase method per JSR166 method
148		* covering "normal" operation, and then as many exception-testing
149		* methods as there are exceptions the method can throw. Sometimes
150		* there are multiple tests per JSR166 method when the different
151		* "normal" behaviors differ significantly. And sometimes testcases
152	<	* cover multiple methods when they cannot be tested in
72	<	* isolation.</li>
152	>	* cover multiple methods when they cannot be tested in isolation.
153		*
154	<	* <li> The documentation style for testcases is to provide as javadoc
154	>	* <li>The documentation style for testcases is to provide as javadoc
155		* a simple sentence or two describing the property that the testcase
156		* method purports to test. The javadocs do not say anything about how
157	<	* the property is tested. To find out, read the code.</li>
157	>	* the property is tested. To find out, read the code.
158		*
159	<	* <li> These tests are "conformance tests", and do not attempt to
159	>	* <li>These tests are "conformance tests", and do not attempt to
160		* test throughput, latency, scalability or other performance factors
161		* (see the separate "jtreg" tests for a set intended to check these
162		* for the most central aspects of functionality.) So, most tests use
163		* the smallest sensible numbers of threads, collection sizes, etc
164	<	* needed to check basic conformance.</li>
164	>	* needed to check basic conformance.
165		*
166		* <li>The test classes currently do not declare inclusion in
167		* any particular package to simplify things for people integrating
168	<	* them in TCK test suites.</li>
168	>	* them in TCK test suites.
169		*
170	<	* <li> As a convenience, the {@code main} of this class (JSR166TestCase)
171	<	* runs all JSR166 unit tests.</li>
170	>	* <li>As a convenience, the {@code main} of this class (JSR166TestCase)
171	>	* runs all JSR166 unit tests.
172		*
173		* </ul>
174		*/
#	Line 100 | Line 180 | public class JSR166TestCase extends Test
180		Boolean.getBoolean("jsr166.expensiveTests");
181
182		/**
183	+	* If true, also run tests that are not part of the official tck
184	+	* because they test unspecified implementation details.
185	+	*/
186	+	protected static final boolean testImplementationDetails =
187	+	Boolean.getBoolean("jsr166.testImplementationDetails");
188	+
189	+	/**
190		* If true, report on stdout all "slow" tests, that is, ones that
191		* take more than profileThreshold milliseconds to execute.
192		*/
#	Line 113 | Line 200 | public class JSR166TestCase extends Test
200		private static final long profileThreshold =
201		Long.getLong("jsr166.profileThreshold", 100);
202
203	+	/**
204	+	* The number of repetitions per test (for tickling rare bugs).
205	+	*/
206	+	private static final int runsPerTest =
207	+	Integer.getInteger("jsr166.runsPerTest", 1);
208	+
209	+	/**
210	+	* The number of repetitions of the test suite (for finding leaks?).
211	+	*/
212	+	private static final int suiteRuns =
213	+	Integer.getInteger("jsr166.suiteRuns", 1);
214	+
215	+	/**
216	+	* Returns the value of the system property, or NaN if not defined.
217	+	*/
218	+	private static float systemPropertyValue(String name) {
219	+	String floatString = System.getProperty(name);
220	+	if (floatString == null)
221	+	return Float.NaN;
222	+	try {
223	+	return Float.parseFloat(floatString);
224	+	} catch (NumberFormatException ex) {
225	+	throw new IllegalArgumentException(
226	+	String.format("Bad float value in system property %s=%s",
227	+	name, floatString));
228	+	}
229	+	}
230	+
231	+	/**
232	+	* The scaling factor to apply to standard delays used in tests.
233	+	* May be initialized from any of:
234	+	* - the "jsr166.delay.factor" system property
235	+	* - the "test.timeout.factor" system property (as used by jtreg)
236	+	*   See: http://openjdk.java.net/jtreg/tag-spec.html
237	+	* - hard-coded fuzz factor when using a known slowpoke VM
238	+	*/
239	+	private static final float delayFactor = delayFactor();
240	+
241	+	private static float delayFactor() {
242	+	float x;
243	+	if (!Float.isNaN(x = systemPropertyValue("jsr166.delay.factor")))
244	+	return x;
245	+	if (!Float.isNaN(x = systemPropertyValue("test.timeout.factor")))
246	+	return x;
247	+	String prop = System.getProperty("java.vm.version");
248	+	if (prop != null && prop.matches(".*debug.*"))
249	+	return 4.0f; // How much slower is fastdebug than product?!
250	+	return 1.0f;
251	+	}
252	+
253	+	public JSR166TestCase() { super(); }
254	+	public JSR166TestCase(String name) { super(name); }
255	+
256	+	/**
257	+	* A filter for tests to run, matching strings of the form
258	+	* methodName(className), e.g. "testInvokeAll5(ForkJoinPoolTest)"
259	+	* Usefully combined with jsr166.runsPerTest.
260	+	*/
261	+	private static final Pattern methodFilter = methodFilter();
262	+
263	+	private static Pattern methodFilter() {
264	+	String regex = System.getProperty("jsr166.methodFilter");
265	+	return (regex == null) ? null : Pattern.compile(regex);
266	+	}
267	+
268	+	// Instrumentation to debug very rare, but very annoying hung test runs.
269	+	static volatile TestCase currentTestCase;
270	+	// static volatile int currentRun = 0;
271	+	static {
272	+	Runnable checkForWedgedTest = new Runnable() { public void run() {
273	+	// Avoid spurious reports with enormous runsPerTest.
274	+	// A single test case run should never take more than 1 second.
275	+	// But let's cap it at the high end too ...
276	+	final int timeoutMinutes =
277	+	Math.min(15, Math.max(runsPerTest / 60, 1));
278	+	for (TestCase lastTestCase = currentTestCase;;) {
279	+	try { MINUTES.sleep(timeoutMinutes); }
280	+	catch (InterruptedException unexpected) { break; }
281	+	if (lastTestCase == currentTestCase) {
282	+	System.err.printf(
283	+	"Looks like we're stuck running test: %s%n",
284	+	lastTestCase);
285	+	//                     System.err.printf(
286	+	//                         "Looks like we're stuck running test: %s (%d/%d)%n",
287	+	//                         lastTestCase, currentRun, runsPerTest);
288	+	//                     System.err.println("availableProcessors=" +
289	+	//                         Runtime.getRuntime().availableProcessors());
290	+	//                     System.err.printf("cpu model = %s%n", cpuModel());
291	+	dumpTestThreads();
292	+	// one stack dump is probably enough; more would be spam
293	+	break;
294	+	}
295	+	lastTestCase = currentTestCase;
296	+	}}};
297	+	Thread thread = new Thread(checkForWedgedTest, "checkForWedgedTest");
298	+	thread.setDaemon(true);
299	+	thread.start();
300	+	}
301	+
302	+	//     public static String cpuModel() {
303	+	//         try {
304	+	//             java.util.regex.Matcher matcher
305	+	//               = Pattern.compile("model name\\s*: (.*)")
306	+	//                 .matcher(new String(
307	+	//                     java.nio.file.Files.readAllBytes(
308	+	//                         java.nio.file.Paths.get("/proc/cpuinfo")), "UTF-8"));
309	+	//             matcher.find();
310	+	//             return matcher.group(1);
311	+	//         } catch (Exception ex) { return null; }
312	+	//     }
313	+
314	+	public void runBare() throws Throwable {
315	+	currentTestCase = this;
316	+	if (methodFilter == null
317	+	|| methodFilter.matcher(toString()).find())
318	+	super.runBare();
319	+	}
320	+
321		protected void runTest() throws Throwable {
322	<	if (profileTests)
323	<	runTestProfiled();
324	<	else
325	<	super.runTest();
322	>	for (int i = 0; i < runsPerTest; i++) {
323	>	// currentRun = i;
324	>	if (profileTests)
325	>	runTestProfiled();
326	>	else
327	>	super.runTest();
328	>	}
329		}
330
331		protected void runTestProfiled() throws Throwable {
332	<	long t0 = System.nanoTime();
333	<	try {
332	>	for (int i = 0; i < 2; i++) {
333	>	long startTime = System.nanoTime();
334		super.runTest();
335	<	} finally {
336	<	long elapsedMillis =
337	<	(System.nanoTime() - t0) / (1000L * 1000L);
338	<	if (elapsedMillis >= profileThreshold)
335	>	long elapsedMillis = millisElapsedSince(startTime);
336	>	if (elapsedMillis < profileThreshold)
337	>	break;
338	>	// Never report first run of any test; treat it as a
339	>	// warmup run, notably to trigger all needed classloading,
340	>	if (i > 0)
341		System.out.printf("%n%s: %d%n", toString(), elapsedMillis);
342		}
343		}
344	<
344	>
345		/**
346	<	* Runs all JSR166 unit tests using junit.textui.TestRunner
346	>	* Runs all JSR166 unit tests using junit.textui.TestRunner.
347		*/
348		public static void main(String[] args) {
349	+	main(suite(), args);
350	+	}
351	+
352	+	static class PithyResultPrinter extends junit.textui.ResultPrinter {
353	+	PithyResultPrinter(java.io.PrintStream writer) { super(writer); }
354	+	long runTime;
355	+	public void startTest(Test test) {}
356	+	protected void printHeader(long runTime) {
357	+	this.runTime = runTime; // defer printing for later
358	+	}
359	+	protected void printFooter(TestResult result) {
360	+	if (result.wasSuccessful()) {
361	+	getWriter().println("OK (" + result.runCount() + " tests)"
362	+	+ "  Time: " + elapsedTimeAsString(runTime));
363	+	} else {
364	+	getWriter().println("Time: " + elapsedTimeAsString(runTime));
365	+	super.printFooter(result);
366	+	}
367	+	}
368	+	}
369	+
370	+	/**
371	+	* Returns a TestRunner that doesn't bother with unnecessary
372	+	* fluff, like printing a "." for each test case.
373	+	*/
374	+	static junit.textui.TestRunner newPithyTestRunner() {
375	+	junit.textui.TestRunner runner = new junit.textui.TestRunner();
376	+	runner.setPrinter(new PithyResultPrinter(System.out));
377	+	return runner;
378	+	}
379	+
380	+	/**
381	+	* Runs all unit tests in the given test suite.
382	+	* Actual behavior influenced by jsr166.* system properties.
383	+	*/
384	+	static void main(Test suite, String[] args) {
385		if (useSecurityManager) {
386		System.err.println("Setting a permissive security manager");
387		Policy.setPolicy(permissivePolicy());
388		System.setSecurityManager(new SecurityManager());
389		}
390	<	int iters = (args.length == 0) ? 1 : Integer.parseInt(args[0]);
391	<
392	<	Test s = suite();
393	<	for (int i = 0; i < iters; ++i) {
148	<	junit.textui.TestRunner.run(s);
390	>	for (int i = 0; i < suiteRuns; i++) {
391	>	TestResult result = newPithyTestRunner().doRun(suite);
392	>	if (!result.wasSuccessful())
393	>	System.exit(1);
394		System.gc();
395		System.runFinalization();
396		}
152	–	System.exit(0);
397		}
398
399		public static TestSuite newTestSuite(Object... suiteOrClasses) {
#	Line 165 | Line 409 | public class JSR166TestCase extends Test
409		return suite;
410		}
411
412	+	public static void addNamedTestClasses(TestSuite suite,
413	+	String... testClassNames) {
414	+	for (String testClassName : testClassNames) {
415	+	try {
416	+	Class<?> testClass = Class.forName(testClassName);
417	+	Method m = testClass.getDeclaredMethod("suite",
418	+	new Class<?>[0]);
419	+	suite.addTest(newTestSuite((Test)m.invoke(null)));
420	+	} catch (Exception e) {
421	+	throw new Error("Missing test class", e);
422	+	}
423	+	}
424	+	}
425	+
426	+	public static final double JAVA_CLASS_VERSION;
427	+	public static final String JAVA_SPECIFICATION_VERSION;
428	+	static {
429	+	try {
430	+	JAVA_CLASS_VERSION = java.security.AccessController.doPrivileged(
431	+	new java.security.PrivilegedAction<Double>() {
432	+	public Double run() {
433	+	return Double.valueOf(System.getProperty("java.class.version"));}});
434	+	JAVA_SPECIFICATION_VERSION = java.security.AccessController.doPrivileged(
435	+	new java.security.PrivilegedAction<String>() {
436	+	public String run() {
437	+	return System.getProperty("java.specification.version");}});
438	+	} catch (Throwable t) {
439	+	throw new Error(t);
440	+	}
441	+	}
442	+
443	+	public static boolean atLeastJava6() { return JAVA_CLASS_VERSION >= 50.0; }
444	+	public static boolean atLeastJava7() { return JAVA_CLASS_VERSION >= 51.0; }
445	+	public static boolean atLeastJava8() { return JAVA_CLASS_VERSION >= 52.0; }
446	+	public static boolean atLeastJava9() {
447	+	return JAVA_CLASS_VERSION >= 53.0
448	+	// As of 2015-09, java9 still uses 52.0 class file version
449	+	|| JAVA_SPECIFICATION_VERSION.matches("^(1\\.)?(9|[0-9][0-9])$");
450	+	}
451	+	public static boolean atLeastJava10() {
452	+	return JAVA_CLASS_VERSION >= 54.0
453	+	|| JAVA_SPECIFICATION_VERSION.matches("^(1\\.)?[0-9][0-9]$");
454	+	}
455	+
456		/**
457		* Collects all JSR166 unit tests as one suite.
458		*/
459		public static Test suite() {
460	<	return newTestSuite(
460	>	// Java7+ test classes
461	>	TestSuite suite = newTestSuite(
462		ForkJoinPoolTest.suite(),
463		ForkJoinTaskTest.suite(),
464		RecursiveActionTest.suite(),
#	Line 183 | Line 472 | public class JSR166TestCase extends Test
472		AbstractQueuedLongSynchronizerTest.suite(),
473		ArrayBlockingQueueTest.suite(),
474		ArrayDequeTest.suite(),
475	+	ArrayListTest.suite(),
476		AtomicBooleanTest.suite(),
477		AtomicIntegerArrayTest.suite(),
478		AtomicIntegerFieldUpdaterTest.suite(),
#	Line 205 | Line 495 | public class JSR166TestCase extends Test
495		CopyOnWriteArrayListTest.suite(),
496		CopyOnWriteArraySetTest.suite(),
497		CountDownLatchTest.suite(),
498	+	CountedCompleterTest.suite(),
499		CyclicBarrierTest.suite(),
500		DelayQueueTest.suite(),
501		EntryTest.suite(),
#	Line 233 | Line 524 | public class JSR166TestCase extends Test
524		TreeMapTest.suite(),
525		TreeSetTest.suite(),
526		TreeSubMapTest.suite(),
527	<	TreeSubSetTest.suite());
527	>	TreeSubSetTest.suite(),
528	>	VectorTest.suite());
529	>
530	>	// Java8+ test classes
531	>	if (atLeastJava8()) {
532	>	String[] java8TestClassNames = {
533	>	"ArrayDeque8Test",
534	>	"Atomic8Test",
535	>	"CompletableFutureTest",
536	>	"ConcurrentHashMap8Test",
537	>	"CountedCompleter8Test",
538	>	"DoubleAccumulatorTest",
539	>	"DoubleAdderTest",
540	>	"ForkJoinPool8Test",
541	>	"ForkJoinTask8Test",
542	>	"LinkedBlockingDeque8Test",
543	>	"LinkedBlockingQueue8Test",
544	>	"LongAccumulatorTest",
545	>	"LongAdderTest",
546	>	"SplittableRandomTest",
547	>	"StampedLockTest",
548	>	"SubmissionPublisherTest",
549	>	"ThreadLocalRandom8Test",
550	>	"TimeUnit8Test",
551	>	};
552	>	addNamedTestClasses(suite, java8TestClassNames);
553	>	}
554	>
555	>	// Java9+ test classes
556	>	if (atLeastJava9()) {
557	>	String[] java9TestClassNames = {
558	>	"AtomicBoolean9Test",
559	>	"AtomicInteger9Test",
560	>	"AtomicIntegerArray9Test",
561	>	"AtomicLong9Test",
562	>	"AtomicLongArray9Test",
563	>	"AtomicReference9Test",
564	>	"AtomicReferenceArray9Test",
565	>	"ExecutorCompletionService9Test",
566	>	"ForkJoinPool9Test",
567	>	};
568	>	addNamedTestClasses(suite, java9TestClassNames);
569	>	}
570	>
571	>	return suite;
572		}
573
574	+	/** Returns list of junit-style test method names in given class. */
575	+	public static ArrayList<String> testMethodNames(Class<?> testClass) {
576	+	Method[] methods = testClass.getDeclaredMethods();
577	+	ArrayList<String> names = new ArrayList<>(methods.length);
578	+	for (Method method : methods) {
579	+	if (method.getName().startsWith("test")
580	+	&& Modifier.isPublic(method.getModifiers())
581	+	// method.getParameterCount() requires jdk8+
582	+	&& method.getParameterTypes().length == 0) {
583	+	names.add(method.getName());
584	+	}
585	+	}
586	+	return names;
587	+	}
588	+
589	+	/**
590	+	* Returns junit-style testSuite for the given test class, but
591	+	* parameterized by passing extra data to each test.
592	+	*/
593	+	public static <ExtraData> Test parameterizedTestSuite
594	+	(Class<? extends JSR166TestCase> testClass,
595	+	Class<ExtraData> dataClass,
596	+	ExtraData data) {
597	+	try {
598	+	TestSuite suite = new TestSuite();
599	+	Constructor c =
600	+	testClass.getDeclaredConstructor(dataClass, String.class);
601	+	for (String methodName : testMethodNames(testClass))
602	+	suite.addTest((Test) c.newInstance(data, methodName));
603	+	return suite;
604	+	} catch (Exception e) {
605	+	throw new Error(e);
606	+	}
607	+	}
608	+
609	+	/**
610	+	* Returns junit-style testSuite for the jdk8 extension of the
611	+	* given test class, but parameterized by passing extra data to
612	+	* each test.  Uses reflection to allow compilation in jdk7.
613	+	*/
614	+	public static <ExtraData> Test jdk8ParameterizedTestSuite
615	+	(Class<? extends JSR166TestCase> testClass,
616	+	Class<ExtraData> dataClass,
617	+	ExtraData data) {
618	+	if (atLeastJava8()) {
619	+	String name = testClass.getName();
620	+	String name8 = name.replaceAll("Test$", "8Test");
621	+	if (name.equals(name8)) throw new Error(name);
622	+	try {
623	+	return (Test)
624	+	Class.forName(name8)
625	+	.getMethod("testSuite", new Class[] { dataClass })
626	+	.invoke(null, data);
627	+	} catch (Exception e) {
628	+	throw new Error(e);
629	+	}
630	+	} else {
631	+	return new TestSuite();
632	+	}
633	+	}
634	+
635	+	// Delays for timing-dependent tests, in milliseconds.
636
637		public static long SHORT_DELAY_MS;
638		public static long SMALL_DELAY_MS;
639		public static long MEDIUM_DELAY_MS;
640		public static long LONG_DELAY_MS;
641
642	+	private static final long RANDOM_TIMEOUT;
643	+	private static final long RANDOM_EXPIRED_TIMEOUT;
644	+	private static final TimeUnit RANDOM_TIMEUNIT;
645	+	static {
646	+	ThreadLocalRandom rnd = ThreadLocalRandom.current();
647	+	long[] timeouts = { Long.MIN_VALUE, -1, 0, 1, Long.MAX_VALUE };
648	+	RANDOM_TIMEOUT = timeouts[rnd.nextInt(timeouts.length)];
649	+	RANDOM_EXPIRED_TIMEOUT = timeouts[rnd.nextInt(3)];
650	+	TimeUnit[] timeUnits = TimeUnit.values();
651	+	RANDOM_TIMEUNIT = timeUnits[rnd.nextInt(timeUnits.length)];
652	+	}
653	+
654	+	/**
655	+	* Returns a timeout for use when any value at all will do.
656	+	*/
657	+	static long randomTimeout() { return RANDOM_TIMEOUT; }
658
659		/**
660	<	* Returns the shortest timed delay. This could
661	<	* be reimplemented to use for example a Property.
660	>	* Returns a timeout that means "no waiting", i.e. not positive.
661	>	*/
662	>	static long randomExpiredTimeout() { return RANDOM_EXPIRED_TIMEOUT; }
663	>
664	>	/**
665	>	* Returns a random non-null TimeUnit.
666	>	*/
667	>	static TimeUnit randomTimeUnit() { return RANDOM_TIMEUNIT; }
668	>
669	>	/**
670	>	* Returns the shortest timed delay. This can be scaled up for
671	>	* slow machines using the jsr166.delay.factor system property,
672	>	* or via jtreg's -timeoutFactor: flag.
673	>	* http://openjdk.java.net/jtreg/command-help.html
674		*/
675		protected long getShortDelay() {
676	<	return 50;
676	>	return (long) (50 * delayFactor);
677		}
678
254	–
679		/**
680		* Sets delays as multiples of SHORT_DELAY.
681		*/
#	Line 259 | Line 683 | public class JSR166TestCase extends Test
683		SHORT_DELAY_MS = getShortDelay();
684		SMALL_DELAY_MS  = SHORT_DELAY_MS * 5;
685		MEDIUM_DELAY_MS = SHORT_DELAY_MS * 10;
686	<	LONG_DELAY_MS   = SHORT_DELAY_MS * 50;
686	>	LONG_DELAY_MS   = SHORT_DELAY_MS * 200;
687	>	}
688	>
689	>	private static final long TIMEOUT_DELAY_MS
690	>	= (long) (12.0 * Math.cbrt(delayFactor));
691	>
692	>	/**
693	>	* Returns a timeout in milliseconds to be used in tests that verify
694	>	* that operations block or time out.  We want this to be longer
695	>	* than the OS scheduling quantum, but not too long, so don't scale
696	>	* linearly with delayFactor; we use "crazy" cube root instead.
697	>	*/
698	>	static long timeoutMillis() {
699	>	return TIMEOUT_DELAY_MS;
700	>	}
701	>
702	>	/**
703	>	* Returns a new Date instance representing a time at least
704	>	* delayMillis milliseconds in the future.
705	>	*/
706	>	Date delayedDate(long delayMillis) {
707	>	// Add 1 because currentTimeMillis is known to round into the past.
708	>	return new Date(System.currentTimeMillis() + delayMillis + 1);
709		}
710
711		/**
712		* The first exception encountered if any threadAssertXXX method fails.
713		*/
714		private final AtomicReference<Throwable> threadFailure
715	<	= new AtomicReference<Throwable>(null);
715	>	= new AtomicReference<>(null);
716
717		/**
718		* Records an exception so that it can be rethrown later in the test
#	Line 275 | Line 721 | public class JSR166TestCase extends Test
721		* the same test have no effect.
722		*/
723		public void threadRecordFailure(Throwable t) {
724	+	System.err.println(t);
725	+	dumpTestThreads();
726		threadFailure.compareAndSet(null, t);
727		}
728
#	Line 282 | Line 730 | public class JSR166TestCase extends Test
730		setDelays();
731		}
732
733	+	void tearDownFail(String format, Object... args) {
734	+	String msg = toString() + ": " + String.format(format, args);
735	+	System.err.println(msg);
736	+	dumpTestThreads();
737	+	throw new AssertionFailedError(msg);
738	+	}
739	+
740		/**
741	+	* Extra checks that get done for all test cases.
742	+	*
743		* Triggers test case failure if any thread assertions have failed,
744		* by rethrowing, in the test harness thread, any exception recorded
745		* earlier by threadRecordFailure.
746	+	*
747	+	* Triggers test case failure if interrupt status is set in the main thread.
748		*/
749		public void tearDown() throws Exception {
750	<	Throwable t = threadFailure.get();
750	>	Throwable t = threadFailure.getAndSet(null);
751		if (t != null) {
752		if (t instanceof Error)
753		throw (Error) t;
#	Line 303 | Line 762 | public class JSR166TestCase extends Test
762		throw afe;
763		}
764		}
765	+
766	+	if (Thread.interrupted())
767	+	tearDownFail("interrupt status set in main thread");
768	+
769	+	checkForkJoinPoolThreadLeaks();
770	+	}
771	+
772	+	/**
773	+	* Finds missing PoolCleaners
774	+	*/
775	+	void checkForkJoinPoolThreadLeaks() throws InterruptedException {
776	+	Thread[] survivors = new Thread[7];
777	+	int count = Thread.enumerate(survivors);
778	+	for (int i = 0; i < count; i++) {
779	+	Thread thread = survivors[i];
780	+	String name = thread.getName();
781	+	if (name.startsWith("ForkJoinPool-")) {
782	+	// give thread some time to terminate
783	+	thread.join(LONG_DELAY_MS);
784	+	if (thread.isAlive())
785	+	tearDownFail("Found leaked ForkJoinPool thread thread=%s",
786	+	thread);
787	+	}
788	+	}
789	+
790	+	if (!ForkJoinPool.commonPool()
791	+	.awaitQuiescence(LONG_DELAY_MS, MILLISECONDS))
792	+	tearDownFail("ForkJoin common pool thread stuck");
793		}
794
795		/**
#	Line 315 | Line 802 | public class JSR166TestCase extends Test
802		fail(reason);
803		} catch (AssertionFailedError t) {
804		threadRecordFailure(t);
805	<	fail(reason);
805	>	throw t;
806		}
807		}
808
#	Line 383 | Line 870 | public class JSR166TestCase extends Test
870		public void threadAssertEquals(Object x, Object y) {
871		try {
872		assertEquals(x, y);
873	<	} catch (AssertionFailedError t) {
874	<	threadRecordFailure(t);
875	<	throw t;
876	<	} catch (Throwable t) {
877	<	threadUnexpectedException(t);
873	>	} catch (AssertionFailedError fail) {
874	>	threadRecordFailure(fail);
875	>	throw fail;
876	>	} catch (Throwable fail) {
877	>	threadUnexpectedException(fail);
878		}
879		}
880
#	Line 399 | Line 886 | public class JSR166TestCase extends Test
886		public void threadAssertSame(Object x, Object y) {
887		try {
888		assertSame(x, y);
889	<	} catch (AssertionFailedError t) {
890	<	threadRecordFailure(t);
891	<	throw t;
889	>	} catch (AssertionFailedError fail) {
890	>	threadRecordFailure(fail);
891	>	throw fail;
892		}
893		}
894
#	Line 434 | Line 921 | public class JSR166TestCase extends Test
921		else {
922		AssertionFailedError afe =
923		new AssertionFailedError("unexpected exception: " + t);
924	<	t.initCause(t);
924	>	afe.initCause(t);
925		throw afe;
926		}
927		}
928
929		/**
930	+	* Delays, via Thread.sleep, for the given millisecond delay, but
931	+	* if the sleep is shorter than specified, may re-sleep or yield
932	+	* until time elapses.  Ensures that the given time, as measured
933	+	* by System.nanoTime(), has elapsed.
934	+	*/
935	+	static void delay(long millis) throws InterruptedException {
936	+	long nanos = millis * (1000 * 1000);
937	+	final long wakeupTime = System.nanoTime() + nanos;
938	+	do {
939	+	if (millis > 0L)
940	+	Thread.sleep(millis);
941	+	else // too short to sleep
942	+	Thread.yield();
943	+	nanos = wakeupTime - System.nanoTime();
944	+	millis = nanos / (1000 * 1000);
945	+	} while (nanos >= 0L);
946	+	}
947	+
948	+	/**
949	+	* Allows use of try-with-resources with per-test thread pools.
950	+	*/
951	+	class PoolCleaner implements AutoCloseable {
952	+	private final ExecutorService pool;
953	+	public PoolCleaner(ExecutorService pool) { this.pool = pool; }
954	+	public void close() { joinPool(pool); }
955	+	}
956	+
957	+	/**
958	+	* An extension of PoolCleaner that has an action to release the pool.
959	+	*/
960	+	class PoolCleanerWithReleaser extends PoolCleaner {
961	+	private final Runnable releaser;
962	+	public PoolCleanerWithReleaser(ExecutorService pool, Runnable releaser) {
963	+	super(pool);
964	+	this.releaser = releaser;
965	+	}
966	+	public void close() {
967	+	try {
968	+	releaser.run();
969	+	} finally {
970	+	super.close();
971	+	}
972	+	}
973	+	}
974	+
975	+	PoolCleaner cleaner(ExecutorService pool) {
976	+	return new PoolCleaner(pool);
977	+	}
978	+
979	+	PoolCleaner cleaner(ExecutorService pool, Runnable releaser) {
980	+	return new PoolCleanerWithReleaser(pool, releaser);
981	+	}
982	+
983	+	PoolCleaner cleaner(ExecutorService pool, CountDownLatch latch) {
984	+	return new PoolCleanerWithReleaser(pool, releaser(latch));
985	+	}
986	+
987	+	Runnable releaser(final CountDownLatch latch) {
988	+	return new Runnable() { public void run() {
989	+	do { latch.countDown(); }
990	+	while (latch.getCount() > 0);
991	+	}};
992	+	}
993	+
994	+	PoolCleaner cleaner(ExecutorService pool, AtomicBoolean flag) {
995	+	return new PoolCleanerWithReleaser(pool, releaser(flag));
996	+	}
997	+
998	+	Runnable releaser(final AtomicBoolean flag) {
999	+	return new Runnable() { public void run() { flag.set(true); }};
1000	+	}
1001	+
1002	+	/**
1003		* Waits out termination of a thread pool or fails doing so.
1004		*/
1005	<	public void joinPool(ExecutorService exec) {
1005	>	void joinPool(ExecutorService pool) {
1006		try {
1007	<	exec.shutdown();
1008	<	assertTrue("ExecutorService did not terminate in a timely manner",
1009	<	exec.awaitTermination(LONG_DELAY_MS, MILLISECONDS));
1007	>	pool.shutdown();
1008	>	if (!pool.awaitTermination(2 * LONG_DELAY_MS, MILLISECONDS)) {
1009	>	try {
1010	>	threadFail("ExecutorService " + pool +
1011	>	" did not terminate in a timely manner");
1012	>	} finally {
1013	>	// last resort, for the benefit of subsequent tests
1014	>	pool.shutdownNow();
1015	>	pool.awaitTermination(MEDIUM_DELAY_MS, MILLISECONDS);
1016	>	}
1017	>	}
1018		} catch (SecurityException ok) {
1019		// Allowed in case test doesn't have privs
1020	<	} catch (InterruptedException ie) {
1021	<	fail("Unexpected InterruptedException");
1020	>	} catch (InterruptedException fail) {
1021	>	threadFail("Unexpected InterruptedException");
1022	>	}
1023	>	}
1024	>
1025	>	/**
1026	>	* Like Runnable, but with the freedom to throw anything.
1027	>	* junit folks had the same idea:
1028	>	* http://junit.org/junit5/docs/snapshot/api/org/junit/gen5/api/Executable.html
1029	>	*/
1030	>	interface Action { public void run() throws Throwable; }
1031	>
1032	>	/**
1033	>	* Runs all the given actions in parallel, failing if any fail.
1034	>	* Useful for running multiple variants of tests that are
1035	>	* necessarily individually slow because they must block.
1036	>	*/
1037	>	void testInParallel(Action ... actions) {
1038	>	ExecutorService pool = Executors.newCachedThreadPool();
1039	>	try (PoolCleaner cleaner = cleaner(pool)) {
1040	>	ArrayList<Future<?>> futures = new ArrayList<>(actions.length);
1041	>	for (final Action action : actions)
1042	>	futures.add(pool.submit(new CheckedRunnable() {
1043	>	public void realRun() throws Throwable { action.run();}}));
1044	>	for (Future<?> future : futures)
1045	>	try {
1046	>	assertNull(future.get(LONG_DELAY_MS, MILLISECONDS));
1047	>	} catch (ExecutionException ex) {
1048	>	threadUnexpectedException(ex.getCause());
1049	>	} catch (Exception ex) {
1050	>	threadUnexpectedException(ex);
1051	>	}
1052	>	}
1053	>	}
1054	>
1055	>	/**
1056	>	* A debugging tool to print stack traces of most threads, as jstack does.
1057	>	* Uninteresting threads are filtered out.
1058	>	*/
1059	>	static void dumpTestThreads() {
1060	>	SecurityManager sm = System.getSecurityManager();
1061	>	if (sm != null) {
1062	>	try {
1063	>	System.setSecurityManager(null);
1064	>	} catch (SecurityException giveUp) {
1065	>	return;
1066	>	}
1067	>	}
1068	>
1069	>	ThreadMXBean threadMXBean = ManagementFactory.getThreadMXBean();
1070	>	System.err.println("------ stacktrace dump start ------");
1071	>	for (ThreadInfo info : threadMXBean.dumpAllThreads(true, true)) {
1072	>	final String name = info.getThreadName();
1073	>	String lockName;
1074	>	if ("Signal Dispatcher".equals(name))
1075	>	continue;
1076	>	if ("Reference Handler".equals(name)
1077	>	&& (lockName = info.getLockName()) != null
1078	>	&& lockName.startsWith("java.lang.ref.Reference$Lock"))
1079	>	continue;
1080	>	if ("Finalizer".equals(name)
1081	>	&& (lockName = info.getLockName()) != null
1082	>	&& lockName.startsWith("java.lang.ref.ReferenceQueue$Lock"))
1083	>	continue;
1084	>	if ("checkForWedgedTest".equals(name))
1085	>	continue;
1086	>	System.err.print(info);
1087	>	}
1088	>	System.err.println("------ stacktrace dump end ------");
1089	>
1090	>	if (sm != null) System.setSecurityManager(sm);
1091	>	}
1092	>
1093	>	/**
1094	>	* Checks that thread eventually enters the expected blocked thread state.
1095	>	*/
1096	>	void assertThreadBlocks(Thread thread, Thread.State expected) {
1097	>	// always sleep at least 1 ms, with high probability avoiding
1098	>	// transitory states
1099	>	for (long retries = LONG_DELAY_MS * 3 / 4; retries-->0; ) {
1100	>	try { delay(1); }
1101	>	catch (InterruptedException fail) {
1102	>	fail("Unexpected InterruptedException");
1103	>	}
1104	>	Thread.State s = thread.getState();
1105	>	if (s == expected)
1106	>	return;
1107	>	else if (s == Thread.State.TERMINATED)
1108	>	fail("Unexpected thread termination");
1109	>	}
1110	>	fail("timed out waiting for thread to enter thread state " + expected);
1111	>	}
1112	>
1113	>	/**
1114	>	* Checks that thread does not terminate within the default
1115	>	* millisecond delay of {@code timeoutMillis()}.
1116	>	* TODO: REMOVEME
1117	>	*/
1118	>	void assertThreadStaysAlive(Thread thread) {
1119	>	assertThreadStaysAlive(thread, timeoutMillis());
1120	>	}
1121	>
1122	>	/**
1123	>	* Checks that thread does not terminate within the given millisecond delay.
1124	>	* TODO: REMOVEME
1125	>	*/
1126	>	void assertThreadStaysAlive(Thread thread, long millis) {
1127	>	try {
1128	>	// No need to optimize the failing case via Thread.join.
1129	>	delay(millis);
1130	>	assertTrue(thread.isAlive());
1131	>	} catch (InterruptedException fail) {
1132	>	threadFail("Unexpected InterruptedException");
1133	>	}
1134	>	}
1135	>
1136	>	/**
1137	>	* Checks that the threads do not terminate within the default
1138	>	* millisecond delay of {@code timeoutMillis()}.
1139	>	* TODO: REMOVEME
1140	>	*/
1141	>	void assertThreadsStayAlive(Thread... threads) {
1142	>	assertThreadsStayAlive(timeoutMillis(), threads);
1143	>	}
1144	>
1145	>	/**
1146	>	* Checks that the threads do not terminate within the given millisecond delay.
1147	>	* TODO: REMOVEME
1148	>	*/
1149	>	void assertThreadsStayAlive(long millis, Thread... threads) {
1150	>	try {
1151	>	// No need to optimize the failing case via Thread.join.
1152	>	delay(millis);
1153	>	for (Thread thread : threads)
1154	>	assertTrue(thread.isAlive());
1155	>	} catch (InterruptedException fail) {
1156	>	threadFail("Unexpected InterruptedException");
1157		}
1158		}
1159
1160	+	/**
1161	+	* Checks that future.get times out, with the default timeout of
1162	+	* {@code timeoutMillis()}.
1163	+	*/
1164	+	void assertFutureTimesOut(Future future) {
1165	+	assertFutureTimesOut(future, timeoutMillis());
1166	+	}
1167	+
1168	+	/**
1169	+	* Checks that future.get times out, with the given millisecond timeout.
1170	+	*/
1171	+	void assertFutureTimesOut(Future future, long timeoutMillis) {
1172	+	long startTime = System.nanoTime();
1173	+	try {
1174	+	future.get(timeoutMillis, MILLISECONDS);
1175	+	shouldThrow();
1176	+	} catch (TimeoutException success) {
1177	+	} catch (Exception fail) {
1178	+	threadUnexpectedException(fail);
1179	+	} finally { future.cancel(true); }
1180	+	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
1181	+	}
1182
1183		/**
1184		* Fails with message "should throw exception".
#	Line 470 | Line 1195 | public class JSR166TestCase extends Test
1195		}
1196
1197		/**
1198	+	* The maximum number of consecutive spurious wakeups we should
1199	+	* tolerate (from APIs like LockSupport.park) before failing a test.
1200	+	*/
1201	+	static final int MAX_SPURIOUS_WAKEUPS = 10;
1202	+
1203	+	/**
1204		* The number of elements to place in collections, arrays, etc.
1205		*/
1206		public static final int SIZE = 20;
#	Line 494 | Line 1225 | public class JSR166TestCase extends Test
1225		public static final Integer m6  = new Integer(-6);
1226		public static final Integer m10 = new Integer(-10);
1227
497	–
1228		/**
1229		* Runs Runnable r with a security policy that permits precisely
1230		* the specified permissions.  If there is no current security
#	Line 506 | Line 1236 | public class JSR166TestCase extends Test
1236		SecurityManager sm = System.getSecurityManager();
1237		if (sm == null) {
1238		r.run();
1239	+	}
1240	+	runWithSecurityManagerWithPermissions(r, permissions);
1241	+	}
1242	+
1243	+	/**
1244	+	* Runs Runnable r with a security policy that permits precisely
1245	+	* the specified permissions.  If there is no current security
1246	+	* manager, a temporary one is set for the duration of the
1247	+	* Runnable.  We require that any security manager permit
1248	+	* getPolicy/setPolicy.
1249	+	*/
1250	+	public void runWithSecurityManagerWithPermissions(Runnable r,
1251	+	Permission... permissions) {
1252	+	SecurityManager sm = System.getSecurityManager();
1253	+	if (sm == null) {
1254		Policy savedPolicy = Policy.getPolicy();
1255		try {
1256		Policy.setPolicy(permissivePolicy());
1257		System.setSecurityManager(new SecurityManager());
1258	<	runWithPermissions(r, permissions);
1258	>	runWithSecurityManagerWithPermissions(r, permissions);
1259		} finally {
1260		System.setSecurityManager(null);
1261		Policy.setPolicy(savedPolicy);
#	Line 558 | Line 1303 | public class JSR166TestCase extends Test
1303		return perms.implies(p);
1304		}
1305		public void refresh() {}
1306	+	public String toString() {
1307	+	List<Permission> ps = new ArrayList<>();
1308	+	for (Enumeration<Permission> e = perms.elements(); e.hasMoreElements();)
1309	+	ps.add(e.nextElement());
1310	+	return "AdjustablePolicy with permissions " + ps;
1311	+	}
1312		}
1313
1314		/**
#	Line 583 | Line 1334 | public class JSR166TestCase extends Test
1334		* Sleeps until the given time has elapsed.
1335		* Throws AssertionFailedError if interrupted.
1336		*/
1337	<	void sleep(long millis) {
1337	>	static void sleep(long millis) {
1338		try {
1339	<	Thread.sleep(millis);
1340	<	} catch (InterruptedException ie) {
1339	>	delay(millis);
1340	>	} catch (InterruptedException fail) {
1341		AssertionFailedError afe =
1342		new AssertionFailedError("Unexpected InterruptedException");
1343	<	afe.initCause(ie);
1343	>	afe.initCause(fail);
1344		throw afe;
1345		}
1346		}
1347
1348		/**
1349	<	* Sleeps until the timeout has elapsed, or interrupted.
1350	<	* Does <em>NOT</em> throw InterruptedException.
1349	>	* Spin-waits up to the specified number of milliseconds for the given
1350	>	* thread to enter a wait state: BLOCKED, WAITING, or TIMED_WAITING.
1351	>	*/
1352	>	void waitForThreadToEnterWaitState(Thread thread, long timeoutMillis) {
1353	>	long startTime = 0L;
1354	>	for (;;) {
1355	>	Thread.State s = thread.getState();
1356	>	if (s == Thread.State.BLOCKED ||
1357	>	s == Thread.State.WAITING ||
1358	>	s == Thread.State.TIMED_WAITING)
1359	>	return;
1360	>	else if (s == Thread.State.TERMINATED)
1361	>	fail("Unexpected thread termination");
1362	>	else if (startTime == 0L)
1363	>	startTime = System.nanoTime();
1364	>	else if (millisElapsedSince(startTime) > timeoutMillis) {
1365	>	threadAssertTrue(thread.isAlive());
1366	>	fail("timed out waiting for thread to enter wait state");
1367	>	}
1368	>	Thread.yield();
1369	>	}
1370	>	}
1371	>
1372	>	/**
1373	>	* Spin-waits up to the specified number of milliseconds for the given
1374	>	* thread to enter a wait state: BLOCKED, WAITING, or TIMED_WAITING,
1375	>	* and additionally satisfy the given condition.
1376	>	*/
1377	>	void waitForThreadToEnterWaitState(
1378	>	Thread thread, long timeoutMillis, Callable<Boolean> waitingForGodot) {
1379	>	long startTime = 0L;
1380	>	for (;;) {
1381	>	Thread.State s = thread.getState();
1382	>	if (s == Thread.State.BLOCKED ||
1383	>	s == Thread.State.WAITING ||
1384	>	s == Thread.State.TIMED_WAITING) {
1385	>	try {
1386	>	if (waitingForGodot.call())
1387	>	return;
1388	>	} catch (Throwable fail) { threadUnexpectedException(fail); }
1389	>	}
1390	>	else if (s == Thread.State.TERMINATED)
1391	>	fail("Unexpected thread termination");
1392	>	else if (startTime == 0L)
1393	>	startTime = System.nanoTime();
1394	>	else if (millisElapsedSince(startTime) > timeoutMillis) {
1395	>	threadAssertTrue(thread.isAlive());
1396	>	fail("timed out waiting for thread to enter wait state");
1397	>	}
1398	>	Thread.yield();
1399	>	}
1400	>	}
1401	>
1402	>	/**
1403	>	* Spin-waits up to LONG_DELAY_MS milliseconds for the given thread to
1404	>	* enter a wait state: BLOCKED, WAITING, or TIMED_WAITING.
1405	>	*/
1406	>	void waitForThreadToEnterWaitState(Thread thread) {
1407	>	waitForThreadToEnterWaitState(thread, LONG_DELAY_MS);
1408	>	}
1409	>
1410	>	/**
1411	>	* Spin-waits up to LONG_DELAY_MS milliseconds for the given thread to
1412	>	* enter a wait state: BLOCKED, WAITING, or TIMED_WAITING,
1413	>	* and additionally satisfy the given condition.
1414	>	*/
1415	>	void waitForThreadToEnterWaitState(
1416	>	Thread thread, Callable<Boolean> waitingForGodot) {
1417	>	waitForThreadToEnterWaitState(thread, LONG_DELAY_MS, waitingForGodot);
1418	>	}
1419	>
1420	>	/**
1421	>	* Returns the number of milliseconds since time given by
1422	>	* startNanoTime, which must have been previously returned from a
1423	>	* call to {@link System#nanoTime()}.
1424	>	*/
1425	>	static long millisElapsedSince(long startNanoTime) {
1426	>	return NANOSECONDS.toMillis(System.nanoTime() - startNanoTime);
1427	>	}
1428	>
1429	>	//     void assertTerminatesPromptly(long timeoutMillis, Runnable r) {
1430	>	//         long startTime = System.nanoTime();
1431	>	//         try {
1432	>	//             r.run();
1433	>	//         } catch (Throwable fail) { threadUnexpectedException(fail); }
1434	>	//         if (millisElapsedSince(startTime) > timeoutMillis/2)
1435	>	//             throw new AssertionFailedError("did not return promptly");
1436	>	//     }
1437	>
1438	>	//     void assertTerminatesPromptly(Runnable r) {
1439	>	//         assertTerminatesPromptly(LONG_DELAY_MS/2, r);
1440	>	//     }
1441	>
1442	>	/**
1443	>	* Checks that timed f.get() returns the expected value, and does not
1444	>	* wait for the timeout to elapse before returning.
1445		*/
1446	<	void sleepTillInterrupted(long timeoutMillis) {
1446	>	<T> void checkTimedGet(Future<T> f, T expectedValue, long timeoutMillis) {
1447	>	long startTime = System.nanoTime();
1448		try {
1449	<	Thread.sleep(timeoutMillis);
1450	<	} catch (InterruptedException wakeup) {}
1449	>	assertEquals(expectedValue, f.get(timeoutMillis, MILLISECONDS));
1450	>	} catch (Throwable fail) { threadUnexpectedException(fail); }
1451	>	if (millisElapsedSince(startTime) > timeoutMillis/2)
1452	>	throw new AssertionFailedError("timed get did not return promptly");
1453	>	}
1454	>
1455	>	<T> void checkTimedGet(Future<T> f, T expectedValue) {
1456	>	checkTimedGet(f, expectedValue, LONG_DELAY_MS);
1457		}
1458
1459		/**
#	Line 622 | Line 1474 | public class JSR166TestCase extends Test
1474		void awaitTermination(Thread t, long timeoutMillis) {
1475		try {
1476		t.join(timeoutMillis);
1477	<	} catch (InterruptedException ie) {
1478	<	threadUnexpectedException(ie);
1477	>	} catch (InterruptedException fail) {
1478	>	threadUnexpectedException(fail);
1479		} finally {
1480	<	if (t.isAlive()) {
1480	>	if (t.getState() != Thread.State.TERMINATED) {
1481		t.interrupt();
1482	<	fail("Test timed out");
1482	>	threadFail("timed out waiting for thread to terminate");
1483		}
1484		}
1485		}
1486
1487	+	/**
1488	+	* Waits for LONG_DELAY_MS milliseconds for the thread to
1489	+	* terminate (using {@link Thread#join(long)}), else interrupts
1490	+	* the thread (in the hope that it may terminate later) and fails.
1491	+	*/
1492	+	void awaitTermination(Thread t) {
1493	+	awaitTermination(t, LONG_DELAY_MS);
1494	+	}
1495	+
1496		// Some convenient Runnable classes
1497
1498		public abstract class CheckedRunnable implements Runnable {
#	Line 640 | Line 1501 | public class JSR166TestCase extends Test
1501		public final void run() {
1502		try {
1503		realRun();
1504	<	} catch (Throwable t) {
1505	<	threadUnexpectedException(t);
1504	>	} catch (Throwable fail) {
1505	>	threadUnexpectedException(fail);
1506		}
1507		}
1508		}
#	Line 694 | Line 1555 | public class JSR166TestCase extends Test
1555		realRun();
1556		threadShouldThrow("InterruptedException");
1557		} catch (InterruptedException success) {
1558	<	} catch (Throwable t) {
1559	<	threadUnexpectedException(t);
1558	>	threadAssertFalse(Thread.interrupted());
1559	>	} catch (Throwable fail) {
1560	>	threadUnexpectedException(fail);
1561		}
1562		}
1563		}
#	Line 706 | Line 1568 | public class JSR166TestCase extends Test
1568		public final T call() {
1569		try {
1570		return realCall();
1571	<	} catch (Throwable t) {
1572	<	threadUnexpectedException(t);
1571	>	} catch (Throwable fail) {
1572	>	threadUnexpectedException(fail);
1573		return null;
1574		}
1575		}
#	Line 723 | Line 1585 | public class JSR166TestCase extends Test
1585		threadShouldThrow("InterruptedException");
1586		return result;
1587		} catch (InterruptedException success) {
1588	<	} catch (Throwable t) {
1589	<	threadUnexpectedException(t);
1588	>	threadAssertFalse(Thread.interrupted());
1589	>	} catch (Throwable fail) {
1590	>	threadUnexpectedException(fail);
1591		}
1592		return null;
1593		}
#	Line 741 | Line 1604 | public class JSR166TestCase extends Test
1604		public static final String TEST_STRING = "a test string";
1605
1606		public static class StringTask implements Callable<String> {
1607	<	public String call() { return TEST_STRING; }
1607	>	final String value;
1608	>	public StringTask() { this(TEST_STRING); }
1609	>	public StringTask(String value) { this.value = value; }
1610	>	public String call() { return value; }
1611		}
1612
1613		public Callable<String> latchAwaitingStringTask(final CountDownLatch latch) {
1614		return new CheckedCallable<String>() {
1615	<	public String realCall() {
1615	>	protected String realCall() {
1616		try {
1617		latch.await();
1618		} catch (InterruptedException quittingTime) {}
#	Line 754 | Line 1620 | public class JSR166TestCase extends Test
1620		}};
1621		}
1622
1623	<	public static class NPETask implements Callable<String> {
1624	<	public String call() { throw new NullPointerException(); }
1625	<	}
1626	<
1627	<	public static class CallableOne implements Callable<Integer> {
762	<	public Integer call() { return one; }
1623	>	public Runnable countDowner(final CountDownLatch latch) {
1624	>	return new CheckedRunnable() {
1625	>	public void realRun() throws InterruptedException {
1626	>	latch.countDown();
1627	>	}};
1628		}
1629
1630	<	public class ShortRunnable extends CheckedRunnable {
1631	<	protected void realRun() throws Throwable {
1632	<	Thread.sleep(SHORT_DELAY_MS);
1630	>	class LatchAwaiter extends CheckedRunnable {
1631	>	static final int NEW = 0;
1632	>	static final int RUNNING = 1;
1633	>	static final int DONE = 2;
1634	>	final CountDownLatch latch;
1635	>	int state = NEW;
1636	>	LatchAwaiter(CountDownLatch latch) { this.latch = latch; }
1637	>	public void realRun() throws InterruptedException {
1638	>	state = 1;
1639	>	await(latch);
1640	>	state = 2;
1641		}
1642		}
1643
1644	<	public class ShortInterruptedRunnable extends CheckedInterruptedRunnable {
1645	<	protected void realRun() throws InterruptedException {
773	<	Thread.sleep(SHORT_DELAY_MS);
774	<	}
1644	>	public LatchAwaiter awaiter(CountDownLatch latch) {
1645	>	return new LatchAwaiter(latch);
1646		}
1647
1648	<	public class SmallRunnable extends CheckedRunnable {
1649	<	protected void realRun() throws Throwable {
1650	<	Thread.sleep(SMALL_DELAY_MS);
1648	>	public void await(CountDownLatch latch, long timeoutMillis) {
1649	>	try {
1650	>	if (!latch.await(timeoutMillis, MILLISECONDS))
1651	>	fail("timed out waiting for CountDownLatch for "
1652	>	+ (timeoutMillis/1000) + " sec");
1653	>	} catch (Throwable fail) {
1654	>	threadUnexpectedException(fail);
1655		}
1656		}
1657
1658	<	public class SmallPossiblyInterruptedRunnable extends CheckedRunnable {
1659	<	protected void realRun() {
785	<	try {
786	<	Thread.sleep(SMALL_DELAY_MS);
787	<	} catch (InterruptedException ok) {}
788	<	}
1658	>	public void await(CountDownLatch latch) {
1659	>	await(latch, LONG_DELAY_MS);
1660		}
1661
1662	<	public class SmallCallable extends CheckedCallable {
1663	<	protected Object realCall() throws InterruptedException {
1664	<	Thread.sleep(SMALL_DELAY_MS);
1665	<	return Boolean.TRUE;
1662	>	public void await(Semaphore semaphore) {
1663	>	try {
1664	>	if (!semaphore.tryAcquire(LONG_DELAY_MS, MILLISECONDS))
1665	>	fail("timed out waiting for Semaphore for "
1666	>	+ (LONG_DELAY_MS/1000) + " sec");
1667	>	} catch (Throwable fail) {
1668	>	threadUnexpectedException(fail);
1669		}
1670		}
1671
1672	<	public class MediumRunnable extends CheckedRunnable {
1673	<	protected void realRun() throws Throwable {
1674	<	Thread.sleep(MEDIUM_DELAY_MS);
1672	>	public void await(CyclicBarrier barrier) {
1673	>	try {
1674	>	barrier.await(LONG_DELAY_MS, MILLISECONDS);
1675	>	} catch (Throwable fail) {
1676	>	threadUnexpectedException(fail);
1677		}
1678		}
1679
1680	<	public class MediumInterruptedRunnable extends CheckedInterruptedRunnable {
1681	<	protected void realRun() throws InterruptedException {
1682	<	Thread.sleep(MEDIUM_DELAY_MS);
1683	<	}
1680	>	//     /**
1681	>	//      * Spin-waits up to LONG_DELAY_MS until flag becomes true.
1682	>	//      */
1683	>	//     public void await(AtomicBoolean flag) {
1684	>	//         await(flag, LONG_DELAY_MS);
1685	>	//     }
1686	>
1687	>	//     /**
1688	>	//      * Spin-waits up to the specified timeout until flag becomes true.
1689	>	//      */
1690	>	//     public void await(AtomicBoolean flag, long timeoutMillis) {
1691	>	//         long startTime = System.nanoTime();
1692	>	//         while (!flag.get()) {
1693	>	//             if (millisElapsedSince(startTime) > timeoutMillis)
1694	>	//                 throw new AssertionFailedError("timed out");
1695	>	//             Thread.yield();
1696	>	//         }
1697	>	//     }
1698	>
1699	>	public static class NPETask implements Callable<String> {
1700	>	public String call() { throw new NullPointerException(); }
1701		}
1702
1703	<	public class MediumPossiblyInterruptedRunnable extends CheckedRunnable {
1703	>	public class SmallPossiblyInterruptedRunnable extends CheckedRunnable {
1704		protected void realRun() {
1705		try {
1706	<	Thread.sleep(MEDIUM_DELAY_MS);
1706	>	delay(SMALL_DELAY_MS);
1707		} catch (InterruptedException ok) {}
1708		}
1709		}
1710
1711	<	public class LongPossiblyInterruptedRunnable extends CheckedRunnable {
1712	<	protected void realRun() {
1713	<	try {
1714	<	Thread.sleep(LONG_DELAY_MS);
1715	<	} catch (InterruptedException ok) {}
1716	<	}
1711	>	public Runnable possiblyInterruptedRunnable(final long timeoutMillis) {
1712	>	return new CheckedRunnable() {
1713	>	protected void realRun() {
1714	>	try {
1715	>	delay(timeoutMillis);
1716	>	} catch (InterruptedException ok) {}
1717	>	}};
1718		}
1719
1720		/**
#	Line 836 | Line 1730 | public class JSR166TestCase extends Test
1730		boolean isDone();
1731		}
1732
839	–	public static TrackedRunnable trackedRunnable(final long timeoutMillis) {
840	–	return new TrackedRunnable() {
841	–	private volatile boolean done = false;
842	–	public boolean isDone() { return done; }
843	–	public void run() {
844	–	try {
845	–	Thread.sleep(timeoutMillis);
846	–	done = true;
847	–	} catch (InterruptedException ok) {}
848	–	}
849	–	};
850	–	}
851	–
852	–	public static class TrackedShortRunnable implements Runnable {
853	–	public volatile boolean done = false;
854	–	public void run() {
855	–	try {
856	–	Thread.sleep(SHORT_DELAY_MS);
857	–	done = true;
858	–	} catch (InterruptedException ok) {}
859	–	}
860	–	}
861	–
862	–	public static class TrackedSmallRunnable implements Runnable {
863	–	public volatile boolean done = false;
864	–	public void run() {
865	–	try {
866	–	Thread.sleep(SMALL_DELAY_MS);
867	–	done = true;
868	–	} catch (InterruptedException ok) {}
869	–	}
870	–	}
871	–
872	–	public static class TrackedMediumRunnable implements Runnable {
873	–	public volatile boolean done = false;
874	–	public void run() {
875	–	try {
876	–	Thread.sleep(MEDIUM_DELAY_MS);
877	–	done = true;
878	–	} catch (InterruptedException ok) {}
879	–	}
880	–	}
881	–
882	–	public static class TrackedLongRunnable implements Runnable {
883	–	public volatile boolean done = false;
884	–	public void run() {
885	–	try {
886	–	Thread.sleep(LONG_DELAY_MS);
887	–	done = true;
888	–	} catch (InterruptedException ok) {}
889	–	}
890	–	}
891	–
1733		public static class TrackedNoOpRunnable implements Runnable {
1734		public volatile boolean done = false;
1735		public void run() {
#	Line 896 | Line 1737 | public class JSR166TestCase extends Test
1737		}
1738		}
1739
899	–	public static class TrackedCallable implements Callable {
900	–	public volatile boolean done = false;
901	–	public Object call() {
902	–	try {
903	–	Thread.sleep(SMALL_DELAY_MS);
904	–	done = true;
905	–	} catch (InterruptedException ok) {}
906	–	return Boolean.TRUE;
907	–	}
908	–	}
909	–
1740		/**
1741		* Analog of CheckedRunnable for RecursiveAction
1742		*/
1743		public abstract class CheckedRecursiveAction extends RecursiveAction {
1744		protected abstract void realCompute() throws Throwable;
1745
1746	<	public final void compute() {
1746	>	@Override protected final void compute() {
1747		try {
1748		realCompute();
1749	<	} catch (Throwable t) {
1750	<	threadUnexpectedException(t);
1749	>	} catch (Throwable fail) {
1750	>	threadUnexpectedException(fail);
1751		}
1752		}
1753		}
#	Line 928 | Line 1758 | public class JSR166TestCase extends Test
1758		public abstract class CheckedRecursiveTask<T> extends RecursiveTask<T> {
1759		protected abstract T realCompute() throws Throwable;
1760
1761	<	public final T compute() {
1761	>	@Override protected final T compute() {
1762		try {
1763		return realCompute();
1764	<	} catch (Throwable t) {
1765	<	threadUnexpectedException(t);
1764	>	} catch (Throwable fail) {
1765	>	threadUnexpectedException(fail);
1766		return null;
1767		}
1768		}
#	Line 947 | Line 1777 | public class JSR166TestCase extends Test
1777		}
1778
1779		/**
1780	<	* A CyclicBarrier that fails with AssertionFailedErrors instead
1781	<	* of throwing checked exceptions.
1780	>	* A CyclicBarrier that uses timed await and fails with
1781	>	* AssertionFailedErrors instead of throwing checked exceptions.
1782		*/
1783	<	public class CheckedBarrier extends CyclicBarrier {
1783	>	public static class CheckedBarrier extends CyclicBarrier {
1784		public CheckedBarrier(int parties) { super(parties); }
1785
1786		public int await() {
1787		try {
1788	<	return super.await();
1789	<	} catch (Exception e) {
1788	>	return super.await(2 * LONG_DELAY_MS, MILLISECONDS);
1789	>	} catch (TimeoutException timedOut) {
1790	>	throw new AssertionFailedError("timed out");
1791	>	} catch (Exception fail) {
1792		AssertionFailedError afe =
1793	<	new AssertionFailedError("Unexpected exception: " + e);
1794	<	afe.initCause(e);
1793	>	new AssertionFailedError("Unexpected exception: " + fail);
1794	>	afe.initCause(fail);
1795		throw afe;
1796		}
1797		}
1798		}
1799
1800	+	void checkEmpty(BlockingQueue q) {
1801	+	try {
1802	+	assertTrue(q.isEmpty());
1803	+	assertEquals(0, q.size());
1804	+	assertNull(q.peek());
1805	+	assertNull(q.poll());
1806	+	assertNull(q.poll(randomExpiredTimeout(), randomTimeUnit()));
1807	+	assertEquals(q.toString(), "[]");
1808	+	assertTrue(Arrays.equals(q.toArray(), new Object[0]));
1809	+	assertFalse(q.iterator().hasNext());
1810	+	try {
1811	+	q.element();
1812	+	shouldThrow();
1813	+	} catch (NoSuchElementException success) {}
1814	+	try {
1815	+	q.iterator().next();
1816	+	shouldThrow();
1817	+	} catch (NoSuchElementException success) {}
1818	+	try {
1819	+	q.remove();
1820	+	shouldThrow();
1821	+	} catch (NoSuchElementException success) {}
1822	+	} catch (InterruptedException fail) { threadUnexpectedException(fail); }
1823	+	}
1824	+
1825	+	void assertSerialEquals(Object x, Object y) {
1826	+	assertTrue(Arrays.equals(serialBytes(x), serialBytes(y)));
1827	+	}
1828	+
1829	+	void assertNotSerialEquals(Object x, Object y) {
1830	+	assertFalse(Arrays.equals(serialBytes(x), serialBytes(y)));
1831	+	}
1832	+
1833	+	byte[] serialBytes(Object o) {
1834	+	try {
1835	+	ByteArrayOutputStream bos = new ByteArrayOutputStream();
1836	+	ObjectOutputStream oos = new ObjectOutputStream(bos);
1837	+	oos.writeObject(o);
1838	+	oos.flush();
1839	+	oos.close();
1840	+	return bos.toByteArray();
1841	+	} catch (Throwable fail) {
1842	+	threadUnexpectedException(fail);
1843	+	return new byte[0];
1844	+	}
1845	+	}
1846	+
1847	+	void assertImmutable(final Object o) {
1848	+	if (o instanceof Collection) {
1849	+	assertThrows(
1850	+	UnsupportedOperationException.class,
1851	+	new Runnable() { public void run() {
1852	+	((Collection) o).add(null);}});
1853	+	}
1854	+	}
1855	+
1856	+	@SuppressWarnings("unchecked")
1857	+	<T> T serialClone(T o) {
1858	+	try {
1859	+	ObjectInputStream ois = new ObjectInputStream
1860	+	(new ByteArrayInputStream(serialBytes(o)));
1861	+	T clone = (T) ois.readObject();
1862	+	if (o == clone) assertImmutable(o);
1863	+	assertSame(o.getClass(), clone.getClass());
1864	+	return clone;
1865	+	} catch (Throwable fail) {
1866	+	threadUnexpectedException(fail);
1867	+	return null;
1868	+	}
1869	+	}
1870	+
1871	+	/**
1872	+	* A version of serialClone that leaves error handling (for
1873	+	* e.g. NotSerializableException) up to the caller.
1874	+	*/
1875	+	@SuppressWarnings("unchecked")
1876	+	<T> T serialClonePossiblyFailing(T o)
1877	+	throws ReflectiveOperationException, java.io.IOException {
1878	+	ByteArrayOutputStream bos = new ByteArrayOutputStream();
1879	+	ObjectOutputStream oos = new ObjectOutputStream(bos);
1880	+	oos.writeObject(o);
1881	+	oos.flush();
1882	+	oos.close();
1883	+	ObjectInputStream ois = new ObjectInputStream
1884	+	(new ByteArrayInputStream(bos.toByteArray()));
1885	+	T clone = (T) ois.readObject();
1886	+	if (o == clone) assertImmutable(o);
1887	+	assertSame(o.getClass(), clone.getClass());
1888	+	return clone;
1889	+	}
1890	+
1891	+	/**
1892	+	* If o implements Cloneable and has a public clone method,
1893	+	* returns a clone of o, else null.
1894	+	*/
1895	+	@SuppressWarnings("unchecked")
1896	+	<T> T cloneableClone(T o) {
1897	+	if (!(o instanceof Cloneable)) return null;
1898	+	final T clone;
1899	+	try {
1900	+	clone = (T) o.getClass().getMethod("clone").invoke(o);
1901	+	} catch (NoSuchMethodException ok) {
1902	+	return null;
1903	+	} catch (ReflectiveOperationException unexpected) {
1904	+	throw new Error(unexpected);
1905	+	}
1906	+	assertNotSame(o, clone); // not 100% guaranteed by spec
1907	+	assertSame(o.getClass(), clone.getClass());
1908	+	return clone;
1909	+	}
1910	+
1911	+	public void assertThrows(Class<? extends Throwable> expectedExceptionClass,
1912	+	Runnable... throwingActions) {
1913	+	for (Runnable throwingAction : throwingActions) {
1914	+	boolean threw = false;
1915	+	try { throwingAction.run(); }
1916	+	catch (Throwable t) {
1917	+	threw = true;
1918	+	if (!expectedExceptionClass.isInstance(t)) {
1919	+	AssertionFailedError afe =
1920	+	new AssertionFailedError
1921	+	("Expected " + expectedExceptionClass.getName() +
1922	+	", got " + t.getClass().getName());
1923	+	afe.initCause(t);
1924	+	threadUnexpectedException(afe);
1925	+	}
1926	+	}
1927	+	if (!threw)
1928	+	shouldThrow(expectedExceptionClass.getName());
1929	+	}
1930	+	}
1931	+
1932	+	public void assertIteratorExhausted(Iterator<?> it) {
1933	+	try {
1934	+	it.next();
1935	+	shouldThrow();
1936	+	} catch (NoSuchElementException success) {}
1937	+	assertFalse(it.hasNext());
1938	+	}
1939	+
1940	+	public <T> Callable<T> callableThrowing(final Exception ex) {
1941	+	return new Callable<T>() { public T call() throws Exception { throw ex; }};
1942	+	}
1943	+
1944	+	public Runnable runnableThrowing(final RuntimeException ex) {
1945	+	return new Runnable() { public void run() { throw ex; }};
1946	+	}
1947	+
1948	+	/** A reusable thread pool to be shared by tests. */
1949	+	static final ExecutorService cachedThreadPool =
1950	+	new ThreadPoolExecutor(0, Integer.MAX_VALUE,
1951	+	1000L, MILLISECONDS,
1952	+	new SynchronousQueue<Runnable>());
1953	+
1954	+	/**
1955	+	* Returns maximum number of tasks that can be submitted to given
1956	+	* pool (with bounded queue) before saturation (when submission
1957	+	* throws RejectedExecutionException).
1958	+	*/
1959	+	static final int saturatedSize(ThreadPoolExecutor pool) {
1960	+	BlockingQueue<Runnable> q = pool.getQueue();
1961	+	return pool.getMaximumPoolSize() + q.size() + q.remainingCapacity();
1962	+	}
1963	+
1964	+	static <T> void shuffle(T[] array) {
1965	+	Collections.shuffle(Arrays.asList(array), ThreadLocalRandom.current());
1966	+	}
1967		}

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