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

Comparing jsr166/src/test/tck/JSR166TestCase.java (file contents):
Revision 1.4 by dl, Thu Sep 25 11:02:41 2003 UTC vs.
Revision 1.272 by dl, Tue Jan 26 13:33:06 2021 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 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.*;
12	<	import java.util.concurrent.*;
13	<	import java.io.*;
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.LockInfo;
53	+	import java.lang.management.ThreadInfo;
54	+	import java.lang.management.ThreadMXBean;
55	+	import java.lang.reflect.Constructor;
56	+	import java.lang.reflect.Method;
57	+	import java.lang.reflect.Modifier;
58	+	import java.security.CodeSource;
59	+	import java.security.Permission;
60	+	import java.security.PermissionCollection;
61	+	import java.security.Permissions;
62	+	import java.security.Policy;
63	+	import java.security.ProtectionDomain;
64	+	import java.security.SecurityPermission;
65	+	import java.util.ArrayList;
66	+	import java.util.Arrays;
67	+	import java.util.Collection;
68	+	import java.util.Collections;
69	+	import java.util.Date;
70	+	import java.util.Deque;
71	+	import java.util.Enumeration;
72	+	import java.util.HashSet;
73	+	import java.util.Iterator;
74	+	import java.util.List;
75	+	import java.util.NoSuchElementException;
76	+	import java.util.PropertyPermission;
77	+	import java.util.Queue;
78	+	import java.util.Set;
79	+	import java.util.concurrent.BlockingQueue;
80	+	import java.util.concurrent.Callable;
81	+	import java.util.concurrent.CountDownLatch;
82	+	import java.util.concurrent.CyclicBarrier;
83	+	import java.util.concurrent.ExecutionException;
84	+	import java.util.concurrent.Executor;
85	+	import java.util.concurrent.Executors;
86	+	import java.util.concurrent.ExecutorService;
87	+	import java.util.concurrent.ForkJoinPool;
88	+	import java.util.concurrent.Future;
89	+	import java.util.concurrent.FutureTask;
90	+	import java.util.concurrent.RecursiveAction;
91	+	import java.util.concurrent.RecursiveTask;
92	+	import java.util.concurrent.RejectedExecutionException;
93	+	import java.util.concurrent.RejectedExecutionHandler;
94	+	import java.util.concurrent.Semaphore;
95	+	import java.util.concurrent.ScheduledExecutorService;
96	+	import java.util.concurrent.ScheduledFuture;
97	+	import java.util.concurrent.SynchronousQueue;
98	+	import java.util.concurrent.ThreadFactory;
99	+	import java.util.concurrent.ThreadLocalRandom;
100	+	import java.util.concurrent.ThreadPoolExecutor;
101	+	import java.util.concurrent.TimeUnit;
102	+	import java.util.concurrent.TimeoutException;
103	+	import java.util.concurrent.atomic.AtomicBoolean;
104	+	import java.util.concurrent.atomic.AtomicReference;
105	+	import java.util.regex.Pattern;
106	+
107	+	import junit.framework.Test;
108	+	import junit.framework.TestCase;
109	+	import junit.framework.TestResult;
110	+	import junit.framework.TestSuite;
111
112		/**
113	<	* Base class for JSR166 Junit TCK tests.  Defines some constants and
114	<	* utility methods, as well as a simple framework for helping to make
115	<	* sure that assertions failing in generated threads cause the
116	<	* associated test that generated them to itself fail (which JUnit doe
117	<	* not otherwise arrange).  The rules for creating such tests are:
113	>	* Base class for JSR166 Junit TCK tests.  Defines some constants,
114	>	* utility methods and classes, as well as a simple framework for
115	>	* helping to make sure that assertions failing in generated threads
116	>	* cause the associated test that generated them to itself fail (which
117	>	* JUnit does not otherwise arrange).  The rules for creating such
118	>	* tests are:
119		*
120		* <ol>
121		*
122	<	* <li> All assertions in code running in generated threads must use
123	<	* the forms {@link threadFail} , {@link threadAssertTrue} {@link
124	<	* threadAssertEquals}, or {@link threadAssertNull}, (not
125	<	* <tt>fail</tt>, <tt>assertTrue</tt>, etc.) It is OK (but not
126	<	* particularly recommended) for other code to use these forms too.
127	<	* Only the most typically used JUnit assertion methods are defined
128	<	* this way, but enough to live with.</li>
122	>	* <li>All code not running in the main test thread (manually spawned threads
123	>	* or the common fork join pool) must be checked for failure (and completion!).
124	>	* Mechanisms that can be used to ensure this are:
125	>	*   <ol>
126	>	*   <li>Signalling via a synchronizer like AtomicInteger or CountDownLatch
127	>	*    that the task completed normally, which is checked before returning from
128	>	*    the test method in the main thread.
129	>	*   <li>Using the forms {@link #threadFail}, {@link #threadAssertTrue},
130	>	*    or {@link #threadAssertNull}, (not {@code fail}, {@code assertTrue}, etc.)
131	>	*    Only the most typically used JUnit assertion methods are defined
132	>	*    this way, but enough to live with.
133	>	*   <li>Recording failure explicitly using {@link #threadUnexpectedException}
134	>	*    or {@link #threadRecordFailure}.
135	>	*   <li>Using a wrapper like CheckedRunnable that uses one the mechanisms above.
136	>	*   </ol>
137		*
138	<	* <li> If you override {@link setUp} or {@link tearDown}, make sure
139	<	* to invoke <tt>super.setUp</tt> and <tt>super.tearDown</tt> within
138	>	* <li>If you override {@link #setUp} or {@link #tearDown}, make sure
139	>	* to invoke {@code super.setUp} and {@code super.tearDown} within
140		* them. These methods are used to clear and check for thread
141	<	* assertion failures.</li>
141	>	* assertion failures.
142		*
143	<	* <li>All delays and timeouts must use one of the constants {@link
144	<	* SHORT_DELAY_MS}, {@link SMALL_DELAY_MS}, {@link MEDIUM_DELAY_MS},
145	<	* {@link LONG_DELAY_MS}. The idea here is that a SHORT is always
146	<	* discriminatable from zero time, and always allows enough time for
147	<	* the small amounts of computation (creating a thread, calling a few
143	>	* <li>All delays and timeouts must use one of the constants {@code
144	>	* SHORT_DELAY_MS}, {@code SMALL_DELAY_MS}, {@code MEDIUM_DELAY_MS},
145	>	* {@code LONG_DELAY_MS}. The idea here is that a SHORT is always
146	>	* discriminable from zero time, and always allows enough time for the
147	>	* small amounts of computation (creating a thread, calling a few
148		* methods, etc) needed to reach a timeout point. Similarly, a SMALL
149		* is always discriminable as larger than SHORT and smaller than
150		* MEDIUM.  And so on. These constants are set to conservative values,
151		* but even so, if there is ever any doubt, they can all be increased
152	<	* in one spot to rerun tests on slower platforms</li>
152	>	* in one spot to rerun tests on slower platforms.
153	>	*
154	>	* Class Item is used for elements of collections and related
155	>	* purposes. Many tests rely on themir keys being equal to ints. To
156	>	* check these, methods mustEqual, mustContain, etc adapt the JUnit
157	>	* assert methods to intercept ints.
158		*
159	<	* <li> All threads generated must be joined inside each test case
160	<	* method (or <tt>fail</tt> to do so) before returning from the
161	<	* method. The {@link joinPool} method can be used to do this when
162	<	* using Executors.</li>
159	>	* <li>All threads generated must be joined inside each test case
160	>	* method (or {@code fail} to do so) before returning from the
161	>	* method. The {@code joinPool} method can be used to do this when
162	>	* using Executors.
163		*
164		* </ol>
165	+	*
166	+	* <p><b>Other notes</b>
167	+	* <ul>
168	+	*
169	+	* <li>Usually, there is one testcase method per JSR166 method
170	+	* covering "normal" operation, and then as many exception-testing
171	+	* methods as there are exceptions the method can throw. Sometimes
172	+	* there are multiple tests per JSR166 method when the different
173	+	* "normal" behaviors differ significantly. And sometimes testcases
174	+	* cover multiple methods when they cannot be tested in isolation.
175	+	*
176	+	* <li>The documentation style for testcases is to provide as javadoc
177	+	* a simple sentence or two describing the property that the testcase
178	+	* method purports to test. The javadocs do not say anything about how
179	+	* the property is tested. To find out, read the code.
180	+	*
181	+	* <li>These tests are "conformance tests", and do not attempt to
182	+	* test throughput, latency, scalability or other performance factors
183	+	* (see the separate "jtreg" tests for a set intended to check these
184	+	* for the most central aspects of functionality.) So, most tests use
185	+	* the smallest sensible numbers of threads, collection sizes, etc
186	+	* needed to check basic conformance.
187	+	*
188	+	* <li>The test classes currently do not declare inclusion in
189	+	* any particular package to simplify things for people integrating
190	+	* them in TCK test suites.
191	+	*
192	+	* <li>As a convenience, the {@code main} of this class (JSR166TestCase)
193	+	* runs all JSR166 unit tests.
194	+	*
195	+	* </ul>
196		*/
197		public class JSR166TestCase extends TestCase {
198	+	private static final boolean useSecurityManager =
199	+	Boolean.getBoolean("jsr166.useSecurityManager");
200	+
201	+	protected static final boolean expensiveTests =
202	+	Boolean.getBoolean("jsr166.expensiveTests");
203	+
204	+	/**
205	+	* If true, also run tests that are not part of the official tck
206	+	* because they test unspecified implementation details.
207	+	*/
208	+	protected static final boolean testImplementationDetails =
209	+	Boolean.getBoolean("jsr166.testImplementationDetails");
210	+
211	+	/**
212	+	* If true, report on stdout all "slow" tests, that is, ones that
213	+	* take more than profileThreshold milliseconds to execute.
214	+	*/
215	+	private static final boolean profileTests =
216	+	Boolean.getBoolean("jsr166.profileTests");
217	+
218	+	/**
219	+	* The number of milliseconds that tests are permitted for
220	+	* execution without being reported, when profileTests is set.
221	+	*/
222	+	private static final long profileThreshold =
223	+	Long.getLong("jsr166.profileThreshold", 100);
224	+
225	+	/**
226	+	* The number of repetitions per test (for tickling rare bugs).
227	+	*/
228	+	private static final int runsPerTest =
229	+	Integer.getInteger("jsr166.runsPerTest", 1);
230	+
231	+	/**
232	+	* The number of repetitions of the test suite (for finding leaks?).
233	+	*/
234	+	private static final int suiteRuns =
235	+	Integer.getInteger("jsr166.suiteRuns", 1);
236	+
237	+	/**
238	+	* Returns the value of the system property, or NaN if not defined.
239	+	*/
240	+	private static float systemPropertyValue(String name) {
241	+	String floatString = System.getProperty(name);
242	+	if (floatString == null)
243	+	return Float.NaN;
244	+	try {
245	+	return Float.parseFloat(floatString);
246	+	} catch (NumberFormatException ex) {
247	+	throw new IllegalArgumentException(
248	+	String.format("Bad float value in system property %s=%s",
249	+	name, floatString));
250	+	}
251	+	}
252	+
253	+	private static final ThreadMXBean THREAD_MXBEAN
254	+	= ManagementFactory.getThreadMXBean();
255	+
256	+	/**
257	+	* The scaling factor to apply to standard delays used in tests.
258	+	* May be initialized from any of:
259	+	* - the "jsr166.delay.factor" system property
260	+	* - the "test.timeout.factor" system property (as used by jtreg)
261	+	*   See: http://openjdk.java.net/jtreg/tag-spec.html
262	+	* - hard-coded fuzz factor when using a known slowpoke VM
263	+	*/
264	+	private static final float delayFactor = delayFactor();
265	+
266	+	private static float delayFactor() {
267	+	float x;
268	+	if (!Float.isNaN(x = systemPropertyValue("jsr166.delay.factor")))
269	+	return x;
270	+	if (!Float.isNaN(x = systemPropertyValue("test.timeout.factor")))
271	+	return x;
272	+	String prop = System.getProperty("java.vm.version");
273	+	if (prop != null && prop.matches(".*debug.*"))
274	+	return 4.0f; // How much slower is fastdebug than product?!
275	+	return 1.0f;
276	+	}
277	+
278	+	public JSR166TestCase() { super(); }
279	+	public JSR166TestCase(String name) { super(name); }
280	+
281	+	/**
282	+	* A filter for tests to run, matching strings of the form
283	+	* methodName(className), e.g. "testInvokeAll5(ForkJoinPoolTest)"
284	+	* Usefully combined with jsr166.runsPerTest.
285	+	*/
286	+	private static final Pattern methodFilter = methodFilter();
287	+
288	+	private static Pattern methodFilter() {
289	+	String regex = System.getProperty("jsr166.methodFilter");
290	+	return (regex == null) ? null : Pattern.compile(regex);
291	+	}
292	+
293	+	// Instrumentation to debug very rare, but very annoying hung test runs.
294	+	static volatile TestCase currentTestCase;
295	+	// static volatile int currentRun = 0;
296	+	static {
297	+	Runnable wedgedTestDetector = new Runnable() { public void run() {
298	+	// Avoid spurious reports with enormous runsPerTest.
299	+	// A single test case run should never take more than 1 second.
300	+	// But let's cap it at the high end too ...
301	+	final int timeoutMinutesMin = Math.max(runsPerTest / 60, 1)
302	+	* Math.max((int) delayFactor, 1);
303	+	final int timeoutMinutes = Math.min(15, timeoutMinutesMin);
304	+	for (TestCase lastTestCase = currentTestCase;;) {
305	+	try { MINUTES.sleep(timeoutMinutes); }
306	+	catch (InterruptedException unexpected) { break; }
307	+	if (lastTestCase == currentTestCase) {
308	+	System.err.printf(
309	+	"Looks like we're stuck running test: %s%n",
310	+	lastTestCase);
311	+	//                     System.err.printf(
312	+	//                         "Looks like we're stuck running test: %s (%d/%d)%n",
313	+	//                         lastTestCase, currentRun, runsPerTest);
314	+	//                     System.err.println("availableProcessors=" +
315	+	//                         Runtime.getRuntime().availableProcessors());
316	+	//                     System.err.printf("cpu model = %s%n", cpuModel());
317	+	dumpTestThreads();
318	+	// one stack dump is probably enough; more would be spam
319	+	break;
320	+	}
321	+	lastTestCase = currentTestCase;
322	+	}}};
323	+	Thread thread = new Thread(wedgedTestDetector, "WedgedTestDetector");
324	+	thread.setDaemon(true);
325	+	thread.start();
326	+	}
327	+
328	+	//     public static String cpuModel() {
329	+	//         try {
330	+	//             java.util.regex.Matcher matcher
331	+	//               = Pattern.compile("model name\\s*: (.*)")
332	+	//                 .matcher(new String(
333	+	//                     java.nio.file.Files.readAllBytes(
334	+	//                         java.nio.file.Paths.get("/proc/cpuinfo")), "UTF-8"));
335	+	//             matcher.find();
336	+	//             return matcher.group(1);
337	+	//         } catch (Exception ex) { return null; }
338	+	//     }
339	+
340	+	public void runBare() throws Throwable {
341	+	currentTestCase = this;
342	+	if (methodFilter == null
343	+	|| methodFilter.matcher(toString()).find())
344	+	super.runBare();
345	+	}
346	+
347	+	protected void runTest() throws Throwable {
348	+	for (int i = 0; i < runsPerTest; i++) {
349	+	// currentRun = i;
350	+	if (profileTests)
351	+	runTestProfiled();
352	+	else
353	+	super.runTest();
354	+	}
355	+	}
356	+
357	+	protected void runTestProfiled() throws Throwable {
358	+	for (int i = 0; i < 2; i++) {
359	+	long startTime = System.nanoTime();
360	+	super.runTest();
361	+	long elapsedMillis = millisElapsedSince(startTime);
362	+	if (elapsedMillis < profileThreshold)
363	+	break;
364	+	// Never report first run of any test; treat it as a
365	+	// warmup run, notably to trigger all needed classloading,
366	+	if (i > 0)
367	+	System.out.printf("%s: %d%n", toString(), elapsedMillis);
368	+	}
369	+	}
370	+
371	+	/**
372	+	* Runs all JSR166 unit tests using junit.textui.TestRunner.
373	+	*/
374	+	public static void main(String[] args) {
375	+	main(suite(), args);
376	+	}
377	+
378	+	static class PithyResultPrinter extends junit.textui.ResultPrinter {
379	+	PithyResultPrinter(java.io.PrintStream writer) { super(writer); }
380	+	long runTime;
381	+	public void startTest(Test test) {}
382	+	protected void printHeader(long runTime) {
383	+	this.runTime = runTime; // defer printing for later
384	+	}
385	+	protected void printFooter(TestResult result) {
386	+	if (result.wasSuccessful()) {
387	+	getWriter().println("OK (" + result.runCount() + " tests)"
388	+	+ "  Time: " + elapsedTimeAsString(runTime));
389	+	} else {
390	+	getWriter().println("Time: " + elapsedTimeAsString(runTime));
391	+	super.printFooter(result);
392	+	}
393	+	}
394	+	}
395	+
396	+	/**
397	+	* Returns a TestRunner that doesn't bother with unnecessary
398	+	* fluff, like printing a "." for each test case.
399	+	*/
400	+	static junit.textui.TestRunner newPithyTestRunner() {
401	+	junit.textui.TestRunner runner = new junit.textui.TestRunner();
402	+	runner.setPrinter(new PithyResultPrinter(System.out));
403	+	return runner;
404	+	}
405	+
406	+	/**
407	+	* Runs all unit tests in the given test suite.
408	+	* Actual behavior influenced by jsr166.* system properties.
409	+	*/
410	+	static void main(Test suite, String[] args) {
411	+	if (useSecurityManager) {
412	+	System.err.println("Setting a permissive security manager");
413	+	Policy.setPolicy(permissivePolicy());
414	+	System.setSecurityManager(new SecurityManager());
415	+	}
416	+	for (int i = 0; i < suiteRuns; i++) {
417	+	TestResult result = newPithyTestRunner().doRun(suite);
418	+	if (!result.wasSuccessful())
419	+	System.exit(1);
420	+	System.gc();
421	+	System.runFinalization();
422	+	}
423	+	}
424	+
425	+	public static TestSuite newTestSuite(Object... suiteOrClasses) {
426	+	TestSuite suite = new TestSuite();
427	+	for (Object suiteOrClass : suiteOrClasses) {
428	+	if (suiteOrClass instanceof TestSuite)
429	+	suite.addTest((TestSuite) suiteOrClass);
430	+	else if (suiteOrClass instanceof Class)
431	+	suite.addTest(new TestSuite((Class<?>) suiteOrClass));
432	+	else
433	+	throw new ClassCastException("not a test suite or class");
434	+	}
435	+	return suite;
436	+	}
437	+
438	+	public static void addNamedTestClasses(TestSuite suite,
439	+	String... testClassNames) {
440	+	for (String testClassName : testClassNames) {
441	+	try {
442	+	Class<?> testClass = Class.forName(testClassName);
443	+	Method m = testClass.getDeclaredMethod("suite");
444	+	suite.addTest(newTestSuite((Test)m.invoke(null)));
445	+	} catch (ReflectiveOperationException e) {
446	+	throw new AssertionError("Missing test class", e);
447	+	}
448	+	}
449	+	}
450	+
451	+	public static final double JAVA_CLASS_VERSION;
452	+	public static final String JAVA_SPECIFICATION_VERSION;
453	+	static {
454	+	try {
455	+	JAVA_CLASS_VERSION = java.security.AccessController.doPrivileged(
456	+	new java.security.PrivilegedAction<Double>() {
457	+	public Double run() {
458	+	return Double.valueOf(System.getProperty("java.class.version"));}});
459	+	JAVA_SPECIFICATION_VERSION = java.security.AccessController.doPrivileged(
460	+	new java.security.PrivilegedAction<String>() {
461	+	public String run() {
462	+	return System.getProperty("java.specification.version");}});
463	+	} catch (Throwable t) {
464	+	throw new Error(t);
465	+	}
466	+	}
467	+
468	+	public static boolean atLeastJava6()  { return JAVA_CLASS_VERSION >= 50.0; }
469	+	public static boolean atLeastJava7()  { return JAVA_CLASS_VERSION >= 51.0; }
470	+	public static boolean atLeastJava8()  { return JAVA_CLASS_VERSION >= 52.0; }
471	+	public static boolean atLeastJava9()  { return JAVA_CLASS_VERSION >= 53.0; }
472	+	public static boolean atLeastJava10() { return JAVA_CLASS_VERSION >= 54.0; }
473	+	public static boolean atLeastJava11() { return JAVA_CLASS_VERSION >= 55.0; }
474	+	public static boolean atLeastJava12() { return JAVA_CLASS_VERSION >= 56.0; }
475	+	public static boolean atLeastJava13() { return JAVA_CLASS_VERSION >= 57.0; }
476	+	public static boolean atLeastJava14() { return JAVA_CLASS_VERSION >= 58.0; }
477	+	public static boolean atLeastJava15() { return JAVA_CLASS_VERSION >= 59.0; }
478	+	public static boolean atLeastJava16() { return JAVA_CLASS_VERSION >= 60.0; }
479	+	public static boolean atLeastJava17() { return JAVA_CLASS_VERSION >= 61.0; }
480	+
481	+	/**
482	+	* Collects all JSR166 unit tests as one suite.
483	+	*/
484	+	public static Test suite() {
485	+	// Java7+ test classes
486	+	TestSuite suite = newTestSuite(
487	+	ForkJoinPoolTest.suite(),
488	+	ForkJoinTaskTest.suite(),
489	+	RecursiveActionTest.suite(),
490	+	RecursiveTaskTest.suite(),
491	+	LinkedTransferQueueTest.suite(),
492	+	PhaserTest.suite(),
493	+	ThreadLocalRandomTest.suite(),
494	+	AbstractExecutorServiceTest.suite(),
495	+	AbstractQueueTest.suite(),
496	+	AbstractQueuedSynchronizerTest.suite(),
497	+	AbstractQueuedLongSynchronizerTest.suite(),
498	+	ArrayBlockingQueueTest.suite(),
499	+	ArrayDequeTest.suite(),
500	+	ArrayListTest.suite(),
501	+	AtomicBooleanTest.suite(),
502	+	AtomicIntegerArrayTest.suite(),
503	+	AtomicIntegerFieldUpdaterTest.suite(),
504	+	AtomicIntegerTest.suite(),
505	+	AtomicLongArrayTest.suite(),
506	+	AtomicLongFieldUpdaterTest.suite(),
507	+	AtomicLongTest.suite(),
508	+	AtomicMarkableReferenceTest.suite(),
509	+	AtomicReferenceArrayTest.suite(),
510	+	AtomicReferenceFieldUpdaterTest.suite(),
511	+	AtomicReferenceTest.suite(),
512	+	AtomicStampedReferenceTest.suite(),
513	+	ConcurrentHashMapTest.suite(),
514	+	ConcurrentLinkedDequeTest.suite(),
515	+	ConcurrentLinkedQueueTest.suite(),
516	+	ConcurrentSkipListMapTest.suite(),
517	+	ConcurrentSkipListSubMapTest.suite(),
518	+	ConcurrentSkipListSetTest.suite(),
519	+	ConcurrentSkipListSubSetTest.suite(),
520	+	CopyOnWriteArrayListTest.suite(),
521	+	CopyOnWriteArraySetTest.suite(),
522	+	CountDownLatchTest.suite(),
523	+	CountedCompleterTest.suite(),
524	+	CyclicBarrierTest.suite(),
525	+	DelayQueueTest.suite(),
526	+	EntryTest.suite(),
527	+	ExchangerTest.suite(),
528	+	ExecutorsTest.suite(),
529	+	ExecutorCompletionServiceTest.suite(),
530	+	FutureTaskTest.suite(),
531	+	HashtableTest.suite(),
532	+	LinkedBlockingDequeTest.suite(),
533	+	LinkedBlockingQueueTest.suite(),
534	+	LinkedListTest.suite(),
535	+	LockSupportTest.suite(),
536	+	PriorityBlockingQueueTest.suite(),
537	+	PriorityQueueTest.suite(),
538	+	ReentrantLockTest.suite(),
539	+	ReentrantReadWriteLockTest.suite(),
540	+	ScheduledExecutorTest.suite(),
541	+	ScheduledExecutorSubclassTest.suite(),
542	+	SemaphoreTest.suite(),
543	+	SynchronousQueueTest.suite(),
544	+	SystemTest.suite(),
545	+	ThreadLocalTest.suite(),
546	+	ThreadPoolExecutorTest.suite(),
547	+	ThreadPoolExecutorSubclassTest.suite(),
548	+	ThreadTest.suite(),
549	+	TimeUnitTest.suite(),
550	+	TreeMapTest.suite(),
551	+	TreeSetTest.suite(),
552	+	TreeSubMapTest.suite(),
553	+	TreeSubSetTest.suite(),
554	+	VectorTest.suite());
555	+
556	+	// Java8+ test classes
557	+	if (atLeastJava8()) {
558	+	String[] java8TestClassNames = {
559	+	"ArrayDeque8Test",
560	+	"Atomic8Test",
561	+	"CompletableFutureTest",
562	+	"ConcurrentHashMap8Test",
563	+	"CountedCompleter8Test",
564	+	"DoubleAccumulatorTest",
565	+	"DoubleAdderTest",
566	+	"ForkJoinPool8Test",
567	+	"ForkJoinTask8Test",
568	+	"HashMapTest",
569	+	"LinkedBlockingDeque8Test",
570	+	"LinkedBlockingQueue8Test",
571	+	"LinkedHashMapTest",
572	+	"LongAccumulatorTest",
573	+	"LongAdderTest",
574	+	"SplittableRandomTest",
575	+	"StampedLockTest",
576	+	"SubmissionPublisherTest",
577	+	"ThreadLocalRandom8Test",
578	+	"TimeUnit8Test",
579	+	};
580	+	addNamedTestClasses(suite, java8TestClassNames);
581	+	}
582	+
583	+	// Java9+ test classes
584	+	if (atLeastJava9()) {
585	+	String[] java9TestClassNames = {
586	+	"AtomicBoolean9Test",
587	+	"AtomicInteger9Test",
588	+	"AtomicIntegerArray9Test",
589	+	"AtomicLong9Test",
590	+	"AtomicLongArray9Test",
591	+	"AtomicReference9Test",
592	+	"AtomicReferenceArray9Test",
593	+	"ExecutorCompletionService9Test",
594	+	"ForkJoinPool9Test",
595	+	};
596	+	addNamedTestClasses(suite, java9TestClassNames);
597	+	}
598	+
599	+	return suite;
600	+	}
601	+
602	+	/** Returns list of junit-style test method names in given class. */
603	+	public static ArrayList<String> testMethodNames(Class<?> testClass) {
604	+	Method[] methods = testClass.getDeclaredMethods();
605	+	ArrayList<String> names = new ArrayList<>(methods.length);
606	+	for (Method method : methods) {
607	+	if (method.getName().startsWith("test")
608	+	&& Modifier.isPublic(method.getModifiers())
609	+	// method.getParameterCount() requires jdk8+
610	+	&& method.getParameterTypes().length == 0) {
611	+	names.add(method.getName());
612	+	}
613	+	}
614	+	return names;
615	+	}
616	+
617	+	/**
618	+	* Returns junit-style testSuite for the given test class, but
619	+	* parameterized by passing extra data to each test.
620	+	*/
621	+	public static <ExtraData> Test parameterizedTestSuite
622	+	(Class<? extends JSR166TestCase> testClass,
623	+	Class<ExtraData> dataClass,
624	+	ExtraData data) {
625	+	try {
626	+	TestSuite suite = new TestSuite();
627	+	Constructor c =
628	+	testClass.getDeclaredConstructor(dataClass, String.class);
629	+	for (String methodName : testMethodNames(testClass))
630	+	suite.addTest((Test) c.newInstance(data, methodName));
631	+	return suite;
632	+	} catch (ReflectiveOperationException e) {
633	+	throw new AssertionError(e);
634	+	}
635	+	}
636	+
637	+	/**
638	+	* Returns junit-style testSuite for the jdk8 extension of the
639	+	* given test class, but parameterized by passing extra data to
640	+	* each test.  Uses reflection to allow compilation in jdk7.
641	+	*/
642	+	public static <ExtraData> Test jdk8ParameterizedTestSuite
643	+	(Class<? extends JSR166TestCase> testClass,
644	+	Class<ExtraData> dataClass,
645	+	ExtraData data) {
646	+	if (atLeastJava8()) {
647	+	String name = testClass.getName();
648	+	String name8 = name.replaceAll("Test$", "8Test");
649	+	if (name.equals(name8)) throw new AssertionError(name);
650	+	try {
651	+	return (Test)
652	+	Class.forName(name8)
653	+	.getMethod("testSuite", dataClass)
654	+	.invoke(null, data);
655	+	} catch (ReflectiveOperationException e) {
656	+	throw new AssertionError(e);
657	+	}
658	+	} else {
659	+	return new TestSuite();
660	+	}
661	+	}
662	+
663	+	// Delays for timing-dependent tests, in milliseconds.
664
665		public static long SHORT_DELAY_MS;
666		public static long SMALL_DELAY_MS;
667		public static long MEDIUM_DELAY_MS;
668		public static long LONG_DELAY_MS;
669
670	+	/**
671	+	* A delay significantly longer than LONG_DELAY_MS.
672	+	* Use this in a thread that is waited for via awaitTermination(Thread).
673	+	*/
674	+	public static long LONGER_DELAY_MS;
675	+
676	+	private static final long RANDOM_TIMEOUT;
677	+	private static final long RANDOM_EXPIRED_TIMEOUT;
678	+	private static final TimeUnit RANDOM_TIMEUNIT;
679	+	static {
680	+	ThreadLocalRandom rnd = ThreadLocalRandom.current();
681	+	long[] timeouts = { Long.MIN_VALUE, -1, 0, 1, Long.MAX_VALUE };
682	+	RANDOM_TIMEOUT = timeouts[rnd.nextInt(timeouts.length)];
683	+	RANDOM_EXPIRED_TIMEOUT = timeouts[rnd.nextInt(3)];
684	+	TimeUnit[] timeUnits = TimeUnit.values();
685	+	RANDOM_TIMEUNIT = timeUnits[rnd.nextInt(timeUnits.length)];
686	+	}
687
688		/**
689	<	* Return the shortest timed delay. This could
690	<	* be reimplmented to use for example a Property.
691	<	*/
692	<	protected long getShortDelay() {
693	<	return 100;
689	>	* Returns a timeout for use when any value at all will do.
690	>	*/
691	>	static long randomTimeout() { return RANDOM_TIMEOUT; }
692	>
693	>	/**
694	>	* Returns a timeout that means "no waiting", i.e. not positive.
695	>	*/
696	>	static long randomExpiredTimeout() { return RANDOM_EXPIRED_TIMEOUT; }
697	>
698	>	/**
699	>	* Returns a random non-null TimeUnit.
700	>	*/
701	>	static TimeUnit randomTimeUnit() { return RANDOM_TIMEUNIT; }
702	>
703	>	/**
704	>	* Returns a random boolean; a "coin flip".
705	>	*/
706	>	static boolean randomBoolean() {
707	>	return ThreadLocalRandom.current().nextBoolean();
708	>	}
709	>
710	>	/**
711	>	* Returns a random element from given choices.
712	>	*/
713	>	<T> T chooseRandomly(List<T> choices) {
714	>	return choices.get(ThreadLocalRandom.current().nextInt(choices.size()));
715	>	}
716	>
717	>	/**
718	>	* Returns a random element from given choices.
719	>	*/
720	>	@SuppressWarnings("unchecked")
721	>	<T> T chooseRandomly(T... choices) {
722	>	return choices[ThreadLocalRandom.current().nextInt(choices.length)];
723		}
724
725	+	/**
726	+	* Returns the shortest timed delay. This can be scaled up for
727	+	* slow machines using the jsr166.delay.factor system property,
728	+	* or via jtreg's -timeoutFactor: flag.
729	+	* http://openjdk.java.net/jtreg/command-help.html
730	+	*/
731	+	protected long getShortDelay() {
732	+	return (long) (50 * delayFactor);
733	+	}
734
735		/**
736	<	* Set delays as multiples fo SHORT_DELAY.
736	>	* Sets delays as multiples of SHORT_DELAY.
737		*/
738	<	protected  void setDelays() {
738	>	protected void setDelays() {
739		SHORT_DELAY_MS = getShortDelay();
740	<	SMALL_DELAY_MS = SHORT_DELAY_MS * 5;
740	>	SMALL_DELAY_MS  = SHORT_DELAY_MS * 5;
741		MEDIUM_DELAY_MS = SHORT_DELAY_MS * 10;
742	<	LONG_DELAY_MS = SHORT_DELAY_MS * 50;
742	>	LONG_DELAY_MS   = SHORT_DELAY_MS * 200;
743	>	LONGER_DELAY_MS = 2 * LONG_DELAY_MS;
744		}
745
746	+	private static final long TIMEOUT_DELAY_MS
747	+	= (long) (12.0 * Math.cbrt(delayFactor));
748	+
749		/**
750	<	* Flag set true if any threadAssert methods fail
750	>	* Returns a timeout in milliseconds to be used in tests that verify
751	>	* that operations block or time out.  We want this to be longer
752	>	* than the OS scheduling quantum, but not too long, so don't scale
753	>	* linearly with delayFactor; we use "crazy" cube root instead.
754		*/
755	<	protected volatile boolean threadFailed;
755	>	static long timeoutMillis() {
756	>	return TIMEOUT_DELAY_MS;
757	>	}
758
759		/**
760	<	* Initialize test to indicate that no thread assertions have failed
760	>	* Returns a new Date instance representing a time at least
761	>	* delayMillis milliseconds in the future.
762		*/
763	<	public void setUp() {
763	>	Date delayedDate(long delayMillis) {
764	>	// Add 1 because currentTimeMillis is known to round into the past.
765	>	return new Date(System.currentTimeMillis() + delayMillis + 1);
766	>	}
767	>
768	>	/**
769	>	* The first exception encountered if any threadAssertXXX method fails.
770	>	*/
771	>	private final AtomicReference<Throwable> threadFailure
772	>	= new AtomicReference<>(null);
773	>
774	>	/**
775	>	* Records an exception so that it can be rethrown later in the test
776	>	* harness thread, triggering a test case failure.  Only the first
777	>	* failure is recorded; subsequent calls to this method from within
778	>	* the same test have no effect.
779	>	*/
780	>	public void threadRecordFailure(Throwable t) {
781	>	System.err.println(t);
782	>	if (threadFailure.compareAndSet(null, t))
783	>	dumpTestThreads();
784	>	}
785	>
786	>	public void setUp() {
787		setDelays();
788	<	threadFailed = false;
788	>	}
789	>
790	>	void tearDownFail(String format, Object... args) {
791	>	String msg = toString() + ": " + String.format(format, args);
792	>	System.err.println(msg);
793	>	dumpTestThreads();
794	>	throw new AssertionError(msg);
795		}
796
797		/**
798	<	* Trigger test case failure if any thread assertions have failed
798	>	* Extra checks that get done for all test cases.
799	>	*
800	>	* Triggers test case failure if any thread assertions have failed,
801	>	* by rethrowing, in the test harness thread, any exception recorded
802	>	* earlier by threadRecordFailure.
803	>	*
804	>	* Triggers test case failure if interrupt status is set in the main thread.
805		*/
806	<	public void tearDown() {
807	<	assertFalse(threadFailed);
806	>	public void tearDown() throws Exception {
807	>	Throwable t = threadFailure.getAndSet(null);
808	>	if (t != null) {
809	>	if (t instanceof Error)
810	>	throw (Error) t;
811	>	else if (t instanceof RuntimeException)
812	>	throw (RuntimeException) t;
813	>	else if (t instanceof Exception)
814	>	throw (Exception) t;
815	>	else
816	>	throw new AssertionError(t.toString(), t);
817	>	}
818	>
819	>	if (Thread.interrupted())
820	>	tearDownFail("interrupt status set in main thread");
821	>
822	>	checkForkJoinPoolThreadLeaks();
823		}
824
825	+	/**
826	+	* Finds missing PoolCleaners
827	+	*/
828	+	void checkForkJoinPoolThreadLeaks() throws InterruptedException {
829	+	Thread[] survivors = new Thread[7];
830	+	int count = Thread.enumerate(survivors);
831	+	for (int i = 0; i < count; i++) {
832	+	Thread thread = survivors[i];
833	+	String name = thread.getName();
834	+	if (name.startsWith("ForkJoinPool-")) {
835	+	// give thread some time to terminate
836	+	thread.join(LONG_DELAY_MS);
837	+	if (thread.isAlive())
838	+	tearDownFail("Found leaked ForkJoinPool thread thread=%s",
839	+	thread);
840	+	}
841	+	}
842	+
843	+	if (!ForkJoinPool.commonPool()
844	+	.awaitQuiescence(LONG_DELAY_MS, MILLISECONDS))
845	+	tearDownFail("ForkJoin common pool thread stuck");
846	+	}
847	+
848	+	/**
849	+	* Just like fail(reason), but additionally recording (using
850	+	* threadRecordFailure) any AssertionError thrown, so that the
851	+	* current testcase will fail.
852	+	*/
853		public void threadFail(String reason) {
854	<	threadFailed = true;
855	<	fail(reason);
854	>	try {
855	>	fail(reason);
856	>	} catch (AssertionError fail) {
857	>	threadRecordFailure(fail);
858	>	throw fail;
859	>	}
860		}
861
862	+	/**
863	+	* Just like assertTrue(b), but additionally recording (using
864	+	* threadRecordFailure) any AssertionError thrown, so that the
865	+	* current testcase will fail.
866	+	*/
867		public void threadAssertTrue(boolean b) {
868	<	if (!b) {
108	<	threadFailed = true;
868	>	try {
869		assertTrue(b);
870	+	} catch (AssertionError fail) {
871	+	threadRecordFailure(fail);
872	+	throw fail;
873		}
874		}
875	+
876	+	/**
877	+	* Just like assertFalse(b), but additionally recording (using
878	+	* threadRecordFailure) any AssertionError thrown, so that the
879	+	* current testcase will fail.
880	+	*/
881		public void threadAssertFalse(boolean b) {
882	<	if (b) {
114	<	threadFailed = true;
882	>	try {
883		assertFalse(b);
884	+	} catch (AssertionError fail) {
885	+	threadRecordFailure(fail);
886	+	throw fail;
887		}
888		}
889	+
890	+	/**
891	+	* Just like assertNull(x), but additionally recording (using
892	+	* threadRecordFailure) any AssertionError thrown, so that the
893	+	* current testcase will fail.
894	+	*/
895		public void threadAssertNull(Object x) {
896	<	if (x != null) {
120	<	threadFailed = true;
896	>	try {
897		assertNull(x);
898	+	} catch (AssertionError fail) {
899	+	threadRecordFailure(fail);
900	+	throw fail;
901		}
902		}
903	+
904	+	/**
905	+	* Just like assertEquals(x, y), but additionally recording (using
906	+	* threadRecordFailure) any AssertionError thrown, so that the
907	+	* current testcase will fail.
908	+	*/
909		public void threadAssertEquals(long x, long y) {
910	<	if (x != y) {
126	<	threadFailed = true;
910	>	try {
911		assertEquals(x, y);
912	+	} catch (AssertionError fail) {
913	+	threadRecordFailure(fail);
914	+	throw fail;
915		}
916		}
917	+
918	+	/**
919	+	* Just like assertEquals(x, y), but additionally recording (using
920	+	* threadRecordFailure) any AssertionError thrown, so that the
921	+	* current testcase will fail.
922	+	*/
923		public void threadAssertEquals(Object x, Object y) {
924	<	if (x != y && (x == null || !x.equals(y))) {
132	<	threadFailed = true;
924	>	try {
925		assertEquals(x, y);
926	+	} catch (AssertionError fail) {
927	+	threadRecordFailure(fail);
928	+	throw fail;
929	+	} catch (Throwable fail) {
930	+	threadUnexpectedException(fail);
931		}
932		}
933
934	+	/**
935	+	* Just like assertSame(x, y), but additionally recording (using
936	+	* threadRecordFailure) any AssertionError thrown, so that the
937	+	* current testcase will fail.
938	+	*/
939	+	public void threadAssertSame(Object x, Object y) {
940	+	try {
941	+	assertSame(x, y);
942	+	} catch (AssertionError fail) {
943	+	threadRecordFailure(fail);
944	+	throw fail;
945	+	}
946	+	}
947	+
948	+	/**
949	+	* Calls threadFail with message "should throw exception".
950	+	*/
951		public void threadShouldThrow() {
952	<	threadFailed = true;
953	<	fail("should throw exception");
952	>	threadFail("should throw exception");
953	>	}
954	>
955	>	/**
956	>	* Calls threadFail with message "should throw" + exceptionName.
957	>	*/
958	>	public void threadShouldThrow(String exceptionName) {
959	>	threadFail("should throw " + exceptionName);
960	>	}
961	>
962	>	/**
963	>	* Records the given exception using {@link #threadRecordFailure},
964	>	* then rethrows the exception, wrapping it in an AssertionError
965	>	* if necessary.
966	>	*/
967	>	public void threadUnexpectedException(Throwable t) {
968	>	threadRecordFailure(t);
969	>	t.printStackTrace();
970	>	if (t instanceof RuntimeException)
971	>	throw (RuntimeException) t;
972	>	else if (t instanceof Error)
973	>	throw (Error) t;
974	>	else
975	>	throw new AssertionError("unexpected exception: " + t, t);
976	>	}
977	>
978	>	/**
979	>	* Delays, via Thread.sleep, for the given millisecond delay, but
980	>	* if the sleep is shorter than specified, may re-sleep or yield
981	>	* until time elapses.  Ensures that the given time, as measured
982	>	* by System.nanoTime(), has elapsed.
983	>	*/
984	>	static void delay(long millis) throws InterruptedException {
985	>	long nanos = millis * (1000 * 1000);
986	>	final long wakeupTime = System.nanoTime() + nanos;
987	>	do {
988	>	if (millis > 0L)
989	>	Thread.sleep(millis);
990	>	else // too short to sleep
991	>	Thread.yield();
992	>	nanos = wakeupTime - System.nanoTime();
993	>	millis = nanos / (1000 * 1000);
994	>	} while (nanos >= 0L);
995	>	}
996	>
997	>	/**
998	>	* Allows use of try-with-resources with per-test thread pools.
999	>	*/
1000	>	class PoolCleaner implements AutoCloseable {
1001	>	private final ExecutorService pool;
1002	>	public PoolCleaner(ExecutorService pool) { this.pool = pool; }
1003	>	public void close() { joinPool(pool); }
1004	>	}
1005	>
1006	>	/**
1007	>	* An extension of PoolCleaner that has an action to release the pool.
1008	>	*/
1009	>	class PoolCleanerWithReleaser extends PoolCleaner {
1010	>	private final Runnable releaser;
1011	>	public PoolCleanerWithReleaser(ExecutorService pool, Runnable releaser) {
1012	>	super(pool);
1013	>	this.releaser = releaser;
1014	>	}
1015	>	public void close() {
1016	>	try {
1017	>	releaser.run();
1018	>	} finally {
1019	>	super.close();
1020	>	}
1021	>	}
1022	>	}
1023	>
1024	>	PoolCleaner cleaner(ExecutorService pool) {
1025	>	return new PoolCleaner(pool);
1026	>	}
1027	>
1028	>	PoolCleaner cleaner(ExecutorService pool, Runnable releaser) {
1029	>	return new PoolCleanerWithReleaser(pool, releaser);
1030	>	}
1031	>
1032	>	PoolCleaner cleaner(ExecutorService pool, CountDownLatch latch) {
1033	>	return new PoolCleanerWithReleaser(pool, releaser(latch));
1034	>	}
1035	>
1036	>	Runnable releaser(final CountDownLatch latch) {
1037	>	return new Runnable() { public void run() {
1038	>	do { latch.countDown(); }
1039	>	while (latch.getCount() > 0);
1040	>	}};
1041	>	}
1042	>
1043	>	PoolCleaner cleaner(ExecutorService pool, AtomicBoolean flag) {
1044	>	return new PoolCleanerWithReleaser(pool, releaser(flag));
1045	>	}
1046	>
1047	>	Runnable releaser(final AtomicBoolean flag) {
1048	>	return new Runnable() { public void run() { flag.set(true); }};
1049	>	}
1050	>
1051	>	/**
1052	>	* Waits out termination of a thread pool or fails doing so.
1053	>	*/
1054	>	void joinPool(ExecutorService pool) {
1055	>	try {
1056	>	pool.shutdown();
1057	>	if (!pool.awaitTermination(2 * LONG_DELAY_MS, MILLISECONDS)) {
1058	>	try {
1059	>	threadFail("ExecutorService " + pool +
1060	>	" did not terminate in a timely manner");
1061	>	} finally {
1062	>	// last resort, for the benefit of subsequent tests
1063	>	pool.shutdownNow();
1064	>	pool.awaitTermination(MEDIUM_DELAY_MS, MILLISECONDS);
1065	>	}
1066	>	}
1067	>	} catch (SecurityException ok) {
1068	>	// Allowed in case test doesn't have privs
1069	>	} catch (InterruptedException fail) {
1070	>	threadFail("Unexpected InterruptedException");
1071	>	}
1072	>	}
1073	>
1074	>	/**
1075	>	* Like Runnable, but with the freedom to throw anything.
1076	>	* junit folks had the same idea:
1077	>	* http://junit.org/junit5/docs/snapshot/api/org/junit/gen5/api/Executable.html
1078	>	*/
1079	>	interface Action { public void run() throws Throwable; }
1080	>
1081	>	/**
1082	>	* Runs all the given actions in parallel, failing if any fail.
1083	>	* Useful for running multiple variants of tests that are
1084	>	* necessarily individually slow because they must block.
1085	>	*/
1086	>	void testInParallel(Action ... actions) {
1087	>	ExecutorService pool = Executors.newCachedThreadPool();
1088	>	try (PoolCleaner cleaner = cleaner(pool)) {
1089	>	ArrayList<Future<?>> futures = new ArrayList<>(actions.length);
1090	>	for (final Action action : actions)
1091	>	futures.add(pool.submit(new CheckedRunnable() {
1092	>	public void realRun() throws Throwable { action.run();}}));
1093	>	for (Future<?> future : futures)
1094	>	try {
1095	>	assertNull(future.get(LONG_DELAY_MS, MILLISECONDS));
1096	>	} catch (ExecutionException ex) {
1097	>	threadUnexpectedException(ex.getCause());
1098	>	} catch (Exception ex) {
1099	>	threadUnexpectedException(ex);
1100	>	}
1101	>	}
1102		}
1103
1104	<	public void threadUnexpectedException() {
1105	<	threadFailed = true;
1106	<	fail("Unexpected exception");
1104	>	/** Returns true if thread info might be useful in a thread dump. */
1105	>	static boolean threadOfInterest(ThreadInfo info) {
1106	>	final String name = info.getThreadName();
1107	>	String lockName;
1108	>	if (name == null)
1109	>	return true;
1110	>	if (name.equals("Signal Dispatcher")
1111	>	|| name.equals("WedgedTestDetector"))
1112	>	return false;
1113	>	if (name.equals("Reference Handler")) {
1114	>	// Reference Handler stacktrace changed in JDK-8156500
1115	>	StackTraceElement[] stackTrace; String methodName;
1116	>	if ((stackTrace = info.getStackTrace()) != null
1117	>	&& stackTrace.length > 0
1118	>	&& (methodName = stackTrace[0].getMethodName()) != null
1119	>	&& methodName.equals("waitForReferencePendingList"))
1120	>	return false;
1121	>	// jdk8 Reference Handler stacktrace
1122	>	if ((lockName = info.getLockName()) != null
1123	>	&& lockName.startsWith("java.lang.ref"))
1124	>	return false;
1125	>	}
1126	>	if ((name.equals("Finalizer") || name.equals("Common-Cleaner"))
1127	>	&& (lockName = info.getLockName()) != null
1128	>	&& lockName.startsWith("java.lang.ref"))
1129	>	return false;
1130	>	if (name.startsWith("ForkJoinPool.commonPool-worker")
1131	>	&& (lockName = info.getLockName()) != null
1132	>	&& lockName.startsWith("java.util.concurrent.ForkJoinPool"))
1133	>	return false;
1134	>	return true;
1135		}
1136
1137	+	/**
1138	+	* A debugging tool to print stack traces of most threads, as jstack does.
1139	+	* Uninteresting threads are filtered out.
1140	+	*/
1141	+	static void dumpTestThreads() {
1142	+	SecurityManager sm = System.getSecurityManager();
1143	+	if (sm != null) {
1144	+	try {
1145	+	System.setSecurityManager(null);
1146	+	} catch (SecurityException giveUp) {
1147	+	return;
1148	+	}
1149	+	}
1150	+
1151	+	System.err.println("------ stacktrace dump start ------");
1152	+	for (ThreadInfo info : THREAD_MXBEAN.dumpAllThreads(true, true))
1153	+	if (threadOfInterest(info))
1154	+	System.err.print(info);
1155	+	System.err.println("------ stacktrace dump end ------");
1156	+
1157	+	if (sm != null) System.setSecurityManager(sm);
1158	+	}
1159
1160		/**
1161	<	* Wait out termination of a thread pool or fail doing so
1161	>	* Checks that thread eventually enters the expected blocked thread state.
1162		*/
1163	<	public void joinPool(ExecutorService exec) {
1163	>	void assertThreadBlocks(Thread thread, Thread.State expected) {
1164	>	// always sleep at least 1 ms, with high probability avoiding
1165	>	// transitory states
1166	>	for (long retries = LONG_DELAY_MS * 3 / 4; retries-->0; ) {
1167	>	try { delay(1); }
1168	>	catch (InterruptedException fail) {
1169	>	throw new AssertionError("Unexpected InterruptedException", fail);
1170	>	}
1171	>	Thread.State s = thread.getState();
1172	>	if (s == expected)
1173	>	return;
1174	>	else if (s == Thread.State.TERMINATED)
1175	>	fail("Unexpected thread termination");
1176	>	}
1177	>	fail("timed out waiting for thread to enter thread state " + expected);
1178	>	}
1179	>
1180	>	/**
1181	>	* Returns the thread's blocker's class name, if any, else null.
1182	>	*/
1183	>	String blockerClassName(Thread thread) {
1184	>	ThreadInfo threadInfo; LockInfo lockInfo;
1185	>	if ((threadInfo = THREAD_MXBEAN.getThreadInfo(thread.getId(), 0)) != null
1186	>	&& (lockInfo = threadInfo.getLockInfo()) != null)
1187	>	return lockInfo.getClassName();
1188	>	return null;
1189	>	}
1190	>
1191	>	/**
1192	>	* Checks that future.get times out, with the default timeout of
1193	>	* {@code timeoutMillis()}.
1194	>	*/
1195	>	void assertFutureTimesOut(Future<?> future) {
1196	>	assertFutureTimesOut(future, timeoutMillis());
1197	>	}
1198	>
1199	>	/**
1200	>	* Checks that future.get times out, with the given millisecond timeout.
1201	>	*/
1202	>	void assertFutureTimesOut(Future<?> future, long timeoutMillis) {
1203	>	long startTime = System.nanoTime();
1204		try {
1205	<	exec.shutdown();
1206	<	assertTrue(exec.awaitTermination(LONG_DELAY_MS, TimeUnit.MILLISECONDS));
1207	<	} catch(InterruptedException ie) {
1208	<	fail("Unexpected exception");
1205	>	future.get(timeoutMillis, MILLISECONDS);
1206	>	shouldThrow();
1207	>	} catch (TimeoutException success) {
1208	>	} catch (Exception fail) {
1209	>	threadUnexpectedException(fail);
1210		}
1211	+	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
1212	+	assertFalse(future.isDone());
1213		}
1214
1215	<
1215	>	/**
1216	>	* Fails with message "should throw exception".
1217	>	*/
1218		public void shouldThrow() {
1219		fail("Should throw exception");
1220		}
1221
1222	<	public void unexpectedException() {
1223	<	fail("Unexpected exception");
1222	>	/**
1223	>	* Fails with message "should throw " + exceptionName.
1224	>	*/
1225	>	public void shouldThrow(String exceptionName) {
1226	>	fail("Should throw " + exceptionName);
1227		}
1228
1229	+	/**
1230	+	* The maximum number of consecutive spurious wakeups we should
1231	+	* tolerate (from APIs like LockSupport.park) before failing a test.
1232	+	*/
1233	+	static final int MAX_SPURIOUS_WAKEUPS = 10;
1234
1235		/**
1236		* The number of elements to place in collections, arrays, etc.
1237	+	* Must be at least ten;
1238		*/
1239	<	public static final int SIZE = 20;
1239	>	public static final int SIZE = 32;
1240
1241	<	// Some convenient Integer constants
1241	>	static Item[] seqItems(int size) {
1242	>	Item[] s = new Item[size];
1243	>	for (int i = 0; i < size; ++i)
1244	>	s[i] = new Item(i);
1245	>	return s;
1246	>	}
1247	>	static Item[] negativeSeqItems(int size) {
1248	>	Item[] s = new Item[size];
1249	>	for (int i = 0; i < size; ++i)
1250	>	s[i] = new Item(-i);
1251	>	return s;
1252	>	}
1253	>
1254	>	// Many tests rely on defaultItems all being sequential nonnegative
1255	>	public static final Item[] defaultItems = seqItems(SIZE);
1256	>
1257	>	static Item itemFor(int i) { // check cache for defaultItems
1258	>	Item[] items = defaultItems;
1259	>	return (i >= 0 && i < items.length) ? items[i] : new Item(i);
1260	>	}
1261	>
1262	>	public static final Item zero  = defaultItems[0];
1263	>	public static final Item one   = defaultItems[1];
1264	>	public static final Item two   = defaultItems[2];
1265	>	public static final Item three = defaultItems[3];
1266	>	public static final Item four  = defaultItems[4];
1267	>	public static final Item five  = defaultItems[5];
1268	>	public static final Item six   = defaultItems[6];
1269	>	public static final Item seven = defaultItems[7];
1270	>	public static final Item eight = defaultItems[8];
1271	>	public static final Item nine  = defaultItems[9];
1272	>	public static final Item ten   = defaultItems[10];
1273	>
1274	>	public static final Item[] negativeItems = negativeSeqItems(SIZE);
1275	>
1276	>	public static final Item minusOne   = negativeItems[1];
1277	>	public static final Item minusTwo   = negativeItems[2];
1278	>	public static final Item minusThree = negativeItems[3];
1279	>	public static final Item minusFour  = negativeItems[4];
1280	>	public static final Item minusFive  = negativeItems[5];
1281	>	public static final Item minusSix   = negativeItems[6];
1282	>	public static final Item minusSeven = negativeItems[7];
1283	>	public static final Item minusEight = negativeItems[8];
1284	>	public static final Item minusNone  = negativeItems[9];
1285	>	public static final Item minusTen   = negativeItems[10];
1286	>
1287	>	// elements expected to be missing
1288	>	public static final Item fortytwo = new Item(42);
1289	>	public static final Item eightysix = new Item(86);
1290	>	public static final Item ninetynine = new Item(99);
1291	>
1292	>	// Interop across Item, int
1293	>
1294	>	static void mustEqual(Item x, Item y) {
1295	>	if (x != y)
1296	>	assertEquals(x.value, y.value);
1297	>	}
1298	>	static void mustEqual(Item x, int y) {
1299	>	assertEquals(x.value, y);
1300	>	}
1301	>	static void mustEqual(int x, Item y) {
1302	>	assertEquals(x, y.value);
1303	>	}
1304	>	static void mustEqual(int x, int y) {
1305	>	assertEquals(x, y);
1306	>	}
1307	>	static void mustEqual(Object x, Object y) {
1308	>	if (x != y)
1309	>	assertEquals(x, y);
1310	>	}
1311	>	static void mustEqual(int x, Object y) {
1312	>	if (y instanceof Item)
1313	>	assertEquals(x, ((Item)y).value);
1314	>	else fail();
1315	>	}
1316	>	static void mustEqual(Object x, int y) {
1317	>	if (x instanceof Item)
1318	>	assertEquals(((Item)x).value, y);
1319	>	else fail();
1320	>	}
1321	>	static void mustEqual(boolean x, boolean y) {
1322	>	assertEquals(x, y);
1323	>	}
1324	>	static void mustEqual(long x, long y) {
1325	>	assertEquals(x, y);
1326	>	}
1327	>	static void mustEqual(double x, double y) {
1328	>	assertEquals(x, y);
1329	>	}
1330	>	static void mustContain(Collection<Item> c, int i) {
1331	>	assertTrue(c.contains(itemFor(i)));
1332	>	}
1333	>	static void mustContain(Collection<Item> c, Item i) {
1334	>	assertTrue(c.contains(i));
1335	>	}
1336	>	static void mustNotContain(Collection<Item> c, int i) {
1337	>	assertFalse(c.contains(itemFor(i)));
1338	>	}
1339	>	static void mustNotContain(Collection<Item> c, Item i) {
1340	>	assertFalse(c.contains(i));
1341	>	}
1342	>	static void mustRemove(Collection<Item> c, int i) {
1343	>	assertTrue(c.remove(itemFor(i)));
1344	>	}
1345	>	static void mustRemove(Collection<Item> c, Item i) {
1346	>	assertTrue(c.remove(i));
1347	>	}
1348	>	static void mustNotRemove(Collection<Item> c, int i) {
1349	>	Item[] items = defaultItems;
1350	>	Item x = (i >= 0 && i < items.length) ? items[i] : new Item(i);
1351	>	assertFalse(c.remove(x));
1352	>	}
1353	>	static void mustNotRemove(Collection<Item> c, Item i) {
1354	>	assertFalse(c.remove(i));
1355	>	}
1356	>	static void mustAdd(Collection<Item> c, int i) {
1357	>	assertTrue(c.add(itemFor(i)));
1358	>	}
1359	>	static void mustAdd(Collection<Item> c, Item i) {
1360	>	assertTrue(c.add(i));
1361	>	}
1362	>	static void mustOffer(Queue<Item> c, int i) {
1363	>	assertTrue(c.offer(itemFor(i)));
1364	>	}
1365	>	static void mustOffer(Queue<Item> c, Item i) {
1366	>	assertTrue(c.offer(i));
1367	>	}
1368	>
1369	>	/**
1370	>	* Runs Runnable r with a security policy that permits precisely
1371	>	* the specified permissions.  If there is no current security
1372	>	* manager, the runnable is run twice, both with and without a
1373	>	* security manager.  We require that any security manager permit
1374	>	* getPolicy/setPolicy.
1375	>	*/
1376	>	public void runWithPermissions(Runnable r, Permission... permissions) {
1377	>	SecurityManager sm = System.getSecurityManager();
1378	>	if (sm == null) {
1379	>	r.run();
1380	>	}
1381	>	runWithSecurityManagerWithPermissions(r, permissions);
1382	>	}
1383	>
1384	>	/**
1385	>	* Runs Runnable r with a security policy that permits precisely
1386	>	* the specified permissions.  If there is no current security
1387	>	* manager, a temporary one is set for the duration of the
1388	>	* Runnable.  We require that any security manager permit
1389	>	* getPolicy/setPolicy.
1390	>	*/
1391	>	public void runWithSecurityManagerWithPermissions(Runnable r,
1392	>	Permission... permissions) {
1393	>	SecurityManager sm = System.getSecurityManager();
1394	>	if (sm == null) {
1395	>	Policy savedPolicy = Policy.getPolicy();
1396	>	try {
1397	>	Policy.setPolicy(permissivePolicy());
1398	>	System.setSecurityManager(new SecurityManager());
1399	>	runWithSecurityManagerWithPermissions(r, permissions);
1400	>	} finally {
1401	>	System.setSecurityManager(null);
1402	>	Policy.setPolicy(savedPolicy);
1403	>	}
1404	>	} else {
1405	>	Policy savedPolicy = Policy.getPolicy();
1406	>	AdjustablePolicy policy = new AdjustablePolicy(permissions);
1407	>	Policy.setPolicy(policy);
1408
1409	<	public static final Integer zero = new Integer(0);
1410	<	public static final Integer one = new Integer(1);
1411	<	public static final Integer two = new Integer(2);
1412	<	public static final Integer three  = new Integer(3);
1413	<	public static final Integer four  = new Integer(4);
1414	<	public static final Integer five  = new Integer(5);
1415	<	public static final Integer six = new Integer(6);
1416	<	public static final Integer seven = new Integer(7);
185	<	public static final Integer eight = new Integer(8);
186	<	public static final Integer nine = new Integer(9);
187	<	public static final Integer m1  = new Integer(-1);
188	<	public static final Integer m2  = new Integer(-2);
189	<	public static final Integer m3  = new Integer(-3);
190	<	public static final Integer m4 = new Integer(-4);
191	<	public static final Integer m5 = new Integer(-5);
192	<	public static final Integer m10 = new Integer(-10);
1409	>	try {
1410	>	r.run();
1411	>	} finally {
1412	>	policy.addPermission(new SecurityPermission("setPolicy"));
1413	>	Policy.setPolicy(savedPolicy);
1414	>	}
1415	>	}
1416	>	}
1417
1418	+	/**
1419	+	* Runs a runnable without any permissions.
1420	+	*/
1421	+	public void runWithoutPermissions(Runnable r) {
1422	+	runWithPermissions(r);
1423	+	}
1424
1425	<	// Some convenient Runnable classes
1425	>	/**
1426	>	* A security policy where new permissions can be dynamically added
1427	>	* or all cleared.
1428	>	*/
1429	>	public static class AdjustablePolicy extends java.security.Policy {
1430	>	Permissions perms = new Permissions();
1431	>	AdjustablePolicy(Permission... permissions) {
1432	>	for (Permission permission : permissions)
1433	>	perms.add(permission);
1434	>	}
1435	>	void addPermission(Permission perm) { perms.add(perm); }
1436	>	void clearPermissions() { perms = new Permissions(); }
1437	>	public PermissionCollection getPermissions(CodeSource cs) {
1438	>	return perms;
1439	>	}
1440	>	public PermissionCollection getPermissions(ProtectionDomain pd) {
1441	>	return perms;
1442	>	}
1443	>	public boolean implies(ProtectionDomain pd, Permission p) {
1444	>	return perms.implies(p);
1445	>	}
1446	>	public void refresh() {}
1447	>	public String toString() {
1448	>	List<Permission> ps = new ArrayList<>();
1449	>	for (Enumeration<Permission> e = perms.elements(); e.hasMoreElements();)
1450	>	ps.add(e.nextElement());
1451	>	return "AdjustablePolicy with permissions " + ps;
1452	>	}
1453	>	}
1454
1455	<	public static class NoOpRunnable implements Runnable {
1456	<	public void run() {}
1455	>	/**
1456	>	* Returns a policy containing all the permissions we ever need.
1457	>	*/
1458	>	public static Policy permissivePolicy() {
1459	>	return new AdjustablePolicy
1460	>	// Permissions j.u.c. needs directly
1461	>	(new RuntimePermission("modifyThread"),
1462	>	new RuntimePermission("getClassLoader"),
1463	>	new RuntimePermission("setContextClassLoader"),
1464	>	// Permissions needed to change permissions!
1465	>	new SecurityPermission("getPolicy"),
1466	>	new SecurityPermission("setPolicy"),
1467	>	new RuntimePermission("setSecurityManager"),
1468	>	// Permissions needed by the junit test harness
1469	>	new RuntimePermission("accessDeclaredMembers"),
1470	>	new PropertyPermission("*", "read"),
1471	>	new java.io.FilePermission("<<ALL FILES>>", "read"));
1472		}
1473
1474	<	public static class NoOpCallable implements Callable {
1475	<	public Object call() { return Boolean.TRUE; }
1474	>	/**
1475	>	* Sleeps until the given time has elapsed.
1476	>	* Throws AssertionError if interrupted.
1477	>	*/
1478	>	static void sleep(long millis) {
1479	>	try {
1480	>	delay(millis);
1481	>	} catch (InterruptedException fail) {
1482	>	throw new AssertionError("Unexpected InterruptedException", fail);
1483	>	}
1484		}
1485
1486	<	public class ShortRunnable implements Runnable {
1487	<	public void run() {
1488	<	try {
1489	<	Thread.sleep(SHORT_DELAY_MS);
1486	>	/**
1487	>	* Spin-waits up to the specified number of milliseconds for the given
1488	>	* thread to enter a wait state: BLOCKED, WAITING, or TIMED_WAITING.
1489	>	* @param waitingForGodot if non-null, an additional condition to satisfy
1490	>	*/
1491	>	void waitForThreadToEnterWaitState(Thread thread, long timeoutMillis,
1492	>	Callable<Boolean> waitingForGodot) {
1493	>	for (long startTime = 0L;;) {
1494	>	switch (thread.getState()) {
1495	>	default: break;
1496	>	case BLOCKED: case WAITING: case TIMED_WAITING:
1497	>	try {
1498	>	if (waitingForGodot == null || waitingForGodot.call())
1499	>	return;
1500	>	} catch (Throwable fail) { threadUnexpectedException(fail); }
1501	>	break;
1502	>	case TERMINATED:
1503	>	fail("Unexpected thread termination");
1504		}
1505	<	catch(Exception e) {
1506	<	threadUnexpectedException();
1505	>
1506	>	if (startTime == 0L)
1507	>	startTime = System.nanoTime();
1508	>	else if (millisElapsedSince(startTime) > timeoutMillis) {
1509	>	assertTrue(thread.isAlive());
1510	>	if (waitingForGodot == null
1511	>	|| thread.getState() == Thread.State.RUNNABLE)
1512	>	fail("timed out waiting for thread to enter wait state");
1513	>	else
1514	>	fail("timed out waiting for condition, thread state="
1515	>	+ thread.getState());
1516		}
1517	+	Thread.yield();
1518		}
1519		}
1520
1521	<	public class ShortInterruptedRunnable implements Runnable {
1522	<	public void run() {
1521	>	/**
1522	>	* Spin-waits up to the specified number of milliseconds for the given
1523	>	* thread to enter a wait state: BLOCKED, WAITING, or TIMED_WAITING.
1524	>	*/
1525	>	void waitForThreadToEnterWaitState(Thread thread, long timeoutMillis) {
1526	>	waitForThreadToEnterWaitState(thread, timeoutMillis, null);
1527	>	}
1528	>
1529	>	/**
1530	>	* Spin-waits up to LONG_DELAY_MS milliseconds for the given thread to
1531	>	* enter a wait state: BLOCKED, WAITING, or TIMED_WAITING.
1532	>	*/
1533	>	void waitForThreadToEnterWaitState(Thread thread) {
1534	>	waitForThreadToEnterWaitState(thread, LONG_DELAY_MS, null);
1535	>	}
1536	>
1537	>	/**
1538	>	* Spin-waits up to LONG_DELAY_MS milliseconds for the given thread to
1539	>	* enter a wait state: BLOCKED, WAITING, or TIMED_WAITING,
1540	>	* and additionally satisfy the given condition.
1541	>	*/
1542	>	void waitForThreadToEnterWaitState(Thread thread,
1543	>	Callable<Boolean> waitingForGodot) {
1544	>	waitForThreadToEnterWaitState(thread, LONG_DELAY_MS, waitingForGodot);
1545	>	}
1546	>
1547	>	/**
1548	>	* Spin-waits up to LONG_DELAY_MS milliseconds for the current thread to
1549	>	* be interrupted.  Clears the interrupt status before returning.
1550	>	*/
1551	>	void awaitInterrupted() {
1552	>	for (long startTime = 0L; !Thread.interrupted(); ) {
1553	>	if (startTime == 0L)
1554	>	startTime = System.nanoTime();
1555	>	else if (millisElapsedSince(startTime) > LONG_DELAY_MS)
1556	>	fail("timed out waiting for thread interrupt");
1557	>	Thread.yield();
1558	>	}
1559	>	}
1560	>
1561	>	/**
1562	>	* Returns the number of milliseconds since time given by
1563	>	* startNanoTime, which must have been previously returned from a
1564	>	* call to {@link System#nanoTime()}.
1565	>	*/
1566	>	static long millisElapsedSince(long startNanoTime) {
1567	>	return NANOSECONDS.toMillis(System.nanoTime() - startNanoTime);
1568	>	}
1569	>
1570	>	/**
1571	>	* Checks that timed f.get() returns the expected value, and does not
1572	>	* wait for the timeout to elapse before returning.
1573	>	*/
1574	>	<T> void checkTimedGet(Future<T> f, T expectedValue, long timeoutMillis) {
1575	>	long startTime = System.nanoTime();
1576	>	T actual = null;
1577	>	try {
1578	>	actual = f.get(timeoutMillis, MILLISECONDS);
1579	>	} catch (Throwable fail) { threadUnexpectedException(fail); }
1580	>	assertEquals(expectedValue, actual);
1581	>	if (millisElapsedSince(startTime) > timeoutMillis/2)
1582	>	throw new AssertionError("timed get did not return promptly");
1583	>	}
1584	>
1585	>	<T> void checkTimedGet(Future<T> f, T expectedValue) {
1586	>	checkTimedGet(f, expectedValue, LONG_DELAY_MS);
1587	>	}
1588	>
1589	>	/**
1590	>	* Returns a new started daemon Thread running the given runnable.
1591	>	*/
1592	>	Thread newStartedThread(Runnable runnable) {
1593	>	Thread t = new Thread(runnable);
1594	>	t.setDaemon(true);
1595	>	t.start();
1596	>	return t;
1597	>	}
1598	>
1599	>	/**
1600	>	* Returns a new started daemon Thread running the given action,
1601	>	* wrapped in a CheckedRunnable.
1602	>	*/
1603	>	Thread newStartedThread(Action action) {
1604	>	return newStartedThread(checkedRunnable(action));
1605	>	}
1606	>
1607	>	/**
1608	>	* Waits for the specified time (in milliseconds) for the thread
1609	>	* to terminate (using {@link Thread#join(long)}), else interrupts
1610	>	* the thread (in the hope that it may terminate later) and fails.
1611	>	*/
1612	>	void awaitTermination(Thread thread, long timeoutMillis) {
1613	>	try {
1614	>	thread.join(timeoutMillis);
1615	>	} catch (InterruptedException fail) {
1616	>	threadUnexpectedException(fail);
1617	>	}
1618	>	if (thread.getState() != Thread.State.TERMINATED) {
1619	>	String detail = String.format(
1620	>	"timed out waiting for thread to terminate, thread=%s, state=%s" ,
1621	>	thread, thread.getState());
1622		try {
1623	<	Thread.sleep(SHORT_DELAY_MS);
1624	<	threadShouldThrow();
1625	<	}
1626	<	catch(InterruptedException success) {
1623	>	threadFail(detail);
1624	>	} finally {
1625	>	// Interrupt thread __after__ having reported its stack trace
1626	>	thread.interrupt();
1627		}
1628		}
1629		}
1630
1631	<	public class SmallRunnable implements Runnable {
1632	<	public void run() {
1631	>	/**
1632	>	* Waits for LONG_DELAY_MS milliseconds for the thread to
1633	>	* terminate (using {@link Thread#join(long)}), else interrupts
1634	>	* the thread (in the hope that it may terminate later) and fails.
1635	>	*/
1636	>	void awaitTermination(Thread t) {
1637	>	awaitTermination(t, LONG_DELAY_MS);
1638	>	}
1639	>
1640	>	// Some convenient Runnable classes
1641	>
1642	>	public abstract class CheckedRunnable implements Runnable {
1643	>	protected abstract void realRun() throws Throwable;
1644	>
1645	>	public final void run() {
1646		try {
1647	<	Thread.sleep(SMALL_DELAY_MS);
1648	<	}
1649	<	catch(Exception e) {
233	<	threadUnexpectedException();
1647	>	realRun();
1648	>	} catch (Throwable fail) {
1649	>	threadUnexpectedException(fail);
1650		}
1651		}
1652		}
1653
1654	<	public class SmallCallable implements Callable {
1655	<	public Object call() {
1654	>	Runnable checkedRunnable(Action action) {
1655	>	return new CheckedRunnable() {
1656	>	public void realRun() throws Throwable {
1657	>	action.run();
1658	>	}};
1659	>	}
1660	>
1661	>	public abstract class ThreadShouldThrow extends Thread {
1662	>	protected abstract void realRun() throws Throwable;
1663	>
1664	>	final Class<?> exceptionClass;
1665	>
1666	>	<T extends Throwable> ThreadShouldThrow(Class<T> exceptionClass) {
1667	>	this.exceptionClass = exceptionClass;
1668	>	}
1669	>
1670	>	public final void run() {
1671		try {
1672	<	Thread.sleep(SMALL_DELAY_MS);
1672	>	realRun();
1673	>	} catch (Throwable t) {
1674	>	if (! exceptionClass.isInstance(t))
1675	>	threadUnexpectedException(t);
1676	>	return;
1677		}
1678	<	catch(Exception e) {
244	<	threadUnexpectedException();
245	<	}
246	<	return Boolean.TRUE;
1678	>	threadShouldThrow(exceptionClass.getSimpleName());
1679		}
1680		}
1681
1682	<	public class SmallInterruptedRunnable implements Runnable {
1683	<	public void run() {
1682	>	public abstract class CheckedInterruptedRunnable implements Runnable {
1683	>	protected abstract void realRun() throws Throwable;
1684	>
1685	>	public final void run() {
1686		try {
1687	<	Thread.sleep(SMALL_DELAY_MS);
1688	<	threadShouldThrow();
1687	>	realRun();
1688	>	} catch (InterruptedException success) {
1689	>	threadAssertFalse(Thread.interrupted());
1690	>	return;
1691	>	} catch (Throwable fail) {
1692	>	threadUnexpectedException(fail);
1693		}
1694	<	catch(InterruptedException success) {
1694	>	threadShouldThrow("InterruptedException");
1695	>	}
1696	>	}
1697	>
1698	>	public abstract class CheckedCallable<T> implements Callable<T> {
1699	>	protected abstract T realCall() throws Throwable;
1700	>
1701	>	public final T call() {
1702	>	try {
1703	>	return realCall();
1704	>	} catch (Throwable fail) {
1705	>	threadUnexpectedException(fail);
1706		}
1707	+	throw new AssertionError("unreached");
1708		}
1709		}
1710
1711	+	public static class NoOpRunnable implements Runnable {
1712	+	public void run() {}
1713	+	}
1714	+
1715	+	public static class NoOpCallable implements Callable<Object> {
1716	+	public Object call() { return Boolean.TRUE; }
1717	+	}
1718	+
1719	+	public static final String TEST_STRING = "a test string";
1720	+
1721	+	public static class StringTask implements Callable<String> {
1722	+	final String value;
1723	+	public StringTask() { this(TEST_STRING); }
1724	+	public StringTask(String value) { this.value = value; }
1725	+	public String call() { return value; }
1726	+	}
1727	+
1728	+	public Callable<String> latchAwaitingStringTask(final CountDownLatch latch) {
1729	+	return new CheckedCallable<String>() {
1730	+	protected String realCall() {
1731	+	try {
1732	+	latch.await();
1733	+	} catch (InterruptedException quittingTime) {}
1734	+	return TEST_STRING;
1735	+	}};
1736	+	}
1737	+
1738	+	public Runnable countDowner(final CountDownLatch latch) {
1739	+	return new CheckedRunnable() {
1740	+	public void realRun() throws InterruptedException {
1741	+	latch.countDown();
1742	+	}};
1743	+	}
1744	+
1745	+	class LatchAwaiter extends CheckedRunnable {
1746	+	static final int NEW = 0;
1747	+	static final int RUNNING = 1;
1748	+	static final int DONE = 2;
1749	+	final CountDownLatch latch;
1750	+	int state = NEW;
1751	+	LatchAwaiter(CountDownLatch latch) { this.latch = latch; }
1752	+	public void realRun() throws InterruptedException {
1753	+	state = 1;
1754	+	await(latch);
1755	+	state = 2;
1756	+	}
1757	+	}
1758	+
1759	+	public LatchAwaiter awaiter(CountDownLatch latch) {
1760	+	return new LatchAwaiter(latch);
1761	+	}
1762	+
1763	+	public void await(CountDownLatch latch, long timeoutMillis) {
1764	+	boolean timedOut = false;
1765	+	try {
1766	+	timedOut = !latch.await(timeoutMillis, MILLISECONDS);
1767	+	} catch (Throwable fail) {
1768	+	threadUnexpectedException(fail);
1769	+	}
1770	+	if (timedOut)
1771	+	fail("timed out waiting for CountDownLatch for "
1772	+	+ (timeoutMillis/1000) + " sec");
1773	+	}
1774	+
1775	+	public void await(CountDownLatch latch) {
1776	+	await(latch, LONG_DELAY_MS);
1777	+	}
1778	+
1779	+	public void await(Semaphore semaphore) {
1780	+	boolean timedOut = false;
1781	+	try {
1782	+	timedOut = !semaphore.tryAcquire(LONG_DELAY_MS, MILLISECONDS);
1783	+	} catch (Throwable fail) {
1784	+	threadUnexpectedException(fail);
1785	+	}
1786	+	if (timedOut)
1787	+	fail("timed out waiting for Semaphore for "
1788	+	+ (LONG_DELAY_MS/1000) + " sec");
1789	+	}
1790	+
1791	+	public void await(CyclicBarrier barrier) {
1792	+	try {
1793	+	barrier.await(LONG_DELAY_MS, MILLISECONDS);
1794	+	} catch (Throwable fail) {
1795	+	threadUnexpectedException(fail);
1796	+	}
1797	+	}
1798	+
1799	+	//     /**
1800	+	//      * Spin-waits up to LONG_DELAY_MS until flag becomes true.
1801	+	//      */
1802	+	//     public void await(AtomicBoolean flag) {
1803	+	//         await(flag, LONG_DELAY_MS);
1804	+	//     }
1805	+
1806	+	//     /**
1807	+	//      * Spin-waits up to the specified timeout until flag becomes true.
1808	+	//      */
1809	+	//     public void await(AtomicBoolean flag, long timeoutMillis) {
1810	+	//         long startTime = System.nanoTime();
1811	+	//         while (!flag.get()) {
1812	+	//             if (millisElapsedSince(startTime) > timeoutMillis)
1813	+	//                 throw new AssertionError("timed out");
1814	+	//             Thread.yield();
1815	+	//         }
1816	+	//     }
1817	+
1818	+	public static class NPETask implements Callable<String> {
1819	+	public String call() { throw new NullPointerException(); }
1820	+	}
1821	+
1822	+	public Runnable possiblyInterruptedRunnable(final long timeoutMillis) {
1823	+	return new CheckedRunnable() {
1824	+	protected void realRun() {
1825	+	try {
1826	+	delay(timeoutMillis);
1827	+	} catch (InterruptedException ok) {}
1828	+	}};
1829	+	}
1830	+
1831	+	/**
1832	+	* For use as ThreadFactory in constructors
1833	+	*/
1834	+	public static class SimpleThreadFactory implements ThreadFactory {
1835	+	public Thread newThread(Runnable r) {
1836	+	return new Thread(r);
1837	+	}
1838	+	}
1839	+
1840	+	public interface TrackedRunnable extends Runnable {
1841	+	boolean isDone();
1842	+	}
1843
1844	<	public class MediumRunnable implements Runnable {
1844	>	public static class TrackedNoOpRunnable implements Runnable {
1845	>	public volatile boolean done = false;
1846		public void run() {
1847	+	done = true;
1848	+	}
1849	+	}
1850	+
1851	+	/**
1852	+	* Analog of CheckedRunnable for RecursiveAction
1853	+	*/
1854	+	public abstract class CheckedRecursiveAction extends RecursiveAction {
1855	+	protected abstract void realCompute() throws Throwable;
1856	+
1857	+	@Override protected final void compute() {
1858		try {
1859	<	Thread.sleep(MEDIUM_DELAY_MS);
1860	<	}
1861	<	catch(Exception e) {
268	<	threadUnexpectedException();
1859	>	realCompute();
1860	>	} catch (Throwable fail) {
1861	>	threadUnexpectedException(fail);
1862		}
1863		}
1864		}
1865
1866	<	public class MediumInterruptedRunnable implements Runnable {
1867	<	public void run() {
1866	>	/**
1867	>	* Analog of CheckedCallable for RecursiveTask
1868	>	*/
1869	>	public abstract class CheckedRecursiveTask<T> extends RecursiveTask<T> {
1870	>	protected abstract T realCompute() throws Throwable;
1871	>
1872	>	@Override protected final T compute() {
1873		try {
1874	<	Thread.sleep(MEDIUM_DELAY_MS);
1875	<	threadShouldThrow();
1874	>	return realCompute();
1875	>	} catch (Throwable fail) {
1876	>	threadUnexpectedException(fail);
1877		}
1878	<	catch(InterruptedException success) {
1878	>	throw new AssertionError("unreached");
1879	>	}
1880	>	}
1881	>
1882	>	/**
1883	>	* For use as RejectedExecutionHandler in constructors
1884	>	*/
1885	>	public static class NoOpREHandler implements RejectedExecutionHandler {
1886	>	public void rejectedExecution(Runnable r,
1887	>	ThreadPoolExecutor executor) {}
1888	>	}
1889	>
1890	>	/**
1891	>	* A CyclicBarrier that uses timed await and fails with
1892	>	* AssertionErrors instead of throwing checked exceptions.
1893	>	*/
1894	>	public static class CheckedBarrier extends CyclicBarrier {
1895	>	public CheckedBarrier(int parties) { super(parties); }
1896	>
1897	>	public int await() {
1898	>	try {
1899	>	return super.await(LONGER_DELAY_MS, MILLISECONDS);
1900	>	} catch (TimeoutException timedOut) {
1901	>	throw new AssertionError("timed out");
1902	>	} catch (Exception fail) {
1903	>	throw new AssertionError("Unexpected exception: " + fail, fail);
1904		}
1905		}
1906		}
1907
1908	<	public class MediumPossiblyInterruptedRunnable implements Runnable {
1909	<	public void run() {
1908	>	void checkEmpty(BlockingQueue<?> q) {
1909	>	try {
1910	>	assertTrue(q.isEmpty());
1911	>	assertEquals(0, q.size());
1912	>	assertNull(q.peek());
1913	>	assertNull(q.poll());
1914	>	assertNull(q.poll(randomExpiredTimeout(), randomTimeUnit()));
1915	>	assertEquals(q.toString(), "[]");
1916	>	assertTrue(Arrays.equals(q.toArray(), new Object[0]));
1917	>	assertFalse(q.iterator().hasNext());
1918	>	try {
1919	>	q.element();
1920	>	shouldThrow();
1921	>	} catch (NoSuchElementException success) {}
1922		try {
1923	<	Thread.sleep(MEDIUM_DELAY_MS);
1923	>	q.iterator().next();
1924	>	shouldThrow();
1925	>	} catch (NoSuchElementException success) {}
1926	>	try {
1927	>	q.remove();
1928	>	shouldThrow();
1929	>	} catch (NoSuchElementException success) {}
1930	>	} catch (InterruptedException fail) { threadUnexpectedException(fail); }
1931	>	}
1932	>
1933	>	void assertSerialEquals(Object x, Object y) {
1934	>	assertTrue(Arrays.equals(serialBytes(x), serialBytes(y)));
1935	>	}
1936	>
1937	>	void assertNotSerialEquals(Object x, Object y) {
1938	>	assertFalse(Arrays.equals(serialBytes(x), serialBytes(y)));
1939	>	}
1940	>
1941	>	byte[] serialBytes(Object o) {
1942	>	try {
1943	>	ByteArrayOutputStream bos = new ByteArrayOutputStream();
1944	>	ObjectOutputStream oos = new ObjectOutputStream(bos);
1945	>	oos.writeObject(o);
1946	>	oos.flush();
1947	>	oos.close();
1948	>	return bos.toByteArray();
1949	>	} catch (Throwable fail) {
1950	>	threadUnexpectedException(fail);
1951	>	return new byte[0];
1952	>	}
1953	>	}
1954	>
1955	>	@SuppressWarnings("unchecked")
1956	>	void assertImmutable(Object o) {
1957	>	if (o instanceof Collection) {
1958	>	assertThrows(
1959	>	UnsupportedOperationException.class,
1960	>	() -> ((Collection) o).add(null));
1961	>	}
1962	>	}
1963	>
1964	>	@SuppressWarnings("unchecked")
1965	>	<T> T serialClone(T o) {
1966	>	T clone = null;
1967	>	try {
1968	>	ObjectInputStream ois = new ObjectInputStream
1969	>	(new ByteArrayInputStream(serialBytes(o)));
1970	>	clone = (T) ois.readObject();
1971	>	} catch (Throwable fail) {
1972	>	threadUnexpectedException(fail);
1973	>	}
1974	>	if (o == clone) assertImmutable(o);
1975	>	else assertSame(o.getClass(), clone.getClass());
1976	>	return clone;
1977	>	}
1978	>
1979	>	/**
1980	>	* A version of serialClone that leaves error handling (for
1981	>	* e.g. NotSerializableException) up to the caller.
1982	>	*/
1983	>	@SuppressWarnings("unchecked")
1984	>	<T> T serialClonePossiblyFailing(T o)
1985	>	throws ReflectiveOperationException, java.io.IOException {
1986	>	ByteArrayOutputStream bos = new ByteArrayOutputStream();
1987	>	ObjectOutputStream oos = new ObjectOutputStream(bos);
1988	>	oos.writeObject(o);
1989	>	oos.flush();
1990	>	oos.close();
1991	>	ObjectInputStream ois = new ObjectInputStream
1992	>	(new ByteArrayInputStream(bos.toByteArray()));
1993	>	T clone = (T) ois.readObject();
1994	>	if (o == clone) assertImmutable(o);
1995	>	else assertSame(o.getClass(), clone.getClass());
1996	>	return clone;
1997	>	}
1998	>
1999	>	/**
2000	>	* If o implements Cloneable and has a public clone method,
2001	>	* returns a clone of o, else null.
2002	>	*/
2003	>	@SuppressWarnings("unchecked")
2004	>	<T> T cloneableClone(T o) {
2005	>	if (!(o instanceof Cloneable)) return null;
2006	>	final T clone;
2007	>	try {
2008	>	clone = (T) o.getClass().getMethod("clone").invoke(o);
2009	>	} catch (NoSuchMethodException ok) {
2010	>	return null;
2011	>	} catch (ReflectiveOperationException unexpected) {
2012	>	throw new Error(unexpected);
2013	>	}
2014	>	assertNotSame(o, clone); // not 100% guaranteed by spec
2015	>	assertSame(o.getClass(), clone.getClass());
2016	>	return clone;
2017	>	}
2018	>
2019	>	public void assertThrows(Class<? extends Throwable> expectedExceptionClass,
2020	>	Action... throwingActions) {
2021	>	for (Action throwingAction : throwingActions) {
2022	>	boolean threw = false;
2023	>	try { throwingAction.run(); }
2024	>	catch (Throwable t) {
2025	>	threw = true;
2026	>	if (!expectedExceptionClass.isInstance(t))
2027	>	throw new AssertionError(
2028	>	"Expected " + expectedExceptionClass.getName() +
2029	>	", got " + t.getClass().getName(),
2030	>	t);
2031		}
2032	<	catch(InterruptedException success) {
2032	>	if (!threw)
2033	>	shouldThrow(expectedExceptionClass.getName());
2034	>	}
2035	>	}
2036	>
2037	>	public void assertIteratorExhausted(Iterator<?> it) {
2038	>	try {
2039	>	it.next();
2040	>	shouldThrow();
2041	>	} catch (NoSuchElementException success) {}
2042	>	assertFalse(it.hasNext());
2043	>	}
2044	>
2045	>	public <T> Callable<T> callableThrowing(final Exception ex) {
2046	>	return new Callable<T>() { public T call() throws Exception { throw ex; }};
2047	>	}
2048	>
2049	>	public Runnable runnableThrowing(final RuntimeException ex) {
2050	>	return new Runnable() { public void run() { throw ex; }};
2051	>	}
2052	>
2053	>	/** A reusable thread pool to be shared by tests. */
2054	>	static final ExecutorService cachedThreadPool =
2055	>	new ThreadPoolExecutor(0, Integer.MAX_VALUE,
2056	>	1000L, MILLISECONDS,
2057	>	new SynchronousQueue<Runnable>());
2058	>
2059	>	static <T> void shuffle(T[] array) {
2060	>	Collections.shuffle(Arrays.asList(array), ThreadLocalRandom.current());
2061	>	}
2062	>
2063	>	/**
2064	>	* Returns the same String as would be returned by {@link
2065	>	* Object#toString}, whether or not the given object's class
2066	>	* overrides toString().
2067	>	*
2068	>	* @see System#identityHashCode
2069	>	*/
2070	>	static String identityString(Object x) {
2071	>	return x.getClass().getName()
2072	>	+ "@" + Integer.toHexString(System.identityHashCode(x));
2073	>	}
2074	>
2075	>	// --- Shared assertions for Executor tests ---
2076	>
2077	>	/**
2078	>	* Returns maximum number of tasks that can be submitted to given
2079	>	* pool (with bounded queue) before saturation (when submission
2080	>	* throws RejectedExecutionException).
2081	>	*/
2082	>	static final int saturatedSize(ThreadPoolExecutor pool) {
2083	>	BlockingQueue<Runnable> q = pool.getQueue();
2084	>	return pool.getMaximumPoolSize() + q.size() + q.remainingCapacity();
2085	>	}
2086	>
2087	>	@SuppressWarnings("FutureReturnValueIgnored")
2088	>	void assertNullTaskSubmissionThrowsNullPointerException(Executor e) {
2089	>	try {
2090	>	e.execute((Runnable) null);
2091	>	shouldThrow();
2092	>	} catch (NullPointerException success) {}
2093	>
2094	>	if (! (e instanceof ExecutorService)) return;
2095	>	ExecutorService es = (ExecutorService) e;
2096	>	try {
2097	>	es.submit((Runnable) null);
2098	>	shouldThrow();
2099	>	} catch (NullPointerException success) {}
2100	>	try {
2101	>	es.submit((Runnable) null, Boolean.TRUE);
2102	>	shouldThrow();
2103	>	} catch (NullPointerException success) {}
2104	>	try {
2105	>	es.submit((Callable<?>) null);
2106	>	shouldThrow();
2107	>	} catch (NullPointerException success) {}
2108	>
2109	>	if (! (e instanceof ScheduledExecutorService)) return;
2110	>	ScheduledExecutorService ses = (ScheduledExecutorService) e;
2111	>	try {
2112	>	ses.schedule((Runnable) null,
2113	>	randomTimeout(), randomTimeUnit());
2114	>	shouldThrow();
2115	>	} catch (NullPointerException success) {}
2116	>	try {
2117	>	ses.schedule((Callable<?>) null,
2118	>	randomTimeout(), randomTimeUnit());
2119	>	shouldThrow();
2120	>	} catch (NullPointerException success) {}
2121	>	try {
2122	>	ses.scheduleAtFixedRate((Runnable) null,
2123	>	randomTimeout(), LONG_DELAY_MS, MILLISECONDS);
2124	>	shouldThrow();
2125	>	} catch (NullPointerException success) {}
2126	>	try {
2127	>	ses.scheduleWithFixedDelay((Runnable) null,
2128	>	randomTimeout(), LONG_DELAY_MS, MILLISECONDS);
2129	>	shouldThrow();
2130	>	} catch (NullPointerException success) {}
2131	>	}
2132	>
2133	>	void setRejectedExecutionHandler(
2134	>	ThreadPoolExecutor p, RejectedExecutionHandler handler) {
2135	>	p.setRejectedExecutionHandler(handler);
2136	>	assertSame(handler, p.getRejectedExecutionHandler());
2137	>	}
2138	>
2139	>	void assertTaskSubmissionsAreRejected(ThreadPoolExecutor p) {
2140	>	final RejectedExecutionHandler savedHandler = p.getRejectedExecutionHandler();
2141	>	final long savedTaskCount = p.getTaskCount();
2142	>	final long savedCompletedTaskCount = p.getCompletedTaskCount();
2143	>	final int savedQueueSize = p.getQueue().size();
2144	>	final boolean stock = (p.getClass().getClassLoader() == null);
2145	>
2146	>	Runnable r = () -> {};
2147	>	Callable<Boolean> c = () -> Boolean.TRUE;
2148	>
2149	>	class Recorder implements RejectedExecutionHandler {
2150	>	public volatile Runnable r = null;
2151	>	public volatile ThreadPoolExecutor p = null;
2152	>	public void reset() { r = null; p = null; }
2153	>	public void rejectedExecution(Runnable r, ThreadPoolExecutor p) {
2154	>	assertNull(this.r);
2155	>	assertNull(this.p);
2156	>	this.r = r;
2157	>	this.p = p;
2158	>	}
2159	>	}
2160	>
2161	>	// check custom handler is invoked exactly once per task
2162	>	Recorder recorder = new Recorder();
2163	>	setRejectedExecutionHandler(p, recorder);
2164	>	for (int i = 2; i--> 0; ) {
2165	>	recorder.reset();
2166	>	p.execute(r);
2167	>	if (stock && p.getClass() == ThreadPoolExecutor.class)
2168	>	assertSame(r, recorder.r);
2169	>	assertSame(p, recorder.p);
2170	>
2171	>	recorder.reset();
2172	>	assertFalse(p.submit(r).isDone());
2173	>	if (stock) assertTrue(!((FutureTask) recorder.r).isDone());
2174	>	assertSame(p, recorder.p);
2175	>
2176	>	recorder.reset();
2177	>	assertFalse(p.submit(r, Boolean.TRUE).isDone());
2178	>	if (stock) assertTrue(!((FutureTask) recorder.r).isDone());
2179	>	assertSame(p, recorder.p);
2180	>
2181	>	recorder.reset();
2182	>	assertFalse(p.submit(c).isDone());
2183	>	if (stock) assertTrue(!((FutureTask) recorder.r).isDone());
2184	>	assertSame(p, recorder.p);
2185	>
2186	>	if (p instanceof ScheduledExecutorService) {
2187	>	ScheduledExecutorService s = (ScheduledExecutorService) p;
2188	>	ScheduledFuture<?> future;
2189	>
2190	>	recorder.reset();
2191	>	future = s.schedule(r, randomTimeout(), randomTimeUnit());
2192	>	assertFalse(future.isDone());
2193	>	if (stock) assertTrue(!((FutureTask) recorder.r).isDone());
2194	>	assertSame(p, recorder.p);
2195	>
2196	>	recorder.reset();
2197	>	future = s.schedule(c, randomTimeout(), randomTimeUnit());
2198	>	assertFalse(future.isDone());
2199	>	if (stock) assertTrue(!((FutureTask) recorder.r).isDone());
2200	>	assertSame(p, recorder.p);
2201	>
2202	>	recorder.reset();
2203	>	future = s.scheduleAtFixedRate(r, randomTimeout(), LONG_DELAY_MS, MILLISECONDS);
2204	>	assertFalse(future.isDone());
2205	>	if (stock) assertTrue(!((FutureTask) recorder.r).isDone());
2206	>	assertSame(p, recorder.p);
2207	>
2208	>	recorder.reset();
2209	>	future = s.scheduleWithFixedDelay(r, randomTimeout(), LONG_DELAY_MS, MILLISECONDS);
2210	>	assertFalse(future.isDone());
2211	>	if (stock) assertTrue(!((FutureTask) recorder.r).isDone());
2212	>	assertSame(p, recorder.p);
2213	>	}
2214	>	}
2215	>
2216	>	// Checking our custom handler above should be sufficient, but
2217	>	// we add some integration tests of standard handlers.
2218	>	final AtomicReference<Thread> thread = new AtomicReference<>();
2219	>	final Runnable setThread = () -> thread.set(Thread.currentThread());
2220	>
2221	>	setRejectedExecutionHandler(p, new ThreadPoolExecutor.AbortPolicy());
2222	>	try {
2223	>	p.execute(setThread);
2224	>	shouldThrow();
2225	>	} catch (RejectedExecutionException success) {}
2226	>	assertNull(thread.get());
2227	>
2228	>	setRejectedExecutionHandler(p, new ThreadPoolExecutor.DiscardPolicy());
2229	>	p.execute(setThread);
2230	>	assertNull(thread.get());
2231	>
2232	>	setRejectedExecutionHandler(p, new ThreadPoolExecutor.CallerRunsPolicy());
2233	>	p.execute(setThread);
2234	>	if (p.isShutdown())
2235	>	assertNull(thread.get());
2236	>	else
2237	>	assertSame(Thread.currentThread(), thread.get());
2238	>
2239	>	setRejectedExecutionHandler(p, savedHandler);
2240	>
2241	>	// check that pool was not perturbed by handlers
2242	>	assertEquals(savedTaskCount, p.getTaskCount());
2243	>	assertEquals(savedCompletedTaskCount, p.getCompletedTaskCount());
2244	>	assertEquals(savedQueueSize, p.getQueue().size());
2245	>	}
2246	>
2247	>	void assertCollectionsEquals(Collection<?> x, Collection<?> y) {
2248	>	assertEquals(x, y);
2249	>	assertEquals(y, x);
2250	>	assertEquals(x.isEmpty(), y.isEmpty());
2251	>	assertEquals(x.size(), y.size());
2252	>	if (x instanceof List) {
2253	>	assertEquals(x.toString(), y.toString());
2254	>	}
2255	>	if (x instanceof List || x instanceof Set) {
2256	>	assertEquals(x.hashCode(), y.hashCode());
2257	>	}
2258	>	if (x instanceof List || x instanceof Deque) {
2259	>	assertTrue(Arrays.equals(x.toArray(), y.toArray()));
2260	>	assertTrue(Arrays.equals(x.toArray(new Object[0]),
2261	>	y.toArray(new Object[0])));
2262	>	}
2263	>	}
2264	>
2265	>	/**
2266	>	* A weaker form of assertCollectionsEquals which does not insist
2267	>	* that the two collections satisfy Object#equals(Object), since
2268	>	* they may use identity semantics as Deques do.
2269	>	*/
2270	>	void assertCollectionsEquivalent(Collection<?> x, Collection<?> y) {
2271	>	if (x instanceof List || x instanceof Set)
2272	>	assertCollectionsEquals(x, y);
2273	>	else {
2274	>	assertEquals(x.isEmpty(), y.isEmpty());
2275	>	assertEquals(x.size(), y.size());
2276	>	assertEquals(new HashSet<Object>(x), new HashSet<Object>(y));
2277	>	if (x instanceof Deque) {
2278	>	assertTrue(Arrays.equals(x.toArray(), y.toArray()));
2279	>	assertTrue(Arrays.equals(x.toArray(new Object[0]),
2280	>	y.toArray(new Object[0])));
2281		}
2282		}
2283		}
293	–
2284		}

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