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

Comparing jsr166/src/test/tck/JSR166TestCase.java (file contents):
Revision 1.2 by dl, Sat Sep 20 00:31:57 2003 UTC vs.
Revision 1.276 by jsr166, Fri Nov 25 16:39:49 2022 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 their 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	+	// No longer run with custom securityManagers
199	+	private static final boolean useSecurityManager =
200	+	Boolean.getBoolean("jsr166.useSecurityManager");
201	+
202	+	protected static final boolean expensiveTests =
203	+	Boolean.getBoolean("jsr166.expensiveTests");
204	+
205	+	/**
206	+	* If true, also run tests that are not part of the official tck
207	+	* because they test unspecified implementation details.
208	+	*/
209	+	protected static final boolean testImplementationDetails =
210	+	Boolean.getBoolean("jsr166.testImplementationDetails");
211	+
212	+	/**
213	+	* If true, report on stdout all "slow" tests, that is, ones that
214	+	* take more than profileThreshold milliseconds to execute.
215	+	*/
216	+	private static final boolean profileTests =
217	+	Boolean.getBoolean("jsr166.profileTests");
218	+
219	+	/**
220	+	* The number of milliseconds that tests are permitted for
221	+	* execution without being reported, when profileTests is set.
222	+	*/
223	+	private static final long profileThreshold =
224	+	Long.getLong("jsr166.profileThreshold", 100);
225	+
226	+	/**
227	+	* The number of repetitions per test (for tickling rare bugs).
228	+	*/
229	+	private static final int runsPerTest =
230	+	Integer.getInteger("jsr166.runsPerTest", 1);
231	+
232	+	/**
233	+	* The number of repetitions of the test suite (for finding leaks?).
234	+	*/
235	+	private static final int suiteRuns =
236	+	Integer.getInteger("jsr166.suiteRuns", 1);
237	+
238	+	/**
239	+	* Returns the value of the system property, or NaN if not defined.
240	+	*/
241	+	private static float systemPropertyValue(String name) {
242	+	String floatString = System.getProperty(name);
243	+	if (floatString == null)
244	+	return Float.NaN;
245	+	try {
246	+	return Float.parseFloat(floatString);
247	+	} catch (NumberFormatException ex) {
248	+	throw new IllegalArgumentException(
249	+	String.format("Bad float value in system property %s=%s",
250	+	name, floatString));
251	+	}
252	+	}
253	+
254	+	private static final ThreadMXBean THREAD_MXBEAN
255	+	= ManagementFactory.getThreadMXBean();
256	+
257	+	/**
258	+	* The scaling factor to apply to standard delays used in tests.
259	+	* May be initialized from any of:
260	+	* - the "jsr166.delay.factor" system property
261	+	* - the "test.timeout.factor" system property (as used by jtreg)
262	+	*   See: http://openjdk.java.net/jtreg/tag-spec.html
263	+	* - hard-coded fuzz factor when using a known slowpoke VM
264	+	*/
265	+	private static final float delayFactor = delayFactor();
266	+
267	+	private static float delayFactor() {
268	+	float x;
269	+	if (!Float.isNaN(x = systemPropertyValue("jsr166.delay.factor")))
270	+	return x;
271	+	if (!Float.isNaN(x = systemPropertyValue("test.timeout.factor")))
272	+	return x;
273	+	String prop = System.getProperty("java.vm.version");
274	+	if (prop != null && prop.matches(".*debug.*"))
275	+	return 4.0f; // How much slower is fastdebug than product?!
276	+	return 1.0f;
277	+	}
278	+
279	+	public JSR166TestCase() { super(); }
280	+	public JSR166TestCase(String name) { super(name); }
281	+
282	+	/**
283	+	* A filter for tests to run, matching strings of the form
284	+	* methodName(className), e.g. "testInvokeAll5(ForkJoinPoolTest)"
285	+	* Usefully combined with jsr166.runsPerTest.
286	+	*/
287	+	private static final Pattern methodFilter = methodFilter();
288	+
289	+	private static Pattern methodFilter() {
290	+	String regex = System.getProperty("jsr166.methodFilter");
291	+	return (regex == null) ? null : Pattern.compile(regex);
292	+	}
293	+
294	+	// Instrumentation to debug very rare, but very annoying hung test runs.
295	+	static volatile TestCase currentTestCase;
296	+	// static volatile int currentRun = 0;
297	+	static {
298	+	Runnable wedgedTestDetector = new Runnable() { public void run() {
299	+	// Avoid spurious reports with enormous runsPerTest.
300	+	// A single test case run should never take more than 1 second.
301	+	// But let's cap it at the high end too ...
302	+	final int timeoutMinutesMin = Math.max(runsPerTest / 60, 1)
303	+	* Math.max((int) delayFactor, 1);
304	+	final int timeoutMinutes = Math.min(15, timeoutMinutesMin);
305	+	for (TestCase lastTestCase = currentTestCase;;) {
306	+	try { MINUTES.sleep(timeoutMinutes); }
307	+	catch (InterruptedException unexpected) { break; }
308	+	if (lastTestCase == currentTestCase) {
309	+	System.err.printf(
310	+	"Looks like we're stuck running test: %s%n",
311	+	lastTestCase);
312	+	//                     System.err.printf(
313	+	//                         "Looks like we're stuck running test: %s (%d/%d)%n",
314	+	//                         lastTestCase, currentRun, runsPerTest);
315	+	//                     System.err.println("availableProcessors=" +
316	+	//                         Runtime.getRuntime().availableProcessors());
317	+	//                     System.err.printf("cpu model = %s%n", cpuModel());
318	+	dumpTestThreads();
319	+	// one stack dump is probably enough; more would be spam
320	+	break;
321	+	}
322	+	lastTestCase = currentTestCase;
323	+	}}};
324	+	Thread thread = new Thread(wedgedTestDetector, "WedgedTestDetector");
325	+	thread.setDaemon(true);
326	+	thread.start();
327	+	}
328	+
329	+	//     public static String cpuModel() {
330	+	//         try {
331	+	//             java.util.regex.Matcher matcher
332	+	//               = Pattern.compile("model name\\s*: (.*)")
333	+	//                 .matcher(new String(
334	+	//                     java.nio.file.Files.readAllBytes(
335	+	//                         java.nio.file.Paths.get("/proc/cpuinfo")), "UTF-8"));
336	+	//             matcher.find();
337	+	//             return matcher.group(1);
338	+	//         } catch (Exception ex) { return null; }
339	+	//     }
340	+
341	+	public void runBare() throws Throwable {
342	+	currentTestCase = this;
343	+	if (methodFilter == null
344	+	|| methodFilter.matcher(toString()).find())
345	+	super.runBare();
346	+	}
347	+
348	+	protected void runTest() throws Throwable {
349	+	for (int i = 0; i < runsPerTest; i++) {
350	+	// currentRun = i;
351	+	if (profileTests)
352	+	runTestProfiled();
353	+	else
354	+	super.runTest();
355	+	}
356	+	}
357	+
358	+	protected void runTestProfiled() throws Throwable {
359	+	for (int i = 0; i < 2; i++) {
360	+	long startTime = System.nanoTime();
361	+	super.runTest();
362	+	long elapsedMillis = millisElapsedSince(startTime);
363	+	if (elapsedMillis < profileThreshold)
364	+	break;
365	+	// Never report first run of any test; treat it as a
366	+	// warmup run, notably to trigger all needed classloading,
367	+	if (i > 0)
368	+	System.out.printf("%s: %d%n", toString(), elapsedMillis);
369	+	}
370	+	}
371	+
372	+	/**
373	+	* Runs all JSR166 unit tests using junit.textui.TestRunner.
374	+	*/
375	+	public static void main(String[] args) {
376	+	main(suite(), args);
377	+	}
378	+
379	+	static class PithyResultPrinter extends junit.textui.ResultPrinter {
380	+	PithyResultPrinter(java.io.PrintStream writer) { super(writer); }
381	+	long runTime;
382	+	public void startTest(Test test) {}
383	+	protected void printHeader(long runTime) {
384	+	this.runTime = runTime; // defer printing for later
385	+	}
386	+	protected void printFooter(TestResult result) {
387	+	if (result.wasSuccessful()) {
388	+	getWriter().println("OK (" + result.runCount() + " tests)"
389	+	+ "  Time: " + elapsedTimeAsString(runTime));
390	+	} else {
391	+	getWriter().println("Time: " + elapsedTimeAsString(runTime));
392	+	super.printFooter(result);
393	+	}
394	+	}
395	+	}
396	+
397	+	/**
398	+	* Returns a TestRunner that doesn't bother with unnecessary
399	+	* fluff, like printing a "." for each test case.
400	+	*/
401	+	static junit.textui.TestRunner newPithyTestRunner() {
402	+	junit.textui.TestRunner runner = new junit.textui.TestRunner();
403	+	runner.setPrinter(new PithyResultPrinter(System.out));
404	+	return runner;
405	+	}
406	+
407	+	/**
408	+	* Runs all unit tests in the given test suite.
409	+	* Actual behavior influenced by jsr166.* system properties.
410	+	*/
411	+	@SuppressWarnings("removal")
412	+	static void main(Test suite, String[] args) {
413	+	if (useSecurityManager) {
414	+	System.err.println("Setting a permissive security manager");
415	+	Policy.setPolicy(permissivePolicy());
416	+	try {
417	+	System.setSecurityManager(new SecurityManager());
418	+	} catch (Throwable ok) {  // failure OK during deprecation
419	+	}
420	+	}
421	+	for (int i = 0; i < suiteRuns; i++) {
422	+	TestResult result = newPithyTestRunner().doRun(suite);
423	+	if (!result.wasSuccessful())
424	+	System.exit(1);
425	+	System.gc();
426	+	System.runFinalization();
427	+	}
428	+	}
429	+
430	+	public static TestSuite newTestSuite(Object... suiteOrClasses) {
431	+	TestSuite suite = new TestSuite();
432	+	for (Object suiteOrClass : suiteOrClasses) {
433	+	if (suiteOrClass instanceof TestSuite)
434	+	suite.addTest((TestSuite) suiteOrClass);
435	+	else if (suiteOrClass instanceof Class)
436	+	suite.addTest(new TestSuite((Class<?>) suiteOrClass));
437	+	else
438	+	throw new ClassCastException("not a test suite or class");
439	+	}
440	+	return suite;
441	+	}
442	+
443	+	public static void addNamedTestClasses(TestSuite suite,
444	+	String... testClassNames) {
445	+	for (String testClassName : testClassNames) {
446	+	try {
447	+	Class<?> testClass = Class.forName(testClassName);
448	+	Method m = testClass.getDeclaredMethod("suite");
449	+	suite.addTest(newTestSuite((Test)m.invoke(null)));
450	+	} catch (ReflectiveOperationException e) {
451	+	throw new AssertionError("Missing test class", e);
452	+	}
453	+	}
454	+	}
455	+
456	+	public static final double JAVA_CLASS_VERSION;
457	+	public static final String JAVA_SPECIFICATION_VERSION;
458	+	static {
459	+	try {
460	+	@SuppressWarnings("removal") double jcv =
461	+	java.security.AccessController.doPrivileged(
462	+	new java.security.PrivilegedAction<Double>() {
463	+	public Double run() {
464	+	return Double.valueOf(System.getProperty("java.class.version"));}});
465	+	JAVA_CLASS_VERSION = jcv;
466	+	@SuppressWarnings("removal") String jsv =
467	+	java.security.AccessController.doPrivileged(
468	+	new java.security.PrivilegedAction<String>() {
469	+	public String run() {
470	+	return System.getProperty("java.specification.version");}});
471	+	JAVA_SPECIFICATION_VERSION = jsv;
472	+	} catch (Throwable t) {
473	+	throw new Error(t);
474	+	}
475	+	}
476	+
477	+	public static boolean atLeastJava6()  { return JAVA_CLASS_VERSION >= 50.0; }
478	+	public static boolean atLeastJava7()  { return JAVA_CLASS_VERSION >= 51.0; }
479	+	public static boolean atLeastJava8()  { return JAVA_CLASS_VERSION >= 52.0; }
480	+	public static boolean atLeastJava9()  { return JAVA_CLASS_VERSION >= 53.0; }
481	+	public static boolean atLeastJava10() { return JAVA_CLASS_VERSION >= 54.0; }
482	+	public static boolean atLeastJava11() { return JAVA_CLASS_VERSION >= 55.0; }
483	+	public static boolean atLeastJava12() { return JAVA_CLASS_VERSION >= 56.0; }
484	+	public static boolean atLeastJava13() { return JAVA_CLASS_VERSION >= 57.0; }
485	+	public static boolean atLeastJava14() { return JAVA_CLASS_VERSION >= 58.0; }
486	+	public static boolean atLeastJava15() { return JAVA_CLASS_VERSION >= 59.0; }
487	+	public static boolean atLeastJava16() { return JAVA_CLASS_VERSION >= 60.0; }
488	+	public static boolean atLeastJava17() { return JAVA_CLASS_VERSION >= 61.0; }
489	+
490	+	/**
491	+	* Collects all JSR166 unit tests as one suite.
492	+	*/
493	+	public static Test suite() {
494	+	// Java7+ test classes
495	+	TestSuite suite = newTestSuite(
496	+	ForkJoinPoolTest.suite(),
497	+	ForkJoinTaskTest.suite(),
498	+	RecursiveActionTest.suite(),
499	+	RecursiveTaskTest.suite(),
500	+	LinkedTransferQueueTest.suite(),
501	+	PhaserTest.suite(),
502	+	ThreadLocalRandomTest.suite(),
503	+	AbstractExecutorServiceTest.suite(),
504	+	AbstractQueueTest.suite(),
505	+	AbstractQueuedSynchronizerTest.suite(),
506	+	AbstractQueuedLongSynchronizerTest.suite(),
507	+	ArrayBlockingQueueTest.suite(),
508	+	ArrayDequeTest.suite(),
509	+	ArrayListTest.suite(),
510	+	AtomicBooleanTest.suite(),
511	+	AtomicIntegerArrayTest.suite(),
512	+	AtomicIntegerFieldUpdaterTest.suite(),
513	+	AtomicIntegerTest.suite(),
514	+	AtomicLongArrayTest.suite(),
515	+	AtomicLongFieldUpdaterTest.suite(),
516	+	AtomicLongTest.suite(),
517	+	AtomicMarkableReferenceTest.suite(),
518	+	AtomicReferenceArrayTest.suite(),
519	+	AtomicReferenceFieldUpdaterTest.suite(),
520	+	AtomicReferenceTest.suite(),
521	+	AtomicStampedReferenceTest.suite(),
522	+	ConcurrentHashMapTest.suite(),
523	+	ConcurrentLinkedDequeTest.suite(),
524	+	ConcurrentLinkedQueueTest.suite(),
525	+	ConcurrentSkipListMapTest.suite(),
526	+	ConcurrentSkipListSubMapTest.suite(),
527	+	ConcurrentSkipListSetTest.suite(),
528	+	ConcurrentSkipListSubSetTest.suite(),
529	+	CopyOnWriteArrayListTest.suite(),
530	+	CopyOnWriteArraySetTest.suite(),
531	+	CountDownLatchTest.suite(),
532	+	CountedCompleterTest.suite(),
533	+	CyclicBarrierTest.suite(),
534	+	DelayQueueTest.suite(),
535	+	EntryTest.suite(),
536	+	ExchangerTest.suite(),
537	+	ExecutorsTest.suite(),
538	+	ExecutorCompletionServiceTest.suite(),
539	+	FutureTaskTest.suite(),
540	+	HashtableTest.suite(),
541	+	LinkedBlockingDequeTest.suite(),
542	+	LinkedBlockingQueueTest.suite(),
543	+	LinkedListTest.suite(),
544	+	LockSupportTest.suite(),
545	+	PriorityBlockingQueueTest.suite(),
546	+	PriorityQueueTest.suite(),
547	+	ReentrantLockTest.suite(),
548	+	ReentrantReadWriteLockTest.suite(),
549	+	ScheduledExecutorTest.suite(),
550	+	ScheduledExecutorSubclassTest.suite(),
551	+	SemaphoreTest.suite(),
552	+	SynchronousQueueTest.suite(),
553	+	SystemTest.suite(),
554	+	ThreadLocalTest.suite(),
555	+	ThreadPoolExecutorTest.suite(),
556	+	ThreadPoolExecutorSubclassTest.suite(),
557	+	ThreadTest.suite(),
558	+	TimeUnitTest.suite(),
559	+	TreeMapTest.suite(),
560	+	TreeSetTest.suite(),
561	+	TreeSubMapTest.suite(),
562	+	TreeSubSetTest.suite(),
563	+	VectorTest.suite());
564	+
565	+	// Java8+ test classes
566	+	if (atLeastJava8()) {
567	+	String[] java8TestClassNames = {
568	+	"ArrayDeque8Test",
569	+	"Atomic8Test",
570	+	"CompletableFutureTest",
571	+	"ConcurrentHashMap8Test",
572	+	"CountedCompleter8Test",
573	+	"DoubleAccumulatorTest",
574	+	"DoubleAdderTest",
575	+	"ForkJoinPool8Test",
576	+	"ForkJoinTask8Test",
577	+	"HashMapTest",
578	+	"LinkedBlockingDeque8Test",
579	+	"LinkedBlockingQueue8Test",
580	+	"LinkedHashMapTest",
581	+	"LongAccumulatorTest",
582	+	"LongAdderTest",
583	+	"SplittableRandomTest",
584	+	"StampedLockTest",
585	+	"SubmissionPublisherTest",
586	+	"ThreadLocalRandom8Test",
587	+	"TimeUnit8Test",
588	+	};
589	+	addNamedTestClasses(suite, java8TestClassNames);
590	+	}
591	+
592	+	// Java9+ test classes
593	+	if (atLeastJava9()) {
594	+	String[] java9TestClassNames = {
595	+	"AtomicBoolean9Test",
596	+	"AtomicInteger9Test",
597	+	"AtomicIntegerArray9Test",
598	+	"AtomicLong9Test",
599	+	"AtomicLongArray9Test",
600	+	"AtomicReference9Test",
601	+	"AtomicReferenceArray9Test",
602	+	"ExecutorCompletionService9Test",
603	+	"ForkJoinPool9Test",
604	+	};
605	+	addNamedTestClasses(suite, java9TestClassNames);
606	+	}
607	+
608	+	if (atLeastJava17()) {
609	+	String[] java17TestClassNames = {
610	+	"ForkJoinPool19Test",
611	+	};
612	+	addNamedTestClasses(suite, java17TestClassNames);
613	+	}
614	+	return suite;
615	+	}
616	+
617	+	/** Returns list of junit-style test method names in given class. */
618	+	public static ArrayList<String> testMethodNames(Class<?> testClass) {
619	+	Method[] methods = testClass.getDeclaredMethods();
620	+	ArrayList<String> names = new ArrayList<>(methods.length);
621	+	for (Method method : methods) {
622	+	if (method.getName().startsWith("test")
623	+	&& Modifier.isPublic(method.getModifiers())
624	+	// method.getParameterCount() requires jdk8+
625	+	&& method.getParameterTypes().length == 0) {
626	+	names.add(method.getName());
627	+	}
628	+	}
629	+	return names;
630	+	}
631	+
632	+	/**
633	+	* Returns junit-style testSuite for the given test class, but
634	+	* parameterized by passing extra data to each test.
635	+	*/
636	+	public static <ExtraData> Test parameterizedTestSuite
637	+	(Class<? extends JSR166TestCase> testClass,
638	+	Class<ExtraData> dataClass,
639	+	ExtraData data) {
640	+	try {
641	+	TestSuite suite = new TestSuite();
642	+	Constructor c =
643	+	testClass.getDeclaredConstructor(dataClass, String.class);
644	+	for (String methodName : testMethodNames(testClass))
645	+	suite.addTest((Test) c.newInstance(data, methodName));
646	+	return suite;
647	+	} catch (ReflectiveOperationException e) {
648	+	throw new AssertionError(e);
649	+	}
650	+	}
651	+
652	+	/**
653	+	* Returns junit-style testSuite for the jdk8 extension of the
654	+	* given test class, but parameterized by passing extra data to
655	+	* each test.  Uses reflection to allow compilation in jdk7.
656	+	*/
657	+	public static <ExtraData> Test jdk8ParameterizedTestSuite
658	+	(Class<? extends JSR166TestCase> testClass,
659	+	Class<ExtraData> dataClass,
660	+	ExtraData data) {
661	+	if (atLeastJava8()) {
662	+	String name = testClass.getName();
663	+	String name8 = name.replaceAll("Test$", "8Test");
664	+	if (name.equals(name8)) throw new AssertionError(name);
665	+	try {
666	+	return (Test)
667	+	Class.forName(name8)
668	+	.getMethod("testSuite", dataClass)
669	+	.invoke(null, data);
670	+	} catch (ReflectiveOperationException e) {
671	+	throw new AssertionError(e);
672	+	}
673	+	} else {
674	+	return new TestSuite();
675	+	}
676	+	}
677	+
678	+	// Delays for timing-dependent tests, in milliseconds.
679
680		public static long SHORT_DELAY_MS;
681		public static long SMALL_DELAY_MS;
682		public static long MEDIUM_DELAY_MS;
683		public static long LONG_DELAY_MS;
684
685	+	/**
686	+	* A delay significantly longer than LONG_DELAY_MS.
687	+	* Use this in a thread that is waited for via awaitTermination(Thread).
688	+	*/
689	+	public static long LONGER_DELAY_MS;
690	+
691	+	private static final long RANDOM_TIMEOUT;
692	+	private static final long RANDOM_EXPIRED_TIMEOUT;
693	+	private static final TimeUnit RANDOM_TIMEUNIT;
694	+	static {
695	+	ThreadLocalRandom rnd = ThreadLocalRandom.current();
696	+	long[] timeouts = { Long.MIN_VALUE, -1, 0, 1, Long.MAX_VALUE };
697	+	RANDOM_TIMEOUT = timeouts[rnd.nextInt(timeouts.length)];
698	+	RANDOM_EXPIRED_TIMEOUT = timeouts[rnd.nextInt(3)];
699	+	TimeUnit[] timeUnits = TimeUnit.values();
700	+	RANDOM_TIMEUNIT = timeUnits[rnd.nextInt(timeUnits.length)];
701	+	}
702
703		/**
704	<	* Return the shortest timed delay. This could
705	<	* be reimplmented to use for example a Property.
706	<	*/
707	<	protected long getShortDelay() {
708	<	return 50;
704	>	* Returns a timeout for use when any value at all will do.
705	>	*/
706	>	static long randomTimeout() { return RANDOM_TIMEOUT; }
707	>
708	>	/**
709	>	* Returns a timeout that means "no waiting", i.e. not positive.
710	>	*/
711	>	static long randomExpiredTimeout() { return RANDOM_EXPIRED_TIMEOUT; }
712	>
713	>	/**
714	>	* Returns a random non-null TimeUnit.
715	>	*/
716	>	static TimeUnit randomTimeUnit() { return RANDOM_TIMEUNIT; }
717	>
718	>	/**
719	>	* Returns a random boolean; a "coin flip".
720	>	*/
721	>	static boolean randomBoolean() {
722	>	return ThreadLocalRandom.current().nextBoolean();
723	>	}
724	>
725	>	/**
726	>	* Returns a random element from given choices.
727	>	*/
728	>	<T> T chooseRandomly(List<T> choices) {
729	>	return choices.get(ThreadLocalRandom.current().nextInt(choices.size()));
730		}
731
732	+	/**
733	+	* Returns a random element from given choices.
734	+	*/
735	+	@SuppressWarnings("unchecked")
736	+	<T> T chooseRandomly(T... choices) {
737	+	return choices[ThreadLocalRandom.current().nextInt(choices.length)];
738	+	}
739
740		/**
741	<	* Set delays as multiples fo SHORT_DELAY.
741	>	* Returns the shortest timed delay. This can be scaled up for
742	>	* slow machines using the jsr166.delay.factor system property,
743	>	* or via jtreg's -timeoutFactor: flag.
744	>	* http://openjdk.java.net/jtreg/command-help.html
745		*/
746	<	protected  void setDelays() {
746	>	protected long getShortDelay() {
747	>	return (long) (50 * delayFactor);
748	>	}
749	>
750	>	/**
751	>	* Sets delays as multiples of SHORT_DELAY.
752	>	*/
753	>	protected void setDelays() {
754		SHORT_DELAY_MS = getShortDelay();
755	<	SMALL_DELAY_MS = SHORT_DELAY_MS * 5;
755	>	SMALL_DELAY_MS  = SHORT_DELAY_MS * 5;
756		MEDIUM_DELAY_MS = SHORT_DELAY_MS * 10;
757	<	LONG_DELAY_MS = SHORT_DELAY_MS * 50;
757	>	LONG_DELAY_MS   = SHORT_DELAY_MS * 200;
758	>	LONGER_DELAY_MS = 2 * LONG_DELAY_MS;
759		}
760
761	+	private static final long TIMEOUT_DELAY_MS
762	+	= (long) (12.0 * Math.cbrt(delayFactor));
763	+
764		/**
765	<	* Flag set true if any threadAssert methods fail
765	>	* Returns a timeout in milliseconds to be used in tests that verify
766	>	* that operations block or time out.  We want this to be longer
767	>	* than the OS scheduling quantum, but not too long, so don't scale
768	>	* linearly with delayFactor; we use "crazy" cube root instead.
769		*/
770	<	protected volatile boolean threadFailed;
770	>	static long timeoutMillis() {
771	>	return TIMEOUT_DELAY_MS;
772	>	}
773
774		/**
775	<	* Initialize test to indicat that no thread assertions have failed
775	>	* Returns a new Date instance representing a time at least
776	>	* delayMillis milliseconds in the future.
777		*/
778	<	public void setUp() {
778	>	Date delayedDate(long delayMillis) {
779	>	// Add 1 because currentTimeMillis is known to round into the past.
780	>	return new Date(System.currentTimeMillis() + delayMillis + 1);
781	>	}
782	>
783	>	/**
784	>	* The first exception encountered if any threadAssertXXX method fails.
785	>	*/
786	>	private final AtomicReference<Throwable> threadFailure
787	>	= new AtomicReference<>(null);
788	>
789	>	/**
790	>	* Records an exception so that it can be rethrown later in the test
791	>	* harness thread, triggering a test case failure.  Only the first
792	>	* failure is recorded; subsequent calls to this method from within
793	>	* the same test have no effect.
794	>	*/
795	>	public void threadRecordFailure(Throwable t) {
796	>	System.err.println(t);
797	>	if (threadFailure.compareAndSet(null, t))
798	>	dumpTestThreads();
799	>	}
800	>
801	>	public void setUp() {
802		setDelays();
803	<	threadFailed = false;
803	>	}
804	>
805	>	void tearDownFail(String format, Object... args) {
806	>	String msg = toString() + ": " + String.format(format, args);
807	>	System.err.println(msg);
808	>	dumpTestThreads();
809	>	throw new AssertionError(msg);
810	>	}
811	>
812	>	/**
813	>	* Extra checks that get done for all test cases.
814	>	*
815	>	* Triggers test case failure if any thread assertions have failed,
816	>	* by rethrowing, in the test harness thread, any exception recorded
817	>	* earlier by threadRecordFailure.
818	>	*
819	>	* Triggers test case failure if interrupt status is set in the main thread.
820	>	*/
821	>	public void tearDown() throws Exception {
822	>	Throwable t = threadFailure.getAndSet(null);
823	>	if (t != null) {
824	>	if (t instanceof Error)
825	>	throw (Error) t;
826	>	else if (t instanceof RuntimeException)
827	>	throw (RuntimeException) t;
828	>	else if (t instanceof Exception)
829	>	throw (Exception) t;
830	>	else
831	>	throw new AssertionError(t.toString(), t);
832	>	}
833	>
834	>	if (Thread.interrupted())
835	>	tearDownFail("interrupt status set in main thread");
836	>
837	>	checkForkJoinPoolThreadLeaks();
838		}
839
840		/**
841	<	* Trigger test case failure if any thread assertions have failed
841	>	* Finds missing PoolCleaners
842		*/
843	<	public void tearDown() {
844	<	assertFalse(threadFailed);
843	>	void checkForkJoinPoolThreadLeaks() throws InterruptedException {
844	>	Thread[] survivors = new Thread[7];
845	>	int count = Thread.enumerate(survivors);
846	>	for (int i = 0; i < count; i++) {
847	>	Thread thread = survivors[i];
848	>	String name = thread.getName();
849	>	if (name.startsWith("ForkJoinPool-")) {
850	>	// give thread some time to terminate
851	>	thread.join(LONG_DELAY_MS);
852	>	if (thread.isAlive())
853	>	tearDownFail("Found leaked ForkJoinPool thread thread=%s",
854	>	thread);
855	>	}
856	>	}
857	>
858	>	if (!ForkJoinPool.commonPool()
859	>	.awaitQuiescence(LONG_DELAY_MS, MILLISECONDS))
860	>	tearDownFail("ForkJoin common pool thread stuck");
861		}
862
863	+	/**
864	+	* Just like fail(reason), but additionally recording (using
865	+	* threadRecordFailure) any AssertionError thrown, so that the
866	+	* current testcase will fail.
867	+	*/
868		public void threadFail(String reason) {
869	<	threadFailed = true;
870	<	fail(reason);
869	>	try {
870	>	fail(reason);
871	>	} catch (AssertionError fail) {
872	>	threadRecordFailure(fail);
873	>	throw fail;
874	>	}
875		}
876
877	+	/**
878	+	* Just like assertTrue(b), but additionally recording (using
879	+	* threadRecordFailure) any AssertionError thrown, so that the
880	+	* current testcase will fail.
881	+	*/
882		public void threadAssertTrue(boolean b) {
883	<	if (!b) {
108	<	threadFailed = true;
883	>	try {
884		assertTrue(b);
885	+	} catch (AssertionError fail) {
886	+	threadRecordFailure(fail);
887	+	throw fail;
888		}
889		}
890	+
891	+	/**
892	+	* Just like assertFalse(b), but additionally recording (using
893	+	* threadRecordFailure) any AssertionError thrown, so that the
894	+	* current testcase will fail.
895	+	*/
896		public void threadAssertFalse(boolean b) {
897	<	if (b) {
114	<	threadFailed = true;
897	>	try {
898		assertFalse(b);
899	+	} catch (AssertionError fail) {
900	+	threadRecordFailure(fail);
901	+	throw fail;
902		}
903		}
904	+
905	+	/**
906	+	* Just like assertNull(x), but additionally recording (using
907	+	* threadRecordFailure) any AssertionError thrown, so that the
908	+	* current testcase will fail.
909	+	*/
910		public void threadAssertNull(Object x) {
911	<	if (x != null) {
120	<	threadFailed = true;
911	>	try {
912		assertNull(x);
913	+	} catch (AssertionError fail) {
914	+	threadRecordFailure(fail);
915	+	throw fail;
916		}
917		}
918	+
919	+	/**
920	+	* Just like assertEquals(x, y), but additionally recording (using
921	+	* threadRecordFailure) any AssertionError thrown, so that the
922	+	* current testcase will fail.
923	+	*/
924		public void threadAssertEquals(long x, long y) {
925	<	if (x != y) {
126	<	threadFailed = true;
925	>	try {
926		assertEquals(x, y);
927	+	} catch (AssertionError fail) {
928	+	threadRecordFailure(fail);
929	+	throw fail;
930		}
931		}
932	+
933	+	/**
934	+	* Just like assertEquals(x, y), but additionally recording (using
935	+	* threadRecordFailure) any AssertionError thrown, so that the
936	+	* current testcase will fail.
937	+	*/
938		public void threadAssertEquals(Object x, Object y) {
939	<	if (x != y && (x == null || !x.equals(y))) {
132	<	threadFailed = true;
939	>	try {
940		assertEquals(x, y);
941	+	} catch (AssertionError fail) {
942	+	threadRecordFailure(fail);
943	+	throw fail;
944	+	} catch (Throwable fail) {
945	+	threadUnexpectedException(fail);
946		}
947		}
948
949		/**
950	<	* Wait out termination of a thread pool or fail doing so
950	>	* Just like assertSame(x, y), but additionally recording (using
951	>	* threadRecordFailure) any AssertionError thrown, so that the
952	>	* current testcase will fail.
953		*/
954	<	public void joinPool(ExecutorService exec) {
954	>	public void threadAssertSame(Object x, Object y) {
955		try {
956	<	exec.shutdown();
957	<	assertTrue(exec.awaitTermination(LONG_DELAY_MS, TimeUnit.MILLISECONDS));
958	<	} catch(InterruptedException ie) {
959	<	fail("unexpected exception");
956	>	assertSame(x, y);
957	>	} catch (AssertionError fail) {
958	>	threadRecordFailure(fail);
959	>	throw fail;
960		}
961		}
962
963	+	/**
964	+	* Calls threadFail with message "should throw exception".
965	+	*/
966	+	public void threadShouldThrow() {
967	+	threadFail("should throw exception");
968	+	}
969
970	+	/**
971	+	* Calls threadFail with message "should throw" + exceptionName.
972	+	*/
973	+	public void threadShouldThrow(String exceptionName) {
974	+	threadFail("should throw " + exceptionName);
975	+	}
976
977		/**
978	<	* The number of elements to place in collections, arrays, etc.
978	>	* Records the given exception using {@link #threadRecordFailure},
979	>	* then rethrows the exception, wrapping it in an AssertionError
980	>	* if necessary.
981		*/
982	<	public static final int SIZE = 20;
982	>	public void threadUnexpectedException(Throwable t) {
983	>	threadRecordFailure(t);
984	>	t.printStackTrace();
985	>	if (t instanceof RuntimeException)
986	>	throw (RuntimeException) t;
987	>	else if (t instanceof Error)
988	>	throw (Error) t;
989	>	else
990	>	throw new AssertionError("unexpected exception: " + t, t);
991	>	}
992
993	<	// Some convenient Integer constants
993	>	/**
994	>	* Delays, via Thread.sleep, for the given millisecond delay, but
995	>	* if the sleep is shorter than specified, may re-sleep or yield
996	>	* until time elapses.  Ensures that the given time, as measured
997	>	* by System.nanoTime(), has elapsed.
998	>	*/
999	>	static void delay(long millis) throws InterruptedException {
1000	>	long nanos = millis * (1000 * 1000);
1001	>	final long wakeupTime = System.nanoTime() + nanos;
1002	>	do {
1003	>	if (millis > 0L)
1004	>	Thread.sleep(millis);
1005	>	else // too short to sleep
1006	>	Thread.yield();
1007	>	nanos = wakeupTime - System.nanoTime();
1008	>	millis = nanos / (1000 * 1000);
1009	>	} while (nanos >= 0L);
1010	>	}
1011
1012	<	public static final Integer zero = new Integer(0);
1013	<	public static final Integer one = new Integer(1);
1014	<	public static final Integer two = new Integer(2);
1015	<	public static final Integer three  = new Integer(3);
1016	<	public static final Integer four  = new Integer(4);
1017	<	public static final Integer five  = new Integer(5);
1018	<	public static final Integer six = new Integer(6);
1019	<	public static final Integer seven = new Integer(7);
166	<	public static final Integer eight = new Integer(8);
167	<	public static final Integer nine = new Integer(9);
168	<	public static final Integer m1  = new Integer(-1);
169	<	public static final Integer m2  = new Integer(-2);
170	<	public static final Integer m3  = new Integer(-3);
171	<	public static final Integer m4 = new Integer(-4);
172	<	public static final Integer m5 = new Integer(-5);
173	<	public static final Integer m10 = new Integer(-10);
1012	>	/**
1013	>	* Allows use of try-with-resources with per-test thread pools.
1014	>	*/
1015	>	class PoolCleaner implements AutoCloseable {
1016	>	private final ExecutorService pool;
1017	>	public PoolCleaner(ExecutorService pool) { this.pool = pool; }
1018	>	public void close() { joinPool(pool); }
1019	>	}
1020
1021	+	/**
1022	+	* An extension of PoolCleaner that has an action to release the pool.
1023	+	*/
1024	+	class PoolCleanerWithReleaser extends PoolCleaner {
1025	+	private final Runnable releaser;
1026	+	public PoolCleanerWithReleaser(ExecutorService pool, Runnable releaser) {
1027	+	super(pool);
1028	+	this.releaser = releaser;
1029	+	}
1030	+	public void close() {
1031	+	try {
1032	+	releaser.run();
1033	+	} finally {
1034	+	super.close();
1035	+	}
1036	+	}
1037	+	}
1038
1039	<	// Some convenient Runnable classes
1039	>	PoolCleaner cleaner(ExecutorService pool) {
1040	>	return new PoolCleaner(pool);
1041	>	}
1042
1043	<	public static class NoOpRunnable implements Runnable {
1044	<	public void run() {}
1043	>	PoolCleaner cleaner(ExecutorService pool, Runnable releaser) {
1044	>	return new PoolCleanerWithReleaser(pool, releaser);
1045		}
1046
1047	<	public static class NoOpCallable implements Callable {
1048	<	public Object call() { return Boolean.TRUE; }
1047	>	PoolCleaner cleaner(ExecutorService pool, CountDownLatch latch) {
1048	>	return new PoolCleanerWithReleaser(pool, releaser(latch));
1049		}
1050
1051	<	public class ShortRunnable implements Runnable {
1052	<	public void run() {
1051	>	Runnable releaser(final CountDownLatch latch) {
1052	>	return new Runnable() { public void run() {
1053	>	do { latch.countDown(); }
1054	>	while (latch.getCount() > 0);
1055	>	}};
1056	>	}
1057	>
1058	>	PoolCleaner cleaner(ExecutorService pool, AtomicBoolean flag) {
1059	>	return new PoolCleanerWithReleaser(pool, releaser(flag));
1060	>	}
1061	>
1062	>	Runnable releaser(final AtomicBoolean flag) {
1063	>	return new Runnable() { public void run() { flag.set(true); }};
1064	>	}
1065	>
1066	>	/**
1067	>	* Waits out termination of a thread pool or fails doing so.
1068	>	*/
1069	>	void joinPool(ExecutorService pool) {
1070	>	try {
1071	>	pool.shutdown();
1072	>	if (!pool.awaitTermination(20 * LONG_DELAY_MS, MILLISECONDS)) {
1073	>	try {
1074	>	threadFail("ExecutorService " + pool +
1075	>	" did not terminate in a timely manner");
1076	>	} finally {
1077	>	// last resort, for the benefit of subsequent tests
1078	>	pool.shutdownNow();
1079	>	pool.awaitTermination(MEDIUM_DELAY_MS, MILLISECONDS);
1080	>	}
1081	>	}
1082	>	} catch (SecurityException ok) {
1083	>	// Allowed in case test doesn't have privs
1084	>	} catch (InterruptedException fail) {
1085	>	threadFail("Unexpected InterruptedException");
1086	>	}
1087	>	}
1088	>
1089	>	/**
1090	>	* Like Runnable, but with the freedom to throw anything.
1091	>	* junit folks had the same idea:
1092	>	* http://junit.org/junit5/docs/snapshot/api/org/junit/gen5/api/Executable.html
1093	>	*/
1094	>	interface Action { public void run() throws Throwable; }
1095	>
1096	>	/**
1097	>	* Runs all the given actions in parallel, failing if any fail.
1098	>	* Useful for running multiple variants of tests that are
1099	>	* necessarily individually slow because they must block.
1100	>	*/
1101	>	void testInParallel(Action ... actions) {
1102	>	ExecutorService pool = Executors.newCachedThreadPool();
1103	>	try (PoolCleaner cleaner = cleaner(pool)) {
1104	>	ArrayList<Future<?>> futures = new ArrayList<>(actions.length);
1105	>	for (final Action action : actions)
1106	>	futures.add(pool.submit(new CheckedRunnable() {
1107	>	public void realRun() throws Throwable { action.run();}}));
1108	>	for (Future<?> future : futures)
1109	>	try {
1110	>	assertNull(future.get(LONG_DELAY_MS, MILLISECONDS));
1111	>	} catch (ExecutionException ex) {
1112	>	threadUnexpectedException(ex.getCause());
1113	>	} catch (Exception ex) {
1114	>	threadUnexpectedException(ex);
1115	>	}
1116	>	}
1117	>	}
1118	>
1119	>	/** Returns true if thread info might be useful in a thread dump. */
1120	>	static boolean threadOfInterest(ThreadInfo info) {
1121	>	final String name = info.getThreadName();
1122	>	String lockName;
1123	>	if (name == null)
1124	>	return true;
1125	>	if (name.equals("Signal Dispatcher")
1126	>	|| name.equals("WedgedTestDetector"))
1127	>	return false;
1128	>	if (name.equals("Reference Handler")) {
1129	>	// Reference Handler stacktrace changed in JDK-8156500
1130	>	StackTraceElement[] stackTrace; String methodName;
1131	>	if ((stackTrace = info.getStackTrace()) != null
1132	>	&& stackTrace.length > 0
1133	>	&& (methodName = stackTrace[0].getMethodName()) != null
1134	>	&& methodName.equals("waitForReferencePendingList"))
1135	>	return false;
1136	>	// jdk8 Reference Handler stacktrace
1137	>	if ((lockName = info.getLockName()) != null
1138	>	&& lockName.startsWith("java.lang.ref"))
1139	>	return false;
1140	>	}
1141	>	if ((name.equals("Finalizer") || name.equals("Common-Cleaner"))
1142	>	&& (lockName = info.getLockName()) != null
1143	>	&& lockName.startsWith("java.lang.ref"))
1144	>	return false;
1145	>	if (name.startsWith("ForkJoinPool.commonPool-worker")
1146	>	&& (lockName = info.getLockName()) != null
1147	>	&& lockName.startsWith("java.util.concurrent.ForkJoinPool"))
1148	>	return false;
1149	>	return true;
1150	>	}
1151	>
1152	>	/**
1153	>	* A debugging tool to print stack traces of most threads, as jstack does.
1154	>	* Uninteresting threads are filtered out.
1155	>	*/
1156	>	@SuppressWarnings("removal")
1157	>	static void dumpTestThreads() {
1158	>	SecurityManager sm = System.getSecurityManager();
1159	>	if (sm != null) {
1160		try {
1161	<	Thread.sleep(SHORT_DELAY_MS);
1161	>	System.setSecurityManager(null);
1162	>	} catch (SecurityException giveUp) {
1163	>	return;
1164		}
1165	<	catch(Exception e) {
1166	<	threadFail("unexpectedException");
1165	>	}
1166	>
1167	>	System.err.println("------ stacktrace dump start ------");
1168	>	for (ThreadInfo info : THREAD_MXBEAN.dumpAllThreads(true, true))
1169	>	if (threadOfInterest(info))
1170	>	System.err.print(info);
1171	>	System.err.println("------ stacktrace dump end ------");
1172	>
1173	>	if (sm != null) System.setSecurityManager(sm);
1174	>	}
1175	>
1176	>	/**
1177	>	* Checks that thread eventually enters the expected blocked thread state.
1178	>	*/
1179	>	void assertThreadBlocks(Thread thread, Thread.State expected) {
1180	>	// always sleep at least 1 ms, with high probability avoiding
1181	>	// transitory states
1182	>	for (long retries = LONG_DELAY_MS * 3 / 4; retries-->0; ) {
1183	>	try { delay(1); }
1184	>	catch (InterruptedException fail) {
1185	>	throw new AssertionError("Unexpected InterruptedException", fail);
1186		}
1187	+	Thread.State s = thread.getState();
1188	+	if (s == expected)
1189	+	return;
1190	+	else if (s == Thread.State.TERMINATED)
1191	+	fail("Unexpected thread termination");
1192		}
1193	+	fail("timed out waiting for thread to enter thread state " + expected);
1194		}
1195
1196	<	public class ShortInterruptedRunnable implements Runnable {
1197	<	public void run() {
1196	>	/**
1197	>	* Returns the thread's blocker's class name, if any, else null.
1198	>	*/
1199	>	String blockerClassName(Thread thread) {
1200	>	ThreadInfo threadInfo; LockInfo lockInfo;
1201	>	if ((threadInfo = THREAD_MXBEAN.getThreadInfo(thread.getId(), 0)) != null
1202	>	&& (lockInfo = threadInfo.getLockInfo()) != null)
1203	>	return lockInfo.getClassName();
1204	>	return null;
1205	>	}
1206	>
1207	>	/**
1208	>	* Checks that future.get times out, with the default timeout of
1209	>	* {@code timeoutMillis()}.
1210	>	*/
1211	>	void assertFutureTimesOut(Future<?> future) {
1212	>	assertFutureTimesOut(future, timeoutMillis());
1213	>	}
1214	>
1215	>	/**
1216	>	* Checks that future.get times out, with the given millisecond timeout.
1217	>	*/
1218	>	void assertFutureTimesOut(Future<?> future, long timeoutMillis) {
1219	>	long startTime = System.nanoTime();
1220	>	try {
1221	>	future.get(timeoutMillis, MILLISECONDS);
1222	>	shouldThrow();
1223	>	} catch (TimeoutException success) {
1224	>	} catch (Exception fail) {
1225	>	threadUnexpectedException(fail);
1226	>	}
1227	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
1228	>	assertFalse(future.isDone());
1229	>	}
1230	>
1231	>	/**
1232	>	* Fails with message "should throw exception".
1233	>	*/
1234	>	public void shouldThrow() {
1235	>	fail("Should throw exception");
1236	>	}
1237	>
1238	>	/**
1239	>	* Fails with message "should throw " + exceptionName.
1240	>	*/
1241	>	public void shouldThrow(String exceptionName) {
1242	>	fail("Should throw " + exceptionName);
1243	>	}
1244	>
1245	>	/**
1246	>	* The maximum number of consecutive spurious wakeups we should
1247	>	* tolerate (from APIs like LockSupport.park) before failing a test.
1248	>	*/
1249	>	static final int MAX_SPURIOUS_WAKEUPS = 10;
1250	>
1251	>	/**
1252	>	* The number of elements to place in collections, arrays, etc.
1253	>	* Must be at least ten;
1254	>	*/
1255	>	public static final int SIZE = 32;
1256	>
1257	>	static Item[] seqItems(int size) {
1258	>	Item[] s = new Item[size];
1259	>	for (int i = 0; i < size; ++i)
1260	>	s[i] = new Item(i);
1261	>	return s;
1262	>	}
1263	>	static Item[] negativeSeqItems(int size) {
1264	>	Item[] s = new Item[size];
1265	>	for (int i = 0; i < size; ++i)
1266	>	s[i] = new Item(-i);
1267	>	return s;
1268	>	}
1269	>
1270	>	// Many tests rely on defaultItems all being sequential nonnegative
1271	>	public static final Item[] defaultItems = seqItems(SIZE);
1272	>
1273	>	static Item itemFor(int i) { // check cache for defaultItems
1274	>	Item[] items = defaultItems;
1275	>	return (i >= 0 && i < items.length) ? items[i] : new Item(i);
1276	>	}
1277	>
1278	>	public static final Item zero  = defaultItems[0];
1279	>	public static final Item one   = defaultItems[1];
1280	>	public static final Item two   = defaultItems[2];
1281	>	public static final Item three = defaultItems[3];
1282	>	public static final Item four  = defaultItems[4];
1283	>	public static final Item five  = defaultItems[5];
1284	>	public static final Item six   = defaultItems[6];
1285	>	public static final Item seven = defaultItems[7];
1286	>	public static final Item eight = defaultItems[8];
1287	>	public static final Item nine  = defaultItems[9];
1288	>	public static final Item ten   = defaultItems[10];
1289	>
1290	>	public static final Item[] negativeItems = negativeSeqItems(SIZE);
1291	>
1292	>	public static final Item minusOne   = negativeItems[1];
1293	>	public static final Item minusTwo   = negativeItems[2];
1294	>	public static final Item minusThree = negativeItems[3];
1295	>	public static final Item minusFour  = negativeItems[4];
1296	>	public static final Item minusFive  = negativeItems[5];
1297	>	public static final Item minusSix   = negativeItems[6];
1298	>	public static final Item minusSeven = negativeItems[7];
1299	>	public static final Item minusEight = negativeItems[8];
1300	>	public static final Item minusNone  = negativeItems[9];
1301	>	public static final Item minusTen   = negativeItems[10];
1302	>
1303	>	// elements expected to be missing
1304	>	public static final Item fortytwo = new Item(42);
1305	>	public static final Item eightysix = new Item(86);
1306	>	public static final Item ninetynine = new Item(99);
1307	>
1308	>	// Interop across Item, int
1309	>
1310	>	static void mustEqual(Item x, Item y) {
1311	>	if (x != y)
1312	>	assertEquals(x.value, y.value);
1313	>	}
1314	>	static void mustEqual(Item x, int y) {
1315	>	assertEquals(x.value, y);
1316	>	}
1317	>	static void mustEqual(int x, Item y) {
1318	>	assertEquals(x, y.value);
1319	>	}
1320	>	static void mustEqual(int x, int y) {
1321	>	assertEquals(x, y);
1322	>	}
1323	>	static void mustEqual(Object x, Object y) {
1324	>	if (x != y)
1325	>	assertEquals(x, y);
1326	>	}
1327	>	static void mustEqual(int x, Object y) {
1328	>	if (y instanceof Item)
1329	>	assertEquals(x, ((Item)y).value);
1330	>	else fail();
1331	>	}
1332	>	static void mustEqual(Object x, int y) {
1333	>	if (x instanceof Item)
1334	>	assertEquals(((Item)x).value, y);
1335	>	else fail();
1336	>	}
1337	>	static void mustEqual(boolean x, boolean y) {
1338	>	assertEquals(x, y);
1339	>	}
1340	>	static void mustEqual(long x, long y) {
1341	>	assertEquals(x, y);
1342	>	}
1343	>	static void mustEqual(double x, double y) {
1344	>	assertEquals(x, y);
1345	>	}
1346	>	static void mustContain(Collection<Item> c, int i) {
1347	>	assertTrue(c.contains(itemFor(i)));
1348	>	}
1349	>	static void mustContain(Collection<Item> c, Item i) {
1350	>	assertTrue(c.contains(i));
1351	>	}
1352	>	static void mustNotContain(Collection<Item> c, int i) {
1353	>	assertFalse(c.contains(itemFor(i)));
1354	>	}
1355	>	static void mustNotContain(Collection<Item> c, Item i) {
1356	>	assertFalse(c.contains(i));
1357	>	}
1358	>	static void mustRemove(Collection<Item> c, int i) {
1359	>	assertTrue(c.remove(itemFor(i)));
1360	>	}
1361	>	static void mustRemove(Collection<Item> c, Item i) {
1362	>	assertTrue(c.remove(i));
1363	>	}
1364	>	static void mustNotRemove(Collection<Item> c, int i) {
1365	>	assertFalse(c.remove(itemFor(i)));
1366	>	}
1367	>	static void mustNotRemove(Collection<Item> c, Item i) {
1368	>	assertFalse(c.remove(i));
1369	>	}
1370	>	static void mustAdd(Collection<Item> c, int i) {
1371	>	assertTrue(c.add(itemFor(i)));
1372	>	}
1373	>	static void mustAdd(Collection<Item> c, Item i) {
1374	>	assertTrue(c.add(i));
1375	>	}
1376	>	static void mustOffer(Queue<Item> c, int i) {
1377	>	assertTrue(c.offer(itemFor(i)));
1378	>	}
1379	>	static void mustOffer(Queue<Item> c, Item i) {
1380	>	assertTrue(c.offer(i));
1381	>	}
1382	>
1383	>	/**
1384	>	* Runs Runnable r with a security policy that permits precisely
1385	>	* the specified permissions.  If there is no current security
1386	>	* manager, the runnable is run twice, both with and without a
1387	>	* security manager.  We require that any security manager permit
1388	>	* getPolicy/setPolicy.
1389	>	*/
1390	>	@SuppressWarnings("removal")
1391	>	public void runWithPermissions(Runnable r, Permission... permissions) {
1392	>	SecurityManager sm = System.getSecurityManager();
1393	>	if (sm == null) {
1394	>	r.run();
1395	>	}
1396	>	runWithSecurityManagerWithPermissions(r, permissions);
1397	>	}
1398	>
1399	>	/**
1400	>	* Runs Runnable r with a security policy that permits precisely
1401	>	* the specified permissions.  If there is no current security
1402	>	* manager, a temporary one is set for the duration of the
1403	>	* Runnable.  We require that any security manager permit
1404	>	* getPolicy/setPolicy.
1405	>	*/
1406	>	@SuppressWarnings("removal")
1407	>	public void runWithSecurityManagerWithPermissions(Runnable r,
1408	>	Permission... permissions) {
1409	>	if (!useSecurityManager) return;
1410	>	SecurityManager sm = System.getSecurityManager();
1411	>	if (sm == null) {
1412	>	Policy savedPolicy = Policy.getPolicy();
1413		try {
1414	<	Thread.sleep(SHORT_DELAY_MS);
1415	<	threadFail("should throw IE");
1414	>	Policy.setPolicy(permissivePolicy());
1415	>	System.setSecurityManager(new SecurityManager());
1416	>	runWithSecurityManagerWithPermissions(r, permissions);
1417	>	} catch (UnsupportedOperationException ok) {
1418	>	} finally {
1419	>	try {
1420	>	System.setSecurityManager(null);
1421	>	Policy.setPolicy(savedPolicy);
1422	>	} catch (Exception ok) {
1423	>	}
1424		}
1425	<	catch(InterruptedException success) {
1425	>	} else {
1426	>	Policy savedPolicy = Policy.getPolicy();
1427	>	AdjustablePolicy policy = new AdjustablePolicy(permissions);
1428	>	Policy.setPolicy(policy);
1429	>
1430	>	try {
1431	>	r.run();
1432	>	} finally {
1433	>	policy.addPermission(new SecurityPermission("setPolicy"));
1434	>	Policy.setPolicy(savedPolicy);
1435		}
1436		}
1437		}
1438
1439	<	public class SmallRunnable implements Runnable {
1440	<	public void run() {
1441	<	try {
1442	<	Thread.sleep(SMALL_DELAY_MS);
1439	>	/**
1440	>	* Runs a runnable without any permissions.
1441	>	*/
1442	>	public void runWithoutPermissions(Runnable r) {
1443	>	runWithPermissions(r);
1444	>	}
1445	>
1446	>	/**
1447	>	* A security policy where new permissions can be dynamically added
1448	>	* or all cleared.
1449	>	*/
1450	>	@SuppressWarnings("removal")
1451	>	public static class AdjustablePolicy extends java.security.Policy {
1452	>	Permissions perms = new Permissions();
1453	>	AdjustablePolicy(Permission... permissions) {
1454	>	for (Permission permission : permissions)
1455	>	perms.add(permission);
1456	>	}
1457	>	void addPermission(Permission perm) { perms.add(perm); }
1458	>	void clearPermissions() { perms = new Permissions(); }
1459	>	public PermissionCollection getPermissions(CodeSource cs) {
1460	>	return perms;
1461	>	}
1462	>	public PermissionCollection getPermissions(ProtectionDomain pd) {
1463	>	return perms;
1464	>	}
1465	>	public boolean implies(ProtectionDomain pd, Permission p) {
1466	>	return perms.implies(p);
1467	>	}
1468	>	public void refresh() {}
1469	>	public String toString() {
1470	>	List<Permission> ps = new ArrayList<>();
1471	>	for (Enumeration<Permission> e = perms.elements(); e.hasMoreElements();)
1472	>	ps.add(e.nextElement());
1473	>	return "AdjustablePolicy with permissions " + ps;
1474	>	}
1475	>	}
1476	>
1477	>	/**
1478	>	* Returns a policy containing all the permissions we ever need.
1479	>	*/
1480	>	@SuppressWarnings("removal")
1481	>	public static Policy permissivePolicy() {
1482	>	return new AdjustablePolicy
1483	>	// Permissions j.u.c. needs directly
1484	>	(new RuntimePermission("modifyThread"),
1485	>	new RuntimePermission("getClassLoader"),
1486	>	new RuntimePermission("setContextClassLoader"),
1487	>	// Permissions needed to change permissions!
1488	>	new SecurityPermission("getPolicy"),
1489	>	new SecurityPermission("setPolicy"),
1490	>	new RuntimePermission("setSecurityManager"),
1491	>	// Permissions needed by the junit test harness
1492	>	new RuntimePermission("accessDeclaredMembers"),
1493	>	new PropertyPermission("*", "read"),
1494	>	new java.io.FilePermission("<<ALL FILES>>", "read"));
1495	>	}
1496	>
1497	>	/**
1498	>	* Sleeps until the given time has elapsed.
1499	>	* Throws AssertionError if interrupted.
1500	>	*/
1501	>	static void sleep(long millis) {
1502	>	try {
1503	>	delay(millis);
1504	>	} catch (InterruptedException fail) {
1505	>	throw new AssertionError("Unexpected InterruptedException", fail);
1506	>	}
1507	>	}
1508	>
1509	>	/**
1510	>	* Spin-waits up to the specified number of milliseconds for the given
1511	>	* thread to enter a wait state: BLOCKED, WAITING, or TIMED_WAITING.
1512	>	* @param waitingForGodot if non-null, an additional condition to satisfy
1513	>	*/
1514	>	void waitForThreadToEnterWaitState(Thread thread, long timeoutMillis,
1515	>	Callable<Boolean> waitingForGodot) {
1516	>	for (long startTime = 0L;;) {
1517	>	switch (thread.getState()) {
1518	>	default: break;
1519	>	case BLOCKED: case WAITING: case TIMED_WAITING:
1520	>	try {
1521	>	if (waitingForGodot == null || waitingForGodot.call())
1522	>	return;
1523	>	} catch (Throwable fail) { threadUnexpectedException(fail); }
1524	>	break;
1525	>	case TERMINATED:
1526	>	fail("Unexpected thread termination");
1527		}
1528	<	catch(Exception e) {
1529	<	threadFail("unexpectedException");
1528	>
1529	>	if (startTime == 0L)
1530	>	startTime = System.nanoTime();
1531	>	else if (millisElapsedSince(startTime) > timeoutMillis) {
1532	>	assertTrue(thread.isAlive());
1533	>	if (waitingForGodot == null
1534	>	|| thread.getState() == Thread.State.RUNNABLE)
1535	>	fail("timed out waiting for thread to enter wait state");
1536	>	else
1537	>	fail("timed out waiting for condition, thread state="
1538	>	+ thread.getState());
1539		}
1540	+	Thread.yield();
1541	+	}
1542	+	}
1543	+
1544	+	/**
1545	+	* Spin-waits up to the specified number of milliseconds for the given
1546	+	* thread to enter a wait state: BLOCKED, WAITING, or TIMED_WAITING.
1547	+	*/
1548	+	void waitForThreadToEnterWaitState(Thread thread, long timeoutMillis) {
1549	+	waitForThreadToEnterWaitState(thread, timeoutMillis, null);
1550	+	}
1551	+
1552	+	/**
1553	+	* Spin-waits up to LONG_DELAY_MS milliseconds for the given thread to
1554	+	* enter a wait state: BLOCKED, WAITING, or TIMED_WAITING.
1555	+	*/
1556	+	void waitForThreadToEnterWaitState(Thread thread) {
1557	+	waitForThreadToEnterWaitState(thread, LONG_DELAY_MS, null);
1558	+	}
1559	+
1560	+	/**
1561	+	* Spin-waits up to LONG_DELAY_MS milliseconds for the given thread to
1562	+	* enter a wait state: BLOCKED, WAITING, or TIMED_WAITING,
1563	+	* and additionally satisfy the given condition.
1564	+	*/
1565	+	void waitForThreadToEnterWaitState(Thread thread,
1566	+	Callable<Boolean> waitingForGodot) {
1567	+	waitForThreadToEnterWaitState(thread, LONG_DELAY_MS, waitingForGodot);
1568	+	}
1569	+
1570	+	/**
1571	+	* Spin-waits up to LONG_DELAY_MS milliseconds for the current thread to
1572	+	* be interrupted.  Clears the interrupt status before returning.
1573	+	*/
1574	+	void awaitInterrupted() {
1575	+	for (long startTime = 0L; !Thread.interrupted(); ) {
1576	+	if (startTime == 0L)
1577	+	startTime = System.nanoTime();
1578	+	else if (millisElapsedSince(startTime) > LONG_DELAY_MS)
1579	+	fail("timed out waiting for thread interrupt");
1580	+	Thread.yield();
1581		}
1582		}
1583
1584	<	public class SmallCallable implements Callable {
1585	<	public Object call() {
1584	>	/**
1585	>	* Returns the number of milliseconds since time given by
1586	>	* startNanoTime, which must have been previously returned from a
1587	>	* call to {@link System#nanoTime()}.
1588	>	*/
1589	>	static long millisElapsedSince(long startNanoTime) {
1590	>	return NANOSECONDS.toMillis(System.nanoTime() - startNanoTime);
1591	>	}
1592	>
1593	>	/**
1594	>	* Checks that timed f.get() returns the expected value, and does not
1595	>	* wait for the timeout to elapse before returning.
1596	>	*/
1597	>	<T> void checkTimedGet(Future<T> f, T expectedValue, long timeoutMillis) {
1598	>	long startTime = System.nanoTime();
1599	>	T actual = null;
1600	>	try {
1601	>	actual = f.get(timeoutMillis, MILLISECONDS);
1602	>	} catch (Throwable fail) { threadUnexpectedException(fail); }
1603	>	assertEquals(expectedValue, actual);
1604	>	if (millisElapsedSince(startTime) > timeoutMillis/2)
1605	>	throw new AssertionError("timed get did not return promptly");
1606	>	}
1607	>
1608	>	<T> void checkTimedGet(Future<T> f, T expectedValue) {
1609	>	checkTimedGet(f, expectedValue, LONG_DELAY_MS);
1610	>	}
1611	>
1612	>	/**
1613	>	* Returns a new started daemon Thread running the given runnable.
1614	>	*/
1615	>	Thread newStartedThread(Runnable runnable) {
1616	>	Thread t = new Thread(runnable);
1617	>	t.setDaemon(true);
1618	>	t.start();
1619	>	return t;
1620	>	}
1621	>
1622	>	/**
1623	>	* Returns a new started daemon Thread running the given action,
1624	>	* wrapped in a CheckedRunnable.
1625	>	*/
1626	>	Thread newStartedThread(Action action) {
1627	>	return newStartedThread(checkedRunnable(action));
1628	>	}
1629	>
1630	>	/**
1631	>	* Waits for the specified time (in milliseconds) for the thread
1632	>	* to terminate (using {@link Thread#join(long)}), else interrupts
1633	>	* the thread (in the hope that it may terminate later) and fails.
1634	>	*/
1635	>	void awaitTermination(Thread thread, long timeoutMillis) {
1636	>	try {
1637	>	thread.join(timeoutMillis);
1638	>	} catch (InterruptedException fail) {
1639	>	threadUnexpectedException(fail);
1640	>	}
1641	>	if (thread.getState() != Thread.State.TERMINATED) {
1642	>	String detail = String.format(
1643	>	"timed out waiting for thread to terminate, thread=%s, state=%s" ,
1644	>	thread, thread.getState());
1645		try {
1646	<	Thread.sleep(SMALL_DELAY_MS);
1647	<	}
1648	<	catch(Exception e) {
1649	<	threadFail("unexpectedException");
1646	>	threadFail(detail);
1647	>	} finally {
1648	>	// Interrupt thread __after__ having reported its stack trace
1649	>	thread.interrupt();
1650		}
227	–	return Boolean.TRUE;
1651		}
1652		}
1653
1654	<	public class SmallInterruptedRunnable implements Runnable {
1655	<	public void run() {
1654	>	/**
1655	>	* Waits for LONG_DELAY_MS milliseconds for the thread to
1656	>	* terminate (using {@link Thread#join(long)}), else interrupts
1657	>	* the thread (in the hope that it may terminate later) and fails.
1658	>	*/
1659	>	void awaitTermination(Thread t) {
1660	>	awaitTermination(t, LONG_DELAY_MS);
1661	>	}
1662	>
1663	>	// Some convenient Runnable classes
1664	>
1665	>	public abstract class CheckedRunnable implements Runnable {
1666	>	protected abstract void realRun() throws Throwable;
1667	>
1668	>	public final void run() {
1669		try {
1670	<	Thread.sleep(SMALL_DELAY_MS);
1671	<	threadFail("should throw IE");
1670	>	realRun();
1671	>	} catch (Throwable fail) {
1672	>	threadUnexpectedException(fail);
1673		}
1674	<	catch(InterruptedException success) {
1674	>	}
1675	>	}
1676	>
1677	>	Runnable checkedRunnable(Action action) {
1678	>	return new CheckedRunnable() {
1679	>	public void realRun() throws Throwable {
1680	>	action.run();
1681	>	}};
1682	>	}
1683	>
1684	>	public abstract class ThreadShouldThrow extends Thread {
1685	>	protected abstract void realRun() throws Throwable;
1686	>
1687	>	final Class<?> exceptionClass;
1688	>
1689	>	<T extends Throwable> ThreadShouldThrow(Class<T> exceptionClass) {
1690	>	this.exceptionClass = exceptionClass;
1691	>	}
1692	>
1693	>	public final void run() {
1694	>	try {
1695	>	realRun();
1696	>	} catch (Throwable t) {
1697	>	if (! exceptionClass.isInstance(t))
1698	>	threadUnexpectedException(t);
1699	>	return;
1700		}
1701	+	threadShouldThrow(exceptionClass.getSimpleName());
1702		}
1703		}
1704
1705	+	public abstract class CheckedInterruptedRunnable implements Runnable {
1706	+	protected abstract void realRun() throws Throwable;
1707
1708	<	public class MediumRunnable implements Runnable {
244	<	public void run() {
1708	>	public final void run() {
1709		try {
1710	<	Thread.sleep(MEDIUM_DELAY_MS);
1710	>	realRun();
1711	>	} catch (InterruptedException success) {
1712	>	threadAssertFalse(Thread.interrupted());
1713	>	return;
1714	>	} catch (Throwable fail) {
1715	>	threadUnexpectedException(fail);
1716		}
1717	<	catch(Exception e) {
1718	<	threadFail("unexpectedException");
1717	>	threadShouldThrow("InterruptedException");
1718	>	}
1719	>	}
1720	>
1721	>	public abstract class CheckedCallable<T> implements Callable<T> {
1722	>	protected abstract T realCall() throws Throwable;
1723	>
1724	>	public final T call() {
1725	>	try {
1726	>	return realCall();
1727	>	} catch (Throwable fail) {
1728	>	threadUnexpectedException(fail);
1729		}
1730	+	throw new AssertionError("unreached");
1731		}
1732		}
1733
1734	<	public class MediumInterruptedRunnable implements Runnable {
1734	>	public static class NoOpRunnable implements Runnable {
1735	>	public void run() {}
1736	>	}
1737	>
1738	>	public static class NoOpCallable implements Callable<Object> {
1739	>	public Object call() { return Boolean.TRUE; }
1740	>	}
1741	>
1742	>	public static final String TEST_STRING = "a test string";
1743	>
1744	>	public static class StringTask implements Callable<String> {
1745	>	final String value;
1746	>	public StringTask() { this(TEST_STRING); }
1747	>	public StringTask(String value) { this.value = value; }
1748	>	public String call() { return value; }
1749	>	}
1750	>
1751	>	public Callable<String> latchAwaitingStringTask(final CountDownLatch latch) {
1752	>	return new CheckedCallable<String>() {
1753	>	protected String realCall() {
1754	>	try {
1755	>	latch.await();
1756	>	} catch (InterruptedException quittingTime) {}
1757	>	return TEST_STRING;
1758	>	}};
1759	>	}
1760	>
1761	>	public Runnable countDowner(final CountDownLatch latch) {
1762	>	return new CheckedRunnable() {
1763	>	public void realRun() throws InterruptedException {
1764	>	latch.countDown();
1765	>	}};
1766	>	}
1767	>
1768	>	class LatchAwaiter extends CheckedRunnable {
1769	>	static final int NEW = 0;
1770	>	static final int RUNNING = 1;
1771	>	static final int DONE = 2;
1772	>	final CountDownLatch latch;
1773	>	int state = NEW;
1774	>	LatchAwaiter(CountDownLatch latch) { this.latch = latch; }
1775	>	public void realRun() throws InterruptedException {
1776	>	state = 1;
1777	>	await(latch);
1778	>	state = 2;
1779	>	}
1780	>	}
1781	>
1782	>	public LatchAwaiter awaiter(CountDownLatch latch) {
1783	>	return new LatchAwaiter(latch);
1784	>	}
1785	>
1786	>	public void await(CountDownLatch latch, long timeoutMillis) {
1787	>	boolean timedOut = false;
1788	>	try {
1789	>	timedOut = !latch.await(timeoutMillis, MILLISECONDS);
1790	>	} catch (Throwable fail) {
1791	>	threadUnexpectedException(fail);
1792	>	}
1793	>	if (timedOut)
1794	>	fail("timed out waiting for CountDownLatch for "
1795	>	+ (timeoutMillis/1000) + " sec");
1796	>	}
1797	>
1798	>	public void await(CountDownLatch latch) {
1799	>	await(latch, LONG_DELAY_MS);
1800	>	}
1801	>
1802	>	public void await(Semaphore semaphore) {
1803	>	boolean timedOut = false;
1804	>	try {
1805	>	timedOut = !semaphore.tryAcquire(LONG_DELAY_MS, MILLISECONDS);
1806	>	} catch (Throwable fail) {
1807	>	threadUnexpectedException(fail);
1808	>	}
1809	>	if (timedOut)
1810	>	fail("timed out waiting for Semaphore for "
1811	>	+ (LONG_DELAY_MS/1000) + " sec");
1812	>	}
1813	>
1814	>	public void await(CyclicBarrier barrier) {
1815	>	try {
1816	>	barrier.await(LONG_DELAY_MS, MILLISECONDS);
1817	>	} catch (Throwable fail) {
1818	>	threadUnexpectedException(fail);
1819	>	}
1820	>	}
1821	>
1822	>	//     /**
1823	>	//      * Spin-waits up to LONG_DELAY_MS until flag becomes true.
1824	>	//      */
1825	>	//     public void await(AtomicBoolean flag) {
1826	>	//         await(flag, LONG_DELAY_MS);
1827	>	//     }
1828	>
1829	>	//     /**
1830	>	//      * Spin-waits up to the specified timeout until flag becomes true.
1831	>	//      */
1832	>	//     public void await(AtomicBoolean flag, long timeoutMillis) {
1833	>	//         long startTime = System.nanoTime();
1834	>	//         while (!flag.get()) {
1835	>	//             if (millisElapsedSince(startTime) > timeoutMillis)
1836	>	//                 throw new AssertionError("timed out");
1837	>	//             Thread.yield();
1838	>	//         }
1839	>	//     }
1840	>
1841	>	public static class NPETask implements Callable<String> {
1842	>	public String call() { throw new NullPointerException(); }
1843	>	}
1844	>
1845	>	public Runnable possiblyInterruptedRunnable(final long timeoutMillis) {
1846	>	return new CheckedRunnable() {
1847	>	protected void realRun() {
1848	>	try {
1849	>	delay(timeoutMillis);
1850	>	} catch (InterruptedException ok) {}
1851	>	}};
1852	>	}
1853	>
1854	>	/**
1855	>	* For use as ThreadFactory in constructors
1856	>	*/
1857	>	public static class SimpleThreadFactory implements ThreadFactory {
1858	>	public Thread newThread(Runnable r) {
1859	>	return new Thread(r);
1860	>	}
1861	>	}
1862	>
1863	>	public interface TrackedRunnable extends Runnable {
1864	>	boolean isDone();
1865	>	}
1866	>
1867	>	public static class TrackedNoOpRunnable implements Runnable {
1868	>	public volatile boolean done = false;
1869		public void run() {
1870	+	done = true;
1871	+	}
1872	+	}
1873	+
1874	+	/**
1875	+	* Analog of CheckedRunnable for RecursiveAction
1876	+	*/
1877	+	public abstract class CheckedRecursiveAction extends RecursiveAction {
1878	+	protected abstract void realCompute() throws Throwable;
1879	+
1880	+	@Override protected final void compute() {
1881		try {
1882	<	Thread.sleep(MEDIUM_DELAY_MS);
1883	<	threadFail("should throw IE");
1882	>	realCompute();
1883	>	} catch (Throwable fail) {
1884	>	threadUnexpectedException(fail);
1885		}
1886	<	catch(InterruptedException success) {
1886	>	}
1887	>	}
1888	>
1889	>	/**
1890	>	* Analog of CheckedCallable for RecursiveTask
1891	>	*/
1892	>	public abstract class CheckedRecursiveTask<T> extends RecursiveTask<T> {
1893	>	protected abstract T realCompute() throws Throwable;
1894	>
1895	>	@Override protected final T compute() {
1896	>	try {
1897	>	return realCompute();
1898	>	} catch (Throwable fail) {
1899	>	threadUnexpectedException(fail);
1900		}
1901	+	throw new AssertionError("unreached");
1902		}
1903		}
1904
1905	<	public class MediumPossiblyInterruptedRunnable implements Runnable {
1906	<	public void run() {
1905	>	/**
1906	>	* For use as RejectedExecutionHandler in constructors
1907	>	*/
1908	>	public static class NoOpREHandler implements RejectedExecutionHandler {
1909	>	public void rejectedExecution(Runnable r,
1910	>	ThreadPoolExecutor executor) {}
1911	>	}
1912	>
1913	>	/**
1914	>	* A CyclicBarrier that uses timed await and fails with
1915	>	* AssertionErrors instead of throwing checked exceptions.
1916	>	*/
1917	>	public static class CheckedBarrier extends CyclicBarrier {
1918	>	public CheckedBarrier(int parties) { super(parties); }
1919	>
1920	>	public int await() {
1921		try {
1922	<	Thread.sleep(MEDIUM_DELAY_MS);
1922	>	return super.await(LONGER_DELAY_MS, MILLISECONDS);
1923	>	} catch (TimeoutException timedOut) {
1924	>	throw new AssertionError("timed out");
1925	>	} catch (Exception fail) {
1926	>	throw new AssertionError("Unexpected exception: " + fail, fail);
1927		}
1928	<	catch(InterruptedException success) {
1928	>	}
1929	>	}
1930	>
1931	>	void checkEmpty(BlockingQueue<?> q) {
1932	>	try {
1933	>	assertTrue(q.isEmpty());
1934	>	assertEquals(0, q.size());
1935	>	assertNull(q.peek());
1936	>	assertNull(q.poll());
1937	>	assertNull(q.poll(randomExpiredTimeout(), randomTimeUnit()));
1938	>	assertEquals(q.toString(), "[]");
1939	>	assertTrue(Arrays.equals(q.toArray(), new Object[0]));
1940	>	assertFalse(q.iterator().hasNext());
1941	>	try {
1942	>	q.element();
1943	>	shouldThrow();
1944	>	} catch (NoSuchElementException success) {}
1945	>	try {
1946	>	q.iterator().next();
1947	>	shouldThrow();
1948	>	} catch (NoSuchElementException success) {}
1949	>	try {
1950	>	q.remove();
1951	>	shouldThrow();
1952	>	} catch (NoSuchElementException success) {}
1953	>	} catch (InterruptedException fail) { threadUnexpectedException(fail); }
1954	>	}
1955	>
1956	>	void assertSerialEquals(Object x, Object y) {
1957	>	assertTrue(Arrays.equals(serialBytes(x), serialBytes(y)));
1958	>	}
1959	>
1960	>	void assertNotSerialEquals(Object x, Object y) {
1961	>	assertFalse(Arrays.equals(serialBytes(x), serialBytes(y)));
1962	>	}
1963	>
1964	>	byte[] serialBytes(Object o) {
1965	>	try {
1966	>	ByteArrayOutputStream bos = new ByteArrayOutputStream();
1967	>	ObjectOutputStream oos = new ObjectOutputStream(bos);
1968	>	oos.writeObject(o);
1969	>	oos.flush();
1970	>	oos.close();
1971	>	return bos.toByteArray();
1972	>	} catch (Throwable fail) {
1973	>	threadUnexpectedException(fail);
1974	>	return new byte[0];
1975	>	}
1976	>	}
1977	>
1978	>	@SuppressWarnings("unchecked")
1979	>	void assertImmutable(Object o) {
1980	>	if (o instanceof Collection) {
1981	>	assertThrows(
1982	>	UnsupportedOperationException.class,
1983	>	() -> ((Collection) o).add(null));
1984	>	}
1985	>	}
1986	>
1987	>	@SuppressWarnings("unchecked")
1988	>	<T> T serialClone(T o) {
1989	>	T clone = null;
1990	>	try {
1991	>	ObjectInputStream ois = new ObjectInputStream
1992	>	(new ByteArrayInputStream(serialBytes(o)));
1993	>	clone = (T) ois.readObject();
1994	>	} catch (Throwable fail) {
1995	>	threadUnexpectedException(fail);
1996	>	}
1997	>	if (o == clone) assertImmutable(o);
1998	>	else assertSame(o.getClass(), clone.getClass());
1999	>	return clone;
2000	>	}
2001	>
2002	>	/**
2003	>	* A version of serialClone that leaves error handling (for
2004	>	* e.g. NotSerializableException) up to the caller.
2005	>	*/
2006	>	@SuppressWarnings("unchecked")
2007	>	<T> T serialClonePossiblyFailing(T o)
2008	>	throws ReflectiveOperationException, java.io.IOException {
2009	>	ByteArrayOutputStream bos = new ByteArrayOutputStream();
2010	>	ObjectOutputStream oos = new ObjectOutputStream(bos);
2011	>	oos.writeObject(o);
2012	>	oos.flush();
2013	>	oos.close();
2014	>	ObjectInputStream ois = new ObjectInputStream
2015	>	(new ByteArrayInputStream(bos.toByteArray()));
2016	>	T clone = (T) ois.readObject();
2017	>	if (o == clone) assertImmutable(o);
2018	>	else assertSame(o.getClass(), clone.getClass());
2019	>	return clone;
2020	>	}
2021	>
2022	>	/**
2023	>	* If o implements Cloneable and has a public clone method,
2024	>	* returns a clone of o, else null.
2025	>	*/
2026	>	@SuppressWarnings("unchecked")
2027	>	<T> T cloneableClone(T o) {
2028	>	if (!(o instanceof Cloneable)) return null;
2029	>	final T clone;
2030	>	try {
2031	>	clone = (T) o.getClass().getMethod("clone").invoke(o);
2032	>	} catch (NoSuchMethodException ok) {
2033	>	return null;
2034	>	} catch (ReflectiveOperationException unexpected) {
2035	>	throw new Error(unexpected);
2036	>	}
2037	>	assertNotSame(o, clone); // not 100% guaranteed by spec
2038	>	assertSame(o.getClass(), clone.getClass());
2039	>	return clone;
2040	>	}
2041	>
2042	>	public void assertThrows(Class<? extends Throwable> expectedExceptionClass,
2043	>	Action... throwingActions) {
2044	>	for (Action throwingAction : throwingActions) {
2045	>	boolean threw = false;
2046	>	try { throwingAction.run(); }
2047	>	catch (Throwable t) {
2048	>	threw = true;
2049	>	if (!expectedExceptionClass.isInstance(t))
2050	>	throw new AssertionError(
2051	>	"Expected " + expectedExceptionClass.getName() +
2052	>	", got " + t.getClass().getName(),
2053	>	t);
2054	>	}
2055	>	if (!threw)
2056	>	shouldThrow(expectedExceptionClass.getName());
2057	>	}
2058	>	}
2059	>
2060	>	public void assertIteratorExhausted(Iterator<?> it) {
2061	>	try {
2062	>	it.next();
2063	>	shouldThrow();
2064	>	} catch (NoSuchElementException success) {}
2065	>	assertFalse(it.hasNext());
2066	>	}
2067	>
2068	>	public <T> Callable<T> callableThrowing(final Exception ex) {
2069	>	return new Callable<T>() { public T call() throws Exception { throw ex; }};
2070	>	}
2071	>
2072	>	public Runnable runnableThrowing(final RuntimeException ex) {
2073	>	return new Runnable() { public void run() { throw ex; }};
2074	>	}
2075	>
2076	>	/** A reusable thread pool to be shared by tests. */
2077	>	static final ExecutorService cachedThreadPool =
2078	>	new ThreadPoolExecutor(0, Integer.MAX_VALUE,
2079	>	1000L, MILLISECONDS,
2080	>	new SynchronousQueue<Runnable>());
2081	>
2082	>	static <T> void shuffle(T[] array) {
2083	>	Collections.shuffle(Arrays.asList(array), ThreadLocalRandom.current());
2084	>	}
2085	>
2086	>	/**
2087	>	* Returns the same String as would be returned by {@link
2088	>	* Object#toString}, whether or not the given object's class
2089	>	* overrides toString().
2090	>	*
2091	>	* @see System#identityHashCode
2092	>	*/
2093	>	static String identityString(Object x) {
2094	>	return x.getClass().getName()
2095	>	+ "@" + Integer.toHexString(System.identityHashCode(x));
2096	>	}
2097	>
2098	>	// --- Shared assertions for Executor tests ---
2099	>
2100	>	/**
2101	>	* Returns maximum number of tasks that can be submitted to given
2102	>	* pool (with bounded queue) before saturation (when submission
2103	>	* throws RejectedExecutionException).
2104	>	*/
2105	>	static final int saturatedSize(ThreadPoolExecutor pool) {
2106	>	BlockingQueue<Runnable> q = pool.getQueue();
2107	>	return pool.getMaximumPoolSize() + q.size() + q.remainingCapacity();
2108	>	}
2109	>
2110	>	@SuppressWarnings("FutureReturnValueIgnored")
2111	>	void assertNullTaskSubmissionThrowsNullPointerException(Executor e) {
2112	>	try {
2113	>	e.execute((Runnable) null);
2114	>	shouldThrow();
2115	>	} catch (NullPointerException success) {}
2116	>
2117	>	if (! (e instanceof ExecutorService)) return;
2118	>	ExecutorService es = (ExecutorService) e;
2119	>	try {
2120	>	es.submit((Runnable) null);
2121	>	shouldThrow();
2122	>	} catch (NullPointerException success) {}
2123	>	try {
2124	>	es.submit((Runnable) null, Boolean.TRUE);
2125	>	shouldThrow();
2126	>	} catch (NullPointerException success) {}
2127	>	try {
2128	>	es.submit((Callable<?>) null);
2129	>	shouldThrow();
2130	>	} catch (NullPointerException success) {}
2131	>
2132	>	if (! (e instanceof ScheduledExecutorService)) return;
2133	>	ScheduledExecutorService ses = (ScheduledExecutorService) e;
2134	>	try {
2135	>	ses.schedule((Runnable) null,
2136	>	randomTimeout(), randomTimeUnit());
2137	>	shouldThrow();
2138	>	} catch (NullPointerException success) {}
2139	>	try {
2140	>	ses.schedule((Callable<?>) null,
2141	>	randomTimeout(), randomTimeUnit());
2142	>	shouldThrow();
2143	>	} catch (NullPointerException success) {}
2144	>	try {
2145	>	ses.scheduleAtFixedRate((Runnable) null,
2146	>	randomTimeout(), LONG_DELAY_MS, MILLISECONDS);
2147	>	shouldThrow();
2148	>	} catch (NullPointerException success) {}
2149	>	try {
2150	>	ses.scheduleWithFixedDelay((Runnable) null,
2151	>	randomTimeout(), LONG_DELAY_MS, MILLISECONDS);
2152	>	shouldThrow();
2153	>	} catch (NullPointerException success) {}
2154	>	}
2155	>
2156	>	void setRejectedExecutionHandler(
2157	>	ThreadPoolExecutor p, RejectedExecutionHandler handler) {
2158	>	p.setRejectedExecutionHandler(handler);
2159	>	assertSame(handler, p.getRejectedExecutionHandler());
2160	>	}
2161	>
2162	>	void assertTaskSubmissionsAreRejected(ThreadPoolExecutor p) {
2163	>	final RejectedExecutionHandler savedHandler = p.getRejectedExecutionHandler();
2164	>	final long savedTaskCount = p.getTaskCount();
2165	>	final long savedCompletedTaskCount = p.getCompletedTaskCount();
2166	>	final int savedQueueSize = p.getQueue().size();
2167	>	final boolean stock = (p.getClass().getClassLoader() == null);
2168	>
2169	>	Runnable r = () -> {};
2170	>	Callable<Boolean> c = () -> Boolean.TRUE;
2171	>
2172	>	class Recorder implements RejectedExecutionHandler {
2173	>	public volatile Runnable r = null;
2174	>	public volatile ThreadPoolExecutor p = null;
2175	>	public void reset() { r = null; p = null; }
2176	>	public void rejectedExecution(Runnable r, ThreadPoolExecutor p) {
2177	>	assertNull(this.r);
2178	>	assertNull(this.p);
2179	>	this.r = r;
2180	>	this.p = p;
2181	>	}
2182	>	}
2183	>
2184	>	// check custom handler is invoked exactly once per task
2185	>	Recorder recorder = new Recorder();
2186	>	setRejectedExecutionHandler(p, recorder);
2187	>	for (int i = 2; i--> 0; ) {
2188	>	recorder.reset();
2189	>	p.execute(r);
2190	>	if (stock && p.getClass() == ThreadPoolExecutor.class)
2191	>	assertSame(r, recorder.r);
2192	>	assertSame(p, recorder.p);
2193	>
2194	>	recorder.reset();
2195	>	assertFalse(p.submit(r).isDone());
2196	>	if (stock) assertTrue(!((FutureTask) recorder.r).isDone());
2197	>	assertSame(p, recorder.p);
2198	>
2199	>	recorder.reset();
2200	>	assertFalse(p.submit(r, Boolean.TRUE).isDone());
2201	>	if (stock) assertTrue(!((FutureTask) recorder.r).isDone());
2202	>	assertSame(p, recorder.p);
2203	>
2204	>	recorder.reset();
2205	>	assertFalse(p.submit(c).isDone());
2206	>	if (stock) assertTrue(!((FutureTask) recorder.r).isDone());
2207	>	assertSame(p, recorder.p);
2208	>
2209	>	if (p instanceof ScheduledExecutorService) {
2210	>	ScheduledExecutorService s = (ScheduledExecutorService) p;
2211	>	ScheduledFuture<?> future;
2212	>
2213	>	recorder.reset();
2214	>	future = s.schedule(r, randomTimeout(), randomTimeUnit());
2215	>	assertFalse(future.isDone());
2216	>	if (stock) assertTrue(!((FutureTask) recorder.r).isDone());
2217	>	assertSame(p, recorder.p);
2218	>
2219	>	recorder.reset();
2220	>	future = s.schedule(c, randomTimeout(), randomTimeUnit());
2221	>	assertFalse(future.isDone());
2222	>	if (stock) assertTrue(!((FutureTask) recorder.r).isDone());
2223	>	assertSame(p, recorder.p);
2224	>
2225	>	recorder.reset();
2226	>	future = s.scheduleAtFixedRate(r, randomTimeout(), LONG_DELAY_MS, MILLISECONDS);
2227	>	assertFalse(future.isDone());
2228	>	if (stock) assertTrue(!((FutureTask) recorder.r).isDone());
2229	>	assertSame(p, recorder.p);
2230	>
2231	>	recorder.reset();
2232	>	future = s.scheduleWithFixedDelay(r, randomTimeout(), LONG_DELAY_MS, MILLISECONDS);
2233	>	assertFalse(future.isDone());
2234	>	if (stock) assertTrue(!((FutureTask) recorder.r).isDone());
2235	>	assertSame(p, recorder.p);
2236	>	}
2237	>	}
2238	>
2239	>	// Checking our custom handler above should be sufficient, but
2240	>	// we add some integration tests of standard handlers.
2241	>	final AtomicReference<Thread> thread = new AtomicReference<>();
2242	>	final Runnable setThread = () -> thread.set(Thread.currentThread());
2243	>
2244	>	setRejectedExecutionHandler(p, new ThreadPoolExecutor.AbortPolicy());
2245	>	try {
2246	>	p.execute(setThread);
2247	>	shouldThrow();
2248	>	} catch (RejectedExecutionException success) {}
2249	>	assertNull(thread.get());
2250	>
2251	>	setRejectedExecutionHandler(p, new ThreadPoolExecutor.DiscardPolicy());
2252	>	p.execute(setThread);
2253	>	assertNull(thread.get());
2254	>
2255	>	setRejectedExecutionHandler(p, new ThreadPoolExecutor.CallerRunsPolicy());
2256	>	p.execute(setThread);
2257	>	if (p.isShutdown())
2258	>	assertNull(thread.get());
2259	>	else
2260	>	assertSame(Thread.currentThread(), thread.get());
2261	>
2262	>	setRejectedExecutionHandler(p, savedHandler);
2263	>
2264	>	// check that pool was not perturbed by handlers
2265	>	assertEquals(savedTaskCount, p.getTaskCount());
2266	>	assertEquals(savedCompletedTaskCount, p.getCompletedTaskCount());
2267	>	assertEquals(savedQueueSize, p.getQueue().size());
2268	>	}
2269	>
2270	>	void assertCollectionsEquals(Collection<?> x, Collection<?> y) {
2271	>	assertEquals(x, y);
2272	>	assertEquals(y, x);
2273	>	assertEquals(x.isEmpty(), y.isEmpty());
2274	>	assertEquals(x.size(), y.size());
2275	>	if (x instanceof List) {
2276	>	assertEquals(x.toString(), y.toString());
2277	>	}
2278	>	if (x instanceof List || x instanceof Set) {
2279	>	assertEquals(x.hashCode(), y.hashCode());
2280	>	}
2281	>	if (x instanceof List || x instanceof Deque) {
2282	>	assertTrue(Arrays.equals(x.toArray(), y.toArray()));
2283	>	assertTrue(Arrays.equals(x.toArray(new Object[0]),
2284	>	y.toArray(new Object[0])));
2285	>	}
2286	>	}
2287	>
2288	>	/**
2289	>	* A weaker form of assertCollectionsEquals which does not insist
2290	>	* that the two collections satisfy Object#equals(Object), since
2291	>	* they may use identity semantics as Deques do.
2292	>	*/
2293	>	void assertCollectionsEquivalent(Collection<?> x, Collection<?> y) {
2294	>	if (x instanceof List || x instanceof Set)
2295	>	assertCollectionsEquals(x, y);
2296	>	else {
2297	>	assertEquals(x.isEmpty(), y.isEmpty());
2298	>	assertEquals(x.size(), y.size());
2299	>	assertEquals(new HashSet<Object>(x), new HashSet<Object>(y));
2300	>	if (x instanceof Deque) {
2301	>	assertTrue(Arrays.equals(x.toArray(), y.toArray()));
2302	>	assertTrue(Arrays.equals(x.toArray(new Object[0]),
2303	>	y.toArray(new Object[0])));
2304		}
2305		}
2306		}
274	–
2307		}

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