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

Comparing jsr166/src/test/tck/JSR166TestCase.java (file contents):
Revision 1.26 by dl, Thu Mar 31 15:24:29 2005 UTC vs.
Revision 1.243 by jsr166, Thu Apr 5 03:36:54 2018 UTC

#	Line 1 | Line 1
1		/*
2	<	* Written by Doug Lea with assistance from members of JCP JSR-166
3	<	* Expert Group and released to the public domain, as explained at
4	<	* http://creativecommons.org/licenses/publicdomain
5	<	* Other contributors include Andrew Wright, Jeffrey Hayes,
6	<	* Pat Fisher, 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.*;
14	<	import java.security.*;
10	>	/*
11	>	* @test
12	>	* @summary JSR-166 tck tests, in a number of variations.
13	>	*          The first is the conformance testing variant,
14	>	*          while others also test implementation details.
15	>	* @build *
16	>	* @modules java.management
17	>	* @run junit/othervm/timeout=1000 JSR166TestCase
18	>	* @run junit/othervm/timeout=1000
19	>	*      --add-opens java.base/java.util.concurrent=ALL-UNNAMED
20	>	*      --add-opens java.base/java.lang=ALL-UNNAMED
21	>	*      -Djsr166.testImplementationDetails=true
22	>	*      JSR166TestCase
23	>	* @run junit/othervm/timeout=1000
24	>	*      --add-opens java.base/java.util.concurrent=ALL-UNNAMED
25	>	*      --add-opens java.base/java.lang=ALL-UNNAMED
26	>	*      -Djsr166.testImplementationDetails=true
27	>	*      -Djava.util.concurrent.ForkJoinPool.common.parallelism=0
28	>	*      JSR166TestCase
29	>	* @run junit/othervm/timeout=1000
30	>	*      --add-opens java.base/java.util.concurrent=ALL-UNNAMED
31	>	*      --add-opens java.base/java.lang=ALL-UNNAMED
32	>	*      -Djsr166.testImplementationDetails=true
33	>	*      -Djava.util.concurrent.ForkJoinPool.common.parallelism=1
34	>	*      -Djava.util.secureRandomSeed=true
35	>	*      JSR166TestCase
36	>	* @run junit/othervm/timeout=1000/policy=tck.policy
37	>	*      --add-opens java.base/java.util.concurrent=ALL-UNNAMED
38	>	*      --add-opens java.base/java.lang=ALL-UNNAMED
39	>	*      -Djsr166.testImplementationDetails=true
40	>	*      JSR166TestCase
41	>	*/
42	>
43	>	import static java.util.concurrent.TimeUnit.MILLISECONDS;
44	>	import static java.util.concurrent.TimeUnit.MINUTES;
45	>	import static java.util.concurrent.TimeUnit.NANOSECONDS;
46	>
47	>	import java.io.ByteArrayInputStream;
48	>	import java.io.ByteArrayOutputStream;
49	>	import java.io.ObjectInputStream;
50	>	import java.io.ObjectOutputStream;
51	>	import java.lang.management.ManagementFactory;
52	>	import java.lang.management.ThreadInfo;
53	>	import java.lang.management.ThreadMXBean;
54	>	import java.lang.reflect.Constructor;
55	>	import java.lang.reflect.Method;
56	>	import java.lang.reflect.Modifier;
57	>	import java.security.CodeSource;
58	>	import java.security.Permission;
59	>	import java.security.PermissionCollection;
60	>	import java.security.Permissions;
61	>	import java.security.Policy;
62	>	import java.security.ProtectionDomain;
63	>	import java.security.SecurityPermission;
64	>	import java.util.ArrayList;
65	>	import java.util.Arrays;
66	>	import java.util.Collection;
67	>	import java.util.Collections;
68	>	import java.util.Date;
69	>	import java.util.Deque;
70	>	import java.util.Enumeration;
71	>	import java.util.HashSet;
72	>	import java.util.Iterator;
73	>	import java.util.List;
74	>	import java.util.NoSuchElementException;
75	>	import java.util.PropertyPermission;
76	>	import java.util.Set;
77	>	import java.util.concurrent.BlockingQueue;
78	>	import java.util.concurrent.Callable;
79	>	import java.util.concurrent.CountDownLatch;
80	>	import java.util.concurrent.CyclicBarrier;
81	>	import java.util.concurrent.ExecutionException;
82	>	import java.util.concurrent.Executor;
83	>	import java.util.concurrent.Executors;
84	>	import java.util.concurrent.ExecutorService;
85	>	import java.util.concurrent.ForkJoinPool;
86	>	import java.util.concurrent.Future;
87	>	import java.util.concurrent.FutureTask;
88	>	import java.util.concurrent.RecursiveAction;
89	>	import java.util.concurrent.RecursiveTask;
90	>	import java.util.concurrent.RejectedExecutionException;
91	>	import java.util.concurrent.RejectedExecutionHandler;
92	>	import java.util.concurrent.Semaphore;
93	>	import java.util.concurrent.ScheduledExecutorService;
94	>	import java.util.concurrent.ScheduledFuture;
95	>	import java.util.concurrent.SynchronousQueue;
96	>	import java.util.concurrent.ThreadFactory;
97	>	import java.util.concurrent.ThreadLocalRandom;
98	>	import java.util.concurrent.ThreadPoolExecutor;
99	>	import java.util.concurrent.TimeUnit;
100	>	import java.util.concurrent.TimeoutException;
101	>	import java.util.concurrent.atomic.AtomicBoolean;
102	>	import java.util.concurrent.atomic.AtomicReference;
103	>	import java.util.regex.Pattern;
104	>
105	>	import junit.framework.Test;
106	>	import junit.framework.TestCase;
107	>	import junit.framework.TestResult;
108	>	import junit.framework.TestSuite;
109
110		/**
111		* Base class for JSR166 Junit TCK tests.  Defines some constants,
112		* utility methods and classes, as well as a simple framework for
113		* helping to make sure that assertions failing in generated threads
114		* cause the associated test that generated them to itself fail (which
115	<	* JUnit doe not otherwise arrange).  The rules for creating such
115	>	* JUnit does not otherwise arrange).  The rules for creating such
116		* tests are:
117		*
118		* <ol>
119		*
120	<	* <li> All assertions in code running in generated threads must use
121	<	* the forms {@link #threadFail} , {@link #threadAssertTrue} {@link
120	>	* <li>All assertions in code running in generated threads must use
121	>	* the forms {@link #threadFail}, {@link #threadAssertTrue}, {@link
122		* #threadAssertEquals}, or {@link #threadAssertNull}, (not
123	<	* <tt>fail</tt>, <tt>assertTrue</tt>, etc.) It is OK (but not
123	>	* {@code fail}, {@code assertTrue}, etc.) It is OK (but not
124		* particularly recommended) for other code to use these forms too.
125		* Only the most typically used JUnit assertion methods are defined
126	<	* this way, but enough to live with.</li>
126	>	* this way, but enough to live with.
127		*
128	<	* <li> If you override {@link #setUp} or {@link #tearDown}, make sure
129	<	* to invoke <tt>super.setUp</tt> and <tt>super.tearDown</tt> within
128	>	* <li>If you override {@link #setUp} or {@link #tearDown}, make sure
129	>	* to invoke {@code super.setUp} and {@code super.tearDown} within
130		* them. These methods are used to clear and check for thread
131	<	* assertion failures.</li>
131	>	* assertion failures.
132		*
133	<	* <li>All delays and timeouts must use one of the constants <tt>
134	<	* SHORT_DELAY_MS</tt>, <tt> SMALL_DELAY_MS</tt>, <tt> MEDIUM_DELAY_MS</tt>,
135	<	* <tt> LONG_DELAY_MS</tt>. The idea here is that a SHORT is always
133	>	* <li>All delays and timeouts must use one of the constants {@code
134	>	* SHORT_DELAY_MS}, {@code SMALL_DELAY_MS}, {@code MEDIUM_DELAY_MS},
135	>	* {@code LONG_DELAY_MS}. The idea here is that a SHORT is always
136		* discriminable from zero time, and always allows enough time for the
137		* small amounts of computation (creating a thread, calling a few
138		* methods, etc) needed to reach a timeout point. Similarly, a SMALL
139		* is always discriminable as larger than SHORT and smaller than
140		* MEDIUM.  And so on. These constants are set to conservative values,
141		* but even so, if there is ever any doubt, they can all be increased
142	<	* in one spot to rerun tests on slower platforms</li>
142	>	* in one spot to rerun tests on slower platforms.
143		*
144	<	* <li> All threads generated must be joined inside each test case
145	<	* method (or <tt>fail</tt> to do so) before returning from the
146	<	* method. The <tt> joinPool</tt> method can be used to do this when
147	<	* using Executors.</li>
144	>	* <li>All threads generated must be joined inside each test case
145	>	* method (or {@code fail} to do so) before returning from the
146	>	* method. The {@code joinPool} method can be used to do this when
147	>	* using Executors.
148		*
149		* </ol>
150		*
151	<	* <p> <b>Other notes</b>
151	>	* <p><b>Other notes</b>
152		* <ul>
153		*
154	<	* <li> Usually, there is one testcase method per JSR166 method
154	>	* <li>Usually, there is one testcase method per JSR166 method
155		* covering "normal" operation, and then as many exception-testing
156		* methods as there are exceptions the method can throw. Sometimes
157		* there are multiple tests per JSR166 method when the different
158		* "normal" behaviors differ significantly. And sometimes testcases
159	<	* cover multiple methods when they cannot be tested in
160	<	* isolation.</li>
161	<	*
67	<	* <li> The documentation style for testcases is to provide as javadoc
159	>	* cover multiple methods when they cannot be tested in isolation.
160	>	*
161	>	* <li>The documentation style for testcases is to provide as javadoc
162		* a simple sentence or two describing the property that the testcase
163		* method purports to test. The javadocs do not say anything about how
164	<	* the property is tested. To find out, read the code.</li>
164	>	* the property is tested. To find out, read the code.
165		*
166	<	* <li> These tests are "conformance tests", and do not attempt to
166	>	* <li>These tests are "conformance tests", and do not attempt to
167		* test throughput, latency, scalability or other performance factors
168		* (see the separate "jtreg" tests for a set intended to check these
169		* for the most central aspects of functionality.) So, most tests use
170		* the smallest sensible numbers of threads, collection sizes, etc
171	<	* needed to check basic conformance.</li>
171	>	* needed to check basic conformance.
172		*
173		* <li>The test classes currently do not declare inclusion in
174		* any particular package to simplify things for people integrating
175	<	* them in TCK test suites.</li>
175	>	* them in TCK test suites.
176		*
177	<	* <li> As a convenience, the <tt>main</tt> of this class (JSR166TestCase)
178	<	* runs all JSR166 unit tests.</li>
177	>	* <li>As a convenience, the {@code main} of this class (JSR166TestCase)
178	>	* runs all JSR166 unit tests.
179		*
180		* </ul>
181		*/
182		public class JSR166TestCase extends TestCase {
183	+	private static final boolean useSecurityManager =
184	+	Boolean.getBoolean("jsr166.useSecurityManager");
185	+
186	+	protected static final boolean expensiveTests =
187	+	Boolean.getBoolean("jsr166.expensiveTests");
188	+
189	+	/**
190	+	* If true, also run tests that are not part of the official tck
191	+	* because they test unspecified implementation details.
192	+	*/
193	+	protected static final boolean testImplementationDetails =
194	+	Boolean.getBoolean("jsr166.testImplementationDetails");
195	+
196	+	/**
197	+	* If true, report on stdout all "slow" tests, that is, ones that
198	+	* take more than profileThreshold milliseconds to execute.
199	+	*/
200	+	private static final boolean profileTests =
201	+	Boolean.getBoolean("jsr166.profileTests");
202	+
203	+	/**
204	+	* The number of milliseconds that tests are permitted for
205	+	* execution without being reported, when profileTests is set.
206	+	*/
207	+	private static final long profileThreshold =
208	+	Long.getLong("jsr166.profileThreshold", 100);
209	+
210	+	/**
211	+	* The number of repetitions per test (for tickling rare bugs).
212	+	*/
213	+	private static final int runsPerTest =
214	+	Integer.getInteger("jsr166.runsPerTest", 1);
215	+
216	+	/**
217	+	* The number of repetitions of the test suite (for finding leaks?).
218	+	*/
219	+	private static final int suiteRuns =
220	+	Integer.getInteger("jsr166.suiteRuns", 1);
221	+
222	+	/**
223	+	* Returns the value of the system property, or NaN if not defined.
224	+	*/
225	+	private static float systemPropertyValue(String name) {
226	+	String floatString = System.getProperty(name);
227	+	if (floatString == null)
228	+	return Float.NaN;
229	+	try {
230	+	return Float.parseFloat(floatString);
231	+	} catch (NumberFormatException ex) {
232	+	throw new IllegalArgumentException(
233	+	String.format("Bad float value in system property %s=%s",
234	+	name, floatString));
235	+	}
236	+	}
237	+
238		/**
239	<	* Runs all JSR166 unit tests using junit.textui.TestRunner
240	<	*/
241	<	public static void main (String[] args) {
242	<	int iters = 1;
243	<	if (args.length > 0)
244	<	iters = Integer.parseInt(args[0]);
245	<	Test s = suite();
246	<	for (int i = 0; i < iters; ++i) {
247	<	junit.textui.TestRunner.run (s);
239	>	* The scaling factor to apply to standard delays used in tests.
240	>	* May be initialized from any of:
241	>	* - the "jsr166.delay.factor" system property
242	>	* - the "test.timeout.factor" system property (as used by jtreg)
243	>	*   See: http://openjdk.java.net/jtreg/tag-spec.html
244	>	* - hard-coded fuzz factor when using a known slowpoke VM
245	>	*/
246	>	private static final float delayFactor = delayFactor();
247	>
248	>	private static float delayFactor() {
249	>	float x;
250	>	if (!Float.isNaN(x = systemPropertyValue("jsr166.delay.factor")))
251	>	return x;
252	>	if (!Float.isNaN(x = systemPropertyValue("test.timeout.factor")))
253	>	return x;
254	>	String prop = System.getProperty("java.vm.version");
255	>	if (prop != null && prop.matches(".*debug.*"))
256	>	return 4.0f; // How much slower is fastdebug than product?!
257	>	return 1.0f;
258	>	}
259	>
260	>	public JSR166TestCase() { super(); }
261	>	public JSR166TestCase(String name) { super(name); }
262	>
263	>	/**
264	>	* A filter for tests to run, matching strings of the form
265	>	* methodName(className), e.g. "testInvokeAll5(ForkJoinPoolTest)"
266	>	* Usefully combined with jsr166.runsPerTest.
267	>	*/
268	>	private static final Pattern methodFilter = methodFilter();
269	>
270	>	private static Pattern methodFilter() {
271	>	String regex = System.getProperty("jsr166.methodFilter");
272	>	return (regex == null) ? null : Pattern.compile(regex);
273	>	}
274	>
275	>	// Instrumentation to debug very rare, but very annoying hung test runs.
276	>	static volatile TestCase currentTestCase;
277	>	// static volatile int currentRun = 0;
278	>	static {
279	>	Runnable checkForWedgedTest = new Runnable() { public void run() {
280	>	// Avoid spurious reports with enormous runsPerTest.
281	>	// A single test case run should never take more than 1 second.
282	>	// But let's cap it at the high end too ...
283	>	final int timeoutMinutes =
284	>	Math.min(15, Math.max(runsPerTest / 60, 1));
285	>	for (TestCase lastTestCase = currentTestCase;;) {
286	>	try { MINUTES.sleep(timeoutMinutes); }
287	>	catch (InterruptedException unexpected) { break; }
288	>	if (lastTestCase == currentTestCase) {
289	>	System.err.printf(
290	>	"Looks like we're stuck running test: %s%n",
291	>	lastTestCase);
292	>	//                     System.err.printf(
293	>	//                         "Looks like we're stuck running test: %s (%d/%d)%n",
294	>	//                         lastTestCase, currentRun, runsPerTest);
295	>	//                     System.err.println("availableProcessors=" +
296	>	//                         Runtime.getRuntime().availableProcessors());
297	>	//                     System.err.printf("cpu model = %s%n", cpuModel());
298	>	dumpTestThreads();
299	>	// one stack dump is probably enough; more would be spam
300	>	break;
301	>	}
302	>	lastTestCase = currentTestCase;
303	>	}}};
304	>	Thread thread = new Thread(checkForWedgedTest, "checkForWedgedTest");
305	>	thread.setDaemon(true);
306	>	thread.start();
307	>	}
308	>
309	>	//     public static String cpuModel() {
310	>	//         try {
311	>	//             java.util.regex.Matcher matcher
312	>	//               = Pattern.compile("model name\\s*: (.*)")
313	>	//                 .matcher(new String(
314	>	//                     java.nio.file.Files.readAllBytes(
315	>	//                         java.nio.file.Paths.get("/proc/cpuinfo")), "UTF-8"));
316	>	//             matcher.find();
317	>	//             return matcher.group(1);
318	>	//         } catch (Exception ex) { return null; }
319	>	//     }
320	>
321	>	public void runBare() throws Throwable {
322	>	currentTestCase = this;
323	>	if (methodFilter == null
324	>	|| methodFilter.matcher(toString()).find())
325	>	super.runBare();
326	>	}
327	>
328	>	protected void runTest() throws Throwable {
329	>	for (int i = 0; i < runsPerTest; i++) {
330	>	// currentRun = i;
331	>	if (profileTests)
332	>	runTestProfiled();
333	>	else
334	>	super.runTest();
335	>	}
336	>	}
337	>
338	>	protected void runTestProfiled() throws Throwable {
339	>	for (int i = 0; i < 2; i++) {
340	>	long startTime = System.nanoTime();
341	>	super.runTest();
342	>	long elapsedMillis = millisElapsedSince(startTime);
343	>	if (elapsedMillis < profileThreshold)
344	>	break;
345	>	// Never report first run of any test; treat it as a
346	>	// warmup run, notably to trigger all needed classloading,
347	>	if (i > 0)
348	>	System.out.printf("%n%s: %d%n", toString(), elapsedMillis);
349	>	}
350	>	}
351	>
352	>	/**
353	>	* Runs all JSR166 unit tests using junit.textui.TestRunner.
354	>	*/
355	>	public static void main(String[] args) {
356	>	main(suite(), args);
357	>	}
358	>
359	>	static class PithyResultPrinter extends junit.textui.ResultPrinter {
360	>	PithyResultPrinter(java.io.PrintStream writer) { super(writer); }
361	>	long runTime;
362	>	public void startTest(Test test) {}
363	>	protected void printHeader(long runTime) {
364	>	this.runTime = runTime; // defer printing for later
365	>	}
366	>	protected void printFooter(TestResult result) {
367	>	if (result.wasSuccessful()) {
368	>	getWriter().println("OK (" + result.runCount() + " tests)"
369	>	+ "  Time: " + elapsedTimeAsString(runTime));
370	>	} else {
371	>	getWriter().println("Time: " + elapsedTimeAsString(runTime));
372	>	super.printFooter(result);
373	>	}
374	>	}
375	>	}
376	>
377	>	/**
378	>	* Returns a TestRunner that doesn't bother with unnecessary
379	>	* fluff, like printing a "." for each test case.
380	>	*/
381	>	static junit.textui.TestRunner newPithyTestRunner() {
382	>	junit.textui.TestRunner runner = new junit.textui.TestRunner();
383	>	runner.setPrinter(new PithyResultPrinter(System.out));
384	>	return runner;
385	>	}
386	>
387	>	/**
388	>	* Runs all unit tests in the given test suite.
389	>	* Actual behavior influenced by jsr166.* system properties.
390	>	*/
391	>	static void main(Test suite, String[] args) {
392	>	if (useSecurityManager) {
393	>	System.err.println("Setting a permissive security manager");
394	>	Policy.setPolicy(permissivePolicy());
395	>	System.setSecurityManager(new SecurityManager());
396	>	}
397	>	for (int i = 0; i < suiteRuns; i++) {
398	>	TestResult result = newPithyTestRunner().doRun(suite);
399	>	if (!result.wasSuccessful())
400	>	System.exit(1);
401		System.gc();
402		System.runFinalization();
403		}
102	–	System.exit(0);
404		}
405
406	+	public static TestSuite newTestSuite(Object... suiteOrClasses) {
407	+	TestSuite suite = new TestSuite();
408	+	for (Object suiteOrClass : suiteOrClasses) {
409	+	if (suiteOrClass instanceof TestSuite)
410	+	suite.addTest((TestSuite) suiteOrClass);
411	+	else if (suiteOrClass instanceof Class)
412	+	suite.addTest(new TestSuite((Class<?>) suiteOrClass));
413	+	else
414	+	throw new ClassCastException("not a test suite or class");
415	+	}
416	+	return suite;
417	+	}
418	+
419	+	public static void addNamedTestClasses(TestSuite suite,
420	+	String... testClassNames) {
421	+	for (String testClassName : testClassNames) {
422	+	try {
423	+	Class<?> testClass = Class.forName(testClassName);
424	+	Method m = testClass.getDeclaredMethod("suite");
425	+	suite.addTest(newTestSuite((Test)m.invoke(null)));
426	+	} catch (ReflectiveOperationException e) {
427	+	throw new AssertionError("Missing test class", e);
428	+	}
429	+	}
430	+	}
431	+
432	+	public static final double JAVA_CLASS_VERSION;
433	+	public static final String JAVA_SPECIFICATION_VERSION;
434	+	static {
435	+	try {
436	+	JAVA_CLASS_VERSION = java.security.AccessController.doPrivileged(
437	+	new java.security.PrivilegedAction<Double>() {
438	+	public Double run() {
439	+	return Double.valueOf(System.getProperty("java.class.version"));}});
440	+	JAVA_SPECIFICATION_VERSION = java.security.AccessController.doPrivileged(
441	+	new java.security.PrivilegedAction<String>() {
442	+	public String run() {
443	+	return System.getProperty("java.specification.version");}});
444	+	} catch (Throwable t) {
445	+	throw new Error(t);
446	+	}
447	+	}
448	+
449	+	public static boolean atLeastJava6()  { return JAVA_CLASS_VERSION >= 50.0; }
450	+	public static boolean atLeastJava7()  { return JAVA_CLASS_VERSION >= 51.0; }
451	+	public static boolean atLeastJava8()  { return JAVA_CLASS_VERSION >= 52.0; }
452	+	public static boolean atLeastJava9()  { return JAVA_CLASS_VERSION >= 53.0; }
453	+	public static boolean atLeastJava10() { return JAVA_CLASS_VERSION >= 54.0; }
454	+
455		/**
456	<	* Collects all JSR166 unit tests as one suite
457	<	*/
458	<	public static Test suite ( ) {
459	<	TestSuite suite = new TestSuite("JSR166 Unit Tests");
460	<
461	<	suite.addTest(new TestSuite(AbstractExecutorServiceTest.class));
462	<	suite.addTest(new TestSuite(AbstractQueueTest.class));
463	<	suite.addTest(new TestSuite(AbstractQueuedSynchronizerTest.class));
464	<	suite.addTest(new TestSuite(AbstractQueuedLongSynchronizerTest.class));
465	<	suite.addTest(new TestSuite(ArrayBlockingQueueTest.class));
466	<	suite.addTest(new TestSuite(ArrayDequeTest.class));
467	<	suite.addTest(new TestSuite(AtomicBooleanTest.class));
468	<	suite.addTest(new TestSuite(AtomicIntegerArrayTest.class));
469	<	suite.addTest(new TestSuite(AtomicIntegerFieldUpdaterTest.class));
470	<	suite.addTest(new TestSuite(AtomicIntegerTest.class));
471	<	suite.addTest(new TestSuite(AtomicLongArrayTest.class));
472	<	suite.addTest(new TestSuite(AtomicLongFieldUpdaterTest.class));
473	<	suite.addTest(new TestSuite(AtomicLongTest.class));
474	<	suite.addTest(new TestSuite(AtomicMarkableReferenceTest.class));
475	<	suite.addTest(new TestSuite(AtomicReferenceArrayTest.class));
476	<	suite.addTest(new TestSuite(AtomicReferenceFieldUpdaterTest.class));
477	<	suite.addTest(new TestSuite(AtomicReferenceTest.class));
478	<	suite.addTest(new TestSuite(AtomicStampedReferenceTest.class));
479	<	suite.addTest(new TestSuite(ConcurrentHashMapTest.class));
480	<	suite.addTest(new TestSuite(ConcurrentLinkedQueueTest.class));
481	<	suite.addTest(new TestSuite(ConcurrentSkipListMapTest.class));
482	<	suite.addTest(new TestSuite(ConcurrentSkipListSubMapTest.class));
483	<	suite.addTest(new TestSuite(ConcurrentSkipListSetTest.class));
484	<	suite.addTest(new TestSuite(ConcurrentSkipListSubSetTest.class));
485	<	suite.addTest(new TestSuite(CopyOnWriteArrayListTest.class));
486	<	suite.addTest(new TestSuite(CopyOnWriteArraySetTest.class));
487	<	suite.addTest(new TestSuite(CountDownLatchTest.class));
488	<	suite.addTest(new TestSuite(CyclicBarrierTest.class));
489	<	suite.addTest(new TestSuite(DelayQueueTest.class));
490	<	suite.addTest(new TestSuite(ExchangerTest.class));
491	<	suite.addTest(new TestSuite(ExecutorsTest.class));
492	<	suite.addTest(new TestSuite(ExecutorCompletionServiceTest.class));
493	<	suite.addTest(new TestSuite(FutureTaskTest.class));
494	<	suite.addTest(new TestSuite(LinkedBlockingDequeTest.class));
495	<	suite.addTest(new TestSuite(LinkedBlockingQueueTest.class));
496	<	suite.addTest(new TestSuite(LinkedListTest.class));
497	<	suite.addTest(new TestSuite(LockSupportTest.class));
498	<	suite.addTest(new TestSuite(PriorityBlockingQueueTest.class));
499	<	suite.addTest(new TestSuite(PriorityQueueTest.class));
500	<	suite.addTest(new TestSuite(ReentrantLockTest.class));
501	<	suite.addTest(new TestSuite(ReentrantReadWriteLockTest.class));
502	<	suite.addTest(new TestSuite(ScheduledExecutorTest.class));
503	<	suite.addTest(new TestSuite(SemaphoreTest.class));
504	<	suite.addTest(new TestSuite(SynchronousQueueTest.class));
505	<	suite.addTest(new TestSuite(SystemTest.class));
506	<	suite.addTest(new TestSuite(ThreadLocalTest.class));
507	<	suite.addTest(new TestSuite(ThreadPoolExecutorTest.class));
508	<	suite.addTest(new TestSuite(ThreadTest.class));
509	<	suite.addTest(new TestSuite(TimeUnitTest.class));
510	<	suite.addTest(new TestSuite(TreeMapTest.class));
511	<	suite.addTest(new TestSuite(TreeSetTest.class));
512	<	suite.addTest(new TestSuite(TreeSubMapTest.class));
513	<	suite.addTest(new TestSuite(TreeSubSetTest.class));
514	<
456	>	* Collects all JSR166 unit tests as one suite.
457	>	*/
458	>	public static Test suite() {
459	>	// Java7+ test classes
460	>	TestSuite suite = newTestSuite(
461	>	ForkJoinPoolTest.suite(),
462	>	ForkJoinTaskTest.suite(),
463	>	RecursiveActionTest.suite(),
464	>	RecursiveTaskTest.suite(),
465	>	LinkedTransferQueueTest.suite(),
466	>	PhaserTest.suite(),
467	>	ThreadLocalRandomTest.suite(),
468	>	AbstractExecutorServiceTest.suite(),
469	>	AbstractQueueTest.suite(),
470	>	AbstractQueuedSynchronizerTest.suite(),
471	>	AbstractQueuedLongSynchronizerTest.suite(),
472	>	ArrayBlockingQueueTest.suite(),
473	>	ArrayDequeTest.suite(),
474	>	ArrayListTest.suite(),
475	>	AtomicBooleanTest.suite(),
476	>	AtomicIntegerArrayTest.suite(),
477	>	AtomicIntegerFieldUpdaterTest.suite(),
478	>	AtomicIntegerTest.suite(),
479	>	AtomicLongArrayTest.suite(),
480	>	AtomicLongFieldUpdaterTest.suite(),
481	>	AtomicLongTest.suite(),
482	>	AtomicMarkableReferenceTest.suite(),
483	>	AtomicReferenceArrayTest.suite(),
484	>	AtomicReferenceFieldUpdaterTest.suite(),
485	>	AtomicReferenceTest.suite(),
486	>	AtomicStampedReferenceTest.suite(),
487	>	ConcurrentHashMapTest.suite(),
488	>	ConcurrentLinkedDequeTest.suite(),
489	>	ConcurrentLinkedQueueTest.suite(),
490	>	ConcurrentSkipListMapTest.suite(),
491	>	ConcurrentSkipListSubMapTest.suite(),
492	>	ConcurrentSkipListSetTest.suite(),
493	>	ConcurrentSkipListSubSetTest.suite(),
494	>	CopyOnWriteArrayListTest.suite(),
495	>	CopyOnWriteArraySetTest.suite(),
496	>	CountDownLatchTest.suite(),
497	>	CountedCompleterTest.suite(),
498	>	CyclicBarrierTest.suite(),
499	>	DelayQueueTest.suite(),
500	>	EntryTest.suite(),
501	>	ExchangerTest.suite(),
502	>	ExecutorsTest.suite(),
503	>	ExecutorCompletionServiceTest.suite(),
504	>	FutureTaskTest.suite(),
505	>	LinkedBlockingDequeTest.suite(),
506	>	LinkedBlockingQueueTest.suite(),
507	>	LinkedListTest.suite(),
508	>	LockSupportTest.suite(),
509	>	PriorityBlockingQueueTest.suite(),
510	>	PriorityQueueTest.suite(),
511	>	ReentrantLockTest.suite(),
512	>	ReentrantReadWriteLockTest.suite(),
513	>	ScheduledExecutorTest.suite(),
514	>	ScheduledExecutorSubclassTest.suite(),
515	>	SemaphoreTest.suite(),
516	>	SynchronousQueueTest.suite(),
517	>	SystemTest.suite(),
518	>	ThreadLocalTest.suite(),
519	>	ThreadPoolExecutorTest.suite(),
520	>	ThreadPoolExecutorSubclassTest.suite(),
521	>	ThreadTest.suite(),
522	>	TimeUnitTest.suite(),
523	>	TreeMapTest.suite(),
524	>	TreeSetTest.suite(),
525	>	TreeSubMapTest.suite(),
526	>	TreeSubSetTest.suite(),
527	>	VectorTest.suite());
528	>
529	>	// Java8+ test classes
530	>	if (atLeastJava8()) {
531	>	String[] java8TestClassNames = {
532	>	"ArrayDeque8Test",
533	>	"Atomic8Test",
534	>	"CompletableFutureTest",
535	>	"ConcurrentHashMap8Test",
536	>	"CountedCompleter8Test",
537	>	"DoubleAccumulatorTest",
538	>	"DoubleAdderTest",
539	>	"ForkJoinPool8Test",
540	>	"ForkJoinTask8Test",
541	>	"HashMapTest",
542	>	"LinkedBlockingDeque8Test",
543	>	"LinkedBlockingQueue8Test",
544	>	"LongAccumulatorTest",
545	>	"LongAdderTest",
546	>	"SplittableRandomTest",
547	>	"StampedLockTest",
548	>	"SubmissionPublisherTest",
549	>	"ThreadLocalRandom8Test",
550	>	"TimeUnit8Test",
551	>	};
552	>	addNamedTestClasses(suite, java8TestClassNames);
553	>	}
554	>
555	>	// Java9+ test classes
556	>	if (atLeastJava9()) {
557	>	String[] java9TestClassNames = {
558	>	"AtomicBoolean9Test",
559	>	"AtomicInteger9Test",
560	>	"AtomicIntegerArray9Test",
561	>	"AtomicLong9Test",
562	>	"AtomicLongArray9Test",
563	>	"AtomicReference9Test",
564	>	"AtomicReferenceArray9Test",
565	>	"ExecutorCompletionService9Test",
566	>	"ForkJoinPool9Test",
567	>	};
568	>	addNamedTestClasses(suite, java9TestClassNames);
569	>	}
570	>
571		return suite;
572		}
573
574	+	/** Returns list of junit-style test method names in given class. */
575	+	public static ArrayList<String> testMethodNames(Class<?> testClass) {
576	+	Method[] methods = testClass.getDeclaredMethods();
577	+	ArrayList<String> names = new ArrayList<>(methods.length);
578	+	for (Method method : methods) {
579	+	if (method.getName().startsWith("test")
580	+	&& Modifier.isPublic(method.getModifiers())
581	+	// method.getParameterCount() requires jdk8+
582	+	&& method.getParameterTypes().length == 0) {
583	+	names.add(method.getName());
584	+	}
585	+	}
586	+	return names;
587	+	}
588	+
589	+	/**
590	+	* Returns junit-style testSuite for the given test class, but
591	+	* parameterized by passing extra data to each test.
592	+	*/
593	+	public static <ExtraData> Test parameterizedTestSuite
594	+	(Class<? extends JSR166TestCase> testClass,
595	+	Class<ExtraData> dataClass,
596	+	ExtraData data) {
597	+	try {
598	+	TestSuite suite = new TestSuite();
599	+	Constructor c =
600	+	testClass.getDeclaredConstructor(dataClass, String.class);
601	+	for (String methodName : testMethodNames(testClass))
602	+	suite.addTest((Test) c.newInstance(data, methodName));
603	+	return suite;
604	+	} catch (ReflectiveOperationException e) {
605	+	throw new AssertionError(e);
606	+	}
607	+	}
608	+
609	+	/**
610	+	* Returns junit-style testSuite for the jdk8 extension of the
611	+	* given test class, but parameterized by passing extra data to
612	+	* each test.  Uses reflection to allow compilation in jdk7.
613	+	*/
614	+	public static <ExtraData> Test jdk8ParameterizedTestSuite
615	+	(Class<? extends JSR166TestCase> testClass,
616	+	Class<ExtraData> dataClass,
617	+	ExtraData data) {
618	+	if (atLeastJava8()) {
619	+	String name = testClass.getName();
620	+	String name8 = name.replaceAll("Test$", "8Test");
621	+	if (name.equals(name8)) throw new AssertionError(name);
622	+	try {
623	+	return (Test)
624	+	Class.forName(name8)
625	+	.getMethod("testSuite", dataClass)
626	+	.invoke(null, data);
627	+	} catch (ReflectiveOperationException e) {
628	+	throw new AssertionError(e);
629	+	}
630	+	} else {
631	+	return new TestSuite();
632	+	}
633	+	}
634	+
635	+	// Delays for timing-dependent tests, in milliseconds.
636
637		public static long SHORT_DELAY_MS;
638		public static long SMALL_DELAY_MS;
639		public static long MEDIUM_DELAY_MS;
640		public static long LONG_DELAY_MS;
641
642	+	private static final long RANDOM_TIMEOUT;
643	+	private static final long RANDOM_EXPIRED_TIMEOUT;
644	+	private static final TimeUnit RANDOM_TIMEUNIT;
645	+	static {
646	+	ThreadLocalRandom rnd = ThreadLocalRandom.current();
647	+	long[] timeouts = { Long.MIN_VALUE, -1, 0, 1, Long.MAX_VALUE };
648	+	RANDOM_TIMEOUT = timeouts[rnd.nextInt(timeouts.length)];
649	+	RANDOM_EXPIRED_TIMEOUT = timeouts[rnd.nextInt(3)];
650	+	TimeUnit[] timeUnits = TimeUnit.values();
651	+	RANDOM_TIMEUNIT = timeUnits[rnd.nextInt(timeUnits.length)];
652	+	}
653
654		/**
655	<	* Return the shortest timed delay. This could
656	<	* be reimplemented to use for example a Property.
657	<	*/
655	>	* Returns a timeout for use when any value at all will do.
656	>	*/
657	>	static long randomTimeout() { return RANDOM_TIMEOUT; }
658	>
659	>	/**
660	>	* Returns a timeout that means "no waiting", i.e. not positive.
661	>	*/
662	>	static long randomExpiredTimeout() { return RANDOM_EXPIRED_TIMEOUT; }
663	>
664	>	/**
665	>	* Returns a random non-null TimeUnit.
666	>	*/
667	>	static TimeUnit randomTimeUnit() { return RANDOM_TIMEUNIT; }
668	>
669	>	/**
670	>	* Returns the shortest timed delay. This can be scaled up for
671	>	* slow machines using the jsr166.delay.factor system property,
672	>	* or via jtreg's -timeoutFactor: flag.
673	>	* http://openjdk.java.net/jtreg/command-help.html
674	>	*/
675		protected long getShortDelay() {
676	<	return 50;
676	>	return (long) (50 * delayFactor);
677		}
678
183	–
679		/**
680	<	* Set delays as multiples of SHORT_DELAY.
680	>	* Sets delays as multiples of SHORT_DELAY.
681		*/
682	<	protected  void setDelays() {
682	>	protected void setDelays() {
683		SHORT_DELAY_MS = getShortDelay();
684	<	SMALL_DELAY_MS = SHORT_DELAY_MS * 5;
684	>	SMALL_DELAY_MS  = SHORT_DELAY_MS * 5;
685		MEDIUM_DELAY_MS = SHORT_DELAY_MS * 10;
686	<	LONG_DELAY_MS = SHORT_DELAY_MS * 50;
686	>	LONG_DELAY_MS   = SHORT_DELAY_MS * 200;
687		}
688
689	+	private static final long TIMEOUT_DELAY_MS
690	+	= (long) (12.0 * Math.cbrt(delayFactor));
691	+
692		/**
693	<	* Flag set true if any threadAssert methods fail
693	>	* Returns a timeout in milliseconds to be used in tests that verify
694	>	* that operations block or time out.  We want this to be longer
695	>	* than the OS scheduling quantum, but not too long, so don't scale
696	>	* linearly with delayFactor; we use "crazy" cube root instead.
697		*/
698	<	volatile boolean threadFailed;
698	>	static long timeoutMillis() {
699	>	return TIMEOUT_DELAY_MS;
700	>	}
701	>
702	>	/**
703	>	* Returns a new Date instance representing a time at least
704	>	* delayMillis milliseconds in the future.
705	>	*/
706	>	Date delayedDate(long delayMillis) {
707	>	// Add 1 because currentTimeMillis is known to round into the past.
708	>	return new Date(System.currentTimeMillis() + delayMillis + 1);
709	>	}
710
711		/**
712	<	* Initialize test to indicate that no thread assertions have failed
712	>	* The first exception encountered if any threadAssertXXX method fails.
713		*/
714	<	public void setUp() {
714	>	private final AtomicReference<Throwable> threadFailure
715	>	= new AtomicReference<>(null);
716	>
717	>	/**
718	>	* Records an exception so that it can be rethrown later in the test
719	>	* harness thread, triggering a test case failure.  Only the first
720	>	* failure is recorded; subsequent calls to this method from within
721	>	* the same test have no effect.
722	>	*/
723	>	public void threadRecordFailure(Throwable t) {
724	>	System.err.println(t);
725	>	dumpTestThreads();
726	>	threadFailure.compareAndSet(null, t);
727	>	}
728	>
729	>	public void setUp() {
730		setDelays();
731	<	threadFailed = false;
731	>	}
732	>
733	>	void tearDownFail(String format, Object... args) {
734	>	String msg = toString() + ": " + String.format(format, args);
735	>	System.err.println(msg);
736	>	dumpTestThreads();
737	>	throw new AssertionError(msg);
738	>	}
739	>
740	>	/**
741	>	* Extra checks that get done for all test cases.
742	>	*
743	>	* Triggers test case failure if any thread assertions have failed,
744	>	* by rethrowing, in the test harness thread, any exception recorded
745	>	* earlier by threadRecordFailure.
746	>	*
747	>	* Triggers test case failure if interrupt status is set in the main thread.
748	>	*/
749	>	public void tearDown() throws Exception {
750	>	Throwable t = threadFailure.getAndSet(null);
751	>	if (t != null) {
752	>	if (t instanceof Error)
753	>	throw (Error) t;
754	>	else if (t instanceof RuntimeException)
755	>	throw (RuntimeException) t;
756	>	else if (t instanceof Exception)
757	>	throw (Exception) t;
758	>	else
759	>	throw new AssertionError(t.toString(), t);
760	>	}
761	>
762	>	if (Thread.interrupted())
763	>	tearDownFail("interrupt status set in main thread");
764	>
765	>	checkForkJoinPoolThreadLeaks();
766		}
767
768		/**
769	<	* Trigger test case failure if any thread assertions have failed
769	>	* Finds missing PoolCleaners
770		*/
771	<	public void tearDown() {
772	<	assertFalse(threadFailed);
771	>	void checkForkJoinPoolThreadLeaks() throws InterruptedException {
772	>	Thread[] survivors = new Thread[7];
773	>	int count = Thread.enumerate(survivors);
774	>	for (int i = 0; i < count; i++) {
775	>	Thread thread = survivors[i];
776	>	String name = thread.getName();
777	>	if (name.startsWith("ForkJoinPool-")) {
778	>	// give thread some time to terminate
779	>	thread.join(LONG_DELAY_MS);
780	>	if (thread.isAlive())
781	>	tearDownFail("Found leaked ForkJoinPool thread thread=%s",
782	>	thread);
783	>	}
784	>	}
785	>
786	>	if (!ForkJoinPool.commonPool()
787	>	.awaitQuiescence(LONG_DELAY_MS, MILLISECONDS))
788	>	tearDownFail("ForkJoin common pool thread stuck");
789		}
790
791		/**
792	<	* Fail, also setting status to indicate current testcase should fail
793	<	*/
792	>	* Just like fail(reason), but additionally recording (using
793	>	* threadRecordFailure) any AssertionError thrown, so that the
794	>	* current testcase will fail.
795	>	*/
796		public void threadFail(String reason) {
797	<	threadFailed = true;
798	<	fail(reason);
797	>	try {
798	>	fail(reason);
799	>	} catch (AssertionError fail) {
800	>	threadRecordFailure(fail);
801	>	throw fail;
802	>	}
803		}
804
805		/**
806	<	* If expression not true, set status to indicate current testcase
807	<	* should fail
808	<	*/
806	>	* Just like assertTrue(b), but additionally recording (using
807	>	* threadRecordFailure) any AssertionError thrown, so that the
808	>	* current testcase will fail.
809	>	*/
810		public void threadAssertTrue(boolean b) {
811	<	if (!b) {
228	<	threadFailed = true;
811	>	try {
812		assertTrue(b);
813	+	} catch (AssertionError fail) {
814	+	threadRecordFailure(fail);
815	+	throw fail;
816		}
817		}
818
819		/**
820	<	* If expression not false, set status to indicate current testcase
821	<	* should fail
822	<	*/
820	>	* Just like assertFalse(b), but additionally recording (using
821	>	* threadRecordFailure) any AssertionError thrown, so that the
822	>	* current testcase will fail.
823	>	*/
824		public void threadAssertFalse(boolean b) {
825	<	if (b) {
239	<	threadFailed = true;
825	>	try {
826		assertFalse(b);
827	+	} catch (AssertionError fail) {
828	+	threadRecordFailure(fail);
829	+	throw fail;
830		}
831		}
832
833		/**
834	<	* If argument not null, set status to indicate current testcase
835	<	* should fail
836	<	*/
834	>	* Just like assertNull(x), but additionally recording (using
835	>	* threadRecordFailure) any AssertionError thrown, so that the
836	>	* current testcase will fail.
837	>	*/
838		public void threadAssertNull(Object x) {
839	<	if (x != null) {
250	<	threadFailed = true;
839	>	try {
840		assertNull(x);
841	+	} catch (AssertionError fail) {
842	+	threadRecordFailure(fail);
843	+	throw fail;
844		}
845		}
846
847		/**
848	<	* If arguments not equal, set status to indicate current testcase
849	<	* should fail
850	<	*/
848	>	* Just like assertEquals(x, y), but additionally recording (using
849	>	* threadRecordFailure) any AssertionError thrown, so that the
850	>	* current testcase will fail.
851	>	*/
852		public void threadAssertEquals(long x, long y) {
853	<	if (x != y) {
261	<	threadFailed = true;
853	>	try {
854		assertEquals(x, y);
855	+	} catch (AssertionError fail) {
856	+	threadRecordFailure(fail);
857	+	throw fail;
858		}
859		}
860
861		/**
862	<	* If arguments not equal, set status to indicate current testcase
863	<	* should fail
864	<	*/
862	>	* Just like assertEquals(x, y), but additionally recording (using
863	>	* threadRecordFailure) any AssertionError thrown, so that the
864	>	* current testcase will fail.
865	>	*/
866		public void threadAssertEquals(Object x, Object y) {
867	<	if (x != y && (x == null || !x.equals(y))) {
272	<	threadFailed = true;
867	>	try {
868		assertEquals(x, y);
869	+	} catch (AssertionError fail) {
870	+	threadRecordFailure(fail);
871	+	throw fail;
872	+	} catch (Throwable fail) {
873	+	threadUnexpectedException(fail);
874		}
875		}
876
877		/**
878	<	* threadFail with message "should throw exception"
879	<	*/
878	>	* Just like assertSame(x, y), but additionally recording (using
879	>	* threadRecordFailure) any AssertionError thrown, so that the
880	>	* current testcase will fail.
881	>	*/
882	>	public void threadAssertSame(Object x, Object y) {
883	>	try {
884	>	assertSame(x, y);
885	>	} catch (AssertionError fail) {
886	>	threadRecordFailure(fail);
887	>	throw fail;
888	>	}
889	>	}
890	>
891	>	/**
892	>	* Calls threadFail with message "should throw exception".
893	>	*/
894		public void threadShouldThrow() {
895	<	threadFailed = true;
896	<	fail("should throw exception");
895	>	threadFail("should throw exception");
896	>	}
897	>
898	>	/**
899	>	* Calls threadFail with message "should throw" + exceptionName.
900	>	*/
901	>	public void threadShouldThrow(String exceptionName) {
902	>	threadFail("should throw " + exceptionName);
903	>	}
904	>
905	>	/**
906	>	* Records the given exception using {@link #threadRecordFailure},
907	>	* then rethrows the exception, wrapping it in an AssertionError
908	>	* if necessary.
909	>	*/
910	>	public void threadUnexpectedException(Throwable t) {
911	>	threadRecordFailure(t);
912	>	t.printStackTrace();
913	>	if (t instanceof RuntimeException)
914	>	throw (RuntimeException) t;
915	>	else if (t instanceof Error)
916	>	throw (Error) t;
917	>	else
918	>	throw new AssertionError("unexpected exception: " + t, t);
919	>	}
920	>
921	>	/**
922	>	* Delays, via Thread.sleep, for the given millisecond delay, but
923	>	* if the sleep is shorter than specified, may re-sleep or yield
924	>	* until time elapses.  Ensures that the given time, as measured
925	>	* by System.nanoTime(), has elapsed.
926	>	*/
927	>	static void delay(long millis) throws InterruptedException {
928	>	long nanos = millis * (1000 * 1000);
929	>	final long wakeupTime = System.nanoTime() + nanos;
930	>	do {
931	>	if (millis > 0L)
932	>	Thread.sleep(millis);
933	>	else // too short to sleep
934	>	Thread.yield();
935	>	nanos = wakeupTime - System.nanoTime();
936	>	millis = nanos / (1000 * 1000);
937	>	} while (nanos >= 0L);
938	>	}
939	>
940	>	/**
941	>	* Allows use of try-with-resources with per-test thread pools.
942	>	*/
943	>	class PoolCleaner implements AutoCloseable {
944	>	private final ExecutorService pool;
945	>	public PoolCleaner(ExecutorService pool) { this.pool = pool; }
946	>	public void close() { joinPool(pool); }
947		}
948
949		/**
950	<	* threadFail with message "Unexpected exception"
950	>	* An extension of PoolCleaner that has an action to release the pool.
951		*/
952	<	public void threadUnexpectedException() {
953	<	threadFailed = true;
954	<	fail("Unexpected exception");
952	>	class PoolCleanerWithReleaser extends PoolCleaner {
953	>	private final Runnable releaser;
954	>	public PoolCleanerWithReleaser(ExecutorService pool, Runnable releaser) {
955	>	super(pool);
956	>	this.releaser = releaser;
957	>	}
958	>	public void close() {
959	>	try {
960	>	releaser.run();
961	>	} finally {
962	>	super.close();
963	>	}
964	>	}
965	>	}
966	>
967	>	PoolCleaner cleaner(ExecutorService pool) {
968	>	return new PoolCleaner(pool);
969		}
970
971	+	PoolCleaner cleaner(ExecutorService pool, Runnable releaser) {
972	+	return new PoolCleanerWithReleaser(pool, releaser);
973	+	}
974	+
975	+	PoolCleaner cleaner(ExecutorService pool, CountDownLatch latch) {
976	+	return new PoolCleanerWithReleaser(pool, releaser(latch));
977	+	}
978	+
979	+	Runnable releaser(final CountDownLatch latch) {
980	+	return new Runnable() { public void run() {
981	+	do { latch.countDown(); }
982	+	while (latch.getCount() > 0);
983	+	}};
984	+	}
985	+
986	+	PoolCleaner cleaner(ExecutorService pool, AtomicBoolean flag) {
987	+	return new PoolCleanerWithReleaser(pool, releaser(flag));
988	+	}
989	+
990	+	Runnable releaser(final AtomicBoolean flag) {
991	+	return new Runnable() { public void run() { flag.set(true); }};
992	+	}
993
994		/**
995	<	* Wait out termination of a thread pool or fail doing so
995	>	* Waits out termination of a thread pool or fails doing so.
996		*/
997	<	public void joinPool(ExecutorService exec) {
997	>	void joinPool(ExecutorService pool) {
998		try {
999	<	exec.shutdown();
1000	<	assertTrue(exec.awaitTermination(LONG_DELAY_MS, TimeUnit.MILLISECONDS));
1001	<	} catch(SecurityException ok) {
999	>	pool.shutdown();
1000	>	if (!pool.awaitTermination(2 * LONG_DELAY_MS, MILLISECONDS)) {
1001	>	try {
1002	>	threadFail("ExecutorService " + pool +
1003	>	" did not terminate in a timely manner");
1004	>	} finally {
1005	>	// last resort, for the benefit of subsequent tests
1006	>	pool.shutdownNow();
1007	>	pool.awaitTermination(MEDIUM_DELAY_MS, MILLISECONDS);
1008	>	}
1009	>	}
1010	>	} catch (SecurityException ok) {
1011		// Allowed in case test doesn't have privs
1012	<	} catch(InterruptedException ie) {
1013	<	fail("Unexpected exception");
1012	>	} catch (InterruptedException fail) {
1013	>	threadFail("Unexpected InterruptedException");
1014		}
1015		}
1016
1017	+	/**
1018	+	* Like Runnable, but with the freedom to throw anything.
1019	+	* junit folks had the same idea:
1020	+	* http://junit.org/junit5/docs/snapshot/api/org/junit/gen5/api/Executable.html
1021	+	*/
1022	+	interface Action { public void run() throws Throwable; }
1023	+
1024	+	/**
1025	+	* Runs all the given actions in parallel, failing if any fail.
1026	+	* Useful for running multiple variants of tests that are
1027	+	* necessarily individually slow because they must block.
1028	+	*/
1029	+	void testInParallel(Action ... actions) {
1030	+	ExecutorService pool = Executors.newCachedThreadPool();
1031	+	try (PoolCleaner cleaner = cleaner(pool)) {
1032	+	ArrayList<Future<?>> futures = new ArrayList<>(actions.length);
1033	+	for (final Action action : actions)
1034	+	futures.add(pool.submit(new CheckedRunnable() {
1035	+	public void realRun() throws Throwable { action.run();}}));
1036	+	for (Future<?> future : futures)
1037	+	try {
1038	+	assertNull(future.get(LONG_DELAY_MS, MILLISECONDS));
1039	+	} catch (ExecutionException ex) {
1040	+	threadUnexpectedException(ex.getCause());
1041	+	} catch (Exception ex) {
1042	+	threadUnexpectedException(ex);
1043	+	}
1044	+	}
1045	+	}
1046	+
1047	+	/**
1048	+	* A debugging tool to print stack traces of most threads, as jstack does.
1049	+	* Uninteresting threads are filtered out.
1050	+	*/
1051	+	static void dumpTestThreads() {
1052	+	SecurityManager sm = System.getSecurityManager();
1053	+	if (sm != null) {
1054	+	try {
1055	+	System.setSecurityManager(null);
1056	+	} catch (SecurityException giveUp) {
1057	+	return;
1058	+	}
1059	+	}
1060	+
1061	+	ThreadMXBean threadMXBean = ManagementFactory.getThreadMXBean();
1062	+	System.err.println("------ stacktrace dump start ------");
1063	+	for (ThreadInfo info : threadMXBean.dumpAllThreads(true, true)) {
1064	+	final String name = info.getThreadName();
1065	+	String lockName;
1066	+	if ("Signal Dispatcher".equals(name))
1067	+	continue;
1068	+	if ("Reference Handler".equals(name)
1069	+	&& (lockName = info.getLockName()) != null
1070	+	&& lockName.startsWith("java.lang.ref.Reference$Lock"))
1071	+	continue;
1072	+	if ("Finalizer".equals(name)
1073	+	&& (lockName = info.getLockName()) != null
1074	+	&& lockName.startsWith("java.lang.ref.ReferenceQueue$Lock"))
1075	+	continue;
1076	+	if ("checkForWedgedTest".equals(name))
1077	+	continue;
1078	+	System.err.print(info);
1079	+	}
1080	+	System.err.println("------ stacktrace dump end ------");
1081	+
1082	+	if (sm != null) System.setSecurityManager(sm);
1083	+	}
1084
1085		/**
1086	<	* fail with message "should throw exception"
1087	<	*/
1086	>	* Checks that thread eventually enters the expected blocked thread state.
1087	>	*/
1088	>	void assertThreadBlocks(Thread thread, Thread.State expected) {
1089	>	// always sleep at least 1 ms, with high probability avoiding
1090	>	// transitory states
1091	>	for (long retries = LONG_DELAY_MS * 3 / 4; retries-->0; ) {
1092	>	try { delay(1); }
1093	>	catch (InterruptedException fail) {
1094	>	throw new AssertionError("Unexpected InterruptedException", fail);
1095	>	}
1096	>	Thread.State s = thread.getState();
1097	>	if (s == expected)
1098	>	return;
1099	>	else if (s == Thread.State.TERMINATED)
1100	>	fail("Unexpected thread termination");
1101	>	}
1102	>	fail("timed out waiting for thread to enter thread state " + expected);
1103	>	}
1104	>
1105	>	/**
1106	>	* Checks that future.get times out, with the default timeout of
1107	>	* {@code timeoutMillis()}.
1108	>	*/
1109	>	void assertFutureTimesOut(Future future) {
1110	>	assertFutureTimesOut(future, timeoutMillis());
1111	>	}
1112	>
1113	>	/**
1114	>	* Checks that future.get times out, with the given millisecond timeout.
1115	>	*/
1116	>	void assertFutureTimesOut(Future future, long timeoutMillis) {
1117	>	long startTime = System.nanoTime();
1118	>	try {
1119	>	future.get(timeoutMillis, MILLISECONDS);
1120	>	shouldThrow();
1121	>	} catch (TimeoutException success) {
1122	>	} catch (Exception fail) {
1123	>	threadUnexpectedException(fail);
1124	>	} finally { future.cancel(true); }
1125	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
1126	>	}
1127	>
1128	>	/**
1129	>	* Fails with message "should throw exception".
1130	>	*/
1131		public void shouldThrow() {
1132		fail("Should throw exception");
1133		}
1134
1135		/**
1136	<	* fail with message "Unexpected exception"
1136	>	* Fails with message "should throw " + exceptionName.
1137		*/
1138	<	public void unexpectedException() {
1139	<	fail("Unexpected exception");
1138	>	public void shouldThrow(String exceptionName) {
1139	>	fail("Should throw " + exceptionName);
1140		}
1141
1142	+	/**
1143	+	* The maximum number of consecutive spurious wakeups we should
1144	+	* tolerate (from APIs like LockSupport.park) before failing a test.
1145	+	*/
1146	+	static final int MAX_SPURIOUS_WAKEUPS = 10;
1147
1148		/**
1149		* The number of elements to place in collections, arrays, etc.
1150		*/
1151	<	static final int SIZE = 20;
1151	>	public static final int SIZE = 20;
1152
1153		// Some convenient Integer constants
1154
1155	<	static final Integer zero = new Integer(0);
1156	<	static final Integer one = new Integer(1);
1157	<	static final Integer two = new Integer(2);
1158	<	static final Integer three  = new Integer(3);
1159	<	static final Integer four  = new Integer(4);
1160	<	static final Integer five  = new Integer(5);
1161	<	static final Integer six = new Integer(6);
1162	<	static final Integer seven = new Integer(7);
1163	<	static final Integer eight = new Integer(8);
1164	<	static final Integer nine = new Integer(9);
1165	<	static final Integer m1  = new Integer(-1);
1166	<	static final Integer m2  = new Integer(-2);
1167	<	static final Integer m3  = new Integer(-3);
1168	<	static final Integer m4 = new Integer(-4);
1169	<	static final Integer m5 = new Integer(-5);
1170	<	static final Integer m10 = new Integer(-10);
1155	>	public static final Integer zero  = new Integer(0);
1156	>	public static final Integer one   = new Integer(1);
1157	>	public static final Integer two   = new Integer(2);
1158	>	public static final Integer three = new Integer(3);
1159	>	public static final Integer four  = new Integer(4);
1160	>	public static final Integer five  = new Integer(5);
1161	>	public static final Integer six   = new Integer(6);
1162	>	public static final Integer seven = new Integer(7);
1163	>	public static final Integer eight = new Integer(8);
1164	>	public static final Integer nine  = new Integer(9);
1165	>	public static final Integer m1  = new Integer(-1);
1166	>	public static final Integer m2  = new Integer(-2);
1167	>	public static final Integer m3  = new Integer(-3);
1168	>	public static final Integer m4  = new Integer(-4);
1169	>	public static final Integer m5  = new Integer(-5);
1170	>	public static final Integer m6  = new Integer(-6);
1171	>	public static final Integer m10 = new Integer(-10);
1172	>
1173	>	/**
1174	>	* Runs Runnable r with a security policy that permits precisely
1175	>	* the specified permissions.  If there is no current security
1176	>	* manager, the runnable is run twice, both with and without a
1177	>	* security manager.  We require that any security manager permit
1178	>	* getPolicy/setPolicy.
1179	>	*/
1180	>	public void runWithPermissions(Runnable r, Permission... permissions) {
1181	>	SecurityManager sm = System.getSecurityManager();
1182	>	if (sm == null) {
1183	>	r.run();
1184	>	}
1185	>	runWithSecurityManagerWithPermissions(r, permissions);
1186	>	}
1187	>
1188	>	/**
1189	>	* Runs Runnable r with a security policy that permits precisely
1190	>	* the specified permissions.  If there is no current security
1191	>	* manager, a temporary one is set for the duration of the
1192	>	* Runnable.  We require that any security manager permit
1193	>	* getPolicy/setPolicy.
1194	>	*/
1195	>	public void runWithSecurityManagerWithPermissions(Runnable r,
1196	>	Permission... permissions) {
1197	>	SecurityManager sm = System.getSecurityManager();
1198	>	if (sm == null) {
1199	>	Policy savedPolicy = Policy.getPolicy();
1200	>	try {
1201	>	Policy.setPolicy(permissivePolicy());
1202	>	System.setSecurityManager(new SecurityManager());
1203	>	runWithSecurityManagerWithPermissions(r, permissions);
1204	>	} finally {
1205	>	System.setSecurityManager(null);
1206	>	Policy.setPolicy(savedPolicy);
1207	>	}
1208	>	} else {
1209	>	Policy savedPolicy = Policy.getPolicy();
1210	>	AdjustablePolicy policy = new AdjustablePolicy(permissions);
1211	>	Policy.setPolicy(policy);
1212	>
1213	>	try {
1214	>	r.run();
1215	>	} finally {
1216	>	policy.addPermission(new SecurityPermission("setPolicy"));
1217	>	Policy.setPolicy(savedPolicy);
1218	>	}
1219	>	}
1220	>	}
1221
1222	+	/**
1223	+	* Runs a runnable without any permissions.
1224	+	*/
1225	+	public void runWithoutPermissions(Runnable r) {
1226	+	runWithPermissions(r);
1227	+	}
1228
1229		/**
1230		* A security policy where new permissions can be dynamically added
1231		* or all cleared.
1232		*/
1233	<	static class AdjustablePolicy extends java.security.Policy {
1233	>	public static class AdjustablePolicy extends java.security.Policy {
1234		Permissions perms = new Permissions();
1235	<	AdjustablePolicy() { }
1235	>	AdjustablePolicy(Permission... permissions) {
1236	>	for (Permission permission : permissions)
1237	>	perms.add(permission);
1238	>	}
1239		void addPermission(Permission perm) { perms.add(perm); }
1240		void clearPermissions() { perms = new Permissions(); }
1241	<	public PermissionCollection getPermissions(CodeSource cs) {
1242	<	return perms;
1243	<	}
1244	<	public PermissionCollection getPermissions(ProtectionDomain pd) {
1245	<	return perms;
1246	<	}
1247	<	public boolean implies(ProtectionDomain pd, Permission p) {
1248	<	return perms.implies(p);
1249	<	}
1250	<	public void refresh() {}
1241	>	public PermissionCollection getPermissions(CodeSource cs) {
1242	>	return perms;
1243	>	}
1244	>	public PermissionCollection getPermissions(ProtectionDomain pd) {
1245	>	return perms;
1246	>	}
1247	>	public boolean implies(ProtectionDomain pd, Permission p) {
1248	>	return perms.implies(p);
1249	>	}
1250	>	public void refresh() {}
1251	>	public String toString() {
1252	>	List<Permission> ps = new ArrayList<>();
1253	>	for (Enumeration<Permission> e = perms.elements(); e.hasMoreElements();)
1254	>	ps.add(e.nextElement());
1255	>	return "AdjustablePolicy with permissions " + ps;
1256	>	}
1257		}
1258
1259	+	/**
1260	+	* Returns a policy containing all the permissions we ever need.
1261	+	*/
1262	+	public static Policy permissivePolicy() {
1263	+	return new AdjustablePolicy
1264	+	// Permissions j.u.c. needs directly
1265	+	(new RuntimePermission("modifyThread"),
1266	+	new RuntimePermission("getClassLoader"),
1267	+	new RuntimePermission("setContextClassLoader"),
1268	+	// Permissions needed to change permissions!
1269	+	new SecurityPermission("getPolicy"),
1270	+	new SecurityPermission("setPolicy"),
1271	+	new RuntimePermission("setSecurityManager"),
1272	+	// Permissions needed by the junit test harness
1273	+	new RuntimePermission("accessDeclaredMembers"),
1274	+	new PropertyPermission("*", "read"),
1275	+	new java.io.FilePermission("<<ALL FILES>>", "read"));
1276	+	}
1277
1278	<	// Some convenient Runnable classes
1278	>	/**
1279	>	* Sleeps until the given time has elapsed.
1280	>	* Throws AssertionError if interrupted.
1281	>	*/
1282	>	static void sleep(long millis) {
1283	>	try {
1284	>	delay(millis);
1285	>	} catch (InterruptedException fail) {
1286	>	throw new AssertionError("Unexpected InterruptedException", fail);
1287	>	}
1288	>	}
1289
1290	<	static class NoOpRunnable implements Runnable {
1291	<	public void run() {}
1290	>	/**
1291	>	* Spin-waits up to the specified number of milliseconds for the given
1292	>	* thread to enter a wait state: BLOCKED, WAITING, or TIMED_WAITING.
1293	>	*/
1294	>	void waitForThreadToEnterWaitState(Thread thread, long timeoutMillis) {
1295	>	long startTime = 0L;
1296	>	for (;;) {
1297	>	Thread.State s = thread.getState();
1298	>	if (s == Thread.State.BLOCKED ||
1299	>	s == Thread.State.WAITING ||
1300	>	s == Thread.State.TIMED_WAITING)
1301	>	return;
1302	>	else if (s == Thread.State.TERMINATED)
1303	>	fail("Unexpected thread termination");
1304	>	else if (startTime == 0L)
1305	>	startTime = System.nanoTime();
1306	>	else if (millisElapsedSince(startTime) > timeoutMillis) {
1307	>	threadAssertTrue(thread.isAlive());
1308	>	fail("timed out waiting for thread to enter wait state");
1309	>	}
1310	>	Thread.yield();
1311	>	}
1312		}
1313
1314	<	static class NoOpCallable implements Callable {
1315	<	public Object call() { return Boolean.TRUE; }
1314	>	/**
1315	>	* Spin-waits up to the specified number of milliseconds for the given
1316	>	* thread to enter a wait state: BLOCKED, WAITING, or TIMED_WAITING,
1317	>	* and additionally satisfy the given condition.
1318	>	*/
1319	>	void waitForThreadToEnterWaitState(
1320	>	Thread thread, long timeoutMillis, Callable<Boolean> waitingForGodot) {
1321	>	long startTime = 0L;
1322	>	for (;;) {
1323	>	Thread.State s = thread.getState();
1324	>	if (s == Thread.State.BLOCKED ||
1325	>	s == Thread.State.WAITING ||
1326	>	s == Thread.State.TIMED_WAITING) {
1327	>	try {
1328	>	if (waitingForGodot.call())
1329	>	return;
1330	>	} catch (Throwable fail) { threadUnexpectedException(fail); }
1331	>	}
1332	>	else if (s == Thread.State.TERMINATED)
1333	>	fail("Unexpected thread termination");
1334	>	else if (startTime == 0L)
1335	>	startTime = System.nanoTime();
1336	>	else if (millisElapsedSince(startTime) > timeoutMillis) {
1337	>	threadAssertTrue(thread.isAlive());
1338	>	fail("timed out waiting for thread to enter wait state");
1339	>	}
1340	>	Thread.yield();
1341	>	}
1342		}
1343
1344	<	static final String TEST_STRING = "a test string";
1344	>	/**
1345	>	* Spin-waits up to LONG_DELAY_MS milliseconds for the given thread to
1346	>	* enter a wait state: BLOCKED, WAITING, or TIMED_WAITING.
1347	>	*/
1348	>	void waitForThreadToEnterWaitState(Thread thread) {
1349	>	waitForThreadToEnterWaitState(thread, LONG_DELAY_MS);
1350	>	}
1351
1352	<	static class StringTask implements Callable<String> {
1353	<	public String call() { return TEST_STRING; }
1352	>	/**
1353	>	* Spin-waits up to LONG_DELAY_MS milliseconds for the given thread to
1354	>	* enter a wait state: BLOCKED, WAITING, or TIMED_WAITING,
1355	>	* and additionally satisfy the given condition.
1356	>	*/
1357	>	void waitForThreadToEnterWaitState(
1358	>	Thread thread, Callable<Boolean> waitingForGodot) {
1359	>	waitForThreadToEnterWaitState(thread, LONG_DELAY_MS, waitingForGodot);
1360		}
1361
1362	<	static class NPETask implements Callable<String> {
1363	<	public String call() { throw new NullPointerException(); }
1362	>	/**
1363	>	* Returns the number of milliseconds since time given by
1364	>	* startNanoTime, which must have been previously returned from a
1365	>	* call to {@link System#nanoTime()}.
1366	>	*/
1367	>	static long millisElapsedSince(long startNanoTime) {
1368	>	return NANOSECONDS.toMillis(System.nanoTime() - startNanoTime);
1369		}
1370
1371	<	static class CallableOne implements Callable<Integer> {
1372	<	public Integer call() { return one; }
1371	>	//     void assertTerminatesPromptly(long timeoutMillis, Runnable r) {
1372	>	//         long startTime = System.nanoTime();
1373	>	//         try {
1374	>	//             r.run();
1375	>	//         } catch (Throwable fail) { threadUnexpectedException(fail); }
1376	>	//         if (millisElapsedSince(startTime) > timeoutMillis/2)
1377	>	//             throw new AssertionError("did not return promptly");
1378	>	//     }
1379	>
1380	>	//     void assertTerminatesPromptly(Runnable r) {
1381	>	//         assertTerminatesPromptly(LONG_DELAY_MS/2, r);
1382	>	//     }
1383	>
1384	>	/**
1385	>	* Checks that timed f.get() returns the expected value, and does not
1386	>	* wait for the timeout to elapse before returning.
1387	>	*/
1388	>	<T> void checkTimedGet(Future<T> f, T expectedValue, long timeoutMillis) {
1389	>	long startTime = System.nanoTime();
1390	>	try {
1391	>	assertEquals(expectedValue, f.get(timeoutMillis, MILLISECONDS));
1392	>	} catch (Throwable fail) { threadUnexpectedException(fail); }
1393	>	if (millisElapsedSince(startTime) > timeoutMillis/2)
1394	>	throw new AssertionError("timed get did not return promptly");
1395		}
1396
1397	<	class ShortRunnable implements Runnable {
1398	<	public void run() {
1399	<	try {
1400	<	Thread.sleep(SHORT_DELAY_MS);
1401	<	}
1402	<	catch(Exception e) {
1403	<	threadUnexpectedException();
1397	>	<T> void checkTimedGet(Future<T> f, T expectedValue) {
1398	>	checkTimedGet(f, expectedValue, LONG_DELAY_MS);
1399	>	}
1400	>
1401	>	/**
1402	>	* Returns a new started daemon Thread running the given runnable.
1403	>	*/
1404	>	Thread newStartedThread(Runnable runnable) {
1405	>	Thread t = new Thread(runnable);
1406	>	t.setDaemon(true);
1407	>	t.start();
1408	>	return t;
1409	>	}
1410	>
1411	>	/**
1412	>	* Waits for the specified time (in milliseconds) for the thread
1413	>	* to terminate (using {@link Thread#join(long)}), else interrupts
1414	>	* the thread (in the hope that it may terminate later) and fails.
1415	>	*/
1416	>	void awaitTermination(Thread t, long timeoutMillis) {
1417	>	try {
1418	>	t.join(timeoutMillis);
1419	>	} catch (InterruptedException fail) {
1420	>	threadUnexpectedException(fail);
1421	>	} finally {
1422	>	if (t.getState() != Thread.State.TERMINATED) {
1423	>	t.interrupt();
1424	>	threadFail("timed out waiting for thread to terminate");
1425		}
1426		}
1427		}
1428
1429	<	class ShortInterruptedRunnable implements Runnable {
1430	<	public void run() {
1429	>	/**
1430	>	* Waits for LONG_DELAY_MS milliseconds for the thread to
1431	>	* terminate (using {@link Thread#join(long)}), else interrupts
1432	>	* the thread (in the hope that it may terminate later) and fails.
1433	>	*/
1434	>	void awaitTermination(Thread t) {
1435	>	awaitTermination(t, LONG_DELAY_MS);
1436	>	}
1437	>
1438	>	// Some convenient Runnable classes
1439	>
1440	>	public abstract class CheckedRunnable implements Runnable {
1441	>	protected abstract void realRun() throws Throwable;
1442	>
1443	>	public final void run() {
1444		try {
1445	<	Thread.sleep(SHORT_DELAY_MS);
1446	<	threadShouldThrow();
1447	<	}
412	<	catch(InterruptedException success) {
1445	>	realRun();
1446	>	} catch (Throwable fail) {
1447	>	threadUnexpectedException(fail);
1448		}
1449		}
1450		}
1451
1452	<	class SmallRunnable implements Runnable {
1453	<	public void run() {
1452	>	public abstract class ThreadShouldThrow extends Thread {
1453	>	protected abstract void realRun() throws Throwable;
1454	>
1455	>	final Class<?> exceptionClass;
1456	>
1457	>	<T extends Throwable> ThreadShouldThrow(Class<T> exceptionClass) {
1458	>	this.exceptionClass = exceptionClass;
1459	>	}
1460	>
1461	>	public final void run() {
1462		try {
1463	<	Thread.sleep(SMALL_DELAY_MS);
1464	<	}
1465	<	catch(Exception e) {
1466	<	threadUnexpectedException();
1463	>	realRun();
1464	>	threadShouldThrow(exceptionClass.getSimpleName());
1465	>	} catch (Throwable t) {
1466	>	if (! exceptionClass.isInstance(t))
1467	>	threadUnexpectedException(t);
1468		}
1469		}
1470		}
1471
1472	<	class SmallPossiblyInterruptedRunnable implements Runnable {
1473	<	public void run() {
1472	>	public abstract class CheckedInterruptedRunnable implements Runnable {
1473	>	protected abstract void realRun() throws Throwable;
1474	>
1475	>	public final void run() {
1476		try {
1477	<	Thread.sleep(SMALL_DELAY_MS);
1478	<	}
1479	<	catch(Exception e) {
1477	>	realRun();
1478	>	threadShouldThrow("InterruptedException");
1479	>	} catch (InterruptedException success) {
1480	>	threadAssertFalse(Thread.interrupted());
1481	>	} catch (Throwable fail) {
1482	>	threadUnexpectedException(fail);
1483		}
1484		}
1485		}
1486
1487	<	class SmallCallable implements Callable {
1488	<	public Object call() {
1487	>	public abstract class CheckedCallable<T> implements Callable<T> {
1488	>	protected abstract T realCall() throws Throwable;
1489	>
1490	>	public final T call() {
1491		try {
1492	<	Thread.sleep(SMALL_DELAY_MS);
1492	>	return realCall();
1493	>	} catch (Throwable fail) {
1494	>	threadUnexpectedException(fail);
1495	>	return null;
1496		}
443	–	catch(Exception e) {
444	–	threadUnexpectedException();
445	–	}
446	–	return Boolean.TRUE;
1497		}
1498		}
1499
1500	<	class SmallInterruptedRunnable implements Runnable {
1501	<	public void run() {
1500	>	public abstract class CheckedInterruptedCallable<T>
1501	>	implements Callable<T> {
1502	>	protected abstract T realCall() throws Throwable;
1503	>
1504	>	public final T call() {
1505		try {
1506	<	Thread.sleep(SMALL_DELAY_MS);
1507	<	threadShouldThrow();
1508	<	}
1509	<	catch(InterruptedException success) {
1506	>	T result = realCall();
1507	>	threadShouldThrow("InterruptedException");
1508	>	return result;
1509	>	} catch (InterruptedException success) {
1510	>	threadAssertFalse(Thread.interrupted());
1511	>	} catch (Throwable fail) {
1512	>	threadUnexpectedException(fail);
1513		}
1514	+	return null;
1515		}
1516		}
1517
1518	+	public static class NoOpRunnable implements Runnable {
1519	+	public void run() {}
1520	+	}
1521
1522	<	class MediumRunnable implements Runnable {
1523	<	public void run() {
1524	<	try {
1525	<	Thread.sleep(MEDIUM_DELAY_MS);
1526	<	}
1527	<	catch(Exception e) {
1528	<	threadUnexpectedException();
1529	<	}
1522	>	public static class NoOpCallable implements Callable {
1523	>	public Object call() { return Boolean.TRUE; }
1524	>	}
1525	>
1526	>	public static final String TEST_STRING = "a test string";
1527	>
1528	>	public static class StringTask implements Callable<String> {
1529	>	final String value;
1530	>	public StringTask() { this(TEST_STRING); }
1531	>	public StringTask(String value) { this.value = value; }
1532	>	public String call() { return value; }
1533	>	}
1534	>
1535	>	public Callable<String> latchAwaitingStringTask(final CountDownLatch latch) {
1536	>	return new CheckedCallable<String>() {
1537	>	protected String realCall() {
1538	>	try {
1539	>	latch.await();
1540	>	} catch (InterruptedException quittingTime) {}
1541	>	return TEST_STRING;
1542	>	}};
1543	>	}
1544	>
1545	>	public Runnable countDowner(final CountDownLatch latch) {
1546	>	return new CheckedRunnable() {
1547	>	public void realRun() throws InterruptedException {
1548	>	latch.countDown();
1549	>	}};
1550	>	}
1551	>
1552	>	class LatchAwaiter extends CheckedRunnable {
1553	>	static final int NEW = 0;
1554	>	static final int RUNNING = 1;
1555	>	static final int DONE = 2;
1556	>	final CountDownLatch latch;
1557	>	int state = NEW;
1558	>	LatchAwaiter(CountDownLatch latch) { this.latch = latch; }
1559	>	public void realRun() throws InterruptedException {
1560	>	state = 1;
1561	>	await(latch);
1562	>	state = 2;
1563		}
1564		}
1565
1566	<	class MediumInterruptedRunnable implements Runnable {
1567	<	public void run() {
1568	<	try {
1569	<	Thread.sleep(MEDIUM_DELAY_MS);
1570	<	threadShouldThrow();
1571	<	}
1572	<	catch(InterruptedException success) {
1573	<	}
1566	>	public LatchAwaiter awaiter(CountDownLatch latch) {
1567	>	return new LatchAwaiter(latch);
1568	>	}
1569	>
1570	>	public void await(CountDownLatch latch, long timeoutMillis) {
1571	>	try {
1572	>	if (!latch.await(timeoutMillis, MILLISECONDS))
1573	>	fail("timed out waiting for CountDownLatch for "
1574	>	+ (timeoutMillis/1000) + " sec");
1575	>	} catch (Throwable fail) {
1576	>	threadUnexpectedException(fail);
1577		}
1578		}
1579
1580	<	class MediumPossiblyInterruptedRunnable implements Runnable {
1581	<	public void run() {
1582	<	try {
1583	<	Thread.sleep(MEDIUM_DELAY_MS);
1584	<	}
1585	<	catch(InterruptedException success) {
1586	<	}
1580	>	public void await(CountDownLatch latch) {
1581	>	await(latch, LONG_DELAY_MS);
1582	>	}
1583	>
1584	>	public void await(Semaphore semaphore) {
1585	>	try {
1586	>	if (!semaphore.tryAcquire(LONG_DELAY_MS, MILLISECONDS))
1587	>	fail("timed out waiting for Semaphore for "
1588	>	+ (LONG_DELAY_MS/1000) + " sec");
1589	>	} catch (Throwable fail) {
1590	>	threadUnexpectedException(fail);
1591		}
1592		}
1593
1594	<	class LongPossiblyInterruptedRunnable implements Runnable {
1595	<	public void run() {
1594	>	public void await(CyclicBarrier barrier) {
1595	>	try {
1596	>	barrier.await(LONG_DELAY_MS, MILLISECONDS);
1597	>	} catch (Throwable fail) {
1598	>	threadUnexpectedException(fail);
1599	>	}
1600	>	}
1601	>
1602	>	//     /**
1603	>	//      * Spin-waits up to LONG_DELAY_MS until flag becomes true.
1604	>	//      */
1605	>	//     public void await(AtomicBoolean flag) {
1606	>	//         await(flag, LONG_DELAY_MS);
1607	>	//     }
1608	>
1609	>	//     /**
1610	>	//      * Spin-waits up to the specified timeout until flag becomes true.
1611	>	//      */
1612	>	//     public void await(AtomicBoolean flag, long timeoutMillis) {
1613	>	//         long startTime = System.nanoTime();
1614	>	//         while (!flag.get()) {
1615	>	//             if (millisElapsedSince(startTime) > timeoutMillis)
1616	>	//                 throw new AssertionError("timed out");
1617	>	//             Thread.yield();
1618	>	//         }
1619	>	//     }
1620	>
1621	>	public static class NPETask implements Callable<String> {
1622	>	public String call() { throw new NullPointerException(); }
1623	>	}
1624	>
1625	>	public class SmallPossiblyInterruptedRunnable extends CheckedRunnable {
1626	>	protected void realRun() {
1627		try {
1628	<	Thread.sleep(LONG_DELAY_MS);
1629	<	}
499	<	catch(InterruptedException success) {
500	<	}
1628	>	delay(SMALL_DELAY_MS);
1629	>	} catch (InterruptedException ok) {}
1630		}
1631		}
1632
1633	+	public Runnable possiblyInterruptedRunnable(final long timeoutMillis) {
1634	+	return new CheckedRunnable() {
1635	+	protected void realRun() {
1636	+	try {
1637	+	delay(timeoutMillis);
1638	+	} catch (InterruptedException ok) {}
1639	+	}};
1640	+	}
1641	+
1642		/**
1643		* For use as ThreadFactory in constructors
1644		*/
1645	<	static class SimpleThreadFactory implements ThreadFactory{
1646	<	public Thread newThread(Runnable r){
1645	>	public static class SimpleThreadFactory implements ThreadFactory {
1646	>	public Thread newThread(Runnable r) {
1647		return new Thread(r);
1648	<	}
1648	>	}
1649		}
1650
1651	<	static class TrackedShortRunnable implements Runnable {
1652	<	volatile boolean done = false;
1651	>	public interface TrackedRunnable extends Runnable {
1652	>	boolean isDone();
1653	>	}
1654	>
1655	>	public static class TrackedNoOpRunnable implements Runnable {
1656	>	public volatile boolean done = false;
1657		public void run() {
1658	+	done = true;
1659	+	}
1660	+	}
1661	+
1662	+	/**
1663	+	* Analog of CheckedRunnable for RecursiveAction
1664	+	*/
1665	+	public abstract class CheckedRecursiveAction extends RecursiveAction {
1666	+	protected abstract void realCompute() throws Throwable;
1667	+
1668	+	@Override protected final void compute() {
1669		try {
1670	<	Thread.sleep(SMALL_DELAY_MS);
1671	<	done = true;
1672	<	} catch(Exception e){
1670	>	realCompute();
1671	>	} catch (Throwable fail) {
1672	>	threadUnexpectedException(fail);
1673		}
1674		}
1675		}
1676
1677	<	static class TrackedMediumRunnable implements Runnable {
1678	<	volatile boolean done = false;
1679	<	public void run() {
1677	>	/**
1678	>	* Analog of CheckedCallable for RecursiveTask
1679	>	*/
1680	>	public abstract class CheckedRecursiveTask<T> extends RecursiveTask<T> {
1681	>	protected abstract T realCompute() throws Throwable;
1682	>
1683	>	@Override protected final T compute() {
1684		try {
1685	<	Thread.sleep(MEDIUM_DELAY_MS);
1686	<	done = true;
1687	<	} catch(Exception e){
1685	>	return realCompute();
1686	>	} catch (Throwable fail) {
1687	>	threadUnexpectedException(fail);
1688	>	return null;
1689		}
1690		}
1691		}
1692
1693	<	static class TrackedLongRunnable implements Runnable {
1694	<	volatile boolean done = false;
1695	<	public void run() {
1693	>	/**
1694	>	* For use as RejectedExecutionHandler in constructors
1695	>	*/
1696	>	public static class NoOpREHandler implements RejectedExecutionHandler {
1697	>	public void rejectedExecution(Runnable r,
1698	>	ThreadPoolExecutor executor) {}
1699	>	}
1700	>
1701	>	/**
1702	>	* A CyclicBarrier that uses timed await and fails with
1703	>	* AssertionErrors instead of throwing checked exceptions.
1704	>	*/
1705	>	public static class CheckedBarrier extends CyclicBarrier {
1706	>	public CheckedBarrier(int parties) { super(parties); }
1707	>
1708	>	public int await() {
1709		try {
1710	<	Thread.sleep(LONG_DELAY_MS);
1711	<	done = true;
1712	<	} catch(Exception e){
1710	>	return super.await(2 * LONG_DELAY_MS, MILLISECONDS);
1711	>	} catch (TimeoutException timedOut) {
1712	>	throw new AssertionError("timed out");
1713	>	} catch (Exception fail) {
1714	>	throw new AssertionError("Unexpected exception: " + fail, fail);
1715		}
1716		}
1717		}
1718
1719	<	static class TrackedNoOpRunnable implements Runnable {
1720	<	volatile boolean done = false;
1721	<	public void run() {
1722	<	done = true;
1719	>	void checkEmpty(BlockingQueue q) {
1720	>	try {
1721	>	assertTrue(q.isEmpty());
1722	>	assertEquals(0, q.size());
1723	>	assertNull(q.peek());
1724	>	assertNull(q.poll());
1725	>	assertNull(q.poll(randomExpiredTimeout(), randomTimeUnit()));
1726	>	assertEquals(q.toString(), "[]");
1727	>	assertTrue(Arrays.equals(q.toArray(), new Object[0]));
1728	>	assertFalse(q.iterator().hasNext());
1729	>	try {
1730	>	q.element();
1731	>	shouldThrow();
1732	>	} catch (NoSuchElementException success) {}
1733	>	try {
1734	>	q.iterator().next();
1735	>	shouldThrow();
1736	>	} catch (NoSuchElementException success) {}
1737	>	try {
1738	>	q.remove();
1739	>	shouldThrow();
1740	>	} catch (NoSuchElementException success) {}
1741	>	} catch (InterruptedException fail) { threadUnexpectedException(fail); }
1742	>	}
1743	>
1744	>	void assertSerialEquals(Object x, Object y) {
1745	>	assertTrue(Arrays.equals(serialBytes(x), serialBytes(y)));
1746	>	}
1747	>
1748	>	void assertNotSerialEquals(Object x, Object y) {
1749	>	assertFalse(Arrays.equals(serialBytes(x), serialBytes(y)));
1750	>	}
1751	>
1752	>	byte[] serialBytes(Object o) {
1753	>	try {
1754	>	ByteArrayOutputStream bos = new ByteArrayOutputStream();
1755	>	ObjectOutputStream oos = new ObjectOutputStream(bos);
1756	>	oos.writeObject(o);
1757	>	oos.flush();
1758	>	oos.close();
1759	>	return bos.toByteArray();
1760	>	} catch (Throwable fail) {
1761	>	threadUnexpectedException(fail);
1762	>	return new byte[0];
1763	>	}
1764	>	}
1765	>
1766	>	void assertImmutable(final Object o) {
1767	>	if (o instanceof Collection) {
1768	>	assertThrows(
1769	>	UnsupportedOperationException.class,
1770	>	new Runnable() { public void run() {
1771	>	((Collection) o).add(null);}});
1772	>	}
1773	>	}
1774	>
1775	>	@SuppressWarnings("unchecked")
1776	>	<T> T serialClone(T o) {
1777	>	try {
1778	>	ObjectInputStream ois = new ObjectInputStream
1779	>	(new ByteArrayInputStream(serialBytes(o)));
1780	>	T clone = (T) ois.readObject();
1781	>	if (o == clone) assertImmutable(o);
1782	>	assertSame(o.getClass(), clone.getClass());
1783	>	return clone;
1784	>	} catch (Throwable fail) {
1785	>	threadUnexpectedException(fail);
1786	>	return null;
1787		}
1788		}
1789
1790	<	static class TrackedCallable implements Callable {
1791	<	volatile boolean done = false;
1792	<	public Object call() {
1793	<	try {
1794	<	Thread.sleep(SMALL_DELAY_MS);
1795	<	done = true;
1796	<	} catch(Exception e){
1790	>	/**
1791	>	* A version of serialClone that leaves error handling (for
1792	>	* e.g. NotSerializableException) up to the caller.
1793	>	*/
1794	>	@SuppressWarnings("unchecked")
1795	>	<T> T serialClonePossiblyFailing(T o)
1796	>	throws ReflectiveOperationException, java.io.IOException {
1797	>	ByteArrayOutputStream bos = new ByteArrayOutputStream();
1798	>	ObjectOutputStream oos = new ObjectOutputStream(bos);
1799	>	oos.writeObject(o);
1800	>	oos.flush();
1801	>	oos.close();
1802	>	ObjectInputStream ois = new ObjectInputStream
1803	>	(new ByteArrayInputStream(bos.toByteArray()));
1804	>	T clone = (T) ois.readObject();
1805	>	if (o == clone) assertImmutable(o);
1806	>	assertSame(o.getClass(), clone.getClass());
1807	>	return clone;
1808	>	}
1809	>
1810	>	/**
1811	>	* If o implements Cloneable and has a public clone method,
1812	>	* returns a clone of o, else null.
1813	>	*/
1814	>	@SuppressWarnings("unchecked")
1815	>	<T> T cloneableClone(T o) {
1816	>	if (!(o instanceof Cloneable)) return null;
1817	>	final T clone;
1818	>	try {
1819	>	clone = (T) o.getClass().getMethod("clone").invoke(o);
1820	>	} catch (NoSuchMethodException ok) {
1821	>	return null;
1822	>	} catch (ReflectiveOperationException unexpected) {
1823	>	throw new Error(unexpected);
1824	>	}
1825	>	assertNotSame(o, clone); // not 100% guaranteed by spec
1826	>	assertSame(o.getClass(), clone.getClass());
1827	>	return clone;
1828	>	}
1829	>
1830	>	public void assertThrows(Class<? extends Throwable> expectedExceptionClass,
1831	>	Runnable... throwingActions) {
1832	>	for (Runnable throwingAction : throwingActions) {
1833	>	boolean threw = false;
1834	>	try { throwingAction.run(); }
1835	>	catch (Throwable t) {
1836	>	threw = true;
1837	>	if (!expectedExceptionClass.isInstance(t))
1838	>	throw new AssertionError(
1839	>	"Expected " + expectedExceptionClass.getName() +
1840	>	", got " + t.getClass().getName(),
1841	>	t);
1842		}
1843	<	return Boolean.TRUE;
1843	>	if (!threw)
1844	>	shouldThrow(expectedExceptionClass.getName());
1845		}
1846		}
1847
1848	+	public void assertIteratorExhausted(Iterator<?> it) {
1849	+	try {
1850	+	it.next();
1851	+	shouldThrow();
1852	+	} catch (NoSuchElementException success) {}
1853	+	assertFalse(it.hasNext());
1854	+	}
1855	+
1856	+	public <T> Callable<T> callableThrowing(final Exception ex) {
1857	+	return new Callable<T>() { public T call() throws Exception { throw ex; }};
1858	+	}
1859	+
1860	+	public Runnable runnableThrowing(final RuntimeException ex) {
1861	+	return new Runnable() { public void run() { throw ex; }};
1862	+	}
1863	+
1864	+	/** A reusable thread pool to be shared by tests. */
1865	+	static final ExecutorService cachedThreadPool =
1866	+	new ThreadPoolExecutor(0, Integer.MAX_VALUE,
1867	+	1000L, MILLISECONDS,
1868	+	new SynchronousQueue<Runnable>());
1869	+
1870	+	static <T> void shuffle(T[] array) {
1871	+	Collections.shuffle(Arrays.asList(array), ThreadLocalRandom.current());
1872	+	}
1873
1874		/**
1875	<	* For use as RejectedExecutionHandler in constructors
1875	>	* Returns the same String as would be returned by {@link
1876	>	* Object#toString}, whether or not the given object's class
1877	>	* overrides toString().
1878	>	*
1879	>	* @see System#identityHashCode
1880		*/
1881	<	static class NoOpREHandler implements RejectedExecutionHandler{
1882	<	public void rejectedExecution(Runnable r, ThreadPoolExecutor executor){}
1881	>	static String identityString(Object x) {
1882	>	return x.getClass().getName()
1883	>	+ "@" + Integer.toHexString(System.identityHashCode(x));
1884	>	}
1885	>
1886	>	// --- Shared assertions for Executor tests ---
1887	>
1888	>	/**
1889	>	* Returns maximum number of tasks that can be submitted to given
1890	>	* pool (with bounded queue) before saturation (when submission
1891	>	* throws RejectedExecutionException).
1892	>	*/
1893	>	static final int saturatedSize(ThreadPoolExecutor pool) {
1894	>	BlockingQueue<Runnable> q = pool.getQueue();
1895	>	return pool.getMaximumPoolSize() + q.size() + q.remainingCapacity();
1896	>	}
1897	>
1898	>	@SuppressWarnings("FutureReturnValueIgnored")
1899	>	void assertNullTaskSubmissionThrowsNullPointerException(Executor e) {
1900	>	try {
1901	>	e.execute((Runnable) null);
1902	>	shouldThrow();
1903	>	} catch (NullPointerException success) {}
1904	>
1905	>	if (! (e instanceof ExecutorService)) return;
1906	>	ExecutorService es = (ExecutorService) e;
1907	>	try {
1908	>	es.submit((Runnable) null);
1909	>	shouldThrow();
1910	>	} catch (NullPointerException success) {}
1911	>	try {
1912	>	es.submit((Runnable) null, Boolean.TRUE);
1913	>	shouldThrow();
1914	>	} catch (NullPointerException success) {}
1915	>	try {
1916	>	es.submit((Callable) null);
1917	>	shouldThrow();
1918	>	} catch (NullPointerException success) {}
1919	>
1920	>	if (! (e instanceof ScheduledExecutorService)) return;
1921	>	ScheduledExecutorService ses = (ScheduledExecutorService) e;
1922	>	try {
1923	>	ses.schedule((Runnable) null,
1924	>	randomTimeout(), randomTimeUnit());
1925	>	shouldThrow();
1926	>	} catch (NullPointerException success) {}
1927	>	try {
1928	>	ses.schedule((Callable) null,
1929	>	randomTimeout(), randomTimeUnit());
1930	>	shouldThrow();
1931	>	} catch (NullPointerException success) {}
1932	>	try {
1933	>	ses.scheduleAtFixedRate((Runnable) null,
1934	>	randomTimeout(), LONG_DELAY_MS, MILLISECONDS);
1935	>	shouldThrow();
1936	>	} catch (NullPointerException success) {}
1937	>	try {
1938	>	ses.scheduleWithFixedDelay((Runnable) null,
1939	>	randomTimeout(), LONG_DELAY_MS, MILLISECONDS);
1940	>	shouldThrow();
1941	>	} catch (NullPointerException success) {}
1942	>	}
1943	>
1944	>	void setRejectedExecutionHandler(
1945	>	ThreadPoolExecutor p, RejectedExecutionHandler handler) {
1946	>	p.setRejectedExecutionHandler(handler);
1947	>	assertSame(handler, p.getRejectedExecutionHandler());
1948	>	}
1949	>
1950	>	void assertTaskSubmissionsAreRejected(ThreadPoolExecutor p) {
1951	>	final RejectedExecutionHandler savedHandler = p.getRejectedExecutionHandler();
1952	>	final long savedTaskCount = p.getTaskCount();
1953	>	final long savedCompletedTaskCount = p.getCompletedTaskCount();
1954	>	final int savedQueueSize = p.getQueue().size();
1955	>	final boolean stock = (p.getClass().getClassLoader() == null);
1956	>
1957	>	Runnable r = () -> {};
1958	>	Callable<Boolean> c = () -> Boolean.TRUE;
1959	>
1960	>	class Recorder implements RejectedExecutionHandler {
1961	>	public volatile Runnable r = null;
1962	>	public volatile ThreadPoolExecutor p = null;
1963	>	public void reset() { r = null; p = null; }
1964	>	public void rejectedExecution(Runnable r, ThreadPoolExecutor p) {
1965	>	assertNull(this.r);
1966	>	assertNull(this.p);
1967	>	this.r = r;
1968	>	this.p = p;
1969	>	}
1970	>	}
1971	>
1972	>	// check custom handler is invoked exactly once per task
1973	>	Recorder recorder = new Recorder();
1974	>	setRejectedExecutionHandler(p, recorder);
1975	>	for (int i = 2; i--> 0; ) {
1976	>	recorder.reset();
1977	>	p.execute(r);
1978	>	if (stock && p.getClass() == ThreadPoolExecutor.class)
1979	>	assertSame(r, recorder.r);
1980	>	assertSame(p, recorder.p);
1981	>
1982	>	recorder.reset();
1983	>	assertFalse(p.submit(r).isDone());
1984	>	if (stock) assertTrue(!((FutureTask) recorder.r).isDone());
1985	>	assertSame(p, recorder.p);
1986	>
1987	>	recorder.reset();
1988	>	assertFalse(p.submit(r, Boolean.TRUE).isDone());
1989	>	if (stock) assertTrue(!((FutureTask) recorder.r).isDone());
1990	>	assertSame(p, recorder.p);
1991	>
1992	>	recorder.reset();
1993	>	assertFalse(p.submit(c).isDone());
1994	>	if (stock) assertTrue(!((FutureTask) recorder.r).isDone());
1995	>	assertSame(p, recorder.p);
1996	>
1997	>	if (p instanceof ScheduledExecutorService) {
1998	>	ScheduledExecutorService s = (ScheduledExecutorService) p;
1999	>	ScheduledFuture<?> future;
2000	>
2001	>	recorder.reset();
2002	>	future = s.schedule(r, randomTimeout(), randomTimeUnit());
2003	>	assertFalse(future.isDone());
2004	>	if (stock) assertTrue(!((FutureTask) recorder.r).isDone());
2005	>	assertSame(p, recorder.p);
2006	>
2007	>	recorder.reset();
2008	>	future = s.schedule(c, randomTimeout(), randomTimeUnit());
2009	>	assertFalse(future.isDone());
2010	>	if (stock) assertTrue(!((FutureTask) recorder.r).isDone());
2011	>	assertSame(p, recorder.p);
2012	>
2013	>	recorder.reset();
2014	>	future = s.scheduleAtFixedRate(r, randomTimeout(), LONG_DELAY_MS, MILLISECONDS);
2015	>	assertFalse(future.isDone());
2016	>	if (stock) assertTrue(!((FutureTask) recorder.r).isDone());
2017	>	assertSame(p, recorder.p);
2018	>
2019	>	recorder.reset();
2020	>	future = s.scheduleWithFixedDelay(r, randomTimeout(), LONG_DELAY_MS, MILLISECONDS);
2021	>	assertFalse(future.isDone());
2022	>	if (stock) assertTrue(!((FutureTask) recorder.r).isDone());
2023	>	assertSame(p, recorder.p);
2024	>	}
2025	>	}
2026	>
2027	>	// Checking our custom handler above should be sufficient, but
2028	>	// we add some integration tests of standard handlers.
2029	>	final AtomicReference<Thread> thread = new AtomicReference<>();
2030	>	final Runnable setThread = () -> thread.set(Thread.currentThread());
2031	>
2032	>	setRejectedExecutionHandler(p, new ThreadPoolExecutor.AbortPolicy());
2033	>	try {
2034	>	p.execute(setThread);
2035	>	shouldThrow();
2036	>	} catch (RejectedExecutionException success) {}
2037	>	assertNull(thread.get());
2038	>
2039	>	setRejectedExecutionHandler(p, new ThreadPoolExecutor.DiscardPolicy());
2040	>	p.execute(setThread);
2041	>	assertNull(thread.get());
2042	>
2043	>	setRejectedExecutionHandler(p, new ThreadPoolExecutor.CallerRunsPolicy());
2044	>	p.execute(setThread);
2045	>	if (p.isShutdown())
2046	>	assertNull(thread.get());
2047	>	else
2048	>	assertSame(Thread.currentThread(), thread.get());
2049	>
2050	>	setRejectedExecutionHandler(p, savedHandler);
2051	>
2052	>	// check that pool was not perturbed by handlers
2053	>	assertEquals(savedTaskCount, p.getTaskCount());
2054	>	assertEquals(savedCompletedTaskCount, p.getCompletedTaskCount());
2055	>	assertEquals(savedQueueSize, p.getQueue().size());
2056	>	}
2057	>
2058	>	void assertCollectionsEquals(Collection<?> x, Collection<?> y) {
2059	>	assertEquals(x, y);
2060	>	assertEquals(y, x);
2061	>	assertEquals(x.isEmpty(), y.isEmpty());
2062	>	assertEquals(x.size(), y.size());
2063	>	if (x instanceof List) {
2064	>	assertEquals(x.toString(), y.toString());
2065	>	}
2066	>	if (x instanceof List || x instanceof Set) {
2067	>	assertEquals(x.hashCode(), y.hashCode());
2068	>	}
2069	>	if (x instanceof List || x instanceof Deque) {
2070	>	assertTrue(Arrays.equals(x.toArray(), y.toArray()));
2071	>	assertTrue(Arrays.equals(x.toArray(new Object[0]),
2072	>	y.toArray(new Object[0])));
2073	>	}
2074	>	}
2075	>
2076	>	/**
2077	>	* A weaker form of assertCollectionsEquals which does not insist
2078	>	* that the two collections satisfy Object#equals(Object), since
2079	>	* they may use identity semantics as Deques do.
2080	>	*/
2081	>	void assertCollectionsEquivalent(Collection<?> x, Collection<?> y) {
2082	>	if (x instanceof List || x instanceof Set)
2083	>	assertCollectionsEquals(x, y);
2084	>	else {
2085	>	assertEquals(x.isEmpty(), y.isEmpty());
2086	>	assertEquals(x.size(), y.size());
2087	>	assertEquals(new HashSet(x), new HashSet(y));
2088	>	if (x instanceof Deque) {
2089	>	assertTrue(Arrays.equals(x.toArray(), y.toArray()));
2090	>	assertTrue(Arrays.equals(x.toArray(new Object[0]),
2091	>	y.toArray(new Object[0])));
2092	>	}
2093	>	}
2094		}
572	–
573	–
2095		}

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