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

Comparing jsr166/src/test/tck/JSR166TestCase.java (file contents):
Revision 1.25 by dl, Tue Mar 1 01:32:00 2005 UTC vs.
Revision 1.244 by jsr166, Tue Apr 10 18:09:58 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	+	public static boolean atLeastJava11() { return JAVA_CLASS_VERSION >= 55.0; }
455	+
456		/**
457	<	* Collects all JSR166 unit tests as one suite
458	<	*/
459	<	public static Test suite ( ) {
460	<	TestSuite suite = new TestSuite("JSR166 Unit Tests");
461	<
462	<	suite.addTest(new TestSuite(AbstractExecutorServiceTest.class));
463	<	suite.addTest(new TestSuite(AbstractQueueTest.class));
464	<	suite.addTest(new TestSuite(AbstractQueuedSynchronizerTest.class));
465	<	suite.addTest(new TestSuite(AbstractQueuedLongSynchronizerTest.class));
466	<	suite.addTest(new TestSuite(ArrayBlockingQueueTest.class));
467	<	suite.addTest(new TestSuite(ArrayDequeTest.class));
468	<	suite.addTest(new TestSuite(AtomicBooleanTest.class));
469	<	suite.addTest(new TestSuite(AtomicIntegerArrayTest.class));
470	<	suite.addTest(new TestSuite(AtomicIntegerFieldUpdaterTest.class));
471	<	suite.addTest(new TestSuite(AtomicIntegerTest.class));
472	<	suite.addTest(new TestSuite(AtomicLongArrayTest.class));
473	<	suite.addTest(new TestSuite(AtomicLongFieldUpdaterTest.class));
474	<	suite.addTest(new TestSuite(AtomicLongTest.class));
475	<	suite.addTest(new TestSuite(AtomicMarkableReferenceTest.class));
476	<	suite.addTest(new TestSuite(AtomicReferenceArrayTest.class));
477	<	suite.addTest(new TestSuite(AtomicReferenceFieldUpdaterTest.class));
478	<	suite.addTest(new TestSuite(AtomicReferenceTest.class));
479	<	suite.addTest(new TestSuite(AtomicStampedReferenceTest.class));
480	<	suite.addTest(new TestSuite(ConcurrentHashMapTest.class));
481	<	suite.addTest(new TestSuite(ConcurrentLinkedQueueTest.class));
482	<	suite.addTest(new TestSuite(ConcurrentSkipListMapTest.class));
483	<	suite.addTest(new TestSuite(ConcurrentSkipListSubMapTest.class));
484	<	suite.addTest(new TestSuite(ConcurrentSkipListSetTest.class));
485	<	suite.addTest(new TestSuite(ConcurrentSkipListSubSetTest.class));
486	<	suite.addTest(new TestSuite(CopyOnWriteArrayListTest.class));
487	<	suite.addTest(new TestSuite(CopyOnWriteArraySetTest.class));
488	<	suite.addTest(new TestSuite(CountDownLatchTest.class));
489	<	suite.addTest(new TestSuite(CyclicBarrierTest.class));
490	<	suite.addTest(new TestSuite(DelayQueueTest.class));
491	<	suite.addTest(new TestSuite(ExchangerTest.class));
492	<	suite.addTest(new TestSuite(ExecutorsTest.class));
493	<	suite.addTest(new TestSuite(ExecutorCompletionServiceTest.class));
494	<	suite.addTest(new TestSuite(FutureTaskTest.class));
495	<	suite.addTest(new TestSuite(LinkedBlockingDequeTest.class));
496	<	suite.addTest(new TestSuite(LinkedBlockingQueueTest.class));
497	<	suite.addTest(new TestSuite(LinkedListTest.class));
498	<	suite.addTest(new TestSuite(LockSupportTest.class));
499	<	suite.addTest(new TestSuite(PriorityBlockingQueueTest.class));
500	<	suite.addTest(new TestSuite(PriorityQueueTest.class));
501	<	suite.addTest(new TestSuite(ReentrantLockTest.class));
502	<	suite.addTest(new TestSuite(ReentrantReadWriteLockTest.class));
503	<	suite.addTest(new TestSuite(ScheduledExecutorTest.class));
504	<	suite.addTest(new TestSuite(SemaphoreTest.class));
505	<	suite.addTest(new TestSuite(SynchronousQueueTest.class));
506	<	suite.addTest(new TestSuite(SystemTest.class));
507	<	suite.addTest(new TestSuite(ThreadLocalTest.class));
508	<	suite.addTest(new TestSuite(ThreadPoolExecutorTest.class));
509	<	suite.addTest(new TestSuite(ThreadTest.class));
510	<	suite.addTest(new TestSuite(TimeUnitTest.class));
511	<	suite.addTest(new TestSuite(TreeMapTest.class));
512	<	suite.addTest(new TestSuite(TreeSetTest.class));
513	<
457	>	* Collects all JSR166 unit tests as one suite.
458	>	*/
459	>	public static Test suite() {
460	>	// Java7+ test classes
461	>	TestSuite suite = newTestSuite(
462	>	ForkJoinPoolTest.suite(),
463	>	ForkJoinTaskTest.suite(),
464	>	RecursiveActionTest.suite(),
465	>	RecursiveTaskTest.suite(),
466	>	LinkedTransferQueueTest.suite(),
467	>	PhaserTest.suite(),
468	>	ThreadLocalRandomTest.suite(),
469	>	AbstractExecutorServiceTest.suite(),
470	>	AbstractQueueTest.suite(),
471	>	AbstractQueuedSynchronizerTest.suite(),
472	>	AbstractQueuedLongSynchronizerTest.suite(),
473	>	ArrayBlockingQueueTest.suite(),
474	>	ArrayDequeTest.suite(),
475	>	ArrayListTest.suite(),
476	>	AtomicBooleanTest.suite(),
477	>	AtomicIntegerArrayTest.suite(),
478	>	AtomicIntegerFieldUpdaterTest.suite(),
479	>	AtomicIntegerTest.suite(),
480	>	AtomicLongArrayTest.suite(),
481	>	AtomicLongFieldUpdaterTest.suite(),
482	>	AtomicLongTest.suite(),
483	>	AtomicMarkableReferenceTest.suite(),
484	>	AtomicReferenceArrayTest.suite(),
485	>	AtomicReferenceFieldUpdaterTest.suite(),
486	>	AtomicReferenceTest.suite(),
487	>	AtomicStampedReferenceTest.suite(),
488	>	ConcurrentHashMapTest.suite(),
489	>	ConcurrentLinkedDequeTest.suite(),
490	>	ConcurrentLinkedQueueTest.suite(),
491	>	ConcurrentSkipListMapTest.suite(),
492	>	ConcurrentSkipListSubMapTest.suite(),
493	>	ConcurrentSkipListSetTest.suite(),
494	>	ConcurrentSkipListSubSetTest.suite(),
495	>	CopyOnWriteArrayListTest.suite(),
496	>	CopyOnWriteArraySetTest.suite(),
497	>	CountDownLatchTest.suite(),
498	>	CountedCompleterTest.suite(),
499	>	CyclicBarrierTest.suite(),
500	>	DelayQueueTest.suite(),
501	>	EntryTest.suite(),
502	>	ExchangerTest.suite(),
503	>	ExecutorsTest.suite(),
504	>	ExecutorCompletionServiceTest.suite(),
505	>	FutureTaskTest.suite(),
506	>	LinkedBlockingDequeTest.suite(),
507	>	LinkedBlockingQueueTest.suite(),
508	>	LinkedListTest.suite(),
509	>	LockSupportTest.suite(),
510	>	PriorityBlockingQueueTest.suite(),
511	>	PriorityQueueTest.suite(),
512	>	ReentrantLockTest.suite(),
513	>	ReentrantReadWriteLockTest.suite(),
514	>	ScheduledExecutorTest.suite(),
515	>	ScheduledExecutorSubclassTest.suite(),
516	>	SemaphoreTest.suite(),
517	>	SynchronousQueueTest.suite(),
518	>	SystemTest.suite(),
519	>	ThreadLocalTest.suite(),
520	>	ThreadPoolExecutorTest.suite(),
521	>	ThreadPoolExecutorSubclassTest.suite(),
522	>	ThreadTest.suite(),
523	>	TimeUnitTest.suite(),
524	>	TreeMapTest.suite(),
525	>	TreeSetTest.suite(),
526	>	TreeSubMapTest.suite(),
527	>	TreeSubSetTest.suite(),
528	>	VectorTest.suite());
529	>
530	>	// Java8+ test classes
531	>	if (atLeastJava8()) {
532	>	String[] java8TestClassNames = {
533	>	"ArrayDeque8Test",
534	>	"Atomic8Test",
535	>	"CompletableFutureTest",
536	>	"ConcurrentHashMap8Test",
537	>	"CountedCompleter8Test",
538	>	"DoubleAccumulatorTest",
539	>	"DoubleAdderTest",
540	>	"ForkJoinPool8Test",
541	>	"ForkJoinTask8Test",
542	>	"HashMapTest",
543	>	"LinkedBlockingDeque8Test",
544	>	"LinkedBlockingQueue8Test",
545	>	"LongAccumulatorTest",
546	>	"LongAdderTest",
547	>	"SplittableRandomTest",
548	>	"StampedLockTest",
549	>	"SubmissionPublisherTest",
550	>	"ThreadLocalRandom8Test",
551	>	"TimeUnit8Test",
552	>	};
553	>	addNamedTestClasses(suite, java8TestClassNames);
554	>	}
555	>
556	>	// Java9+ test classes
557	>	if (atLeastJava9()) {
558	>	String[] java9TestClassNames = {
559	>	"AtomicBoolean9Test",
560	>	"AtomicInteger9Test",
561	>	"AtomicIntegerArray9Test",
562	>	"AtomicLong9Test",
563	>	"AtomicLongArray9Test",
564	>	"AtomicReference9Test",
565	>	"AtomicReferenceArray9Test",
566	>	"ExecutorCompletionService9Test",
567	>	"ForkJoinPool9Test",
568	>	};
569	>	addNamedTestClasses(suite, java9TestClassNames);
570	>	}
571	>
572		return suite;
573		}
574
575	+	/** Returns list of junit-style test method names in given class. */
576	+	public static ArrayList<String> testMethodNames(Class<?> testClass) {
577	+	Method[] methods = testClass.getDeclaredMethods();
578	+	ArrayList<String> names = new ArrayList<>(methods.length);
579	+	for (Method method : methods) {
580	+	if (method.getName().startsWith("test")
581	+	&& Modifier.isPublic(method.getModifiers())
582	+	// method.getParameterCount() requires jdk8+
583	+	&& method.getParameterTypes().length == 0) {
584	+	names.add(method.getName());
585	+	}
586	+	}
587	+	return names;
588	+	}
589	+
590	+	/**
591	+	* Returns junit-style testSuite for the given test class, but
592	+	* parameterized by passing extra data to each test.
593	+	*/
594	+	public static <ExtraData> Test parameterizedTestSuite
595	+	(Class<? extends JSR166TestCase> testClass,
596	+	Class<ExtraData> dataClass,
597	+	ExtraData data) {
598	+	try {
599	+	TestSuite suite = new TestSuite();
600	+	Constructor c =
601	+	testClass.getDeclaredConstructor(dataClass, String.class);
602	+	for (String methodName : testMethodNames(testClass))
603	+	suite.addTest((Test) c.newInstance(data, methodName));
604	+	return suite;
605	+	} catch (ReflectiveOperationException e) {
606	+	throw new AssertionError(e);
607	+	}
608	+	}
609	+
610	+	/**
611	+	* Returns junit-style testSuite for the jdk8 extension of the
612	+	* given test class, but parameterized by passing extra data to
613	+	* each test.  Uses reflection to allow compilation in jdk7.
614	+	*/
615	+	public static <ExtraData> Test jdk8ParameterizedTestSuite
616	+	(Class<? extends JSR166TestCase> testClass,
617	+	Class<ExtraData> dataClass,
618	+	ExtraData data) {
619	+	if (atLeastJava8()) {
620	+	String name = testClass.getName();
621	+	String name8 = name.replaceAll("Test$", "8Test");
622	+	if (name.equals(name8)) throw new AssertionError(name);
623	+	try {
624	+	return (Test)
625	+	Class.forName(name8)
626	+	.getMethod("testSuite", dataClass)
627	+	.invoke(null, data);
628	+	} catch (ReflectiveOperationException e) {
629	+	throw new AssertionError(e);
630	+	}
631	+	} else {
632	+	return new TestSuite();
633	+	}
634	+	}
635	+
636	+	// Delays for timing-dependent tests, in milliseconds.
637
638		public static long SHORT_DELAY_MS;
639		public static long SMALL_DELAY_MS;
640		public static long MEDIUM_DELAY_MS;
641		public static long LONG_DELAY_MS;
642
643	+	private static final long RANDOM_TIMEOUT;
644	+	private static final long RANDOM_EXPIRED_TIMEOUT;
645	+	private static final TimeUnit RANDOM_TIMEUNIT;
646	+	static {
647	+	ThreadLocalRandom rnd = ThreadLocalRandom.current();
648	+	long[] timeouts = { Long.MIN_VALUE, -1, 0, 1, Long.MAX_VALUE };
649	+	RANDOM_TIMEOUT = timeouts[rnd.nextInt(timeouts.length)];
650	+	RANDOM_EXPIRED_TIMEOUT = timeouts[rnd.nextInt(3)];
651	+	TimeUnit[] timeUnits = TimeUnit.values();
652	+	RANDOM_TIMEUNIT = timeUnits[rnd.nextInt(timeUnits.length)];
653	+	}
654
655		/**
656	<	* Return the shortest timed delay. This could
657	<	* be reimplemented to use for example a Property.
658	<	*/
656	>	* Returns a timeout for use when any value at all will do.
657	>	*/
658	>	static long randomTimeout() { return RANDOM_TIMEOUT; }
659	>
660	>	/**
661	>	* Returns a timeout that means "no waiting", i.e. not positive.
662	>	*/
663	>	static long randomExpiredTimeout() { return RANDOM_EXPIRED_TIMEOUT; }
664	>
665	>	/**
666	>	* Returns a random non-null TimeUnit.
667	>	*/
668	>	static TimeUnit randomTimeUnit() { return RANDOM_TIMEUNIT; }
669	>
670	>	/**
671	>	* Returns the shortest timed delay. This can be scaled up for
672	>	* slow machines using the jsr166.delay.factor system property,
673	>	* or via jtreg's -timeoutFactor: flag.
674	>	* http://openjdk.java.net/jtreg/command-help.html
675	>	*/
676		protected long getShortDelay() {
677	<	return 50;
677	>	return (long) (50 * delayFactor);
678		}
679
181	–
680		/**
681	<	* Set delays as multiples of SHORT_DELAY.
681	>	* Sets delays as multiples of SHORT_DELAY.
682		*/
683	<	protected  void setDelays() {
683	>	protected void setDelays() {
684		SHORT_DELAY_MS = getShortDelay();
685	<	SMALL_DELAY_MS = SHORT_DELAY_MS * 5;
685	>	SMALL_DELAY_MS  = SHORT_DELAY_MS * 5;
686		MEDIUM_DELAY_MS = SHORT_DELAY_MS * 10;
687	<	LONG_DELAY_MS = SHORT_DELAY_MS * 50;
687	>	LONG_DELAY_MS   = SHORT_DELAY_MS * 200;
688		}
689
690	+	private static final long TIMEOUT_DELAY_MS
691	+	= (long) (12.0 * Math.cbrt(delayFactor));
692	+
693		/**
694	<	* Flag set true if any threadAssert methods fail
694	>	* Returns a timeout in milliseconds to be used in tests that verify
695	>	* that operations block or time out.  We want this to be longer
696	>	* than the OS scheduling quantum, but not too long, so don't scale
697	>	* linearly with delayFactor; we use "crazy" cube root instead.
698		*/
699	<	volatile boolean threadFailed;
699	>	static long timeoutMillis() {
700	>	return TIMEOUT_DELAY_MS;
701	>	}
702	>
703	>	/**
704	>	* Returns a new Date instance representing a time at least
705	>	* delayMillis milliseconds in the future.
706	>	*/
707	>	Date delayedDate(long delayMillis) {
708	>	// Add 1 because currentTimeMillis is known to round into the past.
709	>	return new Date(System.currentTimeMillis() + delayMillis + 1);
710	>	}
711
712		/**
713	<	* Initialize test to indicate that no thread assertions have failed
713	>	* The first exception encountered if any threadAssertXXX method fails.
714		*/
715	<	public void setUp() {
715	>	private final AtomicReference<Throwable> threadFailure
716	>	= new AtomicReference<>(null);
717	>
718	>	/**
719	>	* Records an exception so that it can be rethrown later in the test
720	>	* harness thread, triggering a test case failure.  Only the first
721	>	* failure is recorded; subsequent calls to this method from within
722	>	* the same test have no effect.
723	>	*/
724	>	public void threadRecordFailure(Throwable t) {
725	>	System.err.println(t);
726	>	dumpTestThreads();
727	>	threadFailure.compareAndSet(null, t);
728	>	}
729	>
730	>	public void setUp() {
731		setDelays();
732	<	threadFailed = false;
732	>	}
733	>
734	>	void tearDownFail(String format, Object... args) {
735	>	String msg = toString() + ": " + String.format(format, args);
736	>	System.err.println(msg);
737	>	dumpTestThreads();
738	>	throw new AssertionError(msg);
739	>	}
740	>
741	>	/**
742	>	* Extra checks that get done for all test cases.
743	>	*
744	>	* Triggers test case failure if any thread assertions have failed,
745	>	* by rethrowing, in the test harness thread, any exception recorded
746	>	* earlier by threadRecordFailure.
747	>	*
748	>	* Triggers test case failure if interrupt status is set in the main thread.
749	>	*/
750	>	public void tearDown() throws Exception {
751	>	Throwable t = threadFailure.getAndSet(null);
752	>	if (t != null) {
753	>	if (t instanceof Error)
754	>	throw (Error) t;
755	>	else if (t instanceof RuntimeException)
756	>	throw (RuntimeException) t;
757	>	else if (t instanceof Exception)
758	>	throw (Exception) t;
759	>	else
760	>	throw new AssertionError(t.toString(), t);
761	>	}
762	>
763	>	if (Thread.interrupted())
764	>	tearDownFail("interrupt status set in main thread");
765	>
766	>	checkForkJoinPoolThreadLeaks();
767		}
768
769		/**
770	<	* Trigger test case failure if any thread assertions have failed
770	>	* Finds missing PoolCleaners
771		*/
772	<	public void tearDown() {
773	<	assertFalse(threadFailed);
772	>	void checkForkJoinPoolThreadLeaks() throws InterruptedException {
773	>	Thread[] survivors = new Thread[7];
774	>	int count = Thread.enumerate(survivors);
775	>	for (int i = 0; i < count; i++) {
776	>	Thread thread = survivors[i];
777	>	String name = thread.getName();
778	>	if (name.startsWith("ForkJoinPool-")) {
779	>	// give thread some time to terminate
780	>	thread.join(LONG_DELAY_MS);
781	>	if (thread.isAlive())
782	>	tearDownFail("Found leaked ForkJoinPool thread thread=%s",
783	>	thread);
784	>	}
785	>	}
786	>
787	>	if (!ForkJoinPool.commonPool()
788	>	.awaitQuiescence(LONG_DELAY_MS, MILLISECONDS))
789	>	tearDownFail("ForkJoin common pool thread stuck");
790		}
791
792		/**
793	<	* Fail, also setting status to indicate current testcase should fail
794	<	*/
793	>	* Just like fail(reason), but additionally recording (using
794	>	* threadRecordFailure) any AssertionError thrown, so that the
795	>	* current testcase will fail.
796	>	*/
797		public void threadFail(String reason) {
798	<	threadFailed = true;
799	<	fail(reason);
798	>	try {
799	>	fail(reason);
800	>	} catch (AssertionError fail) {
801	>	threadRecordFailure(fail);
802	>	throw fail;
803	>	}
804		}
805
806		/**
807	<	* If expression not true, set status to indicate current testcase
808	<	* should fail
809	<	*/
807	>	* Just like assertTrue(b), but additionally recording (using
808	>	* threadRecordFailure) any AssertionError thrown, so that the
809	>	* current testcase will fail.
810	>	*/
811		public void threadAssertTrue(boolean b) {
812	<	if (!b) {
226	<	threadFailed = true;
812	>	try {
813		assertTrue(b);
814	+	} catch (AssertionError fail) {
815	+	threadRecordFailure(fail);
816	+	throw fail;
817		}
818		}
819
820		/**
821	<	* If expression not false, set status to indicate current testcase
822	<	* should fail
823	<	*/
821	>	* Just like assertFalse(b), but additionally recording (using
822	>	* threadRecordFailure) any AssertionError thrown, so that the
823	>	* current testcase will fail.
824	>	*/
825		public void threadAssertFalse(boolean b) {
826	<	if (b) {
237	<	threadFailed = true;
826	>	try {
827		assertFalse(b);
828	+	} catch (AssertionError fail) {
829	+	threadRecordFailure(fail);
830	+	throw fail;
831		}
832		}
833
834		/**
835	<	* If argument not null, set status to indicate current testcase
836	<	* should fail
837	<	*/
835	>	* Just like assertNull(x), but additionally recording (using
836	>	* threadRecordFailure) any AssertionError thrown, so that the
837	>	* current testcase will fail.
838	>	*/
839		public void threadAssertNull(Object x) {
840	<	if (x != null) {
248	<	threadFailed = true;
840	>	try {
841		assertNull(x);
842	+	} catch (AssertionError fail) {
843	+	threadRecordFailure(fail);
844	+	throw fail;
845		}
846		}
847
848		/**
849	<	* If arguments not equal, set status to indicate current testcase
850	<	* should fail
851	<	*/
849	>	* Just like assertEquals(x, y), but additionally recording (using
850	>	* threadRecordFailure) any AssertionError thrown, so that the
851	>	* current testcase will fail.
852	>	*/
853		public void threadAssertEquals(long x, long y) {
854	<	if (x != y) {
259	<	threadFailed = true;
854	>	try {
855		assertEquals(x, y);
856	+	} catch (AssertionError fail) {
857	+	threadRecordFailure(fail);
858	+	throw fail;
859		}
860		}
861
862		/**
863	<	* If arguments not equal, set status to indicate current testcase
864	<	* should fail
865	<	*/
863	>	* Just like assertEquals(x, y), but additionally recording (using
864	>	* threadRecordFailure) any AssertionError thrown, so that the
865	>	* current testcase will fail.
866	>	*/
867		public void threadAssertEquals(Object x, Object y) {
868	<	if (x != y && (x == null || !x.equals(y))) {
270	<	threadFailed = true;
868	>	try {
869		assertEquals(x, y);
870	+	} catch (AssertionError fail) {
871	+	threadRecordFailure(fail);
872	+	throw fail;
873	+	} catch (Throwable fail) {
874	+	threadUnexpectedException(fail);
875		}
876		}
877
878		/**
879	<	* threadFail with message "should throw exception"
880	<	*/
879	>	* Just like assertSame(x, y), but additionally recording (using
880	>	* threadRecordFailure) any AssertionError thrown, so that the
881	>	* current testcase will fail.
882	>	*/
883	>	public void threadAssertSame(Object x, Object y) {
884	>	try {
885	>	assertSame(x, y);
886	>	} catch (AssertionError fail) {
887	>	threadRecordFailure(fail);
888	>	throw fail;
889	>	}
890	>	}
891	>
892	>	/**
893	>	* Calls threadFail with message "should throw exception".
894	>	*/
895		public void threadShouldThrow() {
896	<	threadFailed = true;
897	<	fail("should throw exception");
896	>	threadFail("should throw exception");
897	>	}
898	>
899	>	/**
900	>	* Calls threadFail with message "should throw" + exceptionName.
901	>	*/
902	>	public void threadShouldThrow(String exceptionName) {
903	>	threadFail("should throw " + exceptionName);
904	>	}
905	>
906	>	/**
907	>	* Records the given exception using {@link #threadRecordFailure},
908	>	* then rethrows the exception, wrapping it in an AssertionError
909	>	* if necessary.
910	>	*/
911	>	public void threadUnexpectedException(Throwable t) {
912	>	threadRecordFailure(t);
913	>	t.printStackTrace();
914	>	if (t instanceof RuntimeException)
915	>	throw (RuntimeException) t;
916	>	else if (t instanceof Error)
917	>	throw (Error) t;
918	>	else
919	>	throw new AssertionError("unexpected exception: " + t, t);
920	>	}
921	>
922	>	/**
923	>	* Delays, via Thread.sleep, for the given millisecond delay, but
924	>	* if the sleep is shorter than specified, may re-sleep or yield
925	>	* until time elapses.  Ensures that the given time, as measured
926	>	* by System.nanoTime(), has elapsed.
927	>	*/
928	>	static void delay(long millis) throws InterruptedException {
929	>	long nanos = millis * (1000 * 1000);
930	>	final long wakeupTime = System.nanoTime() + nanos;
931	>	do {
932	>	if (millis > 0L)
933	>	Thread.sleep(millis);
934	>	else // too short to sleep
935	>	Thread.yield();
936	>	nanos = wakeupTime - System.nanoTime();
937	>	millis = nanos / (1000 * 1000);
938	>	} while (nanos >= 0L);
939	>	}
940	>
941	>	/**
942	>	* Allows use of try-with-resources with per-test thread pools.
943	>	*/
944	>	class PoolCleaner implements AutoCloseable {
945	>	private final ExecutorService pool;
946	>	public PoolCleaner(ExecutorService pool) { this.pool = pool; }
947	>	public void close() { joinPool(pool); }
948		}
949
950		/**
951	<	* threadFail with message "Unexpected exception"
951	>	* An extension of PoolCleaner that has an action to release the pool.
952		*/
953	<	public void threadUnexpectedException() {
954	<	threadFailed = true;
955	<	fail("Unexpected exception");
953	>	class PoolCleanerWithReleaser extends PoolCleaner {
954	>	private final Runnable releaser;
955	>	public PoolCleanerWithReleaser(ExecutorService pool, Runnable releaser) {
956	>	super(pool);
957	>	this.releaser = releaser;
958	>	}
959	>	public void close() {
960	>	try {
961	>	releaser.run();
962	>	} finally {
963	>	super.close();
964	>	}
965	>	}
966	>	}
967	>
968	>	PoolCleaner cleaner(ExecutorService pool) {
969	>	return new PoolCleaner(pool);
970		}
971
972	+	PoolCleaner cleaner(ExecutorService pool, Runnable releaser) {
973	+	return new PoolCleanerWithReleaser(pool, releaser);
974	+	}
975	+
976	+	PoolCleaner cleaner(ExecutorService pool, CountDownLatch latch) {
977	+	return new PoolCleanerWithReleaser(pool, releaser(latch));
978	+	}
979	+
980	+	Runnable releaser(final CountDownLatch latch) {
981	+	return new Runnable() { public void run() {
982	+	do { latch.countDown(); }
983	+	while (latch.getCount() > 0);
984	+	}};
985	+	}
986	+
987	+	PoolCleaner cleaner(ExecutorService pool, AtomicBoolean flag) {
988	+	return new PoolCleanerWithReleaser(pool, releaser(flag));
989	+	}
990	+
991	+	Runnable releaser(final AtomicBoolean flag) {
992	+	return new Runnable() { public void run() { flag.set(true); }};
993	+	}
994
995		/**
996	<	* Wait out termination of a thread pool or fail doing so
996	>	* Waits out termination of a thread pool or fails doing so.
997		*/
998	<	public void joinPool(ExecutorService exec) {
998	>	void joinPool(ExecutorService pool) {
999		try {
1000	<	exec.shutdown();
1001	<	assertTrue(exec.awaitTermination(LONG_DELAY_MS, TimeUnit.MILLISECONDS));
1002	<	} catch(SecurityException ok) {
1000	>	pool.shutdown();
1001	>	if (!pool.awaitTermination(2 * LONG_DELAY_MS, MILLISECONDS)) {
1002	>	try {
1003	>	threadFail("ExecutorService " + pool +
1004	>	" did not terminate in a timely manner");
1005	>	} finally {
1006	>	// last resort, for the benefit of subsequent tests
1007	>	pool.shutdownNow();
1008	>	pool.awaitTermination(MEDIUM_DELAY_MS, MILLISECONDS);
1009	>	}
1010	>	}
1011	>	} catch (SecurityException ok) {
1012		// Allowed in case test doesn't have privs
1013	<	} catch(InterruptedException ie) {
1014	<	fail("Unexpected exception");
1013	>	} catch (InterruptedException fail) {
1014	>	threadFail("Unexpected InterruptedException");
1015		}
1016		}
1017
1018	+	/**
1019	+	* Like Runnable, but with the freedom to throw anything.
1020	+	* junit folks had the same idea:
1021	+	* http://junit.org/junit5/docs/snapshot/api/org/junit/gen5/api/Executable.html
1022	+	*/
1023	+	interface Action { public void run() throws Throwable; }
1024	+
1025	+	/**
1026	+	* Runs all the given actions in parallel, failing if any fail.
1027	+	* Useful for running multiple variants of tests that are
1028	+	* necessarily individually slow because they must block.
1029	+	*/
1030	+	void testInParallel(Action ... actions) {
1031	+	ExecutorService pool = Executors.newCachedThreadPool();
1032	+	try (PoolCleaner cleaner = cleaner(pool)) {
1033	+	ArrayList<Future<?>> futures = new ArrayList<>(actions.length);
1034	+	for (final Action action : actions)
1035	+	futures.add(pool.submit(new CheckedRunnable() {
1036	+	public void realRun() throws Throwable { action.run();}}));
1037	+	for (Future<?> future : futures)
1038	+	try {
1039	+	assertNull(future.get(LONG_DELAY_MS, MILLISECONDS));
1040	+	} catch (ExecutionException ex) {
1041	+	threadUnexpectedException(ex.getCause());
1042	+	} catch (Exception ex) {
1043	+	threadUnexpectedException(ex);
1044	+	}
1045	+	}
1046	+	}
1047	+
1048	+	/**
1049	+	* A debugging tool to print stack traces of most threads, as jstack does.
1050	+	* Uninteresting threads are filtered out.
1051	+	*/
1052	+	static void dumpTestThreads() {
1053	+	SecurityManager sm = System.getSecurityManager();
1054	+	if (sm != null) {
1055	+	try {
1056	+	System.setSecurityManager(null);
1057	+	} catch (SecurityException giveUp) {
1058	+	return;
1059	+	}
1060	+	}
1061	+
1062	+	ThreadMXBean threadMXBean = ManagementFactory.getThreadMXBean();
1063	+	System.err.println("------ stacktrace dump start ------");
1064	+	for (ThreadInfo info : threadMXBean.dumpAllThreads(true, true)) {
1065	+	final String name = info.getThreadName();
1066	+	String lockName;
1067	+	if ("Signal Dispatcher".equals(name))
1068	+	continue;
1069	+	if ("Reference Handler".equals(name)
1070	+	&& (lockName = info.getLockName()) != null
1071	+	&& lockName.startsWith("java.lang.ref.Reference$Lock"))
1072	+	continue;
1073	+	if ("Finalizer".equals(name)
1074	+	&& (lockName = info.getLockName()) != null
1075	+	&& lockName.startsWith("java.lang.ref.ReferenceQueue$Lock"))
1076	+	continue;
1077	+	if ("checkForWedgedTest".equals(name))
1078	+	continue;
1079	+	System.err.print(info);
1080	+	}
1081	+	System.err.println("------ stacktrace dump end ------");
1082	+
1083	+	if (sm != null) System.setSecurityManager(sm);
1084	+	}
1085
1086		/**
1087	<	* fail with message "should throw exception"
1088	<	*/
1087	>	* Checks that thread eventually enters the expected blocked thread state.
1088	>	*/
1089	>	void assertThreadBlocks(Thread thread, Thread.State expected) {
1090	>	// always sleep at least 1 ms, with high probability avoiding
1091	>	// transitory states
1092	>	for (long retries = LONG_DELAY_MS * 3 / 4; retries-->0; ) {
1093	>	try { delay(1); }
1094	>	catch (InterruptedException fail) {
1095	>	throw new AssertionError("Unexpected InterruptedException", fail);
1096	>	}
1097	>	Thread.State s = thread.getState();
1098	>	if (s == expected)
1099	>	return;
1100	>	else if (s == Thread.State.TERMINATED)
1101	>	fail("Unexpected thread termination");
1102	>	}
1103	>	fail("timed out waiting for thread to enter thread state " + expected);
1104	>	}
1105	>
1106	>	/**
1107	>	* Checks that future.get times out, with the default timeout of
1108	>	* {@code timeoutMillis()}.
1109	>	*/
1110	>	void assertFutureTimesOut(Future future) {
1111	>	assertFutureTimesOut(future, timeoutMillis());
1112	>	}
1113	>
1114	>	/**
1115	>	* Checks that future.get times out, with the given millisecond timeout.
1116	>	*/
1117	>	void assertFutureTimesOut(Future future, long timeoutMillis) {
1118	>	long startTime = System.nanoTime();
1119	>	try {
1120	>	future.get(timeoutMillis, MILLISECONDS);
1121	>	shouldThrow();
1122	>	} catch (TimeoutException success) {
1123	>	} catch (Exception fail) {
1124	>	threadUnexpectedException(fail);
1125	>	} finally { future.cancel(true); }
1126	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
1127	>	}
1128	>
1129	>	/**
1130	>	* Fails with message "should throw exception".
1131	>	*/
1132		public void shouldThrow() {
1133		fail("Should throw exception");
1134		}
1135
1136		/**
1137	<	* fail with message "Unexpected exception"
1137	>	* Fails with message "should throw " + exceptionName.
1138		*/
1139	<	public void unexpectedException() {
1140	<	fail("Unexpected exception");
1139	>	public void shouldThrow(String exceptionName) {
1140	>	fail("Should throw " + exceptionName);
1141		}
1142
1143	+	/**
1144	+	* The maximum number of consecutive spurious wakeups we should
1145	+	* tolerate (from APIs like LockSupport.park) before failing a test.
1146	+	*/
1147	+	static final int MAX_SPURIOUS_WAKEUPS = 10;
1148
1149		/**
1150		* The number of elements to place in collections, arrays, etc.
1151		*/
1152	<	static final int SIZE = 20;
1152	>	public static final int SIZE = 20;
1153
1154		// Some convenient Integer constants
1155
1156	<	static final Integer zero = new Integer(0);
1157	<	static final Integer one = new Integer(1);
1158	<	static final Integer two = new Integer(2);
1159	<	static final Integer three  = new Integer(3);
1160	<	static final Integer four  = new Integer(4);
1161	<	static final Integer five  = new Integer(5);
1162	<	static final Integer six = new Integer(6);
1163	<	static final Integer seven = new Integer(7);
1164	<	static final Integer eight = new Integer(8);
1165	<	static final Integer nine = new Integer(9);
1166	<	static final Integer m1  = new Integer(-1);
1167	<	static final Integer m2  = new Integer(-2);
1168	<	static final Integer m3  = new Integer(-3);
1169	<	static final Integer m4 = new Integer(-4);
1170	<	static final Integer m5 = new Integer(-5);
1171	<	static final Integer m10 = new Integer(-10);
1156	>	public static final Integer zero  = new Integer(0);
1157	>	public static final Integer one   = new Integer(1);
1158	>	public static final Integer two   = new Integer(2);
1159	>	public static final Integer three = new Integer(3);
1160	>	public static final Integer four  = new Integer(4);
1161	>	public static final Integer five  = new Integer(5);
1162	>	public static final Integer six   = new Integer(6);
1163	>	public static final Integer seven = new Integer(7);
1164	>	public static final Integer eight = new Integer(8);
1165	>	public static final Integer nine  = new Integer(9);
1166	>	public static final Integer m1  = new Integer(-1);
1167	>	public static final Integer m2  = new Integer(-2);
1168	>	public static final Integer m3  = new Integer(-3);
1169	>	public static final Integer m4  = new Integer(-4);
1170	>	public static final Integer m5  = new Integer(-5);
1171	>	public static final Integer m6  = new Integer(-6);
1172	>	public static final Integer m10 = new Integer(-10);
1173	>
1174	>	/**
1175	>	* Runs Runnable r with a security policy that permits precisely
1176	>	* the specified permissions.  If there is no current security
1177	>	* manager, the runnable is run twice, both with and without a
1178	>	* security manager.  We require that any security manager permit
1179	>	* getPolicy/setPolicy.
1180	>	*/
1181	>	public void runWithPermissions(Runnable r, Permission... permissions) {
1182	>	SecurityManager sm = System.getSecurityManager();
1183	>	if (sm == null) {
1184	>	r.run();
1185	>	}
1186	>	runWithSecurityManagerWithPermissions(r, permissions);
1187	>	}
1188	>
1189	>	/**
1190	>	* Runs Runnable r with a security policy that permits precisely
1191	>	* the specified permissions.  If there is no current security
1192	>	* manager, a temporary one is set for the duration of the
1193	>	* Runnable.  We require that any security manager permit
1194	>	* getPolicy/setPolicy.
1195	>	*/
1196	>	public void runWithSecurityManagerWithPermissions(Runnable r,
1197	>	Permission... permissions) {
1198	>	SecurityManager sm = System.getSecurityManager();
1199	>	if (sm == null) {
1200	>	Policy savedPolicy = Policy.getPolicy();
1201	>	try {
1202	>	Policy.setPolicy(permissivePolicy());
1203	>	System.setSecurityManager(new SecurityManager());
1204	>	runWithSecurityManagerWithPermissions(r, permissions);
1205	>	} finally {
1206	>	System.setSecurityManager(null);
1207	>	Policy.setPolicy(savedPolicy);
1208	>	}
1209	>	} else {
1210	>	Policy savedPolicy = Policy.getPolicy();
1211	>	AdjustablePolicy policy = new AdjustablePolicy(permissions);
1212	>	Policy.setPolicy(policy);
1213	>
1214	>	try {
1215	>	r.run();
1216	>	} finally {
1217	>	policy.addPermission(new SecurityPermission("setPolicy"));
1218	>	Policy.setPolicy(savedPolicy);
1219	>	}
1220	>	}
1221	>	}
1222
1223	+	/**
1224	+	* Runs a runnable without any permissions.
1225	+	*/
1226	+	public void runWithoutPermissions(Runnable r) {
1227	+	runWithPermissions(r);
1228	+	}
1229
1230		/**
1231		* A security policy where new permissions can be dynamically added
1232		* or all cleared.
1233		*/
1234	<	static class AdjustablePolicy extends java.security.Policy {
1234	>	public static class AdjustablePolicy extends java.security.Policy {
1235		Permissions perms = new Permissions();
1236	<	AdjustablePolicy() { }
1236	>	AdjustablePolicy(Permission... permissions) {
1237	>	for (Permission permission : permissions)
1238	>	perms.add(permission);
1239	>	}
1240		void addPermission(Permission perm) { perms.add(perm); }
1241		void clearPermissions() { perms = new Permissions(); }
1242	<	public PermissionCollection getPermissions(CodeSource cs) {
1243	<	return perms;
1244	<	}
1245	<	public PermissionCollection getPermissions(ProtectionDomain pd) {
1246	<	return perms;
1247	<	}
1248	<	public boolean implies(ProtectionDomain pd, Permission p) {
1249	<	return perms.implies(p);
1250	<	}
1251	<	public void refresh() {}
1242	>	public PermissionCollection getPermissions(CodeSource cs) {
1243	>	return perms;
1244	>	}
1245	>	public PermissionCollection getPermissions(ProtectionDomain pd) {
1246	>	return perms;
1247	>	}
1248	>	public boolean implies(ProtectionDomain pd, Permission p) {
1249	>	return perms.implies(p);
1250	>	}
1251	>	public void refresh() {}
1252	>	public String toString() {
1253	>	List<Permission> ps = new ArrayList<>();
1254	>	for (Enumeration<Permission> e = perms.elements(); e.hasMoreElements();)
1255	>	ps.add(e.nextElement());
1256	>	return "AdjustablePolicy with permissions " + ps;
1257	>	}
1258		}
1259
1260	+	/**
1261	+	* Returns a policy containing all the permissions we ever need.
1262	+	*/
1263	+	public static Policy permissivePolicy() {
1264	+	return new AdjustablePolicy
1265	+	// Permissions j.u.c. needs directly
1266	+	(new RuntimePermission("modifyThread"),
1267	+	new RuntimePermission("getClassLoader"),
1268	+	new RuntimePermission("setContextClassLoader"),
1269	+	// Permissions needed to change permissions!
1270	+	new SecurityPermission("getPolicy"),
1271	+	new SecurityPermission("setPolicy"),
1272	+	new RuntimePermission("setSecurityManager"),
1273	+	// Permissions needed by the junit test harness
1274	+	new RuntimePermission("accessDeclaredMembers"),
1275	+	new PropertyPermission("*", "read"),
1276	+	new java.io.FilePermission("<<ALL FILES>>", "read"));
1277	+	}
1278
1279	<	// Some convenient Runnable classes
1279	>	/**
1280	>	* Sleeps until the given time has elapsed.
1281	>	* Throws AssertionError if interrupted.
1282	>	*/
1283	>	static void sleep(long millis) {
1284	>	try {
1285	>	delay(millis);
1286	>	} catch (InterruptedException fail) {
1287	>	throw new AssertionError("Unexpected InterruptedException", fail);
1288	>	}
1289	>	}
1290
1291	<	static class NoOpRunnable implements Runnable {
1292	<	public void run() {}
1291	>	/**
1292	>	* Spin-waits up to the specified number of milliseconds for the given
1293	>	* thread to enter a wait state: BLOCKED, WAITING, or TIMED_WAITING.
1294	>	*/
1295	>	void waitForThreadToEnterWaitState(Thread thread, long timeoutMillis) {
1296	>	long startTime = 0L;
1297	>	for (;;) {
1298	>	Thread.State s = thread.getState();
1299	>	if (s == Thread.State.BLOCKED ||
1300	>	s == Thread.State.WAITING ||
1301	>	s == Thread.State.TIMED_WAITING)
1302	>	return;
1303	>	else if (s == Thread.State.TERMINATED)
1304	>	fail("Unexpected thread termination");
1305	>	else if (startTime == 0L)
1306	>	startTime = System.nanoTime();
1307	>	else if (millisElapsedSince(startTime) > timeoutMillis) {
1308	>	threadAssertTrue(thread.isAlive());
1309	>	fail("timed out waiting for thread to enter wait state");
1310	>	}
1311	>	Thread.yield();
1312	>	}
1313		}
1314
1315	<	static class NoOpCallable implements Callable {
1316	<	public Object call() { return Boolean.TRUE; }
1315	>	/**
1316	>	* Spin-waits up to the specified number of milliseconds for the given
1317	>	* thread to enter a wait state: BLOCKED, WAITING, or TIMED_WAITING,
1318	>	* and additionally satisfy the given condition.
1319	>	*/
1320	>	void waitForThreadToEnterWaitState(
1321	>	Thread thread, long timeoutMillis, Callable<Boolean> waitingForGodot) {
1322	>	long startTime = 0L;
1323	>	for (;;) {
1324	>	Thread.State s = thread.getState();
1325	>	if (s == Thread.State.BLOCKED ||
1326	>	s == Thread.State.WAITING ||
1327	>	s == Thread.State.TIMED_WAITING) {
1328	>	try {
1329	>	if (waitingForGodot.call())
1330	>	return;
1331	>	} catch (Throwable fail) { threadUnexpectedException(fail); }
1332	>	}
1333	>	else if (s == Thread.State.TERMINATED)
1334	>	fail("Unexpected thread termination");
1335	>	else if (startTime == 0L)
1336	>	startTime = System.nanoTime();
1337	>	else if (millisElapsedSince(startTime) > timeoutMillis) {
1338	>	threadAssertTrue(thread.isAlive());
1339	>	fail("timed out waiting for thread to enter wait state");
1340	>	}
1341	>	Thread.yield();
1342	>	}
1343		}
1344
1345	<	static final String TEST_STRING = "a test string";
1345	>	/**
1346	>	* Spin-waits up to LONG_DELAY_MS milliseconds for the given thread to
1347	>	* enter a wait state: BLOCKED, WAITING, or TIMED_WAITING.
1348	>	*/
1349	>	void waitForThreadToEnterWaitState(Thread thread) {
1350	>	waitForThreadToEnterWaitState(thread, LONG_DELAY_MS);
1351	>	}
1352
1353	<	static class StringTask implements Callable<String> {
1354	<	public String call() { return TEST_STRING; }
1353	>	/**
1354	>	* Spin-waits up to LONG_DELAY_MS milliseconds for the given thread to
1355	>	* enter a wait state: BLOCKED, WAITING, or TIMED_WAITING,
1356	>	* and additionally satisfy the given condition.
1357	>	*/
1358	>	void waitForThreadToEnterWaitState(
1359	>	Thread thread, Callable<Boolean> waitingForGodot) {
1360	>	waitForThreadToEnterWaitState(thread, LONG_DELAY_MS, waitingForGodot);
1361		}
1362
1363	<	static class NPETask implements Callable<String> {
1364	<	public String call() { throw new NullPointerException(); }
1363	>	/**
1364	>	* Returns the number of milliseconds since time given by
1365	>	* startNanoTime, which must have been previously returned from a
1366	>	* call to {@link System#nanoTime()}.
1367	>	*/
1368	>	static long millisElapsedSince(long startNanoTime) {
1369	>	return NANOSECONDS.toMillis(System.nanoTime() - startNanoTime);
1370		}
1371
1372	<	static class CallableOne implements Callable<Integer> {
1373	<	public Integer call() { return one; }
1372	>	//     void assertTerminatesPromptly(long timeoutMillis, Runnable r) {
1373	>	//         long startTime = System.nanoTime();
1374	>	//         try {
1375	>	//             r.run();
1376	>	//         } catch (Throwable fail) { threadUnexpectedException(fail); }
1377	>	//         if (millisElapsedSince(startTime) > timeoutMillis/2)
1378	>	//             throw new AssertionError("did not return promptly");
1379	>	//     }
1380	>
1381	>	//     void assertTerminatesPromptly(Runnable r) {
1382	>	//         assertTerminatesPromptly(LONG_DELAY_MS/2, r);
1383	>	//     }
1384	>
1385	>	/**
1386	>	* Checks that timed f.get() returns the expected value, and does not
1387	>	* wait for the timeout to elapse before returning.
1388	>	*/
1389	>	<T> void checkTimedGet(Future<T> f, T expectedValue, long timeoutMillis) {
1390	>	long startTime = System.nanoTime();
1391	>	try {
1392	>	assertEquals(expectedValue, f.get(timeoutMillis, MILLISECONDS));
1393	>	} catch (Throwable fail) { threadUnexpectedException(fail); }
1394	>	if (millisElapsedSince(startTime) > timeoutMillis/2)
1395	>	throw new AssertionError("timed get did not return promptly");
1396		}
1397
1398	<	class ShortRunnable implements Runnable {
1399	<	public void run() {
1400	<	try {
1401	<	Thread.sleep(SHORT_DELAY_MS);
1402	<	}
1403	<	catch(Exception e) {
1404	<	threadUnexpectedException();
1398	>	<T> void checkTimedGet(Future<T> f, T expectedValue) {
1399	>	checkTimedGet(f, expectedValue, LONG_DELAY_MS);
1400	>	}
1401	>
1402	>	/**
1403	>	* Returns a new started daemon Thread running the given runnable.
1404	>	*/
1405	>	Thread newStartedThread(Runnable runnable) {
1406	>	Thread t = new Thread(runnable);
1407	>	t.setDaemon(true);
1408	>	t.start();
1409	>	return t;
1410	>	}
1411	>
1412	>	/**
1413	>	* Waits for the specified time (in milliseconds) for the thread
1414	>	* to terminate (using {@link Thread#join(long)}), else interrupts
1415	>	* the thread (in the hope that it may terminate later) and fails.
1416	>	*/
1417	>	void awaitTermination(Thread t, long timeoutMillis) {
1418	>	try {
1419	>	t.join(timeoutMillis);
1420	>	} catch (InterruptedException fail) {
1421	>	threadUnexpectedException(fail);
1422	>	} finally {
1423	>	if (t.getState() != Thread.State.TERMINATED) {
1424	>	t.interrupt();
1425	>	threadFail("timed out waiting for thread to terminate");
1426		}
1427		}
1428		}
1429
1430	<	class ShortInterruptedRunnable implements Runnable {
1431	<	public void run() {
1430	>	/**
1431	>	* Waits for LONG_DELAY_MS milliseconds for the thread to
1432	>	* terminate (using {@link Thread#join(long)}), else interrupts
1433	>	* the thread (in the hope that it may terminate later) and fails.
1434	>	*/
1435	>	void awaitTermination(Thread t) {
1436	>	awaitTermination(t, LONG_DELAY_MS);
1437	>	}
1438	>
1439	>	// Some convenient Runnable classes
1440	>
1441	>	public abstract class CheckedRunnable implements Runnable {
1442	>	protected abstract void realRun() throws Throwable;
1443	>
1444	>	public final void run() {
1445		try {
1446	<	Thread.sleep(SHORT_DELAY_MS);
1447	<	threadShouldThrow();
1448	<	}
410	<	catch(InterruptedException success) {
1446	>	realRun();
1447	>	} catch (Throwable fail) {
1448	>	threadUnexpectedException(fail);
1449		}
1450		}
1451		}
1452
1453	<	class SmallRunnable implements Runnable {
1454	<	public void run() {
1453	>	public abstract class ThreadShouldThrow extends Thread {
1454	>	protected abstract void realRun() throws Throwable;
1455	>
1456	>	final Class<?> exceptionClass;
1457	>
1458	>	<T extends Throwable> ThreadShouldThrow(Class<T> exceptionClass) {
1459	>	this.exceptionClass = exceptionClass;
1460	>	}
1461	>
1462	>	public final void run() {
1463		try {
1464	<	Thread.sleep(SMALL_DELAY_MS);
1465	<	}
1466	<	catch(Exception e) {
1467	<	threadUnexpectedException();
1464	>	realRun();
1465	>	threadShouldThrow(exceptionClass.getSimpleName());
1466	>	} catch (Throwable t) {
1467	>	if (! exceptionClass.isInstance(t))
1468	>	threadUnexpectedException(t);
1469		}
1470		}
1471		}
1472
1473	<	class SmallPossiblyInterruptedRunnable implements Runnable {
1474	<	public void run() {
1473	>	public abstract class CheckedInterruptedRunnable implements Runnable {
1474	>	protected abstract void realRun() throws Throwable;
1475	>
1476	>	public final void run() {
1477		try {
1478	<	Thread.sleep(SMALL_DELAY_MS);
1479	<	}
1480	<	catch(Exception e) {
1478	>	realRun();
1479	>	threadShouldThrow("InterruptedException");
1480	>	} catch (InterruptedException success) {
1481	>	threadAssertFalse(Thread.interrupted());
1482	>	} catch (Throwable fail) {
1483	>	threadUnexpectedException(fail);
1484		}
1485		}
1486		}
1487
1488	<	class SmallCallable implements Callable {
1489	<	public Object call() {
1488	>	public abstract class CheckedCallable<T> implements Callable<T> {
1489	>	protected abstract T realCall() throws Throwable;
1490	>
1491	>	public final T call() {
1492		try {
1493	<	Thread.sleep(SMALL_DELAY_MS);
1493	>	return realCall();
1494	>	} catch (Throwable fail) {
1495	>	threadUnexpectedException(fail);
1496	>	return null;
1497		}
441	–	catch(Exception e) {
442	–	threadUnexpectedException();
443	–	}
444	–	return Boolean.TRUE;
1498		}
1499		}
1500
1501	<	class SmallInterruptedRunnable implements Runnable {
1502	<	public void run() {
1501	>	public abstract class CheckedInterruptedCallable<T>
1502	>	implements Callable<T> {
1503	>	protected abstract T realCall() throws Throwable;
1504	>
1505	>	public final T call() {
1506		try {
1507	<	Thread.sleep(SMALL_DELAY_MS);
1508	<	threadShouldThrow();
1509	<	}
1510	<	catch(InterruptedException success) {
1507	>	T result = realCall();
1508	>	threadShouldThrow("InterruptedException");
1509	>	return result;
1510	>	} catch (InterruptedException success) {
1511	>	threadAssertFalse(Thread.interrupted());
1512	>	} catch (Throwable fail) {
1513	>	threadUnexpectedException(fail);
1514		}
1515	+	return null;
1516		}
1517		}
1518
1519	+	public static class NoOpRunnable implements Runnable {
1520	+	public void run() {}
1521	+	}
1522
1523	<	class MediumRunnable implements Runnable {
1524	<	public void run() {
1525	<	try {
1526	<	Thread.sleep(MEDIUM_DELAY_MS);
1527	<	}
1528	<	catch(Exception e) {
1529	<	threadUnexpectedException();
1530	<	}
1523	>	public static class NoOpCallable implements Callable {
1524	>	public Object call() { return Boolean.TRUE; }
1525	>	}
1526	>
1527	>	public static final String TEST_STRING = "a test string";
1528	>
1529	>	public static class StringTask implements Callable<String> {
1530	>	final String value;
1531	>	public StringTask() { this(TEST_STRING); }
1532	>	public StringTask(String value) { this.value = value; }
1533	>	public String call() { return value; }
1534	>	}
1535	>
1536	>	public Callable<String> latchAwaitingStringTask(final CountDownLatch latch) {
1537	>	return new CheckedCallable<String>() {
1538	>	protected String realCall() {
1539	>	try {
1540	>	latch.await();
1541	>	} catch (InterruptedException quittingTime) {}
1542	>	return TEST_STRING;
1543	>	}};
1544	>	}
1545	>
1546	>	public Runnable countDowner(final CountDownLatch latch) {
1547	>	return new CheckedRunnable() {
1548	>	public void realRun() throws InterruptedException {
1549	>	latch.countDown();
1550	>	}};
1551	>	}
1552	>
1553	>	class LatchAwaiter extends CheckedRunnable {
1554	>	static final int NEW = 0;
1555	>	static final int RUNNING = 1;
1556	>	static final int DONE = 2;
1557	>	final CountDownLatch latch;
1558	>	int state = NEW;
1559	>	LatchAwaiter(CountDownLatch latch) { this.latch = latch; }
1560	>	public void realRun() throws InterruptedException {
1561	>	state = 1;
1562	>	await(latch);
1563	>	state = 2;
1564		}
1565		}
1566
1567	<	class MediumInterruptedRunnable implements Runnable {
1568	<	public void run() {
1569	<	try {
1570	<	Thread.sleep(MEDIUM_DELAY_MS);
1571	<	threadShouldThrow();
1572	<	}
1573	<	catch(InterruptedException success) {
1574	<	}
1567	>	public LatchAwaiter awaiter(CountDownLatch latch) {
1568	>	return new LatchAwaiter(latch);
1569	>	}
1570	>
1571	>	public void await(CountDownLatch latch, long timeoutMillis) {
1572	>	try {
1573	>	if (!latch.await(timeoutMillis, MILLISECONDS))
1574	>	fail("timed out waiting for CountDownLatch for "
1575	>	+ (timeoutMillis/1000) + " sec");
1576	>	} catch (Throwable fail) {
1577	>	threadUnexpectedException(fail);
1578		}
1579		}
1580
1581	<	class MediumPossiblyInterruptedRunnable implements Runnable {
1582	<	public void run() {
1583	<	try {
1584	<	Thread.sleep(MEDIUM_DELAY_MS);
1585	<	}
1586	<	catch(InterruptedException success) {
1587	<	}
1581	>	public void await(CountDownLatch latch) {
1582	>	await(latch, LONG_DELAY_MS);
1583	>	}
1584	>
1585	>	public void await(Semaphore semaphore) {
1586	>	try {
1587	>	if (!semaphore.tryAcquire(LONG_DELAY_MS, MILLISECONDS))
1588	>	fail("timed out waiting for Semaphore for "
1589	>	+ (LONG_DELAY_MS/1000) + " sec");
1590	>	} catch (Throwable fail) {
1591	>	threadUnexpectedException(fail);
1592		}
1593		}
1594
1595	<	class LongPossiblyInterruptedRunnable implements Runnable {
1596	<	public void run() {
1595	>	public void await(CyclicBarrier barrier) {
1596	>	try {
1597	>	barrier.await(LONG_DELAY_MS, MILLISECONDS);
1598	>	} catch (Throwable fail) {
1599	>	threadUnexpectedException(fail);
1600	>	}
1601	>	}
1602	>
1603	>	//     /**
1604	>	//      * Spin-waits up to LONG_DELAY_MS until flag becomes true.
1605	>	//      */
1606	>	//     public void await(AtomicBoolean flag) {
1607	>	//         await(flag, LONG_DELAY_MS);
1608	>	//     }
1609	>
1610	>	//     /**
1611	>	//      * Spin-waits up to the specified timeout until flag becomes true.
1612	>	//      */
1613	>	//     public void await(AtomicBoolean flag, long timeoutMillis) {
1614	>	//         long startTime = System.nanoTime();
1615	>	//         while (!flag.get()) {
1616	>	//             if (millisElapsedSince(startTime) > timeoutMillis)
1617	>	//                 throw new AssertionError("timed out");
1618	>	//             Thread.yield();
1619	>	//         }
1620	>	//     }
1621	>
1622	>	public static class NPETask implements Callable<String> {
1623	>	public String call() { throw new NullPointerException(); }
1624	>	}
1625	>
1626	>	public class SmallPossiblyInterruptedRunnable extends CheckedRunnable {
1627	>	protected void realRun() {
1628		try {
1629	<	Thread.sleep(LONG_DELAY_MS);
1630	<	}
497	<	catch(InterruptedException success) {
498	<	}
1629	>	delay(SMALL_DELAY_MS);
1630	>	} catch (InterruptedException ok) {}
1631		}
1632		}
1633
1634	+	public Runnable possiblyInterruptedRunnable(final long timeoutMillis) {
1635	+	return new CheckedRunnable() {
1636	+	protected void realRun() {
1637	+	try {
1638	+	delay(timeoutMillis);
1639	+	} catch (InterruptedException ok) {}
1640	+	}};
1641	+	}
1642	+
1643		/**
1644		* For use as ThreadFactory in constructors
1645		*/
1646	<	static class SimpleThreadFactory implements ThreadFactory{
1647	<	public Thread newThread(Runnable r){
1646	>	public static class SimpleThreadFactory implements ThreadFactory {
1647	>	public Thread newThread(Runnable r) {
1648		return new Thread(r);
1649	<	}
1649	>	}
1650		}
1651
1652	<	static class TrackedShortRunnable implements Runnable {
1653	<	volatile boolean done = false;
1652	>	public interface TrackedRunnable extends Runnable {
1653	>	boolean isDone();
1654	>	}
1655	>
1656	>	public static class TrackedNoOpRunnable implements Runnable {
1657	>	public volatile boolean done = false;
1658		public void run() {
1659	+	done = true;
1660	+	}
1661	+	}
1662	+
1663	+	/**
1664	+	* Analog of CheckedRunnable for RecursiveAction
1665	+	*/
1666	+	public abstract class CheckedRecursiveAction extends RecursiveAction {
1667	+	protected abstract void realCompute() throws Throwable;
1668	+
1669	+	@Override protected final void compute() {
1670		try {
1671	<	Thread.sleep(SMALL_DELAY_MS);
1672	<	done = true;
1673	<	} catch(Exception e){
1671	>	realCompute();
1672	>	} catch (Throwable fail) {
1673	>	threadUnexpectedException(fail);
1674		}
1675		}
1676		}
1677
1678	<	static class TrackedMediumRunnable implements Runnable {
1679	<	volatile boolean done = false;
1680	<	public void run() {
1678	>	/**
1679	>	* Analog of CheckedCallable for RecursiveTask
1680	>	*/
1681	>	public abstract class CheckedRecursiveTask<T> extends RecursiveTask<T> {
1682	>	protected abstract T realCompute() throws Throwable;
1683	>
1684	>	@Override protected final T compute() {
1685		try {
1686	<	Thread.sleep(MEDIUM_DELAY_MS);
1687	<	done = true;
1688	<	} catch(Exception e){
1686	>	return realCompute();
1687	>	} catch (Throwable fail) {
1688	>	threadUnexpectedException(fail);
1689	>	return null;
1690		}
1691		}
1692		}
1693
1694	<	static class TrackedLongRunnable implements Runnable {
1695	<	volatile boolean done = false;
1696	<	public void run() {
1694	>	/**
1695	>	* For use as RejectedExecutionHandler in constructors
1696	>	*/
1697	>	public static class NoOpREHandler implements RejectedExecutionHandler {
1698	>	public void rejectedExecution(Runnable r,
1699	>	ThreadPoolExecutor executor) {}
1700	>	}
1701	>
1702	>	/**
1703	>	* A CyclicBarrier that uses timed await and fails with
1704	>	* AssertionErrors instead of throwing checked exceptions.
1705	>	*/
1706	>	public static class CheckedBarrier extends CyclicBarrier {
1707	>	public CheckedBarrier(int parties) { super(parties); }
1708	>
1709	>	public int await() {
1710		try {
1711	<	Thread.sleep(LONG_DELAY_MS);
1712	<	done = true;
1713	<	} catch(Exception e){
1711	>	return super.await(2 * LONG_DELAY_MS, MILLISECONDS);
1712	>	} catch (TimeoutException timedOut) {
1713	>	throw new AssertionError("timed out");
1714	>	} catch (Exception fail) {
1715	>	throw new AssertionError("Unexpected exception: " + fail, fail);
1716		}
1717		}
1718		}
1719
1720	<	static class TrackedNoOpRunnable implements Runnable {
1721	<	volatile boolean done = false;
1722	<	public void run() {
1723	<	done = true;
1720	>	void checkEmpty(BlockingQueue q) {
1721	>	try {
1722	>	assertTrue(q.isEmpty());
1723	>	assertEquals(0, q.size());
1724	>	assertNull(q.peek());
1725	>	assertNull(q.poll());
1726	>	assertNull(q.poll(randomExpiredTimeout(), randomTimeUnit()));
1727	>	assertEquals(q.toString(), "[]");
1728	>	assertTrue(Arrays.equals(q.toArray(), new Object[0]));
1729	>	assertFalse(q.iterator().hasNext());
1730	>	try {
1731	>	q.element();
1732	>	shouldThrow();
1733	>	} catch (NoSuchElementException success) {}
1734	>	try {
1735	>	q.iterator().next();
1736	>	shouldThrow();
1737	>	} catch (NoSuchElementException success) {}
1738	>	try {
1739	>	q.remove();
1740	>	shouldThrow();
1741	>	} catch (NoSuchElementException success) {}
1742	>	} catch (InterruptedException fail) { threadUnexpectedException(fail); }
1743	>	}
1744	>
1745	>	void assertSerialEquals(Object x, Object y) {
1746	>	assertTrue(Arrays.equals(serialBytes(x), serialBytes(y)));
1747	>	}
1748	>
1749	>	void assertNotSerialEquals(Object x, Object y) {
1750	>	assertFalse(Arrays.equals(serialBytes(x), serialBytes(y)));
1751	>	}
1752	>
1753	>	byte[] serialBytes(Object o) {
1754	>	try {
1755	>	ByteArrayOutputStream bos = new ByteArrayOutputStream();
1756	>	ObjectOutputStream oos = new ObjectOutputStream(bos);
1757	>	oos.writeObject(o);
1758	>	oos.flush();
1759	>	oos.close();
1760	>	return bos.toByteArray();
1761	>	} catch (Throwable fail) {
1762	>	threadUnexpectedException(fail);
1763	>	return new byte[0];
1764	>	}
1765	>	}
1766	>
1767	>	void assertImmutable(final Object o) {
1768	>	if (o instanceof Collection) {
1769	>	assertThrows(
1770	>	UnsupportedOperationException.class,
1771	>	new Runnable() { public void run() {
1772	>	((Collection) o).add(null);}});
1773	>	}
1774	>	}
1775	>
1776	>	@SuppressWarnings("unchecked")
1777	>	<T> T serialClone(T o) {
1778	>	try {
1779	>	ObjectInputStream ois = new ObjectInputStream
1780	>	(new ByteArrayInputStream(serialBytes(o)));
1781	>	T clone = (T) ois.readObject();
1782	>	if (o == clone) assertImmutable(o);
1783	>	assertSame(o.getClass(), clone.getClass());
1784	>	return clone;
1785	>	} catch (Throwable fail) {
1786	>	threadUnexpectedException(fail);
1787	>	return null;
1788		}
1789		}
1790
1791	<	static class TrackedCallable implements Callable {
1792	<	volatile boolean done = false;
1793	<	public Object call() {
1794	<	try {
1795	<	Thread.sleep(SMALL_DELAY_MS);
1796	<	done = true;
1797	<	} catch(Exception e){
1791	>	/**
1792	>	* A version of serialClone that leaves error handling (for
1793	>	* e.g. NotSerializableException) up to the caller.
1794	>	*/
1795	>	@SuppressWarnings("unchecked")
1796	>	<T> T serialClonePossiblyFailing(T o)
1797	>	throws ReflectiveOperationException, java.io.IOException {
1798	>	ByteArrayOutputStream bos = new ByteArrayOutputStream();
1799	>	ObjectOutputStream oos = new ObjectOutputStream(bos);
1800	>	oos.writeObject(o);
1801	>	oos.flush();
1802	>	oos.close();
1803	>	ObjectInputStream ois = new ObjectInputStream
1804	>	(new ByteArrayInputStream(bos.toByteArray()));
1805	>	T clone = (T) ois.readObject();
1806	>	if (o == clone) assertImmutable(o);
1807	>	assertSame(o.getClass(), clone.getClass());
1808	>	return clone;
1809	>	}
1810	>
1811	>	/**
1812	>	* If o implements Cloneable and has a public clone method,
1813	>	* returns a clone of o, else null.
1814	>	*/
1815	>	@SuppressWarnings("unchecked")
1816	>	<T> T cloneableClone(T o) {
1817	>	if (!(o instanceof Cloneable)) return null;
1818	>	final T clone;
1819	>	try {
1820	>	clone = (T) o.getClass().getMethod("clone").invoke(o);
1821	>	} catch (NoSuchMethodException ok) {
1822	>	return null;
1823	>	} catch (ReflectiveOperationException unexpected) {
1824	>	throw new Error(unexpected);
1825	>	}
1826	>	assertNotSame(o, clone); // not 100% guaranteed by spec
1827	>	assertSame(o.getClass(), clone.getClass());
1828	>	return clone;
1829	>	}
1830	>
1831	>	public void assertThrows(Class<? extends Throwable> expectedExceptionClass,
1832	>	Runnable... throwingActions) {
1833	>	for (Runnable throwingAction : throwingActions) {
1834	>	boolean threw = false;
1835	>	try { throwingAction.run(); }
1836	>	catch (Throwable t) {
1837	>	threw = true;
1838	>	if (!expectedExceptionClass.isInstance(t))
1839	>	throw new AssertionError(
1840	>	"Expected " + expectedExceptionClass.getName() +
1841	>	", got " + t.getClass().getName(),
1842	>	t);
1843		}
1844	<	return Boolean.TRUE;
1844	>	if (!threw)
1845	>	shouldThrow(expectedExceptionClass.getName());
1846		}
1847		}
1848
1849	+	public void assertIteratorExhausted(Iterator<?> it) {
1850	+	try {
1851	+	it.next();
1852	+	shouldThrow();
1853	+	} catch (NoSuchElementException success) {}
1854	+	assertFalse(it.hasNext());
1855	+	}
1856	+
1857	+	public <T> Callable<T> callableThrowing(final Exception ex) {
1858	+	return new Callable<T>() { public T call() throws Exception { throw ex; }};
1859	+	}
1860	+
1861	+	public Runnable runnableThrowing(final RuntimeException ex) {
1862	+	return new Runnable() { public void run() { throw ex; }};
1863	+	}
1864	+
1865	+	/** A reusable thread pool to be shared by tests. */
1866	+	static final ExecutorService cachedThreadPool =
1867	+	new ThreadPoolExecutor(0, Integer.MAX_VALUE,
1868	+	1000L, MILLISECONDS,
1869	+	new SynchronousQueue<Runnable>());
1870	+
1871	+	static <T> void shuffle(T[] array) {
1872	+	Collections.shuffle(Arrays.asList(array), ThreadLocalRandom.current());
1873	+	}
1874
1875		/**
1876	<	* For use as RejectedExecutionHandler in constructors
1876	>	* Returns the same String as would be returned by {@link
1877	>	* Object#toString}, whether or not the given object's class
1878	>	* overrides toString().
1879	>	*
1880	>	* @see System#identityHashCode
1881		*/
1882	<	static class NoOpREHandler implements RejectedExecutionHandler{
1883	<	public void rejectedExecution(Runnable r, ThreadPoolExecutor executor){}
1882	>	static String identityString(Object x) {
1883	>	return x.getClass().getName()
1884	>	+ "@" + Integer.toHexString(System.identityHashCode(x));
1885	>	}
1886	>
1887	>	// --- Shared assertions for Executor tests ---
1888	>
1889	>	/**
1890	>	* Returns maximum number of tasks that can be submitted to given
1891	>	* pool (with bounded queue) before saturation (when submission
1892	>	* throws RejectedExecutionException).
1893	>	*/
1894	>	static final int saturatedSize(ThreadPoolExecutor pool) {
1895	>	BlockingQueue<Runnable> q = pool.getQueue();
1896	>	return pool.getMaximumPoolSize() + q.size() + q.remainingCapacity();
1897	>	}
1898	>
1899	>	@SuppressWarnings("FutureReturnValueIgnored")
1900	>	void assertNullTaskSubmissionThrowsNullPointerException(Executor e) {
1901	>	try {
1902	>	e.execute((Runnable) null);
1903	>	shouldThrow();
1904	>	} catch (NullPointerException success) {}
1905	>
1906	>	if (! (e instanceof ExecutorService)) return;
1907	>	ExecutorService es = (ExecutorService) e;
1908	>	try {
1909	>	es.submit((Runnable) null);
1910	>	shouldThrow();
1911	>	} catch (NullPointerException success) {}
1912	>	try {
1913	>	es.submit((Runnable) null, Boolean.TRUE);
1914	>	shouldThrow();
1915	>	} catch (NullPointerException success) {}
1916	>	try {
1917	>	es.submit((Callable) null);
1918	>	shouldThrow();
1919	>	} catch (NullPointerException success) {}
1920	>
1921	>	if (! (e instanceof ScheduledExecutorService)) return;
1922	>	ScheduledExecutorService ses = (ScheduledExecutorService) e;
1923	>	try {
1924	>	ses.schedule((Runnable) null,
1925	>	randomTimeout(), randomTimeUnit());
1926	>	shouldThrow();
1927	>	} catch (NullPointerException success) {}
1928	>	try {
1929	>	ses.schedule((Callable) null,
1930	>	randomTimeout(), randomTimeUnit());
1931	>	shouldThrow();
1932	>	} catch (NullPointerException success) {}
1933	>	try {
1934	>	ses.scheduleAtFixedRate((Runnable) null,
1935	>	randomTimeout(), LONG_DELAY_MS, MILLISECONDS);
1936	>	shouldThrow();
1937	>	} catch (NullPointerException success) {}
1938	>	try {
1939	>	ses.scheduleWithFixedDelay((Runnable) null,
1940	>	randomTimeout(), LONG_DELAY_MS, MILLISECONDS);
1941	>	shouldThrow();
1942	>	} catch (NullPointerException success) {}
1943	>	}
1944	>
1945	>	void setRejectedExecutionHandler(
1946	>	ThreadPoolExecutor p, RejectedExecutionHandler handler) {
1947	>	p.setRejectedExecutionHandler(handler);
1948	>	assertSame(handler, p.getRejectedExecutionHandler());
1949	>	}
1950	>
1951	>	void assertTaskSubmissionsAreRejected(ThreadPoolExecutor p) {
1952	>	final RejectedExecutionHandler savedHandler = p.getRejectedExecutionHandler();
1953	>	final long savedTaskCount = p.getTaskCount();
1954	>	final long savedCompletedTaskCount = p.getCompletedTaskCount();
1955	>	final int savedQueueSize = p.getQueue().size();
1956	>	final boolean stock = (p.getClass().getClassLoader() == null);
1957	>
1958	>	Runnable r = () -> {};
1959	>	Callable<Boolean> c = () -> Boolean.TRUE;
1960	>
1961	>	class Recorder implements RejectedExecutionHandler {
1962	>	public volatile Runnable r = null;
1963	>	public volatile ThreadPoolExecutor p = null;
1964	>	public void reset() { r = null; p = null; }
1965	>	public void rejectedExecution(Runnable r, ThreadPoolExecutor p) {
1966	>	assertNull(this.r);
1967	>	assertNull(this.p);
1968	>	this.r = r;
1969	>	this.p = p;
1970	>	}
1971	>	}
1972	>
1973	>	// check custom handler is invoked exactly once per task
1974	>	Recorder recorder = new Recorder();
1975	>	setRejectedExecutionHandler(p, recorder);
1976	>	for (int i = 2; i--> 0; ) {
1977	>	recorder.reset();
1978	>	p.execute(r);
1979	>	if (stock && p.getClass() == ThreadPoolExecutor.class)
1980	>	assertSame(r, recorder.r);
1981	>	assertSame(p, recorder.p);
1982	>
1983	>	recorder.reset();
1984	>	assertFalse(p.submit(r).isDone());
1985	>	if (stock) assertTrue(!((FutureTask) recorder.r).isDone());
1986	>	assertSame(p, recorder.p);
1987	>
1988	>	recorder.reset();
1989	>	assertFalse(p.submit(r, Boolean.TRUE).isDone());
1990	>	if (stock) assertTrue(!((FutureTask) recorder.r).isDone());
1991	>	assertSame(p, recorder.p);
1992	>
1993	>	recorder.reset();
1994	>	assertFalse(p.submit(c).isDone());
1995	>	if (stock) assertTrue(!((FutureTask) recorder.r).isDone());
1996	>	assertSame(p, recorder.p);
1997	>
1998	>	if (p instanceof ScheduledExecutorService) {
1999	>	ScheduledExecutorService s = (ScheduledExecutorService) p;
2000	>	ScheduledFuture<?> future;
2001	>
2002	>	recorder.reset();
2003	>	future = s.schedule(r, randomTimeout(), randomTimeUnit());
2004	>	assertFalse(future.isDone());
2005	>	if (stock) assertTrue(!((FutureTask) recorder.r).isDone());
2006	>	assertSame(p, recorder.p);
2007	>
2008	>	recorder.reset();
2009	>	future = s.schedule(c, randomTimeout(), randomTimeUnit());
2010	>	assertFalse(future.isDone());
2011	>	if (stock) assertTrue(!((FutureTask) recorder.r).isDone());
2012	>	assertSame(p, recorder.p);
2013	>
2014	>	recorder.reset();
2015	>	future = s.scheduleAtFixedRate(r, randomTimeout(), LONG_DELAY_MS, MILLISECONDS);
2016	>	assertFalse(future.isDone());
2017	>	if (stock) assertTrue(!((FutureTask) recorder.r).isDone());
2018	>	assertSame(p, recorder.p);
2019	>
2020	>	recorder.reset();
2021	>	future = s.scheduleWithFixedDelay(r, randomTimeout(), LONG_DELAY_MS, MILLISECONDS);
2022	>	assertFalse(future.isDone());
2023	>	if (stock) assertTrue(!((FutureTask) recorder.r).isDone());
2024	>	assertSame(p, recorder.p);
2025	>	}
2026	>	}
2027	>
2028	>	// Checking our custom handler above should be sufficient, but
2029	>	// we add some integration tests of standard handlers.
2030	>	final AtomicReference<Thread> thread = new AtomicReference<>();
2031	>	final Runnable setThread = () -> thread.set(Thread.currentThread());
2032	>
2033	>	setRejectedExecutionHandler(p, new ThreadPoolExecutor.AbortPolicy());
2034	>	try {
2035	>	p.execute(setThread);
2036	>	shouldThrow();
2037	>	} catch (RejectedExecutionException success) {}
2038	>	assertNull(thread.get());
2039	>
2040	>	setRejectedExecutionHandler(p, new ThreadPoolExecutor.DiscardPolicy());
2041	>	p.execute(setThread);
2042	>	assertNull(thread.get());
2043	>
2044	>	setRejectedExecutionHandler(p, new ThreadPoolExecutor.CallerRunsPolicy());
2045	>	p.execute(setThread);
2046	>	if (p.isShutdown())
2047	>	assertNull(thread.get());
2048	>	else
2049	>	assertSame(Thread.currentThread(), thread.get());
2050	>
2051	>	setRejectedExecutionHandler(p, savedHandler);
2052	>
2053	>	// check that pool was not perturbed by handlers
2054	>	assertEquals(savedTaskCount, p.getTaskCount());
2055	>	assertEquals(savedCompletedTaskCount, p.getCompletedTaskCount());
2056	>	assertEquals(savedQueueSize, p.getQueue().size());
2057	>	}
2058	>
2059	>	void assertCollectionsEquals(Collection<?> x, Collection<?> y) {
2060	>	assertEquals(x, y);
2061	>	assertEquals(y, x);
2062	>	assertEquals(x.isEmpty(), y.isEmpty());
2063	>	assertEquals(x.size(), y.size());
2064	>	if (x instanceof List) {
2065	>	assertEquals(x.toString(), y.toString());
2066	>	}
2067	>	if (x instanceof List || x instanceof Set) {
2068	>	assertEquals(x.hashCode(), y.hashCode());
2069	>	}
2070	>	if (x instanceof List || x instanceof Deque) {
2071	>	assertTrue(Arrays.equals(x.toArray(), y.toArray()));
2072	>	assertTrue(Arrays.equals(x.toArray(new Object[0]),
2073	>	y.toArray(new Object[0])));
2074	>	}
2075	>	}
2076	>
2077	>	/**
2078	>	* A weaker form of assertCollectionsEquals which does not insist
2079	>	* that the two collections satisfy Object#equals(Object), since
2080	>	* they may use identity semantics as Deques do.
2081	>	*/
2082	>	void assertCollectionsEquivalent(Collection<?> x, Collection<?> y) {
2083	>	if (x instanceof List || x instanceof Set)
2084	>	assertCollectionsEquals(x, y);
2085	>	else {
2086	>	assertEquals(x.isEmpty(), y.isEmpty());
2087	>	assertEquals(x.size(), y.size());
2088	>	assertEquals(new HashSet(x), new HashSet(y));
2089	>	if (x instanceof Deque) {
2090	>	assertTrue(Arrays.equals(x.toArray(), y.toArray()));
2091	>	assertTrue(Arrays.equals(x.toArray(new Object[0]),
2092	>	y.toArray(new Object[0])));
2093	>	}
2094	>	}
2095		}
570	–
571	–
2096		}

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