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Comparing jsr166/src/test/tck/JSR166TestCase.java (file contents):
Revision 1.24 by dl, Thu Jan 20 00:39:13 2005 UTC vs.
Revision 1.268 by jsr166, Sun Sep 22 01:59:57 2019 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.LockInfo;
53	>	import java.lang.management.ThreadInfo;
54	>	import java.lang.management.ThreadMXBean;
55	>	import java.lang.reflect.Constructor;
56	>	import java.lang.reflect.Method;
57	>	import java.lang.reflect.Modifier;
58	>	import java.security.CodeSource;
59	>	import java.security.Permission;
60	>	import java.security.PermissionCollection;
61	>	import java.security.Permissions;
62	>	import java.security.Policy;
63	>	import java.security.ProtectionDomain;
64	>	import java.security.SecurityPermission;
65	>	import java.util.ArrayList;
66	>	import java.util.Arrays;
67	>	import java.util.Collection;
68	>	import java.util.Collections;
69	>	import java.util.Date;
70	>	import java.util.Deque;
71	>	import java.util.Enumeration;
72	>	import java.util.HashSet;
73	>	import java.util.Iterator;
74	>	import java.util.List;
75	>	import java.util.NoSuchElementException;
76	>	import java.util.PropertyPermission;
77	>	import java.util.Set;
78	>	import java.util.concurrent.BlockingQueue;
79	>	import java.util.concurrent.Callable;
80	>	import java.util.concurrent.CountDownLatch;
81	>	import java.util.concurrent.CyclicBarrier;
82	>	import java.util.concurrent.ExecutionException;
83	>	import java.util.concurrent.Executor;
84	>	import java.util.concurrent.Executors;
85	>	import java.util.concurrent.ExecutorService;
86	>	import java.util.concurrent.ForkJoinPool;
87	>	import java.util.concurrent.Future;
88	>	import java.util.concurrent.FutureTask;
89	>	import java.util.concurrent.RecursiveAction;
90	>	import java.util.concurrent.RecursiveTask;
91	>	import java.util.concurrent.RejectedExecutionException;
92	>	import java.util.concurrent.RejectedExecutionHandler;
93	>	import java.util.concurrent.Semaphore;
94	>	import java.util.concurrent.ScheduledExecutorService;
95	>	import java.util.concurrent.ScheduledFuture;
96	>	import java.util.concurrent.SynchronousQueue;
97	>	import java.util.concurrent.ThreadFactory;
98	>	import java.util.concurrent.ThreadLocalRandom;
99	>	import java.util.concurrent.ThreadPoolExecutor;
100	>	import java.util.concurrent.TimeUnit;
101	>	import java.util.concurrent.TimeoutException;
102	>	import java.util.concurrent.atomic.AtomicBoolean;
103	>	import java.util.concurrent.atomic.AtomicReference;
104	>	import java.util.regex.Pattern;
105	>
106	>	import junit.framework.Test;
107	>	import junit.framework.TestCase;
108	>	import junit.framework.TestResult;
109	>	import junit.framework.TestSuite;
110
111		/**
112		* Base class for JSR166 Junit TCK tests.  Defines some constants,
113		* utility methods and classes, as well as a simple framework for
114		* helping to make sure that assertions failing in generated threads
115		* cause the associated test that generated them to itself fail (which
116	<	* JUnit doe not otherwise arrange).  The rules for creating such
116	>	* JUnit does not otherwise arrange).  The rules for creating such
117		* tests are:
118		*
119		* <ol>
120		*
121	<	* <li> All assertions in code running in generated threads must use
122	<	* the forms {@link #threadFail} , {@link #threadAssertTrue} {@link
123	<	* #threadAssertEquals}, or {@link #threadAssertNull}, (not
124	<	* <tt>fail</tt>, <tt>assertTrue</tt>, etc.) It is OK (but not
125	<	* particularly recommended) for other code to use these forms too.
126	<	* Only the most typically used JUnit assertion methods are defined
127	<	* this way, but enough to live with.</li>
121	>	* <li>All code not running in the main test thread (manually spawned threads
122	>	* or the common fork join pool) must be checked for failure (and completion!).
123	>	* Mechanisms that can be used to ensure this are:
124	>	*   <ol>
125	>	*   <li>Signalling via a synchronizer like AtomicInteger or CountDownLatch
126	>	*    that the task completed normally, which is checked before returning from
127	>	*    the test method in the main thread.
128	>	*   <li>Using the forms {@link #threadFail}, {@link #threadAssertTrue},
129	>	*    or {@link #threadAssertNull}, (not {@code fail}, {@code assertTrue}, etc.)
130	>	*    Only the most typically used JUnit assertion methods are defined
131	>	*    this way, but enough to live with.
132	>	*   <li>Recording failure explicitly using {@link #threadUnexpectedException}
133	>	*    or {@link #threadRecordFailure}.
134	>	*   <li>Using a wrapper like CheckedRunnable that uses one the mechanisms above.
135	>	*   </ol>
136		*
137	<	* <li> If you override {@link #setUp} or {@link #tearDown}, make sure
138	<	* to invoke <tt>super.setUp</tt> and <tt>super.tearDown</tt> within
137	>	* <li>If you override {@link #setUp} or {@link #tearDown}, make sure
138	>	* to invoke {@code super.setUp} and {@code super.tearDown} within
139		* them. These methods are used to clear and check for thread
140	<	* assertion failures.</li>
140	>	* assertion failures.
141		*
142	<	* <li>All delays and timeouts must use one of the constants <tt>
143	<	* SHORT_DELAY_MS</tt>, <tt> SMALL_DELAY_MS</tt>, <tt> MEDIUM_DELAY_MS</tt>,
144	<	* <tt> LONG_DELAY_MS</tt>. The idea here is that a SHORT is always
142	>	* <li>All delays and timeouts must use one of the constants {@code
143	>	* SHORT_DELAY_MS}, {@code SMALL_DELAY_MS}, {@code MEDIUM_DELAY_MS},
144	>	* {@code LONG_DELAY_MS}. The idea here is that a SHORT is always
145		* discriminable from zero time, and always allows enough time for the
146		* small amounts of computation (creating a thread, calling a few
147		* methods, etc) needed to reach a timeout point. Similarly, a SMALL
148		* is always discriminable as larger than SHORT and smaller than
149		* MEDIUM.  And so on. These constants are set to conservative values,
150		* but even so, if there is ever any doubt, they can all be increased
151	<	* in one spot to rerun tests on slower platforms</li>
151	>	* in one spot to rerun tests on slower platforms.
152		*
153	<	* <li> All threads generated must be joined inside each test case
154	<	* method (or <tt>fail</tt> to do so) before returning from the
155	<	* method. The <tt> joinPool</tt> method can be used to do this when
156	<	* using Executors.</li>
153	>	* <li>All threads generated must be joined inside each test case
154	>	* method (or {@code fail} to do so) before returning from the
155	>	* method. The {@code joinPool} method can be used to do this when
156	>	* using Executors.
157		*
158		* </ol>
159		*
160	<	* <p> <b>Other notes</b>
160	>	* <p><b>Other notes</b>
161		* <ul>
162		*
163	<	* <li> Usually, there is one testcase method per JSR166 method
163	>	* <li>Usually, there is one testcase method per JSR166 method
164		* covering "normal" operation, and then as many exception-testing
165		* methods as there are exceptions the method can throw. Sometimes
166		* there are multiple tests per JSR166 method when the different
167		* "normal" behaviors differ significantly. And sometimes testcases
168	<	* cover multiple methods when they cannot be tested in
169	<	* isolation.</li>
170	<	*
67	<	* <li> The documentation style for testcases is to provide as javadoc
168	>	* cover multiple methods when they cannot be tested in isolation.
169	>	*
170	>	* <li>The documentation style for testcases is to provide as javadoc
171		* a simple sentence or two describing the property that the testcase
172		* method purports to test. The javadocs do not say anything about how
173	<	* the property is tested. To find out, read the code.</li>
173	>	* the property is tested. To find out, read the code.
174		*
175	<	* <li> These tests are "conformance tests", and do not attempt to
175	>	* <li>These tests are "conformance tests", and do not attempt to
176		* test throughput, latency, scalability or other performance factors
177		* (see the separate "jtreg" tests for a set intended to check these
178		* for the most central aspects of functionality.) So, most tests use
179		* the smallest sensible numbers of threads, collection sizes, etc
180	<	* needed to check basic conformance.</li>
180	>	* needed to check basic conformance.
181		*
182		* <li>The test classes currently do not declare inclusion in
183		* any particular package to simplify things for people integrating
184	<	* them in TCK test suites.</li>
184	>	* them in TCK test suites.
185		*
186	<	* <li> As a convenience, the <tt>main</tt> of this class (JSR166TestCase)
187	<	* runs all JSR166 unit tests.</li>
186	>	* <li>As a convenience, the {@code main} of this class (JSR166TestCase)
187	>	* runs all JSR166 unit tests.
188		*
189		* </ul>
190		*/
191		public class JSR166TestCase extends TestCase {
192	+	private static final boolean useSecurityManager =
193	+	Boolean.getBoolean("jsr166.useSecurityManager");
194	+
195	+	protected static final boolean expensiveTests =
196	+	Boolean.getBoolean("jsr166.expensiveTests");
197	+
198	+	/**
199	+	* If true, also run tests that are not part of the official tck
200	+	* because they test unspecified implementation details.
201	+	*/
202	+	protected static final boolean testImplementationDetails =
203	+	Boolean.getBoolean("jsr166.testImplementationDetails");
204	+
205	+	/**
206	+	* If true, report on stdout all "slow" tests, that is, ones that
207	+	* take more than profileThreshold milliseconds to execute.
208	+	*/
209	+	private static final boolean profileTests =
210	+	Boolean.getBoolean("jsr166.profileTests");
211	+
212	+	/**
213	+	* The number of milliseconds that tests are permitted for
214	+	* execution without being reported, when profileTests is set.
215	+	*/
216	+	private static final long profileThreshold =
217	+	Long.getLong("jsr166.profileThreshold", 100);
218	+
219		/**
220	<	* Runs all JSR166 unit tests using junit.textui.TestRunner
221	<	*/
222	<	public static void main (String[] args) {
223	<	int iters = 1;
224	<	if (args.length > 0)
225	<	iters = Integer.parseInt(args[0]);
226	<	Test s = suite();
227	<	for (int i = 0; i < iters; ++i) {
228	<	junit.textui.TestRunner.run (s);
220	>	* The number of repetitions per test (for tickling rare bugs).
221	>	*/
222	>	private static final int runsPerTest =
223	>	Integer.getInteger("jsr166.runsPerTest", 1);
224	>
225	>	/**
226	>	* The number of repetitions of the test suite (for finding leaks?).
227	>	*/
228	>	private static final int suiteRuns =
229	>	Integer.getInteger("jsr166.suiteRuns", 1);
230	>
231	>	/**
232	>	* Returns the value of the system property, or NaN if not defined.
233	>	*/
234	>	private static float systemPropertyValue(String name) {
235	>	String floatString = System.getProperty(name);
236	>	if (floatString == null)
237	>	return Float.NaN;
238	>	try {
239	>	return Float.parseFloat(floatString);
240	>	} catch (NumberFormatException ex) {
241	>	throw new IllegalArgumentException(
242	>	String.format("Bad float value in system property %s=%s",
243	>	name, floatString));
244	>	}
245	>	}
246	>
247	>	private static final ThreadMXBean THREAD_MXBEAN
248	>	= ManagementFactory.getThreadMXBean();
249	>
250	>	/**
251	>	* The scaling factor to apply to standard delays used in tests.
252	>	* May be initialized from any of:
253	>	* - the "jsr166.delay.factor" system property
254	>	* - the "test.timeout.factor" system property (as used by jtreg)
255	>	*   See: http://openjdk.java.net/jtreg/tag-spec.html
256	>	* - hard-coded fuzz factor when using a known slowpoke VM
257	>	*/
258	>	private static final float delayFactor = delayFactor();
259	>
260	>	private static float delayFactor() {
261	>	float x;
262	>	if (!Float.isNaN(x = systemPropertyValue("jsr166.delay.factor")))
263	>	return x;
264	>	if (!Float.isNaN(x = systemPropertyValue("test.timeout.factor")))
265	>	return x;
266	>	String prop = System.getProperty("java.vm.version");
267	>	if (prop != null && prop.matches(".*debug.*"))
268	>	return 4.0f; // How much slower is fastdebug than product?!
269	>	return 1.0f;
270	>	}
271	>
272	>	public JSR166TestCase() { super(); }
273	>	public JSR166TestCase(String name) { super(name); }
274	>
275	>	/**
276	>	* A filter for tests to run, matching strings of the form
277	>	* methodName(className), e.g. "testInvokeAll5(ForkJoinPoolTest)"
278	>	* Usefully combined with jsr166.runsPerTest.
279	>	*/
280	>	private static final Pattern methodFilter = methodFilter();
281	>
282	>	private static Pattern methodFilter() {
283	>	String regex = System.getProperty("jsr166.methodFilter");
284	>	return (regex == null) ? null : Pattern.compile(regex);
285	>	}
286	>
287	>	// Instrumentation to debug very rare, but very annoying hung test runs.
288	>	static volatile TestCase currentTestCase;
289	>	// static volatile int currentRun = 0;
290	>	static {
291	>	Runnable wedgedTestDetector = new Runnable() { public void run() {
292	>	// Avoid spurious reports with enormous runsPerTest.
293	>	// A single test case run should never take more than 1 second.
294	>	// But let's cap it at the high end too ...
295	>	final int timeoutMinutesMin = Math.max(runsPerTest / 60, 1)
296	>	* Math.max((int) delayFactor, 1);
297	>	final int timeoutMinutes = Math.min(15, timeoutMinutesMin);
298	>	for (TestCase lastTestCase = currentTestCase;;) {
299	>	try { MINUTES.sleep(timeoutMinutes); }
300	>	catch (InterruptedException unexpected) { break; }
301	>	if (lastTestCase == currentTestCase) {
302	>	System.err.printf(
303	>	"Looks like we're stuck running test: %s%n",
304	>	lastTestCase);
305	>	//                     System.err.printf(
306	>	//                         "Looks like we're stuck running test: %s (%d/%d)%n",
307	>	//                         lastTestCase, currentRun, runsPerTest);
308	>	//                     System.err.println("availableProcessors=" +
309	>	//                         Runtime.getRuntime().availableProcessors());
310	>	//                     System.err.printf("cpu model = %s%n", cpuModel());
311	>	dumpTestThreads();
312	>	// one stack dump is probably enough; more would be spam
313	>	break;
314	>	}
315	>	lastTestCase = currentTestCase;
316	>	}}};
317	>	Thread thread = new Thread(wedgedTestDetector, "WedgedTestDetector");
318	>	thread.setDaemon(true);
319	>	thread.start();
320	>	}
321	>
322	>	//     public static String cpuModel() {
323	>	//         try {
324	>	//             java.util.regex.Matcher matcher
325	>	//               = Pattern.compile("model name\\s*: (.*)")
326	>	//                 .matcher(new String(
327	>	//                     java.nio.file.Files.readAllBytes(
328	>	//                         java.nio.file.Paths.get("/proc/cpuinfo")), "UTF-8"));
329	>	//             matcher.find();
330	>	//             return matcher.group(1);
331	>	//         } catch (Exception ex) { return null; }
332	>	//     }
333	>
334	>	public void runBare() throws Throwable {
335	>	currentTestCase = this;
336	>	if (methodFilter == null
337	>	|| methodFilter.matcher(toString()).find())
338	>	super.runBare();
339	>	}
340	>
341	>	protected void runTest() throws Throwable {
342	>	for (int i = 0; i < runsPerTest; i++) {
343	>	// currentRun = i;
344	>	if (profileTests)
345	>	runTestProfiled();
346	>	else
347	>	super.runTest();
348	>	}
349	>	}
350	>
351	>	protected void runTestProfiled() throws Throwable {
352	>	for (int i = 0; i < 2; i++) {
353	>	long startTime = System.nanoTime();
354	>	super.runTest();
355	>	long elapsedMillis = millisElapsedSince(startTime);
356	>	if (elapsedMillis < profileThreshold)
357	>	break;
358	>	// Never report first run of any test; treat it as a
359	>	// warmup run, notably to trigger all needed classloading,
360	>	if (i > 0)
361	>	System.out.printf("%s: %d%n", toString(), elapsedMillis);
362	>	}
363	>	}
364	>
365	>	/**
366	>	* Runs all JSR166 unit tests using junit.textui.TestRunner.
367	>	*/
368	>	public static void main(String[] args) {
369	>	main(suite(), args);
370	>	}
371	>
372	>	static class PithyResultPrinter extends junit.textui.ResultPrinter {
373	>	PithyResultPrinter(java.io.PrintStream writer) { super(writer); }
374	>	long runTime;
375	>	public void startTest(Test test) {}
376	>	protected void printHeader(long runTime) {
377	>	this.runTime = runTime; // defer printing for later
378	>	}
379	>	protected void printFooter(TestResult result) {
380	>	if (result.wasSuccessful()) {
381	>	getWriter().println("OK (" + result.runCount() + " tests)"
382	>	+ "  Time: " + elapsedTimeAsString(runTime));
383	>	} else {
384	>	getWriter().println("Time: " + elapsedTimeAsString(runTime));
385	>	super.printFooter(result);
386	>	}
387	>	}
388	>	}
389	>
390	>	/**
391	>	* Returns a TestRunner that doesn't bother with unnecessary
392	>	* fluff, like printing a "." for each test case.
393	>	*/
394	>	static junit.textui.TestRunner newPithyTestRunner() {
395	>	junit.textui.TestRunner runner = new junit.textui.TestRunner();
396	>	runner.setPrinter(new PithyResultPrinter(System.out));
397	>	return runner;
398	>	}
399	>
400	>	/**
401	>	* Runs all unit tests in the given test suite.
402	>	* Actual behavior influenced by jsr166.* system properties.
403	>	*/
404	>	static void main(Test suite, String[] args) {
405	>	if (useSecurityManager) {
406	>	System.err.println("Setting a permissive security manager");
407	>	Policy.setPolicy(permissivePolicy());
408	>	System.setSecurityManager(new SecurityManager());
409	>	}
410	>	for (int i = 0; i < suiteRuns; i++) {
411	>	TestResult result = newPithyTestRunner().doRun(suite);
412	>	if (!result.wasSuccessful())
413	>	System.exit(1);
414		System.gc();
415		System.runFinalization();
416		}
102	–	System.exit(0);
417		}
418
419	+	public static TestSuite newTestSuite(Object... suiteOrClasses) {
420	+	TestSuite suite = new TestSuite();
421	+	for (Object suiteOrClass : suiteOrClasses) {
422	+	if (suiteOrClass instanceof TestSuite)
423	+	suite.addTest((TestSuite) suiteOrClass);
424	+	else if (suiteOrClass instanceof Class)
425	+	suite.addTest(new TestSuite((Class<?>) suiteOrClass));
426	+	else
427	+	throw new ClassCastException("not a test suite or class");
428	+	}
429	+	return suite;
430	+	}
431	+
432	+	public static void addNamedTestClasses(TestSuite suite,
433	+	String... testClassNames) {
434	+	for (String testClassName : testClassNames) {
435	+	try {
436	+	Class<?> testClass = Class.forName(testClassName);
437	+	Method m = testClass.getDeclaredMethod("suite");
438	+	suite.addTest(newTestSuite((Test)m.invoke(null)));
439	+	} catch (ReflectiveOperationException e) {
440	+	throw new AssertionError("Missing test class", e);
441	+	}
442	+	}
443	+	}
444	+
445	+	public static final double JAVA_CLASS_VERSION;
446	+	public static final String JAVA_SPECIFICATION_VERSION;
447	+	static {
448	+	try {
449	+	JAVA_CLASS_VERSION = java.security.AccessController.doPrivileged(
450	+	new java.security.PrivilegedAction<Double>() {
451	+	public Double run() {
452	+	return Double.valueOf(System.getProperty("java.class.version"));}});
453	+	JAVA_SPECIFICATION_VERSION = java.security.AccessController.doPrivileged(
454	+	new java.security.PrivilegedAction<String>() {
455	+	public String run() {
456	+	return System.getProperty("java.specification.version");}});
457	+	} catch (Throwable t) {
458	+	throw new Error(t);
459	+	}
460	+	}
461	+
462	+	public static boolean atLeastJava6()  { return JAVA_CLASS_VERSION >= 50.0; }
463	+	public static boolean atLeastJava7()  { return JAVA_CLASS_VERSION >= 51.0; }
464	+	public static boolean atLeastJava8()  { return JAVA_CLASS_VERSION >= 52.0; }
465	+	public static boolean atLeastJava9()  { return JAVA_CLASS_VERSION >= 53.0; }
466	+	public static boolean atLeastJava10() { return JAVA_CLASS_VERSION >= 54.0; }
467	+	public static boolean atLeastJava11() { return JAVA_CLASS_VERSION >= 55.0; }
468	+	public static boolean atLeastJava12() { return JAVA_CLASS_VERSION >= 56.0; }
469	+	public static boolean atLeastJava13() { return JAVA_CLASS_VERSION >= 57.0; }
470	+	public static boolean atLeastJava14() { return JAVA_CLASS_VERSION >= 58.0; }
471	+	public static boolean atLeastJava15() { return JAVA_CLASS_VERSION >= 59.0; }
472	+	public static boolean atLeastJava16() { return JAVA_CLASS_VERSION >= 60.0; }
473	+	public static boolean atLeastJava17() { return JAVA_CLASS_VERSION >= 61.0; }
474	+
475		/**
476	<	* Collects all JSR166 unit tests as one suite
477	<	*/
478	<	public static Test suite ( ) {
479	<	TestSuite suite = new TestSuite("JSR166 Unit Tests");
480	<
481	<	suite.addTest(new TestSuite(AbstractExecutorServiceTest.class));
482	<	suite.addTest(new TestSuite(AbstractQueueTest.class));
483	<	suite.addTest(new TestSuite(AbstractQueuedSynchronizerTest.class));
484	<	suite.addTest(new TestSuite(ArrayBlockingQueueTest.class));
485	<	suite.addTest(new TestSuite(ArrayDequeTest.class));
486	<	suite.addTest(new TestSuite(AtomicBooleanTest.class));
487	<	suite.addTest(new TestSuite(AtomicIntegerArrayTest.class));
488	<	suite.addTest(new TestSuite(AtomicIntegerFieldUpdaterTest.class));
489	<	suite.addTest(new TestSuite(AtomicIntegerTest.class));
490	<	suite.addTest(new TestSuite(AtomicLongArrayTest.class));
491	<	suite.addTest(new TestSuite(AtomicLongFieldUpdaterTest.class));
492	<	suite.addTest(new TestSuite(AtomicLongTest.class));
493	<	suite.addTest(new TestSuite(AtomicMarkableReferenceTest.class));
494	<	suite.addTest(new TestSuite(AtomicReferenceArrayTest.class));
495	<	suite.addTest(new TestSuite(AtomicReferenceFieldUpdaterTest.class));
496	<	suite.addTest(new TestSuite(AtomicReferenceTest.class));
497	<	suite.addTest(new TestSuite(AtomicStampedReferenceTest.class));
498	<	suite.addTest(new TestSuite(ConcurrentHashMapTest.class));
499	<	suite.addTest(new TestSuite(ConcurrentLinkedQueueTest.class));
500	<	suite.addTest(new TestSuite(ConcurrentSkipListMapTest.class));
501	<	suite.addTest(new TestSuite(ConcurrentSkipListSubMapTest.class));
502	<	suite.addTest(new TestSuite(ConcurrentSkipListSetTest.class));
503	<	suite.addTest(new TestSuite(ConcurrentSkipListSubSetTest.class));
504	<	suite.addTest(new TestSuite(CopyOnWriteArrayListTest.class));
505	<	suite.addTest(new TestSuite(CopyOnWriteArraySetTest.class));
506	<	suite.addTest(new TestSuite(CountDownLatchTest.class));
507	<	suite.addTest(new TestSuite(CyclicBarrierTest.class));
508	<	suite.addTest(new TestSuite(DelayQueueTest.class));
509	<	suite.addTest(new TestSuite(ExchangerTest.class));
510	<	suite.addTest(new TestSuite(ExecutorsTest.class));
511	<	suite.addTest(new TestSuite(ExecutorCompletionServiceTest.class));
512	<	suite.addTest(new TestSuite(FutureTaskTest.class));
513	<	suite.addTest(new TestSuite(LinkedBlockingDequeTest.class));
514	<	suite.addTest(new TestSuite(LinkedBlockingQueueTest.class));
515	<	suite.addTest(new TestSuite(LinkedListTest.class));
516	<	suite.addTest(new TestSuite(LockSupportTest.class));
517	<	suite.addTest(new TestSuite(PriorityBlockingQueueTest.class));
518	<	suite.addTest(new TestSuite(PriorityQueueTest.class));
519	<	suite.addTest(new TestSuite(ReentrantLockTest.class));
520	<	suite.addTest(new TestSuite(ReentrantReadWriteLockTest.class));
521	<	suite.addTest(new TestSuite(ScheduledExecutorTest.class));
522	<	suite.addTest(new TestSuite(SemaphoreTest.class));
523	<	suite.addTest(new TestSuite(SynchronousQueueTest.class));
524	<	suite.addTest(new TestSuite(SystemTest.class));
525	<	suite.addTest(new TestSuite(ThreadLocalTest.class));
526	<	suite.addTest(new TestSuite(ThreadPoolExecutorTest.class));
527	<	suite.addTest(new TestSuite(ThreadTest.class));
528	<	suite.addTest(new TestSuite(TimeUnitTest.class));
529	<	suite.addTest(new TestSuite(TreeMapTest.class));
530	<	suite.addTest(new TestSuite(TreeSetTest.class));
531	<
476	>	* Collects all JSR166 unit tests as one suite.
477	>	*/
478	>	public static Test suite() {
479	>	// Java7+ test classes
480	>	TestSuite suite = newTestSuite(
481	>	ForkJoinPoolTest.suite(),
482	>	ForkJoinTaskTest.suite(),
483	>	RecursiveActionTest.suite(),
484	>	RecursiveTaskTest.suite(),
485	>	LinkedTransferQueueTest.suite(),
486	>	PhaserTest.suite(),
487	>	ThreadLocalRandomTest.suite(),
488	>	AbstractExecutorServiceTest.suite(),
489	>	AbstractQueueTest.suite(),
490	>	AbstractQueuedSynchronizerTest.suite(),
491	>	AbstractQueuedLongSynchronizerTest.suite(),
492	>	ArrayBlockingQueueTest.suite(),
493	>	ArrayDequeTest.suite(),
494	>	ArrayListTest.suite(),
495	>	AtomicBooleanTest.suite(),
496	>	AtomicIntegerArrayTest.suite(),
497	>	AtomicIntegerFieldUpdaterTest.suite(),
498	>	AtomicIntegerTest.suite(),
499	>	AtomicLongArrayTest.suite(),
500	>	AtomicLongFieldUpdaterTest.suite(),
501	>	AtomicLongTest.suite(),
502	>	AtomicMarkableReferenceTest.suite(),
503	>	AtomicReferenceArrayTest.suite(),
504	>	AtomicReferenceFieldUpdaterTest.suite(),
505	>	AtomicReferenceTest.suite(),
506	>	AtomicStampedReferenceTest.suite(),
507	>	ConcurrentHashMapTest.suite(),
508	>	ConcurrentLinkedDequeTest.suite(),
509	>	ConcurrentLinkedQueueTest.suite(),
510	>	ConcurrentSkipListMapTest.suite(),
511	>	ConcurrentSkipListSubMapTest.suite(),
512	>	ConcurrentSkipListSetTest.suite(),
513	>	ConcurrentSkipListSubSetTest.suite(),
514	>	CopyOnWriteArrayListTest.suite(),
515	>	CopyOnWriteArraySetTest.suite(),
516	>	CountDownLatchTest.suite(),
517	>	CountedCompleterTest.suite(),
518	>	CyclicBarrierTest.suite(),
519	>	DelayQueueTest.suite(),
520	>	EntryTest.suite(),
521	>	ExchangerTest.suite(),
522	>	ExecutorsTest.suite(),
523	>	ExecutorCompletionServiceTest.suite(),
524	>	FutureTaskTest.suite(),
525	>	HashtableTest.suite(),
526	>	LinkedBlockingDequeTest.suite(),
527	>	LinkedBlockingQueueTest.suite(),
528	>	LinkedListTest.suite(),
529	>	LockSupportTest.suite(),
530	>	PriorityBlockingQueueTest.suite(),
531	>	PriorityQueueTest.suite(),
532	>	ReentrantLockTest.suite(),
533	>	ReentrantReadWriteLockTest.suite(),
534	>	ScheduledExecutorTest.suite(),
535	>	ScheduledExecutorSubclassTest.suite(),
536	>	SemaphoreTest.suite(),
537	>	SynchronousQueueTest.suite(),
538	>	SystemTest.suite(),
539	>	ThreadLocalTest.suite(),
540	>	ThreadPoolExecutorTest.suite(),
541	>	ThreadPoolExecutorSubclassTest.suite(),
542	>	ThreadTest.suite(),
543	>	TimeUnitTest.suite(),
544	>	TreeMapTest.suite(),
545	>	TreeSetTest.suite(),
546	>	TreeSubMapTest.suite(),
547	>	TreeSubSetTest.suite(),
548	>	VectorTest.suite());
549	>
550	>	// Java8+ test classes
551	>	if (atLeastJava8()) {
552	>	String[] java8TestClassNames = {
553	>	"ArrayDeque8Test",
554	>	"Atomic8Test",
555	>	"CompletableFutureTest",
556	>	"ConcurrentHashMap8Test",
557	>	"CountedCompleter8Test",
558	>	"DoubleAccumulatorTest",
559	>	"DoubleAdderTest",
560	>	"ForkJoinPool8Test",
561	>	"ForkJoinTask8Test",
562	>	"HashMapTest",
563	>	"LinkedBlockingDeque8Test",
564	>	"LinkedBlockingQueue8Test",
565	>	"LinkedHashMapTest",
566	>	"LongAccumulatorTest",
567	>	"LongAdderTest",
568	>	"SplittableRandomTest",
569	>	"StampedLockTest",
570	>	"SubmissionPublisherTest",
571	>	"ThreadLocalRandom8Test",
572	>	"TimeUnit8Test",
573	>	};
574	>	addNamedTestClasses(suite, java8TestClassNames);
575	>	}
576	>
577	>	// Java9+ test classes
578	>	if (atLeastJava9()) {
579	>	String[] java9TestClassNames = {
580	>	"AtomicBoolean9Test",
581	>	"AtomicInteger9Test",
582	>	"AtomicIntegerArray9Test",
583	>	"AtomicLong9Test",
584	>	"AtomicLongArray9Test",
585	>	"AtomicReference9Test",
586	>	"AtomicReferenceArray9Test",
587	>	"ExecutorCompletionService9Test",
588	>	"ForkJoinPool9Test",
589	>	};
590	>	addNamedTestClasses(suite, java9TestClassNames);
591	>	}
592	>
593		return suite;
594		}
595
596	+	/** Returns list of junit-style test method names in given class. */
597	+	public static ArrayList<String> testMethodNames(Class<?> testClass) {
598	+	Method[] methods = testClass.getDeclaredMethods();
599	+	ArrayList<String> names = new ArrayList<>(methods.length);
600	+	for (Method method : methods) {
601	+	if (method.getName().startsWith("test")
602	+	&& Modifier.isPublic(method.getModifiers())
603	+	// method.getParameterCount() requires jdk8+
604	+	&& method.getParameterTypes().length == 0) {
605	+	names.add(method.getName());
606	+	}
607	+	}
608	+	return names;
609	+	}
610	+
611	+	/**
612	+	* Returns junit-style testSuite for the given test class, but
613	+	* parameterized by passing extra data to each test.
614	+	*/
615	+	public static <ExtraData> Test parameterizedTestSuite
616	+	(Class<? extends JSR166TestCase> testClass,
617	+	Class<ExtraData> dataClass,
618	+	ExtraData data) {
619	+	try {
620	+	TestSuite suite = new TestSuite();
621	+	Constructor c =
622	+	testClass.getDeclaredConstructor(dataClass, String.class);
623	+	for (String methodName : testMethodNames(testClass))
624	+	suite.addTest((Test) c.newInstance(data, methodName));
625	+	return suite;
626	+	} catch (ReflectiveOperationException e) {
627	+	throw new AssertionError(e);
628	+	}
629	+	}
630	+
631	+	/**
632	+	* Returns junit-style testSuite for the jdk8 extension of the
633	+	* given test class, but parameterized by passing extra data to
634	+	* each test.  Uses reflection to allow compilation in jdk7.
635	+	*/
636	+	public static <ExtraData> Test jdk8ParameterizedTestSuite
637	+	(Class<? extends JSR166TestCase> testClass,
638	+	Class<ExtraData> dataClass,
639	+	ExtraData data) {
640	+	if (atLeastJava8()) {
641	+	String name = testClass.getName();
642	+	String name8 = name.replaceAll("Test$", "8Test");
643	+	if (name.equals(name8)) throw new AssertionError(name);
644	+	try {
645	+	return (Test)
646	+	Class.forName(name8)
647	+	.getMethod("testSuite", dataClass)
648	+	.invoke(null, data);
649	+	} catch (ReflectiveOperationException e) {
650	+	throw new AssertionError(e);
651	+	}
652	+	} else {
653	+	return new TestSuite();
654	+	}
655	+	}
656	+
657	+	// Delays for timing-dependent tests, in milliseconds.
658
659		public static long SHORT_DELAY_MS;
660		public static long SMALL_DELAY_MS;
661		public static long MEDIUM_DELAY_MS;
662		public static long LONG_DELAY_MS;
663
664	+	/**
665	+	* A delay significantly longer than LONG_DELAY_MS.
666	+	* Use this in a thread that is waited for via awaitTermination(Thread).
667	+	*/
668	+	public static long LONGER_DELAY_MS;
669	+
670	+	private static final long RANDOM_TIMEOUT;
671	+	private static final long RANDOM_EXPIRED_TIMEOUT;
672	+	private static final TimeUnit RANDOM_TIMEUNIT;
673	+	static {
674	+	ThreadLocalRandom rnd = ThreadLocalRandom.current();
675	+	long[] timeouts = { Long.MIN_VALUE, -1, 0, 1, Long.MAX_VALUE };
676	+	RANDOM_TIMEOUT = timeouts[rnd.nextInt(timeouts.length)];
677	+	RANDOM_EXPIRED_TIMEOUT = timeouts[rnd.nextInt(3)];
678	+	TimeUnit[] timeUnits = TimeUnit.values();
679	+	RANDOM_TIMEUNIT = timeUnits[rnd.nextInt(timeUnits.length)];
680	+	}
681
682		/**
683	<	* Return the shortest timed delay. This could
684	<	* be reimplemented to use for example a Property.
685	<	*/
686	<	protected long getShortDelay() {
687	<	return 50;
683	>	* Returns a timeout for use when any value at all will do.
684	>	*/
685	>	static long randomTimeout() { return RANDOM_TIMEOUT; }
686	>
687	>	/**
688	>	* Returns a timeout that means "no waiting", i.e. not positive.
689	>	*/
690	>	static long randomExpiredTimeout() { return RANDOM_EXPIRED_TIMEOUT; }
691	>
692	>	/**
693	>	* Returns a random non-null TimeUnit.
694	>	*/
695	>	static TimeUnit randomTimeUnit() { return RANDOM_TIMEUNIT; }
696	>
697	>	/**
698	>	* Returns a random boolean; a "coin flip".
699	>	*/
700	>	static boolean randomBoolean() {
701	>	return ThreadLocalRandom.current().nextBoolean();
702		}
703
704	+	/**
705	+	* Returns a random element from given choices.
706	+	*/
707	+	<T> T chooseRandomly(T... choices) {
708	+	return choices[ThreadLocalRandom.current().nextInt(choices.length)];
709	+	}
710	+
711	+	/**
712	+	* Returns the shortest timed delay. This can be scaled up for
713	+	* slow machines using the jsr166.delay.factor system property,
714	+	* or via jtreg's -timeoutFactor: flag.
715	+	* http://openjdk.java.net/jtreg/command-help.html
716	+	*/
717	+	protected long getShortDelay() {
718	+	return (long) (50 * delayFactor);
719	+	}
720
721		/**
722	<	* Set delays as multiples of SHORT_DELAY.
722	>	* Sets delays as multiples of SHORT_DELAY.
723		*/
724	<	protected  void setDelays() {
724	>	protected void setDelays() {
725		SHORT_DELAY_MS = getShortDelay();
726	<	SMALL_DELAY_MS = SHORT_DELAY_MS * 5;
726	>	SMALL_DELAY_MS  = SHORT_DELAY_MS * 5;
727		MEDIUM_DELAY_MS = SHORT_DELAY_MS * 10;
728	<	LONG_DELAY_MS = SHORT_DELAY_MS * 50;
728	>	LONG_DELAY_MS   = SHORT_DELAY_MS * 200;
729	>	LONGER_DELAY_MS = 2 * LONG_DELAY_MS;
730		}
731
732	+	private static final long TIMEOUT_DELAY_MS
733	+	= (long) (12.0 * Math.cbrt(delayFactor));
734	+
735		/**
736	<	* Flag set true if any threadAssert methods fail
736	>	* Returns a timeout in milliseconds to be used in tests that verify
737	>	* that operations block or time out.  We want this to be longer
738	>	* than the OS scheduling quantum, but not too long, so don't scale
739	>	* linearly with delayFactor; we use "crazy" cube root instead.
740		*/
741	<	volatile boolean threadFailed;
741	>	static long timeoutMillis() {
742	>	return TIMEOUT_DELAY_MS;
743	>	}
744	>
745	>	/**
746	>	* Returns a new Date instance representing a time at least
747	>	* delayMillis milliseconds in the future.
748	>	*/
749	>	Date delayedDate(long delayMillis) {
750	>	// Add 1 because currentTimeMillis is known to round into the past.
751	>	return new Date(System.currentTimeMillis() + delayMillis + 1);
752	>	}
753
754		/**
755	<	* Initialize test to indicate that no thread assertions have failed
755	>	* The first exception encountered if any threadAssertXXX method fails.
756		*/
757	<	public void setUp() {
757	>	private final AtomicReference<Throwable> threadFailure
758	>	= new AtomicReference<>(null);
759	>
760	>	/**
761	>	* Records an exception so that it can be rethrown later in the test
762	>	* harness thread, triggering a test case failure.  Only the first
763	>	* failure is recorded; subsequent calls to this method from within
764	>	* the same test have no effect.
765	>	*/
766	>	public void threadRecordFailure(Throwable t) {
767	>	System.err.println(t);
768	>	if (threadFailure.compareAndSet(null, t))
769	>	dumpTestThreads();
770	>	}
771	>
772	>	public void setUp() {
773		setDelays();
774	<	threadFailed = false;
774	>	}
775	>
776	>	void tearDownFail(String format, Object... args) {
777	>	String msg = toString() + ": " + String.format(format, args);
778	>	System.err.println(msg);
779	>	dumpTestThreads();
780	>	throw new AssertionError(msg);
781	>	}
782	>
783	>	/**
784	>	* Extra checks that get done for all test cases.
785	>	*
786	>	* Triggers test case failure if any thread assertions have failed,
787	>	* by rethrowing, in the test harness thread, any exception recorded
788	>	* earlier by threadRecordFailure.
789	>	*
790	>	* Triggers test case failure if interrupt status is set in the main thread.
791	>	*/
792	>	public void tearDown() throws Exception {
793	>	Throwable t = threadFailure.getAndSet(null);
794	>	if (t != null) {
795	>	if (t instanceof Error)
796	>	throw (Error) t;
797	>	else if (t instanceof RuntimeException)
798	>	throw (RuntimeException) t;
799	>	else if (t instanceof Exception)
800	>	throw (Exception) t;
801	>	else
802	>	throw new AssertionError(t.toString(), t);
803	>	}
804	>
805	>	if (Thread.interrupted())
806	>	tearDownFail("interrupt status set in main thread");
807	>
808	>	checkForkJoinPoolThreadLeaks();
809		}
810
811		/**
812	<	* Trigger test case failure if any thread assertions have failed
812	>	* Finds missing PoolCleaners
813		*/
814	<	public void tearDown() {
815	<	assertFalse(threadFailed);
814	>	void checkForkJoinPoolThreadLeaks() throws InterruptedException {
815	>	Thread[] survivors = new Thread[7];
816	>	int count = Thread.enumerate(survivors);
817	>	for (int i = 0; i < count; i++) {
818	>	Thread thread = survivors[i];
819	>	String name = thread.getName();
820	>	if (name.startsWith("ForkJoinPool-")) {
821	>	// give thread some time to terminate
822	>	thread.join(LONG_DELAY_MS);
823	>	if (thread.isAlive())
824	>	tearDownFail("Found leaked ForkJoinPool thread thread=%s",
825	>	thread);
826	>	}
827	>	}
828	>
829	>	if (!ForkJoinPool.commonPool()
830	>	.awaitQuiescence(LONG_DELAY_MS, MILLISECONDS))
831	>	tearDownFail("ForkJoin common pool thread stuck");
832		}
833
834		/**
835	<	* Fail, also setting status to indicate current testcase should fail
836	<	*/
835	>	* Just like fail(reason), but additionally recording (using
836	>	* threadRecordFailure) any AssertionError thrown, so that the
837	>	* current testcase will fail.
838	>	*/
839		public void threadFail(String reason) {
840	<	threadFailed = true;
841	<	fail(reason);
840	>	try {
841	>	fail(reason);
842	>	} catch (AssertionError fail) {
843	>	threadRecordFailure(fail);
844	>	throw fail;
845	>	}
846		}
847
848		/**
849	<	* If expression not true, set status to indicate current testcase
850	<	* should fail
851	<	*/
849	>	* Just like assertTrue(b), but additionally recording (using
850	>	* threadRecordFailure) any AssertionError thrown, so that the
851	>	* current testcase will fail.
852	>	*/
853		public void threadAssertTrue(boolean b) {
854	<	if (!b) {
225	<	threadFailed = true;
854	>	try {
855		assertTrue(b);
856	+	} catch (AssertionError fail) {
857	+	threadRecordFailure(fail);
858	+	throw fail;
859		}
860		}
861
862		/**
863	<	* If expression not false, set status to indicate current testcase
864	<	* should fail
865	<	*/
863	>	* Just like assertFalse(b), but additionally recording (using
864	>	* threadRecordFailure) any AssertionError thrown, so that the
865	>	* current testcase will fail.
866	>	*/
867		public void threadAssertFalse(boolean b) {
868	<	if (b) {
236	<	threadFailed = true;
868	>	try {
869		assertFalse(b);
870	+	} catch (AssertionError fail) {
871	+	threadRecordFailure(fail);
872	+	throw fail;
873		}
874		}
875
876		/**
877	<	* If argument not null, set status to indicate current testcase
878	<	* should fail
879	<	*/
877	>	* Just like assertNull(x), but additionally recording (using
878	>	* threadRecordFailure) any AssertionError thrown, so that the
879	>	* current testcase will fail.
880	>	*/
881		public void threadAssertNull(Object x) {
882	<	if (x != null) {
247	<	threadFailed = true;
882	>	try {
883		assertNull(x);
884	+	} catch (AssertionError fail) {
885	+	threadRecordFailure(fail);
886	+	throw fail;
887		}
888		}
889
890		/**
891	<	* If arguments not equal, set status to indicate current testcase
892	<	* should fail
893	<	*/
891	>	* Just like assertEquals(x, y), but additionally recording (using
892	>	* threadRecordFailure) any AssertionError thrown, so that the
893	>	* current testcase will fail.
894	>	*/
895		public void threadAssertEquals(long x, long y) {
896	<	if (x != y) {
258	<	threadFailed = true;
896	>	try {
897		assertEquals(x, y);
898	+	} catch (AssertionError fail) {
899	+	threadRecordFailure(fail);
900	+	throw fail;
901		}
902		}
903
904		/**
905	<	* If arguments not equal, set status to indicate current testcase
906	<	* should fail
907	<	*/
905	>	* Just like assertEquals(x, y), but additionally recording (using
906	>	* threadRecordFailure) any AssertionError thrown, so that the
907	>	* current testcase will fail.
908	>	*/
909		public void threadAssertEquals(Object x, Object y) {
910	<	if (x != y && (x == null || !x.equals(y))) {
269	<	threadFailed = true;
910	>	try {
911		assertEquals(x, y);
912	+	} catch (AssertionError fail) {
913	+	threadRecordFailure(fail);
914	+	throw fail;
915	+	} catch (Throwable fail) {
916	+	threadUnexpectedException(fail);
917	+	}
918	+	}
919	+
920	+	/**
921	+	* Just like assertSame(x, y), but additionally recording (using
922	+	* threadRecordFailure) any AssertionError thrown, so that the
923	+	* current testcase will fail.
924	+	*/
925	+	public void threadAssertSame(Object x, Object y) {
926	+	try {
927	+	assertSame(x, y);
928	+	} catch (AssertionError fail) {
929	+	threadRecordFailure(fail);
930	+	throw fail;
931		}
932		}
933
934		/**
935	<	* threadFail with message "should throw exception"
936	<	*/
935	>	* Calls threadFail with message "should throw exception".
936	>	*/
937		public void threadShouldThrow() {
938	<	threadFailed = true;
939	<	fail("should throw exception");
938	>	threadFail("should throw exception");
939	>	}
940	>
941	>	/**
942	>	* Calls threadFail with message "should throw" + exceptionName.
943	>	*/
944	>	public void threadShouldThrow(String exceptionName) {
945	>	threadFail("should throw " + exceptionName);
946	>	}
947	>
948	>	/**
949	>	* Records the given exception using {@link #threadRecordFailure},
950	>	* then rethrows the exception, wrapping it in an AssertionError
951	>	* if necessary.
952	>	*/
953	>	public void threadUnexpectedException(Throwable t) {
954	>	threadRecordFailure(t);
955	>	t.printStackTrace();
956	>	if (t instanceof RuntimeException)
957	>	throw (RuntimeException) t;
958	>	else if (t instanceof Error)
959	>	throw (Error) t;
960	>	else
961	>	throw new AssertionError("unexpected exception: " + t, t);
962	>	}
963	>
964	>	/**
965	>	* Delays, via Thread.sleep, for the given millisecond delay, but
966	>	* if the sleep is shorter than specified, may re-sleep or yield
967	>	* until time elapses.  Ensures that the given time, as measured
968	>	* by System.nanoTime(), has elapsed.
969	>	*/
970	>	static void delay(long millis) throws InterruptedException {
971	>	long nanos = millis * (1000 * 1000);
972	>	final long wakeupTime = System.nanoTime() + nanos;
973	>	do {
974	>	if (millis > 0L)
975	>	Thread.sleep(millis);
976	>	else // too short to sleep
977	>	Thread.yield();
978	>	nanos = wakeupTime - System.nanoTime();
979	>	millis = nanos / (1000 * 1000);
980	>	} while (nanos >= 0L);
981		}
982
983		/**
984	<	* threadFail with message "Unexpected exception"
984	>	* Allows use of try-with-resources with per-test thread pools.
985		*/
986	<	public void threadUnexpectedException() {
987	<	threadFailed = true;
988	<	fail("Unexpected exception");
986	>	class PoolCleaner implements AutoCloseable {
987	>	private final ExecutorService pool;
988	>	public PoolCleaner(ExecutorService pool) { this.pool = pool; }
989	>	public void close() { joinPool(pool); }
990	>	}
991	>
992	>	/**
993	>	* An extension of PoolCleaner that has an action to release the pool.
994	>	*/
995	>	class PoolCleanerWithReleaser extends PoolCleaner {
996	>	private final Runnable releaser;
997	>	public PoolCleanerWithReleaser(ExecutorService pool, Runnable releaser) {
998	>	super(pool);
999	>	this.releaser = releaser;
1000	>	}
1001	>	public void close() {
1002	>	try {
1003	>	releaser.run();
1004	>	} finally {
1005	>	super.close();
1006	>	}
1007	>	}
1008	>	}
1009	>
1010	>	PoolCleaner cleaner(ExecutorService pool) {
1011	>	return new PoolCleaner(pool);
1012	>	}
1013	>
1014	>	PoolCleaner cleaner(ExecutorService pool, Runnable releaser) {
1015	>	return new PoolCleanerWithReleaser(pool, releaser);
1016	>	}
1017	>
1018	>	PoolCleaner cleaner(ExecutorService pool, CountDownLatch latch) {
1019	>	return new PoolCleanerWithReleaser(pool, releaser(latch));
1020		}
1021
1022	+	Runnable releaser(final CountDownLatch latch) {
1023	+	return new Runnable() { public void run() {
1024	+	do { latch.countDown(); }
1025	+	while (latch.getCount() > 0);
1026	+	}};
1027	+	}
1028	+
1029	+	PoolCleaner cleaner(ExecutorService pool, AtomicBoolean flag) {
1030	+	return new PoolCleanerWithReleaser(pool, releaser(flag));
1031	+	}
1032	+
1033	+	Runnable releaser(final AtomicBoolean flag) {
1034	+	return new Runnable() { public void run() { flag.set(true); }};
1035	+	}
1036
1037		/**
1038	<	* Wait out termination of a thread pool or fail doing so
1038	>	* Waits out termination of a thread pool or fails doing so.
1039		*/
1040	<	public void joinPool(ExecutorService exec) {
1040	>	void joinPool(ExecutorService pool) {
1041		try {
1042	<	exec.shutdown();
1043	<	assertTrue(exec.awaitTermination(LONG_DELAY_MS, TimeUnit.MILLISECONDS));
1044	<	} catch(SecurityException ok) {
1042	>	pool.shutdown();
1043	>	if (!pool.awaitTermination(2 * LONG_DELAY_MS, MILLISECONDS)) {
1044	>	try {
1045	>	threadFail("ExecutorService " + pool +
1046	>	" did not terminate in a timely manner");
1047	>	} finally {
1048	>	// last resort, for the benefit of subsequent tests
1049	>	pool.shutdownNow();
1050	>	pool.awaitTermination(MEDIUM_DELAY_MS, MILLISECONDS);
1051	>	}
1052	>	}
1053	>	} catch (SecurityException ok) {
1054		// Allowed in case test doesn't have privs
1055	<	} catch(InterruptedException ie) {
1056	<	fail("Unexpected exception");
1055	>	} catch (InterruptedException fail) {
1056	>	threadFail("Unexpected InterruptedException");
1057	>	}
1058	>	}
1059	>
1060	>	/**
1061	>	* Like Runnable, but with the freedom to throw anything.
1062	>	* junit folks had the same idea:
1063	>	* http://junit.org/junit5/docs/snapshot/api/org/junit/gen5/api/Executable.html
1064	>	*/
1065	>	interface Action { public void run() throws Throwable; }
1066	>
1067	>	/**
1068	>	* Runs all the given actions in parallel, failing if any fail.
1069	>	* Useful for running multiple variants of tests that are
1070	>	* necessarily individually slow because they must block.
1071	>	*/
1072	>	void testInParallel(Action ... actions) {
1073	>	ExecutorService pool = Executors.newCachedThreadPool();
1074	>	try (PoolCleaner cleaner = cleaner(pool)) {
1075	>	ArrayList<Future<?>> futures = new ArrayList<>(actions.length);
1076	>	for (final Action action : actions)
1077	>	futures.add(pool.submit(new CheckedRunnable() {
1078	>	public void realRun() throws Throwable { action.run();}}));
1079	>	for (Future<?> future : futures)
1080	>	try {
1081	>	assertNull(future.get(LONG_DELAY_MS, MILLISECONDS));
1082	>	} catch (ExecutionException ex) {
1083	>	threadUnexpectedException(ex.getCause());
1084	>	} catch (Exception ex) {
1085	>	threadUnexpectedException(ex);
1086	>	}
1087	>	}
1088	>	}
1089	>
1090	>	/** Returns true if thread info might be useful in a thread dump. */
1091	>	static boolean threadOfInterest(ThreadInfo info) {
1092	>	final String name = info.getThreadName();
1093	>	String lockName;
1094	>	if (name == null)
1095	>	return true;
1096	>	if (name.equals("Signal Dispatcher")
1097	>	|| name.equals("WedgedTestDetector"))
1098	>	return false;
1099	>	if (name.equals("Reference Handler")) {
1100	>	// Reference Handler stacktrace changed in JDK-8156500
1101	>	StackTraceElement[] stackTrace; String methodName;
1102	>	if ((stackTrace = info.getStackTrace()) != null
1103	>	&& stackTrace.length > 0
1104	>	&& (methodName = stackTrace[0].getMethodName()) != null
1105	>	&& methodName.equals("waitForReferencePendingList"))
1106	>	return false;
1107	>	// jdk8 Reference Handler stacktrace
1108	>	if ((lockName = info.getLockName()) != null
1109	>	&& lockName.startsWith("java.lang.ref"))
1110	>	return false;
1111	>	}
1112	>	if ((name.equals("Finalizer") || name.equals("Common-Cleaner"))
1113	>	&& (lockName = info.getLockName()) != null
1114	>	&& lockName.startsWith("java.lang.ref"))
1115	>	return false;
1116	>	if (name.startsWith("ForkJoinPool.commonPool-worker")
1117	>	&& (lockName = info.getLockName()) != null
1118	>	&& lockName.startsWith("java.util.concurrent.ForkJoinPool"))
1119	>	return false;
1120	>	return true;
1121	>	}
1122	>
1123	>	/**
1124	>	* A debugging tool to print stack traces of most threads, as jstack does.
1125	>	* Uninteresting threads are filtered out.
1126	>	*/
1127	>	static void dumpTestThreads() {
1128	>	SecurityManager sm = System.getSecurityManager();
1129	>	if (sm != null) {
1130	>	try {
1131	>	System.setSecurityManager(null);
1132	>	} catch (SecurityException giveUp) {
1133	>	return;
1134	>	}
1135	>	}
1136	>
1137	>	System.err.println("------ stacktrace dump start ------");
1138	>	for (ThreadInfo info : THREAD_MXBEAN.dumpAllThreads(true, true))
1139	>	if (threadOfInterest(info))
1140	>	System.err.print(info);
1141	>	System.err.println("------ stacktrace dump end ------");
1142	>
1143	>	if (sm != null) System.setSecurityManager(sm);
1144	>	}
1145	>
1146	>	/**
1147	>	* Checks that thread eventually enters the expected blocked thread state.
1148	>	*/
1149	>	void assertThreadBlocks(Thread thread, Thread.State expected) {
1150	>	// always sleep at least 1 ms, with high probability avoiding
1151	>	// transitory states
1152	>	for (long retries = LONG_DELAY_MS * 3 / 4; retries-->0; ) {
1153	>	try { delay(1); }
1154	>	catch (InterruptedException fail) {
1155	>	throw new AssertionError("Unexpected InterruptedException", fail);
1156	>	}
1157	>	Thread.State s = thread.getState();
1158	>	if (s == expected)
1159	>	return;
1160	>	else if (s == Thread.State.TERMINATED)
1161	>	fail("Unexpected thread termination");
1162		}
1163	+	fail("timed out waiting for thread to enter thread state " + expected);
1164	+	}
1165	+
1166	+	/**
1167	+	* Returns the thread's blocker's class name, if any, else null.
1168	+	*/
1169	+	String blockerClassName(Thread thread) {
1170	+	ThreadInfo threadInfo; LockInfo lockInfo;
1171	+	if ((threadInfo = THREAD_MXBEAN.getThreadInfo(thread.getId(), 0)) != null
1172	+	&& (lockInfo = threadInfo.getLockInfo()) != null)
1173	+	return lockInfo.getClassName();
1174	+	return null;
1175		}
1176
1177	+	/**
1178	+	* Checks that future.get times out, with the default timeout of
1179	+	* {@code timeoutMillis()}.
1180	+	*/
1181	+	void assertFutureTimesOut(Future future) {
1182	+	assertFutureTimesOut(future, timeoutMillis());
1183	+	}
1184	+
1185	+	/**
1186	+	* Checks that future.get times out, with the given millisecond timeout.
1187	+	*/
1188	+	void assertFutureTimesOut(Future future, long timeoutMillis) {
1189	+	long startTime = System.nanoTime();
1190	+	try {
1191	+	future.get(timeoutMillis, MILLISECONDS);
1192	+	shouldThrow();
1193	+	} catch (TimeoutException success) {
1194	+	} catch (Exception fail) {
1195	+	threadUnexpectedException(fail);
1196	+	} finally { future.cancel(true); }
1197	+	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
1198	+	}
1199
1200		/**
1201	<	* fail with message "should throw exception"
1202	<	*/
1201	>	* Fails with message "should throw exception".
1202	>	*/
1203		public void shouldThrow() {
1204		fail("Should throw exception");
1205		}
1206
1207		/**
1208	<	* fail with message "Unexpected exception"
1208	>	* Fails with message "should throw " + exceptionName.
1209		*/
1210	<	public void unexpectedException() {
1211	<	fail("Unexpected exception");
1210	>	public void shouldThrow(String exceptionName) {
1211	>	fail("Should throw " + exceptionName);
1212		}
1213
1214	+	/**
1215	+	* The maximum number of consecutive spurious wakeups we should
1216	+	* tolerate (from APIs like LockSupport.park) before failing a test.
1217	+	*/
1218	+	static final int MAX_SPURIOUS_WAKEUPS = 10;
1219
1220		/**
1221		* The number of elements to place in collections, arrays, etc.
1222		*/
1223	<	static final int SIZE = 20;
1223	>	public static final int SIZE = 20;
1224
1225		// Some convenient Integer constants
1226
1227	<	static final Integer zero = new Integer(0);
1228	<	static final Integer one = new Integer(1);
1229	<	static final Integer two = new Integer(2);
1230	<	static final Integer three  = new Integer(3);
1231	<	static final Integer four  = new Integer(4);
1232	<	static final Integer five  = new Integer(5);
1233	<	static final Integer six = new Integer(6);
1234	<	static final Integer seven = new Integer(7);
1235	<	static final Integer eight = new Integer(8);
1236	<	static final Integer nine = new Integer(9);
1237	<	static final Integer m1  = new Integer(-1);
1238	<	static final Integer m2  = new Integer(-2);
1239	<	static final Integer m3  = new Integer(-3);
1240	<	static final Integer m4 = new Integer(-4);
1241	<	static final Integer m5 = new Integer(-5);
1242	<	static final Integer m10 = new Integer(-10);
1227	>	public static final Integer zero  = new Integer(0);
1228	>	public static final Integer one   = new Integer(1);
1229	>	public static final Integer two   = new Integer(2);
1230	>	public static final Integer three = new Integer(3);
1231	>	public static final Integer four  = new Integer(4);
1232	>	public static final Integer five  = new Integer(5);
1233	>	public static final Integer six   = new Integer(6);
1234	>	public static final Integer seven = new Integer(7);
1235	>	public static final Integer eight = new Integer(8);
1236	>	public static final Integer nine  = new Integer(9);
1237	>	public static final Integer m1  = new Integer(-1);
1238	>	public static final Integer m2  = new Integer(-2);
1239	>	public static final Integer m3  = new Integer(-3);
1240	>	public static final Integer m4  = new Integer(-4);
1241	>	public static final Integer m5  = new Integer(-5);
1242	>	public static final Integer m6  = new Integer(-6);
1243	>	public static final Integer m10 = new Integer(-10);
1244	>
1245	>	/**
1246	>	* Runs Runnable r with a security policy that permits precisely
1247	>	* the specified permissions.  If there is no current security
1248	>	* manager, the runnable is run twice, both with and without a
1249	>	* security manager.  We require that any security manager permit
1250	>	* getPolicy/setPolicy.
1251	>	*/
1252	>	public void runWithPermissions(Runnable r, Permission... permissions) {
1253	>	SecurityManager sm = System.getSecurityManager();
1254	>	if (sm == null) {
1255	>	r.run();
1256	>	}
1257	>	runWithSecurityManagerWithPermissions(r, permissions);
1258	>	}
1259	>
1260	>	/**
1261	>	* Runs Runnable r with a security policy that permits precisely
1262	>	* the specified permissions.  If there is no current security
1263	>	* manager, a temporary one is set for the duration of the
1264	>	* Runnable.  We require that any security manager permit
1265	>	* getPolicy/setPolicy.
1266	>	*/
1267	>	public void runWithSecurityManagerWithPermissions(Runnable r,
1268	>	Permission... permissions) {
1269	>	SecurityManager sm = System.getSecurityManager();
1270	>	if (sm == null) {
1271	>	Policy savedPolicy = Policy.getPolicy();
1272	>	try {
1273	>	Policy.setPolicy(permissivePolicy());
1274	>	System.setSecurityManager(new SecurityManager());
1275	>	runWithSecurityManagerWithPermissions(r, permissions);
1276	>	} finally {
1277	>	System.setSecurityManager(null);
1278	>	Policy.setPolicy(savedPolicy);
1279	>	}
1280	>	} else {
1281	>	Policy savedPolicy = Policy.getPolicy();
1282	>	AdjustablePolicy policy = new AdjustablePolicy(permissions);
1283	>	Policy.setPolicy(policy);
1284
1285	+	try {
1286	+	r.run();
1287	+	} finally {
1288	+	policy.addPermission(new SecurityPermission("setPolicy"));
1289	+	Policy.setPolicy(savedPolicy);
1290	+	}
1291	+	}
1292	+	}
1293	+
1294	+	/**
1295	+	* Runs a runnable without any permissions.
1296	+	*/
1297	+	public void runWithoutPermissions(Runnable r) {
1298	+	runWithPermissions(r);
1299	+	}
1300
1301		/**
1302		* A security policy where new permissions can be dynamically added
1303		* or all cleared.
1304		*/
1305	<	static class AdjustablePolicy extends java.security.Policy {
1305	>	public static class AdjustablePolicy extends java.security.Policy {
1306		Permissions perms = new Permissions();
1307	<	AdjustablePolicy() { }
1307	>	AdjustablePolicy(Permission... permissions) {
1308	>	for (Permission permission : permissions)
1309	>	perms.add(permission);
1310	>	}
1311		void addPermission(Permission perm) { perms.add(perm); }
1312		void clearPermissions() { perms = new Permissions(); }
1313	<	public PermissionCollection getPermissions(CodeSource cs) {
1314	<	return perms;
1315	<	}
1316	<	public PermissionCollection getPermissions(ProtectionDomain pd) {
1317	<	return perms;
1318	<	}
1319	<	public boolean implies(ProtectionDomain pd, Permission p) {
1320	<	return perms.implies(p);
1321	<	}
1322	<	public void refresh() {}
1313	>	public PermissionCollection getPermissions(CodeSource cs) {
1314	>	return perms;
1315	>	}
1316	>	public PermissionCollection getPermissions(ProtectionDomain pd) {
1317	>	return perms;
1318	>	}
1319	>	public boolean implies(ProtectionDomain pd, Permission p) {
1320	>	return perms.implies(p);
1321	>	}
1322	>	public void refresh() {}
1323	>	public String toString() {
1324	>	List<Permission> ps = new ArrayList<>();
1325	>	for (Enumeration<Permission> e = perms.elements(); e.hasMoreElements();)
1326	>	ps.add(e.nextElement());
1327	>	return "AdjustablePolicy with permissions " + ps;
1328	>	}
1329		}
1330
1331	+	/**
1332	+	* Returns a policy containing all the permissions we ever need.
1333	+	*/
1334	+	public static Policy permissivePolicy() {
1335	+	return new AdjustablePolicy
1336	+	// Permissions j.u.c. needs directly
1337	+	(new RuntimePermission("modifyThread"),
1338	+	new RuntimePermission("getClassLoader"),
1339	+	new RuntimePermission("setContextClassLoader"),
1340	+	// Permissions needed to change permissions!
1341	+	new SecurityPermission("getPolicy"),
1342	+	new SecurityPermission("setPolicy"),
1343	+	new RuntimePermission("setSecurityManager"),
1344	+	// Permissions needed by the junit test harness
1345	+	new RuntimePermission("accessDeclaredMembers"),
1346	+	new PropertyPermission("*", "read"),
1347	+	new java.io.FilePermission("<<ALL FILES>>", "read"));
1348	+	}
1349
1350	<	// Some convenient Runnable classes
1350	>	/**
1351	>	* Sleeps until the given time has elapsed.
1352	>	* Throws AssertionError if interrupted.
1353	>	*/
1354	>	static void sleep(long millis) {
1355	>	try {
1356	>	delay(millis);
1357	>	} catch (InterruptedException fail) {
1358	>	throw new AssertionError("Unexpected InterruptedException", fail);
1359	>	}
1360	>	}
1361
1362	<	static class NoOpRunnable implements Runnable {
1363	<	public void run() {}
1362	>	/**
1363	>	* Spin-waits up to the specified number of milliseconds for the given
1364	>	* thread to enter a wait state: BLOCKED, WAITING, or TIMED_WAITING.
1365	>	* @param waitingForGodot if non-null, an additional condition to satisfy
1366	>	*/
1367	>	void waitForThreadToEnterWaitState(Thread thread, long timeoutMillis,
1368	>	Callable<Boolean> waitingForGodot) {
1369	>	for (long startTime = 0L;;) {
1370	>	switch (thread.getState()) {
1371	>	default: break;
1372	>	case BLOCKED: case WAITING: case TIMED_WAITING:
1373	>	try {
1374	>	if (waitingForGodot == null || waitingForGodot.call())
1375	>	return;
1376	>	} catch (Throwable fail) { threadUnexpectedException(fail); }
1377	>	break;
1378	>	case TERMINATED:
1379	>	fail("Unexpected thread termination");
1380	>	}
1381	>
1382	>	if (startTime == 0L)
1383	>	startTime = System.nanoTime();
1384	>	else if (millisElapsedSince(startTime) > timeoutMillis) {
1385	>	assertTrue(thread.isAlive());
1386	>	if (waitingForGodot == null
1387	>	|| thread.getState() == Thread.State.RUNNABLE)
1388	>	fail("timed out waiting for thread to enter wait state");
1389	>	else
1390	>	fail("timed out waiting for condition, thread state="
1391	>	+ thread.getState());
1392	>	}
1393	>	Thread.yield();
1394	>	}
1395		}
1396
1397	<	static class NoOpCallable implements Callable {
1398	<	public Object call() { return Boolean.TRUE; }
1397	>	/**
1398	>	* Spin-waits up to the specified number of milliseconds for the given
1399	>	* thread to enter a wait state: BLOCKED, WAITING, or TIMED_WAITING.
1400	>	*/
1401	>	void waitForThreadToEnterWaitState(Thread thread, long timeoutMillis) {
1402	>	waitForThreadToEnterWaitState(thread, timeoutMillis, null);
1403		}
1404
1405	<	static final String TEST_STRING = "a test string";
1405	>	/**
1406	>	* Spin-waits up to LONG_DELAY_MS milliseconds for the given thread to
1407	>	* enter a wait state: BLOCKED, WAITING, or TIMED_WAITING.
1408	>	*/
1409	>	void waitForThreadToEnterWaitState(Thread thread) {
1410	>	waitForThreadToEnterWaitState(thread, LONG_DELAY_MS, null);
1411	>	}
1412
1413	<	static class StringTask implements Callable<String> {
1414	<	public String call() { return TEST_STRING; }
1413	>	/**
1414	>	* Spin-waits up to LONG_DELAY_MS milliseconds for the given thread to
1415	>	* enter a wait state: BLOCKED, WAITING, or TIMED_WAITING,
1416	>	* and additionally satisfy the given condition.
1417	>	*/
1418	>	void waitForThreadToEnterWaitState(Thread thread,
1419	>	Callable<Boolean> waitingForGodot) {
1420	>	waitForThreadToEnterWaitState(thread, LONG_DELAY_MS, waitingForGodot);
1421		}
1422
1423	<	static class NPETask implements Callable<String> {
1424	<	public String call() { throw new NullPointerException(); }
1423	>	/**
1424	>	* Spin-waits up to LONG_DELAY_MS milliseconds for the current thread to
1425	>	* be interrupted.  Clears the interrupt status before returning.
1426	>	*/
1427	>	void awaitInterrupted() {
1428	>	for (long startTime = 0L; !Thread.interrupted(); ) {
1429	>	if (startTime == 0L)
1430	>	startTime = System.nanoTime();
1431	>	else if (millisElapsedSince(startTime) > LONG_DELAY_MS)
1432	>	fail("timed out waiting for thread interrupt");
1433	>	Thread.yield();
1434	>	}
1435		}
1436
1437	<	static class CallableOne implements Callable<Integer> {
1438	<	public Integer call() { return one; }
1437	>	/**
1438	>	* Returns the number of milliseconds since time given by
1439	>	* startNanoTime, which must have been previously returned from a
1440	>	* call to {@link System#nanoTime()}.
1441	>	*/
1442	>	static long millisElapsedSince(long startNanoTime) {
1443	>	return NANOSECONDS.toMillis(System.nanoTime() - startNanoTime);
1444		}
1445
1446	<	class ShortRunnable implements Runnable {
1447	<	public void run() {
1448	<	try {
1449	<	Thread.sleep(SHORT_DELAY_MS);
1450	<	}
1451	<	catch(Exception e) {
1452	<	threadUnexpectedException();
1453	<	}
1454	<	}
1446	>	/**
1447	>	* Checks that timed f.get() returns the expected value, and does not
1448	>	* wait for the timeout to elapse before returning.
1449	>	*/
1450	>	<T> void checkTimedGet(Future<T> f, T expectedValue, long timeoutMillis) {
1451	>	long startTime = System.nanoTime();
1452	>	T actual = null;
1453	>	try {
1454	>	actual = f.get(timeoutMillis, MILLISECONDS);
1455	>	} catch (Throwable fail) { threadUnexpectedException(fail); }
1456	>	assertEquals(expectedValue, actual);
1457	>	if (millisElapsedSince(startTime) > timeoutMillis/2)
1458	>	throw new AssertionError("timed get did not return promptly");
1459		}
1460
1461	<	class ShortInterruptedRunnable implements Runnable {
1462	<	public void run() {
1461	>	<T> void checkTimedGet(Future<T> f, T expectedValue) {
1462	>	checkTimedGet(f, expectedValue, LONG_DELAY_MS);
1463	>	}
1464	>
1465	>	/**
1466	>	* Returns a new started daemon Thread running the given runnable.
1467	>	*/
1468	>	Thread newStartedThread(Runnable runnable) {
1469	>	Thread t = new Thread(runnable);
1470	>	t.setDaemon(true);
1471	>	t.start();
1472	>	return t;
1473	>	}
1474	>
1475	>	/**
1476	>	* Returns a new started daemon Thread running the given action,
1477	>	* wrapped in a CheckedRunnable.
1478	>	*/
1479	>	Thread newStartedThread(Action action) {
1480	>	return newStartedThread(checkedRunnable(action));
1481	>	}
1482	>
1483	>	/**
1484	>	* Waits for the specified time (in milliseconds) for the thread
1485	>	* to terminate (using {@link Thread#join(long)}), else interrupts
1486	>	* the thread (in the hope that it may terminate later) and fails.
1487	>	*/
1488	>	void awaitTermination(Thread thread, long timeoutMillis) {
1489	>	try {
1490	>	thread.join(timeoutMillis);
1491	>	} catch (InterruptedException fail) {
1492	>	threadUnexpectedException(fail);
1493	>	}
1494	>	if (thread.getState() != Thread.State.TERMINATED) {
1495	>	String detail = String.format(
1496	>	"timed out waiting for thread to terminate, thread=%s, state=%s" ,
1497	>	thread, thread.getState());
1498		try {
1499	<	Thread.sleep(SHORT_DELAY_MS);
1500	<	threadShouldThrow();
1501	<	}
1502	<	catch(InterruptedException success) {
1499	>	threadFail(detail);
1500	>	} finally {
1501	>	// Interrupt thread __after__ having reported its stack trace
1502	>	thread.interrupt();
1503		}
1504		}
1505		}
1506
1507	<	class SmallRunnable implements Runnable {
1508	<	public void run() {
1507	>	/**
1508	>	* Waits for LONG_DELAY_MS milliseconds for the thread to
1509	>	* terminate (using {@link Thread#join(long)}), else interrupts
1510	>	* the thread (in the hope that it may terminate later) and fails.
1511	>	*/
1512	>	void awaitTermination(Thread t) {
1513	>	awaitTermination(t, LONG_DELAY_MS);
1514	>	}
1515	>
1516	>	// Some convenient Runnable classes
1517	>
1518	>	public abstract class CheckedRunnable implements Runnable {
1519	>	protected abstract void realRun() throws Throwable;
1520	>
1521	>	public final void run() {
1522		try {
1523	<	Thread.sleep(SMALL_DELAY_MS);
1524	<	}
1525	<	catch(Exception e) {
420	<	threadUnexpectedException();
1523	>	realRun();
1524	>	} catch (Throwable fail) {
1525	>	threadUnexpectedException(fail);
1526		}
1527		}
1528		}
1529
1530	<	class SmallPossiblyInterruptedRunnable implements Runnable {
1531	<	public void run() {
1530	>	Runnable checkedRunnable(Action action) {
1531	>	return new CheckedRunnable() {
1532	>	public void realRun() throws Throwable {
1533	>	action.run();
1534	>	}};
1535	>	}
1536	>
1537	>	public abstract class ThreadShouldThrow extends Thread {
1538	>	protected abstract void realRun() throws Throwable;
1539	>
1540	>	final Class<?> exceptionClass;
1541	>
1542	>	<T extends Throwable> ThreadShouldThrow(Class<T> exceptionClass) {
1543	>	this.exceptionClass = exceptionClass;
1544	>	}
1545	>
1546	>	public final void run() {
1547		try {
1548	<	Thread.sleep(SMALL_DELAY_MS);
1549	<	}
1550	<	catch(Exception e) {
1548	>	realRun();
1549	>	} catch (Throwable t) {
1550	>	if (! exceptionClass.isInstance(t))
1551	>	threadUnexpectedException(t);
1552	>	return;
1553		}
1554	+	threadShouldThrow(exceptionClass.getSimpleName());
1555		}
1556		}
1557
1558	<	class SmallCallable implements Callable {
1559	<	public Object call() {
1558	>	public abstract class CheckedInterruptedRunnable implements Runnable {
1559	>	protected abstract void realRun() throws Throwable;
1560	>
1561	>	public final void run() {
1562		try {
1563	<	Thread.sleep(SMALL_DELAY_MS);
1564	<	}
1565	<	catch(Exception e) {
1566	<	threadUnexpectedException();
1563	>	realRun();
1564	>	} catch (InterruptedException success) {
1565	>	threadAssertFalse(Thread.interrupted());
1566	>	return;
1567	>	} catch (Throwable fail) {
1568	>	threadUnexpectedException(fail);
1569		}
1570	<	return Boolean.TRUE;
1570	>	threadShouldThrow("InterruptedException");
1571		}
1572		}
1573
1574	<	class SmallInterruptedRunnable implements Runnable {
1575	<	public void run() {
1574	>	public abstract class CheckedCallable<T> implements Callable<T> {
1575	>	protected abstract T realCall() throws Throwable;
1576	>
1577	>	public final T call() {
1578		try {
1579	<	Thread.sleep(SMALL_DELAY_MS);
1580	<	threadShouldThrow();
1581	<	}
453	<	catch(InterruptedException success) {
1579	>	return realCall();
1580	>	} catch (Throwable fail) {
1581	>	threadUnexpectedException(fail);
1582		}
1583	+	throw new AssertionError("unreached");
1584		}
1585		}
1586
1587	+	public static class NoOpRunnable implements Runnable {
1588	+	public void run() {}
1589	+	}
1590	+
1591	+	public static class NoOpCallable implements Callable {
1592	+	public Object call() { return Boolean.TRUE; }
1593	+	}
1594
1595	<	class MediumRunnable implements Runnable {
1596	<	public void run() {
1597	<	try {
1598	<	Thread.sleep(MEDIUM_DELAY_MS);
1599	<	}
1600	<	catch(Exception e) {
1601	<	threadUnexpectedException();
1602	<	}
1595	>	public static final String TEST_STRING = "a test string";
1596	>
1597	>	public static class StringTask implements Callable<String> {
1598	>	final String value;
1599	>	public StringTask() { this(TEST_STRING); }
1600	>	public StringTask(String value) { this.value = value; }
1601	>	public String call() { return value; }
1602	>	}
1603	>
1604	>	public Callable<String> latchAwaitingStringTask(final CountDownLatch latch) {
1605	>	return new CheckedCallable<String>() {
1606	>	protected String realCall() {
1607	>	try {
1608	>	latch.await();
1609	>	} catch (InterruptedException quittingTime) {}
1610	>	return TEST_STRING;
1611	>	}};
1612	>	}
1613	>
1614	>	public Runnable countDowner(final CountDownLatch latch) {
1615	>	return new CheckedRunnable() {
1616	>	public void realRun() throws InterruptedException {
1617	>	latch.countDown();
1618	>	}};
1619	>	}
1620	>
1621	>	class LatchAwaiter extends CheckedRunnable {
1622	>	static final int NEW = 0;
1623	>	static final int RUNNING = 1;
1624	>	static final int DONE = 2;
1625	>	final CountDownLatch latch;
1626	>	int state = NEW;
1627	>	LatchAwaiter(CountDownLatch latch) { this.latch = latch; }
1628	>	public void realRun() throws InterruptedException {
1629	>	state = 1;
1630	>	await(latch);
1631	>	state = 2;
1632		}
1633		}
1634
1635	<	class MediumInterruptedRunnable implements Runnable {
1636	<	public void run() {
1637	<	try {
1638	<	Thread.sleep(MEDIUM_DELAY_MS);
1639	<	threadShouldThrow();
1640	<	}
1641	<	catch(InterruptedException success) {
1642	<	}
1635	>	public LatchAwaiter awaiter(CountDownLatch latch) {
1636	>	return new LatchAwaiter(latch);
1637	>	}
1638	>
1639	>	public void await(CountDownLatch latch, long timeoutMillis) {
1640	>	boolean timedOut = false;
1641	>	try {
1642	>	timedOut = !latch.await(timeoutMillis, MILLISECONDS);
1643	>	} catch (Throwable fail) {
1644	>	threadUnexpectedException(fail);
1645		}
1646	+	if (timedOut)
1647	+	fail("timed out waiting for CountDownLatch for "
1648	+	+ (timeoutMillis/1000) + " sec");
1649		}
1650
1651	<	class MediumPossiblyInterruptedRunnable implements Runnable {
1652	<	public void run() {
1653	<	try {
1654	<	Thread.sleep(MEDIUM_DELAY_MS);
1655	<	}
1656	<	catch(InterruptedException success) {
1657	<	}
1651	>	public void await(CountDownLatch latch) {
1652	>	await(latch, LONG_DELAY_MS);
1653	>	}
1654	>
1655	>	public void await(Semaphore semaphore) {
1656	>	boolean timedOut = false;
1657	>	try {
1658	>	timedOut = !semaphore.tryAcquire(LONG_DELAY_MS, MILLISECONDS);
1659	>	} catch (Throwable fail) {
1660	>	threadUnexpectedException(fail);
1661		}
1662	+	if (timedOut)
1663	+	fail("timed out waiting for Semaphore for "
1664	+	+ (LONG_DELAY_MS/1000) + " sec");
1665		}
1666
1667	<	class LongPossiblyInterruptedRunnable implements Runnable {
1668	<	public void run() {
1669	<	try {
1670	<	Thread.sleep(LONG_DELAY_MS);
1671	<	}
496	<	catch(InterruptedException success) {
497	<	}
1667	>	public void await(CyclicBarrier barrier) {
1668	>	try {
1669	>	barrier.await(LONG_DELAY_MS, MILLISECONDS);
1670	>	} catch (Throwable fail) {
1671	>	threadUnexpectedException(fail);
1672		}
1673		}
1674
1675	+	//     /**
1676	+	//      * Spin-waits up to LONG_DELAY_MS until flag becomes true.
1677	+	//      */
1678	+	//     public void await(AtomicBoolean flag) {
1679	+	//         await(flag, LONG_DELAY_MS);
1680	+	//     }
1681	+
1682	+	//     /**
1683	+	//      * Spin-waits up to the specified timeout until flag becomes true.
1684	+	//      */
1685	+	//     public void await(AtomicBoolean flag, long timeoutMillis) {
1686	+	//         long startTime = System.nanoTime();
1687	+	//         while (!flag.get()) {
1688	+	//             if (millisElapsedSince(startTime) > timeoutMillis)
1689	+	//                 throw new AssertionError("timed out");
1690	+	//             Thread.yield();
1691	+	//         }
1692	+	//     }
1693	+
1694	+	public static class NPETask implements Callable<String> {
1695	+	public String call() { throw new NullPointerException(); }
1696	+	}
1697	+
1698	+	public Runnable possiblyInterruptedRunnable(final long timeoutMillis) {
1699	+	return new CheckedRunnable() {
1700	+	protected void realRun() {
1701	+	try {
1702	+	delay(timeoutMillis);
1703	+	} catch (InterruptedException ok) {}
1704	+	}};
1705	+	}
1706	+
1707		/**
1708		* For use as ThreadFactory in constructors
1709		*/
1710	<	static class SimpleThreadFactory implements ThreadFactory{
1711	<	public Thread newThread(Runnable r){
1710	>	public static class SimpleThreadFactory implements ThreadFactory {
1711	>	public Thread newThread(Runnable r) {
1712		return new Thread(r);
1713	<	}
1713	>	}
1714	>	}
1715	>
1716	>	public interface TrackedRunnable extends Runnable {
1717	>	boolean isDone();
1718		}
1719
1720	<	static class TrackedShortRunnable implements Runnable {
1721	<	volatile boolean done = false;
1720	>	public static class TrackedNoOpRunnable implements Runnable {
1721	>	public volatile boolean done = false;
1722		public void run() {
1723	+	done = true;
1724	+	}
1725	+	}
1726	+
1727	+	/**
1728	+	* Analog of CheckedRunnable for RecursiveAction
1729	+	*/
1730	+	public abstract class CheckedRecursiveAction extends RecursiveAction {
1731	+	protected abstract void realCompute() throws Throwable;
1732	+
1733	+	@Override protected final void compute() {
1734		try {
1735	<	Thread.sleep(SMALL_DELAY_MS);
1736	<	done = true;
1737	<	} catch(Exception e){
1735	>	realCompute();
1736	>	} catch (Throwable fail) {
1737	>	threadUnexpectedException(fail);
1738		}
1739		}
1740		}
1741
1742	<	static class TrackedMediumRunnable implements Runnable {
1743	<	volatile boolean done = false;
1744	<	public void run() {
1742	>	/**
1743	>	* Analog of CheckedCallable for RecursiveTask
1744	>	*/
1745	>	public abstract class CheckedRecursiveTask<T> extends RecursiveTask<T> {
1746	>	protected abstract T realCompute() throws Throwable;
1747	>
1748	>	@Override protected final T compute() {
1749		try {
1750	<	Thread.sleep(MEDIUM_DELAY_MS);
1751	<	done = true;
1752	<	} catch(Exception e){
1750	>	return realCompute();
1751	>	} catch (Throwable fail) {
1752	>	threadUnexpectedException(fail);
1753		}
1754	+	throw new AssertionError("unreached");
1755		}
1756		}
1757
1758	<	static class TrackedLongRunnable implements Runnable {
1759	<	volatile boolean done = false;
1760	<	public void run() {
1758	>	/**
1759	>	* For use as RejectedExecutionHandler in constructors
1760	>	*/
1761	>	public static class NoOpREHandler implements RejectedExecutionHandler {
1762	>	public void rejectedExecution(Runnable r,
1763	>	ThreadPoolExecutor executor) {}
1764	>	}
1765	>
1766	>	/**
1767	>	* A CyclicBarrier that uses timed await and fails with
1768	>	* AssertionErrors instead of throwing checked exceptions.
1769	>	*/
1770	>	public static class CheckedBarrier extends CyclicBarrier {
1771	>	public CheckedBarrier(int parties) { super(parties); }
1772	>
1773	>	public int await() {
1774		try {
1775	<	Thread.sleep(LONG_DELAY_MS);
1776	<	done = true;
1777	<	} catch(Exception e){
1775	>	return super.await(2 * LONG_DELAY_MS, MILLISECONDS);
1776	>	} catch (TimeoutException timedOut) {
1777	>	throw new AssertionError("timed out");
1778	>	} catch (Exception fail) {
1779	>	throw new AssertionError("Unexpected exception: " + fail, fail);
1780		}
1781		}
1782		}
1783
1784	<	static class TrackedNoOpRunnable implements Runnable {
1785	<	volatile boolean done = false;
1786	<	public void run() {
1787	<	done = true;
1784	>	void checkEmpty(BlockingQueue q) {
1785	>	try {
1786	>	assertTrue(q.isEmpty());
1787	>	assertEquals(0, q.size());
1788	>	assertNull(q.peek());
1789	>	assertNull(q.poll());
1790	>	assertNull(q.poll(randomExpiredTimeout(), randomTimeUnit()));
1791	>	assertEquals(q.toString(), "[]");
1792	>	assertTrue(Arrays.equals(q.toArray(), new Object[0]));
1793	>	assertFalse(q.iterator().hasNext());
1794	>	try {
1795	>	q.element();
1796	>	shouldThrow();
1797	>	} catch (NoSuchElementException success) {}
1798	>	try {
1799	>	q.iterator().next();
1800	>	shouldThrow();
1801	>	} catch (NoSuchElementException success) {}
1802	>	try {
1803	>	q.remove();
1804	>	shouldThrow();
1805	>	} catch (NoSuchElementException success) {}
1806	>	} catch (InterruptedException fail) { threadUnexpectedException(fail); }
1807	>	}
1808	>
1809	>	void assertSerialEquals(Object x, Object y) {
1810	>	assertTrue(Arrays.equals(serialBytes(x), serialBytes(y)));
1811	>	}
1812	>
1813	>	void assertNotSerialEquals(Object x, Object y) {
1814	>	assertFalse(Arrays.equals(serialBytes(x), serialBytes(y)));
1815	>	}
1816	>
1817	>	byte[] serialBytes(Object o) {
1818	>	try {
1819	>	ByteArrayOutputStream bos = new ByteArrayOutputStream();
1820	>	ObjectOutputStream oos = new ObjectOutputStream(bos);
1821	>	oos.writeObject(o);
1822	>	oos.flush();
1823	>	oos.close();
1824	>	return bos.toByteArray();
1825	>	} catch (Throwable fail) {
1826	>	threadUnexpectedException(fail);
1827	>	return new byte[0];
1828	>	}
1829	>	}
1830	>
1831	>	void assertImmutable(Object o) {
1832	>	if (o instanceof Collection) {
1833	>	assertThrows(
1834	>	UnsupportedOperationException.class,
1835	>	() -> ((Collection) o).add(null));
1836		}
1837		}
1838
1839	<	static class TrackedCallable implements Callable {
1840	<	volatile boolean done = false;
1841	<	public Object call() {
1842	<	try {
1843	<	Thread.sleep(SMALL_DELAY_MS);
1844	<	done = true;
1845	<	} catch(Exception e){
1839	>	@SuppressWarnings("unchecked")
1840	>	<T> T serialClone(T o) {
1841	>	T clone = null;
1842	>	try {
1843	>	ObjectInputStream ois = new ObjectInputStream
1844	>	(new ByteArrayInputStream(serialBytes(o)));
1845	>	clone = (T) ois.readObject();
1846	>	} catch (Throwable fail) {
1847	>	threadUnexpectedException(fail);
1848	>	}
1849	>	if (o == clone) assertImmutable(o);
1850	>	else assertSame(o.getClass(), clone.getClass());
1851	>	return clone;
1852	>	}
1853	>
1854	>	/**
1855	>	* A version of serialClone that leaves error handling (for
1856	>	* e.g. NotSerializableException) up to the caller.
1857	>	*/
1858	>	@SuppressWarnings("unchecked")
1859	>	<T> T serialClonePossiblyFailing(T o)
1860	>	throws ReflectiveOperationException, java.io.IOException {
1861	>	ByteArrayOutputStream bos = new ByteArrayOutputStream();
1862	>	ObjectOutputStream oos = new ObjectOutputStream(bos);
1863	>	oos.writeObject(o);
1864	>	oos.flush();
1865	>	oos.close();
1866	>	ObjectInputStream ois = new ObjectInputStream
1867	>	(new ByteArrayInputStream(bos.toByteArray()));
1868	>	T clone = (T) ois.readObject();
1869	>	if (o == clone) assertImmutable(o);
1870	>	else assertSame(o.getClass(), clone.getClass());
1871	>	return clone;
1872	>	}
1873	>
1874	>	/**
1875	>	* If o implements Cloneable and has a public clone method,
1876	>	* returns a clone of o, else null.
1877	>	*/
1878	>	@SuppressWarnings("unchecked")
1879	>	<T> T cloneableClone(T o) {
1880	>	if (!(o instanceof Cloneable)) return null;
1881	>	final T clone;
1882	>	try {
1883	>	clone = (T) o.getClass().getMethod("clone").invoke(o);
1884	>	} catch (NoSuchMethodException ok) {
1885	>	return null;
1886	>	} catch (ReflectiveOperationException unexpected) {
1887	>	throw new Error(unexpected);
1888	>	}
1889	>	assertNotSame(o, clone); // not 100% guaranteed by spec
1890	>	assertSame(o.getClass(), clone.getClass());
1891	>	return clone;
1892	>	}
1893	>
1894	>	public void assertThrows(Class<? extends Throwable> expectedExceptionClass,
1895	>	Action... throwingActions) {
1896	>	for (Action throwingAction : throwingActions) {
1897	>	boolean threw = false;
1898	>	try { throwingAction.run(); }
1899	>	catch (Throwable t) {
1900	>	threw = true;
1901	>	if (!expectedExceptionClass.isInstance(t))
1902	>	throw new AssertionError(
1903	>	"Expected " + expectedExceptionClass.getName() +
1904	>	", got " + t.getClass().getName(),
1905	>	t);
1906		}
1907	<	return Boolean.TRUE;
1907	>	if (!threw)
1908	>	shouldThrow(expectedExceptionClass.getName());
1909		}
1910		}
1911
1912	+	public void assertIteratorExhausted(Iterator<?> it) {
1913	+	try {
1914	+	it.next();
1915	+	shouldThrow();
1916	+	} catch (NoSuchElementException success) {}
1917	+	assertFalse(it.hasNext());
1918	+	}
1919	+
1920	+	public <T> Callable<T> callableThrowing(final Exception ex) {
1921	+	return new Callable<T>() { public T call() throws Exception { throw ex; }};
1922	+	}
1923	+
1924	+	public Runnable runnableThrowing(final RuntimeException ex) {
1925	+	return new Runnable() { public void run() { throw ex; }};
1926	+	}
1927	+
1928	+	/** A reusable thread pool to be shared by tests. */
1929	+	static final ExecutorService cachedThreadPool =
1930	+	new ThreadPoolExecutor(0, Integer.MAX_VALUE,
1931	+	1000L, MILLISECONDS,
1932	+	new SynchronousQueue<Runnable>());
1933	+
1934	+	static <T> void shuffle(T[] array) {
1935	+	Collections.shuffle(Arrays.asList(array), ThreadLocalRandom.current());
1936	+	}
1937	+
1938	+	/**
1939	+	* Returns the same String as would be returned by {@link
1940	+	* Object#toString}, whether or not the given object's class
1941	+	* overrides toString().
1942	+	*
1943	+	* @see System#identityHashCode
1944	+	*/
1945	+	static String identityString(Object x) {
1946	+	return x.getClass().getName()
1947	+	+ "@" + Integer.toHexString(System.identityHashCode(x));
1948	+	}
1949	+
1950	+	// --- Shared assertions for Executor tests ---
1951
1952		/**
1953	<	* For use as RejectedExecutionHandler in constructors
1953	>	* Returns maximum number of tasks that can be submitted to given
1954	>	* pool (with bounded queue) before saturation (when submission
1955	>	* throws RejectedExecutionException).
1956	>	*/
1957	>	static final int saturatedSize(ThreadPoolExecutor pool) {
1958	>	BlockingQueue<Runnable> q = pool.getQueue();
1959	>	return pool.getMaximumPoolSize() + q.size() + q.remainingCapacity();
1960	>	}
1961	>
1962	>	@SuppressWarnings("FutureReturnValueIgnored")
1963	>	void assertNullTaskSubmissionThrowsNullPointerException(Executor e) {
1964	>	try {
1965	>	e.execute((Runnable) null);
1966	>	shouldThrow();
1967	>	} catch (NullPointerException success) {}
1968	>
1969	>	if (! (e instanceof ExecutorService)) return;
1970	>	ExecutorService es = (ExecutorService) e;
1971	>	try {
1972	>	es.submit((Runnable) null);
1973	>	shouldThrow();
1974	>	} catch (NullPointerException success) {}
1975	>	try {
1976	>	es.submit((Runnable) null, Boolean.TRUE);
1977	>	shouldThrow();
1978	>	} catch (NullPointerException success) {}
1979	>	try {
1980	>	es.submit((Callable) null);
1981	>	shouldThrow();
1982	>	} catch (NullPointerException success) {}
1983	>
1984	>	if (! (e instanceof ScheduledExecutorService)) return;
1985	>	ScheduledExecutorService ses = (ScheduledExecutorService) e;
1986	>	try {
1987	>	ses.schedule((Runnable) null,
1988	>	randomTimeout(), randomTimeUnit());
1989	>	shouldThrow();
1990	>	} catch (NullPointerException success) {}
1991	>	try {
1992	>	ses.schedule((Callable) null,
1993	>	randomTimeout(), randomTimeUnit());
1994	>	shouldThrow();
1995	>	} catch (NullPointerException success) {}
1996	>	try {
1997	>	ses.scheduleAtFixedRate((Runnable) null,
1998	>	randomTimeout(), LONG_DELAY_MS, MILLISECONDS);
1999	>	shouldThrow();
2000	>	} catch (NullPointerException success) {}
2001	>	try {
2002	>	ses.scheduleWithFixedDelay((Runnable) null,
2003	>	randomTimeout(), LONG_DELAY_MS, MILLISECONDS);
2004	>	shouldThrow();
2005	>	} catch (NullPointerException success) {}
2006	>	}
2007	>
2008	>	void setRejectedExecutionHandler(
2009	>	ThreadPoolExecutor p, RejectedExecutionHandler handler) {
2010	>	p.setRejectedExecutionHandler(handler);
2011	>	assertSame(handler, p.getRejectedExecutionHandler());
2012	>	}
2013	>
2014	>	void assertTaskSubmissionsAreRejected(ThreadPoolExecutor p) {
2015	>	final RejectedExecutionHandler savedHandler = p.getRejectedExecutionHandler();
2016	>	final long savedTaskCount = p.getTaskCount();
2017	>	final long savedCompletedTaskCount = p.getCompletedTaskCount();
2018	>	final int savedQueueSize = p.getQueue().size();
2019	>	final boolean stock = (p.getClass().getClassLoader() == null);
2020	>
2021	>	Runnable r = () -> {};
2022	>	Callable<Boolean> c = () -> Boolean.TRUE;
2023	>
2024	>	class Recorder implements RejectedExecutionHandler {
2025	>	public volatile Runnable r = null;
2026	>	public volatile ThreadPoolExecutor p = null;
2027	>	public void reset() { r = null; p = null; }
2028	>	public void rejectedExecution(Runnable r, ThreadPoolExecutor p) {
2029	>	assertNull(this.r);
2030	>	assertNull(this.p);
2031	>	this.r = r;
2032	>	this.p = p;
2033	>	}
2034	>	}
2035	>
2036	>	// check custom handler is invoked exactly once per task
2037	>	Recorder recorder = new Recorder();
2038	>	setRejectedExecutionHandler(p, recorder);
2039	>	for (int i = 2; i--> 0; ) {
2040	>	recorder.reset();
2041	>	p.execute(r);
2042	>	if (stock && p.getClass() == ThreadPoolExecutor.class)
2043	>	assertSame(r, recorder.r);
2044	>	assertSame(p, recorder.p);
2045	>
2046	>	recorder.reset();
2047	>	assertFalse(p.submit(r).isDone());
2048	>	if (stock) assertTrue(!((FutureTask) recorder.r).isDone());
2049	>	assertSame(p, recorder.p);
2050	>
2051	>	recorder.reset();
2052	>	assertFalse(p.submit(r, Boolean.TRUE).isDone());
2053	>	if (stock) assertTrue(!((FutureTask) recorder.r).isDone());
2054	>	assertSame(p, recorder.p);
2055	>
2056	>	recorder.reset();
2057	>	assertFalse(p.submit(c).isDone());
2058	>	if (stock) assertTrue(!((FutureTask) recorder.r).isDone());
2059	>	assertSame(p, recorder.p);
2060	>
2061	>	if (p instanceof ScheduledExecutorService) {
2062	>	ScheduledExecutorService s = (ScheduledExecutorService) p;
2063	>	ScheduledFuture<?> future;
2064	>
2065	>	recorder.reset();
2066	>	future = s.schedule(r, randomTimeout(), randomTimeUnit());
2067	>	assertFalse(future.isDone());
2068	>	if (stock) assertTrue(!((FutureTask) recorder.r).isDone());
2069	>	assertSame(p, recorder.p);
2070	>
2071	>	recorder.reset();
2072	>	future = s.schedule(c, randomTimeout(), randomTimeUnit());
2073	>	assertFalse(future.isDone());
2074	>	if (stock) assertTrue(!((FutureTask) recorder.r).isDone());
2075	>	assertSame(p, recorder.p);
2076	>
2077	>	recorder.reset();
2078	>	future = s.scheduleAtFixedRate(r, randomTimeout(), LONG_DELAY_MS, MILLISECONDS);
2079	>	assertFalse(future.isDone());
2080	>	if (stock) assertTrue(!((FutureTask) recorder.r).isDone());
2081	>	assertSame(p, recorder.p);
2082	>
2083	>	recorder.reset();
2084	>	future = s.scheduleWithFixedDelay(r, randomTimeout(), LONG_DELAY_MS, MILLISECONDS);
2085	>	assertFalse(future.isDone());
2086	>	if (stock) assertTrue(!((FutureTask) recorder.r).isDone());
2087	>	assertSame(p, recorder.p);
2088	>	}
2089	>	}
2090	>
2091	>	// Checking our custom handler above should be sufficient, but
2092	>	// we add some integration tests of standard handlers.
2093	>	final AtomicReference<Thread> thread = new AtomicReference<>();
2094	>	final Runnable setThread = () -> thread.set(Thread.currentThread());
2095	>
2096	>	setRejectedExecutionHandler(p, new ThreadPoolExecutor.AbortPolicy());
2097	>	try {
2098	>	p.execute(setThread);
2099	>	shouldThrow();
2100	>	} catch (RejectedExecutionException success) {}
2101	>	assertNull(thread.get());
2102	>
2103	>	setRejectedExecutionHandler(p, new ThreadPoolExecutor.DiscardPolicy());
2104	>	p.execute(setThread);
2105	>	assertNull(thread.get());
2106	>
2107	>	setRejectedExecutionHandler(p, new ThreadPoolExecutor.CallerRunsPolicy());
2108	>	p.execute(setThread);
2109	>	if (p.isShutdown())
2110	>	assertNull(thread.get());
2111	>	else
2112	>	assertSame(Thread.currentThread(), thread.get());
2113	>
2114	>	setRejectedExecutionHandler(p, savedHandler);
2115	>
2116	>	// check that pool was not perturbed by handlers
2117	>	assertEquals(savedTaskCount, p.getTaskCount());
2118	>	assertEquals(savedCompletedTaskCount, p.getCompletedTaskCount());
2119	>	assertEquals(savedQueueSize, p.getQueue().size());
2120	>	}
2121	>
2122	>	void assertCollectionsEquals(Collection<?> x, Collection<?> y) {
2123	>	assertEquals(x, y);
2124	>	assertEquals(y, x);
2125	>	assertEquals(x.isEmpty(), y.isEmpty());
2126	>	assertEquals(x.size(), y.size());
2127	>	if (x instanceof List) {
2128	>	assertEquals(x.toString(), y.toString());
2129	>	}
2130	>	if (x instanceof List || x instanceof Set) {
2131	>	assertEquals(x.hashCode(), y.hashCode());
2132	>	}
2133	>	if (x instanceof List || x instanceof Deque) {
2134	>	assertTrue(Arrays.equals(x.toArray(), y.toArray()));
2135	>	assertTrue(Arrays.equals(x.toArray(new Object[0]),
2136	>	y.toArray(new Object[0])));
2137	>	}
2138	>	}
2139	>
2140	>	/**
2141	>	* A weaker form of assertCollectionsEquals which does not insist
2142	>	* that the two collections satisfy Object#equals(Object), since
2143	>	* they may use identity semantics as Deques do.
2144		*/
2145	<	static class NoOpREHandler implements RejectedExecutionHandler{
2146	<	public void rejectedExecution(Runnable r, ThreadPoolExecutor executor){}
2145	>	void assertCollectionsEquivalent(Collection<?> x, Collection<?> y) {
2146	>	if (x instanceof List || x instanceof Set)
2147	>	assertCollectionsEquals(x, y);
2148	>	else {
2149	>	assertEquals(x.isEmpty(), y.isEmpty());
2150	>	assertEquals(x.size(), y.size());
2151	>	assertEquals(new HashSet(x), new HashSet(y));
2152	>	if (x instanceof Deque) {
2153	>	assertTrue(Arrays.equals(x.toArray(), y.toArray()));
2154	>	assertTrue(Arrays.equals(x.toArray(new Object[0]),
2155	>	y.toArray(new Object[0])));
2156	>	}
2157	>	}
2158		}
569	–
570	–
2159		}

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