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

Comparing jsr166/src/test/tck/JSR166TestCase.java (file contents):
Revision 1.39 by jsr166, Tue Nov 17 21:51:45 2009 UTC vs.
Revision 1.270 by jsr166, Sun Sep 29 20:18:35 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
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.*;
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 java.io.*;
45	<	import java.security.*;
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,
#	Line 23 | Line 118 | import java.security.*;
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
66	<	* isolation.</li>
168	>	* cover multiple methods when they cannot be tested in isolation.
169		*
170	<	* <li> The documentation style for testcases is to provide as javadoc
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	<	* Runs all JSR166 unit tests using junit.textui.TestRunner
199	>	* If true, also run tests that are not part of the official tck
200	>	* because they test unspecified implementation details.
201		*/
202	<	public static void main (String[] args) {
203	<	int iters = 1;
204	<	if (args.length > 0)
205	<	iters = Integer.parseInt(args[0]);
206	<	Test s = suite();
207	<	for (int i = 0; i < iters; ++i) {
208	<	junit.textui.TestRunner.run (s);
209	<	System.gc();
210	<	System.runFinalization();
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	>	* 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		}
103	–	System.exit(0);
388		}
389
390		/**
391	<	* Collects all JSR166 unit tests as one suite
391	>	* Returns a TestRunner that doesn't bother with unnecessary
392	>	* fluff, like printing a "." for each test case.
393		*/
394	<	public static Test suite ( ) {
395	<	TestSuite suite = new TestSuite("JSR166 Unit Tests");
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	<	suite.addTest(new TestSuite(ForkJoinPoolTest.class));
401	<	suite.addTest(new TestSuite(ForkJoinTaskTest.class));
402	<	suite.addTest(new TestSuite(RecursiveActionTest.class));
403	<	suite.addTest(new TestSuite(RecursiveTaskTest.class));
404	<	suite.addTest(new TestSuite(LinkedTransferQueueTest.class));
405	<	suite.addTest(new TestSuite(PhaserTest.class));
406	<	suite.addTest(new TestSuite(ThreadLocalRandomTest.class));
407	<	suite.addTest(new TestSuite(AbstractExecutorServiceTest.class));
408	<	suite.addTest(new TestSuite(AbstractQueueTest.class));
409	<	suite.addTest(new TestSuite(AbstractQueuedSynchronizerTest.class));
410	<	suite.addTest(new TestSuite(AbstractQueuedLongSynchronizerTest.class));
411	<	suite.addTest(new TestSuite(ArrayBlockingQueueTest.class));
412	<	suite.addTest(new TestSuite(ArrayDequeTest.class));
413	<	suite.addTest(new TestSuite(AtomicBooleanTest.class));
414	<	suite.addTest(new TestSuite(AtomicIntegerArrayTest.class));
415	<	suite.addTest(new TestSuite(AtomicIntegerFieldUpdaterTest.class));
416	<	suite.addTest(new TestSuite(AtomicIntegerTest.class));
417	<	suite.addTest(new TestSuite(AtomicLongArrayTest.class));
130	<	suite.addTest(new TestSuite(AtomicLongFieldUpdaterTest.class));
131	<	suite.addTest(new TestSuite(AtomicLongTest.class));
132	<	suite.addTest(new TestSuite(AtomicMarkableReferenceTest.class));
133	<	suite.addTest(new TestSuite(AtomicReferenceArrayTest.class));
134	<	suite.addTest(new TestSuite(AtomicReferenceFieldUpdaterTest.class));
135	<	suite.addTest(new TestSuite(AtomicReferenceTest.class));
136	<	suite.addTest(new TestSuite(AtomicStampedReferenceTest.class));
137	<	suite.addTest(new TestSuite(ConcurrentHashMapTest.class));
138	<	suite.addTest(new TestSuite(ConcurrentLinkedQueueTest.class));
139	<	suite.addTest(new TestSuite(ConcurrentSkipListMapTest.class));
140	<	suite.addTest(new TestSuite(ConcurrentSkipListSubMapTest.class));
141	<	suite.addTest(new TestSuite(ConcurrentSkipListSetTest.class));
142	<	suite.addTest(new TestSuite(ConcurrentSkipListSubSetTest.class));
143	<	suite.addTest(new TestSuite(CopyOnWriteArrayListTest.class));
144	<	suite.addTest(new TestSuite(CopyOnWriteArraySetTest.class));
145	<	suite.addTest(new TestSuite(CountDownLatchTest.class));
146	<	suite.addTest(new TestSuite(CyclicBarrierTest.class));
147	<	suite.addTest(new TestSuite(DelayQueueTest.class));
148	<	suite.addTest(new TestSuite(EntryTest.class));
149	<	suite.addTest(new TestSuite(ExchangerTest.class));
150	<	suite.addTest(new TestSuite(ExecutorsTest.class));
151	<	suite.addTest(new TestSuite(ExecutorCompletionServiceTest.class));
152	<	suite.addTest(new TestSuite(FutureTaskTest.class));
153	<	suite.addTest(new TestSuite(LinkedBlockingDequeTest.class));
154	<	suite.addTest(new TestSuite(LinkedBlockingQueueTest.class));
155	<	suite.addTest(new TestSuite(LinkedListTest.class));
156	<	suite.addTest(new TestSuite(LockSupportTest.class));
157	<	suite.addTest(new TestSuite(PriorityBlockingQueueTest.class));
158	<	suite.addTest(new TestSuite(PriorityQueueTest.class));
159	<	suite.addTest(new TestSuite(ReentrantLockTest.class));
160	<	suite.addTest(new TestSuite(ReentrantReadWriteLockTest.class));
161	<	suite.addTest(new TestSuite(ScheduledExecutorTest.class));
162	<	suite.addTest(new TestSuite(ScheduledExecutorSubclassTest.class));
163	<	suite.addTest(new TestSuite(SemaphoreTest.class));
164	<	suite.addTest(new TestSuite(SynchronousQueueTest.class));
165	<	suite.addTest(new TestSuite(SystemTest.class));
166	<	suite.addTest(new TestSuite(ThreadLocalTest.class));
167	<	suite.addTest(new TestSuite(ThreadPoolExecutorTest.class));
168	<	suite.addTest(new TestSuite(ThreadPoolExecutorSubclassTest.class));
169	<	suite.addTest(new TestSuite(ThreadTest.class));
170	<	suite.addTest(new TestSuite(TimeUnitTest.class));
171	<	suite.addTest(new TestSuite(TreeMapTest.class));
172	<	suite.addTest(new TestSuite(TreeSetTest.class));
173	<	suite.addTest(new TestSuite(TreeSubMapTest.class));
174	<	suite.addTest(new TestSuite(TreeSubSetTest.class));
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	>	}
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	+	// 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	+	* Returns a timeout for use when any value at all will do.
684	+	*/
685	+	static long randomTimeout() { return RANDOM_TIMEOUT; }
686
687		/**
688	<	* Returns the shortest timed delay. This could
188	<	* be reimplemented to use for example a Property.
688	>	* Returns a timeout that means "no waiting", i.e. not positive.
689		*/
690	<	protected long getShortDelay() {
691	<	return 50;
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(List<T> choices) {
708	>	return choices.get(ThreadLocalRandom.current().nextInt(choices.size()));
709		}
710
711	+	/**
712	+	* Returns a random element from given choices.
713	+	*/
714	+	<T> T chooseRandomly(T... choices) {
715	+	return choices[ThreadLocalRandom.current().nextInt(choices.length)];
716	+	}
717	+
718	+	/**
719	+	* Returns the shortest timed delay. This can be scaled up for
720	+	* slow machines using the jsr166.delay.factor system property,
721	+	* or via jtreg's -timeoutFactor: flag.
722	+	* http://openjdk.java.net/jtreg/command-help.html
723	+	*/
724	+	protected long getShortDelay() {
725	+	return (long) (50 * delayFactor);
726	+	}
727
728		/**
729		* Sets delays as multiples of SHORT_DELAY.
730		*/
731	<	protected  void setDelays() {
731	>	protected void setDelays() {
732		SHORT_DELAY_MS = getShortDelay();
733	<	SMALL_DELAY_MS = SHORT_DELAY_MS * 5;
733	>	SMALL_DELAY_MS  = SHORT_DELAY_MS * 5;
734		MEDIUM_DELAY_MS = SHORT_DELAY_MS * 10;
735	<	LONG_DELAY_MS = SHORT_DELAY_MS * 50;
735	>	LONG_DELAY_MS   = SHORT_DELAY_MS * 200;
736	>	LONGER_DELAY_MS = 2 * LONG_DELAY_MS;
737		}
738
739	+	private static final long TIMEOUT_DELAY_MS
740	+	= (long) (12.0 * Math.cbrt(delayFactor));
741	+
742		/**
743	<	* Flag set true if any threadAssert methods fail
743	>	* Returns a timeout in milliseconds to be used in tests that verify
744	>	* that operations block or time out.  We want this to be longer
745	>	* than the OS scheduling quantum, but not too long, so don't scale
746	>	* linearly with delayFactor; we use "crazy" cube root instead.
747		*/
748	<	volatile boolean threadFailed;
748	>	static long timeoutMillis() {
749	>	return TIMEOUT_DELAY_MS;
750	>	}
751
752		/**
753	<	* Initializes test to indicate that no thread assertions have failed
753	>	* Returns a new Date instance representing a time at least
754	>	* delayMillis milliseconds in the future.
755		*/
756	+	Date delayedDate(long delayMillis) {
757	+	// Add 1 because currentTimeMillis is known to round into the past.
758	+	return new Date(System.currentTimeMillis() + delayMillis + 1);
759	+	}
760	+
761	+	/**
762	+	* The first exception encountered if any threadAssertXXX method fails.
763	+	*/
764	+	private final AtomicReference<Throwable> threadFailure
765	+	= new AtomicReference<>(null);
766	+
767	+	/**
768	+	* Records an exception so that it can be rethrown later in the test
769	+	* harness thread, triggering a test case failure.  Only the first
770	+	* failure is recorded; subsequent calls to this method from within
771	+	* the same test have no effect.
772	+	*/
773	+	public void threadRecordFailure(Throwable t) {
774	+	System.err.println(t);
775	+	if (threadFailure.compareAndSet(null, t))
776	+	dumpTestThreads();
777	+	}
778	+
779		public void setUp() {
780		setDelays();
781	<	threadFailed = false;
781	>	}
782	>
783	>	void tearDownFail(String format, Object... args) {
784	>	String msg = toString() + ": " + String.format(format, args);
785	>	System.err.println(msg);
786	>	dumpTestThreads();
787	>	throw new AssertionError(msg);
788		}
789
790		/**
791	<	* Triggers test case failure if any thread assertions have failed
792	<	*/
793	<	public void tearDown() {
794	<	assertFalse(threadFailed);
791	>	* Extra checks that get done for all test cases.
792	>	*
793	>	* Triggers test case failure if any thread assertions have failed,
794	>	* by rethrowing, in the test harness thread, any exception recorded
795	>	* earlier by threadRecordFailure.
796	>	*
797	>	* Triggers test case failure if interrupt status is set in the main thread.
798	>	*/
799	>	public void tearDown() throws Exception {
800	>	Throwable t = threadFailure.getAndSet(null);
801	>	if (t != null) {
802	>	if (t instanceof Error)
803	>	throw (Error) t;
804	>	else if (t instanceof RuntimeException)
805	>	throw (RuntimeException) t;
806	>	else if (t instanceof Exception)
807	>	throw (Exception) t;
808	>	else
809	>	throw new AssertionError(t.toString(), t);
810	>	}
811	>
812	>	if (Thread.interrupted())
813	>	tearDownFail("interrupt status set in main thread");
814	>
815	>	checkForkJoinPoolThreadLeaks();
816	>	}
817	>
818	>	/**
819	>	* Finds missing PoolCleaners
820	>	*/
821	>	void checkForkJoinPoolThreadLeaks() throws InterruptedException {
822	>	Thread[] survivors = new Thread[7];
823	>	int count = Thread.enumerate(survivors);
824	>	for (int i = 0; i < count; i++) {
825	>	Thread thread = survivors[i];
826	>	String name = thread.getName();
827	>	if (name.startsWith("ForkJoinPool-")) {
828	>	// give thread some time to terminate
829	>	thread.join(LONG_DELAY_MS);
830	>	if (thread.isAlive())
831	>	tearDownFail("Found leaked ForkJoinPool thread thread=%s",
832	>	thread);
833	>	}
834	>	}
835	>
836	>	if (!ForkJoinPool.commonPool()
837	>	.awaitQuiescence(LONG_DELAY_MS, MILLISECONDS))
838	>	tearDownFail("ForkJoin common pool thread stuck");
839		}
840
841		/**
842	<	* Fail, also setting status to indicate current testcase should fail
842	>	* Just like fail(reason), but additionally recording (using
843	>	* threadRecordFailure) any AssertionError thrown, so that the
844	>	* current testcase will fail.
845		*/
846		public void threadFail(String reason) {
847	<	threadFailed = true;
848	<	fail(reason);
847	>	try {
848	>	fail(reason);
849	>	} catch (AssertionError fail) {
850	>	threadRecordFailure(fail);
851	>	throw fail;
852	>	}
853		}
854
855		/**
856	<	* If expression not true, set status to indicate current testcase
857	<	* should fail
856	>	* Just like assertTrue(b), but additionally recording (using
857	>	* threadRecordFailure) any AssertionError thrown, so that the
858	>	* current testcase will fail.
859		*/
860		public void threadAssertTrue(boolean b) {
861	<	if (!b) {
239	<	threadFailed = true;
861	>	try {
862		assertTrue(b);
863	+	} catch (AssertionError fail) {
864	+	threadRecordFailure(fail);
865	+	throw fail;
866		}
867		}
868
869		/**
870	<	* If expression not false, set status to indicate current testcase
871	<	* should fail
870	>	* Just like assertFalse(b), but additionally recording (using
871	>	* threadRecordFailure) any AssertionError thrown, so that the
872	>	* current testcase will fail.
873		*/
874		public void threadAssertFalse(boolean b) {
875	<	if (b) {
250	<	threadFailed = true;
875	>	try {
876		assertFalse(b);
877	+	} catch (AssertionError fail) {
878	+	threadRecordFailure(fail);
879	+	throw fail;
880		}
881		}
882
883		/**
884	<	* If argument not null, set status to indicate current testcase
885	<	* should fail
884	>	* Just like assertNull(x), but additionally recording (using
885	>	* threadRecordFailure) any AssertionError thrown, so that the
886	>	* current testcase will fail.
887		*/
888		public void threadAssertNull(Object x) {
889	<	if (x != null) {
261	<	threadFailed = true;
889	>	try {
890		assertNull(x);
891	+	} catch (AssertionError fail) {
892	+	threadRecordFailure(fail);
893	+	throw fail;
894		}
895		}
896
897		/**
898	<	* If arguments not equal, set status to indicate current testcase
899	<	* should fail
898	>	* Just like assertEquals(x, y), but additionally recording (using
899	>	* threadRecordFailure) any AssertionError thrown, so that the
900	>	* current testcase will fail.
901		*/
902		public void threadAssertEquals(long x, long y) {
903	<	if (x != y) {
272	<	threadFailed = true;
903	>	try {
904		assertEquals(x, y);
905	+	} catch (AssertionError fail) {
906	+	threadRecordFailure(fail);
907	+	throw fail;
908		}
909		}
910
911		/**
912	<	* If arguments not equal, set status to indicate current testcase
913	<	* should fail
912	>	* Just like assertEquals(x, y), but additionally recording (using
913	>	* threadRecordFailure) any AssertionError thrown, so that the
914	>	* current testcase will fail.
915		*/
916		public void threadAssertEquals(Object x, Object y) {
917	<	if (x != y && (x == null || !x.equals(y))) {
283	<	threadFailed = true;
917	>	try {
918		assertEquals(x, y);
919	+	} catch (AssertionError fail) {
920	+	threadRecordFailure(fail);
921	+	throw fail;
922	+	} catch (Throwable fail) {
923	+	threadUnexpectedException(fail);
924		}
925		}
926
927		/**
928	<	* threadFail with message "should throw exception"
928	>	* Just like assertSame(x, y), but additionally recording (using
929	>	* threadRecordFailure) any AssertionError thrown, so that the
930	>	* current testcase will fail.
931	>	*/
932	>	public void threadAssertSame(Object x, Object y) {
933	>	try {
934	>	assertSame(x, y);
935	>	} catch (AssertionError fail) {
936	>	threadRecordFailure(fail);
937	>	throw fail;
938	>	}
939	>	}
940	>
941	>	/**
942	>	* Calls threadFail with message "should throw exception".
943		*/
944		public void threadShouldThrow() {
945	<	threadFailed = true;
946	<	fail("should throw exception");
945	>	threadFail("should throw exception");
946	>	}
947	>
948	>	/**
949	>	* Calls threadFail with message "should throw" + exceptionName.
950	>	*/
951	>	public void threadShouldThrow(String exceptionName) {
952	>	threadFail("should throw " + exceptionName);
953		}
954
955		/**
956	<	* threadFail with message "Unexpected exception"
956	>	* Records the given exception using {@link #threadRecordFailure},
957	>	* then rethrows the exception, wrapping it in an AssertionError
958	>	* if necessary.
959		*/
960	<	public void threadUnexpectedException() {
961	<	threadFailed = true;
962	<	fail("Unexpected exception");
960	>	public void threadUnexpectedException(Throwable t) {
961	>	threadRecordFailure(t);
962	>	t.printStackTrace();
963	>	if (t instanceof RuntimeException)
964	>	throw (RuntimeException) t;
965	>	else if (t instanceof Error)
966	>	throw (Error) t;
967	>	else
968	>	throw new AssertionError("unexpected exception: " + t, t);
969		}
970
971		/**
972	<	* threadFail with message "Unexpected exception", with argument
972	>	* Delays, via Thread.sleep, for the given millisecond delay, but
973	>	* if the sleep is shorter than specified, may re-sleep or yield
974	>	* until time elapses.  Ensures that the given time, as measured
975	>	* by System.nanoTime(), has elapsed.
976		*/
977	<	public void threadUnexpectedException(Throwable ex) {
978	<	threadFailed = true;
979	<	ex.printStackTrace();
980	<	fail("Unexpected exception: " + ex);
977	>	static void delay(long millis) throws InterruptedException {
978	>	long nanos = millis * (1000 * 1000);
979	>	final long wakeupTime = System.nanoTime() + nanos;
980	>	do {
981	>	if (millis > 0L)
982	>	Thread.sleep(millis);
983	>	else // too short to sleep
984	>	Thread.yield();
985	>	nanos = wakeupTime - System.nanoTime();
986	>	millis = nanos / (1000 * 1000);
987	>	} while (nanos >= 0L);
988		}
989
990		/**
991	<	* Wait out termination of a thread pool or fail doing so
991	>	* Allows use of try-with-resources with per-test thread pools.
992		*/
993	<	public void joinPool(ExecutorService exec) {
993	>	class PoolCleaner implements AutoCloseable {
994	>	private final ExecutorService pool;
995	>	public PoolCleaner(ExecutorService pool) { this.pool = pool; }
996	>	public void close() { joinPool(pool); }
997	>	}
998	>
999	>	/**
1000	>	* An extension of PoolCleaner that has an action to release the pool.
1001	>	*/
1002	>	class PoolCleanerWithReleaser extends PoolCleaner {
1003	>	private final Runnable releaser;
1004	>	public PoolCleanerWithReleaser(ExecutorService pool, Runnable releaser) {
1005	>	super(pool);
1006	>	this.releaser = releaser;
1007	>	}
1008	>	public void close() {
1009	>	try {
1010	>	releaser.run();
1011	>	} finally {
1012	>	super.close();
1013	>	}
1014	>	}
1015	>	}
1016	>
1017	>	PoolCleaner cleaner(ExecutorService pool) {
1018	>	return new PoolCleaner(pool);
1019	>	}
1020	>
1021	>	PoolCleaner cleaner(ExecutorService pool, Runnable releaser) {
1022	>	return new PoolCleanerWithReleaser(pool, releaser);
1023	>	}
1024	>
1025	>	PoolCleaner cleaner(ExecutorService pool, CountDownLatch latch) {
1026	>	return new PoolCleanerWithReleaser(pool, releaser(latch));
1027	>	}
1028	>
1029	>	Runnable releaser(final CountDownLatch latch) {
1030	>	return new Runnable() { public void run() {
1031	>	do { latch.countDown(); }
1032	>	while (latch.getCount() > 0);
1033	>	}};
1034	>	}
1035	>
1036	>	PoolCleaner cleaner(ExecutorService pool, AtomicBoolean flag) {
1037	>	return new PoolCleanerWithReleaser(pool, releaser(flag));
1038	>	}
1039	>
1040	>	Runnable releaser(final AtomicBoolean flag) {
1041	>	return new Runnable() { public void run() { flag.set(true); }};
1042	>	}
1043	>
1044	>	/**
1045	>	* Waits out termination of a thread pool or fails doing so.
1046	>	*/
1047	>	void joinPool(ExecutorService pool) {
1048		try {
1049	<	exec.shutdown();
1050	<	assertTrue(exec.awaitTermination(LONG_DELAY_MS, MILLISECONDS));
1049	>	pool.shutdown();
1050	>	if (!pool.awaitTermination(2 * LONG_DELAY_MS, MILLISECONDS)) {
1051	>	try {
1052	>	threadFail("ExecutorService " + pool +
1053	>	" did not terminate in a timely manner");
1054	>	} finally {
1055	>	// last resort, for the benefit of subsequent tests
1056	>	pool.shutdownNow();
1057	>	pool.awaitTermination(MEDIUM_DELAY_MS, MILLISECONDS);
1058	>	}
1059	>	}
1060		} catch (SecurityException ok) {
1061		// Allowed in case test doesn't have privs
1062	<	} catch (InterruptedException ie) {
1063	<	fail("Unexpected exception");
1062	>	} catch (InterruptedException fail) {
1063	>	threadFail("Unexpected InterruptedException");
1064		}
1065		}
1066
1067	+	/**
1068	+	* Like Runnable, but with the freedom to throw anything.
1069	+	* junit folks had the same idea:
1070	+	* http://junit.org/junit5/docs/snapshot/api/org/junit/gen5/api/Executable.html
1071	+	*/
1072	+	interface Action { public void run() throws Throwable; }
1073	+
1074	+	/**
1075	+	* Runs all the given actions in parallel, failing if any fail.
1076	+	* Useful for running multiple variants of tests that are
1077	+	* necessarily individually slow because they must block.
1078	+	*/
1079	+	void testInParallel(Action ... actions) {
1080	+	ExecutorService pool = Executors.newCachedThreadPool();
1081	+	try (PoolCleaner cleaner = cleaner(pool)) {
1082	+	ArrayList<Future<?>> futures = new ArrayList<>(actions.length);
1083	+	for (final Action action : actions)
1084	+	futures.add(pool.submit(new CheckedRunnable() {
1085	+	public void realRun() throws Throwable { action.run();}}));
1086	+	for (Future<?> future : futures)
1087	+	try {
1088	+	assertNull(future.get(LONG_DELAY_MS, MILLISECONDS));
1089	+	} catch (ExecutionException ex) {
1090	+	threadUnexpectedException(ex.getCause());
1091	+	} catch (Exception ex) {
1092	+	threadUnexpectedException(ex);
1093	+	}
1094	+	}
1095	+	}
1096	+
1097	+	/** Returns true if thread info might be useful in a thread dump. */
1098	+	static boolean threadOfInterest(ThreadInfo info) {
1099	+	final String name = info.getThreadName();
1100	+	String lockName;
1101	+	if (name == null)
1102	+	return true;
1103	+	if (name.equals("Signal Dispatcher")
1104	+	|| name.equals("WedgedTestDetector"))
1105	+	return false;
1106	+	if (name.equals("Reference Handler")) {
1107	+	// Reference Handler stacktrace changed in JDK-8156500
1108	+	StackTraceElement[] stackTrace; String methodName;
1109	+	if ((stackTrace = info.getStackTrace()) != null
1110	+	&& stackTrace.length > 0
1111	+	&& (methodName = stackTrace[0].getMethodName()) != null
1112	+	&& methodName.equals("waitForReferencePendingList"))
1113	+	return false;
1114	+	// jdk8 Reference Handler stacktrace
1115	+	if ((lockName = info.getLockName()) != null
1116	+	&& lockName.startsWith("java.lang.ref"))
1117	+	return false;
1118	+	}
1119	+	if ((name.equals("Finalizer") || name.equals("Common-Cleaner"))
1120	+	&& (lockName = info.getLockName()) != null
1121	+	&& lockName.startsWith("java.lang.ref"))
1122	+	return false;
1123	+	if (name.startsWith("ForkJoinPool.commonPool-worker")
1124	+	&& (lockName = info.getLockName()) != null
1125	+	&& lockName.startsWith("java.util.concurrent.ForkJoinPool"))
1126	+	return false;
1127	+	return true;
1128	+	}
1129	+
1130	+	/**
1131	+	* A debugging tool to print stack traces of most threads, as jstack does.
1132	+	* Uninteresting threads are filtered out.
1133	+	*/
1134	+	static void dumpTestThreads() {
1135	+	SecurityManager sm = System.getSecurityManager();
1136	+	if (sm != null) {
1137	+	try {
1138	+	System.setSecurityManager(null);
1139	+	} catch (SecurityException giveUp) {
1140	+	return;
1141	+	}
1142	+	}
1143	+
1144	+	System.err.println("------ stacktrace dump start ------");
1145	+	for (ThreadInfo info : THREAD_MXBEAN.dumpAllThreads(true, true))
1146	+	if (threadOfInterest(info))
1147	+	System.err.print(info);
1148	+	System.err.println("------ stacktrace dump end ------");
1149	+
1150	+	if (sm != null) System.setSecurityManager(sm);
1151	+	}
1152
1153		/**
1154	<	* fail with message "should throw exception"
1154	>	* Checks that thread eventually enters the expected blocked thread state.
1155		*/
1156	<	public void shouldThrow() {
1157	<	fail("Should throw exception");
1156	>	void assertThreadBlocks(Thread thread, Thread.State expected) {
1157	>	// always sleep at least 1 ms, with high probability avoiding
1158	>	// transitory states
1159	>	for (long retries = LONG_DELAY_MS * 3 / 4; retries-->0; ) {
1160	>	try { delay(1); }
1161	>	catch (InterruptedException fail) {
1162	>	throw new AssertionError("Unexpected InterruptedException", fail);
1163	>	}
1164	>	Thread.State s = thread.getState();
1165	>	if (s == expected)
1166	>	return;
1167	>	else if (s == Thread.State.TERMINATED)
1168	>	fail("Unexpected thread termination");
1169	>	}
1170	>	fail("timed out waiting for thread to enter thread state " + expected);
1171	>	}
1172	>
1173	>	/**
1174	>	* Returns the thread's blocker's class name, if any, else null.
1175	>	*/
1176	>	String blockerClassName(Thread thread) {
1177	>	ThreadInfo threadInfo; LockInfo lockInfo;
1178	>	if ((threadInfo = THREAD_MXBEAN.getThreadInfo(thread.getId(), 0)) != null
1179	>	&& (lockInfo = threadInfo.getLockInfo()) != null)
1180	>	return lockInfo.getClassName();
1181	>	return null;
1182		}
1183
1184		/**
1185	<	* fail with message "Unexpected exception"
1185	>	* Checks that future.get times out, with the default timeout of
1186	>	* {@code timeoutMillis()}.
1187		*/
1188	<	public void unexpectedException() {
1189	<	fail("Unexpected exception");
1188	>	void assertFutureTimesOut(Future future) {
1189	>	assertFutureTimesOut(future, timeoutMillis());
1190		}
1191
1192		/**
1193	<	* fail with message "Unexpected exception", with argument
1193	>	* Checks that future.get times out, with the given millisecond timeout.
1194		*/
1195	<	public void unexpectedException(Throwable ex) {
1196	<	ex.printStackTrace();
1197	<	fail("Unexpected exception: " + ex);
1195	>	void assertFutureTimesOut(Future future, long timeoutMillis) {
1196	>	long startTime = System.nanoTime();
1197	>	try {
1198	>	future.get(timeoutMillis, MILLISECONDS);
1199	>	shouldThrow();
1200	>	} catch (TimeoutException success) {
1201	>	} catch (Exception fail) {
1202	>	threadUnexpectedException(fail);
1203	>	} finally { future.cancel(true); }
1204	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
1205	>	}
1206	>
1207	>	/**
1208	>	* Fails with message "should throw exception".
1209	>	*/
1210	>	public void shouldThrow() {
1211	>	fail("Should throw exception");
1212		}
1213
1214	+	/**
1215	+	* Fails with message "should throw " + exceptionName.
1216	+	*/
1217	+	public void shouldThrow(String exceptionName) {
1218	+	fail("Should throw " + exceptionName);
1219	+	}
1220	+
1221	+	/**
1222	+	* The maximum number of consecutive spurious wakeups we should
1223	+	* tolerate (from APIs like LockSupport.park) before failing a test.
1224	+	*/
1225	+	static final int MAX_SPURIOUS_WAKEUPS = 10;
1226
1227		/**
1228		* The number of elements to place in collections, arrays, etc.
1229		*/
1230	<	static final int SIZE = 20;
1230	>	public static final int SIZE = 20;
1231
1232		// Some convenient Integer constants
1233
1234	<	static final Integer zero = new Integer(0);
1235	<	static final Integer one = new Integer(1);
1236	<	static final Integer two = new Integer(2);
1237	<	static final Integer three  = new Integer(3);
1238	<	static final Integer four  = new Integer(4);
1239	<	static final Integer five  = new Integer(5);
1240	<	static final Integer six = new Integer(6);
1241	<	static final Integer seven = new Integer(7);
1242	<	static final Integer eight = new Integer(8);
1243	<	static final Integer nine = new Integer(9);
1244	<	static final Integer m1  = new Integer(-1);
1245	<	static final Integer m2  = new Integer(-2);
1246	<	static final Integer m3  = new Integer(-3);
1247	<	static final Integer m4 = new Integer(-4);
1248	<	static final Integer m5 = new Integer(-5);
1249	<	static final Integer m6 = new Integer(-6);
1250	<	static final Integer m10 = new Integer(-10);
1234	>	public static final Integer zero  = new Integer(0);
1235	>	public static final Integer one   = new Integer(1);
1236	>	public static final Integer two   = new Integer(2);
1237	>	public static final Integer three = new Integer(3);
1238	>	public static final Integer four  = new Integer(4);
1239	>	public static final Integer five  = new Integer(5);
1240	>	public static final Integer six   = new Integer(6);
1241	>	public static final Integer seven = new Integer(7);
1242	>	public static final Integer eight = new Integer(8);
1243	>	public static final Integer nine  = new Integer(9);
1244	>	public static final Integer m1  = new Integer(-1);
1245	>	public static final Integer m2  = new Integer(-2);
1246	>	public static final Integer m3  = new Integer(-3);
1247	>	public static final Integer m4  = new Integer(-4);
1248	>	public static final Integer m5  = new Integer(-5);
1249	>	public static final Integer m6  = new Integer(-6);
1250	>	public static final Integer m10 = new Integer(-10);
1251	>
1252	>	/**
1253	>	* Runs Runnable r with a security policy that permits precisely
1254	>	* the specified permissions.  If there is no current security
1255	>	* manager, the runnable is run twice, both with and without a
1256	>	* security manager.  We require that any security manager permit
1257	>	* getPolicy/setPolicy.
1258	>	*/
1259	>	public void runWithPermissions(Runnable r, Permission... permissions) {
1260	>	SecurityManager sm = System.getSecurityManager();
1261	>	if (sm == null) {
1262	>	r.run();
1263	>	}
1264	>	runWithSecurityManagerWithPermissions(r, permissions);
1265	>	}
1266	>
1267	>	/**
1268	>	* Runs Runnable r with a security policy that permits precisely
1269	>	* the specified permissions.  If there is no current security
1270	>	* manager, a temporary one is set for the duration of the
1271	>	* Runnable.  We require that any security manager permit
1272	>	* getPolicy/setPolicy.
1273	>	*/
1274	>	public void runWithSecurityManagerWithPermissions(Runnable r,
1275	>	Permission... permissions) {
1276	>	SecurityManager sm = System.getSecurityManager();
1277	>	if (sm == null) {
1278	>	Policy savedPolicy = Policy.getPolicy();
1279	>	try {
1280	>	Policy.setPolicy(permissivePolicy());
1281	>	System.setSecurityManager(new SecurityManager());
1282	>	runWithSecurityManagerWithPermissions(r, permissions);
1283	>	} finally {
1284	>	System.setSecurityManager(null);
1285	>	Policy.setPolicy(savedPolicy);
1286	>	}
1287	>	} else {
1288	>	Policy savedPolicy = Policy.getPolicy();
1289	>	AdjustablePolicy policy = new AdjustablePolicy(permissions);
1290	>	Policy.setPolicy(policy);
1291	>
1292	>	try {
1293	>	r.run();
1294	>	} finally {
1295	>	policy.addPermission(new SecurityPermission("setPolicy"));
1296	>	Policy.setPolicy(savedPolicy);
1297	>	}
1298	>	}
1299	>	}
1300
1301	+	/**
1302	+	* Runs a runnable without any permissions.
1303	+	*/
1304	+	public void runWithoutPermissions(Runnable r) {
1305	+	runWithPermissions(r);
1306	+	}
1307
1308		/**
1309		* A security policy where new permissions can be dynamically added
1310		* or all cleared.
1311		*/
1312	<	static class AdjustablePolicy extends java.security.Policy {
1312	>	public static class AdjustablePolicy extends java.security.Policy {
1313		Permissions perms = new Permissions();
1314	<	AdjustablePolicy() { }
1314	>	AdjustablePolicy(Permission... permissions) {
1315	>	for (Permission permission : permissions)
1316	>	perms.add(permission);
1317	>	}
1318		void addPermission(Permission perm) { perms.add(perm); }
1319		void clearPermissions() { perms = new Permissions(); }
1320	<	public PermissionCollection getPermissions(CodeSource cs) {
1321	<	return perms;
1322	<	}
1323	<	public PermissionCollection getPermissions(ProtectionDomain pd) {
1324	<	return perms;
1325	<	}
1326	<	public boolean implies(ProtectionDomain pd, Permission p) {
1327	<	return perms.implies(p);
1328	<	}
1329	<	public void refresh() {}
1320	>	public PermissionCollection getPermissions(CodeSource cs) {
1321	>	return perms;
1322	>	}
1323	>	public PermissionCollection getPermissions(ProtectionDomain pd) {
1324	>	return perms;
1325	>	}
1326	>	public boolean implies(ProtectionDomain pd, Permission p) {
1327	>	return perms.implies(p);
1328	>	}
1329	>	public void refresh() {}
1330	>	public String toString() {
1331	>	List<Permission> ps = new ArrayList<>();
1332	>	for (Enumeration<Permission> e = perms.elements(); e.hasMoreElements();)
1333	>	ps.add(e.nextElement());
1334	>	return "AdjustablePolicy with permissions " + ps;
1335	>	}
1336	>	}
1337	>
1338	>	/**
1339	>	* Returns a policy containing all the permissions we ever need.
1340	>	*/
1341	>	public static Policy permissivePolicy() {
1342	>	return new AdjustablePolicy
1343	>	// Permissions j.u.c. needs directly
1344	>	(new RuntimePermission("modifyThread"),
1345	>	new RuntimePermission("getClassLoader"),
1346	>	new RuntimePermission("setContextClassLoader"),
1347	>	// Permissions needed to change permissions!
1348	>	new SecurityPermission("getPolicy"),
1349	>	new SecurityPermission("setPolicy"),
1350	>	new RuntimePermission("setSecurityManager"),
1351	>	// Permissions needed by the junit test harness
1352	>	new RuntimePermission("accessDeclaredMembers"),
1353	>	new PropertyPermission("*", "read"),
1354	>	new java.io.FilePermission("<<ALL FILES>>", "read"));
1355		}
1356
1357		/**
1358	<	* Sleep until the timeout has elapsed, or interrupted.
1359	<	* Does <em>NOT</em> throw InterruptedException.
1358	>	* Sleeps until the given time has elapsed.
1359	>	* Throws AssertionError if interrupted.
1360		*/
1361	<	void sleepTillInterrupted(long timeoutMillis) {
1361	>	static void sleep(long millis) {
1362		try {
1363	<	Thread.sleep(timeoutMillis);
1364	<	} catch (InterruptedException wakeup) {
1363	>	delay(millis);
1364	>	} catch (InterruptedException fail) {
1365	>	throw new AssertionError("Unexpected InterruptedException", fail);
1366		}
1367		}
1368
1369		/**
1370	<	* Returns a new started Thread running the given runnable.
1370	>	* Spin-waits up to the specified number of milliseconds for the given
1371	>	* thread to enter a wait state: BLOCKED, WAITING, or TIMED_WAITING.
1372	>	* @param waitingForGodot if non-null, an additional condition to satisfy
1373	>	*/
1374	>	void waitForThreadToEnterWaitState(Thread thread, long timeoutMillis,
1375	>	Callable<Boolean> waitingForGodot) {
1376	>	for (long startTime = 0L;;) {
1377	>	switch (thread.getState()) {
1378	>	default: break;
1379	>	case BLOCKED: case WAITING: case TIMED_WAITING:
1380	>	try {
1381	>	if (waitingForGodot == null || waitingForGodot.call())
1382	>	return;
1383	>	} catch (Throwable fail) { threadUnexpectedException(fail); }
1384	>	break;
1385	>	case TERMINATED:
1386	>	fail("Unexpected thread termination");
1387	>	}
1388	>
1389	>	if (startTime == 0L)
1390	>	startTime = System.nanoTime();
1391	>	else if (millisElapsedSince(startTime) > timeoutMillis) {
1392	>	assertTrue(thread.isAlive());
1393	>	if (waitingForGodot == null
1394	>	|| thread.getState() == Thread.State.RUNNABLE)
1395	>	fail("timed out waiting for thread to enter wait state");
1396	>	else
1397	>	fail("timed out waiting for condition, thread state="
1398	>	+ thread.getState());
1399	>	}
1400	>	Thread.yield();
1401	>	}
1402	>	}
1403	>
1404	>	/**
1405	>	* Spin-waits up to the specified number of milliseconds for the given
1406	>	* thread to enter a wait state: BLOCKED, WAITING, or TIMED_WAITING.
1407	>	*/
1408	>	void waitForThreadToEnterWaitState(Thread thread, long timeoutMillis) {
1409	>	waitForThreadToEnterWaitState(thread, timeoutMillis, null);
1410	>	}
1411	>
1412	>	/**
1413	>	* Spin-waits up to LONG_DELAY_MS milliseconds for the given thread to
1414	>	* enter a wait state: BLOCKED, WAITING, or TIMED_WAITING.
1415	>	*/
1416	>	void waitForThreadToEnterWaitState(Thread thread) {
1417	>	waitForThreadToEnterWaitState(thread, LONG_DELAY_MS, null);
1418	>	}
1419	>
1420	>	/**
1421	>	* Spin-waits up to LONG_DELAY_MS milliseconds for the given thread to
1422	>	* enter a wait state: BLOCKED, WAITING, or TIMED_WAITING,
1423	>	* and additionally satisfy the given condition.
1424	>	*/
1425	>	void waitForThreadToEnterWaitState(Thread thread,
1426	>	Callable<Boolean> waitingForGodot) {
1427	>	waitForThreadToEnterWaitState(thread, LONG_DELAY_MS, waitingForGodot);
1428	>	}
1429	>
1430	>	/**
1431	>	* Spin-waits up to LONG_DELAY_MS milliseconds for the current thread to
1432	>	* be interrupted.  Clears the interrupt status before returning.
1433	>	*/
1434	>	void awaitInterrupted() {
1435	>	for (long startTime = 0L; !Thread.interrupted(); ) {
1436	>	if (startTime == 0L)
1437	>	startTime = System.nanoTime();
1438	>	else if (millisElapsedSince(startTime) > LONG_DELAY_MS)
1439	>	fail("timed out waiting for thread interrupt");
1440	>	Thread.yield();
1441	>	}
1442	>	}
1443	>
1444	>	/**
1445	>	* Returns the number of milliseconds since time given by
1446	>	* startNanoTime, which must have been previously returned from a
1447	>	* call to {@link System#nanoTime()}.
1448	>	*/
1449	>	static long millisElapsedSince(long startNanoTime) {
1450	>	return NANOSECONDS.toMillis(System.nanoTime() - startNanoTime);
1451	>	}
1452	>
1453	>	/**
1454	>	* Checks that timed f.get() returns the expected value, and does not
1455	>	* wait for the timeout to elapse before returning.
1456	>	*/
1457	>	<T> void checkTimedGet(Future<T> f, T expectedValue, long timeoutMillis) {
1458	>	long startTime = System.nanoTime();
1459	>	T actual = null;
1460	>	try {
1461	>	actual = f.get(timeoutMillis, MILLISECONDS);
1462	>	} catch (Throwable fail) { threadUnexpectedException(fail); }
1463	>	assertEquals(expectedValue, actual);
1464	>	if (millisElapsedSince(startTime) > timeoutMillis/2)
1465	>	throw new AssertionError("timed get did not return promptly");
1466	>	}
1467	>
1468	>	<T> void checkTimedGet(Future<T> f, T expectedValue) {
1469	>	checkTimedGet(f, expectedValue, LONG_DELAY_MS);
1470	>	}
1471	>
1472	>	/**
1473	>	* Returns a new started daemon Thread running the given runnable.
1474		*/
1475		Thread newStartedThread(Runnable runnable) {
1476		Thread t = new Thread(runnable);
1477	+	t.setDaemon(true);
1478		t.start();
1479		return t;
1480		}
1481
1482	+	/**
1483	+	* Returns a new started daemon Thread running the given action,
1484	+	* wrapped in a CheckedRunnable.
1485	+	*/
1486	+	Thread newStartedThread(Action action) {
1487	+	return newStartedThread(checkedRunnable(action));
1488	+	}
1489	+
1490	+	/**
1491	+	* Waits for the specified time (in milliseconds) for the thread
1492	+	* to terminate (using {@link Thread#join(long)}), else interrupts
1493	+	* the thread (in the hope that it may terminate later) and fails.
1494	+	*/
1495	+	void awaitTermination(Thread thread, long timeoutMillis) {
1496	+	try {
1497	+	thread.join(timeoutMillis);
1498	+	} catch (InterruptedException fail) {
1499	+	threadUnexpectedException(fail);
1500	+	}
1501	+	if (thread.getState() != Thread.State.TERMINATED) {
1502	+	String detail = String.format(
1503	+	"timed out waiting for thread to terminate, thread=%s, state=%s" ,
1504	+	thread, thread.getState());
1505	+	try {
1506	+	threadFail(detail);
1507	+	} finally {
1508	+	// Interrupt thread __after__ having reported its stack trace
1509	+	thread.interrupt();
1510	+	}
1511	+	}
1512	+	}
1513	+
1514	+	/**
1515	+	* Waits for LONG_DELAY_MS milliseconds for the thread to
1516	+	* terminate (using {@link Thread#join(long)}), else interrupts
1517	+	* the thread (in the hope that it may terminate later) and fails.
1518	+	*/
1519	+	void awaitTermination(Thread t) {
1520	+	awaitTermination(t, LONG_DELAY_MS);
1521	+	}
1522	+
1523		// Some convenient Runnable classes
1524
1525	<	abstract class CheckedRunnable implements Runnable {
1526	<	abstract void realRun() throws Throwable;
1525	>	public abstract class CheckedRunnable implements Runnable {
1526	>	protected abstract void realRun() throws Throwable;
1527	>
1528	>	public final void run() {
1529	>	try {
1530	>	realRun();
1531	>	} catch (Throwable fail) {
1532	>	threadUnexpectedException(fail);
1533	>	}
1534	>	}
1535	>	}
1536	>
1537	>	Runnable checkedRunnable(Action action) {
1538	>	return new CheckedRunnable() {
1539	>	public void realRun() throws Throwable {
1540	>	action.run();
1541	>	}};
1542	>	}
1543	>
1544	>	public abstract class ThreadShouldThrow extends Thread {
1545	>	protected abstract void realRun() throws Throwable;
1546	>
1547	>	final Class<?> exceptionClass;
1548	>
1549	>	<T extends Throwable> ThreadShouldThrow(Class<T> exceptionClass) {
1550	>	this.exceptionClass = exceptionClass;
1551	>	}
1552
1553		public final void run() {
1554		try {
1555		realRun();
1556		} catch (Throwable t) {
1557	<	threadUnexpectedException(t);
1557	>	if (! exceptionClass.isInstance(t))
1558	>	threadUnexpectedException(t);
1559	>	return;
1560		}
1561	+	threadShouldThrow(exceptionClass.getSimpleName());
1562		}
1563		}
1564
1565	<	abstract class CheckedInterruptedRunnable implements Runnable {
1566	<	abstract void realRun() throws Throwable;
1565	>	public abstract class CheckedInterruptedRunnable implements Runnable {
1566	>	protected abstract void realRun() throws Throwable;
1567
1568		public final void run() {
1569		try {
1570		realRun();
438	–	threadShouldThrow();
1571		} catch (InterruptedException success) {
1572	<	} catch (Throwable t) {
1573	<	threadUnexpectedException(t);
1572	>	threadAssertFalse(Thread.interrupted());
1573	>	return;
1574	>	} catch (Throwable fail) {
1575	>	threadUnexpectedException(fail);
1576		}
1577	+	threadShouldThrow("InterruptedException");
1578		}
1579		}
1580
1581	<	abstract class CheckedCallable<T> implements Callable<T> {
1582	<	abstract T realCall() throws Throwable;
1581	>	public abstract class CheckedCallable<T> implements Callable<T> {
1582	>	protected abstract T realCall() throws Throwable;
1583
1584		public final T call() {
1585		try {
1586		return realCall();
1587	<	} catch (Throwable t) {
1588	<	threadUnexpectedException(t);
454	<	return null;
1587	>	} catch (Throwable fail) {
1588	>	threadUnexpectedException(fail);
1589		}
1590	+	throw new AssertionError("unreached");
1591		}
1592		}
1593
1594	<	static class NoOpRunnable implements Runnable {
1594	>	public static class NoOpRunnable implements Runnable {
1595		public void run() {}
1596		}
1597
1598	<	static class NoOpCallable implements Callable {
1598	>	public static class NoOpCallable implements Callable {
1599		public Object call() { return Boolean.TRUE; }
1600		}
1601
1602	<	static final String TEST_STRING = "a test string";
1602	>	public static final String TEST_STRING = "a test string";
1603
1604	<	static class StringTask implements Callable<String> {
1605	<	public String call() { return TEST_STRING; }
1604	>	public static class StringTask implements Callable<String> {
1605	>	final String value;
1606	>	public StringTask() { this(TEST_STRING); }
1607	>	public StringTask(String value) { this.value = value; }
1608	>	public String call() { return value; }
1609		}
1610
1611	<	static class NPETask implements Callable<String> {
1612	<	public String call() { throw new NullPointerException(); }
1611	>	public Callable<String> latchAwaitingStringTask(final CountDownLatch latch) {
1612	>	return new CheckedCallable<String>() {
1613	>	protected String realCall() {
1614	>	try {
1615	>	latch.await();
1616	>	} catch (InterruptedException quittingTime) {}
1617	>	return TEST_STRING;
1618	>	}};
1619		}
1620
1621	<	static class CallableOne implements Callable<Integer> {
1622	<	public Integer call() { return one; }
1621	>	public Runnable countDowner(final CountDownLatch latch) {
1622	>	return new CheckedRunnable() {
1623	>	public void realRun() throws InterruptedException {
1624	>	latch.countDown();
1625	>	}};
1626		}
1627
1628	<	class ShortRunnable extends CheckedRunnable {
1629	<	void realRun() throws Throwable {
1630	<	Thread.sleep(SHORT_DELAY_MS);
1628	>	class LatchAwaiter extends CheckedRunnable {
1629	>	static final int NEW = 0;
1630	>	static final int RUNNING = 1;
1631	>	static final int DONE = 2;
1632	>	final CountDownLatch latch;
1633	>	int state = NEW;
1634	>	LatchAwaiter(CountDownLatch latch) { this.latch = latch; }
1635	>	public void realRun() throws InterruptedException {
1636	>	state = 1;
1637	>	await(latch);
1638	>	state = 2;
1639		}
1640		}
1641
1642	<	class ShortInterruptedRunnable extends CheckedInterruptedRunnable {
1643	<	void realRun() throws InterruptedException {
489	<	Thread.sleep(SHORT_DELAY_MS);
490	<	}
1642	>	public LatchAwaiter awaiter(CountDownLatch latch) {
1643	>	return new LatchAwaiter(latch);
1644		}
1645
1646	<	class SmallRunnable extends CheckedRunnable {
1647	<	void realRun() throws Throwable {
1648	<	Thread.sleep(SMALL_DELAY_MS);
1646	>	public void await(CountDownLatch latch, long timeoutMillis) {
1647	>	boolean timedOut = false;
1648	>	try {
1649	>	timedOut = !latch.await(timeoutMillis, MILLISECONDS);
1650	>	} catch (Throwable fail) {
1651	>	threadUnexpectedException(fail);
1652		}
1653	+	if (timedOut)
1654	+	fail("timed out waiting for CountDownLatch for "
1655	+	+ (timeoutMillis/1000) + " sec");
1656		}
1657
1658	<	class SmallPossiblyInterruptedRunnable extends CheckedRunnable {
1659	<	void realRun() {
501	<	try {
502	<	Thread.sleep(SMALL_DELAY_MS);
503	<	}
504	<	catch (InterruptedException ok) {
505	<	}
506	<	}
1658	>	public void await(CountDownLatch latch) {
1659	>	await(latch, LONG_DELAY_MS);
1660		}
1661
1662	<	class SmallCallable extends CheckedCallable {
1663	<	Object realCall() throws Throwable {
1664	<	Thread.sleep(SMALL_DELAY_MS);
1665	<	return Boolean.TRUE;
1662	>	public void await(Semaphore semaphore) {
1663	>	boolean timedOut = false;
1664	>	try {
1665	>	timedOut = !semaphore.tryAcquire(LONG_DELAY_MS, MILLISECONDS);
1666	>	} catch (Throwable fail) {
1667	>	threadUnexpectedException(fail);
1668		}
1669	+	if (timedOut)
1670	+	fail("timed out waiting for Semaphore for "
1671	+	+ (LONG_DELAY_MS/1000) + " sec");
1672		}
1673
1674	<	class SmallInterruptedRunnable extends CheckedInterruptedRunnable {
1675	<	void realRun() throws InterruptedException {
1676	<	Thread.sleep(SMALL_DELAY_MS);
1674	>	public void await(CyclicBarrier barrier) {
1675	>	try {
1676	>	barrier.await(LONG_DELAY_MS, MILLISECONDS);
1677	>	} catch (Throwable fail) {
1678	>	threadUnexpectedException(fail);
1679		}
1680		}
1681
1682	<	class MediumRunnable extends CheckedRunnable {
1683	<	void realRun() throws Throwable {
1684	<	Thread.sleep(MEDIUM_DELAY_MS);
1682	>	//     /**
1683	>	//      * Spin-waits up to LONG_DELAY_MS until flag becomes true.
1684	>	//      */
1685	>	//     public void await(AtomicBoolean flag) {
1686	>	//         await(flag, LONG_DELAY_MS);
1687	>	//     }
1688	>
1689	>	//     /**
1690	>	//      * Spin-waits up to the specified timeout until flag becomes true.
1691	>	//      */
1692	>	//     public void await(AtomicBoolean flag, long timeoutMillis) {
1693	>	//         long startTime = System.nanoTime();
1694	>	//         while (!flag.get()) {
1695	>	//             if (millisElapsedSince(startTime) > timeoutMillis)
1696	>	//                 throw new AssertionError("timed out");
1697	>	//             Thread.yield();
1698	>	//         }
1699	>	//     }
1700	>
1701	>	public static class NPETask implements Callable<String> {
1702	>	public String call() { throw new NullPointerException(); }
1703	>	}
1704	>
1705	>	public Runnable possiblyInterruptedRunnable(final long timeoutMillis) {
1706	>	return new CheckedRunnable() {
1707	>	protected void realRun() {
1708	>	try {
1709	>	delay(timeoutMillis);
1710	>	} catch (InterruptedException ok) {}
1711	>	}};
1712	>	}
1713	>
1714	>	/**
1715	>	* For use as ThreadFactory in constructors
1716	>	*/
1717	>	public static class SimpleThreadFactory implements ThreadFactory {
1718	>	public Thread newThread(Runnable r) {
1719	>	return new Thread(r);
1720		}
1721		}
1722
1723	<	class MediumInterruptedRunnable extends CheckedInterruptedRunnable {
1724	<	void realRun() throws InterruptedException {
1725	<	Thread.sleep(MEDIUM_DELAY_MS);
1723	>	public interface TrackedRunnable extends Runnable {
1724	>	boolean isDone();
1725	>	}
1726	>
1727	>	public static class TrackedNoOpRunnable implements Runnable {
1728	>	public volatile boolean done = false;
1729	>	public void run() {
1730	>	done = true;
1731		}
1732		}
1733
1734	<	class MediumPossiblyInterruptedRunnable extends CheckedRunnable {
1735	<	void realRun() {
1734	>	/**
1735	>	* Analog of CheckedRunnable for RecursiveAction
1736	>	*/
1737	>	public abstract class CheckedRecursiveAction extends RecursiveAction {
1738	>	protected abstract void realCompute() throws Throwable;
1739	>
1740	>	@Override protected final void compute() {
1741		try {
1742	<	Thread.sleep(MEDIUM_DELAY_MS);
1743	<	}
1744	<	catch (InterruptedException ok) {
1742	>	realCompute();
1743	>	} catch (Throwable fail) {
1744	>	threadUnexpectedException(fail);
1745		}
1746		}
1747		}
1748
1749	<	class LongPossiblyInterruptedRunnable extends CheckedRunnable {
1750	<	void realRun() {
1749	>	/**
1750	>	* Analog of CheckedCallable for RecursiveTask
1751	>	*/
1752	>	public abstract class CheckedRecursiveTask<T> extends RecursiveTask<T> {
1753	>	protected abstract T realCompute() throws Throwable;
1754	>
1755	>	@Override protected final T compute() {
1756		try {
1757	<	Thread.sleep(LONG_DELAY_MS);
1758	<	}
1759	<	catch (InterruptedException ok) {
1757	>	return realCompute();
1758	>	} catch (Throwable fail) {
1759	>	threadUnexpectedException(fail);
1760		}
1761	+	throw new AssertionError("unreached");
1762		}
1763		}
1764
1765		/**
1766	<	* For use as ThreadFactory in constructors
1766	>	* For use as RejectedExecutionHandler in constructors
1767		*/
1768	<	static class SimpleThreadFactory implements ThreadFactory {
1769	<	public Thread newThread(Runnable r) {
1770	<	return new Thread(r);
560	<	}
1768	>	public static class NoOpREHandler implements RejectedExecutionHandler {
1769	>	public void rejectedExecution(Runnable r,
1770	>	ThreadPoolExecutor executor) {}
1771		}
1772
1773	<	static class TrackedShortRunnable implements Runnable {
1774	<	volatile boolean done = false;
1775	<	public void run() {
1773	>	/**
1774	>	* A CyclicBarrier that uses timed await and fails with
1775	>	* AssertionErrors instead of throwing checked exceptions.
1776	>	*/
1777	>	public static class CheckedBarrier extends CyclicBarrier {
1778	>	public CheckedBarrier(int parties) { super(parties); }
1779	>
1780	>	public int await() {
1781		try {
1782	<	Thread.sleep(SMALL_DELAY_MS);
1783	<	done = true;
1784	<	} catch (InterruptedException ok) {
1782	>	return super.await(LONGER_DELAY_MS, MILLISECONDS);
1783	>	} catch (TimeoutException timedOut) {
1784	>	throw new AssertionError("timed out");
1785	>	} catch (Exception fail) {
1786	>	throw new AssertionError("Unexpected exception: " + fail, fail);
1787		}
1788		}
1789		}
1790
1791	<	static class TrackedMediumRunnable implements Runnable {
1792	<	volatile boolean done = false;
1793	<	public void run() {
1791	>	void checkEmpty(BlockingQueue q) {
1792	>	try {
1793	>	assertTrue(q.isEmpty());
1794	>	assertEquals(0, q.size());
1795	>	assertNull(q.peek());
1796	>	assertNull(q.poll());
1797	>	assertNull(q.poll(randomExpiredTimeout(), randomTimeUnit()));
1798	>	assertEquals(q.toString(), "[]");
1799	>	assertTrue(Arrays.equals(q.toArray(), new Object[0]));
1800	>	assertFalse(q.iterator().hasNext());
1801		try {
1802	<	Thread.sleep(MEDIUM_DELAY_MS);
1803	<	done = true;
1804	<	} catch (InterruptedException ok) {
1805	<	}
1806	<	}
1802	>	q.element();
1803	>	shouldThrow();
1804	>	} catch (NoSuchElementException success) {}
1805	>	try {
1806	>	q.iterator().next();
1807	>	shouldThrow();
1808	>	} catch (NoSuchElementException success) {}
1809	>	try {
1810	>	q.remove();
1811	>	shouldThrow();
1812	>	} catch (NoSuchElementException success) {}
1813	>	} catch (InterruptedException fail) { threadUnexpectedException(fail); }
1814		}
1815
1816	<	static class TrackedLongRunnable implements Runnable {
1817	<	volatile boolean done = false;
1818	<	public void run() {
1819	<	try {
1820	<	Thread.sleep(LONG_DELAY_MS);
1821	<	done = true;
1822	<	} catch (InterruptedException ok) {
1823	<	}
1816	>	void assertSerialEquals(Object x, Object y) {
1817	>	assertTrue(Arrays.equals(serialBytes(x), serialBytes(y)));
1818	>	}
1819	>
1820	>	void assertNotSerialEquals(Object x, Object y) {
1821	>	assertFalse(Arrays.equals(serialBytes(x), serialBytes(y)));
1822	>	}
1823	>
1824	>	byte[] serialBytes(Object o) {
1825	>	try {
1826	>	ByteArrayOutputStream bos = new ByteArrayOutputStream();
1827	>	ObjectOutputStream oos = new ObjectOutputStream(bos);
1828	>	oos.writeObject(o);
1829	>	oos.flush();
1830	>	oos.close();
1831	>	return bos.toByteArray();
1832	>	} catch (Throwable fail) {
1833	>	threadUnexpectedException(fail);
1834	>	return new byte[0];
1835		}
1836		}
1837
1838	<	static class TrackedNoOpRunnable implements Runnable {
1839	<	volatile boolean done = false;
1840	<	public void run() {
1841	<	done = true;
1838	>	void assertImmutable(Object o) {
1839	>	if (o instanceof Collection) {
1840	>	assertThrows(
1841	>	UnsupportedOperationException.class,
1842	>	() -> ((Collection) o).add(null));
1843		}
1844		}
1845
1846	<	static class TrackedCallable implements Callable {
1847	<	volatile boolean done = false;
1848	<	public Object call() {
1849	<	try {
1850	<	Thread.sleep(SMALL_DELAY_MS);
1851	<	done = true;
1852	<	} catch (InterruptedException ok) {
1846	>	@SuppressWarnings("unchecked")
1847	>	<T> T serialClone(T o) {
1848	>	T clone = null;
1849	>	try {
1850	>	ObjectInputStream ois = new ObjectInputStream
1851	>	(new ByteArrayInputStream(serialBytes(o)));
1852	>	clone = (T) ois.readObject();
1853	>	} catch (Throwable fail) {
1854	>	threadUnexpectedException(fail);
1855	>	}
1856	>	if (o == clone) assertImmutable(o);
1857	>	else assertSame(o.getClass(), clone.getClass());
1858	>	return clone;
1859	>	}
1860	>
1861	>	/**
1862	>	* A version of serialClone that leaves error handling (for
1863	>	* e.g. NotSerializableException) up to the caller.
1864	>	*/
1865	>	@SuppressWarnings("unchecked")
1866	>	<T> T serialClonePossiblyFailing(T o)
1867	>	throws ReflectiveOperationException, java.io.IOException {
1868	>	ByteArrayOutputStream bos = new ByteArrayOutputStream();
1869	>	ObjectOutputStream oos = new ObjectOutputStream(bos);
1870	>	oos.writeObject(o);
1871	>	oos.flush();
1872	>	oos.close();
1873	>	ObjectInputStream ois = new ObjectInputStream
1874	>	(new ByteArrayInputStream(bos.toByteArray()));
1875	>	T clone = (T) ois.readObject();
1876	>	if (o == clone) assertImmutable(o);
1877	>	else assertSame(o.getClass(), clone.getClass());
1878	>	return clone;
1879	>	}
1880	>
1881	>	/**
1882	>	* If o implements Cloneable and has a public clone method,
1883	>	* returns a clone of o, else null.
1884	>	*/
1885	>	@SuppressWarnings("unchecked")
1886	>	<T> T cloneableClone(T o) {
1887	>	if (!(o instanceof Cloneable)) return null;
1888	>	final T clone;
1889	>	try {
1890	>	clone = (T) o.getClass().getMethod("clone").invoke(o);
1891	>	} catch (NoSuchMethodException ok) {
1892	>	return null;
1893	>	} catch (ReflectiveOperationException unexpected) {
1894	>	throw new Error(unexpected);
1895	>	}
1896	>	assertNotSame(o, clone); // not 100% guaranteed by spec
1897	>	assertSame(o.getClass(), clone.getClass());
1898	>	return clone;
1899	>	}
1900	>
1901	>	public void assertThrows(Class<? extends Throwable> expectedExceptionClass,
1902	>	Action... throwingActions) {
1903	>	for (Action throwingAction : throwingActions) {
1904	>	boolean threw = false;
1905	>	try { throwingAction.run(); }
1906	>	catch (Throwable t) {
1907	>	threw = true;
1908	>	if (!expectedExceptionClass.isInstance(t))
1909	>	throw new AssertionError(
1910	>	"Expected " + expectedExceptionClass.getName() +
1911	>	", got " + t.getClass().getName(),
1912	>	t);
1913		}
1914	<	return Boolean.TRUE;
1914	>	if (!threw)
1915	>	shouldThrow(expectedExceptionClass.getName());
1916		}
1917		}
1918
1919	+	public void assertIteratorExhausted(Iterator<?> it) {
1920	+	try {
1921	+	it.next();
1922	+	shouldThrow();
1923	+	} catch (NoSuchElementException success) {}
1924	+	assertFalse(it.hasNext());
1925	+	}
1926	+
1927	+	public <T> Callable<T> callableThrowing(final Exception ex) {
1928	+	return new Callable<T>() { public T call() throws Exception { throw ex; }};
1929	+	}
1930	+
1931	+	public Runnable runnableThrowing(final RuntimeException ex) {
1932	+	return new Runnable() { public void run() { throw ex; }};
1933	+	}
1934	+
1935	+	/** A reusable thread pool to be shared by tests. */
1936	+	static final ExecutorService cachedThreadPool =
1937	+	new ThreadPoolExecutor(0, Integer.MAX_VALUE,
1938	+	1000L, MILLISECONDS,
1939	+	new SynchronousQueue<Runnable>());
1940	+
1941	+	static <T> void shuffle(T[] array) {
1942	+	Collections.shuffle(Arrays.asList(array), ThreadLocalRandom.current());
1943	+	}
1944
1945		/**
1946	<	* For use as RejectedExecutionHandler in constructors
1946	>	* Returns the same String as would be returned by {@link
1947	>	* Object#toString}, whether or not the given object's class
1948	>	* overrides toString().
1949	>	*
1950	>	* @see System#identityHashCode
1951		*/
1952	<	static class NoOpREHandler implements RejectedExecutionHandler {
1953	<	public void rejectedExecution(Runnable r,
1954	<	ThreadPoolExecutor executor) {}
1952	>	static String identityString(Object x) {
1953	>	return x.getClass().getName()
1954	>	+ "@" + Integer.toHexString(System.identityHashCode(x));
1955	>	}
1956	>
1957	>	// --- Shared assertions for Executor tests ---
1958	>
1959	>	/**
1960	>	* Returns maximum number of tasks that can be submitted to given
1961	>	* pool (with bounded queue) before saturation (when submission
1962	>	* throws RejectedExecutionException).
1963	>	*/
1964	>	static final int saturatedSize(ThreadPoolExecutor pool) {
1965	>	BlockingQueue<Runnable> q = pool.getQueue();
1966	>	return pool.getMaximumPoolSize() + q.size() + q.remainingCapacity();
1967	>	}
1968	>
1969	>	@SuppressWarnings("FutureReturnValueIgnored")
1970	>	void assertNullTaskSubmissionThrowsNullPointerException(Executor e) {
1971	>	try {
1972	>	e.execute((Runnable) null);
1973	>	shouldThrow();
1974	>	} catch (NullPointerException success) {}
1975	>
1976	>	if (! (e instanceof ExecutorService)) return;
1977	>	ExecutorService es = (ExecutorService) e;
1978	>	try {
1979	>	es.submit((Runnable) null);
1980	>	shouldThrow();
1981	>	} catch (NullPointerException success) {}
1982	>	try {
1983	>	es.submit((Runnable) null, Boolean.TRUE);
1984	>	shouldThrow();
1985	>	} catch (NullPointerException success) {}
1986	>	try {
1987	>	es.submit((Callable) null);
1988	>	shouldThrow();
1989	>	} catch (NullPointerException success) {}
1990	>
1991	>	if (! (e instanceof ScheduledExecutorService)) return;
1992	>	ScheduledExecutorService ses = (ScheduledExecutorService) e;
1993	>	try {
1994	>	ses.schedule((Runnable) null,
1995	>	randomTimeout(), randomTimeUnit());
1996	>	shouldThrow();
1997	>	} catch (NullPointerException success) {}
1998	>	try {
1999	>	ses.schedule((Callable) null,
2000	>	randomTimeout(), randomTimeUnit());
2001	>	shouldThrow();
2002	>	} catch (NullPointerException success) {}
2003	>	try {
2004	>	ses.scheduleAtFixedRate((Runnable) null,
2005	>	randomTimeout(), LONG_DELAY_MS, MILLISECONDS);
2006	>	shouldThrow();
2007	>	} catch (NullPointerException success) {}
2008	>	try {
2009	>	ses.scheduleWithFixedDelay((Runnable) null,
2010	>	randomTimeout(), LONG_DELAY_MS, MILLISECONDS);
2011	>	shouldThrow();
2012	>	} catch (NullPointerException success) {}
2013	>	}
2014	>
2015	>	void setRejectedExecutionHandler(
2016	>	ThreadPoolExecutor p, RejectedExecutionHandler handler) {
2017	>	p.setRejectedExecutionHandler(handler);
2018	>	assertSame(handler, p.getRejectedExecutionHandler());
2019	>	}
2020	>
2021	>	void assertTaskSubmissionsAreRejected(ThreadPoolExecutor p) {
2022	>	final RejectedExecutionHandler savedHandler = p.getRejectedExecutionHandler();
2023	>	final long savedTaskCount = p.getTaskCount();
2024	>	final long savedCompletedTaskCount = p.getCompletedTaskCount();
2025	>	final int savedQueueSize = p.getQueue().size();
2026	>	final boolean stock = (p.getClass().getClassLoader() == null);
2027	>
2028	>	Runnable r = () -> {};
2029	>	Callable<Boolean> c = () -> Boolean.TRUE;
2030	>
2031	>	class Recorder implements RejectedExecutionHandler {
2032	>	public volatile Runnable r = null;
2033	>	public volatile ThreadPoolExecutor p = null;
2034	>	public void reset() { r = null; p = null; }
2035	>	public void rejectedExecution(Runnable r, ThreadPoolExecutor p) {
2036	>	assertNull(this.r);
2037	>	assertNull(this.p);
2038	>	this.r = r;
2039	>	this.p = p;
2040	>	}
2041	>	}
2042	>
2043	>	// check custom handler is invoked exactly once per task
2044	>	Recorder recorder = new Recorder();
2045	>	setRejectedExecutionHandler(p, recorder);
2046	>	for (int i = 2; i--> 0; ) {
2047	>	recorder.reset();
2048	>	p.execute(r);
2049	>	if (stock && p.getClass() == ThreadPoolExecutor.class)
2050	>	assertSame(r, recorder.r);
2051	>	assertSame(p, recorder.p);
2052	>
2053	>	recorder.reset();
2054	>	assertFalse(p.submit(r).isDone());
2055	>	if (stock) assertTrue(!((FutureTask) recorder.r).isDone());
2056	>	assertSame(p, recorder.p);
2057	>
2058	>	recorder.reset();
2059	>	assertFalse(p.submit(r, Boolean.TRUE).isDone());
2060	>	if (stock) assertTrue(!((FutureTask) recorder.r).isDone());
2061	>	assertSame(p, recorder.p);
2062	>
2063	>	recorder.reset();
2064	>	assertFalse(p.submit(c).isDone());
2065	>	if (stock) assertTrue(!((FutureTask) recorder.r).isDone());
2066	>	assertSame(p, recorder.p);
2067	>
2068	>	if (p instanceof ScheduledExecutorService) {
2069	>	ScheduledExecutorService s = (ScheduledExecutorService) p;
2070	>	ScheduledFuture<?> future;
2071	>
2072	>	recorder.reset();
2073	>	future = s.schedule(r, randomTimeout(), randomTimeUnit());
2074	>	assertFalse(future.isDone());
2075	>	if (stock) assertTrue(!((FutureTask) recorder.r).isDone());
2076	>	assertSame(p, recorder.p);
2077	>
2078	>	recorder.reset();
2079	>	future = s.schedule(c, randomTimeout(), randomTimeUnit());
2080	>	assertFalse(future.isDone());
2081	>	if (stock) assertTrue(!((FutureTask) recorder.r).isDone());
2082	>	assertSame(p, recorder.p);
2083	>
2084	>	recorder.reset();
2085	>	future = s.scheduleAtFixedRate(r, randomTimeout(), LONG_DELAY_MS, MILLISECONDS);
2086	>	assertFalse(future.isDone());
2087	>	if (stock) assertTrue(!((FutureTask) recorder.r).isDone());
2088	>	assertSame(p, recorder.p);
2089	>
2090	>	recorder.reset();
2091	>	future = s.scheduleWithFixedDelay(r, randomTimeout(), LONG_DELAY_MS, MILLISECONDS);
2092	>	assertFalse(future.isDone());
2093	>	if (stock) assertTrue(!((FutureTask) recorder.r).isDone());
2094	>	assertSame(p, recorder.p);
2095	>	}
2096	>	}
2097	>
2098	>	// Checking our custom handler above should be sufficient, but
2099	>	// we add some integration tests of standard handlers.
2100	>	final AtomicReference<Thread> thread = new AtomicReference<>();
2101	>	final Runnable setThread = () -> thread.set(Thread.currentThread());
2102	>
2103	>	setRejectedExecutionHandler(p, new ThreadPoolExecutor.AbortPolicy());
2104	>	try {
2105	>	p.execute(setThread);
2106	>	shouldThrow();
2107	>	} catch (RejectedExecutionException success) {}
2108	>	assertNull(thread.get());
2109	>
2110	>	setRejectedExecutionHandler(p, new ThreadPoolExecutor.DiscardPolicy());
2111	>	p.execute(setThread);
2112	>	assertNull(thread.get());
2113	>
2114	>	setRejectedExecutionHandler(p, new ThreadPoolExecutor.CallerRunsPolicy());
2115	>	p.execute(setThread);
2116	>	if (p.isShutdown())
2117	>	assertNull(thread.get());
2118	>	else
2119	>	assertSame(Thread.currentThread(), thread.get());
2120	>
2121	>	setRejectedExecutionHandler(p, savedHandler);
2122	>
2123	>	// check that pool was not perturbed by handlers
2124	>	assertEquals(savedTaskCount, p.getTaskCount());
2125	>	assertEquals(savedCompletedTaskCount, p.getCompletedTaskCount());
2126	>	assertEquals(savedQueueSize, p.getQueue().size());
2127	>	}
2128	>
2129	>	void assertCollectionsEquals(Collection<?> x, Collection<?> y) {
2130	>	assertEquals(x, y);
2131	>	assertEquals(y, x);
2132	>	assertEquals(x.isEmpty(), y.isEmpty());
2133	>	assertEquals(x.size(), y.size());
2134	>	if (x instanceof List) {
2135	>	assertEquals(x.toString(), y.toString());
2136	>	}
2137	>	if (x instanceof List || x instanceof Set) {
2138	>	assertEquals(x.hashCode(), y.hashCode());
2139	>	}
2140	>	if (x instanceof List || x instanceof Deque) {
2141	>	assertTrue(Arrays.equals(x.toArray(), y.toArray()));
2142	>	assertTrue(Arrays.equals(x.toArray(new Object[0]),
2143	>	y.toArray(new Object[0])));
2144	>	}
2145		}
2146
2147	+	/**
2148	+	* A weaker form of assertCollectionsEquals which does not insist
2149	+	* that the two collections satisfy Object#equals(Object), since
2150	+	* they may use identity semantics as Deques do.
2151	+	*/
2152	+	void assertCollectionsEquivalent(Collection<?> x, Collection<?> y) {
2153	+	if (x instanceof List || x instanceof Set)
2154	+	assertCollectionsEquals(x, y);
2155	+	else {
2156	+	assertEquals(x.isEmpty(), y.isEmpty());
2157	+	assertEquals(x.size(), y.size());
2158	+	assertEquals(new HashSet(x), new HashSet(y));
2159	+	if (x instanceof Deque) {
2160	+	assertTrue(Arrays.equals(x.toArray(), y.toArray()));
2161	+	assertTrue(Arrays.equals(x.toArray(new Object[0]),
2162	+	y.toArray(new Object[0])));
2163	+	}
2164	+	}
2165	+	}
2166		}

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