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

Comparing jsr166/src/test/tck/JSR166TestCase.java (file contents):
Revision 1.4 by dl, Thu Sep 25 11:02:41 2003 UTC vs.
Revision 1.266 by jsr166, Sat Sep 7 17:40:05 2019 UTC

#	Line 1 | Line 1
1		/*
2	<	* Written by members of JCP JSR-166 Expert Group and released to the
3	<	* public domain. Use, modify, and redistribute this code in any way
4	<	* without acknowledgement. Other contributors include Andrew Wright,
5	<	* Jeffrey Hayes, Pat Fischer, Mike Judd.
2	>	* Written by Doug Lea and Martin Buchholz with assistance from
3	>	* members of JCP JSR-166 Expert Group and released to the public
4	>	* domain, as explained at
5	>	* http://creativecommons.org/publicdomain/zero/1.0/
6	>	* Other contributors include Andrew Wright, Jeffrey Hayes,
7	>	* Pat Fisher, Mike Judd.
8		*/
9
10	<	import junit.framework.*;
11	<	import java.util.*;
12	<	import java.util.concurrent.*;
13	<	import java.io.*;
10	>	/*
11	>	* @test
12	>	* @summary JSR-166 tck tests, in a number of variations.
13	>	*          The first is the conformance testing variant,
14	>	*          while others also test implementation details.
15	>	* @build *
16	>	* @modules java.management
17	>	* @run junit/othervm/timeout=1000 JSR166TestCase
18	>	* @run junit/othervm/timeout=1000
19	>	*      --add-opens java.base/java.util.concurrent=ALL-UNNAMED
20	>	*      --add-opens java.base/java.lang=ALL-UNNAMED
21	>	*      -Djsr166.testImplementationDetails=true
22	>	*      JSR166TestCase
23	>	* @run junit/othervm/timeout=1000
24	>	*      --add-opens java.base/java.util.concurrent=ALL-UNNAMED
25	>	*      --add-opens java.base/java.lang=ALL-UNNAMED
26	>	*      -Djsr166.testImplementationDetails=true
27	>	*      -Djava.util.concurrent.ForkJoinPool.common.parallelism=0
28	>	*      JSR166TestCase
29	>	* @run junit/othervm/timeout=1000
30	>	*      --add-opens java.base/java.util.concurrent=ALL-UNNAMED
31	>	*      --add-opens java.base/java.lang=ALL-UNNAMED
32	>	*      -Djsr166.testImplementationDetails=true
33	>	*      -Djava.util.concurrent.ForkJoinPool.common.parallelism=1
34	>	*      -Djava.util.secureRandomSeed=true
35	>	*      JSR166TestCase
36	>	* @run junit/othervm/timeout=1000/policy=tck.policy
37	>	*      --add-opens java.base/java.util.concurrent=ALL-UNNAMED
38	>	*      --add-opens java.base/java.lang=ALL-UNNAMED
39	>	*      -Djsr166.testImplementationDetails=true
40	>	*      JSR166TestCase
41	>	*/
42
43	+	import static java.util.concurrent.TimeUnit.MILLISECONDS;
44	+	import static java.util.concurrent.TimeUnit.MINUTES;
45	+	import static java.util.concurrent.TimeUnit.NANOSECONDS;
46	+
47	+	import java.io.ByteArrayInputStream;
48	+	import java.io.ByteArrayOutputStream;
49	+	import java.io.ObjectInputStream;
50	+	import java.io.ObjectOutputStream;
51	+	import java.lang.management.ManagementFactory;
52	+	import java.lang.management.ThreadInfo;
53	+	import java.lang.management.ThreadMXBean;
54	+	import java.lang.reflect.Constructor;
55	+	import java.lang.reflect.Method;
56	+	import java.lang.reflect.Modifier;
57	+	import java.security.CodeSource;
58	+	import java.security.Permission;
59	+	import java.security.PermissionCollection;
60	+	import java.security.Permissions;
61	+	import java.security.Policy;
62	+	import java.security.ProtectionDomain;
63	+	import java.security.SecurityPermission;
64	+	import java.util.ArrayList;
65	+	import java.util.Arrays;
66	+	import java.util.Collection;
67	+	import java.util.Collections;
68	+	import java.util.Date;
69	+	import java.util.Deque;
70	+	import java.util.Enumeration;
71	+	import java.util.HashSet;
72	+	import java.util.Iterator;
73	+	import java.util.List;
74	+	import java.util.NoSuchElementException;
75	+	import java.util.PropertyPermission;
76	+	import java.util.Set;
77	+	import java.util.concurrent.BlockingQueue;
78	+	import java.util.concurrent.Callable;
79	+	import java.util.concurrent.CountDownLatch;
80	+	import java.util.concurrent.CyclicBarrier;
81	+	import java.util.concurrent.ExecutionException;
82	+	import java.util.concurrent.Executor;
83	+	import java.util.concurrent.Executors;
84	+	import java.util.concurrent.ExecutorService;
85	+	import java.util.concurrent.ForkJoinPool;
86	+	import java.util.concurrent.Future;
87	+	import java.util.concurrent.FutureTask;
88	+	import java.util.concurrent.RecursiveAction;
89	+	import java.util.concurrent.RecursiveTask;
90	+	import java.util.concurrent.RejectedExecutionException;
91	+	import java.util.concurrent.RejectedExecutionHandler;
92	+	import java.util.concurrent.Semaphore;
93	+	import java.util.concurrent.ScheduledExecutorService;
94	+	import java.util.concurrent.ScheduledFuture;
95	+	import java.util.concurrent.SynchronousQueue;
96	+	import java.util.concurrent.ThreadFactory;
97	+	import java.util.concurrent.ThreadLocalRandom;
98	+	import java.util.concurrent.ThreadPoolExecutor;
99	+	import java.util.concurrent.TimeUnit;
100	+	import java.util.concurrent.TimeoutException;
101	+	import java.util.concurrent.atomic.AtomicBoolean;
102	+	import java.util.concurrent.atomic.AtomicReference;
103	+	import java.util.regex.Pattern;
104	+
105	+	import junit.framework.Test;
106	+	import junit.framework.TestCase;
107	+	import junit.framework.TestResult;
108	+	import junit.framework.TestSuite;
109
110		/**
111	<	* Base class for JSR166 Junit TCK tests.  Defines some constants and
112	<	* utility methods, as well as a simple framework for helping to make
113	<	* sure that assertions failing in generated threads cause the
114	<	* associated test that generated them to itself fail (which JUnit doe
115	<	* not otherwise arrange).  The rules for creating such tests are:
111	>	* Base class for JSR166 Junit TCK tests.  Defines some constants,
112	>	* utility methods and classes, as well as a simple framework for
113	>	* helping to make sure that assertions failing in generated threads
114	>	* cause the associated test that generated them to itself fail (which
115	>	* JUnit does not otherwise arrange).  The rules for creating such
116	>	* tests are:
117		*
118		* <ol>
119		*
120	<	* <li> All assertions in code running in generated threads must use
121	<	* the forms {@link threadFail} , {@link threadAssertTrue} {@link
122	<	* threadAssertEquals}, or {@link threadAssertNull}, (not
123	<	* <tt>fail</tt>, <tt>assertTrue</tt>, etc.) It is OK (but not
124	<	* particularly recommended) for other code to use these forms too.
125	<	* Only the most typically used JUnit assertion methods are defined
126	<	* this way, but enough to live with.</li>
120	>	* <li>All code not running in the main test thread (manually spawned threads
121	>	* or the common fork join pool) must be checked for failure (and completion!).
122	>	* Mechanisms that can be used to ensure this are:
123	>	*   <ol>
124	>	*   <li>Signalling via a synchronizer like AtomicInteger or CountDownLatch
125	>	*    that the task completed normally, which is checked before returning from
126	>	*    the test method in the main thread.
127	>	*   <li>Using the forms {@link #threadFail}, {@link #threadAssertTrue},
128	>	*    or {@link #threadAssertNull}, (not {@code fail}, {@code assertTrue}, etc.)
129	>	*    Only the most typically used JUnit assertion methods are defined
130	>	*    this way, but enough to live with.
131	>	*   <li>Recording failure explicitly using {@link #threadUnexpectedException}
132	>	*    or {@link #threadRecordFailure}.
133	>	*   <li>Using a wrapper like CheckedRunnable that uses one the mechanisms above.
134	>	*   </ol>
135		*
136	<	* <li> If you override {@link setUp} or {@link tearDown}, make sure
137	<	* to invoke <tt>super.setUp</tt> and <tt>super.tearDown</tt> within
136	>	* <li>If you override {@link #setUp} or {@link #tearDown}, make sure
137	>	* to invoke {@code super.setUp} and {@code super.tearDown} within
138		* them. These methods are used to clear and check for thread
139	<	* assertion failures.</li>
139	>	* assertion failures.
140		*
141	<	* <li>All delays and timeouts must use one of the constants {@link
142	<	* SHORT_DELAY_MS}, {@link SMALL_DELAY_MS}, {@link MEDIUM_DELAY_MS},
143	<	* {@link LONG_DELAY_MS}. The idea here is that a SHORT is always
144	<	* discriminatable from zero time, and always allows enough time for
145	<	* the small amounts of computation (creating a thread, calling a few
141	>	* <li>All delays and timeouts must use one of the constants {@code
142	>	* SHORT_DELAY_MS}, {@code SMALL_DELAY_MS}, {@code MEDIUM_DELAY_MS},
143	>	* {@code LONG_DELAY_MS}. The idea here is that a SHORT is always
144	>	* discriminable from zero time, and always allows enough time for the
145	>	* small amounts of computation (creating a thread, calling a few
146		* methods, etc) needed to reach a timeout point. Similarly, a SMALL
147		* is always discriminable as larger than SHORT and smaller than
148		* MEDIUM.  And so on. These constants are set to conservative values,
149		* but even so, if there is ever any doubt, they can all be increased
150	<	* in one spot to rerun tests on slower platforms</li>
150	>	* in one spot to rerun tests on slower platforms.
151		*
152	<	* <li> All threads generated must be joined inside each test case
153	<	* method (or <tt>fail</tt> to do so) before returning from the
154	<	* method. The {@link joinPool} method can be used to do this when
155	<	* using Executors.</li>
152	>	* <li>All threads generated must be joined inside each test case
153	>	* method (or {@code fail} to do so) before returning from the
154	>	* method. The {@code joinPool} method can be used to do this when
155	>	* using Executors.
156		*
157		* </ol>
158	+	*
159	+	* <p><b>Other notes</b>
160	+	* <ul>
161	+	*
162	+	* <li>Usually, there is one testcase method per JSR166 method
163	+	* covering "normal" operation, and then as many exception-testing
164	+	* methods as there are exceptions the method can throw. Sometimes
165	+	* there are multiple tests per JSR166 method when the different
166	+	* "normal" behaviors differ significantly. And sometimes testcases
167	+	* cover multiple methods when they cannot be tested in isolation.
168	+	*
169	+	* <li>The documentation style for testcases is to provide as javadoc
170	+	* a simple sentence or two describing the property that the testcase
171	+	* method purports to test. The javadocs do not say anything about how
172	+	* the property is tested. To find out, read the code.
173	+	*
174	+	* <li>These tests are "conformance tests", and do not attempt to
175	+	* test throughput, latency, scalability or other performance factors
176	+	* (see the separate "jtreg" tests for a set intended to check these
177	+	* for the most central aspects of functionality.) So, most tests use
178	+	* the smallest sensible numbers of threads, collection sizes, etc
179	+	* needed to check basic conformance.
180	+	*
181	+	* <li>The test classes currently do not declare inclusion in
182	+	* any particular package to simplify things for people integrating
183	+	* them in TCK test suites.
184	+	*
185	+	* <li>As a convenience, the {@code main} of this class (JSR166TestCase)
186	+	* runs all JSR166 unit tests.
187	+	*
188	+	* </ul>
189		*/
190		public class JSR166TestCase extends TestCase {
191	+	private static final boolean useSecurityManager =
192	+	Boolean.getBoolean("jsr166.useSecurityManager");
193	+
194	+	protected static final boolean expensiveTests =
195	+	Boolean.getBoolean("jsr166.expensiveTests");
196	+
197	+	/**
198	+	* If true, also run tests that are not part of the official tck
199	+	* because they test unspecified implementation details.
200	+	*/
201	+	protected static final boolean testImplementationDetails =
202	+	Boolean.getBoolean("jsr166.testImplementationDetails");
203	+
204	+	/**
205	+	* If true, report on stdout all "slow" tests, that is, ones that
206	+	* take more than profileThreshold milliseconds to execute.
207	+	*/
208	+	private static final boolean profileTests =
209	+	Boolean.getBoolean("jsr166.profileTests");
210	+
211	+	/**
212	+	* The number of milliseconds that tests are permitted for
213	+	* execution without being reported, when profileTests is set.
214	+	*/
215	+	private static final long profileThreshold =
216	+	Long.getLong("jsr166.profileThreshold", 100);
217	+
218	+	/**
219	+	* The number of repetitions per test (for tickling rare bugs).
220	+	*/
221	+	private static final int runsPerTest =
222	+	Integer.getInteger("jsr166.runsPerTest", 1);
223	+
224	+	/**
225	+	* The number of repetitions of the test suite (for finding leaks?).
226	+	*/
227	+	private static final int suiteRuns =
228	+	Integer.getInteger("jsr166.suiteRuns", 1);
229	+
230	+	/**
231	+	* Returns the value of the system property, or NaN if not defined.
232	+	*/
233	+	private static float systemPropertyValue(String name) {
234	+	String floatString = System.getProperty(name);
235	+	if (floatString == null)
236	+	return Float.NaN;
237	+	try {
238	+	return Float.parseFloat(floatString);
239	+	} catch (NumberFormatException ex) {
240	+	throw new IllegalArgumentException(
241	+	String.format("Bad float value in system property %s=%s",
242	+	name, floatString));
243	+	}
244	+	}
245	+
246	+	/**
247	+	* The scaling factor to apply to standard delays used in tests.
248	+	* May be initialized from any of:
249	+	* - the "jsr166.delay.factor" system property
250	+	* - the "test.timeout.factor" system property (as used by jtreg)
251	+	*   See: http://openjdk.java.net/jtreg/tag-spec.html
252	+	* - hard-coded fuzz factor when using a known slowpoke VM
253	+	*/
254	+	private static final float delayFactor = delayFactor();
255	+
256	+	private static float delayFactor() {
257	+	float x;
258	+	if (!Float.isNaN(x = systemPropertyValue("jsr166.delay.factor")))
259	+	return x;
260	+	if (!Float.isNaN(x = systemPropertyValue("test.timeout.factor")))
261	+	return x;
262	+	String prop = System.getProperty("java.vm.version");
263	+	if (prop != null && prop.matches(".*debug.*"))
264	+	return 4.0f; // How much slower is fastdebug than product?!
265	+	return 1.0f;
266	+	}
267	+
268	+	public JSR166TestCase() { super(); }
269	+	public JSR166TestCase(String name) { super(name); }
270	+
271	+	/**
272	+	* A filter for tests to run, matching strings of the form
273	+	* methodName(className), e.g. "testInvokeAll5(ForkJoinPoolTest)"
274	+	* Usefully combined with jsr166.runsPerTest.
275	+	*/
276	+	private static final Pattern methodFilter = methodFilter();
277	+
278	+	private static Pattern methodFilter() {
279	+	String regex = System.getProperty("jsr166.methodFilter");
280	+	return (regex == null) ? null : Pattern.compile(regex);
281	+	}
282	+
283	+	// Instrumentation to debug very rare, but very annoying hung test runs.
284	+	static volatile TestCase currentTestCase;
285	+	// static volatile int currentRun = 0;
286	+	static {
287	+	Runnable wedgedTestDetector = new Runnable() { public void run() {
288	+	// Avoid spurious reports with enormous runsPerTest.
289	+	// A single test case run should never take more than 1 second.
290	+	// But let's cap it at the high end too ...
291	+	final int timeoutMinutesMin = Math.max(runsPerTest / 60, 1)
292	+	* Math.max((int) delayFactor, 1);
293	+	final int timeoutMinutes = Math.min(15, timeoutMinutesMin);
294	+	for (TestCase lastTestCase = currentTestCase;;) {
295	+	try { MINUTES.sleep(timeoutMinutes); }
296	+	catch (InterruptedException unexpected) { break; }
297	+	if (lastTestCase == currentTestCase) {
298	+	System.err.printf(
299	+	"Looks like we're stuck running test: %s%n",
300	+	lastTestCase);
301	+	//                     System.err.printf(
302	+	//                         "Looks like we're stuck running test: %s (%d/%d)%n",
303	+	//                         lastTestCase, currentRun, runsPerTest);
304	+	//                     System.err.println("availableProcessors=" +
305	+	//                         Runtime.getRuntime().availableProcessors());
306	+	//                     System.err.printf("cpu model = %s%n", cpuModel());
307	+	dumpTestThreads();
308	+	// one stack dump is probably enough; more would be spam
309	+	break;
310	+	}
311	+	lastTestCase = currentTestCase;
312	+	}}};
313	+	Thread thread = new Thread(wedgedTestDetector, "WedgedTestDetector");
314	+	thread.setDaemon(true);
315	+	thread.start();
316	+	}
317	+
318	+	//     public static String cpuModel() {
319	+	//         try {
320	+	//             java.util.regex.Matcher matcher
321	+	//               = Pattern.compile("model name\\s*: (.*)")
322	+	//                 .matcher(new String(
323	+	//                     java.nio.file.Files.readAllBytes(
324	+	//                         java.nio.file.Paths.get("/proc/cpuinfo")), "UTF-8"));
325	+	//             matcher.find();
326	+	//             return matcher.group(1);
327	+	//         } catch (Exception ex) { return null; }
328	+	//     }
329	+
330	+	public void runBare() throws Throwable {
331	+	currentTestCase = this;
332	+	if (methodFilter == null
333	+	|| methodFilter.matcher(toString()).find())
334	+	super.runBare();
335	+	}
336	+
337	+	protected void runTest() throws Throwable {
338	+	for (int i = 0; i < runsPerTest; i++) {
339	+	// currentRun = i;
340	+	if (profileTests)
341	+	runTestProfiled();
342	+	else
343	+	super.runTest();
344	+	}
345	+	}
346	+
347	+	protected void runTestProfiled() throws Throwable {
348	+	for (int i = 0; i < 2; i++) {
349	+	long startTime = System.nanoTime();
350	+	super.runTest();
351	+	long elapsedMillis = millisElapsedSince(startTime);
352	+	if (elapsedMillis < profileThreshold)
353	+	break;
354	+	// Never report first run of any test; treat it as a
355	+	// warmup run, notably to trigger all needed classloading,
356	+	if (i > 0)
357	+	System.out.printf("%n%s: %d%n", toString(), elapsedMillis);
358	+	}
359	+	}
360	+
361	+	/**
362	+	* Runs all JSR166 unit tests using junit.textui.TestRunner.
363	+	*/
364	+	public static void main(String[] args) {
365	+	main(suite(), args);
366	+	}
367	+
368	+	static class PithyResultPrinter extends junit.textui.ResultPrinter {
369	+	PithyResultPrinter(java.io.PrintStream writer) { super(writer); }
370	+	long runTime;
371	+	public void startTest(Test test) {}
372	+	protected void printHeader(long runTime) {
373	+	this.runTime = runTime; // defer printing for later
374	+	}
375	+	protected void printFooter(TestResult result) {
376	+	if (result.wasSuccessful()) {
377	+	getWriter().println("OK (" + result.runCount() + " tests)"
378	+	+ "  Time: " + elapsedTimeAsString(runTime));
379	+	} else {
380	+	getWriter().println("Time: " + elapsedTimeAsString(runTime));
381	+	super.printFooter(result);
382	+	}
383	+	}
384	+	}
385	+
386	+	/**
387	+	* Returns a TestRunner that doesn't bother with unnecessary
388	+	* fluff, like printing a "." for each test case.
389	+	*/
390	+	static junit.textui.TestRunner newPithyTestRunner() {
391	+	junit.textui.TestRunner runner = new junit.textui.TestRunner();
392	+	runner.setPrinter(new PithyResultPrinter(System.out));
393	+	return runner;
394	+	}
395	+
396	+	/**
397	+	* Runs all unit tests in the given test suite.
398	+	* Actual behavior influenced by jsr166.* system properties.
399	+	*/
400	+	static void main(Test suite, String[] args) {
401	+	if (useSecurityManager) {
402	+	System.err.println("Setting a permissive security manager");
403	+	Policy.setPolicy(permissivePolicy());
404	+	System.setSecurityManager(new SecurityManager());
405	+	}
406	+	for (int i = 0; i < suiteRuns; i++) {
407	+	TestResult result = newPithyTestRunner().doRun(suite);
408	+	if (!result.wasSuccessful())
409	+	System.exit(1);
410	+	System.gc();
411	+	System.runFinalization();
412	+	}
413	+	}
414	+
415	+	public static TestSuite newTestSuite(Object... suiteOrClasses) {
416	+	TestSuite suite = new TestSuite();
417	+	for (Object suiteOrClass : suiteOrClasses) {
418	+	if (suiteOrClass instanceof TestSuite)
419	+	suite.addTest((TestSuite) suiteOrClass);
420	+	else if (suiteOrClass instanceof Class)
421	+	suite.addTest(new TestSuite((Class<?>) suiteOrClass));
422	+	else
423	+	throw new ClassCastException("not a test suite or class");
424	+	}
425	+	return suite;
426	+	}
427	+
428	+	public static void addNamedTestClasses(TestSuite suite,
429	+	String... testClassNames) {
430	+	for (String testClassName : testClassNames) {
431	+	try {
432	+	Class<?> testClass = Class.forName(testClassName);
433	+	Method m = testClass.getDeclaredMethod("suite");
434	+	suite.addTest(newTestSuite((Test)m.invoke(null)));
435	+	} catch (ReflectiveOperationException e) {
436	+	throw new AssertionError("Missing test class", e);
437	+	}
438	+	}
439	+	}
440	+
441	+	public static final double JAVA_CLASS_VERSION;
442	+	public static final String JAVA_SPECIFICATION_VERSION;
443	+	static {
444	+	try {
445	+	JAVA_CLASS_VERSION = java.security.AccessController.doPrivileged(
446	+	new java.security.PrivilegedAction<Double>() {
447	+	public Double run() {
448	+	return Double.valueOf(System.getProperty("java.class.version"));}});
449	+	JAVA_SPECIFICATION_VERSION = java.security.AccessController.doPrivileged(
450	+	new java.security.PrivilegedAction<String>() {
451	+	public String run() {
452	+	return System.getProperty("java.specification.version");}});
453	+	} catch (Throwable t) {
454	+	throw new Error(t);
455	+	}
456	+	}
457	+
458	+	public static boolean atLeastJava6()  { return JAVA_CLASS_VERSION >= 50.0; }
459	+	public static boolean atLeastJava7()  { return JAVA_CLASS_VERSION >= 51.0; }
460	+	public static boolean atLeastJava8()  { return JAVA_CLASS_VERSION >= 52.0; }
461	+	public static boolean atLeastJava9()  { return JAVA_CLASS_VERSION >= 53.0; }
462	+	public static boolean atLeastJava10() { return JAVA_CLASS_VERSION >= 54.0; }
463	+	public static boolean atLeastJava11() { return JAVA_CLASS_VERSION >= 55.0; }
464	+	public static boolean atLeastJava12() { return JAVA_CLASS_VERSION >= 56.0; }
465	+	public static boolean atLeastJava13() { return JAVA_CLASS_VERSION >= 57.0; }
466	+	public static boolean atLeastJava14() { return JAVA_CLASS_VERSION >= 58.0; }
467	+	public static boolean atLeastJava15() { return JAVA_CLASS_VERSION >= 59.0; }
468	+	public static boolean atLeastJava16() { return JAVA_CLASS_VERSION >= 60.0; }
469	+	public static boolean atLeastJava17() { return JAVA_CLASS_VERSION >= 61.0; }
470	+
471	+	/**
472	+	* Collects all JSR166 unit tests as one suite.
473	+	*/
474	+	public static Test suite() {
475	+	// Java7+ test classes
476	+	TestSuite suite = newTestSuite(
477	+	ForkJoinPoolTest.suite(),
478	+	ForkJoinTaskTest.suite(),
479	+	RecursiveActionTest.suite(),
480	+	RecursiveTaskTest.suite(),
481	+	LinkedTransferQueueTest.suite(),
482	+	PhaserTest.suite(),
483	+	ThreadLocalRandomTest.suite(),
484	+	AbstractExecutorServiceTest.suite(),
485	+	AbstractQueueTest.suite(),
486	+	AbstractQueuedSynchronizerTest.suite(),
487	+	AbstractQueuedLongSynchronizerTest.suite(),
488	+	ArrayBlockingQueueTest.suite(),
489	+	ArrayDequeTest.suite(),
490	+	ArrayListTest.suite(),
491	+	AtomicBooleanTest.suite(),
492	+	AtomicIntegerArrayTest.suite(),
493	+	AtomicIntegerFieldUpdaterTest.suite(),
494	+	AtomicIntegerTest.suite(),
495	+	AtomicLongArrayTest.suite(),
496	+	AtomicLongFieldUpdaterTest.suite(),
497	+	AtomicLongTest.suite(),
498	+	AtomicMarkableReferenceTest.suite(),
499	+	AtomicReferenceArrayTest.suite(),
500	+	AtomicReferenceFieldUpdaterTest.suite(),
501	+	AtomicReferenceTest.suite(),
502	+	AtomicStampedReferenceTest.suite(),
503	+	ConcurrentHashMapTest.suite(),
504	+	ConcurrentLinkedDequeTest.suite(),
505	+	ConcurrentLinkedQueueTest.suite(),
506	+	ConcurrentSkipListMapTest.suite(),
507	+	ConcurrentSkipListSubMapTest.suite(),
508	+	ConcurrentSkipListSetTest.suite(),
509	+	ConcurrentSkipListSubSetTest.suite(),
510	+	CopyOnWriteArrayListTest.suite(),
511	+	CopyOnWriteArraySetTest.suite(),
512	+	CountDownLatchTest.suite(),
513	+	CountedCompleterTest.suite(),
514	+	CyclicBarrierTest.suite(),
515	+	DelayQueueTest.suite(),
516	+	EntryTest.suite(),
517	+	ExchangerTest.suite(),
518	+	ExecutorsTest.suite(),
519	+	ExecutorCompletionServiceTest.suite(),
520	+	FutureTaskTest.suite(),
521	+	HashtableTest.suite(),
522	+	LinkedBlockingDequeTest.suite(),
523	+	LinkedBlockingQueueTest.suite(),
524	+	LinkedListTest.suite(),
525	+	LockSupportTest.suite(),
526	+	PriorityBlockingQueueTest.suite(),
527	+	PriorityQueueTest.suite(),
528	+	ReentrantLockTest.suite(),
529	+	ReentrantReadWriteLockTest.suite(),
530	+	ScheduledExecutorTest.suite(),
531	+	ScheduledExecutorSubclassTest.suite(),
532	+	SemaphoreTest.suite(),
533	+	SynchronousQueueTest.suite(),
534	+	SystemTest.suite(),
535	+	ThreadLocalTest.suite(),
536	+	ThreadPoolExecutorTest.suite(),
537	+	ThreadPoolExecutorSubclassTest.suite(),
538	+	ThreadTest.suite(),
539	+	TimeUnitTest.suite(),
540	+	TreeMapTest.suite(),
541	+	TreeSetTest.suite(),
542	+	TreeSubMapTest.suite(),
543	+	TreeSubSetTest.suite(),
544	+	VectorTest.suite());
545	+
546	+	// Java8+ test classes
547	+	if (atLeastJava8()) {
548	+	String[] java8TestClassNames = {
549	+	"ArrayDeque8Test",
550	+	"Atomic8Test",
551	+	"CompletableFutureTest",
552	+	"ConcurrentHashMap8Test",
553	+	"CountedCompleter8Test",
554	+	"DoubleAccumulatorTest",
555	+	"DoubleAdderTest",
556	+	"ForkJoinPool8Test",
557	+	"ForkJoinTask8Test",
558	+	"HashMapTest",
559	+	"LinkedBlockingDeque8Test",
560	+	"LinkedBlockingQueue8Test",
561	+	"LinkedHashMapTest",
562	+	"LongAccumulatorTest",
563	+	"LongAdderTest",
564	+	"SplittableRandomTest",
565	+	"StampedLockTest",
566	+	"SubmissionPublisherTest",
567	+	"ThreadLocalRandom8Test",
568	+	"TimeUnit8Test",
569	+	};
570	+	addNamedTestClasses(suite, java8TestClassNames);
571	+	}
572	+
573	+	// Java9+ test classes
574	+	if (atLeastJava9()) {
575	+	String[] java9TestClassNames = {
576	+	"AtomicBoolean9Test",
577	+	"AtomicInteger9Test",
578	+	"AtomicIntegerArray9Test",
579	+	"AtomicLong9Test",
580	+	"AtomicLongArray9Test",
581	+	"AtomicReference9Test",
582	+	"AtomicReferenceArray9Test",
583	+	"ExecutorCompletionService9Test",
584	+	"ForkJoinPool9Test",
585	+	};
586	+	addNamedTestClasses(suite, java9TestClassNames);
587	+	}
588	+
589	+	return suite;
590	+	}
591	+
592	+	/** Returns list of junit-style test method names in given class. */
593	+	public static ArrayList<String> testMethodNames(Class<?> testClass) {
594	+	Method[] methods = testClass.getDeclaredMethods();
595	+	ArrayList<String> names = new ArrayList<>(methods.length);
596	+	for (Method method : methods) {
597	+	if (method.getName().startsWith("test")
598	+	&& Modifier.isPublic(method.getModifiers())
599	+	// method.getParameterCount() requires jdk8+
600	+	&& method.getParameterTypes().length == 0) {
601	+	names.add(method.getName());
602	+	}
603	+	}
604	+	return names;
605	+	}
606	+
607	+	/**
608	+	* Returns junit-style testSuite for the given test class, but
609	+	* parameterized by passing extra data to each test.
610	+	*/
611	+	public static <ExtraData> Test parameterizedTestSuite
612	+	(Class<? extends JSR166TestCase> testClass,
613	+	Class<ExtraData> dataClass,
614	+	ExtraData data) {
615	+	try {
616	+	TestSuite suite = new TestSuite();
617	+	Constructor c =
618	+	testClass.getDeclaredConstructor(dataClass, String.class);
619	+	for (String methodName : testMethodNames(testClass))
620	+	suite.addTest((Test) c.newInstance(data, methodName));
621	+	return suite;
622	+	} catch (ReflectiveOperationException e) {
623	+	throw new AssertionError(e);
624	+	}
625	+	}
626	+
627	+	/**
628	+	* Returns junit-style testSuite for the jdk8 extension of the
629	+	* given test class, but parameterized by passing extra data to
630	+	* each test.  Uses reflection to allow compilation in jdk7.
631	+	*/
632	+	public static <ExtraData> Test jdk8ParameterizedTestSuite
633	+	(Class<? extends JSR166TestCase> testClass,
634	+	Class<ExtraData> dataClass,
635	+	ExtraData data) {
636	+	if (atLeastJava8()) {
637	+	String name = testClass.getName();
638	+	String name8 = name.replaceAll("Test$", "8Test");
639	+	if (name.equals(name8)) throw new AssertionError(name);
640	+	try {
641	+	return (Test)
642	+	Class.forName(name8)
643	+	.getMethod("testSuite", dataClass)
644	+	.invoke(null, data);
645	+	} catch (ReflectiveOperationException e) {
646	+	throw new AssertionError(e);
647	+	}
648	+	} else {
649	+	return new TestSuite();
650	+	}
651	+	}
652	+
653	+	// Delays for timing-dependent tests, in milliseconds.
654
655		public static long SHORT_DELAY_MS;
656		public static long SMALL_DELAY_MS;
657		public static long MEDIUM_DELAY_MS;
658		public static long LONG_DELAY_MS;
659
660	+	/**
661	+	* A delay significantly longer than LONG_DELAY_MS.
662	+	* Use this in a thread that is waited for via awaitTermination(Thread).
663	+	*/
664	+	public static long LONGER_DELAY_MS;
665	+
666	+	private static final long RANDOM_TIMEOUT;
667	+	private static final long RANDOM_EXPIRED_TIMEOUT;
668	+	private static final TimeUnit RANDOM_TIMEUNIT;
669	+	static {
670	+	ThreadLocalRandom rnd = ThreadLocalRandom.current();
671	+	long[] timeouts = { Long.MIN_VALUE, -1, 0, 1, Long.MAX_VALUE };
672	+	RANDOM_TIMEOUT = timeouts[rnd.nextInt(timeouts.length)];
673	+	RANDOM_EXPIRED_TIMEOUT = timeouts[rnd.nextInt(3)];
674	+	TimeUnit[] timeUnits = TimeUnit.values();
675	+	RANDOM_TIMEUNIT = timeUnits[rnd.nextInt(timeUnits.length)];
676	+	}
677	+
678	+	/**
679	+	* Returns a timeout for use when any value at all will do.
680	+	*/
681	+	static long randomTimeout() { return RANDOM_TIMEOUT; }
682
683		/**
684	<	* Return the shortest timed delay. This could
685	<	* be reimplmented to use for example a Property.
686	<	*/
687	<	protected long getShortDelay() {
688	<	return 100;
684	>	* Returns a timeout that means "no waiting", i.e. not positive.
685	>	*/
686	>	static long randomExpiredTimeout() { return RANDOM_EXPIRED_TIMEOUT; }
687	>
688	>	/**
689	>	* Returns a random non-null TimeUnit.
690	>	*/
691	>	static TimeUnit randomTimeUnit() { return RANDOM_TIMEUNIT; }
692	>
693	>	/**
694	>	* Returns a random boolean; a "coin flip".
695	>	*/
696	>	static boolean randomBoolean() {
697	>	return ThreadLocalRandom.current().nextBoolean();
698	>	}
699	>
700	>	/**
701	>	* Returns a random element from given choices.
702	>	*/
703	>	<T> T chooseRandomly(T... choices) {
704	>	return choices[ThreadLocalRandom.current().nextInt(choices.length)];
705		}
706
707	+	/**
708	+	* Returns the shortest timed delay. This can be scaled up for
709	+	* slow machines using the jsr166.delay.factor system property,
710	+	* or via jtreg's -timeoutFactor: flag.
711	+	* http://openjdk.java.net/jtreg/command-help.html
712	+	*/
713	+	protected long getShortDelay() {
714	+	return (long) (50 * delayFactor);
715	+	}
716
717		/**
718	<	* Set delays as multiples fo SHORT_DELAY.
718	>	* Sets delays as multiples of SHORT_DELAY.
719		*/
720	<	protected  void setDelays() {
720	>	protected void setDelays() {
721		SHORT_DELAY_MS = getShortDelay();
722	<	SMALL_DELAY_MS = SHORT_DELAY_MS * 5;
722	>	SMALL_DELAY_MS  = SHORT_DELAY_MS * 5;
723		MEDIUM_DELAY_MS = SHORT_DELAY_MS * 10;
724	<	LONG_DELAY_MS = SHORT_DELAY_MS * 50;
724	>	LONG_DELAY_MS   = SHORT_DELAY_MS * 200;
725	>	LONGER_DELAY_MS = 2 * LONG_DELAY_MS;
726	>	}
727	>
728	>	private static final long TIMEOUT_DELAY_MS
729	>	= (long) (12.0 * Math.cbrt(delayFactor));
730	>
731	>	/**
732	>	* Returns a timeout in milliseconds to be used in tests that verify
733	>	* that operations block or time out.  We want this to be longer
734	>	* than the OS scheduling quantum, but not too long, so don't scale
735	>	* linearly with delayFactor; we use "crazy" cube root instead.
736	>	*/
737	>	static long timeoutMillis() {
738	>	return TIMEOUT_DELAY_MS;
739	>	}
740	>
741	>	/**
742	>	* Returns a new Date instance representing a time at least
743	>	* delayMillis milliseconds in the future.
744	>	*/
745	>	Date delayedDate(long delayMillis) {
746	>	// Add 1 because currentTimeMillis is known to round into the past.
747	>	return new Date(System.currentTimeMillis() + delayMillis + 1);
748		}
749
750		/**
751	<	* Flag set true if any threadAssert methods fail
751	>	* The first exception encountered if any threadAssertXXX method fails.
752		*/
753	<	protected volatile boolean threadFailed;
753	>	private final AtomicReference<Throwable> threadFailure
754	>	= new AtomicReference<>(null);
755
756		/**
757	<	* Initialize test to indicate that no thread assertions have failed
757	>	* Records an exception so that it can be rethrown later in the test
758	>	* harness thread, triggering a test case failure.  Only the first
759	>	* failure is recorded; subsequent calls to this method from within
760	>	* the same test have no effect.
761		*/
762	<	public void setUp() {
762	>	public void threadRecordFailure(Throwable t) {
763	>	System.err.println(t);
764	>	if (threadFailure.compareAndSet(null, t))
765	>	dumpTestThreads();
766	>	}
767	>
768	>	public void setUp() {
769		setDelays();
770	<	threadFailed = false;
770	>	}
771	>
772	>	void tearDownFail(String format, Object... args) {
773	>	String msg = toString() + ": " + String.format(format, args);
774	>	System.err.println(msg);
775	>	dumpTestThreads();
776	>	throw new AssertionError(msg);
777		}
778
779		/**
780	<	* Trigger test case failure if any thread assertions have failed
780	>	* Extra checks that get done for all test cases.
781	>	*
782	>	* Triggers test case failure if any thread assertions have failed,
783	>	* by rethrowing, in the test harness thread, any exception recorded
784	>	* earlier by threadRecordFailure.
785	>	*
786	>	* Triggers test case failure if interrupt status is set in the main thread.
787		*/
788	<	public void tearDown() {
789	<	assertFalse(threadFailed);
788	>	public void tearDown() throws Exception {
789	>	Throwable t = threadFailure.getAndSet(null);
790	>	if (t != null) {
791	>	if (t instanceof Error)
792	>	throw (Error) t;
793	>	else if (t instanceof RuntimeException)
794	>	throw (RuntimeException) t;
795	>	else if (t instanceof Exception)
796	>	throw (Exception) t;
797	>	else
798	>	throw new AssertionError(t.toString(), t);
799	>	}
800	>
801	>	if (Thread.interrupted())
802	>	tearDownFail("interrupt status set in main thread");
803	>
804	>	checkForkJoinPoolThreadLeaks();
805		}
806
807	+	/**
808	+	* Finds missing PoolCleaners
809	+	*/
810	+	void checkForkJoinPoolThreadLeaks() throws InterruptedException {
811	+	Thread[] survivors = new Thread[7];
812	+	int count = Thread.enumerate(survivors);
813	+	for (int i = 0; i < count; i++) {
814	+	Thread thread = survivors[i];
815	+	String name = thread.getName();
816	+	if (name.startsWith("ForkJoinPool-")) {
817	+	// give thread some time to terminate
818	+	thread.join(LONG_DELAY_MS);
819	+	if (thread.isAlive())
820	+	tearDownFail("Found leaked ForkJoinPool thread thread=%s",
821	+	thread);
822	+	}
823	+	}
824	+
825	+	if (!ForkJoinPool.commonPool()
826	+	.awaitQuiescence(LONG_DELAY_MS, MILLISECONDS))
827	+	tearDownFail("ForkJoin common pool thread stuck");
828	+	}
829	+
830	+	/**
831	+	* Just like fail(reason), but additionally recording (using
832	+	* threadRecordFailure) any AssertionError thrown, so that the
833	+	* current testcase will fail.
834	+	*/
835		public void threadFail(String reason) {
836	<	threadFailed = true;
837	<	fail(reason);
836	>	try {
837	>	fail(reason);
838	>	} catch (AssertionError fail) {
839	>	threadRecordFailure(fail);
840	>	throw fail;
841	>	}
842		}
843
844	+	/**
845	+	* Just like assertTrue(b), but additionally recording (using
846	+	* threadRecordFailure) any AssertionError thrown, so that the
847	+	* current testcase will fail.
848	+	*/
849		public void threadAssertTrue(boolean b) {
850	<	if (!b) {
108	<	threadFailed = true;
850	>	try {
851		assertTrue(b);
852	+	} catch (AssertionError fail) {
853	+	threadRecordFailure(fail);
854	+	throw fail;
855		}
856		}
857	+
858	+	/**
859	+	* Just like assertFalse(b), but additionally recording (using
860	+	* threadRecordFailure) any AssertionError thrown, so that the
861	+	* current testcase will fail.
862	+	*/
863		public void threadAssertFalse(boolean b) {
864	<	if (b) {
114	<	threadFailed = true;
864	>	try {
865		assertFalse(b);
866	+	} catch (AssertionError fail) {
867	+	threadRecordFailure(fail);
868	+	throw fail;
869		}
870		}
871	+
872	+	/**
873	+	* Just like assertNull(x), but additionally recording (using
874	+	* threadRecordFailure) any AssertionError thrown, so that the
875	+	* current testcase will fail.
876	+	*/
877		public void threadAssertNull(Object x) {
878	<	if (x != null) {
120	<	threadFailed = true;
878	>	try {
879		assertNull(x);
880	+	} catch (AssertionError fail) {
881	+	threadRecordFailure(fail);
882	+	throw fail;
883		}
884		}
885	+
886	+	/**
887	+	* Just like assertEquals(x, y), but additionally recording (using
888	+	* threadRecordFailure) any AssertionError thrown, so that the
889	+	* current testcase will fail.
890	+	*/
891		public void threadAssertEquals(long x, long y) {
892	<	if (x != y) {
126	<	threadFailed = true;
892	>	try {
893		assertEquals(x, y);
894	+	} catch (AssertionError fail) {
895	+	threadRecordFailure(fail);
896	+	throw fail;
897		}
898		}
899	+
900	+	/**
901	+	* Just like assertEquals(x, y), but additionally recording (using
902	+	* threadRecordFailure) any AssertionError thrown, so that the
903	+	* current testcase will fail.
904	+	*/
905		public void threadAssertEquals(Object x, Object y) {
906	<	if (x != y && (x == null || !x.equals(y))) {
132	<	threadFailed = true;
906	>	try {
907		assertEquals(x, y);
908	+	} catch (AssertionError fail) {
909	+	threadRecordFailure(fail);
910	+	throw fail;
911	+	} catch (Throwable fail) {
912	+	threadUnexpectedException(fail);
913		}
914		}
915
916	+	/**
917	+	* Just like assertSame(x, y), but additionally recording (using
918	+	* threadRecordFailure) any AssertionError thrown, so that the
919	+	* current testcase will fail.
920	+	*/
921	+	public void threadAssertSame(Object x, Object y) {
922	+	try {
923	+	assertSame(x, y);
924	+	} catch (AssertionError fail) {
925	+	threadRecordFailure(fail);
926	+	throw fail;
927	+	}
928	+	}
929	+
930	+	/**
931	+	* Calls threadFail with message "should throw exception".
932	+	*/
933		public void threadShouldThrow() {
934	<	threadFailed = true;
139	<	fail("should throw exception");
934	>	threadFail("should throw exception");
935		}
936
937	<	public void threadUnexpectedException() {
938	<	threadFailed = true;
939	<	fail("Unexpected exception");
937	>	/**
938	>	* Calls threadFail with message "should throw" + exceptionName.
939	>	*/
940	>	public void threadShouldThrow(String exceptionName) {
941	>	threadFail("should throw " + exceptionName);
942		}
943
944	+	/**
945	+	* Records the given exception using {@link #threadRecordFailure},
946	+	* then rethrows the exception, wrapping it in an AssertionError
947	+	* if necessary.
948	+	*/
949	+	public void threadUnexpectedException(Throwable t) {
950	+	threadRecordFailure(t);
951	+	t.printStackTrace();
952	+	if (t instanceof RuntimeException)
953	+	throw (RuntimeException) t;
954	+	else if (t instanceof Error)
955	+	throw (Error) t;
956	+	else
957	+	throw new AssertionError("unexpected exception: " + t, t);
958	+	}
959	+
960	+	/**
961	+	* Delays, via Thread.sleep, for the given millisecond delay, but
962	+	* if the sleep is shorter than specified, may re-sleep or yield
963	+	* until time elapses.  Ensures that the given time, as measured
964	+	* by System.nanoTime(), has elapsed.
965	+	*/
966	+	static void delay(long millis) throws InterruptedException {
967	+	long nanos = millis * (1000 * 1000);
968	+	final long wakeupTime = System.nanoTime() + nanos;
969	+	do {
970	+	if (millis > 0L)
971	+	Thread.sleep(millis);
972	+	else // too short to sleep
973	+	Thread.yield();
974	+	nanos = wakeupTime - System.nanoTime();
975	+	millis = nanos / (1000 * 1000);
976	+	} while (nanos >= 0L);
977	+	}
978	+
979	+	/**
980	+	* Allows use of try-with-resources with per-test thread pools.
981	+	*/
982	+	class PoolCleaner implements AutoCloseable {
983	+	private final ExecutorService pool;
984	+	public PoolCleaner(ExecutorService pool) { this.pool = pool; }
985	+	public void close() { joinPool(pool); }
986	+	}
987
988		/**
989	<	* Wait out termination of a thread pool or fail doing so
989	>	* An extension of PoolCleaner that has an action to release the pool.
990		*/
991	<	public void joinPool(ExecutorService exec) {
991	>	class PoolCleanerWithReleaser extends PoolCleaner {
992	>	private final Runnable releaser;
993	>	public PoolCleanerWithReleaser(ExecutorService pool, Runnable releaser) {
994	>	super(pool);
995	>	this.releaser = releaser;
996	>	}
997	>	public void close() {
998	>	try {
999	>	releaser.run();
1000	>	} finally {
1001	>	super.close();
1002	>	}
1003	>	}
1004	>	}
1005	>
1006	>	PoolCleaner cleaner(ExecutorService pool) {
1007	>	return new PoolCleaner(pool);
1008	>	}
1009	>
1010	>	PoolCleaner cleaner(ExecutorService pool, Runnable releaser) {
1011	>	return new PoolCleanerWithReleaser(pool, releaser);
1012	>	}
1013	>
1014	>	PoolCleaner cleaner(ExecutorService pool, CountDownLatch latch) {
1015	>	return new PoolCleanerWithReleaser(pool, releaser(latch));
1016	>	}
1017	>
1018	>	Runnable releaser(final CountDownLatch latch) {
1019	>	return new Runnable() { public void run() {
1020	>	do { latch.countDown(); }
1021	>	while (latch.getCount() > 0);
1022	>	}};
1023	>	}
1024	>
1025	>	PoolCleaner cleaner(ExecutorService pool, AtomicBoolean flag) {
1026	>	return new PoolCleanerWithReleaser(pool, releaser(flag));
1027	>	}
1028	>
1029	>	Runnable releaser(final AtomicBoolean flag) {
1030	>	return new Runnable() { public void run() { flag.set(true); }};
1031	>	}
1032	>
1033	>	/**
1034	>	* Waits out termination of a thread pool or fails doing so.
1035	>	*/
1036	>	void joinPool(ExecutorService pool) {
1037		try {
1038	<	exec.shutdown();
1039	<	assertTrue(exec.awaitTermination(LONG_DELAY_MS, TimeUnit.MILLISECONDS));
1040	<	} catch(InterruptedException ie) {
1041	<	fail("Unexpected exception");
1038	>	pool.shutdown();
1039	>	if (!pool.awaitTermination(2 * LONG_DELAY_MS, MILLISECONDS)) {
1040	>	try {
1041	>	threadFail("ExecutorService " + pool +
1042	>	" did not terminate in a timely manner");
1043	>	} finally {
1044	>	// last resort, for the benefit of subsequent tests
1045	>	pool.shutdownNow();
1046	>	pool.awaitTermination(MEDIUM_DELAY_MS, MILLISECONDS);
1047	>	}
1048	>	}
1049	>	} catch (SecurityException ok) {
1050	>	// Allowed in case test doesn't have privs
1051	>	} catch (InterruptedException fail) {
1052	>	threadFail("Unexpected InterruptedException");
1053		}
1054		}
1055
1056	<
1056	>	/**
1057	>	* Like Runnable, but with the freedom to throw anything.
1058	>	* junit folks had the same idea:
1059	>	* http://junit.org/junit5/docs/snapshot/api/org/junit/gen5/api/Executable.html
1060	>	*/
1061	>	interface Action { public void run() throws Throwable; }
1062	>
1063	>	/**
1064	>	* Runs all the given actions in parallel, failing if any fail.
1065	>	* Useful for running multiple variants of tests that are
1066	>	* necessarily individually slow because they must block.
1067	>	*/
1068	>	void testInParallel(Action ... actions) {
1069	>	ExecutorService pool = Executors.newCachedThreadPool();
1070	>	try (PoolCleaner cleaner = cleaner(pool)) {
1071	>	ArrayList<Future<?>> futures = new ArrayList<>(actions.length);
1072	>	for (final Action action : actions)
1073	>	futures.add(pool.submit(new CheckedRunnable() {
1074	>	public void realRun() throws Throwable { action.run();}}));
1075	>	for (Future<?> future : futures)
1076	>	try {
1077	>	assertNull(future.get(LONG_DELAY_MS, MILLISECONDS));
1078	>	} catch (ExecutionException ex) {
1079	>	threadUnexpectedException(ex.getCause());
1080	>	} catch (Exception ex) {
1081	>	threadUnexpectedException(ex);
1082	>	}
1083	>	}
1084	>	}
1085	>
1086	>	/** Returns true if thread info might be useful in a thread dump. */
1087	>	static boolean threadOfInterest(ThreadInfo info) {
1088	>	final String name = info.getThreadName();
1089	>	String lockName;
1090	>	if (name == null)
1091	>	return true;
1092	>	if (name.equals("Signal Dispatcher")
1093	>	|| name.equals("WedgedTestDetector"))
1094	>	return false;
1095	>	if (name.equals("Reference Handler")) {
1096	>	// Reference Handler stacktrace changed in JDK-8156500
1097	>	StackTraceElement[] stackTrace; String methodName;
1098	>	if ((stackTrace = info.getStackTrace()) != null
1099	>	&& stackTrace.length > 0
1100	>	&& (methodName = stackTrace[0].getMethodName()) != null
1101	>	&& methodName.equals("waitForReferencePendingList"))
1102	>	return false;
1103	>	// jdk8 Reference Handler stacktrace
1104	>	if ((lockName = info.getLockName()) != null
1105	>	&& lockName.startsWith("java.lang.ref"))
1106	>	return false;
1107	>	}
1108	>	if ((name.equals("Finalizer") || name.equals("Common-Cleaner"))
1109	>	&& (lockName = info.getLockName()) != null
1110	>	&& lockName.startsWith("java.lang.ref"))
1111	>	return false;
1112	>	if (name.startsWith("ForkJoinPool.commonPool-worker")
1113	>	&& (lockName = info.getLockName()) != null
1114	>	&& lockName.startsWith("java.util.concurrent.ForkJoinPool"))
1115	>	return false;
1116	>	return true;
1117	>	}
1118	>
1119	>	/**
1120	>	* A debugging tool to print stack traces of most threads, as jstack does.
1121	>	* Uninteresting threads are filtered out.
1122	>	*/
1123	>	static void dumpTestThreads() {
1124	>	SecurityManager sm = System.getSecurityManager();
1125	>	if (sm != null) {
1126	>	try {
1127	>	System.setSecurityManager(null);
1128	>	} catch (SecurityException giveUp) {
1129	>	return;
1130	>	}
1131	>	}
1132	>
1133	>	ThreadMXBean threadMXBean = ManagementFactory.getThreadMXBean();
1134	>	System.err.println("------ stacktrace dump start ------");
1135	>	for (ThreadInfo info : threadMXBean.dumpAllThreads(true, true))
1136	>	if (threadOfInterest(info))
1137	>	System.err.print(info);
1138	>	System.err.println("------ stacktrace dump end ------");
1139	>
1140	>	if (sm != null) System.setSecurityManager(sm);
1141	>	}
1142	>
1143	>	/**
1144	>	* Checks that thread eventually enters the expected blocked thread state.
1145	>	*/
1146	>	void assertThreadBlocks(Thread thread, Thread.State expected) {
1147	>	// always sleep at least 1 ms, with high probability avoiding
1148	>	// transitory states
1149	>	for (long retries = LONG_DELAY_MS * 3 / 4; retries-->0; ) {
1150	>	try { delay(1); }
1151	>	catch (InterruptedException fail) {
1152	>	throw new AssertionError("Unexpected InterruptedException", fail);
1153	>	}
1154	>	Thread.State s = thread.getState();
1155	>	if (s == expected)
1156	>	return;
1157	>	else if (s == Thread.State.TERMINATED)
1158	>	fail("Unexpected thread termination");
1159	>	}
1160	>	fail("timed out waiting for thread to enter thread state " + expected);
1161	>	}
1162	>
1163	>	/**
1164	>	* Checks that future.get times out, with the default timeout of
1165	>	* {@code timeoutMillis()}.
1166	>	*/
1167	>	void assertFutureTimesOut(Future future) {
1168	>	assertFutureTimesOut(future, timeoutMillis());
1169	>	}
1170	>
1171	>	/**
1172	>	* Checks that future.get times out, with the given millisecond timeout.
1173	>	*/
1174	>	void assertFutureTimesOut(Future future, long timeoutMillis) {
1175	>	long startTime = System.nanoTime();
1176	>	try {
1177	>	future.get(timeoutMillis, MILLISECONDS);
1178	>	shouldThrow();
1179	>	} catch (TimeoutException success) {
1180	>	} catch (Exception fail) {
1181	>	threadUnexpectedException(fail);
1182	>	} finally { future.cancel(true); }
1183	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
1184	>	}
1185	>
1186	>	/**
1187	>	* Fails with message "should throw exception".
1188	>	*/
1189		public void shouldThrow() {
1190		fail("Should throw exception");
1191		}
1192
1193	<	public void unexpectedException() {
1194	<	fail("Unexpected exception");
1193	>	/**
1194	>	* Fails with message "should throw " + exceptionName.
1195	>	*/
1196	>	public void shouldThrow(String exceptionName) {
1197	>	fail("Should throw " + exceptionName);
1198		}
1199
1200	+	/**
1201	+	* The maximum number of consecutive spurious wakeups we should
1202	+	* tolerate (from APIs like LockSupport.park) before failing a test.
1203	+	*/
1204	+	static final int MAX_SPURIOUS_WAKEUPS = 10;
1205
1206		/**
1207		* The number of elements to place in collections, arrays, etc.
#	Line 174 | Line 1210 | public class JSR166TestCase extends Test
1210
1211		// Some convenient Integer constants
1212
1213	<	public static final Integer zero = new Integer(0);
1214	<	public static final Integer one = new Integer(1);
1215	<	public static final Integer two = new Integer(2);
1216	<	public static final Integer three  = new Integer(3);
1213	>	public static final Integer zero  = new Integer(0);
1214	>	public static final Integer one   = new Integer(1);
1215	>	public static final Integer two   = new Integer(2);
1216	>	public static final Integer three = new Integer(3);
1217		public static final Integer four  = new Integer(4);
1218		public static final Integer five  = new Integer(5);
1219	<	public static final Integer six = new Integer(6);
1219	>	public static final Integer six   = new Integer(6);
1220		public static final Integer seven = new Integer(7);
1221		public static final Integer eight = new Integer(8);
1222	<	public static final Integer nine = new Integer(9);
1222	>	public static final Integer nine  = new Integer(9);
1223		public static final Integer m1  = new Integer(-1);
1224		public static final Integer m2  = new Integer(-2);
1225		public static final Integer m3  = new Integer(-3);
1226	<	public static final Integer m4 = new Integer(-4);
1227	<	public static final Integer m5 = new Integer(-5);
1226	>	public static final Integer m4  = new Integer(-4);
1227	>	public static final Integer m5  = new Integer(-5);
1228	>	public static final Integer m6  = new Integer(-6);
1229		public static final Integer m10 = new Integer(-10);
1230
1231	+	/**
1232	+	* Runs Runnable r with a security policy that permits precisely
1233	+	* the specified permissions.  If there is no current security
1234	+	* manager, the runnable is run twice, both with and without a
1235	+	* security manager.  We require that any security manager permit
1236	+	* getPolicy/setPolicy.
1237	+	*/
1238	+	public void runWithPermissions(Runnable r, Permission... permissions) {
1239	+	SecurityManager sm = System.getSecurityManager();
1240	+	if (sm == null) {
1241	+	r.run();
1242	+	}
1243	+	runWithSecurityManagerWithPermissions(r, permissions);
1244	+	}
1245
1246	<	// Some convenient Runnable classes
1246	>	/**
1247	>	* Runs Runnable r with a security policy that permits precisely
1248	>	* the specified permissions.  If there is no current security
1249	>	* manager, a temporary one is set for the duration of the
1250	>	* Runnable.  We require that any security manager permit
1251	>	* getPolicy/setPolicy.
1252	>	*/
1253	>	public void runWithSecurityManagerWithPermissions(Runnable r,
1254	>	Permission... permissions) {
1255	>	SecurityManager sm = System.getSecurityManager();
1256	>	if (sm == null) {
1257	>	Policy savedPolicy = Policy.getPolicy();
1258	>	try {
1259	>	Policy.setPolicy(permissivePolicy());
1260	>	System.setSecurityManager(new SecurityManager());
1261	>	runWithSecurityManagerWithPermissions(r, permissions);
1262	>	} finally {
1263	>	System.setSecurityManager(null);
1264	>	Policy.setPolicy(savedPolicy);
1265	>	}
1266	>	} else {
1267	>	Policy savedPolicy = Policy.getPolicy();
1268	>	AdjustablePolicy policy = new AdjustablePolicy(permissions);
1269	>	Policy.setPolicy(policy);
1270
1271	<	public static class NoOpRunnable implements Runnable {
1272	<	public void run() {}
1271	>	try {
1272	>	r.run();
1273	>	} finally {
1274	>	policy.addPermission(new SecurityPermission("setPolicy"));
1275	>	Policy.setPolicy(savedPolicy);
1276	>	}
1277	>	}
1278		}
1279
1280	<	public static class NoOpCallable implements Callable {
1281	<	public Object call() { return Boolean.TRUE; }
1280	>	/**
1281	>	* Runs a runnable without any permissions.
1282	>	*/
1283	>	public void runWithoutPermissions(Runnable r) {
1284	>	runWithPermissions(r);
1285		}
1286
1287	<	public class ShortRunnable implements Runnable {
1288	<	public void run() {
1289	<	try {
1290	<	Thread.sleep(SHORT_DELAY_MS);
1287	>	/**
1288	>	* A security policy where new permissions can be dynamically added
1289	>	* or all cleared.
1290	>	*/
1291	>	public static class AdjustablePolicy extends java.security.Policy {
1292	>	Permissions perms = new Permissions();
1293	>	AdjustablePolicy(Permission... permissions) {
1294	>	for (Permission permission : permissions)
1295	>	perms.add(permission);
1296	>	}
1297	>	void addPermission(Permission perm) { perms.add(perm); }
1298	>	void clearPermissions() { perms = new Permissions(); }
1299	>	public PermissionCollection getPermissions(CodeSource cs) {
1300	>	return perms;
1301	>	}
1302	>	public PermissionCollection getPermissions(ProtectionDomain pd) {
1303	>	return perms;
1304	>	}
1305	>	public boolean implies(ProtectionDomain pd, Permission p) {
1306	>	return perms.implies(p);
1307	>	}
1308	>	public void refresh() {}
1309	>	public String toString() {
1310	>	List<Permission> ps = new ArrayList<>();
1311	>	for (Enumeration<Permission> e = perms.elements(); e.hasMoreElements();)
1312	>	ps.add(e.nextElement());
1313	>	return "AdjustablePolicy with permissions " + ps;
1314	>	}
1315	>	}
1316	>
1317	>	/**
1318	>	* Returns a policy containing all the permissions we ever need.
1319	>	*/
1320	>	public static Policy permissivePolicy() {
1321	>	return new AdjustablePolicy
1322	>	// Permissions j.u.c. needs directly
1323	>	(new RuntimePermission("modifyThread"),
1324	>	new RuntimePermission("getClassLoader"),
1325	>	new RuntimePermission("setContextClassLoader"),
1326	>	// Permissions needed to change permissions!
1327	>	new SecurityPermission("getPolicy"),
1328	>	new SecurityPermission("setPolicy"),
1329	>	new RuntimePermission("setSecurityManager"),
1330	>	// Permissions needed by the junit test harness
1331	>	new RuntimePermission("accessDeclaredMembers"),
1332	>	new PropertyPermission("*", "read"),
1333	>	new java.io.FilePermission("<<ALL FILES>>", "read"));
1334	>	}
1335	>
1336	>	/**
1337	>	* Sleeps until the given time has elapsed.
1338	>	* Throws AssertionError if interrupted.
1339	>	*/
1340	>	static void sleep(long millis) {
1341	>	try {
1342	>	delay(millis);
1343	>	} catch (InterruptedException fail) {
1344	>	throw new AssertionError("Unexpected InterruptedException", fail);
1345	>	}
1346	>	}
1347	>
1348	>	/**
1349	>	* Spin-waits up to the specified number of milliseconds for the given
1350	>	* thread to enter a wait state: BLOCKED, WAITING, or TIMED_WAITING.
1351	>	* @param waitingForGodot if non-null, an additional condition to satisfy
1352	>	*/
1353	>	void waitForThreadToEnterWaitState(Thread thread, long timeoutMillis,
1354	>	Callable<Boolean> waitingForGodot) {
1355	>	for (long startTime = 0L;;) {
1356	>	switch (thread.getState()) {
1357	>	default: break;
1358	>	case BLOCKED: case WAITING: case TIMED_WAITING:
1359	>	try {
1360	>	if (waitingForGodot == null || waitingForGodot.call())
1361	>	return;
1362	>	} catch (Throwable fail) { threadUnexpectedException(fail); }
1363	>	break;
1364	>	case TERMINATED:
1365	>	fail("Unexpected thread termination");
1366		}
1367	<	catch(Exception e) {
1368	<	threadUnexpectedException();
1367	>
1368	>	if (startTime == 0L)
1369	>	startTime = System.nanoTime();
1370	>	else if (millisElapsedSince(startTime) > timeoutMillis) {
1371	>	assertTrue(thread.isAlive());
1372	>	if (waitingForGodot == null
1373	>	|| thread.getState() == Thread.State.RUNNABLE)
1374	>	fail("timed out waiting for thread to enter wait state");
1375	>	else
1376	>	fail("timed out waiting for condition, thread state="
1377	>	+ thread.getState());
1378		}
1379	+	Thread.yield();
1380		}
1381		}
1382
1383	<	public class ShortInterruptedRunnable implements Runnable {
1384	<	public void run() {
1383	>	/**
1384	>	* Spin-waits up to the specified number of milliseconds for the given
1385	>	* thread to enter a wait state: BLOCKED, WAITING, or TIMED_WAITING.
1386	>	*/
1387	>	void waitForThreadToEnterWaitState(Thread thread, long timeoutMillis) {
1388	>	waitForThreadToEnterWaitState(thread, timeoutMillis, null);
1389	>	}
1390	>
1391	>	/**
1392	>	* Spin-waits up to LONG_DELAY_MS milliseconds for the given thread to
1393	>	* enter a wait state: BLOCKED, WAITING, or TIMED_WAITING.
1394	>	*/
1395	>	void waitForThreadToEnterWaitState(Thread thread) {
1396	>	waitForThreadToEnterWaitState(thread, LONG_DELAY_MS, null);
1397	>	}
1398	>
1399	>	/**
1400	>	* Spin-waits up to LONG_DELAY_MS milliseconds for the given thread to
1401	>	* enter a wait state: BLOCKED, WAITING, or TIMED_WAITING,
1402	>	* and additionally satisfy the given condition.
1403	>	*/
1404	>	void waitForThreadToEnterWaitState(Thread thread,
1405	>	Callable<Boolean> waitingForGodot) {
1406	>	waitForThreadToEnterWaitState(thread, LONG_DELAY_MS, waitingForGodot);
1407	>	}
1408	>
1409	>	/**
1410	>	* Spin-waits up to LONG_DELAY_MS milliseconds for the current thread to
1411	>	* be interrupted.  Clears the interrupt status before returning.
1412	>	*/
1413	>	void awaitInterrupted() {
1414	>	for (long startTime = 0L; !Thread.interrupted(); ) {
1415	>	if (startTime == 0L)
1416	>	startTime = System.nanoTime();
1417	>	else if (millisElapsedSince(startTime) > LONG_DELAY_MS)
1418	>	fail("timed out waiting for thread interrupt");
1419	>	Thread.yield();
1420	>	}
1421	>	}
1422	>
1423	>	/**
1424	>	* Returns the number of milliseconds since time given by
1425	>	* startNanoTime, which must have been previously returned from a
1426	>	* call to {@link System#nanoTime()}.
1427	>	*/
1428	>	static long millisElapsedSince(long startNanoTime) {
1429	>	return NANOSECONDS.toMillis(System.nanoTime() - startNanoTime);
1430	>	}
1431	>
1432	>	/**
1433	>	* Checks that timed f.get() returns the expected value, and does not
1434	>	* wait for the timeout to elapse before returning.
1435	>	*/
1436	>	<T> void checkTimedGet(Future<T> f, T expectedValue, long timeoutMillis) {
1437	>	long startTime = System.nanoTime();
1438	>	T actual = null;
1439	>	try {
1440	>	actual = f.get(timeoutMillis, MILLISECONDS);
1441	>	} catch (Throwable fail) { threadUnexpectedException(fail); }
1442	>	assertEquals(expectedValue, actual);
1443	>	if (millisElapsedSince(startTime) > timeoutMillis/2)
1444	>	throw new AssertionError("timed get did not return promptly");
1445	>	}
1446	>
1447	>	<T> void checkTimedGet(Future<T> f, T expectedValue) {
1448	>	checkTimedGet(f, expectedValue, LONG_DELAY_MS);
1449	>	}
1450	>
1451	>	/**
1452	>	* Returns a new started daemon Thread running the given runnable.
1453	>	*/
1454	>	Thread newStartedThread(Runnable runnable) {
1455	>	Thread t = new Thread(runnable);
1456	>	t.setDaemon(true);
1457	>	t.start();
1458	>	return t;
1459	>	}
1460	>
1461	>	/**
1462	>	* Waits for the specified time (in milliseconds) for the thread
1463	>	* to terminate (using {@link Thread#join(long)}), else interrupts
1464	>	* the thread (in the hope that it may terminate later) and fails.
1465	>	*/
1466	>	void awaitTermination(Thread thread, long timeoutMillis) {
1467	>	try {
1468	>	thread.join(timeoutMillis);
1469	>	} catch (InterruptedException fail) {
1470	>	threadUnexpectedException(fail);
1471	>	}
1472	>	if (thread.getState() != Thread.State.TERMINATED) {
1473	>	String detail = String.format(
1474	>	"timed out waiting for thread to terminate, thread=%s, state=%s" ,
1475	>	thread, thread.getState());
1476		try {
1477	<	Thread.sleep(SHORT_DELAY_MS);
1478	<	threadShouldThrow();
1479	<	}
1480	<	catch(InterruptedException success) {
1477	>	threadFail(detail);
1478	>	} finally {
1479	>	// Interrupt thread __after__ having reported its stack trace
1480	>	thread.interrupt();
1481		}
1482		}
1483		}
1484
1485	<	public class SmallRunnable implements Runnable {
1486	<	public void run() {
1485	>	/**
1486	>	* Waits for LONG_DELAY_MS milliseconds for the thread to
1487	>	* terminate (using {@link Thread#join(long)}), else interrupts
1488	>	* the thread (in the hope that it may terminate later) and fails.
1489	>	*/
1490	>	void awaitTermination(Thread t) {
1491	>	awaitTermination(t, LONG_DELAY_MS);
1492	>	}
1493	>
1494	>	// Some convenient Runnable classes
1495	>
1496	>	public abstract class CheckedRunnable implements Runnable {
1497	>	protected abstract void realRun() throws Throwable;
1498	>
1499	>	public final void run() {
1500		try {
1501	<	Thread.sleep(SMALL_DELAY_MS);
1502	<	}
1503	<	catch(Exception e) {
233	<	threadUnexpectedException();
1501	>	realRun();
1502	>	} catch (Throwable fail) {
1503	>	threadUnexpectedException(fail);
1504		}
1505		}
1506		}
1507
1508	<	public class SmallCallable implements Callable {
1509	<	public Object call() {
1508	>	public abstract class ThreadShouldThrow extends Thread {
1509	>	protected abstract void realRun() throws Throwable;
1510	>
1511	>	final Class<?> exceptionClass;
1512	>
1513	>	<T extends Throwable> ThreadShouldThrow(Class<T> exceptionClass) {
1514	>	this.exceptionClass = exceptionClass;
1515	>	}
1516	>
1517	>	public final void run() {
1518		try {
1519	<	Thread.sleep(SMALL_DELAY_MS);
1519	>	realRun();
1520	>	} catch (Throwable t) {
1521	>	if (! exceptionClass.isInstance(t))
1522	>	threadUnexpectedException(t);
1523	>	return;
1524		}
1525	<	catch(Exception e) {
244	<	threadUnexpectedException();
245	<	}
246	<	return Boolean.TRUE;
1525	>	threadShouldThrow(exceptionClass.getSimpleName());
1526		}
1527		}
1528
1529	<	public class SmallInterruptedRunnable implements Runnable {
1530	<	public void run() {
1529	>	public abstract class CheckedInterruptedRunnable implements Runnable {
1530	>	protected abstract void realRun() throws Throwable;
1531	>
1532	>	public final void run() {
1533		try {
1534	<	Thread.sleep(SMALL_DELAY_MS);
1535	<	threadShouldThrow();
1534	>	realRun();
1535	>	} catch (InterruptedException success) {
1536	>	threadAssertFalse(Thread.interrupted());
1537	>	return;
1538	>	} catch (Throwable fail) {
1539	>	threadUnexpectedException(fail);
1540		}
1541	<	catch(InterruptedException success) {
1541	>	threadShouldThrow("InterruptedException");
1542	>	}
1543	>	}
1544	>
1545	>	public abstract class CheckedCallable<T> implements Callable<T> {
1546	>	protected abstract T realCall() throws Throwable;
1547	>
1548	>	public final T call() {
1549	>	try {
1550	>	return realCall();
1551	>	} catch (Throwable fail) {
1552	>	threadUnexpectedException(fail);
1553		}
1554	+	throw new AssertionError("unreached");
1555		}
1556		}
1557
1558	+	public static class NoOpRunnable implements Runnable {
1559	+	public void run() {}
1560	+	}
1561
1562	<	public class MediumRunnable implements Runnable {
1562	>	public static class NoOpCallable implements Callable {
1563	>	public Object call() { return Boolean.TRUE; }
1564	>	}
1565	>
1566	>	public static final String TEST_STRING = "a test string";
1567	>
1568	>	public static class StringTask implements Callable<String> {
1569	>	final String value;
1570	>	public StringTask() { this(TEST_STRING); }
1571	>	public StringTask(String value) { this.value = value; }
1572	>	public String call() { return value; }
1573	>	}
1574	>
1575	>	public Callable<String> latchAwaitingStringTask(final CountDownLatch latch) {
1576	>	return new CheckedCallable<String>() {
1577	>	protected String realCall() {
1578	>	try {
1579	>	latch.await();
1580	>	} catch (InterruptedException quittingTime) {}
1581	>	return TEST_STRING;
1582	>	}};
1583	>	}
1584	>
1585	>	public Runnable countDowner(final CountDownLatch latch) {
1586	>	return new CheckedRunnable() {
1587	>	public void realRun() throws InterruptedException {
1588	>	latch.countDown();
1589	>	}};
1590	>	}
1591	>
1592	>	class LatchAwaiter extends CheckedRunnable {
1593	>	static final int NEW = 0;
1594	>	static final int RUNNING = 1;
1595	>	static final int DONE = 2;
1596	>	final CountDownLatch latch;
1597	>	int state = NEW;
1598	>	LatchAwaiter(CountDownLatch latch) { this.latch = latch; }
1599	>	public void realRun() throws InterruptedException {
1600	>	state = 1;
1601	>	await(latch);
1602	>	state = 2;
1603	>	}
1604	>	}
1605	>
1606	>	public LatchAwaiter awaiter(CountDownLatch latch) {
1607	>	return new LatchAwaiter(latch);
1608	>	}
1609	>
1610	>	public void await(CountDownLatch latch, long timeoutMillis) {
1611	>	boolean timedOut = false;
1612	>	try {
1613	>	timedOut = !latch.await(timeoutMillis, MILLISECONDS);
1614	>	} catch (Throwable fail) {
1615	>	threadUnexpectedException(fail);
1616	>	}
1617	>	if (timedOut)
1618	>	fail("timed out waiting for CountDownLatch for "
1619	>	+ (timeoutMillis/1000) + " sec");
1620	>	}
1621	>
1622	>	public void await(CountDownLatch latch) {
1623	>	await(latch, LONG_DELAY_MS);
1624	>	}
1625	>
1626	>	public void await(Semaphore semaphore) {
1627	>	boolean timedOut = false;
1628	>	try {
1629	>	timedOut = !semaphore.tryAcquire(LONG_DELAY_MS, MILLISECONDS);
1630	>	} catch (Throwable fail) {
1631	>	threadUnexpectedException(fail);
1632	>	}
1633	>	if (timedOut)
1634	>	fail("timed out waiting for Semaphore for "
1635	>	+ (LONG_DELAY_MS/1000) + " sec");
1636	>	}
1637	>
1638	>	public void await(CyclicBarrier barrier) {
1639	>	try {
1640	>	barrier.await(LONG_DELAY_MS, MILLISECONDS);
1641	>	} catch (Throwable fail) {
1642	>	threadUnexpectedException(fail);
1643	>	}
1644	>	}
1645	>
1646	>	//     /**
1647	>	//      * Spin-waits up to LONG_DELAY_MS until flag becomes true.
1648	>	//      */
1649	>	//     public void await(AtomicBoolean flag) {
1650	>	//         await(flag, LONG_DELAY_MS);
1651	>	//     }
1652	>
1653	>	//     /**
1654	>	//      * Spin-waits up to the specified timeout until flag becomes true.
1655	>	//      */
1656	>	//     public void await(AtomicBoolean flag, long timeoutMillis) {
1657	>	//         long startTime = System.nanoTime();
1658	>	//         while (!flag.get()) {
1659	>	//             if (millisElapsedSince(startTime) > timeoutMillis)
1660	>	//                 throw new AssertionError("timed out");
1661	>	//             Thread.yield();
1662	>	//         }
1663	>	//     }
1664	>
1665	>	public static class NPETask implements Callable<String> {
1666	>	public String call() { throw new NullPointerException(); }
1667	>	}
1668	>
1669	>	public Runnable possiblyInterruptedRunnable(final long timeoutMillis) {
1670	>	return new CheckedRunnable() {
1671	>	protected void realRun() {
1672	>	try {
1673	>	delay(timeoutMillis);
1674	>	} catch (InterruptedException ok) {}
1675	>	}};
1676	>	}
1677	>
1678	>	/**
1679	>	* For use as ThreadFactory in constructors
1680	>	*/
1681	>	public static class SimpleThreadFactory implements ThreadFactory {
1682	>	public Thread newThread(Runnable r) {
1683	>	return new Thread(r);
1684	>	}
1685	>	}
1686	>
1687	>	public interface TrackedRunnable extends Runnable {
1688	>	boolean isDone();
1689	>	}
1690	>
1691	>	public static class TrackedNoOpRunnable implements Runnable {
1692	>	public volatile boolean done = false;
1693		public void run() {
1694	+	done = true;
1695	+	}
1696	+	}
1697	+
1698	+	/**
1699	+	* Analog of CheckedRunnable for RecursiveAction
1700	+	*/
1701	+	public abstract class CheckedRecursiveAction extends RecursiveAction {
1702	+	protected abstract void realCompute() throws Throwable;
1703	+
1704	+	@Override protected final void compute() {
1705		try {
1706	<	Thread.sleep(MEDIUM_DELAY_MS);
1707	<	}
1708	<	catch(Exception e) {
268	<	threadUnexpectedException();
1706	>	realCompute();
1707	>	} catch (Throwable fail) {
1708	>	threadUnexpectedException(fail);
1709		}
1710		}
1711		}
1712
1713	<	public class MediumInterruptedRunnable implements Runnable {
1714	<	public void run() {
1713	>	/**
1714	>	* Analog of CheckedCallable for RecursiveTask
1715	>	*/
1716	>	public abstract class CheckedRecursiveTask<T> extends RecursiveTask<T> {
1717	>	protected abstract T realCompute() throws Throwable;
1718	>
1719	>	@Override protected final T compute() {
1720		try {
1721	<	Thread.sleep(MEDIUM_DELAY_MS);
1722	<	threadShouldThrow();
1721	>	return realCompute();
1722	>	} catch (Throwable fail) {
1723	>	threadUnexpectedException(fail);
1724		}
1725	<	catch(InterruptedException success) {
1725	>	throw new AssertionError("unreached");
1726	>	}
1727	>	}
1728	>
1729	>	/**
1730	>	* For use as RejectedExecutionHandler in constructors
1731	>	*/
1732	>	public static class NoOpREHandler implements RejectedExecutionHandler {
1733	>	public void rejectedExecution(Runnable r,
1734	>	ThreadPoolExecutor executor) {}
1735	>	}
1736	>
1737	>	/**
1738	>	* A CyclicBarrier that uses timed await and fails with
1739	>	* AssertionErrors instead of throwing checked exceptions.
1740	>	*/
1741	>	public static class CheckedBarrier extends CyclicBarrier {
1742	>	public CheckedBarrier(int parties) { super(parties); }
1743	>
1744	>	public int await() {
1745	>	try {
1746	>	return super.await(2 * LONG_DELAY_MS, MILLISECONDS);
1747	>	} catch (TimeoutException timedOut) {
1748	>	throw new AssertionError("timed out");
1749	>	} catch (Exception fail) {
1750	>	throw new AssertionError("Unexpected exception: " + fail, fail);
1751		}
1752		}
1753		}
1754
1755	<	public class MediumPossiblyInterruptedRunnable implements Runnable {
1756	<	public void run() {
1755	>	void checkEmpty(BlockingQueue q) {
1756	>	try {
1757	>	assertTrue(q.isEmpty());
1758	>	assertEquals(0, q.size());
1759	>	assertNull(q.peek());
1760	>	assertNull(q.poll());
1761	>	assertNull(q.poll(randomExpiredTimeout(), randomTimeUnit()));
1762	>	assertEquals(q.toString(), "[]");
1763	>	assertTrue(Arrays.equals(q.toArray(), new Object[0]));
1764	>	assertFalse(q.iterator().hasNext());
1765	>	try {
1766	>	q.element();
1767	>	shouldThrow();
1768	>	} catch (NoSuchElementException success) {}
1769	>	try {
1770	>	q.iterator().next();
1771	>	shouldThrow();
1772	>	} catch (NoSuchElementException success) {}
1773		try {
1774	<	Thread.sleep(MEDIUM_DELAY_MS);
1774	>	q.remove();
1775	>	shouldThrow();
1776	>	} catch (NoSuchElementException success) {}
1777	>	} catch (InterruptedException fail) { threadUnexpectedException(fail); }
1778	>	}
1779	>
1780	>	void assertSerialEquals(Object x, Object y) {
1781	>	assertTrue(Arrays.equals(serialBytes(x), serialBytes(y)));
1782	>	}
1783	>
1784	>	void assertNotSerialEquals(Object x, Object y) {
1785	>	assertFalse(Arrays.equals(serialBytes(x), serialBytes(y)));
1786	>	}
1787	>
1788	>	byte[] serialBytes(Object o) {
1789	>	try {
1790	>	ByteArrayOutputStream bos = new ByteArrayOutputStream();
1791	>	ObjectOutputStream oos = new ObjectOutputStream(bos);
1792	>	oos.writeObject(o);
1793	>	oos.flush();
1794	>	oos.close();
1795	>	return bos.toByteArray();
1796	>	} catch (Throwable fail) {
1797	>	threadUnexpectedException(fail);
1798	>	return new byte[0];
1799	>	}
1800	>	}
1801	>
1802	>	void assertImmutable(Object o) {
1803	>	if (o instanceof Collection) {
1804	>	assertThrows(
1805	>	UnsupportedOperationException.class,
1806	>	() -> ((Collection) o).add(null));
1807	>	}
1808	>	}
1809	>
1810	>	@SuppressWarnings("unchecked")
1811	>	<T> T serialClone(T o) {
1812	>	T clone = null;
1813	>	try {
1814	>	ObjectInputStream ois = new ObjectInputStream
1815	>	(new ByteArrayInputStream(serialBytes(o)));
1816	>	clone = (T) ois.readObject();
1817	>	} catch (Throwable fail) {
1818	>	threadUnexpectedException(fail);
1819	>	}
1820	>	if (o == clone) assertImmutable(o);
1821	>	else assertSame(o.getClass(), clone.getClass());
1822	>	return clone;
1823	>	}
1824	>
1825	>	/**
1826	>	* A version of serialClone that leaves error handling (for
1827	>	* e.g. NotSerializableException) up to the caller.
1828	>	*/
1829	>	@SuppressWarnings("unchecked")
1830	>	<T> T serialClonePossiblyFailing(T o)
1831	>	throws ReflectiveOperationException, java.io.IOException {
1832	>	ByteArrayOutputStream bos = new ByteArrayOutputStream();
1833	>	ObjectOutputStream oos = new ObjectOutputStream(bos);
1834	>	oos.writeObject(o);
1835	>	oos.flush();
1836	>	oos.close();
1837	>	ObjectInputStream ois = new ObjectInputStream
1838	>	(new ByteArrayInputStream(bos.toByteArray()));
1839	>	T clone = (T) ois.readObject();
1840	>	if (o == clone) assertImmutable(o);
1841	>	else assertSame(o.getClass(), clone.getClass());
1842	>	return clone;
1843	>	}
1844	>
1845	>	/**
1846	>	* If o implements Cloneable and has a public clone method,
1847	>	* returns a clone of o, else null.
1848	>	*/
1849	>	@SuppressWarnings("unchecked")
1850	>	<T> T cloneableClone(T o) {
1851	>	if (!(o instanceof Cloneable)) return null;
1852	>	final T clone;
1853	>	try {
1854	>	clone = (T) o.getClass().getMethod("clone").invoke(o);
1855	>	} catch (NoSuchMethodException ok) {
1856	>	return null;
1857	>	} catch (ReflectiveOperationException unexpected) {
1858	>	throw new Error(unexpected);
1859	>	}
1860	>	assertNotSame(o, clone); // not 100% guaranteed by spec
1861	>	assertSame(o.getClass(), clone.getClass());
1862	>	return clone;
1863	>	}
1864	>
1865	>	public void assertThrows(Class<? extends Throwable> expectedExceptionClass,
1866	>	Action... throwingActions) {
1867	>	for (Action throwingAction : throwingActions) {
1868	>	boolean threw = false;
1869	>	try { throwingAction.run(); }
1870	>	catch (Throwable t) {
1871	>	threw = true;
1872	>	if (!expectedExceptionClass.isInstance(t))
1873	>	throw new AssertionError(
1874	>	"Expected " + expectedExceptionClass.getName() +
1875	>	", got " + t.getClass().getName(),
1876	>	t);
1877		}
1878	<	catch(InterruptedException success) {
1878	>	if (!threw)
1879	>	shouldThrow(expectedExceptionClass.getName());
1880	>	}
1881	>	}
1882	>
1883	>	public void assertIteratorExhausted(Iterator<?> it) {
1884	>	try {
1885	>	it.next();
1886	>	shouldThrow();
1887	>	} catch (NoSuchElementException success) {}
1888	>	assertFalse(it.hasNext());
1889	>	}
1890	>
1891	>	public <T> Callable<T> callableThrowing(final Exception ex) {
1892	>	return new Callable<T>() { public T call() throws Exception { throw ex; }};
1893	>	}
1894	>
1895	>	public Runnable runnableThrowing(final RuntimeException ex) {
1896	>	return new Runnable() { public void run() { throw ex; }};
1897	>	}
1898	>
1899	>	/** A reusable thread pool to be shared by tests. */
1900	>	static final ExecutorService cachedThreadPool =
1901	>	new ThreadPoolExecutor(0, Integer.MAX_VALUE,
1902	>	1000L, MILLISECONDS,
1903	>	new SynchronousQueue<Runnable>());
1904	>
1905	>	static <T> void shuffle(T[] array) {
1906	>	Collections.shuffle(Arrays.asList(array), ThreadLocalRandom.current());
1907	>	}
1908	>
1909	>	/**
1910	>	* Returns the same String as would be returned by {@link
1911	>	* Object#toString}, whether or not the given object's class
1912	>	* overrides toString().
1913	>	*
1914	>	* @see System#identityHashCode
1915	>	*/
1916	>	static String identityString(Object x) {
1917	>	return x.getClass().getName()
1918	>	+ "@" + Integer.toHexString(System.identityHashCode(x));
1919	>	}
1920	>
1921	>	// --- Shared assertions for Executor tests ---
1922	>
1923	>	/**
1924	>	* Returns maximum number of tasks that can be submitted to given
1925	>	* pool (with bounded queue) before saturation (when submission
1926	>	* throws RejectedExecutionException).
1927	>	*/
1928	>	static final int saturatedSize(ThreadPoolExecutor pool) {
1929	>	BlockingQueue<Runnable> q = pool.getQueue();
1930	>	return pool.getMaximumPoolSize() + q.size() + q.remainingCapacity();
1931	>	}
1932	>
1933	>	@SuppressWarnings("FutureReturnValueIgnored")
1934	>	void assertNullTaskSubmissionThrowsNullPointerException(Executor e) {
1935	>	try {
1936	>	e.execute((Runnable) null);
1937	>	shouldThrow();
1938	>	} catch (NullPointerException success) {}
1939	>
1940	>	if (! (e instanceof ExecutorService)) return;
1941	>	ExecutorService es = (ExecutorService) e;
1942	>	try {
1943	>	es.submit((Runnable) null);
1944	>	shouldThrow();
1945	>	} catch (NullPointerException success) {}
1946	>	try {
1947	>	es.submit((Runnable) null, Boolean.TRUE);
1948	>	shouldThrow();
1949	>	} catch (NullPointerException success) {}
1950	>	try {
1951	>	es.submit((Callable) null);
1952	>	shouldThrow();
1953	>	} catch (NullPointerException success) {}
1954	>
1955	>	if (! (e instanceof ScheduledExecutorService)) return;
1956	>	ScheduledExecutorService ses = (ScheduledExecutorService) e;
1957	>	try {
1958	>	ses.schedule((Runnable) null,
1959	>	randomTimeout(), randomTimeUnit());
1960	>	shouldThrow();
1961	>	} catch (NullPointerException success) {}
1962	>	try {
1963	>	ses.schedule((Callable) null,
1964	>	randomTimeout(), randomTimeUnit());
1965	>	shouldThrow();
1966	>	} catch (NullPointerException success) {}
1967	>	try {
1968	>	ses.scheduleAtFixedRate((Runnable) null,
1969	>	randomTimeout(), LONG_DELAY_MS, MILLISECONDS);
1970	>	shouldThrow();
1971	>	} catch (NullPointerException success) {}
1972	>	try {
1973	>	ses.scheduleWithFixedDelay((Runnable) null,
1974	>	randomTimeout(), LONG_DELAY_MS, MILLISECONDS);
1975	>	shouldThrow();
1976	>	} catch (NullPointerException success) {}
1977	>	}
1978	>
1979	>	void setRejectedExecutionHandler(
1980	>	ThreadPoolExecutor p, RejectedExecutionHandler handler) {
1981	>	p.setRejectedExecutionHandler(handler);
1982	>	assertSame(handler, p.getRejectedExecutionHandler());
1983	>	}
1984	>
1985	>	void assertTaskSubmissionsAreRejected(ThreadPoolExecutor p) {
1986	>	final RejectedExecutionHandler savedHandler = p.getRejectedExecutionHandler();
1987	>	final long savedTaskCount = p.getTaskCount();
1988	>	final long savedCompletedTaskCount = p.getCompletedTaskCount();
1989	>	final int savedQueueSize = p.getQueue().size();
1990	>	final boolean stock = (p.getClass().getClassLoader() == null);
1991	>
1992	>	Runnable r = () -> {};
1993	>	Callable<Boolean> c = () -> Boolean.TRUE;
1994	>
1995	>	class Recorder implements RejectedExecutionHandler {
1996	>	public volatile Runnable r = null;
1997	>	public volatile ThreadPoolExecutor p = null;
1998	>	public void reset() { r = null; p = null; }
1999	>	public void rejectedExecution(Runnable r, ThreadPoolExecutor p) {
2000	>	assertNull(this.r);
2001	>	assertNull(this.p);
2002	>	this.r = r;
2003	>	this.p = p;
2004	>	}
2005	>	}
2006	>
2007	>	// check custom handler is invoked exactly once per task
2008	>	Recorder recorder = new Recorder();
2009	>	setRejectedExecutionHandler(p, recorder);
2010	>	for (int i = 2; i--> 0; ) {
2011	>	recorder.reset();
2012	>	p.execute(r);
2013	>	if (stock && p.getClass() == ThreadPoolExecutor.class)
2014	>	assertSame(r, recorder.r);
2015	>	assertSame(p, recorder.p);
2016	>
2017	>	recorder.reset();
2018	>	assertFalse(p.submit(r).isDone());
2019	>	if (stock) assertTrue(!((FutureTask) recorder.r).isDone());
2020	>	assertSame(p, recorder.p);
2021	>
2022	>	recorder.reset();
2023	>	assertFalse(p.submit(r, Boolean.TRUE).isDone());
2024	>	if (stock) assertTrue(!((FutureTask) recorder.r).isDone());
2025	>	assertSame(p, recorder.p);
2026	>
2027	>	recorder.reset();
2028	>	assertFalse(p.submit(c).isDone());
2029	>	if (stock) assertTrue(!((FutureTask) recorder.r).isDone());
2030	>	assertSame(p, recorder.p);
2031	>
2032	>	if (p instanceof ScheduledExecutorService) {
2033	>	ScheduledExecutorService s = (ScheduledExecutorService) p;
2034	>	ScheduledFuture<?> future;
2035	>
2036	>	recorder.reset();
2037	>	future = s.schedule(r, randomTimeout(), randomTimeUnit());
2038	>	assertFalse(future.isDone());
2039	>	if (stock) assertTrue(!((FutureTask) recorder.r).isDone());
2040	>	assertSame(p, recorder.p);
2041	>
2042	>	recorder.reset();
2043	>	future = s.schedule(c, randomTimeout(), randomTimeUnit());
2044	>	assertFalse(future.isDone());
2045	>	if (stock) assertTrue(!((FutureTask) recorder.r).isDone());
2046	>	assertSame(p, recorder.p);
2047	>
2048	>	recorder.reset();
2049	>	future = s.scheduleAtFixedRate(r, randomTimeout(), LONG_DELAY_MS, MILLISECONDS);
2050	>	assertFalse(future.isDone());
2051	>	if (stock) assertTrue(!((FutureTask) recorder.r).isDone());
2052	>	assertSame(p, recorder.p);
2053	>
2054	>	recorder.reset();
2055	>	future = s.scheduleWithFixedDelay(r, randomTimeout(), LONG_DELAY_MS, MILLISECONDS);
2056	>	assertFalse(future.isDone());
2057	>	if (stock) assertTrue(!((FutureTask) recorder.r).isDone());
2058	>	assertSame(p, recorder.p);
2059	>	}
2060	>	}
2061	>
2062	>	// Checking our custom handler above should be sufficient, but
2063	>	// we add some integration tests of standard handlers.
2064	>	final AtomicReference<Thread> thread = new AtomicReference<>();
2065	>	final Runnable setThread = () -> thread.set(Thread.currentThread());
2066	>
2067	>	setRejectedExecutionHandler(p, new ThreadPoolExecutor.AbortPolicy());
2068	>	try {
2069	>	p.execute(setThread);
2070	>	shouldThrow();
2071	>	} catch (RejectedExecutionException success) {}
2072	>	assertNull(thread.get());
2073	>
2074	>	setRejectedExecutionHandler(p, new ThreadPoolExecutor.DiscardPolicy());
2075	>	p.execute(setThread);
2076	>	assertNull(thread.get());
2077	>
2078	>	setRejectedExecutionHandler(p, new ThreadPoolExecutor.CallerRunsPolicy());
2079	>	p.execute(setThread);
2080	>	if (p.isShutdown())
2081	>	assertNull(thread.get());
2082	>	else
2083	>	assertSame(Thread.currentThread(), thread.get());
2084	>
2085	>	setRejectedExecutionHandler(p, savedHandler);
2086	>
2087	>	// check that pool was not perturbed by handlers
2088	>	assertEquals(savedTaskCount, p.getTaskCount());
2089	>	assertEquals(savedCompletedTaskCount, p.getCompletedTaskCount());
2090	>	assertEquals(savedQueueSize, p.getQueue().size());
2091	>	}
2092	>
2093	>	void assertCollectionsEquals(Collection<?> x, Collection<?> y) {
2094	>	assertEquals(x, y);
2095	>	assertEquals(y, x);
2096	>	assertEquals(x.isEmpty(), y.isEmpty());
2097	>	assertEquals(x.size(), y.size());
2098	>	if (x instanceof List) {
2099	>	assertEquals(x.toString(), y.toString());
2100	>	}
2101	>	if (x instanceof List || x instanceof Set) {
2102	>	assertEquals(x.hashCode(), y.hashCode());
2103	>	}
2104	>	if (x instanceof List || x instanceof Deque) {
2105	>	assertTrue(Arrays.equals(x.toArray(), y.toArray()));
2106	>	assertTrue(Arrays.equals(x.toArray(new Object[0]),
2107	>	y.toArray(new Object[0])));
2108	>	}
2109	>	}
2110	>
2111	>	/**
2112	>	* A weaker form of assertCollectionsEquals which does not insist
2113	>	* that the two collections satisfy Object#equals(Object), since
2114	>	* they may use identity semantics as Deques do.
2115	>	*/
2116	>	void assertCollectionsEquivalent(Collection<?> x, Collection<?> y) {
2117	>	if (x instanceof List || x instanceof Set)
2118	>	assertCollectionsEquals(x, y);
2119	>	else {
2120	>	assertEquals(x.isEmpty(), y.isEmpty());
2121	>	assertEquals(x.size(), y.size());
2122	>	assertEquals(new HashSet(x), new HashSet(y));
2123	>	if (x instanceof Deque) {
2124	>	assertTrue(Arrays.equals(x.toArray(), y.toArray()));
2125	>	assertTrue(Arrays.equals(x.toArray(new Object[0]),
2126	>	y.toArray(new Object[0])));
2127		}
2128		}
2129		}
293	–
2130		}

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