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

Comparing jsr166/src/test/tck/JSR166TestCase.java (file contents):
Revision 1.3 by dl, Sat Sep 20 18:20:08 2003 UTC vs.
Revision 1.217 by jsr166, Tue Jan 24 22:57:02 2017 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 with assistance from members of JCP JSR-166
3	>	* Expert Group and released to the public domain, as explained at
4	>	* http://creativecommons.org/publicdomain/zero/1.0/
5	>	* Other contributors include Andrew Wright, Jeffrey Hayes,
6	>	* Pat Fisher, Mike Judd.
7		*/
8
9	<	import junit.framework.*;
10	<	import java.util.*;
11	<	import java.util.concurrent.*;
12	<	import java.io.*;
9	>	/*
10	>	* @test
11	>	* @summary JSR-166 tck tests (conformance testing mode)
12	>	* @build *
13	>	* @modules java.management
14	>	* @run junit/othervm/timeout=1000 JSR166TestCase
15	>	*/
16	>
17	>	/*
18	>	* @test
19	>	* @summary JSR-166 tck tests (whitebox tests allowed)
20	>	* @build *
21	>	* @modules java.base/java.util.concurrent:open
22	>	*          java.management
23	>	* @run junit/othervm/timeout=1000
24	>	*      -Djsr166.testImplementationDetails=true
25	>	*      JSR166TestCase
26	>	* @run junit/othervm/timeout=1000
27	>	*      -Djsr166.testImplementationDetails=true
28	>	*      -Djava.util.concurrent.ForkJoinPool.common.parallelism=0
29	>	*      JSR166TestCase
30	>	* @run junit/othervm/timeout=1000
31	>	*      -Djsr166.testImplementationDetails=true
32	>	*      -Djava.util.concurrent.ForkJoinPool.common.parallelism=1
33	>	*      -Djava.util.secureRandomSeed=true
34	>	*      JSR166TestCase
35	>	* @run junit/othervm/timeout=1000/policy=tck.policy
36	>	*      -Djsr166.testImplementationDetails=true
37	>	*      JSR166TestCase
38	>	*/
39
40	+	import static java.util.concurrent.TimeUnit.MILLISECONDS;
41	+	import static java.util.concurrent.TimeUnit.MINUTES;
42	+	import static java.util.concurrent.TimeUnit.NANOSECONDS;
43	+
44	+	import java.io.ByteArrayInputStream;
45	+	import java.io.ByteArrayOutputStream;
46	+	import java.io.ObjectInputStream;
47	+	import java.io.ObjectOutputStream;
48	+	import java.lang.management.ManagementFactory;
49	+	import java.lang.management.ThreadInfo;
50	+	import java.lang.management.ThreadMXBean;
51	+	import java.lang.reflect.Constructor;
52	+	import java.lang.reflect.Method;
53	+	import java.lang.reflect.Modifier;
54	+	import java.nio.file.Files;
55	+	import java.nio.file.Paths;
56	+	import java.security.CodeSource;
57	+	import java.security.Permission;
58	+	import java.security.PermissionCollection;
59	+	import java.security.Permissions;
60	+	import java.security.Policy;
61	+	import java.security.ProtectionDomain;
62	+	import java.security.SecurityPermission;
63	+	import java.util.ArrayList;
64	+	import java.util.Arrays;
65	+	import java.util.Collection;
66	+	import java.util.Collections;
67	+	import java.util.Date;
68	+	import java.util.Enumeration;
69	+	import java.util.Iterator;
70	+	import java.util.List;
71	+	import java.util.NoSuchElementException;
72	+	import java.util.PropertyPermission;
73	+	import java.util.concurrent.BlockingQueue;
74	+	import java.util.concurrent.Callable;
75	+	import java.util.concurrent.CountDownLatch;
76	+	import java.util.concurrent.CyclicBarrier;
77	+	import java.util.concurrent.ExecutionException;
78	+	import java.util.concurrent.Executors;
79	+	import java.util.concurrent.ExecutorService;
80	+	import java.util.concurrent.ForkJoinPool;
81	+	import java.util.concurrent.Future;
82	+	import java.util.concurrent.RecursiveAction;
83	+	import java.util.concurrent.RecursiveTask;
84	+	import java.util.concurrent.RejectedExecutionHandler;
85	+	import java.util.concurrent.Semaphore;
86	+	import java.util.concurrent.SynchronousQueue;
87	+	import java.util.concurrent.ThreadFactory;
88	+	import java.util.concurrent.ThreadLocalRandom;
89	+	import java.util.concurrent.ThreadPoolExecutor;
90	+	import java.util.concurrent.TimeoutException;
91	+	import java.util.concurrent.atomic.AtomicBoolean;
92	+	import java.util.concurrent.atomic.AtomicReference;
93	+	import java.util.regex.Matcher;
94	+	import java.util.regex.Pattern;
95	+
96	+	import junit.framework.AssertionFailedError;
97	+	import junit.framework.Test;
98	+	import junit.framework.TestCase;
99	+	import junit.framework.TestResult;
100	+	import junit.framework.TestSuite;
101
102		/**
103	<	* Base class for JSR166 Junit TCK tests.  Defines some constants and
104	<	* utility methods, as well as a simple framework for helping to make
105	<	* sure that assertions failing in generated threads cause the
106	<	* associated test that generated them to itself fail (which JUnit doe
107	<	* not otherwise arrange).  The rules for creating such tests are:
103	>	* Base class for JSR166 Junit TCK tests.  Defines some constants,
104	>	* utility methods and classes, as well as a simple framework for
105	>	* helping to make sure that assertions failing in generated threads
106	>	* cause the associated test that generated them to itself fail (which
107	>	* JUnit does not otherwise arrange).  The rules for creating such
108	>	* tests are:
109		*
110		* <ol>
111		*
112	<	* <li> All assertions in code running in generated threads must use
113	<	* the forms {@link threadFail} , {@link threadAssertTrue} {@link
114	<	* threadAssertEquals}, or {@link threadAssertNull}, (not
115	<	* <tt>fail</tt>, <tt>assertTrue</tt>, etc.) It is OK (but not
112	>	* <li>All assertions in code running in generated threads must use
113	>	* the forms {@link #threadFail}, {@link #threadAssertTrue}, {@link
114	>	* #threadAssertEquals}, or {@link #threadAssertNull}, (not
115	>	* {@code fail}, {@code assertTrue}, etc.) It is OK (but not
116		* particularly recommended) for other code to use these forms too.
117		* Only the most typically used JUnit assertion methods are defined
118	<	* this way, but enough to live with.</li>
118	>	* this way, but enough to live with.
119		*
120	<	* <li> If you override {@link setUp} or {@link tearDown}, make sure
121	<	* to invoke <tt>super.setUp</tt> and <tt>super.tearDown</tt> within
120	>	* <li>If you override {@link #setUp} or {@link #tearDown}, make sure
121	>	* to invoke {@code super.setUp} and {@code super.tearDown} within
122		* them. These methods are used to clear and check for thread
123	<	* assertion failures.</li>
123	>	* assertion failures.
124		*
125	<	* <li>All delays and timeouts must use one of the constants {@link
126	<	* SHORT_DELAY_MS}, {@link SMALL_DELAY_MS}, {@link MEDIUM_DELAY_MS},
127	<	* {@link LONG_DELAY_MS}. The idea here is that a SHORT is always
128	<	* discriminatable from zero time, and always allows enough time for
129	<	* the small amounts of computation (creating a thread, calling a few
125	>	* <li>All delays and timeouts must use one of the constants {@code
126	>	* SHORT_DELAY_MS}, {@code SMALL_DELAY_MS}, {@code MEDIUM_DELAY_MS},
127	>	* {@code LONG_DELAY_MS}. The idea here is that a SHORT is always
128	>	* discriminable from zero time, and always allows enough time for the
129	>	* small amounts of computation (creating a thread, calling a few
130		* methods, etc) needed to reach a timeout point. Similarly, a SMALL
131		* is always discriminable as larger than SHORT and smaller than
132		* MEDIUM.  And so on. These constants are set to conservative values,
133		* but even so, if there is ever any doubt, they can all be increased
134	<	* in one spot to rerun tests on slower platforms</li>
134	>	* in one spot to rerun tests on slower platforms.
135		*
136	<	* <li> All threads generated must be joined inside each test case
137	<	* method (or <tt>fail</tt> to do so) before returning from the
138	<	* method. The {@link joinPool} method can be used to do this when
139	<	* using Executors.</li>
136	>	* <li>All threads generated must be joined inside each test case
137	>	* method (or {@code fail} to do so) before returning from the
138	>	* method. The {@code joinPool} method can be used to do this when
139	>	* using Executors.
140		*
141		* </ol>
142	+	*
143	+	* <p><b>Other notes</b>
144	+	* <ul>
145	+	*
146	+	* <li>Usually, there is one testcase method per JSR166 method
147	+	* covering "normal" operation, and then as many exception-testing
148	+	* methods as there are exceptions the method can throw. Sometimes
149	+	* there are multiple tests per JSR166 method when the different
150	+	* "normal" behaviors differ significantly. And sometimes testcases
151	+	* cover multiple methods when they cannot be tested in isolation.
152	+	*
153	+	* <li>The documentation style for testcases is to provide as javadoc
154	+	* a simple sentence or two describing the property that the testcase
155	+	* method purports to test. The javadocs do not say anything about how
156	+	* the property is tested. To find out, read the code.
157	+	*
158	+	* <li>These tests are "conformance tests", and do not attempt to
159	+	* test throughput, latency, scalability or other performance factors
160	+	* (see the separate "jtreg" tests for a set intended to check these
161	+	* for the most central aspects of functionality.) So, most tests use
162	+	* the smallest sensible numbers of threads, collection sizes, etc
163	+	* needed to check basic conformance.
164	+	*
165	+	* <li>The test classes currently do not declare inclusion in
166	+	* any particular package to simplify things for people integrating
167	+	* them in TCK test suites.
168	+	*
169	+	* <li>As a convenience, the {@code main} of this class (JSR166TestCase)
170	+	* runs all JSR166 unit tests.
171	+	*
172	+	* </ul>
173		*/
174		public class JSR166TestCase extends TestCase {
175	+	private static final boolean useSecurityManager =
176	+	Boolean.getBoolean("jsr166.useSecurityManager");
177	+
178	+	protected static final boolean expensiveTests =
179	+	Boolean.getBoolean("jsr166.expensiveTests");
180	+
181	+	/**
182	+	* If true, also run tests that are not part of the official tck
183	+	* because they test unspecified implementation details.
184	+	*/
185	+	protected static final boolean testImplementationDetails =
186	+	Boolean.getBoolean("jsr166.testImplementationDetails");
187	+
188	+	/**
189	+	* If true, report on stdout all "slow" tests, that is, ones that
190	+	* take more than profileThreshold milliseconds to execute.
191	+	*/
192	+	private static final boolean profileTests =
193	+	Boolean.getBoolean("jsr166.profileTests");
194	+
195	+	/**
196	+	* The number of milliseconds that tests are permitted for
197	+	* execution without being reported, when profileTests is set.
198	+	*/
199	+	private static final long profileThreshold =
200	+	Long.getLong("jsr166.profileThreshold", 100);
201	+
202	+	/**
203	+	* The number of repetitions per test (for tickling rare bugs).
204	+	*/
205	+	private static final int runsPerTest =
206	+	Integer.getInteger("jsr166.runsPerTest", 1);
207	+
208	+	/**
209	+	* The number of repetitions of the test suite (for finding leaks?).
210	+	*/
211	+	private static final int suiteRuns =
212	+	Integer.getInteger("jsr166.suiteRuns", 1);
213	+
214	+	/**
215	+	* Returns the value of the system property, or NaN if not defined.
216	+	*/
217	+	private static float systemPropertyValue(String name) {
218	+	String floatString = System.getProperty(name);
219	+	if (floatString == null)
220	+	return Float.NaN;
221	+	try {
222	+	return Float.parseFloat(floatString);
223	+	} catch (NumberFormatException ex) {
224	+	throw new IllegalArgumentException(
225	+	String.format("Bad float value in system property %s=%s",
226	+	name, floatString));
227	+	}
228	+	}
229	+
230	+	/**
231	+	* The scaling factor to apply to standard delays used in tests.
232	+	* May be initialized from any of:
233	+	* - the "jsr166.delay.factor" system property
234	+	* - the "test.timeout.factor" system property (as used by jtreg)
235	+	*   See: http://openjdk.java.net/jtreg/tag-spec.html
236	+	* - hard-coded fuzz factor when using a known slowpoke VM
237	+	*/
238	+	private static final float delayFactor = delayFactor();
239	+
240	+	private static float delayFactor() {
241	+	float x;
242	+	if (!Float.isNaN(x = systemPropertyValue("jsr166.delay.factor")))
243	+	return x;
244	+	if (!Float.isNaN(x = systemPropertyValue("test.timeout.factor")))
245	+	return x;
246	+	String prop = System.getProperty("java.vm.version");
247	+	if (prop != null && prop.matches(".*debug.*"))
248	+	return 4.0f; // How much slower is fastdebug than product?!
249	+	return 1.0f;
250	+	}
251	+
252	+	public JSR166TestCase() { super(); }
253	+	public JSR166TestCase(String name) { super(name); }
254	+
255	+	/**
256	+	* A filter for tests to run, matching strings of the form
257	+	* methodName(className), e.g. "testInvokeAll5(ForkJoinPoolTest)"
258	+	* Usefully combined with jsr166.runsPerTest.
259	+	*/
260	+	private static final Pattern methodFilter = methodFilter();
261	+
262	+	private static Pattern methodFilter() {
263	+	String regex = System.getProperty("jsr166.methodFilter");
264	+	return (regex == null) ? null : Pattern.compile(regex);
265	+	}
266	+
267	+	// Instrumentation to debug very rare, but very annoying hung test runs.
268	+	static volatile TestCase currentTestCase;
269	+	// static volatile int currentRun = 0;
270	+	static {
271	+	Runnable checkForWedgedTest = new Runnable() { public void run() {
272	+	// Avoid spurious reports with enormous runsPerTest.
273	+	// A single test case run should never take more than 1 second.
274	+	// But let's cap it at the high end too ...
275	+	final int timeoutMinutes =
276	+	Math.min(15, Math.max(runsPerTest / 60, 1));
277	+	for (TestCase lastTestCase = currentTestCase;;) {
278	+	try { MINUTES.sleep(timeoutMinutes); }
279	+	catch (InterruptedException unexpected) { break; }
280	+	if (lastTestCase == currentTestCase) {
281	+	System.err.printf(
282	+	"Looks like we're stuck running test: %s%n",
283	+	lastTestCase);
284	+	//                     System.err.printf(
285	+	//                         "Looks like we're stuck running test: %s (%d/%d)%n",
286	+	//                         lastTestCase, currentRun, runsPerTest);
287	+	//                     System.err.println("availableProcessors=" +
288	+	//                         Runtime.getRuntime().availableProcessors());
289	+	//                     System.err.printf("cpu model = %s%n", cpuModel());
290	+	dumpTestThreads();
291	+	// one stack dump is probably enough; more would be spam
292	+	break;
293	+	}
294	+	lastTestCase = currentTestCase;
295	+	}}};
296	+	Thread thread = new Thread(checkForWedgedTest, "checkForWedgedTest");
297	+	thread.setDaemon(true);
298	+	thread.start();
299	+	}
300	+
301	+	//     public static String cpuModel() {
302	+	//         try {
303	+	//             Matcher matcher = Pattern.compile("model name\\s*: (.*)")
304	+	//                 .matcher(new String(
305	+	//                      Files.readAllBytes(Paths.get("/proc/cpuinfo")), "UTF-8"));
306	+	//             matcher.find();
307	+	//             return matcher.group(1);
308	+	//         } catch (Exception ex) { return null; }
309	+	//     }
310	+
311	+	public void runBare() throws Throwable {
312	+	currentTestCase = this;
313	+	if (methodFilter == null
314	+	|| methodFilter.matcher(toString()).find())
315	+	super.runBare();
316	+	}
317	+
318	+	protected void runTest() throws Throwable {
319	+	for (int i = 0; i < runsPerTest; i++) {
320	+	// currentRun = i;
321	+	if (profileTests)
322	+	runTestProfiled();
323	+	else
324	+	super.runTest();
325	+	}
326	+	}
327	+
328	+	protected void runTestProfiled() throws Throwable {
329	+	for (int i = 0; i < 2; i++) {
330	+	long startTime = System.nanoTime();
331	+	super.runTest();
332	+	long elapsedMillis = millisElapsedSince(startTime);
333	+	if (elapsedMillis < profileThreshold)
334	+	break;
335	+	// Never report first run of any test; treat it as a
336	+	// warmup run, notably to trigger all needed classloading,
337	+	if (i > 0)
338	+	System.out.printf("%n%s: %d%n", toString(), elapsedMillis);
339	+	}
340	+	}
341	+
342	+	/**
343	+	* Runs all JSR166 unit tests using junit.textui.TestRunner.
344	+	*/
345	+	public static void main(String[] args) {
346	+	main(suite(), args);
347	+	}
348	+
349	+	static class PithyResultPrinter extends junit.textui.ResultPrinter {
350	+	PithyResultPrinter(java.io.PrintStream writer) { super(writer); }
351	+	long runTime;
352	+	public void startTest(Test test) {}
353	+	protected void printHeader(long runTime) {
354	+	this.runTime = runTime; // defer printing for later
355	+	}
356	+	protected void printFooter(TestResult result) {
357	+	if (result.wasSuccessful()) {
358	+	getWriter().println("OK (" + result.runCount() + " tests)"
359	+	+ "  Time: " + elapsedTimeAsString(runTime));
360	+	} else {
361	+	getWriter().println("Time: " + elapsedTimeAsString(runTime));
362	+	super.printFooter(result);
363	+	}
364	+	}
365	+	}
366	+
367	+	/**
368	+	* Returns a TestRunner that doesn't bother with unnecessary
369	+	* fluff, like printing a "." for each test case.
370	+	*/
371	+	static junit.textui.TestRunner newPithyTestRunner() {
372	+	junit.textui.TestRunner runner = new junit.textui.TestRunner();
373	+	runner.setPrinter(new PithyResultPrinter(System.out));
374	+	return runner;
375	+	}
376	+
377	+	/**
378	+	* Runs all unit tests in the given test suite.
379	+	* Actual behavior influenced by jsr166.* system properties.
380	+	*/
381	+	static void main(Test suite, String[] args) {
382	+	if (useSecurityManager) {
383	+	System.err.println("Setting a permissive security manager");
384	+	Policy.setPolicy(permissivePolicy());
385	+	System.setSecurityManager(new SecurityManager());
386	+	}
387	+	for (int i = 0; i < suiteRuns; i++) {
388	+	TestResult result = newPithyTestRunner().doRun(suite);
389	+	if (!result.wasSuccessful())
390	+	System.exit(1);
391	+	System.gc();
392	+	System.runFinalization();
393	+	}
394	+	}
395	+
396	+	public static TestSuite newTestSuite(Object... suiteOrClasses) {
397	+	TestSuite suite = new TestSuite();
398	+	for (Object suiteOrClass : suiteOrClasses) {
399	+	if (suiteOrClass instanceof TestSuite)
400	+	suite.addTest((TestSuite) suiteOrClass);
401	+	else if (suiteOrClass instanceof Class)
402	+	suite.addTest(new TestSuite((Class<?>) suiteOrClass));
403	+	else
404	+	throw new ClassCastException("not a test suite or class");
405	+	}
406	+	return suite;
407	+	}
408	+
409	+	public static void addNamedTestClasses(TestSuite suite,
410	+	String... testClassNames) {
411	+	for (String testClassName : testClassNames) {
412	+	try {
413	+	Class<?> testClass = Class.forName(testClassName);
414	+	Method m = testClass.getDeclaredMethod("suite",
415	+	new Class<?>[0]);
416	+	suite.addTest(newTestSuite((Test)m.invoke(null)));
417	+	} catch (Exception e) {
418	+	throw new Error("Missing test class", e);
419	+	}
420	+	}
421	+	}
422	+
423	+	public static final double JAVA_CLASS_VERSION;
424	+	public static final String JAVA_SPECIFICATION_VERSION;
425	+	static {
426	+	try {
427	+	JAVA_CLASS_VERSION = java.security.AccessController.doPrivileged(
428	+	new java.security.PrivilegedAction<Double>() {
429	+	public Double run() {
430	+	return Double.valueOf(System.getProperty("java.class.version"));}});
431	+	JAVA_SPECIFICATION_VERSION = java.security.AccessController.doPrivileged(
432	+	new java.security.PrivilegedAction<String>() {
433	+	public String run() {
434	+	return System.getProperty("java.specification.version");}});
435	+	} catch (Throwable t) {
436	+	throw new Error(t);
437	+	}
438	+	}
439	+
440	+	public static boolean atLeastJava6() { return JAVA_CLASS_VERSION >= 50.0; }
441	+	public static boolean atLeastJava7() { return JAVA_CLASS_VERSION >= 51.0; }
442	+	public static boolean atLeastJava8() { return JAVA_CLASS_VERSION >= 52.0; }
443	+	public static boolean atLeastJava9() {
444	+	return JAVA_CLASS_VERSION >= 53.0
445	+	// As of 2015-09, java9 still uses 52.0 class file version
446	+	|| JAVA_SPECIFICATION_VERSION.matches("^(1\\.)?(9|[0-9][0-9])$");
447	+	}
448	+	public static boolean atLeastJava10() {
449	+	return JAVA_CLASS_VERSION >= 54.0
450	+	|| JAVA_SPECIFICATION_VERSION.matches("^(1\\.)?[0-9][0-9]$");
451	+	}
452	+
453	+	/**
454	+	* Collects all JSR166 unit tests as one suite.
455	+	*/
456	+	public static Test suite() {
457	+	// Java7+ test classes
458	+	TestSuite suite = newTestSuite(
459	+	ForkJoinPoolTest.suite(),
460	+	ForkJoinTaskTest.suite(),
461	+	RecursiveActionTest.suite(),
462	+	RecursiveTaskTest.suite(),
463	+	LinkedTransferQueueTest.suite(),
464	+	PhaserTest.suite(),
465	+	ThreadLocalRandomTest.suite(),
466	+	AbstractExecutorServiceTest.suite(),
467	+	AbstractQueueTest.suite(),
468	+	AbstractQueuedSynchronizerTest.suite(),
469	+	AbstractQueuedLongSynchronizerTest.suite(),
470	+	ArrayBlockingQueueTest.suite(),
471	+	ArrayDequeTest.suite(),
472	+	ArrayListTest.suite(),
473	+	AtomicBooleanTest.suite(),
474	+	AtomicIntegerArrayTest.suite(),
475	+	AtomicIntegerFieldUpdaterTest.suite(),
476	+	AtomicIntegerTest.suite(),
477	+	AtomicLongArrayTest.suite(),
478	+	AtomicLongFieldUpdaterTest.suite(),
479	+	AtomicLongTest.suite(),
480	+	AtomicMarkableReferenceTest.suite(),
481	+	AtomicReferenceArrayTest.suite(),
482	+	AtomicReferenceFieldUpdaterTest.suite(),
483	+	AtomicReferenceTest.suite(),
484	+	AtomicStampedReferenceTest.suite(),
485	+	ConcurrentHashMapTest.suite(),
486	+	ConcurrentLinkedDequeTest.suite(),
487	+	ConcurrentLinkedQueueTest.suite(),
488	+	ConcurrentSkipListMapTest.suite(),
489	+	ConcurrentSkipListSubMapTest.suite(),
490	+	ConcurrentSkipListSetTest.suite(),
491	+	ConcurrentSkipListSubSetTest.suite(),
492	+	CopyOnWriteArrayListTest.suite(),
493	+	CopyOnWriteArraySetTest.suite(),
494	+	CountDownLatchTest.suite(),
495	+	CountedCompleterTest.suite(),
496	+	CyclicBarrierTest.suite(),
497	+	DelayQueueTest.suite(),
498	+	EntryTest.suite(),
499	+	ExchangerTest.suite(),
500	+	ExecutorsTest.suite(),
501	+	ExecutorCompletionServiceTest.suite(),
502	+	FutureTaskTest.suite(),
503	+	LinkedBlockingDequeTest.suite(),
504	+	LinkedBlockingQueueTest.suite(),
505	+	LinkedListTest.suite(),
506	+	LockSupportTest.suite(),
507	+	PriorityBlockingQueueTest.suite(),
508	+	PriorityQueueTest.suite(),
509	+	ReentrantLockTest.suite(),
510	+	ReentrantReadWriteLockTest.suite(),
511	+	ScheduledExecutorTest.suite(),
512	+	ScheduledExecutorSubclassTest.suite(),
513	+	SemaphoreTest.suite(),
514	+	SynchronousQueueTest.suite(),
515	+	SystemTest.suite(),
516	+	ThreadLocalTest.suite(),
517	+	ThreadPoolExecutorTest.suite(),
518	+	ThreadPoolExecutorSubclassTest.suite(),
519	+	ThreadTest.suite(),
520	+	TimeUnitTest.suite(),
521	+	TreeMapTest.suite(),
522	+	TreeSetTest.suite(),
523	+	TreeSubMapTest.suite(),
524	+	TreeSubSetTest.suite(),
525	+	VectorTest.suite());
526	+
527	+	// Java8+ test classes
528	+	if (atLeastJava8()) {
529	+	String[] java8TestClassNames = {
530	+	"ArrayDeque8Test",
531	+	"Atomic8Test",
532	+	"CompletableFutureTest",
533	+	"ConcurrentHashMap8Test",
534	+	"CountedCompleter8Test",
535	+	"DoubleAccumulatorTest",
536	+	"DoubleAdderTest",
537	+	"ForkJoinPool8Test",
538	+	"ForkJoinTask8Test",
539	+	"LinkedBlockingDeque8Test",
540	+	"LinkedBlockingQueue8Test",
541	+	"LongAccumulatorTest",
542	+	"LongAdderTest",
543	+	"SplittableRandomTest",
544	+	"StampedLockTest",
545	+	"SubmissionPublisherTest",
546	+	"ThreadLocalRandom8Test",
547	+	"TimeUnit8Test",
548	+	};
549	+	addNamedTestClasses(suite, java8TestClassNames);
550	+	}
551	+
552	+	// Java9+ test classes
553	+	if (atLeastJava9()) {
554	+	String[] java9TestClassNames = {
555	+	"AtomicBoolean9Test",
556	+	"AtomicInteger9Test",
557	+	"AtomicIntegerArray9Test",
558	+	"AtomicLong9Test",
559	+	"AtomicLongArray9Test",
560	+	"AtomicReference9Test",
561	+	"AtomicReferenceArray9Test",
562	+	"ExecutorCompletionService9Test",
563	+	};
564	+	addNamedTestClasses(suite, java9TestClassNames);
565	+	}
566	+
567	+	return suite;
568	+	}
569	+
570	+	/** Returns list of junit-style test method names in given class. */
571	+	public static ArrayList<String> testMethodNames(Class<?> testClass) {
572	+	Method[] methods = testClass.getDeclaredMethods();
573	+	ArrayList<String> names = new ArrayList<>(methods.length);
574	+	for (Method method : methods) {
575	+	if (method.getName().startsWith("test")
576	+	&& Modifier.isPublic(method.getModifiers())
577	+	// method.getParameterCount() requires jdk8+
578	+	&& method.getParameterTypes().length == 0) {
579	+	names.add(method.getName());
580	+	}
581	+	}
582	+	return names;
583	+	}
584	+
585	+	/**
586	+	* Returns junit-style testSuite for the given test class, but
587	+	* parameterized by passing extra data to each test.
588	+	*/
589	+	public static <ExtraData> Test parameterizedTestSuite
590	+	(Class<? extends JSR166TestCase> testClass,
591	+	Class<ExtraData> dataClass,
592	+	ExtraData data) {
593	+	try {
594	+	TestSuite suite = new TestSuite();
595	+	Constructor c =
596	+	testClass.getDeclaredConstructor(dataClass, String.class);
597	+	for (String methodName : testMethodNames(testClass))
598	+	suite.addTest((Test) c.newInstance(data, methodName));
599	+	return suite;
600	+	} catch (Exception e) {
601	+	throw new Error(e);
602	+	}
603	+	}
604	+
605	+	/**
606	+	* Returns junit-style testSuite for the jdk8 extension of the
607	+	* given test class, but parameterized by passing extra data to
608	+	* each test.  Uses reflection to allow compilation in jdk7.
609	+	*/
610	+	public static <ExtraData> Test jdk8ParameterizedTestSuite
611	+	(Class<? extends JSR166TestCase> testClass,
612	+	Class<ExtraData> dataClass,
613	+	ExtraData data) {
614	+	if (atLeastJava8()) {
615	+	String name = testClass.getName();
616	+	String name8 = name.replaceAll("Test$", "8Test");
617	+	if (name.equals(name8)) throw new Error(name);
618	+	try {
619	+	return (Test)
620	+	Class.forName(name8)
621	+	.getMethod("testSuite", new Class[] { dataClass })
622	+	.invoke(null, data);
623	+	} catch (Exception e) {
624	+	throw new Error(e);
625	+	}
626	+	} else {
627	+	return new TestSuite();
628	+	}
629	+	}
630	+
631	+	// Delays for timing-dependent tests, in milliseconds.
632
633		public static long SHORT_DELAY_MS;
634		public static long SMALL_DELAY_MS;
635		public static long MEDIUM_DELAY_MS;
636		public static long LONG_DELAY_MS;
637
61	–
638		/**
639	<	* Return the shortest timed delay. This could
640	<	* be reimplmented to use for example a Property.
641	<	*/
639	>	* Returns the shortest timed delay. This can be scaled up for
640	>	* slow machines using the jsr166.delay.factor system property,
641	>	* or via jtreg's -timeoutFactor: flag.
642	>	* http://openjdk.java.net/jtreg/command-help.html
643	>	*/
644		protected long getShortDelay() {
645	<	return 50;
645	>	return (long) (50 * delayFactor);
646		}
647
70	–
648		/**
649	<	* Set delays as multiples fo SHORT_DELAY.
649	>	* Sets delays as multiples of SHORT_DELAY.
650		*/
651	<	protected  void setDelays() {
651	>	protected void setDelays() {
652		SHORT_DELAY_MS = getShortDelay();
653	<	SMALL_DELAY_MS = SHORT_DELAY_MS * 5;
653	>	SMALL_DELAY_MS  = SHORT_DELAY_MS * 5;
654		MEDIUM_DELAY_MS = SHORT_DELAY_MS * 10;
655	<	LONG_DELAY_MS = SHORT_DELAY_MS * 50;
655	>	LONG_DELAY_MS   = SHORT_DELAY_MS * 200;
656	>	}
657	>
658	>	/**
659	>	* Returns a timeout in milliseconds to be used in tests that
660	>	* verify that operations block or time out.
661	>	*/
662	>	long timeoutMillis() {
663	>	return SHORT_DELAY_MS / 4;
664		}
665
666		/**
667	<	* Flag set true if any threadAssert methods fail
667	>	* Returns a new Date instance representing a time at least
668	>	* delayMillis milliseconds in the future.
669		*/
670	<	protected volatile boolean threadFailed;
670	>	Date delayedDate(long delayMillis) {
671	>	// Add 1 because currentTimeMillis is known to round into the past.
672	>	return new Date(System.currentTimeMillis() + delayMillis + 1);
673	>	}
674
675		/**
676	<	* Initialize test to indicat that no thread assertions have failed
676	>	* The first exception encountered if any threadAssertXXX method fails.
677		*/
678	<	public void setUp() {
678	>	private final AtomicReference<Throwable> threadFailure
679	>	= new AtomicReference<>(null);
680	>
681	>	/**
682	>	* Records an exception so that it can be rethrown later in the test
683	>	* harness thread, triggering a test case failure.  Only the first
684	>	* failure is recorded; subsequent calls to this method from within
685	>	* the same test have no effect.
686	>	*/
687	>	public void threadRecordFailure(Throwable t) {
688	>	System.err.println(t);
689	>	dumpTestThreads();
690	>	threadFailure.compareAndSet(null, t);
691	>	}
692	>
693	>	public void setUp() {
694		setDelays();
695	<	threadFailed = false;
695	>	}
696	>
697	>	void tearDownFail(String format, Object... args) {
698	>	String msg = toString() + ": " + String.format(format, args);
699	>	System.err.println(msg);
700	>	dumpTestThreads();
701	>	throw new AssertionFailedError(msg);
702	>	}
703	>
704	>	/**
705	>	* Extra checks that get done for all test cases.
706	>	*
707	>	* Triggers test case failure if any thread assertions have failed,
708	>	* by rethrowing, in the test harness thread, any exception recorded
709	>	* earlier by threadRecordFailure.
710	>	*
711	>	* Triggers test case failure if interrupt status is set in the main thread.
712	>	*/
713	>	public void tearDown() throws Exception {
714	>	Throwable t = threadFailure.getAndSet(null);
715	>	if (t != null) {
716	>	if (t instanceof Error)
717	>	throw (Error) t;
718	>	else if (t instanceof RuntimeException)
719	>	throw (RuntimeException) t;
720	>	else if (t instanceof Exception)
721	>	throw (Exception) t;
722	>	else {
723	>	AssertionFailedError afe =
724	>	new AssertionFailedError(t.toString());
725	>	afe.initCause(t);
726	>	throw afe;
727	>	}
728	>	}
729	>
730	>	if (Thread.interrupted())
731	>	tearDownFail("interrupt status set in main thread");
732	>
733	>	checkForkJoinPoolThreadLeaks();
734		}
735
736		/**
737	<	* Trigger test case failure if any thread assertions have failed
737	>	* Finds missing PoolCleaners
738		*/
739	<	public void tearDown() {
740	<	assertFalse(threadFailed);
739	>	void checkForkJoinPoolThreadLeaks() throws InterruptedException {
740	>	Thread[] survivors = new Thread[7];
741	>	int count = Thread.enumerate(survivors);
742	>	for (int i = 0; i < count; i++) {
743	>	Thread thread = survivors[i];
744	>	String name = thread.getName();
745	>	if (name.startsWith("ForkJoinPool-")) {
746	>	// give thread some time to terminate
747	>	thread.join(LONG_DELAY_MS);
748	>	if (thread.isAlive())
749	>	tearDownFail("Found leaked ForkJoinPool thread thread=%s",
750	>	thread);
751	>	}
752	>	}
753	>
754	>	if (!ForkJoinPool.commonPool()
755	>	.awaitQuiescence(LONG_DELAY_MS, MILLISECONDS))
756	>	tearDownFail("ForkJoin common pool thread stuck");
757		}
758
759	+	/**
760	+	* Just like fail(reason), but additionally recording (using
761	+	* threadRecordFailure) any AssertionFailedError thrown, so that
762	+	* the current testcase will fail.
763	+	*/
764		public void threadFail(String reason) {
765	<	threadFailed = true;
766	<	fail(reason);
765	>	try {
766	>	fail(reason);
767	>	} catch (AssertionFailedError t) {
768	>	threadRecordFailure(t);
769	>	throw t;
770	>	}
771		}
772
773	+	/**
774	+	* Just like assertTrue(b), but additionally recording (using
775	+	* threadRecordFailure) any AssertionFailedError thrown, so that
776	+	* the current testcase will fail.
777	+	*/
778		public void threadAssertTrue(boolean b) {
779	<	if (!b) {
108	<	threadFailed = true;
779	>	try {
780		assertTrue(b);
781	+	} catch (AssertionFailedError t) {
782	+	threadRecordFailure(t);
783	+	throw t;
784		}
785		}
786	+
787	+	/**
788	+	* Just like assertFalse(b), but additionally recording (using
789	+	* threadRecordFailure) any AssertionFailedError thrown, so that
790	+	* the current testcase will fail.
791	+	*/
792		public void threadAssertFalse(boolean b) {
793	<	if (b) {
114	<	threadFailed = true;
793	>	try {
794		assertFalse(b);
795	+	} catch (AssertionFailedError t) {
796	+	threadRecordFailure(t);
797	+	throw t;
798		}
799		}
800	+
801	+	/**
802	+	* Just like assertNull(x), but additionally recording (using
803	+	* threadRecordFailure) any AssertionFailedError thrown, so that
804	+	* the current testcase will fail.
805	+	*/
806		public void threadAssertNull(Object x) {
807	<	if (x != null) {
120	<	threadFailed = true;
807	>	try {
808		assertNull(x);
809	+	} catch (AssertionFailedError t) {
810	+	threadRecordFailure(t);
811	+	throw t;
812		}
813		}
814	+
815	+	/**
816	+	* Just like assertEquals(x, y), but additionally recording (using
817	+	* threadRecordFailure) any AssertionFailedError thrown, so that
818	+	* the current testcase will fail.
819	+	*/
820		public void threadAssertEquals(long x, long y) {
821	<	if (x != y) {
126	<	threadFailed = true;
821	>	try {
822		assertEquals(x, y);
823	+	} catch (AssertionFailedError t) {
824	+	threadRecordFailure(t);
825	+	throw t;
826		}
827		}
828	+
829	+	/**
830	+	* Just like assertEquals(x, y), but additionally recording (using
831	+	* threadRecordFailure) any AssertionFailedError thrown, so that
832	+	* the current testcase will fail.
833	+	*/
834		public void threadAssertEquals(Object x, Object y) {
835	<	if (x != y && (x == null || !x.equals(y))) {
132	<	threadFailed = true;
835	>	try {
836		assertEquals(x, y);
837	+	} catch (AssertionFailedError fail) {
838	+	threadRecordFailure(fail);
839	+	throw fail;
840	+	} catch (Throwable fail) {
841	+	threadUnexpectedException(fail);
842		}
843		}
844
845	+	/**
846	+	* Just like assertSame(x, y), but additionally recording (using
847	+	* threadRecordFailure) any AssertionFailedError thrown, so that
848	+	* the current testcase will fail.
849	+	*/
850	+	public void threadAssertSame(Object x, Object y) {
851	+	try {
852	+	assertSame(x, y);
853	+	} catch (AssertionFailedError fail) {
854	+	threadRecordFailure(fail);
855	+	throw fail;
856	+	}
857	+	}
858	+
859	+	/**
860	+	* Calls threadFail with message "should throw exception".
861	+	*/
862		public void threadShouldThrow() {
863	<	threadFailed = true;
139	<	fail("should throw exception");
863	>	threadFail("should throw exception");
864		}
865
866	<	public void threadUnexpectedException() {
867	<	threadFailed = true;
868	<	fail("Unexpected exception");
866	>	/**
867	>	* Calls threadFail with message "should throw" + exceptionName.
868	>	*/
869	>	public void threadShouldThrow(String exceptionName) {
870	>	threadFail("should throw " + exceptionName);
871		}
872
873	+	/**
874	+	* Records the given exception using {@link #threadRecordFailure},
875	+	* then rethrows the exception, wrapping it in an
876	+	* AssertionFailedError if necessary.
877	+	*/
878	+	public void threadUnexpectedException(Throwable t) {
879	+	threadRecordFailure(t);
880	+	t.printStackTrace();
881	+	if (t instanceof RuntimeException)
882	+	throw (RuntimeException) t;
883	+	else if (t instanceof Error)
884	+	throw (Error) t;
885	+	else {
886	+	AssertionFailedError afe =
887	+	new AssertionFailedError("unexpected exception: " + t);
888	+	afe.initCause(t);
889	+	throw afe;
890	+	}
891	+	}
892
893		/**
894	<	* Wait out termination of a thread pool or fail doing so
894	>	* Delays, via Thread.sleep, for the given millisecond delay, but
895	>	* if the sleep is shorter than specified, may re-sleep or yield
896	>	* until time elapses.  Ensures that the given time, as measured
897	>	* by System.nanoTime(), has elapsed.
898		*/
899	<	public void joinPool(ExecutorService exec) {
899	>	static void delay(long millis) throws InterruptedException {
900	>	long nanos = millis * (1000 * 1000);
901	>	final long wakeupTime = System.nanoTime() + nanos;
902	>	do {
903	>	if (millis > 0L)
904	>	Thread.sleep(millis);
905	>	else // too short to sleep
906	>	Thread.yield();
907	>	nanos = wakeupTime - System.nanoTime();
908	>	millis = nanos / (1000 * 1000);
909	>	} while (nanos >= 0L);
910	>	}
911	>
912	>	/**
913	>	* Allows use of try-with-resources with per-test thread pools.
914	>	*/
915	>	class PoolCleaner implements AutoCloseable {
916	>	private final ExecutorService pool;
917	>	public PoolCleaner(ExecutorService pool) { this.pool = pool; }
918	>	public void close() { joinPool(pool); }
919	>	}
920	>
921	>	/**
922	>	* An extension of PoolCleaner that has an action to release the pool.
923	>	*/
924	>	class PoolCleanerWithReleaser extends PoolCleaner {
925	>	private final Runnable releaser;
926	>	public PoolCleanerWithReleaser(ExecutorService pool, Runnable releaser) {
927	>	super(pool);
928	>	this.releaser = releaser;
929	>	}
930	>	public void close() {
931	>	try {
932	>	releaser.run();
933	>	} finally {
934	>	super.close();
935	>	}
936	>	}
937	>	}
938	>
939	>	PoolCleaner cleaner(ExecutorService pool) {
940	>	return new PoolCleaner(pool);
941	>	}
942	>
943	>	PoolCleaner cleaner(ExecutorService pool, Runnable releaser) {
944	>	return new PoolCleanerWithReleaser(pool, releaser);
945	>	}
946	>
947	>	PoolCleaner cleaner(ExecutorService pool, CountDownLatch latch) {
948	>	return new PoolCleanerWithReleaser(pool, releaser(latch));
949	>	}
950	>
951	>	Runnable releaser(final CountDownLatch latch) {
952	>	return new Runnable() { public void run() {
953	>	do { latch.countDown(); }
954	>	while (latch.getCount() > 0);
955	>	}};
956	>	}
957	>
958	>	PoolCleaner cleaner(ExecutorService pool, AtomicBoolean flag) {
959	>	return new PoolCleanerWithReleaser(pool, releaser(flag));
960	>	}
961	>
962	>	Runnable releaser(final AtomicBoolean flag) {
963	>	return new Runnable() { public void run() { flag.set(true); }};
964	>	}
965	>
966	>	/**
967	>	* Waits out termination of a thread pool or fails doing so.
968	>	*/
969	>	void joinPool(ExecutorService pool) {
970	>	try {
971	>	pool.shutdown();
972	>	if (!pool.awaitTermination(2 * LONG_DELAY_MS, MILLISECONDS)) {
973	>	try {
974	>	threadFail("ExecutorService " + pool +
975	>	" did not terminate in a timely manner");
976	>	} finally {
977	>	// last resort, for the benefit of subsequent tests
978	>	pool.shutdownNow();
979	>	pool.awaitTermination(MEDIUM_DELAY_MS, MILLISECONDS);
980	>	}
981	>	}
982	>	} catch (SecurityException ok) {
983	>	// Allowed in case test doesn't have privs
984	>	} catch (InterruptedException fail) {
985	>	threadFail("Unexpected InterruptedException");
986	>	}
987	>	}
988	>
989	>	/**
990	>	* Like Runnable, but with the freedom to throw anything.
991	>	* junit folks had the same idea:
992	>	* http://junit.org/junit5/docs/snapshot/api/org/junit/gen5/api/Executable.html
993	>	*/
994	>	interface Action { public void run() throws Throwable; }
995	>
996	>	/**
997	>	* Runs all the given actions in parallel, failing if any fail.
998	>	* Useful for running multiple variants of tests that are
999	>	* necessarily individually slow because they must block.
1000	>	*/
1001	>	void testInParallel(Action ... actions) {
1002	>	ExecutorService pool = Executors.newCachedThreadPool();
1003	>	try (PoolCleaner cleaner = cleaner(pool)) {
1004	>	ArrayList<Future<?>> futures = new ArrayList<>(actions.length);
1005	>	for (final Action action : actions)
1006	>	futures.add(pool.submit(new CheckedRunnable() {
1007	>	public void realRun() throws Throwable { action.run();}}));
1008	>	for (Future<?> future : futures)
1009	>	try {
1010	>	assertNull(future.get(LONG_DELAY_MS, MILLISECONDS));
1011	>	} catch (ExecutionException ex) {
1012	>	threadUnexpectedException(ex.getCause());
1013	>	} catch (Exception ex) {
1014	>	threadUnexpectedException(ex);
1015	>	}
1016	>	}
1017	>	}
1018	>
1019	>	/**
1020	>	* A debugging tool to print stack traces of most threads, as jstack does.
1021	>	* Uninteresting threads are filtered out.
1022	>	*/
1023	>	static void dumpTestThreads() {
1024	>	SecurityManager sm = System.getSecurityManager();
1025	>	if (sm != null) {
1026	>	try {
1027	>	System.setSecurityManager(null);
1028	>	} catch (SecurityException giveUp) {
1029	>	return;
1030	>	}
1031	>	}
1032	>
1033	>	ThreadMXBean threadMXBean = ManagementFactory.getThreadMXBean();
1034	>	System.err.println("------ stacktrace dump start ------");
1035	>	for (ThreadInfo info : threadMXBean.dumpAllThreads(true, true)) {
1036	>	final String name = info.getThreadName();
1037	>	String lockName;
1038	>	if ("Signal Dispatcher".equals(name))
1039	>	continue;
1040	>	if ("Reference Handler".equals(name)
1041	>	&& (lockName = info.getLockName()) != null
1042	>	&& lockName.startsWith("java.lang.ref.Reference$Lock"))
1043	>	continue;
1044	>	if ("Finalizer".equals(name)
1045	>	&& (lockName = info.getLockName()) != null
1046	>	&& lockName.startsWith("java.lang.ref.ReferenceQueue$Lock"))
1047	>	continue;
1048	>	if ("checkForWedgedTest".equals(name))
1049	>	continue;
1050	>	System.err.print(info);
1051	>	}
1052	>	System.err.println("------ stacktrace dump end ------");
1053	>
1054	>	if (sm != null) System.setSecurityManager(sm);
1055	>	}
1056	>
1057	>	/**
1058	>	* Checks that thread does not terminate within the default
1059	>	* millisecond delay of {@code timeoutMillis()}.
1060	>	*/
1061	>	void assertThreadStaysAlive(Thread thread) {
1062	>	assertThreadStaysAlive(thread, timeoutMillis());
1063	>	}
1064	>
1065	>	/**
1066	>	* Checks that thread does not terminate within the given millisecond delay.
1067	>	*/
1068	>	void assertThreadStaysAlive(Thread thread, long millis) {
1069		try {
1070	<	exec.shutdown();
1071	<	assertTrue(exec.awaitTermination(LONG_DELAY_MS, TimeUnit.MILLISECONDS));
1072	<	} catch(InterruptedException ie) {
1073	<	fail("Unexpected exception");
1070	>	// No need to optimize the failing case via Thread.join.
1071	>	delay(millis);
1072	>	assertTrue(thread.isAlive());
1073	>	} catch (InterruptedException fail) {
1074	>	threadFail("Unexpected InterruptedException");
1075		}
1076		}
1077
1078	<
1078	>	/**
1079	>	* Checks that the threads do not terminate within the default
1080	>	* millisecond delay of {@code timeoutMillis()}.
1081	>	*/
1082	>	void assertThreadsStayAlive(Thread... threads) {
1083	>	assertThreadsStayAlive(timeoutMillis(), threads);
1084	>	}
1085	>
1086	>	/**
1087	>	* Checks that the threads do not terminate within the given millisecond delay.
1088	>	*/
1089	>	void assertThreadsStayAlive(long millis, Thread... threads) {
1090	>	try {
1091	>	// No need to optimize the failing case via Thread.join.
1092	>	delay(millis);
1093	>	for (Thread thread : threads)
1094	>	assertTrue(thread.isAlive());
1095	>	} catch (InterruptedException fail) {
1096	>	threadFail("Unexpected InterruptedException");
1097	>	}
1098	>	}
1099	>
1100	>	/**
1101	>	* Checks that future.get times out, with the default timeout of
1102	>	* {@code timeoutMillis()}.
1103	>	*/
1104	>	void assertFutureTimesOut(Future future) {
1105	>	assertFutureTimesOut(future, timeoutMillis());
1106	>	}
1107	>
1108	>	/**
1109	>	* Checks that future.get times out, with the given millisecond timeout.
1110	>	*/
1111	>	void assertFutureTimesOut(Future future, long timeoutMillis) {
1112	>	long startTime = System.nanoTime();
1113	>	try {
1114	>	future.get(timeoutMillis, MILLISECONDS);
1115	>	shouldThrow();
1116	>	} catch (TimeoutException success) {
1117	>	} catch (Exception fail) {
1118	>	threadUnexpectedException(fail);
1119	>	} finally { future.cancel(true); }
1120	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
1121	>	}
1122	>
1123	>	/**
1124	>	* Fails with message "should throw exception".
1125	>	*/
1126		public void shouldThrow() {
1127		fail("Should throw exception");
1128		}
1129
1130	<	public void unexpectedException() {
1131	<	fail("Unexpected exception");
1130	>	/**
1131	>	* Fails with message "should throw " + exceptionName.
1132	>	*/
1133	>	public void shouldThrow(String exceptionName) {
1134	>	fail("Should throw " + exceptionName);
1135		}
1136
169	–
1137		/**
1138		* The number of elements to place in collections, arrays, etc.
1139		*/
#	Line 174 | Line 1141 | public class JSR166TestCase extends Test
1141
1142		// Some convenient Integer constants
1143
1144	<	public static final Integer zero = new Integer(0);
1145	<	public static final Integer one = new Integer(1);
1146	<	public static final Integer two = new Integer(2);
1147	<	public static final Integer three  = new Integer(3);
1144	>	public static final Integer zero  = new Integer(0);
1145	>	public static final Integer one   = new Integer(1);
1146	>	public static final Integer two   = new Integer(2);
1147	>	public static final Integer three = new Integer(3);
1148		public static final Integer four  = new Integer(4);
1149		public static final Integer five  = new Integer(5);
1150	<	public static final Integer six = new Integer(6);
1150	>	public static final Integer six   = new Integer(6);
1151		public static final Integer seven = new Integer(7);
1152		public static final Integer eight = new Integer(8);
1153	<	public static final Integer nine = new Integer(9);
1153	>	public static final Integer nine  = new Integer(9);
1154		public static final Integer m1  = new Integer(-1);
1155		public static final Integer m2  = new Integer(-2);
1156		public static final Integer m3  = new Integer(-3);
1157	<	public static final Integer m4 = new Integer(-4);
1158	<	public static final Integer m5 = new Integer(-5);
1157	>	public static final Integer m4  = new Integer(-4);
1158	>	public static final Integer m5  = new Integer(-5);
1159	>	public static final Integer m6  = new Integer(-6);
1160		public static final Integer m10 = new Integer(-10);
1161
1162	+	/**
1163	+	* Runs Runnable r with a security policy that permits precisely
1164	+	* the specified permissions.  If there is no current security
1165	+	* manager, the runnable is run twice, both with and without a
1166	+	* security manager.  We require that any security manager permit
1167	+	* getPolicy/setPolicy.
1168	+	*/
1169	+	public void runWithPermissions(Runnable r, Permission... permissions) {
1170	+	SecurityManager sm = System.getSecurityManager();
1171	+	if (sm == null) {
1172	+	r.run();
1173	+	}
1174	+	runWithSecurityManagerWithPermissions(r, permissions);
1175	+	}
1176
1177	<	// Some convenient Runnable classes
1177	>	/**
1178	>	* Runs Runnable r with a security policy that permits precisely
1179	>	* the specified permissions.  If there is no current security
1180	>	* manager, a temporary one is set for the duration of the
1181	>	* Runnable.  We require that any security manager permit
1182	>	* getPolicy/setPolicy.
1183	>	*/
1184	>	public void runWithSecurityManagerWithPermissions(Runnable r,
1185	>	Permission... permissions) {
1186	>	SecurityManager sm = System.getSecurityManager();
1187	>	if (sm == null) {
1188	>	Policy savedPolicy = Policy.getPolicy();
1189	>	try {
1190	>	Policy.setPolicy(permissivePolicy());
1191	>	System.setSecurityManager(new SecurityManager());
1192	>	runWithSecurityManagerWithPermissions(r, permissions);
1193	>	} finally {
1194	>	System.setSecurityManager(null);
1195	>	Policy.setPolicy(savedPolicy);
1196	>	}
1197	>	} else {
1198	>	Policy savedPolicy = Policy.getPolicy();
1199	>	AdjustablePolicy policy = new AdjustablePolicy(permissions);
1200	>	Policy.setPolicy(policy);
1201
1202	<	public static class NoOpRunnable implements Runnable {
1203	<	public void run() {}
1202	>	try {
1203	>	r.run();
1204	>	} finally {
1205	>	policy.addPermission(new SecurityPermission("setPolicy"));
1206	>	Policy.setPolicy(savedPolicy);
1207	>	}
1208	>	}
1209		}
1210
1211	<	public static class NoOpCallable implements Callable {
1212	<	public Object call() { return Boolean.TRUE; }
1211	>	/**
1212	>	* Runs a runnable without any permissions.
1213	>	*/
1214	>	public void runWithoutPermissions(Runnable r) {
1215	>	runWithPermissions(r);
1216		}
1217
1218	<	public class ShortRunnable implements Runnable {
1219	<	public void run() {
1220	<	try {
1221	<	Thread.sleep(SHORT_DELAY_MS);
1218	>	/**
1219	>	* A security policy where new permissions can be dynamically added
1220	>	* or all cleared.
1221	>	*/
1222	>	public static class AdjustablePolicy extends java.security.Policy {
1223	>	Permissions perms = new Permissions();
1224	>	AdjustablePolicy(Permission... permissions) {
1225	>	for (Permission permission : permissions)
1226	>	perms.add(permission);
1227	>	}
1228	>	void addPermission(Permission perm) { perms.add(perm); }
1229	>	void clearPermissions() { perms = new Permissions(); }
1230	>	public PermissionCollection getPermissions(CodeSource cs) {
1231	>	return perms;
1232	>	}
1233	>	public PermissionCollection getPermissions(ProtectionDomain pd) {
1234	>	return perms;
1235	>	}
1236	>	public boolean implies(ProtectionDomain pd, Permission p) {
1237	>	return perms.implies(p);
1238	>	}
1239	>	public void refresh() {}
1240	>	public String toString() {
1241	>	List<Permission> ps = new ArrayList<>();
1242	>	for (Enumeration<Permission> e = perms.elements(); e.hasMoreElements();)
1243	>	ps.add(e.nextElement());
1244	>	return "AdjustablePolicy with permissions " + ps;
1245	>	}
1246	>	}
1247	>
1248	>	/**
1249	>	* Returns a policy containing all the permissions we ever need.
1250	>	*/
1251	>	public static Policy permissivePolicy() {
1252	>	return new AdjustablePolicy
1253	>	// Permissions j.u.c. needs directly
1254	>	(new RuntimePermission("modifyThread"),
1255	>	new RuntimePermission("getClassLoader"),
1256	>	new RuntimePermission("setContextClassLoader"),
1257	>	// Permissions needed to change permissions!
1258	>	new SecurityPermission("getPolicy"),
1259	>	new SecurityPermission("setPolicy"),
1260	>	new RuntimePermission("setSecurityManager"),
1261	>	// Permissions needed by the junit test harness
1262	>	new RuntimePermission("accessDeclaredMembers"),
1263	>	new PropertyPermission("*", "read"),
1264	>	new java.io.FilePermission("<<ALL FILES>>", "read"));
1265	>	}
1266	>
1267	>	/**
1268	>	* Sleeps until the given time has elapsed.
1269	>	* Throws AssertionFailedError if interrupted.
1270	>	*/
1271	>	static void sleep(long millis) {
1272	>	try {
1273	>	delay(millis);
1274	>	} catch (InterruptedException fail) {
1275	>	AssertionFailedError afe =
1276	>	new AssertionFailedError("Unexpected InterruptedException");
1277	>	afe.initCause(fail);
1278	>	throw afe;
1279	>	}
1280	>	}
1281	>
1282	>	/**
1283	>	* Spin-waits up to the specified number of milliseconds for the given
1284	>	* thread to enter a wait state: BLOCKED, WAITING, or TIMED_WAITING.
1285	>	*/
1286	>	void waitForThreadToEnterWaitState(Thread thread, long timeoutMillis) {
1287	>	long startTime = 0L;
1288	>	for (;;) {
1289	>	Thread.State s = thread.getState();
1290	>	if (s == Thread.State.BLOCKED ||
1291	>	s == Thread.State.WAITING ||
1292	>	s == Thread.State.TIMED_WAITING)
1293	>	return;
1294	>	else if (s == Thread.State.TERMINATED)
1295	>	fail("Unexpected thread termination");
1296	>	else if (startTime == 0L)
1297	>	startTime = System.nanoTime();
1298	>	else if (millisElapsedSince(startTime) > timeoutMillis) {
1299	>	threadAssertTrue(thread.isAlive());
1300	>	return;
1301		}
1302	<	catch(Exception e) {
1303	<	threadUnexpectedException();
1302	>	Thread.yield();
1303	>	}
1304	>	}
1305	>
1306	>	/**
1307	>	* Waits up to LONG_DELAY_MS for the given thread to enter a wait
1308	>	* state: BLOCKED, WAITING, or TIMED_WAITING.
1309	>	*/
1310	>	void waitForThreadToEnterWaitState(Thread thread) {
1311	>	waitForThreadToEnterWaitState(thread, LONG_DELAY_MS);
1312	>	}
1313	>
1314	>	/**
1315	>	* Returns the number of milliseconds since time given by
1316	>	* startNanoTime, which must have been previously returned from a
1317	>	* call to {@link System#nanoTime()}.
1318	>	*/
1319	>	static long millisElapsedSince(long startNanoTime) {
1320	>	return NANOSECONDS.toMillis(System.nanoTime() - startNanoTime);
1321	>	}
1322	>
1323	>	//     void assertTerminatesPromptly(long timeoutMillis, Runnable r) {
1324	>	//         long startTime = System.nanoTime();
1325	>	//         try {
1326	>	//             r.run();
1327	>	//         } catch (Throwable fail) { threadUnexpectedException(fail); }
1328	>	//         if (millisElapsedSince(startTime) > timeoutMillis/2)
1329	>	//             throw new AssertionFailedError("did not return promptly");
1330	>	//     }
1331	>
1332	>	//     void assertTerminatesPromptly(Runnable r) {
1333	>	//         assertTerminatesPromptly(LONG_DELAY_MS/2, r);
1334	>	//     }
1335	>
1336	>	/**
1337	>	* Checks that timed f.get() returns the expected value, and does not
1338	>	* wait for the timeout to elapse before returning.
1339	>	*/
1340	>	<T> void checkTimedGet(Future<T> f, T expectedValue, long timeoutMillis) {
1341	>	long startTime = System.nanoTime();
1342	>	try {
1343	>	assertEquals(expectedValue, f.get(timeoutMillis, MILLISECONDS));
1344	>	} catch (Throwable fail) { threadUnexpectedException(fail); }
1345	>	if (millisElapsedSince(startTime) > timeoutMillis/2)
1346	>	throw new AssertionFailedError("timed get did not return promptly");
1347	>	}
1348	>
1349	>	<T> void checkTimedGet(Future<T> f, T expectedValue) {
1350	>	checkTimedGet(f, expectedValue, LONG_DELAY_MS);
1351	>	}
1352	>
1353	>	/**
1354	>	* Returns a new started daemon Thread running the given runnable.
1355	>	*/
1356	>	Thread newStartedThread(Runnable runnable) {
1357	>	Thread t = new Thread(runnable);
1358	>	t.setDaemon(true);
1359	>	t.start();
1360	>	return t;
1361	>	}
1362	>
1363	>	/**
1364	>	* Waits for the specified time (in milliseconds) for the thread
1365	>	* to terminate (using {@link Thread#join(long)}), else interrupts
1366	>	* the thread (in the hope that it may terminate later) and fails.
1367	>	*/
1368	>	void awaitTermination(Thread t, long timeoutMillis) {
1369	>	try {
1370	>	t.join(timeoutMillis);
1371	>	} catch (InterruptedException fail) {
1372	>	threadUnexpectedException(fail);
1373	>	} finally {
1374	>	if (t.getState() != Thread.State.TERMINATED) {
1375	>	t.interrupt();
1376	>	threadFail("timed out waiting for thread to terminate");
1377		}
1378		}
1379		}
1380
1381	<	public class ShortInterruptedRunnable implements Runnable {
1382	<	public void run() {
1381	>	/**
1382	>	* Waits for LONG_DELAY_MS milliseconds for the thread to
1383	>	* terminate (using {@link Thread#join(long)}), else interrupts
1384	>	* the thread (in the hope that it may terminate later) and fails.
1385	>	*/
1386	>	void awaitTermination(Thread t) {
1387	>	awaitTermination(t, LONG_DELAY_MS);
1388	>	}
1389	>
1390	>	// Some convenient Runnable classes
1391	>
1392	>	public abstract class CheckedRunnable implements Runnable {
1393	>	protected abstract void realRun() throws Throwable;
1394	>
1395	>	public final void run() {
1396		try {
1397	<	Thread.sleep(SHORT_DELAY_MS);
1398	<	threadShouldThrow();
1397	>	realRun();
1398	>	} catch (Throwable fail) {
1399	>	threadUnexpectedException(fail);
1400		}
1401	<	catch(InterruptedException success) {
1401	>	}
1402	>	}
1403	>
1404	>	public abstract class RunnableShouldThrow implements Runnable {
1405	>	protected abstract void realRun() throws Throwable;
1406	>
1407	>	final Class<?> exceptionClass;
1408	>
1409	>	<T extends Throwable> RunnableShouldThrow(Class<T> exceptionClass) {
1410	>	this.exceptionClass = exceptionClass;
1411	>	}
1412	>
1413	>	public final void run() {
1414	>	try {
1415	>	realRun();
1416	>	threadShouldThrow(exceptionClass.getSimpleName());
1417	>	} catch (Throwable t) {
1418	>	if (! exceptionClass.isInstance(t))
1419	>	threadUnexpectedException(t);
1420		}
1421		}
1422		}
1423
1424	<	public class SmallRunnable implements Runnable {
1425	<	public void run() {
1424	>	public abstract class ThreadShouldThrow extends Thread {
1425	>	protected abstract void realRun() throws Throwable;
1426	>
1427	>	final Class<?> exceptionClass;
1428	>
1429	>	<T extends Throwable> ThreadShouldThrow(Class<T> exceptionClass) {
1430	>	this.exceptionClass = exceptionClass;
1431	>	}
1432	>
1433	>	public final void run() {
1434		try {
1435	<	Thread.sleep(SMALL_DELAY_MS);
1435	>	realRun();
1436	>	threadShouldThrow(exceptionClass.getSimpleName());
1437	>	} catch (Throwable t) {
1438	>	if (! exceptionClass.isInstance(t))
1439	>	threadUnexpectedException(t);
1440		}
1441	<	catch(Exception e) {
1442	<	threadUnexpectedException();
1441	>	}
1442	>	}
1443	>
1444	>	public abstract class CheckedInterruptedRunnable implements Runnable {
1445	>	protected abstract void realRun() throws Throwable;
1446	>
1447	>	public final void run() {
1448	>	try {
1449	>	realRun();
1450	>	threadShouldThrow("InterruptedException");
1451	>	} catch (InterruptedException success) {
1452	>	threadAssertFalse(Thread.interrupted());
1453	>	} catch (Throwable fail) {
1454	>	threadUnexpectedException(fail);
1455		}
1456		}
1457		}
1458
1459	<	public class SmallCallable implements Callable {
1460	<	public Object call() {
1459	>	public abstract class CheckedCallable<T> implements Callable<T> {
1460	>	protected abstract T realCall() throws Throwable;
1461	>
1462	>	public final T call() {
1463		try {
1464	<	Thread.sleep(SMALL_DELAY_MS);
1464	>	return realCall();
1465	>	} catch (Throwable fail) {
1466	>	threadUnexpectedException(fail);
1467	>	return null;
1468		}
1469	<	catch(Exception e) {
1470	<	threadUnexpectedException();
1469	>	}
1470	>	}
1471	>
1472	>	public abstract class CheckedInterruptedCallable<T>
1473	>	implements Callable<T> {
1474	>	protected abstract T realCall() throws Throwable;
1475	>
1476	>	public final T call() {
1477	>	try {
1478	>	T result = realCall();
1479	>	threadShouldThrow("InterruptedException");
1480	>	return result;
1481	>	} catch (InterruptedException success) {
1482	>	threadAssertFalse(Thread.interrupted());
1483	>	} catch (Throwable fail) {
1484	>	threadUnexpectedException(fail);
1485		}
1486	+	return null;
1487	+	}
1488	+	}
1489	+
1490	+	public static class NoOpRunnable implements Runnable {
1491	+	public void run() {}
1492	+	}
1493	+
1494	+	public static class NoOpCallable implements Callable {
1495	+	public Object call() { return Boolean.TRUE; }
1496	+	}
1497	+
1498	+	public static final String TEST_STRING = "a test string";
1499	+
1500	+	public static class StringTask implements Callable<String> {
1501	+	final String value;
1502	+	public StringTask() { this(TEST_STRING); }
1503	+	public StringTask(String value) { this.value = value; }
1504	+	public String call() { return value; }
1505	+	}
1506	+
1507	+	public Callable<String> latchAwaitingStringTask(final CountDownLatch latch) {
1508	+	return new CheckedCallable<String>() {
1509	+	protected String realCall() {
1510	+	try {
1511	+	latch.await();
1512	+	} catch (InterruptedException quittingTime) {}
1513	+	return TEST_STRING;
1514	+	}};
1515	+	}
1516	+
1517	+	public Runnable countDowner(final CountDownLatch latch) {
1518	+	return new CheckedRunnable() {
1519	+	public void realRun() throws InterruptedException {
1520	+	latch.countDown();
1521	+	}};
1522	+	}
1523	+
1524	+	class LatchAwaiter extends CheckedRunnable {
1525	+	static final int NEW = 0;
1526	+	static final int RUNNING = 1;
1527	+	static final int DONE = 2;
1528	+	final CountDownLatch latch;
1529	+	int state = NEW;
1530	+	LatchAwaiter(CountDownLatch latch) { this.latch = latch; }
1531	+	public void realRun() throws InterruptedException {
1532	+	state = 1;
1533	+	await(latch);
1534	+	state = 2;
1535	+	}
1536	+	}
1537	+
1538	+	public LatchAwaiter awaiter(CountDownLatch latch) {
1539	+	return new LatchAwaiter(latch);
1540	+	}
1541	+
1542	+	public void await(CountDownLatch latch, long timeoutMillis) {
1543	+	try {
1544	+	if (!latch.await(timeoutMillis, MILLISECONDS))
1545	+	fail("timed out waiting for CountDownLatch for "
1546	+	+ (timeoutMillis/1000) + " sec");
1547	+	} catch (Throwable fail) {
1548	+	threadUnexpectedException(fail);
1549	+	}
1550	+	}
1551	+
1552	+	public void await(CountDownLatch latch) {
1553	+	await(latch, LONG_DELAY_MS);
1554	+	}
1555	+
1556	+	public void await(Semaphore semaphore) {
1557	+	try {
1558	+	if (!semaphore.tryAcquire(LONG_DELAY_MS, MILLISECONDS))
1559	+	fail("timed out waiting for Semaphore for "
1560	+	+ (LONG_DELAY_MS/1000) + " sec");
1561	+	} catch (Throwable fail) {
1562	+	threadUnexpectedException(fail);
1563	+	}
1564	+	}
1565	+
1566	+	//     /**
1567	+	//      * Spin-waits up to LONG_DELAY_MS until flag becomes true.
1568	+	//      */
1569	+	//     public void await(AtomicBoolean flag) {
1570	+	//         await(flag, LONG_DELAY_MS);
1571	+	//     }
1572	+
1573	+	//     /**
1574	+	//      * Spin-waits up to the specified timeout until flag becomes true.
1575	+	//      */
1576	+	//     public void await(AtomicBoolean flag, long timeoutMillis) {
1577	+	//         long startTime = System.nanoTime();
1578	+	//         while (!flag.get()) {
1579	+	//             if (millisElapsedSince(startTime) > timeoutMillis)
1580	+	//                 throw new AssertionFailedError("timed out");
1581	+	//             Thread.yield();
1582	+	//         }
1583	+	//     }
1584	+
1585	+	public static class NPETask implements Callable<String> {
1586	+	public String call() { throw new NullPointerException(); }
1587	+	}
1588	+
1589	+	public static class CallableOne implements Callable<Integer> {
1590	+	public Integer call() { return one; }
1591	+	}
1592	+
1593	+	public class ShortRunnable extends CheckedRunnable {
1594	+	protected void realRun() throws Throwable {
1595	+	delay(SHORT_DELAY_MS);
1596	+	}
1597	+	}
1598	+
1599	+	public class ShortInterruptedRunnable extends CheckedInterruptedRunnable {
1600	+	protected void realRun() throws InterruptedException {
1601	+	delay(SHORT_DELAY_MS);
1602	+	}
1603	+	}
1604	+
1605	+	public class SmallRunnable extends CheckedRunnable {
1606	+	protected void realRun() throws Throwable {
1607	+	delay(SMALL_DELAY_MS);
1608	+	}
1609	+	}
1610	+
1611	+	public class SmallPossiblyInterruptedRunnable extends CheckedRunnable {
1612	+	protected void realRun() {
1613	+	try {
1614	+	delay(SMALL_DELAY_MS);
1615	+	} catch (InterruptedException ok) {}
1616	+	}
1617	+	}
1618	+
1619	+	public class SmallCallable extends CheckedCallable {
1620	+	protected Object realCall() throws InterruptedException {
1621	+	delay(SMALL_DELAY_MS);
1622		return Boolean.TRUE;
1623		}
1624		}
1625
1626	<	public class SmallInterruptedRunnable implements Runnable {
1626	>	public class MediumRunnable extends CheckedRunnable {
1627	>	protected void realRun() throws Throwable {
1628	>	delay(MEDIUM_DELAY_MS);
1629	>	}
1630	>	}
1631	>
1632	>	public class MediumInterruptedRunnable extends CheckedInterruptedRunnable {
1633	>	protected void realRun() throws InterruptedException {
1634	>	delay(MEDIUM_DELAY_MS);
1635	>	}
1636	>	}
1637	>
1638	>	public Runnable possiblyInterruptedRunnable(final long timeoutMillis) {
1639	>	return new CheckedRunnable() {
1640	>	protected void realRun() {
1641	>	try {
1642	>	delay(timeoutMillis);
1643	>	} catch (InterruptedException ok) {}
1644	>	}};
1645	>	}
1646	>
1647	>	public class MediumPossiblyInterruptedRunnable extends CheckedRunnable {
1648	>	protected void realRun() {
1649	>	try {
1650	>	delay(MEDIUM_DELAY_MS);
1651	>	} catch (InterruptedException ok) {}
1652	>	}
1653	>	}
1654	>
1655	>	public class LongPossiblyInterruptedRunnable extends CheckedRunnable {
1656	>	protected void realRun() {
1657	>	try {
1658	>	delay(LONG_DELAY_MS);
1659	>	} catch (InterruptedException ok) {}
1660	>	}
1661	>	}
1662	>
1663	>	/**
1664	>	* For use as ThreadFactory in constructors
1665	>	*/
1666	>	public static class SimpleThreadFactory implements ThreadFactory {
1667	>	public Thread newThread(Runnable r) {
1668	>	return new Thread(r);
1669	>	}
1670	>	}
1671	>
1672	>	public interface TrackedRunnable extends Runnable {
1673	>	boolean isDone();
1674	>	}
1675	>
1676	>	public static TrackedRunnable trackedRunnable(final long timeoutMillis) {
1677	>	return new TrackedRunnable() {
1678	>	private volatile boolean done = false;
1679	>	public boolean isDone() { return done; }
1680	>	public void run() {
1681	>	try {
1682	>	delay(timeoutMillis);
1683	>	done = true;
1684	>	} catch (InterruptedException ok) {}
1685	>	}
1686	>	};
1687	>	}
1688	>
1689	>	public static class TrackedShortRunnable implements Runnable {
1690	>	public volatile boolean done = false;
1691		public void run() {
1692		try {
1693	<	Thread.sleep(SMALL_DELAY_MS);
1694	<	threadShouldThrow();
1695	<	}
256	<	catch(InterruptedException success) {
257	<	}
1693	>	delay(SHORT_DELAY_MS);
1694	>	done = true;
1695	>	} catch (InterruptedException ok) {}
1696		}
1697		}
1698
1699	+	public static class TrackedSmallRunnable implements Runnable {
1700	+	public volatile boolean done = false;
1701	+	public void run() {
1702	+	try {
1703	+	delay(SMALL_DELAY_MS);
1704	+	done = true;
1705	+	} catch (InterruptedException ok) {}
1706	+	}
1707	+	}
1708
1709	<	public class MediumRunnable implements Runnable {
1709	>	public static class TrackedMediumRunnable implements Runnable {
1710	>	public volatile boolean done = false;
1711		public void run() {
1712		try {
1713	<	Thread.sleep(MEDIUM_DELAY_MS);
1714	<	}
1715	<	catch(Exception e) {
1716	<	threadUnexpectedException();
1717	<	}
1713	>	delay(MEDIUM_DELAY_MS);
1714	>	done = true;
1715	>	} catch (InterruptedException ok) {}
1716	>	}
1717	>	}
1718	>
1719	>	public static class TrackedLongRunnable implements Runnable {
1720	>	public volatile boolean done = false;
1721	>	public void run() {
1722	>	try {
1723	>	delay(LONG_DELAY_MS);
1724	>	done = true;
1725	>	} catch (InterruptedException ok) {}
1726		}
1727		}
1728
1729	<	public class MediumInterruptedRunnable implements Runnable {
1729	>	public static class TrackedNoOpRunnable implements Runnable {
1730	>	public volatile boolean done = false;
1731		public void run() {
1732	+	done = true;
1733	+	}
1734	+	}
1735	+
1736	+	public static class TrackedCallable implements Callable {
1737	+	public volatile boolean done = false;
1738	+	public Object call() {
1739	+	try {
1740	+	delay(SMALL_DELAY_MS);
1741	+	done = true;
1742	+	} catch (InterruptedException ok) {}
1743	+	return Boolean.TRUE;
1744	+	}
1745	+	}
1746	+
1747	+	/**
1748	+	* Analog of CheckedRunnable for RecursiveAction
1749	+	*/
1750	+	public abstract class CheckedRecursiveAction extends RecursiveAction {
1751	+	protected abstract void realCompute() throws Throwable;
1752	+
1753	+	@Override protected final void compute() {
1754		try {
1755	<	Thread.sleep(MEDIUM_DELAY_MS);
1756	<	threadShouldThrow();
1755	>	realCompute();
1756	>	} catch (Throwable fail) {
1757	>	threadUnexpectedException(fail);
1758		}
1759	<	catch(InterruptedException success) {
1759	>	}
1760	>	}
1761	>
1762	>	/**
1763	>	* Analog of CheckedCallable for RecursiveTask
1764	>	*/
1765	>	public abstract class CheckedRecursiveTask<T> extends RecursiveTask<T> {
1766	>	protected abstract T realCompute() throws Throwable;
1767	>
1768	>	@Override protected final T compute() {
1769	>	try {
1770	>	return realCompute();
1771	>	} catch (Throwable fail) {
1772	>	threadUnexpectedException(fail);
1773	>	return null;
1774		}
1775		}
1776		}
1777
1778	<	public class MediumPossiblyInterruptedRunnable implements Runnable {
1779	<	public void run() {
1778	>	/**
1779	>	* For use as RejectedExecutionHandler in constructors
1780	>	*/
1781	>	public static class NoOpREHandler implements RejectedExecutionHandler {
1782	>	public void rejectedExecution(Runnable r,
1783	>	ThreadPoolExecutor executor) {}
1784	>	}
1785	>
1786	>	/**
1787	>	* A CyclicBarrier that uses timed await and fails with
1788	>	* AssertionFailedErrors instead of throwing checked exceptions.
1789	>	*/
1790	>	public static class CheckedBarrier extends CyclicBarrier {
1791	>	public CheckedBarrier(int parties) { super(parties); }
1792	>
1793	>	public int await() {
1794		try {
1795	<	Thread.sleep(MEDIUM_DELAY_MS);
1795	>	return super.await(2 * LONG_DELAY_MS, MILLISECONDS);
1796	>	} catch (TimeoutException timedOut) {
1797	>	throw new AssertionFailedError("timed out");
1798	>	} catch (Exception fail) {
1799	>	AssertionFailedError afe =
1800	>	new AssertionFailedError("Unexpected exception: " + fail);
1801	>	afe.initCause(fail);
1802	>	throw afe;
1803		}
1804	<	catch(InterruptedException success) {
1804	>	}
1805	>	}
1806	>
1807	>	void checkEmpty(BlockingQueue q) {
1808	>	try {
1809	>	assertTrue(q.isEmpty());
1810	>	assertEquals(0, q.size());
1811	>	assertNull(q.peek());
1812	>	assertNull(q.poll());
1813	>	assertNull(q.poll(0, MILLISECONDS));
1814	>	assertEquals(q.toString(), "[]");
1815	>	assertTrue(Arrays.equals(q.toArray(), new Object[0]));
1816	>	assertFalse(q.iterator().hasNext());
1817	>	try {
1818	>	q.element();
1819	>	shouldThrow();
1820	>	} catch (NoSuchElementException success) {}
1821	>	try {
1822	>	q.iterator().next();
1823	>	shouldThrow();
1824	>	} catch (NoSuchElementException success) {}
1825	>	try {
1826	>	q.remove();
1827	>	shouldThrow();
1828	>	} catch (NoSuchElementException success) {}
1829	>	} catch (InterruptedException fail) { threadUnexpectedException(fail); }
1830	>	}
1831	>
1832	>	void assertSerialEquals(Object x, Object y) {
1833	>	assertTrue(Arrays.equals(serialBytes(x), serialBytes(y)));
1834	>	}
1835	>
1836	>	void assertNotSerialEquals(Object x, Object y) {
1837	>	assertFalse(Arrays.equals(serialBytes(x), serialBytes(y)));
1838	>	}
1839	>
1840	>	byte[] serialBytes(Object o) {
1841	>	try {
1842	>	ByteArrayOutputStream bos = new ByteArrayOutputStream();
1843	>	ObjectOutputStream oos = new ObjectOutputStream(bos);
1844	>	oos.writeObject(o);
1845	>	oos.flush();
1846	>	oos.close();
1847	>	return bos.toByteArray();
1848	>	} catch (Throwable fail) {
1849	>	threadUnexpectedException(fail);
1850	>	return new byte[0];
1851	>	}
1852	>	}
1853	>
1854	>	void assertImmutable(final Object o) {
1855	>	if (o instanceof Collection) {
1856	>	assertThrows(
1857	>	UnsupportedOperationException.class,
1858	>	new Runnable() { public void run() {
1859	>	((Collection) o).add(null);}});
1860	>	}
1861	>	}
1862	>
1863	>	@SuppressWarnings("unchecked")
1864	>	<T> T serialClone(T o) {
1865	>	try {
1866	>	ObjectInputStream ois = new ObjectInputStream
1867	>	(new ByteArrayInputStream(serialBytes(o)));
1868	>	T clone = (T) ois.readObject();
1869	>	if (o == clone) assertImmutable(o);
1870	>	assertSame(o.getClass(), clone.getClass());
1871	>	return clone;
1872	>	} catch (Throwable fail) {
1873	>	threadUnexpectedException(fail);
1874	>	return null;
1875	>	}
1876	>	}
1877	>
1878	>	/**
1879	>	* A version of serialClone that leaves error handling (for
1880	>	* e.g. NotSerializableException) up to the caller.
1881	>	*/
1882	>	@SuppressWarnings("unchecked")
1883	>	<T> T serialClonePossiblyFailing(T o)
1884	>	throws ReflectiveOperationException, java.io.IOException {
1885	>	ByteArrayOutputStream bos = new ByteArrayOutputStream();
1886	>	ObjectOutputStream oos = new ObjectOutputStream(bos);
1887	>	oos.writeObject(o);
1888	>	oos.flush();
1889	>	oos.close();
1890	>	ObjectInputStream ois = new ObjectInputStream
1891	>	(new ByteArrayInputStream(bos.toByteArray()));
1892	>	T clone = (T) ois.readObject();
1893	>	if (o == clone) assertImmutable(o);
1894	>	assertSame(o.getClass(), clone.getClass());
1895	>	return clone;
1896	>	}
1897	>
1898	>	/**
1899	>	* If o implements Cloneable and has a public clone method,
1900	>	* returns a clone of o, else null.
1901	>	*/
1902	>	@SuppressWarnings("unchecked")
1903	>	<T> T cloneableClone(T o) {
1904	>	if (!(o instanceof Cloneable)) return null;
1905	>	final T clone;
1906	>	try {
1907	>	clone = (T) o.getClass().getMethod("clone").invoke(o);
1908	>	} catch (NoSuchMethodException ok) {
1909	>	return null;
1910	>	} catch (ReflectiveOperationException unexpected) {
1911	>	throw new Error(unexpected);
1912	>	}
1913	>	assertNotSame(o, clone); // not 100% guaranteed by spec
1914	>	assertSame(o.getClass(), clone.getClass());
1915	>	return clone;
1916	>	}
1917	>
1918	>	public void assertThrows(Class<? extends Throwable> expectedExceptionClass,
1919	>	Runnable... throwingActions) {
1920	>	for (Runnable throwingAction : throwingActions) {
1921	>	boolean threw = false;
1922	>	try { throwingAction.run(); }
1923	>	catch (Throwable t) {
1924	>	threw = true;
1925	>	if (!expectedExceptionClass.isInstance(t)) {
1926	>	AssertionFailedError afe =
1927	>	new AssertionFailedError
1928	>	("Expected " + expectedExceptionClass.getName() +
1929	>	", got " + t.getClass().getName());
1930	>	afe.initCause(t);
1931	>	threadUnexpectedException(afe);
1932	>	}
1933		}
1934	+	if (!threw)
1935	+	shouldThrow(expectedExceptionClass.getName());
1936		}
1937		}
1938	<
1938	>
1939	>	public void assertIteratorExhausted(Iterator<?> it) {
1940	>	try {
1941	>	it.next();
1942	>	shouldThrow();
1943	>	} catch (NoSuchElementException success) {}
1944	>	assertFalse(it.hasNext());
1945	>	}
1946	>
1947	>	public <T> Callable<T> callableThrowing(final Exception ex) {
1948	>	return new Callable<T>() { public T call() throws Exception { throw ex; }};
1949	>	}
1950	>
1951	>	public Runnable runnableThrowing(final RuntimeException ex) {
1952	>	return new Runnable() { public void run() { throw ex; }};
1953	>	}
1954	>
1955	>	/** A reusable thread pool to be shared by tests. */
1956	>	static final ExecutorService cachedThreadPool =
1957	>	new ThreadPoolExecutor(0, Integer.MAX_VALUE,
1958	>	1000L, MILLISECONDS,
1959	>	new SynchronousQueue<Runnable>());
1960	>
1961	>	static <T> void shuffle(T[] array) {
1962	>	Collections.shuffle(Arrays.asList(array), ThreadLocalRandom.current());
1963	>	}
1964		}

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