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

Comparing jsr166/src/test/tck/JSR166TestCase.java (file contents):
Revision 1.1 by dl, Sun Sep 14 20:42:40 2003 UTC vs.
Revision 1.206 by jsr166, Tue Oct 25 01:32:55 2016 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
12	>	* @modules java.management
13	>	* @build *
14	>	* @run junit/othervm/timeout=1000 -Djsr166.testImplementationDetails=true JSR166TestCase
15	>	* @run junit/othervm/timeout=1000 -Djava.util.concurrent.ForkJoinPool.common.parallelism=0 -Djsr166.testImplementationDetails=true JSR166TestCase
16	>	* @run junit/othervm/timeout=1000 -Djava.util.concurrent.ForkJoinPool.common.parallelism=1 -Djava.util.secureRandomSeed=true JSR166TestCase
17	>	*/
18
19	+	import static java.util.concurrent.TimeUnit.MILLISECONDS;
20	+	import static java.util.concurrent.TimeUnit.MINUTES;
21	+	import static java.util.concurrent.TimeUnit.NANOSECONDS;
22	+
23	+	import java.io.ByteArrayInputStream;
24	+	import java.io.ByteArrayOutputStream;
25	+	import java.io.ObjectInputStream;
26	+	import java.io.ObjectOutputStream;
27	+	import java.lang.management.ManagementFactory;
28	+	import java.lang.management.ThreadInfo;
29	+	import java.lang.management.ThreadMXBean;
30	+	import java.lang.reflect.Constructor;
31	+	import java.lang.reflect.Method;
32	+	import java.lang.reflect.Modifier;
33	+	import java.nio.file.Files;
34	+	import java.nio.file.Paths;
35	+	import java.security.CodeSource;
36	+	import java.security.Permission;
37	+	import java.security.PermissionCollection;
38	+	import java.security.Permissions;
39	+	import java.security.Policy;
40	+	import java.security.ProtectionDomain;
41	+	import java.security.SecurityPermission;
42	+	import java.util.ArrayList;
43	+	import java.util.Arrays;
44	+	import java.util.Collections;
45	+	import java.util.Date;
46	+	import java.util.Enumeration;
47	+	import java.util.Iterator;
48	+	import java.util.List;
49	+	import java.util.NoSuchElementException;
50	+	import java.util.PropertyPermission;
51	+	import java.util.concurrent.BlockingQueue;
52	+	import java.util.concurrent.Callable;
53	+	import java.util.concurrent.CountDownLatch;
54	+	import java.util.concurrent.CyclicBarrier;
55	+	import java.util.concurrent.ExecutionException;
56	+	import java.util.concurrent.Executors;
57	+	import java.util.concurrent.ExecutorService;
58	+	import java.util.concurrent.ForkJoinPool;
59	+	import java.util.concurrent.Future;
60	+	import java.util.concurrent.RecursiveAction;
61	+	import java.util.concurrent.RecursiveTask;
62	+	import java.util.concurrent.RejectedExecutionHandler;
63	+	import java.util.concurrent.Semaphore;
64	+	import java.util.concurrent.SynchronousQueue;
65	+	import java.util.concurrent.ThreadFactory;
66	+	import java.util.concurrent.ThreadLocalRandom;
67	+	import java.util.concurrent.ThreadPoolExecutor;
68	+	import java.util.concurrent.TimeoutException;
69	+	import java.util.concurrent.atomic.AtomicBoolean;
70	+	import java.util.concurrent.atomic.AtomicReference;
71	+	import java.util.regex.Matcher;
72	+	import java.util.regex.Pattern;
73	+
74	+	import junit.framework.AssertionFailedError;
75	+	import junit.framework.Test;
76	+	import junit.framework.TestCase;
77	+	import junit.framework.TestResult;
78	+	import junit.framework.TestSuite;
79
80		/**
81	<	* Base class for JSR166 Junit TCK tests.  Defines some constants and
82	<	* utility methods, as well as a simple framework for helping to make
83	<	* sure that assertions failing in generated threads cause the
84	<	* associated test that generated them to itself fail (which JUnit doe
85	<	* not otherwise arrange).  The rules for creating such tests are:
81	>	* Base class for JSR166 Junit TCK tests.  Defines some constants,
82	>	* utility methods and classes, as well as a simple framework for
83	>	* helping to make sure that assertions failing in generated threads
84	>	* cause the associated test that generated them to itself fail (which
85	>	* JUnit does not otherwise arrange).  The rules for creating such
86	>	* tests are:
87		*
88		* <ol>
89		*
90	<	* <li> All assertions in code running in generated threads must use
91	<	* the forms {@link threadFail} , {@link threadAssertTrue} {@link
92	<	* threadAssertEquals}, or {@link threadAssertNull}, (not
93	<	* <tt>fail</tt>, <tt>assertTrue</tt>, etc.) It is OK (but not
90	>	* <li>All assertions in code running in generated threads must use
91	>	* the forms {@link #threadFail}, {@link #threadAssertTrue}, {@link
92	>	* #threadAssertEquals}, or {@link #threadAssertNull}, (not
93	>	* {@code fail}, {@code assertTrue}, etc.) It is OK (but not
94		* particularly recommended) for other code to use these forms too.
95		* Only the most typically used JUnit assertion methods are defined
96	<	* this way, but enough to live with.</li>
96	>	* this way, but enough to live with.
97		*
98	<	* <li> If you override {@link setUp} or {@link tearDown}, make sure
99	<	* to invoke <tt>super.setUp</tt> and <tt>super.tearDown</tt> within
98	>	* <li>If you override {@link #setUp} or {@link #tearDown}, make sure
99	>	* to invoke {@code super.setUp} and {@code super.tearDown} within
100		* them. These methods are used to clear and check for thread
101	<	* assertion failures.</li>
101	>	* assertion failures.
102		*
103	<	* <li>All delays and timeouts must use one of the constants {@link
104	<	* SHORT_DELAY_MS}, {@link SMALL_DELAY_MS}, {@link MEDIUM_DELAY_MS},
105	<	* {@link LONG_DELAY_MS}. The idea here is that a SHORT is always
106	<	* discriminatable from zero time, and always allows enough time for
107	<	* the small amounts of computation (creating a thread, calling a few
103	>	* <li>All delays and timeouts must use one of the constants {@code
104	>	* SHORT_DELAY_MS}, {@code SMALL_DELAY_MS}, {@code MEDIUM_DELAY_MS},
105	>	* {@code LONG_DELAY_MS}. The idea here is that a SHORT is always
106	>	* discriminable from zero time, and always allows enough time for the
107	>	* small amounts of computation (creating a thread, calling a few
108		* methods, etc) needed to reach a timeout point. Similarly, a SMALL
109		* is always discriminable as larger than SHORT and smaller than
110		* MEDIUM.  And so on. These constants are set to conservative values,
111	<	* (100, 500, 1000, 5000 MS) but even so, if there is ever any doubt,
112	<	* they can all be increased in one spot to rerun tests on slower
113	<	* platforms</li>
114	<	*
115	<	* <li> All threads generated must be joined inside each test case
116	<	* method (or <tt>fail</tt> to do so) before returning from the
117	<	* method. The {@link joinPool} method can be used to do this when
51	<	* using Executors.</li>
111	>	* but even so, if there is ever any doubt, they can all be increased
112	>	* in one spot to rerun tests on slower platforms.
113	>	*
114	>	* <li>All threads generated must be joined inside each test case
115	>	* method (or {@code fail} to do so) before returning from the
116	>	* method. The {@code joinPool} method can be used to do this when
117	>	* using Executors.
118		*
119		* </ol>
120	+	*
121	+	* <p><b>Other notes</b>
122	+	* <ul>
123	+	*
124	+	* <li>Usually, there is one testcase method per JSR166 method
125	+	* covering "normal" operation, and then as many exception-testing
126	+	* methods as there are exceptions the method can throw. Sometimes
127	+	* there are multiple tests per JSR166 method when the different
128	+	* "normal" behaviors differ significantly. And sometimes testcases
129	+	* cover multiple methods when they cannot be tested in isolation.
130	+	*
131	+	* <li>The documentation style for testcases is to provide as javadoc
132	+	* a simple sentence or two describing the property that the testcase
133	+	* method purports to test. The javadocs do not say anything about how
134	+	* the property is tested. To find out, read the code.
135	+	*
136	+	* <li>These tests are "conformance tests", and do not attempt to
137	+	* test throughput, latency, scalability or other performance factors
138	+	* (see the separate "jtreg" tests for a set intended to check these
139	+	* for the most central aspects of functionality.) So, most tests use
140	+	* the smallest sensible numbers of threads, collection sizes, etc
141	+	* needed to check basic conformance.
142	+	*
143	+	* <li>The test classes currently do not declare inclusion in
144	+	* any particular package to simplify things for people integrating
145	+	* them in TCK test suites.
146	+	*
147	+	* <li>As a convenience, the {@code main} of this class (JSR166TestCase)
148	+	* runs all JSR166 unit tests.
149	+	*
150	+	* </ul>
151		*/
152		public class JSR166TestCase extends TestCase {
153	+	private static final boolean useSecurityManager =
154	+	Boolean.getBoolean("jsr166.useSecurityManager");
155	+
156	+	protected static final boolean expensiveTests =
157	+	Boolean.getBoolean("jsr166.expensiveTests");
158	+
159	+	/**
160	+	* If true, also run tests that are not part of the official tck
161	+	* because they test unspecified implementation details.
162	+	*/
163	+	protected static final boolean testImplementationDetails =
164	+	Boolean.getBoolean("jsr166.testImplementationDetails");
165	+
166	+	/**
167	+	* If true, report on stdout all "slow" tests, that is, ones that
168	+	* take more than profileThreshold milliseconds to execute.
169	+	*/
170	+	private static final boolean profileTests =
171	+	Boolean.getBoolean("jsr166.profileTests");
172	+
173	+	/**
174	+	* The number of milliseconds that tests are permitted for
175	+	* execution without being reported, when profileTests is set.
176	+	*/
177	+	private static final long profileThreshold =
178	+	Long.getLong("jsr166.profileThreshold", 100);
179	+
180	+	/**
181	+	* The number of repetitions per test (for tickling rare bugs).
182	+	*/
183	+	private static final int runsPerTest =
184	+	Integer.getInteger("jsr166.runsPerTest", 1);
185	+
186	+	/**
187	+	* The number of repetitions of the test suite (for finding leaks?).
188	+	*/
189	+	private static final int suiteRuns =
190	+	Integer.getInteger("jsr166.suiteRuns", 1);
191	+
192	+	/**
193	+	* Returns the value of the system property, or NaN if not defined.
194	+	*/
195	+	private static float systemPropertyValue(String name) {
196	+	String floatString = System.getProperty(name);
197	+	if (floatString == null)
198	+	return Float.NaN;
199	+	try {
200	+	return Float.parseFloat(floatString);
201	+	} catch (NumberFormatException ex) {
202	+	throw new IllegalArgumentException(
203	+	String.format("Bad float value in system property %s=%s",
204	+	name, floatString));
205	+	}
206	+	}
207	+
208	+	/**
209	+	* The scaling factor to apply to standard delays used in tests.
210	+	* May be initialized from any of:
211	+	* - the "jsr166.delay.factor" system property
212	+	* - the "test.timeout.factor" system property (as used by jtreg)
213	+	*   See: http://openjdk.java.net/jtreg/tag-spec.html
214	+	* - hard-coded fuzz factor when using a known slowpoke VM
215	+	*/
216	+	private static final float delayFactor = delayFactor();
217	+
218	+	private static float delayFactor() {
219	+	float x;
220	+	if (!Float.isNaN(x = systemPropertyValue("jsr166.delay.factor")))
221	+	return x;
222	+	if (!Float.isNaN(x = systemPropertyValue("test.timeout.factor")))
223	+	return x;
224	+	String prop = System.getProperty("java.vm.version");
225	+	if (prop != null && prop.matches(".*debug.*"))
226	+	return 4.0f; // How much slower is fastdebug than product?!
227	+	return 1.0f;
228	+	}
229	+
230	+	public JSR166TestCase() { super(); }
231	+	public JSR166TestCase(String name) { super(name); }
232	+
233	+	/**
234	+	* A filter for tests to run, matching strings of the form
235	+	* methodName(className), e.g. "testInvokeAll5(ForkJoinPoolTest)"
236	+	* Usefully combined with jsr166.runsPerTest.
237	+	*/
238	+	private static final Pattern methodFilter = methodFilter();
239	+
240	+	private static Pattern methodFilter() {
241	+	String regex = System.getProperty("jsr166.methodFilter");
242	+	return (regex == null) ? null : Pattern.compile(regex);
243	+	}
244	+
245	+	// Instrumentation to debug very rare, but very annoying hung test runs.
246	+	static volatile TestCase currentTestCase;
247	+	// static volatile int currentRun = 0;
248	+	static {
249	+	Runnable checkForWedgedTest = new Runnable() { public void run() {
250	+	// Avoid spurious reports with enormous runsPerTest.
251	+	// A single test case run should never take more than 1 second.
252	+	// But let's cap it at the high end too ...
253	+	final int timeoutMinutes =
254	+	Math.min(15, Math.max(runsPerTest / 60, 1));
255	+	for (TestCase lastTestCase = currentTestCase;;) {
256	+	try { MINUTES.sleep(timeoutMinutes); }
257	+	catch (InterruptedException unexpected) { break; }
258	+	if (lastTestCase == currentTestCase) {
259	+	System.err.printf(
260	+	"Looks like we're stuck running test: %s%n",
261	+	lastTestCase);
262	+	//                     System.err.printf(
263	+	//                         "Looks like we're stuck running test: %s (%d/%d)%n",
264	+	//                         lastTestCase, currentRun, runsPerTest);
265	+	//                     System.err.println("availableProcessors=" +
266	+	//                         Runtime.getRuntime().availableProcessors());
267	+	//                     System.err.printf("cpu model = %s%n", cpuModel());
268	+	dumpTestThreads();
269	+	// one stack dump is probably enough; more would be spam
270	+	break;
271	+	}
272	+	lastTestCase = currentTestCase;
273	+	}}};
274	+	Thread thread = new Thread(checkForWedgedTest, "checkForWedgedTest");
275	+	thread.setDaemon(true);
276	+	thread.start();
277	+	}
278	+
279	+	//     public static String cpuModel() {
280	+	//         try {
281	+	//             Matcher matcher = Pattern.compile("model name\\s*: (.*)")
282	+	//                 .matcher(new String(
283	+	//                      Files.readAllBytes(Paths.get("/proc/cpuinfo")), "UTF-8"));
284	+	//             matcher.find();
285	+	//             return matcher.group(1);
286	+	//         } catch (Exception ex) { return null; }
287	+	//     }
288	+
289	+	public void runBare() throws Throwable {
290	+	currentTestCase = this;
291	+	if (methodFilter == null
292	+	|| methodFilter.matcher(toString()).find())
293	+	super.runBare();
294	+	}
295	+
296	+	protected void runTest() throws Throwable {
297	+	for (int i = 0; i < runsPerTest; i++) {
298	+	// currentRun = i;
299	+	if (profileTests)
300	+	runTestProfiled();
301	+	else
302	+	super.runTest();
303	+	}
304	+	}
305	+
306	+	protected void runTestProfiled() throws Throwable {
307	+	for (int i = 0; i < 2; i++) {
308	+	long startTime = System.nanoTime();
309	+	super.runTest();
310	+	long elapsedMillis = millisElapsedSince(startTime);
311	+	if (elapsedMillis < profileThreshold)
312	+	break;
313	+	// Never report first run of any test; treat it as a
314	+	// warmup run, notably to trigger all needed classloading,
315	+	if (i > 0)
316	+	System.out.printf("%n%s: %d%n", toString(), elapsedMillis);
317	+	}
318	+	}
319	+
320	+	/**
321	+	* Runs all JSR166 unit tests using junit.textui.TestRunner.
322	+	*/
323	+	public static void main(String[] args) {
324	+	main(suite(), args);
325	+	}
326	+
327	+	static class PithyResultPrinter extends junit.textui.ResultPrinter {
328	+	PithyResultPrinter(java.io.PrintStream writer) { super(writer); }
329	+	long runTime;
330	+	public void startTest(Test test) {}
331	+	protected void printHeader(long runTime) {
332	+	this.runTime = runTime; // defer printing for later
333	+	}
334	+	protected void printFooter(TestResult result) {
335	+	if (result.wasSuccessful()) {
336	+	getWriter().println("OK (" + result.runCount() + " tests)"
337	+	+ "  Time: " + elapsedTimeAsString(runTime));
338	+	} else {
339	+	getWriter().println("Time: " + elapsedTimeAsString(runTime));
340	+	super.printFooter(result);
341	+	}
342	+	}
343	+	}
344	+
345	+	/**
346	+	* Returns a TestRunner that doesn't bother with unnecessary
347	+	* fluff, like printing a "." for each test case.
348	+	*/
349	+	static junit.textui.TestRunner newPithyTestRunner() {
350	+	junit.textui.TestRunner runner = new junit.textui.TestRunner();
351	+	runner.setPrinter(new PithyResultPrinter(System.out));
352	+	return runner;
353	+	}
354	+
355	+	/**
356	+	* Runs all unit tests in the given test suite.
357	+	* Actual behavior influenced by jsr166.* system properties.
358	+	*/
359	+	static void main(Test suite, String[] args) {
360	+	if (useSecurityManager) {
361	+	System.err.println("Setting a permissive security manager");
362	+	Policy.setPolicy(permissivePolicy());
363	+	System.setSecurityManager(new SecurityManager());
364	+	}
365	+	for (int i = 0; i < suiteRuns; i++) {
366	+	TestResult result = newPithyTestRunner().doRun(suite);
367	+	if (!result.wasSuccessful())
368	+	System.exit(1);
369	+	System.gc();
370	+	System.runFinalization();
371	+	}
372	+	}
373	+
374	+	public static TestSuite newTestSuite(Object... suiteOrClasses) {
375	+	TestSuite suite = new TestSuite();
376	+	for (Object suiteOrClass : suiteOrClasses) {
377	+	if (suiteOrClass instanceof TestSuite)
378	+	suite.addTest((TestSuite) suiteOrClass);
379	+	else if (suiteOrClass instanceof Class)
380	+	suite.addTest(new TestSuite((Class<?>) suiteOrClass));
381	+	else
382	+	throw new ClassCastException("not a test suite or class");
383	+	}
384	+	return suite;
385	+	}
386	+
387	+	public static void addNamedTestClasses(TestSuite suite,
388	+	String... testClassNames) {
389	+	for (String testClassName : testClassNames) {
390	+	try {
391	+	Class<?> testClass = Class.forName(testClassName);
392	+	Method m = testClass.getDeclaredMethod("suite",
393	+	new Class<?>[0]);
394	+	suite.addTest(newTestSuite((Test)m.invoke(null)));
395	+	} catch (Exception e) {
396	+	throw new Error("Missing test class", e);
397	+	}
398	+	}
399	+	}
400	+
401	+	public static final double JAVA_CLASS_VERSION;
402	+	public static final String JAVA_SPECIFICATION_VERSION;
403	+	static {
404	+	try {
405	+	JAVA_CLASS_VERSION = java.security.AccessController.doPrivileged(
406	+	new java.security.PrivilegedAction<Double>() {
407	+	public Double run() {
408	+	return Double.valueOf(System.getProperty("java.class.version"));}});
409	+	JAVA_SPECIFICATION_VERSION = java.security.AccessController.doPrivileged(
410	+	new java.security.PrivilegedAction<String>() {
411	+	public String run() {
412	+	return System.getProperty("java.specification.version");}});
413	+	} catch (Throwable t) {
414	+	throw new Error(t);
415	+	}
416	+	}
417	+
418	+	public static boolean atLeastJava6() { return JAVA_CLASS_VERSION >= 50.0; }
419	+	public static boolean atLeastJava7() { return JAVA_CLASS_VERSION >= 51.0; }
420	+	public static boolean atLeastJava8() { return JAVA_CLASS_VERSION >= 52.0; }
421	+	public static boolean atLeastJava9() {
422	+	return JAVA_CLASS_VERSION >= 53.0
423	+	// As of 2015-09, java9 still uses 52.0 class file version
424	+	|| JAVA_SPECIFICATION_VERSION.matches("^(1\\.)?(9|[0-9][0-9])$");
425	+	}
426	+	public static boolean atLeastJava10() {
427	+	return JAVA_CLASS_VERSION >= 54.0
428	+	|| JAVA_SPECIFICATION_VERSION.matches("^(1\\.)?[0-9][0-9]$");
429	+	}
430	+
431	+	/**
432	+	* Collects all JSR166 unit tests as one suite.
433	+	*/
434	+	public static Test suite() {
435	+	// Java7+ test classes
436	+	TestSuite suite = newTestSuite(
437	+	ForkJoinPoolTest.suite(),
438	+	ForkJoinTaskTest.suite(),
439	+	RecursiveActionTest.suite(),
440	+	RecursiveTaskTest.suite(),
441	+	LinkedTransferQueueTest.suite(),
442	+	PhaserTest.suite(),
443	+	ThreadLocalRandomTest.suite(),
444	+	AbstractExecutorServiceTest.suite(),
445	+	AbstractQueueTest.suite(),
446	+	AbstractQueuedSynchronizerTest.suite(),
447	+	AbstractQueuedLongSynchronizerTest.suite(),
448	+	ArrayBlockingQueueTest.suite(),
449	+	ArrayDequeTest.suite(),
450	+	ArrayListTest.suite(),
451	+	AtomicBooleanTest.suite(),
452	+	AtomicIntegerArrayTest.suite(),
453	+	AtomicIntegerFieldUpdaterTest.suite(),
454	+	AtomicIntegerTest.suite(),
455	+	AtomicLongArrayTest.suite(),
456	+	AtomicLongFieldUpdaterTest.suite(),
457	+	AtomicLongTest.suite(),
458	+	AtomicMarkableReferenceTest.suite(),
459	+	AtomicReferenceArrayTest.suite(),
460	+	AtomicReferenceFieldUpdaterTest.suite(),
461	+	AtomicReferenceTest.suite(),
462	+	AtomicStampedReferenceTest.suite(),
463	+	ConcurrentHashMapTest.suite(),
464	+	ConcurrentLinkedDequeTest.suite(),
465	+	ConcurrentLinkedQueueTest.suite(),
466	+	ConcurrentSkipListMapTest.suite(),
467	+	ConcurrentSkipListSubMapTest.suite(),
468	+	ConcurrentSkipListSetTest.suite(),
469	+	ConcurrentSkipListSubSetTest.suite(),
470	+	CopyOnWriteArrayListTest.suite(),
471	+	CopyOnWriteArraySetTest.suite(),
472	+	CountDownLatchTest.suite(),
473	+	CountedCompleterTest.suite(),
474	+	CyclicBarrierTest.suite(),
475	+	DelayQueueTest.suite(),
476	+	EntryTest.suite(),
477	+	ExchangerTest.suite(),
478	+	ExecutorsTest.suite(),
479	+	ExecutorCompletionServiceTest.suite(),
480	+	FutureTaskTest.suite(),
481	+	LinkedBlockingDequeTest.suite(),
482	+	LinkedBlockingQueueTest.suite(),
483	+	LinkedListTest.suite(),
484	+	LockSupportTest.suite(),
485	+	PriorityBlockingQueueTest.suite(),
486	+	PriorityQueueTest.suite(),
487	+	ReentrantLockTest.suite(),
488	+	ReentrantReadWriteLockTest.suite(),
489	+	ScheduledExecutorTest.suite(),
490	+	ScheduledExecutorSubclassTest.suite(),
491	+	SemaphoreTest.suite(),
492	+	SynchronousQueueTest.suite(),
493	+	SystemTest.suite(),
494	+	ThreadLocalTest.suite(),
495	+	ThreadPoolExecutorTest.suite(),
496	+	ThreadPoolExecutorSubclassTest.suite(),
497	+	ThreadTest.suite(),
498	+	TimeUnitTest.suite(),
499	+	TreeMapTest.suite(),
500	+	TreeSetTest.suite(),
501	+	TreeSubMapTest.suite(),
502	+	TreeSubSetTest.suite());
503	+
504	+	// Java8+ test classes
505	+	if (atLeastJava8()) {
506	+	String[] java8TestClassNames = {
507	+	"ArrayDeque8Test",
508	+	"Atomic8Test",
509	+	"CompletableFutureTest",
510	+	"ConcurrentHashMap8Test",
511	+	"CountedCompleter8Test",
512	+	"DoubleAccumulatorTest",
513	+	"DoubleAdderTest",
514	+	"ForkJoinPool8Test",
515	+	"ForkJoinTask8Test",
516	+	"LongAccumulatorTest",
517	+	"LongAdderTest",
518	+	"SplittableRandomTest",
519	+	"StampedLockTest",
520	+	"SubmissionPublisherTest",
521	+	"ThreadLocalRandom8Test",
522	+	"TimeUnit8Test",
523	+	};
524	+	addNamedTestClasses(suite, java8TestClassNames);
525	+	}
526	+
527	+	// Java9+ test classes
528	+	if (atLeastJava9()) {
529	+	String[] java9TestClassNames = {
530	+	"AtomicBoolean9Test",
531	+	"AtomicInteger9Test",
532	+	"AtomicIntegerArray9Test",
533	+	"AtomicLong9Test",
534	+	"AtomicLongArray9Test",
535	+	"AtomicReference9Test",
536	+	"AtomicReferenceArray9Test",
537	+	"ExecutorCompletionService9Test",
538	+	};
539	+	addNamedTestClasses(suite, java9TestClassNames);
540	+	}
541	+
542	+	return suite;
543	+	}
544	+
545	+	/** Returns list of junit-style test method names in given class. */
546	+	public static ArrayList<String> testMethodNames(Class<?> testClass) {
547	+	Method[] methods = testClass.getDeclaredMethods();
548	+	ArrayList<String> names = new ArrayList<String>(methods.length);
549	+	for (Method method : methods) {
550	+	if (method.getName().startsWith("test")
551	+	&& Modifier.isPublic(method.getModifiers())
552	+	// method.getParameterCount() requires jdk8+
553	+	&& method.getParameterTypes().length == 0) {
554	+	names.add(method.getName());
555	+	}
556	+	}
557	+	return names;
558	+	}
559	+
560	+	/**
561	+	* Returns junit-style testSuite for the given test class, but
562	+	* parameterized by passing extra data to each test.
563	+	*/
564	+	public static <ExtraData> Test parameterizedTestSuite
565	+	(Class<? extends JSR166TestCase> testClass,
566	+	Class<ExtraData> dataClass,
567	+	ExtraData data) {
568	+	try {
569	+	TestSuite suite = new TestSuite();
570	+	Constructor c =
571	+	testClass.getDeclaredConstructor(dataClass, String.class);
572	+	for (String methodName : testMethodNames(testClass))
573	+	suite.addTest((Test) c.newInstance(data, methodName));
574	+	return suite;
575	+	} catch (Exception e) {
576	+	throw new Error(e);
577	+	}
578	+	}
579	+
580	+	/**
581	+	* Returns junit-style testSuite for the jdk8 extension of the
582	+	* given test class, but parameterized by passing extra data to
583	+	* each test.  Uses reflection to allow compilation in jdk7.
584	+	*/
585	+	public static <ExtraData> Test jdk8ParameterizedTestSuite
586	+	(Class<? extends JSR166TestCase> testClass,
587	+	Class<ExtraData> dataClass,
588	+	ExtraData data) {
589	+	if (atLeastJava8()) {
590	+	String name = testClass.getName();
591	+	String name8 = name.replaceAll("Test$", "8Test");
592	+	if (name.equals(name8)) throw new Error(name);
593	+	try {
594	+	return (Test)
595	+	Class.forName(name8)
596	+	.getMethod("testSuite", new Class[] { dataClass })
597	+	.invoke(null, data);
598	+	} catch (Exception e) {
599	+	throw new Error(e);
600	+	}
601	+	} else {
602	+	return new TestSuite();
603	+	}
604	+	}
605	+
606	+	// Delays for timing-dependent tests, in milliseconds.
607	+
608	+	public static long SHORT_DELAY_MS;
609	+	public static long SMALL_DELAY_MS;
610	+	public static long MEDIUM_DELAY_MS;
611	+	public static long LONG_DELAY_MS;
612	+
613	+	/**
614	+	* Returns the shortest timed delay. This can be scaled up for
615	+	* slow machines using the jsr166.delay.factor system property,
616	+	* or via jtreg's -timeoutFactor: flag.
617	+	* http://openjdk.java.net/jtreg/command-help.html
618	+	*/
619	+	protected long getShortDelay() {
620	+	return (long) (50 * delayFactor);
621	+	}
622	+
623	+	/**
624	+	* Sets delays as multiples of SHORT_DELAY.
625	+	*/
626	+	protected void setDelays() {
627	+	SHORT_DELAY_MS = getShortDelay();
628	+	SMALL_DELAY_MS  = SHORT_DELAY_MS * 5;
629	+	MEDIUM_DELAY_MS = SHORT_DELAY_MS * 10;
630	+	LONG_DELAY_MS   = SHORT_DELAY_MS * 200;
631	+	}
632	+
633	+	/**
634	+	* Returns a timeout in milliseconds to be used in tests that
635	+	* verify that operations block or time out.
636	+	*/
637	+	long timeoutMillis() {
638	+	return SHORT_DELAY_MS / 4;
639	+	}
640	+
641	+	/**
642	+	* Returns a new Date instance representing a time at least
643	+	* delayMillis milliseconds in the future.
644	+	*/
645	+	Date delayedDate(long delayMillis) {
646	+	// Add 1 because currentTimeMillis is known to round into the past.
647	+	return new Date(System.currentTimeMillis() + delayMillis + 1);
648	+	}
649
650		/**
651	<	* Flag set true if any threadAssert methods fail
651	>	* The first exception encountered if any threadAssertXXX method fails.
652		*/
653	<	protected volatile boolean threadFailed;
653	>	private final AtomicReference<Throwable> threadFailure
654	>	= new AtomicReference<Throwable>(null);
655
656		/**
657	<	* Initialize test to indicat that no thread assertions have failed
657	>	* Records an exception so that it can be rethrown later in the test
658	>	* harness thread, triggering a test case failure.  Only the first
659	>	* failure is recorded; subsequent calls to this method from within
660	>	* the same test have no effect.
661		*/
662	<	public void setUp() {
663	<	threadFailed = false;
662	>	public void threadRecordFailure(Throwable t) {
663	>	System.err.println(t);
664	>	dumpTestThreads();
665	>	threadFailure.compareAndSet(null, t);
666	>	}
667	>
668	>	public void setUp() {
669	>	setDelays();
670	>	}
671	>
672	>	void tearDownFail(String format, Object... args) {
673	>	String msg = toString() + ": " + String.format(format, args);
674	>	System.err.println(msg);
675	>	dumpTestThreads();
676	>	throw new AssertionFailedError(msg);
677		}
678
679		/**
680	<	* Trigger test case failure if any thread assertions have failed
680	>	* Extra checks that get done for all test cases.
681	>	*
682	>	* Triggers test case failure if any thread assertions have failed,
683	>	* by rethrowing, in the test harness thread, any exception recorded
684	>	* earlier by threadRecordFailure.
685	>	*
686	>	* Triggers test case failure if interrupt status is set in the main thread.
687		*/
688	<	public void tearDown() {
689	<	assertFalse(threadFailed);
688	>	public void tearDown() throws Exception {
689	>	Throwable t = threadFailure.getAndSet(null);
690	>	if (t != null) {
691	>	if (t instanceof Error)
692	>	throw (Error) t;
693	>	else if (t instanceof RuntimeException)
694	>	throw (RuntimeException) t;
695	>	else if (t instanceof Exception)
696	>	throw (Exception) t;
697	>	else {
698	>	AssertionFailedError afe =
699	>	new AssertionFailedError(t.toString());
700	>	afe.initCause(t);
701	>	throw afe;
702	>	}
703	>	}
704	>
705	>	if (Thread.interrupted())
706	>	tearDownFail("interrupt status set in main thread");
707	>
708	>	checkForkJoinPoolThreadLeaks();
709		}
710
711	+	/**
712	+	* Finds missing PoolCleaners
713	+	*/
714	+	void checkForkJoinPoolThreadLeaks() throws InterruptedException {
715	+	Thread[] survivors = new Thread[7];
716	+	int count = Thread.enumerate(survivors);
717	+	for (int i = 0; i < count; i++) {
718	+	Thread thread = survivors[i];
719	+	String name = thread.getName();
720	+	if (name.startsWith("ForkJoinPool-")) {
721	+	// give thread some time to terminate
722	+	thread.join(LONG_DELAY_MS);
723	+	if (thread.isAlive())
724	+	tearDownFail("Found leaked ForkJoinPool thread thread=%s",
725	+	thread);
726	+	}
727	+	}
728	+
729	+	if (!ForkJoinPool.commonPool()
730	+	.awaitQuiescence(LONG_DELAY_MS, MILLISECONDS))
731	+	tearDownFail("ForkJoin common pool thread stuck");
732	+	}
733	+
734	+	/**
735	+	* Just like fail(reason), but additionally recording (using
736	+	* threadRecordFailure) any AssertionFailedError thrown, so that
737	+	* the current testcase will fail.
738	+	*/
739		public void threadFail(String reason) {
740	<	threadFailed = true;
741	<	fail(reason);
740	>	try {
741	>	fail(reason);
742	>	} catch (AssertionFailedError t) {
743	>	threadRecordFailure(t);
744	>	throw t;
745	>	}
746		}
747
748	+	/**
749	+	* Just like assertTrue(b), but additionally recording (using
750	+	* threadRecordFailure) any AssertionFailedError thrown, so that
751	+	* the current testcase will fail.
752	+	*/
753		public void threadAssertTrue(boolean b) {
754	<	if (!b) {
83	<	threadFailed = true;
754	>	try {
755		assertTrue(b);
756	+	} catch (AssertionFailedError t) {
757	+	threadRecordFailure(t);
758	+	throw t;
759		}
760		}
761	+
762	+	/**
763	+	* Just like assertFalse(b), but additionally recording (using
764	+	* threadRecordFailure) any AssertionFailedError thrown, so that
765	+	* the current testcase will fail.
766	+	*/
767		public void threadAssertFalse(boolean b) {
768	<	if (b) {
89	<	threadFailed = true;
768	>	try {
769		assertFalse(b);
770	+	} catch (AssertionFailedError t) {
771	+	threadRecordFailure(t);
772	+	throw t;
773		}
774		}
775	+
776	+	/**
777	+	* Just like assertNull(x), but additionally recording (using
778	+	* threadRecordFailure) any AssertionFailedError thrown, so that
779	+	* the current testcase will fail.
780	+	*/
781		public void threadAssertNull(Object x) {
782	<	if (x != null) {
95	<	threadFailed = true;
782	>	try {
783		assertNull(x);
784	+	} catch (AssertionFailedError t) {
785	+	threadRecordFailure(t);
786	+	throw t;
787		}
788		}
789	+
790	+	/**
791	+	* Just like assertEquals(x, y), but additionally recording (using
792	+	* threadRecordFailure) any AssertionFailedError thrown, so that
793	+	* the current testcase will fail.
794	+	*/
795		public void threadAssertEquals(long x, long y) {
796	<	if (x != y) {
101	<	threadFailed = true;
796	>	try {
797		assertEquals(x, y);
798	+	} catch (AssertionFailedError t) {
799	+	threadRecordFailure(t);
800	+	throw t;
801		}
802		}
803	+
804	+	/**
805	+	* Just like assertEquals(x, y), but additionally recording (using
806	+	* threadRecordFailure) any AssertionFailedError thrown, so that
807	+	* the current testcase will fail.
808	+	*/
809		public void threadAssertEquals(Object x, Object y) {
810	<	if (x != y && (x == null || !x.equals(y))) {
107	<	threadFailed = true;
810	>	try {
811		assertEquals(x, y);
812	+	} catch (AssertionFailedError fail) {
813	+	threadRecordFailure(fail);
814	+	throw fail;
815	+	} catch (Throwable fail) {
816	+	threadUnexpectedException(fail);
817		}
818		}
819
820		/**
821	<	* Wait out termination of a thread pool or fail doing so
821	>	* Just like assertSame(x, y), but additionally recording (using
822	>	* threadRecordFailure) any AssertionFailedError thrown, so that
823	>	* the current testcase will fail.
824		*/
825	<	public void joinPool(ExecutorService exec) {
825	>	public void threadAssertSame(Object x, Object y) {
826		try {
827	<	exec.shutdown();
828	<	assertTrue(exec.awaitTermination(LONG_DELAY_MS, TimeUnit.MILLISECONDS));
829	<	} catch(InterruptedException ie) {
830	<	fail("unexpected exception");
827	>	assertSame(x, y);
828	>	} catch (AssertionFailedError fail) {
829	>	threadRecordFailure(fail);
830	>	throw fail;
831	>	}
832	>	}
833	>
834	>	/**
835	>	* Calls threadFail with message "should throw exception".
836	>	*/
837	>	public void threadShouldThrow() {
838	>	threadFail("should throw exception");
839	>	}
840	>
841	>	/**
842	>	* Calls threadFail with message "should throw" + exceptionName.
843	>	*/
844	>	public void threadShouldThrow(String exceptionName) {
845	>	threadFail("should throw " + exceptionName);
846	>	}
847	>
848	>	/**
849	>	* Records the given exception using {@link #threadRecordFailure},
850	>	* then rethrows the exception, wrapping it in an
851	>	* AssertionFailedError if necessary.
852	>	*/
853	>	public void threadUnexpectedException(Throwable t) {
854	>	threadRecordFailure(t);
855	>	t.printStackTrace();
856	>	if (t instanceof RuntimeException)
857	>	throw (RuntimeException) t;
858	>	else if (t instanceof Error)
859	>	throw (Error) t;
860	>	else {
861	>	AssertionFailedError afe =
862	>	new AssertionFailedError("unexpected exception: " + t);
863	>	afe.initCause(t);
864	>	throw afe;
865	>	}
866	>	}
867	>
868	>	/**
869	>	* Delays, via Thread.sleep, for the given millisecond delay, but
870	>	* if the sleep is shorter than specified, may re-sleep or yield
871	>	* until time elapses.  Ensures that the given time, as measured
872	>	* by System.nanoTime(), has elapsed.
873	>	*/
874	>	static void delay(long millis) throws InterruptedException {
875	>	long nanos = millis * (1000 * 1000);
876	>	final long wakeupTime = System.nanoTime() + nanos;
877	>	do {
878	>	if (millis > 0L)
879	>	Thread.sleep(millis);
880	>	else // too short to sleep
881	>	Thread.yield();
882	>	nanos = wakeupTime - System.nanoTime();
883	>	millis = nanos / (1000 * 1000);
884	>	} while (nanos >= 0L);
885	>	}
886	>
887	>	/**
888	>	* Allows use of try-with-resources with per-test thread pools.
889	>	*/
890	>	class PoolCleaner implements AutoCloseable {
891	>	private final ExecutorService pool;
892	>	public PoolCleaner(ExecutorService pool) { this.pool = pool; }
893	>	public void close() { joinPool(pool); }
894	>	}
895	>
896	>	/**
897	>	* An extension of PoolCleaner that has an action to release the pool.
898	>	*/
899	>	class PoolCleanerWithReleaser extends PoolCleaner {
900	>	private final Runnable releaser;
901	>	public PoolCleanerWithReleaser(ExecutorService pool, Runnable releaser) {
902	>	super(pool);
903	>	this.releaser = releaser;
904		}
905	+	public void close() {
906	+	try {
907	+	releaser.run();
908	+	} finally {
909	+	super.close();
910	+	}
911	+	}
912	+	}
913	+
914	+	PoolCleaner cleaner(ExecutorService pool) {
915	+	return new PoolCleaner(pool);
916	+	}
917	+
918	+	PoolCleaner cleaner(ExecutorService pool, Runnable releaser) {
919	+	return new PoolCleanerWithReleaser(pool, releaser);
920	+	}
921	+
922	+	PoolCleaner cleaner(ExecutorService pool, CountDownLatch latch) {
923	+	return new PoolCleanerWithReleaser(pool, releaser(latch));
924	+	}
925	+
926	+	Runnable releaser(final CountDownLatch latch) {
927	+	return new Runnable() { public void run() {
928	+	do { latch.countDown(); }
929	+	while (latch.getCount() > 0);
930	+	}};
931	+	}
932	+
933	+	PoolCleaner cleaner(ExecutorService pool, AtomicBoolean flag) {
934	+	return new PoolCleanerWithReleaser(pool, releaser(flag));
935	+	}
936	+
937	+	Runnable releaser(final AtomicBoolean flag) {
938	+	return new Runnable() { public void run() { flag.set(true); }};
939	+	}
940	+
941	+	/**
942	+	* Waits out termination of a thread pool or fails doing so.
943	+	*/
944	+	void joinPool(ExecutorService pool) {
945	+	try {
946	+	pool.shutdown();
947	+	if (!pool.awaitTermination(2 * LONG_DELAY_MS, MILLISECONDS)) {
948	+	try {
949	+	threadFail("ExecutorService " + pool +
950	+	" did not terminate in a timely manner");
951	+	} finally {
952	+	// last resort, for the benefit of subsequent tests
953	+	pool.shutdownNow();
954	+	pool.awaitTermination(MEDIUM_DELAY_MS, MILLISECONDS);
955	+	}
956	+	}
957	+	} catch (SecurityException ok) {
958	+	// Allowed in case test doesn't have privs
959	+	} catch (InterruptedException fail) {
960	+	threadFail("Unexpected InterruptedException");
961	+	}
962	+	}
963	+
964	+	/**
965	+	* Like Runnable, but with the freedom to throw anything.
966	+	* junit folks had the same idea:
967	+	* http://junit.org/junit5/docs/snapshot/api/org/junit/gen5/api/Executable.html
968	+	*/
969	+	interface Action { public void run() throws Throwable; }
970	+
971	+	/**
972	+	* Runs all the given actions in parallel, failing if any fail.
973	+	* Useful for running multiple variants of tests that are
974	+	* necessarily individually slow because they must block.
975	+	*/
976	+	void testInParallel(Action ... actions) {
977	+	ExecutorService pool = Executors.newCachedThreadPool();
978	+	try (PoolCleaner cleaner = cleaner(pool)) {
979	+	ArrayList<Future<?>> futures = new ArrayList<>(actions.length);
980	+	for (final Action action : actions)
981	+	futures.add(pool.submit(new CheckedRunnable() {
982	+	public void realRun() throws Throwable { action.run();}}));
983	+	for (Future<?> future : futures)
984	+	try {
985	+	assertNull(future.get(LONG_DELAY_MS, MILLISECONDS));
986	+	} catch (ExecutionException ex) {
987	+	threadUnexpectedException(ex.getCause());
988	+	} catch (Exception ex) {
989	+	threadUnexpectedException(ex);
990	+	}
991	+	}
992	+	}
993	+
994	+	/**
995	+	* A debugging tool to print stack traces of most threads, as jstack does.
996	+	* Uninteresting threads are filtered out.
997	+	*/
998	+	static void dumpTestThreads() {
999	+	SecurityManager sm = System.getSecurityManager();
1000	+	if (sm != null) {
1001	+	try {
1002	+	System.setSecurityManager(null);
1003	+	} catch (SecurityException giveUp) {
1004	+	return;
1005	+	}
1006	+	}
1007	+
1008	+	ThreadMXBean threadMXBean = ManagementFactory.getThreadMXBean();
1009	+	System.err.println("------ stacktrace dump start ------");
1010	+	for (ThreadInfo info : threadMXBean.dumpAllThreads(true, true)) {
1011	+	final String name = info.getThreadName();
1012	+	String lockName;
1013	+	if ("Signal Dispatcher".equals(name))
1014	+	continue;
1015	+	if ("Reference Handler".equals(name)
1016	+	&& (lockName = info.getLockName()) != null
1017	+	&& lockName.startsWith("java.lang.ref.Reference$Lock"))
1018	+	continue;
1019	+	if ("Finalizer".equals(name)
1020	+	&& (lockName = info.getLockName()) != null
1021	+	&& lockName.startsWith("java.lang.ref.ReferenceQueue$Lock"))
1022	+	continue;
1023	+	if ("checkForWedgedTest".equals(name))
1024	+	continue;
1025	+	System.err.print(info);
1026	+	}
1027	+	System.err.println("------ stacktrace dump end ------");
1028	+
1029	+	if (sm != null) System.setSecurityManager(sm);
1030	+	}
1031	+
1032	+	/**
1033	+	* Checks that thread does not terminate within the default
1034	+	* millisecond delay of {@code timeoutMillis()}.
1035	+	*/
1036	+	void assertThreadStaysAlive(Thread thread) {
1037	+	assertThreadStaysAlive(thread, timeoutMillis());
1038	+	}
1039	+
1040	+	/**
1041	+	* Checks that thread does not terminate within the given millisecond delay.
1042	+	*/
1043	+	void assertThreadStaysAlive(Thread thread, long millis) {
1044	+	try {
1045	+	// No need to optimize the failing case via Thread.join.
1046	+	delay(millis);
1047	+	assertTrue(thread.isAlive());
1048	+	} catch (InterruptedException fail) {
1049	+	threadFail("Unexpected InterruptedException");
1050	+	}
1051	+	}
1052	+
1053	+	/**
1054	+	* Checks that the threads do not terminate within the default
1055	+	* millisecond delay of {@code timeoutMillis()}.
1056	+	*/
1057	+	void assertThreadsStayAlive(Thread... threads) {
1058	+	assertThreadsStayAlive(timeoutMillis(), threads);
1059	+	}
1060	+
1061	+	/**
1062	+	* Checks that the threads do not terminate within the given millisecond delay.
1063	+	*/
1064	+	void assertThreadsStayAlive(long millis, Thread... threads) {
1065	+	try {
1066	+	// No need to optimize the failing case via Thread.join.
1067	+	delay(millis);
1068	+	for (Thread thread : threads)
1069	+	assertTrue(thread.isAlive());
1070	+	} catch (InterruptedException fail) {
1071	+	threadFail("Unexpected InterruptedException");
1072	+	}
1073	+	}
1074	+
1075	+	/**
1076	+	* Checks that future.get times out, with the default timeout of
1077	+	* {@code timeoutMillis()}.
1078	+	*/
1079	+	void assertFutureTimesOut(Future future) {
1080	+	assertFutureTimesOut(future, timeoutMillis());
1081		}
1082
1083	<	public static final long SHORT_DELAY_MS =   100;
1084	<	public static final long SMALL_DELAY_MS =   500;
1085	<	public static final long MEDIUM_DELAY_MS = 1000;
1086	<	public static final long LONG_DELAY_MS =   5000;
1083	>	/**
1084	>	* Checks that future.get times out, with the given millisecond timeout.
1085	>	*/
1086	>	void assertFutureTimesOut(Future future, long timeoutMillis) {
1087	>	long startTime = System.nanoTime();
1088	>	try {
1089	>	future.get(timeoutMillis, MILLISECONDS);
1090	>	shouldThrow();
1091	>	} catch (TimeoutException success) {
1092	>	} catch (Exception fail) {
1093	>	threadUnexpectedException(fail);
1094	>	} finally { future.cancel(true); }
1095	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
1096	>	}
1097
1098	+	/**
1099	+	* Fails with message "should throw exception".
1100	+	*/
1101	+	public void shouldThrow() {
1102	+	fail("Should throw exception");
1103	+	}
1104	+
1105	+	/**
1106	+	* Fails with message "should throw " + exceptionName.
1107	+	*/
1108	+	public void shouldThrow(String exceptionName) {
1109	+	fail("Should throw " + exceptionName);
1110	+	}
1111
1112		/**
1113		* The number of elements to place in collections, arrays, etc.
#	Line 134 | Line 1116 | public class JSR166TestCase extends Test
1116
1117		// Some convenient Integer constants
1118
1119	<	public static final Integer zero = new Integer(0);
1120	<	public static final Integer one = new Integer(1);
1121	<	public static final Integer two = new Integer(2);
1122	<	public static final Integer three  = new Integer(3);
1119	>	public static final Integer zero  = new Integer(0);
1120	>	public static final Integer one   = new Integer(1);
1121	>	public static final Integer two   = new Integer(2);
1122	>	public static final Integer three = new Integer(3);
1123		public static final Integer four  = new Integer(4);
1124		public static final Integer five  = new Integer(5);
1125	<	public static final Integer six = new Integer(6);
1125	>	public static final Integer six   = new Integer(6);
1126		public static final Integer seven = new Integer(7);
1127		public static final Integer eight = new Integer(8);
1128	<	public static final Integer nine = new Integer(9);
1128	>	public static final Integer nine  = new Integer(9);
1129		public static final Integer m1  = new Integer(-1);
1130		public static final Integer m2  = new Integer(-2);
1131		public static final Integer m3  = new Integer(-3);
1132	<	public static final Integer m4 = new Integer(-4);
1133	<	public static final Integer m5 = new Integer(-5);
1132	>	public static final Integer m4  = new Integer(-4);
1133	>	public static final Integer m5  = new Integer(-5);
1134	>	public static final Integer m6  = new Integer(-6);
1135		public static final Integer m10 = new Integer(-10);
1136
1137	+	/**
1138	+	* Runs Runnable r with a security policy that permits precisely
1139	+	* the specified permissions.  If there is no current security
1140	+	* manager, the runnable is run twice, both with and without a
1141	+	* security manager.  We require that any security manager permit
1142	+	* getPolicy/setPolicy.
1143	+	*/
1144	+	public void runWithPermissions(Runnable r, Permission... permissions) {
1145	+	SecurityManager sm = System.getSecurityManager();
1146	+	if (sm == null) {
1147	+	r.run();
1148	+	}
1149	+	runWithSecurityManagerWithPermissions(r, permissions);
1150	+	}
1151
1152	<	// Some convenient Runnable classes
1152	>	/**
1153	>	* Runs Runnable r with a security policy that permits precisely
1154	>	* the specified permissions.  If there is no current security
1155	>	* manager, a temporary one is set for the duration of the
1156	>	* Runnable.  We require that any security manager permit
1157	>	* getPolicy/setPolicy.
1158	>	*/
1159	>	public void runWithSecurityManagerWithPermissions(Runnable r,
1160	>	Permission... permissions) {
1161	>	SecurityManager sm = System.getSecurityManager();
1162	>	if (sm == null) {
1163	>	Policy savedPolicy = Policy.getPolicy();
1164	>	try {
1165	>	Policy.setPolicy(permissivePolicy());
1166	>	System.setSecurityManager(new SecurityManager());
1167	>	runWithSecurityManagerWithPermissions(r, permissions);
1168	>	} finally {
1169	>	System.setSecurityManager(null);
1170	>	Policy.setPolicy(savedPolicy);
1171	>	}
1172	>	} else {
1173	>	Policy savedPolicy = Policy.getPolicy();
1174	>	AdjustablePolicy policy = new AdjustablePolicy(permissions);
1175	>	Policy.setPolicy(policy);
1176
1177	<	public static class NoOpRunnable implements Runnable {
1178	<	public void run() {}
1177	>	try {
1178	>	r.run();
1179	>	} finally {
1180	>	policy.addPermission(new SecurityPermission("setPolicy"));
1181	>	Policy.setPolicy(savedPolicy);
1182	>	}
1183	>	}
1184		}
1185
1186	<	public static class NoOpCallable implements Callable {
1187	<	public Object call() { return Boolean.TRUE; }
1186	>	/**
1187	>	* Runs a runnable without any permissions.
1188	>	*/
1189	>	public void runWithoutPermissions(Runnable r) {
1190	>	runWithPermissions(r);
1191		}
1192
1193	<	public class ShortRunnable implements Runnable {
1194	<	public void run() {
1195	<	try {
1196	<	Thread.sleep(SHORT_DELAY_MS);
1193	>	/**
1194	>	* A security policy where new permissions can be dynamically added
1195	>	* or all cleared.
1196	>	*/
1197	>	public static class AdjustablePolicy extends java.security.Policy {
1198	>	Permissions perms = new Permissions();
1199	>	AdjustablePolicy(Permission... permissions) {
1200	>	for (Permission permission : permissions)
1201	>	perms.add(permission);
1202	>	}
1203	>	void addPermission(Permission perm) { perms.add(perm); }
1204	>	void clearPermissions() { perms = new Permissions(); }
1205	>	public PermissionCollection getPermissions(CodeSource cs) {
1206	>	return perms;
1207	>	}
1208	>	public PermissionCollection getPermissions(ProtectionDomain pd) {
1209	>	return perms;
1210	>	}
1211	>	public boolean implies(ProtectionDomain pd, Permission p) {
1212	>	return perms.implies(p);
1213	>	}
1214	>	public void refresh() {}
1215	>	public String toString() {
1216	>	List<Permission> ps = new ArrayList<Permission>();
1217	>	for (Enumeration<Permission> e = perms.elements(); e.hasMoreElements();)
1218	>	ps.add(e.nextElement());
1219	>	return "AdjustablePolicy with permissions " + ps;
1220	>	}
1221	>	}
1222	>
1223	>	/**
1224	>	* Returns a policy containing all the permissions we ever need.
1225	>	*/
1226	>	public static Policy permissivePolicy() {
1227	>	return new AdjustablePolicy
1228	>	// Permissions j.u.c. needs directly
1229	>	(new RuntimePermission("modifyThread"),
1230	>	new RuntimePermission("getClassLoader"),
1231	>	new RuntimePermission("setContextClassLoader"),
1232	>	// Permissions needed to change permissions!
1233	>	new SecurityPermission("getPolicy"),
1234	>	new SecurityPermission("setPolicy"),
1235	>	new RuntimePermission("setSecurityManager"),
1236	>	// Permissions needed by the junit test harness
1237	>	new RuntimePermission("accessDeclaredMembers"),
1238	>	new PropertyPermission("*", "read"),
1239	>	new java.io.FilePermission("<<ALL FILES>>", "read"));
1240	>	}
1241	>
1242	>	/**
1243	>	* Sleeps until the given time has elapsed.
1244	>	* Throws AssertionFailedError if interrupted.
1245	>	*/
1246	>	static void sleep(long millis) {
1247	>	try {
1248	>	delay(millis);
1249	>	} catch (InterruptedException fail) {
1250	>	AssertionFailedError afe =
1251	>	new AssertionFailedError("Unexpected InterruptedException");
1252	>	afe.initCause(fail);
1253	>	throw afe;
1254	>	}
1255	>	}
1256	>
1257	>	/**
1258	>	* Spin-waits up to the specified number of milliseconds for the given
1259	>	* thread to enter a wait state: BLOCKED, WAITING, or TIMED_WAITING.
1260	>	*/
1261	>	void waitForThreadToEnterWaitState(Thread thread, long timeoutMillis) {
1262	>	long startTime = 0L;
1263	>	for (;;) {
1264	>	Thread.State s = thread.getState();
1265	>	if (s == Thread.State.BLOCKED ||
1266	>	s == Thread.State.WAITING ||
1267	>	s == Thread.State.TIMED_WAITING)
1268	>	return;
1269	>	else if (s == Thread.State.TERMINATED)
1270	>	fail("Unexpected thread termination");
1271	>	else if (startTime == 0L)
1272	>	startTime = System.nanoTime();
1273	>	else if (millisElapsedSince(startTime) > timeoutMillis) {
1274	>	threadAssertTrue(thread.isAlive());
1275	>	return;
1276		}
1277	<	catch(Exception e) {
1278	<	threadFail("unexpectedException");
1277	>	Thread.yield();
1278	>	}
1279	>	}
1280	>
1281	>	/**
1282	>	* Waits up to LONG_DELAY_MS for the given thread to enter a wait
1283	>	* state: BLOCKED, WAITING, or TIMED_WAITING.
1284	>	*/
1285	>	void waitForThreadToEnterWaitState(Thread thread) {
1286	>	waitForThreadToEnterWaitState(thread, LONG_DELAY_MS);
1287	>	}
1288	>
1289	>	/**
1290	>	* Returns the number of milliseconds since time given by
1291	>	* startNanoTime, which must have been previously returned from a
1292	>	* call to {@link System#nanoTime()}.
1293	>	*/
1294	>	static long millisElapsedSince(long startNanoTime) {
1295	>	return NANOSECONDS.toMillis(System.nanoTime() - startNanoTime);
1296	>	}
1297	>
1298	>	//     void assertTerminatesPromptly(long timeoutMillis, Runnable r) {
1299	>	//         long startTime = System.nanoTime();
1300	>	//         try {
1301	>	//             r.run();
1302	>	//         } catch (Throwable fail) { threadUnexpectedException(fail); }
1303	>	//         if (millisElapsedSince(startTime) > timeoutMillis/2)
1304	>	//             throw new AssertionFailedError("did not return promptly");
1305	>	//     }
1306	>
1307	>	//     void assertTerminatesPromptly(Runnable r) {
1308	>	//         assertTerminatesPromptly(LONG_DELAY_MS/2, r);
1309	>	//     }
1310	>
1311	>	/**
1312	>	* Checks that timed f.get() returns the expected value, and does not
1313	>	* wait for the timeout to elapse before returning.
1314	>	*/
1315	>	<T> void checkTimedGet(Future<T> f, T expectedValue, long timeoutMillis) {
1316	>	long startTime = System.nanoTime();
1317	>	try {
1318	>	assertEquals(expectedValue, f.get(timeoutMillis, MILLISECONDS));
1319	>	} catch (Throwable fail) { threadUnexpectedException(fail); }
1320	>	if (millisElapsedSince(startTime) > timeoutMillis/2)
1321	>	throw new AssertionFailedError("timed get did not return promptly");
1322	>	}
1323	>
1324	>	<T> void checkTimedGet(Future<T> f, T expectedValue) {
1325	>	checkTimedGet(f, expectedValue, LONG_DELAY_MS);
1326	>	}
1327	>
1328	>	/**
1329	>	* Returns a new started daemon Thread running the given runnable.
1330	>	*/
1331	>	Thread newStartedThread(Runnable runnable) {
1332	>	Thread t = new Thread(runnable);
1333	>	t.setDaemon(true);
1334	>	t.start();
1335	>	return t;
1336	>	}
1337	>
1338	>	/**
1339	>	* Waits for the specified time (in milliseconds) for the thread
1340	>	* to terminate (using {@link Thread#join(long)}), else interrupts
1341	>	* the thread (in the hope that it may terminate later) and fails.
1342	>	*/
1343	>	void awaitTermination(Thread t, long timeoutMillis) {
1344	>	try {
1345	>	t.join(timeoutMillis);
1346	>	} catch (InterruptedException fail) {
1347	>	threadUnexpectedException(fail);
1348	>	} finally {
1349	>	if (t.getState() != Thread.State.TERMINATED) {
1350	>	t.interrupt();
1351	>	threadFail("timed out waiting for thread to terminate");
1352		}
1353		}
1354		}
1355
1356	<	public class ShortInterruptedRunnable implements Runnable {
1357	<	public void run() {
1356	>	/**
1357	>	* Waits for LONG_DELAY_MS milliseconds for the thread to
1358	>	* terminate (using {@link Thread#join(long)}), else interrupts
1359	>	* the thread (in the hope that it may terminate later) and fails.
1360	>	*/
1361	>	void awaitTermination(Thread t) {
1362	>	awaitTermination(t, LONG_DELAY_MS);
1363	>	}
1364	>
1365	>	// Some convenient Runnable classes
1366	>
1367	>	public abstract class CheckedRunnable implements Runnable {
1368	>	protected abstract void realRun() throws Throwable;
1369	>
1370	>	public final void run() {
1371		try {
1372	<	Thread.sleep(SHORT_DELAY_MS);
1373	<	threadFail("should throw IE");
1372	>	realRun();
1373	>	} catch (Throwable fail) {
1374	>	threadUnexpectedException(fail);
1375		}
1376	<	catch(InterruptedException success) {
1376	>	}
1377	>	}
1378	>
1379	>	public abstract class RunnableShouldThrow implements Runnable {
1380	>	protected abstract void realRun() throws Throwable;
1381	>
1382	>	final Class<?> exceptionClass;
1383	>
1384	>	<T extends Throwable> RunnableShouldThrow(Class<T> exceptionClass) {
1385	>	this.exceptionClass = exceptionClass;
1386	>	}
1387	>
1388	>	public final void run() {
1389	>	try {
1390	>	realRun();
1391	>	threadShouldThrow(exceptionClass.getSimpleName());
1392	>	} catch (Throwable t) {
1393	>	if (! exceptionClass.isInstance(t))
1394	>	threadUnexpectedException(t);
1395		}
1396		}
1397		}
1398
1399	<	public class SmallRunnable implements Runnable {
1400	<	public void run() {
1399	>	public abstract class ThreadShouldThrow extends Thread {
1400	>	protected abstract void realRun() throws Throwable;
1401	>
1402	>	final Class<?> exceptionClass;
1403	>
1404	>	<T extends Throwable> ThreadShouldThrow(Class<T> exceptionClass) {
1405	>	this.exceptionClass = exceptionClass;
1406	>	}
1407	>
1408	>	public final void run() {
1409		try {
1410	<	Thread.sleep(SMALL_DELAY_MS);
1410	>	realRun();
1411	>	threadShouldThrow(exceptionClass.getSimpleName());
1412	>	} catch (Throwable t) {
1413	>	if (! exceptionClass.isInstance(t))
1414	>	threadUnexpectedException(t);
1415		}
1416	<	catch(Exception e) {
1417	<	threadFail("unexpectedException");
1416	>	}
1417	>	}
1418	>
1419	>	public abstract class CheckedInterruptedRunnable implements Runnable {
1420	>	protected abstract void realRun() throws Throwable;
1421	>
1422	>	public final void run() {
1423	>	try {
1424	>	realRun();
1425	>	threadShouldThrow("InterruptedException");
1426	>	} catch (InterruptedException success) {
1427	>	threadAssertFalse(Thread.interrupted());
1428	>	} catch (Throwable fail) {
1429	>	threadUnexpectedException(fail);
1430		}
1431		}
1432		}
1433
1434	<	public class SmallCallable implements Callable {
1435	<	public Object call() {
1434	>	public abstract class CheckedCallable<T> implements Callable<T> {
1435	>	protected abstract T realCall() throws Throwable;
1436	>
1437	>	public final T call() {
1438		try {
1439	<	Thread.sleep(SMALL_DELAY_MS);
1439	>	return realCall();
1440	>	} catch (Throwable fail) {
1441	>	threadUnexpectedException(fail);
1442	>	return null;
1443		}
1444	<	catch(Exception e) {
1445	<	threadFail("unexpectedException");
1444	>	}
1445	>	}
1446	>
1447	>	public abstract class CheckedInterruptedCallable<T>
1448	>	implements Callable<T> {
1449	>	protected abstract T realCall() throws Throwable;
1450	>
1451	>	public final T call() {
1452	>	try {
1453	>	T result = realCall();
1454	>	threadShouldThrow("InterruptedException");
1455	>	return result;
1456	>	} catch (InterruptedException success) {
1457	>	threadAssertFalse(Thread.interrupted());
1458	>	} catch (Throwable fail) {
1459	>	threadUnexpectedException(fail);
1460		}
1461	+	return null;
1462	+	}
1463	+	}
1464	+
1465	+	public static class NoOpRunnable implements Runnable {
1466	+	public void run() {}
1467	+	}
1468	+
1469	+	public static class NoOpCallable implements Callable {
1470	+	public Object call() { return Boolean.TRUE; }
1471	+	}
1472	+
1473	+	public static final String TEST_STRING = "a test string";
1474	+
1475	+	public static class StringTask implements Callable<String> {
1476	+	final String value;
1477	+	public StringTask() { this(TEST_STRING); }
1478	+	public StringTask(String value) { this.value = value; }
1479	+	public String call() { return value; }
1480	+	}
1481	+
1482	+	public Callable<String> latchAwaitingStringTask(final CountDownLatch latch) {
1483	+	return new CheckedCallable<String>() {
1484	+	protected String realCall() {
1485	+	try {
1486	+	latch.await();
1487	+	} catch (InterruptedException quittingTime) {}
1488	+	return TEST_STRING;
1489	+	}};
1490	+	}
1491	+
1492	+	public Runnable countDowner(final CountDownLatch latch) {
1493	+	return new CheckedRunnable() {
1494	+	public void realRun() throws InterruptedException {
1495	+	latch.countDown();
1496	+	}};
1497	+	}
1498	+
1499	+	class LatchAwaiter extends CheckedRunnable {
1500	+	static final int NEW = 0;
1501	+	static final int RUNNING = 1;
1502	+	static final int DONE = 2;
1503	+	final CountDownLatch latch;
1504	+	int state = NEW;
1505	+	LatchAwaiter(CountDownLatch latch) { this.latch = latch; }
1506	+	public void realRun() throws InterruptedException {
1507	+	state = 1;
1508	+	await(latch);
1509	+	state = 2;
1510	+	}
1511	+	}
1512	+
1513	+	public LatchAwaiter awaiter(CountDownLatch latch) {
1514	+	return new LatchAwaiter(latch);
1515	+	}
1516	+
1517	+	public void await(CountDownLatch latch, long timeoutMillis) {
1518	+	try {
1519	+	if (!latch.await(timeoutMillis, MILLISECONDS))
1520	+	fail("timed out waiting for CountDownLatch for "
1521	+	+ (timeoutMillis/1000) + " sec");
1522	+	} catch (Throwable fail) {
1523	+	threadUnexpectedException(fail);
1524	+	}
1525	+	}
1526	+
1527	+	public void await(CountDownLatch latch) {
1528	+	await(latch, LONG_DELAY_MS);
1529	+	}
1530	+
1531	+	public void await(Semaphore semaphore) {
1532	+	try {
1533	+	if (!semaphore.tryAcquire(LONG_DELAY_MS, MILLISECONDS))
1534	+	fail("timed out waiting for Semaphore for "
1535	+	+ (LONG_DELAY_MS/1000) + " sec");
1536	+	} catch (Throwable fail) {
1537	+	threadUnexpectedException(fail);
1538	+	}
1539	+	}
1540	+
1541	+	//     /**
1542	+	//      * Spin-waits up to LONG_DELAY_MS until flag becomes true.
1543	+	//      */
1544	+	//     public void await(AtomicBoolean flag) {
1545	+	//         await(flag, LONG_DELAY_MS);
1546	+	//     }
1547	+
1548	+	//     /**
1549	+	//      * Spin-waits up to the specified timeout until flag becomes true.
1550	+	//      */
1551	+	//     public void await(AtomicBoolean flag, long timeoutMillis) {
1552	+	//         long startTime = System.nanoTime();
1553	+	//         while (!flag.get()) {
1554	+	//             if (millisElapsedSince(startTime) > timeoutMillis)
1555	+	//                 throw new AssertionFailedError("timed out");
1556	+	//             Thread.yield();
1557	+	//         }
1558	+	//     }
1559	+
1560	+	public static class NPETask implements Callable<String> {
1561	+	public String call() { throw new NullPointerException(); }
1562	+	}
1563	+
1564	+	public static class CallableOne implements Callable<Integer> {
1565	+	public Integer call() { return one; }
1566	+	}
1567	+
1568	+	public class ShortRunnable extends CheckedRunnable {
1569	+	protected void realRun() throws Throwable {
1570	+	delay(SHORT_DELAY_MS);
1571	+	}
1572	+	}
1573	+
1574	+	public class ShortInterruptedRunnable extends CheckedInterruptedRunnable {
1575	+	protected void realRun() throws InterruptedException {
1576	+	delay(SHORT_DELAY_MS);
1577	+	}
1578	+	}
1579	+
1580	+	public class SmallRunnable extends CheckedRunnable {
1581	+	protected void realRun() throws Throwable {
1582	+	delay(SMALL_DELAY_MS);
1583	+	}
1584	+	}
1585	+
1586	+	public class SmallPossiblyInterruptedRunnable extends CheckedRunnable {
1587	+	protected void realRun() {
1588	+	try {
1589	+	delay(SMALL_DELAY_MS);
1590	+	} catch (InterruptedException ok) {}
1591	+	}
1592	+	}
1593	+
1594	+	public class SmallCallable extends CheckedCallable {
1595	+	protected Object realCall() throws InterruptedException {
1596	+	delay(SMALL_DELAY_MS);
1597		return Boolean.TRUE;
1598		}
1599		}
1600
1601	<	public class SmallInterruptedRunnable implements Runnable {
1601	>	public class MediumRunnable extends CheckedRunnable {
1602	>	protected void realRun() throws Throwable {
1603	>	delay(MEDIUM_DELAY_MS);
1604	>	}
1605	>	}
1606	>
1607	>	public class MediumInterruptedRunnable extends CheckedInterruptedRunnable {
1608	>	protected void realRun() throws InterruptedException {
1609	>	delay(MEDIUM_DELAY_MS);
1610	>	}
1611	>	}
1612	>
1613	>	public Runnable possiblyInterruptedRunnable(final long timeoutMillis) {
1614	>	return new CheckedRunnable() {
1615	>	protected void realRun() {
1616	>	try {
1617	>	delay(timeoutMillis);
1618	>	} catch (InterruptedException ok) {}
1619	>	}};
1620	>	}
1621	>
1622	>	public class MediumPossiblyInterruptedRunnable extends CheckedRunnable {
1623	>	protected void realRun() {
1624	>	try {
1625	>	delay(MEDIUM_DELAY_MS);
1626	>	} catch (InterruptedException ok) {}
1627	>	}
1628	>	}
1629	>
1630	>	public class LongPossiblyInterruptedRunnable extends CheckedRunnable {
1631	>	protected void realRun() {
1632	>	try {
1633	>	delay(LONG_DELAY_MS);
1634	>	} catch (InterruptedException ok) {}
1635	>	}
1636	>	}
1637	>
1638	>	/**
1639	>	* For use as ThreadFactory in constructors
1640	>	*/
1641	>	public static class SimpleThreadFactory implements ThreadFactory {
1642	>	public Thread newThread(Runnable r) {
1643	>	return new Thread(r);
1644	>	}
1645	>	}
1646	>
1647	>	public interface TrackedRunnable extends Runnable {
1648	>	boolean isDone();
1649	>	}
1650	>
1651	>	public static TrackedRunnable trackedRunnable(final long timeoutMillis) {
1652	>	return new TrackedRunnable() {
1653	>	private volatile boolean done = false;
1654	>	public boolean isDone() { return done; }
1655	>	public void run() {
1656	>	try {
1657	>	delay(timeoutMillis);
1658	>	done = true;
1659	>	} catch (InterruptedException ok) {}
1660	>	}
1661	>	};
1662	>	}
1663	>
1664	>	public static class TrackedShortRunnable implements Runnable {
1665	>	public volatile boolean done = false;
1666		public void run() {
1667		try {
1668	<	Thread.sleep(SMALL_DELAY_MS);
1669	<	threadFail("should throw IE");
1670	<	}
216	<	catch(InterruptedException success) {
217	<	}
1668	>	delay(SHORT_DELAY_MS);
1669	>	done = true;
1670	>	} catch (InterruptedException ok) {}
1671		}
1672		}
1673
1674	+	public static class TrackedSmallRunnable implements Runnable {
1675	+	public volatile boolean done = false;
1676	+	public void run() {
1677	+	try {
1678	+	delay(SMALL_DELAY_MS);
1679	+	done = true;
1680	+	} catch (InterruptedException ok) {}
1681	+	}
1682	+	}
1683
1684	<	public class MediumRunnable implements Runnable {
1684	>	public static class TrackedMediumRunnable implements Runnable {
1685	>	public volatile boolean done = false;
1686		public void run() {
1687		try {
1688	<	Thread.sleep(MEDIUM_DELAY_MS);
1689	<	}
1690	<	catch(Exception e) {
1691	<	threadFail("unexpectedException");
1692	<	}
1688	>	delay(MEDIUM_DELAY_MS);
1689	>	done = true;
1690	>	} catch (InterruptedException ok) {}
1691	>	}
1692	>	}
1693	>
1694	>	public static class TrackedLongRunnable implements Runnable {
1695	>	public volatile boolean done = false;
1696	>	public void run() {
1697	>	try {
1698	>	delay(LONG_DELAY_MS);
1699	>	done = true;
1700	>	} catch (InterruptedException ok) {}
1701		}
1702		}
1703
1704	<	public class MediumInterruptedRunnable implements Runnable {
1704	>	public static class TrackedNoOpRunnable implements Runnable {
1705	>	public volatile boolean done = false;
1706		public void run() {
1707	+	done = true;
1708	+	}
1709	+	}
1710	+
1711	+	public static class TrackedCallable implements Callable {
1712	+	public volatile boolean done = false;
1713	+	public Object call() {
1714	+	try {
1715	+	delay(SMALL_DELAY_MS);
1716	+	done = true;
1717	+	} catch (InterruptedException ok) {}
1718	+	return Boolean.TRUE;
1719	+	}
1720	+	}
1721	+
1722	+	/**
1723	+	* Analog of CheckedRunnable for RecursiveAction
1724	+	*/
1725	+	public abstract class CheckedRecursiveAction extends RecursiveAction {
1726	+	protected abstract void realCompute() throws Throwable;
1727	+
1728	+	@Override protected final void compute() {
1729		try {
1730	<	Thread.sleep(MEDIUM_DELAY_MS);
1731	<	threadFail("should throw IE");
1730	>	realCompute();
1731	>	} catch (Throwable fail) {
1732	>	threadUnexpectedException(fail);
1733		}
1734	<	catch(InterruptedException success) {
1734	>	}
1735	>	}
1736	>
1737	>	/**
1738	>	* Analog of CheckedCallable for RecursiveTask
1739	>	*/
1740	>	public abstract class CheckedRecursiveTask<T> extends RecursiveTask<T> {
1741	>	protected abstract T realCompute() throws Throwable;
1742	>
1743	>	@Override protected final T compute() {
1744	>	try {
1745	>	return realCompute();
1746	>	} catch (Throwable fail) {
1747	>	threadUnexpectedException(fail);
1748	>	return null;
1749		}
1750		}
1751		}
1752
1753	<	public class MediumPossiblyInterruptedRunnable implements Runnable {
1754	<	public void run() {
1753	>	/**
1754	>	* For use as RejectedExecutionHandler in constructors
1755	>	*/
1756	>	public static class NoOpREHandler implements RejectedExecutionHandler {
1757	>	public void rejectedExecution(Runnable r,
1758	>	ThreadPoolExecutor executor) {}
1759	>	}
1760	>
1761	>	/**
1762	>	* A CyclicBarrier that uses timed await and fails with
1763	>	* AssertionFailedErrors instead of throwing checked exceptions.
1764	>	*/
1765	>	public static class CheckedBarrier extends CyclicBarrier {
1766	>	public CheckedBarrier(int parties) { super(parties); }
1767	>
1768	>	public int await() {
1769		try {
1770	<	Thread.sleep(MEDIUM_DELAY_MS);
1770	>	return super.await(2 * LONG_DELAY_MS, MILLISECONDS);
1771	>	} catch (TimeoutException timedOut) {
1772	>	throw new AssertionFailedError("timed out");
1773	>	} catch (Exception fail) {
1774	>	AssertionFailedError afe =
1775	>	new AssertionFailedError("Unexpected exception: " + fail);
1776	>	afe.initCause(fail);
1777	>	throw afe;
1778		}
1779	<	catch(InterruptedException success) {
1779	>	}
1780	>	}
1781	>
1782	>	void checkEmpty(BlockingQueue q) {
1783	>	try {
1784	>	assertTrue(q.isEmpty());
1785	>	assertEquals(0, q.size());
1786	>	assertNull(q.peek());
1787	>	assertNull(q.poll());
1788	>	assertNull(q.poll(0, MILLISECONDS));
1789	>	assertEquals(q.toString(), "[]");
1790	>	assertTrue(Arrays.equals(q.toArray(), new Object[0]));
1791	>	assertFalse(q.iterator().hasNext());
1792	>	try {
1793	>	q.element();
1794	>	shouldThrow();
1795	>	} catch (NoSuchElementException success) {}
1796	>	try {
1797	>	q.iterator().next();
1798	>	shouldThrow();
1799	>	} catch (NoSuchElementException success) {}
1800	>	try {
1801	>	q.remove();
1802	>	shouldThrow();
1803	>	} catch (NoSuchElementException success) {}
1804	>	} catch (InterruptedException fail) { threadUnexpectedException(fail); }
1805	>	}
1806	>
1807	>	void assertSerialEquals(Object x, Object y) {
1808	>	assertTrue(Arrays.equals(serialBytes(x), serialBytes(y)));
1809	>	}
1810	>
1811	>	void assertNotSerialEquals(Object x, Object y) {
1812	>	assertFalse(Arrays.equals(serialBytes(x), serialBytes(y)));
1813	>	}
1814	>
1815	>	byte[] serialBytes(Object o) {
1816	>	try {
1817	>	ByteArrayOutputStream bos = new ByteArrayOutputStream();
1818	>	ObjectOutputStream oos = new ObjectOutputStream(bos);
1819	>	oos.writeObject(o);
1820	>	oos.flush();
1821	>	oos.close();
1822	>	return bos.toByteArray();
1823	>	} catch (Throwable fail) {
1824	>	threadUnexpectedException(fail);
1825	>	return new byte[0];
1826	>	}
1827	>	}
1828	>
1829	>	@SuppressWarnings("unchecked")
1830	>	<T> T serialClone(T o) {
1831	>	try {
1832	>	ObjectInputStream ois = new ObjectInputStream
1833	>	(new ByteArrayInputStream(serialBytes(o)));
1834	>	T clone = (T) ois.readObject();
1835	>	assertSame(o.getClass(), clone.getClass());
1836	>	return clone;
1837	>	} catch (Throwable fail) {
1838	>	threadUnexpectedException(fail);
1839	>	return null;
1840	>	}
1841	>	}
1842	>
1843	>	public void assertThrows(Class<? extends Throwable> expectedExceptionClass,
1844	>	Runnable... throwingActions) {
1845	>	for (Runnable throwingAction : throwingActions) {
1846	>	boolean threw = false;
1847	>	try { throwingAction.run(); }
1848	>	catch (Throwable t) {
1849	>	threw = true;
1850	>	if (!expectedExceptionClass.isInstance(t)) {
1851	>	AssertionFailedError afe =
1852	>	new AssertionFailedError
1853	>	("Expected " + expectedExceptionClass.getName() +
1854	>	", got " + t.getClass().getName());
1855	>	afe.initCause(t);
1856	>	threadUnexpectedException(afe);
1857	>	}
1858		}
1859	+	if (!threw)
1860	+	shouldThrow(expectedExceptionClass.getName());
1861		}
1862		}
1863	<
1863	>
1864	>	public void assertIteratorExhausted(Iterator<?> it) {
1865	>	try {
1866	>	it.next();
1867	>	shouldThrow();
1868	>	} catch (NoSuchElementException success) {}
1869	>	assertFalse(it.hasNext());
1870	>	}
1871	>
1872	>	public <T> Callable<T> callableThrowing(final Exception ex) {
1873	>	return new Callable<T>() { public T call() throws Exception { throw ex; }};
1874	>	}
1875	>
1876	>	public Runnable runnableThrowing(final RuntimeException ex) {
1877	>	return new Runnable() { public void run() { throw ex; }};
1878	>	}
1879	>
1880	>	/** A reusable thread pool to be shared by tests. */
1881	>	static final ExecutorService cachedThreadPool =
1882	>	new ThreadPoolExecutor(0, Integer.MAX_VALUE,
1883	>	1000L, MILLISECONDS,
1884	>	new SynchronousQueue<Runnable>());
1885	>
1886	>	static <T> void shuffle(T[] array) {
1887	>	Collections.shuffle(Arrays.asList(array), ThreadLocalRandom.current());
1888	>	}
1889		}

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