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

Comparing jsr166/src/test/tck/JSR166TestCase.java (file contents):
Revision 1.2 by dl, Sat Sep 20 00:31:57 2003 UTC vs.
Revision 1.183 by jsr166, Sat Jan 23 20:15:28 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	>	* @build *
13	>	* @run junit/othervm/timeout=1000 -Djsr166.testImplementationDetails=true JSR166TestCase
14	>	*/
15
16	+	import static java.util.concurrent.TimeUnit.MILLISECONDS;
17	+	import static java.util.concurrent.TimeUnit.MINUTES;
18	+	import static java.util.concurrent.TimeUnit.NANOSECONDS;
19	+
20	+	import java.io.ByteArrayInputStream;
21	+	import java.io.ByteArrayOutputStream;
22	+	import java.io.ObjectInputStream;
23	+	import java.io.ObjectOutputStream;
24	+	import java.lang.management.ManagementFactory;
25	+	import java.lang.management.ThreadInfo;
26	+	import java.lang.management.ThreadMXBean;
27	+	import java.lang.reflect.Constructor;
28	+	import java.lang.reflect.Method;
29	+	import java.lang.reflect.Modifier;
30	+	import java.nio.file.Files;
31	+	import java.nio.file.Paths;
32	+	import java.security.CodeSource;
33	+	import java.security.Permission;
34	+	import java.security.PermissionCollection;
35	+	import java.security.Permissions;
36	+	import java.security.Policy;
37	+	import java.security.ProtectionDomain;
38	+	import java.security.SecurityPermission;
39	+	import java.util.ArrayList;
40	+	import java.util.Arrays;
41	+	import java.util.Date;
42	+	import java.util.Enumeration;
43	+	import java.util.Iterator;
44	+	import java.util.List;
45	+	import java.util.NoSuchElementException;
46	+	import java.util.PropertyPermission;
47	+	import java.util.concurrent.BlockingQueue;
48	+	import java.util.concurrent.Callable;
49	+	import java.util.concurrent.CountDownLatch;
50	+	import java.util.concurrent.CyclicBarrier;
51	+	import java.util.concurrent.ExecutionException;
52	+	import java.util.concurrent.Executors;
53	+	import java.util.concurrent.ExecutorService;
54	+	import java.util.concurrent.ForkJoinPool;
55	+	import java.util.concurrent.Future;
56	+	import java.util.concurrent.RecursiveAction;
57	+	import java.util.concurrent.RecursiveTask;
58	+	import java.util.concurrent.RejectedExecutionHandler;
59	+	import java.util.concurrent.Semaphore;
60	+	import java.util.concurrent.ThreadFactory;
61	+	import java.util.concurrent.ThreadPoolExecutor;
62	+	import java.util.concurrent.TimeoutException;
63	+	import java.util.concurrent.atomic.AtomicReference;
64	+	import java.util.regex.Matcher;
65	+	import java.util.regex.Pattern;
66	+
67	+	import junit.framework.AssertionFailedError;
68	+	import junit.framework.Test;
69	+	import junit.framework.TestCase;
70	+	import junit.framework.TestResult;
71	+	import junit.framework.TestSuite;
72
73		/**
74	<	* Base class for JSR166 Junit TCK tests.  Defines some constants and
75	<	* utility methods, as well as a simple framework for helping to make
76	<	* sure that assertions failing in generated threads cause the
77	<	* associated test that generated them to itself fail (which JUnit doe
78	<	* not otherwise arrange).  The rules for creating such tests are:
74	>	* Base class for JSR166 Junit TCK tests.  Defines some constants,
75	>	* utility methods and classes, as well as a simple framework for
76	>	* helping to make sure that assertions failing in generated threads
77	>	* cause the associated test that generated them to itself fail (which
78	>	* JUnit does not otherwise arrange).  The rules for creating such
79	>	* tests are:
80		*
81		* <ol>
82		*
83	<	* <li> All assertions in code running in generated threads must use
84	<	* the forms {@link threadFail} , {@link threadAssertTrue} {@link
85	<	* threadAssertEquals}, or {@link threadAssertNull}, (not
86	<	* <tt>fail</tt>, <tt>assertTrue</tt>, etc.) It is OK (but not
83	>	* <li>All assertions in code running in generated threads must use
84	>	* the forms {@link #threadFail}, {@link #threadAssertTrue}, {@link
85	>	* #threadAssertEquals}, or {@link #threadAssertNull}, (not
86	>	* {@code fail}, {@code assertTrue}, etc.) It is OK (but not
87		* particularly recommended) for other code to use these forms too.
88		* Only the most typically used JUnit assertion methods are defined
89	<	* this way, but enough to live with.</li>
89	>	* this way, but enough to live with.
90		*
91	<	* <li> If you override {@link setUp} or {@link tearDown}, make sure
92	<	* to invoke <tt>super.setUp</tt> and <tt>super.tearDown</tt> within
91	>	* <li>If you override {@link #setUp} or {@link #tearDown}, make sure
92	>	* to invoke {@code super.setUp} and {@code super.tearDown} within
93		* them. These methods are used to clear and check for thread
94	<	* assertion failures.</li>
94	>	* assertion failures.
95		*
96	<	* <li>All delays and timeouts must use one of the constants {@link
97	<	* SHORT_DELAY_MS}, {@link SMALL_DELAY_MS}, {@link MEDIUM_DELAY_MS},
98	<	* {@link LONG_DELAY_MS}. The idea here is that a SHORT is always
99	<	* discriminatable from zero time, and always allows enough time for
100	<	* the small amounts of computation (creating a thread, calling a few
96	>	* <li>All delays and timeouts must use one of the constants {@code
97	>	* SHORT_DELAY_MS}, {@code SMALL_DELAY_MS}, {@code MEDIUM_DELAY_MS},
98	>	* {@code LONG_DELAY_MS}. The idea here is that a SHORT is always
99	>	* discriminable from zero time, and always allows enough time for the
100	>	* small amounts of computation (creating a thread, calling a few
101		* methods, etc) needed to reach a timeout point. Similarly, a SMALL
102		* is always discriminable as larger than SHORT and smaller than
103		* MEDIUM.  And so on. These constants are set to conservative values,
104		* but even so, if there is ever any doubt, they can all be increased
105	<	* in one spot to rerun tests on slower platforms</li>
105	>	* in one spot to rerun tests on slower platforms.
106		*
107	<	* <li> All threads generated must be joined inside each test case
108	<	* method (or <tt>fail</tt> to do so) before returning from the
109	<	* method. The {@link joinPool} method can be used to do this when
110	<	* using Executors.</li>
107	>	* <li>All threads generated must be joined inside each test case
108	>	* method (or {@code fail} to do so) before returning from the
109	>	* method. The {@code joinPool} method can be used to do this when
110	>	* using Executors.
111		*
112		* </ol>
113	+	*
114	+	* <p><b>Other notes</b>
115	+	* <ul>
116	+	*
117	+	* <li>Usually, there is one testcase method per JSR166 method
118	+	* covering "normal" operation, and then as many exception-testing
119	+	* methods as there are exceptions the method can throw. Sometimes
120	+	* there are multiple tests per JSR166 method when the different
121	+	* "normal" behaviors differ significantly. And sometimes testcases
122	+	* cover multiple methods when they cannot be tested in isolation.
123	+	*
124	+	* <li>The documentation style for testcases is to provide as javadoc
125	+	* a simple sentence or two describing the property that the testcase
126	+	* method purports to test. The javadocs do not say anything about how
127	+	* the property is tested. To find out, read the code.
128	+	*
129	+	* <li>These tests are "conformance tests", and do not attempt to
130	+	* test throughput, latency, scalability or other performance factors
131	+	* (see the separate "jtreg" tests for a set intended to check these
132	+	* for the most central aspects of functionality.) So, most tests use
133	+	* the smallest sensible numbers of threads, collection sizes, etc
134	+	* needed to check basic conformance.
135	+	*
136	+	* <li>The test classes currently do not declare inclusion in
137	+	* any particular package to simplify things for people integrating
138	+	* them in TCK test suites.
139	+	*
140	+	* <li>As a convenience, the {@code main} of this class (JSR166TestCase)
141	+	* runs all JSR166 unit tests.
142	+	*
143	+	* </ul>
144		*/
145		public class JSR166TestCase extends TestCase {
146	+	private static final boolean useSecurityManager =
147	+	Boolean.getBoolean("jsr166.useSecurityManager");
148	+
149	+	protected static final boolean expensiveTests =
150	+	Boolean.getBoolean("jsr166.expensiveTests");
151	+
152	+	/**
153	+	* If true, also run tests that are not part of the official tck
154	+	* because they test unspecified implementation details.
155	+	*/
156	+	protected static final boolean testImplementationDetails =
157	+	Boolean.getBoolean("jsr166.testImplementationDetails");
158	+
159	+	/**
160	+	* If true, report on stdout all "slow" tests, that is, ones that
161	+	* take more than profileThreshold milliseconds to execute.
162	+	*/
163	+	private static final boolean profileTests =
164	+	Boolean.getBoolean("jsr166.profileTests");
165	+
166	+	/**
167	+	* The number of milliseconds that tests are permitted for
168	+	* execution without being reported, when profileTests is set.
169	+	*/
170	+	private static final long profileThreshold =
171	+	Long.getLong("jsr166.profileThreshold", 100);
172	+
173	+	/**
174	+	* The number of repetitions per test (for tickling rare bugs).
175	+	*/
176	+	private static final int runsPerTest =
177	+	Integer.getInteger("jsr166.runsPerTest", 1);
178	+
179	+	/**
180	+	* The number of repetitions of the test suite (for finding leaks?).
181	+	*/
182	+	private static final int suiteRuns =
183	+	Integer.getInteger("jsr166.suiteRuns", 1);
184	+
185	+	/**
186	+	* The scaling factor to apply to standard delays used in tests.
187	+	*/
188	+	private static final int delayFactor =
189	+	Integer.getInteger("jsr166.delay.factor", 1);
190	+
191	+	public JSR166TestCase() { super(); }
192	+	public JSR166TestCase(String name) { super(name); }
193	+
194	+	/**
195	+	* A filter for tests to run, matching strings of the form
196	+	* methodName(className), e.g. "testInvokeAll5(ForkJoinPoolTest)"
197	+	* Usefully combined with jsr166.runsPerTest.
198	+	*/
199	+	private static final Pattern methodFilter = methodFilter();
200	+
201	+	private static Pattern methodFilter() {
202	+	String regex = System.getProperty("jsr166.methodFilter");
203	+	return (regex == null) ? null : Pattern.compile(regex);
204	+	}
205	+
206	+	// Instrumentation to debug very rare, but very annoying hung test runs.
207	+	static volatile TestCase currentTestCase;
208	+	// static volatile int currentRun = 0;
209	+	static {
210	+	Runnable checkForWedgedTest = new Runnable() { public void run() {
211	+	// Avoid spurious reports with enormous runsPerTest.
212	+	// A single test case run should never take more than 1 second.
213	+	// But let's cap it at the high end too ...
214	+	final int timeoutMinutes =
215	+	Math.min(15, Math.max(runsPerTest / 60, 1));
216	+	for (TestCase lastTestCase = currentTestCase;;) {
217	+	try { MINUTES.sleep(timeoutMinutes); }
218	+	catch (InterruptedException unexpected) { break; }
219	+	if (lastTestCase == currentTestCase) {
220	+	System.err.printf(
221	+	"Looks like we're stuck running test: %s%n",
222	+	lastTestCase);
223	+	//                     System.err.printf(
224	+	//                         "Looks like we're stuck running test: %s (%d/%d)%n",
225	+	//                         lastTestCase, currentRun, runsPerTest);
226	+	//                     System.err.println("availableProcessors=" +
227	+	//                         Runtime.getRuntime().availableProcessors());
228	+	//                     System.err.printf("cpu model = %s%n", cpuModel());
229	+	dumpTestThreads();
230	+	// one stack dump is probably enough; more would be spam
231	+	break;
232	+	}
233	+	lastTestCase = currentTestCase;
234	+	}}};
235	+	Thread thread = new Thread(checkForWedgedTest, "checkForWedgedTest");
236	+	thread.setDaemon(true);
237	+	thread.start();
238	+	}
239	+
240	+	//     public static String cpuModel() {
241	+	//         try {
242	+	//             Matcher matcher = Pattern.compile("model name\\s*: (.*)")
243	+	//                 .matcher(new String(
244	+	//                      Files.readAllBytes(Paths.get("/proc/cpuinfo")), "UTF-8"));
245	+	//             matcher.find();
246	+	//             return matcher.group(1);
247	+	//         } catch (Exception ex) { return null; }
248	+	//     }
249	+
250	+	public void runBare() throws Throwable {
251	+	currentTestCase = this;
252	+	if (methodFilter == null
253	+	|| methodFilter.matcher(toString()).find())
254	+	super.runBare();
255	+	}
256	+
257	+	protected void runTest() throws Throwable {
258	+	for (int i = 0; i < runsPerTest; i++) {
259	+	// currentRun = i;
260	+	if (profileTests)
261	+	runTestProfiled();
262	+	else
263	+	super.runTest();
264	+	}
265	+	}
266	+
267	+	protected void runTestProfiled() throws Throwable {
268	+	for (int i = 0; i < 2; i++) {
269	+	long startTime = System.nanoTime();
270	+	super.runTest();
271	+	long elapsedMillis = millisElapsedSince(startTime);
272	+	if (elapsedMillis < profileThreshold)
273	+	break;
274	+	// Never report first run of any test; treat it as a
275	+	// warmup run, notably to trigger all needed classloading,
276	+	if (i > 0)
277	+	System.out.printf("%n%s: %d%n", toString(), elapsedMillis);
278	+	}
279	+	}
280	+
281	+	/**
282	+	* Runs all JSR166 unit tests using junit.textui.TestRunner.
283	+	*/
284	+	public static void main(String[] args) {
285	+	main(suite(), args);
286	+	}
287	+
288	+	static class PithyResultPrinter extends junit.textui.ResultPrinter {
289	+	PithyResultPrinter(java.io.PrintStream writer) { super(writer); }
290	+	long runTime;
291	+	public void startTest(Test test) {}
292	+	protected void printHeader(long runTime) {
293	+	this.runTime = runTime; // defer printing for later
294	+	}
295	+	protected void printFooter(TestResult result) {
296	+	if (result.wasSuccessful()) {
297	+	getWriter().println("OK (" + result.runCount() + " tests)"
298	+	+ "  Time: " + elapsedTimeAsString(runTime));
299	+	} else {
300	+	getWriter().println("Time: " + elapsedTimeAsString(runTime));
301	+	super.printFooter(result);
302	+	}
303	+	}
304	+	}
305	+
306	+	/**
307	+	* Returns a TestRunner that doesn't bother with unnecessary
308	+	* fluff, like printing a "." for each test case.
309	+	*/
310	+	static junit.textui.TestRunner newPithyTestRunner() {
311	+	junit.textui.TestRunner runner = new junit.textui.TestRunner();
312	+	runner.setPrinter(new PithyResultPrinter(System.out));
313	+	return runner;
314	+	}
315	+
316	+	/**
317	+	* Runs all unit tests in the given test suite.
318	+	* Actual behavior influenced by jsr166.* system properties.
319	+	*/
320	+	static void main(Test suite, String[] args) {
321	+	if (useSecurityManager) {
322	+	System.err.println("Setting a permissive security manager");
323	+	Policy.setPolicy(permissivePolicy());
324	+	System.setSecurityManager(new SecurityManager());
325	+	}
326	+	for (int i = 0; i < suiteRuns; i++) {
327	+	TestResult result = newPithyTestRunner().doRun(suite);
328	+	if (!result.wasSuccessful())
329	+	System.exit(1);
330	+	System.gc();
331	+	System.runFinalization();
332	+	}
333	+	}
334	+
335	+	public static TestSuite newTestSuite(Object... suiteOrClasses) {
336	+	TestSuite suite = new TestSuite();
337	+	for (Object suiteOrClass : suiteOrClasses) {
338	+	if (suiteOrClass instanceof TestSuite)
339	+	suite.addTest((TestSuite) suiteOrClass);
340	+	else if (suiteOrClass instanceof Class)
341	+	suite.addTest(new TestSuite((Class<?>) suiteOrClass));
342	+	else
343	+	throw new ClassCastException("not a test suite or class");
344	+	}
345	+	return suite;
346	+	}
347	+
348	+	public static void addNamedTestClasses(TestSuite suite,
349	+	String... testClassNames) {
350	+	for (String testClassName : testClassNames) {
351	+	try {
352	+	Class<?> testClass = Class.forName(testClassName);
353	+	Method m = testClass.getDeclaredMethod("suite",
354	+	new Class<?>[0]);
355	+	suite.addTest(newTestSuite((Test)m.invoke(null)));
356	+	} catch (Exception e) {
357	+	throw new Error("Missing test class", e);
358	+	}
359	+	}
360	+	}
361	+
362	+	public static final double JAVA_CLASS_VERSION;
363	+	public static final String JAVA_SPECIFICATION_VERSION;
364	+	static {
365	+	try {
366	+	JAVA_CLASS_VERSION = java.security.AccessController.doPrivileged(
367	+	new java.security.PrivilegedAction<Double>() {
368	+	public Double run() {
369	+	return Double.valueOf(System.getProperty("java.class.version"));}});
370	+	JAVA_SPECIFICATION_VERSION = java.security.AccessController.doPrivileged(
371	+	new java.security.PrivilegedAction<String>() {
372	+	public String run() {
373	+	return System.getProperty("java.specification.version");}});
374	+	} catch (Throwable t) {
375	+	throw new Error(t);
376	+	}
377	+	}
378	+
379	+	public static boolean atLeastJava6() { return JAVA_CLASS_VERSION >= 50.0; }
380	+	public static boolean atLeastJava7() { return JAVA_CLASS_VERSION >= 51.0; }
381	+	public static boolean atLeastJava8() { return JAVA_CLASS_VERSION >= 52.0; }
382	+	public static boolean atLeastJava9() {
383	+	return JAVA_CLASS_VERSION >= 53.0
384	+	// As of 2015-09, java9 still uses 52.0 class file version
385	+	|| JAVA_SPECIFICATION_VERSION.matches("^(1\\.)?(9|[0-9][0-9])$");
386	+	}
387	+	public static boolean atLeastJava10() {
388	+	return JAVA_CLASS_VERSION >= 54.0
389	+	|| JAVA_SPECIFICATION_VERSION.matches("^(1\\.)?[0-9][0-9]$");
390	+	}
391	+
392	+	/**
393	+	* Collects all JSR166 unit tests as one suite.
394	+	*/
395	+	public static Test suite() {
396	+	// Java7+ test classes
397	+	TestSuite suite = newTestSuite(
398	+	ForkJoinPoolTest.suite(),
399	+	ForkJoinTaskTest.suite(),
400	+	RecursiveActionTest.suite(),
401	+	RecursiveTaskTest.suite(),
402	+	LinkedTransferQueueTest.suite(),
403	+	PhaserTest.suite(),
404	+	ThreadLocalRandomTest.suite(),
405	+	AbstractExecutorServiceTest.suite(),
406	+	AbstractQueueTest.suite(),
407	+	AbstractQueuedSynchronizerTest.suite(),
408	+	AbstractQueuedLongSynchronizerTest.suite(),
409	+	ArrayBlockingQueueTest.suite(),
410	+	ArrayDequeTest.suite(),
411	+	AtomicBooleanTest.suite(),
412	+	AtomicIntegerArrayTest.suite(),
413	+	AtomicIntegerFieldUpdaterTest.suite(),
414	+	AtomicIntegerTest.suite(),
415	+	AtomicLongArrayTest.suite(),
416	+	AtomicLongFieldUpdaterTest.suite(),
417	+	AtomicLongTest.suite(),
418	+	AtomicMarkableReferenceTest.suite(),
419	+	AtomicReferenceArrayTest.suite(),
420	+	AtomicReferenceFieldUpdaterTest.suite(),
421	+	AtomicReferenceTest.suite(),
422	+	AtomicStampedReferenceTest.suite(),
423	+	ConcurrentHashMapTest.suite(),
424	+	ConcurrentLinkedDequeTest.suite(),
425	+	ConcurrentLinkedQueueTest.suite(),
426	+	ConcurrentSkipListMapTest.suite(),
427	+	ConcurrentSkipListSubMapTest.suite(),
428	+	ConcurrentSkipListSetTest.suite(),
429	+	ConcurrentSkipListSubSetTest.suite(),
430	+	CopyOnWriteArrayListTest.suite(),
431	+	CopyOnWriteArraySetTest.suite(),
432	+	CountDownLatchTest.suite(),
433	+	CyclicBarrierTest.suite(),
434	+	DelayQueueTest.suite(),
435	+	EntryTest.suite(),
436	+	ExchangerTest.suite(),
437	+	ExecutorsTest.suite(),
438	+	ExecutorCompletionServiceTest.suite(),
439	+	FutureTaskTest.suite(),
440	+	LinkedBlockingDequeTest.suite(),
441	+	LinkedBlockingQueueTest.suite(),
442	+	LinkedListTest.suite(),
443	+	LockSupportTest.suite(),
444	+	PriorityBlockingQueueTest.suite(),
445	+	PriorityQueueTest.suite(),
446	+	ReentrantLockTest.suite(),
447	+	ReentrantReadWriteLockTest.suite(),
448	+	ScheduledExecutorTest.suite(),
449	+	ScheduledExecutorSubclassTest.suite(),
450	+	SemaphoreTest.suite(),
451	+	SynchronousQueueTest.suite(),
452	+	SystemTest.suite(),
453	+	ThreadLocalTest.suite(),
454	+	ThreadPoolExecutorTest.suite(),
455	+	ThreadPoolExecutorSubclassTest.suite(),
456	+	ThreadTest.suite(),
457	+	TimeUnitTest.suite(),
458	+	TreeMapTest.suite(),
459	+	TreeSetTest.suite(),
460	+	TreeSubMapTest.suite(),
461	+	TreeSubSetTest.suite());
462	+
463	+	// Java8+ test classes
464	+	if (atLeastJava8()) {
465	+	String[] java8TestClassNames = {
466	+	"Atomic8Test",
467	+	"CompletableFutureTest",
468	+	"ConcurrentHashMap8Test",
469	+	"CountedCompleterTest",
470	+	"DoubleAccumulatorTest",
471	+	"DoubleAdderTest",
472	+	"ForkJoinPool8Test",
473	+	"ForkJoinTask8Test",
474	+	"LongAccumulatorTest",
475	+	"LongAdderTest",
476	+	"SplittableRandomTest",
477	+	"StampedLockTest",
478	+	"SubmissionPublisherTest",
479	+	"ThreadLocalRandom8Test",
480	+	};
481	+	addNamedTestClasses(suite, java8TestClassNames);
482	+	}
483	+
484	+	// Java9+ test classes
485	+	if (atLeastJava9()) {
486	+	String[] java9TestClassNames = {
487	+	// Currently empty, but expecting varhandle tests
488	+	};
489	+	addNamedTestClasses(suite, java9TestClassNames);
490	+	}
491	+
492	+	return suite;
493	+	}
494	+
495	+	/** Returns list of junit-style test method names in given class. */
496	+	public static ArrayList<String> testMethodNames(Class<?> testClass) {
497	+	Method[] methods = testClass.getDeclaredMethods();
498	+	ArrayList<String> names = new ArrayList<String>(methods.length);
499	+	for (Method method : methods) {
500	+	if (method.getName().startsWith("test")
501	+	&& Modifier.isPublic(method.getModifiers())
502	+	// method.getParameterCount() requires jdk8+
503	+	&& method.getParameterTypes().length == 0) {
504	+	names.add(method.getName());
505	+	}
506	+	}
507	+	return names;
508	+	}
509	+
510	+	/**
511	+	* Returns junit-style testSuite for the given test class, but
512	+	* parameterized by passing extra data to each test.
513	+	*/
514	+	public static <ExtraData> Test parameterizedTestSuite
515	+	(Class<? extends JSR166TestCase> testClass,
516	+	Class<ExtraData> dataClass,
517	+	ExtraData data) {
518	+	try {
519	+	TestSuite suite = new TestSuite();
520	+	Constructor c =
521	+	testClass.getDeclaredConstructor(dataClass, String.class);
522	+	for (String methodName : testMethodNames(testClass))
523	+	suite.addTest((Test) c.newInstance(data, methodName));
524	+	return suite;
525	+	} catch (Exception e) {
526	+	throw new Error(e);
527	+	}
528	+	}
529	+
530	+	/**
531	+	* Returns junit-style testSuite for the jdk8 extension of the
532	+	* given test class, but parameterized by passing extra data to
533	+	* each test.  Uses reflection to allow compilation in jdk7.
534	+	*/
535	+	public static <ExtraData> Test jdk8ParameterizedTestSuite
536	+	(Class<? extends JSR166TestCase> testClass,
537	+	Class<ExtraData> dataClass,
538	+	ExtraData data) {
539	+	if (atLeastJava8()) {
540	+	String name = testClass.getName();
541	+	String name8 = name.replaceAll("Test$", "8Test");
542	+	if (name.equals(name8)) throw new Error(name);
543	+	try {
544	+	return (Test)
545	+	Class.forName(name8)
546	+	.getMethod("testSuite", new Class[] { dataClass })
547	+	.invoke(null, data);
548	+	} catch (Exception e) {
549	+	throw new Error(e);
550	+	}
551	+	} else {
552	+	return new TestSuite();
553	+	}
554	+	}
555	+
556	+	// Delays for timing-dependent tests, in milliseconds.
557
558		public static long SHORT_DELAY_MS;
559		public static long SMALL_DELAY_MS;
560		public static long MEDIUM_DELAY_MS;
561		public static long LONG_DELAY_MS;
562
61	–
563		/**
564	<	* Return the shortest timed delay. This could
565	<	* be reimplmented to use for example a Property.
566	<	*/
564	>	* Returns the shortest timed delay. This can be scaled up for
565	>	* slow machines using the jsr166.delay.factor system property.
566	>	*/
567		protected long getShortDelay() {
568	<	return 50;
568	>	return 50 * delayFactor;
569		}
570
70	–
571		/**
572	<	* Set delays as multiples fo SHORT_DELAY.
572	>	* Sets delays as multiples of SHORT_DELAY.
573		*/
574	<	protected  void setDelays() {
574	>	protected void setDelays() {
575		SHORT_DELAY_MS = getShortDelay();
576	<	SMALL_DELAY_MS = SHORT_DELAY_MS * 5;
576	>	SMALL_DELAY_MS  = SHORT_DELAY_MS * 5;
577		MEDIUM_DELAY_MS = SHORT_DELAY_MS * 10;
578	<	LONG_DELAY_MS = SHORT_DELAY_MS * 50;
578	>	LONG_DELAY_MS   = SHORT_DELAY_MS * 200;
579		}
580
581		/**
582	<	* Flag set true if any threadAssert methods fail
582	>	* Returns a timeout in milliseconds to be used in tests that
583	>	* verify that operations block or time out.
584		*/
585	<	protected volatile boolean threadFailed;
585	>	long timeoutMillis() {
586	>	return SHORT_DELAY_MS / 4;
587	>	}
588
589		/**
590	<	* Initialize test to indicat that no thread assertions have failed
590	>	* Returns a new Date instance representing a time at least
591	>	* delayMillis milliseconds in the future.
592		*/
593	<	public void setUp() {
593	>	Date delayedDate(long delayMillis) {
594	>	// Add 1 because currentTimeMillis is known to round into the past.
595	>	return new Date(System.currentTimeMillis() + delayMillis + 1);
596	>	}
597	>
598	>	/**
599	>	* The first exception encountered if any threadAssertXXX method fails.
600	>	*/
601	>	private final AtomicReference<Throwable> threadFailure
602	>	= new AtomicReference<Throwable>(null);
603	>
604	>	/**
605	>	* Records an exception so that it can be rethrown later in the test
606	>	* harness thread, triggering a test case failure.  Only the first
607	>	* failure is recorded; subsequent calls to this method from within
608	>	* the same test have no effect.
609	>	*/
610	>	public void threadRecordFailure(Throwable t) {
611	>	System.err.println(t);
612	>	dumpTestThreads();
613	>	threadFailure.compareAndSet(null, t);
614	>	}
615	>
616	>	public void setUp() {
617		setDelays();
618	<	threadFailed = false;
618	>	}
619	>
620	>	void tearDownFail(String format, Object... args) {
621	>	String msg = toString() + ": " + String.format(format, args);
622	>	System.err.println(msg);
623	>	dumpTestThreads();
624	>	throw new AssertionFailedError(msg);
625	>	}
626	>
627	>	/**
628	>	* Extra checks that get done for all test cases.
629	>	*
630	>	* Triggers test case failure if any thread assertions have failed,
631	>	* by rethrowing, in the test harness thread, any exception recorded
632	>	* earlier by threadRecordFailure.
633	>	*
634	>	* Triggers test case failure if interrupt status is set in the main thread.
635	>	*/
636	>	public void tearDown() throws Exception {
637	>	Throwable t = threadFailure.getAndSet(null);
638	>	if (t != null) {
639	>	if (t instanceof Error)
640	>	throw (Error) t;
641	>	else if (t instanceof RuntimeException)
642	>	throw (RuntimeException) t;
643	>	else if (t instanceof Exception)
644	>	throw (Exception) t;
645	>	else {
646	>	AssertionFailedError afe =
647	>	new AssertionFailedError(t.toString());
648	>	afe.initCause(t);
649	>	throw afe;
650	>	}
651	>	}
652	>
653	>	if (Thread.interrupted())
654	>	tearDownFail("interrupt status set in main thread");
655	>
656	>	checkForkJoinPoolThreadLeaks();
657		}
658
659		/**
660	<	* Trigger test case failure if any thread assertions have failed
660	>	* Finds missing PoolCleaners
661		*/
662	<	public void tearDown() {
663	<	assertFalse(threadFailed);
662	>	void checkForkJoinPoolThreadLeaks() throws InterruptedException {
663	>	Thread[] survivors = new Thread[7];
664	>	int count = Thread.enumerate(survivors);
665	>	for (int i = 0; i < count; i++) {
666	>	Thread thread = survivors[i];
667	>	String name = thread.getName();
668	>	if (name.startsWith("ForkJoinPool-")) {
669	>	// give thread some time to terminate
670	>	thread.join(LONG_DELAY_MS);
671	>	if (thread.isAlive())
672	>	tearDownFail("Found leaked ForkJoinPool thread thread=%s",
673	>	thread);
674	>	}
675	>	}
676	>
677	>	if (!ForkJoinPool.commonPool()
678	>	.awaitQuiescence(LONG_DELAY_MS, MILLISECONDS))
679	>	tearDownFail("ForkJoin common pool thread stuck");
680		}
681
682	+	/**
683	+	* Just like fail(reason), but additionally recording (using
684	+	* threadRecordFailure) any AssertionFailedError thrown, so that
685	+	* the current testcase will fail.
686	+	*/
687		public void threadFail(String reason) {
688	<	threadFailed = true;
689	<	fail(reason);
688	>	try {
689	>	fail(reason);
690	>	} catch (AssertionFailedError t) {
691	>	threadRecordFailure(t);
692	>	throw t;
693	>	}
694		}
695
696	+	/**
697	+	* Just like assertTrue(b), but additionally recording (using
698	+	* threadRecordFailure) any AssertionFailedError thrown, so that
699	+	* the current testcase will fail.
700	+	*/
701		public void threadAssertTrue(boolean b) {
702	<	if (!b) {
108	<	threadFailed = true;
702	>	try {
703		assertTrue(b);
704	+	} catch (AssertionFailedError t) {
705	+	threadRecordFailure(t);
706	+	throw t;
707		}
708		}
709	+
710	+	/**
711	+	* Just like assertFalse(b), but additionally recording (using
712	+	* threadRecordFailure) any AssertionFailedError thrown, so that
713	+	* the current testcase will fail.
714	+	*/
715		public void threadAssertFalse(boolean b) {
716	<	if (b) {
114	<	threadFailed = true;
716	>	try {
717		assertFalse(b);
718	+	} catch (AssertionFailedError t) {
719	+	threadRecordFailure(t);
720	+	throw t;
721		}
722		}
723	+
724	+	/**
725	+	* Just like assertNull(x), but additionally recording (using
726	+	* threadRecordFailure) any AssertionFailedError thrown, so that
727	+	* the current testcase will fail.
728	+	*/
729		public void threadAssertNull(Object x) {
730	<	if (x != null) {
120	<	threadFailed = true;
730	>	try {
731		assertNull(x);
732	+	} catch (AssertionFailedError t) {
733	+	threadRecordFailure(t);
734	+	throw t;
735		}
736		}
737	+
738	+	/**
739	+	* Just like assertEquals(x, y), but additionally recording (using
740	+	* threadRecordFailure) any AssertionFailedError thrown, so that
741	+	* the current testcase will fail.
742	+	*/
743		public void threadAssertEquals(long x, long y) {
744	<	if (x != y) {
126	<	threadFailed = true;
744	>	try {
745		assertEquals(x, y);
746	+	} catch (AssertionFailedError t) {
747	+	threadRecordFailure(t);
748	+	throw t;
749		}
750		}
751	+
752	+	/**
753	+	* Just like assertEquals(x, y), but additionally recording (using
754	+	* threadRecordFailure) any AssertionFailedError thrown, so that
755	+	* the current testcase will fail.
756	+	*/
757		public void threadAssertEquals(Object x, Object y) {
758	<	if (x != y && (x == null || !x.equals(y))) {
132	<	threadFailed = true;
758	>	try {
759		assertEquals(x, y);
760	+	} catch (AssertionFailedError fail) {
761	+	threadRecordFailure(fail);
762	+	throw fail;
763	+	} catch (Throwable fail) {
764	+	threadUnexpectedException(fail);
765	+	}
766	+	}
767	+
768	+	/**
769	+	* Just like assertSame(x, y), but additionally recording (using
770	+	* threadRecordFailure) any AssertionFailedError thrown, so that
771	+	* the current testcase will fail.
772	+	*/
773	+	public void threadAssertSame(Object x, Object y) {
774	+	try {
775	+	assertSame(x, y);
776	+	} catch (AssertionFailedError fail) {
777	+	threadRecordFailure(fail);
778	+	throw fail;
779	+	}
780	+	}
781	+
782	+	/**
783	+	* Calls threadFail with message "should throw exception".
784	+	*/
785	+	public void threadShouldThrow() {
786	+	threadFail("should throw exception");
787	+	}
788	+
789	+	/**
790	+	* Calls threadFail with message "should throw" + exceptionName.
791	+	*/
792	+	public void threadShouldThrow(String exceptionName) {
793	+	threadFail("should throw " + exceptionName);
794	+	}
795	+
796	+	/**
797	+	* Records the given exception using {@link #threadRecordFailure},
798	+	* then rethrows the exception, wrapping it in an
799	+	* AssertionFailedError if necessary.
800	+	*/
801	+	public void threadUnexpectedException(Throwable t) {
802	+	threadRecordFailure(t);
803	+	t.printStackTrace();
804	+	if (t instanceof RuntimeException)
805	+	throw (RuntimeException) t;
806	+	else if (t instanceof Error)
807	+	throw (Error) t;
808	+	else {
809	+	AssertionFailedError afe =
810	+	new AssertionFailedError("unexpected exception: " + t);
811	+	afe.initCause(t);
812	+	throw afe;
813	+	}
814	+	}
815	+
816	+	/**
817	+	* Delays, via Thread.sleep, for the given millisecond delay, but
818	+	* if the sleep is shorter than specified, may re-sleep or yield
819	+	* until time elapses.  Ensures that the given time, as measured
820	+	* by System.nanoTime(), has elapsed.
821	+	*/
822	+	static void delay(long millis) throws InterruptedException {
823	+	long nanos = millis * (1000 * 1000);
824	+	final long wakeupTime = System.nanoTime() + nanos;
825	+	do {
826	+	if (millis > 0L)
827	+	Thread.sleep(millis);
828	+	else // too short to sleep
829	+	Thread.yield();
830	+	nanos = wakeupTime - System.nanoTime();
831	+	millis = nanos / (1000 * 1000);
832	+	} while (nanos >= 0L);
833	+	}
834	+
835	+	/**
836	+	* Allows use of try-with-resources with per-test thread pools.
837	+	*/
838	+	class PoolCleaner implements AutoCloseable {
839	+	private final ExecutorService pool;
840	+	public PoolCleaner(ExecutorService pool) { this.pool = pool; }
841	+	public void close() { joinPool(pool); }
842	+	}
843	+
844	+	/**
845	+	* An extension of PoolCleaner that has an action to release the pool.
846	+	*/
847	+	class PoolCleanerWithReleaser extends PoolCleaner {
848	+	private final Runnable releaser;
849	+	public PoolCleanerWithReleaser(ExecutorService pool, Runnable releaser) {
850	+	super(pool);
851	+	this.releaser = releaser;
852	+	}
853	+	public void close() {
854	+	try {
855	+	releaser.run();
856	+	} finally {
857	+	super.close();
858	+	}
859	+	}
860	+	}
861	+
862	+	PoolCleaner cleaner(ExecutorService pool) {
863	+	return new PoolCleaner(pool);
864	+	}
865	+
866	+	PoolCleaner cleaner(ExecutorService pool, Runnable releaser) {
867	+	return new PoolCleanerWithReleaser(pool, releaser);
868	+	}
869	+
870	+	PoolCleaner cleaner(ExecutorService pool, CountDownLatch latch) {
871	+	return new PoolCleanerWithReleaser(pool, releaser(latch));
872	+	}
873	+
874	+	Runnable releaser(final CountDownLatch latch) {
875	+	return new Runnable() { public void run() {
876	+	do { latch.countDown(); }
877	+	while (latch.getCount() > 0);
878	+	}};
879	+	}
880	+
881	+	/**
882	+	* Waits out termination of a thread pool or fails doing so.
883	+	*/
884	+	void joinPool(ExecutorService pool) {
885	+	try {
886	+	pool.shutdown();
887	+	if (!pool.awaitTermination(2 * LONG_DELAY_MS, MILLISECONDS)) {
888	+	try {
889	+	threadFail("ExecutorService " + pool +
890	+	" did not terminate in a timely manner");
891	+	} finally {
892	+	// last resort, for the benefit of subsequent tests
893	+	pool.shutdownNow();
894	+	pool.awaitTermination(MEDIUM_DELAY_MS, MILLISECONDS);
895	+	}
896	+	}
897	+	} catch (SecurityException ok) {
898	+	// Allowed in case test doesn't have privs
899	+	} catch (InterruptedException fail) {
900	+	threadFail("Unexpected InterruptedException");
901	+	}
902	+	}
903	+
904	+	/** Like Runnable, but with the freedom to throw anything */
905	+	interface Action { public void run() throws Throwable; }
906	+
907	+	/**
908	+	* Runs all the given actions in parallel, failing if any fail.
909	+	* Useful for running multiple variants of tests that are
910	+	* necessarily individually slow because they must block.
911	+	*/
912	+	void testInParallel(Action ... actions) {
913	+	ExecutorService pool = Executors.newCachedThreadPool();
914	+	try (PoolCleaner cleaner = cleaner(pool)) {
915	+	ArrayList<Future<?>> futures = new ArrayList<>(actions.length);
916	+	for (final Action action : actions)
917	+	futures.add(pool.submit(new CheckedRunnable() {
918	+	public void realRun() throws Throwable { action.run();}}));
919	+	for (Future<?> future : futures)
920	+	try {
921	+	assertNull(future.get(LONG_DELAY_MS, MILLISECONDS));
922	+	} catch (ExecutionException ex) {
923	+	threadUnexpectedException(ex.getCause());
924	+	} catch (Exception ex) {
925	+	threadUnexpectedException(ex);
926	+	}
927	+	}
928	+	}
929	+
930	+	/**
931	+	* A debugging tool to print stack traces of most threads, as jstack does.
932	+	* Uninteresting threads are filtered out.
933	+	*/
934	+	static void dumpTestThreads() {
935	+	ThreadMXBean threadMXBean = ManagementFactory.getThreadMXBean();
936	+	System.err.println("------ stacktrace dump start ------");
937	+	for (ThreadInfo info : threadMXBean.dumpAllThreads(true, true)) {
938	+	String name = info.getThreadName();
939	+	if ("Signal Dispatcher".equals(name))
940	+	continue;
941	+	if ("Reference Handler".equals(name)
942	+	&& info.getLockName().startsWith("java.lang.ref.Reference$Lock"))
943	+	continue;
944	+	if ("Finalizer".equals(name)
945	+	&& info.getLockName().startsWith("java.lang.ref.ReferenceQueue$Lock"))
946	+	continue;
947	+	if ("checkForWedgedTest".equals(name))
948	+	continue;
949	+	System.err.print(info);
950		}
951	+	System.err.println("------ stacktrace dump end ------");
952	+	}
953	+
954	+	/**
955	+	* Checks that thread does not terminate within the default
956	+	* millisecond delay of {@code timeoutMillis()}.
957	+	*/
958	+	void assertThreadStaysAlive(Thread thread) {
959	+	assertThreadStaysAlive(thread, timeoutMillis());
960		}
961
962		/**
963	<	* Wait out termination of a thread pool or fail doing so
963	>	* Checks that thread does not terminate within the given millisecond delay.
964		*/
965	<	public void joinPool(ExecutorService exec) {
965	>	void assertThreadStaysAlive(Thread thread, long millis) {
966		try {
967	<	exec.shutdown();
968	<	assertTrue(exec.awaitTermination(LONG_DELAY_MS, TimeUnit.MILLISECONDS));
969	<	} catch(InterruptedException ie) {
970	<	fail("unexpected exception");
967	>	// No need to optimize the failing case via Thread.join.
968	>	delay(millis);
969	>	assertTrue(thread.isAlive());
970	>	} catch (InterruptedException fail) {
971	>	threadFail("Unexpected InterruptedException");
972		}
973		}
974
975	+	/**
976	+	* Checks that the threads do not terminate within the default
977	+	* millisecond delay of {@code timeoutMillis()}.
978	+	*/
979	+	void assertThreadsStayAlive(Thread... threads) {
980	+	assertThreadsStayAlive(timeoutMillis(), threads);
981	+	}
982
983	+	/**
984	+	* Checks that the threads do not terminate within the given millisecond delay.
985	+	*/
986	+	void assertThreadsStayAlive(long millis, Thread... threads) {
987	+	try {
988	+	// No need to optimize the failing case via Thread.join.
989	+	delay(millis);
990	+	for (Thread thread : threads)
991	+	assertTrue(thread.isAlive());
992	+	} catch (InterruptedException fail) {
993	+	threadFail("Unexpected InterruptedException");
994	+	}
995	+	}
996	+
997	+	/**
998	+	* Checks that future.get times out, with the default timeout of
999	+	* {@code timeoutMillis()}.
1000	+	*/
1001	+	void assertFutureTimesOut(Future future) {
1002	+	assertFutureTimesOut(future, timeoutMillis());
1003	+	}
1004	+
1005	+	/**
1006	+	* Checks that future.get times out, with the given millisecond timeout.
1007	+	*/
1008	+	void assertFutureTimesOut(Future future, long timeoutMillis) {
1009	+	long startTime = System.nanoTime();
1010	+	try {
1011	+	future.get(timeoutMillis, MILLISECONDS);
1012	+	shouldThrow();
1013	+	} catch (TimeoutException success) {
1014	+	} catch (Exception fail) {
1015	+	threadUnexpectedException(fail);
1016	+	} finally { future.cancel(true); }
1017	+	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
1018	+	}
1019	+
1020	+	/**
1021	+	* Fails with message "should throw exception".
1022	+	*/
1023	+	public void shouldThrow() {
1024	+	fail("Should throw exception");
1025	+	}
1026	+
1027	+	/**
1028	+	* Fails with message "should throw " + exceptionName.
1029	+	*/
1030	+	public void shouldThrow(String exceptionName) {
1031	+	fail("Should throw " + exceptionName);
1032	+	}
1033
1034		/**
1035		* The number of elements to place in collections, arrays, etc.
#	Line 155 | Line 1038 | public class JSR166TestCase extends Test
1038
1039		// Some convenient Integer constants
1040
1041	<	public static final Integer zero = new Integer(0);
1042	<	public static final Integer one = new Integer(1);
1043	<	public static final Integer two = new Integer(2);
1044	<	public static final Integer three  = new Integer(3);
1041	>	public static final Integer zero  = new Integer(0);
1042	>	public static final Integer one   = new Integer(1);
1043	>	public static final Integer two   = new Integer(2);
1044	>	public static final Integer three = new Integer(3);
1045		public static final Integer four  = new Integer(4);
1046		public static final Integer five  = new Integer(5);
1047	<	public static final Integer six = new Integer(6);
1047	>	public static final Integer six   = new Integer(6);
1048		public static final Integer seven = new Integer(7);
1049		public static final Integer eight = new Integer(8);
1050	<	public static final Integer nine = new Integer(9);
1050	>	public static final Integer nine  = new Integer(9);
1051		public static final Integer m1  = new Integer(-1);
1052		public static final Integer m2  = new Integer(-2);
1053		public static final Integer m3  = new Integer(-3);
1054	<	public static final Integer m4 = new Integer(-4);
1055	<	public static final Integer m5 = new Integer(-5);
1054	>	public static final Integer m4  = new Integer(-4);
1055	>	public static final Integer m5  = new Integer(-5);
1056	>	public static final Integer m6  = new Integer(-6);
1057		public static final Integer m10 = new Integer(-10);
1058
1059	+	/**
1060	+	* Runs Runnable r with a security policy that permits precisely
1061	+	* the specified permissions.  If there is no current security
1062	+	* manager, the runnable is run twice, both with and without a
1063	+	* security manager.  We require that any security manager permit
1064	+	* getPolicy/setPolicy.
1065	+	*/
1066	+	public void runWithPermissions(Runnable r, Permission... permissions) {
1067	+	SecurityManager sm = System.getSecurityManager();
1068	+	if (sm == null) {
1069	+	r.run();
1070	+	}
1071	+	runWithSecurityManagerWithPermissions(r, permissions);
1072	+	}
1073
1074	<	// Some convenient Runnable classes
1074	>	/**
1075	>	* Runs Runnable r with a security policy that permits precisely
1076	>	* the specified permissions.  If there is no current security
1077	>	* manager, a temporary one is set for the duration of the
1078	>	* Runnable.  We require that any security manager permit
1079	>	* getPolicy/setPolicy.
1080	>	*/
1081	>	public void runWithSecurityManagerWithPermissions(Runnable r,
1082	>	Permission... permissions) {
1083	>	SecurityManager sm = System.getSecurityManager();
1084	>	if (sm == null) {
1085	>	Policy savedPolicy = Policy.getPolicy();
1086	>	try {
1087	>	Policy.setPolicy(permissivePolicy());
1088	>	System.setSecurityManager(new SecurityManager());
1089	>	runWithSecurityManagerWithPermissions(r, permissions);
1090	>	} finally {
1091	>	System.setSecurityManager(null);
1092	>	Policy.setPolicy(savedPolicy);
1093	>	}
1094	>	} else {
1095	>	Policy savedPolicy = Policy.getPolicy();
1096	>	AdjustablePolicy policy = new AdjustablePolicy(permissions);
1097	>	Policy.setPolicy(policy);
1098
1099	<	public static class NoOpRunnable implements Runnable {
1100	<	public void run() {}
1099	>	try {
1100	>	r.run();
1101	>	} finally {
1102	>	policy.addPermission(new SecurityPermission("setPolicy"));
1103	>	Policy.setPolicy(savedPolicy);
1104	>	}
1105	>	}
1106		}
1107
1108	<	public static class NoOpCallable implements Callable {
1109	<	public Object call() { return Boolean.TRUE; }
1108	>	/**
1109	>	* Runs a runnable without any permissions.
1110	>	*/
1111	>	public void runWithoutPermissions(Runnable r) {
1112	>	runWithPermissions(r);
1113		}
1114
1115	<	public class ShortRunnable implements Runnable {
1116	<	public void run() {
1117	<	try {
1118	<	Thread.sleep(SHORT_DELAY_MS);
1115	>	/**
1116	>	* A security policy where new permissions can be dynamically added
1117	>	* or all cleared.
1118	>	*/
1119	>	public static class AdjustablePolicy extends java.security.Policy {
1120	>	Permissions perms = new Permissions();
1121	>	AdjustablePolicy(Permission... permissions) {
1122	>	for (Permission permission : permissions)
1123	>	perms.add(permission);
1124	>	}
1125	>	void addPermission(Permission perm) { perms.add(perm); }
1126	>	void clearPermissions() { perms = new Permissions(); }
1127	>	public PermissionCollection getPermissions(CodeSource cs) {
1128	>	return perms;
1129	>	}
1130	>	public PermissionCollection getPermissions(ProtectionDomain pd) {
1131	>	return perms;
1132	>	}
1133	>	public boolean implies(ProtectionDomain pd, Permission p) {
1134	>	return perms.implies(p);
1135	>	}
1136	>	public void refresh() {}
1137	>	public String toString() {
1138	>	List<Permission> ps = new ArrayList<Permission>();
1139	>	for (Enumeration<Permission> e = perms.elements(); e.hasMoreElements();)
1140	>	ps.add(e.nextElement());
1141	>	return "AdjustablePolicy with permissions " + ps;
1142	>	}
1143	>	}
1144	>
1145	>	/**
1146	>	* Returns a policy containing all the permissions we ever need.
1147	>	*/
1148	>	public static Policy permissivePolicy() {
1149	>	return new AdjustablePolicy
1150	>	// Permissions j.u.c. needs directly
1151	>	(new RuntimePermission("modifyThread"),
1152	>	new RuntimePermission("getClassLoader"),
1153	>	new RuntimePermission("setContextClassLoader"),
1154	>	// Permissions needed to change permissions!
1155	>	new SecurityPermission("getPolicy"),
1156	>	new SecurityPermission("setPolicy"),
1157	>	new RuntimePermission("setSecurityManager"),
1158	>	// Permissions needed by the junit test harness
1159	>	new RuntimePermission("accessDeclaredMembers"),
1160	>	new PropertyPermission("*", "read"),
1161	>	new java.io.FilePermission("<<ALL FILES>>", "read"));
1162	>	}
1163	>
1164	>	/**
1165	>	* Sleeps until the given time has elapsed.
1166	>	* Throws AssertionFailedError if interrupted.
1167	>	*/
1168	>	void sleep(long millis) {
1169	>	try {
1170	>	delay(millis);
1171	>	} catch (InterruptedException fail) {
1172	>	AssertionFailedError afe =
1173	>	new AssertionFailedError("Unexpected InterruptedException");
1174	>	afe.initCause(fail);
1175	>	throw afe;
1176	>	}
1177	>	}
1178	>
1179	>	/**
1180	>	* Spin-waits up to the specified number of milliseconds for the given
1181	>	* thread to enter a wait state: BLOCKED, WAITING, or TIMED_WAITING.
1182	>	*/
1183	>	void waitForThreadToEnterWaitState(Thread thread, long timeoutMillis) {
1184	>	long startTime = System.nanoTime();
1185	>	for (;;) {
1186	>	Thread.State s = thread.getState();
1187	>	if (s == Thread.State.BLOCKED ||
1188	>	s == Thread.State.WAITING ||
1189	>	s == Thread.State.TIMED_WAITING)
1190	>	return;
1191	>	else if (s == Thread.State.TERMINATED)
1192	>	fail("Unexpected thread termination");
1193	>	else if (millisElapsedSince(startTime) > timeoutMillis) {
1194	>	threadAssertTrue(thread.isAlive());
1195	>	return;
1196		}
1197	<	catch(Exception e) {
1198	<	threadFail("unexpectedException");
1197	>	Thread.yield();
1198	>	}
1199	>	}
1200	>
1201	>	/**
1202	>	* Waits up to LONG_DELAY_MS for the given thread to enter a wait
1203	>	* state: BLOCKED, WAITING, or TIMED_WAITING.
1204	>	*/
1205	>	void waitForThreadToEnterWaitState(Thread thread) {
1206	>	waitForThreadToEnterWaitState(thread, LONG_DELAY_MS);
1207	>	}
1208	>
1209	>	/**
1210	>	* Returns the number of milliseconds since time given by
1211	>	* startNanoTime, which must have been previously returned from a
1212	>	* call to {@link System#nanoTime()}.
1213	>	*/
1214	>	static long millisElapsedSince(long startNanoTime) {
1215	>	return NANOSECONDS.toMillis(System.nanoTime() - startNanoTime);
1216	>	}
1217	>
1218	>	//     void assertTerminatesPromptly(long timeoutMillis, Runnable r) {
1219	>	//         long startTime = System.nanoTime();
1220	>	//         try {
1221	>	//             r.run();
1222	>	//         } catch (Throwable fail) { threadUnexpectedException(fail); }
1223	>	//         if (millisElapsedSince(startTime) > timeoutMillis/2)
1224	>	//             throw new AssertionFailedError("did not return promptly");
1225	>	//     }
1226	>
1227	>	//     void assertTerminatesPromptly(Runnable r) {
1228	>	//         assertTerminatesPromptly(LONG_DELAY_MS/2, r);
1229	>	//     }
1230	>
1231	>	/**
1232	>	* Checks that timed f.get() returns the expected value, and does not
1233	>	* wait for the timeout to elapse before returning.
1234	>	*/
1235	>	<T> void checkTimedGet(Future<T> f, T expectedValue, long timeoutMillis) {
1236	>	long startTime = System.nanoTime();
1237	>	try {
1238	>	assertEquals(expectedValue, f.get(timeoutMillis, MILLISECONDS));
1239	>	} catch (Throwable fail) { threadUnexpectedException(fail); }
1240	>	if (millisElapsedSince(startTime) > timeoutMillis/2)
1241	>	throw new AssertionFailedError("timed get did not return promptly");
1242	>	}
1243	>
1244	>	<T> void checkTimedGet(Future<T> f, T expectedValue) {
1245	>	checkTimedGet(f, expectedValue, LONG_DELAY_MS);
1246	>	}
1247	>
1248	>	/**
1249	>	* Returns a new started daemon Thread running the given runnable.
1250	>	*/
1251	>	Thread newStartedThread(Runnable runnable) {
1252	>	Thread t = new Thread(runnable);
1253	>	t.setDaemon(true);
1254	>	t.start();
1255	>	return t;
1256	>	}
1257	>
1258	>	/**
1259	>	* Waits for the specified time (in milliseconds) for the thread
1260	>	* to terminate (using {@link Thread#join(long)}), else interrupts
1261	>	* the thread (in the hope that it may terminate later) and fails.
1262	>	*/
1263	>	void awaitTermination(Thread t, long timeoutMillis) {
1264	>	try {
1265	>	t.join(timeoutMillis);
1266	>	} catch (InterruptedException fail) {
1267	>	threadUnexpectedException(fail);
1268	>	} finally {
1269	>	if (t.getState() != Thread.State.TERMINATED) {
1270	>	t.interrupt();
1271	>	threadFail("timed out waiting for thread to terminate");
1272		}
1273		}
1274		}
1275
1276	<	public class ShortInterruptedRunnable implements Runnable {
1277	<	public void run() {
1276	>	/**
1277	>	* Waits for LONG_DELAY_MS milliseconds for the thread to
1278	>	* terminate (using {@link Thread#join(long)}), else interrupts
1279	>	* the thread (in the hope that it may terminate later) and fails.
1280	>	*/
1281	>	void awaitTermination(Thread t) {
1282	>	awaitTermination(t, LONG_DELAY_MS);
1283	>	}
1284	>
1285	>	// Some convenient Runnable classes
1286	>
1287	>	public abstract class CheckedRunnable implements Runnable {
1288	>	protected abstract void realRun() throws Throwable;
1289	>
1290	>	public final void run() {
1291		try {
1292	<	Thread.sleep(SHORT_DELAY_MS);
1293	<	threadFail("should throw IE");
1292	>	realRun();
1293	>	} catch (Throwable fail) {
1294	>	threadUnexpectedException(fail);
1295		}
1296	<	catch(InterruptedException success) {
1296	>	}
1297	>	}
1298	>
1299	>	public abstract class RunnableShouldThrow implements Runnable {
1300	>	protected abstract void realRun() throws Throwable;
1301	>
1302	>	final Class<?> exceptionClass;
1303	>
1304	>	<T extends Throwable> RunnableShouldThrow(Class<T> exceptionClass) {
1305	>	this.exceptionClass = exceptionClass;
1306	>	}
1307	>
1308	>	public final void run() {
1309	>	try {
1310	>	realRun();
1311	>	threadShouldThrow(exceptionClass.getSimpleName());
1312	>	} catch (Throwable t) {
1313	>	if (! exceptionClass.isInstance(t))
1314	>	threadUnexpectedException(t);
1315		}
1316		}
1317		}
1318
1319	<	public class SmallRunnable implements Runnable {
1320	<	public void run() {
1319	>	public abstract class ThreadShouldThrow extends Thread {
1320	>	protected abstract void realRun() throws Throwable;
1321	>
1322	>	final Class<?> exceptionClass;
1323	>
1324	>	<T extends Throwable> ThreadShouldThrow(Class<T> exceptionClass) {
1325	>	this.exceptionClass = exceptionClass;
1326	>	}
1327	>
1328	>	public final void run() {
1329		try {
1330	<	Thread.sleep(SMALL_DELAY_MS);
1330	>	realRun();
1331	>	threadShouldThrow(exceptionClass.getSimpleName());
1332	>	} catch (Throwable t) {
1333	>	if (! exceptionClass.isInstance(t))
1334	>	threadUnexpectedException(t);
1335		}
1336	<	catch(Exception e) {
1337	<	threadFail("unexpectedException");
1336	>	}
1337	>	}
1338	>
1339	>	public abstract class CheckedInterruptedRunnable implements Runnable {
1340	>	protected abstract void realRun() throws Throwable;
1341	>
1342	>	public final void run() {
1343	>	try {
1344	>	realRun();
1345	>	threadShouldThrow("InterruptedException");
1346	>	} catch (InterruptedException success) {
1347	>	threadAssertFalse(Thread.interrupted());
1348	>	} catch (Throwable fail) {
1349	>	threadUnexpectedException(fail);
1350		}
1351		}
1352		}
1353
1354	<	public class SmallCallable implements Callable {
1355	<	public Object call() {
1354	>	public abstract class CheckedCallable<T> implements Callable<T> {
1355	>	protected abstract T realCall() throws Throwable;
1356	>
1357	>	public final T call() {
1358		try {
1359	<	Thread.sleep(SMALL_DELAY_MS);
1359	>	return realCall();
1360	>	} catch (Throwable fail) {
1361	>	threadUnexpectedException(fail);
1362	>	return null;
1363		}
1364	<	catch(Exception e) {
1365	<	threadFail("unexpectedException");
1364	>	}
1365	>	}
1366	>
1367	>	public abstract class CheckedInterruptedCallable<T>
1368	>	implements Callable<T> {
1369	>	protected abstract T realCall() throws Throwable;
1370	>
1371	>	public final T call() {
1372	>	try {
1373	>	T result = realCall();
1374	>	threadShouldThrow("InterruptedException");
1375	>	return result;
1376	>	} catch (InterruptedException success) {
1377	>	threadAssertFalse(Thread.interrupted());
1378	>	} catch (Throwable fail) {
1379	>	threadUnexpectedException(fail);
1380		}
1381	+	return null;
1382	+	}
1383	+	}
1384	+
1385	+	public static class NoOpRunnable implements Runnable {
1386	+	public void run() {}
1387	+	}
1388	+
1389	+	public static class NoOpCallable implements Callable {
1390	+	public Object call() { return Boolean.TRUE; }
1391	+	}
1392	+
1393	+	public static final String TEST_STRING = "a test string";
1394	+
1395	+	public static class StringTask implements Callable<String> {
1396	+	final String value;
1397	+	public StringTask() { this(TEST_STRING); }
1398	+	public StringTask(String value) { this.value = value; }
1399	+	public String call() { return value; }
1400	+	}
1401	+
1402	+	public Callable<String> latchAwaitingStringTask(final CountDownLatch latch) {
1403	+	return new CheckedCallable<String>() {
1404	+	protected String realCall() {
1405	+	try {
1406	+	latch.await();
1407	+	} catch (InterruptedException quittingTime) {}
1408	+	return TEST_STRING;
1409	+	}};
1410	+	}
1411	+
1412	+	public Runnable countDowner(final CountDownLatch latch) {
1413	+	return new CheckedRunnable() {
1414	+	public void realRun() throws InterruptedException {
1415	+	latch.countDown();
1416	+	}};
1417	+	}
1418	+
1419	+	class LatchAwaiter extends CheckedRunnable {
1420	+	static final int NEW = 0;
1421	+	static final int RUNNING = 1;
1422	+	static final int DONE = 2;
1423	+	final CountDownLatch latch;
1424	+	int state = NEW;
1425	+	LatchAwaiter(CountDownLatch latch) { this.latch = latch; }
1426	+	public void realRun() throws InterruptedException {
1427	+	state = 1;
1428	+	await(latch);
1429	+	state = 2;
1430	+	}
1431	+	}
1432	+
1433	+	public LatchAwaiter awaiter(CountDownLatch latch) {
1434	+	return new LatchAwaiter(latch);
1435	+	}
1436	+
1437	+	public void await(CountDownLatch latch) {
1438	+	try {
1439	+	if (!latch.await(LONG_DELAY_MS, MILLISECONDS))
1440	+	fail("timed out waiting for CountDownLatch for "
1441	+	+ (LONG_DELAY_MS/1000) + " sec");
1442	+	} catch (Throwable fail) {
1443	+	threadUnexpectedException(fail);
1444	+	}
1445	+	}
1446	+
1447	+	public void await(Semaphore semaphore) {
1448	+	try {
1449	+	if (!semaphore.tryAcquire(LONG_DELAY_MS, MILLISECONDS))
1450	+	fail("timed out waiting for Semaphore for "
1451	+	+ (LONG_DELAY_MS/1000) + " sec");
1452	+	} catch (Throwable fail) {
1453	+	threadUnexpectedException(fail);
1454	+	}
1455	+	}
1456	+
1457	+	//     /**
1458	+	//      * Spin-waits up to LONG_DELAY_MS until flag becomes true.
1459	+	//      */
1460	+	//     public void await(AtomicBoolean flag) {
1461	+	//         await(flag, LONG_DELAY_MS);
1462	+	//     }
1463	+
1464	+	//     /**
1465	+	//      * Spin-waits up to the specified timeout until flag becomes true.
1466	+	//      */
1467	+	//     public void await(AtomicBoolean flag, long timeoutMillis) {
1468	+	//         long startTime = System.nanoTime();
1469	+	//         while (!flag.get()) {
1470	+	//             if (millisElapsedSince(startTime) > timeoutMillis)
1471	+	//                 throw new AssertionFailedError("timed out");
1472	+	//             Thread.yield();
1473	+	//         }
1474	+	//     }
1475	+
1476	+	public static class NPETask implements Callable<String> {
1477	+	public String call() { throw new NullPointerException(); }
1478	+	}
1479	+
1480	+	public static class CallableOne implements Callable<Integer> {
1481	+	public Integer call() { return one; }
1482	+	}
1483	+
1484	+	public class ShortRunnable extends CheckedRunnable {
1485	+	protected void realRun() throws Throwable {
1486	+	delay(SHORT_DELAY_MS);
1487	+	}
1488	+	}
1489	+
1490	+	public class ShortInterruptedRunnable extends CheckedInterruptedRunnable {
1491	+	protected void realRun() throws InterruptedException {
1492	+	delay(SHORT_DELAY_MS);
1493	+	}
1494	+	}
1495	+
1496	+	public class SmallRunnable extends CheckedRunnable {
1497	+	protected void realRun() throws Throwable {
1498	+	delay(SMALL_DELAY_MS);
1499	+	}
1500	+	}
1501	+
1502	+	public class SmallPossiblyInterruptedRunnable extends CheckedRunnable {
1503	+	protected void realRun() {
1504	+	try {
1505	+	delay(SMALL_DELAY_MS);
1506	+	} catch (InterruptedException ok) {}
1507	+	}
1508	+	}
1509	+
1510	+	public class SmallCallable extends CheckedCallable {
1511	+	protected Object realCall() throws InterruptedException {
1512	+	delay(SMALL_DELAY_MS);
1513		return Boolean.TRUE;
1514		}
1515		}
1516
1517	<	public class SmallInterruptedRunnable implements Runnable {
1517	>	public class MediumRunnable extends CheckedRunnable {
1518	>	protected void realRun() throws Throwable {
1519	>	delay(MEDIUM_DELAY_MS);
1520	>	}
1521	>	}
1522	>
1523	>	public class MediumInterruptedRunnable extends CheckedInterruptedRunnable {
1524	>	protected void realRun() throws InterruptedException {
1525	>	delay(MEDIUM_DELAY_MS);
1526	>	}
1527	>	}
1528	>
1529	>	public Runnable possiblyInterruptedRunnable(final long timeoutMillis) {
1530	>	return new CheckedRunnable() {
1531	>	protected void realRun() {
1532	>	try {
1533	>	delay(timeoutMillis);
1534	>	} catch (InterruptedException ok) {}
1535	>	}};
1536	>	}
1537	>
1538	>	public class MediumPossiblyInterruptedRunnable extends CheckedRunnable {
1539	>	protected void realRun() {
1540	>	try {
1541	>	delay(MEDIUM_DELAY_MS);
1542	>	} catch (InterruptedException ok) {}
1543	>	}
1544	>	}
1545	>
1546	>	public class LongPossiblyInterruptedRunnable extends CheckedRunnable {
1547	>	protected void realRun() {
1548	>	try {
1549	>	delay(LONG_DELAY_MS);
1550	>	} catch (InterruptedException ok) {}
1551	>	}
1552	>	}
1553	>
1554	>	/**
1555	>	* For use as ThreadFactory in constructors
1556	>	*/
1557	>	public static class SimpleThreadFactory implements ThreadFactory {
1558	>	public Thread newThread(Runnable r) {
1559	>	return new Thread(r);
1560	>	}
1561	>	}
1562	>
1563	>	public interface TrackedRunnable extends Runnable {
1564	>	boolean isDone();
1565	>	}
1566	>
1567	>	public static TrackedRunnable trackedRunnable(final long timeoutMillis) {
1568	>	return new TrackedRunnable() {
1569	>	private volatile boolean done = false;
1570	>	public boolean isDone() { return done; }
1571	>	public void run() {
1572	>	try {
1573	>	delay(timeoutMillis);
1574	>	done = true;
1575	>	} catch (InterruptedException ok) {}
1576	>	}
1577	>	};
1578	>	}
1579	>
1580	>	public static class TrackedShortRunnable implements Runnable {
1581	>	public volatile boolean done = false;
1582		public void run() {
1583		try {
1584	<	Thread.sleep(SMALL_DELAY_MS);
1585	<	threadFail("should throw IE");
1586	<	}
237	<	catch(InterruptedException success) {
238	<	}
1584	>	delay(SHORT_DELAY_MS);
1585	>	done = true;
1586	>	} catch (InterruptedException ok) {}
1587		}
1588		}
1589
1590	+	public static class TrackedSmallRunnable implements Runnable {
1591	+	public volatile boolean done = false;
1592	+	public void run() {
1593	+	try {
1594	+	delay(SMALL_DELAY_MS);
1595	+	done = true;
1596	+	} catch (InterruptedException ok) {}
1597	+	}
1598	+	}
1599
1600	<	public class MediumRunnable implements Runnable {
1600	>	public static class TrackedMediumRunnable implements Runnable {
1601	>	public volatile boolean done = false;
1602		public void run() {
1603		try {
1604	<	Thread.sleep(MEDIUM_DELAY_MS);
1605	<	}
1606	<	catch(Exception e) {
249	<	threadFail("unexpectedException");
250	<	}
1604	>	delay(MEDIUM_DELAY_MS);
1605	>	done = true;
1606	>	} catch (InterruptedException ok) {}
1607		}
1608		}
1609
1610	<	public class MediumInterruptedRunnable implements Runnable {
1610	>	public static class TrackedLongRunnable implements Runnable {
1611	>	public volatile boolean done = false;
1612		public void run() {
1613		try {
1614	<	Thread.sleep(MEDIUM_DELAY_MS);
1615	<	threadFail("should throw IE");
1614	>	delay(LONG_DELAY_MS);
1615	>	done = true;
1616	>	} catch (InterruptedException ok) {}
1617	>	}
1618	>	}
1619	>
1620	>	public static class TrackedNoOpRunnable implements Runnable {
1621	>	public volatile boolean done = false;
1622	>	public void run() {
1623	>	done = true;
1624	>	}
1625	>	}
1626	>
1627	>	public static class TrackedCallable implements Callable {
1628	>	public volatile boolean done = false;
1629	>	public Object call() {
1630	>	try {
1631	>	delay(SMALL_DELAY_MS);
1632	>	done = true;
1633	>	} catch (InterruptedException ok) {}
1634	>	return Boolean.TRUE;
1635	>	}
1636	>	}
1637	>
1638	>	/**
1639	>	* Analog of CheckedRunnable for RecursiveAction
1640	>	*/
1641	>	public abstract class CheckedRecursiveAction extends RecursiveAction {
1642	>	protected abstract void realCompute() throws Throwable;
1643	>
1644	>	@Override protected final void compute() {
1645	>	try {
1646	>	realCompute();
1647	>	} catch (Throwable fail) {
1648	>	threadUnexpectedException(fail);
1649		}
1650	<	catch(InterruptedException success) {
1650	>	}
1651	>	}
1652	>
1653	>	/**
1654	>	* Analog of CheckedCallable for RecursiveTask
1655	>	*/
1656	>	public abstract class CheckedRecursiveTask<T> extends RecursiveTask<T> {
1657	>	protected abstract T realCompute() throws Throwable;
1658	>
1659	>	@Override protected final T compute() {
1660	>	try {
1661	>	return realCompute();
1662	>	} catch (Throwable fail) {
1663	>	threadUnexpectedException(fail);
1664	>	return null;
1665		}
1666		}
1667		}
1668
1669	<	public class MediumPossiblyInterruptedRunnable implements Runnable {
1670	<	public void run() {
1669	>	/**
1670	>	* For use as RejectedExecutionHandler in constructors
1671	>	*/
1672	>	public static class NoOpREHandler implements RejectedExecutionHandler {
1673	>	public void rejectedExecution(Runnable r,
1674	>	ThreadPoolExecutor executor) {}
1675	>	}
1676	>
1677	>	/**
1678	>	* A CyclicBarrier that uses timed await and fails with
1679	>	* AssertionFailedErrors instead of throwing checked exceptions.
1680	>	*/
1681	>	public class CheckedBarrier extends CyclicBarrier {
1682	>	public CheckedBarrier(int parties) { super(parties); }
1683	>
1684	>	public int await() {
1685		try {
1686	<	Thread.sleep(MEDIUM_DELAY_MS);
1686	>	return super.await(2 * LONG_DELAY_MS, MILLISECONDS);
1687	>	} catch (TimeoutException timedOut) {
1688	>	throw new AssertionFailedError("timed out");
1689	>	} catch (Exception fail) {
1690	>	AssertionFailedError afe =
1691	>	new AssertionFailedError("Unexpected exception: " + fail);
1692	>	afe.initCause(fail);
1693	>	throw afe;
1694		}
1695	<	catch(InterruptedException success) {
1695	>	}
1696	>	}
1697	>
1698	>	void checkEmpty(BlockingQueue q) {
1699	>	try {
1700	>	assertTrue(q.isEmpty());
1701	>	assertEquals(0, q.size());
1702	>	assertNull(q.peek());
1703	>	assertNull(q.poll());
1704	>	assertNull(q.poll(0, MILLISECONDS));
1705	>	assertEquals(q.toString(), "[]");
1706	>	assertTrue(Arrays.equals(q.toArray(), new Object[0]));
1707	>	assertFalse(q.iterator().hasNext());
1708	>	try {
1709	>	q.element();
1710	>	shouldThrow();
1711	>	} catch (NoSuchElementException success) {}
1712	>	try {
1713	>	q.iterator().next();
1714	>	shouldThrow();
1715	>	} catch (NoSuchElementException success) {}
1716	>	try {
1717	>	q.remove();
1718	>	shouldThrow();
1719	>	} catch (NoSuchElementException success) {}
1720	>	} catch (InterruptedException fail) { threadUnexpectedException(fail); }
1721	>	}
1722	>
1723	>	void assertSerialEquals(Object x, Object y) {
1724	>	assertTrue(Arrays.equals(serialBytes(x), serialBytes(y)));
1725	>	}
1726	>
1727	>	void assertNotSerialEquals(Object x, Object y) {
1728	>	assertFalse(Arrays.equals(serialBytes(x), serialBytes(y)));
1729	>	}
1730	>
1731	>	byte[] serialBytes(Object o) {
1732	>	try {
1733	>	ByteArrayOutputStream bos = new ByteArrayOutputStream();
1734	>	ObjectOutputStream oos = new ObjectOutputStream(bos);
1735	>	oos.writeObject(o);
1736	>	oos.flush();
1737	>	oos.close();
1738	>	return bos.toByteArray();
1739	>	} catch (Throwable fail) {
1740	>	threadUnexpectedException(fail);
1741	>	return new byte[0];
1742	>	}
1743	>	}
1744	>
1745	>	@SuppressWarnings("unchecked")
1746	>	<T> T serialClone(T o) {
1747	>	try {
1748	>	ObjectInputStream ois = new ObjectInputStream
1749	>	(new ByteArrayInputStream(serialBytes(o)));
1750	>	T clone = (T) ois.readObject();
1751	>	assertSame(o.getClass(), clone.getClass());
1752	>	return clone;
1753	>	} catch (Throwable fail) {
1754	>	threadUnexpectedException(fail);
1755	>	return null;
1756	>	}
1757	>	}
1758	>
1759	>	public void assertThrows(Class<? extends Throwable> expectedExceptionClass,
1760	>	Runnable... throwingActions) {
1761	>	for (Runnable throwingAction : throwingActions) {
1762	>	boolean threw = false;
1763	>	try { throwingAction.run(); }
1764	>	catch (Throwable t) {
1765	>	threw = true;
1766	>	if (!expectedExceptionClass.isInstance(t)) {
1767	>	AssertionFailedError afe =
1768	>	new AssertionFailedError
1769	>	("Expected " + expectedExceptionClass.getName() +
1770	>	", got " + t.getClass().getName());
1771	>	afe.initCause(t);
1772	>	threadUnexpectedException(afe);
1773	>	}
1774		}
1775	+	if (!threw)
1776	+	shouldThrow(expectedExceptionClass.getName());
1777		}
1778		}
1779	<
1779	>
1780	>	public void assertIteratorExhausted(Iterator<?> it) {
1781	>	try {
1782	>	it.next();
1783	>	shouldThrow();
1784	>	} catch (NoSuchElementException success) {}
1785	>	assertFalse(it.hasNext());
1786	>	}
1787		}

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