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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 1.184 by jsr166, Wed Feb 10 00:05:20 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	>	*/
16
17	+	import static java.util.concurrent.TimeUnit.MILLISECONDS;
18	+	import static java.util.concurrent.TimeUnit.MINUTES;
19	+	import static java.util.concurrent.TimeUnit.NANOSECONDS;
20	+
21	+	import java.io.ByteArrayInputStream;
22	+	import java.io.ByteArrayOutputStream;
23	+	import java.io.ObjectInputStream;
24	+	import java.io.ObjectOutputStream;
25	+	import java.lang.management.ManagementFactory;
26	+	import java.lang.management.ThreadInfo;
27	+	import java.lang.management.ThreadMXBean;
28	+	import java.lang.reflect.Constructor;
29	+	import java.lang.reflect.Method;
30	+	import java.lang.reflect.Modifier;
31	+	import java.nio.file.Files;
32	+	import java.nio.file.Paths;
33	+	import java.security.CodeSource;
34	+	import java.security.Permission;
35	+	import java.security.PermissionCollection;
36	+	import java.security.Permissions;
37	+	import java.security.Policy;
38	+	import java.security.ProtectionDomain;
39	+	import java.security.SecurityPermission;
40	+	import java.util.ArrayList;
41	+	import java.util.Arrays;
42	+	import java.util.Date;
43	+	import java.util.Enumeration;
44	+	import java.util.Iterator;
45	+	import java.util.List;
46	+	import java.util.NoSuchElementException;
47	+	import java.util.PropertyPermission;
48	+	import java.util.concurrent.BlockingQueue;
49	+	import java.util.concurrent.Callable;
50	+	import java.util.concurrent.CountDownLatch;
51	+	import java.util.concurrent.CyclicBarrier;
52	+	import java.util.concurrent.ExecutionException;
53	+	import java.util.concurrent.Executors;
54	+	import java.util.concurrent.ExecutorService;
55	+	import java.util.concurrent.ForkJoinPool;
56	+	import java.util.concurrent.Future;
57	+	import java.util.concurrent.RecursiveAction;
58	+	import java.util.concurrent.RecursiveTask;
59	+	import java.util.concurrent.RejectedExecutionHandler;
60	+	import java.util.concurrent.Semaphore;
61	+	import java.util.concurrent.ThreadFactory;
62	+	import java.util.concurrent.ThreadPoolExecutor;
63	+	import java.util.concurrent.TimeoutException;
64	+	import java.util.concurrent.atomic.AtomicReference;
65	+	import java.util.regex.Matcher;
66	+	import java.util.regex.Pattern;
67	+
68	+	import junit.framework.AssertionFailedError;
69	+	import junit.framework.Test;
70	+	import junit.framework.TestCase;
71	+	import junit.framework.TestResult;
72	+	import junit.framework.TestSuite;
73
74		/**
75	<	* Base class for JSR166 Junit TCK tests.  Defines some constants and
76	<	* utility methods, as well as a simple framework for helping to make
77	<	* sure that assertions failing in generated threads cause the
78	<	* associated test that generated them to itself fail (which JUnit doe
79	<	* not otherwise arrange).  The rules for creating such tests are:
75	>	* Base class for JSR166 Junit TCK tests.  Defines some constants,
76	>	* utility methods and classes, as well as a simple framework for
77	>	* helping to make sure that assertions failing in generated threads
78	>	* cause the associated test that generated them to itself fail (which
79	>	* JUnit does not otherwise arrange).  The rules for creating such
80	>	* tests are:
81		*
82		* <ol>
83		*
84	<	* <li> All assertions in code running in generated threads must use
85	<	* the forms {@link threadFail} , {@link threadAssertTrue} {@link
86	<	* threadAssertEquals}, or {@link threadAssertNull}, (not
87	<	* <tt>fail</tt>, <tt>assertTrue</tt>, etc.) It is OK (but not
84	>	* <li>All assertions in code running in generated threads must use
85	>	* the forms {@link #threadFail}, {@link #threadAssertTrue}, {@link
86	>	* #threadAssertEquals}, or {@link #threadAssertNull}, (not
87	>	* {@code fail}, {@code assertTrue}, etc.) It is OK (but not
88		* particularly recommended) for other code to use these forms too.
89		* Only the most typically used JUnit assertion methods are defined
90	<	* this way, but enough to live with.</li>
90	>	* this way, but enough to live with.
91		*
92	<	* <li> If you override {@link setUp} or {@link tearDown}, make sure
93	<	* to invoke <tt>super.setUp</tt> and <tt>super.tearDown</tt> within
92	>	* <li>If you override {@link #setUp} or {@link #tearDown}, make sure
93	>	* to invoke {@code super.setUp} and {@code super.tearDown} within
94		* them. These methods are used to clear and check for thread
95	<	* assertion failures.</li>
95	>	* assertion failures.
96		*
97	<	* <li>All delays and timeouts must use one of the constants {@link
98	<	* SHORT_DELAY_MS}, {@link SMALL_DELAY_MS}, {@link MEDIUM_DELAY_MS},
99	<	* {@link LONG_DELAY_MS}. The idea here is that a SHORT is always
100	<	* discriminatable from zero time, and always allows enough time for
101	<	* the small amounts of computation (creating a thread, calling a few
97	>	* <li>All delays and timeouts must use one of the constants {@code
98	>	* SHORT_DELAY_MS}, {@code SMALL_DELAY_MS}, {@code MEDIUM_DELAY_MS},
99	>	* {@code LONG_DELAY_MS}. The idea here is that a SHORT is always
100	>	* discriminable from zero time, and always allows enough time for the
101	>	* small amounts of computation (creating a thread, calling a few
102		* methods, etc) needed to reach a timeout point. Similarly, a SMALL
103		* is always discriminable as larger than SHORT and smaller than
104		* MEDIUM.  And so on. These constants are set to conservative values,
105	<	* (100, 500, 1000, 5000 MS) but even so, if there is ever any doubt,
106	<	* they can all be increased in one spot to rerun tests on slower
107	<	* platforms</li>
108	<	*
109	<	* <li> All threads generated must be joined inside each test case
110	<	* method (or <tt>fail</tt> to do so) before returning from the
111	<	* method. The {@link joinPool} method can be used to do this when
51	<	* using Executors.</li>
105	>	* but even so, if there is ever any doubt, they can all be increased
106	>	* in one spot to rerun tests on slower platforms.
107	>	*
108	>	* <li>All threads generated must be joined inside each test case
109	>	* method (or {@code fail} to do so) before returning from the
110	>	* method. The {@code joinPool} method can be used to do this when
111	>	* using Executors.
112		*
113		* </ol>
114	+	*
115	+	* <p><b>Other notes</b>
116	+	* <ul>
117	+	*
118	+	* <li>Usually, there is one testcase method per JSR166 method
119	+	* covering "normal" operation, and then as many exception-testing
120	+	* methods as there are exceptions the method can throw. Sometimes
121	+	* there are multiple tests per JSR166 method when the different
122	+	* "normal" behaviors differ significantly. And sometimes testcases
123	+	* cover multiple methods when they cannot be tested in isolation.
124	+	*
125	+	* <li>The documentation style for testcases is to provide as javadoc
126	+	* a simple sentence or two describing the property that the testcase
127	+	* method purports to test. The javadocs do not say anything about how
128	+	* the property is tested. To find out, read the code.
129	+	*
130	+	* <li>These tests are "conformance tests", and do not attempt to
131	+	* test throughput, latency, scalability or other performance factors
132	+	* (see the separate "jtreg" tests for a set intended to check these
133	+	* for the most central aspects of functionality.) So, most tests use
134	+	* the smallest sensible numbers of threads, collection sizes, etc
135	+	* needed to check basic conformance.
136	+	*
137	+	* <li>The test classes currently do not declare inclusion in
138	+	* any particular package to simplify things for people integrating
139	+	* them in TCK test suites.
140	+	*
141	+	* <li>As a convenience, the {@code main} of this class (JSR166TestCase)
142	+	* runs all JSR166 unit tests.
143	+	*
144	+	* </ul>
145		*/
146		public class JSR166TestCase extends TestCase {
147	+	private static final boolean useSecurityManager =
148	+	Boolean.getBoolean("jsr166.useSecurityManager");
149	+
150	+	protected static final boolean expensiveTests =
151	+	Boolean.getBoolean("jsr166.expensiveTests");
152	+
153	+	/**
154	+	* If true, also run tests that are not part of the official tck
155	+	* because they test unspecified implementation details.
156	+	*/
157	+	protected static final boolean testImplementationDetails =
158	+	Boolean.getBoolean("jsr166.testImplementationDetails");
159	+
160	+	/**
161	+	* If true, report on stdout all "slow" tests, that is, ones that
162	+	* take more than profileThreshold milliseconds to execute.
163	+	*/
164	+	private static final boolean profileTests =
165	+	Boolean.getBoolean("jsr166.profileTests");
166	+
167	+	/**
168	+	* The number of milliseconds that tests are permitted for
169	+	* execution without being reported, when profileTests is set.
170	+	*/
171	+	private static final long profileThreshold =
172	+	Long.getLong("jsr166.profileThreshold", 100);
173	+
174	+	/**
175	+	* The number of repetitions per test (for tickling rare bugs).
176	+	*/
177	+	private static final int runsPerTest =
178	+	Integer.getInteger("jsr166.runsPerTest", 1);
179	+
180	+	/**
181	+	* The number of repetitions of the test suite (for finding leaks?).
182	+	*/
183	+	private static final int suiteRuns =
184	+	Integer.getInteger("jsr166.suiteRuns", 1);
185	+
186	+	/**
187	+	* The scaling factor to apply to standard delays used in tests.
188	+	*/
189	+	private static final int delayFactor =
190	+	Integer.getInteger("jsr166.delay.factor", 1);
191	+
192	+	public JSR166TestCase() { super(); }
193	+	public JSR166TestCase(String name) { super(name); }
194	+
195	+	/**
196	+	* A filter for tests to run, matching strings of the form
197	+	* methodName(className), e.g. "testInvokeAll5(ForkJoinPoolTest)"
198	+	* Usefully combined with jsr166.runsPerTest.
199	+	*/
200	+	private static final Pattern methodFilter = methodFilter();
201	+
202	+	private static Pattern methodFilter() {
203	+	String regex = System.getProperty("jsr166.methodFilter");
204	+	return (regex == null) ? null : Pattern.compile(regex);
205	+	}
206	+
207	+	// Instrumentation to debug very rare, but very annoying hung test runs.
208	+	static volatile TestCase currentTestCase;
209	+	// static volatile int currentRun = 0;
210	+	static {
211	+	Runnable checkForWedgedTest = new Runnable() { public void run() {
212	+	// Avoid spurious reports with enormous runsPerTest.
213	+	// A single test case run should never take more than 1 second.
214	+	// But let's cap it at the high end too ...
215	+	final int timeoutMinutes =
216	+	Math.min(15, Math.max(runsPerTest / 60, 1));
217	+	for (TestCase lastTestCase = currentTestCase;;) {
218	+	try { MINUTES.sleep(timeoutMinutes); }
219	+	catch (InterruptedException unexpected) { break; }
220	+	if (lastTestCase == currentTestCase) {
221	+	System.err.printf(
222	+	"Looks like we're stuck running test: %s%n",
223	+	lastTestCase);
224	+	//                     System.err.printf(
225	+	//                         "Looks like we're stuck running test: %s (%d/%d)%n",
226	+	//                         lastTestCase, currentRun, runsPerTest);
227	+	//                     System.err.println("availableProcessors=" +
228	+	//                         Runtime.getRuntime().availableProcessors());
229	+	//                     System.err.printf("cpu model = %s%n", cpuModel());
230	+	dumpTestThreads();
231	+	// one stack dump is probably enough; more would be spam
232	+	break;
233	+	}
234	+	lastTestCase = currentTestCase;
235	+	}}};
236	+	Thread thread = new Thread(checkForWedgedTest, "checkForWedgedTest");
237	+	thread.setDaemon(true);
238	+	thread.start();
239	+	}
240	+
241	+	//     public static String cpuModel() {
242	+	//         try {
243	+	//             Matcher matcher = Pattern.compile("model name\\s*: (.*)")
244	+	//                 .matcher(new String(
245	+	//                      Files.readAllBytes(Paths.get("/proc/cpuinfo")), "UTF-8"));
246	+	//             matcher.find();
247	+	//             return matcher.group(1);
248	+	//         } catch (Exception ex) { return null; }
249	+	//     }
250	+
251	+	public void runBare() throws Throwable {
252	+	currentTestCase = this;
253	+	if (methodFilter == null
254	+	|| methodFilter.matcher(toString()).find())
255	+	super.runBare();
256	+	}
257	+
258	+	protected void runTest() throws Throwable {
259	+	for (int i = 0; i < runsPerTest; i++) {
260	+	// currentRun = i;
261	+	if (profileTests)
262	+	runTestProfiled();
263	+	else
264	+	super.runTest();
265	+	}
266	+	}
267	+
268	+	protected void runTestProfiled() throws Throwable {
269	+	for (int i = 0; i < 2; i++) {
270	+	long startTime = System.nanoTime();
271	+	super.runTest();
272	+	long elapsedMillis = millisElapsedSince(startTime);
273	+	if (elapsedMillis < profileThreshold)
274	+	break;
275	+	// Never report first run of any test; treat it as a
276	+	// warmup run, notably to trigger all needed classloading,
277	+	if (i > 0)
278	+	System.out.printf("%n%s: %d%n", toString(), elapsedMillis);
279	+	}
280	+	}
281	+
282	+	/**
283	+	* Runs all JSR166 unit tests using junit.textui.TestRunner.
284	+	*/
285	+	public static void main(String[] args) {
286	+	main(suite(), args);
287	+	}
288	+
289	+	static class PithyResultPrinter extends junit.textui.ResultPrinter {
290	+	PithyResultPrinter(java.io.PrintStream writer) { super(writer); }
291	+	long runTime;
292	+	public void startTest(Test test) {}
293	+	protected void printHeader(long runTime) {
294	+	this.runTime = runTime; // defer printing for later
295	+	}
296	+	protected void printFooter(TestResult result) {
297	+	if (result.wasSuccessful()) {
298	+	getWriter().println("OK (" + result.runCount() + " tests)"
299	+	+ "  Time: " + elapsedTimeAsString(runTime));
300	+	} else {
301	+	getWriter().println("Time: " + elapsedTimeAsString(runTime));
302	+	super.printFooter(result);
303	+	}
304	+	}
305	+	}
306	+
307	+	/**
308	+	* Returns a TestRunner that doesn't bother with unnecessary
309	+	* fluff, like printing a "." for each test case.
310	+	*/
311	+	static junit.textui.TestRunner newPithyTestRunner() {
312	+	junit.textui.TestRunner runner = new junit.textui.TestRunner();
313	+	runner.setPrinter(new PithyResultPrinter(System.out));
314	+	return runner;
315	+	}
316	+
317	+	/**
318	+	* Runs all unit tests in the given test suite.
319	+	* Actual behavior influenced by jsr166.* system properties.
320	+	*/
321	+	static void main(Test suite, String[] args) {
322	+	if (useSecurityManager) {
323	+	System.err.println("Setting a permissive security manager");
324	+	Policy.setPolicy(permissivePolicy());
325	+	System.setSecurityManager(new SecurityManager());
326	+	}
327	+	for (int i = 0; i < suiteRuns; i++) {
328	+	TestResult result = newPithyTestRunner().doRun(suite);
329	+	if (!result.wasSuccessful())
330	+	System.exit(1);
331	+	System.gc();
332	+	System.runFinalization();
333	+	}
334	+	}
335	+
336	+	public static TestSuite newTestSuite(Object... suiteOrClasses) {
337	+	TestSuite suite = new TestSuite();
338	+	for (Object suiteOrClass : suiteOrClasses) {
339	+	if (suiteOrClass instanceof TestSuite)
340	+	suite.addTest((TestSuite) suiteOrClass);
341	+	else if (suiteOrClass instanceof Class)
342	+	suite.addTest(new TestSuite((Class<?>) suiteOrClass));
343	+	else
344	+	throw new ClassCastException("not a test suite or class");
345	+	}
346	+	return suite;
347	+	}
348	+
349	+	public static void addNamedTestClasses(TestSuite suite,
350	+	String... testClassNames) {
351	+	for (String testClassName : testClassNames) {
352	+	try {
353	+	Class<?> testClass = Class.forName(testClassName);
354	+	Method m = testClass.getDeclaredMethod("suite",
355	+	new Class<?>[0]);
356	+	suite.addTest(newTestSuite((Test)m.invoke(null)));
357	+	} catch (Exception e) {
358	+	throw new Error("Missing test class", e);
359	+	}
360	+	}
361	+	}
362	+
363	+	public static final double JAVA_CLASS_VERSION;
364	+	public static final String JAVA_SPECIFICATION_VERSION;
365	+	static {
366	+	try {
367	+	JAVA_CLASS_VERSION = java.security.AccessController.doPrivileged(
368	+	new java.security.PrivilegedAction<Double>() {
369	+	public Double run() {
370	+	return Double.valueOf(System.getProperty("java.class.version"));}});
371	+	JAVA_SPECIFICATION_VERSION = java.security.AccessController.doPrivileged(
372	+	new java.security.PrivilegedAction<String>() {
373	+	public String run() {
374	+	return System.getProperty("java.specification.version");}});
375	+	} catch (Throwable t) {
376	+	throw new Error(t);
377	+	}
378	+	}
379	+
380	+	public static boolean atLeastJava6() { return JAVA_CLASS_VERSION >= 50.0; }
381	+	public static boolean atLeastJava7() { return JAVA_CLASS_VERSION >= 51.0; }
382	+	public static boolean atLeastJava8() { return JAVA_CLASS_VERSION >= 52.0; }
383	+	public static boolean atLeastJava9() {
384	+	return JAVA_CLASS_VERSION >= 53.0
385	+	// As of 2015-09, java9 still uses 52.0 class file version
386	+	|| JAVA_SPECIFICATION_VERSION.matches("^(1\\.)?(9|[0-9][0-9])$");
387	+	}
388	+	public static boolean atLeastJava10() {
389	+	return JAVA_CLASS_VERSION >= 54.0
390	+	|| JAVA_SPECIFICATION_VERSION.matches("^(1\\.)?[0-9][0-9]$");
391	+	}
392	+
393	+	/**
394	+	* Collects all JSR166 unit tests as one suite.
395	+	*/
396	+	public static Test suite() {
397	+	// Java7+ test classes
398	+	TestSuite suite = newTestSuite(
399	+	ForkJoinPoolTest.suite(),
400	+	ForkJoinTaskTest.suite(),
401	+	RecursiveActionTest.suite(),
402	+	RecursiveTaskTest.suite(),
403	+	LinkedTransferQueueTest.suite(),
404	+	PhaserTest.suite(),
405	+	ThreadLocalRandomTest.suite(),
406	+	AbstractExecutorServiceTest.suite(),
407	+	AbstractQueueTest.suite(),
408	+	AbstractQueuedSynchronizerTest.suite(),
409	+	AbstractQueuedLongSynchronizerTest.suite(),
410	+	ArrayBlockingQueueTest.suite(),
411	+	ArrayDequeTest.suite(),
412	+	AtomicBooleanTest.suite(),
413	+	AtomicIntegerArrayTest.suite(),
414	+	AtomicIntegerFieldUpdaterTest.suite(),
415	+	AtomicIntegerTest.suite(),
416	+	AtomicLongArrayTest.suite(),
417	+	AtomicLongFieldUpdaterTest.suite(),
418	+	AtomicLongTest.suite(),
419	+	AtomicMarkableReferenceTest.suite(),
420	+	AtomicReferenceArrayTest.suite(),
421	+	AtomicReferenceFieldUpdaterTest.suite(),
422	+	AtomicReferenceTest.suite(),
423	+	AtomicStampedReferenceTest.suite(),
424	+	ConcurrentHashMapTest.suite(),
425	+	ConcurrentLinkedDequeTest.suite(),
426	+	ConcurrentLinkedQueueTest.suite(),
427	+	ConcurrentSkipListMapTest.suite(),
428	+	ConcurrentSkipListSubMapTest.suite(),
429	+	ConcurrentSkipListSetTest.suite(),
430	+	ConcurrentSkipListSubSetTest.suite(),
431	+	CopyOnWriteArrayListTest.suite(),
432	+	CopyOnWriteArraySetTest.suite(),
433	+	CountDownLatchTest.suite(),
434	+	CyclicBarrierTest.suite(),
435	+	DelayQueueTest.suite(),
436	+	EntryTest.suite(),
437	+	ExchangerTest.suite(),
438	+	ExecutorsTest.suite(),
439	+	ExecutorCompletionServiceTest.suite(),
440	+	FutureTaskTest.suite(),
441	+	LinkedBlockingDequeTest.suite(),
442	+	LinkedBlockingQueueTest.suite(),
443	+	LinkedListTest.suite(),
444	+	LockSupportTest.suite(),
445	+	PriorityBlockingQueueTest.suite(),
446	+	PriorityQueueTest.suite(),
447	+	ReentrantLockTest.suite(),
448	+	ReentrantReadWriteLockTest.suite(),
449	+	ScheduledExecutorTest.suite(),
450	+	ScheduledExecutorSubclassTest.suite(),
451	+	SemaphoreTest.suite(),
452	+	SynchronousQueueTest.suite(),
453	+	SystemTest.suite(),
454	+	ThreadLocalTest.suite(),
455	+	ThreadPoolExecutorTest.suite(),
456	+	ThreadPoolExecutorSubclassTest.suite(),
457	+	ThreadTest.suite(),
458	+	TimeUnitTest.suite(),
459	+	TreeMapTest.suite(),
460	+	TreeSetTest.suite(),
461	+	TreeSubMapTest.suite(),
462	+	TreeSubSetTest.suite());
463	+
464	+	// Java8+ test classes
465	+	if (atLeastJava8()) {
466	+	String[] java8TestClassNames = {
467	+	"Atomic8Test",
468	+	"CompletableFutureTest",
469	+	"ConcurrentHashMap8Test",
470	+	"CountedCompleterTest",
471	+	"DoubleAccumulatorTest",
472	+	"DoubleAdderTest",
473	+	"ForkJoinPool8Test",
474	+	"ForkJoinTask8Test",
475	+	"LongAccumulatorTest",
476	+	"LongAdderTest",
477	+	"SplittableRandomTest",
478	+	"StampedLockTest",
479	+	"SubmissionPublisherTest",
480	+	"ThreadLocalRandom8Test",
481	+	};
482	+	addNamedTestClasses(suite, java8TestClassNames);
483	+	}
484	+
485	+	// Java9+ test classes
486	+	if (atLeastJava9()) {
487	+	String[] java9TestClassNames = {
488	+	// Currently empty, but expecting varhandle tests
489	+	};
490	+	addNamedTestClasses(suite, java9TestClassNames);
491	+	}
492	+
493	+	return suite;
494	+	}
495	+
496	+	/** Returns list of junit-style test method names in given class. */
497	+	public static ArrayList<String> testMethodNames(Class<?> testClass) {
498	+	Method[] methods = testClass.getDeclaredMethods();
499	+	ArrayList<String> names = new ArrayList<String>(methods.length);
500	+	for (Method method : methods) {
501	+	if (method.getName().startsWith("test")
502	+	&& Modifier.isPublic(method.getModifiers())
503	+	// method.getParameterCount() requires jdk8+
504	+	&& method.getParameterTypes().length == 0) {
505	+	names.add(method.getName());
506	+	}
507	+	}
508	+	return names;
509	+	}
510	+
511	+	/**
512	+	* Returns junit-style testSuite for the given test class, but
513	+	* parameterized by passing extra data to each test.
514	+	*/
515	+	public static <ExtraData> Test parameterizedTestSuite
516	+	(Class<? extends JSR166TestCase> testClass,
517	+	Class<ExtraData> dataClass,
518	+	ExtraData data) {
519	+	try {
520	+	TestSuite suite = new TestSuite();
521	+	Constructor c =
522	+	testClass.getDeclaredConstructor(dataClass, String.class);
523	+	for (String methodName : testMethodNames(testClass))
524	+	suite.addTest((Test) c.newInstance(data, methodName));
525	+	return suite;
526	+	} catch (Exception e) {
527	+	throw new Error(e);
528	+	}
529	+	}
530	+
531	+	/**
532	+	* Returns junit-style testSuite for the jdk8 extension of the
533	+	* given test class, but parameterized by passing extra data to
534	+	* each test.  Uses reflection to allow compilation in jdk7.
535	+	*/
536	+	public static <ExtraData> Test jdk8ParameterizedTestSuite
537	+	(Class<? extends JSR166TestCase> testClass,
538	+	Class<ExtraData> dataClass,
539	+	ExtraData data) {
540	+	if (atLeastJava8()) {
541	+	String name = testClass.getName();
542	+	String name8 = name.replaceAll("Test$", "8Test");
543	+	if (name.equals(name8)) throw new Error(name);
544	+	try {
545	+	return (Test)
546	+	Class.forName(name8)
547	+	.getMethod("testSuite", new Class[] { dataClass })
548	+	.invoke(null, data);
549	+	} catch (Exception e) {
550	+	throw new Error(e);
551	+	}
552	+	} else {
553	+	return new TestSuite();
554	+	}
555	+	}
556	+
557	+	// Delays for timing-dependent tests, in milliseconds.
558	+
559	+	public static long SHORT_DELAY_MS;
560	+	public static long SMALL_DELAY_MS;
561	+	public static long MEDIUM_DELAY_MS;
562	+	public static long LONG_DELAY_MS;
563	+
564	+	/**
565	+	* Returns the shortest timed delay. This can be scaled up for
566	+	* slow machines using the jsr166.delay.factor system property.
567	+	*/
568	+	protected long getShortDelay() {
569	+	return 50 * delayFactor;
570	+	}
571	+
572	+	/**
573	+	* Sets delays as multiples of SHORT_DELAY.
574	+	*/
575	+	protected void setDelays() {
576	+	SHORT_DELAY_MS = getShortDelay();
577	+	SMALL_DELAY_MS  = SHORT_DELAY_MS * 5;
578	+	MEDIUM_DELAY_MS = SHORT_DELAY_MS * 10;
579	+	LONG_DELAY_MS   = SHORT_DELAY_MS * 200;
580	+	}
581	+
582	+	/**
583	+	* Returns a timeout in milliseconds to be used in tests that
584	+	* verify that operations block or time out.
585	+	*/
586	+	long timeoutMillis() {
587	+	return SHORT_DELAY_MS / 4;
588	+	}
589	+
590	+	/**
591	+	* Returns a new Date instance representing a time at least
592	+	* delayMillis milliseconds in the future.
593	+	*/
594	+	Date delayedDate(long delayMillis) {
595	+	// Add 1 because currentTimeMillis is known to round into the past.
596	+	return new Date(System.currentTimeMillis() + delayMillis + 1);
597	+	}
598
599		/**
600	<	* Flag set true if any threadAssert methods fail
600	>	* The first exception encountered if any threadAssertXXX method fails.
601		*/
602	<	protected volatile boolean threadFailed;
602	>	private final AtomicReference<Throwable> threadFailure
603	>	= new AtomicReference<Throwable>(null);
604
605		/**
606	<	* Initialize test to indicat that no thread assertions have failed
606	>	* Records an exception so that it can be rethrown later in the test
607	>	* harness thread, triggering a test case failure.  Only the first
608	>	* failure is recorded; subsequent calls to this method from within
609	>	* the same test have no effect.
610		*/
611	<	public void setUp() {
612	<	threadFailed = false;
611	>	public void threadRecordFailure(Throwable t) {
612	>	System.err.println(t);
613	>	dumpTestThreads();
614	>	threadFailure.compareAndSet(null, t);
615	>	}
616	>
617	>	public void setUp() {
618	>	setDelays();
619	>	}
620	>
621	>	void tearDownFail(String format, Object... args) {
622	>	String msg = toString() + ": " + String.format(format, args);
623	>	System.err.println(msg);
624	>	dumpTestThreads();
625	>	throw new AssertionFailedError(msg);
626	>	}
627	>
628	>	/**
629	>	* Extra checks that get done for all test cases.
630	>	*
631	>	* Triggers test case failure if any thread assertions have failed,
632	>	* by rethrowing, in the test harness thread, any exception recorded
633	>	* earlier by threadRecordFailure.
634	>	*
635	>	* Triggers test case failure if interrupt status is set in the main thread.
636	>	*/
637	>	public void tearDown() throws Exception {
638	>	Throwable t = threadFailure.getAndSet(null);
639	>	if (t != null) {
640	>	if (t instanceof Error)
641	>	throw (Error) t;
642	>	else if (t instanceof RuntimeException)
643	>	throw (RuntimeException) t;
644	>	else if (t instanceof Exception)
645	>	throw (Exception) t;
646	>	else {
647	>	AssertionFailedError afe =
648	>	new AssertionFailedError(t.toString());
649	>	afe.initCause(t);
650	>	throw afe;
651	>	}
652	>	}
653	>
654	>	if (Thread.interrupted())
655	>	tearDownFail("interrupt status set in main thread");
656	>
657	>	checkForkJoinPoolThreadLeaks();
658		}
659
660		/**
661	<	* Trigger test case failure if any thread assertions have failed
661	>	* Finds missing PoolCleaners
662		*/
663	<	public void tearDown() {
664	<	assertFalse(threadFailed);
663	>	void checkForkJoinPoolThreadLeaks() throws InterruptedException {
664	>	Thread[] survivors = new Thread[7];
665	>	int count = Thread.enumerate(survivors);
666	>	for (int i = 0; i < count; i++) {
667	>	Thread thread = survivors[i];
668	>	String name = thread.getName();
669	>	if (name.startsWith("ForkJoinPool-")) {
670	>	// give thread some time to terminate
671	>	thread.join(LONG_DELAY_MS);
672	>	if (thread.isAlive())
673	>	tearDownFail("Found leaked ForkJoinPool thread thread=%s",
674	>	thread);
675	>	}
676	>	}
677	>
678	>	if (!ForkJoinPool.commonPool()
679	>	.awaitQuiescence(LONG_DELAY_MS, MILLISECONDS))
680	>	tearDownFail("ForkJoin common pool thread stuck");
681		}
682
683	+	/**
684	+	* Just like fail(reason), but additionally recording (using
685	+	* threadRecordFailure) any AssertionFailedError thrown, so that
686	+	* the current testcase will fail.
687	+	*/
688		public void threadFail(String reason) {
689	<	threadFailed = true;
690	<	fail(reason);
689	>	try {
690	>	fail(reason);
691	>	} catch (AssertionFailedError t) {
692	>	threadRecordFailure(t);
693	>	throw t;
694	>	}
695		}
696
697	+	/**
698	+	* Just like assertTrue(b), but additionally recording (using
699	+	* threadRecordFailure) any AssertionFailedError thrown, so that
700	+	* the current testcase will fail.
701	+	*/
702		public void threadAssertTrue(boolean b) {
703	<	if (!b) {
83	<	threadFailed = true;
703	>	try {
704		assertTrue(b);
705	+	} catch (AssertionFailedError t) {
706	+	threadRecordFailure(t);
707	+	throw t;
708		}
709		}
710	+
711	+	/**
712	+	* Just like assertFalse(b), but additionally recording (using
713	+	* threadRecordFailure) any AssertionFailedError thrown, so that
714	+	* the current testcase will fail.
715	+	*/
716		public void threadAssertFalse(boolean b) {
717	<	if (b) {
89	<	threadFailed = true;
717	>	try {
718		assertFalse(b);
719	+	} catch (AssertionFailedError t) {
720	+	threadRecordFailure(t);
721	+	throw t;
722		}
723		}
724	+
725	+	/**
726	+	* Just like assertNull(x), but additionally recording (using
727	+	* threadRecordFailure) any AssertionFailedError thrown, so that
728	+	* the current testcase will fail.
729	+	*/
730		public void threadAssertNull(Object x) {
731	<	if (x != null) {
95	<	threadFailed = true;
731	>	try {
732		assertNull(x);
733	+	} catch (AssertionFailedError t) {
734	+	threadRecordFailure(t);
735	+	throw t;
736		}
737		}
738	+
739	+	/**
740	+	* Just like assertEquals(x, y), but additionally recording (using
741	+	* threadRecordFailure) any AssertionFailedError thrown, so that
742	+	* the current testcase will fail.
743	+	*/
744		public void threadAssertEquals(long x, long y) {
745	<	if (x != y) {
101	<	threadFailed = true;
745	>	try {
746		assertEquals(x, y);
747	+	} catch (AssertionFailedError t) {
748	+	threadRecordFailure(t);
749	+	throw t;
750		}
751		}
752	+
753	+	/**
754	+	* Just like assertEquals(x, y), but additionally recording (using
755	+	* threadRecordFailure) any AssertionFailedError thrown, so that
756	+	* the current testcase will fail.
757	+	*/
758		public void threadAssertEquals(Object x, Object y) {
759	<	if (x != y && (x == null || !x.equals(y))) {
107	<	threadFailed = true;
759	>	try {
760		assertEquals(x, y);
761	+	} catch (AssertionFailedError fail) {
762	+	threadRecordFailure(fail);
763	+	throw fail;
764	+	} catch (Throwable fail) {
765	+	threadUnexpectedException(fail);
766	+	}
767	+	}
768	+
769	+	/**
770	+	* Just like assertSame(x, y), but additionally recording (using
771	+	* threadRecordFailure) any AssertionFailedError thrown, so that
772	+	* the current testcase will fail.
773	+	*/
774	+	public void threadAssertSame(Object x, Object y) {
775	+	try {
776	+	assertSame(x, y);
777	+	} catch (AssertionFailedError fail) {
778	+	threadRecordFailure(fail);
779	+	throw fail;
780	+	}
781	+	}
782	+
783	+	/**
784	+	* Calls threadFail with message "should throw exception".
785	+	*/
786	+	public void threadShouldThrow() {
787	+	threadFail("should throw exception");
788	+	}
789	+
790	+	/**
791	+	* Calls threadFail with message "should throw" + exceptionName.
792	+	*/
793	+	public void threadShouldThrow(String exceptionName) {
794	+	threadFail("should throw " + exceptionName);
795	+	}
796	+
797	+	/**
798	+	* Records the given exception using {@link #threadRecordFailure},
799	+	* then rethrows the exception, wrapping it in an
800	+	* AssertionFailedError if necessary.
801	+	*/
802	+	public void threadUnexpectedException(Throwable t) {
803	+	threadRecordFailure(t);
804	+	t.printStackTrace();
805	+	if (t instanceof RuntimeException)
806	+	throw (RuntimeException) t;
807	+	else if (t instanceof Error)
808	+	throw (Error) t;
809	+	else {
810	+	AssertionFailedError afe =
811	+	new AssertionFailedError("unexpected exception: " + t);
812	+	afe.initCause(t);
813	+	throw afe;
814	+	}
815	+	}
816	+
817	+	/**
818	+	* Delays, via Thread.sleep, for the given millisecond delay, but
819	+	* if the sleep is shorter than specified, may re-sleep or yield
820	+	* until time elapses.  Ensures that the given time, as measured
821	+	* by System.nanoTime(), has elapsed.
822	+	*/
823	+	static void delay(long millis) throws InterruptedException {
824	+	long nanos = millis * (1000 * 1000);
825	+	final long wakeupTime = System.nanoTime() + nanos;
826	+	do {
827	+	if (millis > 0L)
828	+	Thread.sleep(millis);
829	+	else // too short to sleep
830	+	Thread.yield();
831	+	nanos = wakeupTime - System.nanoTime();
832	+	millis = nanos / (1000 * 1000);
833	+	} while (nanos >= 0L);
834	+	}
835	+
836	+	/**
837	+	* Allows use of try-with-resources with per-test thread pools.
838	+	*/
839	+	class PoolCleaner implements AutoCloseable {
840	+	private final ExecutorService pool;
841	+	public PoolCleaner(ExecutorService pool) { this.pool = pool; }
842	+	public void close() { joinPool(pool); }
843	+	}
844	+
845	+	/**
846	+	* An extension of PoolCleaner that has an action to release the pool.
847	+	*/
848	+	class PoolCleanerWithReleaser extends PoolCleaner {
849	+	private final Runnable releaser;
850	+	public PoolCleanerWithReleaser(ExecutorService pool, Runnable releaser) {
851	+	super(pool);
852	+	this.releaser = releaser;
853	+	}
854	+	public void close() {
855	+	try {
856	+	releaser.run();
857	+	} finally {
858	+	super.close();
859	+	}
860		}
861		}
862
863	+	PoolCleaner cleaner(ExecutorService pool) {
864	+	return new PoolCleaner(pool);
865	+	}
866	+
867	+	PoolCleaner cleaner(ExecutorService pool, Runnable releaser) {
868	+	return new PoolCleanerWithReleaser(pool, releaser);
869	+	}
870	+
871	+	PoolCleaner cleaner(ExecutorService pool, CountDownLatch latch) {
872	+	return new PoolCleanerWithReleaser(pool, releaser(latch));
873	+	}
874	+
875	+	Runnable releaser(final CountDownLatch latch) {
876	+	return new Runnable() { public void run() {
877	+	do { latch.countDown(); }
878	+	while (latch.getCount() > 0);
879	+	}};
880	+	}
881	+
882		/**
883	<	* Wait out termination of a thread pool or fail doing so
883	>	* Waits out termination of a thread pool or fails doing so.
884		*/
885	<	public void joinPool(ExecutorService exec) {
885	>	void joinPool(ExecutorService pool) {
886		try {
887	<	exec.shutdown();
888	<	assertTrue(exec.awaitTermination(LONG_DELAY_MS, TimeUnit.MILLISECONDS));
889	<	} catch(InterruptedException ie) {
890	<	fail("unexpected exception");
887	>	pool.shutdown();
888	>	if (!pool.awaitTermination(2 * LONG_DELAY_MS, MILLISECONDS)) {
889	>	try {
890	>	threadFail("ExecutorService " + pool +
891	>	" did not terminate in a timely manner");
892	>	} finally {
893	>	// last resort, for the benefit of subsequent tests
894	>	pool.shutdownNow();
895	>	pool.awaitTermination(MEDIUM_DELAY_MS, MILLISECONDS);
896	>	}
897	>	}
898	>	} catch (SecurityException ok) {
899	>	// Allowed in case test doesn't have privs
900	>	} catch (InterruptedException fail) {
901	>	threadFail("Unexpected InterruptedException");
902		}
903		}
904
905	<	public static final long SHORT_DELAY_MS =   100;
906	<	public static final long SMALL_DELAY_MS =   500;
907	<	public static final long MEDIUM_DELAY_MS = 1000;
908	<	public static final long LONG_DELAY_MS =   5000;
905	>	/** Like Runnable, but with the freedom to throw anything */
906	>	interface Action { public void run() throws Throwable; }
907	>
908	>	/**
909	>	* Runs all the given actions in parallel, failing if any fail.
910	>	* Useful for running multiple variants of tests that are
911	>	* necessarily individually slow because they must block.
912	>	*/
913	>	void testInParallel(Action ... actions) {
914	>	ExecutorService pool = Executors.newCachedThreadPool();
915	>	try (PoolCleaner cleaner = cleaner(pool)) {
916	>	ArrayList<Future<?>> futures = new ArrayList<>(actions.length);
917	>	for (final Action action : actions)
918	>	futures.add(pool.submit(new CheckedRunnable() {
919	>	public void realRun() throws Throwable { action.run();}}));
920	>	for (Future<?> future : futures)
921	>	try {
922	>	assertNull(future.get(LONG_DELAY_MS, MILLISECONDS));
923	>	} catch (ExecutionException ex) {
924	>	threadUnexpectedException(ex.getCause());
925	>	} catch (Exception ex) {
926	>	threadUnexpectedException(ex);
927	>	}
928	>	}
929	>	}
930	>
931	>	/**
932	>	* A debugging tool to print stack traces of most threads, as jstack does.
933	>	* Uninteresting threads are filtered out.
934	>	*/
935	>	static void dumpTestThreads() {
936	>	ThreadMXBean threadMXBean = ManagementFactory.getThreadMXBean();
937	>	System.err.println("------ stacktrace dump start ------");
938	>	for (ThreadInfo info : threadMXBean.dumpAllThreads(true, true)) {
939	>	String name = info.getThreadName();
940	>	if ("Signal Dispatcher".equals(name))
941	>	continue;
942	>	if ("Reference Handler".equals(name)
943	>	&& info.getLockName().startsWith("java.lang.ref.Reference$Lock"))
944	>	continue;
945	>	if ("Finalizer".equals(name)
946	>	&& info.getLockName().startsWith("java.lang.ref.ReferenceQueue$Lock"))
947	>	continue;
948	>	if ("checkForWedgedTest".equals(name))
949	>	continue;
950	>	System.err.print(info);
951	>	}
952	>	System.err.println("------ stacktrace dump end ------");
953	>	}
954	>
955	>	/**
956	>	* Checks that thread does not terminate within the default
957	>	* millisecond delay of {@code timeoutMillis()}.
958	>	*/
959	>	void assertThreadStaysAlive(Thread thread) {
960	>	assertThreadStaysAlive(thread, timeoutMillis());
961	>	}
962	>
963	>	/**
964	>	* Checks that thread does not terminate within the given millisecond delay.
965	>	*/
966	>	void assertThreadStaysAlive(Thread thread, long millis) {
967	>	try {
968	>	// No need to optimize the failing case via Thread.join.
969	>	delay(millis);
970	>	assertTrue(thread.isAlive());
971	>	} catch (InterruptedException fail) {
972	>	threadFail("Unexpected InterruptedException");
973	>	}
974	>	}
975	>
976	>	/**
977	>	* Checks that the threads do not terminate within the default
978	>	* millisecond delay of {@code timeoutMillis()}.
979	>	*/
980	>	void assertThreadsStayAlive(Thread... threads) {
981	>	assertThreadsStayAlive(timeoutMillis(), threads);
982	>	}
983	>
984	>	/**
985	>	* Checks that the threads do not terminate within the given millisecond delay.
986	>	*/
987	>	void assertThreadsStayAlive(long millis, Thread... threads) {
988	>	try {
989	>	// No need to optimize the failing case via Thread.join.
990	>	delay(millis);
991	>	for (Thread thread : threads)
992	>	assertTrue(thread.isAlive());
993	>	} catch (InterruptedException fail) {
994	>	threadFail("Unexpected InterruptedException");
995	>	}
996	>	}
997	>
998	>	/**
999	>	* Checks that future.get times out, with the default timeout of
1000	>	* {@code timeoutMillis()}.
1001	>	*/
1002	>	void assertFutureTimesOut(Future future) {
1003	>	assertFutureTimesOut(future, timeoutMillis());
1004	>	}
1005	>
1006	>	/**
1007	>	* Checks that future.get times out, with the given millisecond timeout.
1008	>	*/
1009	>	void assertFutureTimesOut(Future future, long timeoutMillis) {
1010	>	long startTime = System.nanoTime();
1011	>	try {
1012	>	future.get(timeoutMillis, MILLISECONDS);
1013	>	shouldThrow();
1014	>	} catch (TimeoutException success) {
1015	>	} catch (Exception fail) {
1016	>	threadUnexpectedException(fail);
1017	>	} finally { future.cancel(true); }
1018	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
1019	>	}
1020	>
1021	>	/**
1022	>	* Fails with message "should throw exception".
1023	>	*/
1024	>	public void shouldThrow() {
1025	>	fail("Should throw exception");
1026	>	}
1027
1028	+	/**
1029	+	* Fails with message "should throw " + exceptionName.
1030	+	*/
1031	+	public void shouldThrow(String exceptionName) {
1032	+	fail("Should throw " + exceptionName);
1033	+	}
1034
1035		/**
1036		* The number of elements to place in collections, arrays, etc.
#	Line 134 | Line 1039 | public class JSR166TestCase extends Test
1039
1040		// Some convenient Integer constants
1041
1042	<	public static final Integer zero = new Integer(0);
1043	<	public static final Integer one = new Integer(1);
1044	<	public static final Integer two = new Integer(2);
1045	<	public static final Integer three  = new Integer(3);
1042	>	public static final Integer zero  = new Integer(0);
1043	>	public static final Integer one   = new Integer(1);
1044	>	public static final Integer two   = new Integer(2);
1045	>	public static final Integer three = new Integer(3);
1046		public static final Integer four  = new Integer(4);
1047		public static final Integer five  = new Integer(5);
1048	<	public static final Integer six = new Integer(6);
1048	>	public static final Integer six   = new Integer(6);
1049		public static final Integer seven = new Integer(7);
1050		public static final Integer eight = new Integer(8);
1051	<	public static final Integer nine = new Integer(9);
1051	>	public static final Integer nine  = new Integer(9);
1052		public static final Integer m1  = new Integer(-1);
1053		public static final Integer m2  = new Integer(-2);
1054		public static final Integer m3  = new Integer(-3);
1055	<	public static final Integer m4 = new Integer(-4);
1056	<	public static final Integer m5 = new Integer(-5);
1055	>	public static final Integer m4  = new Integer(-4);
1056	>	public static final Integer m5  = new Integer(-5);
1057	>	public static final Integer m6  = new Integer(-6);
1058		public static final Integer m10 = new Integer(-10);
1059
1060	+	/**
1061	+	* Runs Runnable r with a security policy that permits precisely
1062	+	* the specified permissions.  If there is no current security
1063	+	* manager, the runnable is run twice, both with and without a
1064	+	* security manager.  We require that any security manager permit
1065	+	* getPolicy/setPolicy.
1066	+	*/
1067	+	public void runWithPermissions(Runnable r, Permission... permissions) {
1068	+	SecurityManager sm = System.getSecurityManager();
1069	+	if (sm == null) {
1070	+	r.run();
1071	+	}
1072	+	runWithSecurityManagerWithPermissions(r, permissions);
1073	+	}
1074
1075	<	// Some convenient Runnable classes
1075	>	/**
1076	>	* Runs Runnable r with a security policy that permits precisely
1077	>	* the specified permissions.  If there is no current security
1078	>	* manager, a temporary one is set for the duration of the
1079	>	* Runnable.  We require that any security manager permit
1080	>	* getPolicy/setPolicy.
1081	>	*/
1082	>	public void runWithSecurityManagerWithPermissions(Runnable r,
1083	>	Permission... permissions) {
1084	>	SecurityManager sm = System.getSecurityManager();
1085	>	if (sm == null) {
1086	>	Policy savedPolicy = Policy.getPolicy();
1087	>	try {
1088	>	Policy.setPolicy(permissivePolicy());
1089	>	System.setSecurityManager(new SecurityManager());
1090	>	runWithSecurityManagerWithPermissions(r, permissions);
1091	>	} finally {
1092	>	System.setSecurityManager(null);
1093	>	Policy.setPolicy(savedPolicy);
1094	>	}
1095	>	} else {
1096	>	Policy savedPolicy = Policy.getPolicy();
1097	>	AdjustablePolicy policy = new AdjustablePolicy(permissions);
1098	>	Policy.setPolicy(policy);
1099
1100	<	public static class NoOpRunnable implements Runnable {
1101	<	public void run() {}
1100	>	try {
1101	>	r.run();
1102	>	} finally {
1103	>	policy.addPermission(new SecurityPermission("setPolicy"));
1104	>	Policy.setPolicy(savedPolicy);
1105	>	}
1106	>	}
1107		}
1108
1109	<	public static class NoOpCallable implements Callable {
1110	<	public Object call() { return Boolean.TRUE; }
1109	>	/**
1110	>	* Runs a runnable without any permissions.
1111	>	*/
1112	>	public void runWithoutPermissions(Runnable r) {
1113	>	runWithPermissions(r);
1114		}
1115
1116	<	public class ShortRunnable implements Runnable {
1117	<	public void run() {
1118	<	try {
1119	<	Thread.sleep(SHORT_DELAY_MS);
1116	>	/**
1117	>	* A security policy where new permissions can be dynamically added
1118	>	* or all cleared.
1119	>	*/
1120	>	public static class AdjustablePolicy extends java.security.Policy {
1121	>	Permissions perms = new Permissions();
1122	>	AdjustablePolicy(Permission... permissions) {
1123	>	for (Permission permission : permissions)
1124	>	perms.add(permission);
1125	>	}
1126	>	void addPermission(Permission perm) { perms.add(perm); }
1127	>	void clearPermissions() { perms = new Permissions(); }
1128	>	public PermissionCollection getPermissions(CodeSource cs) {
1129	>	return perms;
1130	>	}
1131	>	public PermissionCollection getPermissions(ProtectionDomain pd) {
1132	>	return perms;
1133	>	}
1134	>	public boolean implies(ProtectionDomain pd, Permission p) {
1135	>	return perms.implies(p);
1136	>	}
1137	>	public void refresh() {}
1138	>	public String toString() {
1139	>	List<Permission> ps = new ArrayList<Permission>();
1140	>	for (Enumeration<Permission> e = perms.elements(); e.hasMoreElements();)
1141	>	ps.add(e.nextElement());
1142	>	return "AdjustablePolicy with permissions " + ps;
1143	>	}
1144	>	}
1145	>
1146	>	/**
1147	>	* Returns a policy containing all the permissions we ever need.
1148	>	*/
1149	>	public static Policy permissivePolicy() {
1150	>	return new AdjustablePolicy
1151	>	// Permissions j.u.c. needs directly
1152	>	(new RuntimePermission("modifyThread"),
1153	>	new RuntimePermission("getClassLoader"),
1154	>	new RuntimePermission("setContextClassLoader"),
1155	>	// Permissions needed to change permissions!
1156	>	new SecurityPermission("getPolicy"),
1157	>	new SecurityPermission("setPolicy"),
1158	>	new RuntimePermission("setSecurityManager"),
1159	>	// Permissions needed by the junit test harness
1160	>	new RuntimePermission("accessDeclaredMembers"),
1161	>	new PropertyPermission("*", "read"),
1162	>	new java.io.FilePermission("<<ALL FILES>>", "read"));
1163	>	}
1164	>
1165	>	/**
1166	>	* Sleeps until the given time has elapsed.
1167	>	* Throws AssertionFailedError if interrupted.
1168	>	*/
1169	>	void sleep(long millis) {
1170	>	try {
1171	>	delay(millis);
1172	>	} catch (InterruptedException fail) {
1173	>	AssertionFailedError afe =
1174	>	new AssertionFailedError("Unexpected InterruptedException");
1175	>	afe.initCause(fail);
1176	>	throw afe;
1177	>	}
1178	>	}
1179	>
1180	>	/**
1181	>	* Spin-waits up to the specified number of milliseconds for the given
1182	>	* thread to enter a wait state: BLOCKED, WAITING, or TIMED_WAITING.
1183	>	*/
1184	>	void waitForThreadToEnterWaitState(Thread thread, long timeoutMillis) {
1185	>	long startTime = System.nanoTime();
1186	>	for (;;) {
1187	>	Thread.State s = thread.getState();
1188	>	if (s == Thread.State.BLOCKED ||
1189	>	s == Thread.State.WAITING ||
1190	>	s == Thread.State.TIMED_WAITING)
1191	>	return;
1192	>	else if (s == Thread.State.TERMINATED)
1193	>	fail("Unexpected thread termination");
1194	>	else if (millisElapsedSince(startTime) > timeoutMillis) {
1195	>	threadAssertTrue(thread.isAlive());
1196	>	return;
1197		}
1198	<	catch(Exception e) {
1199	<	threadFail("unexpectedException");
1198	>	Thread.yield();
1199	>	}
1200	>	}
1201	>
1202	>	/**
1203	>	* Waits up to LONG_DELAY_MS for the given thread to enter a wait
1204	>	* state: BLOCKED, WAITING, or TIMED_WAITING.
1205	>	*/
1206	>	void waitForThreadToEnterWaitState(Thread thread) {
1207	>	waitForThreadToEnterWaitState(thread, LONG_DELAY_MS);
1208	>	}
1209	>
1210	>	/**
1211	>	* Returns the number of milliseconds since time given by
1212	>	* startNanoTime, which must have been previously returned from a
1213	>	* call to {@link System#nanoTime()}.
1214	>	*/
1215	>	static long millisElapsedSince(long startNanoTime) {
1216	>	return NANOSECONDS.toMillis(System.nanoTime() - startNanoTime);
1217	>	}
1218	>
1219	>	//     void assertTerminatesPromptly(long timeoutMillis, Runnable r) {
1220	>	//         long startTime = System.nanoTime();
1221	>	//         try {
1222	>	//             r.run();
1223	>	//         } catch (Throwable fail) { threadUnexpectedException(fail); }
1224	>	//         if (millisElapsedSince(startTime) > timeoutMillis/2)
1225	>	//             throw new AssertionFailedError("did not return promptly");
1226	>	//     }
1227	>
1228	>	//     void assertTerminatesPromptly(Runnable r) {
1229	>	//         assertTerminatesPromptly(LONG_DELAY_MS/2, r);
1230	>	//     }
1231	>
1232	>	/**
1233	>	* Checks that timed f.get() returns the expected value, and does not
1234	>	* wait for the timeout to elapse before returning.
1235	>	*/
1236	>	<T> void checkTimedGet(Future<T> f, T expectedValue, long timeoutMillis) {
1237	>	long startTime = System.nanoTime();
1238	>	try {
1239	>	assertEquals(expectedValue, f.get(timeoutMillis, MILLISECONDS));
1240	>	} catch (Throwable fail) { threadUnexpectedException(fail); }
1241	>	if (millisElapsedSince(startTime) > timeoutMillis/2)
1242	>	throw new AssertionFailedError("timed get did not return promptly");
1243	>	}
1244	>
1245	>	<T> void checkTimedGet(Future<T> f, T expectedValue) {
1246	>	checkTimedGet(f, expectedValue, LONG_DELAY_MS);
1247	>	}
1248	>
1249	>	/**
1250	>	* Returns a new started daemon Thread running the given runnable.
1251	>	*/
1252	>	Thread newStartedThread(Runnable runnable) {
1253	>	Thread t = new Thread(runnable);
1254	>	t.setDaemon(true);
1255	>	t.start();
1256	>	return t;
1257	>	}
1258	>
1259	>	/**
1260	>	* Waits for the specified time (in milliseconds) for the thread
1261	>	* to terminate (using {@link Thread#join(long)}), else interrupts
1262	>	* the thread (in the hope that it may terminate later) and fails.
1263	>	*/
1264	>	void awaitTermination(Thread t, long timeoutMillis) {
1265	>	try {
1266	>	t.join(timeoutMillis);
1267	>	} catch (InterruptedException fail) {
1268	>	threadUnexpectedException(fail);
1269	>	} finally {
1270	>	if (t.getState() != Thread.State.TERMINATED) {
1271	>	t.interrupt();
1272	>	threadFail("timed out waiting for thread to terminate");
1273		}
1274		}
1275		}
1276
1277	<	public class ShortInterruptedRunnable implements Runnable {
1278	<	public void run() {
1277	>	/**
1278	>	* Waits for LONG_DELAY_MS milliseconds for the thread to
1279	>	* terminate (using {@link Thread#join(long)}), else interrupts
1280	>	* the thread (in the hope that it may terminate later) and fails.
1281	>	*/
1282	>	void awaitTermination(Thread t) {
1283	>	awaitTermination(t, LONG_DELAY_MS);
1284	>	}
1285	>
1286	>	// Some convenient Runnable classes
1287	>
1288	>	public abstract class CheckedRunnable implements Runnable {
1289	>	protected abstract void realRun() throws Throwable;
1290	>
1291	>	public final void run() {
1292		try {
1293	<	Thread.sleep(SHORT_DELAY_MS);
1294	<	threadFail("should throw IE");
1293	>	realRun();
1294	>	} catch (Throwable fail) {
1295	>	threadUnexpectedException(fail);
1296		}
1297	<	catch(InterruptedException success) {
1297	>	}
1298	>	}
1299	>
1300	>	public abstract class RunnableShouldThrow implements Runnable {
1301	>	protected abstract void realRun() throws Throwable;
1302	>
1303	>	final Class<?> exceptionClass;
1304	>
1305	>	<T extends Throwable> RunnableShouldThrow(Class<T> exceptionClass) {
1306	>	this.exceptionClass = exceptionClass;
1307	>	}
1308	>
1309	>	public final void run() {
1310	>	try {
1311	>	realRun();
1312	>	threadShouldThrow(exceptionClass.getSimpleName());
1313	>	} catch (Throwable t) {
1314	>	if (! exceptionClass.isInstance(t))
1315	>	threadUnexpectedException(t);
1316		}
1317		}
1318		}
1319
1320	<	public class SmallRunnable implements Runnable {
1321	<	public void run() {
1320	>	public abstract class ThreadShouldThrow extends Thread {
1321	>	protected abstract void realRun() throws Throwable;
1322	>
1323	>	final Class<?> exceptionClass;
1324	>
1325	>	<T extends Throwable> ThreadShouldThrow(Class<T> exceptionClass) {
1326	>	this.exceptionClass = exceptionClass;
1327	>	}
1328	>
1329	>	public final void run() {
1330		try {
1331	<	Thread.sleep(SMALL_DELAY_MS);
1331	>	realRun();
1332	>	threadShouldThrow(exceptionClass.getSimpleName());
1333	>	} catch (Throwable t) {
1334	>	if (! exceptionClass.isInstance(t))
1335	>	threadUnexpectedException(t);
1336		}
1337	<	catch(Exception e) {
1338	<	threadFail("unexpectedException");
1337	>	}
1338	>	}
1339	>
1340	>	public abstract class CheckedInterruptedRunnable implements Runnable {
1341	>	protected abstract void realRun() throws Throwable;
1342	>
1343	>	public final void run() {
1344	>	try {
1345	>	realRun();
1346	>	threadShouldThrow("InterruptedException");
1347	>	} catch (InterruptedException success) {
1348	>	threadAssertFalse(Thread.interrupted());
1349	>	} catch (Throwable fail) {
1350	>	threadUnexpectedException(fail);
1351		}
1352		}
1353		}
1354
1355	<	public class SmallCallable implements Callable {
1356	<	public Object call() {
1355	>	public abstract class CheckedCallable<T> implements Callable<T> {
1356	>	protected abstract T realCall() throws Throwable;
1357	>
1358	>	public final T call() {
1359		try {
1360	<	Thread.sleep(SMALL_DELAY_MS);
1360	>	return realCall();
1361	>	} catch (Throwable fail) {
1362	>	threadUnexpectedException(fail);
1363	>	return null;
1364		}
1365	<	catch(Exception e) {
1366	<	threadFail("unexpectedException");
1365	>	}
1366	>	}
1367	>
1368	>	public abstract class CheckedInterruptedCallable<T>
1369	>	implements Callable<T> {
1370	>	protected abstract T realCall() throws Throwable;
1371	>
1372	>	public final T call() {
1373	>	try {
1374	>	T result = realCall();
1375	>	threadShouldThrow("InterruptedException");
1376	>	return result;
1377	>	} catch (InterruptedException success) {
1378	>	threadAssertFalse(Thread.interrupted());
1379	>	} catch (Throwable fail) {
1380	>	threadUnexpectedException(fail);
1381		}
1382	+	return null;
1383	+	}
1384	+	}
1385	+
1386	+	public static class NoOpRunnable implements Runnable {
1387	+	public void run() {}
1388	+	}
1389	+
1390	+	public static class NoOpCallable implements Callable {
1391	+	public Object call() { return Boolean.TRUE; }
1392	+	}
1393	+
1394	+	public static final String TEST_STRING = "a test string";
1395	+
1396	+	public static class StringTask implements Callable<String> {
1397	+	final String value;
1398	+	public StringTask() { this(TEST_STRING); }
1399	+	public StringTask(String value) { this.value = value; }
1400	+	public String call() { return value; }
1401	+	}
1402	+
1403	+	public Callable<String> latchAwaitingStringTask(final CountDownLatch latch) {
1404	+	return new CheckedCallable<String>() {
1405	+	protected String realCall() {
1406	+	try {
1407	+	latch.await();
1408	+	} catch (InterruptedException quittingTime) {}
1409	+	return TEST_STRING;
1410	+	}};
1411	+	}
1412	+
1413	+	public Runnable countDowner(final CountDownLatch latch) {
1414	+	return new CheckedRunnable() {
1415	+	public void realRun() throws InterruptedException {
1416	+	latch.countDown();
1417	+	}};
1418	+	}
1419	+
1420	+	class LatchAwaiter extends CheckedRunnable {
1421	+	static final int NEW = 0;
1422	+	static final int RUNNING = 1;
1423	+	static final int DONE = 2;
1424	+	final CountDownLatch latch;
1425	+	int state = NEW;
1426	+	LatchAwaiter(CountDownLatch latch) { this.latch = latch; }
1427	+	public void realRun() throws InterruptedException {
1428	+	state = 1;
1429	+	await(latch);
1430	+	state = 2;
1431	+	}
1432	+	}
1433	+
1434	+	public LatchAwaiter awaiter(CountDownLatch latch) {
1435	+	return new LatchAwaiter(latch);
1436	+	}
1437	+
1438	+	public void await(CountDownLatch latch) {
1439	+	try {
1440	+	if (!latch.await(LONG_DELAY_MS, MILLISECONDS))
1441	+	fail("timed out waiting for CountDownLatch for "
1442	+	+ (LONG_DELAY_MS/1000) + " sec");
1443	+	} catch (Throwable fail) {
1444	+	threadUnexpectedException(fail);
1445	+	}
1446	+	}
1447	+
1448	+	public void await(Semaphore semaphore) {
1449	+	try {
1450	+	if (!semaphore.tryAcquire(LONG_DELAY_MS, MILLISECONDS))
1451	+	fail("timed out waiting for Semaphore for "
1452	+	+ (LONG_DELAY_MS/1000) + " sec");
1453	+	} catch (Throwable fail) {
1454	+	threadUnexpectedException(fail);
1455	+	}
1456	+	}
1457	+
1458	+	//     /**
1459	+	//      * Spin-waits up to LONG_DELAY_MS until flag becomes true.
1460	+	//      */
1461	+	//     public void await(AtomicBoolean flag) {
1462	+	//         await(flag, LONG_DELAY_MS);
1463	+	//     }
1464	+
1465	+	//     /**
1466	+	//      * Spin-waits up to the specified timeout until flag becomes true.
1467	+	//      */
1468	+	//     public void await(AtomicBoolean flag, long timeoutMillis) {
1469	+	//         long startTime = System.nanoTime();
1470	+	//         while (!flag.get()) {
1471	+	//             if (millisElapsedSince(startTime) > timeoutMillis)
1472	+	//                 throw new AssertionFailedError("timed out");
1473	+	//             Thread.yield();
1474	+	//         }
1475	+	//     }
1476	+
1477	+	public static class NPETask implements Callable<String> {
1478	+	public String call() { throw new NullPointerException(); }
1479	+	}
1480	+
1481	+	public static class CallableOne implements Callable<Integer> {
1482	+	public Integer call() { return one; }
1483	+	}
1484	+
1485	+	public class ShortRunnable extends CheckedRunnable {
1486	+	protected void realRun() throws Throwable {
1487	+	delay(SHORT_DELAY_MS);
1488	+	}
1489	+	}
1490	+
1491	+	public class ShortInterruptedRunnable extends CheckedInterruptedRunnable {
1492	+	protected void realRun() throws InterruptedException {
1493	+	delay(SHORT_DELAY_MS);
1494	+	}
1495	+	}
1496	+
1497	+	public class SmallRunnable extends CheckedRunnable {
1498	+	protected void realRun() throws Throwable {
1499	+	delay(SMALL_DELAY_MS);
1500	+	}
1501	+	}
1502	+
1503	+	public class SmallPossiblyInterruptedRunnable extends CheckedRunnable {
1504	+	protected void realRun() {
1505	+	try {
1506	+	delay(SMALL_DELAY_MS);
1507	+	} catch (InterruptedException ok) {}
1508	+	}
1509	+	}
1510	+
1511	+	public class SmallCallable extends CheckedCallable {
1512	+	protected Object realCall() throws InterruptedException {
1513	+	delay(SMALL_DELAY_MS);
1514		return Boolean.TRUE;
1515		}
1516		}
1517
1518	<	public class SmallInterruptedRunnable implements Runnable {
1518	>	public class MediumRunnable extends CheckedRunnable {
1519	>	protected void realRun() throws Throwable {
1520	>	delay(MEDIUM_DELAY_MS);
1521	>	}
1522	>	}
1523	>
1524	>	public class MediumInterruptedRunnable extends CheckedInterruptedRunnable {
1525	>	protected void realRun() throws InterruptedException {
1526	>	delay(MEDIUM_DELAY_MS);
1527	>	}
1528	>	}
1529	>
1530	>	public Runnable possiblyInterruptedRunnable(final long timeoutMillis) {
1531	>	return new CheckedRunnable() {
1532	>	protected void realRun() {
1533	>	try {
1534	>	delay(timeoutMillis);
1535	>	} catch (InterruptedException ok) {}
1536	>	}};
1537	>	}
1538	>
1539	>	public class MediumPossiblyInterruptedRunnable extends CheckedRunnable {
1540	>	protected void realRun() {
1541	>	try {
1542	>	delay(MEDIUM_DELAY_MS);
1543	>	} catch (InterruptedException ok) {}
1544	>	}
1545	>	}
1546	>
1547	>	public class LongPossiblyInterruptedRunnable extends CheckedRunnable {
1548	>	protected void realRun() {
1549	>	try {
1550	>	delay(LONG_DELAY_MS);
1551	>	} catch (InterruptedException ok) {}
1552	>	}
1553	>	}
1554	>
1555	>	/**
1556	>	* For use as ThreadFactory in constructors
1557	>	*/
1558	>	public static class SimpleThreadFactory implements ThreadFactory {
1559	>	public Thread newThread(Runnable r) {
1560	>	return new Thread(r);
1561	>	}
1562	>	}
1563	>
1564	>	public interface TrackedRunnable extends Runnable {
1565	>	boolean isDone();
1566	>	}
1567	>
1568	>	public static TrackedRunnable trackedRunnable(final long timeoutMillis) {
1569	>	return new TrackedRunnable() {
1570	>	private volatile boolean done = false;
1571	>	public boolean isDone() { return done; }
1572	>	public void run() {
1573	>	try {
1574	>	delay(timeoutMillis);
1575	>	done = true;
1576	>	} catch (InterruptedException ok) {}
1577	>	}
1578	>	};
1579	>	}
1580	>
1581	>	public static class TrackedShortRunnable implements Runnable {
1582	>	public volatile boolean done = false;
1583		public void run() {
1584		try {
1585	<	Thread.sleep(SMALL_DELAY_MS);
1586	<	threadFail("should throw IE");
1587	<	}
1588	<	catch(InterruptedException success) {
1589	<	}
1585	>	delay(SHORT_DELAY_MS);
1586	>	done = true;
1587	>	} catch (InterruptedException ok) {}
1588	>	}
1589	>	}
1590	>
1591	>	public static class TrackedSmallRunnable implements Runnable {
1592	>	public volatile boolean done = false;
1593	>	public void run() {
1594	>	try {
1595	>	delay(SMALL_DELAY_MS);
1596	>	done = true;
1597	>	} catch (InterruptedException ok) {}
1598		}
1599		}
1600
1601	+	public static class TrackedMediumRunnable implements Runnable {
1602	+	public volatile boolean done = false;
1603	+	public void run() {
1604	+	try {
1605	+	delay(MEDIUM_DELAY_MS);
1606	+	done = true;
1607	+	} catch (InterruptedException ok) {}
1608	+	}
1609	+	}
1610
1611	<	public class MediumRunnable implements Runnable {
1611	>	public static class TrackedLongRunnable implements Runnable {
1612	>	public volatile boolean done = false;
1613		public void run() {
1614		try {
1615	<	Thread.sleep(MEDIUM_DELAY_MS);
1616	<	}
1617	<	catch(Exception e) {
228	<	threadFail("unexpectedException");
229	<	}
1615	>	delay(LONG_DELAY_MS);
1616	>	done = true;
1617	>	} catch (InterruptedException ok) {}
1618		}
1619		}
1620
1621	<	public class MediumInterruptedRunnable implements Runnable {
1621	>	public static class TrackedNoOpRunnable implements Runnable {
1622	>	public volatile boolean done = false;
1623		public void run() {
1624	+	done = true;
1625	+	}
1626	+	}
1627	+
1628	+	public static class TrackedCallable implements Callable {
1629	+	public volatile boolean done = false;
1630	+	public Object call() {
1631		try {
1632	<	Thread.sleep(MEDIUM_DELAY_MS);
1633	<	threadFail("should throw IE");
1632	>	delay(SMALL_DELAY_MS);
1633	>	done = true;
1634	>	} catch (InterruptedException ok) {}
1635	>	return Boolean.TRUE;
1636	>	}
1637	>	}
1638	>
1639	>	/**
1640	>	* Analog of CheckedRunnable for RecursiveAction
1641	>	*/
1642	>	public abstract class CheckedRecursiveAction extends RecursiveAction {
1643	>	protected abstract void realCompute() throws Throwable;
1644	>
1645	>	@Override protected final void compute() {
1646	>	try {
1647	>	realCompute();
1648	>	} catch (Throwable fail) {
1649	>	threadUnexpectedException(fail);
1650		}
1651	<	catch(InterruptedException success) {
1651	>	}
1652	>	}
1653	>
1654	>	/**
1655	>	* Analog of CheckedCallable for RecursiveTask
1656	>	*/
1657	>	public abstract class CheckedRecursiveTask<T> extends RecursiveTask<T> {
1658	>	protected abstract T realCompute() throws Throwable;
1659	>
1660	>	@Override protected final T compute() {
1661	>	try {
1662	>	return realCompute();
1663	>	} catch (Throwable fail) {
1664	>	threadUnexpectedException(fail);
1665	>	return null;
1666		}
1667		}
1668		}
1669
1670	<	public class MediumPossiblyInterruptedRunnable implements Runnable {
1671	<	public void run() {
1670	>	/**
1671	>	* For use as RejectedExecutionHandler in constructors
1672	>	*/
1673	>	public static class NoOpREHandler implements RejectedExecutionHandler {
1674	>	public void rejectedExecution(Runnable r,
1675	>	ThreadPoolExecutor executor) {}
1676	>	}
1677	>
1678	>	/**
1679	>	* A CyclicBarrier that uses timed await and fails with
1680	>	* AssertionFailedErrors instead of throwing checked exceptions.
1681	>	*/
1682	>	public class CheckedBarrier extends CyclicBarrier {
1683	>	public CheckedBarrier(int parties) { super(parties); }
1684	>
1685	>	public int await() {
1686		try {
1687	<	Thread.sleep(MEDIUM_DELAY_MS);
1687	>	return super.await(2 * LONG_DELAY_MS, MILLISECONDS);
1688	>	} catch (TimeoutException timedOut) {
1689	>	throw new AssertionFailedError("timed out");
1690	>	} catch (Exception fail) {
1691	>	AssertionFailedError afe =
1692	>	new AssertionFailedError("Unexpected exception: " + fail);
1693	>	afe.initCause(fail);
1694	>	throw afe;
1695		}
1696	<	catch(InterruptedException success) {
1696	>	}
1697	>	}
1698	>
1699	>	void checkEmpty(BlockingQueue q) {
1700	>	try {
1701	>	assertTrue(q.isEmpty());
1702	>	assertEquals(0, q.size());
1703	>	assertNull(q.peek());
1704	>	assertNull(q.poll());
1705	>	assertNull(q.poll(0, MILLISECONDS));
1706	>	assertEquals(q.toString(), "[]");
1707	>	assertTrue(Arrays.equals(q.toArray(), new Object[0]));
1708	>	assertFalse(q.iterator().hasNext());
1709	>	try {
1710	>	q.element();
1711	>	shouldThrow();
1712	>	} catch (NoSuchElementException success) {}
1713	>	try {
1714	>	q.iterator().next();
1715	>	shouldThrow();
1716	>	} catch (NoSuchElementException success) {}
1717	>	try {
1718	>	q.remove();
1719	>	shouldThrow();
1720	>	} catch (NoSuchElementException success) {}
1721	>	} catch (InterruptedException fail) { threadUnexpectedException(fail); }
1722	>	}
1723	>
1724	>	void assertSerialEquals(Object x, Object y) {
1725	>	assertTrue(Arrays.equals(serialBytes(x), serialBytes(y)));
1726	>	}
1727	>
1728	>	void assertNotSerialEquals(Object x, Object y) {
1729	>	assertFalse(Arrays.equals(serialBytes(x), serialBytes(y)));
1730	>	}
1731	>
1732	>	byte[] serialBytes(Object o) {
1733	>	try {
1734	>	ByteArrayOutputStream bos = new ByteArrayOutputStream();
1735	>	ObjectOutputStream oos = new ObjectOutputStream(bos);
1736	>	oos.writeObject(o);
1737	>	oos.flush();
1738	>	oos.close();
1739	>	return bos.toByteArray();
1740	>	} catch (Throwable fail) {
1741	>	threadUnexpectedException(fail);
1742	>	return new byte[0];
1743	>	}
1744	>	}
1745	>
1746	>	@SuppressWarnings("unchecked")
1747	>	<T> T serialClone(T o) {
1748	>	try {
1749	>	ObjectInputStream ois = new ObjectInputStream
1750	>	(new ByteArrayInputStream(serialBytes(o)));
1751	>	T clone = (T) ois.readObject();
1752	>	assertSame(o.getClass(), clone.getClass());
1753	>	return clone;
1754	>	} catch (Throwable fail) {
1755	>	threadUnexpectedException(fail);
1756	>	return null;
1757	>	}
1758	>	}
1759	>
1760	>	public void assertThrows(Class<? extends Throwable> expectedExceptionClass,
1761	>	Runnable... throwingActions) {
1762	>	for (Runnable throwingAction : throwingActions) {
1763	>	boolean threw = false;
1764	>	try { throwingAction.run(); }
1765	>	catch (Throwable t) {
1766	>	threw = true;
1767	>	if (!expectedExceptionClass.isInstance(t)) {
1768	>	AssertionFailedError afe =
1769	>	new AssertionFailedError
1770	>	("Expected " + expectedExceptionClass.getName() +
1771	>	", got " + t.getClass().getName());
1772	>	afe.initCause(t);
1773	>	threadUnexpectedException(afe);
1774	>	}
1775		}
1776	+	if (!threw)
1777	+	shouldThrow(expectedExceptionClass.getName());
1778		}
1779		}
1780	<
1780	>
1781	>	public void assertIteratorExhausted(Iterator<?> it) {
1782	>	try {
1783	>	it.next();
1784	>	shouldThrow();
1785	>	} catch (NoSuchElementException success) {}
1786	>	assertFalse(it.hasNext());
1787	>	}
1788		}

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