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

Comparing jsr166/src/test/tck/JSR166TestCase.java (file contents):
Revision 1.3 by dl, Sat Sep 20 18:20:08 2003 UTC vs.
Revision 1.181 by jsr166, Mon Nov 9 06:06:54 2015 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.*;
13	<
9	>	import static java.util.concurrent.TimeUnit.MILLISECONDS;
10	>	import static java.util.concurrent.TimeUnit.MINUTES;
11	>	import static java.util.concurrent.TimeUnit.NANOSECONDS;
12	>
13	>	import java.io.ByteArrayInputStream;
14	>	import java.io.ByteArrayOutputStream;
15	>	import java.io.ObjectInputStream;
16	>	import java.io.ObjectOutputStream;
17	>	import java.lang.management.ManagementFactory;
18	>	import java.lang.management.ThreadInfo;
19	>	import java.lang.management.ThreadMXBean;
20	>	import java.lang.reflect.Constructor;
21	>	import java.lang.reflect.Method;
22	>	import java.lang.reflect.Modifier;
23	>	import java.nio.file.Files;
24	>	import java.nio.file.Paths;
25	>	import java.security.CodeSource;
26	>	import java.security.Permission;
27	>	import java.security.PermissionCollection;
28	>	import java.security.Permissions;
29	>	import java.security.Policy;
30	>	import java.security.ProtectionDomain;
31	>	import java.security.SecurityPermission;
32	>	import java.util.ArrayList;
33	>	import java.util.Arrays;
34	>	import java.util.Date;
35	>	import java.util.Enumeration;
36	>	import java.util.Iterator;
37	>	import java.util.List;
38	>	import java.util.NoSuchElementException;
39	>	import java.util.PropertyPermission;
40	>	import java.util.concurrent.BlockingQueue;
41	>	import java.util.concurrent.Callable;
42	>	import java.util.concurrent.CountDownLatch;
43	>	import java.util.concurrent.CyclicBarrier;
44	>	import java.util.concurrent.ExecutionException;
45	>	import java.util.concurrent.Executors;
46	>	import java.util.concurrent.ExecutorService;
47	>	import java.util.concurrent.ForkJoinPool;
48	>	import java.util.concurrent.Future;
49	>	import java.util.concurrent.RecursiveAction;
50	>	import java.util.concurrent.RecursiveTask;
51	>	import java.util.concurrent.RejectedExecutionHandler;
52	>	import java.util.concurrent.Semaphore;
53	>	import java.util.concurrent.ThreadFactory;
54	>	import java.util.concurrent.ThreadPoolExecutor;
55	>	import java.util.concurrent.TimeoutException;
56	>	import java.util.concurrent.atomic.AtomicReference;
57	>	import java.util.regex.Matcher;
58	>	import java.util.regex.Pattern;
59	>
60	>	import junit.framework.AssertionFailedError;
61	>	import junit.framework.Test;
62	>	import junit.framework.TestCase;
63	>	import junit.framework.TestResult;
64	>	import junit.framework.TestSuite;
65
66		/**
67	<	* Base class for JSR166 Junit TCK tests.  Defines some constants and
68	<	* utility methods, as well as a simple framework for helping to make
69	<	* sure that assertions failing in generated threads cause the
70	<	* associated test that generated them to itself fail (which JUnit doe
71	<	* not otherwise arrange).  The rules for creating such tests are:
67	>	* Base class for JSR166 Junit TCK tests.  Defines some constants,
68	>	* utility methods and classes, as well as a simple framework for
69	>	* helping to make sure that assertions failing in generated threads
70	>	* cause the associated test that generated them to itself fail (which
71	>	* JUnit does not otherwise arrange).  The rules for creating such
72	>	* tests are:
73		*
74		* <ol>
75		*
76	<	* <li> All assertions in code running in generated threads must use
77	<	* the forms {@link threadFail} , {@link threadAssertTrue} {@link
78	<	* threadAssertEquals}, or {@link threadAssertNull}, (not
79	<	* <tt>fail</tt>, <tt>assertTrue</tt>, etc.) It is OK (but not
76	>	* <li>All assertions in code running in generated threads must use
77	>	* the forms {@link #threadFail}, {@link #threadAssertTrue}, {@link
78	>	* #threadAssertEquals}, or {@link #threadAssertNull}, (not
79	>	* {@code fail}, {@code assertTrue}, etc.) It is OK (but not
80		* particularly recommended) for other code to use these forms too.
81		* Only the most typically used JUnit assertion methods are defined
82	<	* this way, but enough to live with.</li>
82	>	* this way, but enough to live with.
83		*
84	<	* <li> If you override {@link setUp} or {@link tearDown}, make sure
85	<	* to invoke <tt>super.setUp</tt> and <tt>super.tearDown</tt> within
84	>	* <li>If you override {@link #setUp} or {@link #tearDown}, make sure
85	>	* to invoke {@code super.setUp} and {@code super.tearDown} within
86		* them. These methods are used to clear and check for thread
87	<	* assertion failures.</li>
87	>	* assertion failures.
88		*
89	<	* <li>All delays and timeouts must use one of the constants {@link
90	<	* SHORT_DELAY_MS}, {@link SMALL_DELAY_MS}, {@link MEDIUM_DELAY_MS},
91	<	* {@link LONG_DELAY_MS}. The idea here is that a SHORT is always
92	<	* discriminatable from zero time, and always allows enough time for
93	<	* the small amounts of computation (creating a thread, calling a few
89	>	* <li>All delays and timeouts must use one of the constants {@code
90	>	* SHORT_DELAY_MS}, {@code SMALL_DELAY_MS}, {@code MEDIUM_DELAY_MS},
91	>	* {@code LONG_DELAY_MS}. The idea here is that a SHORT is always
92	>	* discriminable from zero time, and always allows enough time for the
93	>	* small amounts of computation (creating a thread, calling a few
94		* methods, etc) needed to reach a timeout point. Similarly, a SMALL
95		* is always discriminable as larger than SHORT and smaller than
96		* MEDIUM.  And so on. These constants are set to conservative values,
97		* but even so, if there is ever any doubt, they can all be increased
98	<	* in one spot to rerun tests on slower platforms</li>
98	>	* in one spot to rerun tests on slower platforms.
99		*
100	<	* <li> All threads generated must be joined inside each test case
101	<	* method (or <tt>fail</tt> to do so) before returning from the
102	<	* method. The {@link joinPool} method can be used to do this when
103	<	* using Executors.</li>
100	>	* <li>All threads generated must be joined inside each test case
101	>	* method (or {@code fail} to do so) before returning from the
102	>	* method. The {@code joinPool} method can be used to do this when
103	>	* using Executors.
104		*
105		* </ol>
106	+	*
107	+	* <p><b>Other notes</b>
108	+	* <ul>
109	+	*
110	+	* <li>Usually, there is one testcase method per JSR166 method
111	+	* covering "normal" operation, and then as many exception-testing
112	+	* methods as there are exceptions the method can throw. Sometimes
113	+	* there are multiple tests per JSR166 method when the different
114	+	* "normal" behaviors differ significantly. And sometimes testcases
115	+	* cover multiple methods when they cannot be tested in isolation.
116	+	*
117	+	* <li>The documentation style for testcases is to provide as javadoc
118	+	* a simple sentence or two describing the property that the testcase
119	+	* method purports to test. The javadocs do not say anything about how
120	+	* the property is tested. To find out, read the code.
121	+	*
122	+	* <li>These tests are "conformance tests", and do not attempt to
123	+	* test throughput, latency, scalability or other performance factors
124	+	* (see the separate "jtreg" tests for a set intended to check these
125	+	* for the most central aspects of functionality.) So, most tests use
126	+	* the smallest sensible numbers of threads, collection sizes, etc
127	+	* needed to check basic conformance.
128	+	*
129	+	* <li>The test classes currently do not declare inclusion in
130	+	* any particular package to simplify things for people integrating
131	+	* them in TCK test suites.
132	+	*
133	+	* <li>As a convenience, the {@code main} of this class (JSR166TestCase)
134	+	* runs all JSR166 unit tests.
135	+	*
136	+	* </ul>
137		*/
138		public class JSR166TestCase extends TestCase {
139	+	private static final boolean useSecurityManager =
140	+	Boolean.getBoolean("jsr166.useSecurityManager");
141	+
142	+	protected static final boolean expensiveTests =
143	+	Boolean.getBoolean("jsr166.expensiveTests");
144	+
145	+	/**
146	+	* If true, also run tests that are not part of the official tck
147	+	* because they test unspecified implementation details.
148	+	*/
149	+	protected static final boolean testImplementationDetails =
150	+	Boolean.getBoolean("jsr166.testImplementationDetails");
151	+
152	+	/**
153	+	* If true, report on stdout all "slow" tests, that is, ones that
154	+	* take more than profileThreshold milliseconds to execute.
155	+	*/
156	+	private static final boolean profileTests =
157	+	Boolean.getBoolean("jsr166.profileTests");
158	+
159	+	/**
160	+	* The number of milliseconds that tests are permitted for
161	+	* execution without being reported, when profileTests is set.
162	+	*/
163	+	private static final long profileThreshold =
164	+	Long.getLong("jsr166.profileThreshold", 100);
165	+
166	+	/**
167	+	* The number of repetitions per test (for tickling rare bugs).
168	+	*/
169	+	private static final int runsPerTest =
170	+	Integer.getInteger("jsr166.runsPerTest", 1);
171	+
172	+	/**
173	+	* The number of repetitions of the test suite (for finding leaks?).
174	+	*/
175	+	private static final int suiteRuns =
176	+	Integer.getInteger("jsr166.suiteRuns", 1);
177	+
178	+	/**
179	+	* The scaling factor to apply to standard delays used in tests.
180	+	*/
181	+	private static final int delayFactor =
182	+	Integer.getInteger("jsr166.delay.factor", 1);
183	+
184	+	public JSR166TestCase() { super(); }
185	+	public JSR166TestCase(String name) { super(name); }
186	+
187	+	/**
188	+	* A filter for tests to run, matching strings of the form
189	+	* methodName(className), e.g. "testInvokeAll5(ForkJoinPoolTest)"
190	+	* Usefully combined with jsr166.runsPerTest.
191	+	*/
192	+	private static final Pattern methodFilter = methodFilter();
193	+
194	+	private static Pattern methodFilter() {
195	+	String regex = System.getProperty("jsr166.methodFilter");
196	+	return (regex == null) ? null : Pattern.compile(regex);
197	+	}
198	+
199	+	// Instrumentation to debug very rare, but very annoying hung test runs.
200	+	static volatile TestCase currentTestCase;
201	+	// static volatile int currentRun = 0;
202	+	static {
203	+	Runnable checkForWedgedTest = new Runnable() { public void run() {
204	+	// Avoid spurious reports with enormous runsPerTest.
205	+	// A single test case run should never take more than 1 second.
206	+	// But let's cap it at the high end too ...
207	+	final int timeoutMinutes =
208	+	Math.min(15, Math.max(runsPerTest / 60, 1));
209	+	for (TestCase lastTestCase = currentTestCase;;) {
210	+	try { MINUTES.sleep(timeoutMinutes); }
211	+	catch (InterruptedException unexpected) { break; }
212	+	if (lastTestCase == currentTestCase) {
213	+	System.err.printf(
214	+	"Looks like we're stuck running test: %s%n",
215	+	lastTestCase);
216	+	//                     System.err.printf(
217	+	//                         "Looks like we're stuck running test: %s (%d/%d)%n",
218	+	//                         lastTestCase, currentRun, runsPerTest);
219	+	//                     System.err.println("availableProcessors=" +
220	+	//                         Runtime.getRuntime().availableProcessors());
221	+	//                     System.err.printf("cpu model = %s%n", cpuModel());
222	+	dumpTestThreads();
223	+	// one stack dump is probably enough; more would be spam
224	+	break;
225	+	}
226	+	lastTestCase = currentTestCase;
227	+	}}};
228	+	Thread thread = new Thread(checkForWedgedTest, "checkForWedgedTest");
229	+	thread.setDaemon(true);
230	+	thread.start();
231	+	}
232	+
233	+	//     public static String cpuModel() {
234	+	//         try {
235	+	//             Matcher matcher = Pattern.compile("model name\\s*: (.*)")
236	+	//                 .matcher(new String(
237	+	//                      Files.readAllBytes(Paths.get("/proc/cpuinfo")), "UTF-8"));
238	+	//             matcher.find();
239	+	//             return matcher.group(1);
240	+	//         } catch (Exception ex) { return null; }
241	+	//     }
242	+
243	+	public void runBare() throws Throwable {
244	+	currentTestCase = this;
245	+	if (methodFilter == null
246	+	|| methodFilter.matcher(toString()).find())
247	+	super.runBare();
248	+	}
249	+
250	+	protected void runTest() throws Throwable {
251	+	for (int i = 0; i < runsPerTest; i++) {
252	+	// currentRun = i;
253	+	if (profileTests)
254	+	runTestProfiled();
255	+	else
256	+	super.runTest();
257	+	}
258	+	}
259	+
260	+	protected void runTestProfiled() throws Throwable {
261	+	for (int i = 0; i < 2; i++) {
262	+	long startTime = System.nanoTime();
263	+	super.runTest();
264	+	long elapsedMillis = millisElapsedSince(startTime);
265	+	if (elapsedMillis < profileThreshold)
266	+	break;
267	+	// Never report first run of any test; treat it as a
268	+	// warmup run, notably to trigger all needed classloading,
269	+	if (i > 0)
270	+	System.out.printf("%n%s: %d%n", toString(), elapsedMillis);
271	+	}
272	+	}
273	+
274	+	/**
275	+	* Runs all JSR166 unit tests using junit.textui.TestRunner.
276	+	*/
277	+	public static void main(String[] args) {
278	+	main(suite(), args);
279	+	}
280	+
281	+	static class PithyResultPrinter extends junit.textui.ResultPrinter {
282	+	PithyResultPrinter(java.io.PrintStream writer) { super(writer); }
283	+	long runTime;
284	+	public void startTest(Test test) {}
285	+	protected void printHeader(long runTime) {
286	+	this.runTime = runTime; // defer printing for later
287	+	}
288	+	protected void printFooter(TestResult result) {
289	+	if (result.wasSuccessful()) {
290	+	getWriter().println("OK (" + result.runCount() + " tests)"
291	+	+ "  Time: " + elapsedTimeAsString(runTime));
292	+	} else {
293	+	getWriter().println("Time: " + elapsedTimeAsString(runTime));
294	+	super.printFooter(result);
295	+	}
296	+	}
297	+	}
298	+
299	+	/**
300	+	* Returns a TestRunner that doesn't bother with unnecessary
301	+	* fluff, like printing a "." for each test case.
302	+	*/
303	+	static junit.textui.TestRunner newPithyTestRunner() {
304	+	junit.textui.TestRunner runner = new junit.textui.TestRunner();
305	+	runner.setPrinter(new PithyResultPrinter(System.out));
306	+	return runner;
307	+	}
308	+
309	+	/**
310	+	* Runs all unit tests in the given test suite.
311	+	* Actual behavior influenced by jsr166.* system properties.
312	+	*/
313	+	static void main(Test suite, String[] args) {
314	+	if (useSecurityManager) {
315	+	System.err.println("Setting a permissive security manager");
316	+	Policy.setPolicy(permissivePolicy());
317	+	System.setSecurityManager(new SecurityManager());
318	+	}
319	+	for (int i = 0; i < suiteRuns; i++) {
320	+	TestResult result = newPithyTestRunner().doRun(suite);
321	+	if (!result.wasSuccessful())
322	+	System.exit(1);
323	+	System.gc();
324	+	System.runFinalization();
325	+	}
326	+	}
327	+
328	+	public static TestSuite newTestSuite(Object... suiteOrClasses) {
329	+	TestSuite suite = new TestSuite();
330	+	for (Object suiteOrClass : suiteOrClasses) {
331	+	if (suiteOrClass instanceof TestSuite)
332	+	suite.addTest((TestSuite) suiteOrClass);
333	+	else if (suiteOrClass instanceof Class)
334	+	suite.addTest(new TestSuite((Class<?>) suiteOrClass));
335	+	else
336	+	throw new ClassCastException("not a test suite or class");
337	+	}
338	+	return suite;
339	+	}
340	+
341	+	public static void addNamedTestClasses(TestSuite suite,
342	+	String... testClassNames) {
343	+	for (String testClassName : testClassNames) {
344	+	try {
345	+	Class<?> testClass = Class.forName(testClassName);
346	+	Method m = testClass.getDeclaredMethod("suite",
347	+	new Class<?>[0]);
348	+	suite.addTest(newTestSuite((Test)m.invoke(null)));
349	+	} catch (Exception e) {
350	+	throw new Error("Missing test class", e);
351	+	}
352	+	}
353	+	}
354	+
355	+	public static final double JAVA_CLASS_VERSION;
356	+	public static final String JAVA_SPECIFICATION_VERSION;
357	+	static {
358	+	try {
359	+	JAVA_CLASS_VERSION = java.security.AccessController.doPrivileged(
360	+	new java.security.PrivilegedAction<Double>() {
361	+	public Double run() {
362	+	return Double.valueOf(System.getProperty("java.class.version"));}});
363	+	JAVA_SPECIFICATION_VERSION = java.security.AccessController.doPrivileged(
364	+	new java.security.PrivilegedAction<String>() {
365	+	public String run() {
366	+	return System.getProperty("java.specification.version");}});
367	+	} catch (Throwable t) {
368	+	throw new Error(t);
369	+	}
370	+	}
371	+
372	+	public static boolean atLeastJava6() { return JAVA_CLASS_VERSION >= 50.0; }
373	+	public static boolean atLeastJava7() { return JAVA_CLASS_VERSION >= 51.0; }
374	+	public static boolean atLeastJava8() { return JAVA_CLASS_VERSION >= 52.0; }
375	+	public static boolean atLeastJava9() {
376	+	return JAVA_CLASS_VERSION >= 53.0
377	+	// As of 2015-09, java9 still uses 52.0 class file version
378	+	|| JAVA_SPECIFICATION_VERSION.matches("^(1\\.)?(9|[0-9][0-9])$");
379	+	}
380	+	public static boolean atLeastJava10() {
381	+	return JAVA_CLASS_VERSION >= 54.0
382	+	|| JAVA_SPECIFICATION_VERSION.matches("^(1\\.)?[0-9][0-9]$");
383	+	}
384	+
385	+	/**
386	+	* Collects all JSR166 unit tests as one suite.
387	+	*/
388	+	public static Test suite() {
389	+	// Java7+ test classes
390	+	TestSuite suite = newTestSuite(
391	+	ForkJoinPoolTest.suite(),
392	+	ForkJoinTaskTest.suite(),
393	+	RecursiveActionTest.suite(),
394	+	RecursiveTaskTest.suite(),
395	+	LinkedTransferQueueTest.suite(),
396	+	PhaserTest.suite(),
397	+	ThreadLocalRandomTest.suite(),
398	+	AbstractExecutorServiceTest.suite(),
399	+	AbstractQueueTest.suite(),
400	+	AbstractQueuedSynchronizerTest.suite(),
401	+	AbstractQueuedLongSynchronizerTest.suite(),
402	+	ArrayBlockingQueueTest.suite(),
403	+	ArrayDequeTest.suite(),
404	+	AtomicBooleanTest.suite(),
405	+	AtomicIntegerArrayTest.suite(),
406	+	AtomicIntegerFieldUpdaterTest.suite(),
407	+	AtomicIntegerTest.suite(),
408	+	AtomicLongArrayTest.suite(),
409	+	AtomicLongFieldUpdaterTest.suite(),
410	+	AtomicLongTest.suite(),
411	+	AtomicMarkableReferenceTest.suite(),
412	+	AtomicReferenceArrayTest.suite(),
413	+	AtomicReferenceFieldUpdaterTest.suite(),
414	+	AtomicReferenceTest.suite(),
415	+	AtomicStampedReferenceTest.suite(),
416	+	ConcurrentHashMapTest.suite(),
417	+	ConcurrentLinkedDequeTest.suite(),
418	+	ConcurrentLinkedQueueTest.suite(),
419	+	ConcurrentSkipListMapTest.suite(),
420	+	ConcurrentSkipListSubMapTest.suite(),
421	+	ConcurrentSkipListSetTest.suite(),
422	+	ConcurrentSkipListSubSetTest.suite(),
423	+	CopyOnWriteArrayListTest.suite(),
424	+	CopyOnWriteArraySetTest.suite(),
425	+	CountDownLatchTest.suite(),
426	+	CyclicBarrierTest.suite(),
427	+	DelayQueueTest.suite(),
428	+	EntryTest.suite(),
429	+	ExchangerTest.suite(),
430	+	ExecutorsTest.suite(),
431	+	ExecutorCompletionServiceTest.suite(),
432	+	FutureTaskTest.suite(),
433	+	LinkedBlockingDequeTest.suite(),
434	+	LinkedBlockingQueueTest.suite(),
435	+	LinkedListTest.suite(),
436	+	LockSupportTest.suite(),
437	+	PriorityBlockingQueueTest.suite(),
438	+	PriorityQueueTest.suite(),
439	+	ReentrantLockTest.suite(),
440	+	ReentrantReadWriteLockTest.suite(),
441	+	ScheduledExecutorTest.suite(),
442	+	ScheduledExecutorSubclassTest.suite(),
443	+	SemaphoreTest.suite(),
444	+	SynchronousQueueTest.suite(),
445	+	SystemTest.suite(),
446	+	ThreadLocalTest.suite(),
447	+	ThreadPoolExecutorTest.suite(),
448	+	ThreadPoolExecutorSubclassTest.suite(),
449	+	ThreadTest.suite(),
450	+	TimeUnitTest.suite(),
451	+	TreeMapTest.suite(),
452	+	TreeSetTest.suite(),
453	+	TreeSubMapTest.suite(),
454	+	TreeSubSetTest.suite());
455	+
456	+	// Java8+ test classes
457	+	if (atLeastJava8()) {
458	+	String[] java8TestClassNames = {
459	+	"Atomic8Test",
460	+	"CompletableFutureTest",
461	+	"ConcurrentHashMap8Test",
462	+	"CountedCompleterTest",
463	+	"DoubleAccumulatorTest",
464	+	"DoubleAdderTest",
465	+	"ForkJoinPool8Test",
466	+	"ForkJoinTask8Test",
467	+	"LongAccumulatorTest",
468	+	"LongAdderTest",
469	+	"SplittableRandomTest",
470	+	"StampedLockTest",
471	+	"SubmissionPublisherTest",
472	+	"ThreadLocalRandom8Test",
473	+	};
474	+	addNamedTestClasses(suite, java8TestClassNames);
475	+	}
476	+
477	+	// Java9+ test classes
478	+	if (atLeastJava9()) {
479	+	String[] java9TestClassNames = {
480	+	// Currently empty, but expecting varhandle tests
481	+	};
482	+	addNamedTestClasses(suite, java9TestClassNames);
483	+	}
484	+
485	+	return suite;
486	+	}
487	+
488	+	/** Returns list of junit-style test method names in given class. */
489	+	public static ArrayList<String> testMethodNames(Class<?> testClass) {
490	+	Method[] methods = testClass.getDeclaredMethods();
491	+	ArrayList<String> names = new ArrayList<String>(methods.length);
492	+	for (Method method : methods) {
493	+	if (method.getName().startsWith("test")
494	+	&& Modifier.isPublic(method.getModifiers())
495	+	// method.getParameterCount() requires jdk8+
496	+	&& method.getParameterTypes().length == 0) {
497	+	names.add(method.getName());
498	+	}
499	+	}
500	+	return names;
501	+	}
502	+
503	+	/**
504	+	* Returns junit-style testSuite for the given test class, but
505	+	* parameterized by passing extra data to each test.
506	+	*/
507	+	public static <ExtraData> Test parameterizedTestSuite
508	+	(Class<? extends JSR166TestCase> testClass,
509	+	Class<ExtraData> dataClass,
510	+	ExtraData data) {
511	+	try {
512	+	TestSuite suite = new TestSuite();
513	+	Constructor c =
514	+	testClass.getDeclaredConstructor(dataClass, String.class);
515	+	for (String methodName : testMethodNames(testClass))
516	+	suite.addTest((Test) c.newInstance(data, methodName));
517	+	return suite;
518	+	} catch (Exception e) {
519	+	throw new Error(e);
520	+	}
521	+	}
522	+
523	+	/**
524	+	* Returns junit-style testSuite for the jdk8 extension of the
525	+	* given test class, but parameterized by passing extra data to
526	+	* each test.  Uses reflection to allow compilation in jdk7.
527	+	*/
528	+	public static <ExtraData> Test jdk8ParameterizedTestSuite
529	+	(Class<? extends JSR166TestCase> testClass,
530	+	Class<ExtraData> dataClass,
531	+	ExtraData data) {
532	+	if (atLeastJava8()) {
533	+	String name = testClass.getName();
534	+	String name8 = name.replaceAll("Test$", "8Test");
535	+	if (name.equals(name8)) throw new Error(name);
536	+	try {
537	+	return (Test)
538	+	Class.forName(name8)
539	+	.getMethod("testSuite", new Class[] { dataClass })
540	+	.invoke(null, data);
541	+	} catch (Exception e) {
542	+	throw new Error(e);
543	+	}
544	+	} else {
545	+	return new TestSuite();
546	+	}
547	+	}
548	+
549	+	// Delays for timing-dependent tests, in milliseconds.
550
551		public static long SHORT_DELAY_MS;
552		public static long SMALL_DELAY_MS;
553		public static long MEDIUM_DELAY_MS;
554		public static long LONG_DELAY_MS;
555
61	–
556		/**
557	<	* Return the shortest timed delay. This could
558	<	* be reimplmented to use for example a Property.
559	<	*/
557	>	* Returns the shortest timed delay. This can be scaled up for
558	>	* slow machines using the jsr166.delay.factor system property.
559	>	*/
560		protected long getShortDelay() {
561	<	return 50;
561	>	return 50 * delayFactor;
562		}
563
70	–
564		/**
565	<	* Set delays as multiples fo SHORT_DELAY.
565	>	* Sets delays as multiples of SHORT_DELAY.
566		*/
567	<	protected  void setDelays() {
567	>	protected void setDelays() {
568		SHORT_DELAY_MS = getShortDelay();
569	<	SMALL_DELAY_MS = SHORT_DELAY_MS * 5;
569	>	SMALL_DELAY_MS  = SHORT_DELAY_MS * 5;
570		MEDIUM_DELAY_MS = SHORT_DELAY_MS * 10;
571	<	LONG_DELAY_MS = SHORT_DELAY_MS * 50;
571	>	LONG_DELAY_MS   = SHORT_DELAY_MS * 200;
572	>	}
573	>
574	>	/**
575	>	* Returns a timeout in milliseconds to be used in tests that
576	>	* verify that operations block or time out.
577	>	*/
578	>	long timeoutMillis() {
579	>	return SHORT_DELAY_MS / 4;
580	>	}
581	>
582	>	/**
583	>	* Returns a new Date instance representing a time at least
584	>	* delayMillis milliseconds in the future.
585	>	*/
586	>	Date delayedDate(long delayMillis) {
587	>	// Add 1 because currentTimeMillis is known to round into the past.
588	>	return new Date(System.currentTimeMillis() + delayMillis + 1);
589		}
590
591		/**
592	<	* Flag set true if any threadAssert methods fail
592	>	* The first exception encountered if any threadAssertXXX method fails.
593		*/
594	<	protected volatile boolean threadFailed;
594	>	private final AtomicReference<Throwable> threadFailure
595	>	= new AtomicReference<Throwable>(null);
596
597		/**
598	<	* Initialize test to indicat that no thread assertions have failed
598	>	* Records an exception so that it can be rethrown later in the test
599	>	* harness thread, triggering a test case failure.  Only the first
600	>	* failure is recorded; subsequent calls to this method from within
601	>	* the same test have no effect.
602		*/
603	<	public void setUp() {
603	>	public void threadRecordFailure(Throwable t) {
604	>	System.err.println(t);
605	>	dumpTestThreads();
606	>	threadFailure.compareAndSet(null, t);
607	>	}
608	>
609	>	public void setUp() {
610		setDelays();
611	<	threadFailed = false;
611	>	}
612	>
613	>	void tearDownFail(String format, Object... args) {
614	>	String msg = toString() + ": " + String.format(format, args);
615	>	System.err.println(msg);
616	>	dumpTestThreads();
617	>	throw new AssertionFailedError(msg);
618	>	}
619	>
620	>	/**
621	>	* Extra checks that get done for all test cases.
622	>	*
623	>	* Triggers test case failure if any thread assertions have failed,
624	>	* by rethrowing, in the test harness thread, any exception recorded
625	>	* earlier by threadRecordFailure.
626	>	*
627	>	* Triggers test case failure if interrupt status is set in the main thread.
628	>	*/
629	>	public void tearDown() throws Exception {
630	>	Throwable t = threadFailure.getAndSet(null);
631	>	if (t != null) {
632	>	if (t instanceof Error)
633	>	throw (Error) t;
634	>	else if (t instanceof RuntimeException)
635	>	throw (RuntimeException) t;
636	>	else if (t instanceof Exception)
637	>	throw (Exception) t;
638	>	else {
639	>	AssertionFailedError afe =
640	>	new AssertionFailedError(t.toString());
641	>	afe.initCause(t);
642	>	throw afe;
643	>	}
644	>	}
645	>
646	>	if (Thread.interrupted())
647	>	tearDownFail("interrupt status set in main thread");
648	>
649	>	checkForkJoinPoolThreadLeaks();
650		}
651
652		/**
653	<	* Trigger test case failure if any thread assertions have failed
653	>	* Finds missing PoolCleaners
654		*/
655	<	public void tearDown() {
656	<	assertFalse(threadFailed);
655	>	void checkForkJoinPoolThreadLeaks() throws InterruptedException {
656	>	Thread[] survivors = new Thread[7];
657	>	int count = Thread.enumerate(survivors);
658	>	for (int i = 0; i < count; i++) {
659	>	Thread thread = survivors[i];
660	>	String name = thread.getName();
661	>	if (name.startsWith("ForkJoinPool-")) {
662	>	// give thread some time to terminate
663	>	thread.join(LONG_DELAY_MS);
664	>	if (thread.isAlive())
665	>	tearDownFail("Found leaked ForkJoinPool thread thread=%s",
666	>	thread);
667	>	}
668	>	}
669	>
670	>	if (!ForkJoinPool.commonPool()
671	>	.awaitQuiescence(LONG_DELAY_MS, MILLISECONDS))
672	>	tearDownFail("ForkJoin common pool thread stuck");
673		}
674
675	+	/**
676	+	* Just like fail(reason), but additionally recording (using
677	+	* threadRecordFailure) any AssertionFailedError thrown, so that
678	+	* the current testcase will fail.
679	+	*/
680		public void threadFail(String reason) {
681	<	threadFailed = true;
682	<	fail(reason);
681	>	try {
682	>	fail(reason);
683	>	} catch (AssertionFailedError t) {
684	>	threadRecordFailure(t);
685	>	throw t;
686	>	}
687		}
688
689	+	/**
690	+	* Just like assertTrue(b), but additionally recording (using
691	+	* threadRecordFailure) any AssertionFailedError thrown, so that
692	+	* the current testcase will fail.
693	+	*/
694		public void threadAssertTrue(boolean b) {
695	<	if (!b) {
108	<	threadFailed = true;
695	>	try {
696		assertTrue(b);
697	+	} catch (AssertionFailedError t) {
698	+	threadRecordFailure(t);
699	+	throw t;
700		}
701		}
702	+
703	+	/**
704	+	* Just like assertFalse(b), but additionally recording (using
705	+	* threadRecordFailure) any AssertionFailedError thrown, so that
706	+	* the current testcase will fail.
707	+	*/
708		public void threadAssertFalse(boolean b) {
709	<	if (b) {
114	<	threadFailed = true;
709	>	try {
710		assertFalse(b);
711	+	} catch (AssertionFailedError t) {
712	+	threadRecordFailure(t);
713	+	throw t;
714		}
715		}
716	+
717	+	/**
718	+	* Just like assertNull(x), but additionally recording (using
719	+	* threadRecordFailure) any AssertionFailedError thrown, so that
720	+	* the current testcase will fail.
721	+	*/
722		public void threadAssertNull(Object x) {
723	<	if (x != null) {
120	<	threadFailed = true;
723	>	try {
724		assertNull(x);
725	+	} catch (AssertionFailedError t) {
726	+	threadRecordFailure(t);
727	+	throw t;
728		}
729		}
730	+
731	+	/**
732	+	* Just like assertEquals(x, y), but additionally recording (using
733	+	* threadRecordFailure) any AssertionFailedError thrown, so that
734	+	* the current testcase will fail.
735	+	*/
736		public void threadAssertEquals(long x, long y) {
737	<	if (x != y) {
126	<	threadFailed = true;
737	>	try {
738		assertEquals(x, y);
739	+	} catch (AssertionFailedError t) {
740	+	threadRecordFailure(t);
741	+	throw t;
742		}
743		}
744	+
745	+	/**
746	+	* Just like assertEquals(x, y), but additionally recording (using
747	+	* threadRecordFailure) any AssertionFailedError thrown, so that
748	+	* the current testcase will fail.
749	+	*/
750		public void threadAssertEquals(Object x, Object y) {
751	<	if (x != y && (x == null || !x.equals(y))) {
132	<	threadFailed = true;
751	>	try {
752		assertEquals(x, y);
753	+	} catch (AssertionFailedError fail) {
754	+	threadRecordFailure(fail);
755	+	throw fail;
756	+	} catch (Throwable fail) {
757	+	threadUnexpectedException(fail);
758	+	}
759	+	}
760	+
761	+	/**
762	+	* Just like assertSame(x, y), but additionally recording (using
763	+	* threadRecordFailure) any AssertionFailedError thrown, so that
764	+	* the current testcase will fail.
765	+	*/
766	+	public void threadAssertSame(Object x, Object y) {
767	+	try {
768	+	assertSame(x, y);
769	+	} catch (AssertionFailedError fail) {
770	+	threadRecordFailure(fail);
771	+	throw fail;
772		}
773		}
774
775	+	/**
776	+	* Calls threadFail with message "should throw exception".
777	+	*/
778		public void threadShouldThrow() {
779	<	threadFailed = true;
780	<	fail("should throw exception");
779	>	threadFail("should throw exception");
780	>	}
781	>
782	>	/**
783	>	* Calls threadFail with message "should throw" + exceptionName.
784	>	*/
785	>	public void threadShouldThrow(String exceptionName) {
786	>	threadFail("should throw " + exceptionName);
787	>	}
788	>
789	>	/**
790	>	* Records the given exception using {@link #threadRecordFailure},
791	>	* then rethrows the exception, wrapping it in an
792	>	* AssertionFailedError if necessary.
793	>	*/
794	>	public void threadUnexpectedException(Throwable t) {
795	>	threadRecordFailure(t);
796	>	t.printStackTrace();
797	>	if (t instanceof RuntimeException)
798	>	throw (RuntimeException) t;
799	>	else if (t instanceof Error)
800	>	throw (Error) t;
801	>	else {
802	>	AssertionFailedError afe =
803	>	new AssertionFailedError("unexpected exception: " + t);
804	>	afe.initCause(t);
805	>	throw afe;
806	>	}
807	>	}
808	>
809	>	/**
810	>	* Delays, via Thread.sleep, for the given millisecond delay, but
811	>	* if the sleep is shorter than specified, may re-sleep or yield
812	>	* until time elapses.  Ensures that the given time, as measured
813	>	* by System.nanoTime(), has elapsed.
814	>	*/
815	>	static void delay(long millis) throws InterruptedException {
816	>	long nanos = millis * (1000 * 1000);
817	>	final long wakeupTime = System.nanoTime() + nanos;
818	>	do {
819	>	if (millis > 0L)
820	>	Thread.sleep(millis);
821	>	else // too short to sleep
822	>	Thread.yield();
823	>	nanos = wakeupTime - System.nanoTime();
824	>	millis = nanos / (1000 * 1000);
825	>	} while (nanos >= 0L);
826	>	}
827	>
828	>	/**
829	>	* Allows use of try-with-resources with per-test thread pools.
830	>	*/
831	>	class PoolCleaner implements AutoCloseable {
832	>	private final ExecutorService pool;
833	>	public PoolCleaner(ExecutorService pool) { this.pool = pool; }
834	>	public void close() { joinPool(pool); }
835	>	}
836	>
837	>	/**
838	>	* An extension of PoolCleaner that has an action to release the pool.
839	>	*/
840	>	class PoolCleanerWithReleaser extends PoolCleaner {
841	>	private final Runnable releaser;
842	>	public PoolCleanerWithReleaser(ExecutorService pool, Runnable releaser) {
843	>	super(pool);
844	>	this.releaser = releaser;
845	>	}
846	>	public void close() {
847	>	try {
848	>	releaser.run();
849	>	} finally {
850	>	super.close();
851	>	}
852	>	}
853		}
854
855	<	public void threadUnexpectedException() {
856	<	threadFailed = true;
144	<	fail("Unexpected exception");
855	>	PoolCleaner cleaner(ExecutorService pool) {
856	>	return new PoolCleaner(pool);
857		}
858
859	+	PoolCleaner cleaner(ExecutorService pool, Runnable releaser) {
860	+	return new PoolCleanerWithReleaser(pool, releaser);
861	+	}
862	+
863	+	PoolCleaner cleaner(ExecutorService pool, CountDownLatch latch) {
864	+	return new PoolCleanerWithReleaser(pool, releaser(latch));
865	+	}
866	+
867	+	Runnable releaser(final CountDownLatch latch) {
868	+	return new Runnable() { public void run() {
869	+	do { latch.countDown(); }
870	+	while (latch.getCount() > 0);
871	+	}};
872	+	}
873
874		/**
875	<	* Wait out termination of a thread pool or fail doing so
875	>	* Waits out termination of a thread pool or fails doing so.
876		*/
877	<	public void joinPool(ExecutorService exec) {
877	>	void joinPool(ExecutorService pool) {
878		try {
879	<	exec.shutdown();
880	<	assertTrue(exec.awaitTermination(LONG_DELAY_MS, TimeUnit.MILLISECONDS));
881	<	} catch(InterruptedException ie) {
882	<	fail("Unexpected exception");
879	>	pool.shutdown();
880	>	if (!pool.awaitTermination(2 * LONG_DELAY_MS, MILLISECONDS)) {
881	>	try {
882	>	threadFail("ExecutorService " + pool +
883	>	" did not terminate in a timely manner");
884	>	} finally {
885	>	// last resort, for the benefit of subsequent tests
886	>	pool.shutdownNow();
887	>	pool.awaitTermination(MEDIUM_DELAY_MS, MILLISECONDS);
888	>	}
889	>	}
890	>	} catch (SecurityException ok) {
891	>	// Allowed in case test doesn't have privs
892	>	} catch (InterruptedException fail) {
893	>	threadFail("Unexpected InterruptedException");
894		}
895		}
896
897	<
897	>	/** Like Runnable, but with the freedom to throw anything */
898	>	interface Action { public void run() throws Throwable; }
899	>
900	>	/**
901	>	* Runs all the given actions in parallel, failing if any fail.
902	>	* Useful for running multiple variants of tests that are
903	>	* necessarily individually slow because they must block.
904	>	*/
905	>	void testInParallel(Action ... actions) {
906	>	ExecutorService pool = Executors.newCachedThreadPool();
907	>	try (PoolCleaner cleaner = cleaner(pool)) {
908	>	ArrayList<Future<?>> futures = new ArrayList<>(actions.length);
909	>	for (final Action action : actions)
910	>	futures.add(pool.submit(new CheckedRunnable() {
911	>	public void realRun() throws Throwable { action.run();}}));
912	>	for (Future<?> future : futures)
913	>	try {
914	>	assertNull(future.get(LONG_DELAY_MS, MILLISECONDS));
915	>	} catch (ExecutionException ex) {
916	>	threadUnexpectedException(ex.getCause());
917	>	} catch (Exception ex) {
918	>	threadUnexpectedException(ex);
919	>	}
920	>	}
921	>	}
922	>
923	>	/**
924	>	* A debugging tool to print stack traces of most threads, as jstack does.
925	>	* Uninteresting threads are filtered out.
926	>	*/
927	>	static void dumpTestThreads() {
928	>	ThreadMXBean threadMXBean = ManagementFactory.getThreadMXBean();
929	>	System.err.println("------ stacktrace dump start ------");
930	>	for (ThreadInfo info : threadMXBean.dumpAllThreads(true, true)) {
931	>	String name = info.getThreadName();
932	>	if ("Signal Dispatcher".equals(name))
933	>	continue;
934	>	if ("Reference Handler".equals(name)
935	>	&& info.getLockName().startsWith("java.lang.ref.Reference$Lock"))
936	>	continue;
937	>	if ("Finalizer".equals(name)
938	>	&& info.getLockName().startsWith("java.lang.ref.ReferenceQueue$Lock"))
939	>	continue;
940	>	if ("checkForWedgedTest".equals(name))
941	>	continue;
942	>	System.err.print(info);
943	>	}
944	>	System.err.println("------ stacktrace dump end ------");
945	>	}
946	>
947	>	/**
948	>	* Checks that thread does not terminate within the default
949	>	* millisecond delay of {@code timeoutMillis()}.
950	>	*/
951	>	void assertThreadStaysAlive(Thread thread) {
952	>	assertThreadStaysAlive(thread, timeoutMillis());
953	>	}
954	>
955	>	/**
956	>	* Checks that thread does not terminate within the given millisecond delay.
957	>	*/
958	>	void assertThreadStaysAlive(Thread thread, long millis) {
959	>	try {
960	>	// No need to optimize the failing case via Thread.join.
961	>	delay(millis);
962	>	assertTrue(thread.isAlive());
963	>	} catch (InterruptedException fail) {
964	>	threadFail("Unexpected InterruptedException");
965	>	}
966	>	}
967	>
968	>	/**
969	>	* Checks that the threads do not terminate within the default
970	>	* millisecond delay of {@code timeoutMillis()}.
971	>	*/
972	>	void assertThreadsStayAlive(Thread... threads) {
973	>	assertThreadsStayAlive(timeoutMillis(), threads);
974	>	}
975	>
976	>	/**
977	>	* Checks that the threads do not terminate within the given millisecond delay.
978	>	*/
979	>	void assertThreadsStayAlive(long millis, Thread... threads) {
980	>	try {
981	>	// No need to optimize the failing case via Thread.join.
982	>	delay(millis);
983	>	for (Thread thread : threads)
984	>	assertTrue(thread.isAlive());
985	>	} catch (InterruptedException fail) {
986	>	threadFail("Unexpected InterruptedException");
987	>	}
988	>	}
989	>
990	>	/**
991	>	* Checks that future.get times out, with the default timeout of
992	>	* {@code timeoutMillis()}.
993	>	*/
994	>	void assertFutureTimesOut(Future future) {
995	>	assertFutureTimesOut(future, timeoutMillis());
996	>	}
997	>
998	>	/**
999	>	* Checks that future.get times out, with the given millisecond timeout.
1000	>	*/
1001	>	void assertFutureTimesOut(Future future, long timeoutMillis) {
1002	>	long startTime = System.nanoTime();
1003	>	try {
1004	>	future.get(timeoutMillis, MILLISECONDS);
1005	>	shouldThrow();
1006	>	} catch (TimeoutException success) {
1007	>	} catch (Exception fail) {
1008	>	threadUnexpectedException(fail);
1009	>	} finally { future.cancel(true); }
1010	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
1011	>	}
1012	>
1013	>	/**
1014	>	* Fails with message "should throw exception".
1015	>	*/
1016		public void shouldThrow() {
1017		fail("Should throw exception");
1018		}
1019
1020	<	public void unexpectedException() {
1021	<	fail("Unexpected exception");
1020	>	/**
1021	>	* Fails with message "should throw " + exceptionName.
1022	>	*/
1023	>	public void shouldThrow(String exceptionName) {
1024	>	fail("Should throw " + exceptionName);
1025		}
1026
169	–
1027		/**
1028		* The number of elements to place in collections, arrays, etc.
1029		*/
#	Line 174 | Line 1031 | public class JSR166TestCase extends Test
1031
1032		// Some convenient Integer constants
1033
1034	<	public static final Integer zero = new Integer(0);
1035	<	public static final Integer one = new Integer(1);
1036	<	public static final Integer two = new Integer(2);
1037	<	public static final Integer three  = new Integer(3);
1034	>	public static final Integer zero  = new Integer(0);
1035	>	public static final Integer one   = new Integer(1);
1036	>	public static final Integer two   = new Integer(2);
1037	>	public static final Integer three = new Integer(3);
1038		public static final Integer four  = new Integer(4);
1039		public static final Integer five  = new Integer(5);
1040	<	public static final Integer six = new Integer(6);
1040	>	public static final Integer six   = new Integer(6);
1041		public static final Integer seven = new Integer(7);
1042		public static final Integer eight = new Integer(8);
1043	<	public static final Integer nine = new Integer(9);
1043	>	public static final Integer nine  = new Integer(9);
1044		public static final Integer m1  = new Integer(-1);
1045		public static final Integer m2  = new Integer(-2);
1046		public static final Integer m3  = new Integer(-3);
1047	<	public static final Integer m4 = new Integer(-4);
1048	<	public static final Integer m5 = new Integer(-5);
1047	>	public static final Integer m4  = new Integer(-4);
1048	>	public static final Integer m5  = new Integer(-5);
1049	>	public static final Integer m6  = new Integer(-6);
1050		public static final Integer m10 = new Integer(-10);
1051
1052	+	/**
1053	+	* Runs Runnable r with a security policy that permits precisely
1054	+	* the specified permissions.  If there is no current security
1055	+	* manager, the runnable is run twice, both with and without a
1056	+	* security manager.  We require that any security manager permit
1057	+	* getPolicy/setPolicy.
1058	+	*/
1059	+	public void runWithPermissions(Runnable r, Permission... permissions) {
1060	+	SecurityManager sm = System.getSecurityManager();
1061	+	if (sm == null) {
1062	+	r.run();
1063	+	}
1064	+	runWithSecurityManagerWithPermissions(r, permissions);
1065	+	}
1066
1067	<	// Some convenient Runnable classes
1067	>	/**
1068	>	* Runs Runnable r with a security policy that permits precisely
1069	>	* the specified permissions.  If there is no current security
1070	>	* manager, a temporary one is set for the duration of the
1071	>	* Runnable.  We require that any security manager permit
1072	>	* getPolicy/setPolicy.
1073	>	*/
1074	>	public void runWithSecurityManagerWithPermissions(Runnable r,
1075	>	Permission... permissions) {
1076	>	SecurityManager sm = System.getSecurityManager();
1077	>	if (sm == null) {
1078	>	Policy savedPolicy = Policy.getPolicy();
1079	>	try {
1080	>	Policy.setPolicy(permissivePolicy());
1081	>	System.setSecurityManager(new SecurityManager());
1082	>	runWithSecurityManagerWithPermissions(r, permissions);
1083	>	} finally {
1084	>	System.setSecurityManager(null);
1085	>	Policy.setPolicy(savedPolicy);
1086	>	}
1087	>	} else {
1088	>	Policy savedPolicy = Policy.getPolicy();
1089	>	AdjustablePolicy policy = new AdjustablePolicy(permissions);
1090	>	Policy.setPolicy(policy);
1091
1092	<	public static class NoOpRunnable implements Runnable {
1093	<	public void run() {}
1092	>	try {
1093	>	r.run();
1094	>	} finally {
1095	>	policy.addPermission(new SecurityPermission("setPolicy"));
1096	>	Policy.setPolicy(savedPolicy);
1097	>	}
1098	>	}
1099		}
1100
1101	<	public static class NoOpCallable implements Callable {
1102	<	public Object call() { return Boolean.TRUE; }
1101	>	/**
1102	>	* Runs a runnable without any permissions.
1103	>	*/
1104	>	public void runWithoutPermissions(Runnable r) {
1105	>	runWithPermissions(r);
1106		}
1107
1108	<	public class ShortRunnable implements Runnable {
1109	<	public void run() {
1110	<	try {
1111	<	Thread.sleep(SHORT_DELAY_MS);
1108	>	/**
1109	>	* A security policy where new permissions can be dynamically added
1110	>	* or all cleared.
1111	>	*/
1112	>	public static class AdjustablePolicy extends java.security.Policy {
1113	>	Permissions perms = new Permissions();
1114	>	AdjustablePolicy(Permission... permissions) {
1115	>	for (Permission permission : permissions)
1116	>	perms.add(permission);
1117	>	}
1118	>	void addPermission(Permission perm) { perms.add(perm); }
1119	>	void clearPermissions() { perms = new Permissions(); }
1120	>	public PermissionCollection getPermissions(CodeSource cs) {
1121	>	return perms;
1122	>	}
1123	>	public PermissionCollection getPermissions(ProtectionDomain pd) {
1124	>	return perms;
1125	>	}
1126	>	public boolean implies(ProtectionDomain pd, Permission p) {
1127	>	return perms.implies(p);
1128	>	}
1129	>	public void refresh() {}
1130	>	public String toString() {
1131	>	List<Permission> ps = new ArrayList<Permission>();
1132	>	for (Enumeration<Permission> e = perms.elements(); e.hasMoreElements();)
1133	>	ps.add(e.nextElement());
1134	>	return "AdjustablePolicy with permissions " + ps;
1135	>	}
1136	>	}
1137	>
1138	>	/**
1139	>	* Returns a policy containing all the permissions we ever need.
1140	>	*/
1141	>	public static Policy permissivePolicy() {
1142	>	return new AdjustablePolicy
1143	>	// Permissions j.u.c. needs directly
1144	>	(new RuntimePermission("modifyThread"),
1145	>	new RuntimePermission("getClassLoader"),
1146	>	new RuntimePermission("setContextClassLoader"),
1147	>	// Permissions needed to change permissions!
1148	>	new SecurityPermission("getPolicy"),
1149	>	new SecurityPermission("setPolicy"),
1150	>	new RuntimePermission("setSecurityManager"),
1151	>	// Permissions needed by the junit test harness
1152	>	new RuntimePermission("accessDeclaredMembers"),
1153	>	new PropertyPermission("*", "read"),
1154	>	new java.io.FilePermission("<<ALL FILES>>", "read"));
1155	>	}
1156	>
1157	>	/**
1158	>	* Sleeps until the given time has elapsed.
1159	>	* Throws AssertionFailedError if interrupted.
1160	>	*/
1161	>	void sleep(long millis) {
1162	>	try {
1163	>	delay(millis);
1164	>	} catch (InterruptedException fail) {
1165	>	AssertionFailedError afe =
1166	>	new AssertionFailedError("Unexpected InterruptedException");
1167	>	afe.initCause(fail);
1168	>	throw afe;
1169	>	}
1170	>	}
1171	>
1172	>	/**
1173	>	* Spin-waits up to the specified number of milliseconds for the given
1174	>	* thread to enter a wait state: BLOCKED, WAITING, or TIMED_WAITING.
1175	>	*/
1176	>	void waitForThreadToEnterWaitState(Thread thread, long timeoutMillis) {
1177	>	long startTime = System.nanoTime();
1178	>	for (;;) {
1179	>	Thread.State s = thread.getState();
1180	>	if (s == Thread.State.BLOCKED ||
1181	>	s == Thread.State.WAITING ||
1182	>	s == Thread.State.TIMED_WAITING)
1183	>	return;
1184	>	else if (s == Thread.State.TERMINATED)
1185	>	fail("Unexpected thread termination");
1186	>	else if (millisElapsedSince(startTime) > timeoutMillis) {
1187	>	threadAssertTrue(thread.isAlive());
1188	>	return;
1189		}
1190	<	catch(Exception e) {
1191	<	threadUnexpectedException();
1190	>	Thread.yield();
1191	>	}
1192	>	}
1193	>
1194	>	/**
1195	>	* Waits up to LONG_DELAY_MS for the given thread to enter a wait
1196	>	* state: BLOCKED, WAITING, or TIMED_WAITING.
1197	>	*/
1198	>	void waitForThreadToEnterWaitState(Thread thread) {
1199	>	waitForThreadToEnterWaitState(thread, LONG_DELAY_MS);
1200	>	}
1201	>
1202	>	/**
1203	>	* Returns the number of milliseconds since time given by
1204	>	* startNanoTime, which must have been previously returned from a
1205	>	* call to {@link System#nanoTime()}.
1206	>	*/
1207	>	static long millisElapsedSince(long startNanoTime) {
1208	>	return NANOSECONDS.toMillis(System.nanoTime() - startNanoTime);
1209	>	}
1210	>
1211	>	//     void assertTerminatesPromptly(long timeoutMillis, Runnable r) {
1212	>	//         long startTime = System.nanoTime();
1213	>	//         try {
1214	>	//             r.run();
1215	>	//         } catch (Throwable fail) { threadUnexpectedException(fail); }
1216	>	//         if (millisElapsedSince(startTime) > timeoutMillis/2)
1217	>	//             throw new AssertionFailedError("did not return promptly");
1218	>	//     }
1219	>
1220	>	//     void assertTerminatesPromptly(Runnable r) {
1221	>	//         assertTerminatesPromptly(LONG_DELAY_MS/2, r);
1222	>	//     }
1223	>
1224	>	/**
1225	>	* Checks that timed f.get() returns the expected value, and does not
1226	>	* wait for the timeout to elapse before returning.
1227	>	*/
1228	>	<T> void checkTimedGet(Future<T> f, T expectedValue, long timeoutMillis) {
1229	>	long startTime = System.nanoTime();
1230	>	try {
1231	>	assertEquals(expectedValue, f.get(timeoutMillis, MILLISECONDS));
1232	>	} catch (Throwable fail) { threadUnexpectedException(fail); }
1233	>	if (millisElapsedSince(startTime) > timeoutMillis/2)
1234	>	throw new AssertionFailedError("timed get did not return promptly");
1235	>	}
1236	>
1237	>	<T> void checkTimedGet(Future<T> f, T expectedValue) {
1238	>	checkTimedGet(f, expectedValue, LONG_DELAY_MS);
1239	>	}
1240	>
1241	>	/**
1242	>	* Returns a new started daemon Thread running the given runnable.
1243	>	*/
1244	>	Thread newStartedThread(Runnable runnable) {
1245	>	Thread t = new Thread(runnable);
1246	>	t.setDaemon(true);
1247	>	t.start();
1248	>	return t;
1249	>	}
1250	>
1251	>	/**
1252	>	* Waits for the specified time (in milliseconds) for the thread
1253	>	* to terminate (using {@link Thread#join(long)}), else interrupts
1254	>	* the thread (in the hope that it may terminate later) and fails.
1255	>	*/
1256	>	void awaitTermination(Thread t, long timeoutMillis) {
1257	>	try {
1258	>	t.join(timeoutMillis);
1259	>	} catch (InterruptedException fail) {
1260	>	threadUnexpectedException(fail);
1261	>	} finally {
1262	>	if (t.getState() != Thread.State.TERMINATED) {
1263	>	t.interrupt();
1264	>	threadFail("timed out waiting for thread to terminate");
1265		}
1266		}
1267		}
1268
1269	<	public class ShortInterruptedRunnable implements Runnable {
1270	<	public void run() {
1269	>	/**
1270	>	* Waits for LONG_DELAY_MS milliseconds for the thread to
1271	>	* terminate (using {@link Thread#join(long)}), else interrupts
1272	>	* the thread (in the hope that it may terminate later) and fails.
1273	>	*/
1274	>	void awaitTermination(Thread t) {
1275	>	awaitTermination(t, LONG_DELAY_MS);
1276	>	}
1277	>
1278	>	// Some convenient Runnable classes
1279	>
1280	>	public abstract class CheckedRunnable implements Runnable {
1281	>	protected abstract void realRun() throws Throwable;
1282	>
1283	>	public final void run() {
1284		try {
1285	<	Thread.sleep(SHORT_DELAY_MS);
1286	<	threadShouldThrow();
1285	>	realRun();
1286	>	} catch (Throwable fail) {
1287	>	threadUnexpectedException(fail);
1288		}
1289	<	catch(InterruptedException success) {
1289	>	}
1290	>	}
1291	>
1292	>	public abstract class RunnableShouldThrow implements Runnable {
1293	>	protected abstract void realRun() throws Throwable;
1294	>
1295	>	final Class<?> exceptionClass;
1296	>
1297	>	<T extends Throwable> RunnableShouldThrow(Class<T> exceptionClass) {
1298	>	this.exceptionClass = exceptionClass;
1299	>	}
1300	>
1301	>	public final void run() {
1302	>	try {
1303	>	realRun();
1304	>	threadShouldThrow(exceptionClass.getSimpleName());
1305	>	} catch (Throwable t) {
1306	>	if (! exceptionClass.isInstance(t))
1307	>	threadUnexpectedException(t);
1308		}
1309		}
1310		}
1311
1312	<	public class SmallRunnable implements Runnable {
1313	<	public void run() {
1312	>	public abstract class ThreadShouldThrow extends Thread {
1313	>	protected abstract void realRun() throws Throwable;
1314	>
1315	>	final Class<?> exceptionClass;
1316	>
1317	>	<T extends Throwable> ThreadShouldThrow(Class<T> exceptionClass) {
1318	>	this.exceptionClass = exceptionClass;
1319	>	}
1320	>
1321	>	public final void run() {
1322		try {
1323	<	Thread.sleep(SMALL_DELAY_MS);
1323	>	realRun();
1324	>	threadShouldThrow(exceptionClass.getSimpleName());
1325	>	} catch (Throwable t) {
1326	>	if (! exceptionClass.isInstance(t))
1327	>	threadUnexpectedException(t);
1328		}
1329	<	catch(Exception e) {
1330	<	threadUnexpectedException();
1329	>	}
1330	>	}
1331	>
1332	>	public abstract class CheckedInterruptedRunnable implements Runnable {
1333	>	protected abstract void realRun() throws Throwable;
1334	>
1335	>	public final void run() {
1336	>	try {
1337	>	realRun();
1338	>	threadShouldThrow("InterruptedException");
1339	>	} catch (InterruptedException success) {
1340	>	threadAssertFalse(Thread.interrupted());
1341	>	} catch (Throwable fail) {
1342	>	threadUnexpectedException(fail);
1343		}
1344		}
1345		}
1346
1347	<	public class SmallCallable implements Callable {
1348	<	public Object call() {
1347	>	public abstract class CheckedCallable<T> implements Callable<T> {
1348	>	protected abstract T realCall() throws Throwable;
1349	>
1350	>	public final T call() {
1351		try {
1352	<	Thread.sleep(SMALL_DELAY_MS);
1352	>	return realCall();
1353	>	} catch (Throwable fail) {
1354	>	threadUnexpectedException(fail);
1355	>	return null;
1356		}
1357	<	catch(Exception e) {
1358	<	threadUnexpectedException();
1357	>	}
1358	>	}
1359	>
1360	>	public abstract class CheckedInterruptedCallable<T>
1361	>	implements Callable<T> {
1362	>	protected abstract T realCall() throws Throwable;
1363	>
1364	>	public final T call() {
1365	>	try {
1366	>	T result = realCall();
1367	>	threadShouldThrow("InterruptedException");
1368	>	return result;
1369	>	} catch (InterruptedException success) {
1370	>	threadAssertFalse(Thread.interrupted());
1371	>	} catch (Throwable fail) {
1372	>	threadUnexpectedException(fail);
1373		}
1374	+	return null;
1375	+	}
1376	+	}
1377	+
1378	+	public static class NoOpRunnable implements Runnable {
1379	+	public void run() {}
1380	+	}
1381	+
1382	+	public static class NoOpCallable implements Callable {
1383	+	public Object call() { return Boolean.TRUE; }
1384	+	}
1385	+
1386	+	public static final String TEST_STRING = "a test string";
1387	+
1388	+	public static class StringTask implements Callable<String> {
1389	+	final String value;
1390	+	public StringTask() { this(TEST_STRING); }
1391	+	public StringTask(String value) { this.value = value; }
1392	+	public String call() { return value; }
1393	+	}
1394	+
1395	+	public Callable<String> latchAwaitingStringTask(final CountDownLatch latch) {
1396	+	return new CheckedCallable<String>() {
1397	+	protected String realCall() {
1398	+	try {
1399	+	latch.await();
1400	+	} catch (InterruptedException quittingTime) {}
1401	+	return TEST_STRING;
1402	+	}};
1403	+	}
1404	+
1405	+	public Runnable countDowner(final CountDownLatch latch) {
1406	+	return new CheckedRunnable() {
1407	+	public void realRun() throws InterruptedException {
1408	+	latch.countDown();
1409	+	}};
1410	+	}
1411	+
1412	+	class LatchAwaiter extends CheckedRunnable {
1413	+	static final int NEW = 0;
1414	+	static final int RUNNING = 1;
1415	+	static final int DONE = 2;
1416	+	final CountDownLatch latch;
1417	+	int state = NEW;
1418	+	LatchAwaiter(CountDownLatch latch) { this.latch = latch; }
1419	+	public void realRun() throws InterruptedException {
1420	+	state = 1;
1421	+	await(latch);
1422	+	state = 2;
1423	+	}
1424	+	}
1425	+
1426	+	public LatchAwaiter awaiter(CountDownLatch latch) {
1427	+	return new LatchAwaiter(latch);
1428	+	}
1429	+
1430	+	public void await(CountDownLatch latch) {
1431	+	try {
1432	+	if (!latch.await(LONG_DELAY_MS, MILLISECONDS))
1433	+	fail("timed out waiting for CountDownLatch for "
1434	+	+ (LONG_DELAY_MS/1000) + " sec");
1435	+	} catch (Throwable fail) {
1436	+	threadUnexpectedException(fail);
1437	+	}
1438	+	}
1439	+
1440	+	public void await(Semaphore semaphore) {
1441	+	try {
1442	+	if (!semaphore.tryAcquire(LONG_DELAY_MS, MILLISECONDS))
1443	+	fail("timed out waiting for Semaphore for "
1444	+	+ (LONG_DELAY_MS/1000) + " sec");
1445	+	} catch (Throwable fail) {
1446	+	threadUnexpectedException(fail);
1447	+	}
1448	+	}
1449	+
1450	+	//     /**
1451	+	//      * Spin-waits up to LONG_DELAY_MS until flag becomes true.
1452	+	//      */
1453	+	//     public void await(AtomicBoolean flag) {
1454	+	//         await(flag, LONG_DELAY_MS);
1455	+	//     }
1456	+
1457	+	//     /**
1458	+	//      * Spin-waits up to the specified timeout until flag becomes true.
1459	+	//      */
1460	+	//     public void await(AtomicBoolean flag, long timeoutMillis) {
1461	+	//         long startTime = System.nanoTime();
1462	+	//         while (!flag.get()) {
1463	+	//             if (millisElapsedSince(startTime) > timeoutMillis)
1464	+	//                 throw new AssertionFailedError("timed out");
1465	+	//             Thread.yield();
1466	+	//         }
1467	+	//     }
1468	+
1469	+	public static class NPETask implements Callable<String> {
1470	+	public String call() { throw new NullPointerException(); }
1471	+	}
1472	+
1473	+	public static class CallableOne implements Callable<Integer> {
1474	+	public Integer call() { return one; }
1475	+	}
1476	+
1477	+	public class ShortRunnable extends CheckedRunnable {
1478	+	protected void realRun() throws Throwable {
1479	+	delay(SHORT_DELAY_MS);
1480	+	}
1481	+	}
1482	+
1483	+	public class ShortInterruptedRunnable extends CheckedInterruptedRunnable {
1484	+	protected void realRun() throws InterruptedException {
1485	+	delay(SHORT_DELAY_MS);
1486	+	}
1487	+	}
1488	+
1489	+	public class SmallRunnable extends CheckedRunnable {
1490	+	protected void realRun() throws Throwable {
1491	+	delay(SMALL_DELAY_MS);
1492	+	}
1493	+	}
1494	+
1495	+	public class SmallPossiblyInterruptedRunnable extends CheckedRunnable {
1496	+	protected void realRun() {
1497	+	try {
1498	+	delay(SMALL_DELAY_MS);
1499	+	} catch (InterruptedException ok) {}
1500	+	}
1501	+	}
1502	+
1503	+	public class SmallCallable extends CheckedCallable {
1504	+	protected Object realCall() throws InterruptedException {
1505	+	delay(SMALL_DELAY_MS);
1506		return Boolean.TRUE;
1507		}
1508		}
1509
1510	<	public class SmallInterruptedRunnable implements Runnable {
1510	>	public class MediumRunnable extends CheckedRunnable {
1511	>	protected void realRun() throws Throwable {
1512	>	delay(MEDIUM_DELAY_MS);
1513	>	}
1514	>	}
1515	>
1516	>	public class MediumInterruptedRunnable extends CheckedInterruptedRunnable {
1517	>	protected void realRun() throws InterruptedException {
1518	>	delay(MEDIUM_DELAY_MS);
1519	>	}
1520	>	}
1521	>
1522	>	public Runnable possiblyInterruptedRunnable(final long timeoutMillis) {
1523	>	return new CheckedRunnable() {
1524	>	protected void realRun() {
1525	>	try {
1526	>	delay(timeoutMillis);
1527	>	} catch (InterruptedException ok) {}
1528	>	}};
1529	>	}
1530	>
1531	>	public class MediumPossiblyInterruptedRunnable extends CheckedRunnable {
1532	>	protected void realRun() {
1533	>	try {
1534	>	delay(MEDIUM_DELAY_MS);
1535	>	} catch (InterruptedException ok) {}
1536	>	}
1537	>	}
1538	>
1539	>	public class LongPossiblyInterruptedRunnable extends CheckedRunnable {
1540	>	protected void realRun() {
1541	>	try {
1542	>	delay(LONG_DELAY_MS);
1543	>	} catch (InterruptedException ok) {}
1544	>	}
1545	>	}
1546	>
1547	>	/**
1548	>	* For use as ThreadFactory in constructors
1549	>	*/
1550	>	public static class SimpleThreadFactory implements ThreadFactory {
1551	>	public Thread newThread(Runnable r) {
1552	>	return new Thread(r);
1553	>	}
1554	>	}
1555	>
1556	>	public interface TrackedRunnable extends Runnable {
1557	>	boolean isDone();
1558	>	}
1559	>
1560	>	public static TrackedRunnable trackedRunnable(final long timeoutMillis) {
1561	>	return new TrackedRunnable() {
1562	>	private volatile boolean done = false;
1563	>	public boolean isDone() { return done; }
1564	>	public void run() {
1565	>	try {
1566	>	delay(timeoutMillis);
1567	>	done = true;
1568	>	} catch (InterruptedException ok) {}
1569	>	}
1570	>	};
1571	>	}
1572	>
1573	>	public static class TrackedShortRunnable implements Runnable {
1574	>	public volatile boolean done = false;
1575		public void run() {
1576		try {
1577	<	Thread.sleep(SMALL_DELAY_MS);
1578	<	threadShouldThrow();
1579	<	}
256	<	catch(InterruptedException success) {
257	<	}
1577	>	delay(SHORT_DELAY_MS);
1578	>	done = true;
1579	>	} catch (InterruptedException ok) {}
1580		}
1581		}
1582
1583	+	public static class TrackedSmallRunnable implements Runnable {
1584	+	public volatile boolean done = false;
1585	+	public void run() {
1586	+	try {
1587	+	delay(SMALL_DELAY_MS);
1588	+	done = true;
1589	+	} catch (InterruptedException ok) {}
1590	+	}
1591	+	}
1592
1593	<	public class MediumRunnable implements Runnable {
1593	>	public static class TrackedMediumRunnable implements Runnable {
1594	>	public volatile boolean done = false;
1595		public void run() {
1596		try {
1597	<	Thread.sleep(MEDIUM_DELAY_MS);
1598	<	}
1599	<	catch(Exception e) {
268	<	threadUnexpectedException();
269	<	}
1597	>	delay(MEDIUM_DELAY_MS);
1598	>	done = true;
1599	>	} catch (InterruptedException ok) {}
1600		}
1601		}
1602
1603	<	public class MediumInterruptedRunnable implements Runnable {
1603	>	public static class TrackedLongRunnable implements Runnable {
1604	>	public volatile boolean done = false;
1605		public void run() {
1606		try {
1607	<	Thread.sleep(MEDIUM_DELAY_MS);
1608	<	threadShouldThrow();
1607	>	delay(LONG_DELAY_MS);
1608	>	done = true;
1609	>	} catch (InterruptedException ok) {}
1610	>	}
1611	>	}
1612	>
1613	>	public static class TrackedNoOpRunnable implements Runnable {
1614	>	public volatile boolean done = false;
1615	>	public void run() {
1616	>	done = true;
1617	>	}
1618	>	}
1619	>
1620	>	public static class TrackedCallable implements Callable {
1621	>	public volatile boolean done = false;
1622	>	public Object call() {
1623	>	try {
1624	>	delay(SMALL_DELAY_MS);
1625	>	done = true;
1626	>	} catch (InterruptedException ok) {}
1627	>	return Boolean.TRUE;
1628	>	}
1629	>	}
1630	>
1631	>	/**
1632	>	* Analog of CheckedRunnable for RecursiveAction
1633	>	*/
1634	>	public abstract class CheckedRecursiveAction extends RecursiveAction {
1635	>	protected abstract void realCompute() throws Throwable;
1636	>
1637	>	@Override protected final void compute() {
1638	>	try {
1639	>	realCompute();
1640	>	} catch (Throwable fail) {
1641	>	threadUnexpectedException(fail);
1642		}
1643	<	catch(InterruptedException success) {
1643	>	}
1644	>	}
1645	>
1646	>	/**
1647	>	* Analog of CheckedCallable for RecursiveTask
1648	>	*/
1649	>	public abstract class CheckedRecursiveTask<T> extends RecursiveTask<T> {
1650	>	protected abstract T realCompute() throws Throwable;
1651	>
1652	>	@Override protected final T compute() {
1653	>	try {
1654	>	return realCompute();
1655	>	} catch (Throwable fail) {
1656	>	threadUnexpectedException(fail);
1657	>	return null;
1658		}
1659		}
1660		}
1661
1662	<	public class MediumPossiblyInterruptedRunnable implements Runnable {
1663	<	public void run() {
1662	>	/**
1663	>	* For use as RejectedExecutionHandler in constructors
1664	>	*/
1665	>	public static class NoOpREHandler implements RejectedExecutionHandler {
1666	>	public void rejectedExecution(Runnable r,
1667	>	ThreadPoolExecutor executor) {}
1668	>	}
1669	>
1670	>	/**
1671	>	* A CyclicBarrier that uses timed await and fails with
1672	>	* AssertionFailedErrors instead of throwing checked exceptions.
1673	>	*/
1674	>	public class CheckedBarrier extends CyclicBarrier {
1675	>	public CheckedBarrier(int parties) { super(parties); }
1676	>
1677	>	public int await() {
1678		try {
1679	<	Thread.sleep(MEDIUM_DELAY_MS);
1679	>	return super.await(2 * LONG_DELAY_MS, MILLISECONDS);
1680	>	} catch (TimeoutException timedOut) {
1681	>	throw new AssertionFailedError("timed out");
1682	>	} catch (Exception fail) {
1683	>	AssertionFailedError afe =
1684	>	new AssertionFailedError("Unexpected exception: " + fail);
1685	>	afe.initCause(fail);
1686	>	throw afe;
1687		}
1688	<	catch(InterruptedException success) {
1688	>	}
1689	>	}
1690	>
1691	>	void checkEmpty(BlockingQueue q) {
1692	>	try {
1693	>	assertTrue(q.isEmpty());
1694	>	assertEquals(0, q.size());
1695	>	assertNull(q.peek());
1696	>	assertNull(q.poll());
1697	>	assertNull(q.poll(0, MILLISECONDS));
1698	>	assertEquals(q.toString(), "[]");
1699	>	assertTrue(Arrays.equals(q.toArray(), new Object[0]));
1700	>	assertFalse(q.iterator().hasNext());
1701	>	try {
1702	>	q.element();
1703	>	shouldThrow();
1704	>	} catch (NoSuchElementException success) {}
1705	>	try {
1706	>	q.iterator().next();
1707	>	shouldThrow();
1708	>	} catch (NoSuchElementException success) {}
1709	>	try {
1710	>	q.remove();
1711	>	shouldThrow();
1712	>	} catch (NoSuchElementException success) {}
1713	>	} catch (InterruptedException fail) { threadUnexpectedException(fail); }
1714	>	}
1715	>
1716	>	void assertSerialEquals(Object x, Object y) {
1717	>	assertTrue(Arrays.equals(serialBytes(x), serialBytes(y)));
1718	>	}
1719	>
1720	>	void assertNotSerialEquals(Object x, Object y) {
1721	>	assertFalse(Arrays.equals(serialBytes(x), serialBytes(y)));
1722	>	}
1723	>
1724	>	byte[] serialBytes(Object o) {
1725	>	try {
1726	>	ByteArrayOutputStream bos = new ByteArrayOutputStream();
1727	>	ObjectOutputStream oos = new ObjectOutputStream(bos);
1728	>	oos.writeObject(o);
1729	>	oos.flush();
1730	>	oos.close();
1731	>	return bos.toByteArray();
1732	>	} catch (Throwable fail) {
1733	>	threadUnexpectedException(fail);
1734	>	return new byte[0];
1735	>	}
1736	>	}
1737	>
1738	>	@SuppressWarnings("unchecked")
1739	>	<T> T serialClone(T o) {
1740	>	try {
1741	>	ObjectInputStream ois = new ObjectInputStream
1742	>	(new ByteArrayInputStream(serialBytes(o)));
1743	>	T clone = (T) ois.readObject();
1744	>	assertSame(o.getClass(), clone.getClass());
1745	>	return clone;
1746	>	} catch (Throwable fail) {
1747	>	threadUnexpectedException(fail);
1748	>	return null;
1749	>	}
1750	>	}
1751	>
1752	>	public void assertThrows(Class<? extends Throwable> expectedExceptionClass,
1753	>	Runnable... throwingActions) {
1754	>	for (Runnable throwingAction : throwingActions) {
1755	>	boolean threw = false;
1756	>	try { throwingAction.run(); }
1757	>	catch (Throwable t) {
1758	>	threw = true;
1759	>	if (!expectedExceptionClass.isInstance(t)) {
1760	>	AssertionFailedError afe =
1761	>	new AssertionFailedError
1762	>	("Expected " + expectedExceptionClass.getName() +
1763	>	", got " + t.getClass().getName());
1764	>	afe.initCause(t);
1765	>	threadUnexpectedException(afe);
1766	>	}
1767		}
1768	+	if (!threw)
1769	+	shouldThrow(expectedExceptionClass.getName());
1770		}
1771		}
1772	<
1772	>
1773	>	public void assertIteratorExhausted(Iterator<?> it) {
1774	>	try {
1775	>	it.next();
1776	>	shouldThrow();
1777	>	} catch (NoSuchElementException success) {}
1778	>	assertFalse(it.hasNext());
1779	>	}
1780		}

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