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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 1.178 by jsr166, Fri Oct 23 17:34:47 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	<	* (100, 500, 1000, 5000 MS) but even so, if there is ever any doubt,
98	<	* they can all be increased in one spot to rerun tests on slower
99	<	* platforms</li>
100	<	*
101	<	* <li> All threads generated must be joined inside each test case
102	<	* method (or <tt>fail</tt> to do so) before returning from the
103	<	* method. The {@link joinPool} method can be used to do this when
51	<	* using Executors.</li>
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.
99	>	*
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
116	+	* isolation.
117	+	*
118	+	* <li>The documentation style for testcases is to provide as javadoc
119	+	* a simple sentence or two describing the property that the testcase
120	+	* method purports to test. The javadocs do not say anything about how
121	+	* the property is tested. To find out, read the code.
122	+	*
123	+	* <li>These tests are "conformance tests", and do not attempt to
124	+	* test throughput, latency, scalability or other performance factors
125	+	* (see the separate "jtreg" tests for a set intended to check these
126	+	* for the most central aspects of functionality.) So, most tests use
127	+	* the smallest sensible numbers of threads, collection sizes, etc
128	+	* needed to check basic conformance.
129	+	*
130	+	* <li>The test classes currently do not declare inclusion in
131	+	* any particular package to simplify things for people integrating
132	+	* them in TCK test suites.
133	+	*
134	+	* <li>As a convenience, the {@code main} of this class (JSR166TestCase)
135	+	* runs all JSR166 unit tests.
136	+	*
137	+	* </ul>
138		*/
139		public class JSR166TestCase extends TestCase {
140	+	private static final boolean useSecurityManager =
141	+	Boolean.getBoolean("jsr166.useSecurityManager");
142	+
143	+	protected static final boolean expensiveTests =
144	+	Boolean.getBoolean("jsr166.expensiveTests");
145	+
146	+	/**
147	+	* If true, also run tests that are not part of the official tck
148	+	* because they test unspecified implementation details.
149	+	*/
150	+	protected static final boolean testImplementationDetails =
151	+	Boolean.getBoolean("jsr166.testImplementationDetails");
152	+
153	+	/**
154	+	* If true, report on stdout all "slow" tests, that is, ones that
155	+	* take more than profileThreshold milliseconds to execute.
156	+	*/
157	+	private static final boolean profileTests =
158	+	Boolean.getBoolean("jsr166.profileTests");
159
160		/**
161	<	* Flag set true if any threadAssert methods fail
161	>	* The number of milliseconds that tests are permitted for
162	>	* execution without being reported, when profileTests is set.
163		*/
164	<	protected volatile boolean threadFailed;
164	>	private static final long profileThreshold =
165	>	Long.getLong("jsr166.profileThreshold", 100);
166	>
167	>	/**
168	>	* The number of repetitions per test (for tickling rare bugs).
169	>	*/
170	>	private static final int runsPerTest =
171	>	Integer.getInteger("jsr166.runsPerTest", 1);
172	>
173	>	/**
174	>	* The number of repetitions of the test suite (for finding leaks?).
175	>	*/
176	>	private static final int suiteRuns =
177	>	Integer.getInteger("jsr166.suiteRuns", 1);
178	>
179	>	public JSR166TestCase() { super(); }
180	>	public JSR166TestCase(String name) { super(name); }
181	>
182	>	/**
183	>	* A filter for tests to run, matching strings of the form
184	>	* methodName(className), e.g. "testInvokeAll5(ForkJoinPoolTest)"
185	>	* Usefully combined with jsr166.runsPerTest.
186	>	*/
187	>	private static final Pattern methodFilter = methodFilter();
188	>
189	>	private static Pattern methodFilter() {
190	>	String regex = System.getProperty("jsr166.methodFilter");
191	>	return (regex == null) ? null : Pattern.compile(regex);
192	>	}
193	>
194	>	// Instrumentation to debug very rare, but very annoying hung test runs.
195	>	static volatile TestCase currentTestCase;
196	>	// static volatile int currentRun = 0;
197	>	static {
198	>	Runnable checkForWedgedTest = new Runnable() { public void run() {
199	>	// Avoid spurious reports with enormous runsPerTest.
200	>	// A single test case run should never take more than 1 second.
201	>	// But let's cap it at the high end too ...
202	>	final int timeoutMinutes =
203	>	Math.min(15, Math.max(runsPerTest / 60, 1));
204	>	for (TestCase lastTestCase = currentTestCase;;) {
205	>	try { MINUTES.sleep(timeoutMinutes); }
206	>	catch (InterruptedException unexpected) { break; }
207	>	if (lastTestCase == currentTestCase) {
208	>	System.err.printf(
209	>	"Looks like we're stuck running test: %s%n",
210	>	lastTestCase);
211	>	//                     System.err.printf(
212	>	//                         "Looks like we're stuck running test: %s (%d/%d)%n",
213	>	//                         lastTestCase, currentRun, runsPerTest);
214	>	//                     System.err.println("availableProcessors=" +
215	>	//                         Runtime.getRuntime().availableProcessors());
216	>	//                     System.err.printf("cpu model = %s%n", cpuModel());
217	>	dumpTestThreads();
218	>	// one stack dump is probably enough; more would be spam
219	>	break;
220	>	}
221	>	lastTestCase = currentTestCase;
222	>	}}};
223	>	Thread thread = new Thread(checkForWedgedTest, "checkForWedgedTest");
224	>	thread.setDaemon(true);
225	>	thread.start();
226	>	}
227	>
228	>	//     public static String cpuModel() {
229	>	//         try {
230	>	//             Matcher matcher = Pattern.compile("model name\\s*: (.*)")
231	>	//                 .matcher(new String(
232	>	//                      Files.readAllBytes(Paths.get("/proc/cpuinfo")), "UTF-8"));
233	>	//             matcher.find();
234	>	//             return matcher.group(1);
235	>	//         } catch (Exception ex) { return null; }
236	>	//     }
237	>
238	>	public void runBare() throws Throwable {
239	>	currentTestCase = this;
240	>	if (methodFilter == null
241	>	|| methodFilter.matcher(toString()).find())
242	>	super.runBare();
243	>	}
244	>
245	>	protected void runTest() throws Throwable {
246	>	for (int i = 0; i < runsPerTest; i++) {
247	>	// currentRun = i;
248	>	if (profileTests)
249	>	runTestProfiled();
250	>	else
251	>	super.runTest();
252	>	}
253	>	}
254	>
255	>	protected void runTestProfiled() throws Throwable {
256	>	for (int i = 0; i < 2; i++) {
257	>	long startTime = System.nanoTime();
258	>	super.runTest();
259	>	long elapsedMillis = millisElapsedSince(startTime);
260	>	if (elapsedMillis < profileThreshold)
261	>	break;
262	>	// Never report first run of any test; treat it as a
263	>	// warmup run, notably to trigger all needed classloading,
264	>	if (i > 0)
265	>	System.out.printf("%n%s: %d%n", toString(), elapsedMillis);
266	>	}
267	>	}
268	>
269	>	/**
270	>	* Runs all JSR166 unit tests using junit.textui.TestRunner.
271	>	*/
272	>	public static void main(String[] args) {
273	>	main(suite(), args);
274	>	}
275	>
276	>	static class PithyResultPrinter extends junit.textui.ResultPrinter {
277	>	PithyResultPrinter(java.io.PrintStream writer) { super(writer); }
278	>	long runTime;
279	>	public void startTest(Test test) {}
280	>	protected void printHeader(long runTime) {
281	>	this.runTime = runTime; // defer printing for later
282	>	}
283	>	protected void printFooter(TestResult result) {
284	>	if (result.wasSuccessful()) {
285	>	getWriter().println("OK (" + result.runCount() + " tests)"
286	>	+ "  Time: " + elapsedTimeAsString(runTime));
287	>	} else {
288	>	getWriter().println("Time: " + elapsedTimeAsString(runTime));
289	>	super.printFooter(result);
290	>	}
291	>	}
292	>	}
293	>
294	>	/**
295	>	* Returns a TestRunner that doesn't bother with unnecessary
296	>	* fluff, like printing a "." for each test case.
297	>	*/
298	>	static junit.textui.TestRunner newPithyTestRunner() {
299	>	junit.textui.TestRunner runner = new junit.textui.TestRunner();
300	>	runner.setPrinter(new PithyResultPrinter(System.out));
301	>	return runner;
302	>	}
303	>
304	>	/**
305	>	* Runs all unit tests in the given test suite.
306	>	* Actual behavior influenced by jsr166.* system properties.
307	>	*/
308	>	static void main(Test suite, String[] args) {
309	>	if (useSecurityManager) {
310	>	System.err.println("Setting a permissive security manager");
311	>	Policy.setPolicy(permissivePolicy());
312	>	System.setSecurityManager(new SecurityManager());
313	>	}
314	>	for (int i = 0; i < suiteRuns; i++) {
315	>	TestResult result = newPithyTestRunner().doRun(suite);
316	>	if (!result.wasSuccessful())
317	>	System.exit(1);
318	>	System.gc();
319	>	System.runFinalization();
320	>	}
321	>	}
322	>
323	>	public static TestSuite newTestSuite(Object... suiteOrClasses) {
324	>	TestSuite suite = new TestSuite();
325	>	for (Object suiteOrClass : suiteOrClasses) {
326	>	if (suiteOrClass instanceof TestSuite)
327	>	suite.addTest((TestSuite) suiteOrClass);
328	>	else if (suiteOrClass instanceof Class)
329	>	suite.addTest(new TestSuite((Class<?>) suiteOrClass));
330	>	else
331	>	throw new ClassCastException("not a test suite or class");
332	>	}
333	>	return suite;
334	>	}
335	>
336	>	public static void addNamedTestClasses(TestSuite suite,
337	>	String... testClassNames) {
338	>	for (String testClassName : testClassNames) {
339	>	try {
340	>	Class<?> testClass = Class.forName(testClassName);
341	>	Method m = testClass.getDeclaredMethod("suite",
342	>	new Class<?>[0]);
343	>	suite.addTest(newTestSuite((Test)m.invoke(null)));
344	>	} catch (Exception e) {
345	>	throw new Error("Missing test class", e);
346	>	}
347	>	}
348	>	}
349	>
350	>	public static final double JAVA_CLASS_VERSION;
351	>	public static final String JAVA_SPECIFICATION_VERSION;
352	>	static {
353	>	try {
354	>	JAVA_CLASS_VERSION = java.security.AccessController.doPrivileged(
355	>	new java.security.PrivilegedAction<Double>() {
356	>	public Double run() {
357	>	return Double.valueOf(System.getProperty("java.class.version"));}});
358	>	JAVA_SPECIFICATION_VERSION = java.security.AccessController.doPrivileged(
359	>	new java.security.PrivilegedAction<String>() {
360	>	public String run() {
361	>	return System.getProperty("java.specification.version");}});
362	>	} catch (Throwable t) {
363	>	throw new Error(t);
364	>	}
365	>	}
366	>
367	>	public static boolean atLeastJava6() { return JAVA_CLASS_VERSION >= 50.0; }
368	>	public static boolean atLeastJava7() { return JAVA_CLASS_VERSION >= 51.0; }
369	>	public static boolean atLeastJava8() { return JAVA_CLASS_VERSION >= 52.0; }
370	>	public static boolean atLeastJava9() {
371	>	return JAVA_CLASS_VERSION >= 53.0
372	>	// As of 2015-09, java9 still uses 52.0 class file version
373	>	|| JAVA_SPECIFICATION_VERSION.matches("^(1\\.)?(9|[0-9][0-9])$");
374	>	}
375	>	public static boolean atLeastJava10() {
376	>	return JAVA_CLASS_VERSION >= 54.0
377	>	|| JAVA_SPECIFICATION_VERSION.matches("^(1\\.)?[0-9][0-9]$");
378	>	}
379	>
380	>	/**
381	>	* Collects all JSR166 unit tests as one suite.
382	>	*/
383	>	public static Test suite() {
384	>	// Java7+ test classes
385	>	TestSuite suite = newTestSuite(
386	>	ForkJoinPoolTest.suite(),
387	>	ForkJoinTaskTest.suite(),
388	>	RecursiveActionTest.suite(),
389	>	RecursiveTaskTest.suite(),
390	>	LinkedTransferQueueTest.suite(),
391	>	PhaserTest.suite(),
392	>	ThreadLocalRandomTest.suite(),
393	>	AbstractExecutorServiceTest.suite(),
394	>	AbstractQueueTest.suite(),
395	>	AbstractQueuedSynchronizerTest.suite(),
396	>	AbstractQueuedLongSynchronizerTest.suite(),
397	>	ArrayBlockingQueueTest.suite(),
398	>	ArrayDequeTest.suite(),
399	>	AtomicBooleanTest.suite(),
400	>	AtomicIntegerArrayTest.suite(),
401	>	AtomicIntegerFieldUpdaterTest.suite(),
402	>	AtomicIntegerTest.suite(),
403	>	AtomicLongArrayTest.suite(),
404	>	AtomicLongFieldUpdaterTest.suite(),
405	>	AtomicLongTest.suite(),
406	>	AtomicMarkableReferenceTest.suite(),
407	>	AtomicReferenceArrayTest.suite(),
408	>	AtomicReferenceFieldUpdaterTest.suite(),
409	>	AtomicReferenceTest.suite(),
410	>	AtomicStampedReferenceTest.suite(),
411	>	ConcurrentHashMapTest.suite(),
412	>	ConcurrentLinkedDequeTest.suite(),
413	>	ConcurrentLinkedQueueTest.suite(),
414	>	ConcurrentSkipListMapTest.suite(),
415	>	ConcurrentSkipListSubMapTest.suite(),
416	>	ConcurrentSkipListSetTest.suite(),
417	>	ConcurrentSkipListSubSetTest.suite(),
418	>	CopyOnWriteArrayListTest.suite(),
419	>	CopyOnWriteArraySetTest.suite(),
420	>	CountDownLatchTest.suite(),
421	>	CyclicBarrierTest.suite(),
422	>	DelayQueueTest.suite(),
423	>	EntryTest.suite(),
424	>	ExchangerTest.suite(),
425	>	ExecutorsTest.suite(),
426	>	ExecutorCompletionServiceTest.suite(),
427	>	FutureTaskTest.suite(),
428	>	LinkedBlockingDequeTest.suite(),
429	>	LinkedBlockingQueueTest.suite(),
430	>	LinkedListTest.suite(),
431	>	LockSupportTest.suite(),
432	>	PriorityBlockingQueueTest.suite(),
433	>	PriorityQueueTest.suite(),
434	>	ReentrantLockTest.suite(),
435	>	ReentrantReadWriteLockTest.suite(),
436	>	ScheduledExecutorTest.suite(),
437	>	ScheduledExecutorSubclassTest.suite(),
438	>	SemaphoreTest.suite(),
439	>	SynchronousQueueTest.suite(),
440	>	SystemTest.suite(),
441	>	ThreadLocalTest.suite(),
442	>	ThreadPoolExecutorTest.suite(),
443	>	ThreadPoolExecutorSubclassTest.suite(),
444	>	ThreadTest.suite(),
445	>	TimeUnitTest.suite(),
446	>	TreeMapTest.suite(),
447	>	TreeSetTest.suite(),
448	>	TreeSubMapTest.suite(),
449	>	TreeSubSetTest.suite());
450	>
451	>	// Java8+ test classes
452	>	if (atLeastJava8()) {
453	>	String[] java8TestClassNames = {
454	>	"Atomic8Test",
455	>	"CompletableFutureTest",
456	>	"ConcurrentHashMap8Test",
457	>	"CountedCompleterTest",
458	>	"DoubleAccumulatorTest",
459	>	"DoubleAdderTest",
460	>	"ForkJoinPool8Test",
461	>	"ForkJoinTask8Test",
462	>	"LongAccumulatorTest",
463	>	"LongAdderTest",
464	>	"SplittableRandomTest",
465	>	"StampedLockTest",
466	>	"SubmissionPublisherTest",
467	>	"ThreadLocalRandom8Test",
468	>	};
469	>	addNamedTestClasses(suite, java8TestClassNames);
470	>	}
471	>
472	>	// Java9+ test classes
473	>	if (atLeastJava9()) {
474	>	String[] java9TestClassNames = {
475	>	// Currently empty, but expecting varhandle tests
476	>	};
477	>	addNamedTestClasses(suite, java9TestClassNames);
478	>	}
479	>
480	>	return suite;
481	>	}
482	>
483	>	/** Returns list of junit-style test method names in given class. */
484	>	public static ArrayList<String> testMethodNames(Class<?> testClass) {
485	>	Method[] methods = testClass.getDeclaredMethods();
486	>	ArrayList<String> names = new ArrayList<String>(methods.length);
487	>	for (Method method : methods) {
488	>	if (method.getName().startsWith("test")
489	>	&& Modifier.isPublic(method.getModifiers())
490	>	// method.getParameterCount() requires jdk8+
491	>	&& method.getParameterTypes().length == 0) {
492	>	names.add(method.getName());
493	>	}
494	>	}
495	>	return names;
496	>	}
497	>
498	>	/**
499	>	* Returns junit-style testSuite for the given test class, but
500	>	* parameterized by passing extra data to each test.
501	>	*/
502	>	public static <ExtraData> Test parameterizedTestSuite
503	>	(Class<? extends JSR166TestCase> testClass,
504	>	Class<ExtraData> dataClass,
505	>	ExtraData data) {
506	>	try {
507	>	TestSuite suite = new TestSuite();
508	>	Constructor c =
509	>	testClass.getDeclaredConstructor(dataClass, String.class);
510	>	for (String methodName : testMethodNames(testClass))
511	>	suite.addTest((Test) c.newInstance(data, methodName));
512	>	return suite;
513	>	} catch (Exception e) {
514	>	throw new Error(e);
515	>	}
516	>	}
517	>
518	>	/**
519	>	* Returns junit-style testSuite for the jdk8 extension of the
520	>	* given test class, but parameterized by passing extra data to
521	>	* each test.  Uses reflection to allow compilation in jdk7.
522	>	*/
523	>	public static <ExtraData> Test jdk8ParameterizedTestSuite
524	>	(Class<? extends JSR166TestCase> testClass,
525	>	Class<ExtraData> dataClass,
526	>	ExtraData data) {
527	>	if (atLeastJava8()) {
528	>	String name = testClass.getName();
529	>	String name8 = name.replaceAll("Test$", "8Test");
530	>	if (name.equals(name8)) throw new Error(name);
531	>	try {
532	>	return (Test)
533	>	Class.forName(name8)
534	>	.getMethod("testSuite", new Class[] { dataClass })
535	>	.invoke(null, data);
536	>	} catch (Exception e) {
537	>	throw new Error(e);
538	>	}
539	>	} else {
540	>	return new TestSuite();
541	>	}
542	>	}
543	>
544	>	// Delays for timing-dependent tests, in milliseconds.
545	>
546	>	public static long SHORT_DELAY_MS;
547	>	public static long SMALL_DELAY_MS;
548	>	public static long MEDIUM_DELAY_MS;
549	>	public static long LONG_DELAY_MS;
550	>
551	>	/**
552	>	* Returns the shortest timed delay. This could
553	>	* be reimplemented to use for example a Property.
554	>	*/
555	>	protected long getShortDelay() {
556	>	return 50;
557	>	}
558	>
559	>	/**
560	>	* Sets delays as multiples of SHORT_DELAY.
561	>	*/
562	>	protected void setDelays() {
563	>	SHORT_DELAY_MS = getShortDelay();
564	>	SMALL_DELAY_MS  = SHORT_DELAY_MS * 5;
565	>	MEDIUM_DELAY_MS = SHORT_DELAY_MS * 10;
566	>	LONG_DELAY_MS   = SHORT_DELAY_MS * 200;
567	>	}
568	>
569	>	/**
570	>	* Returns a timeout in milliseconds to be used in tests that
571	>	* verify that operations block or time out.
572	>	*/
573	>	long timeoutMillis() {
574	>	return SHORT_DELAY_MS / 4;
575	>	}
576	>
577	>	/**
578	>	* Returns a new Date instance representing a time at least
579	>	* delayMillis milliseconds in the future.
580	>	*/
581	>	Date delayedDate(long delayMillis) {
582	>	// Add 1 because currentTimeMillis is known to round into the past.
583	>	return new Date(System.currentTimeMillis() + delayMillis + 1);
584	>	}
585	>
586	>	/**
587	>	* The first exception encountered if any threadAssertXXX method fails.
588	>	*/
589	>	private final AtomicReference<Throwable> threadFailure
590	>	= new AtomicReference<Throwable>(null);
591	>
592	>	/**
593	>	* Records an exception so that it can be rethrown later in the test
594	>	* harness thread, triggering a test case failure.  Only the first
595	>	* failure is recorded; subsequent calls to this method from within
596	>	* the same test have no effect.
597	>	*/
598	>	public void threadRecordFailure(Throwable t) {
599	>	System.err.println(t);
600	>	dumpTestThreads();
601	>	threadFailure.compareAndSet(null, t);
602	>	}
603	>
604	>	public void setUp() {
605	>	setDelays();
606	>	}
607	>
608	>	void tearDownFail(String format, Object... args) {
609	>	String msg = toString() + ": " + String.format(format, args);
610	>	System.err.println(msg);
611	>	dumpTestThreads();
612	>	throw new AssertionFailedError(msg);
613	>	}
614
615		/**
616	<	* Initialize test to indicat that no thread assertions have failed
616	>	* Extra checks that get done for all test cases.
617	>	*
618	>	* Triggers test case failure if any thread assertions have failed,
619	>	* by rethrowing, in the test harness thread, any exception recorded
620	>	* earlier by threadRecordFailure.
621	>	*
622	>	* Triggers test case failure if interrupt status is set in the main thread.
623		*/
624	<	public void setUp() {
625	<	threadFailed = false;
624	>	public void tearDown() throws Exception {
625	>	Throwable t = threadFailure.getAndSet(null);
626	>	if (t != null) {
627	>	if (t instanceof Error)
628	>	throw (Error) t;
629	>	else if (t instanceof RuntimeException)
630	>	throw (RuntimeException) t;
631	>	else if (t instanceof Exception)
632	>	throw (Exception) t;
633	>	else {
634	>	AssertionFailedError afe =
635	>	new AssertionFailedError(t.toString());
636	>	afe.initCause(t);
637	>	throw afe;
638	>	}
639	>	}
640	>
641	>	if (Thread.interrupted())
642	>	tearDownFail("interrupt status set in main thread");
643	>
644	>	checkForkJoinPoolThreadLeaks();
645		}
646
647		/**
648	<	* Trigger test case failure if any thread assertions have failed
648	>	* Finds missing PoolCleaners
649		*/
650	<	public void tearDown() {
651	<	assertFalse(threadFailed);
650	>	void checkForkJoinPoolThreadLeaks() throws InterruptedException {
651	>	Thread[] survivors = new Thread[7];
652	>	int count = Thread.enumerate(survivors);
653	>	for (int i = 0; i < count; i++) {
654	>	Thread thread = survivors[i];
655	>	String name = thread.getName();
656	>	if (name.startsWith("ForkJoinPool-")) {
657	>	// give thread some time to terminate
658	>	thread.join(LONG_DELAY_MS);
659	>	if (thread.isAlive())
660	>	tearDownFail("Found leaked ForkJoinPool thread thread=%s",
661	>	thread);
662	>	}
663	>	}
664	>
665	>	if (!ForkJoinPool.commonPool()
666	>	.awaitQuiescence(LONG_DELAY_MS, MILLISECONDS))
667	>	tearDownFail("ForkJoin common pool thread stuck");
668		}
669
670	+	/**
671	+	* Just like fail(reason), but additionally recording (using
672	+	* threadRecordFailure) any AssertionFailedError thrown, so that
673	+	* the current testcase will fail.
674	+	*/
675		public void threadFail(String reason) {
676	<	threadFailed = true;
677	<	fail(reason);
676	>	try {
677	>	fail(reason);
678	>	} catch (AssertionFailedError t) {
679	>	threadRecordFailure(t);
680	>	throw t;
681	>	}
682		}
683
684	+	/**
685	+	* Just like assertTrue(b), but additionally recording (using
686	+	* threadRecordFailure) any AssertionFailedError thrown, so that
687	+	* the current testcase will fail.
688	+	*/
689		public void threadAssertTrue(boolean b) {
690	<	if (!b) {
83	<	threadFailed = true;
690	>	try {
691		assertTrue(b);
692	+	} catch (AssertionFailedError t) {
693	+	threadRecordFailure(t);
694	+	throw t;
695		}
696		}
697	+
698	+	/**
699	+	* Just like assertFalse(b), but additionally recording (using
700	+	* threadRecordFailure) any AssertionFailedError thrown, so that
701	+	* the current testcase will fail.
702	+	*/
703		public void threadAssertFalse(boolean b) {
704	<	if (b) {
89	<	threadFailed = true;
704	>	try {
705		assertFalse(b);
706	+	} catch (AssertionFailedError t) {
707	+	threadRecordFailure(t);
708	+	throw t;
709		}
710		}
711	+
712	+	/**
713	+	* Just like assertNull(x), but additionally recording (using
714	+	* threadRecordFailure) any AssertionFailedError thrown, so that
715	+	* the current testcase will fail.
716	+	*/
717		public void threadAssertNull(Object x) {
718	<	if (x != null) {
95	<	threadFailed = true;
718	>	try {
719		assertNull(x);
720	+	} catch (AssertionFailedError t) {
721	+	threadRecordFailure(t);
722	+	throw t;
723		}
724		}
725	+
726	+	/**
727	+	* Just like assertEquals(x, y), but additionally recording (using
728	+	* threadRecordFailure) any AssertionFailedError thrown, so that
729	+	* the current testcase will fail.
730	+	*/
731		public void threadAssertEquals(long x, long y) {
732	<	if (x != y) {
101	<	threadFailed = true;
732	>	try {
733		assertEquals(x, y);
734	+	} catch (AssertionFailedError t) {
735	+	threadRecordFailure(t);
736	+	throw t;
737		}
738		}
739	+
740	+	/**
741	+	* Just like assertEquals(x, y), but additionally recording (using
742	+	* threadRecordFailure) any AssertionFailedError thrown, so that
743	+	* the current testcase will fail.
744	+	*/
745		public void threadAssertEquals(Object x, Object y) {
746	<	if (x != y && (x == null || !x.equals(y))) {
107	<	threadFailed = true;
746	>	try {
747		assertEquals(x, y);
748	+	} catch (AssertionFailedError fail) {
749	+	threadRecordFailure(fail);
750	+	throw fail;
751	+	} catch (Throwable fail) {
752	+	threadUnexpectedException(fail);
753		}
754		}
755
756		/**
757	<	* Wait out termination of a thread pool or fail doing so
757	>	* Just like assertSame(x, y), but additionally recording (using
758	>	* threadRecordFailure) any AssertionFailedError thrown, so that
759	>	* the current testcase will fail.
760		*/
761	<	public void joinPool(ExecutorService exec) {
761	>	public void threadAssertSame(Object x, Object y) {
762		try {
763	<	exec.shutdown();
764	<	assertTrue(exec.awaitTermination(LONG_DELAY_MS, TimeUnit.MILLISECONDS));
765	<	} catch(InterruptedException ie) {
766	<	fail("unexpected exception");
763	>	assertSame(x, y);
764	>	} catch (AssertionFailedError fail) {
765	>	threadRecordFailure(fail);
766	>	throw fail;
767	>	}
768	>	}
769	>
770	>	/**
771	>	* Calls threadFail with message "should throw exception".
772	>	*/
773	>	public void threadShouldThrow() {
774	>	threadFail("should throw exception");
775	>	}
776	>
777	>	/**
778	>	* Calls threadFail with message "should throw" + exceptionName.
779	>	*/
780	>	public void threadShouldThrow(String exceptionName) {
781	>	threadFail("should throw " + exceptionName);
782	>	}
783	>
784	>	/**
785	>	* Records the given exception using {@link #threadRecordFailure},
786	>	* then rethrows the exception, wrapping it in an
787	>	* AssertionFailedError if necessary.
788	>	*/
789	>	public void threadUnexpectedException(Throwable t) {
790	>	threadRecordFailure(t);
791	>	t.printStackTrace();
792	>	if (t instanceof RuntimeException)
793	>	throw (RuntimeException) t;
794	>	else if (t instanceof Error)
795	>	throw (Error) t;
796	>	else {
797	>	AssertionFailedError afe =
798	>	new AssertionFailedError("unexpected exception: " + t);
799	>	afe.initCause(t);
800	>	throw afe;
801		}
802		}
803
804	<	public static final long SHORT_DELAY_MS =   100;
805	<	public static final long SMALL_DELAY_MS =   500;
806	<	public static final long MEDIUM_DELAY_MS = 1000;
807	<	public static final long LONG_DELAY_MS =   5000;
804	>	/**
805	>	* Delays, via Thread.sleep, for the given millisecond delay, but
806	>	* if the sleep is shorter than specified, may re-sleep or yield
807	>	* until time elapses.  Ensures that the given time, as measured
808	>	* by System.nanoTime(), has elapsed.
809	>	*/
810	>	static void delay(long millis) throws InterruptedException {
811	>	long nanos = millis * (1000 * 1000);
812	>	final long wakeupTime = System.nanoTime() + nanos;
813	>	do {
814	>	if (millis > 0L)
815	>	Thread.sleep(millis);
816	>	else // too short to sleep
817	>	Thread.yield();
818	>	nanos = wakeupTime - System.nanoTime();
819	>	millis = nanos / (1000 * 1000);
820	>	} while (nanos >= 0L);
821	>	}
822
823	+	/**
824	+	* Allows use of try-with-resources with per-test thread pools.
825	+	*/
826	+	class PoolCleaner implements AutoCloseable {
827	+	private final ExecutorService pool;
828	+	public PoolCleaner(ExecutorService pool) { this.pool = pool; }
829	+	public void close() { joinPool(pool); }
830	+	}
831	+
832	+	/**
833	+	* An extension of PoolCleaner that has an action to release the pool.
834	+	*/
835	+	class PoolCleanerWithReleaser extends PoolCleaner {
836	+	private final Runnable releaser;
837	+	public PoolCleanerWithReleaser(ExecutorService pool, Runnable releaser) {
838	+	super(pool);
839	+	this.releaser = releaser;
840	+	}
841	+	public void close() {
842	+	try {
843	+	releaser.run();
844	+	} finally {
845	+	super.close();
846	+	}
847	+	}
848	+	}
849	+
850	+	PoolCleaner cleaner(ExecutorService pool) {
851	+	return new PoolCleaner(pool);
852	+	}
853	+
854	+	PoolCleaner cleaner(ExecutorService pool, Runnable releaser) {
855	+	return new PoolCleanerWithReleaser(pool, releaser);
856	+	}
857	+
858	+	PoolCleaner cleaner(ExecutorService pool, CountDownLatch latch) {
859	+	return new PoolCleanerWithReleaser(pool, releaser(latch));
860	+	}
861	+
862	+	Runnable releaser(final CountDownLatch latch) {
863	+	return new Runnable() { public void run() {
864	+	do { latch.countDown(); }
865	+	while (latch.getCount() > 0);
866	+	}};
867	+	}
868	+
869	+	/**
870	+	* Waits out termination of a thread pool or fails doing so.
871	+	*/
872	+	void joinPool(ExecutorService pool) {
873	+	try {
874	+	pool.shutdown();
875	+	if (!pool.awaitTermination(2 * LONG_DELAY_MS, MILLISECONDS)) {
876	+	try {
877	+	threadFail("ExecutorService " + pool +
878	+	" did not terminate in a timely manner");
879	+	} finally {
880	+	// last resort, for the benefit of subsequent tests
881	+	pool.shutdownNow();
882	+	pool.awaitTermination(MEDIUM_DELAY_MS, MILLISECONDS);
883	+	}
884	+	}
885	+	} catch (SecurityException ok) {
886	+	// Allowed in case test doesn't have privs
887	+	} catch (InterruptedException fail) {
888	+	threadFail("Unexpected InterruptedException");
889	+	}
890	+	}
891	+
892	+	/** Like Runnable, but with the freedom to throw anything */
893	+	interface Action { public void run() throws Throwable; }
894	+
895	+	/**
896	+	* Runs all the given actions in parallel, failing if any fail.
897	+	* Useful for running multiple variants of tests that are
898	+	* necessarily individually slow because they must block.
899	+	*/
900	+	void testInParallel(Action ... actions) {
901	+	ExecutorService pool = Executors.newCachedThreadPool();
902	+	try (PoolCleaner cleaner = cleaner(pool)) {
903	+	ArrayList<Future<?>> futures = new ArrayList<>(actions.length);
904	+	for (final Action action : actions)
905	+	futures.add(pool.submit(new CheckedRunnable() {
906	+	public void realRun() throws Throwable { action.run();}}));
907	+	for (Future<?> future : futures)
908	+	try {
909	+	assertNull(future.get(LONG_DELAY_MS, MILLISECONDS));
910	+	} catch (ExecutionException ex) {
911	+	threadUnexpectedException(ex.getCause());
912	+	} catch (Exception ex) {
913	+	threadUnexpectedException(ex);
914	+	}
915	+	}
916	+	}
917	+
918	+	/**
919	+	* A debugging tool to print stack traces of most threads, as jstack does.
920	+	* Uninteresting threads are filtered out.
921	+	*/
922	+	static void dumpTestThreads() {
923	+	ThreadMXBean threadMXBean = ManagementFactory.getThreadMXBean();
924	+	System.err.println("------ stacktrace dump start ------");
925	+	for (ThreadInfo info : threadMXBean.dumpAllThreads(true, true)) {
926	+	String name = info.getThreadName();
927	+	if ("Signal Dispatcher".equals(name))
928	+	continue;
929	+	if ("Reference Handler".equals(name)
930	+	&& info.getLockName().startsWith("java.lang.ref.Reference$Lock"))
931	+	continue;
932	+	if ("Finalizer".equals(name)
933	+	&& info.getLockName().startsWith("java.lang.ref.ReferenceQueue$Lock"))
934	+	continue;
935	+	if ("checkForWedgedTest".equals(name))
936	+	continue;
937	+	System.err.print(info);
938	+	}
939	+	System.err.println("------ stacktrace dump end ------");
940	+	}
941	+
942	+	/**
943	+	* Checks that thread does not terminate within the default
944	+	* millisecond delay of {@code timeoutMillis()}.
945	+	*/
946	+	void assertThreadStaysAlive(Thread thread) {
947	+	assertThreadStaysAlive(thread, timeoutMillis());
948	+	}
949	+
950	+	/**
951	+	* Checks that thread does not terminate within the given millisecond delay.
952	+	*/
953	+	void assertThreadStaysAlive(Thread thread, long millis) {
954	+	try {
955	+	// No need to optimize the failing case via Thread.join.
956	+	delay(millis);
957	+	assertTrue(thread.isAlive());
958	+	} catch (InterruptedException fail) {
959	+	threadFail("Unexpected InterruptedException");
960	+	}
961	+	}
962	+
963	+	/**
964	+	* Checks that the threads do not terminate within the default
965	+	* millisecond delay of {@code timeoutMillis()}.
966	+	*/
967	+	void assertThreadsStayAlive(Thread... threads) {
968	+	assertThreadsStayAlive(timeoutMillis(), threads);
969	+	}
970	+
971	+	/**
972	+	* Checks that the threads do not terminate within the given millisecond delay.
973	+	*/
974	+	void assertThreadsStayAlive(long millis, Thread... threads) {
975	+	try {
976	+	// No need to optimize the failing case via Thread.join.
977	+	delay(millis);
978	+	for (Thread thread : threads)
979	+	assertTrue(thread.isAlive());
980	+	} catch (InterruptedException fail) {
981	+	threadFail("Unexpected InterruptedException");
982	+	}
983	+	}
984	+
985	+	/**
986	+	* Checks that future.get times out, with the default timeout of
987	+	* {@code timeoutMillis()}.
988	+	*/
989	+	void assertFutureTimesOut(Future future) {
990	+	assertFutureTimesOut(future, timeoutMillis());
991	+	}
992	+
993	+	/**
994	+	* Checks that future.get times out, with the given millisecond timeout.
995	+	*/
996	+	void assertFutureTimesOut(Future future, long timeoutMillis) {
997	+	long startTime = System.nanoTime();
998	+	try {
999	+	future.get(timeoutMillis, MILLISECONDS);
1000	+	shouldThrow();
1001	+	} catch (TimeoutException success) {
1002	+	} catch (Exception fail) {
1003	+	threadUnexpectedException(fail);
1004	+	} finally { future.cancel(true); }
1005	+	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
1006	+	}
1007	+
1008	+	/**
1009	+	* Fails with message "should throw exception".
1010	+	*/
1011	+	public void shouldThrow() {
1012	+	fail("Should throw exception");
1013	+	}
1014	+
1015	+	/**
1016	+	* Fails with message "should throw " + exceptionName.
1017	+	*/
1018	+	public void shouldThrow(String exceptionName) {
1019	+	fail("Should throw " + exceptionName);
1020	+	}
1021
1022		/**
1023		* The number of elements to place in collections, arrays, etc.
#	Line 134 | Line 1026 | public class JSR166TestCase extends Test
1026
1027		// Some convenient Integer constants
1028
1029	<	public static final Integer zero = new Integer(0);
1030	<	public static final Integer one = new Integer(1);
1031	<	public static final Integer two = new Integer(2);
1032	<	public static final Integer three  = new Integer(3);
1029	>	public static final Integer zero  = new Integer(0);
1030	>	public static final Integer one   = new Integer(1);
1031	>	public static final Integer two   = new Integer(2);
1032	>	public static final Integer three = new Integer(3);
1033		public static final Integer four  = new Integer(4);
1034		public static final Integer five  = new Integer(5);
1035	<	public static final Integer six = new Integer(6);
1035	>	public static final Integer six   = new Integer(6);
1036		public static final Integer seven = new Integer(7);
1037		public static final Integer eight = new Integer(8);
1038	<	public static final Integer nine = new Integer(9);
1038	>	public static final Integer nine  = new Integer(9);
1039		public static final Integer m1  = new Integer(-1);
1040		public static final Integer m2  = new Integer(-2);
1041		public static final Integer m3  = new Integer(-3);
1042	<	public static final Integer m4 = new Integer(-4);
1043	<	public static final Integer m5 = new Integer(-5);
1042	>	public static final Integer m4  = new Integer(-4);
1043	>	public static final Integer m5  = new Integer(-5);
1044	>	public static final Integer m6  = new Integer(-6);
1045		public static final Integer m10 = new Integer(-10);
1046
1047	+	/**
1048	+	* Runs Runnable r with a security policy that permits precisely
1049	+	* the specified permissions.  If there is no current security
1050	+	* manager, the runnable is run twice, both with and without a
1051	+	* security manager.  We require that any security manager permit
1052	+	* getPolicy/setPolicy.
1053	+	*/
1054	+	public void runWithPermissions(Runnable r, Permission... permissions) {
1055	+	SecurityManager sm = System.getSecurityManager();
1056	+	if (sm == null) {
1057	+	r.run();
1058	+	}
1059	+	runWithSecurityManagerWithPermissions(r, permissions);
1060	+	}
1061
1062	<	// Some convenient Runnable classes
1062	>	/**
1063	>	* Runs Runnable r with a security policy that permits precisely
1064	>	* the specified permissions.  If there is no current security
1065	>	* manager, a temporary one is set for the duration of the
1066	>	* Runnable.  We require that any security manager permit
1067	>	* getPolicy/setPolicy.
1068	>	*/
1069	>	public void runWithSecurityManagerWithPermissions(Runnable r,
1070	>	Permission... permissions) {
1071	>	SecurityManager sm = System.getSecurityManager();
1072	>	if (sm == null) {
1073	>	Policy savedPolicy = Policy.getPolicy();
1074	>	try {
1075	>	Policy.setPolicy(permissivePolicy());
1076	>	System.setSecurityManager(new SecurityManager());
1077	>	runWithSecurityManagerWithPermissions(r, permissions);
1078	>	} finally {
1079	>	System.setSecurityManager(null);
1080	>	Policy.setPolicy(savedPolicy);
1081	>	}
1082	>	} else {
1083	>	Policy savedPolicy = Policy.getPolicy();
1084	>	AdjustablePolicy policy = new AdjustablePolicy(permissions);
1085	>	Policy.setPolicy(policy);
1086
1087	<	public static class NoOpRunnable implements Runnable {
1088	<	public void run() {}
1087	>	try {
1088	>	r.run();
1089	>	} finally {
1090	>	policy.addPermission(new SecurityPermission("setPolicy"));
1091	>	Policy.setPolicy(savedPolicy);
1092	>	}
1093	>	}
1094		}
1095
1096	<	public static class NoOpCallable implements Callable {
1097	<	public Object call() { return Boolean.TRUE; }
1096	>	/**
1097	>	* Runs a runnable without any permissions.
1098	>	*/
1099	>	public void runWithoutPermissions(Runnable r) {
1100	>	runWithPermissions(r);
1101		}
1102
1103	<	public class ShortRunnable implements Runnable {
1104	<	public void run() {
1105	<	try {
1106	<	Thread.sleep(SHORT_DELAY_MS);
1103	>	/**
1104	>	* A security policy where new permissions can be dynamically added
1105	>	* or all cleared.
1106	>	*/
1107	>	public static class AdjustablePolicy extends java.security.Policy {
1108	>	Permissions perms = new Permissions();
1109	>	AdjustablePolicy(Permission... permissions) {
1110	>	for (Permission permission : permissions)
1111	>	perms.add(permission);
1112	>	}
1113	>	void addPermission(Permission perm) { perms.add(perm); }
1114	>	void clearPermissions() { perms = new Permissions(); }
1115	>	public PermissionCollection getPermissions(CodeSource cs) {
1116	>	return perms;
1117	>	}
1118	>	public PermissionCollection getPermissions(ProtectionDomain pd) {
1119	>	return perms;
1120	>	}
1121	>	public boolean implies(ProtectionDomain pd, Permission p) {
1122	>	return perms.implies(p);
1123	>	}
1124	>	public void refresh() {}
1125	>	public String toString() {
1126	>	List<Permission> ps = new ArrayList<Permission>();
1127	>	for (Enumeration<Permission> e = perms.elements(); e.hasMoreElements();)
1128	>	ps.add(e.nextElement());
1129	>	return "AdjustablePolicy with permissions " + ps;
1130	>	}
1131	>	}
1132	>
1133	>	/**
1134	>	* Returns a policy containing all the permissions we ever need.
1135	>	*/
1136	>	public static Policy permissivePolicy() {
1137	>	return new AdjustablePolicy
1138	>	// Permissions j.u.c. needs directly
1139	>	(new RuntimePermission("modifyThread"),
1140	>	new RuntimePermission("getClassLoader"),
1141	>	new RuntimePermission("setContextClassLoader"),
1142	>	// Permissions needed to change permissions!
1143	>	new SecurityPermission("getPolicy"),
1144	>	new SecurityPermission("setPolicy"),
1145	>	new RuntimePermission("setSecurityManager"),
1146	>	// Permissions needed by the junit test harness
1147	>	new RuntimePermission("accessDeclaredMembers"),
1148	>	new PropertyPermission("*", "read"),
1149	>	new java.io.FilePermission("<<ALL FILES>>", "read"));
1150	>	}
1151	>
1152	>	/**
1153	>	* Sleeps until the given time has elapsed.
1154	>	* Throws AssertionFailedError if interrupted.
1155	>	*/
1156	>	void sleep(long millis) {
1157	>	try {
1158	>	delay(millis);
1159	>	} catch (InterruptedException fail) {
1160	>	AssertionFailedError afe =
1161	>	new AssertionFailedError("Unexpected InterruptedException");
1162	>	afe.initCause(fail);
1163	>	throw afe;
1164	>	}
1165	>	}
1166	>
1167	>	/**
1168	>	* Spin-waits up to the specified number of milliseconds for the given
1169	>	* thread to enter a wait state: BLOCKED, WAITING, or TIMED_WAITING.
1170	>	*/
1171	>	void waitForThreadToEnterWaitState(Thread thread, long timeoutMillis) {
1172	>	long startTime = System.nanoTime();
1173	>	for (;;) {
1174	>	Thread.State s = thread.getState();
1175	>	if (s == Thread.State.BLOCKED ||
1176	>	s == Thread.State.WAITING ||
1177	>	s == Thread.State.TIMED_WAITING)
1178	>	return;
1179	>	else if (s == Thread.State.TERMINATED)
1180	>	fail("Unexpected thread termination");
1181	>	else if (millisElapsedSince(startTime) > timeoutMillis) {
1182	>	threadAssertTrue(thread.isAlive());
1183	>	return;
1184		}
1185	<	catch(Exception e) {
1186	<	threadFail("unexpectedException");
1185	>	Thread.yield();
1186	>	}
1187	>	}
1188	>
1189	>	/**
1190	>	* Waits up to LONG_DELAY_MS for the given thread to enter a wait
1191	>	* state: BLOCKED, WAITING, or TIMED_WAITING.
1192	>	*/
1193	>	void waitForThreadToEnterWaitState(Thread thread) {
1194	>	waitForThreadToEnterWaitState(thread, LONG_DELAY_MS);
1195	>	}
1196	>
1197	>	/**
1198	>	* Returns the number of milliseconds since time given by
1199	>	* startNanoTime, which must have been previously returned from a
1200	>	* call to {@link System#nanoTime()}.
1201	>	*/
1202	>	static long millisElapsedSince(long startNanoTime) {
1203	>	return NANOSECONDS.toMillis(System.nanoTime() - startNanoTime);
1204	>	}
1205	>
1206	>	//     void assertTerminatesPromptly(long timeoutMillis, Runnable r) {
1207	>	//         long startTime = System.nanoTime();
1208	>	//         try {
1209	>	//             r.run();
1210	>	//         } catch (Throwable fail) { threadUnexpectedException(fail); }
1211	>	//         if (millisElapsedSince(startTime) > timeoutMillis/2)
1212	>	//             throw new AssertionFailedError("did not return promptly");
1213	>	//     }
1214	>
1215	>	//     void assertTerminatesPromptly(Runnable r) {
1216	>	//         assertTerminatesPromptly(LONG_DELAY_MS/2, r);
1217	>	//     }
1218	>
1219	>	/**
1220	>	* Checks that timed f.get() returns the expected value, and does not
1221	>	* wait for the timeout to elapse before returning.
1222	>	*/
1223	>	<T> void checkTimedGet(Future<T> f, T expectedValue, long timeoutMillis) {
1224	>	long startTime = System.nanoTime();
1225	>	try {
1226	>	assertEquals(expectedValue, f.get(timeoutMillis, MILLISECONDS));
1227	>	} catch (Throwable fail) { threadUnexpectedException(fail); }
1228	>	if (millisElapsedSince(startTime) > timeoutMillis/2)
1229	>	throw new AssertionFailedError("timed get did not return promptly");
1230	>	}
1231	>
1232	>	<T> void checkTimedGet(Future<T> f, T expectedValue) {
1233	>	checkTimedGet(f, expectedValue, LONG_DELAY_MS);
1234	>	}
1235	>
1236	>	/**
1237	>	* Returns a new started daemon Thread running the given runnable.
1238	>	*/
1239	>	Thread newStartedThread(Runnable runnable) {
1240	>	Thread t = new Thread(runnable);
1241	>	t.setDaemon(true);
1242	>	t.start();
1243	>	return t;
1244	>	}
1245	>
1246	>	/**
1247	>	* Waits for the specified time (in milliseconds) for the thread
1248	>	* to terminate (using {@link Thread#join(long)}), else interrupts
1249	>	* the thread (in the hope that it may terminate later) and fails.
1250	>	*/
1251	>	void awaitTermination(Thread t, long timeoutMillis) {
1252	>	try {
1253	>	t.join(timeoutMillis);
1254	>	} catch (InterruptedException fail) {
1255	>	threadUnexpectedException(fail);
1256	>	} finally {
1257	>	if (t.getState() != Thread.State.TERMINATED) {
1258	>	t.interrupt();
1259	>	threadFail("timed out waiting for thread to terminate");
1260		}
1261		}
1262		}
1263
1264	<	public class ShortInterruptedRunnable implements Runnable {
1265	<	public void run() {
1264	>	/**
1265	>	* Waits for LONG_DELAY_MS milliseconds for the thread to
1266	>	* terminate (using {@link Thread#join(long)}), else interrupts
1267	>	* the thread (in the hope that it may terminate later) and fails.
1268	>	*/
1269	>	void awaitTermination(Thread t) {
1270	>	awaitTermination(t, LONG_DELAY_MS);
1271	>	}
1272	>
1273	>	// Some convenient Runnable classes
1274	>
1275	>	public abstract class CheckedRunnable implements Runnable {
1276	>	protected abstract void realRun() throws Throwable;
1277	>
1278	>	public final void run() {
1279		try {
1280	<	Thread.sleep(SHORT_DELAY_MS);
1281	<	threadFail("should throw IE");
1280	>	realRun();
1281	>	} catch (Throwable fail) {
1282	>	threadUnexpectedException(fail);
1283		}
1284	<	catch(InterruptedException success) {
1284	>	}
1285	>	}
1286	>
1287	>	public abstract class RunnableShouldThrow implements Runnable {
1288	>	protected abstract void realRun() throws Throwable;
1289	>
1290	>	final Class<?> exceptionClass;
1291	>
1292	>	<T extends Throwable> RunnableShouldThrow(Class<T> exceptionClass) {
1293	>	this.exceptionClass = exceptionClass;
1294	>	}
1295	>
1296	>	public final void run() {
1297	>	try {
1298	>	realRun();
1299	>	threadShouldThrow(exceptionClass.getSimpleName());
1300	>	} catch (Throwable t) {
1301	>	if (! exceptionClass.isInstance(t))
1302	>	threadUnexpectedException(t);
1303		}
1304		}
1305		}
1306
1307	<	public class SmallRunnable implements Runnable {
1308	<	public void run() {
1307	>	public abstract class ThreadShouldThrow extends Thread {
1308	>	protected abstract void realRun() throws Throwable;
1309	>
1310	>	final Class<?> exceptionClass;
1311	>
1312	>	<T extends Throwable> ThreadShouldThrow(Class<T> exceptionClass) {
1313	>	this.exceptionClass = exceptionClass;
1314	>	}
1315	>
1316	>	public final void run() {
1317		try {
1318	<	Thread.sleep(SMALL_DELAY_MS);
1318	>	realRun();
1319	>	threadShouldThrow(exceptionClass.getSimpleName());
1320	>	} catch (Throwable t) {
1321	>	if (! exceptionClass.isInstance(t))
1322	>	threadUnexpectedException(t);
1323		}
1324	<	catch(Exception e) {
1325	<	threadFail("unexpectedException");
1324	>	}
1325	>	}
1326	>
1327	>	public abstract class CheckedInterruptedRunnable implements Runnable {
1328	>	protected abstract void realRun() throws Throwable;
1329	>
1330	>	public final void run() {
1331	>	try {
1332	>	realRun();
1333	>	threadShouldThrow("InterruptedException");
1334	>	} catch (InterruptedException success) {
1335	>	threadAssertFalse(Thread.interrupted());
1336	>	} catch (Throwable fail) {
1337	>	threadUnexpectedException(fail);
1338		}
1339		}
1340		}
1341
1342	<	public class SmallCallable implements Callable {
1343	<	public Object call() {
1342	>	public abstract class CheckedCallable<T> implements Callable<T> {
1343	>	protected abstract T realCall() throws Throwable;
1344	>
1345	>	public final T call() {
1346		try {
1347	<	Thread.sleep(SMALL_DELAY_MS);
1347	>	return realCall();
1348	>	} catch (Throwable fail) {
1349	>	threadUnexpectedException(fail);
1350	>	return null;
1351		}
1352	<	catch(Exception e) {
1353	<	threadFail("unexpectedException");
1352	>	}
1353	>	}
1354	>
1355	>	public abstract class CheckedInterruptedCallable<T>
1356	>	implements Callable<T> {
1357	>	protected abstract T realCall() throws Throwable;
1358	>
1359	>	public final T call() {
1360	>	try {
1361	>	T result = realCall();
1362	>	threadShouldThrow("InterruptedException");
1363	>	return result;
1364	>	} catch (InterruptedException success) {
1365	>	threadAssertFalse(Thread.interrupted());
1366	>	} catch (Throwable fail) {
1367	>	threadUnexpectedException(fail);
1368		}
1369	+	return null;
1370	+	}
1371	+	}
1372	+
1373	+	public static class NoOpRunnable implements Runnable {
1374	+	public void run() {}
1375	+	}
1376	+
1377	+	public static class NoOpCallable implements Callable {
1378	+	public Object call() { return Boolean.TRUE; }
1379	+	}
1380	+
1381	+	public static final String TEST_STRING = "a test string";
1382	+
1383	+	public static class StringTask implements Callable<String> {
1384	+	final String value;
1385	+	public StringTask() { this(TEST_STRING); }
1386	+	public StringTask(String value) { this.value = value; }
1387	+	public String call() { return value; }
1388	+	}
1389	+
1390	+	public Callable<String> latchAwaitingStringTask(final CountDownLatch latch) {
1391	+	return new CheckedCallable<String>() {
1392	+	protected String realCall() {
1393	+	try {
1394	+	latch.await();
1395	+	} catch (InterruptedException quittingTime) {}
1396	+	return TEST_STRING;
1397	+	}};
1398	+	}
1399	+
1400	+	public Runnable countDowner(final CountDownLatch latch) {
1401	+	return new CheckedRunnable() {
1402	+	public void realRun() throws InterruptedException {
1403	+	latch.countDown();
1404	+	}};
1405	+	}
1406	+
1407	+	class LatchAwaiter extends CheckedRunnable {
1408	+	static final int NEW = 0;
1409	+	static final int RUNNING = 1;
1410	+	static final int DONE = 2;
1411	+	final CountDownLatch latch;
1412	+	int state = NEW;
1413	+	LatchAwaiter(CountDownLatch latch) { this.latch = latch; }
1414	+	public void realRun() throws InterruptedException {
1415	+	state = 1;
1416	+	await(latch);
1417	+	state = 2;
1418	+	}
1419	+	}
1420	+
1421	+	public LatchAwaiter awaiter(CountDownLatch latch) {
1422	+	return new LatchAwaiter(latch);
1423	+	}
1424	+
1425	+	public void await(CountDownLatch latch) {
1426	+	try {
1427	+	if (!latch.await(LONG_DELAY_MS, MILLISECONDS))
1428	+	fail("timed out waiting for CountDownLatch for "
1429	+	+ (LONG_DELAY_MS/1000) + " sec");
1430	+	} catch (Throwable fail) {
1431	+	threadUnexpectedException(fail);
1432	+	}
1433	+	}
1434	+
1435	+	public void await(Semaphore semaphore) {
1436	+	try {
1437	+	if (!semaphore.tryAcquire(LONG_DELAY_MS, MILLISECONDS))
1438	+	fail("timed out waiting for Semaphore for "
1439	+	+ (LONG_DELAY_MS/1000) + " sec");
1440	+	} catch (Throwable fail) {
1441	+	threadUnexpectedException(fail);
1442	+	}
1443	+	}
1444	+
1445	+	//     /**
1446	+	//      * Spin-waits up to LONG_DELAY_MS until flag becomes true.
1447	+	//      */
1448	+	//     public void await(AtomicBoolean flag) {
1449	+	//         await(flag, LONG_DELAY_MS);
1450	+	//     }
1451	+
1452	+	//     /**
1453	+	//      * Spin-waits up to the specified timeout until flag becomes true.
1454	+	//      */
1455	+	//     public void await(AtomicBoolean flag, long timeoutMillis) {
1456	+	//         long startTime = System.nanoTime();
1457	+	//         while (!flag.get()) {
1458	+	//             if (millisElapsedSince(startTime) > timeoutMillis)
1459	+	//                 throw new AssertionFailedError("timed out");
1460	+	//             Thread.yield();
1461	+	//         }
1462	+	//     }
1463	+
1464	+	public static class NPETask implements Callable<String> {
1465	+	public String call() { throw new NullPointerException(); }
1466	+	}
1467	+
1468	+	public static class CallableOne implements Callable<Integer> {
1469	+	public Integer call() { return one; }
1470	+	}
1471	+
1472	+	public class ShortRunnable extends CheckedRunnable {
1473	+	protected void realRun() throws Throwable {
1474	+	delay(SHORT_DELAY_MS);
1475	+	}
1476	+	}
1477	+
1478	+	public class ShortInterruptedRunnable extends CheckedInterruptedRunnable {
1479	+	protected void realRun() throws InterruptedException {
1480	+	delay(SHORT_DELAY_MS);
1481	+	}
1482	+	}
1483	+
1484	+	public class SmallRunnable extends CheckedRunnable {
1485	+	protected void realRun() throws Throwable {
1486	+	delay(SMALL_DELAY_MS);
1487	+	}
1488	+	}
1489	+
1490	+	public class SmallPossiblyInterruptedRunnable extends CheckedRunnable {
1491	+	protected void realRun() {
1492	+	try {
1493	+	delay(SMALL_DELAY_MS);
1494	+	} catch (InterruptedException ok) {}
1495	+	}
1496	+	}
1497	+
1498	+	public class SmallCallable extends CheckedCallable {
1499	+	protected Object realCall() throws InterruptedException {
1500	+	delay(SMALL_DELAY_MS);
1501		return Boolean.TRUE;
1502		}
1503		}
1504
1505	<	public class SmallInterruptedRunnable implements Runnable {
1505	>	public class MediumRunnable extends CheckedRunnable {
1506	>	protected void realRun() throws Throwable {
1507	>	delay(MEDIUM_DELAY_MS);
1508	>	}
1509	>	}
1510	>
1511	>	public class MediumInterruptedRunnable extends CheckedInterruptedRunnable {
1512	>	protected void realRun() throws InterruptedException {
1513	>	delay(MEDIUM_DELAY_MS);
1514	>	}
1515	>	}
1516	>
1517	>	public Runnable possiblyInterruptedRunnable(final long timeoutMillis) {
1518	>	return new CheckedRunnable() {
1519	>	protected void realRun() {
1520	>	try {
1521	>	delay(timeoutMillis);
1522	>	} catch (InterruptedException ok) {}
1523	>	}};
1524	>	}
1525	>
1526	>	public class MediumPossiblyInterruptedRunnable extends CheckedRunnable {
1527	>	protected void realRun() {
1528	>	try {
1529	>	delay(MEDIUM_DELAY_MS);
1530	>	} catch (InterruptedException ok) {}
1531	>	}
1532	>	}
1533	>
1534	>	public class LongPossiblyInterruptedRunnable extends CheckedRunnable {
1535	>	protected void realRun() {
1536	>	try {
1537	>	delay(LONG_DELAY_MS);
1538	>	} catch (InterruptedException ok) {}
1539	>	}
1540	>	}
1541	>
1542	>	/**
1543	>	* For use as ThreadFactory in constructors
1544	>	*/
1545	>	public static class SimpleThreadFactory implements ThreadFactory {
1546	>	public Thread newThread(Runnable r) {
1547	>	return new Thread(r);
1548	>	}
1549	>	}
1550	>
1551	>	public interface TrackedRunnable extends Runnable {
1552	>	boolean isDone();
1553	>	}
1554	>
1555	>	public static TrackedRunnable trackedRunnable(final long timeoutMillis) {
1556	>	return new TrackedRunnable() {
1557	>	private volatile boolean done = false;
1558	>	public boolean isDone() { return done; }
1559	>	public void run() {
1560	>	try {
1561	>	delay(timeoutMillis);
1562	>	done = true;
1563	>	} catch (InterruptedException ok) {}
1564	>	}
1565	>	};
1566	>	}
1567	>
1568	>	public static class TrackedShortRunnable implements Runnable {
1569	>	public volatile boolean done = false;
1570		public void run() {
1571		try {
1572	<	Thread.sleep(SMALL_DELAY_MS);
1573	<	threadFail("should throw IE");
1574	<	}
1575	<	catch(InterruptedException success) {
1576	<	}
1572	>	delay(SHORT_DELAY_MS);
1573	>	done = true;
1574	>	} catch (InterruptedException ok) {}
1575	>	}
1576	>	}
1577	>
1578	>	public static class TrackedSmallRunnable implements Runnable {
1579	>	public volatile boolean done = false;
1580	>	public void run() {
1581	>	try {
1582	>	delay(SMALL_DELAY_MS);
1583	>	done = true;
1584	>	} catch (InterruptedException ok) {}
1585		}
1586		}
1587
1588	+	public static class TrackedMediumRunnable implements Runnable {
1589	+	public volatile boolean done = false;
1590	+	public void run() {
1591	+	try {
1592	+	delay(MEDIUM_DELAY_MS);
1593	+	done = true;
1594	+	} catch (InterruptedException ok) {}
1595	+	}
1596	+	}
1597
1598	<	public class MediumRunnable implements Runnable {
1598	>	public static class TrackedLongRunnable implements Runnable {
1599	>	public volatile boolean done = false;
1600		public void run() {
1601		try {
1602	<	Thread.sleep(MEDIUM_DELAY_MS);
1603	<	}
1604	<	catch(Exception e) {
228	<	threadFail("unexpectedException");
229	<	}
1602	>	delay(LONG_DELAY_MS);
1603	>	done = true;
1604	>	} catch (InterruptedException ok) {}
1605		}
1606		}
1607
1608	<	public class MediumInterruptedRunnable implements Runnable {
1608	>	public static class TrackedNoOpRunnable implements Runnable {
1609	>	public volatile boolean done = false;
1610		public void run() {
1611	+	done = true;
1612	+	}
1613	+	}
1614	+
1615	+	public static class TrackedCallable implements Callable {
1616	+	public volatile boolean done = false;
1617	+	public Object call() {
1618	+	try {
1619	+	delay(SMALL_DELAY_MS);
1620	+	done = true;
1621	+	} catch (InterruptedException ok) {}
1622	+	return Boolean.TRUE;
1623	+	}
1624	+	}
1625	+
1626	+	/**
1627	+	* Analog of CheckedRunnable for RecursiveAction
1628	+	*/
1629	+	public abstract class CheckedRecursiveAction extends RecursiveAction {
1630	+	protected abstract void realCompute() throws Throwable;
1631	+
1632	+	@Override protected final void compute() {
1633		try {
1634	<	Thread.sleep(MEDIUM_DELAY_MS);
1635	<	threadFail("should throw IE");
1634	>	realCompute();
1635	>	} catch (Throwable fail) {
1636	>	threadUnexpectedException(fail);
1637		}
1638	<	catch(InterruptedException success) {
1638	>	}
1639	>	}
1640	>
1641	>	/**
1642	>	* Analog of CheckedCallable for RecursiveTask
1643	>	*/
1644	>	public abstract class CheckedRecursiveTask<T> extends RecursiveTask<T> {
1645	>	protected abstract T realCompute() throws Throwable;
1646	>
1647	>	@Override protected final T compute() {
1648	>	try {
1649	>	return realCompute();
1650	>	} catch (Throwable fail) {
1651	>	threadUnexpectedException(fail);
1652	>	return null;
1653		}
1654		}
1655		}
1656
1657	<	public class MediumPossiblyInterruptedRunnable implements Runnable {
1658	<	public void run() {
1657	>	/**
1658	>	* For use as RejectedExecutionHandler in constructors
1659	>	*/
1660	>	public static class NoOpREHandler implements RejectedExecutionHandler {
1661	>	public void rejectedExecution(Runnable r,
1662	>	ThreadPoolExecutor executor) {}
1663	>	}
1664	>
1665	>	/**
1666	>	* A CyclicBarrier that uses timed await and fails with
1667	>	* AssertionFailedErrors instead of throwing checked exceptions.
1668	>	*/
1669	>	public class CheckedBarrier extends CyclicBarrier {
1670	>	public CheckedBarrier(int parties) { super(parties); }
1671	>
1672	>	public int await() {
1673		try {
1674	<	Thread.sleep(MEDIUM_DELAY_MS);
1674	>	return super.await(2 * LONG_DELAY_MS, MILLISECONDS);
1675	>	} catch (TimeoutException timedOut) {
1676	>	throw new AssertionFailedError("timed out");
1677	>	} catch (Exception fail) {
1678	>	AssertionFailedError afe =
1679	>	new AssertionFailedError("Unexpected exception: " + fail);
1680	>	afe.initCause(fail);
1681	>	throw afe;
1682		}
1683	<	catch(InterruptedException success) {
1683	>	}
1684	>	}
1685	>
1686	>	void checkEmpty(BlockingQueue q) {
1687	>	try {
1688	>	assertTrue(q.isEmpty());
1689	>	assertEquals(0, q.size());
1690	>	assertNull(q.peek());
1691	>	assertNull(q.poll());
1692	>	assertNull(q.poll(0, MILLISECONDS));
1693	>	assertEquals(q.toString(), "[]");
1694	>	assertTrue(Arrays.equals(q.toArray(), new Object[0]));
1695	>	assertFalse(q.iterator().hasNext());
1696	>	try {
1697	>	q.element();
1698	>	shouldThrow();
1699	>	} catch (NoSuchElementException success) {}
1700	>	try {
1701	>	q.iterator().next();
1702	>	shouldThrow();
1703	>	} catch (NoSuchElementException success) {}
1704	>	try {
1705	>	q.remove();
1706	>	shouldThrow();
1707	>	} catch (NoSuchElementException success) {}
1708	>	} catch (InterruptedException fail) { threadUnexpectedException(fail); }
1709	>	}
1710	>
1711	>	void assertSerialEquals(Object x, Object y) {
1712	>	assertTrue(Arrays.equals(serialBytes(x), serialBytes(y)));
1713	>	}
1714	>
1715	>	void assertNotSerialEquals(Object x, Object y) {
1716	>	assertFalse(Arrays.equals(serialBytes(x), serialBytes(y)));
1717	>	}
1718	>
1719	>	byte[] serialBytes(Object o) {
1720	>	try {
1721	>	ByteArrayOutputStream bos = new ByteArrayOutputStream();
1722	>	ObjectOutputStream oos = new ObjectOutputStream(bos);
1723	>	oos.writeObject(o);
1724	>	oos.flush();
1725	>	oos.close();
1726	>	return bos.toByteArray();
1727	>	} catch (Throwable fail) {
1728	>	threadUnexpectedException(fail);
1729	>	return new byte[0];
1730	>	}
1731	>	}
1732	>
1733	>	@SuppressWarnings("unchecked")
1734	>	<T> T serialClone(T o) {
1735	>	try {
1736	>	ObjectInputStream ois = new ObjectInputStream
1737	>	(new ByteArrayInputStream(serialBytes(o)));
1738	>	T clone = (T) ois.readObject();
1739	>	assertSame(o.getClass(), clone.getClass());
1740	>	return clone;
1741	>	} catch (Throwable fail) {
1742	>	threadUnexpectedException(fail);
1743	>	return null;
1744	>	}
1745	>	}
1746	>
1747	>	public void assertThrows(Class<? extends Throwable> expectedExceptionClass,
1748	>	Runnable... throwingActions) {
1749	>	for (Runnable throwingAction : throwingActions) {
1750	>	boolean threw = false;
1751	>	try { throwingAction.run(); }
1752	>	catch (Throwable t) {
1753	>	threw = true;
1754	>	if (!expectedExceptionClass.isInstance(t)) {
1755	>	AssertionFailedError afe =
1756	>	new AssertionFailedError
1757	>	("Expected " + expectedExceptionClass.getName() +
1758	>	", got " + t.getClass().getName());
1759	>	afe.initCause(t);
1760	>	threadUnexpectedException(afe);
1761	>	}
1762		}
1763	+	if (!threw)
1764	+	shouldThrow(expectedExceptionClass.getName());
1765		}
1766		}
1767	<
1767	>
1768	>	public void assertIteratorExhausted(Iterator<?> it) {
1769	>	try {
1770	>	it.next();
1771	>	shouldThrow();
1772	>	} catch (NoSuchElementException success) {}
1773	>	assertFalse(it.hasNext());
1774	>	}
1775		}

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