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Comparing jsr166/src/test/tck/JSR166TestCase.java (file contents):
Revision 1.7 by dl, Sat Oct 25 16:02:13 2003 UTC vs.
Revision 1.158 by jsr166, Sat Oct 3 23:17:03 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	<	import java.security.*;
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.security.CodeSource;
24	>	import java.security.Permission;
25	>	import java.security.PermissionCollection;
26	>	import java.security.Permissions;
27	>	import java.security.Policy;
28	>	import java.security.ProtectionDomain;
29	>	import java.security.SecurityPermission;
30	>	import java.util.ArrayList;
31	>	import java.util.Arrays;
32	>	import java.util.Date;
33	>	import java.util.Enumeration;
34	>	import java.util.Iterator;
35	>	import java.util.List;
36	>	import java.util.NoSuchElementException;
37	>	import java.util.PropertyPermission;
38	>	import java.util.concurrent.BlockingQueue;
39	>	import java.util.concurrent.Callable;
40	>	import java.util.concurrent.CountDownLatch;
41	>	import java.util.concurrent.CyclicBarrier;
42	>	import java.util.concurrent.ExecutionException;
43	>	import java.util.concurrent.Executors;
44	>	import java.util.concurrent.ExecutorService;
45	>	import java.util.concurrent.ForkJoinPool;
46	>	import java.util.concurrent.Future;
47	>	import java.util.concurrent.RecursiveAction;
48	>	import java.util.concurrent.RecursiveTask;
49	>	import java.util.concurrent.RejectedExecutionHandler;
50	>	import java.util.concurrent.Semaphore;
51	>	import java.util.concurrent.ThreadFactory;
52	>	import java.util.concurrent.ThreadPoolExecutor;
53	>	import java.util.concurrent.TimeoutException;
54	>	import java.util.concurrent.atomic.AtomicReference;
55	>	import java.util.regex.Pattern;
56	>
57	>	import junit.framework.AssertionFailedError;
58	>	import junit.framework.Test;
59	>	import junit.framework.TestCase;
60	>	import junit.framework.TestResult;
61	>	import junit.framework.TestSuite;
62
63		/**
64		* Base class for JSR166 Junit TCK tests.  Defines some constants,
65		* utility methods and classes, as well as a simple framework for
66		* helping to make sure that assertions failing in generated threads
67		* cause the associated test that generated them to itself fail (which
68	<	* JUnit doe not otherwise arrange).  The rules for creating such
68	>	* JUnit does not otherwise arrange).  The rules for creating such
69		* tests are:
70		*
71		* <ol>
72		*
73	<	* <li> All assertions in code running in generated threads must use
74	<	* the forms {@link threadFail} , {@link threadAssertTrue} {@link
75	<	* threadAssertEquals}, or {@link threadAssertNull}, (not
76	<	* <tt>fail</tt>, <tt>assertTrue</tt>, etc.) It is OK (but not
73	>	* <li>All assertions in code running in generated threads must use
74	>	* the forms {@link #threadFail}, {@link #threadAssertTrue}, {@link
75	>	* #threadAssertEquals}, or {@link #threadAssertNull}, (not
76	>	* {@code fail}, {@code assertTrue}, etc.) It is OK (but not
77		* particularly recommended) for other code to use these forms too.
78		* Only the most typically used JUnit assertion methods are defined
79	<	* this way, but enough to live with.</li>
79	>	* this way, but enough to live with.
80		*
81	<	* <li> If you override {@link setUp} or {@link tearDown}, make sure
82	<	* to invoke <tt>super.setUp</tt> and <tt>super.tearDown</tt> within
81	>	* <li>If you override {@link #setUp} or {@link #tearDown}, make sure
82	>	* to invoke {@code super.setUp} and {@code super.tearDown} within
83		* them. These methods are used to clear and check for thread
84	<	* assertion failures.</li>
84	>	* assertion failures.
85		*
86	<	* <li>All delays and timeouts must use one of the constants <tt>
87	<	* SHORT_DELAY_MS</tt>, <tt> SMALL_DELAY_MS</tt>, <tt> MEDIUM_DELAY_MS</tt>,
88	<	* <tt> LONG_DELAY_MS</tt>. The idea here is that a SHORT is always
86	>	* <li>All delays and timeouts must use one of the constants {@code
87	>	* SHORT_DELAY_MS}, {@code SMALL_DELAY_MS}, {@code MEDIUM_DELAY_MS},
88	>	* {@code LONG_DELAY_MS}. The idea here is that a SHORT is always
89		* discriminable from zero time, and always allows enough time for the
90		* small amounts of computation (creating a thread, calling a few
91		* methods, etc) needed to reach a timeout point. Similarly, a SMALL
92		* is always discriminable as larger than SHORT and smaller than
93		* MEDIUM.  And so on. These constants are set to conservative values,
94		* but even so, if there is ever any doubt, they can all be increased
95	<	* in one spot to rerun tests on slower platforms</li>
95	>	* in one spot to rerun tests on slower platforms.
96		*
97	<	* <li> All threads generated must be joined inside each test case
98	<	* method (or <tt>fail</tt> to do so) before returning from the
99	<	* method. The <tt> joinPool</tt> method can be used to do this when
100	<	* using Executors.</li>
97	>	* <li>All threads generated must be joined inside each test case
98	>	* method (or {@code fail} to do so) before returning from the
99	>	* method. The {@code joinPool} method can be used to do this when
100	>	* using Executors.
101		*
102		* </ol>
103		*
104	<	* <p> <b>Other notes</b>
104	>	* <p><b>Other notes</b>
105		* <ul>
106		*
107	<	* <li> Usually, there is one testcase method per JSR166 method
107	>	* <li>Usually, there is one testcase method per JSR166 method
108		* covering "normal" operation, and then as many exception-testing
109		* methods as there are exceptions the method can throw. Sometimes
110		* there are multiple tests per JSR166 method when the different
111		* "normal" behaviors differ significantly. And sometimes testcases
112		* cover multiple methods when they cannot be tested in
113	<	* isolation.</li>
114	<	*
115	<	* <li> The documentation style for testcases is to provide as javadoc
113	>	* isolation.
114	>	*
115	>	* <li>The documentation style for testcases is to provide as javadoc
116		* a simple sentence or two describing the property that the testcase
117		* method purports to test. The javadocs do not say anything about how
118	<	* the property is tested. To find out, read the code.</li>
118	>	* the property is tested. To find out, read the code.
119		*
120	<	* <li> These tests are "conformance tests", and do not attempt to
120	>	* <li>These tests are "conformance tests", and do not attempt to
121		* test throughput, latency, scalability or other performance factors
122		* (see the separate "jtreg" tests for a set intended to check these
123		* for the most central aspects of functionality.) So, most tests use
124		* the smallest sensible numbers of threads, collection sizes, etc
125	<	* needed to check basic conformance.</li>
125	>	* needed to check basic conformance.
126		*
127		* <li>The test classes currently do not declare inclusion in
128		* any particular package to simplify things for people integrating
129	<	* them in TCK test suites.</li>
129	>	* them in TCK test suites.
130		*
131	<	* <li> As a convenience, the <tt>main</tt> of this class (JSR166TestCase)
132	<	* runs all JSR166 unit tests.</li>
131	>	* <li>As a convenience, the {@code main} of this class (JSR166TestCase)
132	>	* runs all JSR166 unit tests.
133		*
134		* </ul>
135		*/
136		public class JSR166TestCase extends TestCase {
137	+	private static final boolean useSecurityManager =
138	+	Boolean.getBoolean("jsr166.useSecurityManager");
139	+
140	+	protected static final boolean expensiveTests =
141	+	Boolean.getBoolean("jsr166.expensiveTests");
142	+
143	+	/**
144	+	* If true, also run tests that are not part of the official tck
145	+	* because they test unspecified implementation details.
146	+	*/
147	+	protected static final boolean testImplementationDetails =
148	+	Boolean.getBoolean("jsr166.testImplementationDetails");
149	+
150	+	/**
151	+	* If true, report on stdout all "slow" tests, that is, ones that
152	+	* take more than profileThreshold milliseconds to execute.
153	+	*/
154	+	private static final boolean profileTests =
155	+	Boolean.getBoolean("jsr166.profileTests");
156	+
157	+	/**
158	+	* The number of milliseconds that tests are permitted for
159	+	* execution without being reported, when profileTests is set.
160	+	*/
161	+	private static final long profileThreshold =
162	+	Long.getLong("jsr166.profileThreshold", 100);
163	+
164	+	/**
165	+	* The number of repetitions per test (for tickling rare bugs).
166	+	*/
167	+	private static final int runsPerTest =
168	+	Integer.getInteger("jsr166.runsPerTest", 1);
169	+
170	+	/**
171	+	* The number of repetitions of the test suite (for finding leaks?).
172	+	*/
173	+	private static final int suiteRuns =
174	+	Integer.getInteger("jsr166.suiteRuns", 1);
175	+
176	+	public JSR166TestCase() { super(); }
177	+	public JSR166TestCase(String name) { super(name); }
178	+
179	+	/**
180	+	* A filter for tests to run, matching strings of the form
181	+	* methodName(className), e.g. "testInvokeAll5(ForkJoinPoolTest)"
182	+	* Usefully combined with jsr166.runsPerTest.
183	+	*/
184	+	private static final Pattern methodFilter = methodFilter();
185	+
186	+	private static Pattern methodFilter() {
187	+	String regex = System.getProperty("jsr166.methodFilter");
188	+	return (regex == null) ? null : Pattern.compile(regex);
189	+	}
190	+
191	+	static volatile TestCase currentTestCase;
192	+	static {
193	+	Runnable checkForWedgedTest = new Runnable() { public void run() {
194	+	// avoid spurious reports with enormous runsPerTest
195	+	final int timeoutMinutes = Math.max(runsPerTest / 10, 1);
196	+	for (TestCase lastTestCase = currentTestCase;;) {
197	+	try { MINUTES.sleep(timeoutMinutes); }
198	+	catch (InterruptedException unexpected) { break; }
199	+	if (lastTestCase == currentTestCase) {
200	+	System.err.println
201	+	("Looks like we're stuck running test: "
202	+	+ lastTestCase);
203	+	dumpTestThreads();
204	+	}
205	+	lastTestCase = currentTestCase;
206	+	}}};
207	+	Thread thread = new Thread(checkForWedgedTest, "checkForWedgedTest");
208	+	thread.setDaemon(true);
209	+	thread.start();
210	+	}
211	+
212	+	public void runBare() throws Throwable {
213	+	currentTestCase = this;
214	+	if (methodFilter == null
215	+	|| methodFilter.matcher(toString()).find())
216	+	super.runBare();
217	+	}
218	+
219	+	protected void runTest() throws Throwable {
220	+	for (int i = 0; i < runsPerTest; i++) {
221	+	if (profileTests)
222	+	runTestProfiled();
223	+	else
224	+	super.runTest();
225	+	}
226	+	}
227	+
228	+	protected void runTestProfiled() throws Throwable {
229	+	for (int i = 0; i < 2; i++) {
230	+	long startTime = System.nanoTime();
231	+	super.runTest();
232	+	long elapsedMillis = millisElapsedSince(startTime);
233	+	if (elapsedMillis < profileThreshold)
234	+	break;
235	+	// Never report first run of any test; treat it as a
236	+	// warmup run, notably to trigger all needed classloading,
237	+	if (i > 0)
238	+	System.out.printf("%n%s: %d%n", toString(), elapsedMillis);
239	+	}
240	+	}
241	+
242		/**
243	<	* Runs all JSR166 unit tests using junit.textui.TestRunner
244	<	*/
245	<	public static void main (String[] args) {
246	<	junit.textui.TestRunner.run (suite());
243	>	* Runs all JSR166 unit tests using junit.textui.TestRunner.
244	>	*/
245	>	public static void main(String[] args) {
246	>	main(suite(), args);
247		}
248
249		/**
250	<	* Collects all JSR166 unit tests as one suite
251	<	*/
252	<	public static Test suite ( ) {
253	<	TestSuite suite = new TestSuite("JSR166 Unit Tests");
254	<
255	<	suite.addTest(new TestSuite(ArrayBlockingQueueTest.class));
256	<	suite.addTest(new TestSuite(AtomicBooleanTest.class));
257	<	suite.addTest(new TestSuite(AtomicIntegerArrayTest.class));
258	<	suite.addTest(new TestSuite(AtomicIntegerFieldUpdaterTest.class));
259	<	suite.addTest(new TestSuite(AtomicIntegerTest.class));
260	<	suite.addTest(new TestSuite(AtomicLongArrayTest.class));
261	<	suite.addTest(new TestSuite(AtomicLongFieldUpdaterTest.class));
262	<	suite.addTest(new TestSuite(AtomicLongTest.class));
263	<	suite.addTest(new TestSuite(AtomicMarkableReferenceTest.class));
264	<	suite.addTest(new TestSuite(AtomicReferenceArrayTest.class));
265	<	suite.addTest(new TestSuite(AtomicReferenceFieldUpdaterTest.class));
266	<	suite.addTest(new TestSuite(AtomicReferenceTest.class));
267	<	suite.addTest(new TestSuite(AtomicStampedReferenceTest.class));
268	<	suite.addTest(new TestSuite(CancellableTaskTest.class));
269	<	suite.addTest(new TestSuite(ConcurrentHashMapTest.class));
270	<	suite.addTest(new TestSuite(ConcurrentLinkedQueueTest.class));
271	<	suite.addTest(new TestSuite(CopyOnWriteArrayListTest.class));
272	<	suite.addTest(new TestSuite(CopyOnWriteArraySetTest.class));
273	<	suite.addTest(new TestSuite(CountDownLatchTest.class));
274	<	suite.addTest(new TestSuite(CyclicBarrierTest.class));
275	<	suite.addTest(new TestSuite(DelayQueueTest.class));
276	<	suite.addTest(new TestSuite(ExchangerTest.class));
277	<	suite.addTest(new TestSuite(ExecutorsTest.class));
124	<	suite.addTest(new TestSuite(FairSemaphoreTest.class));
125	<	suite.addTest(new TestSuite(FutureTaskTest.class));
126	<	suite.addTest(new TestSuite(LinkedBlockingQueueTest.class));
127	<	suite.addTest(new TestSuite(LinkedListTest.class));
128	<	suite.addTest(new TestSuite(LockSupportTest.class));
129	<	suite.addTest(new TestSuite(PriorityBlockingQueueTest.class));
130	<	suite.addTest(new TestSuite(PriorityQueueTest.class));
131	<	suite.addTest(new TestSuite(PrivilegedFutureTaskTest.class));
132	<	suite.addTest(new TestSuite(ReentrantLockTest.class));
133	<	suite.addTest(new TestSuite(ReentrantReadWriteLockTest.class));
134	<	suite.addTest(new TestSuite(ScheduledExecutorTest.class));
135	<	suite.addTest(new TestSuite(SemaphoreTest.class));
136	<	suite.addTest(new TestSuite(SynchronousQueueTest.class));
137	<	suite.addTest(new TestSuite(SystemTest.class));
138	<	suite.addTest(new TestSuite(ThreadLocalTest.class));
139	<	suite.addTest(new TestSuite(ThreadPoolExecutorTest.class));
140	<	suite.addTest(new TestSuite(ThreadTest.class));
141	<	suite.addTest(new TestSuite(TimeUnitTest.class));
142	<
250	>	* Runs all unit tests in the given test suite.
251	>	* Actual behavior influenced by jsr166.* system properties.
252	>	*/
253	>	static void main(Test suite, String[] args) {
254	>	if (useSecurityManager) {
255	>	System.err.println("Setting a permissive security manager");
256	>	Policy.setPolicy(permissivePolicy());
257	>	System.setSecurityManager(new SecurityManager());
258	>	}
259	>	for (int i = 0; i < suiteRuns; i++) {
260	>	TestResult result = junit.textui.TestRunner.run(suite);
261	>	if (!result.wasSuccessful())
262	>	System.exit(1);
263	>	System.gc();
264	>	System.runFinalization();
265	>	}
266	>	}
267	>
268	>	public static TestSuite newTestSuite(Object... suiteOrClasses) {
269	>	TestSuite suite = new TestSuite();
270	>	for (Object suiteOrClass : suiteOrClasses) {
271	>	if (suiteOrClass instanceof TestSuite)
272	>	suite.addTest((TestSuite) suiteOrClass);
273	>	else if (suiteOrClass instanceof Class)
274	>	suite.addTest(new TestSuite((Class<?>) suiteOrClass));
275	>	else
276	>	throw new ClassCastException("not a test suite or class");
277	>	}
278		return suite;
279		}
280
281	+	public static void addNamedTestClasses(TestSuite suite,
282	+	String... testClassNames) {
283	+	for (String testClassName : testClassNames) {
284	+	try {
285	+	Class<?> testClass = Class.forName(testClassName);
286	+	Method m = testClass.getDeclaredMethod("suite",
287	+	new Class<?>[0]);
288	+	suite.addTest(newTestSuite((Test)m.invoke(null)));
289	+	} catch (Exception e) {
290	+	throw new Error("Missing test class", e);
291	+	}
292	+	}
293	+	}
294	+
295	+	public static final double JAVA_CLASS_VERSION;
296	+	public static final String JAVA_SPECIFICATION_VERSION;
297	+	static {
298	+	try {
299	+	JAVA_CLASS_VERSION = java.security.AccessController.doPrivileged(
300	+	new java.security.PrivilegedAction<Double>() {
301	+	public Double run() {
302	+	return Double.valueOf(System.getProperty("java.class.version"));}});
303	+	JAVA_SPECIFICATION_VERSION = java.security.AccessController.doPrivileged(
304	+	new java.security.PrivilegedAction<String>() {
305	+	public String run() {
306	+	return System.getProperty("java.specification.version");}});
307	+	} catch (Throwable t) {
308	+	throw new Error(t);
309	+	}
310	+	}
311	+
312	+	public static boolean atLeastJava6() { return JAVA_CLASS_VERSION >= 50.0; }
313	+	public static boolean atLeastJava7() { return JAVA_CLASS_VERSION >= 51.0; }
314	+	public static boolean atLeastJava8() { return JAVA_CLASS_VERSION >= 52.0; }
315	+	public static boolean atLeastJava9() {
316	+	return JAVA_CLASS_VERSION >= 53.0
317	+	// As of 2015-09, java9 still uses 52.0 class file version
318	+	|| JAVA_SPECIFICATION_VERSION.matches("^(1\\.)?(9|[0-9][0-9])$");
319	+	}
320	+	public static boolean atLeastJava10() {
321	+	return JAVA_CLASS_VERSION >= 54.0
322	+	|| JAVA_SPECIFICATION_VERSION.matches("^(1\\.)?[0-9][0-9]$");
323	+	}
324	+
325	+	/**
326	+	* Collects all JSR166 unit tests as one suite.
327	+	*/
328	+	public static Test suite() {
329	+	// Java7+ test classes
330	+	TestSuite suite = newTestSuite(
331	+	ForkJoinPoolTest.suite(),
332	+	ForkJoinTaskTest.suite(),
333	+	RecursiveActionTest.suite(),
334	+	RecursiveTaskTest.suite(),
335	+	LinkedTransferQueueTest.suite(),
336	+	PhaserTest.suite(),
337	+	ThreadLocalRandomTest.suite(),
338	+	AbstractExecutorServiceTest.suite(),
339	+	AbstractQueueTest.suite(),
340	+	AbstractQueuedSynchronizerTest.suite(),
341	+	AbstractQueuedLongSynchronizerTest.suite(),
342	+	ArrayBlockingQueueTest.suite(),
343	+	ArrayDequeTest.suite(),
344	+	AtomicBooleanTest.suite(),
345	+	AtomicIntegerArrayTest.suite(),
346	+	AtomicIntegerFieldUpdaterTest.suite(),
347	+	AtomicIntegerTest.suite(),
348	+	AtomicLongArrayTest.suite(),
349	+	AtomicLongFieldUpdaterTest.suite(),
350	+	AtomicLongTest.suite(),
351	+	AtomicMarkableReferenceTest.suite(),
352	+	AtomicReferenceArrayTest.suite(),
353	+	AtomicReferenceFieldUpdaterTest.suite(),
354	+	AtomicReferenceTest.suite(),
355	+	AtomicStampedReferenceTest.suite(),
356	+	ConcurrentHashMapTest.suite(),
357	+	ConcurrentLinkedDequeTest.suite(),
358	+	ConcurrentLinkedQueueTest.suite(),
359	+	ConcurrentSkipListMapTest.suite(),
360	+	ConcurrentSkipListSubMapTest.suite(),
361	+	ConcurrentSkipListSetTest.suite(),
362	+	ConcurrentSkipListSubSetTest.suite(),
363	+	CopyOnWriteArrayListTest.suite(),
364	+	CopyOnWriteArraySetTest.suite(),
365	+	CountDownLatchTest.suite(),
366	+	CyclicBarrierTest.suite(),
367	+	DelayQueueTest.suite(),
368	+	EntryTest.suite(),
369	+	ExchangerTest.suite(),
370	+	ExecutorsTest.suite(),
371	+	ExecutorCompletionServiceTest.suite(),
372	+	FutureTaskTest.suite(),
373	+	LinkedBlockingDequeTest.suite(),
374	+	LinkedBlockingQueueTest.suite(),
375	+	LinkedListTest.suite(),
376	+	LockSupportTest.suite(),
377	+	PriorityBlockingQueueTest.suite(),
378	+	PriorityQueueTest.suite(),
379	+	ReentrantLockTest.suite(),
380	+	ReentrantReadWriteLockTest.suite(),
381	+	ScheduledExecutorTest.suite(),
382	+	ScheduledExecutorSubclassTest.suite(),
383	+	SemaphoreTest.suite(),
384	+	SynchronousQueueTest.suite(),
385	+	SystemTest.suite(),
386	+	ThreadLocalTest.suite(),
387	+	ThreadPoolExecutorTest.suite(),
388	+	ThreadPoolExecutorSubclassTest.suite(),
389	+	ThreadTest.suite(),
390	+	TimeUnitTest.suite(),
391	+	TreeMapTest.suite(),
392	+	TreeSetTest.suite(),
393	+	TreeSubMapTest.suite(),
394	+	TreeSubSetTest.suite());
395	+
396	+	// Java8+ test classes
397	+	if (atLeastJava8()) {
398	+	String[] java8TestClassNames = {
399	+	"Atomic8Test",
400	+	"CompletableFutureTest",
401	+	"ConcurrentHashMap8Test",
402	+	"CountedCompleterTest",
403	+	"DoubleAccumulatorTest",
404	+	"DoubleAdderTest",
405	+	"ForkJoinPool8Test",
406	+	"ForkJoinTask8Test",
407	+	"LongAccumulatorTest",
408	+	"LongAdderTest",
409	+	"SplittableRandomTest",
410	+	"StampedLockTest",
411	+	"SubmissionPublisherTest",
412	+	"ThreadLocalRandom8Test",
413	+	};
414	+	addNamedTestClasses(suite, java8TestClassNames);
415	+	}
416	+
417	+	// Java9+ test classes
418	+	if (atLeastJava9()) {
419	+	String[] java9TestClassNames = {
420	+	// Currently empty, but expecting varhandle tests
421	+	};
422	+	addNamedTestClasses(suite, java9TestClassNames);
423	+	}
424	+
425	+	return suite;
426	+	}
427	+
428	+	/** Returns list of junit-style test method names in given class. */
429	+	public static ArrayList<String> testMethodNames(Class<?> testClass) {
430	+	Method[] methods = testClass.getDeclaredMethods();
431	+	ArrayList<String> names = new ArrayList<String>(methods.length);
432	+	for (Method method : methods) {
433	+	if (method.getName().startsWith("test")
434	+	&& Modifier.isPublic(method.getModifiers())
435	+	// method.getParameterCount() requires jdk8+
436	+	&& method.getParameterTypes().length == 0) {
437	+	names.add(method.getName());
438	+	}
439	+	}
440	+	return names;
441	+	}
442	+
443	+	/**
444	+	* Returns junit-style testSuite for the given test class, but
445	+	* parameterized by passing extra data to each test.
446	+	*/
447	+	public static <ExtraData> Test parameterizedTestSuite
448	+	(Class<? extends JSR166TestCase> testClass,
449	+	Class<ExtraData> dataClass,
450	+	ExtraData data) {
451	+	try {
452	+	TestSuite suite = new TestSuite();
453	+	Constructor c =
454	+	testClass.getDeclaredConstructor(dataClass, String.class);
455	+	for (String methodName : testMethodNames(testClass))
456	+	suite.addTest((Test) c.newInstance(data, methodName));
457	+	return suite;
458	+	} catch (Exception e) {
459	+	throw new Error(e);
460	+	}
461	+	}
462	+
463	+	/**
464	+	* Returns junit-style testSuite for the jdk8 extension of the
465	+	* given test class, but parameterized by passing extra data to
466	+	* each test.  Uses reflection to allow compilation in jdk7.
467	+	*/
468	+	public static <ExtraData> Test jdk8ParameterizedTestSuite
469	+	(Class<? extends JSR166TestCase> testClass,
470	+	Class<ExtraData> dataClass,
471	+	ExtraData data) {
472	+	if (atLeastJava8()) {
473	+	String name = testClass.getName();
474	+	String name8 = name.replaceAll("Test$", "8Test");
475	+	if (name.equals(name8)) throw new Error(name);
476	+	try {
477	+	return (Test)
478	+	Class.forName(name8)
479	+	.getMethod("testSuite", new Class[] { dataClass })
480	+	.invoke(null, data);
481	+	} catch (Exception e) {
482	+	throw new Error(e);
483	+	}
484	+	} else {
485	+	return new TestSuite();
486	+	}
487	+	}
488	+
489	+	// Delays for timing-dependent tests, in milliseconds.
490
491		public static long SHORT_DELAY_MS;
492		public static long SMALL_DELAY_MS;
493		public static long MEDIUM_DELAY_MS;
494		public static long LONG_DELAY_MS;
495
152	–
496		/**
497	<	* Return the shortest timed delay. This could
498	<	* be reimplmented to use for example a Property.
499	<	*/
497	>	* Returns the shortest timed delay. This could
498	>	* be reimplemented to use for example a Property.
499	>	*/
500		protected long getShortDelay() {
501	<	return 100;
501	>	return 50;
502		}
503
161	–
504		/**
505	<	* Set delays as multiples of SHORT_DELAY.
505	>	* Sets delays as multiples of SHORT_DELAY.
506		*/
507	<	protected  void setDelays() {
507	>	protected void setDelays() {
508		SHORT_DELAY_MS = getShortDelay();
509	<	SMALL_DELAY_MS = SHORT_DELAY_MS * 5;
509	>	SMALL_DELAY_MS  = SHORT_DELAY_MS * 5;
510		MEDIUM_DELAY_MS = SHORT_DELAY_MS * 10;
511	<	LONG_DELAY_MS = SHORT_DELAY_MS * 50;
511	>	LONG_DELAY_MS   = SHORT_DELAY_MS * 200;
512	>	}
513	>
514	>	/**
515	>	* Returns a timeout in milliseconds to be used in tests that
516	>	* verify that operations block or time out.
517	>	*/
518	>	long timeoutMillis() {
519	>	return SHORT_DELAY_MS / 4;
520	>	}
521	>
522	>	/**
523	>	* Returns a new Date instance representing a time at least
524	>	* delayMillis milliseconds in the future.
525	>	*/
526	>	Date delayedDate(long delayMillis) {
527	>	// Add 1 because currentTimeMillis is known to round into the past.
528	>	return new Date(System.currentTimeMillis() + delayMillis + 1);
529		}
530
531		/**
532	<	* Flag set true if any threadAssert methods fail
532	>	* The first exception encountered if any threadAssertXXX method fails.
533		*/
534	<	volatile boolean threadFailed;
534	>	private final AtomicReference<Throwable> threadFailure
535	>	= new AtomicReference<Throwable>(null);
536
537		/**
538	<	* Initialize test to indicate that no thread assertions have failed
538	>	* Records an exception so that it can be rethrown later in the test
539	>	* harness thread, triggering a test case failure.  Only the first
540	>	* failure is recorded; subsequent calls to this method from within
541	>	* the same test have no effect.
542		*/
543	<	public void setUp() {
543	>	public void threadRecordFailure(Throwable t) {
544	>	System.err.println(t);
545	>	dumpTestThreads();
546	>	threadFailure.compareAndSet(null, t);
547	>	}
548	>
549	>	public void setUp() {
550		setDelays();
551	<	threadFailed = false;
551	>	}
552	>
553	>	void tearDownFail(String format, Object... args) {
554	>	String msg = toString() + ": " + String.format(format, args);
555	>	System.err.println(msg);
556	>	dumpTestThreads();
557	>	throw new AssertionFailedError(msg);
558	>	}
559	>
560	>	/**
561	>	* Extra checks that get done for all test cases.
562	>	*
563	>	* Triggers test case failure if any thread assertions have failed,
564	>	* by rethrowing, in the test harness thread, any exception recorded
565	>	* earlier by threadRecordFailure.
566	>	*
567	>	* Triggers test case failure if interrupt status is set in the main thread.
568	>	*/
569	>	public void tearDown() throws Exception {
570	>	Throwable t = threadFailure.getAndSet(null);
571	>	if (t != null) {
572	>	if (t instanceof Error)
573	>	throw (Error) t;
574	>	else if (t instanceof RuntimeException)
575	>	throw (RuntimeException) t;
576	>	else if (t instanceof Exception)
577	>	throw (Exception) t;
578	>	else {
579	>	AssertionFailedError afe =
580	>	new AssertionFailedError(t.toString());
581	>	afe.initCause(t);
582	>	throw afe;
583	>	}
584	>	}
585	>
586	>	if (Thread.interrupted())
587	>	tearDownFail("interrupt status set in main thread");
588	>
589	>	checkForkJoinPoolThreadLeaks();
590		}
591
592		/**
593	<	* Trigger test case failure if any thread assertions have failed
593	>	* Finds missing try { ... } finally { joinPool(e); }
594		*/
595	<	public void tearDown() {
596	<	assertFalse(threadFailed);
595	>	void checkForkJoinPoolThreadLeaks() throws InterruptedException {
596	>	Thread[] survivors = new Thread[7];
597	>	int count = Thread.enumerate(survivors);
598	>	for (int i = 0; i < count; i++) {
599	>	Thread thread = survivors[i];
600	>	String name = thread.getName();
601	>	if (name.startsWith("ForkJoinPool-")) {
602	>	// give thread some time to terminate
603	>	thread.join(LONG_DELAY_MS);
604	>	if (thread.isAlive())
605	>	tearDownFail("Found leaked ForkJoinPool thread thread=%s",
606	>	thread);
607	>	}
608	>	}
609	>
610	>	if (!ForkJoinPool.commonPool()
611	>	.awaitQuiescence(LONG_DELAY_MS, MILLISECONDS))
612	>	tearDownFail("ForkJoin common pool thread stuck");
613		}
614
615		/**
616	<	* Fail, also setting status to indicate current testcase should fail
617	<	*/
616	>	* Just like fail(reason), but additionally recording (using
617	>	* threadRecordFailure) any AssertionFailedError thrown, so that
618	>	* the current testcase will fail.
619	>	*/
620		public void threadFail(String reason) {
621	<	threadFailed = true;
622	<	fail(reason);
621	>	try {
622	>	fail(reason);
623	>	} catch (AssertionFailedError t) {
624	>	threadRecordFailure(t);
625	>	throw t;
626	>	}
627		}
628
629		/**
630	<	* If expression not true, set status to indicate current testcase
631	<	* should fail
632	<	*/
630	>	* Just like assertTrue(b), but additionally recording (using
631	>	* threadRecordFailure) any AssertionFailedError thrown, so that
632	>	* the current testcase will fail.
633	>	*/
634		public void threadAssertTrue(boolean b) {
635	<	if (!b) {
206	<	threadFailed = true;
635	>	try {
636		assertTrue(b);
637	+	} catch (AssertionFailedError t) {
638	+	threadRecordFailure(t);
639	+	throw t;
640		}
641		}
642
643		/**
644	<	* If expression not false, set status to indicate current testcase
645	<	* should fail
646	<	*/
644	>	* Just like assertFalse(b), but additionally recording (using
645	>	* threadRecordFailure) any AssertionFailedError thrown, so that
646	>	* the current testcase will fail.
647	>	*/
648		public void threadAssertFalse(boolean b) {
649	<	if (b) {
217	<	threadFailed = true;
649	>	try {
650		assertFalse(b);
651	+	} catch (AssertionFailedError t) {
652	+	threadRecordFailure(t);
653	+	throw t;
654		}
655		}
656
657		/**
658	<	* If argument not null, set status to indicate current testcase
659	<	* should fail
660	<	*/
658	>	* Just like assertNull(x), but additionally recording (using
659	>	* threadRecordFailure) any AssertionFailedError thrown, so that
660	>	* the current testcase will fail.
661	>	*/
662		public void threadAssertNull(Object x) {
663	<	if (x != null) {
228	<	threadFailed = true;
663	>	try {
664		assertNull(x);
665	+	} catch (AssertionFailedError t) {
666	+	threadRecordFailure(t);
667	+	throw t;
668		}
669		}
670
671		/**
672	<	* If arguments not equal, set status to indicate current testcase
673	<	* should fail
674	<	*/
672	>	* Just like assertEquals(x, y), but additionally recording (using
673	>	* threadRecordFailure) any AssertionFailedError thrown, so that
674	>	* the current testcase will fail.
675	>	*/
676		public void threadAssertEquals(long x, long y) {
677	<	if (x != y) {
239	<	threadFailed = true;
677	>	try {
678		assertEquals(x, y);
679	+	} catch (AssertionFailedError t) {
680	+	threadRecordFailure(t);
681	+	throw t;
682		}
683		}
684
685		/**
686	<	* If arguments not equal, set status to indicate current testcase
687	<	* should fail
688	<	*/
686	>	* Just like assertEquals(x, y), but additionally recording (using
687	>	* threadRecordFailure) any AssertionFailedError thrown, so that
688	>	* the current testcase will fail.
689	>	*/
690		public void threadAssertEquals(Object x, Object y) {
691	<	if (x != y && (x == null || !x.equals(y))) {
250	<	threadFailed = true;
691	>	try {
692		assertEquals(x, y);
693	+	} catch (AssertionFailedError fail) {
694	+	threadRecordFailure(fail);
695	+	throw fail;
696	+	} catch (Throwable fail) {
697	+	threadUnexpectedException(fail);
698	+	}
699	+	}
700	+
701	+	/**
702	+	* Just like assertSame(x, y), but additionally recording (using
703	+	* threadRecordFailure) any AssertionFailedError thrown, so that
704	+	* the current testcase will fail.
705	+	*/
706	+	public void threadAssertSame(Object x, Object y) {
707	+	try {
708	+	assertSame(x, y);
709	+	} catch (AssertionFailedError fail) {
710	+	threadRecordFailure(fail);
711	+	throw fail;
712		}
713		}
714
715		/**
716	<	* threadFail with message "should throw exception"
717	<	*/
716	>	* Calls threadFail with message "should throw exception".
717	>	*/
718		public void threadShouldThrow() {
719	<	threadFailed = true;
260	<	fail("should throw exception");
719	>	threadFail("should throw exception");
720		}
721
722		/**
723	<	* threadFail with message "Unexpected exception"
723	>	* Calls threadFail with message "should throw" + exceptionName.
724		*/
725	<	public void threadUnexpectedException() {
726	<	threadFailed = true;
268	<	fail("Unexpected exception");
725	>	public void threadShouldThrow(String exceptionName) {
726	>	threadFail("should throw " + exceptionName);
727		}
728
729	+	/**
730	+	* Records the given exception using {@link #threadRecordFailure},
731	+	* then rethrows the exception, wrapping it in an
732	+	* AssertionFailedError if necessary.
733	+	*/
734	+	public void threadUnexpectedException(Throwable t) {
735	+	threadRecordFailure(t);
736	+	t.printStackTrace();
737	+	if (t instanceof RuntimeException)
738	+	throw (RuntimeException) t;
739	+	else if (t instanceof Error)
740	+	throw (Error) t;
741	+	else {
742	+	AssertionFailedError afe =
743	+	new AssertionFailedError("unexpected exception: " + t);
744	+	afe.initCause(t);
745	+	throw afe;
746	+	}
747	+	}
748	+
749	+	/**
750	+	* Delays, via Thread.sleep, for the given millisecond delay, but
751	+	* if the sleep is shorter than specified, may re-sleep or yield
752	+	* until time elapses.
753	+	*/
754	+	static void delay(long millis) throws InterruptedException {
755	+	long startTime = System.nanoTime();
756	+	long ns = millis * 1000 * 1000;
757	+	for (;;) {
758	+	if (millis > 0L)
759	+	Thread.sleep(millis);
760	+	else // too short to sleep
761	+	Thread.yield();
762	+	long d = ns - (System.nanoTime() - startTime);
763	+	if (d > 0L)
764	+	millis = d / (1000 * 1000);
765	+	else
766	+	break;
767	+	}
768	+	}
769	+
770	+	/**
771	+	* Allows use of try-with-resources with per-test thread pools.
772	+	*/
773	+	class PoolCloser<T extends ExecutorService>
774	+	implements AutoCloseable {
775	+	public final T pool;
776	+	public PoolCloser(T pool) { this.pool = pool; }
777	+	public void close() { joinPool(pool); }
778	+	}
779
780		/**
781	<	* Wait out termination of a thread pool or fail doing so
781	>	* Waits out termination of a thread pool or fails doing so.
782		*/
783	<	public void joinPool(ExecutorService exec) {
783	>	void joinPool(ExecutorService pool) {
784		try {
785	<	exec.shutdown();
786	<	assertTrue(exec.awaitTermination(LONG_DELAY_MS, TimeUnit.MILLISECONDS));
787	<	} catch(InterruptedException ie) {
788	<	fail("Unexpected exception");
785	>	pool.shutdown();
786	>	if (!pool.awaitTermination(2 * LONG_DELAY_MS, MILLISECONDS)) {
787	>	try {
788	>	threadFail("ExecutorService " + pool +
789	>	" did not terminate in a timely manner");
790	>	} finally {
791	>	// last resort, for the benefit of subsequent tests
792	>	pool.shutdownNow();
793	>	pool.awaitTermination(SMALL_DELAY_MS, MILLISECONDS);
794	>	}
795	>	}
796	>	} catch (SecurityException ok) {
797	>	// Allowed in case test doesn't have privs
798	>	} catch (InterruptedException fail) {
799	>	threadFail("Unexpected InterruptedException");
800	>	}
801	>	}
802	>
803	>	/** Like Runnable, but with the freedom to throw anything */
804	>	interface Action { public void run() throws Throwable; }
805	>
806	>	/**
807	>	* Runs all the given actions in parallel, failing if any fail.
808	>	* Useful for running multiple variants of tests that are
809	>	* necessarily individually slow because they must block.
810	>	*/
811	>	void testInParallel(Action ... actions) {
812	>	try (PoolCloser<ExecutorService> poolCloser
813	>	= new PoolCloser<>(Executors.newCachedThreadPool())) {
814	>	ExecutorService pool = poolCloser.pool;
815	>	ArrayList<Future<?>> futures = new ArrayList<>(actions.length);
816	>	for (final Action action : actions)
817	>	futures.add(pool.submit(new CheckedRunnable() {
818	>	public void realRun() throws Throwable { action.run();}}));
819	>	for (Future<?> future : futures)
820	>	try {
821	>	assertNull(future.get(LONG_DELAY_MS, MILLISECONDS));
822	>	} catch (ExecutionException ex) {
823	>	threadUnexpectedException(ex.getCause());
824	>	} catch (Exception ex) {
825	>	threadUnexpectedException(ex);
826	>	}
827		}
828		}
829
830	+	/**
831	+	* A debugging tool to print stack traces of most threads, as jstack does.
832	+	* Uninteresting threads are filtered out.
833	+	*/
834	+	static void dumpTestThreads() {
835	+	ThreadMXBean threadMXBean = ManagementFactory.getThreadMXBean();
836	+	System.err.println("------ stacktrace dump start ------");
837	+	for (ThreadInfo info : threadMXBean.dumpAllThreads(true, true)) {
838	+	String name = info.getThreadName();
839	+	if ("Signal Dispatcher".equals(name))
840	+	continue;
841	+	if ("Reference Handler".equals(name)
842	+	&& info.getLockName().startsWith("java.lang.ref.Reference$Lock"))
843	+	continue;
844	+	if ("Finalizer".equals(name)
845	+	&& info.getLockName().startsWith("java.lang.ref.ReferenceQueue$Lock"))
846	+	continue;
847	+	if ("checkForWedgedTest".equals(name))
848	+	continue;
849	+	System.err.print(info);
850	+	}
851	+	System.err.println("------ stacktrace dump end ------");
852	+	}
853
854		/**
855	<	* fail with message "should throw exception"
856	<	*/
855	>	* Checks that thread does not terminate within the default
856	>	* millisecond delay of {@code timeoutMillis()}.
857	>	*/
858	>	void assertThreadStaysAlive(Thread thread) {
859	>	assertThreadStaysAlive(thread, timeoutMillis());
860	>	}
861	>
862	>	/**
863	>	* Checks that thread does not terminate within the given millisecond delay.
864	>	*/
865	>	void assertThreadStaysAlive(Thread thread, long millis) {
866	>	try {
867	>	// No need to optimize the failing case via Thread.join.
868	>	delay(millis);
869	>	assertTrue(thread.isAlive());
870	>	} catch (InterruptedException fail) {
871	>	threadFail("Unexpected InterruptedException");
872	>	}
873	>	}
874	>
875	>	/**
876	>	* Checks that the threads do not terminate within the default
877	>	* millisecond delay of {@code timeoutMillis()}.
878	>	*/
879	>	void assertThreadsStayAlive(Thread... threads) {
880	>	assertThreadsStayAlive(timeoutMillis(), threads);
881	>	}
882	>
883	>	/**
884	>	* Checks that the threads do not terminate within the given millisecond delay.
885	>	*/
886	>	void assertThreadsStayAlive(long millis, Thread... threads) {
887	>	try {
888	>	// No need to optimize the failing case via Thread.join.
889	>	delay(millis);
890	>	for (Thread thread : threads)
891	>	assertTrue(thread.isAlive());
892	>	} catch (InterruptedException fail) {
893	>	threadFail("Unexpected InterruptedException");
894	>	}
895	>	}
896	>
897	>	/**
898	>	* Checks that future.get times out, with the default timeout of
899	>	* {@code timeoutMillis()}.
900	>	*/
901	>	void assertFutureTimesOut(Future future) {
902	>	assertFutureTimesOut(future, timeoutMillis());
903	>	}
904	>
905	>	/**
906	>	* Checks that future.get times out, with the given millisecond timeout.
907	>	*/
908	>	void assertFutureTimesOut(Future future, long timeoutMillis) {
909	>	long startTime = System.nanoTime();
910	>	try {
911	>	future.get(timeoutMillis, MILLISECONDS);
912	>	shouldThrow();
913	>	} catch (TimeoutException success) {
914	>	} catch (Exception fail) {
915	>	threadUnexpectedException(fail);
916	>	} finally { future.cancel(true); }
917	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
918	>	}
919	>
920	>	/**
921	>	* Fails with message "should throw exception".
922	>	*/
923		public void shouldThrow() {
924		fail("Should throw exception");
925		}
926
927		/**
928	<	* fail with message "Unexpected exception"
928	>	* Fails with message "should throw " + exceptionName.
929		*/
930	<	public void unexpectedException() {
931	<	fail("Unexpected exception");
930	>	public void shouldThrow(String exceptionName) {
931	>	fail("Should throw " + exceptionName);
932		}
933
299	–
934		/**
935		* The number of elements to place in collections, arrays, etc.
936		*/
937	<	static final int SIZE = 20;
937	>	public static final int SIZE = 20;
938
939		// Some convenient Integer constants
940
941	<	static final Integer zero = new Integer(0);
942	<	static final Integer one = new Integer(1);
943	<	static final Integer two = new Integer(2);
944	<	static final Integer three  = new Integer(3);
945	<	static final Integer four  = new Integer(4);
946	<	static final Integer five  = new Integer(5);
947	<	static final Integer six = new Integer(6);
948	<	static final Integer seven = new Integer(7);
949	<	static final Integer eight = new Integer(8);
950	<	static final Integer nine = new Integer(9);
951	<	static final Integer m1  = new Integer(-1);
952	<	static final Integer m2  = new Integer(-2);
953	<	static final Integer m3  = new Integer(-3);
954	<	static final Integer m4 = new Integer(-4);
955	<	static final Integer m5 = new Integer(-5);
956	<	static final Integer m10 = new Integer(-10);
941	>	public static final Integer zero  = new Integer(0);
942	>	public static final Integer one   = new Integer(1);
943	>	public static final Integer two   = new Integer(2);
944	>	public static final Integer three = new Integer(3);
945	>	public static final Integer four  = new Integer(4);
946	>	public static final Integer five  = new Integer(5);
947	>	public static final Integer six   = new Integer(6);
948	>	public static final Integer seven = new Integer(7);
949	>	public static final Integer eight = new Integer(8);
950	>	public static final Integer nine  = new Integer(9);
951	>	public static final Integer m1  = new Integer(-1);
952	>	public static final Integer m2  = new Integer(-2);
953	>	public static final Integer m3  = new Integer(-3);
954	>	public static final Integer m4  = new Integer(-4);
955	>	public static final Integer m5  = new Integer(-5);
956	>	public static final Integer m6  = new Integer(-6);
957	>	public static final Integer m10 = new Integer(-10);
958	>
959	>	/**
960	>	* Runs Runnable r with a security policy that permits precisely
961	>	* the specified permissions.  If there is no current security
962	>	* manager, the runnable is run twice, both with and without a
963	>	* security manager.  We require that any security manager permit
964	>	* getPolicy/setPolicy.
965	>	*/
966	>	public void runWithPermissions(Runnable r, Permission... permissions) {
967	>	SecurityManager sm = System.getSecurityManager();
968	>	if (sm == null) {
969	>	r.run();
970	>	}
971	>	runWithSecurityManagerWithPermissions(r, permissions);
972	>	}
973
974	+	/**
975	+	* Runs Runnable r with a security policy that permits precisely
976	+	* the specified permissions.  If there is no current security
977	+	* manager, a temporary one is set for the duration of the
978	+	* Runnable.  We require that any security manager permit
979	+	* getPolicy/setPolicy.
980	+	*/
981	+	public void runWithSecurityManagerWithPermissions(Runnable r,
982	+	Permission... permissions) {
983	+	SecurityManager sm = System.getSecurityManager();
984	+	if (sm == null) {
985	+	Policy savedPolicy = Policy.getPolicy();
986	+	try {
987	+	Policy.setPolicy(permissivePolicy());
988	+	System.setSecurityManager(new SecurityManager());
989	+	runWithSecurityManagerWithPermissions(r, permissions);
990	+	} finally {
991	+	System.setSecurityManager(null);
992	+	Policy.setPolicy(savedPolicy);
993	+	}
994	+	} else {
995	+	Policy savedPolicy = Policy.getPolicy();
996	+	AdjustablePolicy policy = new AdjustablePolicy(permissions);
997	+	Policy.setPolicy(policy);
998	+
999	+	try {
1000	+	r.run();
1001	+	} finally {
1002	+	policy.addPermission(new SecurityPermission("setPolicy"));
1003	+	Policy.setPolicy(savedPolicy);
1004	+	}
1005	+	}
1006	+	}
1007	+
1008	+	/**
1009	+	* Runs a runnable without any permissions.
1010	+	*/
1011	+	public void runWithoutPermissions(Runnable r) {
1012	+	runWithPermissions(r);
1013	+	}
1014
1015		/**
1016		* A security policy where new permissions can be dynamically added
1017		* or all cleared.
1018		*/
1019	<	static class AdjustablePolicy extends java.security.Policy {
1019	>	public static class AdjustablePolicy extends java.security.Policy {
1020		Permissions perms = new Permissions();
1021	<	AdjustablePolicy() { }
1021	>	AdjustablePolicy(Permission... permissions) {
1022	>	for (Permission permission : permissions)
1023	>	perms.add(permission);
1024	>	}
1025		void addPermission(Permission perm) { perms.add(perm); }
1026		void clearPermissions() { perms = new Permissions(); }
1027	<	public PermissionCollection getPermissions(CodeSource cs) {
1028	<	return perms;
1029	<	}
1030	<	public PermissionCollection getPermissions(ProtectionDomain pd) {
1031	<	return perms;
1032	<	}
1033	<	public boolean implies(ProtectionDomain pd, Permission p) {
1034	<	return perms.implies(p);
1035	<	}
1036	<	public void refresh() {}
1027	>	public PermissionCollection getPermissions(CodeSource cs) {
1028	>	return perms;
1029	>	}
1030	>	public PermissionCollection getPermissions(ProtectionDomain pd) {
1031	>	return perms;
1032	>	}
1033	>	public boolean implies(ProtectionDomain pd, Permission p) {
1034	>	return perms.implies(p);
1035	>	}
1036	>	public void refresh() {}
1037	>	public String toString() {
1038	>	List<Permission> ps = new ArrayList<Permission>();
1039	>	for (Enumeration<Permission> e = perms.elements(); e.hasMoreElements();)
1040	>	ps.add(e.nextElement());
1041	>	return "AdjustablePolicy with permissions " + ps;
1042	>	}
1043		}
1044
1045	+	/**
1046	+	* Returns a policy containing all the permissions we ever need.
1047	+	*/
1048	+	public static Policy permissivePolicy() {
1049	+	return new AdjustablePolicy
1050	+	// Permissions j.u.c. needs directly
1051	+	(new RuntimePermission("modifyThread"),
1052	+	new RuntimePermission("getClassLoader"),
1053	+	new RuntimePermission("setContextClassLoader"),
1054	+	// Permissions needed to change permissions!
1055	+	new SecurityPermission("getPolicy"),
1056	+	new SecurityPermission("setPolicy"),
1057	+	new RuntimePermission("setSecurityManager"),
1058	+	// Permissions needed by the junit test harness
1059	+	new RuntimePermission("accessDeclaredMembers"),
1060	+	new PropertyPermission("*", "read"),
1061	+	new java.io.FilePermission("<<ALL FILES>>", "read"));
1062	+	}
1063
1064	<	// Some convenient Runnable classes
1064	>	/**
1065	>	* Sleeps until the given time has elapsed.
1066	>	* Throws AssertionFailedError if interrupted.
1067	>	*/
1068	>	void sleep(long millis) {
1069	>	try {
1070	>	delay(millis);
1071	>	} catch (InterruptedException fail) {
1072	>	AssertionFailedError afe =
1073	>	new AssertionFailedError("Unexpected InterruptedException");
1074	>	afe.initCause(fail);
1075	>	throw afe;
1076	>	}
1077	>	}
1078
1079	<	static class NoOpRunnable implements Runnable {
1080	<	public void run() {}
1079	>	/**
1080	>	* Spin-waits up to the specified number of milliseconds for the given
1081	>	* thread to enter a wait state: BLOCKED, WAITING, or TIMED_WAITING.
1082	>	*/
1083	>	void waitForThreadToEnterWaitState(Thread thread, long timeoutMillis) {
1084	>	long startTime = System.nanoTime();
1085	>	for (;;) {
1086	>	Thread.State s = thread.getState();
1087	>	if (s == Thread.State.BLOCKED ||
1088	>	s == Thread.State.WAITING ||
1089	>	s == Thread.State.TIMED_WAITING)
1090	>	return;
1091	>	else if (s == Thread.State.TERMINATED)
1092	>	fail("Unexpected thread termination");
1093	>	else if (millisElapsedSince(startTime) > timeoutMillis) {
1094	>	threadAssertTrue(thread.isAlive());
1095	>	return;
1096	>	}
1097	>	Thread.yield();
1098	>	}
1099		}
1100
1101	<	static class NoOpCallable implements Callable {
1102	<	public Object call() { return Boolean.TRUE; }
1101	>	/**
1102	>	* Waits up to LONG_DELAY_MS for the given thread to enter a wait
1103	>	* state: BLOCKED, WAITING, or TIMED_WAITING.
1104	>	*/
1105	>	void waitForThreadToEnterWaitState(Thread thread) {
1106	>	waitForThreadToEnterWaitState(thread, LONG_DELAY_MS);
1107		}
1108
1109	<	class ShortRunnable implements Runnable {
1110	<	public void run() {
1111	<	try {
1112	<	Thread.sleep(SHORT_DELAY_MS);
1113	<	}
1114	<	catch(Exception e) {
1115	<	threadUnexpectedException();
1109	>	/**
1110	>	* Returns the number of milliseconds since time given by
1111	>	* startNanoTime, which must have been previously returned from a
1112	>	* call to {@link System#nanoTime()}.
1113	>	*/
1114	>	static long millisElapsedSince(long startNanoTime) {
1115	>	return NANOSECONDS.toMillis(System.nanoTime() - startNanoTime);
1116	>	}
1117	>
1118	>	//     void assertTerminatesPromptly(long timeoutMillis, Runnable r) {
1119	>	//         long startTime = System.nanoTime();
1120	>	//         try {
1121	>	//             r.run();
1122	>	//         } catch (Throwable fail) { threadUnexpectedException(fail); }
1123	>	//         if (millisElapsedSince(startTime) > timeoutMillis/2)
1124	>	//             throw new AssertionFailedError("did not return promptly");
1125	>	//     }
1126	>
1127	>	//     void assertTerminatesPromptly(Runnable r) {
1128	>	//         assertTerminatesPromptly(LONG_DELAY_MS/2, r);
1129	>	//     }
1130	>
1131	>	/**
1132	>	* Checks that timed f.get() returns the expected value, and does not
1133	>	* wait for the timeout to elapse before returning.
1134	>	*/
1135	>	<T> void checkTimedGet(Future<T> f, T expectedValue, long timeoutMillis) {
1136	>	long startTime = System.nanoTime();
1137	>	try {
1138	>	assertEquals(expectedValue, f.get(timeoutMillis, MILLISECONDS));
1139	>	} catch (Throwable fail) { threadUnexpectedException(fail); }
1140	>	if (millisElapsedSince(startTime) > timeoutMillis/2)
1141	>	throw new AssertionFailedError("timed get did not return promptly");
1142	>	}
1143	>
1144	>	<T> void checkTimedGet(Future<T> f, T expectedValue) {
1145	>	checkTimedGet(f, expectedValue, LONG_DELAY_MS);
1146	>	}
1147	>
1148	>	/**
1149	>	* Returns a new started daemon Thread running the given runnable.
1150	>	*/
1151	>	Thread newStartedThread(Runnable runnable) {
1152	>	Thread t = new Thread(runnable);
1153	>	t.setDaemon(true);
1154	>	t.start();
1155	>	return t;
1156	>	}
1157	>
1158	>	/**
1159	>	* Waits for the specified time (in milliseconds) for the thread
1160	>	* to terminate (using {@link Thread#join(long)}), else interrupts
1161	>	* the thread (in the hope that it may terminate later) and fails.
1162	>	*/
1163	>	void awaitTermination(Thread t, long timeoutMillis) {
1164	>	try {
1165	>	t.join(timeoutMillis);
1166	>	} catch (InterruptedException fail) {
1167	>	threadUnexpectedException(fail);
1168	>	} finally {
1169	>	if (t.getState() != Thread.State.TERMINATED) {
1170	>	t.interrupt();
1171	>	fail("Test timed out");
1172		}
1173		}
1174		}
1175
1176	<	class ShortInterruptedRunnable implements Runnable {
1177	<	public void run() {
1176	>	/**
1177	>	* Waits for LONG_DELAY_MS milliseconds for the thread to
1178	>	* terminate (using {@link Thread#join(long)}), else interrupts
1179	>	* the thread (in the hope that it may terminate later) and fails.
1180	>	*/
1181	>	void awaitTermination(Thread t) {
1182	>	awaitTermination(t, LONG_DELAY_MS);
1183	>	}
1184	>
1185	>	// Some convenient Runnable classes
1186	>
1187	>	public abstract class CheckedRunnable implements Runnable {
1188	>	protected abstract void realRun() throws Throwable;
1189	>
1190	>	public final void run() {
1191		try {
1192	<	Thread.sleep(SHORT_DELAY_MS);
1193	<	threadShouldThrow();
1194	<	}
374	<	catch(InterruptedException success) {
1192	>	realRun();
1193	>	} catch (Throwable fail) {
1194	>	threadUnexpectedException(fail);
1195		}
1196		}
1197		}
1198
1199	<	class SmallRunnable implements Runnable {
1200	<	public void run() {
1199	>	public abstract class RunnableShouldThrow implements Runnable {
1200	>	protected abstract void realRun() throws Throwable;
1201	>
1202	>	final Class<?> exceptionClass;
1203	>
1204	>	<T extends Throwable> RunnableShouldThrow(Class<T> exceptionClass) {
1205	>	this.exceptionClass = exceptionClass;
1206	>	}
1207	>
1208	>	public final void run() {
1209		try {
1210	<	Thread.sleep(SMALL_DELAY_MS);
1211	<	}
1212	<	catch(Exception e) {
1213	<	threadUnexpectedException();
1210	>	realRun();
1211	>	threadShouldThrow(exceptionClass.getSimpleName());
1212	>	} catch (Throwable t) {
1213	>	if (! exceptionClass.isInstance(t))
1214	>	threadUnexpectedException(t);
1215		}
1216		}
1217		}
1218
1219	<	class SmallPossiblyInterruptedRunnable implements Runnable {
1220	<	public void run() {
1219	>	public abstract class ThreadShouldThrow extends Thread {
1220	>	protected abstract void realRun() throws Throwable;
1221	>
1222	>	final Class<?> exceptionClass;
1223	>
1224	>	<T extends Throwable> ThreadShouldThrow(Class<T> exceptionClass) {
1225	>	this.exceptionClass = exceptionClass;
1226	>	}
1227	>
1228	>	public final void run() {
1229		try {
1230	<	Thread.sleep(SMALL_DELAY_MS);
1231	<	}
1232	<	catch(Exception e) {
1230	>	realRun();
1231	>	threadShouldThrow(exceptionClass.getSimpleName());
1232	>	} catch (Throwable t) {
1233	>	if (! exceptionClass.isInstance(t))
1234	>	threadUnexpectedException(t);
1235		}
1236		}
1237		}
1238
1239	<	class SmallCallable implements Callable {
1240	<	public Object call() {
1239	>	public abstract class CheckedInterruptedRunnable implements Runnable {
1240	>	protected abstract void realRun() throws Throwable;
1241	>
1242	>	public final void run() {
1243		try {
1244	<	Thread.sleep(SMALL_DELAY_MS);
1245	<	}
1246	<	catch(Exception e) {
1247	<	threadUnexpectedException();
1244	>	realRun();
1245	>	threadShouldThrow("InterruptedException");
1246	>	} catch (InterruptedException success) {
1247	>	threadAssertFalse(Thread.interrupted());
1248	>	} catch (Throwable fail) {
1249	>	threadUnexpectedException(fail);
1250		}
408	–	return Boolean.TRUE;
1251		}
1252		}
1253
1254	<	class SmallInterruptedRunnable implements Runnable {
1255	<	public void run() {
1254	>	public abstract class CheckedCallable<T> implements Callable<T> {
1255	>	protected abstract T realCall() throws Throwable;
1256	>
1257	>	public final T call() {
1258		try {
1259	<	Thread.sleep(SMALL_DELAY_MS);
1260	<	threadShouldThrow();
1261	<	}
1262	<	catch(InterruptedException success) {
1259	>	return realCall();
1260	>	} catch (Throwable fail) {
1261	>	threadUnexpectedException(fail);
1262	>	return null;
1263		}
1264		}
1265		}
1266
1267	+	public abstract class CheckedInterruptedCallable<T>
1268	+	implements Callable<T> {
1269	+	protected abstract T realCall() throws Throwable;
1270
1271	<	class MediumRunnable implements Runnable {
425	<	public void run() {
1271	>	public final T call() {
1272		try {
1273	<	Thread.sleep(MEDIUM_DELAY_MS);
1274	<	}
1275	<	catch(Exception e) {
1276	<	threadUnexpectedException();
1273	>	T result = realCall();
1274	>	threadShouldThrow("InterruptedException");
1275	>	return result;
1276	>	} catch (InterruptedException success) {
1277	>	threadAssertFalse(Thread.interrupted());
1278	>	} catch (Throwable fail) {
1279	>	threadUnexpectedException(fail);
1280		}
1281	+	return null;
1282		}
1283		}
1284
1285	<	class MediumInterruptedRunnable implements Runnable {
1286	<	public void run() {
1285	>	public static class NoOpRunnable implements Runnable {
1286	>	public void run() {}
1287	>	}
1288	>
1289	>	public static class NoOpCallable implements Callable {
1290	>	public Object call() { return Boolean.TRUE; }
1291	>	}
1292	>
1293	>	public static final String TEST_STRING = "a test string";
1294	>
1295	>	public static class StringTask implements Callable<String> {
1296	>	final String value;
1297	>	public StringTask() { this(TEST_STRING); }
1298	>	public StringTask(String value) { this.value = value; }
1299	>	public String call() { return value; }
1300	>	}
1301	>
1302	>	public Callable<String> latchAwaitingStringTask(final CountDownLatch latch) {
1303	>	return new CheckedCallable<String>() {
1304	>	protected String realCall() {
1305	>	try {
1306	>	latch.await();
1307	>	} catch (InterruptedException quittingTime) {}
1308	>	return TEST_STRING;
1309	>	}};
1310	>	}
1311	>
1312	>	public Runnable countDowner(final CountDownLatch latch) {
1313	>	return new CheckedRunnable() {
1314	>	public void realRun() throws InterruptedException {
1315	>	latch.countDown();
1316	>	}};
1317	>	}
1318	>
1319	>	public Runnable awaiter(final CountDownLatch latch) {
1320	>	return new CheckedRunnable() {
1321	>	public void realRun() throws InterruptedException {
1322	>	await(latch);
1323	>	}};
1324	>	}
1325	>
1326	>	public void await(CountDownLatch latch) {
1327	>	try {
1328	>	assertTrue(latch.await(LONG_DELAY_MS, MILLISECONDS));
1329	>	} catch (Throwable fail) {
1330	>	threadUnexpectedException(fail);
1331	>	}
1332	>	}
1333	>
1334	>	public void await(Semaphore semaphore) {
1335	>	try {
1336	>	assertTrue(semaphore.tryAcquire(LONG_DELAY_MS, MILLISECONDS));
1337	>	} catch (Throwable fail) {
1338	>	threadUnexpectedException(fail);
1339	>	}
1340	>	}
1341	>
1342	>	//     /**
1343	>	//      * Spin-waits up to LONG_DELAY_MS until flag becomes true.
1344	>	//      */
1345	>	//     public void await(AtomicBoolean flag) {
1346	>	//         await(flag, LONG_DELAY_MS);
1347	>	//     }
1348	>
1349	>	//     /**
1350	>	//      * Spin-waits up to the specified timeout until flag becomes true.
1351	>	//      */
1352	>	//     public void await(AtomicBoolean flag, long timeoutMillis) {
1353	>	//         long startTime = System.nanoTime();
1354	>	//         while (!flag.get()) {
1355	>	//             if (millisElapsedSince(startTime) > timeoutMillis)
1356	>	//                 throw new AssertionFailedError("timed out");
1357	>	//             Thread.yield();
1358	>	//         }
1359	>	//     }
1360	>
1361	>	public static class NPETask implements Callable<String> {
1362	>	public String call() { throw new NullPointerException(); }
1363	>	}
1364	>
1365	>	public static class CallableOne implements Callable<Integer> {
1366	>	public Integer call() { return one; }
1367	>	}
1368	>
1369	>	public class ShortRunnable extends CheckedRunnable {
1370	>	protected void realRun() throws Throwable {
1371	>	delay(SHORT_DELAY_MS);
1372	>	}
1373	>	}
1374	>
1375	>	public class ShortInterruptedRunnable extends CheckedInterruptedRunnable {
1376	>	protected void realRun() throws InterruptedException {
1377	>	delay(SHORT_DELAY_MS);
1378	>	}
1379	>	}
1380	>
1381	>	public class SmallRunnable extends CheckedRunnable {
1382	>	protected void realRun() throws Throwable {
1383	>	delay(SMALL_DELAY_MS);
1384	>	}
1385	>	}
1386	>
1387	>	public class SmallPossiblyInterruptedRunnable extends CheckedRunnable {
1388	>	protected void realRun() {
1389		try {
1390	<	Thread.sleep(MEDIUM_DELAY_MS);
1391	<	threadShouldThrow();
440	<	}
441	<	catch(InterruptedException success) {
442	<	}
1390	>	delay(SMALL_DELAY_MS);
1391	>	} catch (InterruptedException ok) {}
1392		}
1393		}
1394
1395	<	class MediumPossiblyInterruptedRunnable implements Runnable {
1396	<	public void run() {
1395	>	public class SmallCallable extends CheckedCallable {
1396	>	protected Object realCall() throws InterruptedException {
1397	>	delay(SMALL_DELAY_MS);
1398	>	return Boolean.TRUE;
1399	>	}
1400	>	}
1401	>
1402	>	public class MediumRunnable extends CheckedRunnable {
1403	>	protected void realRun() throws Throwable {
1404	>	delay(MEDIUM_DELAY_MS);
1405	>	}
1406	>	}
1407	>
1408	>	public class MediumInterruptedRunnable extends CheckedInterruptedRunnable {
1409	>	protected void realRun() throws InterruptedException {
1410	>	delay(MEDIUM_DELAY_MS);
1411	>	}
1412	>	}
1413	>
1414	>	public Runnable possiblyInterruptedRunnable(final long timeoutMillis) {
1415	>	return new CheckedRunnable() {
1416	>	protected void realRun() {
1417	>	try {
1418	>	delay(timeoutMillis);
1419	>	} catch (InterruptedException ok) {}
1420	>	}};
1421	>	}
1422	>
1423	>	public class MediumPossiblyInterruptedRunnable extends CheckedRunnable {
1424	>	protected void realRun() {
1425		try {
1426	<	Thread.sleep(MEDIUM_DELAY_MS);
1427	<	}
1428	<	catch(InterruptedException success) {
1429	<	}
1426	>	delay(MEDIUM_DELAY_MS);
1427	>	} catch (InterruptedException ok) {}
1428	>	}
1429	>	}
1430	>
1431	>	public class LongPossiblyInterruptedRunnable extends CheckedRunnable {
1432	>	protected void realRun() {
1433	>	try {
1434	>	delay(LONG_DELAY_MS);
1435	>	} catch (InterruptedException ok) {}
1436		}
1437		}
1438
1439		/**
1440		* For use as ThreadFactory in constructors
1441		*/
1442	<	static class SimpleThreadFactory implements ThreadFactory{
1443	<	public Thread newThread(Runnable r){
1442	>	public static class SimpleThreadFactory implements ThreadFactory {
1443	>	public Thread newThread(Runnable r) {
1444		return new Thread(r);
1445	<	}
1445	>	}
1446	>	}
1447	>
1448	>	public interface TrackedRunnable extends Runnable {
1449	>	boolean isDone();
1450	>	}
1451	>
1452	>	public static TrackedRunnable trackedRunnable(final long timeoutMillis) {
1453	>	return new TrackedRunnable() {
1454	>	private volatile boolean done = false;
1455	>	public boolean isDone() { return done; }
1456	>	public void run() {
1457	>	try {
1458	>	delay(timeoutMillis);
1459	>	done = true;
1460	>	} catch (InterruptedException ok) {}
1461	>	}
1462	>	};
1463		}
1464
1465	<	static class TrackedShortRunnable implements Runnable {
1466	<	volatile boolean done = false;
1465	>	public static class TrackedShortRunnable implements Runnable {
1466	>	public volatile boolean done = false;
1467		public void run() {
1468		try {
1469	<	Thread.sleep(SMALL_DELAY_MS);
1469	>	delay(SHORT_DELAY_MS);
1470		done = true;
1471	<	} catch(Exception e){
472	<	}
1471	>	} catch (InterruptedException ok) {}
1472		}
1473		}
1474
1475	<	static class TrackedMediumRunnable implements Runnable {
1476	<	volatile boolean done = false;
1475	>	public static class TrackedSmallRunnable implements Runnable {
1476	>	public volatile boolean done = false;
1477		public void run() {
1478		try {
1479	<	Thread.sleep(MEDIUM_DELAY_MS);
1479	>	delay(SMALL_DELAY_MS);
1480		done = true;
1481	<	} catch(Exception e){
483	<	}
1481	>	} catch (InterruptedException ok) {}
1482		}
1483		}
1484
1485	<	static class TrackedLongRunnable implements Runnable {
1486	<	volatile boolean done = false;
1485	>	public static class TrackedMediumRunnable implements Runnable {
1486	>	public volatile boolean done = false;
1487		public void run() {
1488		try {
1489	<	Thread.sleep(LONG_DELAY_MS);
1489	>	delay(MEDIUM_DELAY_MS);
1490		done = true;
1491	<	} catch(Exception e){
1492	<	}
1491	>	} catch (InterruptedException ok) {}
1492	>	}
1493	>	}
1494	>
1495	>	public static class TrackedLongRunnable implements Runnable {
1496	>	public volatile boolean done = false;
1497	>	public void run() {
1498	>	try {
1499	>	delay(LONG_DELAY_MS);
1500	>	done = true;
1501	>	} catch (InterruptedException ok) {}
1502		}
1503		}
1504
1505	<	static class TrackedNoOpRunnable implements Runnable {
1506	<	volatile boolean done = false;
1505	>	public static class TrackedNoOpRunnable implements Runnable {
1506	>	public volatile boolean done = false;
1507		public void run() {
1508		done = true;
1509		}
1510		}
1511
1512	<	static class TrackedCallable implements Callable {
1513	<	volatile boolean done = false;
1512	>	public static class TrackedCallable implements Callable {
1513	>	public volatile boolean done = false;
1514		public Object call() {
1515		try {
1516	<	Thread.sleep(SMALL_DELAY_MS);
1516	>	delay(SMALL_DELAY_MS);
1517		done = true;
1518	<	} catch(Exception e){
512	<	}
1518	>	} catch (InterruptedException ok) {}
1519		return Boolean.TRUE;
1520		}
1521		}
1522
1523		/**
1524	+	* Analog of CheckedRunnable for RecursiveAction
1525	+	*/
1526	+	public abstract class CheckedRecursiveAction extends RecursiveAction {
1527	+	protected abstract void realCompute() throws Throwable;
1528	+
1529	+	@Override protected final void compute() {
1530	+	try {
1531	+	realCompute();
1532	+	} catch (Throwable fail) {
1533	+	threadUnexpectedException(fail);
1534	+	}
1535	+	}
1536	+	}
1537	+
1538	+	/**
1539	+	* Analog of CheckedCallable for RecursiveTask
1540	+	*/
1541	+	public abstract class CheckedRecursiveTask<T> extends RecursiveTask<T> {
1542	+	protected abstract T realCompute() throws Throwable;
1543	+
1544	+	@Override protected final T compute() {
1545	+	try {
1546	+	return realCompute();
1547	+	} catch (Throwable fail) {
1548	+	threadUnexpectedException(fail);
1549	+	return null;
1550	+	}
1551	+	}
1552	+	}
1553	+
1554	+	/**
1555		* For use as RejectedExecutionHandler in constructors
1556		*/
1557	<	static class NoOpREHandler implements RejectedExecutionHandler{
1558	<	public void rejectedExecution(Runnable r, ThreadPoolExecutor executor){}
1557	>	public static class NoOpREHandler implements RejectedExecutionHandler {
1558	>	public void rejectedExecution(Runnable r,
1559	>	ThreadPoolExecutor executor) {}
1560	>	}
1561	>
1562	>	/**
1563	>	* A CyclicBarrier that uses timed await and fails with
1564	>	* AssertionFailedErrors instead of throwing checked exceptions.
1565	>	*/
1566	>	public class CheckedBarrier extends CyclicBarrier {
1567	>	public CheckedBarrier(int parties) { super(parties); }
1568	>
1569	>	public int await() {
1570	>	try {
1571	>	return super.await(2 * LONG_DELAY_MS, MILLISECONDS);
1572	>	} catch (TimeoutException timedOut) {
1573	>	throw new AssertionFailedError("timed out");
1574	>	} catch (Exception fail) {
1575	>	AssertionFailedError afe =
1576	>	new AssertionFailedError("Unexpected exception: " + fail);
1577	>	afe.initCause(fail);
1578	>	throw afe;
1579	>	}
1580	>	}
1581	>	}
1582	>
1583	>	void checkEmpty(BlockingQueue q) {
1584	>	try {
1585	>	assertTrue(q.isEmpty());
1586	>	assertEquals(0, q.size());
1587	>	assertNull(q.peek());
1588	>	assertNull(q.poll());
1589	>	assertNull(q.poll(0, MILLISECONDS));
1590	>	assertEquals(q.toString(), "[]");
1591	>	assertTrue(Arrays.equals(q.toArray(), new Object[0]));
1592	>	assertFalse(q.iterator().hasNext());
1593	>	try {
1594	>	q.element();
1595	>	shouldThrow();
1596	>	} catch (NoSuchElementException success) {}
1597	>	try {
1598	>	q.iterator().next();
1599	>	shouldThrow();
1600	>	} catch (NoSuchElementException success) {}
1601	>	try {
1602	>	q.remove();
1603	>	shouldThrow();
1604	>	} catch (NoSuchElementException success) {}
1605	>	} catch (InterruptedException fail) { threadUnexpectedException(fail); }
1606	>	}
1607	>
1608	>	void assertSerialEquals(Object x, Object y) {
1609	>	assertTrue(Arrays.equals(serialBytes(x), serialBytes(y)));
1610	>	}
1611	>
1612	>	void assertNotSerialEquals(Object x, Object y) {
1613	>	assertFalse(Arrays.equals(serialBytes(x), serialBytes(y)));
1614	>	}
1615	>
1616	>	byte[] serialBytes(Object o) {
1617	>	try {
1618	>	ByteArrayOutputStream bos = new ByteArrayOutputStream();
1619	>	ObjectOutputStream oos = new ObjectOutputStream(bos);
1620	>	oos.writeObject(o);
1621	>	oos.flush();
1622	>	oos.close();
1623	>	return bos.toByteArray();
1624	>	} catch (Throwable fail) {
1625	>	threadUnexpectedException(fail);
1626	>	return new byte[0];
1627	>	}
1628	>	}
1629	>
1630	>	@SuppressWarnings("unchecked")
1631	>	<T> T serialClone(T o) {
1632	>	try {
1633	>	ObjectInputStream ois = new ObjectInputStream
1634	>	(new ByteArrayInputStream(serialBytes(o)));
1635	>	T clone = (T) ois.readObject();
1636	>	assertSame(o.getClass(), clone.getClass());
1637	>	return clone;
1638	>	} catch (Throwable fail) {
1639	>	threadUnexpectedException(fail);
1640	>	return null;
1641	>	}
1642	>	}
1643	>
1644	>	public void assertThrows(Class<? extends Throwable> expectedExceptionClass,
1645	>	Runnable... throwingActions) {
1646	>	for (Runnable throwingAction : throwingActions) {
1647	>	boolean threw = false;
1648	>	try { throwingAction.run(); }
1649	>	catch (Throwable t) {
1650	>	threw = true;
1651	>	if (!expectedExceptionClass.isInstance(t)) {
1652	>	AssertionFailedError afe =
1653	>	new AssertionFailedError
1654	>	("Expected " + expectedExceptionClass.getName() +
1655	>	", got " + t.getClass().getName());
1656	>	afe.initCause(t);
1657	>	threadUnexpectedException(afe);
1658	>	}
1659	>	}
1660	>	if (!threw)
1661	>	shouldThrow(expectedExceptionClass.getName());
1662	>	}
1663	>	}
1664	>
1665	>	public void assertIteratorExhausted(Iterator<?> it) {
1666	>	try {
1667	>	it.next();
1668	>	shouldThrow();
1669	>	} catch (NoSuchElementException success) {}
1670	>	assertFalse(it.hasNext());
1671		}
523	–
524	–
1672		}

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