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

Comparing jsr166/src/test/tck/JSR166TestCase.java (file contents):
Revision 1.38 by jsr166, Wed Aug 5 00:43:59 2009 UTC vs.
Revision 1.204 by jsr166, Sat Oct 15 18:51:12 2016 UTC

#	Line 1 | Line 1
1		/*
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/licenses/publicdomain
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.*;
9	>	/*
10	>	* @test
11	>	* @summary JSR-166 tck tests
12	>	* @modules java.management
13	>	* @build *
14	>	* @run junit/othervm/timeout=1000 -Djsr166.testImplementationDetails=true JSR166TestCase
15	>	* @run junit/othervm/timeout=1000 -Djava.util.concurrent.ForkJoinPool.common.parallelism=0 -Djsr166.testImplementationDetails=true JSR166TestCase
16	>	* @run junit/othervm/timeout=1000 -Djava.util.concurrent.ForkJoinPool.common.parallelism=1 -Djava.util.secureRandomSeed=true JSR166TestCase
17	>	*/
18	>
19		import static java.util.concurrent.TimeUnit.MILLISECONDS;
20	<	import java.io.*;
21	<	import java.security.*;
20	>	import static java.util.concurrent.TimeUnit.MINUTES;
21	>	import static java.util.concurrent.TimeUnit.NANOSECONDS;
22	>
23	>	import java.io.ByteArrayInputStream;
24	>	import java.io.ByteArrayOutputStream;
25	>	import java.io.ObjectInputStream;
26	>	import java.io.ObjectOutputStream;
27	>	import java.lang.management.ManagementFactory;
28	>	import java.lang.management.ThreadInfo;
29	>	import java.lang.management.ThreadMXBean;
30	>	import java.lang.reflect.Constructor;
31	>	import java.lang.reflect.Method;
32	>	import java.lang.reflect.Modifier;
33	>	import java.nio.file.Files;
34	>	import java.nio.file.Paths;
35	>	import java.security.CodeSource;
36	>	import java.security.Permission;
37	>	import java.security.PermissionCollection;
38	>	import java.security.Permissions;
39	>	import java.security.Policy;
40	>	import java.security.ProtectionDomain;
41	>	import java.security.SecurityPermission;
42	>	import java.util.ArrayList;
43	>	import java.util.Arrays;
44	>	import java.util.Collections;
45	>	import java.util.Date;
46	>	import java.util.Enumeration;
47	>	import java.util.Iterator;
48	>	import java.util.List;
49	>	import java.util.NoSuchElementException;
50	>	import java.util.PropertyPermission;
51	>	import java.util.concurrent.BlockingQueue;
52	>	import java.util.concurrent.Callable;
53	>	import java.util.concurrent.CountDownLatch;
54	>	import java.util.concurrent.CyclicBarrier;
55	>	import java.util.concurrent.ExecutionException;
56	>	import java.util.concurrent.Executors;
57	>	import java.util.concurrent.ExecutorService;
58	>	import java.util.concurrent.ForkJoinPool;
59	>	import java.util.concurrent.Future;
60	>	import java.util.concurrent.RecursiveAction;
61	>	import java.util.concurrent.RecursiveTask;
62	>	import java.util.concurrent.RejectedExecutionHandler;
63	>	import java.util.concurrent.Semaphore;
64	>	import java.util.concurrent.SynchronousQueue;
65	>	import java.util.concurrent.ThreadFactory;
66	>	import java.util.concurrent.ThreadLocalRandom;
67	>	import java.util.concurrent.ThreadPoolExecutor;
68	>	import java.util.concurrent.TimeoutException;
69	>	import java.util.concurrent.atomic.AtomicBoolean;
70	>	import java.util.concurrent.atomic.AtomicReference;
71	>	import java.util.regex.Matcher;
72	>	import java.util.regex.Pattern;
73	>
74	>	import junit.framework.AssertionFailedError;
75	>	import junit.framework.Test;
76	>	import junit.framework.TestCase;
77	>	import junit.framework.TestResult;
78	>	import junit.framework.TestSuite;
79
80		/**
81		* Base class for JSR166 Junit TCK tests.  Defines some constants,
#	Line 23 | Line 87 | import java.security.*;
87		*
88		* <ol>
89		*
90	<	* <li> All assertions in code running in generated threads must use
90	>	* <li>All assertions in code running in generated threads must use
91		* the forms {@link #threadFail}, {@link #threadAssertTrue}, {@link
92		* #threadAssertEquals}, or {@link #threadAssertNull}, (not
93	<	* <tt>fail</tt>, <tt>assertTrue</tt>, etc.) It is OK (but not
93	>	* {@code fail}, {@code assertTrue}, etc.) It is OK (but not
94		* particularly recommended) for other code to use these forms too.
95		* Only the most typically used JUnit assertion methods are defined
96	<	* this way, but enough to live with.</li>
96	>	* this way, but enough to live with.
97		*
98	<	* <li> If you override {@link #setUp} or {@link #tearDown}, make sure
99	<	* to invoke <tt>super.setUp</tt> and <tt>super.tearDown</tt> within
98	>	* <li>If you override {@link #setUp} or {@link #tearDown}, make sure
99	>	* to invoke {@code super.setUp} and {@code super.tearDown} within
100		* them. These methods are used to clear and check for thread
101	<	* assertion failures.</li>
101	>	* assertion failures.
102		*
103	<	* <li>All delays and timeouts must use one of the constants <tt>
104	<	* SHORT_DELAY_MS</tt>, <tt> SMALL_DELAY_MS</tt>, <tt> MEDIUM_DELAY_MS</tt>,
105	<	* <tt> LONG_DELAY_MS</tt>. The idea here is that a SHORT is always
103	>	* <li>All delays and timeouts must use one of the constants {@code
104	>	* SHORT_DELAY_MS}, {@code SMALL_DELAY_MS}, {@code MEDIUM_DELAY_MS},
105	>	* {@code LONG_DELAY_MS}. The idea here is that a SHORT is always
106		* discriminable from zero time, and always allows enough time for the
107		* small amounts of computation (creating a thread, calling a few
108		* methods, etc) needed to reach a timeout point. Similarly, a SMALL
109		* is always discriminable as larger than SHORT and smaller than
110		* MEDIUM.  And so on. These constants are set to conservative values,
111		* but even so, if there is ever any doubt, they can all be increased
112	<	* in one spot to rerun tests on slower platforms.</li>
112	>	* in one spot to rerun tests on slower platforms.
113		*
114	<	* <li> All threads generated must be joined inside each test case
115	<	* method (or <tt>fail</tt> to do so) before returning from the
116	<	* method. The <tt> joinPool</tt> method can be used to do this when
117	<	* using Executors.</li>
114	>	* <li>All threads generated must be joined inside each test case
115	>	* method (or {@code fail} to do so) before returning from the
116	>	* method. The {@code joinPool} method can be used to do this when
117	>	* using Executors.
118		*
119		* </ol>
120		*
121	<	* <p> <b>Other notes</b>
121	>	* <p><b>Other notes</b>
122		* <ul>
123		*
124	<	* <li> Usually, there is one testcase method per JSR166 method
124	>	* <li>Usually, there is one testcase method per JSR166 method
125		* covering "normal" operation, and then as many exception-testing
126		* methods as there are exceptions the method can throw. Sometimes
127		* there are multiple tests per JSR166 method when the different
128		* "normal" behaviors differ significantly. And sometimes testcases
129	<	* cover multiple methods when they cannot be tested in
66	<	* isolation.</li>
129	>	* cover multiple methods when they cannot be tested in isolation.
130		*
131	<	* <li> The documentation style for testcases is to provide as javadoc
131	>	* <li>The documentation style for testcases is to provide as javadoc
132		* a simple sentence or two describing the property that the testcase
133		* method purports to test. The javadocs do not say anything about how
134	<	* the property is tested. To find out, read the code.</li>
134	>	* the property is tested. To find out, read the code.
135		*
136	<	* <li> These tests are "conformance tests", and do not attempt to
136	>	* <li>These tests are "conformance tests", and do not attempt to
137		* test throughput, latency, scalability or other performance factors
138		* (see the separate "jtreg" tests for a set intended to check these
139		* for the most central aspects of functionality.) So, most tests use
140		* the smallest sensible numbers of threads, collection sizes, etc
141	<	* needed to check basic conformance.</li>
141	>	* needed to check basic conformance.
142		*
143		* <li>The test classes currently do not declare inclusion in
144		* any particular package to simplify things for people integrating
145	<	* them in TCK test suites.</li>
145	>	* them in TCK test suites.
146		*
147	<	* <li> As a convenience, the <tt>main</tt> of this class (JSR166TestCase)
148	<	* runs all JSR166 unit tests.</li>
147	>	* <li>As a convenience, the {@code main} of this class (JSR166TestCase)
148	>	* runs all JSR166 unit tests.
149		*
150		* </ul>
151		*/
152		public class JSR166TestCase extends TestCase {
153	+	private static final boolean useSecurityManager =
154	+	Boolean.getBoolean("jsr166.useSecurityManager");
155	+
156	+	protected static final boolean expensiveTests =
157	+	Boolean.getBoolean("jsr166.expensiveTests");
158	+
159		/**
160	<	* Runs all JSR166 unit tests using junit.textui.TestRunner
160	>	* If true, also run tests that are not part of the official tck
161	>	* because they test unspecified implementation details.
162		*/
163	<	public static void main (String[] args) {
164	<	int iters = 1;
165	<	if (args.length > 0)
166	<	iters = Integer.parseInt(args[0]);
167	<	Test s = suite();
168	<	for (int i = 0; i < iters; ++i) {
169	<	junit.textui.TestRunner.run (s);
170	<	System.gc();
171	<	System.runFinalization();
163	>	protected static final boolean testImplementationDetails =
164	>	Boolean.getBoolean("jsr166.testImplementationDetails");
165	>
166	>	/**
167	>	* If true, report on stdout all "slow" tests, that is, ones that
168	>	* take more than profileThreshold milliseconds to execute.
169	>	*/
170	>	private static final boolean profileTests =
171	>	Boolean.getBoolean("jsr166.profileTests");
172	>
173	>	/**
174	>	* The number of milliseconds that tests are permitted for
175	>	* execution without being reported, when profileTests is set.
176	>	*/
177	>	private static final long profileThreshold =
178	>	Long.getLong("jsr166.profileThreshold", 100);
179	>
180	>	/**
181	>	* The number of repetitions per test (for tickling rare bugs).
182	>	*/
183	>	private static final int runsPerTest =
184	>	Integer.getInteger("jsr166.runsPerTest", 1);
185	>
186	>	/**
187	>	* The number of repetitions of the test suite (for finding leaks?).
188	>	*/
189	>	private static final int suiteRuns =
190	>	Integer.getInteger("jsr166.suiteRuns", 1);
191	>
192	>	/**
193	>	* Returns the value of the system property, or NaN if not defined.
194	>	*/
195	>	private static float systemPropertyValue(String name) {
196	>	String floatString = System.getProperty(name);
197	>	if (floatString == null)
198	>	return Float.NaN;
199	>	try {
200	>	return Float.parseFloat(floatString);
201	>	} catch (NumberFormatException ex) {
202	>	throw new IllegalArgumentException(
203	>	String.format("Bad float value in system property %s=%s",
204	>	name, floatString));
205	>	}
206	>	}
207	>
208	>	/**
209	>	* The scaling factor to apply to standard delays used in tests.
210	>	* May be initialized from any of:
211	>	* - the "jsr166.delay.factor" system property
212	>	* - the "test.timeout.factor" system property (as used by jtreg)
213	>	*   See: http://openjdk.java.net/jtreg/tag-spec.html
214	>	* - hard-coded fuzz factor when using a known slowpoke VM
215	>	*/
216	>	private static final float delayFactor = delayFactor();
217	>
218	>	private static float delayFactor() {
219	>	float x;
220	>	if (!Float.isNaN(x = systemPropertyValue("jsr166.delay.factor")))
221	>	return x;
222	>	if (!Float.isNaN(x = systemPropertyValue("test.timeout.factor")))
223	>	return x;
224	>	String prop = System.getProperty("java.vm.version");
225	>	if (prop != null && prop.matches(".*debug.*"))
226	>	return 4.0f; // How much slower is fastdebug than product?!
227	>	return 1.0f;
228	>	}
229	>
230	>	public JSR166TestCase() { super(); }
231	>	public JSR166TestCase(String name) { super(name); }
232	>
233	>	/**
234	>	* A filter for tests to run, matching strings of the form
235	>	* methodName(className), e.g. "testInvokeAll5(ForkJoinPoolTest)"
236	>	* Usefully combined with jsr166.runsPerTest.
237	>	*/
238	>	private static final Pattern methodFilter = methodFilter();
239	>
240	>	private static Pattern methodFilter() {
241	>	String regex = System.getProperty("jsr166.methodFilter");
242	>	return (regex == null) ? null : Pattern.compile(regex);
243	>	}
244	>
245	>	// Instrumentation to debug very rare, but very annoying hung test runs.
246	>	static volatile TestCase currentTestCase;
247	>	// static volatile int currentRun = 0;
248	>	static {
249	>	Runnable checkForWedgedTest = new Runnable() { public void run() {
250	>	// Avoid spurious reports with enormous runsPerTest.
251	>	// A single test case run should never take more than 1 second.
252	>	// But let's cap it at the high end too ...
253	>	final int timeoutMinutes =
254	>	Math.min(15, Math.max(runsPerTest / 60, 1));
255	>	for (TestCase lastTestCase = currentTestCase;;) {
256	>	try { MINUTES.sleep(timeoutMinutes); }
257	>	catch (InterruptedException unexpected) { break; }
258	>	if (lastTestCase == currentTestCase) {
259	>	System.err.printf(
260	>	"Looks like we're stuck running test: %s%n",
261	>	lastTestCase);
262	>	//                     System.err.printf(
263	>	//                         "Looks like we're stuck running test: %s (%d/%d)%n",
264	>	//                         lastTestCase, currentRun, runsPerTest);
265	>	//                     System.err.println("availableProcessors=" +
266	>	//                         Runtime.getRuntime().availableProcessors());
267	>	//                     System.err.printf("cpu model = %s%n", cpuModel());
268	>	dumpTestThreads();
269	>	// one stack dump is probably enough; more would be spam
270	>	break;
271	>	}
272	>	lastTestCase = currentTestCase;
273	>	}}};
274	>	Thread thread = new Thread(checkForWedgedTest, "checkForWedgedTest");
275	>	thread.setDaemon(true);
276	>	thread.start();
277	>	}
278	>
279	>	//     public static String cpuModel() {
280	>	//         try {
281	>	//             Matcher matcher = Pattern.compile("model name\\s*: (.*)")
282	>	//                 .matcher(new String(
283	>	//                      Files.readAllBytes(Paths.get("/proc/cpuinfo")), "UTF-8"));
284	>	//             matcher.find();
285	>	//             return matcher.group(1);
286	>	//         } catch (Exception ex) { return null; }
287	>	//     }
288	>
289	>	public void runBare() throws Throwable {
290	>	currentTestCase = this;
291	>	if (methodFilter == null
292	>	|| methodFilter.matcher(toString()).find())
293	>	super.runBare();
294	>	}
295	>
296	>	protected void runTest() throws Throwable {
297	>	for (int i = 0; i < runsPerTest; i++) {
298	>	// currentRun = i;
299	>	if (profileTests)
300	>	runTestProfiled();
301	>	else
302	>	super.runTest();
303	>	}
304	>	}
305	>
306	>	protected void runTestProfiled() throws Throwable {
307	>	for (int i = 0; i < 2; i++) {
308	>	long startTime = System.nanoTime();
309	>	super.runTest();
310	>	long elapsedMillis = millisElapsedSince(startTime);
311	>	if (elapsedMillis < profileThreshold)
312	>	break;
313	>	// Never report first run of any test; treat it as a
314	>	// warmup run, notably to trigger all needed classloading,
315	>	if (i > 0)
316	>	System.out.printf("%n%s: %d%n", toString(), elapsedMillis);
317	>	}
318	>	}
319	>
320	>	/**
321	>	* Runs all JSR166 unit tests using junit.textui.TestRunner.
322	>	*/
323	>	public static void main(String[] args) {
324	>	main(suite(), args);
325	>	}
326	>
327	>	static class PithyResultPrinter extends junit.textui.ResultPrinter {
328	>	PithyResultPrinter(java.io.PrintStream writer) { super(writer); }
329	>	long runTime;
330	>	public void startTest(Test test) {}
331	>	protected void printHeader(long runTime) {
332	>	this.runTime = runTime; // defer printing for later
333	>	}
334	>	protected void printFooter(TestResult result) {
335	>	if (result.wasSuccessful()) {
336	>	getWriter().println("OK (" + result.runCount() + " tests)"
337	>	+ "  Time: " + elapsedTimeAsString(runTime));
338	>	} else {
339	>	getWriter().println("Time: " + elapsedTimeAsString(runTime));
340	>	super.printFooter(result);
341	>	}
342		}
103	–	System.exit(0);
343		}
344
345		/**
346	<	* Collects all JSR166 unit tests as one suite
346	>	* Returns a TestRunner that doesn't bother with unnecessary
347	>	* fluff, like printing a "." for each test case.
348		*/
349	<	public static Test suite ( ) {
350	<	TestSuite suite = new TestSuite("JSR166 Unit Tests");
349	>	static junit.textui.TestRunner newPithyTestRunner() {
350	>	junit.textui.TestRunner runner = new junit.textui.TestRunner();
351	>	runner.setPrinter(new PithyResultPrinter(System.out));
352	>	return runner;
353	>	}
354
355	<	suite.addTest(new TestSuite(ForkJoinPoolTest.class));
356	<	suite.addTest(new TestSuite(ForkJoinTaskTest.class));
357	<	suite.addTest(new TestSuite(RecursiveActionTest.class));
358	<	suite.addTest(new TestSuite(RecursiveTaskTest.class));
359	<	suite.addTest(new TestSuite(LinkedTransferQueueTest.class));
360	<	suite.addTest(new TestSuite(PhaserTest.class));
361	<	suite.addTest(new TestSuite(ThreadLocalRandomTest.class));
362	<	suite.addTest(new TestSuite(AbstractExecutorServiceTest.class));
363	<	suite.addTest(new TestSuite(AbstractQueueTest.class));
364	<	suite.addTest(new TestSuite(AbstractQueuedSynchronizerTest.class));
365	<	suite.addTest(new TestSuite(AbstractQueuedLongSynchronizerTest.class));
366	<	suite.addTest(new TestSuite(ArrayBlockingQueueTest.class));
367	<	suite.addTest(new TestSuite(ArrayDequeTest.class));
368	<	suite.addTest(new TestSuite(AtomicBooleanTest.class));
369	<	suite.addTest(new TestSuite(AtomicIntegerArrayTest.class));
370	<	suite.addTest(new TestSuite(AtomicIntegerFieldUpdaterTest.class));
371	<	suite.addTest(new TestSuite(AtomicIntegerTest.class));
372	<	suite.addTest(new TestSuite(AtomicLongArrayTest.class));
130	<	suite.addTest(new TestSuite(AtomicLongFieldUpdaterTest.class));
131	<	suite.addTest(new TestSuite(AtomicLongTest.class));
132	<	suite.addTest(new TestSuite(AtomicMarkableReferenceTest.class));
133	<	suite.addTest(new TestSuite(AtomicReferenceArrayTest.class));
134	<	suite.addTest(new TestSuite(AtomicReferenceFieldUpdaterTest.class));
135	<	suite.addTest(new TestSuite(AtomicReferenceTest.class));
136	<	suite.addTest(new TestSuite(AtomicStampedReferenceTest.class));
137	<	suite.addTest(new TestSuite(ConcurrentHashMapTest.class));
138	<	suite.addTest(new TestSuite(ConcurrentLinkedQueueTest.class));
139	<	suite.addTest(new TestSuite(ConcurrentSkipListMapTest.class));
140	<	suite.addTest(new TestSuite(ConcurrentSkipListSubMapTest.class));
141	<	suite.addTest(new TestSuite(ConcurrentSkipListSetTest.class));
142	<	suite.addTest(new TestSuite(ConcurrentSkipListSubSetTest.class));
143	<	suite.addTest(new TestSuite(CopyOnWriteArrayListTest.class));
144	<	suite.addTest(new TestSuite(CopyOnWriteArraySetTest.class));
145	<	suite.addTest(new TestSuite(CountDownLatchTest.class));
146	<	suite.addTest(new TestSuite(CyclicBarrierTest.class));
147	<	suite.addTest(new TestSuite(DelayQueueTest.class));
148	<	suite.addTest(new TestSuite(EntryTest.class));
149	<	suite.addTest(new TestSuite(ExchangerTest.class));
150	<	suite.addTest(new TestSuite(ExecutorsTest.class));
151	<	suite.addTest(new TestSuite(ExecutorCompletionServiceTest.class));
152	<	suite.addTest(new TestSuite(FutureTaskTest.class));
153	<	suite.addTest(new TestSuite(LinkedBlockingDequeTest.class));
154	<	suite.addTest(new TestSuite(LinkedBlockingQueueTest.class));
155	<	suite.addTest(new TestSuite(LinkedListTest.class));
156	<	suite.addTest(new TestSuite(LockSupportTest.class));
157	<	suite.addTest(new TestSuite(PriorityBlockingQueueTest.class));
158	<	suite.addTest(new TestSuite(PriorityQueueTest.class));
159	<	suite.addTest(new TestSuite(ReentrantLockTest.class));
160	<	suite.addTest(new TestSuite(ReentrantReadWriteLockTest.class));
161	<	suite.addTest(new TestSuite(ScheduledExecutorTest.class));
162	<	suite.addTest(new TestSuite(ScheduledExecutorSubclassTest.class));
163	<	suite.addTest(new TestSuite(SemaphoreTest.class));
164	<	suite.addTest(new TestSuite(SynchronousQueueTest.class));
165	<	suite.addTest(new TestSuite(SystemTest.class));
166	<	suite.addTest(new TestSuite(ThreadLocalTest.class));
167	<	suite.addTest(new TestSuite(ThreadPoolExecutorTest.class));
168	<	suite.addTest(new TestSuite(ThreadPoolExecutorSubclassTest.class));
169	<	suite.addTest(new TestSuite(ThreadTest.class));
170	<	suite.addTest(new TestSuite(TimeUnitTest.class));
171	<	suite.addTest(new TestSuite(TreeMapTest.class));
172	<	suite.addTest(new TestSuite(TreeSetTest.class));
173	<	suite.addTest(new TestSuite(TreeSubMapTest.class));
174	<	suite.addTest(new TestSuite(TreeSubSetTest.class));
355	>	/**
356	>	* Runs all unit tests in the given test suite.
357	>	* Actual behavior influenced by jsr166.* system properties.
358	>	*/
359	>	static void main(Test suite, String[] args) {
360	>	if (useSecurityManager) {
361	>	System.err.println("Setting a permissive security manager");
362	>	Policy.setPolicy(permissivePolicy());
363	>	System.setSecurityManager(new SecurityManager());
364	>	}
365	>	for (int i = 0; i < suiteRuns; i++) {
366	>	TestResult result = newPithyTestRunner().doRun(suite);
367	>	if (!result.wasSuccessful())
368	>	System.exit(1);
369	>	System.gc();
370	>	System.runFinalization();
371	>	}
372	>	}
373
374	+	public static TestSuite newTestSuite(Object... suiteOrClasses) {
375	+	TestSuite suite = new TestSuite();
376	+	for (Object suiteOrClass : suiteOrClasses) {
377	+	if (suiteOrClass instanceof TestSuite)
378	+	suite.addTest((TestSuite) suiteOrClass);
379	+	else if (suiteOrClass instanceof Class)
380	+	suite.addTest(new TestSuite((Class<?>) suiteOrClass));
381	+	else
382	+	throw new ClassCastException("not a test suite or class");
383	+	}
384		return suite;
385		}
386
387	+	public static void addNamedTestClasses(TestSuite suite,
388	+	String... testClassNames) {
389	+	for (String testClassName : testClassNames) {
390	+	try {
391	+	Class<?> testClass = Class.forName(testClassName);
392	+	Method m = testClass.getDeclaredMethod("suite",
393	+	new Class<?>[0]);
394	+	suite.addTest(newTestSuite((Test)m.invoke(null)));
395	+	} catch (Exception e) {
396	+	throw new Error("Missing test class", e);
397	+	}
398	+	}
399	+	}
400	+
401	+	public static final double JAVA_CLASS_VERSION;
402	+	public static final String JAVA_SPECIFICATION_VERSION;
403	+	static {
404	+	try {
405	+	JAVA_CLASS_VERSION = java.security.AccessController.doPrivileged(
406	+	new java.security.PrivilegedAction<Double>() {
407	+	public Double run() {
408	+	return Double.valueOf(System.getProperty("java.class.version"));}});
409	+	JAVA_SPECIFICATION_VERSION = java.security.AccessController.doPrivileged(
410	+	new java.security.PrivilegedAction<String>() {
411	+	public String run() {
412	+	return System.getProperty("java.specification.version");}});
413	+	} catch (Throwable t) {
414	+	throw new Error(t);
415	+	}
416	+	}
417	+
418	+	public static boolean atLeastJava6() { return JAVA_CLASS_VERSION >= 50.0; }
419	+	public static boolean atLeastJava7() { return JAVA_CLASS_VERSION >= 51.0; }
420	+	public static boolean atLeastJava8() { return JAVA_CLASS_VERSION >= 52.0; }
421	+	public static boolean atLeastJava9() {
422	+	return JAVA_CLASS_VERSION >= 53.0
423	+	// As of 2015-09, java9 still uses 52.0 class file version
424	+	|| JAVA_SPECIFICATION_VERSION.matches("^(1\\.)?(9|[0-9][0-9])$");
425	+	}
426	+	public static boolean atLeastJava10() {
427	+	return JAVA_CLASS_VERSION >= 54.0
428	+	|| JAVA_SPECIFICATION_VERSION.matches("^(1\\.)?[0-9][0-9]$");
429	+	}
430	+
431	+	/**
432	+	* Collects all JSR166 unit tests as one suite.
433	+	*/
434	+	public static Test suite() {
435	+	// Java7+ test classes
436	+	TestSuite suite = newTestSuite(
437	+	ForkJoinPoolTest.suite(),
438	+	ForkJoinTaskTest.suite(),
439	+	RecursiveActionTest.suite(),
440	+	RecursiveTaskTest.suite(),
441	+	LinkedTransferQueueTest.suite(),
442	+	PhaserTest.suite(),
443	+	ThreadLocalRandomTest.suite(),
444	+	AbstractExecutorServiceTest.suite(),
445	+	AbstractQueueTest.suite(),
446	+	AbstractQueuedSynchronizerTest.suite(),
447	+	AbstractQueuedLongSynchronizerTest.suite(),
448	+	ArrayBlockingQueueTest.suite(),
449	+	ArrayDequeTest.suite(),
450	+	AtomicBooleanTest.suite(),
451	+	AtomicIntegerArrayTest.suite(),
452	+	AtomicIntegerFieldUpdaterTest.suite(),
453	+	AtomicIntegerTest.suite(),
454	+	AtomicLongArrayTest.suite(),
455	+	AtomicLongFieldUpdaterTest.suite(),
456	+	AtomicLongTest.suite(),
457	+	AtomicMarkableReferenceTest.suite(),
458	+	AtomicReferenceArrayTest.suite(),
459	+	AtomicReferenceFieldUpdaterTest.suite(),
460	+	AtomicReferenceTest.suite(),
461	+	AtomicStampedReferenceTest.suite(),
462	+	ConcurrentHashMapTest.suite(),
463	+	ConcurrentLinkedDequeTest.suite(),
464	+	ConcurrentLinkedQueueTest.suite(),
465	+	ConcurrentSkipListMapTest.suite(),
466	+	ConcurrentSkipListSubMapTest.suite(),
467	+	ConcurrentSkipListSetTest.suite(),
468	+	ConcurrentSkipListSubSetTest.suite(),
469	+	CopyOnWriteArrayListTest.suite(),
470	+	CopyOnWriteArraySetTest.suite(),
471	+	CountDownLatchTest.suite(),
472	+	CountedCompleterTest.suite(),
473	+	CyclicBarrierTest.suite(),
474	+	DelayQueueTest.suite(),
475	+	EntryTest.suite(),
476	+	ExchangerTest.suite(),
477	+	ExecutorsTest.suite(),
478	+	ExecutorCompletionServiceTest.suite(),
479	+	FutureTaskTest.suite(),
480	+	LinkedBlockingDequeTest.suite(),
481	+	LinkedBlockingQueueTest.suite(),
482	+	LinkedListTest.suite(),
483	+	LockSupportTest.suite(),
484	+	PriorityBlockingQueueTest.suite(),
485	+	PriorityQueueTest.suite(),
486	+	ReentrantLockTest.suite(),
487	+	ReentrantReadWriteLockTest.suite(),
488	+	ScheduledExecutorTest.suite(),
489	+	ScheduledExecutorSubclassTest.suite(),
490	+	SemaphoreTest.suite(),
491	+	SynchronousQueueTest.suite(),
492	+	SystemTest.suite(),
493	+	ThreadLocalTest.suite(),
494	+	ThreadPoolExecutorTest.suite(),
495	+	ThreadPoolExecutorSubclassTest.suite(),
496	+	ThreadTest.suite(),
497	+	TimeUnitTest.suite(),
498	+	TreeMapTest.suite(),
499	+	TreeSetTest.suite(),
500	+	TreeSubMapTest.suite(),
501	+	TreeSubSetTest.suite());
502	+
503	+	// Java8+ test classes
504	+	if (atLeastJava8()) {
505	+	String[] java8TestClassNames = {
506	+	"Atomic8Test",
507	+	"CompletableFutureTest",
508	+	"ConcurrentHashMap8Test",
509	+	"CountedCompleter8Test",
510	+	"DoubleAccumulatorTest",
511	+	"DoubleAdderTest",
512	+	"ForkJoinPool8Test",
513	+	"ForkJoinTask8Test",
514	+	"LongAccumulatorTest",
515	+	"LongAdderTest",
516	+	"SplittableRandomTest",
517	+	"StampedLockTest",
518	+	"SubmissionPublisherTest",
519	+	"ThreadLocalRandom8Test",
520	+	"TimeUnit8Test",
521	+	};
522	+	addNamedTestClasses(suite, java8TestClassNames);
523	+	}
524	+
525	+	// Java9+ test classes
526	+	if (atLeastJava9()) {
527	+	String[] java9TestClassNames = {
528	+	"AtomicBoolean9Test",
529	+	"AtomicInteger9Test",
530	+	"AtomicIntegerArray9Test",
531	+	"AtomicLong9Test",
532	+	"AtomicLongArray9Test",
533	+	"AtomicReference9Test",
534	+	"AtomicReferenceArray9Test",
535	+	"ExecutorCompletionService9Test",
536	+	};
537	+	addNamedTestClasses(suite, java9TestClassNames);
538	+	}
539	+
540	+	return suite;
541	+	}
542	+
543	+	/** Returns list of junit-style test method names in given class. */
544	+	public static ArrayList<String> testMethodNames(Class<?> testClass) {
545	+	Method[] methods = testClass.getDeclaredMethods();
546	+	ArrayList<String> names = new ArrayList<String>(methods.length);
547	+	for (Method method : methods) {
548	+	if (method.getName().startsWith("test")
549	+	&& Modifier.isPublic(method.getModifiers())
550	+	// method.getParameterCount() requires jdk8+
551	+	&& method.getParameterTypes().length == 0) {
552	+	names.add(method.getName());
553	+	}
554	+	}
555	+	return names;
556	+	}
557	+
558	+	/**
559	+	* Returns junit-style testSuite for the given test class, but
560	+	* parameterized by passing extra data to each test.
561	+	*/
562	+	public static <ExtraData> Test parameterizedTestSuite
563	+	(Class<? extends JSR166TestCase> testClass,
564	+	Class<ExtraData> dataClass,
565	+	ExtraData data) {
566	+	try {
567	+	TestSuite suite = new TestSuite();
568	+	Constructor c =
569	+	testClass.getDeclaredConstructor(dataClass, String.class);
570	+	for (String methodName : testMethodNames(testClass))
571	+	suite.addTest((Test) c.newInstance(data, methodName));
572	+	return suite;
573	+	} catch (Exception e) {
574	+	throw new Error(e);
575	+	}
576	+	}
577	+
578	+	/**
579	+	* Returns junit-style testSuite for the jdk8 extension of the
580	+	* given test class, but parameterized by passing extra data to
581	+	* each test.  Uses reflection to allow compilation in jdk7.
582	+	*/
583	+	public static <ExtraData> Test jdk8ParameterizedTestSuite
584	+	(Class<? extends JSR166TestCase> testClass,
585	+	Class<ExtraData> dataClass,
586	+	ExtraData data) {
587	+	if (atLeastJava8()) {
588	+	String name = testClass.getName();
589	+	String name8 = name.replaceAll("Test$", "8Test");
590	+	if (name.equals(name8)) throw new Error(name);
591	+	try {
592	+	return (Test)
593	+	Class.forName(name8)
594	+	.getMethod("testSuite", new Class[] { dataClass })
595	+	.invoke(null, data);
596	+	} catch (Exception e) {
597	+	throw new Error(e);
598	+	}
599	+	} else {
600	+	return new TestSuite();
601	+	}
602	+	}
603	+
604	+	// Delays for timing-dependent tests, in milliseconds.
605
606		public static long SHORT_DELAY_MS;
607		public static long SMALL_DELAY_MS;
608		public static long MEDIUM_DELAY_MS;
609		public static long LONG_DELAY_MS;
610
185	–
611		/**
612	<	* Returns the shortest timed delay. This could
613	<	* be reimplemented to use for example a Property.
612	>	* Returns the shortest timed delay. This can be scaled up for
613	>	* slow machines using the jsr166.delay.factor system property,
614	>	* or via jtreg's -timeoutFactor: flag.
615	>	* http://openjdk.java.net/jtreg/command-help.html
616		*/
617		protected long getShortDelay() {
618	<	return 50;
618	>	return (long) (50 * delayFactor);
619		}
620
194	–
621		/**
622		* Sets delays as multiples of SHORT_DELAY.
623		*/
624	<	protected  void setDelays() {
624	>	protected void setDelays() {
625		SHORT_DELAY_MS = getShortDelay();
626	<	SMALL_DELAY_MS = SHORT_DELAY_MS * 5;
626	>	SMALL_DELAY_MS  = SHORT_DELAY_MS * 5;
627		MEDIUM_DELAY_MS = SHORT_DELAY_MS * 10;
628	<	LONG_DELAY_MS = SHORT_DELAY_MS * 50;
628	>	LONG_DELAY_MS   = SHORT_DELAY_MS * 200;
629		}
630
631		/**
632	<	* Flag set true if any threadAssert methods fail
632	>	* Returns a timeout in milliseconds to be used in tests that
633	>	* verify that operations block or time out.
634		*/
635	<	volatile boolean threadFailed;
635	>	long timeoutMillis() {
636	>	return SHORT_DELAY_MS / 4;
637	>	}
638
639		/**
640	<	* Initializes test to indicate that no thread assertions have failed
640	>	* Returns a new Date instance representing a time at least
641	>	* delayMillis milliseconds in the future.
642		*/
643	+	Date delayedDate(long delayMillis) {
644	+	// Add 1 because currentTimeMillis is known to round into the past.
645	+	return new Date(System.currentTimeMillis() + delayMillis + 1);
646	+	}
647	+
648	+	/**
649	+	* The first exception encountered if any threadAssertXXX method fails.
650	+	*/
651	+	private final AtomicReference<Throwable> threadFailure
652	+	= new AtomicReference<Throwable>(null);
653	+
654	+	/**
655	+	* Records an exception so that it can be rethrown later in the test
656	+	* harness thread, triggering a test case failure.  Only the first
657	+	* failure is recorded; subsequent calls to this method from within
658	+	* the same test have no effect.
659	+	*/
660	+	public void threadRecordFailure(Throwable t) {
661	+	System.err.println(t);
662	+	dumpTestThreads();
663	+	threadFailure.compareAndSet(null, t);
664	+	}
665	+
666		public void setUp() {
667		setDelays();
668	<	threadFailed = false;
668	>	}
669	>
670	>	void tearDownFail(String format, Object... args) {
671	>	String msg = toString() + ": " + String.format(format, args);
672	>	System.err.println(msg);
673	>	dumpTestThreads();
674	>	throw new AssertionFailedError(msg);
675	>	}
676	>
677	>	/**
678	>	* Extra checks that get done for all test cases.
679	>	*
680	>	* Triggers test case failure if any thread assertions have failed,
681	>	* by rethrowing, in the test harness thread, any exception recorded
682	>	* earlier by threadRecordFailure.
683	>	*
684	>	* Triggers test case failure if interrupt status is set in the main thread.
685	>	*/
686	>	public void tearDown() throws Exception {
687	>	Throwable t = threadFailure.getAndSet(null);
688	>	if (t != null) {
689	>	if (t instanceof Error)
690	>	throw (Error) t;
691	>	else if (t instanceof RuntimeException)
692	>	throw (RuntimeException) t;
693	>	else if (t instanceof Exception)
694	>	throw (Exception) t;
695	>	else {
696	>	AssertionFailedError afe =
697	>	new AssertionFailedError(t.toString());
698	>	afe.initCause(t);
699	>	throw afe;
700	>	}
701	>	}
702	>
703	>	if (Thread.interrupted())
704	>	tearDownFail("interrupt status set in main thread");
705	>
706	>	checkForkJoinPoolThreadLeaks();
707		}
708
709		/**
710	<	* Triggers test case failure if any thread assertions have failed
710	>	* Finds missing PoolCleaners
711		*/
712	<	public void tearDown() {
713	<	assertFalse(threadFailed);
712	>	void checkForkJoinPoolThreadLeaks() throws InterruptedException {
713	>	Thread[] survivors = new Thread[7];
714	>	int count = Thread.enumerate(survivors);
715	>	for (int i = 0; i < count; i++) {
716	>	Thread thread = survivors[i];
717	>	String name = thread.getName();
718	>	if (name.startsWith("ForkJoinPool-")) {
719	>	// give thread some time to terminate
720	>	thread.join(LONG_DELAY_MS);
721	>	if (thread.isAlive())
722	>	tearDownFail("Found leaked ForkJoinPool thread thread=%s",
723	>	thread);
724	>	}
725	>	}
726	>
727	>	if (!ForkJoinPool.commonPool()
728	>	.awaitQuiescence(LONG_DELAY_MS, MILLISECONDS))
729	>	tearDownFail("ForkJoin common pool thread stuck");
730		}
731
732		/**
733	<	* Fail, also setting status to indicate current testcase should fail
733	>	* Just like fail(reason), but additionally recording (using
734	>	* threadRecordFailure) any AssertionFailedError thrown, so that
735	>	* the current testcase will fail.
736		*/
737		public void threadFail(String reason) {
738	<	threadFailed = true;
739	<	fail(reason);
738	>	try {
739	>	fail(reason);
740	>	} catch (AssertionFailedError t) {
741	>	threadRecordFailure(t);
742	>	throw t;
743	>	}
744		}
745
746		/**
747	<	* If expression not true, set status to indicate current testcase
748	<	* should fail
747	>	* Just like assertTrue(b), but additionally recording (using
748	>	* threadRecordFailure) any AssertionFailedError thrown, so that
749	>	* the current testcase will fail.
750		*/
751		public void threadAssertTrue(boolean b) {
752	<	if (!b) {
239	<	threadFailed = true;
752	>	try {
753		assertTrue(b);
754	+	} catch (AssertionFailedError t) {
755	+	threadRecordFailure(t);
756	+	throw t;
757		}
758		}
759
760		/**
761	<	* If expression not false, set status to indicate current testcase
762	<	* should fail
761	>	* Just like assertFalse(b), but additionally recording (using
762	>	* threadRecordFailure) any AssertionFailedError thrown, so that
763	>	* the current testcase will fail.
764		*/
765		public void threadAssertFalse(boolean b) {
766	<	if (b) {
250	<	threadFailed = true;
766	>	try {
767		assertFalse(b);
768	+	} catch (AssertionFailedError t) {
769	+	threadRecordFailure(t);
770	+	throw t;
771		}
772		}
773
774		/**
775	<	* If argument not null, set status to indicate current testcase
776	<	* should fail
775	>	* Just like assertNull(x), but additionally recording (using
776	>	* threadRecordFailure) any AssertionFailedError thrown, so that
777	>	* the current testcase will fail.
778		*/
779		public void threadAssertNull(Object x) {
780	<	if (x != null) {
261	<	threadFailed = true;
780	>	try {
781		assertNull(x);
782	+	} catch (AssertionFailedError t) {
783	+	threadRecordFailure(t);
784	+	throw t;
785		}
786		}
787
788		/**
789	<	* If arguments not equal, set status to indicate current testcase
790	<	* should fail
789	>	* Just like assertEquals(x, y), but additionally recording (using
790	>	* threadRecordFailure) any AssertionFailedError thrown, so that
791	>	* the current testcase will fail.
792		*/
793		public void threadAssertEquals(long x, long y) {
794	<	if (x != y) {
272	<	threadFailed = true;
794	>	try {
795		assertEquals(x, y);
796	+	} catch (AssertionFailedError t) {
797	+	threadRecordFailure(t);
798	+	throw t;
799		}
800		}
801
802		/**
803	<	* If arguments not equal, set status to indicate current testcase
804	<	* should fail
803	>	* Just like assertEquals(x, y), but additionally recording (using
804	>	* threadRecordFailure) any AssertionFailedError thrown, so that
805	>	* the current testcase will fail.
806		*/
807		public void threadAssertEquals(Object x, Object y) {
808	<	if (x != y && (x == null || !x.equals(y))) {
283	<	threadFailed = true;
808	>	try {
809		assertEquals(x, y);
810	+	} catch (AssertionFailedError fail) {
811	+	threadRecordFailure(fail);
812	+	throw fail;
813	+	} catch (Throwable fail) {
814	+	threadUnexpectedException(fail);
815	+	}
816	+	}
817	+
818	+	/**
819	+	* Just like assertSame(x, y), but additionally recording (using
820	+	* threadRecordFailure) any AssertionFailedError thrown, so that
821	+	* the current testcase will fail.
822	+	*/
823	+	public void threadAssertSame(Object x, Object y) {
824	+	try {
825	+	assertSame(x, y);
826	+	} catch (AssertionFailedError fail) {
827	+	threadRecordFailure(fail);
828	+	throw fail;
829		}
830		}
831
832		/**
833	<	* threadFail with message "should throw exception"
833	>	* Calls threadFail with message "should throw exception".
834		*/
835		public void threadShouldThrow() {
836	<	threadFailed = true;
293	<	fail("should throw exception");
836	>	threadFail("should throw exception");
837		}
838
839		/**
840	<	* threadFail with message "Unexpected exception"
840	>	* Calls threadFail with message "should throw" + exceptionName.
841		*/
842	<	public void threadUnexpectedException() {
843	<	threadFailed = true;
301	<	fail("Unexpected exception");
842	>	public void threadShouldThrow(String exceptionName) {
843	>	threadFail("should throw " + exceptionName);
844		}
845
846		/**
847	<	* threadFail with message "Unexpected exception", with argument
847	>	* Records the given exception using {@link #threadRecordFailure},
848	>	* then rethrows the exception, wrapping it in an
849	>	* AssertionFailedError if necessary.
850		*/
851	<	public void threadUnexpectedException(Throwable ex) {
852	<	threadFailed = true;
853	<	ex.printStackTrace();
854	<	fail("Unexpected exception: " + ex);
851	>	public void threadUnexpectedException(Throwable t) {
852	>	threadRecordFailure(t);
853	>	t.printStackTrace();
854	>	if (t instanceof RuntimeException)
855	>	throw (RuntimeException) t;
856	>	else if (t instanceof Error)
857	>	throw (Error) t;
858	>	else {
859	>	AssertionFailedError afe =
860	>	new AssertionFailedError("unexpected exception: " + t);
861	>	afe.initCause(t);
862	>	throw afe;
863	>	}
864	>	}
865	>
866	>	/**
867	>	* Delays, via Thread.sleep, for the given millisecond delay, but
868	>	* if the sleep is shorter than specified, may re-sleep or yield
869	>	* until time elapses.  Ensures that the given time, as measured
870	>	* by System.nanoTime(), has elapsed.
871	>	*/
872	>	static void delay(long millis) throws InterruptedException {
873	>	long nanos = millis * (1000 * 1000);
874	>	final long wakeupTime = System.nanoTime() + nanos;
875	>	do {
876	>	if (millis > 0L)
877	>	Thread.sleep(millis);
878	>	else // too short to sleep
879	>	Thread.yield();
880	>	nanos = wakeupTime - System.nanoTime();
881	>	millis = nanos / (1000 * 1000);
882	>	} while (nanos >= 0L);
883	>	}
884	>
885	>	/**
886	>	* Allows use of try-with-resources with per-test thread pools.
887	>	*/
888	>	class PoolCleaner implements AutoCloseable {
889	>	private final ExecutorService pool;
890	>	public PoolCleaner(ExecutorService pool) { this.pool = pool; }
891	>	public void close() { joinPool(pool); }
892	>	}
893	>
894	>	/**
895	>	* An extension of PoolCleaner that has an action to release the pool.
896	>	*/
897	>	class PoolCleanerWithReleaser extends PoolCleaner {
898	>	private final Runnable releaser;
899	>	public PoolCleanerWithReleaser(ExecutorService pool, Runnable releaser) {
900	>	super(pool);
901	>	this.releaser = releaser;
902	>	}
903	>	public void close() {
904	>	try {
905	>	releaser.run();
906	>	} finally {
907	>	super.close();
908	>	}
909	>	}
910	>	}
911	>
912	>	PoolCleaner cleaner(ExecutorService pool) {
913	>	return new PoolCleaner(pool);
914	>	}
915	>
916	>	PoolCleaner cleaner(ExecutorService pool, Runnable releaser) {
917	>	return new PoolCleanerWithReleaser(pool, releaser);
918	>	}
919	>
920	>	PoolCleaner cleaner(ExecutorService pool, CountDownLatch latch) {
921	>	return new PoolCleanerWithReleaser(pool, releaser(latch));
922	>	}
923	>
924	>	Runnable releaser(final CountDownLatch latch) {
925	>	return new Runnable() { public void run() {
926	>	do { latch.countDown(); }
927	>	while (latch.getCount() > 0);
928	>	}};
929	>	}
930	>
931	>	PoolCleaner cleaner(ExecutorService pool, AtomicBoolean flag) {
932	>	return new PoolCleanerWithReleaser(pool, releaser(flag));
933	>	}
934	>
935	>	Runnable releaser(final AtomicBoolean flag) {
936	>	return new Runnable() { public void run() { flag.set(true); }};
937		}
938
939		/**
940	<	* Wait out termination of a thread pool or fail doing so
940	>	* Waits out termination of a thread pool or fails doing so.
941		*/
942	<	public void joinPool(ExecutorService exec) {
942	>	void joinPool(ExecutorService pool) {
943		try {
944	<	exec.shutdown();
945	<	assertTrue(exec.awaitTermination(LONG_DELAY_MS, MILLISECONDS));
944	>	pool.shutdown();
945	>	if (!pool.awaitTermination(2 * LONG_DELAY_MS, MILLISECONDS)) {
946	>	try {
947	>	threadFail("ExecutorService " + pool +
948	>	" did not terminate in a timely manner");
949	>	} finally {
950	>	// last resort, for the benefit of subsequent tests
951	>	pool.shutdownNow();
952	>	pool.awaitTermination(MEDIUM_DELAY_MS, MILLISECONDS);
953	>	}
954	>	}
955		} catch (SecurityException ok) {
956		// Allowed in case test doesn't have privs
957	<	} catch (InterruptedException ie) {
958	<	fail("Unexpected exception");
957	>	} catch (InterruptedException fail) {
958	>	threadFail("Unexpected InterruptedException");
959		}
960		}
961
962	+	/**
963	+	* Like Runnable, but with the freedom to throw anything.
964	+	* junit folks had the same idea:
965	+	* http://junit.org/junit5/docs/snapshot/api/org/junit/gen5/api/Executable.html
966	+	*/
967	+	interface Action { public void run() throws Throwable; }
968
969		/**
970	<	* fail with message "should throw exception"
970	>	* Runs all the given actions in parallel, failing if any fail.
971	>	* Useful for running multiple variants of tests that are
972	>	* necessarily individually slow because they must block.
973		*/
974	<	public void shouldThrow() {
975	<	fail("Should throw exception");
974	>	void testInParallel(Action ... actions) {
975	>	ExecutorService pool = Executors.newCachedThreadPool();
976	>	try (PoolCleaner cleaner = cleaner(pool)) {
977	>	ArrayList<Future<?>> futures = new ArrayList<>(actions.length);
978	>	for (final Action action : actions)
979	>	futures.add(pool.submit(new CheckedRunnable() {
980	>	public void realRun() throws Throwable { action.run();}}));
981	>	for (Future<?> future : futures)
982	>	try {
983	>	assertNull(future.get(LONG_DELAY_MS, MILLISECONDS));
984	>	} catch (ExecutionException ex) {
985	>	threadUnexpectedException(ex.getCause());
986	>	} catch (Exception ex) {
987	>	threadUnexpectedException(ex);
988	>	}
989	>	}
990		}
991
992		/**
993	<	* fail with message "Unexpected exception"
993	>	* A debugging tool to print stack traces of most threads, as jstack does.
994	>	* Uninteresting threads are filtered out.
995		*/
996	<	public void unexpectedException() {
997	<	fail("Unexpected exception");
996	>	static void dumpTestThreads() {
997	>	SecurityManager sm = System.getSecurityManager();
998	>	if (sm != null) {
999	>	try {
1000	>	System.setSecurityManager(null);
1001	>	} catch (SecurityException giveUp) {
1002	>	return;
1003	>	}
1004	>	}
1005	>
1006	>	ThreadMXBean threadMXBean = ManagementFactory.getThreadMXBean();
1007	>	System.err.println("------ stacktrace dump start ------");
1008	>	for (ThreadInfo info : threadMXBean.dumpAllThreads(true, true)) {
1009	>	final String name = info.getThreadName();
1010	>	String lockName;
1011	>	if ("Signal Dispatcher".equals(name))
1012	>	continue;
1013	>	if ("Reference Handler".equals(name)
1014	>	&& (lockName = info.getLockName()) != null
1015	>	&& lockName.startsWith("java.lang.ref.Reference$Lock"))
1016	>	continue;
1017	>	if ("Finalizer".equals(name)
1018	>	&& (lockName = info.getLockName()) != null
1019	>	&& lockName.startsWith("java.lang.ref.ReferenceQueue$Lock"))
1020	>	continue;
1021	>	if ("checkForWedgedTest".equals(name))
1022	>	continue;
1023	>	System.err.print(info);
1024	>	}
1025	>	System.err.println("------ stacktrace dump end ------");
1026	>
1027	>	if (sm != null) System.setSecurityManager(sm);
1028	>	}
1029	>
1030	>	/**
1031	>	* Checks that thread does not terminate within the default
1032	>	* millisecond delay of {@code timeoutMillis()}.
1033	>	*/
1034	>	void assertThreadStaysAlive(Thread thread) {
1035	>	assertThreadStaysAlive(thread, timeoutMillis());
1036		}
1037
1038		/**
1039	<	* fail with message "Unexpected exception", with argument
1039	>	* Checks that thread does not terminate within the given millisecond delay.
1040		*/
1041	<	public void unexpectedException(Throwable ex) {
1042	<	ex.printStackTrace();
1043	<	fail("Unexpected exception: " + ex);
1041	>	void assertThreadStaysAlive(Thread thread, long millis) {
1042	>	try {
1043	>	// No need to optimize the failing case via Thread.join.
1044	>	delay(millis);
1045	>	assertTrue(thread.isAlive());
1046	>	} catch (InterruptedException fail) {
1047	>	threadFail("Unexpected InterruptedException");
1048	>	}
1049		}
1050
1051	+	/**
1052	+	* Checks that the threads do not terminate within the default
1053	+	* millisecond delay of {@code timeoutMillis()}.
1054	+	*/
1055	+	void assertThreadsStayAlive(Thread... threads) {
1056	+	assertThreadsStayAlive(timeoutMillis(), threads);
1057	+	}
1058	+
1059	+	/**
1060	+	* Checks that the threads do not terminate within the given millisecond delay.
1061	+	*/
1062	+	void assertThreadsStayAlive(long millis, Thread... threads) {
1063	+	try {
1064	+	// No need to optimize the failing case via Thread.join.
1065	+	delay(millis);
1066	+	for (Thread thread : threads)
1067	+	assertTrue(thread.isAlive());
1068	+	} catch (InterruptedException fail) {
1069	+	threadFail("Unexpected InterruptedException");
1070	+	}
1071	+	}
1072	+
1073	+	/**
1074	+	* Checks that future.get times out, with the default timeout of
1075	+	* {@code timeoutMillis()}.
1076	+	*/
1077	+	void assertFutureTimesOut(Future future) {
1078	+	assertFutureTimesOut(future, timeoutMillis());
1079	+	}
1080	+
1081	+	/**
1082	+	* Checks that future.get times out, with the given millisecond timeout.
1083	+	*/
1084	+	void assertFutureTimesOut(Future future, long timeoutMillis) {
1085	+	long startTime = System.nanoTime();
1086	+	try {
1087	+	future.get(timeoutMillis, MILLISECONDS);
1088	+	shouldThrow();
1089	+	} catch (TimeoutException success) {
1090	+	} catch (Exception fail) {
1091	+	threadUnexpectedException(fail);
1092	+	} finally { future.cancel(true); }
1093	+	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
1094	+	}
1095	+
1096	+	/**
1097	+	* Fails with message "should throw exception".
1098	+	*/
1099	+	public void shouldThrow() {
1100	+	fail("Should throw exception");
1101	+	}
1102	+
1103	+	/**
1104	+	* Fails with message "should throw " + exceptionName.
1105	+	*/
1106	+	public void shouldThrow(String exceptionName) {
1107	+	fail("Should throw " + exceptionName);
1108	+	}
1109
1110		/**
1111		* The number of elements to place in collections, arrays, etc.
1112		*/
1113	<	static final int SIZE = 20;
1113	>	public static final int SIZE = 20;
1114
1115		// Some convenient Integer constants
1116
1117	<	static final Integer zero = new Integer(0);
1118	<	static final Integer one = new Integer(1);
1119	<	static final Integer two = new Integer(2);
1120	<	static final Integer three  = new Integer(3);
1121	<	static final Integer four  = new Integer(4);
1122	<	static final Integer five  = new Integer(5);
1123	<	static final Integer six = new Integer(6);
1124	<	static final Integer seven = new Integer(7);
1125	<	static final Integer eight = new Integer(8);
1126	<	static final Integer nine = new Integer(9);
1127	<	static final Integer m1  = new Integer(-1);
1128	<	static final Integer m2  = new Integer(-2);
1129	<	static final Integer m3  = new Integer(-3);
1130	<	static final Integer m4 = new Integer(-4);
1131	<	static final Integer m5 = new Integer(-5);
1132	<	static final Integer m6 = new Integer(-6);
1133	<	static final Integer m10 = new Integer(-10);
1117	>	public static final Integer zero  = new Integer(0);
1118	>	public static final Integer one   = new Integer(1);
1119	>	public static final Integer two   = new Integer(2);
1120	>	public static final Integer three = new Integer(3);
1121	>	public static final Integer four  = new Integer(4);
1122	>	public static final Integer five  = new Integer(5);
1123	>	public static final Integer six   = new Integer(6);
1124	>	public static final Integer seven = new Integer(7);
1125	>	public static final Integer eight = new Integer(8);
1126	>	public static final Integer nine  = new Integer(9);
1127	>	public static final Integer m1  = new Integer(-1);
1128	>	public static final Integer m2  = new Integer(-2);
1129	>	public static final Integer m3  = new Integer(-3);
1130	>	public static final Integer m4  = new Integer(-4);
1131	>	public static final Integer m5  = new Integer(-5);
1132	>	public static final Integer m6  = new Integer(-6);
1133	>	public static final Integer m10 = new Integer(-10);
1134	>
1135	>	/**
1136	>	* Runs Runnable r with a security policy that permits precisely
1137	>	* the specified permissions.  If there is no current security
1138	>	* manager, the runnable is run twice, both with and without a
1139	>	* security manager.  We require that any security manager permit
1140	>	* getPolicy/setPolicy.
1141	>	*/
1142	>	public void runWithPermissions(Runnable r, Permission... permissions) {
1143	>	SecurityManager sm = System.getSecurityManager();
1144	>	if (sm == null) {
1145	>	r.run();
1146	>	}
1147	>	runWithSecurityManagerWithPermissions(r, permissions);
1148	>	}
1149
1150	+	/**
1151	+	* Runs Runnable r with a security policy that permits precisely
1152	+	* the specified permissions.  If there is no current security
1153	+	* manager, a temporary one is set for the duration of the
1154	+	* Runnable.  We require that any security manager permit
1155	+	* getPolicy/setPolicy.
1156	+	*/
1157	+	public void runWithSecurityManagerWithPermissions(Runnable r,
1158	+	Permission... permissions) {
1159	+	SecurityManager sm = System.getSecurityManager();
1160	+	if (sm == null) {
1161	+	Policy savedPolicy = Policy.getPolicy();
1162	+	try {
1163	+	Policy.setPolicy(permissivePolicy());
1164	+	System.setSecurityManager(new SecurityManager());
1165	+	runWithSecurityManagerWithPermissions(r, permissions);
1166	+	} finally {
1167	+	System.setSecurityManager(null);
1168	+	Policy.setPolicy(savedPolicy);
1169	+	}
1170	+	} else {
1171	+	Policy savedPolicy = Policy.getPolicy();
1172	+	AdjustablePolicy policy = new AdjustablePolicy(permissions);
1173	+	Policy.setPolicy(policy);
1174	+
1175	+	try {
1176	+	r.run();
1177	+	} finally {
1178	+	policy.addPermission(new SecurityPermission("setPolicy"));
1179	+	Policy.setPolicy(savedPolicy);
1180	+	}
1181	+	}
1182	+	}
1183	+
1184	+	/**
1185	+	* Runs a runnable without any permissions.
1186	+	*/
1187	+	public void runWithoutPermissions(Runnable r) {
1188	+	runWithPermissions(r);
1189	+	}
1190
1191		/**
1192		* A security policy where new permissions can be dynamically added
1193		* or all cleared.
1194		*/
1195	<	static class AdjustablePolicy extends java.security.Policy {
1195	>	public static class AdjustablePolicy extends java.security.Policy {
1196		Permissions perms = new Permissions();
1197	<	AdjustablePolicy() { }
1197	>	AdjustablePolicy(Permission... permissions) {
1198	>	for (Permission permission : permissions)
1199	>	perms.add(permission);
1200	>	}
1201		void addPermission(Permission perm) { perms.add(perm); }
1202		void clearPermissions() { perms = new Permissions(); }
1203	<	public PermissionCollection getPermissions(CodeSource cs) {
1204	<	return perms;
1205	<	}
1206	<	public PermissionCollection getPermissions(ProtectionDomain pd) {
1207	<	return perms;
1208	<	}
1209	<	public boolean implies(ProtectionDomain pd, Permission p) {
1210	<	return perms.implies(p);
1211	<	}
1212	<	public void refresh() {}
1203	>	public PermissionCollection getPermissions(CodeSource cs) {
1204	>	return perms;
1205	>	}
1206	>	public PermissionCollection getPermissions(ProtectionDomain pd) {
1207	>	return perms;
1208	>	}
1209	>	public boolean implies(ProtectionDomain pd, Permission p) {
1210	>	return perms.implies(p);
1211	>	}
1212	>	public void refresh() {}
1213	>	public String toString() {
1214	>	List<Permission> ps = new ArrayList<Permission>();
1215	>	for (Enumeration<Permission> e = perms.elements(); e.hasMoreElements();)
1216	>	ps.add(e.nextElement());
1217	>	return "AdjustablePolicy with permissions " + ps;
1218	>	}
1219		}
1220
1221		/**
1222	<	* Sleep until the timeout has elapsed, or interrupted.
400	<	* Does <em>NOT</em> throw InterruptedException.
1222	>	* Returns a policy containing all the permissions we ever need.
1223		*/
1224	<	void sleepTillInterrupted(long timeoutMillis) {
1224	>	public static Policy permissivePolicy() {
1225	>	return new AdjustablePolicy
1226	>	// Permissions j.u.c. needs directly
1227	>	(new RuntimePermission("modifyThread"),
1228	>	new RuntimePermission("getClassLoader"),
1229	>	new RuntimePermission("setContextClassLoader"),
1230	>	// Permissions needed to change permissions!
1231	>	new SecurityPermission("getPolicy"),
1232	>	new SecurityPermission("setPolicy"),
1233	>	new RuntimePermission("setSecurityManager"),
1234	>	// Permissions needed by the junit test harness
1235	>	new RuntimePermission("accessDeclaredMembers"),
1236	>	new PropertyPermission("*", "read"),
1237	>	new java.io.FilePermission("<<ALL FILES>>", "read"));
1238	>	}
1239	>
1240	>	/**
1241	>	* Sleeps until the given time has elapsed.
1242	>	* Throws AssertionFailedError if interrupted.
1243	>	*/
1244	>	static void sleep(long millis) {
1245		try {
1246	<	Thread.sleep(timeoutMillis);
1247	<	} catch (InterruptedException wakeup) {
1246	>	delay(millis);
1247	>	} catch (InterruptedException fail) {
1248	>	AssertionFailedError afe =
1249	>	new AssertionFailedError("Unexpected InterruptedException");
1250	>	afe.initCause(fail);
1251	>	throw afe;
1252		}
1253		}
1254
1255		/**
1256	<	* Returns a new started Thread running the given runnable.
1256	>	* Spin-waits up to the specified number of milliseconds for the given
1257	>	* thread to enter a wait state: BLOCKED, WAITING, or TIMED_WAITING.
1258	>	*/
1259	>	void waitForThreadToEnterWaitState(Thread thread, long timeoutMillis) {
1260	>	long startTime = 0L;
1261	>	for (;;) {
1262	>	Thread.State s = thread.getState();
1263	>	if (s == Thread.State.BLOCKED ||
1264	>	s == Thread.State.WAITING ||
1265	>	s == Thread.State.TIMED_WAITING)
1266	>	return;
1267	>	else if (s == Thread.State.TERMINATED)
1268	>	fail("Unexpected thread termination");
1269	>	else if (startTime == 0L)
1270	>	startTime = System.nanoTime();
1271	>	else if (millisElapsedSince(startTime) > timeoutMillis) {
1272	>	threadAssertTrue(thread.isAlive());
1273	>	return;
1274	>	}
1275	>	Thread.yield();
1276	>	}
1277	>	}
1278	>
1279	>	/**
1280	>	* Waits up to LONG_DELAY_MS for the given thread to enter a wait
1281	>	* state: BLOCKED, WAITING, or TIMED_WAITING.
1282	>	*/
1283	>	void waitForThreadToEnterWaitState(Thread thread) {
1284	>	waitForThreadToEnterWaitState(thread, LONG_DELAY_MS);
1285	>	}
1286	>
1287	>	/**
1288	>	* Returns the number of milliseconds since time given by
1289	>	* startNanoTime, which must have been previously returned from a
1290	>	* call to {@link System#nanoTime()}.
1291	>	*/
1292	>	static long millisElapsedSince(long startNanoTime) {
1293	>	return NANOSECONDS.toMillis(System.nanoTime() - startNanoTime);
1294	>	}
1295	>
1296	>	//     void assertTerminatesPromptly(long timeoutMillis, Runnable r) {
1297	>	//         long startTime = System.nanoTime();
1298	>	//         try {
1299	>	//             r.run();
1300	>	//         } catch (Throwable fail) { threadUnexpectedException(fail); }
1301	>	//         if (millisElapsedSince(startTime) > timeoutMillis/2)
1302	>	//             throw new AssertionFailedError("did not return promptly");
1303	>	//     }
1304	>
1305	>	//     void assertTerminatesPromptly(Runnable r) {
1306	>	//         assertTerminatesPromptly(LONG_DELAY_MS/2, r);
1307	>	//     }
1308	>
1309	>	/**
1310	>	* Checks that timed f.get() returns the expected value, and does not
1311	>	* wait for the timeout to elapse before returning.
1312	>	*/
1313	>	<T> void checkTimedGet(Future<T> f, T expectedValue, long timeoutMillis) {
1314	>	long startTime = System.nanoTime();
1315	>	try {
1316	>	assertEquals(expectedValue, f.get(timeoutMillis, MILLISECONDS));
1317	>	} catch (Throwable fail) { threadUnexpectedException(fail); }
1318	>	if (millisElapsedSince(startTime) > timeoutMillis/2)
1319	>	throw new AssertionFailedError("timed get did not return promptly");
1320	>	}
1321	>
1322	>	<T> void checkTimedGet(Future<T> f, T expectedValue) {
1323	>	checkTimedGet(f, expectedValue, LONG_DELAY_MS);
1324	>	}
1325	>
1326	>	/**
1327	>	* Returns a new started daemon Thread running the given runnable.
1328		*/
1329		Thread newStartedThread(Runnable runnable) {
1330		Thread t = new Thread(runnable);
1331	+	t.setDaemon(true);
1332		t.start();
1333		return t;
1334		}
1335
1336	+	/**
1337	+	* Waits for the specified time (in milliseconds) for the thread
1338	+	* to terminate (using {@link Thread#join(long)}), else interrupts
1339	+	* the thread (in the hope that it may terminate later) and fails.
1340	+	*/
1341	+	void awaitTermination(Thread t, long timeoutMillis) {
1342	+	try {
1343	+	t.join(timeoutMillis);
1344	+	} catch (InterruptedException fail) {
1345	+	threadUnexpectedException(fail);
1346	+	} finally {
1347	+	if (t.getState() != Thread.State.TERMINATED) {
1348	+	t.interrupt();
1349	+	threadFail("timed out waiting for thread to terminate");
1350	+	}
1351	+	}
1352	+	}
1353	+
1354	+	/**
1355	+	* Waits for LONG_DELAY_MS milliseconds for the thread to
1356	+	* terminate (using {@link Thread#join(long)}), else interrupts
1357	+	* the thread (in the hope that it may terminate later) and fails.
1358	+	*/
1359	+	void awaitTermination(Thread t) {
1360	+	awaitTermination(t, LONG_DELAY_MS);
1361	+	}
1362	+
1363		// Some convenient Runnable classes
1364
1365	<	abstract class CheckedRunnable implements Runnable {
1366	<	abstract void realRun() throws Throwable;
1365	>	public abstract class CheckedRunnable implements Runnable {
1366	>	protected abstract void realRun() throws Throwable;
1367
1368		public final void run() {
1369		try {
1370		realRun();
1371	+	} catch (Throwable fail) {
1372	+	threadUnexpectedException(fail);
1373	+	}
1374	+	}
1375	+	}
1376	+
1377	+	public abstract class RunnableShouldThrow implements Runnable {
1378	+	protected abstract void realRun() throws Throwable;
1379	+
1380	+	final Class<?> exceptionClass;
1381	+
1382	+	<T extends Throwable> RunnableShouldThrow(Class<T> exceptionClass) {
1383	+	this.exceptionClass = exceptionClass;
1384	+	}
1385	+
1386	+	public final void run() {
1387	+	try {
1388	+	realRun();
1389	+	threadShouldThrow(exceptionClass.getSimpleName());
1390		} catch (Throwable t) {
1391	<	threadUnexpectedException(t);
1391	>	if (! exceptionClass.isInstance(t))
1392	>	threadUnexpectedException(t);
1393		}
1394		}
1395		}
1396
1397	<	abstract class CheckedInterruptedRunnable implements Runnable {
1398	<	abstract void realRun() throws Throwable;
1397	>	public abstract class ThreadShouldThrow extends Thread {
1398	>	protected abstract void realRun() throws Throwable;
1399	>
1400	>	final Class<?> exceptionClass;
1401	>
1402	>	<T extends Throwable> ThreadShouldThrow(Class<T> exceptionClass) {
1403	>	this.exceptionClass = exceptionClass;
1404	>	}
1405
1406		public final void run() {
1407		try {
1408		realRun();
1409	<	threadShouldThrow();
439	<	} catch (InterruptedException success) {
1409	>	threadShouldThrow(exceptionClass.getSimpleName());
1410		} catch (Throwable t) {
1411	<	threadUnexpectedException(t);
1411	>	if (! exceptionClass.isInstance(t))
1412	>	threadUnexpectedException(t);
1413		}
1414		}
1415		}
1416
1417	<	abstract class CheckedCallable<T> implements Callable<T> {
1418	<	abstract T realCall() throws Throwable;
1417	>	public abstract class CheckedInterruptedRunnable implements Runnable {
1418	>	protected abstract void realRun() throws Throwable;
1419	>
1420	>	public final void run() {
1421	>	try {
1422	>	realRun();
1423	>	threadShouldThrow("InterruptedException");
1424	>	} catch (InterruptedException success) {
1425	>	threadAssertFalse(Thread.interrupted());
1426	>	} catch (Throwable fail) {
1427	>	threadUnexpectedException(fail);
1428	>	}
1429	>	}
1430	>	}
1431	>
1432	>	public abstract class CheckedCallable<T> implements Callable<T> {
1433	>	protected abstract T realCall() throws Throwable;
1434
1435		public final T call() {
1436		try {
1437		return realCall();
1438	<	} catch (Throwable t) {
1439	<	threadUnexpectedException(t);
1438	>	} catch (Throwable fail) {
1439	>	threadUnexpectedException(fail);
1440		return null;
1441		}
1442		}
1443		}
1444
1445	<	static class NoOpRunnable implements Runnable {
1445	>	public abstract class CheckedInterruptedCallable<T>
1446	>	implements Callable<T> {
1447	>	protected abstract T realCall() throws Throwable;
1448	>
1449	>	public final T call() {
1450	>	try {
1451	>	T result = realCall();
1452	>	threadShouldThrow("InterruptedException");
1453	>	return result;
1454	>	} catch (InterruptedException success) {
1455	>	threadAssertFalse(Thread.interrupted());
1456	>	} catch (Throwable fail) {
1457	>	threadUnexpectedException(fail);
1458	>	}
1459	>	return null;
1460	>	}
1461	>	}
1462	>
1463	>	public static class NoOpRunnable implements Runnable {
1464		public void run() {}
1465		}
1466
1467	<	static class NoOpCallable implements Callable {
1467	>	public static class NoOpCallable implements Callable {
1468		public Object call() { return Boolean.TRUE; }
1469		}
1470
1471	<	static final String TEST_STRING = "a test string";
1471	>	public static final String TEST_STRING = "a test string";
1472	>
1473	>	public static class StringTask implements Callable<String> {
1474	>	final String value;
1475	>	public StringTask() { this(TEST_STRING); }
1476	>	public StringTask(String value) { this.value = value; }
1477	>	public String call() { return value; }
1478	>	}
1479	>
1480	>	public Callable<String> latchAwaitingStringTask(final CountDownLatch latch) {
1481	>	return new CheckedCallable<String>() {
1482	>	protected String realCall() {
1483	>	try {
1484	>	latch.await();
1485	>	} catch (InterruptedException quittingTime) {}
1486	>	return TEST_STRING;
1487	>	}};
1488	>	}
1489
1490	<	static class StringTask implements Callable<String> {
1491	<	public String call() { return TEST_STRING; }
1490	>	public Runnable countDowner(final CountDownLatch latch) {
1491	>	return new CheckedRunnable() {
1492	>	public void realRun() throws InterruptedException {
1493	>	latch.countDown();
1494	>	}};
1495		}
1496
1497	<	static class NPETask implements Callable<String> {
1497	>	class LatchAwaiter extends CheckedRunnable {
1498	>	static final int NEW = 0;
1499	>	static final int RUNNING = 1;
1500	>	static final int DONE = 2;
1501	>	final CountDownLatch latch;
1502	>	int state = NEW;
1503	>	LatchAwaiter(CountDownLatch latch) { this.latch = latch; }
1504	>	public void realRun() throws InterruptedException {
1505	>	state = 1;
1506	>	await(latch);
1507	>	state = 2;
1508	>	}
1509	>	}
1510	>
1511	>	public LatchAwaiter awaiter(CountDownLatch latch) {
1512	>	return new LatchAwaiter(latch);
1513	>	}
1514	>
1515	>	public void await(CountDownLatch latch, long timeoutMillis) {
1516	>	try {
1517	>	if (!latch.await(timeoutMillis, MILLISECONDS))
1518	>	fail("timed out waiting for CountDownLatch for "
1519	>	+ (timeoutMillis/1000) + " sec");
1520	>	} catch (Throwable fail) {
1521	>	threadUnexpectedException(fail);
1522	>	}
1523	>	}
1524	>
1525	>	public void await(CountDownLatch latch) {
1526	>	await(latch, LONG_DELAY_MS);
1527	>	}
1528	>
1529	>	public void await(Semaphore semaphore) {
1530	>	try {
1531	>	if (!semaphore.tryAcquire(LONG_DELAY_MS, MILLISECONDS))
1532	>	fail("timed out waiting for Semaphore for "
1533	>	+ (LONG_DELAY_MS/1000) + " sec");
1534	>	} catch (Throwable fail) {
1535	>	threadUnexpectedException(fail);
1536	>	}
1537	>	}
1538	>
1539	>	//     /**
1540	>	//      * Spin-waits up to LONG_DELAY_MS until flag becomes true.
1541	>	//      */
1542	>	//     public void await(AtomicBoolean flag) {
1543	>	//         await(flag, LONG_DELAY_MS);
1544	>	//     }
1545	>
1546	>	//     /**
1547	>	//      * Spin-waits up to the specified timeout until flag becomes true.
1548	>	//      */
1549	>	//     public void await(AtomicBoolean flag, long timeoutMillis) {
1550	>	//         long startTime = System.nanoTime();
1551	>	//         while (!flag.get()) {
1552	>	//             if (millisElapsedSince(startTime) > timeoutMillis)
1553	>	//                 throw new AssertionFailedError("timed out");
1554	>	//             Thread.yield();
1555	>	//         }
1556	>	//     }
1557	>
1558	>	public static class NPETask implements Callable<String> {
1559		public String call() { throw new NullPointerException(); }
1560		}
1561
1562	<	static class CallableOne implements Callable<Integer> {
1562	>	public static class CallableOne implements Callable<Integer> {
1563		public Integer call() { return one; }
1564		}
1565
1566	<	class ShortRunnable extends CheckedRunnable {
1567	<	void realRun() throws Throwable {
1568	<	Thread.sleep(SHORT_DELAY_MS);
1566	>	public class ShortRunnable extends CheckedRunnable {
1567	>	protected void realRun() throws Throwable {
1568	>	delay(SHORT_DELAY_MS);
1569		}
1570		}
1571
1572	<	class ShortInterruptedRunnable extends CheckedInterruptedRunnable {
1573	<	void realRun() throws InterruptedException {
1574	<	Thread.sleep(SHORT_DELAY_MS);
1572	>	public class ShortInterruptedRunnable extends CheckedInterruptedRunnable {
1573	>	protected void realRun() throws InterruptedException {
1574	>	delay(SHORT_DELAY_MS);
1575		}
1576		}
1577
1578	<	class SmallRunnable extends CheckedRunnable {
1579	<	void realRun() throws Throwable {
1580	<	Thread.sleep(SMALL_DELAY_MS);
1578	>	public class SmallRunnable extends CheckedRunnable {
1579	>	protected void realRun() throws Throwable {
1580	>	delay(SMALL_DELAY_MS);
1581		}
1582		}
1583
1584	<	class SmallPossiblyInterruptedRunnable extends CheckedRunnable {
1585	<	void realRun() {
1584	>	public class SmallPossiblyInterruptedRunnable extends CheckedRunnable {
1585	>	protected void realRun() {
1586		try {
1587	<	Thread.sleep(SMALL_DELAY_MS);
1588	<	}
504	<	catch (InterruptedException ok) {
505	<	}
1587	>	delay(SMALL_DELAY_MS);
1588	>	} catch (InterruptedException ok) {}
1589		}
1590		}
1591
1592	<	class SmallCallable extends CheckedCallable {
1593	<	Object realCall() throws Throwable {
1594	<	Thread.sleep(SMALL_DELAY_MS);
1592	>	public class SmallCallable extends CheckedCallable {
1593	>	protected Object realCall() throws InterruptedException {
1594	>	delay(SMALL_DELAY_MS);
1595		return Boolean.TRUE;
1596		}
1597		}
1598
1599	<	class SmallInterruptedRunnable extends CheckedInterruptedRunnable {
1600	<	void realRun() throws InterruptedException {
1601	<	Thread.sleep(SMALL_DELAY_MS);
1599	>	public class MediumRunnable extends CheckedRunnable {
1600	>	protected void realRun() throws Throwable {
1601	>	delay(MEDIUM_DELAY_MS);
1602		}
1603		}
1604
1605	<	class MediumRunnable extends CheckedRunnable {
1606	<	void realRun() throws Throwable {
1607	<	Thread.sleep(MEDIUM_DELAY_MS);
1605	>	public class MediumInterruptedRunnable extends CheckedInterruptedRunnable {
1606	>	protected void realRun() throws InterruptedException {
1607	>	delay(MEDIUM_DELAY_MS);
1608		}
1609		}
1610
1611	<	class MediumInterruptedRunnable extends CheckedInterruptedRunnable {
1612	<	void realRun() throws InterruptedException {
1613	<	Thread.sleep(MEDIUM_DELAY_MS);
1614	<	}
1611	>	public Runnable possiblyInterruptedRunnable(final long timeoutMillis) {
1612	>	return new CheckedRunnable() {
1613	>	protected void realRun() {
1614	>	try {
1615	>	delay(timeoutMillis);
1616	>	} catch (InterruptedException ok) {}
1617	>	}};
1618		}
1619
1620	<	class MediumPossiblyInterruptedRunnable extends CheckedRunnable {
1621	<	void realRun() {
1620	>	public class MediumPossiblyInterruptedRunnable extends CheckedRunnable {
1621	>	protected void realRun() {
1622		try {
1623	<	Thread.sleep(MEDIUM_DELAY_MS);
1624	<	}
539	<	catch (InterruptedException ok) {
540	<	}
1623	>	delay(MEDIUM_DELAY_MS);
1624	>	} catch (InterruptedException ok) {}
1625		}
1626		}
1627
1628	<	class LongPossiblyInterruptedRunnable extends CheckedRunnable {
1629	<	void realRun() {
1628	>	public class LongPossiblyInterruptedRunnable extends CheckedRunnable {
1629	>	protected void realRun() {
1630		try {
1631	<	Thread.sleep(LONG_DELAY_MS);
1632	<	}
549	<	catch (InterruptedException ok) {
550	<	}
1631	>	delay(LONG_DELAY_MS);
1632	>	} catch (InterruptedException ok) {}
1633		}
1634		}
1635
1636		/**
1637		* For use as ThreadFactory in constructors
1638		*/
1639	<	static class SimpleThreadFactory implements ThreadFactory {
1639	>	public static class SimpleThreadFactory implements ThreadFactory {
1640		public Thread newThread(Runnable r) {
1641		return new Thread(r);
1642		}
1643		}
1644
1645	<	static class TrackedShortRunnable implements Runnable {
1646	<	volatile boolean done = false;
1645	>	public interface TrackedRunnable extends Runnable {
1646	>	boolean isDone();
1647	>	}
1648	>
1649	>	public static TrackedRunnable trackedRunnable(final long timeoutMillis) {
1650	>	return new TrackedRunnable() {
1651	>	private volatile boolean done = false;
1652	>	public boolean isDone() { return done; }
1653	>	public void run() {
1654	>	try {
1655	>	delay(timeoutMillis);
1656	>	done = true;
1657	>	} catch (InterruptedException ok) {}
1658	>	}
1659	>	};
1660	>	}
1661	>
1662	>	public static class TrackedShortRunnable implements Runnable {
1663	>	public volatile boolean done = false;
1664		public void run() {
1665		try {
1666	<	Thread.sleep(SMALL_DELAY_MS);
1666	>	delay(SHORT_DELAY_MS);
1667		done = true;
1668	<	} catch (Exception e) {
570	<	}
1668	>	} catch (InterruptedException ok) {}
1669		}
1670		}
1671
1672	<	static class TrackedMediumRunnable implements Runnable {
1673	<	volatile boolean done = false;
1672	>	public static class TrackedSmallRunnable implements Runnable {
1673	>	public volatile boolean done = false;
1674		public void run() {
1675		try {
1676	<	Thread.sleep(MEDIUM_DELAY_MS);
1676	>	delay(SMALL_DELAY_MS);
1677		done = true;
1678	<	} catch (Exception e) {
581	<	}
1678	>	} catch (InterruptedException ok) {}
1679		}
1680		}
1681
1682	<	static class TrackedLongRunnable implements Runnable {
1683	<	volatile boolean done = false;
1682	>	public static class TrackedMediumRunnable implements Runnable {
1683	>	public volatile boolean done = false;
1684		public void run() {
1685		try {
1686	<	Thread.sleep(LONG_DELAY_MS);
1686	>	delay(MEDIUM_DELAY_MS);
1687		done = true;
1688	<	} catch (Exception e) {
592	<	}
1688	>	} catch (InterruptedException ok) {}
1689		}
1690		}
1691
1692	<	static class TrackedNoOpRunnable implements Runnable {
1693	<	volatile boolean done = false;
1692	>	public static class TrackedLongRunnable implements Runnable {
1693	>	public volatile boolean done = false;
1694	>	public void run() {
1695	>	try {
1696	>	delay(LONG_DELAY_MS);
1697	>	done = true;
1698	>	} catch (InterruptedException ok) {}
1699	>	}
1700	>	}
1701	>
1702	>	public static class TrackedNoOpRunnable implements Runnable {
1703	>	public volatile boolean done = false;
1704		public void run() {
1705		done = true;
1706		}
1707		}
1708
1709	<	static class TrackedCallable implements Callable {
1710	<	volatile boolean done = false;
1709	>	public static class TrackedCallable implements Callable {
1710	>	public volatile boolean done = false;
1711		public Object call() {
1712		try {
1713	<	Thread.sleep(SMALL_DELAY_MS);
1713	>	delay(SMALL_DELAY_MS);
1714		done = true;
1715	<	} catch (Exception e) {
610	<	}
1715	>	} catch (InterruptedException ok) {}
1716		return Boolean.TRUE;
1717		}
1718		}
1719
1720	+	/**
1721	+	* Analog of CheckedRunnable for RecursiveAction
1722	+	*/
1723	+	public abstract class CheckedRecursiveAction extends RecursiveAction {
1724	+	protected abstract void realCompute() throws Throwable;
1725	+
1726	+	@Override protected final void compute() {
1727	+	try {
1728	+	realCompute();
1729	+	} catch (Throwable fail) {
1730	+	threadUnexpectedException(fail);
1731	+	}
1732	+	}
1733	+	}
1734	+
1735	+	/**
1736	+	* Analog of CheckedCallable for RecursiveTask
1737	+	*/
1738	+	public abstract class CheckedRecursiveTask<T> extends RecursiveTask<T> {
1739	+	protected abstract T realCompute() throws Throwable;
1740	+
1741	+	@Override protected final T compute() {
1742	+	try {
1743	+	return realCompute();
1744	+	} catch (Throwable fail) {
1745	+	threadUnexpectedException(fail);
1746	+	return null;
1747	+	}
1748	+	}
1749	+	}
1750
1751		/**
1752		* For use as RejectedExecutionHandler in constructors
1753		*/
1754	<	static class NoOpREHandler implements RejectedExecutionHandler {
1754	>	public static class NoOpREHandler implements RejectedExecutionHandler {
1755		public void rejectedExecution(Runnable r,
1756		ThreadPoolExecutor executor) {}
1757		}
1758
1759	+	/**
1760	+	* A CyclicBarrier that uses timed await and fails with
1761	+	* AssertionFailedErrors instead of throwing checked exceptions.
1762	+	*/
1763	+	public static class CheckedBarrier extends CyclicBarrier {
1764	+	public CheckedBarrier(int parties) { super(parties); }
1765	+
1766	+	public int await() {
1767	+	try {
1768	+	return super.await(2 * LONG_DELAY_MS, MILLISECONDS);
1769	+	} catch (TimeoutException timedOut) {
1770	+	throw new AssertionFailedError("timed out");
1771	+	} catch (Exception fail) {
1772	+	AssertionFailedError afe =
1773	+	new AssertionFailedError("Unexpected exception: " + fail);
1774	+	afe.initCause(fail);
1775	+	throw afe;
1776	+	}
1777	+	}
1778	+	}
1779	+
1780	+	void checkEmpty(BlockingQueue q) {
1781	+	try {
1782	+	assertTrue(q.isEmpty());
1783	+	assertEquals(0, q.size());
1784	+	assertNull(q.peek());
1785	+	assertNull(q.poll());
1786	+	assertNull(q.poll(0, MILLISECONDS));
1787	+	assertEquals(q.toString(), "[]");
1788	+	assertTrue(Arrays.equals(q.toArray(), new Object[0]));
1789	+	assertFalse(q.iterator().hasNext());
1790	+	try {
1791	+	q.element();
1792	+	shouldThrow();
1793	+	} catch (NoSuchElementException success) {}
1794	+	try {
1795	+	q.iterator().next();
1796	+	shouldThrow();
1797	+	} catch (NoSuchElementException success) {}
1798	+	try {
1799	+	q.remove();
1800	+	shouldThrow();
1801	+	} catch (NoSuchElementException success) {}
1802	+	} catch (InterruptedException fail) { threadUnexpectedException(fail); }
1803	+	}
1804	+
1805	+	void assertSerialEquals(Object x, Object y) {
1806	+	assertTrue(Arrays.equals(serialBytes(x), serialBytes(y)));
1807	+	}
1808	+
1809	+	void assertNotSerialEquals(Object x, Object y) {
1810	+	assertFalse(Arrays.equals(serialBytes(x), serialBytes(y)));
1811	+	}
1812	+
1813	+	byte[] serialBytes(Object o) {
1814	+	try {
1815	+	ByteArrayOutputStream bos = new ByteArrayOutputStream();
1816	+	ObjectOutputStream oos = new ObjectOutputStream(bos);
1817	+	oos.writeObject(o);
1818	+	oos.flush();
1819	+	oos.close();
1820	+	return bos.toByteArray();
1821	+	} catch (Throwable fail) {
1822	+	threadUnexpectedException(fail);
1823	+	return new byte[0];
1824	+	}
1825	+	}
1826	+
1827	+	@SuppressWarnings("unchecked")
1828	+	<T> T serialClone(T o) {
1829	+	try {
1830	+	ObjectInputStream ois = new ObjectInputStream
1831	+	(new ByteArrayInputStream(serialBytes(o)));
1832	+	T clone = (T) ois.readObject();
1833	+	assertSame(o.getClass(), clone.getClass());
1834	+	return clone;
1835	+	} catch (Throwable fail) {
1836	+	threadUnexpectedException(fail);
1837	+	return null;
1838	+	}
1839	+	}
1840	+
1841	+	public void assertThrows(Class<? extends Throwable> expectedExceptionClass,
1842	+	Runnable... throwingActions) {
1843	+	for (Runnable throwingAction : throwingActions) {
1844	+	boolean threw = false;
1845	+	try { throwingAction.run(); }
1846	+	catch (Throwable t) {
1847	+	threw = true;
1848	+	if (!expectedExceptionClass.isInstance(t)) {
1849	+	AssertionFailedError afe =
1850	+	new AssertionFailedError
1851	+	("Expected " + expectedExceptionClass.getName() +
1852	+	", got " + t.getClass().getName());
1853	+	afe.initCause(t);
1854	+	threadUnexpectedException(afe);
1855	+	}
1856	+	}
1857	+	if (!threw)
1858	+	shouldThrow(expectedExceptionClass.getName());
1859	+	}
1860	+	}
1861	+
1862	+	public void assertIteratorExhausted(Iterator<?> it) {
1863	+	try {
1864	+	it.next();
1865	+	shouldThrow();
1866	+	} catch (NoSuchElementException success) {}
1867	+	assertFalse(it.hasNext());
1868	+	}
1869	+
1870	+	public <T> Callable<T> callableThrowing(final Exception ex) {
1871	+	return new Callable<T>() { public T call() throws Exception { throw ex; }};
1872	+	}
1873	+
1874	+	public Runnable runnableThrowing(final RuntimeException ex) {
1875	+	return new Runnable() { public void run() { throw ex; }};
1876	+	}
1877	+
1878	+	/** A reusable thread pool to be shared by tests. */
1879	+	static final ExecutorService cachedThreadPool =
1880	+	new ThreadPoolExecutor(0, Integer.MAX_VALUE,
1881	+	1000L, MILLISECONDS,
1882	+	new SynchronousQueue<Runnable>());
1883	+
1884	+	static <T> void shuffle(T[] array) {
1885	+	Collections.shuffle(Arrays.asList(array), ThreadLocalRandom.current());
1886	+	}
1887		}

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