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

Comparing jsr166/src/test/tck/JSR166TestCase.java (file contents):
Revision 1.19 by dl, Sat Jan 10 20:37:20 2004 UTC vs.
Revision 1.218 by jsr166, Sun Jan 29 20:19:00 2017 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
5	<	* Other contributors include Andrew Wright, Jeffrey Hayes,
6	<	* Pat Fisher, Mike Judd.
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	>	/*
10	>	* @test
11	>	* @summary JSR-166 tck tests (conformance testing mode)
12	>	* @build *
13	>	* @modules java.management
14	>	* @run junit/othervm/timeout=1000 JSR166TestCase
15	>	*/
16	>
17	>	/*
18	>	* @test
19	>	* @summary JSR-166 tck tests (whitebox tests allowed)
20	>	* @build *
21	>	* @modules java.base/java.util.concurrent:open
22	>	*          java.base/java.lang:open
23	>	*          java.management
24	>	* @run junit/othervm/timeout=1000
25	>	*      -Djsr166.testImplementationDetails=true
26	>	*      JSR166TestCase
27	>	* @run junit/othervm/timeout=1000
28	>	*      -Djsr166.testImplementationDetails=true
29	>	*      -Djava.util.concurrent.ForkJoinPool.common.parallelism=0
30	>	*      JSR166TestCase
31	>	* @run junit/othervm/timeout=1000
32	>	*      -Djsr166.testImplementationDetails=true
33	>	*      -Djava.util.concurrent.ForkJoinPool.common.parallelism=1
34	>	*      -Djava.util.secureRandomSeed=true
35	>	*      JSR166TestCase
36	>	* @run junit/othervm/timeout=1000/policy=tck.policy
37	>	*      -Djsr166.testImplementationDetails=true
38	>	*      JSR166TestCase
39	>	*/
40	>
41	>	import static java.util.concurrent.TimeUnit.MILLISECONDS;
42	>	import static java.util.concurrent.TimeUnit.MINUTES;
43	>	import static java.util.concurrent.TimeUnit.NANOSECONDS;
44	>
45	>	import java.io.ByteArrayInputStream;
46	>	import java.io.ByteArrayOutputStream;
47	>	import java.io.ObjectInputStream;
48	>	import java.io.ObjectOutputStream;
49	>	import java.lang.management.ManagementFactory;
50	>	import java.lang.management.ThreadInfo;
51	>	import java.lang.management.ThreadMXBean;
52	>	import java.lang.reflect.Constructor;
53	>	import java.lang.reflect.Method;
54	>	import java.lang.reflect.Modifier;
55	>	import java.nio.file.Files;
56	>	import java.nio.file.Paths;
57	>	import java.security.CodeSource;
58	>	import java.security.Permission;
59	>	import java.security.PermissionCollection;
60	>	import java.security.Permissions;
61	>	import java.security.Policy;
62	>	import java.security.ProtectionDomain;
63	>	import java.security.SecurityPermission;
64	>	import java.util.ArrayList;
65	>	import java.util.Arrays;
66	>	import java.util.Collection;
67	>	import java.util.Collections;
68	>	import java.util.Date;
69	>	import java.util.Enumeration;
70	>	import java.util.Iterator;
71	>	import java.util.List;
72	>	import java.util.NoSuchElementException;
73	>	import java.util.PropertyPermission;
74	>	import java.util.concurrent.BlockingQueue;
75	>	import java.util.concurrent.Callable;
76	>	import java.util.concurrent.CountDownLatch;
77	>	import java.util.concurrent.CyclicBarrier;
78	>	import java.util.concurrent.ExecutionException;
79	>	import java.util.concurrent.Executors;
80	>	import java.util.concurrent.ExecutorService;
81	>	import java.util.concurrent.ForkJoinPool;
82	>	import java.util.concurrent.Future;
83	>	import java.util.concurrent.RecursiveAction;
84	>	import java.util.concurrent.RecursiveTask;
85	>	import java.util.concurrent.RejectedExecutionHandler;
86	>	import java.util.concurrent.Semaphore;
87	>	import java.util.concurrent.SynchronousQueue;
88	>	import java.util.concurrent.ThreadFactory;
89	>	import java.util.concurrent.ThreadLocalRandom;
90	>	import java.util.concurrent.ThreadPoolExecutor;
91	>	import java.util.concurrent.TimeoutException;
92	>	import java.util.concurrent.atomic.AtomicBoolean;
93	>	import java.util.concurrent.atomic.AtomicReference;
94	>	import java.util.regex.Matcher;
95	>	import java.util.regex.Pattern;
96	>
97	>	import junit.framework.AssertionFailedError;
98	>	import junit.framework.Test;
99	>	import junit.framework.TestCase;
100	>	import junit.framework.TestResult;
101	>	import junit.framework.TestSuite;
102
103		/**
104		* Base class for JSR166 Junit TCK tests.  Defines some constants,
105		* utility methods and classes, as well as a simple framework for
106		* helping to make sure that assertions failing in generated threads
107		* cause the associated test that generated them to itself fail (which
108	<	* JUnit doe not otherwise arrange).  The rules for creating such
108	>	* JUnit does not otherwise arrange).  The rules for creating such
109		* tests are:
110		*
111		* <ol>
112		*
113	<	* <li> All assertions in code running in generated threads must use
114	<	* the forms {@link #threadFail} , {@link #threadAssertTrue} {@link
113	>	* <li>All assertions in code running in generated threads must use
114	>	* the forms {@link #threadFail}, {@link #threadAssertTrue}, {@link
115		* #threadAssertEquals}, or {@link #threadAssertNull}, (not
116	<	* <tt>fail</tt>, <tt>assertTrue</tt>, etc.) It is OK (but not
116	>	* {@code fail}, {@code assertTrue}, etc.) It is OK (but not
117		* particularly recommended) for other code to use these forms too.
118		* Only the most typically used JUnit assertion methods are defined
119	<	* this way, but enough to live with.</li>
119	>	* this way, but enough to live with.
120		*
121	<	* <li> If you override {@link #setUp} or {@link #tearDown}, make sure
122	<	* to invoke <tt>super.setUp</tt> and <tt>super.tearDown</tt> within
121	>	* <li>If you override {@link #setUp} or {@link #tearDown}, make sure
122	>	* to invoke {@code super.setUp} and {@code super.tearDown} within
123		* them. These methods are used to clear and check for thread
124	<	* assertion failures.</li>
124	>	* assertion failures.
125		*
126	<	* <li>All delays and timeouts must use one of the constants <tt>
127	<	* SHORT_DELAY_MS</tt>, <tt> SMALL_DELAY_MS</tt>, <tt> MEDIUM_DELAY_MS</tt>,
128	<	* <tt> LONG_DELAY_MS</tt>. The idea here is that a SHORT is always
126	>	* <li>All delays and timeouts must use one of the constants {@code
127	>	* SHORT_DELAY_MS}, {@code SMALL_DELAY_MS}, {@code MEDIUM_DELAY_MS},
128	>	* {@code LONG_DELAY_MS}. The idea here is that a SHORT is always
129		* discriminable from zero time, and always allows enough time for the
130		* small amounts of computation (creating a thread, calling a few
131		* methods, etc) needed to reach a timeout point. Similarly, a SMALL
132		* is always discriminable as larger than SHORT and smaller than
133		* MEDIUM.  And so on. These constants are set to conservative values,
134		* but even so, if there is ever any doubt, they can all be increased
135	<	* in one spot to rerun tests on slower platforms</li>
135	>	* in one spot to rerun tests on slower platforms.
136		*
137	<	* <li> All threads generated must be joined inside each test case
138	<	* method (or <tt>fail</tt> to do so) before returning from the
139	<	* method. The <tt> joinPool</tt> method can be used to do this when
140	<	* using Executors.</li>
137	>	* <li>All threads generated must be joined inside each test case
138	>	* method (or {@code fail} to do so) before returning from the
139	>	* method. The {@code joinPool} method can be used to do this when
140	>	* using Executors.
141		*
142		* </ol>
143		*
144	<	* <p> <b>Other notes</b>
144	>	* <p><b>Other notes</b>
145		* <ul>
146		*
147	<	* <li> Usually, there is one testcase method per JSR166 method
147	>	* <li>Usually, there is one testcase method per JSR166 method
148		* covering "normal" operation, and then as many exception-testing
149		* methods as there are exceptions the method can throw. Sometimes
150		* there are multiple tests per JSR166 method when the different
151		* "normal" behaviors differ significantly. And sometimes testcases
152	<	* cover multiple methods when they cannot be tested in
153	<	* isolation.</li>
154	<	*
67	<	* <li> The documentation style for testcases is to provide as javadoc
152	>	* cover multiple methods when they cannot be tested in isolation.
153	>	*
154	>	* <li>The documentation style for testcases is to provide as javadoc
155		* a simple sentence or two describing the property that the testcase
156		* method purports to test. The javadocs do not say anything about how
157	<	* the property is tested. To find out, read the code.</li>
157	>	* the property is tested. To find out, read the code.
158		*
159	<	* <li> These tests are "conformance tests", and do not attempt to
159	>	* <li>These tests are "conformance tests", and do not attempt to
160		* test throughput, latency, scalability or other performance factors
161		* (see the separate "jtreg" tests for a set intended to check these
162		* for the most central aspects of functionality.) So, most tests use
163		* the smallest sensible numbers of threads, collection sizes, etc
164	<	* needed to check basic conformance.</li>
164	>	* needed to check basic conformance.
165		*
166		* <li>The test classes currently do not declare inclusion in
167		* any particular package to simplify things for people integrating
168	<	* them in TCK test suites.</li>
168	>	* them in TCK test suites.
169		*
170	<	* <li> As a convenience, the <tt>main</tt> of this class (JSR166TestCase)
171	<	* runs all JSR166 unit tests.</li>
170	>	* <li>As a convenience, the {@code main} of this class (JSR166TestCase)
171	>	* runs all JSR166 unit tests.
172		*
173		* </ul>
174		*/
175		public class JSR166TestCase extends TestCase {
176	+	private static final boolean useSecurityManager =
177	+	Boolean.getBoolean("jsr166.useSecurityManager");
178	+
179	+	protected static final boolean expensiveTests =
180	+	Boolean.getBoolean("jsr166.expensiveTests");
181	+
182	+	/**
183	+	* If true, also run tests that are not part of the official tck
184	+	* because they test unspecified implementation details.
185	+	*/
186	+	protected static final boolean testImplementationDetails =
187	+	Boolean.getBoolean("jsr166.testImplementationDetails");
188	+
189	+	/**
190	+	* If true, report on stdout all "slow" tests, that is, ones that
191	+	* take more than profileThreshold milliseconds to execute.
192	+	*/
193	+	private static final boolean profileTests =
194	+	Boolean.getBoolean("jsr166.profileTests");
195	+
196	+	/**
197	+	* The number of milliseconds that tests are permitted for
198	+	* execution without being reported, when profileTests is set.
199	+	*/
200	+	private static final long profileThreshold =
201	+	Long.getLong("jsr166.profileThreshold", 100);
202	+
203	+	/**
204	+	* The number of repetitions per test (for tickling rare bugs).
205	+	*/
206	+	private static final int runsPerTest =
207	+	Integer.getInteger("jsr166.runsPerTest", 1);
208	+
209	+	/**
210	+	* The number of repetitions of the test suite (for finding leaks?).
211	+	*/
212	+	private static final int suiteRuns =
213	+	Integer.getInteger("jsr166.suiteRuns", 1);
214	+
215	+	/**
216	+	* Returns the value of the system property, or NaN if not defined.
217	+	*/
218	+	private static float systemPropertyValue(String name) {
219	+	String floatString = System.getProperty(name);
220	+	if (floatString == null)
221	+	return Float.NaN;
222	+	try {
223	+	return Float.parseFloat(floatString);
224	+	} catch (NumberFormatException ex) {
225	+	throw new IllegalArgumentException(
226	+	String.format("Bad float value in system property %s=%s",
227	+	name, floatString));
228	+	}
229	+	}
230	+
231	+	/**
232	+	* The scaling factor to apply to standard delays used in tests.
233	+	* May be initialized from any of:
234	+	* - the "jsr166.delay.factor" system property
235	+	* - the "test.timeout.factor" system property (as used by jtreg)
236	+	*   See: http://openjdk.java.net/jtreg/tag-spec.html
237	+	* - hard-coded fuzz factor when using a known slowpoke VM
238	+	*/
239	+	private static final float delayFactor = delayFactor();
240	+
241	+	private static float delayFactor() {
242	+	float x;
243	+	if (!Float.isNaN(x = systemPropertyValue("jsr166.delay.factor")))
244	+	return x;
245	+	if (!Float.isNaN(x = systemPropertyValue("test.timeout.factor")))
246	+	return x;
247	+	String prop = System.getProperty("java.vm.version");
248	+	if (prop != null && prop.matches(".*debug.*"))
249	+	return 4.0f; // How much slower is fastdebug than product?!
250	+	return 1.0f;
251	+	}
252	+
253	+	public JSR166TestCase() { super(); }
254	+	public JSR166TestCase(String name) { super(name); }
255	+
256	+	/**
257	+	* A filter for tests to run, matching strings of the form
258	+	* methodName(className), e.g. "testInvokeAll5(ForkJoinPoolTest)"
259	+	* Usefully combined with jsr166.runsPerTest.
260	+	*/
261	+	private static final Pattern methodFilter = methodFilter();
262	+
263	+	private static Pattern methodFilter() {
264	+	String regex = System.getProperty("jsr166.methodFilter");
265	+	return (regex == null) ? null : Pattern.compile(regex);
266	+	}
267	+
268	+	// Instrumentation to debug very rare, but very annoying hung test runs.
269	+	static volatile TestCase currentTestCase;
270	+	// static volatile int currentRun = 0;
271	+	static {
272	+	Runnable checkForWedgedTest = new Runnable() { public void run() {
273	+	// Avoid spurious reports with enormous runsPerTest.
274	+	// A single test case run should never take more than 1 second.
275	+	// But let's cap it at the high end too ...
276	+	final int timeoutMinutes =
277	+	Math.min(15, Math.max(runsPerTest / 60, 1));
278	+	for (TestCase lastTestCase = currentTestCase;;) {
279	+	try { MINUTES.sleep(timeoutMinutes); }
280	+	catch (InterruptedException unexpected) { break; }
281	+	if (lastTestCase == currentTestCase) {
282	+	System.err.printf(
283	+	"Looks like we're stuck running test: %s%n",
284	+	lastTestCase);
285	+	//                     System.err.printf(
286	+	//                         "Looks like we're stuck running test: %s (%d/%d)%n",
287	+	//                         lastTestCase, currentRun, runsPerTest);
288	+	//                     System.err.println("availableProcessors=" +
289	+	//                         Runtime.getRuntime().availableProcessors());
290	+	//                     System.err.printf("cpu model = %s%n", cpuModel());
291	+	dumpTestThreads();
292	+	// one stack dump is probably enough; more would be spam
293	+	break;
294	+	}
295	+	lastTestCase = currentTestCase;
296	+	}}};
297	+	Thread thread = new Thread(checkForWedgedTest, "checkForWedgedTest");
298	+	thread.setDaemon(true);
299	+	thread.start();
300	+	}
301	+
302	+	//     public static String cpuModel() {
303	+	//         try {
304	+	//             Matcher matcher = Pattern.compile("model name\\s*: (.*)")
305	+	//                 .matcher(new String(
306	+	//                      Files.readAllBytes(Paths.get("/proc/cpuinfo")), "UTF-8"));
307	+	//             matcher.find();
308	+	//             return matcher.group(1);
309	+	//         } catch (Exception ex) { return null; }
310	+	//     }
311	+
312	+	public void runBare() throws Throwable {
313	+	currentTestCase = this;
314	+	if (methodFilter == null
315	+	|| methodFilter.matcher(toString()).find())
316	+	super.runBare();
317	+	}
318	+
319	+	protected void runTest() throws Throwable {
320	+	for (int i = 0; i < runsPerTest; i++) {
321	+	// currentRun = i;
322	+	if (profileTests)
323	+	runTestProfiled();
324	+	else
325	+	super.runTest();
326	+	}
327	+	}
328	+
329	+	protected void runTestProfiled() throws Throwable {
330	+	for (int i = 0; i < 2; i++) {
331	+	long startTime = System.nanoTime();
332	+	super.runTest();
333	+	long elapsedMillis = millisElapsedSince(startTime);
334	+	if (elapsedMillis < profileThreshold)
335	+	break;
336	+	// Never report first run of any test; treat it as a
337	+	// warmup run, notably to trigger all needed classloading,
338	+	if (i > 0)
339	+	System.out.printf("%n%s: %d%n", toString(), elapsedMillis);
340	+	}
341	+	}
342	+
343	+	/**
344	+	* Runs all JSR166 unit tests using junit.textui.TestRunner.
345	+	*/
346	+	public static void main(String[] args) {
347	+	main(suite(), args);
348	+	}
349	+
350	+	static class PithyResultPrinter extends junit.textui.ResultPrinter {
351	+	PithyResultPrinter(java.io.PrintStream writer) { super(writer); }
352	+	long runTime;
353	+	public void startTest(Test test) {}
354	+	protected void printHeader(long runTime) {
355	+	this.runTime = runTime; // defer printing for later
356	+	}
357	+	protected void printFooter(TestResult result) {
358	+	if (result.wasSuccessful()) {
359	+	getWriter().println("OK (" + result.runCount() + " tests)"
360	+	+ "  Time: " + elapsedTimeAsString(runTime));
361	+	} else {
362	+	getWriter().println("Time: " + elapsedTimeAsString(runTime));
363	+	super.printFooter(result);
364	+	}
365	+	}
366	+	}
367	+
368		/**
369	<	* Runs all JSR166 unit tests using junit.textui.TestRunner
370	<	*/
371	<	public static void main (String[] args) {
372	<	int iters = 1;
373	<	if (args.length > 0)
374	<	iters = Integer.parseInt(args[0]);
375	<	Test s = suite();
97	<	for (int i = 0; i < iters; ++i)
98	<	junit.textui.TestRunner.run (s);
369	>	* Returns a TestRunner that doesn't bother with unnecessary
370	>	* fluff, like printing a "." for each test case.
371	>	*/
372	>	static junit.textui.TestRunner newPithyTestRunner() {
373	>	junit.textui.TestRunner runner = new junit.textui.TestRunner();
374	>	runner.setPrinter(new PithyResultPrinter(System.out));
375	>	return runner;
376		}
377
378		/**
379	<	* Collects all JSR166 unit tests as one suite
380	<	*/
381	<	public static Test suite ( ) {
382	<	TestSuite suite = new TestSuite("JSR166 Unit Tests");
383	<
384	<	suite.addTest(new TestSuite(AbstractExecutorServiceTest.class));
385	<	suite.addTest(new TestSuite(AbstractQueueTest.class));
386	<	suite.addTest(new TestSuite(AbstractQueuedSynchronizerTest.class));
387	<	suite.addTest(new TestSuite(ArrayBlockingQueueTest.class));
388	<	suite.addTest(new TestSuite(AtomicBooleanTest.class));
389	<	suite.addTest(new TestSuite(AtomicIntegerArrayTest.class));
390	<	suite.addTest(new TestSuite(AtomicIntegerFieldUpdaterTest.class));
391	<	suite.addTest(new TestSuite(AtomicIntegerTest.class));
392	<	suite.addTest(new TestSuite(AtomicLongArrayTest.class));
393	<	suite.addTest(new TestSuite(AtomicLongFieldUpdaterTest.class));
394	<	suite.addTest(new TestSuite(AtomicLongTest.class));
395	<	suite.addTest(new TestSuite(AtomicMarkableReferenceTest.class));
396	<	suite.addTest(new TestSuite(AtomicReferenceArrayTest.class));
397	<	suite.addTest(new TestSuite(AtomicReferenceFieldUpdaterTest.class));
398	<	suite.addTest(new TestSuite(AtomicReferenceTest.class));
399	<	suite.addTest(new TestSuite(AtomicStampedReferenceTest.class));
400	<	suite.addTest(new TestSuite(ConcurrentHashMapTest.class));
401	<	suite.addTest(new TestSuite(ConcurrentLinkedQueueTest.class));
402	<	suite.addTest(new TestSuite(CopyOnWriteArrayListTest.class));
403	<	suite.addTest(new TestSuite(CopyOnWriteArraySetTest.class));
404	<	suite.addTest(new TestSuite(CountDownLatchTest.class));
405	<	suite.addTest(new TestSuite(CyclicBarrierTest.class));
406	<	suite.addTest(new TestSuite(DelayQueueTest.class));
130	<	suite.addTest(new TestSuite(ExchangerTest.class));
131	<	suite.addTest(new TestSuite(ExecutorsTest.class));
132	<	suite.addTest(new TestSuite(ExecutorCompletionServiceTest.class));
133	<	suite.addTest(new TestSuite(FutureTaskTest.class));
134	<	suite.addTest(new TestSuite(LinkedBlockingQueueTest.class));
135	<	suite.addTest(new TestSuite(LinkedListTest.class));
136	<	suite.addTest(new TestSuite(LockSupportTest.class));
137	<	suite.addTest(new TestSuite(PriorityBlockingQueueTest.class));
138	<	suite.addTest(new TestSuite(PriorityQueueTest.class));
139	<	suite.addTest(new TestSuite(ReentrantLockTest.class));
140	<	suite.addTest(new TestSuite(ReentrantReadWriteLockTest.class));
141	<	suite.addTest(new TestSuite(ScheduledExecutorTest.class));
142	<	suite.addTest(new TestSuite(SemaphoreTest.class));
143	<	suite.addTest(new TestSuite(SynchronousQueueTest.class));
144	<	suite.addTest(new TestSuite(SystemTest.class));
145	<	suite.addTest(new TestSuite(ThreadLocalTest.class));
146	<	suite.addTest(new TestSuite(ThreadPoolExecutorTest.class));
147	<	suite.addTest(new TestSuite(ThreadTest.class));
148	<	suite.addTest(new TestSuite(TimeUnitTest.class));
149	<
379	>	* Runs all unit tests in the given test suite.
380	>	* Actual behavior influenced by jsr166.* system properties.
381	>	*/
382	>	static void main(Test suite, String[] args) {
383	>	if (useSecurityManager) {
384	>	System.err.println("Setting a permissive security manager");
385	>	Policy.setPolicy(permissivePolicy());
386	>	System.setSecurityManager(new SecurityManager());
387	>	}
388	>	for (int i = 0; i < suiteRuns; i++) {
389	>	TestResult result = newPithyTestRunner().doRun(suite);
390	>	if (!result.wasSuccessful())
391	>	System.exit(1);
392	>	System.gc();
393	>	System.runFinalization();
394	>	}
395	>	}
396	>
397	>	public static TestSuite newTestSuite(Object... suiteOrClasses) {
398	>	TestSuite suite = new TestSuite();
399	>	for (Object suiteOrClass : suiteOrClasses) {
400	>	if (suiteOrClass instanceof TestSuite)
401	>	suite.addTest((TestSuite) suiteOrClass);
402	>	else if (suiteOrClass instanceof Class)
403	>	suite.addTest(new TestSuite((Class<?>) suiteOrClass));
404	>	else
405	>	throw new ClassCastException("not a test suite or class");
406	>	}
407		return suite;
408		}
409
410	+	public static void addNamedTestClasses(TestSuite suite,
411	+	String... testClassNames) {
412	+	for (String testClassName : testClassNames) {
413	+	try {
414	+	Class<?> testClass = Class.forName(testClassName);
415	+	Method m = testClass.getDeclaredMethod("suite",
416	+	new Class<?>[0]);
417	+	suite.addTest(newTestSuite((Test)m.invoke(null)));
418	+	} catch (Exception e) {
419	+	throw new Error("Missing test class", e);
420	+	}
421	+	}
422	+	}
423	+
424	+	public static final double JAVA_CLASS_VERSION;
425	+	public static final String JAVA_SPECIFICATION_VERSION;
426	+	static {
427	+	try {
428	+	JAVA_CLASS_VERSION = java.security.AccessController.doPrivileged(
429	+	new java.security.PrivilegedAction<Double>() {
430	+	public Double run() {
431	+	return Double.valueOf(System.getProperty("java.class.version"));}});
432	+	JAVA_SPECIFICATION_VERSION = java.security.AccessController.doPrivileged(
433	+	new java.security.PrivilegedAction<String>() {
434	+	public String run() {
435	+	return System.getProperty("java.specification.version");}});
436	+	} catch (Throwable t) {
437	+	throw new Error(t);
438	+	}
439	+	}
440	+
441	+	public static boolean atLeastJava6() { return JAVA_CLASS_VERSION >= 50.0; }
442	+	public static boolean atLeastJava7() { return JAVA_CLASS_VERSION >= 51.0; }
443	+	public static boolean atLeastJava8() { return JAVA_CLASS_VERSION >= 52.0; }
444	+	public static boolean atLeastJava9() {
445	+	return JAVA_CLASS_VERSION >= 53.0
446	+	// As of 2015-09, java9 still uses 52.0 class file version
447	+	|| JAVA_SPECIFICATION_VERSION.matches("^(1\\.)?(9|[0-9][0-9])$");
448	+	}
449	+	public static boolean atLeastJava10() {
450	+	return JAVA_CLASS_VERSION >= 54.0
451	+	|| JAVA_SPECIFICATION_VERSION.matches("^(1\\.)?[0-9][0-9]$");
452	+	}
453	+
454	+	/**
455	+	* Collects all JSR166 unit tests as one suite.
456	+	*/
457	+	public static Test suite() {
458	+	// Java7+ test classes
459	+	TestSuite suite = newTestSuite(
460	+	ForkJoinPoolTest.suite(),
461	+	ForkJoinTaskTest.suite(),
462	+	RecursiveActionTest.suite(),
463	+	RecursiveTaskTest.suite(),
464	+	LinkedTransferQueueTest.suite(),
465	+	PhaserTest.suite(),
466	+	ThreadLocalRandomTest.suite(),
467	+	AbstractExecutorServiceTest.suite(),
468	+	AbstractQueueTest.suite(),
469	+	AbstractQueuedSynchronizerTest.suite(),
470	+	AbstractQueuedLongSynchronizerTest.suite(),
471	+	ArrayBlockingQueueTest.suite(),
472	+	ArrayDequeTest.suite(),
473	+	ArrayListTest.suite(),
474	+	AtomicBooleanTest.suite(),
475	+	AtomicIntegerArrayTest.suite(),
476	+	AtomicIntegerFieldUpdaterTest.suite(),
477	+	AtomicIntegerTest.suite(),
478	+	AtomicLongArrayTest.suite(),
479	+	AtomicLongFieldUpdaterTest.suite(),
480	+	AtomicLongTest.suite(),
481	+	AtomicMarkableReferenceTest.suite(),
482	+	AtomicReferenceArrayTest.suite(),
483	+	AtomicReferenceFieldUpdaterTest.suite(),
484	+	AtomicReferenceTest.suite(),
485	+	AtomicStampedReferenceTest.suite(),
486	+	ConcurrentHashMapTest.suite(),
487	+	ConcurrentLinkedDequeTest.suite(),
488	+	ConcurrentLinkedQueueTest.suite(),
489	+	ConcurrentSkipListMapTest.suite(),
490	+	ConcurrentSkipListSubMapTest.suite(),
491	+	ConcurrentSkipListSetTest.suite(),
492	+	ConcurrentSkipListSubSetTest.suite(),
493	+	CopyOnWriteArrayListTest.suite(),
494	+	CopyOnWriteArraySetTest.suite(),
495	+	CountDownLatchTest.suite(),
496	+	CountedCompleterTest.suite(),
497	+	CyclicBarrierTest.suite(),
498	+	DelayQueueTest.suite(),
499	+	EntryTest.suite(),
500	+	ExchangerTest.suite(),
501	+	ExecutorsTest.suite(),
502	+	ExecutorCompletionServiceTest.suite(),
503	+	FutureTaskTest.suite(),
504	+	LinkedBlockingDequeTest.suite(),
505	+	LinkedBlockingQueueTest.suite(),
506	+	LinkedListTest.suite(),
507	+	LockSupportTest.suite(),
508	+	PriorityBlockingQueueTest.suite(),
509	+	PriorityQueueTest.suite(),
510	+	ReentrantLockTest.suite(),
511	+	ReentrantReadWriteLockTest.suite(),
512	+	ScheduledExecutorTest.suite(),
513	+	ScheduledExecutorSubclassTest.suite(),
514	+	SemaphoreTest.suite(),
515	+	SynchronousQueueTest.suite(),
516	+	SystemTest.suite(),
517	+	ThreadLocalTest.suite(),
518	+	ThreadPoolExecutorTest.suite(),
519	+	ThreadPoolExecutorSubclassTest.suite(),
520	+	ThreadTest.suite(),
521	+	TimeUnitTest.suite(),
522	+	TreeMapTest.suite(),
523	+	TreeSetTest.suite(),
524	+	TreeSubMapTest.suite(),
525	+	TreeSubSetTest.suite(),
526	+	VectorTest.suite());
527	+
528	+	// Java8+ test classes
529	+	if (atLeastJava8()) {
530	+	String[] java8TestClassNames = {
531	+	"ArrayDeque8Test",
532	+	"Atomic8Test",
533	+	"CompletableFutureTest",
534	+	"ConcurrentHashMap8Test",
535	+	"CountedCompleter8Test",
536	+	"DoubleAccumulatorTest",
537	+	"DoubleAdderTest",
538	+	"ForkJoinPool8Test",
539	+	"ForkJoinTask8Test",
540	+	"LinkedBlockingDeque8Test",
541	+	"LinkedBlockingQueue8Test",
542	+	"LongAccumulatorTest",
543	+	"LongAdderTest",
544	+	"SplittableRandomTest",
545	+	"StampedLockTest",
546	+	"SubmissionPublisherTest",
547	+	"ThreadLocalRandom8Test",
548	+	"TimeUnit8Test",
549	+	};
550	+	addNamedTestClasses(suite, java8TestClassNames);
551	+	}
552	+
553	+	// Java9+ test classes
554	+	if (atLeastJava9()) {
555	+	String[] java9TestClassNames = {
556	+	"AtomicBoolean9Test",
557	+	"AtomicInteger9Test",
558	+	"AtomicIntegerArray9Test",
559	+	"AtomicLong9Test",
560	+	"AtomicLongArray9Test",
561	+	"AtomicReference9Test",
562	+	"AtomicReferenceArray9Test",
563	+	"ExecutorCompletionService9Test",
564	+	"ForkJoinPool9Test",
565	+	};
566	+	addNamedTestClasses(suite, java9TestClassNames);
567	+	}
568	+
569	+	return suite;
570	+	}
571	+
572	+	/** Returns list of junit-style test method names in given class. */
573	+	public static ArrayList<String> testMethodNames(Class<?> testClass) {
574	+	Method[] methods = testClass.getDeclaredMethods();
575	+	ArrayList<String> names = new ArrayList<>(methods.length);
576	+	for (Method method : methods) {
577	+	if (method.getName().startsWith("test")
578	+	&& Modifier.isPublic(method.getModifiers())
579	+	// method.getParameterCount() requires jdk8+
580	+	&& method.getParameterTypes().length == 0) {
581	+	names.add(method.getName());
582	+	}
583	+	}
584	+	return names;
585	+	}
586	+
587	+	/**
588	+	* Returns junit-style testSuite for the given test class, but
589	+	* parameterized by passing extra data to each test.
590	+	*/
591	+	public static <ExtraData> Test parameterizedTestSuite
592	+	(Class<? extends JSR166TestCase> testClass,
593	+	Class<ExtraData> dataClass,
594	+	ExtraData data) {
595	+	try {
596	+	TestSuite suite = new TestSuite();
597	+	Constructor c =
598	+	testClass.getDeclaredConstructor(dataClass, String.class);
599	+	for (String methodName : testMethodNames(testClass))
600	+	suite.addTest((Test) c.newInstance(data, methodName));
601	+	return suite;
602	+	} catch (Exception e) {
603	+	throw new Error(e);
604	+	}
605	+	}
606	+
607	+	/**
608	+	* Returns junit-style testSuite for the jdk8 extension of the
609	+	* given test class, but parameterized by passing extra data to
610	+	* each test.  Uses reflection to allow compilation in jdk7.
611	+	*/
612	+	public static <ExtraData> Test jdk8ParameterizedTestSuite
613	+	(Class<? extends JSR166TestCase> testClass,
614	+	Class<ExtraData> dataClass,
615	+	ExtraData data) {
616	+	if (atLeastJava8()) {
617	+	String name = testClass.getName();
618	+	String name8 = name.replaceAll("Test$", "8Test");
619	+	if (name.equals(name8)) throw new Error(name);
620	+	try {
621	+	return (Test)
622	+	Class.forName(name8)
623	+	.getMethod("testSuite", new Class[] { dataClass })
624	+	.invoke(null, data);
625	+	} catch (Exception e) {
626	+	throw new Error(e);
627	+	}
628	+	} else {
629	+	return new TestSuite();
630	+	}
631	+	}
632	+
633	+	// Delays for timing-dependent tests, in milliseconds.
634
635		public static long SHORT_DELAY_MS;
636		public static long SMALL_DELAY_MS;
637		public static long MEDIUM_DELAY_MS;
638		public static long LONG_DELAY_MS;
639
159	–
640		/**
641	<	* Return the shortest timed delay. This could
642	<	* be reimplemented to use for example a Property.
643	<	*/
641	>	* Returns the shortest timed delay. This can be scaled up for
642	>	* slow machines using the jsr166.delay.factor system property,
643	>	* or via jtreg's -timeoutFactor: flag.
644	>	* http://openjdk.java.net/jtreg/command-help.html
645	>	*/
646		protected long getShortDelay() {
647	<	return 10;
647	>	return (long) (50 * delayFactor);
648		}
649
168	–
650		/**
651	<	* Set delays as multiples of SHORT_DELAY.
651	>	* Sets delays as multiples of SHORT_DELAY.
652		*/
653	<	protected  void setDelays() {
653	>	protected void setDelays() {
654		SHORT_DELAY_MS = getShortDelay();
655	<	SMALL_DELAY_MS = SHORT_DELAY_MS * 5;
655	>	SMALL_DELAY_MS  = SHORT_DELAY_MS * 5;
656		MEDIUM_DELAY_MS = SHORT_DELAY_MS * 10;
657	<	LONG_DELAY_MS = SHORT_DELAY_MS * 50;
657	>	LONG_DELAY_MS   = SHORT_DELAY_MS * 200;
658		}
659
660		/**
661	<	* Flag set true if any threadAssert methods fail
661	>	* Returns a timeout in milliseconds to be used in tests that
662	>	* verify that operations block or time out.
663		*/
664	<	volatile boolean threadFailed;
664	>	long timeoutMillis() {
665	>	return SHORT_DELAY_MS / 4;
666	>	}
667
668		/**
669	<	* Initialize test to indicate that no thread assertions have failed
669	>	* Returns a new Date instance representing a time at least
670	>	* delayMillis milliseconds in the future.
671		*/
672	<	public void setUp() {
672	>	Date delayedDate(long delayMillis) {
673	>	// Add 1 because currentTimeMillis is known to round into the past.
674	>	return new Date(System.currentTimeMillis() + delayMillis + 1);
675	>	}
676	>
677	>	/**
678	>	* The first exception encountered if any threadAssertXXX method fails.
679	>	*/
680	>	private final AtomicReference<Throwable> threadFailure
681	>	= new AtomicReference<>(null);
682	>
683	>	/**
684	>	* Records an exception so that it can be rethrown later in the test
685	>	* harness thread, triggering a test case failure.  Only the first
686	>	* failure is recorded; subsequent calls to this method from within
687	>	* the same test have no effect.
688	>	*/
689	>	public void threadRecordFailure(Throwable t) {
690	>	System.err.println(t);
691	>	dumpTestThreads();
692	>	threadFailure.compareAndSet(null, t);
693	>	}
694	>
695	>	public void setUp() {
696		setDelays();
697	<	threadFailed = false;
697	>	}
698	>
699	>	void tearDownFail(String format, Object... args) {
700	>	String msg = toString() + ": " + String.format(format, args);
701	>	System.err.println(msg);
702	>	dumpTestThreads();
703	>	throw new AssertionFailedError(msg);
704	>	}
705	>
706	>	/**
707	>	* Extra checks that get done for all test cases.
708	>	*
709	>	* Triggers test case failure if any thread assertions have failed,
710	>	* by rethrowing, in the test harness thread, any exception recorded
711	>	* earlier by threadRecordFailure.
712	>	*
713	>	* Triggers test case failure if interrupt status is set in the main thread.
714	>	*/
715	>	public void tearDown() throws Exception {
716	>	Throwable t = threadFailure.getAndSet(null);
717	>	if (t != null) {
718	>	if (t instanceof Error)
719	>	throw (Error) t;
720	>	else if (t instanceof RuntimeException)
721	>	throw (RuntimeException) t;
722	>	else if (t instanceof Exception)
723	>	throw (Exception) t;
724	>	else {
725	>	AssertionFailedError afe =
726	>	new AssertionFailedError(t.toString());
727	>	afe.initCause(t);
728	>	throw afe;
729	>	}
730	>	}
731	>
732	>	if (Thread.interrupted())
733	>	tearDownFail("interrupt status set in main thread");
734	>
735	>	checkForkJoinPoolThreadLeaks();
736		}
737
738		/**
739	<	* Trigger test case failure if any thread assertions have failed
739	>	* Finds missing PoolCleaners
740		*/
741	<	public void tearDown() {
742	<	assertFalse(threadFailed);
741	>	void checkForkJoinPoolThreadLeaks() throws InterruptedException {
742	>	Thread[] survivors = new Thread[7];
743	>	int count = Thread.enumerate(survivors);
744	>	for (int i = 0; i < count; i++) {
745	>	Thread thread = survivors[i];
746	>	String name = thread.getName();
747	>	if (name.startsWith("ForkJoinPool-")) {
748	>	// give thread some time to terminate
749	>	thread.join(LONG_DELAY_MS);
750	>	if (thread.isAlive())
751	>	tearDownFail("Found leaked ForkJoinPool thread thread=%s",
752	>	thread);
753	>	}
754	>	}
755	>
756	>	if (!ForkJoinPool.commonPool()
757	>	.awaitQuiescence(LONG_DELAY_MS, MILLISECONDS))
758	>	tearDownFail("ForkJoin common pool thread stuck");
759		}
760
761		/**
762	<	* Fail, also setting status to indicate current testcase should fail
763	<	*/
762	>	* Just like fail(reason), but additionally recording (using
763	>	* threadRecordFailure) any AssertionFailedError thrown, so that
764	>	* the current testcase will fail.
765	>	*/
766		public void threadFail(String reason) {
767	<	threadFailed = true;
768	<	fail(reason);
767	>	try {
768	>	fail(reason);
769	>	} catch (AssertionFailedError t) {
770	>	threadRecordFailure(t);
771	>	throw t;
772	>	}
773		}
774
775		/**
776	<	* If expression not true, set status to indicate current testcase
777	<	* should fail
778	<	*/
776	>	* Just like assertTrue(b), but additionally recording (using
777	>	* threadRecordFailure) any AssertionFailedError thrown, so that
778	>	* the current testcase will fail.
779	>	*/
780		public void threadAssertTrue(boolean b) {
781	<	if (!b) {
213	<	threadFailed = true;
781	>	try {
782		assertTrue(b);
783	+	} catch (AssertionFailedError t) {
784	+	threadRecordFailure(t);
785	+	throw t;
786		}
787		}
788
789		/**
790	<	* If expression not false, set status to indicate current testcase
791	<	* should fail
792	<	*/
790	>	* Just like assertFalse(b), but additionally recording (using
791	>	* threadRecordFailure) any AssertionFailedError thrown, so that
792	>	* the current testcase will fail.
793	>	*/
794		public void threadAssertFalse(boolean b) {
795	<	if (b) {
224	<	threadFailed = true;
795	>	try {
796		assertFalse(b);
797	+	} catch (AssertionFailedError t) {
798	+	threadRecordFailure(t);
799	+	throw t;
800		}
801		}
802
803		/**
804	<	* If argument not null, set status to indicate current testcase
805	<	* should fail
806	<	*/
804	>	* Just like assertNull(x), but additionally recording (using
805	>	* threadRecordFailure) any AssertionFailedError thrown, so that
806	>	* the current testcase will fail.
807	>	*/
808		public void threadAssertNull(Object x) {
809	<	if (x != null) {
235	<	threadFailed = true;
809	>	try {
810		assertNull(x);
811	+	} catch (AssertionFailedError t) {
812	+	threadRecordFailure(t);
813	+	throw t;
814		}
815		}
816
817		/**
818	<	* If arguments not equal, set status to indicate current testcase
819	<	* should fail
820	<	*/
818	>	* Just like assertEquals(x, y), but additionally recording (using
819	>	* threadRecordFailure) any AssertionFailedError thrown, so that
820	>	* the current testcase will fail.
821	>	*/
822		public void threadAssertEquals(long x, long y) {
823	<	if (x != y) {
246	<	threadFailed = true;
823	>	try {
824		assertEquals(x, y);
825	+	} catch (AssertionFailedError t) {
826	+	threadRecordFailure(t);
827	+	throw t;
828		}
829		}
830
831		/**
832	<	* If arguments not equal, set status to indicate current testcase
833	<	* should fail
834	<	*/
832	>	* Just like assertEquals(x, y), but additionally recording (using
833	>	* threadRecordFailure) any AssertionFailedError thrown, so that
834	>	* the current testcase will fail.
835	>	*/
836		public void threadAssertEquals(Object x, Object y) {
837	<	if (x != y && (x == null || !x.equals(y))) {
257	<	threadFailed = true;
837	>	try {
838		assertEquals(x, y);
839	+	} catch (AssertionFailedError fail) {
840	+	threadRecordFailure(fail);
841	+	throw fail;
842	+	} catch (Throwable fail) {
843	+	threadUnexpectedException(fail);
844	+	}
845	+	}
846	+
847	+	/**
848	+	* Just like assertSame(x, y), but additionally recording (using
849	+	* threadRecordFailure) any AssertionFailedError thrown, so that
850	+	* the current testcase will fail.
851	+	*/
852	+	public void threadAssertSame(Object x, Object y) {
853	+	try {
854	+	assertSame(x, y);
855	+	} catch (AssertionFailedError fail) {
856	+	threadRecordFailure(fail);
857	+	throw fail;
858		}
859		}
860
861		/**
862	<	* threadFail with message "should throw exception"
863	<	*/
862	>	* Calls threadFail with message "should throw exception".
863	>	*/
864		public void threadShouldThrow() {
865	<	threadFailed = true;
866	<	fail("should throw exception");
865	>	threadFail("should throw exception");
866	>	}
867	>
868	>	/**
869	>	* Calls threadFail with message "should throw" + exceptionName.
870	>	*/
871	>	public void threadShouldThrow(String exceptionName) {
872	>	threadFail("should throw " + exceptionName);
873	>	}
874	>
875	>	/**
876	>	* Records the given exception using {@link #threadRecordFailure},
877	>	* then rethrows the exception, wrapping it in an
878	>	* AssertionFailedError if necessary.
879	>	*/
880	>	public void threadUnexpectedException(Throwable t) {
881	>	threadRecordFailure(t);
882	>	t.printStackTrace();
883	>	if (t instanceof RuntimeException)
884	>	throw (RuntimeException) t;
885	>	else if (t instanceof Error)
886	>	throw (Error) t;
887	>	else {
888	>	AssertionFailedError afe =
889	>	new AssertionFailedError("unexpected exception: " + t);
890	>	afe.initCause(t);
891	>	throw afe;
892	>	}
893	>	}
894	>
895	>	/**
896	>	* Delays, via Thread.sleep, for the given millisecond delay, but
897	>	* if the sleep is shorter than specified, may re-sleep or yield
898	>	* until time elapses.  Ensures that the given time, as measured
899	>	* by System.nanoTime(), has elapsed.
900	>	*/
901	>	static void delay(long millis) throws InterruptedException {
902	>	long nanos = millis * (1000 * 1000);
903	>	final long wakeupTime = System.nanoTime() + nanos;
904	>	do {
905	>	if (millis > 0L)
906	>	Thread.sleep(millis);
907	>	else // too short to sleep
908	>	Thread.yield();
909	>	nanos = wakeupTime - System.nanoTime();
910	>	millis = nanos / (1000 * 1000);
911	>	} while (nanos >= 0L);
912		}
913
914		/**
915	<	* threadFail with message "Unexpected exception"
915	>	* Allows use of try-with-resources with per-test thread pools.
916		*/
917	<	public void threadUnexpectedException() {
918	<	threadFailed = true;
919	<	fail("Unexpected exception");
917	>	class PoolCleaner implements AutoCloseable {
918	>	private final ExecutorService pool;
919	>	public PoolCleaner(ExecutorService pool) { this.pool = pool; }
920	>	public void close() { joinPool(pool); }
921	>	}
922	>
923	>	/**
924	>	* An extension of PoolCleaner that has an action to release the pool.
925	>	*/
926	>	class PoolCleanerWithReleaser extends PoolCleaner {
927	>	private final Runnable releaser;
928	>	public PoolCleanerWithReleaser(ExecutorService pool, Runnable releaser) {
929	>	super(pool);
930	>	this.releaser = releaser;
931	>	}
932	>	public void close() {
933	>	try {
934	>	releaser.run();
935	>	} finally {
936	>	super.close();
937	>	}
938	>	}
939	>	}
940	>
941	>	PoolCleaner cleaner(ExecutorService pool) {
942	>	return new PoolCleaner(pool);
943	>	}
944	>
945	>	PoolCleaner cleaner(ExecutorService pool, Runnable releaser) {
946	>	return new PoolCleanerWithReleaser(pool, releaser);
947	>	}
948	>
949	>	PoolCleaner cleaner(ExecutorService pool, CountDownLatch latch) {
950	>	return new PoolCleanerWithReleaser(pool, releaser(latch));
951	>	}
952	>
953	>	Runnable releaser(final CountDownLatch latch) {
954	>	return new Runnable() { public void run() {
955	>	do { latch.countDown(); }
956	>	while (latch.getCount() > 0);
957	>	}};
958		}
959
960	+	PoolCleaner cleaner(ExecutorService pool, AtomicBoolean flag) {
961	+	return new PoolCleanerWithReleaser(pool, releaser(flag));
962	+	}
963	+
964	+	Runnable releaser(final AtomicBoolean flag) {
965	+	return new Runnable() { public void run() { flag.set(true); }};
966	+	}
967
968		/**
969	<	* Wait out termination of a thread pool or fail doing so
969	>	* Waits out termination of a thread pool or fails doing so.
970		*/
971	<	public void joinPool(ExecutorService exec) {
971	>	void joinPool(ExecutorService pool) {
972		try {
973	<	exec.shutdown();
974	<	assertTrue(exec.awaitTermination(LONG_DELAY_MS, TimeUnit.MILLISECONDS));
975	<	} catch(InterruptedException ie) {
976	<	fail("Unexpected exception");
973	>	pool.shutdown();
974	>	if (!pool.awaitTermination(2 * LONG_DELAY_MS, MILLISECONDS)) {
975	>	try {
976	>	threadFail("ExecutorService " + pool +
977	>	" did not terminate in a timely manner");
978	>	} finally {
979	>	// last resort, for the benefit of subsequent tests
980	>	pool.shutdownNow();
981	>	pool.awaitTermination(MEDIUM_DELAY_MS, MILLISECONDS);
982	>	}
983	>	}
984	>	} catch (SecurityException ok) {
985	>	// Allowed in case test doesn't have privs
986	>	} catch (InterruptedException fail) {
987	>	threadFail("Unexpected InterruptedException");
988		}
989		}
990
991	+	/**
992	+	* Like Runnable, but with the freedom to throw anything.
993	+	* junit folks had the same idea:
994	+	* http://junit.org/junit5/docs/snapshot/api/org/junit/gen5/api/Executable.html
995	+	*/
996	+	interface Action { public void run() throws Throwable; }
997	+
998	+	/**
999	+	* Runs all the given actions in parallel, failing if any fail.
1000	+	* Useful for running multiple variants of tests that are
1001	+	* necessarily individually slow because they must block.
1002	+	*/
1003	+	void testInParallel(Action ... actions) {
1004	+	ExecutorService pool = Executors.newCachedThreadPool();
1005	+	try (PoolCleaner cleaner = cleaner(pool)) {
1006	+	ArrayList<Future<?>> futures = new ArrayList<>(actions.length);
1007	+	for (final Action action : actions)
1008	+	futures.add(pool.submit(new CheckedRunnable() {
1009	+	public void realRun() throws Throwable { action.run();}}));
1010	+	for (Future<?> future : futures)
1011	+	try {
1012	+	assertNull(future.get(LONG_DELAY_MS, MILLISECONDS));
1013	+	} catch (ExecutionException ex) {
1014	+	threadUnexpectedException(ex.getCause());
1015	+	} catch (Exception ex) {
1016	+	threadUnexpectedException(ex);
1017	+	}
1018	+	}
1019	+	}
1020	+
1021	+	/**
1022	+	* A debugging tool to print stack traces of most threads, as jstack does.
1023	+	* Uninteresting threads are filtered out.
1024	+	*/
1025	+	static void dumpTestThreads() {
1026	+	SecurityManager sm = System.getSecurityManager();
1027	+	if (sm != null) {
1028	+	try {
1029	+	System.setSecurityManager(null);
1030	+	} catch (SecurityException giveUp) {
1031	+	return;
1032	+	}
1033	+	}
1034	+
1035	+	ThreadMXBean threadMXBean = ManagementFactory.getThreadMXBean();
1036	+	System.err.println("------ stacktrace dump start ------");
1037	+	for (ThreadInfo info : threadMXBean.dumpAllThreads(true, true)) {
1038	+	final String name = info.getThreadName();
1039	+	String lockName;
1040	+	if ("Signal Dispatcher".equals(name))
1041	+	continue;
1042	+	if ("Reference Handler".equals(name)
1043	+	&& (lockName = info.getLockName()) != null
1044	+	&& lockName.startsWith("java.lang.ref.Reference$Lock"))
1045	+	continue;
1046	+	if ("Finalizer".equals(name)
1047	+	&& (lockName = info.getLockName()) != null
1048	+	&& lockName.startsWith("java.lang.ref.ReferenceQueue$Lock"))
1049	+	continue;
1050	+	if ("checkForWedgedTest".equals(name))
1051	+	continue;
1052	+	System.err.print(info);
1053	+	}
1054	+	System.err.println("------ stacktrace dump end ------");
1055	+
1056	+	if (sm != null) System.setSecurityManager(sm);
1057	+	}
1058	+
1059	+	/**
1060	+	* Checks that thread does not terminate within the default
1061	+	* millisecond delay of {@code timeoutMillis()}.
1062	+	*/
1063	+	void assertThreadStaysAlive(Thread thread) {
1064	+	assertThreadStaysAlive(thread, timeoutMillis());
1065	+	}
1066	+
1067	+	/**
1068	+	* Checks that thread does not terminate within the given millisecond delay.
1069	+	*/
1070	+	void assertThreadStaysAlive(Thread thread, long millis) {
1071	+	try {
1072	+	// No need to optimize the failing case via Thread.join.
1073	+	delay(millis);
1074	+	assertTrue(thread.isAlive());
1075	+	} catch (InterruptedException fail) {
1076	+	threadFail("Unexpected InterruptedException");
1077	+	}
1078	+	}
1079
1080		/**
1081	<	* fail with message "should throw exception"
1082	<	*/
1081	>	* Checks that the threads do not terminate within the default
1082	>	* millisecond delay of {@code timeoutMillis()}.
1083	>	*/
1084	>	void assertThreadsStayAlive(Thread... threads) {
1085	>	assertThreadsStayAlive(timeoutMillis(), threads);
1086	>	}
1087	>
1088	>	/**
1089	>	* Checks that the threads do not terminate within the given millisecond delay.
1090	>	*/
1091	>	void assertThreadsStayAlive(long millis, Thread... threads) {
1092	>	try {
1093	>	// No need to optimize the failing case via Thread.join.
1094	>	delay(millis);
1095	>	for (Thread thread : threads)
1096	>	assertTrue(thread.isAlive());
1097	>	} catch (InterruptedException fail) {
1098	>	threadFail("Unexpected InterruptedException");
1099	>	}
1100	>	}
1101	>
1102	>	/**
1103	>	* Checks that future.get times out, with the default timeout of
1104	>	* {@code timeoutMillis()}.
1105	>	*/
1106	>	void assertFutureTimesOut(Future future) {
1107	>	assertFutureTimesOut(future, timeoutMillis());
1108	>	}
1109	>
1110	>	/**
1111	>	* Checks that future.get times out, with the given millisecond timeout.
1112	>	*/
1113	>	void assertFutureTimesOut(Future future, long timeoutMillis) {
1114	>	long startTime = System.nanoTime();
1115	>	try {
1116	>	future.get(timeoutMillis, MILLISECONDS);
1117	>	shouldThrow();
1118	>	} catch (TimeoutException success) {
1119	>	} catch (Exception fail) {
1120	>	threadUnexpectedException(fail);
1121	>	} finally { future.cancel(true); }
1122	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
1123	>	}
1124	>
1125	>	/**
1126	>	* Fails with message "should throw exception".
1127	>	*/
1128		public void shouldThrow() {
1129		fail("Should throw exception");
1130		}
1131
1132		/**
1133	<	* fail with message "Unexpected exception"
1133	>	* Fails with message "should throw " + exceptionName.
1134		*/
1135	<	public void unexpectedException() {
1136	<	fail("Unexpected exception");
1135	>	public void shouldThrow(String exceptionName) {
1136	>	fail("Should throw " + exceptionName);
1137		}
1138
306	–
1139		/**
1140		* The number of elements to place in collections, arrays, etc.
1141		*/
1142	<	static final int SIZE = 20;
1142	>	public static final int SIZE = 20;
1143
1144		// Some convenient Integer constants
1145
1146	<	static final Integer zero = new Integer(0);
1147	<	static final Integer one = new Integer(1);
1148	<	static final Integer two = new Integer(2);
1149	<	static final Integer three  = new Integer(3);
1150	<	static final Integer four  = new Integer(4);
1151	<	static final Integer five  = new Integer(5);
1152	<	static final Integer six = new Integer(6);
1153	<	static final Integer seven = new Integer(7);
1154	<	static final Integer eight = new Integer(8);
1155	<	static final Integer nine = new Integer(9);
1156	<	static final Integer m1  = new Integer(-1);
1157	<	static final Integer m2  = new Integer(-2);
1158	<	static final Integer m3  = new Integer(-3);
1159	<	static final Integer m4 = new Integer(-4);
1160	<	static final Integer m5 = new Integer(-5);
1161	<	static final Integer m10 = new Integer(-10);
1146	>	public static final Integer zero  = new Integer(0);
1147	>	public static final Integer one   = new Integer(1);
1148	>	public static final Integer two   = new Integer(2);
1149	>	public static final Integer three = new Integer(3);
1150	>	public static final Integer four  = new Integer(4);
1151	>	public static final Integer five  = new Integer(5);
1152	>	public static final Integer six   = new Integer(6);
1153	>	public static final Integer seven = new Integer(7);
1154	>	public static final Integer eight = new Integer(8);
1155	>	public static final Integer nine  = new Integer(9);
1156	>	public static final Integer m1  = new Integer(-1);
1157	>	public static final Integer m2  = new Integer(-2);
1158	>	public static final Integer m3  = new Integer(-3);
1159	>	public static final Integer m4  = new Integer(-4);
1160	>	public static final Integer m5  = new Integer(-5);
1161	>	public static final Integer m6  = new Integer(-6);
1162	>	public static final Integer m10 = new Integer(-10);
1163	>
1164	>	/**
1165	>	* Runs Runnable r with a security policy that permits precisely
1166	>	* the specified permissions.  If there is no current security
1167	>	* manager, the runnable is run twice, both with and without a
1168	>	* security manager.  We require that any security manager permit
1169	>	* getPolicy/setPolicy.
1170	>	*/
1171	>	public void runWithPermissions(Runnable r, Permission... permissions) {
1172	>	SecurityManager sm = System.getSecurityManager();
1173	>	if (sm == null) {
1174	>	r.run();
1175	>	}
1176	>	runWithSecurityManagerWithPermissions(r, permissions);
1177	>	}
1178
1179	+	/**
1180	+	* Runs Runnable r with a security policy that permits precisely
1181	+	* the specified permissions.  If there is no current security
1182	+	* manager, a temporary one is set for the duration of the
1183	+	* Runnable.  We require that any security manager permit
1184	+	* getPolicy/setPolicy.
1185	+	*/
1186	+	public void runWithSecurityManagerWithPermissions(Runnable r,
1187	+	Permission... permissions) {
1188	+	SecurityManager sm = System.getSecurityManager();
1189	+	if (sm == null) {
1190	+	Policy savedPolicy = Policy.getPolicy();
1191	+	try {
1192	+	Policy.setPolicy(permissivePolicy());
1193	+	System.setSecurityManager(new SecurityManager());
1194	+	runWithSecurityManagerWithPermissions(r, permissions);
1195	+	} finally {
1196	+	System.setSecurityManager(null);
1197	+	Policy.setPolicy(savedPolicy);
1198	+	}
1199	+	} else {
1200	+	Policy savedPolicy = Policy.getPolicy();
1201	+	AdjustablePolicy policy = new AdjustablePolicy(permissions);
1202	+	Policy.setPolicy(policy);
1203	+
1204	+	try {
1205	+	r.run();
1206	+	} finally {
1207	+	policy.addPermission(new SecurityPermission("setPolicy"));
1208	+	Policy.setPolicy(savedPolicy);
1209	+	}
1210	+	}
1211	+	}
1212	+
1213	+	/**
1214	+	* Runs a runnable without any permissions.
1215	+	*/
1216	+	public void runWithoutPermissions(Runnable r) {
1217	+	runWithPermissions(r);
1218	+	}
1219
1220		/**
1221		* A security policy where new permissions can be dynamically added
1222		* or all cleared.
1223		*/
1224	<	static class AdjustablePolicy extends java.security.Policy {
1224	>	public static class AdjustablePolicy extends java.security.Policy {
1225		Permissions perms = new Permissions();
1226	<	AdjustablePolicy() { }
1226	>	AdjustablePolicy(Permission... permissions) {
1227	>	for (Permission permission : permissions)
1228	>	perms.add(permission);
1229	>	}
1230		void addPermission(Permission perm) { perms.add(perm); }
1231		void clearPermissions() { perms = new Permissions(); }
1232	<	public PermissionCollection getPermissions(CodeSource cs) {
1233	<	return perms;
1234	<	}
1235	<	public PermissionCollection getPermissions(ProtectionDomain pd) {
1236	<	return perms;
1237	<	}
1238	<	public boolean implies(ProtectionDomain pd, Permission p) {
1239	<	return perms.implies(p);
1240	<	}
1241	<	public void refresh() {}
1232	>	public PermissionCollection getPermissions(CodeSource cs) {
1233	>	return perms;
1234	>	}
1235	>	public PermissionCollection getPermissions(ProtectionDomain pd) {
1236	>	return perms;
1237	>	}
1238	>	public boolean implies(ProtectionDomain pd, Permission p) {
1239	>	return perms.implies(p);
1240	>	}
1241	>	public void refresh() {}
1242	>	public String toString() {
1243	>	List<Permission> ps = new ArrayList<>();
1244	>	for (Enumeration<Permission> e = perms.elements(); e.hasMoreElements();)
1245	>	ps.add(e.nextElement());
1246	>	return "AdjustablePolicy with permissions " + ps;
1247	>	}
1248		}
1249
1250	+	/**
1251	+	* Returns a policy containing all the permissions we ever need.
1252	+	*/
1253	+	public static Policy permissivePolicy() {
1254	+	return new AdjustablePolicy
1255	+	// Permissions j.u.c. needs directly
1256	+	(new RuntimePermission("modifyThread"),
1257	+	new RuntimePermission("getClassLoader"),
1258	+	new RuntimePermission("setContextClassLoader"),
1259	+	// Permissions needed to change permissions!
1260	+	new SecurityPermission("getPolicy"),
1261	+	new SecurityPermission("setPolicy"),
1262	+	new RuntimePermission("setSecurityManager"),
1263	+	// Permissions needed by the junit test harness
1264	+	new RuntimePermission("accessDeclaredMembers"),
1265	+	new PropertyPermission("*", "read"),
1266	+	new java.io.FilePermission("<<ALL FILES>>", "read"));
1267	+	}
1268
1269	<	// Some convenient Runnable classes
1269	>	/**
1270	>	* Sleeps until the given time has elapsed.
1271	>	* Throws AssertionFailedError if interrupted.
1272	>	*/
1273	>	static void sleep(long millis) {
1274	>	try {
1275	>	delay(millis);
1276	>	} catch (InterruptedException fail) {
1277	>	AssertionFailedError afe =
1278	>	new AssertionFailedError("Unexpected InterruptedException");
1279	>	afe.initCause(fail);
1280	>	throw afe;
1281	>	}
1282	>	}
1283
1284	<	static class NoOpRunnable implements Runnable {
1285	<	public void run() {}
1284	>	/**
1285	>	* Spin-waits up to the specified number of milliseconds for the given
1286	>	* thread to enter a wait state: BLOCKED, WAITING, or TIMED_WAITING.
1287	>	*/
1288	>	void waitForThreadToEnterWaitState(Thread thread, long timeoutMillis) {
1289	>	long startTime = 0L;
1290	>	for (;;) {
1291	>	Thread.State s = thread.getState();
1292	>	if (s == Thread.State.BLOCKED ||
1293	>	s == Thread.State.WAITING ||
1294	>	s == Thread.State.TIMED_WAITING)
1295	>	return;
1296	>	else if (s == Thread.State.TERMINATED)
1297	>	fail("Unexpected thread termination");
1298	>	else if (startTime == 0L)
1299	>	startTime = System.nanoTime();
1300	>	else if (millisElapsedSince(startTime) > timeoutMillis) {
1301	>	threadAssertTrue(thread.isAlive());
1302	>	return;
1303	>	}
1304	>	Thread.yield();
1305	>	}
1306		}
1307
1308	<	static class NoOpCallable implements Callable {
1309	<	public Object call() { return Boolean.TRUE; }
1308	>	/**
1309	>	* Waits up to LONG_DELAY_MS for the given thread to enter a wait
1310	>	* state: BLOCKED, WAITING, or TIMED_WAITING.
1311	>	*/
1312	>	void waitForThreadToEnterWaitState(Thread thread) {
1313	>	waitForThreadToEnterWaitState(thread, LONG_DELAY_MS);
1314		}
1315
1316	<	static final String TEST_STRING = "a test string";
1316	>	/**
1317	>	* Returns the number of milliseconds since time given by
1318	>	* startNanoTime, which must have been previously returned from a
1319	>	* call to {@link System#nanoTime()}.
1320	>	*/
1321	>	static long millisElapsedSince(long startNanoTime) {
1322	>	return NANOSECONDS.toMillis(System.nanoTime() - startNanoTime);
1323	>	}
1324
1325	<	static class StringTask implements Callable<String> {
1326	<	public String call() { return TEST_STRING; }
1325	>	//     void assertTerminatesPromptly(long timeoutMillis, Runnable r) {
1326	>	//         long startTime = System.nanoTime();
1327	>	//         try {
1328	>	//             r.run();
1329	>	//         } catch (Throwable fail) { threadUnexpectedException(fail); }
1330	>	//         if (millisElapsedSince(startTime) > timeoutMillis/2)
1331	>	//             throw new AssertionFailedError("did not return promptly");
1332	>	//     }
1333	>
1334	>	//     void assertTerminatesPromptly(Runnable r) {
1335	>	//         assertTerminatesPromptly(LONG_DELAY_MS/2, r);
1336	>	//     }
1337	>
1338	>	/**
1339	>	* Checks that timed f.get() returns the expected value, and does not
1340	>	* wait for the timeout to elapse before returning.
1341	>	*/
1342	>	<T> void checkTimedGet(Future<T> f, T expectedValue, long timeoutMillis) {
1343	>	long startTime = System.nanoTime();
1344	>	try {
1345	>	assertEquals(expectedValue, f.get(timeoutMillis, MILLISECONDS));
1346	>	} catch (Throwable fail) { threadUnexpectedException(fail); }
1347	>	if (millisElapsedSince(startTime) > timeoutMillis/2)
1348	>	throw new AssertionFailedError("timed get did not return promptly");
1349		}
1350
1351	<	static class NPETask implements Callable<String> {
1352	<	public String call() { throw new NullPointerException(); }
1351	>	<T> void checkTimedGet(Future<T> f, T expectedValue) {
1352	>	checkTimedGet(f, expectedValue, LONG_DELAY_MS);
1353		}
1354
1355	<	static class CallableOne implements Callable<Integer> {
1356	<	public Integer call() { return one; }
1355	>	/**
1356	>	* Returns a new started daemon Thread running the given runnable.
1357	>	*/
1358	>	Thread newStartedThread(Runnable runnable) {
1359	>	Thread t = new Thread(runnable);
1360	>	t.setDaemon(true);
1361	>	t.start();
1362	>	return t;
1363		}
1364
1365	<	class ShortRunnable implements Runnable {
1366	<	public void run() {
1367	<	try {
1368	<	Thread.sleep(SHORT_DELAY_MS);
1369	<	}
1370	<	catch(Exception e) {
1371	<	threadUnexpectedException();
1365	>	/**
1366	>	* Waits for the specified time (in milliseconds) for the thread
1367	>	* to terminate (using {@link Thread#join(long)}), else interrupts
1368	>	* the thread (in the hope that it may terminate later) and fails.
1369	>	*/
1370	>	void awaitTermination(Thread t, long timeoutMillis) {
1371	>	try {
1372	>	t.join(timeoutMillis);
1373	>	} catch (InterruptedException fail) {
1374	>	threadUnexpectedException(fail);
1375	>	} finally {
1376	>	if (t.getState() != Thread.State.TERMINATED) {
1377	>	t.interrupt();
1378	>	threadFail("timed out waiting for thread to terminate");
1379		}
1380		}
1381		}
1382
1383	<	class ShortInterruptedRunnable implements Runnable {
1384	<	public void run() {
1383	>	/**
1384	>	* Waits for LONG_DELAY_MS milliseconds for the thread to
1385	>	* terminate (using {@link Thread#join(long)}), else interrupts
1386	>	* the thread (in the hope that it may terminate later) and fails.
1387	>	*/
1388	>	void awaitTermination(Thread t) {
1389	>	awaitTermination(t, LONG_DELAY_MS);
1390	>	}
1391	>
1392	>	// Some convenient Runnable classes
1393	>
1394	>	public abstract class CheckedRunnable implements Runnable {
1395	>	protected abstract void realRun() throws Throwable;
1396	>
1397	>	public final void run() {
1398		try {
1399	<	Thread.sleep(SHORT_DELAY_MS);
1400	<	threadShouldThrow();
1401	<	}
395	<	catch(InterruptedException success) {
1399	>	realRun();
1400	>	} catch (Throwable fail) {
1401	>	threadUnexpectedException(fail);
1402		}
1403		}
1404		}
1405
1406	<	class SmallRunnable implements Runnable {
1407	<	public void run() {
1406	>	public abstract class RunnableShouldThrow implements Runnable {
1407	>	protected abstract void realRun() throws Throwable;
1408	>
1409	>	final Class<?> exceptionClass;
1410	>
1411	>	<T extends Throwable> RunnableShouldThrow(Class<T> exceptionClass) {
1412	>	this.exceptionClass = exceptionClass;
1413	>	}
1414	>
1415	>	public final void run() {
1416		try {
1417	<	Thread.sleep(SMALL_DELAY_MS);
1418	<	}
1419	<	catch(Exception e) {
1420	<	threadUnexpectedException();
1417	>	realRun();
1418	>	threadShouldThrow(exceptionClass.getSimpleName());
1419	>	} catch (Throwable t) {
1420	>	if (! exceptionClass.isInstance(t))
1421	>	threadUnexpectedException(t);
1422		}
1423		}
1424		}
1425
1426	<	class SmallPossiblyInterruptedRunnable implements Runnable {
1427	<	public void run() {
1426	>	public abstract class ThreadShouldThrow extends Thread {
1427	>	protected abstract void realRun() throws Throwable;
1428	>
1429	>	final Class<?> exceptionClass;
1430	>
1431	>	<T extends Throwable> ThreadShouldThrow(Class<T> exceptionClass) {
1432	>	this.exceptionClass = exceptionClass;
1433	>	}
1434	>
1435	>	public final void run() {
1436		try {
1437	<	Thread.sleep(SMALL_DELAY_MS);
1438	<	}
1439	<	catch(Exception e) {
1437	>	realRun();
1438	>	threadShouldThrow(exceptionClass.getSimpleName());
1439	>	} catch (Throwable t) {
1440	>	if (! exceptionClass.isInstance(t))
1441	>	threadUnexpectedException(t);
1442		}
1443		}
1444		}
1445
1446	<	class SmallCallable implements Callable {
1447	<	public Object call() {
1446	>	public abstract class CheckedInterruptedRunnable implements Runnable {
1447	>	protected abstract void realRun() throws Throwable;
1448	>
1449	>	public final void run() {
1450		try {
1451	<	Thread.sleep(SMALL_DELAY_MS);
1452	<	}
1453	<	catch(Exception e) {
1454	<	threadUnexpectedException();
1451	>	realRun();
1452	>	threadShouldThrow("InterruptedException");
1453	>	} catch (InterruptedException success) {
1454	>	threadAssertFalse(Thread.interrupted());
1455	>	} catch (Throwable fail) {
1456	>	threadUnexpectedException(fail);
1457		}
429	–	return Boolean.TRUE;
1458		}
1459		}
1460
1461	<	class SmallInterruptedRunnable implements Runnable {
1462	<	public void run() {
1461	>	public abstract class CheckedCallable<T> implements Callable<T> {
1462	>	protected abstract T realCall() throws Throwable;
1463	>
1464	>	public final T call() {
1465		try {
1466	<	Thread.sleep(SMALL_DELAY_MS);
1467	<	threadShouldThrow();
1468	<	}
1469	<	catch(InterruptedException success) {
1466	>	return realCall();
1467	>	} catch (Throwable fail) {
1468	>	threadUnexpectedException(fail);
1469	>	return null;
1470		}
1471		}
1472		}
1473
1474	+	public abstract class CheckedInterruptedCallable<T>
1475	+	implements Callable<T> {
1476	+	protected abstract T realCall() throws Throwable;
1477
1478	<	class MediumRunnable implements Runnable {
446	<	public void run() {
1478	>	public final T call() {
1479		try {
1480	<	Thread.sleep(MEDIUM_DELAY_MS);
1481	<	}
1482	<	catch(Exception e) {
1483	<	threadUnexpectedException();
1480	>	T result = realCall();
1481	>	threadShouldThrow("InterruptedException");
1482	>	return result;
1483	>	} catch (InterruptedException success) {
1484	>	threadAssertFalse(Thread.interrupted());
1485	>	} catch (Throwable fail) {
1486	>	threadUnexpectedException(fail);
1487		}
1488	+	return null;
1489		}
1490		}
1491
1492	<	class MediumInterruptedRunnable implements Runnable {
1493	<	public void run() {
1492	>	public static class NoOpRunnable implements Runnable {
1493	>	public void run() {}
1494	>	}
1495	>
1496	>	public static class NoOpCallable implements Callable {
1497	>	public Object call() { return Boolean.TRUE; }
1498	>	}
1499	>
1500	>	public static final String TEST_STRING = "a test string";
1501	>
1502	>	public static class StringTask implements Callable<String> {
1503	>	final String value;
1504	>	public StringTask() { this(TEST_STRING); }
1505	>	public StringTask(String value) { this.value = value; }
1506	>	public String call() { return value; }
1507	>	}
1508	>
1509	>	public Callable<String> latchAwaitingStringTask(final CountDownLatch latch) {
1510	>	return new CheckedCallable<String>() {
1511	>	protected String realCall() {
1512	>	try {
1513	>	latch.await();
1514	>	} catch (InterruptedException quittingTime) {}
1515	>	return TEST_STRING;
1516	>	}};
1517	>	}
1518	>
1519	>	public Runnable countDowner(final CountDownLatch latch) {
1520	>	return new CheckedRunnable() {
1521	>	public void realRun() throws InterruptedException {
1522	>	latch.countDown();
1523	>	}};
1524	>	}
1525	>
1526	>	class LatchAwaiter extends CheckedRunnable {
1527	>	static final int NEW = 0;
1528	>	static final int RUNNING = 1;
1529	>	static final int DONE = 2;
1530	>	final CountDownLatch latch;
1531	>	int state = NEW;
1532	>	LatchAwaiter(CountDownLatch latch) { this.latch = latch; }
1533	>	public void realRun() throws InterruptedException {
1534	>	state = 1;
1535	>	await(latch);
1536	>	state = 2;
1537	>	}
1538	>	}
1539	>
1540	>	public LatchAwaiter awaiter(CountDownLatch latch) {
1541	>	return new LatchAwaiter(latch);
1542	>	}
1543	>
1544	>	public void await(CountDownLatch latch, long timeoutMillis) {
1545	>	try {
1546	>	if (!latch.await(timeoutMillis, MILLISECONDS))
1547	>	fail("timed out waiting for CountDownLatch for "
1548	>	+ (timeoutMillis/1000) + " sec");
1549	>	} catch (Throwable fail) {
1550	>	threadUnexpectedException(fail);
1551	>	}
1552	>	}
1553	>
1554	>	public void await(CountDownLatch latch) {
1555	>	await(latch, LONG_DELAY_MS);
1556	>	}
1557	>
1558	>	public void await(Semaphore semaphore) {
1559	>	try {
1560	>	if (!semaphore.tryAcquire(LONG_DELAY_MS, MILLISECONDS))
1561	>	fail("timed out waiting for Semaphore for "
1562	>	+ (LONG_DELAY_MS/1000) + " sec");
1563	>	} catch (Throwable fail) {
1564	>	threadUnexpectedException(fail);
1565	>	}
1566	>	}
1567	>
1568	>	//     /**
1569	>	//      * Spin-waits up to LONG_DELAY_MS until flag becomes true.
1570	>	//      */
1571	>	//     public void await(AtomicBoolean flag) {
1572	>	//         await(flag, LONG_DELAY_MS);
1573	>	//     }
1574	>
1575	>	//     /**
1576	>	//      * Spin-waits up to the specified timeout until flag becomes true.
1577	>	//      */
1578	>	//     public void await(AtomicBoolean flag, long timeoutMillis) {
1579	>	//         long startTime = System.nanoTime();
1580	>	//         while (!flag.get()) {
1581	>	//             if (millisElapsedSince(startTime) > timeoutMillis)
1582	>	//                 throw new AssertionFailedError("timed out");
1583	>	//             Thread.yield();
1584	>	//         }
1585	>	//     }
1586	>
1587	>	public static class NPETask implements Callable<String> {
1588	>	public String call() { throw new NullPointerException(); }
1589	>	}
1590	>
1591	>	public static class CallableOne implements Callable<Integer> {
1592	>	public Integer call() { return one; }
1593	>	}
1594	>
1595	>	public class ShortRunnable extends CheckedRunnable {
1596	>	protected void realRun() throws Throwable {
1597	>	delay(SHORT_DELAY_MS);
1598	>	}
1599	>	}
1600	>
1601	>	public class ShortInterruptedRunnable extends CheckedInterruptedRunnable {
1602	>	protected void realRun() throws InterruptedException {
1603	>	delay(SHORT_DELAY_MS);
1604	>	}
1605	>	}
1606	>
1607	>	public class SmallRunnable extends CheckedRunnable {
1608	>	protected void realRun() throws Throwable {
1609	>	delay(SMALL_DELAY_MS);
1610	>	}
1611	>	}
1612	>
1613	>	public class SmallPossiblyInterruptedRunnable extends CheckedRunnable {
1614	>	protected void realRun() {
1615		try {
1616	<	Thread.sleep(MEDIUM_DELAY_MS);
1617	<	threadShouldThrow();
461	<	}
462	<	catch(InterruptedException success) {
463	<	}
1616	>	delay(SMALL_DELAY_MS);
1617	>	} catch (InterruptedException ok) {}
1618		}
1619		}
1620
1621	<	class MediumPossiblyInterruptedRunnable implements Runnable {
1622	<	public void run() {
1621	>	public class SmallCallable extends CheckedCallable {
1622	>	protected Object realCall() throws InterruptedException {
1623	>	delay(SMALL_DELAY_MS);
1624	>	return Boolean.TRUE;
1625	>	}
1626	>	}
1627	>
1628	>	public class MediumRunnable extends CheckedRunnable {
1629	>	protected void realRun() throws Throwable {
1630	>	delay(MEDIUM_DELAY_MS);
1631	>	}
1632	>	}
1633	>
1634	>	public class MediumInterruptedRunnable extends CheckedInterruptedRunnable {
1635	>	protected void realRun() throws InterruptedException {
1636	>	delay(MEDIUM_DELAY_MS);
1637	>	}
1638	>	}
1639	>
1640	>	public Runnable possiblyInterruptedRunnable(final long timeoutMillis) {
1641	>	return new CheckedRunnable() {
1642	>	protected void realRun() {
1643	>	try {
1644	>	delay(timeoutMillis);
1645	>	} catch (InterruptedException ok) {}
1646	>	}};
1647	>	}
1648	>
1649	>	public class MediumPossiblyInterruptedRunnable extends CheckedRunnable {
1650	>	protected void realRun() {
1651		try {
1652	<	Thread.sleep(MEDIUM_DELAY_MS);
1653	<	}
472	<	catch(InterruptedException success) {
473	<	}
1652	>	delay(MEDIUM_DELAY_MS);
1653	>	} catch (InterruptedException ok) {}
1654		}
1655		}
1656
1657	<	class LongPossiblyInterruptedRunnable implements Runnable {
1658	<	public void run() {
1657	>	public class LongPossiblyInterruptedRunnable extends CheckedRunnable {
1658	>	protected void realRun() {
1659		try {
1660	<	Thread.sleep(LONG_DELAY_MS);
1661	<	}
482	<	catch(InterruptedException success) {
483	<	}
1660	>	delay(LONG_DELAY_MS);
1661	>	} catch (InterruptedException ok) {}
1662		}
1663		}
1664
1665		/**
1666		* For use as ThreadFactory in constructors
1667		*/
1668	<	static class SimpleThreadFactory implements ThreadFactory{
1669	<	public Thread newThread(Runnable r){
1668	>	public static class SimpleThreadFactory implements ThreadFactory {
1669	>	public Thread newThread(Runnable r) {
1670		return new Thread(r);
1671	<	}
1671	>	}
1672	>	}
1673	>
1674	>	public interface TrackedRunnable extends Runnable {
1675	>	boolean isDone();
1676	>	}
1677	>
1678	>	public static TrackedRunnable trackedRunnable(final long timeoutMillis) {
1679	>	return new TrackedRunnable() {
1680	>	private volatile boolean done = false;
1681	>	public boolean isDone() { return done; }
1682	>	public void run() {
1683	>	try {
1684	>	delay(timeoutMillis);
1685	>	done = true;
1686	>	} catch (InterruptedException ok) {}
1687	>	}
1688	>	};
1689		}
1690
1691	<	static class TrackedShortRunnable implements Runnable {
1692	<	volatile boolean done = false;
1691	>	public static class TrackedShortRunnable implements Runnable {
1692	>	public volatile boolean done = false;
1693		public void run() {
1694		try {
1695	<	Thread.sleep(SMALL_DELAY_MS);
1695	>	delay(SHORT_DELAY_MS);
1696		done = true;
1697	<	} catch(Exception e){
503	<	}
1697	>	} catch (InterruptedException ok) {}
1698		}
1699		}
1700
1701	<	static class TrackedMediumRunnable implements Runnable {
1702	<	volatile boolean done = false;
1701	>	public static class TrackedSmallRunnable implements Runnable {
1702	>	public volatile boolean done = false;
1703		public void run() {
1704		try {
1705	<	Thread.sleep(MEDIUM_DELAY_MS);
1705	>	delay(SMALL_DELAY_MS);
1706		done = true;
1707	<	} catch(Exception e){
514	<	}
1707	>	} catch (InterruptedException ok) {}
1708		}
1709		}
1710
1711	<	static class TrackedLongRunnable implements Runnable {
1712	<	volatile boolean done = false;
1711	>	public static class TrackedMediumRunnable implements Runnable {
1712	>	public volatile boolean done = false;
1713		public void run() {
1714		try {
1715	<	Thread.sleep(LONG_DELAY_MS);
1715	>	delay(MEDIUM_DELAY_MS);
1716		done = true;
1717	<	} catch(Exception e){
525	<	}
1717	>	} catch (InterruptedException ok) {}
1718		}
1719		}
1720
1721	<	static class TrackedNoOpRunnable implements Runnable {
1722	<	volatile boolean done = false;
1721	>	public static class TrackedLongRunnable implements Runnable {
1722	>	public volatile boolean done = false;
1723	>	public void run() {
1724	>	try {
1725	>	delay(LONG_DELAY_MS);
1726	>	done = true;
1727	>	} catch (InterruptedException ok) {}
1728	>	}
1729	>	}
1730	>
1731	>	public static class TrackedNoOpRunnable implements Runnable {
1732	>	public volatile boolean done = false;
1733		public void run() {
1734		done = true;
1735		}
1736		}
1737
1738	<	static class TrackedCallable implements Callable {
1739	<	volatile boolean done = false;
1738	>	public static class TrackedCallable implements Callable {
1739	>	public volatile boolean done = false;
1740		public Object call() {
1741		try {
1742	<	Thread.sleep(SMALL_DELAY_MS);
1742	>	delay(SMALL_DELAY_MS);
1743		done = true;
1744	<	} catch(Exception e){
543	<	}
1744	>	} catch (InterruptedException ok) {}
1745		return Boolean.TRUE;
1746		}
1747		}
1748
1749	+	/**
1750	+	* Analog of CheckedRunnable for RecursiveAction
1751	+	*/
1752	+	public abstract class CheckedRecursiveAction extends RecursiveAction {
1753	+	protected abstract void realCompute() throws Throwable;
1754	+
1755	+	@Override protected final void compute() {
1756	+	try {
1757	+	realCompute();
1758	+	} catch (Throwable fail) {
1759	+	threadUnexpectedException(fail);
1760	+	}
1761	+	}
1762	+	}
1763	+
1764	+	/**
1765	+	* Analog of CheckedCallable for RecursiveTask
1766	+	*/
1767	+	public abstract class CheckedRecursiveTask<T> extends RecursiveTask<T> {
1768	+	protected abstract T realCompute() throws Throwable;
1769	+
1770	+	@Override protected final T compute() {
1771	+	try {
1772	+	return realCompute();
1773	+	} catch (Throwable fail) {
1774	+	threadUnexpectedException(fail);
1775	+	return null;
1776	+	}
1777	+	}
1778	+	}
1779
1780		/**
1781		* For use as RejectedExecutionHandler in constructors
1782		*/
1783	<	static class NoOpREHandler implements RejectedExecutionHandler{
1784	<	public void rejectedExecution(Runnable r, ThreadPoolExecutor executor){}
1783	>	public static class NoOpREHandler implements RejectedExecutionHandler {
1784	>	public void rejectedExecution(Runnable r,
1785	>	ThreadPoolExecutor executor) {}
1786	>	}
1787	>
1788	>	/**
1789	>	* A CyclicBarrier that uses timed await and fails with
1790	>	* AssertionFailedErrors instead of throwing checked exceptions.
1791	>	*/
1792	>	public static class CheckedBarrier extends CyclicBarrier {
1793	>	public CheckedBarrier(int parties) { super(parties); }
1794	>
1795	>	public int await() {
1796	>	try {
1797	>	return super.await(2 * LONG_DELAY_MS, MILLISECONDS);
1798	>	} catch (TimeoutException timedOut) {
1799	>	throw new AssertionFailedError("timed out");
1800	>	} catch (Exception fail) {
1801	>	AssertionFailedError afe =
1802	>	new AssertionFailedError("Unexpected exception: " + fail);
1803	>	afe.initCause(fail);
1804	>	throw afe;
1805	>	}
1806	>	}
1807	>	}
1808	>
1809	>	void checkEmpty(BlockingQueue q) {
1810	>	try {
1811	>	assertTrue(q.isEmpty());
1812	>	assertEquals(0, q.size());
1813	>	assertNull(q.peek());
1814	>	assertNull(q.poll());
1815	>	assertNull(q.poll(0, MILLISECONDS));
1816	>	assertEquals(q.toString(), "[]");
1817	>	assertTrue(Arrays.equals(q.toArray(), new Object[0]));
1818	>	assertFalse(q.iterator().hasNext());
1819	>	try {
1820	>	q.element();
1821	>	shouldThrow();
1822	>	} catch (NoSuchElementException success) {}
1823	>	try {
1824	>	q.iterator().next();
1825	>	shouldThrow();
1826	>	} catch (NoSuchElementException success) {}
1827	>	try {
1828	>	q.remove();
1829	>	shouldThrow();
1830	>	} catch (NoSuchElementException success) {}
1831	>	} catch (InterruptedException fail) { threadUnexpectedException(fail); }
1832	>	}
1833	>
1834	>	void assertSerialEquals(Object x, Object y) {
1835	>	assertTrue(Arrays.equals(serialBytes(x), serialBytes(y)));
1836	>	}
1837	>
1838	>	void assertNotSerialEquals(Object x, Object y) {
1839	>	assertFalse(Arrays.equals(serialBytes(x), serialBytes(y)));
1840	>	}
1841	>
1842	>	byte[] serialBytes(Object o) {
1843	>	try {
1844	>	ByteArrayOutputStream bos = new ByteArrayOutputStream();
1845	>	ObjectOutputStream oos = new ObjectOutputStream(bos);
1846	>	oos.writeObject(o);
1847	>	oos.flush();
1848	>	oos.close();
1849	>	return bos.toByteArray();
1850	>	} catch (Throwable fail) {
1851	>	threadUnexpectedException(fail);
1852	>	return new byte[0];
1853	>	}
1854	>	}
1855	>
1856	>	void assertImmutable(final Object o) {
1857	>	if (o instanceof Collection) {
1858	>	assertThrows(
1859	>	UnsupportedOperationException.class,
1860	>	new Runnable() { public void run() {
1861	>	((Collection) o).add(null);}});
1862	>	}
1863	>	}
1864	>
1865	>	@SuppressWarnings("unchecked")
1866	>	<T> T serialClone(T o) {
1867	>	try {
1868	>	ObjectInputStream ois = new ObjectInputStream
1869	>	(new ByteArrayInputStream(serialBytes(o)));
1870	>	T clone = (T) ois.readObject();
1871	>	if (o == clone) assertImmutable(o);
1872	>	assertSame(o.getClass(), clone.getClass());
1873	>	return clone;
1874	>	} catch (Throwable fail) {
1875	>	threadUnexpectedException(fail);
1876	>	return null;
1877	>	}
1878	>	}
1879	>
1880	>	/**
1881	>	* A version of serialClone that leaves error handling (for
1882	>	* e.g. NotSerializableException) up to the caller.
1883	>	*/
1884	>	@SuppressWarnings("unchecked")
1885	>	<T> T serialClonePossiblyFailing(T o)
1886	>	throws ReflectiveOperationException, java.io.IOException {
1887	>	ByteArrayOutputStream bos = new ByteArrayOutputStream();
1888	>	ObjectOutputStream oos = new ObjectOutputStream(bos);
1889	>	oos.writeObject(o);
1890	>	oos.flush();
1891	>	oos.close();
1892	>	ObjectInputStream ois = new ObjectInputStream
1893	>	(new ByteArrayInputStream(bos.toByteArray()));
1894	>	T clone = (T) ois.readObject();
1895	>	if (o == clone) assertImmutable(o);
1896	>	assertSame(o.getClass(), clone.getClass());
1897	>	return clone;
1898	>	}
1899	>
1900	>	/**
1901	>	* If o implements Cloneable and has a public clone method,
1902	>	* returns a clone of o, else null.
1903	>	*/
1904	>	@SuppressWarnings("unchecked")
1905	>	<T> T cloneableClone(T o) {
1906	>	if (!(o instanceof Cloneable)) return null;
1907	>	final T clone;
1908	>	try {
1909	>	clone = (T) o.getClass().getMethod("clone").invoke(o);
1910	>	} catch (NoSuchMethodException ok) {
1911	>	return null;
1912	>	} catch (ReflectiveOperationException unexpected) {
1913	>	throw new Error(unexpected);
1914	>	}
1915	>	assertNotSame(o, clone); // not 100% guaranteed by spec
1916	>	assertSame(o.getClass(), clone.getClass());
1917	>	return clone;
1918	>	}
1919	>
1920	>	public void assertThrows(Class<? extends Throwable> expectedExceptionClass,
1921	>	Runnable... throwingActions) {
1922	>	for (Runnable throwingAction : throwingActions) {
1923	>	boolean threw = false;
1924	>	try { throwingAction.run(); }
1925	>	catch (Throwable t) {
1926	>	threw = true;
1927	>	if (!expectedExceptionClass.isInstance(t)) {
1928	>	AssertionFailedError afe =
1929	>	new AssertionFailedError
1930	>	("Expected " + expectedExceptionClass.getName() +
1931	>	", got " + t.getClass().getName());
1932	>	afe.initCause(t);
1933	>	threadUnexpectedException(afe);
1934	>	}
1935	>	}
1936	>	if (!threw)
1937	>	shouldThrow(expectedExceptionClass.getName());
1938	>	}
1939	>	}
1940	>
1941	>	public void assertIteratorExhausted(Iterator<?> it) {
1942	>	try {
1943	>	it.next();
1944	>	shouldThrow();
1945	>	} catch (NoSuchElementException success) {}
1946	>	assertFalse(it.hasNext());
1947	>	}
1948	>
1949	>	public <T> Callable<T> callableThrowing(final Exception ex) {
1950	>	return new Callable<T>() { public T call() throws Exception { throw ex; }};
1951	>	}
1952	>
1953	>	public Runnable runnableThrowing(final RuntimeException ex) {
1954	>	return new Runnable() { public void run() { throw ex; }};
1955	>	}
1956	>
1957	>	/** A reusable thread pool to be shared by tests. */
1958	>	static final ExecutorService cachedThreadPool =
1959	>	new ThreadPoolExecutor(0, Integer.MAX_VALUE,
1960	>	1000L, MILLISECONDS,
1961	>	new SynchronousQueue<Runnable>());
1962	>
1963	>	static <T> void shuffle(T[] array) {
1964	>	Collections.shuffle(Arrays.asList(array), ThreadLocalRandom.current());
1965		}
555	–
556	–
1966		}

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