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Comparing jsr166/src/test/tck/JSR166TestCase.java (file contents):
Revision 1.36 by jsr166, Mon Aug 3 22:08:45 2009 UTC vs.
Revision 1.220 by jsr166, Sat Mar 11 17:33:32 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
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 (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 java.io.*;
43	<	import java.security.*;
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.security.CodeSource;
56	>	import java.security.Permission;
57	>	import java.security.PermissionCollection;
58	>	import java.security.Permissions;
59	>	import java.security.Policy;
60	>	import java.security.ProtectionDomain;
61	>	import java.security.SecurityPermission;
62	>	import java.util.ArrayList;
63	>	import java.util.Arrays;
64	>	import java.util.Collection;
65	>	import java.util.Collections;
66	>	import java.util.Date;
67	>	import java.util.Enumeration;
68	>	import java.util.Iterator;
69	>	import java.util.List;
70	>	import java.util.NoSuchElementException;
71	>	import java.util.PropertyPermission;
72	>	import java.util.concurrent.BlockingQueue;
73	>	import java.util.concurrent.Callable;
74	>	import java.util.concurrent.CountDownLatch;
75	>	import java.util.concurrent.CyclicBarrier;
76	>	import java.util.concurrent.ExecutionException;
77	>	import java.util.concurrent.Executors;
78	>	import java.util.concurrent.ExecutorService;
79	>	import java.util.concurrent.ForkJoinPool;
80	>	import java.util.concurrent.Future;
81	>	import java.util.concurrent.RecursiveAction;
82	>	import java.util.concurrent.RecursiveTask;
83	>	import java.util.concurrent.RejectedExecutionHandler;
84	>	import java.util.concurrent.Semaphore;
85	>	import java.util.concurrent.SynchronousQueue;
86	>	import java.util.concurrent.ThreadFactory;
87	>	import java.util.concurrent.ThreadLocalRandom;
88	>	import java.util.concurrent.ThreadPoolExecutor;
89	>	import java.util.concurrent.TimeoutException;
90	>	import java.util.concurrent.atomic.AtomicBoolean;
91	>	import java.util.concurrent.atomic.AtomicReference;
92	>	import java.util.regex.Pattern;
93	>
94	>	import junit.framework.AssertionFailedError;
95	>	import junit.framework.Test;
96	>	import junit.framework.TestCase;
97	>	import junit.framework.TestResult;
98	>	import junit.framework.TestSuite;
99
100		/**
101		* Base class for JSR166 Junit TCK tests.  Defines some constants,
#	Line 23 | Line 107 | import java.security.*;
107		*
108		* <ol>
109		*
110	<	* <li> All assertions in code running in generated threads must use
110	>	* <li>All assertions in code running in generated threads must use
111		* the forms {@link #threadFail}, {@link #threadAssertTrue}, {@link
112		* #threadAssertEquals}, or {@link #threadAssertNull}, (not
113	<	* <tt>fail</tt>, <tt>assertTrue</tt>, etc.) It is OK (but not
113	>	* {@code fail}, {@code assertTrue}, etc.) It is OK (but not
114		* particularly recommended) for other code to use these forms too.
115		* Only the most typically used JUnit assertion methods are defined
116	<	* this way, but enough to live with.</li>
116	>	* this way, but enough to live with.
117		*
118	<	* <li> If you override {@link #setUp} or {@link #tearDown}, make sure
119	<	* to invoke <tt>super.setUp</tt> and <tt>super.tearDown</tt> within
118	>	* <li>If you override {@link #setUp} or {@link #tearDown}, make sure
119	>	* to invoke {@code super.setUp} and {@code super.tearDown} within
120		* them. These methods are used to clear and check for thread
121	<	* assertion failures.</li>
121	>	* assertion failures.
122		*
123	<	* <li>All delays and timeouts must use one of the constants <tt>
124	<	* SHORT_DELAY_MS</tt>, <tt> SMALL_DELAY_MS</tt>, <tt> MEDIUM_DELAY_MS</tt>,
125	<	* <tt> LONG_DELAY_MS</tt>. The idea here is that a SHORT is always
123	>	* <li>All delays and timeouts must use one of the constants {@code
124	>	* SHORT_DELAY_MS}, {@code SMALL_DELAY_MS}, {@code MEDIUM_DELAY_MS},
125	>	* {@code LONG_DELAY_MS}. The idea here is that a SHORT is always
126		* discriminable from zero time, and always allows enough time for the
127		* small amounts of computation (creating a thread, calling a few
128		* methods, etc) needed to reach a timeout point. Similarly, a SMALL
129		* is always discriminable as larger than SHORT and smaller than
130		* MEDIUM.  And so on. These constants are set to conservative values,
131		* but even so, if there is ever any doubt, they can all be increased
132	<	* in one spot to rerun tests on slower platforms.</li>
132	>	* in one spot to rerun tests on slower platforms.
133		*
134	<	* <li> All threads generated must be joined inside each test case
135	<	* method (or <tt>fail</tt> to do so) before returning from the
136	<	* method. The <tt> joinPool</tt> method can be used to do this when
137	<	* using Executors.</li>
134	>	* <li>All threads generated must be joined inside each test case
135	>	* method (or {@code fail} to do so) before returning from the
136	>	* method. The {@code joinPool} method can be used to do this when
137	>	* using Executors.
138		*
139		* </ol>
140		*
141	<	* <p> <b>Other notes</b>
141	>	* <p><b>Other notes</b>
142		* <ul>
143		*
144	<	* <li> Usually, there is one testcase method per JSR166 method
144	>	* <li>Usually, there is one testcase method per JSR166 method
145		* covering "normal" operation, and then as many exception-testing
146		* methods as there are exceptions the method can throw. Sometimes
147		* there are multiple tests per JSR166 method when the different
148		* "normal" behaviors differ significantly. And sometimes testcases
149	<	* cover multiple methods when they cannot be tested in
66	<	* isolation.</li>
149	>	* cover multiple methods when they cannot be tested in isolation.
150		*
151	<	* <li> The documentation style for testcases is to provide as javadoc
151	>	* <li>The documentation style for testcases is to provide as javadoc
152		* a simple sentence or two describing the property that the testcase
153		* method purports to test. The javadocs do not say anything about how
154	<	* the property is tested. To find out, read the code.</li>
154	>	* the property is tested. To find out, read the code.
155		*
156	<	* <li> These tests are "conformance tests", and do not attempt to
156	>	* <li>These tests are "conformance tests", and do not attempt to
157		* test throughput, latency, scalability or other performance factors
158		* (see the separate "jtreg" tests for a set intended to check these
159		* for the most central aspects of functionality.) So, most tests use
160		* the smallest sensible numbers of threads, collection sizes, etc
161	<	* needed to check basic conformance.</li>
161	>	* needed to check basic conformance.
162		*
163		* <li>The test classes currently do not declare inclusion in
164		* any particular package to simplify things for people integrating
165	<	* them in TCK test suites.</li>
165	>	* them in TCK test suites.
166		*
167	<	* <li> As a convenience, the <tt>main</tt> of this class (JSR166TestCase)
168	<	* runs all JSR166 unit tests.</li>
167	>	* <li>As a convenience, the {@code main} of this class (JSR166TestCase)
168	>	* runs all JSR166 unit tests.
169		*
170		* </ul>
171		*/
172		public class JSR166TestCase extends TestCase {
173	+	private static final boolean useSecurityManager =
174	+	Boolean.getBoolean("jsr166.useSecurityManager");
175	+
176	+	protected static final boolean expensiveTests =
177	+	Boolean.getBoolean("jsr166.expensiveTests");
178	+
179		/**
180	<	* Runs all JSR166 unit tests using junit.textui.TestRunner
180	>	* If true, also run tests that are not part of the official tck
181	>	* because they test unspecified implementation details.
182		*/
183	<	public static void main (String[] args) {
184	<	int iters = 1;
185	<	if (args.length > 0)
186	<	iters = Integer.parseInt(args[0]);
187	<	Test s = suite();
188	<	for (int i = 0; i < iters; ++i) {
189	<	junit.textui.TestRunner.run (s);
190	<	System.gc();
191	<	System.runFinalization();
183	>	protected static final boolean testImplementationDetails =
184	>	Boolean.getBoolean("jsr166.testImplementationDetails");
185	>
186	>	/**
187	>	* If true, report on stdout all "slow" tests, that is, ones that
188	>	* take more than profileThreshold milliseconds to execute.
189	>	*/
190	>	private static final boolean profileTests =
191	>	Boolean.getBoolean("jsr166.profileTests");
192	>
193	>	/**
194	>	* The number of milliseconds that tests are permitted for
195	>	* execution without being reported, when profileTests is set.
196	>	*/
197	>	private static final long profileThreshold =
198	>	Long.getLong("jsr166.profileThreshold", 100);
199	>
200	>	/**
201	>	* The number of repetitions per test (for tickling rare bugs).
202	>	*/
203	>	private static final int runsPerTest =
204	>	Integer.getInteger("jsr166.runsPerTest", 1);
205	>
206	>	/**
207	>	* The number of repetitions of the test suite (for finding leaks?).
208	>	*/
209	>	private static final int suiteRuns =
210	>	Integer.getInteger("jsr166.suiteRuns", 1);
211	>
212	>	/**
213	>	* Returns the value of the system property, or NaN if not defined.
214	>	*/
215	>	private static float systemPropertyValue(String name) {
216	>	String floatString = System.getProperty(name);
217	>	if (floatString == null)
218	>	return Float.NaN;
219	>	try {
220	>	return Float.parseFloat(floatString);
221	>	} catch (NumberFormatException ex) {
222	>	throw new IllegalArgumentException(
223	>	String.format("Bad float value in system property %s=%s",
224	>	name, floatString));
225	>	}
226	>	}
227	>
228	>	/**
229	>	* The scaling factor to apply to standard delays used in tests.
230	>	* May be initialized from any of:
231	>	* - the "jsr166.delay.factor" system property
232	>	* - the "test.timeout.factor" system property (as used by jtreg)
233	>	*   See: http://openjdk.java.net/jtreg/tag-spec.html
234	>	* - hard-coded fuzz factor when using a known slowpoke VM
235	>	*/
236	>	private static final float delayFactor = delayFactor();
237	>
238	>	private static float delayFactor() {
239	>	float x;
240	>	if (!Float.isNaN(x = systemPropertyValue("jsr166.delay.factor")))
241	>	return x;
242	>	if (!Float.isNaN(x = systemPropertyValue("test.timeout.factor")))
243	>	return x;
244	>	String prop = System.getProperty("java.vm.version");
245	>	if (prop != null && prop.matches(".*debug.*"))
246	>	return 4.0f; // How much slower is fastdebug than product?!
247	>	return 1.0f;
248	>	}
249	>
250	>	public JSR166TestCase() { super(); }
251	>	public JSR166TestCase(String name) { super(name); }
252	>
253	>	/**
254	>	* A filter for tests to run, matching strings of the form
255	>	* methodName(className), e.g. "testInvokeAll5(ForkJoinPoolTest)"
256	>	* Usefully combined with jsr166.runsPerTest.
257	>	*/
258	>	private static final Pattern methodFilter = methodFilter();
259	>
260	>	private static Pattern methodFilter() {
261	>	String regex = System.getProperty("jsr166.methodFilter");
262	>	return (regex == null) ? null : Pattern.compile(regex);
263	>	}
264	>
265	>	// Instrumentation to debug very rare, but very annoying hung test runs.
266	>	static volatile TestCase currentTestCase;
267	>	// static volatile int currentRun = 0;
268	>	static {
269	>	Runnable checkForWedgedTest = new Runnable() { public void run() {
270	>	// Avoid spurious reports with enormous runsPerTest.
271	>	// A single test case run should never take more than 1 second.
272	>	// But let's cap it at the high end too ...
273	>	final int timeoutMinutes =
274	>	Math.min(15, Math.max(runsPerTest / 60, 1));
275	>	for (TestCase lastTestCase = currentTestCase;;) {
276	>	try { MINUTES.sleep(timeoutMinutes); }
277	>	catch (InterruptedException unexpected) { break; }
278	>	if (lastTestCase == currentTestCase) {
279	>	System.err.printf(
280	>	"Looks like we're stuck running test: %s%n",
281	>	lastTestCase);
282	>	//                     System.err.printf(
283	>	//                         "Looks like we're stuck running test: %s (%d/%d)%n",
284	>	//                         lastTestCase, currentRun, runsPerTest);
285	>	//                     System.err.println("availableProcessors=" +
286	>	//                         Runtime.getRuntime().availableProcessors());
287	>	//                     System.err.printf("cpu model = %s%n", cpuModel());
288	>	dumpTestThreads();
289	>	// one stack dump is probably enough; more would be spam
290	>	break;
291	>	}
292	>	lastTestCase = currentTestCase;
293	>	}}};
294	>	Thread thread = new Thread(checkForWedgedTest, "checkForWedgedTest");
295	>	thread.setDaemon(true);
296	>	thread.start();
297	>	}
298	>
299	>	//     public static String cpuModel() {
300	>	//         try {
301	>	//             java.util.regex.Matcher matcher
302	>	//               = Pattern.compile("model name\\s*: (.*)")
303	>	//                 .matcher(new String(
304	>	//                     java.nio.file.Files.readAllBytes(
305	>	//                         java.nio.file.Paths.get("/proc/cpuinfo")), "UTF-8"));
306	>	//             matcher.find();
307	>	//             return matcher.group(1);
308	>	//         } catch (Exception ex) { return null; }
309	>	//     }
310	>
311	>	public void runBare() throws Throwable {
312	>	currentTestCase = this;
313	>	if (methodFilter == null
314	>	|| methodFilter.matcher(toString()).find())
315	>	super.runBare();
316	>	}
317	>
318	>	protected void runTest() throws Throwable {
319	>	for (int i = 0; i < runsPerTest; i++) {
320	>	// currentRun = i;
321	>	if (profileTests)
322	>	runTestProfiled();
323	>	else
324	>	super.runTest();
325	>	}
326	>	}
327	>
328	>	protected void runTestProfiled() throws Throwable {
329	>	for (int i = 0; i < 2; i++) {
330	>	long startTime = System.nanoTime();
331	>	super.runTest();
332	>	long elapsedMillis = millisElapsedSince(startTime);
333	>	if (elapsedMillis < profileThreshold)
334	>	break;
335	>	// Never report first run of any test; treat it as a
336	>	// warmup run, notably to trigger all needed classloading,
337	>	if (i > 0)
338	>	System.out.printf("%n%s: %d%n", toString(), elapsedMillis);
339	>	}
340	>	}
341	>
342	>	/**
343	>	* Runs all JSR166 unit tests using junit.textui.TestRunner.
344	>	*/
345	>	public static void main(String[] args) {
346	>	main(suite(), args);
347	>	}
348	>
349	>	static class PithyResultPrinter extends junit.textui.ResultPrinter {
350	>	PithyResultPrinter(java.io.PrintStream writer) { super(writer); }
351	>	long runTime;
352	>	public void startTest(Test test) {}
353	>	protected void printHeader(long runTime) {
354	>	this.runTime = runTime; // defer printing for later
355	>	}
356	>	protected void printFooter(TestResult result) {
357	>	if (result.wasSuccessful()) {
358	>	getWriter().println("OK (" + result.runCount() + " tests)"
359	>	+ "  Time: " + elapsedTimeAsString(runTime));
360	>	} else {
361	>	getWriter().println("Time: " + elapsedTimeAsString(runTime));
362	>	super.printFooter(result);
363	>	}
364		}
103	–	System.exit(0);
365		}
366
367		/**
368	<	* Collects all JSR166 unit tests as one suite
368	>	* Returns a TestRunner that doesn't bother with unnecessary
369	>	* fluff, like printing a "." for each test case.
370		*/
371	<	public static Test suite ( ) {
372	<	TestSuite suite = new TestSuite("JSR166 Unit Tests");
371	>	static junit.textui.TestRunner newPithyTestRunner() {
372	>	junit.textui.TestRunner runner = new junit.textui.TestRunner();
373	>	runner.setPrinter(new PithyResultPrinter(System.out));
374	>	return runner;
375	>	}
376
377	<	suite.addTest(new TestSuite(ForkJoinPoolTest.class));
378	<	suite.addTest(new TestSuite(ForkJoinTaskTest.class));
379	<	suite.addTest(new TestSuite(RecursiveActionTest.class));
380	<	suite.addTest(new TestSuite(RecursiveTaskTest.class));
381	<	suite.addTest(new TestSuite(LinkedTransferQueueTest.class));
382	<	suite.addTest(new TestSuite(PhaserTest.class));
383	<	suite.addTest(new TestSuite(ThreadLocalRandomTest.class));
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(AbstractQueuedLongSynchronizerTest.class));
388	<	suite.addTest(new TestSuite(ArrayBlockingQueueTest.class));
389	<	suite.addTest(new TestSuite(ArrayDequeTest.class));
390	<	suite.addTest(new TestSuite(AtomicBooleanTest.class));
391	<	suite.addTest(new TestSuite(AtomicIntegerArrayTest.class));
392	<	suite.addTest(new TestSuite(AtomicIntegerFieldUpdaterTest.class));
393	<	suite.addTest(new TestSuite(AtomicIntegerTest.class));
394	<	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));
377	>	/**
378	>	* Runs all unit tests in the given test suite.
379	>	* Actual behavior influenced by jsr166.* system properties.
380	>	*/
381	>	static void main(Test suite, String[] args) {
382	>	if (useSecurityManager) {
383	>	System.err.println("Setting a permissive security manager");
384	>	Policy.setPolicy(permissivePolicy());
385	>	System.setSecurityManager(new SecurityManager());
386	>	}
387	>	for (int i = 0; i < suiteRuns; i++) {
388	>	TestResult result = newPithyTestRunner().doRun(suite);
389	>	if (!result.wasSuccessful())
390	>	System.exit(1);
391	>	System.gc();
392	>	System.runFinalization();
393	>	}
394	>	}
395
396	+	public static TestSuite newTestSuite(Object... suiteOrClasses) {
397	+	TestSuite suite = new TestSuite();
398	+	for (Object suiteOrClass : suiteOrClasses) {
399	+	if (suiteOrClass instanceof TestSuite)
400	+	suite.addTest((TestSuite) suiteOrClass);
401	+	else if (suiteOrClass instanceof Class)
402	+	suite.addTest(new TestSuite((Class<?>) suiteOrClass));
403	+	else
404	+	throw new ClassCastException("not a test suite or class");
405	+	}
406		return suite;
407		}
408
409	+	public static void addNamedTestClasses(TestSuite suite,
410	+	String... testClassNames) {
411	+	for (String testClassName : testClassNames) {
412	+	try {
413	+	Class<?> testClass = Class.forName(testClassName);
414	+	Method m = testClass.getDeclaredMethod("suite",
415	+	new Class<?>[0]);
416	+	suite.addTest(newTestSuite((Test)m.invoke(null)));
417	+	} catch (Exception e) {
418	+	throw new Error("Missing test class", e);
419	+	}
420	+	}
421	+	}
422	+
423	+	public static final double JAVA_CLASS_VERSION;
424	+	public static final String JAVA_SPECIFICATION_VERSION;
425	+	static {
426	+	try {
427	+	JAVA_CLASS_VERSION = java.security.AccessController.doPrivileged(
428	+	new java.security.PrivilegedAction<Double>() {
429	+	public Double run() {
430	+	return Double.valueOf(System.getProperty("java.class.version"));}});
431	+	JAVA_SPECIFICATION_VERSION = java.security.AccessController.doPrivileged(
432	+	new java.security.PrivilegedAction<String>() {
433	+	public String run() {
434	+	return System.getProperty("java.specification.version");}});
435	+	} catch (Throwable t) {
436	+	throw new Error(t);
437	+	}
438	+	}
439	+
440	+	public static boolean atLeastJava6() { return JAVA_CLASS_VERSION >= 50.0; }
441	+	public static boolean atLeastJava7() { return JAVA_CLASS_VERSION >= 51.0; }
442	+	public static boolean atLeastJava8() { return JAVA_CLASS_VERSION >= 52.0; }
443	+	public static boolean atLeastJava9() {
444	+	return JAVA_CLASS_VERSION >= 53.0
445	+	// As of 2015-09, java9 still uses 52.0 class file version
446	+	|| JAVA_SPECIFICATION_VERSION.matches("^(1\\.)?(9|[0-9][0-9])$");
447	+	}
448	+	public static boolean atLeastJava10() {
449	+	return JAVA_CLASS_VERSION >= 54.0
450	+	|| JAVA_SPECIFICATION_VERSION.matches("^(1\\.)?[0-9][0-9]$");
451	+	}
452	+
453	+	/**
454	+	* Collects all JSR166 unit tests as one suite.
455	+	*/
456	+	public static Test suite() {
457	+	// Java7+ test classes
458	+	TestSuite suite = newTestSuite(
459	+	ForkJoinPoolTest.suite(),
460	+	ForkJoinTaskTest.suite(),
461	+	RecursiveActionTest.suite(),
462	+	RecursiveTaskTest.suite(),
463	+	LinkedTransferQueueTest.suite(),
464	+	PhaserTest.suite(),
465	+	ThreadLocalRandomTest.suite(),
466	+	AbstractExecutorServiceTest.suite(),
467	+	AbstractQueueTest.suite(),
468	+	AbstractQueuedSynchronizerTest.suite(),
469	+	AbstractQueuedLongSynchronizerTest.suite(),
470	+	ArrayBlockingQueueTest.suite(),
471	+	ArrayDequeTest.suite(),
472	+	ArrayListTest.suite(),
473	+	AtomicBooleanTest.suite(),
474	+	AtomicIntegerArrayTest.suite(),
475	+	AtomicIntegerFieldUpdaterTest.suite(),
476	+	AtomicIntegerTest.suite(),
477	+	AtomicLongArrayTest.suite(),
478	+	AtomicLongFieldUpdaterTest.suite(),
479	+	AtomicLongTest.suite(),
480	+	AtomicMarkableReferenceTest.suite(),
481	+	AtomicReferenceArrayTest.suite(),
482	+	AtomicReferenceFieldUpdaterTest.suite(),
483	+	AtomicReferenceTest.suite(),
484	+	AtomicStampedReferenceTest.suite(),
485	+	ConcurrentHashMapTest.suite(),
486	+	ConcurrentLinkedDequeTest.suite(),
487	+	ConcurrentLinkedQueueTest.suite(),
488	+	ConcurrentSkipListMapTest.suite(),
489	+	ConcurrentSkipListSubMapTest.suite(),
490	+	ConcurrentSkipListSetTest.suite(),
491	+	ConcurrentSkipListSubSetTest.suite(),
492	+	CopyOnWriteArrayListTest.suite(),
493	+	CopyOnWriteArraySetTest.suite(),
494	+	CountDownLatchTest.suite(),
495	+	CountedCompleterTest.suite(),
496	+	CyclicBarrierTest.suite(),
497	+	DelayQueueTest.suite(),
498	+	EntryTest.suite(),
499	+	ExchangerTest.suite(),
500	+	ExecutorsTest.suite(),
501	+	ExecutorCompletionServiceTest.suite(),
502	+	FutureTaskTest.suite(),
503	+	LinkedBlockingDequeTest.suite(),
504	+	LinkedBlockingQueueTest.suite(),
505	+	LinkedListTest.suite(),
506	+	LockSupportTest.suite(),
507	+	PriorityBlockingQueueTest.suite(),
508	+	PriorityQueueTest.suite(),
509	+	ReentrantLockTest.suite(),
510	+	ReentrantReadWriteLockTest.suite(),
511	+	ScheduledExecutorTest.suite(),
512	+	ScheduledExecutorSubclassTest.suite(),
513	+	SemaphoreTest.suite(),
514	+	SynchronousQueueTest.suite(),
515	+	SystemTest.suite(),
516	+	ThreadLocalTest.suite(),
517	+	ThreadPoolExecutorTest.suite(),
518	+	ThreadPoolExecutorSubclassTest.suite(),
519	+	ThreadTest.suite(),
520	+	TimeUnitTest.suite(),
521	+	TreeMapTest.suite(),
522	+	TreeSetTest.suite(),
523	+	TreeSubMapTest.suite(),
524	+	TreeSubSetTest.suite(),
525	+	VectorTest.suite());
526	+
527	+	// Java8+ test classes
528	+	if (atLeastJava8()) {
529	+	String[] java8TestClassNames = {
530	+	"ArrayDeque8Test",
531	+	"Atomic8Test",
532	+	"CompletableFutureTest",
533	+	"ConcurrentHashMap8Test",
534	+	"CountedCompleter8Test",
535	+	"DoubleAccumulatorTest",
536	+	"DoubleAdderTest",
537	+	"ForkJoinPool8Test",
538	+	"ForkJoinTask8Test",
539	+	"LinkedBlockingDeque8Test",
540	+	"LinkedBlockingQueue8Test",
541	+	"LongAccumulatorTest",
542	+	"LongAdderTest",
543	+	"SplittableRandomTest",
544	+	"StampedLockTest",
545	+	"SubmissionPublisherTest",
546	+	"ThreadLocalRandom8Test",
547	+	"TimeUnit8Test",
548	+	};
549	+	addNamedTestClasses(suite, java8TestClassNames);
550	+	}
551	+
552	+	// Java9+ test classes
553	+	if (atLeastJava9()) {
554	+	String[] java9TestClassNames = {
555	+	"AtomicBoolean9Test",
556	+	"AtomicInteger9Test",
557	+	"AtomicIntegerArray9Test",
558	+	"AtomicLong9Test",
559	+	"AtomicLongArray9Test",
560	+	"AtomicReference9Test",
561	+	"AtomicReferenceArray9Test",
562	+	"ExecutorCompletionService9Test",
563	+	"ForkJoinPool9Test",
564	+	};
565	+	addNamedTestClasses(suite, java9TestClassNames);
566	+	}
567	+
568	+	return suite;
569	+	}
570	+
571	+	/** Returns list of junit-style test method names in given class. */
572	+	public static ArrayList<String> testMethodNames(Class<?> testClass) {
573	+	Method[] methods = testClass.getDeclaredMethods();
574	+	ArrayList<String> names = new ArrayList<>(methods.length);
575	+	for (Method method : methods) {
576	+	if (method.getName().startsWith("test")
577	+	&& Modifier.isPublic(method.getModifiers())
578	+	// method.getParameterCount() requires jdk8+
579	+	&& method.getParameterTypes().length == 0) {
580	+	names.add(method.getName());
581	+	}
582	+	}
583	+	return names;
584	+	}
585	+
586	+	/**
587	+	* Returns junit-style testSuite for the given test class, but
588	+	* parameterized by passing extra data to each test.
589	+	*/
590	+	public static <ExtraData> Test parameterizedTestSuite
591	+	(Class<? extends JSR166TestCase> testClass,
592	+	Class<ExtraData> dataClass,
593	+	ExtraData data) {
594	+	try {
595	+	TestSuite suite = new TestSuite();
596	+	Constructor c =
597	+	testClass.getDeclaredConstructor(dataClass, String.class);
598	+	for (String methodName : testMethodNames(testClass))
599	+	suite.addTest((Test) c.newInstance(data, methodName));
600	+	return suite;
601	+	} catch (Exception e) {
602	+	throw new Error(e);
603	+	}
604	+	}
605	+
606	+	/**
607	+	* Returns junit-style testSuite for the jdk8 extension of the
608	+	* given test class, but parameterized by passing extra data to
609	+	* each test.  Uses reflection to allow compilation in jdk7.
610	+	*/
611	+	public static <ExtraData> Test jdk8ParameterizedTestSuite
612	+	(Class<? extends JSR166TestCase> testClass,
613	+	Class<ExtraData> dataClass,
614	+	ExtraData data) {
615	+	if (atLeastJava8()) {
616	+	String name = testClass.getName();
617	+	String name8 = name.replaceAll("Test$", "8Test");
618	+	if (name.equals(name8)) throw new Error(name);
619	+	try {
620	+	return (Test)
621	+	Class.forName(name8)
622	+	.getMethod("testSuite", new Class[] { dataClass })
623	+	.invoke(null, data);
624	+	} catch (Exception e) {
625	+	throw new Error(e);
626	+	}
627	+	} else {
628	+	return new TestSuite();
629	+	}
630	+	}
631	+
632	+	// Delays for timing-dependent tests, in milliseconds.
633
634		public static long SHORT_DELAY_MS;
635		public static long SMALL_DELAY_MS;
636		public static long MEDIUM_DELAY_MS;
637		public static long LONG_DELAY_MS;
638
185	–
639		/**
640	<	* Returns the shortest timed delay. This could
641	<	* be reimplemented to use for example a Property.
640	>	* Returns the shortest timed delay. This can be scaled up for
641	>	* slow machines using the jsr166.delay.factor system property,
642	>	* or via jtreg's -timeoutFactor: flag.
643	>	* http://openjdk.java.net/jtreg/command-help.html
644		*/
645		protected long getShortDelay() {
646	<	return 50;
646	>	return (long) (50 * delayFactor);
647		}
648
194	–
649		/**
650		* Sets delays as multiples of SHORT_DELAY.
651		*/
652	<	protected  void setDelays() {
652	>	protected void setDelays() {
653		SHORT_DELAY_MS = getShortDelay();
654	<	SMALL_DELAY_MS = SHORT_DELAY_MS * 5;
654	>	SMALL_DELAY_MS  = SHORT_DELAY_MS * 5;
655		MEDIUM_DELAY_MS = SHORT_DELAY_MS * 10;
656	<	LONG_DELAY_MS = SHORT_DELAY_MS * 50;
656	>	LONG_DELAY_MS   = SHORT_DELAY_MS * 200;
657	>	}
658	>
659	>	/**
660	>	* Returns a timeout in milliseconds to be used in tests that
661	>	* verify that operations block or time out.
662	>	*/
663	>	long timeoutMillis() {
664	>	return SHORT_DELAY_MS / 4;
665		}
666
667		/**
668	<	* Flag set true if any threadAssert methods fail
668	>	* Returns a new Date instance representing a time at least
669	>	* delayMillis milliseconds in the future.
670		*/
671	<	volatile boolean threadFailed;
671	>	Date delayedDate(long delayMillis) {
672	>	// Add 1 because currentTimeMillis is known to round into the past.
673	>	return new Date(System.currentTimeMillis() + delayMillis + 1);
674	>	}
675
676		/**
677	<	* Initializes test to indicate that no thread assertions have failed
677	>	* The first exception encountered if any threadAssertXXX method fails.
678		*/
679	+	private final AtomicReference<Throwable> threadFailure
680	+	= new AtomicReference<>(null);
681	+
682	+	/**
683	+	* Records an exception so that it can be rethrown later in the test
684	+	* harness thread, triggering a test case failure.  Only the first
685	+	* failure is recorded; subsequent calls to this method from within
686	+	* the same test have no effect.
687	+	*/
688	+	public void threadRecordFailure(Throwable t) {
689	+	System.err.println(t);
690	+	dumpTestThreads();
691	+	threadFailure.compareAndSet(null, t);
692	+	}
693	+
694		public void setUp() {
695		setDelays();
696	<	threadFailed = false;
696	>	}
697	>
698	>	void tearDownFail(String format, Object... args) {
699	>	String msg = toString() + ": " + String.format(format, args);
700	>	System.err.println(msg);
701	>	dumpTestThreads();
702	>	throw new AssertionFailedError(msg);
703	>	}
704	>
705	>	/**
706	>	* Extra checks that get done for all test cases.
707	>	*
708	>	* Triggers test case failure if any thread assertions have failed,
709	>	* by rethrowing, in the test harness thread, any exception recorded
710	>	* earlier by threadRecordFailure.
711	>	*
712	>	* Triggers test case failure if interrupt status is set in the main thread.
713	>	*/
714	>	public void tearDown() throws Exception {
715	>	Throwable t = threadFailure.getAndSet(null);
716	>	if (t != null) {
717	>	if (t instanceof Error)
718	>	throw (Error) t;
719	>	else if (t instanceof RuntimeException)
720	>	throw (RuntimeException) t;
721	>	else if (t instanceof Exception)
722	>	throw (Exception) t;
723	>	else {
724	>	AssertionFailedError afe =
725	>	new AssertionFailedError(t.toString());
726	>	afe.initCause(t);
727	>	throw afe;
728	>	}
729	>	}
730	>
731	>	if (Thread.interrupted())
732	>	tearDownFail("interrupt status set in main thread");
733	>
734	>	checkForkJoinPoolThreadLeaks();
735		}
736
737		/**
738	<	* Triggers test case failure if any thread assertions have failed
738	>	* Finds missing PoolCleaners
739		*/
740	<	public void tearDown() {
741	<	assertFalse(threadFailed);
740	>	void checkForkJoinPoolThreadLeaks() throws InterruptedException {
741	>	Thread[] survivors = new Thread[7];
742	>	int count = Thread.enumerate(survivors);
743	>	for (int i = 0; i < count; i++) {
744	>	Thread thread = survivors[i];
745	>	String name = thread.getName();
746	>	if (name.startsWith("ForkJoinPool-")) {
747	>	// give thread some time to terminate
748	>	thread.join(LONG_DELAY_MS);
749	>	if (thread.isAlive())
750	>	tearDownFail("Found leaked ForkJoinPool thread thread=%s",
751	>	thread);
752	>	}
753	>	}
754	>
755	>	if (!ForkJoinPool.commonPool()
756	>	.awaitQuiescence(LONG_DELAY_MS, MILLISECONDS))
757	>	tearDownFail("ForkJoin common pool thread stuck");
758		}
759
760		/**
761	<	* Fail, also setting status to indicate current testcase should fail
761	>	* Just like fail(reason), but additionally recording (using
762	>	* threadRecordFailure) any AssertionFailedError thrown, so that
763	>	* the current testcase will fail.
764		*/
765		public void threadFail(String reason) {
766	<	threadFailed = true;
767	<	fail(reason);
766	>	try {
767	>	fail(reason);
768	>	} catch (AssertionFailedError t) {
769	>	threadRecordFailure(t);
770	>	throw t;
771	>	}
772		}
773
774		/**
775	<	* If expression not true, set status to indicate current testcase
776	<	* should fail
775	>	* Just like assertTrue(b), but additionally recording (using
776	>	* threadRecordFailure) any AssertionFailedError thrown, so that
777	>	* the current testcase will fail.
778		*/
779		public void threadAssertTrue(boolean b) {
780	<	if (!b) {
239	<	threadFailed = true;
780	>	try {
781		assertTrue(b);
782	+	} catch (AssertionFailedError t) {
783	+	threadRecordFailure(t);
784	+	throw t;
785		}
786		}
787
788		/**
789	<	* If expression not false, set status to indicate current testcase
790	<	* should fail
789	>	* Just like assertFalse(b), but additionally recording (using
790	>	* threadRecordFailure) any AssertionFailedError thrown, so that
791	>	* the current testcase will fail.
792		*/
793		public void threadAssertFalse(boolean b) {
794	<	if (b) {
250	<	threadFailed = true;
794	>	try {
795		assertFalse(b);
796	+	} catch (AssertionFailedError t) {
797	+	threadRecordFailure(t);
798	+	throw t;
799		}
800		}
801
802		/**
803	<	* If argument not null, set status to indicate current testcase
804	<	* should fail
803	>	* Just like assertNull(x), but additionally recording (using
804	>	* threadRecordFailure) any AssertionFailedError thrown, so that
805	>	* the current testcase will fail.
806		*/
807		public void threadAssertNull(Object x) {
808	<	if (x != null) {
261	<	threadFailed = true;
808	>	try {
809		assertNull(x);
810	+	} catch (AssertionFailedError t) {
811	+	threadRecordFailure(t);
812	+	throw t;
813		}
814		}
815
816		/**
817	<	* If arguments not equal, set status to indicate current testcase
818	<	* should fail
817	>	* Just like assertEquals(x, y), but additionally recording (using
818	>	* threadRecordFailure) any AssertionFailedError thrown, so that
819	>	* the current testcase will fail.
820		*/
821		public void threadAssertEquals(long x, long y) {
822	<	if (x != y) {
272	<	threadFailed = true;
822	>	try {
823		assertEquals(x, y);
824	+	} catch (AssertionFailedError t) {
825	+	threadRecordFailure(t);
826	+	throw t;
827		}
828		}
829
830		/**
831	<	* If arguments not equal, set status to indicate current testcase
832	<	* should fail
831	>	* Just like assertEquals(x, y), but additionally recording (using
832	>	* threadRecordFailure) any AssertionFailedError thrown, so that
833	>	* the current testcase will fail.
834		*/
835		public void threadAssertEquals(Object x, Object y) {
836	<	if (x != y && (x == null || !x.equals(y))) {
283	<	threadFailed = true;
836	>	try {
837		assertEquals(x, y);
838	+	} catch (AssertionFailedError fail) {
839	+	threadRecordFailure(fail);
840	+	throw fail;
841	+	} catch (Throwable fail) {
842	+	threadUnexpectedException(fail);
843		}
844		}
845
846		/**
847	<	* threadFail with message "should throw exception"
847	>	* Just like assertSame(x, y), but additionally recording (using
848	>	* threadRecordFailure) any AssertionFailedError thrown, so that
849	>	* the current testcase will fail.
850		*/
851	<	public void threadShouldThrow() {
851	>	public void threadAssertSame(Object x, Object y) {
852		try {
853	<	threadFailed = true;
854	<	fail("should throw exception");
855	<	} catch (AssertionFailedError e) {
856	<	e.printStackTrace();
297	<	throw e;
853	>	assertSame(x, y);
854	>	} catch (AssertionFailedError fail) {
855	>	threadRecordFailure(fail);
856	>	throw fail;
857		}
858		}
859
860		/**
861	<	* threadFail with message "Unexpected exception"
861	>	* Calls threadFail with message "should throw exception".
862		*/
863	<	public void threadUnexpectedException() {
864	<	threadFailed = true;
306	<	fail("Unexpected exception");
863	>	public void threadShouldThrow() {
864	>	threadFail("should throw exception");
865		}
866
867		/**
868	<	* threadFail with message "Unexpected exception", with argument
868	>	* Calls threadFail with message "should throw" + exceptionName.
869		*/
870	<	public void threadUnexpectedException(Throwable ex) {
871	<	threadFailed = true;
314	<	ex.printStackTrace();
315	<	fail("Unexpected exception: " + ex);
870	>	public void threadShouldThrow(String exceptionName) {
871	>	threadFail("should throw " + exceptionName);
872		}
873
874		/**
875	<	* Wait out termination of a thread pool or fail doing so
875	>	* Records the given exception using {@link #threadRecordFailure},
876	>	* then rethrows the exception, wrapping it in an
877	>	* AssertionFailedError if necessary.
878		*/
879	<	public void joinPool(ExecutorService exec) {
879	>	public void threadUnexpectedException(Throwable t) {
880	>	threadRecordFailure(t);
881	>	t.printStackTrace();
882	>	if (t instanceof RuntimeException)
883	>	throw (RuntimeException) t;
884	>	else if (t instanceof Error)
885	>	throw (Error) t;
886	>	else {
887	>	AssertionFailedError afe =
888	>	new AssertionFailedError("unexpected exception: " + t);
889	>	afe.initCause(t);
890	>	throw afe;
891	>	}
892	>	}
893	>
894	>	/**
895	>	* Delays, via Thread.sleep, for the given millisecond delay, but
896	>	* if the sleep is shorter than specified, may re-sleep or yield
897	>	* until time elapses.  Ensures that the given time, as measured
898	>	* by System.nanoTime(), has elapsed.
899	>	*/
900	>	static void delay(long millis) throws InterruptedException {
901	>	long nanos = millis * (1000 * 1000);
902	>	final long wakeupTime = System.nanoTime() + nanos;
903	>	do {
904	>	if (millis > 0L)
905	>	Thread.sleep(millis);
906	>	else // too short to sleep
907	>	Thread.yield();
908	>	nanos = wakeupTime - System.nanoTime();
909	>	millis = nanos / (1000 * 1000);
910	>	} while (nanos >= 0L);
911	>	}
912	>
913	>	/**
914	>	* Allows use of try-with-resources with per-test thread pools.
915	>	*/
916	>	class PoolCleaner implements AutoCloseable {
917	>	private final ExecutorService pool;
918	>	public PoolCleaner(ExecutorService pool) { this.pool = pool; }
919	>	public void close() { joinPool(pool); }
920	>	}
921	>
922	>	/**
923	>	* An extension of PoolCleaner that has an action to release the pool.
924	>	*/
925	>	class PoolCleanerWithReleaser extends PoolCleaner {
926	>	private final Runnable releaser;
927	>	public PoolCleanerWithReleaser(ExecutorService pool, Runnable releaser) {
928	>	super(pool);
929	>	this.releaser = releaser;
930	>	}
931	>	public void close() {
932	>	try {
933	>	releaser.run();
934	>	} finally {
935	>	super.close();
936	>	}
937	>	}
938	>	}
939	>
940	>	PoolCleaner cleaner(ExecutorService pool) {
941	>	return new PoolCleaner(pool);
942	>	}
943	>
944	>	PoolCleaner cleaner(ExecutorService pool, Runnable releaser) {
945	>	return new PoolCleanerWithReleaser(pool, releaser);
946	>	}
947	>
948	>	PoolCleaner cleaner(ExecutorService pool, CountDownLatch latch) {
949	>	return new PoolCleanerWithReleaser(pool, releaser(latch));
950	>	}
951	>
952	>	Runnable releaser(final CountDownLatch latch) {
953	>	return new Runnable() { public void run() {
954	>	do { latch.countDown(); }
955	>	while (latch.getCount() > 0);
956	>	}};
957	>	}
958	>
959	>	PoolCleaner cleaner(ExecutorService pool, AtomicBoolean flag) {
960	>	return new PoolCleanerWithReleaser(pool, releaser(flag));
961	>	}
962	>
963	>	Runnable releaser(final AtomicBoolean flag) {
964	>	return new Runnable() { public void run() { flag.set(true); }};
965	>	}
966	>
967	>	/**
968	>	* Waits out termination of a thread pool or fails doing so.
969	>	*/
970	>	void joinPool(ExecutorService pool) {
971		try {
972	<	exec.shutdown();
973	<	assertTrue(exec.awaitTermination(LONG_DELAY_MS, MILLISECONDS));
972	>	pool.shutdown();
973	>	if (!pool.awaitTermination(2 * LONG_DELAY_MS, MILLISECONDS)) {
974	>	try {
975	>	threadFail("ExecutorService " + pool +
976	>	" did not terminate in a timely manner");
977	>	} finally {
978	>	// last resort, for the benefit of subsequent tests
979	>	pool.shutdownNow();
980	>	pool.awaitTermination(MEDIUM_DELAY_MS, MILLISECONDS);
981	>	}
982	>	}
983		} catch (SecurityException ok) {
984		// Allowed in case test doesn't have privs
985	<	} catch (InterruptedException ie) {
986	<	fail("Unexpected exception");
985	>	} catch (InterruptedException fail) {
986	>	threadFail("Unexpected InterruptedException");
987		}
988		}
989
990	+	/**
991	+	* Like Runnable, but with the freedom to throw anything.
992	+	* junit folks had the same idea:
993	+	* http://junit.org/junit5/docs/snapshot/api/org/junit/gen5/api/Executable.html
994	+	*/
995	+	interface Action { public void run() throws Throwable; }
996
997		/**
998	<	* fail with message "should throw exception"
998	>	* Runs all the given actions in parallel, failing if any fail.
999	>	* Useful for running multiple variants of tests that are
1000	>	* necessarily individually slow because they must block.
1001		*/
1002	<	public void shouldThrow() {
1003	<	fail("Should throw exception");
1002	>	void testInParallel(Action ... actions) {
1003	>	ExecutorService pool = Executors.newCachedThreadPool();
1004	>	try (PoolCleaner cleaner = cleaner(pool)) {
1005	>	ArrayList<Future<?>> futures = new ArrayList<>(actions.length);
1006	>	for (final Action action : actions)
1007	>	futures.add(pool.submit(new CheckedRunnable() {
1008	>	public void realRun() throws Throwable { action.run();}}));
1009	>	for (Future<?> future : futures)
1010	>	try {
1011	>	assertNull(future.get(LONG_DELAY_MS, MILLISECONDS));
1012	>	} catch (ExecutionException ex) {
1013	>	threadUnexpectedException(ex.getCause());
1014	>	} catch (Exception ex) {
1015	>	threadUnexpectedException(ex);
1016	>	}
1017	>	}
1018	>	}
1019	>
1020	>	/**
1021	>	* A debugging tool to print stack traces of most threads, as jstack does.
1022	>	* Uninteresting threads are filtered out.
1023	>	*/
1024	>	static void dumpTestThreads() {
1025	>	SecurityManager sm = System.getSecurityManager();
1026	>	if (sm != null) {
1027	>	try {
1028	>	System.setSecurityManager(null);
1029	>	} catch (SecurityException giveUp) {
1030	>	return;
1031	>	}
1032	>	}
1033	>
1034	>	ThreadMXBean threadMXBean = ManagementFactory.getThreadMXBean();
1035	>	System.err.println("------ stacktrace dump start ------");
1036	>	for (ThreadInfo info : threadMXBean.dumpAllThreads(true, true)) {
1037	>	final String name = info.getThreadName();
1038	>	String lockName;
1039	>	if ("Signal Dispatcher".equals(name))
1040	>	continue;
1041	>	if ("Reference Handler".equals(name)
1042	>	&& (lockName = info.getLockName()) != null
1043	>	&& lockName.startsWith("java.lang.ref.Reference$Lock"))
1044	>	continue;
1045	>	if ("Finalizer".equals(name)
1046	>	&& (lockName = info.getLockName()) != null
1047	>	&& lockName.startsWith("java.lang.ref.ReferenceQueue$Lock"))
1048	>	continue;
1049	>	if ("checkForWedgedTest".equals(name))
1050	>	continue;
1051	>	System.err.print(info);
1052	>	}
1053	>	System.err.println("------ stacktrace dump end ------");
1054	>
1055	>	if (sm != null) System.setSecurityManager(sm);
1056		}
1057
1058		/**
1059	<	* fail with message "Unexpected exception"
1059	>	* Checks that thread does not terminate within the default
1060	>	* millisecond delay of {@code timeoutMillis()}.
1061		*/
1062	<	public void unexpectedException() {
1063	<	fail("Unexpected exception");
1062	>	void assertThreadStaysAlive(Thread thread) {
1063	>	assertThreadStaysAlive(thread, timeoutMillis());
1064		}
1065
1066		/**
1067	<	* fail with message "Unexpected exception", with argument
1067	>	* Checks that thread does not terminate within the given millisecond delay.
1068		*/
1069	<	public void unexpectedException(Throwable ex) {
1070	<	ex.printStackTrace();
1071	<	fail("Unexpected exception: " + ex);
1069	>	void assertThreadStaysAlive(Thread thread, long millis) {
1070	>	try {
1071	>	// No need to optimize the failing case via Thread.join.
1072	>	delay(millis);
1073	>	assertTrue(thread.isAlive());
1074	>	} catch (InterruptedException fail) {
1075	>	threadFail("Unexpected InterruptedException");
1076	>	}
1077		}
1078
1079	+	/**
1080	+	* Checks that the threads do not terminate within the default
1081	+	* millisecond delay of {@code timeoutMillis()}.
1082	+	*/
1083	+	void assertThreadsStayAlive(Thread... threads) {
1084	+	assertThreadsStayAlive(timeoutMillis(), threads);
1085	+	}
1086	+
1087	+	/**
1088	+	* Checks that the threads do not terminate within the given millisecond delay.
1089	+	*/
1090	+	void assertThreadsStayAlive(long millis, Thread... threads) {
1091	+	try {
1092	+	// No need to optimize the failing case via Thread.join.
1093	+	delay(millis);
1094	+	for (Thread thread : threads)
1095	+	assertTrue(thread.isAlive());
1096	+	} catch (InterruptedException fail) {
1097	+	threadFail("Unexpected InterruptedException");
1098	+	}
1099	+	}
1100	+
1101	+	/**
1102	+	* Checks that future.get times out, with the default timeout of
1103	+	* {@code timeoutMillis()}.
1104	+	*/
1105	+	void assertFutureTimesOut(Future future) {
1106	+	assertFutureTimesOut(future, timeoutMillis());
1107	+	}
1108	+
1109	+	/**
1110	+	* Checks that future.get times out, with the given millisecond timeout.
1111	+	*/
1112	+	void assertFutureTimesOut(Future future, long timeoutMillis) {
1113	+	long startTime = System.nanoTime();
1114	+	try {
1115	+	future.get(timeoutMillis, MILLISECONDS);
1116	+	shouldThrow();
1117	+	} catch (TimeoutException success) {
1118	+	} catch (Exception fail) {
1119	+	threadUnexpectedException(fail);
1120	+	} finally { future.cancel(true); }
1121	+	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
1122	+	}
1123	+
1124	+	/**
1125	+	* Fails with message "should throw exception".
1126	+	*/
1127	+	public void shouldThrow() {
1128	+	fail("Should throw exception");
1129	+	}
1130	+
1131	+	/**
1132	+	* Fails with message "should throw " + exceptionName.
1133	+	*/
1134	+	public void shouldThrow(String exceptionName) {
1135	+	fail("Should throw " + exceptionName);
1136	+	}
1137
1138		/**
1139		* The number of elements to place in collections, arrays, etc.
1140		*/
1141	<	static final int SIZE = 20;
1141	>	public static final int SIZE = 20;
1142
1143		// Some convenient Integer constants
1144
1145	<	static final Integer zero = new Integer(0);
1146	<	static final Integer one = new Integer(1);
1147	<	static final Integer two = new Integer(2);
1148	<	static final Integer three  = new Integer(3);
1149	<	static final Integer four  = new Integer(4);
1150	<	static final Integer five  = new Integer(5);
1151	<	static final Integer six = new Integer(6);
1152	<	static final Integer seven = new Integer(7);
1153	<	static final Integer eight = new Integer(8);
1154	<	static final Integer nine = new Integer(9);
1155	<	static final Integer m1  = new Integer(-1);
1156	<	static final Integer m2  = new Integer(-2);
1157	<	static final Integer m3  = new Integer(-3);
1158	<	static final Integer m4 = new Integer(-4);
1159	<	static final Integer m5 = new Integer(-5);
1160	<	static final Integer m6 = new Integer(-6);
1161	<	static final Integer m10 = new Integer(-10);
1145	>	public static final Integer zero  = new Integer(0);
1146	>	public static final Integer one   = new Integer(1);
1147	>	public static final Integer two   = new Integer(2);
1148	>	public static final Integer three = new Integer(3);
1149	>	public static final Integer four  = new Integer(4);
1150	>	public static final Integer five  = new Integer(5);
1151	>	public static final Integer six   = new Integer(6);
1152	>	public static final Integer seven = new Integer(7);
1153	>	public static final Integer eight = new Integer(8);
1154	>	public static final Integer nine  = new Integer(9);
1155	>	public static final Integer m1  = new Integer(-1);
1156	>	public static final Integer m2  = new Integer(-2);
1157	>	public static final Integer m3  = new Integer(-3);
1158	>	public static final Integer m4  = new Integer(-4);
1159	>	public static final Integer m5  = new Integer(-5);
1160	>	public static final Integer m6  = new Integer(-6);
1161	>	public static final Integer m10 = new Integer(-10);
1162	>
1163	>	/**
1164	>	* Runs Runnable r with a security policy that permits precisely
1165	>	* the specified permissions.  If there is no current security
1166	>	* manager, the runnable is run twice, both with and without a
1167	>	* security manager.  We require that any security manager permit
1168	>	* getPolicy/setPolicy.
1169	>	*/
1170	>	public void runWithPermissions(Runnable r, Permission... permissions) {
1171	>	SecurityManager sm = System.getSecurityManager();
1172	>	if (sm == null) {
1173	>	r.run();
1174	>	}
1175	>	runWithSecurityManagerWithPermissions(r, permissions);
1176	>	}
1177	>
1178	>	/**
1179	>	* Runs Runnable r with a security policy that permits precisely
1180	>	* the specified permissions.  If there is no current security
1181	>	* manager, a temporary one is set for the duration of the
1182	>	* Runnable.  We require that any security manager permit
1183	>	* getPolicy/setPolicy.
1184	>	*/
1185	>	public void runWithSecurityManagerWithPermissions(Runnable r,
1186	>	Permission... permissions) {
1187	>	SecurityManager sm = System.getSecurityManager();
1188	>	if (sm == null) {
1189	>	Policy savedPolicy = Policy.getPolicy();
1190	>	try {
1191	>	Policy.setPolicy(permissivePolicy());
1192	>	System.setSecurityManager(new SecurityManager());
1193	>	runWithSecurityManagerWithPermissions(r, permissions);
1194	>	} finally {
1195	>	System.setSecurityManager(null);
1196	>	Policy.setPolicy(savedPolicy);
1197	>	}
1198	>	} else {
1199	>	Policy savedPolicy = Policy.getPolicy();
1200	>	AdjustablePolicy policy = new AdjustablePolicy(permissions);
1201	>	Policy.setPolicy(policy);
1202	>
1203	>	try {
1204	>	r.run();
1205	>	} finally {
1206	>	policy.addPermission(new SecurityPermission("setPolicy"));
1207	>	Policy.setPolicy(savedPolicy);
1208	>	}
1209	>	}
1210	>	}
1211
1212	+	/**
1213	+	* Runs a runnable without any permissions.
1214	+	*/
1215	+	public void runWithoutPermissions(Runnable r) {
1216	+	runWithPermissions(r);
1217	+	}
1218
1219		/**
1220		* A security policy where new permissions can be dynamically added
1221		* or all cleared.
1222		*/
1223	<	static class AdjustablePolicy extends java.security.Policy {
1223	>	public static class AdjustablePolicy extends java.security.Policy {
1224		Permissions perms = new Permissions();
1225	<	AdjustablePolicy() { }
1225	>	AdjustablePolicy(Permission... permissions) {
1226	>	for (Permission permission : permissions)
1227	>	perms.add(permission);
1228	>	}
1229		void addPermission(Permission perm) { perms.add(perm); }
1230		void clearPermissions() { perms = new Permissions(); }
1231	<	public PermissionCollection getPermissions(CodeSource cs) {
1232	<	return perms;
1233	<	}
1234	<	public PermissionCollection getPermissions(ProtectionDomain pd) {
1235	<	return perms;
1236	<	}
1237	<	public boolean implies(ProtectionDomain pd, Permission p) {
1238	<	return perms.implies(p);
1239	<	}
1240	<	public void refresh() {}
1231	>	public PermissionCollection getPermissions(CodeSource cs) {
1232	>	return perms;
1233	>	}
1234	>	public PermissionCollection getPermissions(ProtectionDomain pd) {
1235	>	return perms;
1236	>	}
1237	>	public boolean implies(ProtectionDomain pd, Permission p) {
1238	>	return perms.implies(p);
1239	>	}
1240	>	public void refresh() {}
1241	>	public String toString() {
1242	>	List<Permission> ps = new ArrayList<>();
1243	>	for (Enumeration<Permission> e = perms.elements(); e.hasMoreElements();)
1244	>	ps.add(e.nextElement());
1245	>	return "AdjustablePolicy with permissions " + ps;
1246	>	}
1247		}
1248
1249	+	/**
1250	+	* Returns a policy containing all the permissions we ever need.
1251	+	*/
1252	+	public static Policy permissivePolicy() {
1253	+	return new AdjustablePolicy
1254	+	// Permissions j.u.c. needs directly
1255	+	(new RuntimePermission("modifyThread"),
1256	+	new RuntimePermission("getClassLoader"),
1257	+	new RuntimePermission("setContextClassLoader"),
1258	+	// Permissions needed to change permissions!
1259	+	new SecurityPermission("getPolicy"),
1260	+	new SecurityPermission("setPolicy"),
1261	+	new RuntimePermission("setSecurityManager"),
1262	+	// Permissions needed by the junit test harness
1263	+	new RuntimePermission("accessDeclaredMembers"),
1264	+	new PropertyPermission("*", "read"),
1265	+	new java.io.FilePermission("<<ALL FILES>>", "read"));
1266	+	}
1267	+
1268	+	/**
1269	+	* Sleeps until the given time has elapsed.
1270	+	* Throws AssertionFailedError if interrupted.
1271	+	*/
1272	+	static void sleep(long millis) {
1273	+	try {
1274	+	delay(millis);
1275	+	} catch (InterruptedException fail) {
1276	+	AssertionFailedError afe =
1277	+	new AssertionFailedError("Unexpected InterruptedException");
1278	+	afe.initCause(fail);
1279	+	throw afe;
1280	+	}
1281	+	}
1282	+
1283	+	/**
1284	+	* Spin-waits up to the specified number of milliseconds for the given
1285	+	* thread to enter a wait state: BLOCKED, WAITING, or TIMED_WAITING.
1286	+	*/
1287	+	void waitForThreadToEnterWaitState(Thread thread, long timeoutMillis) {
1288	+	long startTime = 0L;
1289	+	for (;;) {
1290	+	Thread.State s = thread.getState();
1291	+	if (s == Thread.State.BLOCKED ||
1292	+	s == Thread.State.WAITING ||
1293	+	s == Thread.State.TIMED_WAITING)
1294	+	return;
1295	+	else if (s == Thread.State.TERMINATED)
1296	+	fail("Unexpected thread termination");
1297	+	else if (startTime == 0L)
1298	+	startTime = System.nanoTime();
1299	+	else if (millisElapsedSince(startTime) > timeoutMillis) {
1300	+	threadAssertTrue(thread.isAlive());
1301	+	fail("timed out waiting for thread to enter wait state");
1302	+	}
1303	+	Thread.yield();
1304	+	}
1305	+	}
1306	+
1307	+	/**
1308	+	* Spin-waits up to the specified number of milliseconds for the given
1309	+	* thread to enter a wait state: BLOCKED, WAITING, or TIMED_WAITING,
1310	+	* and additionally satisfy the given condition.
1311	+	*/
1312	+	void waitForThreadToEnterWaitState(
1313	+	Thread thread, long timeoutMillis, Callable<Boolean> waitingForGodot) {
1314	+	long startTime = 0L;
1315	+	for (;;) {
1316	+	Thread.State s = thread.getState();
1317	+	if (s == Thread.State.BLOCKED ||
1318	+	s == Thread.State.WAITING ||
1319	+	s == Thread.State.TIMED_WAITING) {
1320	+	try {
1321	+	if (waitingForGodot.call())
1322	+	return;
1323	+	} catch (Throwable fail) { threadUnexpectedException(fail); }
1324	+	}
1325	+	else if (s == Thread.State.TERMINATED)
1326	+	fail("Unexpected thread termination");
1327	+	else if (startTime == 0L)
1328	+	startTime = System.nanoTime();
1329	+	else if (millisElapsedSince(startTime) > timeoutMillis) {
1330	+	threadAssertTrue(thread.isAlive());
1331	+	fail("timed out waiting for thread to enter wait state");
1332	+	}
1333	+	Thread.yield();
1334	+	}
1335	+	}
1336	+
1337	+	/**
1338	+	* Spin-waits up to LONG_DELAY_MS milliseconds for the given thread to
1339	+	* enter a wait state: BLOCKED, WAITING, or TIMED_WAITING.
1340	+	*/
1341	+	void waitForThreadToEnterWaitState(Thread thread) {
1342	+	waitForThreadToEnterWaitState(thread, LONG_DELAY_MS);
1343	+	}
1344	+
1345	+	/**
1346	+	* Spin-waits up to LONG_DELAY_MS milliseconds for the given thread to
1347	+	* enter a wait state: BLOCKED, WAITING, or TIMED_WAITING,
1348	+	* and additionally satisfy the given condition.
1349	+	*/
1350	+	void waitForThreadToEnterWaitState(
1351	+	Thread thread, Callable<Boolean> waitingForGodot) {
1352	+	waitForThreadToEnterWaitState(thread, LONG_DELAY_MS, waitingForGodot);
1353	+	}
1354	+
1355	+	/**
1356	+	* Returns the number of milliseconds since time given by
1357	+	* startNanoTime, which must have been previously returned from a
1358	+	* call to {@link System#nanoTime()}.
1359	+	*/
1360	+	static long millisElapsedSince(long startNanoTime) {
1361	+	return NANOSECONDS.toMillis(System.nanoTime() - startNanoTime);
1362	+	}
1363	+
1364	+	//     void assertTerminatesPromptly(long timeoutMillis, Runnable r) {
1365	+	//         long startTime = System.nanoTime();
1366	+	//         try {
1367	+	//             r.run();
1368	+	//         } catch (Throwable fail) { threadUnexpectedException(fail); }
1369	+	//         if (millisElapsedSince(startTime) > timeoutMillis/2)
1370	+	//             throw new AssertionFailedError("did not return promptly");
1371	+	//     }
1372	+
1373	+	//     void assertTerminatesPromptly(Runnable r) {
1374	+	//         assertTerminatesPromptly(LONG_DELAY_MS/2, r);
1375	+	//     }
1376	+
1377	+	/**
1378	+	* Checks that timed f.get() returns the expected value, and does not
1379	+	* wait for the timeout to elapse before returning.
1380	+	*/
1381	+	<T> void checkTimedGet(Future<T> f, T expectedValue, long timeoutMillis) {
1382	+	long startTime = System.nanoTime();
1383	+	try {
1384	+	assertEquals(expectedValue, f.get(timeoutMillis, MILLISECONDS));
1385	+	} catch (Throwable fail) { threadUnexpectedException(fail); }
1386	+	if (millisElapsedSince(startTime) > timeoutMillis/2)
1387	+	throw new AssertionFailedError("timed get did not return promptly");
1388	+	}
1389	+
1390	+	<T> void checkTimedGet(Future<T> f, T expectedValue) {
1391	+	checkTimedGet(f, expectedValue, LONG_DELAY_MS);
1392	+	}
1393	+
1394	+	/**
1395	+	* Returns a new started daemon Thread running the given runnable.
1396	+	*/
1397	+	Thread newStartedThread(Runnable runnable) {
1398	+	Thread t = new Thread(runnable);
1399	+	t.setDaemon(true);
1400	+	t.start();
1401	+	return t;
1402	+	}
1403	+
1404	+	/**
1405	+	* Waits for the specified time (in milliseconds) for the thread
1406	+	* to terminate (using {@link Thread#join(long)}), else interrupts
1407	+	* the thread (in the hope that it may terminate later) and fails.
1408	+	*/
1409	+	void awaitTermination(Thread t, long timeoutMillis) {
1410	+	try {
1411	+	t.join(timeoutMillis);
1412	+	} catch (InterruptedException fail) {
1413	+	threadUnexpectedException(fail);
1414	+	} finally {
1415	+	if (t.getState() != Thread.State.TERMINATED) {
1416	+	t.interrupt();
1417	+	threadFail("timed out waiting for thread to terminate");
1418	+	}
1419	+	}
1420	+	}
1421	+
1422	+	/**
1423	+	* Waits for LONG_DELAY_MS milliseconds for the thread to
1424	+	* terminate (using {@link Thread#join(long)}), else interrupts
1425	+	* the thread (in the hope that it may terminate later) and fails.
1426	+	*/
1427	+	void awaitTermination(Thread t) {
1428	+	awaitTermination(t, LONG_DELAY_MS);
1429	+	}
1430
1431		// Some convenient Runnable classes
1432
1433	<	abstract class CheckedRunnable implements Runnable {
1434	<	abstract void realRun() throws Throwable;
1433	>	public abstract class CheckedRunnable implements Runnable {
1434	>	protected abstract void realRun() throws Throwable;
1435
1436		public final void run() {
1437		try {
1438		realRun();
1439	+	} catch (Throwable fail) {
1440	+	threadUnexpectedException(fail);
1441	+	}
1442	+	}
1443	+	}
1444	+
1445	+	public abstract class RunnableShouldThrow implements Runnable {
1446	+	protected abstract void realRun() throws Throwable;
1447	+
1448	+	final Class<?> exceptionClass;
1449	+
1450	+	<T extends Throwable> RunnableShouldThrow(Class<T> exceptionClass) {
1451	+	this.exceptionClass = exceptionClass;
1452	+	}
1453	+
1454	+	public final void run() {
1455	+	try {
1456	+	realRun();
1457	+	threadShouldThrow(exceptionClass.getSimpleName());
1458		} catch (Throwable t) {
1459	<	threadUnexpectedException(t);
1459	>	if (! exceptionClass.isInstance(t))
1460	>	threadUnexpectedException(t);
1461		}
1462		}
1463		}
1464
1465	<	abstract class CheckedInterruptedRunnable implements Runnable {
1466	<	abstract void realRun() throws Throwable;
1465	>	public abstract class ThreadShouldThrow extends Thread {
1466	>	protected abstract void realRun() throws Throwable;
1467	>
1468	>	final Class<?> exceptionClass;
1469	>
1470	>	<T extends Throwable> ThreadShouldThrow(Class<T> exceptionClass) {
1471	>	this.exceptionClass = exceptionClass;
1472	>	}
1473
1474		public final void run() {
1475		try {
1476		realRun();
1477	<	threadShouldThrow();
425	<	} catch (InterruptedException success) {
1477	>	threadShouldThrow(exceptionClass.getSimpleName());
1478		} catch (Throwable t) {
1479	<	threadUnexpectedException(t);
1479	>	if (! exceptionClass.isInstance(t))
1480	>	threadUnexpectedException(t);
1481		}
1482		}
1483		}
1484
1485	<	abstract class CheckedCallable<T> implements Callable<T> {
1486	<	abstract T realCall() throws Throwable;
1485	>	public abstract class CheckedInterruptedRunnable implements Runnable {
1486	>	protected abstract void realRun() throws Throwable;
1487	>
1488	>	public final void run() {
1489	>	try {
1490	>	realRun();
1491	>	threadShouldThrow("InterruptedException");
1492	>	} catch (InterruptedException success) {
1493	>	threadAssertFalse(Thread.interrupted());
1494	>	} catch (Throwable fail) {
1495	>	threadUnexpectedException(fail);
1496	>	}
1497	>	}
1498	>	}
1499	>
1500	>	public abstract class CheckedCallable<T> implements Callable<T> {
1501	>	protected abstract T realCall() throws Throwable;
1502
1503		public final T call() {
1504		try {
1505		return realCall();
1506	<	} catch (Throwable t) {
1507	<	threadUnexpectedException(t);
1506	>	} catch (Throwable fail) {
1507	>	threadUnexpectedException(fail);
1508		return null;
1509		}
1510		}
1511		}
1512
1513	<	static class NoOpRunnable implements Runnable {
1513	>	public abstract class CheckedInterruptedCallable<T>
1514	>	implements Callable<T> {
1515	>	protected abstract T realCall() throws Throwable;
1516	>
1517	>	public final T call() {
1518	>	try {
1519	>	T result = realCall();
1520	>	threadShouldThrow("InterruptedException");
1521	>	return result;
1522	>	} catch (InterruptedException success) {
1523	>	threadAssertFalse(Thread.interrupted());
1524	>	} catch (Throwable fail) {
1525	>	threadUnexpectedException(fail);
1526	>	}
1527	>	return null;
1528	>	}
1529	>	}
1530	>
1531	>	public static class NoOpRunnable implements Runnable {
1532		public void run() {}
1533		}
1534
1535	<	static class NoOpCallable implements Callable {
1535	>	public static class NoOpCallable implements Callable {
1536		public Object call() { return Boolean.TRUE; }
1537		}
1538
1539	<	static final String TEST_STRING = "a test string";
1539	>	public static final String TEST_STRING = "a test string";
1540	>
1541	>	public static class StringTask implements Callable<String> {
1542	>	final String value;
1543	>	public StringTask() { this(TEST_STRING); }
1544	>	public StringTask(String value) { this.value = value; }
1545	>	public String call() { return value; }
1546	>	}
1547	>
1548	>	public Callable<String> latchAwaitingStringTask(final CountDownLatch latch) {
1549	>	return new CheckedCallable<String>() {
1550	>	protected String realCall() {
1551	>	try {
1552	>	latch.await();
1553	>	} catch (InterruptedException quittingTime) {}
1554	>	return TEST_STRING;
1555	>	}};
1556	>	}
1557	>
1558	>	public Runnable countDowner(final CountDownLatch latch) {
1559	>	return new CheckedRunnable() {
1560	>	public void realRun() throws InterruptedException {
1561	>	latch.countDown();
1562	>	}};
1563	>	}
1564	>
1565	>	class LatchAwaiter extends CheckedRunnable {
1566	>	static final int NEW = 0;
1567	>	static final int RUNNING = 1;
1568	>	static final int DONE = 2;
1569	>	final CountDownLatch latch;
1570	>	int state = NEW;
1571	>	LatchAwaiter(CountDownLatch latch) { this.latch = latch; }
1572	>	public void realRun() throws InterruptedException {
1573	>	state = 1;
1574	>	await(latch);
1575	>	state = 2;
1576	>	}
1577	>	}
1578	>
1579	>	public LatchAwaiter awaiter(CountDownLatch latch) {
1580	>	return new LatchAwaiter(latch);
1581	>	}
1582
1583	<	static class StringTask implements Callable<String> {
1584	<	public String call() { return TEST_STRING; }
1583	>	public void await(CountDownLatch latch, long timeoutMillis) {
1584	>	try {
1585	>	if (!latch.await(timeoutMillis, MILLISECONDS))
1586	>	fail("timed out waiting for CountDownLatch for "
1587	>	+ (timeoutMillis/1000) + " sec");
1588	>	} catch (Throwable fail) {
1589	>	threadUnexpectedException(fail);
1590	>	}
1591		}
1592
1593	<	static class NPETask implements Callable<String> {
1593	>	public void await(CountDownLatch latch) {
1594	>	await(latch, LONG_DELAY_MS);
1595	>	}
1596	>
1597	>	public void await(Semaphore semaphore) {
1598	>	try {
1599	>	if (!semaphore.tryAcquire(LONG_DELAY_MS, MILLISECONDS))
1600	>	fail("timed out waiting for Semaphore for "
1601	>	+ (LONG_DELAY_MS/1000) + " sec");
1602	>	} catch (Throwable fail) {
1603	>	threadUnexpectedException(fail);
1604	>	}
1605	>	}
1606	>
1607	>	//     /**
1608	>	//      * Spin-waits up to LONG_DELAY_MS until flag becomes true.
1609	>	//      */
1610	>	//     public void await(AtomicBoolean flag) {
1611	>	//         await(flag, LONG_DELAY_MS);
1612	>	//     }
1613	>
1614	>	//     /**
1615	>	//      * Spin-waits up to the specified timeout until flag becomes true.
1616	>	//      */
1617	>	//     public void await(AtomicBoolean flag, long timeoutMillis) {
1618	>	//         long startTime = System.nanoTime();
1619	>	//         while (!flag.get()) {
1620	>	//             if (millisElapsedSince(startTime) > timeoutMillis)
1621	>	//                 throw new AssertionFailedError("timed out");
1622	>	//             Thread.yield();
1623	>	//         }
1624	>	//     }
1625	>
1626	>	public static class NPETask implements Callable<String> {
1627		public String call() { throw new NullPointerException(); }
1628		}
1629
1630	<	static class CallableOne implements Callable<Integer> {
1630	>	public static class CallableOne implements Callable<Integer> {
1631		public Integer call() { return one; }
1632		}
1633
1634	<	class ShortRunnable extends CheckedRunnable {
1635	<	void realRun() throws Throwable {
1636	<	Thread.sleep(SHORT_DELAY_MS);
1634	>	public class ShortRunnable extends CheckedRunnable {
1635	>	protected void realRun() throws Throwable {
1636	>	delay(SHORT_DELAY_MS);
1637		}
1638		}
1639
1640	<	class ShortInterruptedRunnable extends CheckedInterruptedRunnable {
1641	<	void realRun() throws InterruptedException {
1642	<	Thread.sleep(SHORT_DELAY_MS);
1640	>	public class ShortInterruptedRunnable extends CheckedInterruptedRunnable {
1641	>	protected void realRun() throws InterruptedException {
1642	>	delay(SHORT_DELAY_MS);
1643		}
1644		}
1645
1646	<	class SmallRunnable extends CheckedRunnable {
1647	<	void realRun() throws Throwable {
1648	<	Thread.sleep(SMALL_DELAY_MS);
1646	>	public class SmallRunnable extends CheckedRunnable {
1647	>	protected void realRun() throws Throwable {
1648	>	delay(SMALL_DELAY_MS);
1649		}
1650		}
1651
1652	<	class SmallPossiblyInterruptedRunnable extends CheckedRunnable {
1653	<	void realRun() {
1652	>	public class SmallPossiblyInterruptedRunnable extends CheckedRunnable {
1653	>	protected void realRun() {
1654		try {
1655	<	Thread.sleep(SMALL_DELAY_MS);
1656	<	}
490	<	catch (InterruptedException ok) {
491	<	}
1655	>	delay(SMALL_DELAY_MS);
1656	>	} catch (InterruptedException ok) {}
1657		}
1658		}
1659
1660	<	class SmallCallable extends CheckedCallable {
1661	<	Object realCall() throws Throwable {
1662	<	Thread.sleep(SMALL_DELAY_MS);
1660	>	public class SmallCallable extends CheckedCallable {
1661	>	protected Object realCall() throws InterruptedException {
1662	>	delay(SMALL_DELAY_MS);
1663		return Boolean.TRUE;
1664		}
1665		}
1666
1667	<	class SmallInterruptedRunnable extends CheckedInterruptedRunnable {
1668	<	void realRun() throws InterruptedException {
1669	<	Thread.sleep(SMALL_DELAY_MS);
1667	>	public class MediumRunnable extends CheckedRunnable {
1668	>	protected void realRun() throws Throwable {
1669	>	delay(MEDIUM_DELAY_MS);
1670		}
1671		}
1672
1673	<	class MediumRunnable extends CheckedRunnable {
1674	<	void realRun() throws Throwable {
1675	<	Thread.sleep(MEDIUM_DELAY_MS);
1673	>	public class MediumInterruptedRunnable extends CheckedInterruptedRunnable {
1674	>	protected void realRun() throws InterruptedException {
1675	>	delay(MEDIUM_DELAY_MS);
1676		}
1677		}
1678
1679	<	class MediumInterruptedRunnable extends CheckedInterruptedRunnable {
1680	<	void realRun() throws InterruptedException {
1681	<	Thread.sleep(MEDIUM_DELAY_MS);
1682	<	}
1679	>	public Runnable possiblyInterruptedRunnable(final long timeoutMillis) {
1680	>	return new CheckedRunnable() {
1681	>	protected void realRun() {
1682	>	try {
1683	>	delay(timeoutMillis);
1684	>	} catch (InterruptedException ok) {}
1685	>	}};
1686		}
1687
1688	<	class MediumPossiblyInterruptedRunnable extends CheckedRunnable {
1689	<	void realRun() {
1688	>	public class MediumPossiblyInterruptedRunnable extends CheckedRunnable {
1689	>	protected void realRun() {
1690		try {
1691	<	Thread.sleep(MEDIUM_DELAY_MS);
1692	<	}
525	<	catch (InterruptedException ok) {
526	<	}
1691	>	delay(MEDIUM_DELAY_MS);
1692	>	} catch (InterruptedException ok) {}
1693		}
1694		}
1695
1696	<	class LongPossiblyInterruptedRunnable extends CheckedRunnable {
1697	<	void realRun() {
1696	>	public class LongPossiblyInterruptedRunnable extends CheckedRunnable {
1697	>	protected void realRun() {
1698		try {
1699	<	Thread.sleep(LONG_DELAY_MS);
1700	<	}
535	<	catch (InterruptedException ok) {
536	<	}
1699	>	delay(LONG_DELAY_MS);
1700	>	} catch (InterruptedException ok) {}
1701		}
1702		}
1703
1704		/**
1705		* For use as ThreadFactory in constructors
1706		*/
1707	<	static class SimpleThreadFactory implements ThreadFactory {
1707	>	public static class SimpleThreadFactory implements ThreadFactory {
1708		public Thread newThread(Runnable r) {
1709		return new Thread(r);
1710		}
1711		}
1712
1713	<	static class TrackedShortRunnable implements Runnable {
1714	<	volatile boolean done = false;
1713	>	public interface TrackedRunnable extends Runnable {
1714	>	boolean isDone();
1715	>	}
1716	>
1717	>	public static TrackedRunnable trackedRunnable(final long timeoutMillis) {
1718	>	return new TrackedRunnable() {
1719	>	private volatile boolean done = false;
1720	>	public boolean isDone() { return done; }
1721	>	public void run() {
1722	>	try {
1723	>	delay(timeoutMillis);
1724	>	done = true;
1725	>	} catch (InterruptedException ok) {}
1726	>	}
1727	>	};
1728	>	}
1729	>
1730	>	public static class TrackedShortRunnable implements Runnable {
1731	>	public volatile boolean done = false;
1732		public void run() {
1733		try {
1734	<	Thread.sleep(SMALL_DELAY_MS);
1734	>	delay(SHORT_DELAY_MS);
1735		done = true;
1736	<	} catch (Exception e) {
556	<	}
1736	>	} catch (InterruptedException ok) {}
1737		}
1738		}
1739
1740	<	static class TrackedMediumRunnable implements Runnable {
1741	<	volatile boolean done = false;
1740	>	public static class TrackedSmallRunnable implements Runnable {
1741	>	public volatile boolean done = false;
1742		public void run() {
1743		try {
1744	<	Thread.sleep(MEDIUM_DELAY_MS);
1744	>	delay(SMALL_DELAY_MS);
1745		done = true;
1746	<	} catch (Exception e) {
567	<	}
1746	>	} catch (InterruptedException ok) {}
1747		}
1748		}
1749
1750	<	static class TrackedLongRunnable implements Runnable {
1751	<	volatile boolean done = false;
1750	>	public static class TrackedMediumRunnable implements Runnable {
1751	>	public volatile boolean done = false;
1752		public void run() {
1753		try {
1754	<	Thread.sleep(LONG_DELAY_MS);
1754	>	delay(MEDIUM_DELAY_MS);
1755		done = true;
1756	<	} catch (Exception e) {
1757	<	}
1756	>	} catch (InterruptedException ok) {}
1757	>	}
1758	>	}
1759	>
1760	>	public static class TrackedLongRunnable implements Runnable {
1761	>	public volatile boolean done = false;
1762	>	public void run() {
1763	>	try {
1764	>	delay(LONG_DELAY_MS);
1765	>	done = true;
1766	>	} catch (InterruptedException ok) {}
1767		}
1768		}
1769
1770	<	static class TrackedNoOpRunnable implements Runnable {
1771	<	volatile boolean done = false;
1770	>	public static class TrackedNoOpRunnable implements Runnable {
1771	>	public volatile boolean done = false;
1772		public void run() {
1773		done = true;
1774		}
1775		}
1776
1777	<	static class TrackedCallable implements Callable {
1778	<	volatile boolean done = false;
1777	>	public static class TrackedCallable implements Callable {
1778	>	public volatile boolean done = false;
1779		public Object call() {
1780		try {
1781	<	Thread.sleep(SMALL_DELAY_MS);
1781	>	delay(SMALL_DELAY_MS);
1782		done = true;
1783	<	} catch (Exception e) {
596	<	}
1783	>	} catch (InterruptedException ok) {}
1784		return Boolean.TRUE;
1785		}
1786		}
1787
1788	+	/**
1789	+	* Analog of CheckedRunnable for RecursiveAction
1790	+	*/
1791	+	public abstract class CheckedRecursiveAction extends RecursiveAction {
1792	+	protected abstract void realCompute() throws Throwable;
1793	+
1794	+	@Override protected final void compute() {
1795	+	try {
1796	+	realCompute();
1797	+	} catch (Throwable fail) {
1798	+	threadUnexpectedException(fail);
1799	+	}
1800	+	}
1801	+	}
1802	+
1803	+	/**
1804	+	* Analog of CheckedCallable for RecursiveTask
1805	+	*/
1806	+	public abstract class CheckedRecursiveTask<T> extends RecursiveTask<T> {
1807	+	protected abstract T realCompute() throws Throwable;
1808	+
1809	+	@Override protected final T compute() {
1810	+	try {
1811	+	return realCompute();
1812	+	} catch (Throwable fail) {
1813	+	threadUnexpectedException(fail);
1814	+	return null;
1815	+	}
1816	+	}
1817	+	}
1818
1819		/**
1820		* For use as RejectedExecutionHandler in constructors
1821		*/
1822	<	static class NoOpREHandler implements RejectedExecutionHandler {
1822	>	public static class NoOpREHandler implements RejectedExecutionHandler {
1823		public void rejectedExecution(Runnable r,
1824		ThreadPoolExecutor executor) {}
1825		}
1826
1827	+	/**
1828	+	* A CyclicBarrier that uses timed await and fails with
1829	+	* AssertionFailedErrors instead of throwing checked exceptions.
1830	+	*/
1831	+	public static class CheckedBarrier extends CyclicBarrier {
1832	+	public CheckedBarrier(int parties) { super(parties); }
1833	+
1834	+	public int await() {
1835	+	try {
1836	+	return super.await(2 * LONG_DELAY_MS, MILLISECONDS);
1837	+	} catch (TimeoutException timedOut) {
1838	+	throw new AssertionFailedError("timed out");
1839	+	} catch (Exception fail) {
1840	+	AssertionFailedError afe =
1841	+	new AssertionFailedError("Unexpected exception: " + fail);
1842	+	afe.initCause(fail);
1843	+	throw afe;
1844	+	}
1845	+	}
1846	+	}
1847	+
1848	+	void checkEmpty(BlockingQueue q) {
1849	+	try {
1850	+	assertTrue(q.isEmpty());
1851	+	assertEquals(0, q.size());
1852	+	assertNull(q.peek());
1853	+	assertNull(q.poll());
1854	+	assertNull(q.poll(0, MILLISECONDS));
1855	+	assertEquals(q.toString(), "[]");
1856	+	assertTrue(Arrays.equals(q.toArray(), new Object[0]));
1857	+	assertFalse(q.iterator().hasNext());
1858	+	try {
1859	+	q.element();
1860	+	shouldThrow();
1861	+	} catch (NoSuchElementException success) {}
1862	+	try {
1863	+	q.iterator().next();
1864	+	shouldThrow();
1865	+	} catch (NoSuchElementException success) {}
1866	+	try {
1867	+	q.remove();
1868	+	shouldThrow();
1869	+	} catch (NoSuchElementException success) {}
1870	+	} catch (InterruptedException fail) { threadUnexpectedException(fail); }
1871	+	}
1872	+
1873	+	void assertSerialEquals(Object x, Object y) {
1874	+	assertTrue(Arrays.equals(serialBytes(x), serialBytes(y)));
1875	+	}
1876	+
1877	+	void assertNotSerialEquals(Object x, Object y) {
1878	+	assertFalse(Arrays.equals(serialBytes(x), serialBytes(y)));
1879	+	}
1880	+
1881	+	byte[] serialBytes(Object o) {
1882	+	try {
1883	+	ByteArrayOutputStream bos = new ByteArrayOutputStream();
1884	+	ObjectOutputStream oos = new ObjectOutputStream(bos);
1885	+	oos.writeObject(o);
1886	+	oos.flush();
1887	+	oos.close();
1888	+	return bos.toByteArray();
1889	+	} catch (Throwable fail) {
1890	+	threadUnexpectedException(fail);
1891	+	return new byte[0];
1892	+	}
1893	+	}
1894	+
1895	+	void assertImmutable(final Object o) {
1896	+	if (o instanceof Collection) {
1897	+	assertThrows(
1898	+	UnsupportedOperationException.class,
1899	+	new Runnable() { public void run() {
1900	+	((Collection) o).add(null);}});
1901	+	}
1902	+	}
1903	+
1904	+	@SuppressWarnings("unchecked")
1905	+	<T> T serialClone(T o) {
1906	+	try {
1907	+	ObjectInputStream ois = new ObjectInputStream
1908	+	(new ByteArrayInputStream(serialBytes(o)));
1909	+	T clone = (T) ois.readObject();
1910	+	if (o == clone) assertImmutable(o);
1911	+	assertSame(o.getClass(), clone.getClass());
1912	+	return clone;
1913	+	} catch (Throwable fail) {
1914	+	threadUnexpectedException(fail);
1915	+	return null;
1916	+	}
1917	+	}
1918	+
1919	+	/**
1920	+	* A version of serialClone that leaves error handling (for
1921	+	* e.g. NotSerializableException) up to the caller.
1922	+	*/
1923	+	@SuppressWarnings("unchecked")
1924	+	<T> T serialClonePossiblyFailing(T o)
1925	+	throws ReflectiveOperationException, java.io.IOException {
1926	+	ByteArrayOutputStream bos = new ByteArrayOutputStream();
1927	+	ObjectOutputStream oos = new ObjectOutputStream(bos);
1928	+	oos.writeObject(o);
1929	+	oos.flush();
1930	+	oos.close();
1931	+	ObjectInputStream ois = new ObjectInputStream
1932	+	(new ByteArrayInputStream(bos.toByteArray()));
1933	+	T clone = (T) ois.readObject();
1934	+	if (o == clone) assertImmutable(o);
1935	+	assertSame(o.getClass(), clone.getClass());
1936	+	return clone;
1937	+	}
1938	+
1939	+	/**
1940	+	* If o implements Cloneable and has a public clone method,
1941	+	* returns a clone of o, else null.
1942	+	*/
1943	+	@SuppressWarnings("unchecked")
1944	+	<T> T cloneableClone(T o) {
1945	+	if (!(o instanceof Cloneable)) return null;
1946	+	final T clone;
1947	+	try {
1948	+	clone = (T) o.getClass().getMethod("clone").invoke(o);
1949	+	} catch (NoSuchMethodException ok) {
1950	+	return null;
1951	+	} catch (ReflectiveOperationException unexpected) {
1952	+	throw new Error(unexpected);
1953	+	}
1954	+	assertNotSame(o, clone); // not 100% guaranteed by spec
1955	+	assertSame(o.getClass(), clone.getClass());
1956	+	return clone;
1957	+	}
1958	+
1959	+	public void assertThrows(Class<? extends Throwable> expectedExceptionClass,
1960	+	Runnable... throwingActions) {
1961	+	for (Runnable throwingAction : throwingActions) {
1962	+	boolean threw = false;
1963	+	try { throwingAction.run(); }
1964	+	catch (Throwable t) {
1965	+	threw = true;
1966	+	if (!expectedExceptionClass.isInstance(t)) {
1967	+	AssertionFailedError afe =
1968	+	new AssertionFailedError
1969	+	("Expected " + expectedExceptionClass.getName() +
1970	+	", got " + t.getClass().getName());
1971	+	afe.initCause(t);
1972	+	threadUnexpectedException(afe);
1973	+	}
1974	+	}
1975	+	if (!threw)
1976	+	shouldThrow(expectedExceptionClass.getName());
1977	+	}
1978	+	}
1979	+
1980	+	public void assertIteratorExhausted(Iterator<?> it) {
1981	+	try {
1982	+	it.next();
1983	+	shouldThrow();
1984	+	} catch (NoSuchElementException success) {}
1985	+	assertFalse(it.hasNext());
1986	+	}
1987	+
1988	+	public <T> Callable<T> callableThrowing(final Exception ex) {
1989	+	return new Callable<T>() { public T call() throws Exception { throw ex; }};
1990	+	}
1991	+
1992	+	public Runnable runnableThrowing(final RuntimeException ex) {
1993	+	return new Runnable() { public void run() { throw ex; }};
1994	+	}
1995	+
1996	+	/** A reusable thread pool to be shared by tests. */
1997	+	static final ExecutorService cachedThreadPool =
1998	+	new ThreadPoolExecutor(0, Integer.MAX_VALUE,
1999	+	1000L, MILLISECONDS,
2000	+	new SynchronousQueue<Runnable>());
2001	+
2002	+	static <T> void shuffle(T[] array) {
2003	+	Collections.shuffle(Arrays.asList(array), ThreadLocalRandom.current());
2004	+	}
2005		}

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