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

Comparing jsr166/src/test/tck/JSR166TestCase.java (file contents):
Revision 1.6 by dl, Sun Oct 5 23:00:40 2003 UTC vs.
Revision 1.221 by jsr166, Tue Mar 14 00:54:27 2017 UTC

#	Line 1 | Line 1
1		/*
2	<	* Written by members of JCP JSR-166 Expert Group and released to the
3	<	* public domain. Use, modify, and redistribute this code in any way
4	<	* without acknowledgement. Other contributors include Andrew Wright,
5	<	* Jeffrey Hayes, Pat Fischer, Mike Judd.
2	>	* Written by Doug Lea and Martin Buchholz with assistance from
3	>	* members of JCP JSR-166 Expert Group and released to the public
4	>	* domain, as explained at
5	>	* http://creativecommons.org/publicdomain/zero/1.0/
6	>	* Other contributors include Andrew Wright, Jeffrey Hayes,
7	>	* Pat Fisher, Mike Judd.
8		*/
9
10	<	import junit.framework.*;
11	<	import java.util.*;
12	<	import java.util.concurrent.*;
13	<	import java.io.*;
10	>	/*
11	>	* @test
12	>	* @summary JSR-166 tck tests, in a number of variations.
13	>	*          The first is the conformance testing variant,
14	>	*          while others also test implementation details.
15	>	* @build *
16	>	* @modules java.management
17	>	* @run junit/othervm/timeout=1000 JSR166TestCase
18	>	* @run junit/othervm/timeout=1000
19	>	*      --add-opens java.base/java.util.concurrent=ALL-UNNAMED
20	>	*      --add-opens java.base/java.lang=ALL-UNNAMED
21	>	*      -Djsr166.testImplementationDetails=true
22	>	*      JSR166TestCase
23	>	* @run junit/othervm/timeout=1000
24	>	*      --add-opens java.base/java.util.concurrent=ALL-UNNAMED
25	>	*      --add-opens java.base/java.lang=ALL-UNNAMED
26	>	*      -Djsr166.testImplementationDetails=true
27	>	*      -Djava.util.concurrent.ForkJoinPool.common.parallelism=0
28	>	*      JSR166TestCase
29	>	* @run junit/othervm/timeout=1000
30	>	*      --add-opens java.base/java.util.concurrent=ALL-UNNAMED
31	>	*      --add-opens java.base/java.lang=ALL-UNNAMED
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	>	*      --add-opens java.base/java.util.concurrent=ALL-UNNAMED
38	>	*      --add-opens java.base/java.lang=ALL-UNNAMED
39	>	*      -Djsr166.testImplementationDetails=true
40	>	*      JSR166TestCase
41	>	*/
42
43	+	import static java.util.concurrent.TimeUnit.MILLISECONDS;
44	+	import static java.util.concurrent.TimeUnit.MINUTES;
45	+	import static java.util.concurrent.TimeUnit.NANOSECONDS;
46	+
47	+	import java.io.ByteArrayInputStream;
48	+	import java.io.ByteArrayOutputStream;
49	+	import java.io.ObjectInputStream;
50	+	import java.io.ObjectOutputStream;
51	+	import java.lang.management.ManagementFactory;
52	+	import java.lang.management.ThreadInfo;
53	+	import java.lang.management.ThreadMXBean;
54	+	import java.lang.reflect.Constructor;
55	+	import java.lang.reflect.Method;
56	+	import java.lang.reflect.Modifier;
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.Pattern;
95	+
96	+	import junit.framework.AssertionFailedError;
97	+	import junit.framework.Test;
98	+	import junit.framework.TestCase;
99	+	import junit.framework.TestResult;
100	+	import junit.framework.TestSuite;
101
102		/**
103		* Base class for JSR166 Junit TCK tests.  Defines some constants,
104		* utility methods and classes, as well as a simple framework for
105		* helping to make sure that assertions failing in generated threads
106		* cause the associated test that generated them to itself fail (which
107	<	* JUnit doe not otherwise arrange).  The rules for creating such
107	>	* JUnit does not otherwise arrange).  The rules for creating such
108		* tests are:
109		*
110		* <ol>
111		*
112	<	* <li> All assertions in code running in generated threads must use
113	<	* the forms {@link threadFail} , {@link threadAssertTrue} {@link
114	<	* threadAssertEquals}, or {@link threadAssertNull}, (not
115	<	* <tt>fail</tt>, <tt>assertTrue</tt>, etc.) It is OK (but not
112	>	* <li>All assertions in code running in generated threads must use
113	>	* the forms {@link #threadFail}, {@link #threadAssertTrue}, {@link
114	>	* #threadAssertEquals}, or {@link #threadAssertNull}, (not
115	>	* {@code fail}, {@code assertTrue}, etc.) It is OK (but not
116		* particularly recommended) for other code to use these forms too.
117		* Only the most typically used JUnit assertion methods are defined
118	<	* this way, but enough to live with.</li>
118	>	* this way, but enough to live with.
119		*
120	<	* <li> If you override {@link setUp} or {@link tearDown}, make sure
121	<	* to invoke <tt>super.setUp</tt> and <tt>super.tearDown</tt> within
120	>	* <li>If you override {@link #setUp} or {@link #tearDown}, make sure
121	>	* to invoke {@code super.setUp} and {@code super.tearDown} within
122		* them. These methods are used to clear and check for thread
123	<	* assertion failures.</li>
123	>	* assertion failures.
124		*
125	<	* <li>All delays and timeouts must use one of the constants <tt>
126	<	* SHORT_DELAY_MS</tt>, <tt> SMALL_DELAY_MS</tt>, <tt> MEDIUM_DELAY_MS</tt>,
127	<	* <tt> LONG_DELAY_MS</tt>. The idea here is that a SHORT is always
125	>	* <li>All delays and timeouts must use one of the constants {@code
126	>	* SHORT_DELAY_MS}, {@code SMALL_DELAY_MS}, {@code MEDIUM_DELAY_MS},
127	>	* {@code LONG_DELAY_MS}. The idea here is that a SHORT is always
128		* discriminable from zero time, and always allows enough time for the
129		* small amounts of computation (creating a thread, calling a few
130		* methods, etc) needed to reach a timeout point. Similarly, a SMALL
131		* is always discriminable as larger than SHORT and smaller than
132		* MEDIUM.  And so on. These constants are set to conservative values,
133		* but even so, if there is ever any doubt, they can all be increased
134	<	* in one spot to rerun tests on slower platforms</li>
134	>	* in one spot to rerun tests on slower platforms.
135		*
136	<	* <li> All threads generated must be joined inside each test case
137	<	* method (or <tt>fail</tt> to do so) before returning from the
138	<	* method. The <tt> joinPool</tt> method can be used to do this when
139	<	* using Executors.</li>
136	>	* <li>All threads generated must be joined inside each test case
137	>	* method (or {@code fail} to do so) before returning from the
138	>	* method. The {@code joinPool} method can be used to do this when
139	>	* using Executors.
140		*
141		* </ol>
142		*
143	<	* <p> <b>Other notes</b>
143	>	* <p><b>Other notes</b>
144		* <ul>
145		*
146	<	* <li> Usually, there is one testcase method per JSR166 method
146	>	* <li>Usually, there is one testcase method per JSR166 method
147		* covering "normal" operation, and then as many exception-testing
148		* methods as there are exceptions the method can throw. Sometimes
149		* there are multiple tests per JSR166 method when the different
150		* "normal" behaviors differ significantly. And sometimes testcases
151	<	* cover multiple methods when they cannot be tested in
152	<	* isolation.</li>
153	<	*
66	<	* <li> The documentation style for testcases is to provide as javadoc
151	>	* cover multiple methods when they cannot be tested in isolation.
152	>	*
153	>	* <li>The documentation style for testcases is to provide as javadoc
154		* a simple sentence or two describing the property that the testcase
155		* method purports to test. The javadocs do not say anything about how
156	<	* the property is tested. To find out, read the code.</li>
156	>	* the property is tested. To find out, read the code.
157		*
158	<	* <li> These tests are "conformance tests", and do not attempt to
158	>	* <li>These tests are "conformance tests", and do not attempt to
159		* test throughput, latency, scalability or other performance factors
160		* (see the separate "jtreg" tests for a set intended to check these
161		* for the most central aspects of functionality.) So, most tests use
162		* the smallest sensible numbers of threads, collection sizes, etc
163	<	* needed to check basic conformance.</li>
163	>	* needed to check basic conformance.
164		*
165		* <li>The test classes currently do not declare inclusion in
166		* any particular package to simplify things for people integrating
167	<	* them in TCK test suites.</li>
167	>	* them in TCK test suites.
168		*
169	<	* <li> As a convenience, the <tt>main</tt> of this class (JSR166TestCase)
170	<	* runs all JSR166 unit tests.</li>
169	>	* <li>As a convenience, the {@code main} of this class (JSR166TestCase)
170	>	* runs all JSR166 unit tests.
171		*
172		* </ul>
173		*/
174		public class JSR166TestCase extends TestCase {
175	+	private static final boolean useSecurityManager =
176	+	Boolean.getBoolean("jsr166.useSecurityManager");
177	+
178	+	protected static final boolean expensiveTests =
179	+	Boolean.getBoolean("jsr166.expensiveTests");
180	+
181	+	/**
182	+	* If true, also run tests that are not part of the official tck
183	+	* because they test unspecified implementation details.
184	+	*/
185	+	protected static final boolean testImplementationDetails =
186	+	Boolean.getBoolean("jsr166.testImplementationDetails");
187	+
188		/**
189	<	* Runs all JSR166 unit tests using junit.textui.TestRunner
190	<	*/
191	<	public static void main (String[] args) {
192	<	junit.textui.TestRunner.run (suite());
189	>	* If true, report on stdout all "slow" tests, that is, ones that
190	>	* take more than profileThreshold milliseconds to execute.
191	>	*/
192	>	private static final boolean profileTests =
193	>	Boolean.getBoolean("jsr166.profileTests");
194	>
195	>	/**
196	>	* The number of milliseconds that tests are permitted for
197	>	* execution without being reported, when profileTests is set.
198	>	*/
199	>	private static final long profileThreshold =
200	>	Long.getLong("jsr166.profileThreshold", 100);
201	>
202	>	/**
203	>	* The number of repetitions per test (for tickling rare bugs).
204	>	*/
205	>	private static final int runsPerTest =
206	>	Integer.getInteger("jsr166.runsPerTest", 1);
207	>
208	>	/**
209	>	* The number of repetitions of the test suite (for finding leaks?).
210	>	*/
211	>	private static final int suiteRuns =
212	>	Integer.getInteger("jsr166.suiteRuns", 1);
213	>
214	>	/**
215	>	* Returns the value of the system property, or NaN if not defined.
216	>	*/
217	>	private static float systemPropertyValue(String name) {
218	>	String floatString = System.getProperty(name);
219	>	if (floatString == null)
220	>	return Float.NaN;
221	>	try {
222	>	return Float.parseFloat(floatString);
223	>	} catch (NumberFormatException ex) {
224	>	throw new IllegalArgumentException(
225	>	String.format("Bad float value in system property %s=%s",
226	>	name, floatString));
227	>	}
228	>	}
229	>
230	>	/**
231	>	* The scaling factor to apply to standard delays used in tests.
232	>	* May be initialized from any of:
233	>	* - the "jsr166.delay.factor" system property
234	>	* - the "test.timeout.factor" system property (as used by jtreg)
235	>	*   See: http://openjdk.java.net/jtreg/tag-spec.html
236	>	* - hard-coded fuzz factor when using a known slowpoke VM
237	>	*/
238	>	private static final float delayFactor = delayFactor();
239	>
240	>	private static float delayFactor() {
241	>	float x;
242	>	if (!Float.isNaN(x = systemPropertyValue("jsr166.delay.factor")))
243	>	return x;
244	>	if (!Float.isNaN(x = systemPropertyValue("test.timeout.factor")))
245	>	return x;
246	>	String prop = System.getProperty("java.vm.version");
247	>	if (prop != null && prop.matches(".*debug.*"))
248	>	return 4.0f; // How much slower is fastdebug than product?!
249	>	return 1.0f;
250	>	}
251	>
252	>	public JSR166TestCase() { super(); }
253	>	public JSR166TestCase(String name) { super(name); }
254	>
255	>	/**
256	>	* A filter for tests to run, matching strings of the form
257	>	* methodName(className), e.g. "testInvokeAll5(ForkJoinPoolTest)"
258	>	* Usefully combined with jsr166.runsPerTest.
259	>	*/
260	>	private static final Pattern methodFilter = methodFilter();
261	>
262	>	private static Pattern methodFilter() {
263	>	String regex = System.getProperty("jsr166.methodFilter");
264	>	return (regex == null) ? null : Pattern.compile(regex);
265	>	}
266	>
267	>	// Instrumentation to debug very rare, but very annoying hung test runs.
268	>	static volatile TestCase currentTestCase;
269	>	// static volatile int currentRun = 0;
270	>	static {
271	>	Runnable checkForWedgedTest = new Runnable() { public void run() {
272	>	// Avoid spurious reports with enormous runsPerTest.
273	>	// A single test case run should never take more than 1 second.
274	>	// But let's cap it at the high end too ...
275	>	final int timeoutMinutes =
276	>	Math.min(15, Math.max(runsPerTest / 60, 1));
277	>	for (TestCase lastTestCase = currentTestCase;;) {
278	>	try { MINUTES.sleep(timeoutMinutes); }
279	>	catch (InterruptedException unexpected) { break; }
280	>	if (lastTestCase == currentTestCase) {
281	>	System.err.printf(
282	>	"Looks like we're stuck running test: %s%n",
283	>	lastTestCase);
284	>	//                     System.err.printf(
285	>	//                         "Looks like we're stuck running test: %s (%d/%d)%n",
286	>	//                         lastTestCase, currentRun, runsPerTest);
287	>	//                     System.err.println("availableProcessors=" +
288	>	//                         Runtime.getRuntime().availableProcessors());
289	>	//                     System.err.printf("cpu model = %s%n", cpuModel());
290	>	dumpTestThreads();
291	>	// one stack dump is probably enough; more would be spam
292	>	break;
293	>	}
294	>	lastTestCase = currentTestCase;
295	>	}}};
296	>	Thread thread = new Thread(checkForWedgedTest, "checkForWedgedTest");
297	>	thread.setDaemon(true);
298	>	thread.start();
299	>	}
300	>
301	>	//     public static String cpuModel() {
302	>	//         try {
303	>	//             java.util.regex.Matcher matcher
304	>	//               = Pattern.compile("model name\\s*: (.*)")
305	>	//                 .matcher(new String(
306	>	//                     java.nio.file.Files.readAllBytes(
307	>	//                         java.nio.file.Paths.get("/proc/cpuinfo")), "UTF-8"));
308	>	//             matcher.find();
309	>	//             return matcher.group(1);
310	>	//         } catch (Exception ex) { return null; }
311	>	//     }
312	>
313	>	public void runBare() throws Throwable {
314	>	currentTestCase = this;
315	>	if (methodFilter == null
316	>	|| methodFilter.matcher(toString()).find())
317	>	super.runBare();
318	>	}
319	>
320	>	protected void runTest() throws Throwable {
321	>	for (int i = 0; i < runsPerTest; i++) {
322	>	// currentRun = i;
323	>	if (profileTests)
324	>	runTestProfiled();
325	>	else
326	>	super.runTest();
327	>	}
328	>	}
329	>
330	>	protected void runTestProfiled() throws Throwable {
331	>	for (int i = 0; i < 2; i++) {
332	>	long startTime = System.nanoTime();
333	>	super.runTest();
334	>	long elapsedMillis = millisElapsedSince(startTime);
335	>	if (elapsedMillis < profileThreshold)
336	>	break;
337	>	// Never report first run of any test; treat it as a
338	>	// warmup run, notably to trigger all needed classloading,
339	>	if (i > 0)
340	>	System.out.printf("%n%s: %d%n", toString(), elapsedMillis);
341	>	}
342	>	}
343	>
344	>	/**
345	>	* Runs all JSR166 unit tests using junit.textui.TestRunner.
346	>	*/
347	>	public static void main(String[] args) {
348	>	main(suite(), args);
349	>	}
350	>
351	>	static class PithyResultPrinter extends junit.textui.ResultPrinter {
352	>	PithyResultPrinter(java.io.PrintStream writer) { super(writer); }
353	>	long runTime;
354	>	public void startTest(Test test) {}
355	>	protected void printHeader(long runTime) {
356	>	this.runTime = runTime; // defer printing for later
357	>	}
358	>	protected void printFooter(TestResult result) {
359	>	if (result.wasSuccessful()) {
360	>	getWriter().println("OK (" + result.runCount() + " tests)"
361	>	+ "  Time: " + elapsedTimeAsString(runTime));
362	>	} else {
363	>	getWriter().println("Time: " + elapsedTimeAsString(runTime));
364	>	super.printFooter(result);
365	>	}
366	>	}
367	>	}
368	>
369	>	/**
370	>	* Returns a TestRunner that doesn't bother with unnecessary
371	>	* fluff, like printing a "." for each test case.
372	>	*/
373	>	static junit.textui.TestRunner newPithyTestRunner() {
374	>	junit.textui.TestRunner runner = new junit.textui.TestRunner();
375	>	runner.setPrinter(new PithyResultPrinter(System.out));
376	>	return runner;
377	>	}
378	>
379	>	/**
380	>	* Runs all unit tests in the given test suite.
381	>	* Actual behavior influenced by jsr166.* system properties.
382	>	*/
383	>	static void main(Test suite, String[] args) {
384	>	if (useSecurityManager) {
385	>	System.err.println("Setting a permissive security manager");
386	>	Policy.setPolicy(permissivePolicy());
387	>	System.setSecurityManager(new SecurityManager());
388	>	}
389	>	for (int i = 0; i < suiteRuns; i++) {
390	>	TestResult result = newPithyTestRunner().doRun(suite);
391	>	if (!result.wasSuccessful())
392	>	System.exit(1);
393	>	System.gc();
394	>	System.runFinalization();
395	>	}
396	>	}
397	>
398	>	public static TestSuite newTestSuite(Object... suiteOrClasses) {
399	>	TestSuite suite = new TestSuite();
400	>	for (Object suiteOrClass : suiteOrClasses) {
401	>	if (suiteOrClass instanceof TestSuite)
402	>	suite.addTest((TestSuite) suiteOrClass);
403	>	else if (suiteOrClass instanceof Class)
404	>	suite.addTest(new TestSuite((Class<?>) suiteOrClass));
405	>	else
406	>	throw new ClassCastException("not a test suite or class");
407	>	}
408	>	return suite;
409	>	}
410	>
411	>	public static void addNamedTestClasses(TestSuite suite,
412	>	String... testClassNames) {
413	>	for (String testClassName : testClassNames) {
414	>	try {
415	>	Class<?> testClass = Class.forName(testClassName);
416	>	Method m = testClass.getDeclaredMethod("suite",
417	>	new Class<?>[0]);
418	>	suite.addTest(newTestSuite((Test)m.invoke(null)));
419	>	} catch (Exception e) {
420	>	throw new Error("Missing test class", e);
421	>	}
422	>	}
423	>	}
424	>
425	>	public static final double JAVA_CLASS_VERSION;
426	>	public static final String JAVA_SPECIFICATION_VERSION;
427	>	static {
428	>	try {
429	>	JAVA_CLASS_VERSION = java.security.AccessController.doPrivileged(
430	>	new java.security.PrivilegedAction<Double>() {
431	>	public Double run() {
432	>	return Double.valueOf(System.getProperty("java.class.version"));}});
433	>	JAVA_SPECIFICATION_VERSION = java.security.AccessController.doPrivileged(
434	>	new java.security.PrivilegedAction<String>() {
435	>	public String run() {
436	>	return System.getProperty("java.specification.version");}});
437	>	} catch (Throwable t) {
438	>	throw new Error(t);
439	>	}
440	>	}
441	>
442	>	public static boolean atLeastJava6() { return JAVA_CLASS_VERSION >= 50.0; }
443	>	public static boolean atLeastJava7() { return JAVA_CLASS_VERSION >= 51.0; }
444	>	public static boolean atLeastJava8() { return JAVA_CLASS_VERSION >= 52.0; }
445	>	public static boolean atLeastJava9() {
446	>	return JAVA_CLASS_VERSION >= 53.0
447	>	// As of 2015-09, java9 still uses 52.0 class file version
448	>	|| JAVA_SPECIFICATION_VERSION.matches("^(1\\.)?(9|[0-9][0-9])$");
449	>	}
450	>	public static boolean atLeastJava10() {
451	>	return JAVA_CLASS_VERSION >= 54.0
452	>	|| JAVA_SPECIFICATION_VERSION.matches("^(1\\.)?[0-9][0-9]$");
453		}
454
455		/**
456	<	* Collects all JSR166 unit tests as one suite
457	<	*/
458	<	public static Test suite ( ) {
459	<	TestSuite suite = new TestSuite("JSR166 Unit Tests");
460	<
461	<	suite.addTest(new TestSuite(ArrayBlockingQueueTest.class));
462	<	suite.addTest(new TestSuite(AtomicBooleanTest.class));
463	<	suite.addTest(new TestSuite(AtomicIntegerArrayTest.class));
464	<	suite.addTest(new TestSuite(AtomicIntegerFieldUpdaterTest.class));
465	<	suite.addTest(new TestSuite(AtomicIntegerTest.class));
466	<	suite.addTest(new TestSuite(AtomicLongArrayTest.class));
467	<	suite.addTest(new TestSuite(AtomicLongFieldUpdaterTest.class));
468	<	suite.addTest(new TestSuite(AtomicLongTest.class));
469	<	suite.addTest(new TestSuite(AtomicMarkableReferenceTest.class));
470	<	suite.addTest(new TestSuite(AtomicReferenceArrayTest.class));
471	<	suite.addTest(new TestSuite(AtomicReferenceFieldUpdaterTest.class));
472	<	suite.addTest(new TestSuite(AtomicReferenceTest.class));
473	<	suite.addTest(new TestSuite(AtomicStampedReferenceTest.class));
474	<	suite.addTest(new TestSuite(CancellableTaskTest.class));
475	<	suite.addTest(new TestSuite(ConcurrentHashMapTest.class));
476	<	suite.addTest(new TestSuite(ConcurrentLinkedQueueTest.class));
477	<	suite.addTest(new TestSuite(CopyOnWriteArrayListTest.class));
478	<	suite.addTest(new TestSuite(CopyOnWriteArraySetTest.class));
479	<	suite.addTest(new TestSuite(CountDownLatchTest.class));
480	<	suite.addTest(new TestSuite(CyclicBarrierTest.class));
481	<	suite.addTest(new TestSuite(DelayQueueTest.class));
482	<	suite.addTest(new TestSuite(ExchangerTest.class));
483	<	suite.addTest(new TestSuite(ExecutorsTest.class));
484	<	suite.addTest(new TestSuite(FairSemaphoreTest.class));
485	<	suite.addTest(new TestSuite(FutureTaskTest.class));
486	<	suite.addTest(new TestSuite(LinkedBlockingQueueTest.class));
487	<	suite.addTest(new TestSuite(LinkedListTest.class));
488	<	suite.addTest(new TestSuite(LockSupportTest.class));
489	<	suite.addTest(new TestSuite(PriorityBlockingQueueTest.class));
490	<	suite.addTest(new TestSuite(PriorityQueueTest.class));
491	<	suite.addTest(new TestSuite(ReentrantLockTest.class));
492	<	suite.addTest(new TestSuite(ReentrantReadWriteLockTest.class));
493	<	suite.addTest(new TestSuite(ScheduledExecutorTest.class));
494	<	suite.addTest(new TestSuite(SemaphoreTest.class));
495	<	suite.addTest(new TestSuite(SynchronousQueueTest.class));
496	<	suite.addTest(new TestSuite(SystemTest.class));
497	<	suite.addTest(new TestSuite(ThreadLocalTest.class));
498	<	suite.addTest(new TestSuite(ThreadPoolExecutorTest.class));
499	<	suite.addTest(new TestSuite(ThreadTest.class));
500	<	suite.addTest(new TestSuite(TimeUnitTest.class));
501	<
456	>	* Collects all JSR166 unit tests as one suite.
457	>	*/
458	>	public static Test suite() {
459	>	// Java7+ test classes
460	>	TestSuite suite = newTestSuite(
461	>	ForkJoinPoolTest.suite(),
462	>	ForkJoinTaskTest.suite(),
463	>	RecursiveActionTest.suite(),
464	>	RecursiveTaskTest.suite(),
465	>	LinkedTransferQueueTest.suite(),
466	>	PhaserTest.suite(),
467	>	ThreadLocalRandomTest.suite(),
468	>	AbstractExecutorServiceTest.suite(),
469	>	AbstractQueueTest.suite(),
470	>	AbstractQueuedSynchronizerTest.suite(),
471	>	AbstractQueuedLongSynchronizerTest.suite(),
472	>	ArrayBlockingQueueTest.suite(),
473	>	ArrayDequeTest.suite(),
474	>	ArrayListTest.suite(),
475	>	AtomicBooleanTest.suite(),
476	>	AtomicIntegerArrayTest.suite(),
477	>	AtomicIntegerFieldUpdaterTest.suite(),
478	>	AtomicIntegerTest.suite(),
479	>	AtomicLongArrayTest.suite(),
480	>	AtomicLongFieldUpdaterTest.suite(),
481	>	AtomicLongTest.suite(),
482	>	AtomicMarkableReferenceTest.suite(),
483	>	AtomicReferenceArrayTest.suite(),
484	>	AtomicReferenceFieldUpdaterTest.suite(),
485	>	AtomicReferenceTest.suite(),
486	>	AtomicStampedReferenceTest.suite(),
487	>	ConcurrentHashMapTest.suite(),
488	>	ConcurrentLinkedDequeTest.suite(),
489	>	ConcurrentLinkedQueueTest.suite(),
490	>	ConcurrentSkipListMapTest.suite(),
491	>	ConcurrentSkipListSubMapTest.suite(),
492	>	ConcurrentSkipListSetTest.suite(),
493	>	ConcurrentSkipListSubSetTest.suite(),
494	>	CopyOnWriteArrayListTest.suite(),
495	>	CopyOnWriteArraySetTest.suite(),
496	>	CountDownLatchTest.suite(),
497	>	CountedCompleterTest.suite(),
498	>	CyclicBarrierTest.suite(),
499	>	DelayQueueTest.suite(),
500	>	EntryTest.suite(),
501	>	ExchangerTest.suite(),
502	>	ExecutorsTest.suite(),
503	>	ExecutorCompletionServiceTest.suite(),
504	>	FutureTaskTest.suite(),
505	>	LinkedBlockingDequeTest.suite(),
506	>	LinkedBlockingQueueTest.suite(),
507	>	LinkedListTest.suite(),
508	>	LockSupportTest.suite(),
509	>	PriorityBlockingQueueTest.suite(),
510	>	PriorityQueueTest.suite(),
511	>	ReentrantLockTest.suite(),
512	>	ReentrantReadWriteLockTest.suite(),
513	>	ScheduledExecutorTest.suite(),
514	>	ScheduledExecutorSubclassTest.suite(),
515	>	SemaphoreTest.suite(),
516	>	SynchronousQueueTest.suite(),
517	>	SystemTest.suite(),
518	>	ThreadLocalTest.suite(),
519	>	ThreadPoolExecutorTest.suite(),
520	>	ThreadPoolExecutorSubclassTest.suite(),
521	>	ThreadTest.suite(),
522	>	TimeUnitTest.suite(),
523	>	TreeMapTest.suite(),
524	>	TreeSetTest.suite(),
525	>	TreeSubMapTest.suite(),
526	>	TreeSubSetTest.suite(),
527	>	VectorTest.suite());
528	>
529	>	// Java8+ test classes
530	>	if (atLeastJava8()) {
531	>	String[] java8TestClassNames = {
532	>	"ArrayDeque8Test",
533	>	"Atomic8Test",
534	>	"CompletableFutureTest",
535	>	"ConcurrentHashMap8Test",
536	>	"CountedCompleter8Test",
537	>	"DoubleAccumulatorTest",
538	>	"DoubleAdderTest",
539	>	"ForkJoinPool8Test",
540	>	"ForkJoinTask8Test",
541	>	"LinkedBlockingDeque8Test",
542	>	"LinkedBlockingQueue8Test",
543	>	"LongAccumulatorTest",
544	>	"LongAdderTest",
545	>	"SplittableRandomTest",
546	>	"StampedLockTest",
547	>	"SubmissionPublisherTest",
548	>	"ThreadLocalRandom8Test",
549	>	"TimeUnit8Test",
550	>	};
551	>	addNamedTestClasses(suite, java8TestClassNames);
552	>	}
553	>
554	>	// Java9+ test classes
555	>	if (atLeastJava9()) {
556	>	String[] java9TestClassNames = {
557	>	"AtomicBoolean9Test",
558	>	"AtomicInteger9Test",
559	>	"AtomicIntegerArray9Test",
560	>	"AtomicLong9Test",
561	>	"AtomicLongArray9Test",
562	>	"AtomicReference9Test",
563	>	"AtomicReferenceArray9Test",
564	>	"ExecutorCompletionService9Test",
565	>	"ForkJoinPool9Test",
566	>	};
567	>	addNamedTestClasses(suite, java9TestClassNames);
568	>	}
569	>
570		return suite;
571		}
572
573	+	/** Returns list of junit-style test method names in given class. */
574	+	public static ArrayList<String> testMethodNames(Class<?> testClass) {
575	+	Method[] methods = testClass.getDeclaredMethods();
576	+	ArrayList<String> names = new ArrayList<>(methods.length);
577	+	for (Method method : methods) {
578	+	if (method.getName().startsWith("test")
579	+	&& Modifier.isPublic(method.getModifiers())
580	+	// method.getParameterCount() requires jdk8+
581	+	&& method.getParameterTypes().length == 0) {
582	+	names.add(method.getName());
583	+	}
584	+	}
585	+	return names;
586	+	}
587	+
588	+	/**
589	+	* Returns junit-style testSuite for the given test class, but
590	+	* parameterized by passing extra data to each test.
591	+	*/
592	+	public static <ExtraData> Test parameterizedTestSuite
593	+	(Class<? extends JSR166TestCase> testClass,
594	+	Class<ExtraData> dataClass,
595	+	ExtraData data) {
596	+	try {
597	+	TestSuite suite = new TestSuite();
598	+	Constructor c =
599	+	testClass.getDeclaredConstructor(dataClass, String.class);
600	+	for (String methodName : testMethodNames(testClass))
601	+	suite.addTest((Test) c.newInstance(data, methodName));
602	+	return suite;
603	+	} catch (Exception e) {
604	+	throw new Error(e);
605	+	}
606	+	}
607	+
608	+	/**
609	+	* Returns junit-style testSuite for the jdk8 extension of the
610	+	* given test class, but parameterized by passing extra data to
611	+	* each test.  Uses reflection to allow compilation in jdk7.
612	+	*/
613	+	public static <ExtraData> Test jdk8ParameterizedTestSuite
614	+	(Class<? extends JSR166TestCase> testClass,
615	+	Class<ExtraData> dataClass,
616	+	ExtraData data) {
617	+	if (atLeastJava8()) {
618	+	String name = testClass.getName();
619	+	String name8 = name.replaceAll("Test$", "8Test");
620	+	if (name.equals(name8)) throw new Error(name);
621	+	try {
622	+	return (Test)
623	+	Class.forName(name8)
624	+	.getMethod("testSuite", new Class[] { dataClass })
625	+	.invoke(null, data);
626	+	} catch (Exception e) {
627	+	throw new Error(e);
628	+	}
629	+	} else {
630	+	return new TestSuite();
631	+	}
632	+	}
633	+
634	+	// Delays for timing-dependent tests, in milliseconds.
635
636		public static long SHORT_DELAY_MS;
637		public static long SMALL_DELAY_MS;
638		public static long MEDIUM_DELAY_MS;
639		public static long LONG_DELAY_MS;
640
151	–
641		/**
642	<	* Return the shortest timed delay. This could
643	<	* be reimplmented to use for example a Property.
644	<	*/
642	>	* Returns the shortest timed delay. This can be scaled up for
643	>	* slow machines using the jsr166.delay.factor system property,
644	>	* or via jtreg's -timeoutFactor: flag.
645	>	* http://openjdk.java.net/jtreg/command-help.html
646	>	*/
647		protected long getShortDelay() {
648	<	return 100;
648	>	return (long) (50 * delayFactor);
649		}
650
160	–
651		/**
652	<	* Set delays as multiples of SHORT_DELAY.
652	>	* Sets delays as multiples of SHORT_DELAY.
653		*/
654	<	protected  void setDelays() {
654	>	protected void setDelays() {
655		SHORT_DELAY_MS = getShortDelay();
656	<	SMALL_DELAY_MS = SHORT_DELAY_MS * 5;
656	>	SMALL_DELAY_MS  = SHORT_DELAY_MS * 5;
657		MEDIUM_DELAY_MS = SHORT_DELAY_MS * 10;
658	<	LONG_DELAY_MS = SHORT_DELAY_MS * 50;
658	>	LONG_DELAY_MS   = SHORT_DELAY_MS * 200;
659	>	}
660	>
661	>	/**
662	>	* Returns a timeout in milliseconds to be used in tests that
663	>	* verify that operations block or time out.
664	>	*/
665	>	long timeoutMillis() {
666	>	return SHORT_DELAY_MS / 4;
667	>	}
668	>
669	>	/**
670	>	* Returns a new Date instance representing a time at least
671	>	* delayMillis milliseconds in the future.
672	>	*/
673	>	Date delayedDate(long delayMillis) {
674	>	// Add 1 because currentTimeMillis is known to round into the past.
675	>	return new Date(System.currentTimeMillis() + delayMillis + 1);
676		}
677
678		/**
679	<	* Flag set true if any threadAssert methods fail
679	>	* The first exception encountered if any threadAssertXXX method fails.
680		*/
681	<	volatile boolean threadFailed;
681	>	private final AtomicReference<Throwable> threadFailure
682	>	= new AtomicReference<>(null);
683
684		/**
685	<	* Initialize test to indicate that no thread assertions have failed
685	>	* Records an exception so that it can be rethrown later in the test
686	>	* harness thread, triggering a test case failure.  Only the first
687	>	* failure is recorded; subsequent calls to this method from within
688	>	* the same test have no effect.
689		*/
690	<	public void setUp() {
690	>	public void threadRecordFailure(Throwable t) {
691	>	System.err.println(t);
692	>	dumpTestThreads();
693	>	threadFailure.compareAndSet(null, t);
694	>	}
695	>
696	>	public void setUp() {
697		setDelays();
698	<	threadFailed = false;
698	>	}
699	>
700	>	void tearDownFail(String format, Object... args) {
701	>	String msg = toString() + ": " + String.format(format, args);
702	>	System.err.println(msg);
703	>	dumpTestThreads();
704	>	throw new AssertionFailedError(msg);
705		}
706
707		/**
708	<	* Trigger test case failure if any thread assertions have failed
708	>	* Extra checks that get done for all test cases.
709	>	*
710	>	* Triggers test case failure if any thread assertions have failed,
711	>	* by rethrowing, in the test harness thread, any exception recorded
712	>	* earlier by threadRecordFailure.
713	>	*
714	>	* Triggers test case failure if interrupt status is set in the main thread.
715		*/
716	<	public void tearDown() {
717	<	assertFalse(threadFailed);
716	>	public void tearDown() throws Exception {
717	>	Throwable t = threadFailure.getAndSet(null);
718	>	if (t != null) {
719	>	if (t instanceof Error)
720	>	throw (Error) t;
721	>	else if (t instanceof RuntimeException)
722	>	throw (RuntimeException) t;
723	>	else if (t instanceof Exception)
724	>	throw (Exception) t;
725	>	else {
726	>	AssertionFailedError afe =
727	>	new AssertionFailedError(t.toString());
728	>	afe.initCause(t);
729	>	throw afe;
730	>	}
731	>	}
732	>
733	>	if (Thread.interrupted())
734	>	tearDownFail("interrupt status set in main thread");
735	>
736	>	checkForkJoinPoolThreadLeaks();
737		}
738
739		/**
740	<	* Fail, also setting status to indicate current testcase should fail
741	<	*/
740	>	* Finds missing PoolCleaners
741	>	*/
742	>	void checkForkJoinPoolThreadLeaks() throws InterruptedException {
743	>	Thread[] survivors = new Thread[7];
744	>	int count = Thread.enumerate(survivors);
745	>	for (int i = 0; i < count; i++) {
746	>	Thread thread = survivors[i];
747	>	String name = thread.getName();
748	>	if (name.startsWith("ForkJoinPool-")) {
749	>	// give thread some time to terminate
750	>	thread.join(LONG_DELAY_MS);
751	>	if (thread.isAlive())
752	>	tearDownFail("Found leaked ForkJoinPool thread thread=%s",
753	>	thread);
754	>	}
755	>	}
756	>
757	>	if (!ForkJoinPool.commonPool()
758	>	.awaitQuiescence(LONG_DELAY_MS, MILLISECONDS))
759	>	tearDownFail("ForkJoin common pool thread stuck");
760	>	}
761	>
762	>	/**
763	>	* Just like fail(reason), but additionally recording (using
764	>	* threadRecordFailure) any AssertionFailedError thrown, so that
765	>	* the current testcase will fail.
766	>	*/
767		public void threadFail(String reason) {
768	<	threadFailed = true;
769	<	fail(reason);
768	>	try {
769	>	fail(reason);
770	>	} catch (AssertionFailedError t) {
771	>	threadRecordFailure(t);
772	>	throw t;
773	>	}
774		}
775
776		/**
777	<	* If expression not true, set status to indicate current testcase
778	<	* should fail
779	<	*/
777	>	* Just like assertTrue(b), but additionally recording (using
778	>	* threadRecordFailure) any AssertionFailedError thrown, so that
779	>	* the current testcase will fail.
780	>	*/
781		public void threadAssertTrue(boolean b) {
782	<	if (!b) {
205	<	threadFailed = true;
782	>	try {
783		assertTrue(b);
784	+	} catch (AssertionFailedError t) {
785	+	threadRecordFailure(t);
786	+	throw t;
787		}
788		}
789
790		/**
791	<	* If expression not false, set status to indicate current testcase
792	<	* should fail
793	<	*/
791	>	* Just like assertFalse(b), but additionally recording (using
792	>	* threadRecordFailure) any AssertionFailedError thrown, so that
793	>	* the current testcase will fail.
794	>	*/
795		public void threadAssertFalse(boolean b) {
796	<	if (b) {
216	<	threadFailed = true;
796	>	try {
797		assertFalse(b);
798	+	} catch (AssertionFailedError t) {
799	+	threadRecordFailure(t);
800	+	throw t;
801		}
802		}
803
804		/**
805	<	* If argument not null, set status to indicate current testcase
806	<	* should fail
807	<	*/
805	>	* Just like assertNull(x), but additionally recording (using
806	>	* threadRecordFailure) any AssertionFailedError thrown, so that
807	>	* the current testcase will fail.
808	>	*/
809		public void threadAssertNull(Object x) {
810	<	if (x != null) {
227	<	threadFailed = true;
810	>	try {
811		assertNull(x);
812	+	} catch (AssertionFailedError t) {
813	+	threadRecordFailure(t);
814	+	throw t;
815		}
816		}
817
818		/**
819	<	* If arguments not equal, set status to indicate current testcase
820	<	* should fail
821	<	*/
819	>	* Just like assertEquals(x, y), but additionally recording (using
820	>	* threadRecordFailure) any AssertionFailedError thrown, so that
821	>	* the current testcase will fail.
822	>	*/
823		public void threadAssertEquals(long x, long y) {
824	<	if (x != y) {
238	<	threadFailed = true;
824	>	try {
825		assertEquals(x, y);
826	+	} catch (AssertionFailedError t) {
827	+	threadRecordFailure(t);
828	+	throw t;
829		}
830		}
831
832		/**
833	<	* If arguments not equal, set status to indicate current testcase
834	<	* should fail
835	<	*/
833	>	* Just like assertEquals(x, y), but additionally recording (using
834	>	* threadRecordFailure) any AssertionFailedError thrown, so that
835	>	* the current testcase will fail.
836	>	*/
837		public void threadAssertEquals(Object x, Object y) {
838	<	if (x != y && (x == null || !x.equals(y))) {
249	<	threadFailed = true;
838	>	try {
839		assertEquals(x, y);
840	+	} catch (AssertionFailedError fail) {
841	+	threadRecordFailure(fail);
842	+	throw fail;
843	+	} catch (Throwable fail) {
844	+	threadUnexpectedException(fail);
845	+	}
846	+	}
847	+
848	+	/**
849	+	* Just like assertSame(x, y), but additionally recording (using
850	+	* threadRecordFailure) any AssertionFailedError thrown, so that
851	+	* the current testcase will fail.
852	+	*/
853	+	public void threadAssertSame(Object x, Object y) {
854	+	try {
855	+	assertSame(x, y);
856	+	} catch (AssertionFailedError fail) {
857	+	threadRecordFailure(fail);
858	+	throw fail;
859		}
860		}
861
862		/**
863	<	* threadFail with message "should throw exception"
864	<	*/
863	>	* Calls threadFail with message "should throw exception".
864	>	*/
865		public void threadShouldThrow() {
866	<	threadFailed = true;
259	<	fail("should throw exception");
866	>	threadFail("should throw exception");
867		}
868
869		/**
870	<	* threadFail with message "Unexpected exception"
870	>	* Calls threadFail with message "should throw" + exceptionName.
871		*/
872	<	public void threadUnexpectedException() {
873	<	threadFailed = true;
267	<	fail("Unexpected exception");
872	>	public void threadShouldThrow(String exceptionName) {
873	>	threadFail("should throw " + exceptionName);
874		}
875
876	+	/**
877	+	* Records the given exception using {@link #threadRecordFailure},
878	+	* then rethrows the exception, wrapping it in an
879	+	* AssertionFailedError if necessary.
880	+	*/
881	+	public void threadUnexpectedException(Throwable t) {
882	+	threadRecordFailure(t);
883	+	t.printStackTrace();
884	+	if (t instanceof RuntimeException)
885	+	throw (RuntimeException) t;
886	+	else if (t instanceof Error)
887	+	throw (Error) t;
888	+	else {
889	+	AssertionFailedError afe =
890	+	new AssertionFailedError("unexpected exception: " + t);
891	+	afe.initCause(t);
892	+	throw afe;
893	+	}
894	+	}
895
896		/**
897	<	* Wait out termination of a thread pool or fail doing so
897	>	* Delays, via Thread.sleep, for the given millisecond delay, but
898	>	* if the sleep is shorter than specified, may re-sleep or yield
899	>	* until time elapses.  Ensures that the given time, as measured
900	>	* by System.nanoTime(), has elapsed.
901		*/
902	<	public void joinPool(ExecutorService exec) {
902	>	static void delay(long millis) throws InterruptedException {
903	>	long nanos = millis * (1000 * 1000);
904	>	final long wakeupTime = System.nanoTime() + nanos;
905	>	do {
906	>	if (millis > 0L)
907	>	Thread.sleep(millis);
908	>	else // too short to sleep
909	>	Thread.yield();
910	>	nanos = wakeupTime - System.nanoTime();
911	>	millis = nanos / (1000 * 1000);
912	>	} while (nanos >= 0L);
913	>	}
914	>
915	>	/**
916	>	* Allows use of try-with-resources with per-test thread pools.
917	>	*/
918	>	class PoolCleaner implements AutoCloseable {
919	>	private final ExecutorService pool;
920	>	public PoolCleaner(ExecutorService pool) { this.pool = pool; }
921	>	public void close() { joinPool(pool); }
922	>	}
923	>
924	>	/**
925	>	* An extension of PoolCleaner that has an action to release the pool.
926	>	*/
927	>	class PoolCleanerWithReleaser extends PoolCleaner {
928	>	private final Runnable releaser;
929	>	public PoolCleanerWithReleaser(ExecutorService pool, Runnable releaser) {
930	>	super(pool);
931	>	this.releaser = releaser;
932	>	}
933	>	public void close() {
934	>	try {
935	>	releaser.run();
936	>	} finally {
937	>	super.close();
938	>	}
939	>	}
940	>	}
941	>
942	>	PoolCleaner cleaner(ExecutorService pool) {
943	>	return new PoolCleaner(pool);
944	>	}
945	>
946	>	PoolCleaner cleaner(ExecutorService pool, Runnable releaser) {
947	>	return new PoolCleanerWithReleaser(pool, releaser);
948	>	}
949	>
950	>	PoolCleaner cleaner(ExecutorService pool, CountDownLatch latch) {
951	>	return new PoolCleanerWithReleaser(pool, releaser(latch));
952	>	}
953	>
954	>	Runnable releaser(final CountDownLatch latch) {
955	>	return new Runnable() { public void run() {
956	>	do { latch.countDown(); }
957	>	while (latch.getCount() > 0);
958	>	}};
959	>	}
960	>
961	>	PoolCleaner cleaner(ExecutorService pool, AtomicBoolean flag) {
962	>	return new PoolCleanerWithReleaser(pool, releaser(flag));
963	>	}
964	>
965	>	Runnable releaser(final AtomicBoolean flag) {
966	>	return new Runnable() { public void run() { flag.set(true); }};
967	>	}
968	>
969	>	/**
970	>	* Waits out termination of a thread pool or fails doing so.
971	>	*/
972	>	void joinPool(ExecutorService pool) {
973		try {
974	<	exec.shutdown();
975	<	assertTrue(exec.awaitTermination(LONG_DELAY_MS, TimeUnit.MILLISECONDS));
976	<	} catch(InterruptedException ie) {
977	<	fail("Unexpected exception");
974	>	pool.shutdown();
975	>	if (!pool.awaitTermination(2 * LONG_DELAY_MS, MILLISECONDS)) {
976	>	try {
977	>	threadFail("ExecutorService " + pool +
978	>	" did not terminate in a timely manner");
979	>	} finally {
980	>	// last resort, for the benefit of subsequent tests
981	>	pool.shutdownNow();
982	>	pool.awaitTermination(MEDIUM_DELAY_MS, MILLISECONDS);
983	>	}
984	>	}
985	>	} catch (SecurityException ok) {
986	>	// Allowed in case test doesn't have privs
987	>	} catch (InterruptedException fail) {
988	>	threadFail("Unexpected InterruptedException");
989		}
990		}
991
992	+	/**
993	+	* Like Runnable, but with the freedom to throw anything.
994	+	* junit folks had the same idea:
995	+	* http://junit.org/junit5/docs/snapshot/api/org/junit/gen5/api/Executable.html
996	+	*/
997	+	interface Action { public void run() throws Throwable; }
998
999		/**
1000	<	* fail with message "should throw exception"
1001	<	*/
1000	>	* Runs all the given actions in parallel, failing if any fail.
1001	>	* Useful for running multiple variants of tests that are
1002	>	* necessarily individually slow because they must block.
1003	>	*/
1004	>	void testInParallel(Action ... actions) {
1005	>	ExecutorService pool = Executors.newCachedThreadPool();
1006	>	try (PoolCleaner cleaner = cleaner(pool)) {
1007	>	ArrayList<Future<?>> futures = new ArrayList<>(actions.length);
1008	>	for (final Action action : actions)
1009	>	futures.add(pool.submit(new CheckedRunnable() {
1010	>	public void realRun() throws Throwable { action.run();}}));
1011	>	for (Future<?> future : futures)
1012	>	try {
1013	>	assertNull(future.get(LONG_DELAY_MS, MILLISECONDS));
1014	>	} catch (ExecutionException ex) {
1015	>	threadUnexpectedException(ex.getCause());
1016	>	} catch (Exception ex) {
1017	>	threadUnexpectedException(ex);
1018	>	}
1019	>	}
1020	>	}
1021	>
1022	>	/**
1023	>	* A debugging tool to print stack traces of most threads, as jstack does.
1024	>	* Uninteresting threads are filtered out.
1025	>	*/
1026	>	static void dumpTestThreads() {
1027	>	SecurityManager sm = System.getSecurityManager();
1028	>	if (sm != null) {
1029	>	try {
1030	>	System.setSecurityManager(null);
1031	>	} catch (SecurityException giveUp) {
1032	>	return;
1033	>	}
1034	>	}
1035	>
1036	>	ThreadMXBean threadMXBean = ManagementFactory.getThreadMXBean();
1037	>	System.err.println("------ stacktrace dump start ------");
1038	>	for (ThreadInfo info : threadMXBean.dumpAllThreads(true, true)) {
1039	>	final String name = info.getThreadName();
1040	>	String lockName;
1041	>	if ("Signal Dispatcher".equals(name))
1042	>	continue;
1043	>	if ("Reference Handler".equals(name)
1044	>	&& (lockName = info.getLockName()) != null
1045	>	&& lockName.startsWith("java.lang.ref.Reference$Lock"))
1046	>	continue;
1047	>	if ("Finalizer".equals(name)
1048	>	&& (lockName = info.getLockName()) != null
1049	>	&& lockName.startsWith("java.lang.ref.ReferenceQueue$Lock"))
1050	>	continue;
1051	>	if ("checkForWedgedTest".equals(name))
1052	>	continue;
1053	>	System.err.print(info);
1054	>	}
1055	>	System.err.println("------ stacktrace dump end ------");
1056	>
1057	>	if (sm != null) System.setSecurityManager(sm);
1058	>	}
1059	>
1060	>	/**
1061	>	* Checks that thread does not terminate within the default
1062	>	* millisecond delay of {@code timeoutMillis()}.
1063	>	*/
1064	>	void assertThreadStaysAlive(Thread thread) {
1065	>	assertThreadStaysAlive(thread, timeoutMillis());
1066	>	}
1067	>
1068	>	/**
1069	>	* Checks that thread does not terminate within the given millisecond delay.
1070	>	*/
1071	>	void assertThreadStaysAlive(Thread thread, long millis) {
1072	>	try {
1073	>	// No need to optimize the failing case via Thread.join.
1074	>	delay(millis);
1075	>	assertTrue(thread.isAlive());
1076	>	} catch (InterruptedException fail) {
1077	>	threadFail("Unexpected InterruptedException");
1078	>	}
1079	>	}
1080	>
1081	>	/**
1082	>	* Checks that the threads do not terminate within the default
1083	>	* millisecond delay of {@code timeoutMillis()}.
1084	>	*/
1085	>	void assertThreadsStayAlive(Thread... threads) {
1086	>	assertThreadsStayAlive(timeoutMillis(), threads);
1087	>	}
1088	>
1089	>	/**
1090	>	* Checks that the threads do not terminate within the given millisecond delay.
1091	>	*/
1092	>	void assertThreadsStayAlive(long millis, Thread... threads) {
1093	>	try {
1094	>	// No need to optimize the failing case via Thread.join.
1095	>	delay(millis);
1096	>	for (Thread thread : threads)
1097	>	assertTrue(thread.isAlive());
1098	>	} catch (InterruptedException fail) {
1099	>	threadFail("Unexpected InterruptedException");
1100	>	}
1101	>	}
1102	>
1103	>	/**
1104	>	* Checks that future.get times out, with the default timeout of
1105	>	* {@code timeoutMillis()}.
1106	>	*/
1107	>	void assertFutureTimesOut(Future future) {
1108	>	assertFutureTimesOut(future, timeoutMillis());
1109	>	}
1110	>
1111	>	/**
1112	>	* Checks that future.get times out, with the given millisecond timeout.
1113	>	*/
1114	>	void assertFutureTimesOut(Future future, long timeoutMillis) {
1115	>	long startTime = System.nanoTime();
1116	>	try {
1117	>	future.get(timeoutMillis, MILLISECONDS);
1118	>	shouldThrow();
1119	>	} catch (TimeoutException success) {
1120	>	} catch (Exception fail) {
1121	>	threadUnexpectedException(fail);
1122	>	} finally { future.cancel(true); }
1123	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
1124	>	}
1125	>
1126	>	/**
1127	>	* Fails with message "should throw exception".
1128	>	*/
1129		public void shouldThrow() {
1130		fail("Should throw exception");
1131		}
1132
1133		/**
1134	<	* fail with message "Unexpected exception"
1134	>	* Fails with message "should throw " + exceptionName.
1135		*/
1136	<	public void unexpectedException() {
1137	<	fail("Unexpected exception");
1136	>	public void shouldThrow(String exceptionName) {
1137	>	fail("Should throw " + exceptionName);
1138		}
1139
298	–
1140		/**
1141		* The number of elements to place in collections, arrays, etc.
1142		*/
1143	<	static final int SIZE = 20;
1143	>	public static final int SIZE = 20;
1144
1145		// Some convenient Integer constants
1146
1147	<	static final Integer zero = new Integer(0);
1148	<	static final Integer one = new Integer(1);
1149	<	static final Integer two = new Integer(2);
1150	<	static final Integer three  = new Integer(3);
1151	<	static final Integer four  = new Integer(4);
1152	<	static final Integer five  = new Integer(5);
1153	<	static final Integer six = new Integer(6);
1154	<	static final Integer seven = new Integer(7);
1155	<	static final Integer eight = new Integer(8);
1156	<	static final Integer nine = new Integer(9);
1157	<	static final Integer m1  = new Integer(-1);
1158	<	static final Integer m2  = new Integer(-2);
1159	<	static final Integer m3  = new Integer(-3);
1160	<	static final Integer m4 = new Integer(-4);
1161	<	static final Integer m5 = new Integer(-5);
1162	<	static final Integer m10 = new Integer(-10);
1147	>	public static final Integer zero  = new Integer(0);
1148	>	public static final Integer one   = new Integer(1);
1149	>	public static final Integer two   = new Integer(2);
1150	>	public static final Integer three = new Integer(3);
1151	>	public static final Integer four  = new Integer(4);
1152	>	public static final Integer five  = new Integer(5);
1153	>	public static final Integer six   = new Integer(6);
1154	>	public static final Integer seven = new Integer(7);
1155	>	public static final Integer eight = new Integer(8);
1156	>	public static final Integer nine  = new Integer(9);
1157	>	public static final Integer m1  = new Integer(-1);
1158	>	public static final Integer m2  = new Integer(-2);
1159	>	public static final Integer m3  = new Integer(-3);
1160	>	public static final Integer m4  = new Integer(-4);
1161	>	public static final Integer m5  = new Integer(-5);
1162	>	public static final Integer m6  = new Integer(-6);
1163	>	public static final Integer m10 = new Integer(-10);
1164	>
1165	>	/**
1166	>	* Runs Runnable r with a security policy that permits precisely
1167	>	* the specified permissions.  If there is no current security
1168	>	* manager, the runnable is run twice, both with and without a
1169	>	* security manager.  We require that any security manager permit
1170	>	* getPolicy/setPolicy.
1171	>	*/
1172	>	public void runWithPermissions(Runnable r, Permission... permissions) {
1173	>	SecurityManager sm = System.getSecurityManager();
1174	>	if (sm == null) {
1175	>	r.run();
1176	>	}
1177	>	runWithSecurityManagerWithPermissions(r, permissions);
1178	>	}
1179
1180	+	/**
1181	+	* Runs Runnable r with a security policy that permits precisely
1182	+	* the specified permissions.  If there is no current security
1183	+	* manager, a temporary one is set for the duration of the
1184	+	* Runnable.  We require that any security manager permit
1185	+	* getPolicy/setPolicy.
1186	+	*/
1187	+	public void runWithSecurityManagerWithPermissions(Runnable r,
1188	+	Permission... permissions) {
1189	+	SecurityManager sm = System.getSecurityManager();
1190	+	if (sm == null) {
1191	+	Policy savedPolicy = Policy.getPolicy();
1192	+	try {
1193	+	Policy.setPolicy(permissivePolicy());
1194	+	System.setSecurityManager(new SecurityManager());
1195	+	runWithSecurityManagerWithPermissions(r, permissions);
1196	+	} finally {
1197	+	System.setSecurityManager(null);
1198	+	Policy.setPolicy(savedPolicy);
1199	+	}
1200	+	} else {
1201	+	Policy savedPolicy = Policy.getPolicy();
1202	+	AdjustablePolicy policy = new AdjustablePolicy(permissions);
1203	+	Policy.setPolicy(policy);
1204
1205	<	// Some convenient Runnable classes
1205	>	try {
1206	>	r.run();
1207	>	} finally {
1208	>	policy.addPermission(new SecurityPermission("setPolicy"));
1209	>	Policy.setPolicy(savedPolicy);
1210	>	}
1211	>	}
1212	>	}
1213
1214	<	static class NoOpRunnable implements Runnable {
1215	<	public void run() {}
1214	>	/**
1215	>	* Runs a runnable without any permissions.
1216	>	*/
1217	>	public void runWithoutPermissions(Runnable r) {
1218	>	runWithPermissions(r);
1219		}
1220
1221	<	static class NoOpCallable implements Callable {
1222	<	public Object call() { return Boolean.TRUE; }
1221	>	/**
1222	>	* A security policy where new permissions can be dynamically added
1223	>	* or all cleared.
1224	>	*/
1225	>	public static class AdjustablePolicy extends java.security.Policy {
1226	>	Permissions perms = new Permissions();
1227	>	AdjustablePolicy(Permission... permissions) {
1228	>	for (Permission permission : permissions)
1229	>	perms.add(permission);
1230	>	}
1231	>	void addPermission(Permission perm) { perms.add(perm); }
1232	>	void clearPermissions() { perms = new Permissions(); }
1233	>	public PermissionCollection getPermissions(CodeSource cs) {
1234	>	return perms;
1235	>	}
1236	>	public PermissionCollection getPermissions(ProtectionDomain pd) {
1237	>	return perms;
1238	>	}
1239	>	public boolean implies(ProtectionDomain pd, Permission p) {
1240	>	return perms.implies(p);
1241	>	}
1242	>	public void refresh() {}
1243	>	public String toString() {
1244	>	List<Permission> ps = new ArrayList<>();
1245	>	for (Enumeration<Permission> e = perms.elements(); e.hasMoreElements();)
1246	>	ps.add(e.nextElement());
1247	>	return "AdjustablePolicy with permissions " + ps;
1248	>	}
1249		}
1250
1251	<	class ShortRunnable implements Runnable {
1252	<	public void run() {
1253	<	try {
1254	<	Thread.sleep(SHORT_DELAY_MS);
1255	<	}
1256	<	catch(Exception e) {
1257	<	threadUnexpectedException();
1251	>	/**
1252	>	* Returns a policy containing all the permissions we ever need.
1253	>	*/
1254	>	public static Policy permissivePolicy() {
1255	>	return new AdjustablePolicy
1256	>	// Permissions j.u.c. needs directly
1257	>	(new RuntimePermission("modifyThread"),
1258	>	new RuntimePermission("getClassLoader"),
1259	>	new RuntimePermission("setContextClassLoader"),
1260	>	// Permissions needed to change permissions!
1261	>	new SecurityPermission("getPolicy"),
1262	>	new SecurityPermission("setPolicy"),
1263	>	new RuntimePermission("setSecurityManager"),
1264	>	// Permissions needed by the junit test harness
1265	>	new RuntimePermission("accessDeclaredMembers"),
1266	>	new PropertyPermission("*", "read"),
1267	>	new java.io.FilePermission("<<ALL FILES>>", "read"));
1268	>	}
1269	>
1270	>	/**
1271	>	* Sleeps until the given time has elapsed.
1272	>	* Throws AssertionFailedError if interrupted.
1273	>	*/
1274	>	static void sleep(long millis) {
1275	>	try {
1276	>	delay(millis);
1277	>	} catch (InterruptedException fail) {
1278	>	AssertionFailedError afe =
1279	>	new AssertionFailedError("Unexpected InterruptedException");
1280	>	afe.initCause(fail);
1281	>	throw afe;
1282	>	}
1283	>	}
1284	>
1285	>	/**
1286	>	* Spin-waits up to the specified number of milliseconds for the given
1287	>	* thread to enter a wait state: BLOCKED, WAITING, or TIMED_WAITING.
1288	>	*/
1289	>	void waitForThreadToEnterWaitState(Thread thread, long timeoutMillis) {
1290	>	long startTime = 0L;
1291	>	for (;;) {
1292	>	Thread.State s = thread.getState();
1293	>	if (s == Thread.State.BLOCKED ||
1294	>	s == Thread.State.WAITING ||
1295	>	s == Thread.State.TIMED_WAITING)
1296	>	return;
1297	>	else if (s == Thread.State.TERMINATED)
1298	>	fail("Unexpected thread termination");
1299	>	else if (startTime == 0L)
1300	>	startTime = System.nanoTime();
1301	>	else if (millisElapsedSince(startTime) > timeoutMillis) {
1302	>	threadAssertTrue(thread.isAlive());
1303	>	fail("timed out waiting for thread to enter wait state");
1304		}
1305	+	Thread.yield();
1306		}
1307		}
1308
1309	<	class ShortInterruptedRunnable implements Runnable {
1310	<	public void run() {
1311	<	try {
1312	<	Thread.sleep(SHORT_DELAY_MS);
1313	<	threadShouldThrow();
1309	>	/**
1310	>	* Spin-waits up to the specified number of milliseconds for the given
1311	>	* thread to enter a wait state: BLOCKED, WAITING, or TIMED_WAITING,
1312	>	* and additionally satisfy the given condition.
1313	>	*/
1314	>	void waitForThreadToEnterWaitState(
1315	>	Thread thread, long timeoutMillis, Callable<Boolean> waitingForGodot) {
1316	>	long startTime = 0L;
1317	>	for (;;) {
1318	>	Thread.State s = thread.getState();
1319	>	if (s == Thread.State.BLOCKED ||
1320	>	s == Thread.State.WAITING ||
1321	>	s == Thread.State.TIMED_WAITING) {
1322	>	try {
1323	>	if (waitingForGodot.call())
1324	>	return;
1325	>	} catch (Throwable fail) { threadUnexpectedException(fail); }
1326	>	}
1327	>	else if (s == Thread.State.TERMINATED)
1328	>	fail("Unexpected thread termination");
1329	>	else if (startTime == 0L)
1330	>	startTime = System.nanoTime();
1331	>	else if (millisElapsedSince(startTime) > timeoutMillis) {
1332	>	threadAssertTrue(thread.isAlive());
1333	>	fail("timed out waiting for thread to enter wait state");
1334		}
1335	<	catch(InterruptedException success) {
1335	>	Thread.yield();
1336	>	}
1337	>	}
1338	>
1339	>	/**
1340	>	* Spin-waits up to LONG_DELAY_MS milliseconds for the given thread to
1341	>	* enter a wait state: BLOCKED, WAITING, or TIMED_WAITING.
1342	>	*/
1343	>	void waitForThreadToEnterWaitState(Thread thread) {
1344	>	waitForThreadToEnterWaitState(thread, LONG_DELAY_MS);
1345	>	}
1346	>
1347	>	/**
1348	>	* Spin-waits up to LONG_DELAY_MS milliseconds for the given thread to
1349	>	* enter a wait state: BLOCKED, WAITING, or TIMED_WAITING,
1350	>	* and additionally satisfy the given condition.
1351	>	*/
1352	>	void waitForThreadToEnterWaitState(
1353	>	Thread thread, Callable<Boolean> waitingForGodot) {
1354	>	waitForThreadToEnterWaitState(thread, LONG_DELAY_MS, waitingForGodot);
1355	>	}
1356	>
1357	>	/**
1358	>	* Returns the number of milliseconds since time given by
1359	>	* startNanoTime, which must have been previously returned from a
1360	>	* call to {@link System#nanoTime()}.
1361	>	*/
1362	>	static long millisElapsedSince(long startNanoTime) {
1363	>	return NANOSECONDS.toMillis(System.nanoTime() - startNanoTime);
1364	>	}
1365	>
1366	>	//     void assertTerminatesPromptly(long timeoutMillis, Runnable r) {
1367	>	//         long startTime = System.nanoTime();
1368	>	//         try {
1369	>	//             r.run();
1370	>	//         } catch (Throwable fail) { threadUnexpectedException(fail); }
1371	>	//         if (millisElapsedSince(startTime) > timeoutMillis/2)
1372	>	//             throw new AssertionFailedError("did not return promptly");
1373	>	//     }
1374	>
1375	>	//     void assertTerminatesPromptly(Runnable r) {
1376	>	//         assertTerminatesPromptly(LONG_DELAY_MS/2, r);
1377	>	//     }
1378	>
1379	>	/**
1380	>	* Checks that timed f.get() returns the expected value, and does not
1381	>	* wait for the timeout to elapse before returning.
1382	>	*/
1383	>	<T> void checkTimedGet(Future<T> f, T expectedValue, long timeoutMillis) {
1384	>	long startTime = System.nanoTime();
1385	>	try {
1386	>	assertEquals(expectedValue, f.get(timeoutMillis, MILLISECONDS));
1387	>	} catch (Throwable fail) { threadUnexpectedException(fail); }
1388	>	if (millisElapsedSince(startTime) > timeoutMillis/2)
1389	>	throw new AssertionFailedError("timed get did not return promptly");
1390	>	}
1391	>
1392	>	<T> void checkTimedGet(Future<T> f, T expectedValue) {
1393	>	checkTimedGet(f, expectedValue, LONG_DELAY_MS);
1394	>	}
1395	>
1396	>	/**
1397	>	* Returns a new started daemon Thread running the given runnable.
1398	>	*/
1399	>	Thread newStartedThread(Runnable runnable) {
1400	>	Thread t = new Thread(runnable);
1401	>	t.setDaemon(true);
1402	>	t.start();
1403	>	return t;
1404	>	}
1405	>
1406	>	/**
1407	>	* Waits for the specified time (in milliseconds) for the thread
1408	>	* to terminate (using {@link Thread#join(long)}), else interrupts
1409	>	* the thread (in the hope that it may terminate later) and fails.
1410	>	*/
1411	>	void awaitTermination(Thread t, long timeoutMillis) {
1412	>	try {
1413	>	t.join(timeoutMillis);
1414	>	} catch (InterruptedException fail) {
1415	>	threadUnexpectedException(fail);
1416	>	} finally {
1417	>	if (t.getState() != Thread.State.TERMINATED) {
1418	>	t.interrupt();
1419	>	threadFail("timed out waiting for thread to terminate");
1420		}
1421		}
1422		}
1423
1424	<	class SmallRunnable implements Runnable {
1425	<	public void run() {
1424	>	/**
1425	>	* Waits for LONG_DELAY_MS milliseconds for the thread to
1426	>	* terminate (using {@link Thread#join(long)}), else interrupts
1427	>	* the thread (in the hope that it may terminate later) and fails.
1428	>	*/
1429	>	void awaitTermination(Thread t) {
1430	>	awaitTermination(t, LONG_DELAY_MS);
1431	>	}
1432	>
1433	>	// Some convenient Runnable classes
1434	>
1435	>	public abstract class CheckedRunnable implements Runnable {
1436	>	protected abstract void realRun() throws Throwable;
1437	>
1438	>	public final void run() {
1439		try {
1440	<	Thread.sleep(SMALL_DELAY_MS);
1441	<	}
1442	<	catch(Exception e) {
362	<	threadUnexpectedException();
1440	>	realRun();
1441	>	} catch (Throwable fail) {
1442	>	threadUnexpectedException(fail);
1443		}
1444		}
1445		}
1446
1447	<	class SmallPossiblyInterruptedRunnable implements Runnable {
1448	<	public void run() {
1447	>	public abstract class RunnableShouldThrow implements Runnable {
1448	>	protected abstract void realRun() throws Throwable;
1449	>
1450	>	final Class<?> exceptionClass;
1451	>
1452	>	<T extends Throwable> RunnableShouldThrow(Class<T> exceptionClass) {
1453	>	this.exceptionClass = exceptionClass;
1454	>	}
1455	>
1456	>	public final void run() {
1457		try {
1458	<	Thread.sleep(SMALL_DELAY_MS);
1459	<	}
1460	<	catch(Exception e) {
1458	>	realRun();
1459	>	threadShouldThrow(exceptionClass.getSimpleName());
1460	>	} catch (Throwable t) {
1461	>	if (! exceptionClass.isInstance(t))
1462	>	threadUnexpectedException(t);
1463		}
1464		}
1465		}
1466
1467	<	class SmallCallable implements Callable {
1468	<	public Object call() {
1467	>	public abstract class ThreadShouldThrow extends Thread {
1468	>	protected abstract void realRun() throws Throwable;
1469	>
1470	>	final Class<?> exceptionClass;
1471	>
1472	>	<T extends Throwable> ThreadShouldThrow(Class<T> exceptionClass) {
1473	>	this.exceptionClass = exceptionClass;
1474	>	}
1475	>
1476	>	public final void run() {
1477		try {
1478	<	Thread.sleep(SMALL_DELAY_MS);
1478	>	realRun();
1479	>	threadShouldThrow(exceptionClass.getSimpleName());
1480	>	} catch (Throwable t) {
1481	>	if (! exceptionClass.isInstance(t))
1482	>	threadUnexpectedException(t);
1483		}
382	–	catch(Exception e) {
383	–	threadUnexpectedException();
384	–	}
385	–	return Boolean.TRUE;
1484		}
1485		}
1486
1487	<	class SmallInterruptedRunnable implements Runnable {
1488	<	public void run() {
1487	>	public abstract class CheckedInterruptedRunnable implements Runnable {
1488	>	protected abstract void realRun() throws Throwable;
1489	>
1490	>	public final void run() {
1491		try {
1492	<	Thread.sleep(SMALL_DELAY_MS);
1493	<	threadShouldThrow();
1494	<	}
1495	<	catch(InterruptedException success) {
1492	>	realRun();
1493	>	threadShouldThrow("InterruptedException");
1494	>	} catch (InterruptedException success) {
1495	>	threadAssertFalse(Thread.interrupted());
1496	>	} catch (Throwable fail) {
1497	>	threadUnexpectedException(fail);
1498		}
1499		}
1500		}
1501
1502	+	public abstract class CheckedCallable<T> implements Callable<T> {
1503	+	protected abstract T realCall() throws Throwable;
1504
1505	<	class MediumRunnable implements Runnable {
402	<	public void run() {
1505	>	public final T call() {
1506		try {
1507	<	Thread.sleep(MEDIUM_DELAY_MS);
1508	<	}
1509	<	catch(Exception e) {
1510	<	threadUnexpectedException();
1507	>	return realCall();
1508	>	} catch (Throwable fail) {
1509	>	threadUnexpectedException(fail);
1510	>	return null;
1511		}
1512		}
1513		}
1514
1515	<	class MediumInterruptedRunnable implements Runnable {
1516	<	public void run() {
1515	>	public abstract class CheckedInterruptedCallable<T>
1516	>	implements Callable<T> {
1517	>	protected abstract T realCall() throws Throwable;
1518	>
1519	>	public final T call() {
1520		try {
1521	<	Thread.sleep(MEDIUM_DELAY_MS);
1522	<	threadShouldThrow();
1523	<	}
1524	<	catch(InterruptedException success) {
1521	>	T result = realCall();
1522	>	threadShouldThrow("InterruptedException");
1523	>	return result;
1524	>	} catch (InterruptedException success) {
1525	>	threadAssertFalse(Thread.interrupted());
1526	>	} catch (Throwable fail) {
1527	>	threadUnexpectedException(fail);
1528		}
1529	+	return null;
1530		}
1531		}
1532
1533	<	class MediumPossiblyInterruptedRunnable implements Runnable {
1534	<	public void run() {
1533	>	public static class NoOpRunnable implements Runnable {
1534	>	public void run() {}
1535	>	}
1536	>
1537	>	public static class NoOpCallable implements Callable {
1538	>	public Object call() { return Boolean.TRUE; }
1539	>	}
1540	>
1541	>	public static final String TEST_STRING = "a test string";
1542	>
1543	>	public static class StringTask implements Callable<String> {
1544	>	final String value;
1545	>	public StringTask() { this(TEST_STRING); }
1546	>	public StringTask(String value) { this.value = value; }
1547	>	public String call() { return value; }
1548	>	}
1549	>
1550	>	public Callable<String> latchAwaitingStringTask(final CountDownLatch latch) {
1551	>	return new CheckedCallable<String>() {
1552	>	protected String realCall() {
1553	>	try {
1554	>	latch.await();
1555	>	} catch (InterruptedException quittingTime) {}
1556	>	return TEST_STRING;
1557	>	}};
1558	>	}
1559	>
1560	>	public Runnable countDowner(final CountDownLatch latch) {
1561	>	return new CheckedRunnable() {
1562	>	public void realRun() throws InterruptedException {
1563	>	latch.countDown();
1564	>	}};
1565	>	}
1566	>
1567	>	class LatchAwaiter extends CheckedRunnable {
1568	>	static final int NEW = 0;
1569	>	static final int RUNNING = 1;
1570	>	static final int DONE = 2;
1571	>	final CountDownLatch latch;
1572	>	int state = NEW;
1573	>	LatchAwaiter(CountDownLatch latch) { this.latch = latch; }
1574	>	public void realRun() throws InterruptedException {
1575	>	state = 1;
1576	>	await(latch);
1577	>	state = 2;
1578	>	}
1579	>	}
1580	>
1581	>	public LatchAwaiter awaiter(CountDownLatch latch) {
1582	>	return new LatchAwaiter(latch);
1583	>	}
1584	>
1585	>	public void await(CountDownLatch latch, long timeoutMillis) {
1586	>	try {
1587	>	if (!latch.await(timeoutMillis, MILLISECONDS))
1588	>	fail("timed out waiting for CountDownLatch for "
1589	>	+ (timeoutMillis/1000) + " sec");
1590	>	} catch (Throwable fail) {
1591	>	threadUnexpectedException(fail);
1592	>	}
1593	>	}
1594	>
1595	>	public void await(CountDownLatch latch) {
1596	>	await(latch, LONG_DELAY_MS);
1597	>	}
1598	>
1599	>	public void await(Semaphore semaphore) {
1600	>	try {
1601	>	if (!semaphore.tryAcquire(LONG_DELAY_MS, MILLISECONDS))
1602	>	fail("timed out waiting for Semaphore for "
1603	>	+ (LONG_DELAY_MS/1000) + " sec");
1604	>	} catch (Throwable fail) {
1605	>	threadUnexpectedException(fail);
1606	>	}
1607	>	}
1608	>
1609	>	//     /**
1610	>	//      * Spin-waits up to LONG_DELAY_MS until flag becomes true.
1611	>	//      */
1612	>	//     public void await(AtomicBoolean flag) {
1613	>	//         await(flag, LONG_DELAY_MS);
1614	>	//     }
1615	>
1616	>	//     /**
1617	>	//      * Spin-waits up to the specified timeout until flag becomes true.
1618	>	//      */
1619	>	//     public void await(AtomicBoolean flag, long timeoutMillis) {
1620	>	//         long startTime = System.nanoTime();
1621	>	//         while (!flag.get()) {
1622	>	//             if (millisElapsedSince(startTime) > timeoutMillis)
1623	>	//                 throw new AssertionFailedError("timed out");
1624	>	//             Thread.yield();
1625	>	//         }
1626	>	//     }
1627	>
1628	>	public static class NPETask implements Callable<String> {
1629	>	public String call() { throw new NullPointerException(); }
1630	>	}
1631	>
1632	>	public static class CallableOne implements Callable<Integer> {
1633	>	public Integer call() { return one; }
1634	>	}
1635	>
1636	>	public class ShortRunnable extends CheckedRunnable {
1637	>	protected void realRun() throws Throwable {
1638	>	delay(SHORT_DELAY_MS);
1639	>	}
1640	>	}
1641	>
1642	>	public class ShortInterruptedRunnable extends CheckedInterruptedRunnable {
1643	>	protected void realRun() throws InterruptedException {
1644	>	delay(SHORT_DELAY_MS);
1645	>	}
1646	>	}
1647	>
1648	>	public class SmallRunnable extends CheckedRunnable {
1649	>	protected void realRun() throws Throwable {
1650	>	delay(SMALL_DELAY_MS);
1651	>	}
1652	>	}
1653	>
1654	>	public class SmallPossiblyInterruptedRunnable extends CheckedRunnable {
1655	>	protected void realRun() {
1656		try {
1657	<	Thread.sleep(MEDIUM_DELAY_MS);
1658	<	}
1659	<	catch(InterruptedException success) {
1660	<	}
1657	>	delay(SMALL_DELAY_MS);
1658	>	} catch (InterruptedException ok) {}
1659	>	}
1660	>	}
1661	>
1662	>	public class SmallCallable extends CheckedCallable {
1663	>	protected Object realCall() throws InterruptedException {
1664	>	delay(SMALL_DELAY_MS);
1665	>	return Boolean.TRUE;
1666	>	}
1667	>	}
1668	>
1669	>	public class MediumRunnable extends CheckedRunnable {
1670	>	protected void realRun() throws Throwable {
1671	>	delay(MEDIUM_DELAY_MS);
1672	>	}
1673	>	}
1674	>
1675	>	public class MediumInterruptedRunnable extends CheckedInterruptedRunnable {
1676	>	protected void realRun() throws InterruptedException {
1677	>	delay(MEDIUM_DELAY_MS);
1678	>	}
1679	>	}
1680	>
1681	>	public Runnable possiblyInterruptedRunnable(final long timeoutMillis) {
1682	>	return new CheckedRunnable() {
1683	>	protected void realRun() {
1684	>	try {
1685	>	delay(timeoutMillis);
1686	>	} catch (InterruptedException ok) {}
1687	>	}};
1688	>	}
1689	>
1690	>	public class MediumPossiblyInterruptedRunnable extends CheckedRunnable {
1691	>	protected void realRun() {
1692	>	try {
1693	>	delay(MEDIUM_DELAY_MS);
1694	>	} catch (InterruptedException ok) {}
1695	>	}
1696	>	}
1697	>
1698	>	public class LongPossiblyInterruptedRunnable extends CheckedRunnable {
1699	>	protected void realRun() {
1700	>	try {
1701	>	delay(LONG_DELAY_MS);
1702	>	} catch (InterruptedException ok) {}
1703		}
1704		}
1705
1706		/**
1707		* For use as ThreadFactory in constructors
1708		*/
1709	<	static class SimpleThreadFactory implements ThreadFactory{
1710	<	public Thread newThread(Runnable r){
1709	>	public static class SimpleThreadFactory implements ThreadFactory {
1710	>	public Thread newThread(Runnable r) {
1711		return new Thread(r);
1712	<	}
1712	>	}
1713	>	}
1714	>
1715	>	public interface TrackedRunnable extends Runnable {
1716	>	boolean isDone();
1717	>	}
1718	>
1719	>	public static TrackedRunnable trackedRunnable(final long timeoutMillis) {
1720	>	return new TrackedRunnable() {
1721	>	private volatile boolean done = false;
1722	>	public boolean isDone() { return done; }
1723	>	public void run() {
1724	>	try {
1725	>	delay(timeoutMillis);
1726	>	done = true;
1727	>	} catch (InterruptedException ok) {}
1728	>	}
1729	>	};
1730		}
1731
1732	<	static class TrackedShortRunnable implements Runnable {
1733	<	volatile boolean done = false;
1732	>	public static class TrackedShortRunnable implements Runnable {
1733	>	public volatile boolean done = false;
1734		public void run() {
1735		try {
1736	<	Thread.sleep(SMALL_DELAY_MS);
1736	>	delay(SHORT_DELAY_MS);
1737		done = true;
1738	<	} catch(Exception e){
449	<	}
1738	>	} catch (InterruptedException ok) {}
1739		}
1740		}
1741
1742	<	static class TrackedMediumRunnable implements Runnable {
1743	<	volatile boolean done = false;
1742	>	public static class TrackedSmallRunnable implements Runnable {
1743	>	public volatile boolean done = false;
1744		public void run() {
1745		try {
1746	<	Thread.sleep(MEDIUM_DELAY_MS);
1746	>	delay(SMALL_DELAY_MS);
1747		done = true;
1748	<	} catch(Exception e){
460	<	}
1748	>	} catch (InterruptedException ok) {}
1749		}
1750		}
1751
1752	<	static class TrackedLongRunnable implements Runnable {
1753	<	volatile boolean done = false;
1752	>	public static class TrackedMediumRunnable implements Runnable {
1753	>	public volatile boolean done = false;
1754		public void run() {
1755		try {
1756	<	Thread.sleep(LONG_DELAY_MS);
1756	>	delay(MEDIUM_DELAY_MS);
1757		done = true;
1758	<	} catch(Exception e){
1759	<	}
1758	>	} catch (InterruptedException ok) {}
1759	>	}
1760	>	}
1761	>
1762	>	public static class TrackedLongRunnable implements Runnable {
1763	>	public volatile boolean done = false;
1764	>	public void run() {
1765	>	try {
1766	>	delay(LONG_DELAY_MS);
1767	>	done = true;
1768	>	} catch (InterruptedException ok) {}
1769		}
1770		}
1771
1772	<	static class TrackedNoOpRunnable implements Runnable {
1773	<	volatile boolean done = false;
1772	>	public static class TrackedNoOpRunnable implements Runnable {
1773	>	public volatile boolean done = false;
1774		public void run() {
1775		done = true;
1776		}
1777		}
1778
1779	<	static class TrackedCallable implements Callable {
1780	<	volatile boolean done = false;
1779	>	public static class TrackedCallable implements Callable {
1780	>	public volatile boolean done = false;
1781		public Object call() {
1782		try {
1783	<	Thread.sleep(SMALL_DELAY_MS);
1783	>	delay(SMALL_DELAY_MS);
1784		done = true;
1785	<	} catch(Exception e){
489	<	}
1785	>	} catch (InterruptedException ok) {}
1786		return Boolean.TRUE;
1787		}
1788		}
1789
1790		/**
1791	+	* Analog of CheckedRunnable for RecursiveAction
1792	+	*/
1793	+	public abstract class CheckedRecursiveAction extends RecursiveAction {
1794	+	protected abstract void realCompute() throws Throwable;
1795	+
1796	+	@Override protected final void compute() {
1797	+	try {
1798	+	realCompute();
1799	+	} catch (Throwable fail) {
1800	+	threadUnexpectedException(fail);
1801	+	}
1802	+	}
1803	+	}
1804	+
1805	+	/**
1806	+	* Analog of CheckedCallable for RecursiveTask
1807	+	*/
1808	+	public abstract class CheckedRecursiveTask<T> extends RecursiveTask<T> {
1809	+	protected abstract T realCompute() throws Throwable;
1810	+
1811	+	@Override protected final T compute() {
1812	+	try {
1813	+	return realCompute();
1814	+	} catch (Throwable fail) {
1815	+	threadUnexpectedException(fail);
1816	+	return null;
1817	+	}
1818	+	}
1819	+	}
1820	+
1821	+	/**
1822		* For use as RejectedExecutionHandler in constructors
1823		*/
1824	<	static class NoOpREHandler implements RejectedExecutionHandler{
1825	<	public void rejectedExecution(Runnable r, ThreadPoolExecutor executor){}
1824	>	public static class NoOpREHandler implements RejectedExecutionHandler {
1825	>	public void rejectedExecution(Runnable r,
1826	>	ThreadPoolExecutor executor) {}
1827	>	}
1828	>
1829	>	/**
1830	>	* A CyclicBarrier that uses timed await and fails with
1831	>	* AssertionFailedErrors instead of throwing checked exceptions.
1832	>	*/
1833	>	public static class CheckedBarrier extends CyclicBarrier {
1834	>	public CheckedBarrier(int parties) { super(parties); }
1835	>
1836	>	public int await() {
1837	>	try {
1838	>	return super.await(2 * LONG_DELAY_MS, MILLISECONDS);
1839	>	} catch (TimeoutException timedOut) {
1840	>	throw new AssertionFailedError("timed out");
1841	>	} catch (Exception fail) {
1842	>	AssertionFailedError afe =
1843	>	new AssertionFailedError("Unexpected exception: " + fail);
1844	>	afe.initCause(fail);
1845	>	throw afe;
1846	>	}
1847	>	}
1848	>	}
1849	>
1850	>	void checkEmpty(BlockingQueue q) {
1851	>	try {
1852	>	assertTrue(q.isEmpty());
1853	>	assertEquals(0, q.size());
1854	>	assertNull(q.peek());
1855	>	assertNull(q.poll());
1856	>	assertNull(q.poll(0, MILLISECONDS));
1857	>	assertEquals(q.toString(), "[]");
1858	>	assertTrue(Arrays.equals(q.toArray(), new Object[0]));
1859	>	assertFalse(q.iterator().hasNext());
1860	>	try {
1861	>	q.element();
1862	>	shouldThrow();
1863	>	} catch (NoSuchElementException success) {}
1864	>	try {
1865	>	q.iterator().next();
1866	>	shouldThrow();
1867	>	} catch (NoSuchElementException success) {}
1868	>	try {
1869	>	q.remove();
1870	>	shouldThrow();
1871	>	} catch (NoSuchElementException success) {}
1872	>	} catch (InterruptedException fail) { threadUnexpectedException(fail); }
1873	>	}
1874	>
1875	>	void assertSerialEquals(Object x, Object y) {
1876	>	assertTrue(Arrays.equals(serialBytes(x), serialBytes(y)));
1877	>	}
1878	>
1879	>	void assertNotSerialEquals(Object x, Object y) {
1880	>	assertFalse(Arrays.equals(serialBytes(x), serialBytes(y)));
1881	>	}
1882	>
1883	>	byte[] serialBytes(Object o) {
1884	>	try {
1885	>	ByteArrayOutputStream bos = new ByteArrayOutputStream();
1886	>	ObjectOutputStream oos = new ObjectOutputStream(bos);
1887	>	oos.writeObject(o);
1888	>	oos.flush();
1889	>	oos.close();
1890	>	return bos.toByteArray();
1891	>	} catch (Throwable fail) {
1892	>	threadUnexpectedException(fail);
1893	>	return new byte[0];
1894	>	}
1895	>	}
1896	>
1897	>	void assertImmutable(final Object o) {
1898	>	if (o instanceof Collection) {
1899	>	assertThrows(
1900	>	UnsupportedOperationException.class,
1901	>	new Runnable() { public void run() {
1902	>	((Collection) o).add(null);}});
1903	>	}
1904	>	}
1905	>
1906	>	@SuppressWarnings("unchecked")
1907	>	<T> T serialClone(T o) {
1908	>	try {
1909	>	ObjectInputStream ois = new ObjectInputStream
1910	>	(new ByteArrayInputStream(serialBytes(o)));
1911	>	T clone = (T) ois.readObject();
1912	>	if (o == clone) assertImmutable(o);
1913	>	assertSame(o.getClass(), clone.getClass());
1914	>	return clone;
1915	>	} catch (Throwable fail) {
1916	>	threadUnexpectedException(fail);
1917	>	return null;
1918	>	}
1919	>	}
1920	>
1921	>	/**
1922	>	* A version of serialClone that leaves error handling (for
1923	>	* e.g. NotSerializableException) up to the caller.
1924	>	*/
1925	>	@SuppressWarnings("unchecked")
1926	>	<T> T serialClonePossiblyFailing(T o)
1927	>	throws ReflectiveOperationException, java.io.IOException {
1928	>	ByteArrayOutputStream bos = new ByteArrayOutputStream();
1929	>	ObjectOutputStream oos = new ObjectOutputStream(bos);
1930	>	oos.writeObject(o);
1931	>	oos.flush();
1932	>	oos.close();
1933	>	ObjectInputStream ois = new ObjectInputStream
1934	>	(new ByteArrayInputStream(bos.toByteArray()));
1935	>	T clone = (T) ois.readObject();
1936	>	if (o == clone) assertImmutable(o);
1937	>	assertSame(o.getClass(), clone.getClass());
1938	>	return clone;
1939	>	}
1940	>
1941	>	/**
1942	>	* If o implements Cloneable and has a public clone method,
1943	>	* returns a clone of o, else null.
1944	>	*/
1945	>	@SuppressWarnings("unchecked")
1946	>	<T> T cloneableClone(T o) {
1947	>	if (!(o instanceof Cloneable)) return null;
1948	>	final T clone;
1949	>	try {
1950	>	clone = (T) o.getClass().getMethod("clone").invoke(o);
1951	>	} catch (NoSuchMethodException ok) {
1952	>	return null;
1953	>	} catch (ReflectiveOperationException unexpected) {
1954	>	throw new Error(unexpected);
1955	>	}
1956	>	assertNotSame(o, clone); // not 100% guaranteed by spec
1957	>	assertSame(o.getClass(), clone.getClass());
1958	>	return clone;
1959	>	}
1960	>
1961	>	public void assertThrows(Class<? extends Throwable> expectedExceptionClass,
1962	>	Runnable... throwingActions) {
1963	>	for (Runnable throwingAction : throwingActions) {
1964	>	boolean threw = false;
1965	>	try { throwingAction.run(); }
1966	>	catch (Throwable t) {
1967	>	threw = true;
1968	>	if (!expectedExceptionClass.isInstance(t)) {
1969	>	AssertionFailedError afe =
1970	>	new AssertionFailedError
1971	>	("Expected " + expectedExceptionClass.getName() +
1972	>	", got " + t.getClass().getName());
1973	>	afe.initCause(t);
1974	>	threadUnexpectedException(afe);
1975	>	}
1976	>	}
1977	>	if (!threw)
1978	>	shouldThrow(expectedExceptionClass.getName());
1979	>	}
1980	>	}
1981	>
1982	>	public void assertIteratorExhausted(Iterator<?> it) {
1983	>	try {
1984	>	it.next();
1985	>	shouldThrow();
1986	>	} catch (NoSuchElementException success) {}
1987	>	assertFalse(it.hasNext());
1988	>	}
1989	>
1990	>	public <T> Callable<T> callableThrowing(final Exception ex) {
1991	>	return new Callable<T>() { public T call() throws Exception { throw ex; }};
1992	>	}
1993	>
1994	>	public Runnable runnableThrowing(final RuntimeException ex) {
1995	>	return new Runnable() { public void run() { throw ex; }};
1996	>	}
1997	>
1998	>	/** A reusable thread pool to be shared by tests. */
1999	>	static final ExecutorService cachedThreadPool =
2000	>	new ThreadPoolExecutor(0, Integer.MAX_VALUE,
2001	>	1000L, MILLISECONDS,
2002	>	new SynchronousQueue<Runnable>());
2003	>
2004	>	static <T> void shuffle(T[] array) {
2005	>	Collections.shuffle(Arrays.asList(array), ThreadLocalRandom.current());
2006		}
500	–
501	–
2007		}

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