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

Comparing jsr166/src/test/tck/JSR166TestCase.java (file contents):
Revision 1.25 by dl, Tue Mar 1 01:32:00 2005 UTC vs.
Revision 1.253 by jsr166, Fri Feb 22 19:27:47 2019 UTC

#	Line 1 | Line 1
1		/*
2	<	* Written by Doug Lea with assistance from members of JCP JSR-166
3	<	* Expert Group and released to the public domain, as explained at
4	<	* http://creativecommons.org/licenses/publicdomain
5	<	* Other contributors include Andrew Wright, Jeffrey Hayes,
6	<	* Pat Fisher, Mike Judd.
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.*;
14	<	import java.security.*;
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.Deque;
70	>	import java.util.Enumeration;
71	>	import java.util.HashSet;
72	>	import java.util.Iterator;
73	>	import java.util.List;
74	>	import java.util.NoSuchElementException;
75	>	import java.util.PropertyPermission;
76	>	import java.util.Set;
77	>	import java.util.concurrent.BlockingQueue;
78	>	import java.util.concurrent.Callable;
79	>	import java.util.concurrent.CountDownLatch;
80	>	import java.util.concurrent.CyclicBarrier;
81	>	import java.util.concurrent.ExecutionException;
82	>	import java.util.concurrent.Executor;
83	>	import java.util.concurrent.Executors;
84	>	import java.util.concurrent.ExecutorService;
85	>	import java.util.concurrent.ForkJoinPool;
86	>	import java.util.concurrent.Future;
87	>	import java.util.concurrent.FutureTask;
88	>	import java.util.concurrent.RecursiveAction;
89	>	import java.util.concurrent.RecursiveTask;
90	>	import java.util.concurrent.RejectedExecutionException;
91	>	import java.util.concurrent.RejectedExecutionHandler;
92	>	import java.util.concurrent.Semaphore;
93	>	import java.util.concurrent.ScheduledExecutorService;
94	>	import java.util.concurrent.ScheduledFuture;
95	>	import java.util.concurrent.SynchronousQueue;
96	>	import java.util.concurrent.ThreadFactory;
97	>	import java.util.concurrent.ThreadLocalRandom;
98	>	import java.util.concurrent.ThreadPoolExecutor;
99	>	import java.util.concurrent.TimeUnit;
100	>	import java.util.concurrent.TimeoutException;
101	>	import java.util.concurrent.atomic.AtomicBoolean;
102	>	import java.util.concurrent.atomic.AtomicReference;
103	>	import java.util.regex.Pattern;
104	>
105	>	import junit.framework.Test;
106	>	import junit.framework.TestCase;
107	>	import junit.framework.TestResult;
108	>	import junit.framework.TestSuite;
109
110		/**
111		* Base class for JSR166 Junit TCK tests.  Defines some constants,
112		* utility methods and classes, as well as a simple framework for
113		* helping to make sure that assertions failing in generated threads
114		* cause the associated test that generated them to itself fail (which
115	<	* JUnit doe not otherwise arrange).  The rules for creating such
115	>	* JUnit does not otherwise arrange).  The rules for creating such
116		* tests are:
117		*
118		* <ol>
119		*
120	<	* <li> All assertions in code running in generated threads must use
121	<	* the forms {@link #threadFail} , {@link #threadAssertTrue} {@link
122	<	* #threadAssertEquals}, or {@link #threadAssertNull}, (not
123	<	* <tt>fail</tt>, <tt>assertTrue</tt>, etc.) It is OK (but not
124	<	* particularly recommended) for other code to use these forms too.
125	<	* Only the most typically used JUnit assertion methods are defined
126	<	* this way, but enough to live with.</li>
120	>	* <li>All code not running in the main test thread (manually spawned threads
121	>	* or the common fork join pool) must be checked for failure (and completion!).
122	>	* Mechanisms that can be used to ensure this are:
123	>	*   <ol>
124	>	*   <li>Signalling via a synchronizer like AtomicInteger or CountDownLatch
125	>	*    that the task completed normally, which is checked before returning from
126	>	*    the test method in the main thread.
127	>	*   <li>Using the forms {@link #threadFail}, {@link #threadAssertTrue},
128	>	*    or {@link #threadAssertNull}, (not {@code fail}, {@code assertTrue}, etc.)
129	>	*    Only the most typically used JUnit assertion methods are defined
130	>	*    this way, but enough to live with.
131	>	*   <li>Recording failure explicitly using {@link #threadUnexpectedException}
132	>	*    or {@link #threadRecordFailure}.
133	>	*   <li>Using a wrapper like CheckedRunnable that uses one the mechanisms above.
134	>	*   </ol>
135		*
136	<	* <li> If you override {@link #setUp} or {@link #tearDown}, make sure
137	<	* to invoke <tt>super.setUp</tt> and <tt>super.tearDown</tt> within
136	>	* <li>If you override {@link #setUp} or {@link #tearDown}, make sure
137	>	* to invoke {@code super.setUp} and {@code super.tearDown} within
138		* them. These methods are used to clear and check for thread
139	<	* assertion failures.</li>
139	>	* assertion failures.
140		*
141	<	* <li>All delays and timeouts must use one of the constants <tt>
142	<	* SHORT_DELAY_MS</tt>, <tt> SMALL_DELAY_MS</tt>, <tt> MEDIUM_DELAY_MS</tt>,
143	<	* <tt> LONG_DELAY_MS</tt>. The idea here is that a SHORT is always
141	>	* <li>All delays and timeouts must use one of the constants {@code
142	>	* SHORT_DELAY_MS}, {@code SMALL_DELAY_MS}, {@code MEDIUM_DELAY_MS},
143	>	* {@code LONG_DELAY_MS}. The idea here is that a SHORT is always
144		* discriminable from zero time, and always allows enough time for the
145		* small amounts of computation (creating a thread, calling a few
146		* methods, etc) needed to reach a timeout point. Similarly, a SMALL
147		* is always discriminable as larger than SHORT and smaller than
148		* MEDIUM.  And so on. These constants are set to conservative values,
149		* but even so, if there is ever any doubt, they can all be increased
150	<	* in one spot to rerun tests on slower platforms</li>
150	>	* in one spot to rerun tests on slower platforms.
151		*
152	<	* <li> All threads generated must be joined inside each test case
153	<	* method (or <tt>fail</tt> to do so) before returning from the
154	<	* method. The <tt> joinPool</tt> method can be used to do this when
155	<	* using Executors.</li>
152	>	* <li>All threads generated must be joined inside each test case
153	>	* method (or {@code fail} to do so) before returning from the
154	>	* method. The {@code joinPool} method can be used to do this when
155	>	* using Executors.
156		*
157		* </ol>
158		*
159	<	* <p> <b>Other notes</b>
159	>	* <p><b>Other notes</b>
160		* <ul>
161		*
162	<	* <li> Usually, there is one testcase method per JSR166 method
162	>	* <li>Usually, there is one testcase method per JSR166 method
163		* covering "normal" operation, and then as many exception-testing
164		* methods as there are exceptions the method can throw. Sometimes
165		* there are multiple tests per JSR166 method when the different
166		* "normal" behaviors differ significantly. And sometimes testcases
167	<	* cover multiple methods when they cannot be tested in
168	<	* isolation.</li>
169	<	*
67	<	* <li> The documentation style for testcases is to provide as javadoc
167	>	* cover multiple methods when they cannot be tested in isolation.
168	>	*
169	>	* <li>The documentation style for testcases is to provide as javadoc
170		* a simple sentence or two describing the property that the testcase
171		* method purports to test. The javadocs do not say anything about how
172	<	* the property is tested. To find out, read the code.</li>
172	>	* the property is tested. To find out, read the code.
173		*
174	<	* <li> These tests are "conformance tests", and do not attempt to
174	>	* <li>These tests are "conformance tests", and do not attempt to
175		* test throughput, latency, scalability or other performance factors
176		* (see the separate "jtreg" tests for a set intended to check these
177		* for the most central aspects of functionality.) So, most tests use
178		* the smallest sensible numbers of threads, collection sizes, etc
179	<	* needed to check basic conformance.</li>
179	>	* needed to check basic conformance.
180		*
181		* <li>The test classes currently do not declare inclusion in
182		* any particular package to simplify things for people integrating
183	<	* them in TCK test suites.</li>
183	>	* them in TCK test suites.
184		*
185	<	* <li> As a convenience, the <tt>main</tt> of this class (JSR166TestCase)
186	<	* runs all JSR166 unit tests.</li>
185	>	* <li>As a convenience, the {@code main} of this class (JSR166TestCase)
186	>	* runs all JSR166 unit tests.
187		*
188		* </ul>
189		*/
190		public class JSR166TestCase extends TestCase {
191	+	private static final boolean useSecurityManager =
192	+	Boolean.getBoolean("jsr166.useSecurityManager");
193	+
194	+	protected static final boolean expensiveTests =
195	+	Boolean.getBoolean("jsr166.expensiveTests");
196	+
197	+	/**
198	+	* If true, also run tests that are not part of the official tck
199	+	* because they test unspecified implementation details.
200	+	*/
201	+	protected static final boolean testImplementationDetails =
202	+	Boolean.getBoolean("jsr166.testImplementationDetails");
203	+
204	+	/**
205	+	* If true, report on stdout all "slow" tests, that is, ones that
206	+	* take more than profileThreshold milliseconds to execute.
207	+	*/
208	+	private static final boolean profileTests =
209	+	Boolean.getBoolean("jsr166.profileTests");
210	+
211	+	/**
212	+	* The number of milliseconds that tests are permitted for
213	+	* execution without being reported, when profileTests is set.
214	+	*/
215	+	private static final long profileThreshold =
216	+	Long.getLong("jsr166.profileThreshold", 100);
217	+
218	+	/**
219	+	* The number of repetitions per test (for tickling rare bugs).
220	+	*/
221	+	private static final int runsPerTest =
222	+	Integer.getInteger("jsr166.runsPerTest", 1);
223	+
224	+	/**
225	+	* The number of repetitions of the test suite (for finding leaks?).
226	+	*/
227	+	private static final int suiteRuns =
228	+	Integer.getInteger("jsr166.suiteRuns", 1);
229	+
230	+	/**
231	+	* Returns the value of the system property, or NaN if not defined.
232	+	*/
233	+	private static float systemPropertyValue(String name) {
234	+	String floatString = System.getProperty(name);
235	+	if (floatString == null)
236	+	return Float.NaN;
237	+	try {
238	+	return Float.parseFloat(floatString);
239	+	} catch (NumberFormatException ex) {
240	+	throw new IllegalArgumentException(
241	+	String.format("Bad float value in system property %s=%s",
242	+	name, floatString));
243	+	}
244	+	}
245	+
246		/**
247	<	* Runs all JSR166 unit tests using junit.textui.TestRunner
248	<	*/
249	<	public static void main (String[] args) {
250	<	int iters = 1;
251	<	if (args.length > 0)
252	<	iters = Integer.parseInt(args[0]);
253	<	Test s = suite();
254	<	for (int i = 0; i < iters; ++i) {
255	<	junit.textui.TestRunner.run (s);
247	>	* The scaling factor to apply to standard delays used in tests.
248	>	* May be initialized from any of:
249	>	* - the "jsr166.delay.factor" system property
250	>	* - the "test.timeout.factor" system property (as used by jtreg)
251	>	*   See: http://openjdk.java.net/jtreg/tag-spec.html
252	>	* - hard-coded fuzz factor when using a known slowpoke VM
253	>	*/
254	>	private static final float delayFactor = delayFactor();
255	>
256	>	private static float delayFactor() {
257	>	float x;
258	>	if (!Float.isNaN(x = systemPropertyValue("jsr166.delay.factor")))
259	>	return x;
260	>	if (!Float.isNaN(x = systemPropertyValue("test.timeout.factor")))
261	>	return x;
262	>	String prop = System.getProperty("java.vm.version");
263	>	if (prop != null && prop.matches(".*debug.*"))
264	>	return 4.0f; // How much slower is fastdebug than product?!
265	>	return 1.0f;
266	>	}
267	>
268	>	public JSR166TestCase() { super(); }
269	>	public JSR166TestCase(String name) { super(name); }
270	>
271	>	/**
272	>	* A filter for tests to run, matching strings of the form
273	>	* methodName(className), e.g. "testInvokeAll5(ForkJoinPoolTest)"
274	>	* Usefully combined with jsr166.runsPerTest.
275	>	*/
276	>	private static final Pattern methodFilter = methodFilter();
277	>
278	>	private static Pattern methodFilter() {
279	>	String regex = System.getProperty("jsr166.methodFilter");
280	>	return (regex == null) ? null : Pattern.compile(regex);
281	>	}
282	>
283	>	// Instrumentation to debug very rare, but very annoying hung test runs.
284	>	static volatile TestCase currentTestCase;
285	>	// static volatile int currentRun = 0;
286	>	static {
287	>	Runnable checkForWedgedTest = new Runnable() { public void run() {
288	>	// Avoid spurious reports with enormous runsPerTest.
289	>	// A single test case run should never take more than 1 second.
290	>	// But let's cap it at the high end too ...
291	>	final int timeoutMinutes =
292	>	Math.min(15, Math.max(runsPerTest / 60, 1));
293	>	for (TestCase lastTestCase = currentTestCase;;) {
294	>	try { MINUTES.sleep(timeoutMinutes); }
295	>	catch (InterruptedException unexpected) { break; }
296	>	if (lastTestCase == currentTestCase) {
297	>	System.err.printf(
298	>	"Looks like we're stuck running test: %s%n",
299	>	lastTestCase);
300	>	//                     System.err.printf(
301	>	//                         "Looks like we're stuck running test: %s (%d/%d)%n",
302	>	//                         lastTestCase, currentRun, runsPerTest);
303	>	//                     System.err.println("availableProcessors=" +
304	>	//                         Runtime.getRuntime().availableProcessors());
305	>	//                     System.err.printf("cpu model = %s%n", cpuModel());
306	>	dumpTestThreads();
307	>	// one stack dump is probably enough; more would be spam
308	>	break;
309	>	}
310	>	lastTestCase = currentTestCase;
311	>	}}};
312	>	Thread thread = new Thread(checkForWedgedTest, "checkForWedgedTest");
313	>	thread.setDaemon(true);
314	>	thread.start();
315	>	}
316	>
317	>	//     public static String cpuModel() {
318	>	//         try {
319	>	//             java.util.regex.Matcher matcher
320	>	//               = Pattern.compile("model name\\s*: (.*)")
321	>	//                 .matcher(new String(
322	>	//                     java.nio.file.Files.readAllBytes(
323	>	//                         java.nio.file.Paths.get("/proc/cpuinfo")), "UTF-8"));
324	>	//             matcher.find();
325	>	//             return matcher.group(1);
326	>	//         } catch (Exception ex) { return null; }
327	>	//     }
328	>
329	>	public void runBare() throws Throwable {
330	>	currentTestCase = this;
331	>	if (methodFilter == null
332	>	|| methodFilter.matcher(toString()).find())
333	>	super.runBare();
334	>	}
335	>
336	>	protected void runTest() throws Throwable {
337	>	for (int i = 0; i < runsPerTest; i++) {
338	>	// currentRun = i;
339	>	if (profileTests)
340	>	runTestProfiled();
341	>	else
342	>	super.runTest();
343	>	}
344	>	}
345	>
346	>	protected void runTestProfiled() throws Throwable {
347	>	for (int i = 0; i < 2; i++) {
348	>	long startTime = System.nanoTime();
349	>	super.runTest();
350	>	long elapsedMillis = millisElapsedSince(startTime);
351	>	if (elapsedMillis < profileThreshold)
352	>	break;
353	>	// Never report first run of any test; treat it as a
354	>	// warmup run, notably to trigger all needed classloading,
355	>	if (i > 0)
356	>	System.out.printf("%n%s: %d%n", toString(), elapsedMillis);
357	>	}
358	>	}
359	>
360	>	/**
361	>	* Runs all JSR166 unit tests using junit.textui.TestRunner.
362	>	*/
363	>	public static void main(String[] args) {
364	>	main(suite(), args);
365	>	}
366	>
367	>	static class PithyResultPrinter extends junit.textui.ResultPrinter {
368	>	PithyResultPrinter(java.io.PrintStream writer) { super(writer); }
369	>	long runTime;
370	>	public void startTest(Test test) {}
371	>	protected void printHeader(long runTime) {
372	>	this.runTime = runTime; // defer printing for later
373	>	}
374	>	protected void printFooter(TestResult result) {
375	>	if (result.wasSuccessful()) {
376	>	getWriter().println("OK (" + result.runCount() + " tests)"
377	>	+ "  Time: " + elapsedTimeAsString(runTime));
378	>	} else {
379	>	getWriter().println("Time: " + elapsedTimeAsString(runTime));
380	>	super.printFooter(result);
381	>	}
382	>	}
383	>	}
384	>
385	>	/**
386	>	* Returns a TestRunner that doesn't bother with unnecessary
387	>	* fluff, like printing a "." for each test case.
388	>	*/
389	>	static junit.textui.TestRunner newPithyTestRunner() {
390	>	junit.textui.TestRunner runner = new junit.textui.TestRunner();
391	>	runner.setPrinter(new PithyResultPrinter(System.out));
392	>	return runner;
393	>	}
394	>
395	>	/**
396	>	* Runs all unit tests in the given test suite.
397	>	* Actual behavior influenced by jsr166.* system properties.
398	>	*/
399	>	static void main(Test suite, String[] args) {
400	>	if (useSecurityManager) {
401	>	System.err.println("Setting a permissive security manager");
402	>	Policy.setPolicy(permissivePolicy());
403	>	System.setSecurityManager(new SecurityManager());
404	>	}
405	>	for (int i = 0; i < suiteRuns; i++) {
406	>	TestResult result = newPithyTestRunner().doRun(suite);
407	>	if (!result.wasSuccessful())
408	>	System.exit(1);
409		System.gc();
410		System.runFinalization();
411		}
102	–	System.exit(0);
412		}
413
414	+	public static TestSuite newTestSuite(Object... suiteOrClasses) {
415	+	TestSuite suite = new TestSuite();
416	+	for (Object suiteOrClass : suiteOrClasses) {
417	+	if (suiteOrClass instanceof TestSuite)
418	+	suite.addTest((TestSuite) suiteOrClass);
419	+	else if (suiteOrClass instanceof Class)
420	+	suite.addTest(new TestSuite((Class<?>) suiteOrClass));
421	+	else
422	+	throw new ClassCastException("not a test suite or class");
423	+	}
424	+	return suite;
425	+	}
426	+
427	+	public static void addNamedTestClasses(TestSuite suite,
428	+	String... testClassNames) {
429	+	for (String testClassName : testClassNames) {
430	+	try {
431	+	Class<?> testClass = Class.forName(testClassName);
432	+	Method m = testClass.getDeclaredMethod("suite");
433	+	suite.addTest(newTestSuite((Test)m.invoke(null)));
434	+	} catch (ReflectiveOperationException e) {
435	+	throw new AssertionError("Missing test class", e);
436	+	}
437	+	}
438	+	}
439	+
440	+	public static final double JAVA_CLASS_VERSION;
441	+	public static final String JAVA_SPECIFICATION_VERSION;
442	+	static {
443	+	try {
444	+	JAVA_CLASS_VERSION = java.security.AccessController.doPrivileged(
445	+	new java.security.PrivilegedAction<Double>() {
446	+	public Double run() {
447	+	return Double.valueOf(System.getProperty("java.class.version"));}});
448	+	JAVA_SPECIFICATION_VERSION = java.security.AccessController.doPrivileged(
449	+	new java.security.PrivilegedAction<String>() {
450	+	public String run() {
451	+	return System.getProperty("java.specification.version");}});
452	+	} catch (Throwable t) {
453	+	throw new Error(t);
454	+	}
455	+	}
456	+
457	+	public static boolean atLeastJava6()  { return JAVA_CLASS_VERSION >= 50.0; }
458	+	public static boolean atLeastJava7()  { return JAVA_CLASS_VERSION >= 51.0; }
459	+	public static boolean atLeastJava8()  { return JAVA_CLASS_VERSION >= 52.0; }
460	+	public static boolean atLeastJava9()  { return JAVA_CLASS_VERSION >= 53.0; }
461	+	public static boolean atLeastJava10() { return JAVA_CLASS_VERSION >= 54.0; }
462	+	public static boolean atLeastJava11() { return JAVA_CLASS_VERSION >= 55.0; }
463	+	public static boolean atLeastJava12() { return JAVA_CLASS_VERSION >= 56.0; }
464	+	public static boolean atLeastJava13() { return JAVA_CLASS_VERSION >= 57.0; }
465	+	public static boolean atLeastJava14() { return JAVA_CLASS_VERSION >= 58.0; }
466	+	public static boolean atLeastJava15() { return JAVA_CLASS_VERSION >= 59.0; }
467	+	public static boolean atLeastJava16() { return JAVA_CLASS_VERSION >= 60.0; }
468	+	public static boolean atLeastJava17() { return JAVA_CLASS_VERSION >= 61.0; }
469	+
470		/**
471	<	* Collects all JSR166 unit tests as one suite
472	<	*/
473	<	public static Test suite ( ) {
474	<	TestSuite suite = new TestSuite("JSR166 Unit Tests");
475	<
476	<	suite.addTest(new TestSuite(AbstractExecutorServiceTest.class));
477	<	suite.addTest(new TestSuite(AbstractQueueTest.class));
478	<	suite.addTest(new TestSuite(AbstractQueuedSynchronizerTest.class));
479	<	suite.addTest(new TestSuite(AbstractQueuedLongSynchronizerTest.class));
480	<	suite.addTest(new TestSuite(ArrayBlockingQueueTest.class));
481	<	suite.addTest(new TestSuite(ArrayDequeTest.class));
482	<	suite.addTest(new TestSuite(AtomicBooleanTest.class));
483	<	suite.addTest(new TestSuite(AtomicIntegerArrayTest.class));
484	<	suite.addTest(new TestSuite(AtomicIntegerFieldUpdaterTest.class));
485	<	suite.addTest(new TestSuite(AtomicIntegerTest.class));
486	<	suite.addTest(new TestSuite(AtomicLongArrayTest.class));
487	<	suite.addTest(new TestSuite(AtomicLongFieldUpdaterTest.class));
488	<	suite.addTest(new TestSuite(AtomicLongTest.class));
489	<	suite.addTest(new TestSuite(AtomicMarkableReferenceTest.class));
490	<	suite.addTest(new TestSuite(AtomicReferenceArrayTest.class));
491	<	suite.addTest(new TestSuite(AtomicReferenceFieldUpdaterTest.class));
492	<	suite.addTest(new TestSuite(AtomicReferenceTest.class));
493	<	suite.addTest(new TestSuite(AtomicStampedReferenceTest.class));
494	<	suite.addTest(new TestSuite(ConcurrentHashMapTest.class));
495	<	suite.addTest(new TestSuite(ConcurrentLinkedQueueTest.class));
496	<	suite.addTest(new TestSuite(ConcurrentSkipListMapTest.class));
497	<	suite.addTest(new TestSuite(ConcurrentSkipListSubMapTest.class));
498	<	suite.addTest(new TestSuite(ConcurrentSkipListSetTest.class));
499	<	suite.addTest(new TestSuite(ConcurrentSkipListSubSetTest.class));
500	<	suite.addTest(new TestSuite(CopyOnWriteArrayListTest.class));
501	<	suite.addTest(new TestSuite(CopyOnWriteArraySetTest.class));
502	<	suite.addTest(new TestSuite(CountDownLatchTest.class));
503	<	suite.addTest(new TestSuite(CyclicBarrierTest.class));
504	<	suite.addTest(new TestSuite(DelayQueueTest.class));
505	<	suite.addTest(new TestSuite(ExchangerTest.class));
506	<	suite.addTest(new TestSuite(ExecutorsTest.class));
507	<	suite.addTest(new TestSuite(ExecutorCompletionServiceTest.class));
508	<	suite.addTest(new TestSuite(FutureTaskTest.class));
509	<	suite.addTest(new TestSuite(LinkedBlockingDequeTest.class));
510	<	suite.addTest(new TestSuite(LinkedBlockingQueueTest.class));
511	<	suite.addTest(new TestSuite(LinkedListTest.class));
512	<	suite.addTest(new TestSuite(LockSupportTest.class));
513	<	suite.addTest(new TestSuite(PriorityBlockingQueueTest.class));
514	<	suite.addTest(new TestSuite(PriorityQueueTest.class));
515	<	suite.addTest(new TestSuite(ReentrantLockTest.class));
516	<	suite.addTest(new TestSuite(ReentrantReadWriteLockTest.class));
517	<	suite.addTest(new TestSuite(ScheduledExecutorTest.class));
518	<	suite.addTest(new TestSuite(SemaphoreTest.class));
519	<	suite.addTest(new TestSuite(SynchronousQueueTest.class));
520	<	suite.addTest(new TestSuite(SystemTest.class));
521	<	suite.addTest(new TestSuite(ThreadLocalTest.class));
522	<	suite.addTest(new TestSuite(ThreadPoolExecutorTest.class));
523	<	suite.addTest(new TestSuite(ThreadTest.class));
524	<	suite.addTest(new TestSuite(TimeUnitTest.class));
525	<	suite.addTest(new TestSuite(TreeMapTest.class));
526	<	suite.addTest(new TestSuite(TreeSetTest.class));
527	<
471	>	* Collects all JSR166 unit tests as one suite.
472	>	*/
473	>	public static Test suite() {
474	>	// Java7+ test classes
475	>	TestSuite suite = newTestSuite(
476	>	ForkJoinPoolTest.suite(),
477	>	ForkJoinTaskTest.suite(),
478	>	RecursiveActionTest.suite(),
479	>	RecursiveTaskTest.suite(),
480	>	LinkedTransferQueueTest.suite(),
481	>	PhaserTest.suite(),
482	>	ThreadLocalRandomTest.suite(),
483	>	AbstractExecutorServiceTest.suite(),
484	>	AbstractQueueTest.suite(),
485	>	AbstractQueuedSynchronizerTest.suite(),
486	>	AbstractQueuedLongSynchronizerTest.suite(),
487	>	ArrayBlockingQueueTest.suite(),
488	>	ArrayDequeTest.suite(),
489	>	ArrayListTest.suite(),
490	>	AtomicBooleanTest.suite(),
491	>	AtomicIntegerArrayTest.suite(),
492	>	AtomicIntegerFieldUpdaterTest.suite(),
493	>	AtomicIntegerTest.suite(),
494	>	AtomicLongArrayTest.suite(),
495	>	AtomicLongFieldUpdaterTest.suite(),
496	>	AtomicLongTest.suite(),
497	>	AtomicMarkableReferenceTest.suite(),
498	>	AtomicReferenceArrayTest.suite(),
499	>	AtomicReferenceFieldUpdaterTest.suite(),
500	>	AtomicReferenceTest.suite(),
501	>	AtomicStampedReferenceTest.suite(),
502	>	ConcurrentHashMapTest.suite(),
503	>	ConcurrentLinkedDequeTest.suite(),
504	>	ConcurrentLinkedQueueTest.suite(),
505	>	ConcurrentSkipListMapTest.suite(),
506	>	ConcurrentSkipListSubMapTest.suite(),
507	>	ConcurrentSkipListSetTest.suite(),
508	>	ConcurrentSkipListSubSetTest.suite(),
509	>	CopyOnWriteArrayListTest.suite(),
510	>	CopyOnWriteArraySetTest.suite(),
511	>	CountDownLatchTest.suite(),
512	>	CountedCompleterTest.suite(),
513	>	CyclicBarrierTest.suite(),
514	>	DelayQueueTest.suite(),
515	>	EntryTest.suite(),
516	>	ExchangerTest.suite(),
517	>	ExecutorsTest.suite(),
518	>	ExecutorCompletionServiceTest.suite(),
519	>	FutureTaskTest.suite(),
520	>	LinkedBlockingDequeTest.suite(),
521	>	LinkedBlockingQueueTest.suite(),
522	>	LinkedListTest.suite(),
523	>	LockSupportTest.suite(),
524	>	PriorityBlockingQueueTest.suite(),
525	>	PriorityQueueTest.suite(),
526	>	ReentrantLockTest.suite(),
527	>	ReentrantReadWriteLockTest.suite(),
528	>	ScheduledExecutorTest.suite(),
529	>	ScheduledExecutorSubclassTest.suite(),
530	>	SemaphoreTest.suite(),
531	>	SynchronousQueueTest.suite(),
532	>	SystemTest.suite(),
533	>	ThreadLocalTest.suite(),
534	>	ThreadPoolExecutorTest.suite(),
535	>	ThreadPoolExecutorSubclassTest.suite(),
536	>	ThreadTest.suite(),
537	>	TimeUnitTest.suite(),
538	>	TreeMapTest.suite(),
539	>	TreeSetTest.suite(),
540	>	TreeSubMapTest.suite(),
541	>	TreeSubSetTest.suite(),
542	>	VectorTest.suite());
543	>
544	>	// Java8+ test classes
545	>	if (atLeastJava8()) {
546	>	String[] java8TestClassNames = {
547	>	"ArrayDeque8Test",
548	>	"Atomic8Test",
549	>	"CompletableFutureTest",
550	>	"ConcurrentHashMap8Test",
551	>	"CountedCompleter8Test",
552	>	"DoubleAccumulatorTest",
553	>	"DoubleAdderTest",
554	>	"ForkJoinPool8Test",
555	>	"ForkJoinTask8Test",
556	>	"HashMapTest",
557	>	"LinkedBlockingDeque8Test",
558	>	"LinkedBlockingQueue8Test",
559	>	"LinkedHashMapTest",
560	>	"LongAccumulatorTest",
561	>	"LongAdderTest",
562	>	"SplittableRandomTest",
563	>	"StampedLockTest",
564	>	"SubmissionPublisherTest",
565	>	"ThreadLocalRandom8Test",
566	>	"TimeUnit8Test",
567	>	};
568	>	addNamedTestClasses(suite, java8TestClassNames);
569	>	}
570	>
571	>	// Java9+ test classes
572	>	if (atLeastJava9()) {
573	>	String[] java9TestClassNames = {
574	>	"AtomicBoolean9Test",
575	>	"AtomicInteger9Test",
576	>	"AtomicIntegerArray9Test",
577	>	"AtomicLong9Test",
578	>	"AtomicLongArray9Test",
579	>	"AtomicReference9Test",
580	>	"AtomicReferenceArray9Test",
581	>	"ExecutorCompletionService9Test",
582	>	"ForkJoinPool9Test",
583	>	};
584	>	addNamedTestClasses(suite, java9TestClassNames);
585	>	}
586	>
587		return suite;
588		}
589
590	+	/** Returns list of junit-style test method names in given class. */
591	+	public static ArrayList<String> testMethodNames(Class<?> testClass) {
592	+	Method[] methods = testClass.getDeclaredMethods();
593	+	ArrayList<String> names = new ArrayList<>(methods.length);
594	+	for (Method method : methods) {
595	+	if (method.getName().startsWith("test")
596	+	&& Modifier.isPublic(method.getModifiers())
597	+	// method.getParameterCount() requires jdk8+
598	+	&& method.getParameterTypes().length == 0) {
599	+	names.add(method.getName());
600	+	}
601	+	}
602	+	return names;
603	+	}
604	+
605	+	/**
606	+	* Returns junit-style testSuite for the given test class, but
607	+	* parameterized by passing extra data to each test.
608	+	*/
609	+	public static <ExtraData> Test parameterizedTestSuite
610	+	(Class<? extends JSR166TestCase> testClass,
611	+	Class<ExtraData> dataClass,
612	+	ExtraData data) {
613	+	try {
614	+	TestSuite suite = new TestSuite();
615	+	Constructor c =
616	+	testClass.getDeclaredConstructor(dataClass, String.class);
617	+	for (String methodName : testMethodNames(testClass))
618	+	suite.addTest((Test) c.newInstance(data, methodName));
619	+	return suite;
620	+	} catch (ReflectiveOperationException e) {
621	+	throw new AssertionError(e);
622	+	}
623	+	}
624	+
625	+	/**
626	+	* Returns junit-style testSuite for the jdk8 extension of the
627	+	* given test class, but parameterized by passing extra data to
628	+	* each test.  Uses reflection to allow compilation in jdk7.
629	+	*/
630	+	public static <ExtraData> Test jdk8ParameterizedTestSuite
631	+	(Class<? extends JSR166TestCase> testClass,
632	+	Class<ExtraData> dataClass,
633	+	ExtraData data) {
634	+	if (atLeastJava8()) {
635	+	String name = testClass.getName();
636	+	String name8 = name.replaceAll("Test$", "8Test");
637	+	if (name.equals(name8)) throw new AssertionError(name);
638	+	try {
639	+	return (Test)
640	+	Class.forName(name8)
641	+	.getMethod("testSuite", dataClass)
642	+	.invoke(null, data);
643	+	} catch (ReflectiveOperationException e) {
644	+	throw new AssertionError(e);
645	+	}
646	+	} else {
647	+	return new TestSuite();
648	+	}
649	+	}
650	+
651	+	// Delays for timing-dependent tests, in milliseconds.
652
653		public static long SHORT_DELAY_MS;
654		public static long SMALL_DELAY_MS;
655		public static long MEDIUM_DELAY_MS;
656		public static long LONG_DELAY_MS;
657
658	+	private static final long RANDOM_TIMEOUT;
659	+	private static final long RANDOM_EXPIRED_TIMEOUT;
660	+	private static final TimeUnit RANDOM_TIMEUNIT;
661	+	static {
662	+	ThreadLocalRandom rnd = ThreadLocalRandom.current();
663	+	long[] timeouts = { Long.MIN_VALUE, -1, 0, 1, Long.MAX_VALUE };
664	+	RANDOM_TIMEOUT = timeouts[rnd.nextInt(timeouts.length)];
665	+	RANDOM_EXPIRED_TIMEOUT = timeouts[rnd.nextInt(3)];
666	+	TimeUnit[] timeUnits = TimeUnit.values();
667	+	RANDOM_TIMEUNIT = timeUnits[rnd.nextInt(timeUnits.length)];
668	+	}
669	+
670	+	/**
671	+	* Returns a timeout for use when any value at all will do.
672	+	*/
673	+	static long randomTimeout() { return RANDOM_TIMEOUT; }
674	+
675	+	/**
676	+	* Returns a timeout that means "no waiting", i.e. not positive.
677	+	*/
678	+	static long randomExpiredTimeout() { return RANDOM_EXPIRED_TIMEOUT; }
679	+
680	+	/**
681	+	* Returns a random non-null TimeUnit.
682	+	*/
683	+	static TimeUnit randomTimeUnit() { return RANDOM_TIMEUNIT; }
684
685		/**
686	<	* Return the shortest timed delay. This could
687	<	* be reimplemented to use for example a Property.
688	<	*/
686	>	* Returns the shortest timed delay. This can be scaled up for
687	>	* slow machines using the jsr166.delay.factor system property,
688	>	* or via jtreg's -timeoutFactor: flag.
689	>	* http://openjdk.java.net/jtreg/command-help.html
690	>	*/
691		protected long getShortDelay() {
692	<	return 50;
692	>	return (long) (50 * delayFactor);
693		}
694
181	–
695		/**
696	<	* Set delays as multiples of SHORT_DELAY.
696	>	* Sets delays as multiples of SHORT_DELAY.
697		*/
698	<	protected  void setDelays() {
698	>	protected void setDelays() {
699		SHORT_DELAY_MS = getShortDelay();
700	<	SMALL_DELAY_MS = SHORT_DELAY_MS * 5;
700	>	SMALL_DELAY_MS  = SHORT_DELAY_MS * 5;
701		MEDIUM_DELAY_MS = SHORT_DELAY_MS * 10;
702	<	LONG_DELAY_MS = SHORT_DELAY_MS * 50;
702	>	LONG_DELAY_MS   = SHORT_DELAY_MS * 200;
703		}
704
705	+	private static final long TIMEOUT_DELAY_MS
706	+	= (long) (12.0 * Math.cbrt(delayFactor));
707	+
708		/**
709	<	* Flag set true if any threadAssert methods fail
709	>	* Returns a timeout in milliseconds to be used in tests that verify
710	>	* that operations block or time out.  We want this to be longer
711	>	* than the OS scheduling quantum, but not too long, so don't scale
712	>	* linearly with delayFactor; we use "crazy" cube root instead.
713		*/
714	<	volatile boolean threadFailed;
714	>	static long timeoutMillis() {
715	>	return TIMEOUT_DELAY_MS;
716	>	}
717
718		/**
719	<	* Initialize test to indicate that no thread assertions have failed
719	>	* Returns a new Date instance representing a time at least
720	>	* delayMillis milliseconds in the future.
721		*/
722	<	public void setUp() {
722	>	Date delayedDate(long delayMillis) {
723	>	// Add 1 because currentTimeMillis is known to round into the past.
724	>	return new Date(System.currentTimeMillis() + delayMillis + 1);
725	>	}
726	>
727	>	/**
728	>	* The first exception encountered if any threadAssertXXX method fails.
729	>	*/
730	>	private final AtomicReference<Throwable> threadFailure
731	>	= new AtomicReference<>(null);
732	>
733	>	/**
734	>	* Records an exception so that it can be rethrown later in the test
735	>	* harness thread, triggering a test case failure.  Only the first
736	>	* failure is recorded; subsequent calls to this method from within
737	>	* the same test have no effect.
738	>	*/
739	>	public void threadRecordFailure(Throwable t) {
740	>	System.err.println(t);
741	>	dumpTestThreads();
742	>	threadFailure.compareAndSet(null, t);
743	>	}
744	>
745	>	public void setUp() {
746		setDelays();
747	<	threadFailed = false;
747	>	}
748	>
749	>	void tearDownFail(String format, Object... args) {
750	>	String msg = toString() + ": " + String.format(format, args);
751	>	System.err.println(msg);
752	>	dumpTestThreads();
753	>	throw new AssertionError(msg);
754	>	}
755	>
756	>	/**
757	>	* Extra checks that get done for all test cases.
758	>	*
759	>	* Triggers test case failure if any thread assertions have failed,
760	>	* by rethrowing, in the test harness thread, any exception recorded
761	>	* earlier by threadRecordFailure.
762	>	*
763	>	* Triggers test case failure if interrupt status is set in the main thread.
764	>	*/
765	>	public void tearDown() throws Exception {
766	>	Throwable t = threadFailure.getAndSet(null);
767	>	if (t != null) {
768	>	if (t instanceof Error)
769	>	throw (Error) t;
770	>	else if (t instanceof RuntimeException)
771	>	throw (RuntimeException) t;
772	>	else if (t instanceof Exception)
773	>	throw (Exception) t;
774	>	else
775	>	throw new AssertionError(t.toString(), t);
776	>	}
777	>
778	>	if (Thread.interrupted())
779	>	tearDownFail("interrupt status set in main thread");
780	>
781	>	checkForkJoinPoolThreadLeaks();
782		}
783
784		/**
785	<	* Trigger test case failure if any thread assertions have failed
785	>	* Finds missing PoolCleaners
786		*/
787	<	public void tearDown() {
788	<	assertFalse(threadFailed);
787	>	void checkForkJoinPoolThreadLeaks() throws InterruptedException {
788	>	Thread[] survivors = new Thread[7];
789	>	int count = Thread.enumerate(survivors);
790	>	for (int i = 0; i < count; i++) {
791	>	Thread thread = survivors[i];
792	>	String name = thread.getName();
793	>	if (name.startsWith("ForkJoinPool-")) {
794	>	// give thread some time to terminate
795	>	thread.join(LONG_DELAY_MS);
796	>	if (thread.isAlive())
797	>	tearDownFail("Found leaked ForkJoinPool thread thread=%s",
798	>	thread);
799	>	}
800	>	}
801	>
802	>	if (!ForkJoinPool.commonPool()
803	>	.awaitQuiescence(LONG_DELAY_MS, MILLISECONDS))
804	>	tearDownFail("ForkJoin common pool thread stuck");
805		}
806
807		/**
808	<	* Fail, also setting status to indicate current testcase should fail
809	<	*/
808	>	* Just like fail(reason), but additionally recording (using
809	>	* threadRecordFailure) any AssertionError thrown, so that the
810	>	* current testcase will fail.
811	>	*/
812		public void threadFail(String reason) {
813	<	threadFailed = true;
814	<	fail(reason);
813	>	try {
814	>	fail(reason);
815	>	} catch (AssertionError fail) {
816	>	threadRecordFailure(fail);
817	>	throw fail;
818	>	}
819		}
820
821		/**
822	<	* If expression not true, set status to indicate current testcase
823	<	* should fail
824	<	*/
822	>	* Just like assertTrue(b), but additionally recording (using
823	>	* threadRecordFailure) any AssertionError thrown, so that the
824	>	* current testcase will fail.
825	>	*/
826		public void threadAssertTrue(boolean b) {
827	<	if (!b) {
226	<	threadFailed = true;
827	>	try {
828		assertTrue(b);
829	+	} catch (AssertionError fail) {
830	+	threadRecordFailure(fail);
831	+	throw fail;
832		}
833		}
834
835		/**
836	<	* If expression not false, set status to indicate current testcase
837	<	* should fail
838	<	*/
836	>	* Just like assertFalse(b), but additionally recording (using
837	>	* threadRecordFailure) any AssertionError thrown, so that the
838	>	* current testcase will fail.
839	>	*/
840		public void threadAssertFalse(boolean b) {
841	<	if (b) {
237	<	threadFailed = true;
841	>	try {
842		assertFalse(b);
843	+	} catch (AssertionError fail) {
844	+	threadRecordFailure(fail);
845	+	throw fail;
846		}
847		}
848
849		/**
850	<	* If argument not null, set status to indicate current testcase
851	<	* should fail
852	<	*/
850	>	* Just like assertNull(x), but additionally recording (using
851	>	* threadRecordFailure) any AssertionError thrown, so that the
852	>	* current testcase will fail.
853	>	*/
854		public void threadAssertNull(Object x) {
855	<	if (x != null) {
248	<	threadFailed = true;
855	>	try {
856		assertNull(x);
857	+	} catch (AssertionError fail) {
858	+	threadRecordFailure(fail);
859	+	throw fail;
860		}
861		}
862
863		/**
864	<	* If arguments not equal, set status to indicate current testcase
865	<	* should fail
866	<	*/
864	>	* Just like assertEquals(x, y), but additionally recording (using
865	>	* threadRecordFailure) any AssertionError thrown, so that the
866	>	* current testcase will fail.
867	>	*/
868		public void threadAssertEquals(long x, long y) {
869	<	if (x != y) {
259	<	threadFailed = true;
869	>	try {
870		assertEquals(x, y);
871	+	} catch (AssertionError fail) {
872	+	threadRecordFailure(fail);
873	+	throw fail;
874		}
875		}
876
877		/**
878	<	* If arguments not equal, set status to indicate current testcase
879	<	* should fail
880	<	*/
878	>	* Just like assertEquals(x, y), but additionally recording (using
879	>	* threadRecordFailure) any AssertionError thrown, so that the
880	>	* current testcase will fail.
881	>	*/
882		public void threadAssertEquals(Object x, Object y) {
883	<	if (x != y && (x == null || !x.equals(y))) {
270	<	threadFailed = true;
883	>	try {
884		assertEquals(x, y);
885	+	} catch (AssertionError fail) {
886	+	threadRecordFailure(fail);
887	+	throw fail;
888	+	} catch (Throwable fail) {
889	+	threadUnexpectedException(fail);
890		}
891		}
892
893		/**
894	<	* threadFail with message "should throw exception"
895	<	*/
894	>	* Just like assertSame(x, y), but additionally recording (using
895	>	* threadRecordFailure) any AssertionError thrown, so that the
896	>	* current testcase will fail.
897	>	*/
898	>	public void threadAssertSame(Object x, Object y) {
899	>	try {
900	>	assertSame(x, y);
901	>	} catch (AssertionError fail) {
902	>	threadRecordFailure(fail);
903	>	throw fail;
904	>	}
905	>	}
906	>
907	>	/**
908	>	* Calls threadFail with message "should throw exception".
909	>	*/
910		public void threadShouldThrow() {
911	<	threadFailed = true;
912	<	fail("should throw exception");
911	>	threadFail("should throw exception");
912	>	}
913	>
914	>	/**
915	>	* Calls threadFail with message "should throw" + exceptionName.
916	>	*/
917	>	public void threadShouldThrow(String exceptionName) {
918	>	threadFail("should throw " + exceptionName);
919	>	}
920	>
921	>	/**
922	>	* Records the given exception using {@link #threadRecordFailure},
923	>	* then rethrows the exception, wrapping it in an AssertionError
924	>	* if necessary.
925	>	*/
926	>	public void threadUnexpectedException(Throwable t) {
927	>	threadRecordFailure(t);
928	>	t.printStackTrace();
929	>	if (t instanceof RuntimeException)
930	>	throw (RuntimeException) t;
931	>	else if (t instanceof Error)
932	>	throw (Error) t;
933	>	else
934	>	throw new AssertionError("unexpected exception: " + t, t);
935		}
936
937		/**
938	<	* threadFail with message "Unexpected exception"
938	>	* Delays, via Thread.sleep, for the given millisecond delay, but
939	>	* if the sleep is shorter than specified, may re-sleep or yield
940	>	* until time elapses.  Ensures that the given time, as measured
941	>	* by System.nanoTime(), has elapsed.
942		*/
943	<	public void threadUnexpectedException() {
944	<	threadFailed = true;
945	<	fail("Unexpected exception");
943	>	static void delay(long millis) throws InterruptedException {
944	>	long nanos = millis * (1000 * 1000);
945	>	final long wakeupTime = System.nanoTime() + nanos;
946	>	do {
947	>	if (millis > 0L)
948	>	Thread.sleep(millis);
949	>	else // too short to sleep
950	>	Thread.yield();
951	>	nanos = wakeupTime - System.nanoTime();
952	>	millis = nanos / (1000 * 1000);
953	>	} while (nanos >= 0L);
954	>	}
955	>
956	>	/**
957	>	* Allows use of try-with-resources with per-test thread pools.
958	>	*/
959	>	class PoolCleaner implements AutoCloseable {
960	>	private final ExecutorService pool;
961	>	public PoolCleaner(ExecutorService pool) { this.pool = pool; }
962	>	public void close() { joinPool(pool); }
963	>	}
964	>
965	>	/**
966	>	* An extension of PoolCleaner that has an action to release the pool.
967	>	*/
968	>	class PoolCleanerWithReleaser extends PoolCleaner {
969	>	private final Runnable releaser;
970	>	public PoolCleanerWithReleaser(ExecutorService pool, Runnable releaser) {
971	>	super(pool);
972	>	this.releaser = releaser;
973	>	}
974	>	public void close() {
975	>	try {
976	>	releaser.run();
977	>	} finally {
978	>	super.close();
979	>	}
980	>	}
981	>	}
982	>
983	>	PoolCleaner cleaner(ExecutorService pool) {
984	>	return new PoolCleaner(pool);
985	>	}
986	>
987	>	PoolCleaner cleaner(ExecutorService pool, Runnable releaser) {
988	>	return new PoolCleanerWithReleaser(pool, releaser);
989	>	}
990	>
991	>	PoolCleaner cleaner(ExecutorService pool, CountDownLatch latch) {
992	>	return new PoolCleanerWithReleaser(pool, releaser(latch));
993	>	}
994	>
995	>	Runnable releaser(final CountDownLatch latch) {
996	>	return new Runnable() { public void run() {
997	>	do { latch.countDown(); }
998	>	while (latch.getCount() > 0);
999	>	}};
1000		}
1001
1002	+	PoolCleaner cleaner(ExecutorService pool, AtomicBoolean flag) {
1003	+	return new PoolCleanerWithReleaser(pool, releaser(flag));
1004	+	}
1005	+
1006	+	Runnable releaser(final AtomicBoolean flag) {
1007	+	return new Runnable() { public void run() { flag.set(true); }};
1008	+	}
1009
1010		/**
1011	<	* Wait out termination of a thread pool or fail doing so
1011	>	* Waits out termination of a thread pool or fails doing so.
1012		*/
1013	<	public void joinPool(ExecutorService exec) {
1013	>	void joinPool(ExecutorService pool) {
1014		try {
1015	<	exec.shutdown();
1016	<	assertTrue(exec.awaitTermination(LONG_DELAY_MS, TimeUnit.MILLISECONDS));
1017	<	} catch(SecurityException ok) {
1015	>	pool.shutdown();
1016	>	if (!pool.awaitTermination(2 * LONG_DELAY_MS, MILLISECONDS)) {
1017	>	try {
1018	>	threadFail("ExecutorService " + pool +
1019	>	" did not terminate in a timely manner");
1020	>	} finally {
1021	>	// last resort, for the benefit of subsequent tests
1022	>	pool.shutdownNow();
1023	>	pool.awaitTermination(MEDIUM_DELAY_MS, MILLISECONDS);
1024	>	}
1025	>	}
1026	>	} catch (SecurityException ok) {
1027		// Allowed in case test doesn't have privs
1028	<	} catch(InterruptedException ie) {
1029	<	fail("Unexpected exception");
1028	>	} catch (InterruptedException fail) {
1029	>	threadFail("Unexpected InterruptedException");
1030		}
1031		}
1032
1033	+	/**
1034	+	* Like Runnable, but with the freedom to throw anything.
1035	+	* junit folks had the same idea:
1036	+	* http://junit.org/junit5/docs/snapshot/api/org/junit/gen5/api/Executable.html
1037	+	*/
1038	+	interface Action { public void run() throws Throwable; }
1039
1040		/**
1041	<	* fail with message "should throw exception"
1042	<	*/
1041	>	* Runs all the given actions in parallel, failing if any fail.
1042	>	* Useful for running multiple variants of tests that are
1043	>	* necessarily individually slow because they must block.
1044	>	*/
1045	>	void testInParallel(Action ... actions) {
1046	>	ExecutorService pool = Executors.newCachedThreadPool();
1047	>	try (PoolCleaner cleaner = cleaner(pool)) {
1048	>	ArrayList<Future<?>> futures = new ArrayList<>(actions.length);
1049	>	for (final Action action : actions)
1050	>	futures.add(pool.submit(new CheckedRunnable() {
1051	>	public void realRun() throws Throwable { action.run();}}));
1052	>	for (Future<?> future : futures)
1053	>	try {
1054	>	assertNull(future.get(LONG_DELAY_MS, MILLISECONDS));
1055	>	} catch (ExecutionException ex) {
1056	>	threadUnexpectedException(ex.getCause());
1057	>	} catch (Exception ex) {
1058	>	threadUnexpectedException(ex);
1059	>	}
1060	>	}
1061	>	}
1062	>
1063	>	/**
1064	>	* A debugging tool to print stack traces of most threads, as jstack does.
1065	>	* Uninteresting threads are filtered out.
1066	>	*/
1067	>	static void dumpTestThreads() {
1068	>	SecurityManager sm = System.getSecurityManager();
1069	>	if (sm != null) {
1070	>	try {
1071	>	System.setSecurityManager(null);
1072	>	} catch (SecurityException giveUp) {
1073	>	return;
1074	>	}
1075	>	}
1076	>
1077	>	ThreadMXBean threadMXBean = ManagementFactory.getThreadMXBean();
1078	>	System.err.println("------ stacktrace dump start ------");
1079	>	for (ThreadInfo info : threadMXBean.dumpAllThreads(true, true)) {
1080	>	final String name = info.getThreadName();
1081	>	String lockName;
1082	>	if ("Signal Dispatcher".equals(name))
1083	>	continue;
1084	>	if ("Reference Handler".equals(name)
1085	>	&& (lockName = info.getLockName()) != null
1086	>	&& lockName.startsWith("java.lang.ref.Reference$Lock"))
1087	>	continue;
1088	>	if ("Finalizer".equals(name)
1089	>	&& (lockName = info.getLockName()) != null
1090	>	&& lockName.startsWith("java.lang.ref.ReferenceQueue$Lock"))
1091	>	continue;
1092	>	if ("checkForWedgedTest".equals(name))
1093	>	continue;
1094	>	System.err.print(info);
1095	>	}
1096	>	System.err.println("------ stacktrace dump end ------");
1097	>
1098	>	if (sm != null) System.setSecurityManager(sm);
1099	>	}
1100	>
1101	>	/**
1102	>	* Checks that thread eventually enters the expected blocked thread state.
1103	>	*/
1104	>	void assertThreadBlocks(Thread thread, Thread.State expected) {
1105	>	// always sleep at least 1 ms, with high probability avoiding
1106	>	// transitory states
1107	>	for (long retries = LONG_DELAY_MS * 3 / 4; retries-->0; ) {
1108	>	try { delay(1); }
1109	>	catch (InterruptedException fail) {
1110	>	throw new AssertionError("Unexpected InterruptedException", fail);
1111	>	}
1112	>	Thread.State s = thread.getState();
1113	>	if (s == expected)
1114	>	return;
1115	>	else if (s == Thread.State.TERMINATED)
1116	>	fail("Unexpected thread termination");
1117	>	}
1118	>	fail("timed out waiting for thread to enter thread state " + expected);
1119	>	}
1120	>
1121	>	/**
1122	>	* Checks that future.get times out, with the default timeout of
1123	>	* {@code timeoutMillis()}.
1124	>	*/
1125	>	void assertFutureTimesOut(Future future) {
1126	>	assertFutureTimesOut(future, timeoutMillis());
1127	>	}
1128	>
1129	>	/**
1130	>	* Checks that future.get times out, with the given millisecond timeout.
1131	>	*/
1132	>	void assertFutureTimesOut(Future future, long timeoutMillis) {
1133	>	long startTime = System.nanoTime();
1134	>	try {
1135	>	future.get(timeoutMillis, MILLISECONDS);
1136	>	shouldThrow();
1137	>	} catch (TimeoutException success) {
1138	>	} catch (Exception fail) {
1139	>	threadUnexpectedException(fail);
1140	>	} finally { future.cancel(true); }
1141	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
1142	>	}
1143	>
1144	>	/**
1145	>	* Fails with message "should throw exception".
1146	>	*/
1147		public void shouldThrow() {
1148		fail("Should throw exception");
1149		}
1150
1151		/**
1152	<	* fail with message "Unexpected exception"
1152	>	* Fails with message "should throw " + exceptionName.
1153		*/
1154	<	public void unexpectedException() {
1155	<	fail("Unexpected exception");
1154	>	public void shouldThrow(String exceptionName) {
1155	>	fail("Should throw " + exceptionName);
1156		}
1157
1158	+	/**
1159	+	* The maximum number of consecutive spurious wakeups we should
1160	+	* tolerate (from APIs like LockSupport.park) before failing a test.
1161	+	*/
1162	+	static final int MAX_SPURIOUS_WAKEUPS = 10;
1163
1164		/**
1165		* The number of elements to place in collections, arrays, etc.
1166		*/
1167	<	static final int SIZE = 20;
1167	>	public static final int SIZE = 20;
1168
1169		// Some convenient Integer constants
1170
1171	<	static final Integer zero = new Integer(0);
1172	<	static final Integer one = new Integer(1);
1173	<	static final Integer two = new Integer(2);
1174	<	static final Integer three  = new Integer(3);
1175	<	static final Integer four  = new Integer(4);
1176	<	static final Integer five  = new Integer(5);
1177	<	static final Integer six = new Integer(6);
1178	<	static final Integer seven = new Integer(7);
1179	<	static final Integer eight = new Integer(8);
1180	<	static final Integer nine = new Integer(9);
1181	<	static final Integer m1  = new Integer(-1);
1182	<	static final Integer m2  = new Integer(-2);
1183	<	static final Integer m3  = new Integer(-3);
1184	<	static final Integer m4 = new Integer(-4);
1185	<	static final Integer m5 = new Integer(-5);
1186	<	static final Integer m10 = new Integer(-10);
1171	>	public static final Integer zero  = new Integer(0);
1172	>	public static final Integer one   = new Integer(1);
1173	>	public static final Integer two   = new Integer(2);
1174	>	public static final Integer three = new Integer(3);
1175	>	public static final Integer four  = new Integer(4);
1176	>	public static final Integer five  = new Integer(5);
1177	>	public static final Integer six   = new Integer(6);
1178	>	public static final Integer seven = new Integer(7);
1179	>	public static final Integer eight = new Integer(8);
1180	>	public static final Integer nine  = new Integer(9);
1181	>	public static final Integer m1  = new Integer(-1);
1182	>	public static final Integer m2  = new Integer(-2);
1183	>	public static final Integer m3  = new Integer(-3);
1184	>	public static final Integer m4  = new Integer(-4);
1185	>	public static final Integer m5  = new Integer(-5);
1186	>	public static final Integer m6  = new Integer(-6);
1187	>	public static final Integer m10 = new Integer(-10);
1188	>
1189	>	/**
1190	>	* Runs Runnable r with a security policy that permits precisely
1191	>	* the specified permissions.  If there is no current security
1192	>	* manager, the runnable is run twice, both with and without a
1193	>	* security manager.  We require that any security manager permit
1194	>	* getPolicy/setPolicy.
1195	>	*/
1196	>	public void runWithPermissions(Runnable r, Permission... permissions) {
1197	>	SecurityManager sm = System.getSecurityManager();
1198	>	if (sm == null) {
1199	>	r.run();
1200	>	}
1201	>	runWithSecurityManagerWithPermissions(r, permissions);
1202	>	}
1203
1204	+	/**
1205	+	* Runs Runnable r with a security policy that permits precisely
1206	+	* the specified permissions.  If there is no current security
1207	+	* manager, a temporary one is set for the duration of the
1208	+	* Runnable.  We require that any security manager permit
1209	+	* getPolicy/setPolicy.
1210	+	*/
1211	+	public void runWithSecurityManagerWithPermissions(Runnable r,
1212	+	Permission... permissions) {
1213	+	SecurityManager sm = System.getSecurityManager();
1214	+	if (sm == null) {
1215	+	Policy savedPolicy = Policy.getPolicy();
1216	+	try {
1217	+	Policy.setPolicy(permissivePolicy());
1218	+	System.setSecurityManager(new SecurityManager());
1219	+	runWithSecurityManagerWithPermissions(r, permissions);
1220	+	} finally {
1221	+	System.setSecurityManager(null);
1222	+	Policy.setPolicy(savedPolicy);
1223	+	}
1224	+	} else {
1225	+	Policy savedPolicy = Policy.getPolicy();
1226	+	AdjustablePolicy policy = new AdjustablePolicy(permissions);
1227	+	Policy.setPolicy(policy);
1228	+
1229	+	try {
1230	+	r.run();
1231	+	} finally {
1232	+	policy.addPermission(new SecurityPermission("setPolicy"));
1233	+	Policy.setPolicy(savedPolicy);
1234	+	}
1235	+	}
1236	+	}
1237	+
1238	+	/**
1239	+	* Runs a runnable without any permissions.
1240	+	*/
1241	+	public void runWithoutPermissions(Runnable r) {
1242	+	runWithPermissions(r);
1243	+	}
1244
1245		/**
1246		* A security policy where new permissions can be dynamically added
1247		* or all cleared.
1248		*/
1249	<	static class AdjustablePolicy extends java.security.Policy {
1249	>	public static class AdjustablePolicy extends java.security.Policy {
1250		Permissions perms = new Permissions();
1251	<	AdjustablePolicy() { }
1251	>	AdjustablePolicy(Permission... permissions) {
1252	>	for (Permission permission : permissions)
1253	>	perms.add(permission);
1254	>	}
1255		void addPermission(Permission perm) { perms.add(perm); }
1256		void clearPermissions() { perms = new Permissions(); }
1257	<	public PermissionCollection getPermissions(CodeSource cs) {
1258	<	return perms;
1259	<	}
1260	<	public PermissionCollection getPermissions(ProtectionDomain pd) {
1261	<	return perms;
1262	<	}
1263	<	public boolean implies(ProtectionDomain pd, Permission p) {
1264	<	return perms.implies(p);
1265	<	}
1266	<	public void refresh() {}
1257	>	public PermissionCollection getPermissions(CodeSource cs) {
1258	>	return perms;
1259	>	}
1260	>	public PermissionCollection getPermissions(ProtectionDomain pd) {
1261	>	return perms;
1262	>	}
1263	>	public boolean implies(ProtectionDomain pd, Permission p) {
1264	>	return perms.implies(p);
1265	>	}
1266	>	public void refresh() {}
1267	>	public String toString() {
1268	>	List<Permission> ps = new ArrayList<>();
1269	>	for (Enumeration<Permission> e = perms.elements(); e.hasMoreElements();)
1270	>	ps.add(e.nextElement());
1271	>	return "AdjustablePolicy with permissions " + ps;
1272	>	}
1273		}
1274
1275	+	/**
1276	+	* Returns a policy containing all the permissions we ever need.
1277	+	*/
1278	+	public static Policy permissivePolicy() {
1279	+	return new AdjustablePolicy
1280	+	// Permissions j.u.c. needs directly
1281	+	(new RuntimePermission("modifyThread"),
1282	+	new RuntimePermission("getClassLoader"),
1283	+	new RuntimePermission("setContextClassLoader"),
1284	+	// Permissions needed to change permissions!
1285	+	new SecurityPermission("getPolicy"),
1286	+	new SecurityPermission("setPolicy"),
1287	+	new RuntimePermission("setSecurityManager"),
1288	+	// Permissions needed by the junit test harness
1289	+	new RuntimePermission("accessDeclaredMembers"),
1290	+	new PropertyPermission("*", "read"),
1291	+	new java.io.FilePermission("<<ALL FILES>>", "read"));
1292	+	}
1293
1294	<	// Some convenient Runnable classes
1294	>	/**
1295	>	* Sleeps until the given time has elapsed.
1296	>	* Throws AssertionError if interrupted.
1297	>	*/
1298	>	static void sleep(long millis) {
1299	>	try {
1300	>	delay(millis);
1301	>	} catch (InterruptedException fail) {
1302	>	throw new AssertionError("Unexpected InterruptedException", fail);
1303	>	}
1304	>	}
1305
1306	<	static class NoOpRunnable implements Runnable {
1307	<	public void run() {}
1306	>	/**
1307	>	* Spin-waits up to the specified number of milliseconds for the given
1308	>	* thread to enter a wait state: BLOCKED, WAITING, or TIMED_WAITING.
1309	>	* @param waitingForGodot if non-null, an additional condition to satisfy
1310	>	*/
1311	>	void waitForThreadToEnterWaitState(Thread thread, long timeoutMillis,
1312	>	Callable<Boolean> waitingForGodot) {
1313	>	for (long startTime = 0L;;) {
1314	>	switch (thread.getState()) {
1315	>	default: break;
1316	>	case BLOCKED: case WAITING: case TIMED_WAITING:
1317	>	try {
1318	>	if (waitingForGodot == null || waitingForGodot.call())
1319	>	return;
1320	>	} catch (Throwable fail) { threadUnexpectedException(fail); }
1321	>	break;
1322	>	case TERMINATED:
1323	>	fail("Unexpected thread termination");
1324	>	}
1325	>
1326	>	if (startTime == 0L)
1327	>	startTime = System.nanoTime();
1328	>	else if (millisElapsedSince(startTime) > timeoutMillis) {
1329	>	assertTrue(thread.isAlive());
1330	>	if (waitingForGodot == null
1331	>	|| thread.getState() == Thread.State.RUNNABLE)
1332	>	fail("timed out waiting for thread to enter wait state");
1333	>	else
1334	>	fail("timed out waiting for condition, thread state="
1335	>	+ thread.getState());
1336	>	}
1337	>	Thread.yield();
1338	>	}
1339		}
1340
1341	<	static class NoOpCallable implements Callable {
1342	<	public Object call() { return Boolean.TRUE; }
1341	>	/**
1342	>	* Spin-waits up to the specified number of milliseconds for the given
1343	>	* thread to enter a wait state: BLOCKED, WAITING, or TIMED_WAITING.
1344	>	*/
1345	>	void waitForThreadToEnterWaitState(Thread thread, long timeoutMillis) {
1346	>	waitForThreadToEnterWaitState(thread, timeoutMillis, null);
1347		}
1348
1349	<	static final String TEST_STRING = "a test string";
1349	>	/**
1350	>	* Spin-waits up to LONG_DELAY_MS milliseconds for the given thread to
1351	>	* enter a wait state: BLOCKED, WAITING, or TIMED_WAITING.
1352	>	*/
1353	>	void waitForThreadToEnterWaitState(Thread thread) {
1354	>	waitForThreadToEnterWaitState(thread, LONG_DELAY_MS, null);
1355	>	}
1356
1357	<	static class StringTask implements Callable<String> {
1358	<	public String call() { return TEST_STRING; }
1357	>	/**
1358	>	* Spin-waits up to LONG_DELAY_MS milliseconds for the given thread to
1359	>	* enter a wait state: BLOCKED, WAITING, or TIMED_WAITING,
1360	>	* and additionally satisfy the given condition.
1361	>	*/
1362	>	void waitForThreadToEnterWaitState(Thread thread,
1363	>	Callable<Boolean> waitingForGodot) {
1364	>	waitForThreadToEnterWaitState(thread, LONG_DELAY_MS, waitingForGodot);
1365		}
1366
1367	<	static class NPETask implements Callable<String> {
1368	<	public String call() { throw new NullPointerException(); }
1367	>	/**
1368	>	* Returns the number of milliseconds since time given by
1369	>	* startNanoTime, which must have been previously returned from a
1370	>	* call to {@link System#nanoTime()}.
1371	>	*/
1372	>	static long millisElapsedSince(long startNanoTime) {
1373	>	return NANOSECONDS.toMillis(System.nanoTime() - startNanoTime);
1374	>	}
1375	>
1376	>	//     void assertTerminatesPromptly(long timeoutMillis, Runnable r) {
1377	>	//         long startTime = System.nanoTime();
1378	>	//         try {
1379	>	//             r.run();
1380	>	//         } catch (Throwable fail) { threadUnexpectedException(fail); }
1381	>	//         if (millisElapsedSince(startTime) > timeoutMillis/2)
1382	>	//             throw new AssertionError("did not return promptly");
1383	>	//     }
1384	>
1385	>	//     void assertTerminatesPromptly(Runnable r) {
1386	>	//         assertTerminatesPromptly(LONG_DELAY_MS/2, r);
1387	>	//     }
1388	>
1389	>	/**
1390	>	* Checks that timed f.get() returns the expected value, and does not
1391	>	* wait for the timeout to elapse before returning.
1392	>	*/
1393	>	<T> void checkTimedGet(Future<T> f, T expectedValue, long timeoutMillis) {
1394	>	long startTime = System.nanoTime();
1395	>	T actual = null;
1396	>	try {
1397	>	actual = f.get(timeoutMillis, MILLISECONDS);
1398	>	} catch (Throwable fail) { threadUnexpectedException(fail); }
1399	>	assertEquals(expectedValue, actual);
1400	>	if (millisElapsedSince(startTime) > timeoutMillis/2)
1401	>	throw new AssertionError("timed get did not return promptly");
1402		}
1403
1404	<	static class CallableOne implements Callable<Integer> {
1405	<	public Integer call() { return one; }
1404	>	<T> void checkTimedGet(Future<T> f, T expectedValue) {
1405	>	checkTimedGet(f, expectedValue, LONG_DELAY_MS);
1406		}
1407
1408	<	class ShortRunnable implements Runnable {
1409	<	public void run() {
1410	<	try {
1411	<	Thread.sleep(SHORT_DELAY_MS);
1412	<	}
1413	<	catch(Exception e) {
1414	<	threadUnexpectedException();
1415	<	}
401	<	}
1408	>	/**
1409	>	* Returns a new started daemon Thread running the given runnable.
1410	>	*/
1411	>	Thread newStartedThread(Runnable runnable) {
1412	>	Thread t = new Thread(runnable);
1413	>	t.setDaemon(true);
1414	>	t.start();
1415	>	return t;
1416		}
1417
1418	<	class ShortInterruptedRunnable implements Runnable {
1419	<	public void run() {
1420	<	try {
1421	<	Thread.sleep(SHORT_DELAY_MS);
1422	<	threadShouldThrow();
1423	<	}
1424	<	catch(InterruptedException success) {
1418	>	/**
1419	>	* Waits for the specified time (in milliseconds) for the thread
1420	>	* to terminate (using {@link Thread#join(long)}), else interrupts
1421	>	* the thread (in the hope that it may terminate later) and fails.
1422	>	*/
1423	>	void awaitTermination(Thread t, long timeoutMillis) {
1424	>	try {
1425	>	t.join(timeoutMillis);
1426	>	} catch (InterruptedException fail) {
1427	>	threadUnexpectedException(fail);
1428	>	} finally {
1429	>	if (t.getState() != Thread.State.TERMINATED) {
1430	>	t.interrupt();
1431	>	threadFail("timed out waiting for thread to terminate");
1432		}
1433		}
1434		}
1435
1436	<	class SmallRunnable implements Runnable {
1437	<	public void run() {
1436	>	/**
1437	>	* Waits for LONG_DELAY_MS milliseconds for the thread to
1438	>	* terminate (using {@link Thread#join(long)}), else interrupts
1439	>	* the thread (in the hope that it may terminate later) and fails.
1440	>	*/
1441	>	void awaitTermination(Thread t) {
1442	>	awaitTermination(t, LONG_DELAY_MS);
1443	>	}
1444	>
1445	>	// Some convenient Runnable classes
1446	>
1447	>	public abstract class CheckedRunnable implements Runnable {
1448	>	protected abstract void realRun() throws Throwable;
1449	>
1450	>	public final void run() {
1451		try {
1452	<	Thread.sleep(SMALL_DELAY_MS);
1453	<	}
1454	<	catch(Exception e) {
421	<	threadUnexpectedException();
1452	>	realRun();
1453	>	} catch (Throwable fail) {
1454	>	threadUnexpectedException(fail);
1455		}
1456		}
1457		}
1458
1459	<	class SmallPossiblyInterruptedRunnable implements Runnable {
1460	<	public void run() {
1459	>	public abstract class ThreadShouldThrow extends Thread {
1460	>	protected abstract void realRun() throws Throwable;
1461	>
1462	>	final Class<?> exceptionClass;
1463	>
1464	>	<T extends Throwable> ThreadShouldThrow(Class<T> exceptionClass) {
1465	>	this.exceptionClass = exceptionClass;
1466	>	}
1467	>
1468	>	public final void run() {
1469		try {
1470	<	Thread.sleep(SMALL_DELAY_MS);
1471	<	}
1472	<	catch(Exception e) {
1470	>	realRun();
1471	>	} catch (Throwable t) {
1472	>	if (! exceptionClass.isInstance(t))
1473	>	threadUnexpectedException(t);
1474	>	return;
1475		}
1476	+	threadShouldThrow(exceptionClass.getSimpleName());
1477		}
1478		}
1479
1480	<	class SmallCallable implements Callable {
1481	<	public Object call() {
1480	>	public abstract class CheckedInterruptedRunnable implements Runnable {
1481	>	protected abstract void realRun() throws Throwable;
1482	>
1483	>	public final void run() {
1484		try {
1485	<	Thread.sleep(SMALL_DELAY_MS);
1486	<	}
1487	<	catch(Exception e) {
1488	<	threadUnexpectedException();
1485	>	realRun();
1486	>	} catch (InterruptedException success) {
1487	>	threadAssertFalse(Thread.interrupted());
1488	>	return;
1489	>	} catch (Throwable fail) {
1490	>	threadUnexpectedException(fail);
1491		}
1492	<	return Boolean.TRUE;
1492	>	threadShouldThrow("InterruptedException");
1493		}
1494		}
1495
1496	<	class SmallInterruptedRunnable implements Runnable {
1497	<	public void run() {
1496	>	public abstract class CheckedCallable<T> implements Callable<T> {
1497	>	protected abstract T realCall() throws Throwable;
1498	>
1499	>	public final T call() {
1500		try {
1501	<	Thread.sleep(SMALL_DELAY_MS);
1502	<	threadShouldThrow();
1503	<	}
454	<	catch(InterruptedException success) {
1501	>	return realCall();
1502	>	} catch (Throwable fail) {
1503	>	threadUnexpectedException(fail);
1504		}
1505	+	throw new AssertionError("unreached");
1506		}
1507		}
1508
1509	+	public static class NoOpRunnable implements Runnable {
1510	+	public void run() {}
1511	+	}
1512
1513	<	class MediumRunnable implements Runnable {
1514	<	public void run() {
1515	<	try {
1516	<	Thread.sleep(MEDIUM_DELAY_MS);
1517	<	}
1518	<	catch(Exception e) {
1519	<	threadUnexpectedException();
1520	<	}
1513	>	public static class NoOpCallable implements Callable {
1514	>	public Object call() { return Boolean.TRUE; }
1515	>	}
1516	>
1517	>	public static final String TEST_STRING = "a test string";
1518	>
1519	>	public static class StringTask implements Callable<String> {
1520	>	final String value;
1521	>	public StringTask() { this(TEST_STRING); }
1522	>	public StringTask(String value) { this.value = value; }
1523	>	public String call() { return value; }
1524	>	}
1525	>
1526	>	public Callable<String> latchAwaitingStringTask(final CountDownLatch latch) {
1527	>	return new CheckedCallable<String>() {
1528	>	protected String realCall() {
1529	>	try {
1530	>	latch.await();
1531	>	} catch (InterruptedException quittingTime) {}
1532	>	return TEST_STRING;
1533	>	}};
1534	>	}
1535	>
1536	>	public Runnable countDowner(final CountDownLatch latch) {
1537	>	return new CheckedRunnable() {
1538	>	public void realRun() throws InterruptedException {
1539	>	latch.countDown();
1540	>	}};
1541	>	}
1542	>
1543	>	class LatchAwaiter extends CheckedRunnable {
1544	>	static final int NEW = 0;
1545	>	static final int RUNNING = 1;
1546	>	static final int DONE = 2;
1547	>	final CountDownLatch latch;
1548	>	int state = NEW;
1549	>	LatchAwaiter(CountDownLatch latch) { this.latch = latch; }
1550	>	public void realRun() throws InterruptedException {
1551	>	state = 1;
1552	>	await(latch);
1553	>	state = 2;
1554		}
1555		}
1556
1557	<	class MediumInterruptedRunnable implements Runnable {
1558	<	public void run() {
1559	<	try {
1560	<	Thread.sleep(MEDIUM_DELAY_MS);
1561	<	threadShouldThrow();
1562	<	}
1563	<	catch(InterruptedException success) {
1564	<	}
1557	>	public LatchAwaiter awaiter(CountDownLatch latch) {
1558	>	return new LatchAwaiter(latch);
1559	>	}
1560	>
1561	>	public void await(CountDownLatch latch, long timeoutMillis) {
1562	>	boolean timedOut = false;
1563	>	try {
1564	>	timedOut = !latch.await(timeoutMillis, MILLISECONDS);
1565	>	} catch (Throwable fail) {
1566	>	threadUnexpectedException(fail);
1567		}
1568	+	if (timedOut)
1569	+	fail("timed out waiting for CountDownLatch for "
1570	+	+ (timeoutMillis/1000) + " sec");
1571		}
1572
1573	<	class MediumPossiblyInterruptedRunnable implements Runnable {
1574	<	public void run() {
1575	<	try {
1576	<	Thread.sleep(MEDIUM_DELAY_MS);
1577	<	}
1578	<	catch(InterruptedException success) {
1579	<	}
1573	>	public void await(CountDownLatch latch) {
1574	>	await(latch, LONG_DELAY_MS);
1575	>	}
1576	>
1577	>	public void await(Semaphore semaphore) {
1578	>	boolean timedOut = false;
1579	>	try {
1580	>	timedOut = !semaphore.tryAcquire(LONG_DELAY_MS, MILLISECONDS);
1581	>	} catch (Throwable fail) {
1582	>	threadUnexpectedException(fail);
1583		}
1584	+	if (timedOut)
1585	+	fail("timed out waiting for Semaphore for "
1586	+	+ (LONG_DELAY_MS/1000) + " sec");
1587		}
1588
1589	<	class LongPossiblyInterruptedRunnable implements Runnable {
1590	<	public void run() {
1591	<	try {
1592	<	Thread.sleep(LONG_DELAY_MS);
1593	<	}
497	<	catch(InterruptedException success) {
498	<	}
1589	>	public void await(CyclicBarrier barrier) {
1590	>	try {
1591	>	barrier.await(LONG_DELAY_MS, MILLISECONDS);
1592	>	} catch (Throwable fail) {
1593	>	threadUnexpectedException(fail);
1594		}
1595		}
1596
1597	+	//     /**
1598	+	//      * Spin-waits up to LONG_DELAY_MS until flag becomes true.
1599	+	//      */
1600	+	//     public void await(AtomicBoolean flag) {
1601	+	//         await(flag, LONG_DELAY_MS);
1602	+	//     }
1603	+
1604	+	//     /**
1605	+	//      * Spin-waits up to the specified timeout until flag becomes true.
1606	+	//      */
1607	+	//     public void await(AtomicBoolean flag, long timeoutMillis) {
1608	+	//         long startTime = System.nanoTime();
1609	+	//         while (!flag.get()) {
1610	+	//             if (millisElapsedSince(startTime) > timeoutMillis)
1611	+	//                 throw new AssertionError("timed out");
1612	+	//             Thread.yield();
1613	+	//         }
1614	+	//     }
1615	+
1616	+	public static class NPETask implements Callable<String> {
1617	+	public String call() { throw new NullPointerException(); }
1618	+	}
1619	+
1620	+	public Runnable possiblyInterruptedRunnable(final long timeoutMillis) {
1621	+	return new CheckedRunnable() {
1622	+	protected void realRun() {
1623	+	try {
1624	+	delay(timeoutMillis);
1625	+	} catch (InterruptedException ok) {}
1626	+	}};
1627	+	}
1628	+
1629		/**
1630		* For use as ThreadFactory in constructors
1631		*/
1632	<	static class SimpleThreadFactory implements ThreadFactory{
1633	<	public Thread newThread(Runnable r){
1632	>	public static class SimpleThreadFactory implements ThreadFactory {
1633	>	public Thread newThread(Runnable r) {
1634		return new Thread(r);
1635	<	}
1635	>	}
1636	>	}
1637	>
1638	>	public interface TrackedRunnable extends Runnable {
1639	>	boolean isDone();
1640		}
1641
1642	<	static class TrackedShortRunnable implements Runnable {
1643	<	volatile boolean done = false;
1642	>	public static class TrackedNoOpRunnable implements Runnable {
1643	>	public volatile boolean done = false;
1644		public void run() {
1645	+	done = true;
1646	+	}
1647	+	}
1648	+
1649	+	/**
1650	+	* Analog of CheckedRunnable for RecursiveAction
1651	+	*/
1652	+	public abstract class CheckedRecursiveAction extends RecursiveAction {
1653	+	protected abstract void realCompute() throws Throwable;
1654	+
1655	+	@Override protected final void compute() {
1656		try {
1657	<	Thread.sleep(SMALL_DELAY_MS);
1658	<	done = true;
1659	<	} catch(Exception e){
1657	>	realCompute();
1658	>	} catch (Throwable fail) {
1659	>	threadUnexpectedException(fail);
1660		}
1661		}
1662		}
1663
1664	<	static class TrackedMediumRunnable implements Runnable {
1665	<	volatile boolean done = false;
1666	<	public void run() {
1664	>	/**
1665	>	* Analog of CheckedCallable for RecursiveTask
1666	>	*/
1667	>	public abstract class CheckedRecursiveTask<T> extends RecursiveTask<T> {
1668	>	protected abstract T realCompute() throws Throwable;
1669	>
1670	>	@Override protected final T compute() {
1671		try {
1672	<	Thread.sleep(MEDIUM_DELAY_MS);
1673	<	done = true;
1674	<	} catch(Exception e){
1672	>	return realCompute();
1673	>	} catch (Throwable fail) {
1674	>	threadUnexpectedException(fail);
1675		}
1676	+	throw new AssertionError("unreached");
1677		}
1678		}
1679
1680	<	static class TrackedLongRunnable implements Runnable {
1681	<	volatile boolean done = false;
1682	<	public void run() {
1680	>	/**
1681	>	* For use as RejectedExecutionHandler in constructors
1682	>	*/
1683	>	public static class NoOpREHandler implements RejectedExecutionHandler {
1684	>	public void rejectedExecution(Runnable r,
1685	>	ThreadPoolExecutor executor) {}
1686	>	}
1687	>
1688	>	/**
1689	>	* A CyclicBarrier that uses timed await and fails with
1690	>	* AssertionErrors instead of throwing checked exceptions.
1691	>	*/
1692	>	public static class CheckedBarrier extends CyclicBarrier {
1693	>	public CheckedBarrier(int parties) { super(parties); }
1694	>
1695	>	public int await() {
1696		try {
1697	<	Thread.sleep(LONG_DELAY_MS);
1698	<	done = true;
1699	<	} catch(Exception e){
1697	>	return super.await(2 * LONG_DELAY_MS, MILLISECONDS);
1698	>	} catch (TimeoutException timedOut) {
1699	>	throw new AssertionError("timed out");
1700	>	} catch (Exception fail) {
1701	>	throw new AssertionError("Unexpected exception: " + fail, fail);
1702		}
1703		}
1704		}
1705
1706	<	static class TrackedNoOpRunnable implements Runnable {
1707	<	volatile boolean done = false;
1708	<	public void run() {
1709	<	done = true;
1706	>	void checkEmpty(BlockingQueue q) {
1707	>	try {
1708	>	assertTrue(q.isEmpty());
1709	>	assertEquals(0, q.size());
1710	>	assertNull(q.peek());
1711	>	assertNull(q.poll());
1712	>	assertNull(q.poll(randomExpiredTimeout(), randomTimeUnit()));
1713	>	assertEquals(q.toString(), "[]");
1714	>	assertTrue(Arrays.equals(q.toArray(), new Object[0]));
1715	>	assertFalse(q.iterator().hasNext());
1716	>	try {
1717	>	q.element();
1718	>	shouldThrow();
1719	>	} catch (NoSuchElementException success) {}
1720	>	try {
1721	>	q.iterator().next();
1722	>	shouldThrow();
1723	>	} catch (NoSuchElementException success) {}
1724	>	try {
1725	>	q.remove();
1726	>	shouldThrow();
1727	>	} catch (NoSuchElementException success) {}
1728	>	} catch (InterruptedException fail) { threadUnexpectedException(fail); }
1729	>	}
1730	>
1731	>	void assertSerialEquals(Object x, Object y) {
1732	>	assertTrue(Arrays.equals(serialBytes(x), serialBytes(y)));
1733	>	}
1734	>
1735	>	void assertNotSerialEquals(Object x, Object y) {
1736	>	assertFalse(Arrays.equals(serialBytes(x), serialBytes(y)));
1737	>	}
1738	>
1739	>	byte[] serialBytes(Object o) {
1740	>	try {
1741	>	ByteArrayOutputStream bos = new ByteArrayOutputStream();
1742	>	ObjectOutputStream oos = new ObjectOutputStream(bos);
1743	>	oos.writeObject(o);
1744	>	oos.flush();
1745	>	oos.close();
1746	>	return bos.toByteArray();
1747	>	} catch (Throwable fail) {
1748	>	threadUnexpectedException(fail);
1749	>	return new byte[0];
1750		}
1751		}
1752
1753	<	static class TrackedCallable implements Callable {
1754	<	volatile boolean done = false;
1755	<	public Object call() {
1756	<	try {
1757	<	Thread.sleep(SMALL_DELAY_MS);
1758	<	done = true;
1759	<	} catch(Exception e){
1753	>	void assertImmutable(Object o) {
1754	>	if (o instanceof Collection) {
1755	>	assertThrows(
1756	>	UnsupportedOperationException.class,
1757	>	() -> ((Collection) o).add(null));
1758	>	}
1759	>	}
1760	>
1761	>	@SuppressWarnings("unchecked")
1762	>	<T> T serialClone(T o) {
1763	>	T clone = null;
1764	>	try {
1765	>	ObjectInputStream ois = new ObjectInputStream
1766	>	(new ByteArrayInputStream(serialBytes(o)));
1767	>	clone = (T) ois.readObject();
1768	>	} catch (Throwable fail) {
1769	>	threadUnexpectedException(fail);
1770	>	}
1771	>	if (o == clone) assertImmutable(o);
1772	>	else assertSame(o.getClass(), clone.getClass());
1773	>	return clone;
1774	>	}
1775	>
1776	>	/**
1777	>	* A version of serialClone that leaves error handling (for
1778	>	* e.g. NotSerializableException) up to the caller.
1779	>	*/
1780	>	@SuppressWarnings("unchecked")
1781	>	<T> T serialClonePossiblyFailing(T o)
1782	>	throws ReflectiveOperationException, java.io.IOException {
1783	>	ByteArrayOutputStream bos = new ByteArrayOutputStream();
1784	>	ObjectOutputStream oos = new ObjectOutputStream(bos);
1785	>	oos.writeObject(o);
1786	>	oos.flush();
1787	>	oos.close();
1788	>	ObjectInputStream ois = new ObjectInputStream
1789	>	(new ByteArrayInputStream(bos.toByteArray()));
1790	>	T clone = (T) ois.readObject();
1791	>	if (o == clone) assertImmutable(o);
1792	>	else assertSame(o.getClass(), clone.getClass());
1793	>	return clone;
1794	>	}
1795	>
1796	>	/**
1797	>	* If o implements Cloneable and has a public clone method,
1798	>	* returns a clone of o, else null.
1799	>	*/
1800	>	@SuppressWarnings("unchecked")
1801	>	<T> T cloneableClone(T o) {
1802	>	if (!(o instanceof Cloneable)) return null;
1803	>	final T clone;
1804	>	try {
1805	>	clone = (T) o.getClass().getMethod("clone").invoke(o);
1806	>	} catch (NoSuchMethodException ok) {
1807	>	return null;
1808	>	} catch (ReflectiveOperationException unexpected) {
1809	>	throw new Error(unexpected);
1810	>	}
1811	>	assertNotSame(o, clone); // not 100% guaranteed by spec
1812	>	assertSame(o.getClass(), clone.getClass());
1813	>	return clone;
1814	>	}
1815	>
1816	>	public void assertThrows(Class<? extends Throwable> expectedExceptionClass,
1817	>	Action... throwingActions) {
1818	>	for (Action throwingAction : throwingActions) {
1819	>	boolean threw = false;
1820	>	try { throwingAction.run(); }
1821	>	catch (Throwable t) {
1822	>	threw = true;
1823	>	if (!expectedExceptionClass.isInstance(t))
1824	>	throw new AssertionError(
1825	>	"Expected " + expectedExceptionClass.getName() +
1826	>	", got " + t.getClass().getName(),
1827	>	t);
1828		}
1829	<	return Boolean.TRUE;
1829	>	if (!threw)
1830	>	shouldThrow(expectedExceptionClass.getName());
1831		}
1832		}
1833
1834	+	public void assertIteratorExhausted(Iterator<?> it) {
1835	+	try {
1836	+	it.next();
1837	+	shouldThrow();
1838	+	} catch (NoSuchElementException success) {}
1839	+	assertFalse(it.hasNext());
1840	+	}
1841	+
1842	+	public <T> Callable<T> callableThrowing(final Exception ex) {
1843	+	return new Callable<T>() { public T call() throws Exception { throw ex; }};
1844	+	}
1845	+
1846	+	public Runnable runnableThrowing(final RuntimeException ex) {
1847	+	return new Runnable() { public void run() { throw ex; }};
1848	+	}
1849	+
1850	+	/** A reusable thread pool to be shared by tests. */
1851	+	static final ExecutorService cachedThreadPool =
1852	+	new ThreadPoolExecutor(0, Integer.MAX_VALUE,
1853	+	1000L, MILLISECONDS,
1854	+	new SynchronousQueue<Runnable>());
1855	+
1856	+	static <T> void shuffle(T[] array) {
1857	+	Collections.shuffle(Arrays.asList(array), ThreadLocalRandom.current());
1858	+	}
1859
1860		/**
1861	<	* For use as RejectedExecutionHandler in constructors
1861	>	* Returns the same String as would be returned by {@link
1862	>	* Object#toString}, whether or not the given object's class
1863	>	* overrides toString().
1864	>	*
1865	>	* @see System#identityHashCode
1866	>	*/
1867	>	static String identityString(Object x) {
1868	>	return x.getClass().getName()
1869	>	+ "@" + Integer.toHexString(System.identityHashCode(x));
1870	>	}
1871	>
1872	>	// --- Shared assertions for Executor tests ---
1873	>
1874	>	/**
1875	>	* Returns maximum number of tasks that can be submitted to given
1876	>	* pool (with bounded queue) before saturation (when submission
1877	>	* throws RejectedExecutionException).
1878	>	*/
1879	>	static final int saturatedSize(ThreadPoolExecutor pool) {
1880	>	BlockingQueue<Runnable> q = pool.getQueue();
1881	>	return pool.getMaximumPoolSize() + q.size() + q.remainingCapacity();
1882	>	}
1883	>
1884	>	@SuppressWarnings("FutureReturnValueIgnored")
1885	>	void assertNullTaskSubmissionThrowsNullPointerException(Executor e) {
1886	>	try {
1887	>	e.execute((Runnable) null);
1888	>	shouldThrow();
1889	>	} catch (NullPointerException success) {}
1890	>
1891	>	if (! (e instanceof ExecutorService)) return;
1892	>	ExecutorService es = (ExecutorService) e;
1893	>	try {
1894	>	es.submit((Runnable) null);
1895	>	shouldThrow();
1896	>	} catch (NullPointerException success) {}
1897	>	try {
1898	>	es.submit((Runnable) null, Boolean.TRUE);
1899	>	shouldThrow();
1900	>	} catch (NullPointerException success) {}
1901	>	try {
1902	>	es.submit((Callable) null);
1903	>	shouldThrow();
1904	>	} catch (NullPointerException success) {}
1905	>
1906	>	if (! (e instanceof ScheduledExecutorService)) return;
1907	>	ScheduledExecutorService ses = (ScheduledExecutorService) e;
1908	>	try {
1909	>	ses.schedule((Runnable) null,
1910	>	randomTimeout(), randomTimeUnit());
1911	>	shouldThrow();
1912	>	} catch (NullPointerException success) {}
1913	>	try {
1914	>	ses.schedule((Callable) null,
1915	>	randomTimeout(), randomTimeUnit());
1916	>	shouldThrow();
1917	>	} catch (NullPointerException success) {}
1918	>	try {
1919	>	ses.scheduleAtFixedRate((Runnable) null,
1920	>	randomTimeout(), LONG_DELAY_MS, MILLISECONDS);
1921	>	shouldThrow();
1922	>	} catch (NullPointerException success) {}
1923	>	try {
1924	>	ses.scheduleWithFixedDelay((Runnable) null,
1925	>	randomTimeout(), LONG_DELAY_MS, MILLISECONDS);
1926	>	shouldThrow();
1927	>	} catch (NullPointerException success) {}
1928	>	}
1929	>
1930	>	void setRejectedExecutionHandler(
1931	>	ThreadPoolExecutor p, RejectedExecutionHandler handler) {
1932	>	p.setRejectedExecutionHandler(handler);
1933	>	assertSame(handler, p.getRejectedExecutionHandler());
1934	>	}
1935	>
1936	>	void assertTaskSubmissionsAreRejected(ThreadPoolExecutor p) {
1937	>	final RejectedExecutionHandler savedHandler = p.getRejectedExecutionHandler();
1938	>	final long savedTaskCount = p.getTaskCount();
1939	>	final long savedCompletedTaskCount = p.getCompletedTaskCount();
1940	>	final int savedQueueSize = p.getQueue().size();
1941	>	final boolean stock = (p.getClass().getClassLoader() == null);
1942	>
1943	>	Runnable r = () -> {};
1944	>	Callable<Boolean> c = () -> Boolean.TRUE;
1945	>
1946	>	class Recorder implements RejectedExecutionHandler {
1947	>	public volatile Runnable r = null;
1948	>	public volatile ThreadPoolExecutor p = null;
1949	>	public void reset() { r = null; p = null; }
1950	>	public void rejectedExecution(Runnable r, ThreadPoolExecutor p) {
1951	>	assertNull(this.r);
1952	>	assertNull(this.p);
1953	>	this.r = r;
1954	>	this.p = p;
1955	>	}
1956	>	}
1957	>
1958	>	// check custom handler is invoked exactly once per task
1959	>	Recorder recorder = new Recorder();
1960	>	setRejectedExecutionHandler(p, recorder);
1961	>	for (int i = 2; i--> 0; ) {
1962	>	recorder.reset();
1963	>	p.execute(r);
1964	>	if (stock && p.getClass() == ThreadPoolExecutor.class)
1965	>	assertSame(r, recorder.r);
1966	>	assertSame(p, recorder.p);
1967	>
1968	>	recorder.reset();
1969	>	assertFalse(p.submit(r).isDone());
1970	>	if (stock) assertTrue(!((FutureTask) recorder.r).isDone());
1971	>	assertSame(p, recorder.p);
1972	>
1973	>	recorder.reset();
1974	>	assertFalse(p.submit(r, Boolean.TRUE).isDone());
1975	>	if (stock) assertTrue(!((FutureTask) recorder.r).isDone());
1976	>	assertSame(p, recorder.p);
1977	>
1978	>	recorder.reset();
1979	>	assertFalse(p.submit(c).isDone());
1980	>	if (stock) assertTrue(!((FutureTask) recorder.r).isDone());
1981	>	assertSame(p, recorder.p);
1982	>
1983	>	if (p instanceof ScheduledExecutorService) {
1984	>	ScheduledExecutorService s = (ScheduledExecutorService) p;
1985	>	ScheduledFuture<?> future;
1986	>
1987	>	recorder.reset();
1988	>	future = s.schedule(r, randomTimeout(), randomTimeUnit());
1989	>	assertFalse(future.isDone());
1990	>	if (stock) assertTrue(!((FutureTask) recorder.r).isDone());
1991	>	assertSame(p, recorder.p);
1992	>
1993	>	recorder.reset();
1994	>	future = s.schedule(c, randomTimeout(), randomTimeUnit());
1995	>	assertFalse(future.isDone());
1996	>	if (stock) assertTrue(!((FutureTask) recorder.r).isDone());
1997	>	assertSame(p, recorder.p);
1998	>
1999	>	recorder.reset();
2000	>	future = s.scheduleAtFixedRate(r, randomTimeout(), LONG_DELAY_MS, MILLISECONDS);
2001	>	assertFalse(future.isDone());
2002	>	if (stock) assertTrue(!((FutureTask) recorder.r).isDone());
2003	>	assertSame(p, recorder.p);
2004	>
2005	>	recorder.reset();
2006	>	future = s.scheduleWithFixedDelay(r, randomTimeout(), LONG_DELAY_MS, MILLISECONDS);
2007	>	assertFalse(future.isDone());
2008	>	if (stock) assertTrue(!((FutureTask) recorder.r).isDone());
2009	>	assertSame(p, recorder.p);
2010	>	}
2011	>	}
2012	>
2013	>	// Checking our custom handler above should be sufficient, but
2014	>	// we add some integration tests of standard handlers.
2015	>	final AtomicReference<Thread> thread = new AtomicReference<>();
2016	>	final Runnable setThread = () -> thread.set(Thread.currentThread());
2017	>
2018	>	setRejectedExecutionHandler(p, new ThreadPoolExecutor.AbortPolicy());
2019	>	try {
2020	>	p.execute(setThread);
2021	>	shouldThrow();
2022	>	} catch (RejectedExecutionException success) {}
2023	>	assertNull(thread.get());
2024	>
2025	>	setRejectedExecutionHandler(p, new ThreadPoolExecutor.DiscardPolicy());
2026	>	p.execute(setThread);
2027	>	assertNull(thread.get());
2028	>
2029	>	setRejectedExecutionHandler(p, new ThreadPoolExecutor.CallerRunsPolicy());
2030	>	p.execute(setThread);
2031	>	if (p.isShutdown())
2032	>	assertNull(thread.get());
2033	>	else
2034	>	assertSame(Thread.currentThread(), thread.get());
2035	>
2036	>	setRejectedExecutionHandler(p, savedHandler);
2037	>
2038	>	// check that pool was not perturbed by handlers
2039	>	assertEquals(savedTaskCount, p.getTaskCount());
2040	>	assertEquals(savedCompletedTaskCount, p.getCompletedTaskCount());
2041	>	assertEquals(savedQueueSize, p.getQueue().size());
2042	>	}
2043	>
2044	>	void assertCollectionsEquals(Collection<?> x, Collection<?> y) {
2045	>	assertEquals(x, y);
2046	>	assertEquals(y, x);
2047	>	assertEquals(x.isEmpty(), y.isEmpty());
2048	>	assertEquals(x.size(), y.size());
2049	>	if (x instanceof List) {
2050	>	assertEquals(x.toString(), y.toString());
2051	>	}
2052	>	if (x instanceof List || x instanceof Set) {
2053	>	assertEquals(x.hashCode(), y.hashCode());
2054	>	}
2055	>	if (x instanceof List || x instanceof Deque) {
2056	>	assertTrue(Arrays.equals(x.toArray(), y.toArray()));
2057	>	assertTrue(Arrays.equals(x.toArray(new Object[0]),
2058	>	y.toArray(new Object[0])));
2059	>	}
2060	>	}
2061	>
2062	>	/**
2063	>	* A weaker form of assertCollectionsEquals which does not insist
2064	>	* that the two collections satisfy Object#equals(Object), since
2065	>	* they may use identity semantics as Deques do.
2066		*/
2067	<	static class NoOpREHandler implements RejectedExecutionHandler{
2068	<	public void rejectedExecution(Runnable r, ThreadPoolExecutor executor){}
2067	>	void assertCollectionsEquivalent(Collection<?> x, Collection<?> y) {
2068	>	if (x instanceof List || x instanceof Set)
2069	>	assertCollectionsEquals(x, y);
2070	>	else {
2071	>	assertEquals(x.isEmpty(), y.isEmpty());
2072	>	assertEquals(x.size(), y.size());
2073	>	assertEquals(new HashSet(x), new HashSet(y));
2074	>	if (x instanceof Deque) {
2075	>	assertTrue(Arrays.equals(x.toArray(), y.toArray()));
2076	>	assertTrue(Arrays.equals(x.toArray(new Object[0]),
2077	>	y.toArray(new Object[0])));
2078	>	}
2079	>	}
2080		}
570	–
571	–
2081		}

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