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

Comparing jsr166/src/test/tck/JSR166TestCase.java (file contents):
Revision 1.21 by dl, Fri Jan 16 16:49:40 2004 UTC vs.
Revision 1.274 by dl, Tue Mar 22 16:26:19 2022 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.LockInfo;
53	>	import java.lang.management.ThreadInfo;
54	>	import java.lang.management.ThreadMXBean;
55	>	import java.lang.reflect.Constructor;
56	>	import java.lang.reflect.Method;
57	>	import java.lang.reflect.Modifier;
58	>	import java.security.CodeSource;
59	>	import java.security.Permission;
60	>	import java.security.PermissionCollection;
61	>	import java.security.Permissions;
62	>	import java.security.Policy;
63	>	import java.security.ProtectionDomain;
64	>	import java.security.SecurityPermission;
65	>	import java.util.ArrayList;
66	>	import java.util.Arrays;
67	>	import java.util.Collection;
68	>	import java.util.Collections;
69	>	import java.util.Date;
70	>	import java.util.Deque;
71	>	import java.util.Enumeration;
72	>	import java.util.HashSet;
73	>	import java.util.Iterator;
74	>	import java.util.List;
75	>	import java.util.NoSuchElementException;
76	>	import java.util.PropertyPermission;
77	>	import java.util.Queue;
78	>	import java.util.Set;
79	>	import java.util.concurrent.BlockingQueue;
80	>	import java.util.concurrent.Callable;
81	>	import java.util.concurrent.CountDownLatch;
82	>	import java.util.concurrent.CyclicBarrier;
83	>	import java.util.concurrent.ExecutionException;
84	>	import java.util.concurrent.Executor;
85	>	import java.util.concurrent.Executors;
86	>	import java.util.concurrent.ExecutorService;
87	>	import java.util.concurrent.ForkJoinPool;
88	>	import java.util.concurrent.Future;
89	>	import java.util.concurrent.FutureTask;
90	>	import java.util.concurrent.RecursiveAction;
91	>	import java.util.concurrent.RecursiveTask;
92	>	import java.util.concurrent.RejectedExecutionException;
93	>	import java.util.concurrent.RejectedExecutionHandler;
94	>	import java.util.concurrent.Semaphore;
95	>	import java.util.concurrent.ScheduledExecutorService;
96	>	import java.util.concurrent.ScheduledFuture;
97	>	import java.util.concurrent.SynchronousQueue;
98	>	import java.util.concurrent.ThreadFactory;
99	>	import java.util.concurrent.ThreadLocalRandom;
100	>	import java.util.concurrent.ThreadPoolExecutor;
101	>	import java.util.concurrent.TimeUnit;
102	>	import java.util.concurrent.TimeoutException;
103	>	import java.util.concurrent.atomic.AtomicBoolean;
104	>	import java.util.concurrent.atomic.AtomicReference;
105	>	import java.util.regex.Pattern;
106	>
107	>	import junit.framework.Test;
108	>	import junit.framework.TestCase;
109	>	import junit.framework.TestResult;
110	>	import junit.framework.TestSuite;
111
112		/**
113		* Base class for JSR166 Junit TCK tests.  Defines some constants,
114		* utility methods and classes, as well as a simple framework for
115		* helping to make sure that assertions failing in generated threads
116		* cause the associated test that generated them to itself fail (which
117	<	* JUnit doe not otherwise arrange).  The rules for creating such
117	>	* JUnit does not otherwise arrange).  The rules for creating such
118		* tests are:
119		*
120		* <ol>
121		*
122	<	* <li> All assertions in code running in generated threads must use
123	<	* the forms {@link #threadFail} , {@link #threadAssertTrue} {@link
124	<	* #threadAssertEquals}, or {@link #threadAssertNull}, (not
125	<	* <tt>fail</tt>, <tt>assertTrue</tt>, etc.) It is OK (but not
126	<	* particularly recommended) for other code to use these forms too.
127	<	* Only the most typically used JUnit assertion methods are defined
128	<	* this way, but enough to live with.</li>
122	>	* <li>All code not running in the main test thread (manually spawned threads
123	>	* or the common fork join pool) must be checked for failure (and completion!).
124	>	* Mechanisms that can be used to ensure this are:
125	>	*   <ol>
126	>	*   <li>Signalling via a synchronizer like AtomicInteger or CountDownLatch
127	>	*    that the task completed normally, which is checked before returning from
128	>	*    the test method in the main thread.
129	>	*   <li>Using the forms {@link #threadFail}, {@link #threadAssertTrue},
130	>	*    or {@link #threadAssertNull}, (not {@code fail}, {@code assertTrue}, etc.)
131	>	*    Only the most typically used JUnit assertion methods are defined
132	>	*    this way, but enough to live with.
133	>	*   <li>Recording failure explicitly using {@link #threadUnexpectedException}
134	>	*    or {@link #threadRecordFailure}.
135	>	*   <li>Using a wrapper like CheckedRunnable that uses one the mechanisms above.
136	>	*   </ol>
137		*
138	<	* <li> If you override {@link #setUp} or {@link #tearDown}, make sure
139	<	* to invoke <tt>super.setUp</tt> and <tt>super.tearDown</tt> within
138	>	* <li>If you override {@link #setUp} or {@link #tearDown}, make sure
139	>	* to invoke {@code super.setUp} and {@code super.tearDown} within
140		* them. These methods are used to clear and check for thread
141	<	* assertion failures.</li>
141	>	* assertion failures.
142		*
143	<	* <li>All delays and timeouts must use one of the constants <tt>
144	<	* SHORT_DELAY_MS</tt>, <tt> SMALL_DELAY_MS</tt>, <tt> MEDIUM_DELAY_MS</tt>,
145	<	* <tt> LONG_DELAY_MS</tt>. The idea here is that a SHORT is always
143	>	* <li>All delays and timeouts must use one of the constants {@code
144	>	* SHORT_DELAY_MS}, {@code SMALL_DELAY_MS}, {@code MEDIUM_DELAY_MS},
145	>	* {@code LONG_DELAY_MS}. The idea here is that a SHORT is always
146		* discriminable from zero time, and always allows enough time for the
147		* small amounts of computation (creating a thread, calling a few
148		* methods, etc) needed to reach a timeout point. Similarly, a SMALL
149		* is always discriminable as larger than SHORT and smaller than
150		* MEDIUM.  And so on. These constants are set to conservative values,
151		* but even so, if there is ever any doubt, they can all be increased
152	<	* in one spot to rerun tests on slower platforms</li>
152	>	* in one spot to rerun tests on slower platforms.
153	>	*
154	>	* Class Item is used for elements of collections and related
155	>	* purposes. Many tests rely on their keys being equal to ints. To
156	>	* check these, methods mustEqual, mustContain, etc adapt the JUnit
157	>	* assert methods to intercept ints.
158		*
159	<	* <li> All threads generated must be joined inside each test case
160	<	* method (or <tt>fail</tt> to do so) before returning from the
161	<	* method. The <tt> joinPool</tt> method can be used to do this when
162	<	* using Executors.</li>
159	>	* <li>All threads generated must be joined inside each test case
160	>	* method (or {@code fail} to do so) before returning from the
161	>	* method. The {@code joinPool} method can be used to do this when
162	>	* using Executors.
163		*
164		* </ol>
165		*
166	<	* <p> <b>Other notes</b>
166	>	* <p><b>Other notes</b>
167		* <ul>
168		*
169	<	* <li> Usually, there is one testcase method per JSR166 method
169	>	* <li>Usually, there is one testcase method per JSR166 method
170		* covering "normal" operation, and then as many exception-testing
171		* methods as there are exceptions the method can throw. Sometimes
172		* there are multiple tests per JSR166 method when the different
173		* "normal" behaviors differ significantly. And sometimes testcases
174	<	* cover multiple methods when they cannot be tested in
175	<	* isolation.</li>
176	<	*
67	<	* <li> The documentation style for testcases is to provide as javadoc
174	>	* cover multiple methods when they cannot be tested in isolation.
175	>	*
176	>	* <li>The documentation style for testcases is to provide as javadoc
177		* a simple sentence or two describing the property that the testcase
178		* method purports to test. The javadocs do not say anything about how
179	<	* the property is tested. To find out, read the code.</li>
179	>	* the property is tested. To find out, read the code.
180		*
181	<	* <li> These tests are "conformance tests", and do not attempt to
181	>	* <li>These tests are "conformance tests", and do not attempt to
182		* test throughput, latency, scalability or other performance factors
183		* (see the separate "jtreg" tests for a set intended to check these
184		* for the most central aspects of functionality.) So, most tests use
185		* the smallest sensible numbers of threads, collection sizes, etc
186	<	* needed to check basic conformance.</li>
186	>	* needed to check basic conformance.
187		*
188		* <li>The test classes currently do not declare inclusion in
189		* any particular package to simplify things for people integrating
190	<	* them in TCK test suites.</li>
190	>	* them in TCK test suites.
191		*
192	<	* <li> As a convenience, the <tt>main</tt> of this class (JSR166TestCase)
193	<	* runs all JSR166 unit tests.</li>
192	>	* <li>As a convenience, the {@code main} of this class (JSR166TestCase)
193	>	* runs all JSR166 unit tests.
194		*
195		* </ul>
196		*/
197		public class JSR166TestCase extends TestCase {
198	+	// No longer run with custom securityManagers
199	+	private static final boolean useSecurityManager =
200	+	Boolean.getBoolean("jsr166.useSecurityManager");
201	+
202	+	protected static final boolean expensiveTests =
203	+	Boolean.getBoolean("jsr166.expensiveTests");
204	+
205	+	/**
206	+	* If true, also run tests that are not part of the official tck
207	+	* because they test unspecified implementation details.
208	+	*/
209	+	protected static final boolean testImplementationDetails =
210	+	Boolean.getBoolean("jsr166.testImplementationDetails");
211	+
212	+	/**
213	+	* If true, report on stdout all "slow" tests, that is, ones that
214	+	* take more than profileThreshold milliseconds to execute.
215	+	*/
216	+	private static final boolean profileTests =
217	+	Boolean.getBoolean("jsr166.profileTests");
218	+
219	+	/**
220	+	* The number of milliseconds that tests are permitted for
221	+	* execution without being reported, when profileTests is set.
222	+	*/
223	+	private static final long profileThreshold =
224	+	Long.getLong("jsr166.profileThreshold", 100);
225	+
226	+	/**
227	+	* The number of repetitions per test (for tickling rare bugs).
228	+	*/
229	+	private static final int runsPerTest =
230	+	Integer.getInteger("jsr166.runsPerTest", 1);
231	+
232	+	/**
233	+	* The number of repetitions of the test suite (for finding leaks?).
234	+	*/
235	+	private static final int suiteRuns =
236	+	Integer.getInteger("jsr166.suiteRuns", 1);
237	+
238	+	/**
239	+	* Returns the value of the system property, or NaN if not defined.
240	+	*/
241	+	private static float systemPropertyValue(String name) {
242	+	String floatString = System.getProperty(name);
243	+	if (floatString == null)
244	+	return Float.NaN;
245	+	try {
246	+	return Float.parseFloat(floatString);
247	+	} catch (NumberFormatException ex) {
248	+	throw new IllegalArgumentException(
249	+	String.format("Bad float value in system property %s=%s",
250	+	name, floatString));
251	+	}
252	+	}
253	+
254	+	private static final ThreadMXBean THREAD_MXBEAN
255	+	= ManagementFactory.getThreadMXBean();
256	+
257	+	/**
258	+	* The scaling factor to apply to standard delays used in tests.
259	+	* May be initialized from any of:
260	+	* - the "jsr166.delay.factor" system property
261	+	* - the "test.timeout.factor" system property (as used by jtreg)
262	+	*   See: http://openjdk.java.net/jtreg/tag-spec.html
263	+	* - hard-coded fuzz factor when using a known slowpoke VM
264	+	*/
265	+	private static final float delayFactor = delayFactor();
266	+
267	+	private static float delayFactor() {
268	+	float x;
269	+	if (!Float.isNaN(x = systemPropertyValue("jsr166.delay.factor")))
270	+	return x;
271	+	if (!Float.isNaN(x = systemPropertyValue("test.timeout.factor")))
272	+	return x;
273	+	String prop = System.getProperty("java.vm.version");
274	+	if (prop != null && prop.matches(".*debug.*"))
275	+	return 4.0f; // How much slower is fastdebug than product?!
276	+	return 1.0f;
277	+	}
278	+
279	+	public JSR166TestCase() { super(); }
280	+	public JSR166TestCase(String name) { super(name); }
281	+
282	+	/**
283	+	* A filter for tests to run, matching strings of the form
284	+	* methodName(className), e.g. "testInvokeAll5(ForkJoinPoolTest)"
285	+	* Usefully combined with jsr166.runsPerTest.
286	+	*/
287	+	private static final Pattern methodFilter = methodFilter();
288	+
289	+	private static Pattern methodFilter() {
290	+	String regex = System.getProperty("jsr166.methodFilter");
291	+	return (regex == null) ? null : Pattern.compile(regex);
292	+	}
293	+
294	+	// Instrumentation to debug very rare, but very annoying hung test runs.
295	+	static volatile TestCase currentTestCase;
296	+	// static volatile int currentRun = 0;
297	+	static {
298	+	Runnable wedgedTestDetector = new Runnable() { public void run() {
299	+	// Avoid spurious reports with enormous runsPerTest.
300	+	// A single test case run should never take more than 1 second.
301	+	// But let's cap it at the high end too ...
302	+	final int timeoutMinutesMin = Math.max(runsPerTest / 60, 1)
303	+	* Math.max((int) delayFactor, 1);
304	+	final int timeoutMinutes = Math.min(15, timeoutMinutesMin);
305	+	for (TestCase lastTestCase = currentTestCase;;) {
306	+	try { MINUTES.sleep(timeoutMinutes); }
307	+	catch (InterruptedException unexpected) { break; }
308	+	if (lastTestCase == currentTestCase) {
309	+	System.err.printf(
310	+	"Looks like we're stuck running test: %s%n",
311	+	lastTestCase);
312	+	//                     System.err.printf(
313	+	//                         "Looks like we're stuck running test: %s (%d/%d)%n",
314	+	//                         lastTestCase, currentRun, runsPerTest);
315	+	//                     System.err.println("availableProcessors=" +
316	+	//                         Runtime.getRuntime().availableProcessors());
317	+	//                     System.err.printf("cpu model = %s%n", cpuModel());
318	+	dumpTestThreads();
319	+	// one stack dump is probably enough; more would be spam
320	+	break;
321	+	}
322	+	lastTestCase = currentTestCase;
323	+	}}};
324	+	Thread thread = new Thread(wedgedTestDetector, "WedgedTestDetector");
325	+	thread.setDaemon(true);
326	+	thread.start();
327	+	}
328	+
329	+	//     public static String cpuModel() {
330	+	//         try {
331	+	//             java.util.regex.Matcher matcher
332	+	//               = Pattern.compile("model name\\s*: (.*)")
333	+	//                 .matcher(new String(
334	+	//                     java.nio.file.Files.readAllBytes(
335	+	//                         java.nio.file.Paths.get("/proc/cpuinfo")), "UTF-8"));
336	+	//             matcher.find();
337	+	//             return matcher.group(1);
338	+	//         } catch (Exception ex) { return null; }
339	+	//     }
340	+
341	+	public void runBare() throws Throwable {
342	+	currentTestCase = this;
343	+	if (methodFilter == null
344	+	|| methodFilter.matcher(toString()).find())
345	+	super.runBare();
346	+	}
347	+
348	+	protected void runTest() throws Throwable {
349	+	for (int i = 0; i < runsPerTest; i++) {
350	+	// currentRun = i;
351	+	if (profileTests)
352	+	runTestProfiled();
353	+	else
354	+	super.runTest();
355	+	}
356	+	}
357	+
358	+	protected void runTestProfiled() throws Throwable {
359	+	for (int i = 0; i < 2; i++) {
360	+	long startTime = System.nanoTime();
361	+	super.runTest();
362	+	long elapsedMillis = millisElapsedSince(startTime);
363	+	if (elapsedMillis < profileThreshold)
364	+	break;
365	+	// Never report first run of any test; treat it as a
366	+	// warmup run, notably to trigger all needed classloading,
367	+	if (i > 0)
368	+	System.out.printf("%s: %d%n", toString(), elapsedMillis);
369	+	}
370	+	}
371	+
372	+	/**
373	+	* Runs all JSR166 unit tests using junit.textui.TestRunner.
374	+	*/
375	+	public static void main(String[] args) {
376	+	main(suite(), args);
377	+	}
378	+
379	+	static class PithyResultPrinter extends junit.textui.ResultPrinter {
380	+	PithyResultPrinter(java.io.PrintStream writer) { super(writer); }
381	+	long runTime;
382	+	public void startTest(Test test) {}
383	+	protected void printHeader(long runTime) {
384	+	this.runTime = runTime; // defer printing for later
385	+	}
386	+	protected void printFooter(TestResult result) {
387	+	if (result.wasSuccessful()) {
388	+	getWriter().println("OK (" + result.runCount() + " tests)"
389	+	+ "  Time: " + elapsedTimeAsString(runTime));
390	+	} else {
391	+	getWriter().println("Time: " + elapsedTimeAsString(runTime));
392	+	super.printFooter(result);
393	+	}
394	+	}
395	+	}
396	+
397	+	/**
398	+	* Returns a TestRunner that doesn't bother with unnecessary
399	+	* fluff, like printing a "." for each test case.
400	+	*/
401	+	static junit.textui.TestRunner newPithyTestRunner() {
402	+	junit.textui.TestRunner runner = new junit.textui.TestRunner();
403	+	runner.setPrinter(new PithyResultPrinter(System.out));
404	+	return runner;
405	+	}
406	+
407		/**
408	<	* Runs all JSR166 unit tests using junit.textui.TestRunner
409	<	*/
410	<	public static void main (String[] args) {
411	<	int iters = 1;
412	<	if (args.length > 0)
413	<	iters = Integer.parseInt(args[0]);
414	<	Test s = suite();
415	<	for (int i = 0; i < iters; ++i)
416	<	junit.textui.TestRunner.run (s);
408	>	* Runs all unit tests in the given test suite.
409	>	* Actual behavior influenced by jsr166.* system properties.
410	>	*/
411	>	@SuppressWarnings("removal")
412	>	static void main(Test suite, String[] args) {
413	>	if (useSecurityManager) {
414	>	System.err.println("Setting a permissive security manager");
415	>	Policy.setPolicy(permissivePolicy());
416	>	System.setSecurityManager(new SecurityManager());
417	>	}
418	>	for (int i = 0; i < suiteRuns; i++) {
419	>	TestResult result = newPithyTestRunner().doRun(suite);
420	>	if (!result.wasSuccessful())
421	>	System.exit(1);
422	>	System.gc();
423	>	System.runFinalization();
424	>	}
425	>	}
426	>
427	>	public static TestSuite newTestSuite(Object... suiteOrClasses) {
428	>	TestSuite suite = new TestSuite();
429	>	for (Object suiteOrClass : suiteOrClasses) {
430	>	if (suiteOrClass instanceof TestSuite)
431	>	suite.addTest((TestSuite) suiteOrClass);
432	>	else if (suiteOrClass instanceof Class)
433	>	suite.addTest(new TestSuite((Class<?>) suiteOrClass));
434	>	else
435	>	throw new ClassCastException("not a test suite or class");
436	>	}
437	>	return suite;
438	>	}
439	>
440	>	public static void addNamedTestClasses(TestSuite suite,
441	>	String... testClassNames) {
442	>	for (String testClassName : testClassNames) {
443	>	try {
444	>	Class<?> testClass = Class.forName(testClassName);
445	>	Method m = testClass.getDeclaredMethod("suite");
446	>	suite.addTest(newTestSuite((Test)m.invoke(null)));
447	>	} catch (ReflectiveOperationException e) {
448	>	throw new AssertionError("Missing test class", e);
449	>	}
450	>	}
451	>	}
452	>
453	>	public static final double JAVA_CLASS_VERSION;
454	>	public static final String JAVA_SPECIFICATION_VERSION;
455	>	static {
456	>	try {
457	>	@SuppressWarnings("removal") double jcv =
458	>	java.security.AccessController.doPrivileged(
459	>	new java.security.PrivilegedAction<Double>() {
460	>	public Double run() {
461	>	return Double.valueOf(System.getProperty("java.class.version"));}});
462	>	JAVA_CLASS_VERSION = jcv;
463	>	@SuppressWarnings("removal") String jsv =
464	>	java.security.AccessController.doPrivileged(
465	>	new java.security.PrivilegedAction<String>() {
466	>	public String run() {
467	>	return System.getProperty("java.specification.version");}});
468	>	JAVA_SPECIFICATION_VERSION = jsv;
469	>	} catch (Throwable t) {
470	>	throw new Error(t);
471	>	}
472		}
473
474	+	public static boolean atLeastJava6()  { return JAVA_CLASS_VERSION >= 50.0; }
475	+	public static boolean atLeastJava7()  { return JAVA_CLASS_VERSION >= 51.0; }
476	+	public static boolean atLeastJava8()  { return JAVA_CLASS_VERSION >= 52.0; }
477	+	public static boolean atLeastJava9()  { return JAVA_CLASS_VERSION >= 53.0; }
478	+	public static boolean atLeastJava10() { return JAVA_CLASS_VERSION >= 54.0; }
479	+	public static boolean atLeastJava11() { return JAVA_CLASS_VERSION >= 55.0; }
480	+	public static boolean atLeastJava12() { return JAVA_CLASS_VERSION >= 56.0; }
481	+	public static boolean atLeastJava13() { return JAVA_CLASS_VERSION >= 57.0; }
482	+	public static boolean atLeastJava14() { return JAVA_CLASS_VERSION >= 58.0; }
483	+	public static boolean atLeastJava15() { return JAVA_CLASS_VERSION >= 59.0; }
484	+	public static boolean atLeastJava16() { return JAVA_CLASS_VERSION >= 60.0; }
485	+	public static boolean atLeastJava17() { return JAVA_CLASS_VERSION >= 61.0; }
486	+
487		/**
488	<	* Collects all JSR166 unit tests as one suite
489	<	*/
490	<	public static Test suite ( ) {
491	<	TestSuite suite = new TestSuite("JSR166 Unit Tests");
492	<
493	<	suite.addTest(new TestSuite(AbstractExecutorServiceTest.class));
494	<	suite.addTest(new TestSuite(AbstractQueueTest.class));
495	<	suite.addTest(new TestSuite(AbstractQueuedSynchronizerTest.class));
496	<	suite.addTest(new TestSuite(ArrayBlockingQueueTest.class));
497	<	suite.addTest(new TestSuite(AtomicBooleanTest.class));
498	<	suite.addTest(new TestSuite(AtomicIntegerArrayTest.class));
499	<	suite.addTest(new TestSuite(AtomicIntegerFieldUpdaterTest.class));
500	<	suite.addTest(new TestSuite(AtomicIntegerTest.class));
501	<	suite.addTest(new TestSuite(AtomicLongArrayTest.class));
502	<	suite.addTest(new TestSuite(AtomicLongFieldUpdaterTest.class));
503	<	suite.addTest(new TestSuite(AtomicLongTest.class));
504	<	suite.addTest(new TestSuite(AtomicMarkableReferenceTest.class));
505	<	suite.addTest(new TestSuite(AtomicReferenceArrayTest.class));
506	<	suite.addTest(new TestSuite(AtomicReferenceFieldUpdaterTest.class));
507	<	suite.addTest(new TestSuite(AtomicReferenceTest.class));
508	<	suite.addTest(new TestSuite(AtomicStampedReferenceTest.class));
509	<	suite.addTest(new TestSuite(ConcurrentHashMapTest.class));
510	<	suite.addTest(new TestSuite(ConcurrentLinkedQueueTest.class));
511	<	suite.addTest(new TestSuite(CopyOnWriteArrayListTest.class));
512	<	suite.addTest(new TestSuite(CopyOnWriteArraySetTest.class));
513	<	suite.addTest(new TestSuite(CountDownLatchTest.class));
514	<	suite.addTest(new TestSuite(CyclicBarrierTest.class));
515	<	suite.addTest(new TestSuite(DelayQueueTest.class));
516	<	suite.addTest(new TestSuite(ExchangerTest.class));
517	<	suite.addTest(new TestSuite(ExecutorsTest.class));
518	<	suite.addTest(new TestSuite(ExecutorCompletionServiceTest.class));
519	<	suite.addTest(new TestSuite(FutureTaskTest.class));
520	<	suite.addTest(new TestSuite(LinkedBlockingQueueTest.class));
521	<	suite.addTest(new TestSuite(LinkedListTest.class));
522	<	suite.addTest(new TestSuite(LockSupportTest.class));
523	<	suite.addTest(new TestSuite(PriorityBlockingQueueTest.class));
524	<	suite.addTest(new TestSuite(PriorityQueueTest.class));
525	<	suite.addTest(new TestSuite(ReentrantLockTest.class));
526	<	suite.addTest(new TestSuite(ReentrantReadWriteLockTest.class));
527	<	suite.addTest(new TestSuite(ScheduledExecutorTest.class));
528	<	suite.addTest(new TestSuite(SemaphoreTest.class));
529	<	suite.addTest(new TestSuite(SynchronousQueueTest.class));
530	<	suite.addTest(new TestSuite(SystemTest.class));
531	<	suite.addTest(new TestSuite(ThreadLocalTest.class));
532	<	suite.addTest(new TestSuite(ThreadPoolExecutorTest.class));
533	<	suite.addTest(new TestSuite(ThreadTest.class));
534	<	suite.addTest(new TestSuite(TimeUnitTest.class));
535	<
488	>	* Collects all JSR166 unit tests as one suite.
489	>	*/
490	>	public static Test suite() {
491	>	// Java7+ test classes
492	>	TestSuite suite = newTestSuite(
493	>	ForkJoinPoolTest.suite(),
494	>	ForkJoinTaskTest.suite(),
495	>	RecursiveActionTest.suite(),
496	>	RecursiveTaskTest.suite(),
497	>	LinkedTransferQueueTest.suite(),
498	>	PhaserTest.suite(),
499	>	ThreadLocalRandomTest.suite(),
500	>	AbstractExecutorServiceTest.suite(),
501	>	AbstractQueueTest.suite(),
502	>	AbstractQueuedSynchronizerTest.suite(),
503	>	AbstractQueuedLongSynchronizerTest.suite(),
504	>	ArrayBlockingQueueTest.suite(),
505	>	ArrayDequeTest.suite(),
506	>	ArrayListTest.suite(),
507	>	AtomicBooleanTest.suite(),
508	>	AtomicIntegerArrayTest.suite(),
509	>	AtomicIntegerFieldUpdaterTest.suite(),
510	>	AtomicIntegerTest.suite(),
511	>	AtomicLongArrayTest.suite(),
512	>	AtomicLongFieldUpdaterTest.suite(),
513	>	AtomicLongTest.suite(),
514	>	AtomicMarkableReferenceTest.suite(),
515	>	AtomicReferenceArrayTest.suite(),
516	>	AtomicReferenceFieldUpdaterTest.suite(),
517	>	AtomicReferenceTest.suite(),
518	>	AtomicStampedReferenceTest.suite(),
519	>	ConcurrentHashMapTest.suite(),
520	>	ConcurrentLinkedDequeTest.suite(),
521	>	ConcurrentLinkedQueueTest.suite(),
522	>	ConcurrentSkipListMapTest.suite(),
523	>	ConcurrentSkipListSubMapTest.suite(),
524	>	ConcurrentSkipListSetTest.suite(),
525	>	ConcurrentSkipListSubSetTest.suite(),
526	>	CopyOnWriteArrayListTest.suite(),
527	>	CopyOnWriteArraySetTest.suite(),
528	>	CountDownLatchTest.suite(),
529	>	CountedCompleterTest.suite(),
530	>	CyclicBarrierTest.suite(),
531	>	DelayQueueTest.suite(),
532	>	EntryTest.suite(),
533	>	ExchangerTest.suite(),
534	>	ExecutorsTest.suite(),
535	>	ExecutorCompletionServiceTest.suite(),
536	>	FutureTaskTest.suite(),
537	>	HashtableTest.suite(),
538	>	LinkedBlockingDequeTest.suite(),
539	>	LinkedBlockingQueueTest.suite(),
540	>	LinkedListTest.suite(),
541	>	LockSupportTest.suite(),
542	>	PriorityBlockingQueueTest.suite(),
543	>	PriorityQueueTest.suite(),
544	>	ReentrantLockTest.suite(),
545	>	ReentrantReadWriteLockTest.suite(),
546	>	ScheduledExecutorTest.suite(),
547	>	ScheduledExecutorSubclassTest.suite(),
548	>	SemaphoreTest.suite(),
549	>	SynchronousQueueTest.suite(),
550	>	SystemTest.suite(),
551	>	ThreadLocalTest.suite(),
552	>	ThreadPoolExecutorTest.suite(),
553	>	ThreadPoolExecutorSubclassTest.suite(),
554	>	ThreadTest.suite(),
555	>	TimeUnitTest.suite(),
556	>	TreeMapTest.suite(),
557	>	TreeSetTest.suite(),
558	>	TreeSubMapTest.suite(),
559	>	TreeSubSetTest.suite(),
560	>	VectorTest.suite());
561	>
562	>	// Java8+ test classes
563	>	if (atLeastJava8()) {
564	>	String[] java8TestClassNames = {
565	>	"ArrayDeque8Test",
566	>	"Atomic8Test",
567	>	"CompletableFutureTest",
568	>	"ConcurrentHashMap8Test",
569	>	"CountedCompleter8Test",
570	>	"DoubleAccumulatorTest",
571	>	"DoubleAdderTest",
572	>	"ForkJoinPool8Test",
573	>	"ForkJoinTask8Test",
574	>	"HashMapTest",
575	>	"LinkedBlockingDeque8Test",
576	>	"LinkedBlockingQueue8Test",
577	>	"LinkedHashMapTest",
578	>	"LongAccumulatorTest",
579	>	"LongAdderTest",
580	>	"SplittableRandomTest",
581	>	"StampedLockTest",
582	>	"SubmissionPublisherTest",
583	>	"ThreadLocalRandom8Test",
584	>	"TimeUnit8Test",
585	>	};
586	>	addNamedTestClasses(suite, java8TestClassNames);
587	>	}
588	>
589	>	// Java9+ test classes
590	>	if (atLeastJava9()) {
591	>	String[] java9TestClassNames = {
592	>	"AtomicBoolean9Test",
593	>	"AtomicInteger9Test",
594	>	"AtomicIntegerArray9Test",
595	>	"AtomicLong9Test",
596	>	"AtomicLongArray9Test",
597	>	"AtomicReference9Test",
598	>	"AtomicReferenceArray9Test",
599	>	"ExecutorCompletionService9Test",
600	>	"ForkJoinPool9Test",
601	>	};
602	>	addNamedTestClasses(suite, java9TestClassNames);
603	>	}
604	>
605	>	if (atLeastJava17()) {
606	>	String[] java17TestClassNames = {
607	>	"ForkJoinPool19Test",
608	>	};
609	>	addNamedTestClasses(suite, java17TestClassNames);
610	>	}
611		return suite;
612		}
613
614	+	/** Returns list of junit-style test method names in given class. */
615	+	public static ArrayList<String> testMethodNames(Class<?> testClass) {
616	+	Method[] methods = testClass.getDeclaredMethods();
617	+	ArrayList<String> names = new ArrayList<>(methods.length);
618	+	for (Method method : methods) {
619	+	if (method.getName().startsWith("test")
620	+	&& Modifier.isPublic(method.getModifiers())
621	+	// method.getParameterCount() requires jdk8+
622	+	&& method.getParameterTypes().length == 0) {
623	+	names.add(method.getName());
624	+	}
625	+	}
626	+	return names;
627	+	}
628	+
629	+	/**
630	+	* Returns junit-style testSuite for the given test class, but
631	+	* parameterized by passing extra data to each test.
632	+	*/
633	+	public static <ExtraData> Test parameterizedTestSuite
634	+	(Class<? extends JSR166TestCase> testClass,
635	+	Class<ExtraData> dataClass,
636	+	ExtraData data) {
637	+	try {
638	+	TestSuite suite = new TestSuite();
639	+	Constructor c =
640	+	testClass.getDeclaredConstructor(dataClass, String.class);
641	+	for (String methodName : testMethodNames(testClass))
642	+	suite.addTest((Test) c.newInstance(data, methodName));
643	+	return suite;
644	+	} catch (ReflectiveOperationException e) {
645	+	throw new AssertionError(e);
646	+	}
647	+	}
648	+
649	+	/**
650	+	* Returns junit-style testSuite for the jdk8 extension of the
651	+	* given test class, but parameterized by passing extra data to
652	+	* each test.  Uses reflection to allow compilation in jdk7.
653	+	*/
654	+	public static <ExtraData> Test jdk8ParameterizedTestSuite
655	+	(Class<? extends JSR166TestCase> testClass,
656	+	Class<ExtraData> dataClass,
657	+	ExtraData data) {
658	+	if (atLeastJava8()) {
659	+	String name = testClass.getName();
660	+	String name8 = name.replaceAll("Test$", "8Test");
661	+	if (name.equals(name8)) throw new AssertionError(name);
662	+	try {
663	+	return (Test)
664	+	Class.forName(name8)
665	+	.getMethod("testSuite", dataClass)
666	+	.invoke(null, data);
667	+	} catch (ReflectiveOperationException e) {
668	+	throw new AssertionError(e);
669	+	}
670	+	} else {
671	+	return new TestSuite();
672	+	}
673	+	}
674	+
675	+	// Delays for timing-dependent tests, in milliseconds.
676
677		public static long SHORT_DELAY_MS;
678		public static long SMALL_DELAY_MS;
679		public static long MEDIUM_DELAY_MS;
680		public static long LONG_DELAY_MS;
681
682	+	/**
683	+	* A delay significantly longer than LONG_DELAY_MS.
684	+	* Use this in a thread that is waited for via awaitTermination(Thread).
685	+	*/
686	+	public static long LONGER_DELAY_MS;
687	+
688	+	private static final long RANDOM_TIMEOUT;
689	+	private static final long RANDOM_EXPIRED_TIMEOUT;
690	+	private static final TimeUnit RANDOM_TIMEUNIT;
691	+	static {
692	+	ThreadLocalRandom rnd = ThreadLocalRandom.current();
693	+	long[] timeouts = { Long.MIN_VALUE, -1, 0, 1, Long.MAX_VALUE };
694	+	RANDOM_TIMEOUT = timeouts[rnd.nextInt(timeouts.length)];
695	+	RANDOM_EXPIRED_TIMEOUT = timeouts[rnd.nextInt(3)];
696	+	TimeUnit[] timeUnits = TimeUnit.values();
697	+	RANDOM_TIMEUNIT = timeUnits[rnd.nextInt(timeUnits.length)];
698	+	}
699
700		/**
701	<	* Return the shortest timed delay. This could
702	<	* be reimplemented to use for example a Property.
703	<	*/
704	<	protected long getShortDelay() {
705	<	return 50;
701	>	* Returns a timeout for use when any value at all will do.
702	>	*/
703	>	static long randomTimeout() { return RANDOM_TIMEOUT; }
704	>
705	>	/**
706	>	* Returns a timeout that means "no waiting", i.e. not positive.
707	>	*/
708	>	static long randomExpiredTimeout() { return RANDOM_EXPIRED_TIMEOUT; }
709	>
710	>	/**
711	>	* Returns a random non-null TimeUnit.
712	>	*/
713	>	static TimeUnit randomTimeUnit() { return RANDOM_TIMEUNIT; }
714	>
715	>	/**
716	>	* Returns a random boolean; a "coin flip".
717	>	*/
718	>	static boolean randomBoolean() {
719	>	return ThreadLocalRandom.current().nextBoolean();
720	>	}
721	>
722	>	/**
723	>	* Returns a random element from given choices.
724	>	*/
725	>	<T> T chooseRandomly(List<T> choices) {
726	>	return choices.get(ThreadLocalRandom.current().nextInt(choices.size()));
727	>	}
728	>
729	>	/**
730	>	* Returns a random element from given choices.
731	>	*/
732	>	@SuppressWarnings("unchecked")
733	>	<T> T chooseRandomly(T... choices) {
734	>	return choices[ThreadLocalRandom.current().nextInt(choices.length)];
735		}
736
737	+	/**
738	+	* Returns the shortest timed delay. This can be scaled up for
739	+	* slow machines using the jsr166.delay.factor system property,
740	+	* or via jtreg's -timeoutFactor: flag.
741	+	* http://openjdk.java.net/jtreg/command-help.html
742	+	*/
743	+	protected long getShortDelay() {
744	+	return (long) (50 * delayFactor);
745	+	}
746
747		/**
748	<	* Set delays as multiples of SHORT_DELAY.
748	>	* Sets delays as multiples of SHORT_DELAY.
749		*/
750	<	protected  void setDelays() {
750	>	protected void setDelays() {
751		SHORT_DELAY_MS = getShortDelay();
752	<	SMALL_DELAY_MS = SHORT_DELAY_MS * 5;
752	>	SMALL_DELAY_MS  = SHORT_DELAY_MS * 5;
753		MEDIUM_DELAY_MS = SHORT_DELAY_MS * 10;
754	<	LONG_DELAY_MS = SHORT_DELAY_MS * 50;
754	>	LONG_DELAY_MS   = SHORT_DELAY_MS * 200;
755	>	LONGER_DELAY_MS = 2 * LONG_DELAY_MS;
756		}
757
758	+	private static final long TIMEOUT_DELAY_MS
759	+	= (long) (12.0 * Math.cbrt(delayFactor));
760	+
761		/**
762	<	* Flag set true if any threadAssert methods fail
762	>	* Returns a timeout in milliseconds to be used in tests that verify
763	>	* that operations block or time out.  We want this to be longer
764	>	* than the OS scheduling quantum, but not too long, so don't scale
765	>	* linearly with delayFactor; we use "crazy" cube root instead.
766		*/
767	<	volatile boolean threadFailed;
767	>	static long timeoutMillis() {
768	>	return TIMEOUT_DELAY_MS;
769	>	}
770
771		/**
772	<	* Initialize test to indicate that no thread assertions have failed
772	>	* Returns a new Date instance representing a time at least
773	>	* delayMillis milliseconds in the future.
774		*/
775	<	public void setUp() {
775	>	Date delayedDate(long delayMillis) {
776	>	// Add 1 because currentTimeMillis is known to round into the past.
777	>	return new Date(System.currentTimeMillis() + delayMillis + 1);
778	>	}
779	>
780	>	/**
781	>	* The first exception encountered if any threadAssertXXX method fails.
782	>	*/
783	>	private final AtomicReference<Throwable> threadFailure
784	>	= new AtomicReference<>(null);
785	>
786	>	/**
787	>	* Records an exception so that it can be rethrown later in the test
788	>	* harness thread, triggering a test case failure.  Only the first
789	>	* failure is recorded; subsequent calls to this method from within
790	>	* the same test have no effect.
791	>	*/
792	>	public void threadRecordFailure(Throwable t) {
793	>	System.err.println(t);
794	>	if (threadFailure.compareAndSet(null, t))
795	>	dumpTestThreads();
796	>	}
797	>
798	>	public void setUp() {
799		setDelays();
800	<	threadFailed = false;
800	>	}
801	>
802	>	void tearDownFail(String format, Object... args) {
803	>	String msg = toString() + ": " + String.format(format, args);
804	>	System.err.println(msg);
805	>	dumpTestThreads();
806	>	throw new AssertionError(msg);
807		}
808
809		/**
810	<	* Trigger test case failure if any thread assertions have failed
810	>	* Extra checks that get done for all test cases.
811	>	*
812	>	* Triggers test case failure if any thread assertions have failed,
813	>	* by rethrowing, in the test harness thread, any exception recorded
814	>	* earlier by threadRecordFailure.
815	>	*
816	>	* Triggers test case failure if interrupt status is set in the main thread.
817		*/
818	<	public void tearDown() {
819	<	assertFalse(threadFailed);
818	>	public void tearDown() throws Exception {
819	>	Throwable t = threadFailure.getAndSet(null);
820	>	if (t != null) {
821	>	if (t instanceof Error)
822	>	throw (Error) t;
823	>	else if (t instanceof RuntimeException)
824	>	throw (RuntimeException) t;
825	>	else if (t instanceof Exception)
826	>	throw (Exception) t;
827	>	else
828	>	throw new AssertionError(t.toString(), t);
829	>	}
830	>
831	>	if (Thread.interrupted())
832	>	tearDownFail("interrupt status set in main thread");
833	>
834	>	checkForkJoinPoolThreadLeaks();
835	>	}
836	>
837	>	/**
838	>	* Finds missing PoolCleaners
839	>	*/
840	>	void checkForkJoinPoolThreadLeaks() throws InterruptedException {
841	>	Thread[] survivors = new Thread[7];
842	>	int count = Thread.enumerate(survivors);
843	>	for (int i = 0; i < count; i++) {
844	>	Thread thread = survivors[i];
845	>	String name = thread.getName();
846	>	if (name.startsWith("ForkJoinPool-")) {
847	>	// give thread some time to terminate
848	>	thread.join(LONG_DELAY_MS);
849	>	if (thread.isAlive())
850	>	tearDownFail("Found leaked ForkJoinPool thread thread=%s",
851	>	thread);
852	>	}
853	>	}
854	>
855	>	if (!ForkJoinPool.commonPool()
856	>	.awaitQuiescence(LONG_DELAY_MS, MILLISECONDS))
857	>	tearDownFail("ForkJoin common pool thread stuck");
858		}
859
860		/**
861	<	* Fail, also setting status to indicate current testcase should fail
862	<	*/
861	>	* Just like fail(reason), but additionally recording (using
862	>	* threadRecordFailure) any AssertionError thrown, so that the
863	>	* current testcase will fail.
864	>	*/
865		public void threadFail(String reason) {
866	<	threadFailed = true;
867	<	fail(reason);
866	>	try {
867	>	fail(reason);
868	>	} catch (AssertionError fail) {
869	>	threadRecordFailure(fail);
870	>	throw fail;
871	>	}
872		}
873
874		/**
875	<	* If expression not true, set status to indicate current testcase
876	<	* should fail
877	<	*/
875	>	* Just like assertTrue(b), but additionally recording (using
876	>	* threadRecordFailure) any AssertionError thrown, so that the
877	>	* current testcase will fail.
878	>	*/
879		public void threadAssertTrue(boolean b) {
880	<	if (!b) {
213	<	threadFailed = true;
880	>	try {
881		assertTrue(b);
882	+	} catch (AssertionError fail) {
883	+	threadRecordFailure(fail);
884	+	throw fail;
885		}
886		}
887
888		/**
889	<	* If expression not false, set status to indicate current testcase
890	<	* should fail
891	<	*/
889	>	* Just like assertFalse(b), but additionally recording (using
890	>	* threadRecordFailure) any AssertionError thrown, so that the
891	>	* current testcase will fail.
892	>	*/
893		public void threadAssertFalse(boolean b) {
894	<	if (b) {
224	<	threadFailed = true;
894	>	try {
895		assertFalse(b);
896	+	} catch (AssertionError fail) {
897	+	threadRecordFailure(fail);
898	+	throw fail;
899		}
900		}
901
902		/**
903	<	* If argument not null, set status to indicate current testcase
904	<	* should fail
905	<	*/
903	>	* Just like assertNull(x), but additionally recording (using
904	>	* threadRecordFailure) any AssertionError thrown, so that the
905	>	* current testcase will fail.
906	>	*/
907		public void threadAssertNull(Object x) {
908	<	if (x != null) {
235	<	threadFailed = true;
908	>	try {
909		assertNull(x);
910	+	} catch (AssertionError fail) {
911	+	threadRecordFailure(fail);
912	+	throw fail;
913		}
914		}
915
916		/**
917	<	* If arguments not equal, set status to indicate current testcase
918	<	* should fail
919	<	*/
917	>	* Just like assertEquals(x, y), but additionally recording (using
918	>	* threadRecordFailure) any AssertionError thrown, so that the
919	>	* current testcase will fail.
920	>	*/
921		public void threadAssertEquals(long x, long y) {
922	<	if (x != y) {
246	<	threadFailed = true;
922	>	try {
923		assertEquals(x, y);
924	+	} catch (AssertionError fail) {
925	+	threadRecordFailure(fail);
926	+	throw fail;
927		}
928		}
929
930		/**
931	<	* If arguments not equal, set status to indicate current testcase
932	<	* should fail
933	<	*/
931	>	* Just like assertEquals(x, y), but additionally recording (using
932	>	* threadRecordFailure) any AssertionError thrown, so that the
933	>	* current testcase will fail.
934	>	*/
935		public void threadAssertEquals(Object x, Object y) {
936	<	if (x != y && (x == null || !x.equals(y))) {
257	<	threadFailed = true;
936	>	try {
937		assertEquals(x, y);
938	+	} catch (AssertionError fail) {
939	+	threadRecordFailure(fail);
940	+	throw fail;
941	+	} catch (Throwable fail) {
942	+	threadUnexpectedException(fail);
943	+	}
944	+	}
945	+
946	+	/**
947	+	* Just like assertSame(x, y), but additionally recording (using
948	+	* threadRecordFailure) any AssertionError thrown, so that the
949	+	* current testcase will fail.
950	+	*/
951	+	public void threadAssertSame(Object x, Object y) {
952	+	try {
953	+	assertSame(x, y);
954	+	} catch (AssertionError fail) {
955	+	threadRecordFailure(fail);
956	+	throw fail;
957		}
958		}
959
960		/**
961	<	* threadFail with message "should throw exception"
962	<	*/
961	>	* Calls threadFail with message "should throw exception".
962	>	*/
963		public void threadShouldThrow() {
964	<	threadFailed = true;
267	<	fail("should throw exception");
964	>	threadFail("should throw exception");
965		}
966
967		/**
968	<	* threadFail with message "Unexpected exception"
968	>	* Calls threadFail with message "should throw" + exceptionName.
969		*/
970	<	public void threadUnexpectedException() {
971	<	threadFailed = true;
275	<	fail("Unexpected exception");
970	>	public void threadShouldThrow(String exceptionName) {
971	>	threadFail("should throw " + exceptionName);
972		}
973
974	+	/**
975	+	* Records the given exception using {@link #threadRecordFailure},
976	+	* then rethrows the exception, wrapping it in an AssertionError
977	+	* if necessary.
978	+	*/
979	+	public void threadUnexpectedException(Throwable t) {
980	+	threadRecordFailure(t);
981	+	t.printStackTrace();
982	+	if (t instanceof RuntimeException)
983	+	throw (RuntimeException) t;
984	+	else if (t instanceof Error)
985	+	throw (Error) t;
986	+	else
987	+	throw new AssertionError("unexpected exception: " + t, t);
988	+	}
989	+
990	+	/**
991	+	* Delays, via Thread.sleep, for the given millisecond delay, but
992	+	* if the sleep is shorter than specified, may re-sleep or yield
993	+	* until time elapses.  Ensures that the given time, as measured
994	+	* by System.nanoTime(), has elapsed.
995	+	*/
996	+	static void delay(long millis) throws InterruptedException {
997	+	long nanos = millis * (1000 * 1000);
998	+	final long wakeupTime = System.nanoTime() + nanos;
999	+	do {
1000	+	if (millis > 0L)
1001	+	Thread.sleep(millis);
1002	+	else // too short to sleep
1003	+	Thread.yield();
1004	+	nanos = wakeupTime - System.nanoTime();
1005	+	millis = nanos / (1000 * 1000);
1006	+	} while (nanos >= 0L);
1007	+	}
1008	+
1009	+	/**
1010	+	* Allows use of try-with-resources with per-test thread pools.
1011	+	*/
1012	+	class PoolCleaner implements AutoCloseable {
1013	+	private final ExecutorService pool;
1014	+	public PoolCleaner(ExecutorService pool) { this.pool = pool; }
1015	+	public void close() { joinPool(pool); }
1016	+	}
1017
1018		/**
1019	<	* Wait out termination of a thread pool or fail doing so
1019	>	* An extension of PoolCleaner that has an action to release the pool.
1020		*/
1021	<	public void joinPool(ExecutorService exec) {
1021	>	class PoolCleanerWithReleaser extends PoolCleaner {
1022	>	private final Runnable releaser;
1023	>	public PoolCleanerWithReleaser(ExecutorService pool, Runnable releaser) {
1024	>	super(pool);
1025	>	this.releaser = releaser;
1026	>	}
1027	>	public void close() {
1028	>	try {
1029	>	releaser.run();
1030	>	} finally {
1031	>	super.close();
1032	>	}
1033	>	}
1034	>	}
1035	>
1036	>	PoolCleaner cleaner(ExecutorService pool) {
1037	>	return new PoolCleaner(pool);
1038	>	}
1039	>
1040	>	PoolCleaner cleaner(ExecutorService pool, Runnable releaser) {
1041	>	return new PoolCleanerWithReleaser(pool, releaser);
1042	>	}
1043	>
1044	>	PoolCleaner cleaner(ExecutorService pool, CountDownLatch latch) {
1045	>	return new PoolCleanerWithReleaser(pool, releaser(latch));
1046	>	}
1047	>
1048	>	Runnable releaser(final CountDownLatch latch) {
1049	>	return new Runnable() { public void run() {
1050	>	do { latch.countDown(); }
1051	>	while (latch.getCount() > 0);
1052	>	}};
1053	>	}
1054	>
1055	>	PoolCleaner cleaner(ExecutorService pool, AtomicBoolean flag) {
1056	>	return new PoolCleanerWithReleaser(pool, releaser(flag));
1057	>	}
1058	>
1059	>	Runnable releaser(final AtomicBoolean flag) {
1060	>	return new Runnable() { public void run() { flag.set(true); }};
1061	>	}
1062	>
1063	>	/**
1064	>	* Waits out termination of a thread pool or fails doing so.
1065	>	*/
1066	>	void joinPool(ExecutorService pool) {
1067		try {
1068	<	exec.shutdown();
1069	<	assertTrue(exec.awaitTermination(LONG_DELAY_MS, TimeUnit.MILLISECONDS));
1070	<	} catch(InterruptedException ie) {
1071	<	fail("Unexpected exception");
1068	>	pool.shutdown();
1069	>	if (!pool.awaitTermination(20 * LONG_DELAY_MS, MILLISECONDS)) {
1070	>	try {
1071	>	threadFail("ExecutorService " + pool +
1072	>	" did not terminate in a timely manner");
1073	>	} finally {
1074	>	// last resort, for the benefit of subsequent tests
1075	>	pool.shutdownNow();
1076	>	pool.awaitTermination(MEDIUM_DELAY_MS, MILLISECONDS);
1077	>	}
1078	>	}
1079	>	} catch (SecurityException ok) {
1080	>	// Allowed in case test doesn't have privs
1081	>	} catch (InterruptedException fail) {
1082	>	threadFail("Unexpected InterruptedException");
1083	>	}
1084	>	}
1085	>
1086	>	/**
1087	>	* Like Runnable, but with the freedom to throw anything.
1088	>	* junit folks had the same idea:
1089	>	* http://junit.org/junit5/docs/snapshot/api/org/junit/gen5/api/Executable.html
1090	>	*/
1091	>	interface Action { public void run() throws Throwable; }
1092	>
1093	>	/**
1094	>	* Runs all the given actions in parallel, failing if any fail.
1095	>	* Useful for running multiple variants of tests that are
1096	>	* necessarily individually slow because they must block.
1097	>	*/
1098	>	void testInParallel(Action ... actions) {
1099	>	ExecutorService pool = Executors.newCachedThreadPool();
1100	>	try (PoolCleaner cleaner = cleaner(pool)) {
1101	>	ArrayList<Future<?>> futures = new ArrayList<>(actions.length);
1102	>	for (final Action action : actions)
1103	>	futures.add(pool.submit(new CheckedRunnable() {
1104	>	public void realRun() throws Throwable { action.run();}}));
1105	>	for (Future<?> future : futures)
1106	>	try {
1107	>	assertNull(future.get(LONG_DELAY_MS, MILLISECONDS));
1108	>	} catch (ExecutionException ex) {
1109	>	threadUnexpectedException(ex.getCause());
1110	>	} catch (Exception ex) {
1111	>	threadUnexpectedException(ex);
1112	>	}
1113	>	}
1114	>	}
1115	>
1116	>	/** Returns true if thread info might be useful in a thread dump. */
1117	>	static boolean threadOfInterest(ThreadInfo info) {
1118	>	final String name = info.getThreadName();
1119	>	String lockName;
1120	>	if (name == null)
1121	>	return true;
1122	>	if (name.equals("Signal Dispatcher")
1123	>	|| name.equals("WedgedTestDetector"))
1124	>	return false;
1125	>	if (name.equals("Reference Handler")) {
1126	>	// Reference Handler stacktrace changed in JDK-8156500
1127	>	StackTraceElement[] stackTrace; String methodName;
1128	>	if ((stackTrace = info.getStackTrace()) != null
1129	>	&& stackTrace.length > 0
1130	>	&& (methodName = stackTrace[0].getMethodName()) != null
1131	>	&& methodName.equals("waitForReferencePendingList"))
1132	>	return false;
1133	>	// jdk8 Reference Handler stacktrace
1134	>	if ((lockName = info.getLockName()) != null
1135	>	&& lockName.startsWith("java.lang.ref"))
1136	>	return false;
1137	>	}
1138	>	if ((name.equals("Finalizer") || name.equals("Common-Cleaner"))
1139	>	&& (lockName = info.getLockName()) != null
1140	>	&& lockName.startsWith("java.lang.ref"))
1141	>	return false;
1142	>	if (name.startsWith("ForkJoinPool.commonPool-worker")
1143	>	&& (lockName = info.getLockName()) != null
1144	>	&& lockName.startsWith("java.util.concurrent.ForkJoinPool"))
1145	>	return false;
1146	>	return true;
1147	>	}
1148	>
1149	>	/**
1150	>	* A debugging tool to print stack traces of most threads, as jstack does.
1151	>	* Uninteresting threads are filtered out.
1152	>	*/
1153	>	@SuppressWarnings("removal")
1154	>	static void dumpTestThreads() {
1155	>	SecurityManager sm = System.getSecurityManager();
1156	>	if (sm != null) {
1157	>	try {
1158	>	System.setSecurityManager(null);
1159	>	} catch (SecurityException giveUp) {
1160	>	return;
1161	>	}
1162		}
1163	+
1164	+	System.err.println("------ stacktrace dump start ------");
1165	+	for (ThreadInfo info : THREAD_MXBEAN.dumpAllThreads(true, true))
1166	+	if (threadOfInterest(info))
1167	+	System.err.print(info);
1168	+	System.err.println("------ stacktrace dump end ------");
1169	+
1170	+	if (sm != null) System.setSecurityManager(sm);
1171		}
1172
1173	+	/**
1174	+	* Checks that thread eventually enters the expected blocked thread state.
1175	+	*/
1176	+	void assertThreadBlocks(Thread thread, Thread.State expected) {
1177	+	// always sleep at least 1 ms, with high probability avoiding
1178	+	// transitory states
1179	+	for (long retries = LONG_DELAY_MS * 3 / 4; retries-->0; ) {
1180	+	try { delay(1); }
1181	+	catch (InterruptedException fail) {
1182	+	throw new AssertionError("Unexpected InterruptedException", fail);
1183	+	}
1184	+	Thread.State s = thread.getState();
1185	+	if (s == expected)
1186	+	return;
1187	+	else if (s == Thread.State.TERMINATED)
1188	+	fail("Unexpected thread termination");
1189	+	}
1190	+	fail("timed out waiting for thread to enter thread state " + expected);
1191	+	}
1192
1193		/**
1194	<	* fail with message "should throw exception"
1195	<	*/
1194	>	* Returns the thread's blocker's class name, if any, else null.
1195	>	*/
1196	>	String blockerClassName(Thread thread) {
1197	>	ThreadInfo threadInfo; LockInfo lockInfo;
1198	>	if ((threadInfo = THREAD_MXBEAN.getThreadInfo(thread.getId(), 0)) != null
1199	>	&& (lockInfo = threadInfo.getLockInfo()) != null)
1200	>	return lockInfo.getClassName();
1201	>	return null;
1202	>	}
1203	>
1204	>	/**
1205	>	* Checks that future.get times out, with the default timeout of
1206	>	* {@code timeoutMillis()}.
1207	>	*/
1208	>	void assertFutureTimesOut(Future<?> future) {
1209	>	assertFutureTimesOut(future, timeoutMillis());
1210	>	}
1211	>
1212	>	/**
1213	>	* Checks that future.get times out, with the given millisecond timeout.
1214	>	*/
1215	>	void assertFutureTimesOut(Future<?> future, long timeoutMillis) {
1216	>	long startTime = System.nanoTime();
1217	>	try {
1218	>	future.get(timeoutMillis, MILLISECONDS);
1219	>	shouldThrow();
1220	>	} catch (TimeoutException success) {
1221	>	} catch (Exception fail) {
1222	>	threadUnexpectedException(fail);
1223	>	}
1224	>	assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
1225	>	assertFalse(future.isDone());
1226	>	}
1227	>
1228	>	/**
1229	>	* Fails with message "should throw exception".
1230	>	*/
1231		public void shouldThrow() {
1232		fail("Should throw exception");
1233		}
1234
1235		/**
1236	<	* fail with message "Unexpected exception"
1236	>	* Fails with message "should throw " + exceptionName.
1237		*/
1238	<	public void unexpectedException() {
1239	<	fail("Unexpected exception");
1238	>	public void shouldThrow(String exceptionName) {
1239	>	fail("Should throw " + exceptionName);
1240		}
1241
1242	+	/**
1243	+	* The maximum number of consecutive spurious wakeups we should
1244	+	* tolerate (from APIs like LockSupport.park) before failing a test.
1245	+	*/
1246	+	static final int MAX_SPURIOUS_WAKEUPS = 10;
1247
1248		/**
1249		* The number of elements to place in collections, arrays, etc.
1250	+	* Must be at least ten;
1251	+	*/
1252	+	public static final int SIZE = 32;
1253	+
1254	+	static Item[] seqItems(int size) {
1255	+	Item[] s = new Item[size];
1256	+	for (int i = 0; i < size; ++i)
1257	+	s[i] = new Item(i);
1258	+	return s;
1259	+	}
1260	+	static Item[] negativeSeqItems(int size) {
1261	+	Item[] s = new Item[size];
1262	+	for (int i = 0; i < size; ++i)
1263	+	s[i] = new Item(-i);
1264	+	return s;
1265	+	}
1266	+
1267	+	// Many tests rely on defaultItems all being sequential nonnegative
1268	+	public static final Item[] defaultItems = seqItems(SIZE);
1269	+
1270	+	static Item itemFor(int i) { // check cache for defaultItems
1271	+	Item[] items = defaultItems;
1272	+	return (i >= 0 && i < items.length) ? items[i] : new Item(i);
1273	+	}
1274	+
1275	+	public static final Item zero  = defaultItems[0];
1276	+	public static final Item one   = defaultItems[1];
1277	+	public static final Item two   = defaultItems[2];
1278	+	public static final Item three = defaultItems[3];
1279	+	public static final Item four  = defaultItems[4];
1280	+	public static final Item five  = defaultItems[5];
1281	+	public static final Item six   = defaultItems[6];
1282	+	public static final Item seven = defaultItems[7];
1283	+	public static final Item eight = defaultItems[8];
1284	+	public static final Item nine  = defaultItems[9];
1285	+	public static final Item ten   = defaultItems[10];
1286	+
1287	+	public static final Item[] negativeItems = negativeSeqItems(SIZE);
1288	+
1289	+	public static final Item minusOne   = negativeItems[1];
1290	+	public static final Item minusTwo   = negativeItems[2];
1291	+	public static final Item minusThree = negativeItems[3];
1292	+	public static final Item minusFour  = negativeItems[4];
1293	+	public static final Item minusFive  = negativeItems[5];
1294	+	public static final Item minusSix   = negativeItems[6];
1295	+	public static final Item minusSeven = negativeItems[7];
1296	+	public static final Item minusEight = negativeItems[8];
1297	+	public static final Item minusNone  = negativeItems[9];
1298	+	public static final Item minusTen   = negativeItems[10];
1299	+
1300	+	// elements expected to be missing
1301	+	public static final Item fortytwo = new Item(42);
1302	+	public static final Item eightysix = new Item(86);
1303	+	public static final Item ninetynine = new Item(99);
1304	+
1305	+	// Interop across Item, int
1306	+
1307	+	static void mustEqual(Item x, Item y) {
1308	+	if (x != y)
1309	+	assertEquals(x.value, y.value);
1310	+	}
1311	+	static void mustEqual(Item x, int y) {
1312	+	assertEquals(x.value, y);
1313	+	}
1314	+	static void mustEqual(int x, Item y) {
1315	+	assertEquals(x, y.value);
1316	+	}
1317	+	static void mustEqual(int x, int y) {
1318	+	assertEquals(x, y);
1319	+	}
1320	+	static void mustEqual(Object x, Object y) {
1321	+	if (x != y)
1322	+	assertEquals(x, y);
1323	+	}
1324	+	static void mustEqual(int x, Object y) {
1325	+	if (y instanceof Item)
1326	+	assertEquals(x, ((Item)y).value);
1327	+	else fail();
1328	+	}
1329	+	static void mustEqual(Object x, int y) {
1330	+	if (x instanceof Item)
1331	+	assertEquals(((Item)x).value, y);
1332	+	else fail();
1333	+	}
1334	+	static void mustEqual(boolean x, boolean y) {
1335	+	assertEquals(x, y);
1336	+	}
1337	+	static void mustEqual(long x, long y) {
1338	+	assertEquals(x, y);
1339	+	}
1340	+	static void mustEqual(double x, double y) {
1341	+	assertEquals(x, y);
1342	+	}
1343	+	static void mustContain(Collection<Item> c, int i) {
1344	+	assertTrue(c.contains(itemFor(i)));
1345	+	}
1346	+	static void mustContain(Collection<Item> c, Item i) {
1347	+	assertTrue(c.contains(i));
1348	+	}
1349	+	static void mustNotContain(Collection<Item> c, int i) {
1350	+	assertFalse(c.contains(itemFor(i)));
1351	+	}
1352	+	static void mustNotContain(Collection<Item> c, Item i) {
1353	+	assertFalse(c.contains(i));
1354	+	}
1355	+	static void mustRemove(Collection<Item> c, int i) {
1356	+	assertTrue(c.remove(itemFor(i)));
1357	+	}
1358	+	static void mustRemove(Collection<Item> c, Item i) {
1359	+	assertTrue(c.remove(i));
1360	+	}
1361	+	static void mustNotRemove(Collection<Item> c, int i) {
1362	+	assertFalse(c.remove(itemFor(i)));
1363	+	}
1364	+	static void mustNotRemove(Collection<Item> c, Item i) {
1365	+	assertFalse(c.remove(i));
1366	+	}
1367	+	static void mustAdd(Collection<Item> c, int i) {
1368	+	assertTrue(c.add(itemFor(i)));
1369	+	}
1370	+	static void mustAdd(Collection<Item> c, Item i) {
1371	+	assertTrue(c.add(i));
1372	+	}
1373	+	static void mustOffer(Queue<Item> c, int i) {
1374	+	assertTrue(c.offer(itemFor(i)));
1375	+	}
1376	+	static void mustOffer(Queue<Item> c, Item i) {
1377	+	assertTrue(c.offer(i));
1378	+	}
1379	+
1380	+	/**
1381	+	* Runs Runnable r with a security policy that permits precisely
1382	+	* the specified permissions.  If there is no current security
1383	+	* manager, the runnable is run twice, both with and without a
1384	+	* security manager.  We require that any security manager permit
1385	+	* getPolicy/setPolicy.
1386		*/
1387	<	static final int SIZE = 20;
1387	>	@SuppressWarnings("removal")
1388	>	public void runWithPermissions(Runnable r, Permission... permissions) {
1389	>	SecurityManager sm = System.getSecurityManager();
1390	>	if (sm == null) {
1391	>	r.run();
1392	>	}
1393	>	runWithSecurityManagerWithPermissions(r, permissions);
1394	>	}
1395
1396	<	// Some convenient Integer constants
1396	>	/**
1397	>	* Runs Runnable r with a security policy that permits precisely
1398	>	* the specified permissions.  If there is no current security
1399	>	* manager, a temporary one is set for the duration of the
1400	>	* Runnable.  We require that any security manager permit
1401	>	* getPolicy/setPolicy.
1402	>	*/
1403	>	@SuppressWarnings("removal")
1404	>	public void runWithSecurityManagerWithPermissions(Runnable r,
1405	>	Permission... permissions) {
1406	>	if (!useSecurityManager) return;
1407	>	SecurityManager sm = System.getSecurityManager();
1408	>	if (sm == null) {
1409	>	Policy savedPolicy = Policy.getPolicy();
1410	>	try {
1411	>	Policy.setPolicy(permissivePolicy());
1412	>	System.setSecurityManager(new SecurityManager());
1413	>	runWithSecurityManagerWithPermissions(r, permissions);
1414	>	} finally {
1415	>	System.setSecurityManager(null);
1416	>	Policy.setPolicy(savedPolicy);
1417	>	}
1418	>	} else {
1419	>	Policy savedPolicy = Policy.getPolicy();
1420	>	AdjustablePolicy policy = new AdjustablePolicy(permissions);
1421	>	Policy.setPolicy(policy);
1422
1423	<	static final Integer zero = new Integer(0);
1424	<	static final Integer one = new Integer(1);
1425	<	static final Integer two = new Integer(2);
1426	<	static final Integer three  = new Integer(3);
1427	<	static final Integer four  = new Integer(4);
1428	<	static final Integer five  = new Integer(5);
1429	<	static final Integer six = new Integer(6);
1430	<	static final Integer seven = new Integer(7);
322	<	static final Integer eight = new Integer(8);
323	<	static final Integer nine = new Integer(9);
324	<	static final Integer m1  = new Integer(-1);
325	<	static final Integer m2  = new Integer(-2);
326	<	static final Integer m3  = new Integer(-3);
327	<	static final Integer m4 = new Integer(-4);
328	<	static final Integer m5 = new Integer(-5);
329	<	static final Integer m10 = new Integer(-10);
1423	>	try {
1424	>	r.run();
1425	>	} finally {
1426	>	policy.addPermission(new SecurityPermission("setPolicy"));
1427	>	Policy.setPolicy(savedPolicy);
1428	>	}
1429	>	}
1430	>	}
1431
1432	+	/**
1433	+	* Runs a runnable without any permissions.
1434	+	*/
1435	+	public void runWithoutPermissions(Runnable r) {
1436	+	runWithPermissions(r);
1437	+	}
1438
1439		/**
1440		* A security policy where new permissions can be dynamically added
1441		* or all cleared.
1442		*/
1443	<	static class AdjustablePolicy extends java.security.Policy {
1443	>	@SuppressWarnings("removal")
1444	>	public static class AdjustablePolicy extends java.security.Policy {
1445		Permissions perms = new Permissions();
1446	<	AdjustablePolicy() { }
1446	>	AdjustablePolicy(Permission... permissions) {
1447	>	for (Permission permission : permissions)
1448	>	perms.add(permission);
1449	>	}
1450		void addPermission(Permission perm) { perms.add(perm); }
1451		void clearPermissions() { perms = new Permissions(); }
1452	<	public PermissionCollection getPermissions(CodeSource cs) {
1453	<	return perms;
1454	<	}
1455	<	public PermissionCollection getPermissions(ProtectionDomain pd) {
1456	<	return perms;
1457	<	}
1458	<	public boolean implies(ProtectionDomain pd, Permission p) {
1459	<	return perms.implies(p);
1460	<	}
1461	<	public void refresh() {}
1452	>	public PermissionCollection getPermissions(CodeSource cs) {
1453	>	return perms;
1454	>	}
1455	>	public PermissionCollection getPermissions(ProtectionDomain pd) {
1456	>	return perms;
1457	>	}
1458	>	public boolean implies(ProtectionDomain pd, Permission p) {
1459	>	return perms.implies(p);
1460	>	}
1461	>	public void refresh() {}
1462	>	public String toString() {
1463	>	List<Permission> ps = new ArrayList<>();
1464	>	for (Enumeration<Permission> e = perms.elements(); e.hasMoreElements();)
1465	>	ps.add(e.nextElement());
1466	>	return "AdjustablePolicy with permissions " + ps;
1467	>	}
1468		}
1469
1470	+	/**
1471	+	* Returns a policy containing all the permissions we ever need.
1472	+	*/
1473	+	@SuppressWarnings("removal")
1474	+	public static Policy permissivePolicy() {
1475	+	return new AdjustablePolicy
1476	+	// Permissions j.u.c. needs directly
1477	+	(new RuntimePermission("modifyThread"),
1478	+	new RuntimePermission("getClassLoader"),
1479	+	new RuntimePermission("setContextClassLoader"),
1480	+	// Permissions needed to change permissions!
1481	+	new SecurityPermission("getPolicy"),
1482	+	new SecurityPermission("setPolicy"),
1483	+	new RuntimePermission("setSecurityManager"),
1484	+	// Permissions needed by the junit test harness
1485	+	new RuntimePermission("accessDeclaredMembers"),
1486	+	new PropertyPermission("*", "read"),
1487	+	new java.io.FilePermission("<<ALL FILES>>", "read"));
1488	+	}
1489
1490	<	// Some convenient Runnable classes
1490	>	/**
1491	>	* Sleeps until the given time has elapsed.
1492	>	* Throws AssertionError if interrupted.
1493	>	*/
1494	>	static void sleep(long millis) {
1495	>	try {
1496	>	delay(millis);
1497	>	} catch (InterruptedException fail) {
1498	>	throw new AssertionError("Unexpected InterruptedException", fail);
1499	>	}
1500	>	}
1501
1502	<	static class NoOpRunnable implements Runnable {
1503	<	public void run() {}
1502	>	/**
1503	>	* Spin-waits up to the specified number of milliseconds for the given
1504	>	* thread to enter a wait state: BLOCKED, WAITING, or TIMED_WAITING.
1505	>	* @param waitingForGodot if non-null, an additional condition to satisfy
1506	>	*/
1507	>	void waitForThreadToEnterWaitState(Thread thread, long timeoutMillis,
1508	>	Callable<Boolean> waitingForGodot) {
1509	>	for (long startTime = 0L;;) {
1510	>	switch (thread.getState()) {
1511	>	default: break;
1512	>	case BLOCKED: case WAITING: case TIMED_WAITING:
1513	>	try {
1514	>	if (waitingForGodot == null || waitingForGodot.call())
1515	>	return;
1516	>	} catch (Throwable fail) { threadUnexpectedException(fail); }
1517	>	break;
1518	>	case TERMINATED:
1519	>	fail("Unexpected thread termination");
1520	>	}
1521	>
1522	>	if (startTime == 0L)
1523	>	startTime = System.nanoTime();
1524	>	else if (millisElapsedSince(startTime) > timeoutMillis) {
1525	>	assertTrue(thread.isAlive());
1526	>	if (waitingForGodot == null
1527	>	|| thread.getState() == Thread.State.RUNNABLE)
1528	>	fail("timed out waiting for thread to enter wait state");
1529	>	else
1530	>	fail("timed out waiting for condition, thread state="
1531	>	+ thread.getState());
1532	>	}
1533	>	Thread.yield();
1534	>	}
1535		}
1536
1537	<	static class NoOpCallable implements Callable {
1538	<	public Object call() { return Boolean.TRUE; }
1537	>	/**
1538	>	* Spin-waits up to the specified number of milliseconds for the given
1539	>	* thread to enter a wait state: BLOCKED, WAITING, or TIMED_WAITING.
1540	>	*/
1541	>	void waitForThreadToEnterWaitState(Thread thread, long timeoutMillis) {
1542	>	waitForThreadToEnterWaitState(thread, timeoutMillis, null);
1543		}
1544
1545	<	static final String TEST_STRING = "a test string";
1545	>	/**
1546	>	* Spin-waits up to LONG_DELAY_MS milliseconds for the given thread to
1547	>	* enter a wait state: BLOCKED, WAITING, or TIMED_WAITING.
1548	>	*/
1549	>	void waitForThreadToEnterWaitState(Thread thread) {
1550	>	waitForThreadToEnterWaitState(thread, LONG_DELAY_MS, null);
1551	>	}
1552
1553	<	static class StringTask implements Callable<String> {
1554	<	public String call() { return TEST_STRING; }
1553	>	/**
1554	>	* Spin-waits up to LONG_DELAY_MS milliseconds for the given thread to
1555	>	* enter a wait state: BLOCKED, WAITING, or TIMED_WAITING,
1556	>	* and additionally satisfy the given condition.
1557	>	*/
1558	>	void waitForThreadToEnterWaitState(Thread thread,
1559	>	Callable<Boolean> waitingForGodot) {
1560	>	waitForThreadToEnterWaitState(thread, LONG_DELAY_MS, waitingForGodot);
1561		}
1562
1563	<	static class NPETask implements Callable<String> {
1564	<	public String call() { throw new NullPointerException(); }
1563	>	/**
1564	>	* Spin-waits up to LONG_DELAY_MS milliseconds for the current thread to
1565	>	* be interrupted.  Clears the interrupt status before returning.
1566	>	*/
1567	>	void awaitInterrupted() {
1568	>	for (long startTime = 0L; !Thread.interrupted(); ) {
1569	>	if (startTime == 0L)
1570	>	startTime = System.nanoTime();
1571	>	else if (millisElapsedSince(startTime) > LONG_DELAY_MS)
1572	>	fail("timed out waiting for thread interrupt");
1573	>	Thread.yield();
1574	>	}
1575		}
1576
1577	<	static class CallableOne implements Callable<Integer> {
1578	<	public Integer call() { return one; }
1577	>	/**
1578	>	* Returns the number of milliseconds since time given by
1579	>	* startNanoTime, which must have been previously returned from a
1580	>	* call to {@link System#nanoTime()}.
1581	>	*/
1582	>	static long millisElapsedSince(long startNanoTime) {
1583	>	return NANOSECONDS.toMillis(System.nanoTime() - startNanoTime);
1584		}
1585
1586	<	class ShortRunnable implements Runnable {
1587	<	public void run() {
1588	<	try {
1589	<	Thread.sleep(SHORT_DELAY_MS);
1590	<	}
1591	<	catch(Exception e) {
1592	<	threadUnexpectedException();
1593	<	}
1594	<	}
1586	>	/**
1587	>	* Checks that timed f.get() returns the expected value, and does not
1588	>	* wait for the timeout to elapse before returning.
1589	>	*/
1590	>	<T> void checkTimedGet(Future<T> f, T expectedValue, long timeoutMillis) {
1591	>	long startTime = System.nanoTime();
1592	>	T actual = null;
1593	>	try {
1594	>	actual = f.get(timeoutMillis, MILLISECONDS);
1595	>	} catch (Throwable fail) { threadUnexpectedException(fail); }
1596	>	assertEquals(expectedValue, actual);
1597	>	if (millisElapsedSince(startTime) > timeoutMillis/2)
1598	>	throw new AssertionError("timed get did not return promptly");
1599		}
1600
1601	<	class ShortInterruptedRunnable implements Runnable {
1602	<	public void run() {
1601	>	<T> void checkTimedGet(Future<T> f, T expectedValue) {
1602	>	checkTimedGet(f, expectedValue, LONG_DELAY_MS);
1603	>	}
1604	>
1605	>	/**
1606	>	* Returns a new started daemon Thread running the given runnable.
1607	>	*/
1608	>	Thread newStartedThread(Runnable runnable) {
1609	>	Thread t = new Thread(runnable);
1610	>	t.setDaemon(true);
1611	>	t.start();
1612	>	return t;
1613	>	}
1614	>
1615	>	/**
1616	>	* Returns a new started daemon Thread running the given action,
1617	>	* wrapped in a CheckedRunnable.
1618	>	*/
1619	>	Thread newStartedThread(Action action) {
1620	>	return newStartedThread(checkedRunnable(action));
1621	>	}
1622	>
1623	>	/**
1624	>	* Waits for the specified time (in milliseconds) for the thread
1625	>	* to terminate (using {@link Thread#join(long)}), else interrupts
1626	>	* the thread (in the hope that it may terminate later) and fails.
1627	>	*/
1628	>	void awaitTermination(Thread thread, long timeoutMillis) {
1629	>	try {
1630	>	thread.join(timeoutMillis);
1631	>	} catch (InterruptedException fail) {
1632	>	threadUnexpectedException(fail);
1633	>	}
1634	>	if (thread.getState() != Thread.State.TERMINATED) {
1635	>	String detail = String.format(
1636	>	"timed out waiting for thread to terminate, thread=%s, state=%s" ,
1637	>	thread, thread.getState());
1638		try {
1639	<	Thread.sleep(SHORT_DELAY_MS);
1640	<	threadShouldThrow();
1641	<	}
1642	<	catch(InterruptedException success) {
1639	>	threadFail(detail);
1640	>	} finally {
1641	>	// Interrupt thread __after__ having reported its stack trace
1642	>	thread.interrupt();
1643		}
1644		}
1645		}
1646
1647	<	class SmallRunnable implements Runnable {
1648	<	public void run() {
1647	>	/**
1648	>	* Waits for LONG_DELAY_MS milliseconds for the thread to
1649	>	* terminate (using {@link Thread#join(long)}), else interrupts
1650	>	* the thread (in the hope that it may terminate later) and fails.
1651	>	*/
1652	>	void awaitTermination(Thread t) {
1653	>	awaitTermination(t, LONG_DELAY_MS);
1654	>	}
1655	>
1656	>	// Some convenient Runnable classes
1657	>
1658	>	public abstract class CheckedRunnable implements Runnable {
1659	>	protected abstract void realRun() throws Throwable;
1660	>
1661	>	public final void run() {
1662		try {
1663	<	Thread.sleep(SMALL_DELAY_MS);
1664	<	}
1665	<	catch(Exception e) {
406	<	threadUnexpectedException();
1663	>	realRun();
1664	>	} catch (Throwable fail) {
1665	>	threadUnexpectedException(fail);
1666		}
1667		}
1668		}
1669
1670	<	class SmallPossiblyInterruptedRunnable implements Runnable {
1671	<	public void run() {
1670	>	Runnable checkedRunnable(Action action) {
1671	>	return new CheckedRunnable() {
1672	>	public void realRun() throws Throwable {
1673	>	action.run();
1674	>	}};
1675	>	}
1676	>
1677	>	public abstract class ThreadShouldThrow extends Thread {
1678	>	protected abstract void realRun() throws Throwable;
1679	>
1680	>	final Class<?> exceptionClass;
1681	>
1682	>	<T extends Throwable> ThreadShouldThrow(Class<T> exceptionClass) {
1683	>	this.exceptionClass = exceptionClass;
1684	>	}
1685	>
1686	>	public final void run() {
1687		try {
1688	<	Thread.sleep(SMALL_DELAY_MS);
1689	<	}
1690	<	catch(Exception e) {
1688	>	realRun();
1689	>	} catch (Throwable t) {
1690	>	if (! exceptionClass.isInstance(t))
1691	>	threadUnexpectedException(t);
1692	>	return;
1693		}
1694	+	threadShouldThrow(exceptionClass.getSimpleName());
1695		}
1696		}
1697
1698	<	class SmallCallable implements Callable {
1699	<	public Object call() {
1698	>	public abstract class CheckedInterruptedRunnable implements Runnable {
1699	>	protected abstract void realRun() throws Throwable;
1700	>
1701	>	public final void run() {
1702		try {
1703	<	Thread.sleep(SMALL_DELAY_MS);
1703	>	realRun();
1704	>	} catch (InterruptedException success) {
1705	>	threadAssertFalse(Thread.interrupted());
1706	>	return;
1707	>	} catch (Throwable fail) {
1708	>	threadUnexpectedException(fail);
1709		}
1710	<	catch(Exception e) {
427	<	threadUnexpectedException();
428	<	}
429	<	return Boolean.TRUE;
1710	>	threadShouldThrow("InterruptedException");
1711		}
1712		}
1713
1714	<	class SmallInterruptedRunnable implements Runnable {
1715	<	public void run() {
1714	>	public abstract class CheckedCallable<T> implements Callable<T> {
1715	>	protected abstract T realCall() throws Throwable;
1716	>
1717	>	public final T call() {
1718		try {
1719	<	Thread.sleep(SMALL_DELAY_MS);
1720	<	threadShouldThrow();
1721	<	}
439	<	catch(InterruptedException success) {
1719	>	return realCall();
1720	>	} catch (Throwable fail) {
1721	>	threadUnexpectedException(fail);
1722		}
1723	+	throw new AssertionError("unreached");
1724		}
1725		}
1726
1727	+	public static class NoOpRunnable implements Runnable {
1728	+	public void run() {}
1729	+	}
1730	+
1731	+	public static class NoOpCallable implements Callable<Object> {
1732	+	public Object call() { return Boolean.TRUE; }
1733	+	}
1734
1735	<	class MediumRunnable implements Runnable {
1736	<	public void run() {
1737	<	try {
1738	<	Thread.sleep(MEDIUM_DELAY_MS);
1739	<	}
1740	<	catch(Exception e) {
1741	<	threadUnexpectedException();
1742	<	}
1735	>	public static final String TEST_STRING = "a test string";
1736	>
1737	>	public static class StringTask implements Callable<String> {
1738	>	final String value;
1739	>	public StringTask() { this(TEST_STRING); }
1740	>	public StringTask(String value) { this.value = value; }
1741	>	public String call() { return value; }
1742	>	}
1743	>
1744	>	public Callable<String> latchAwaitingStringTask(final CountDownLatch latch) {
1745	>	return new CheckedCallable<String>() {
1746	>	protected String realCall() {
1747	>	try {
1748	>	latch.await();
1749	>	} catch (InterruptedException quittingTime) {}
1750	>	return TEST_STRING;
1751	>	}};
1752	>	}
1753	>
1754	>	public Runnable countDowner(final CountDownLatch latch) {
1755	>	return new CheckedRunnable() {
1756	>	public void realRun() throws InterruptedException {
1757	>	latch.countDown();
1758	>	}};
1759	>	}
1760	>
1761	>	class LatchAwaiter extends CheckedRunnable {
1762	>	static final int NEW = 0;
1763	>	static final int RUNNING = 1;
1764	>	static final int DONE = 2;
1765	>	final CountDownLatch latch;
1766	>	int state = NEW;
1767	>	LatchAwaiter(CountDownLatch latch) { this.latch = latch; }
1768	>	public void realRun() throws InterruptedException {
1769	>	state = 1;
1770	>	await(latch);
1771	>	state = 2;
1772		}
1773		}
1774
1775	<	class MediumInterruptedRunnable implements Runnable {
1776	<	public void run() {
1777	<	try {
1778	<	Thread.sleep(MEDIUM_DELAY_MS);
1779	<	threadShouldThrow();
1780	<	}
1781	<	catch(InterruptedException success) {
1782	<	}
1775	>	public LatchAwaiter awaiter(CountDownLatch latch) {
1776	>	return new LatchAwaiter(latch);
1777	>	}
1778	>
1779	>	public void await(CountDownLatch latch, long timeoutMillis) {
1780	>	boolean timedOut = false;
1781	>	try {
1782	>	timedOut = !latch.await(timeoutMillis, MILLISECONDS);
1783	>	} catch (Throwable fail) {
1784	>	threadUnexpectedException(fail);
1785		}
1786	+	if (timedOut)
1787	+	fail("timed out waiting for CountDownLatch for "
1788	+	+ (timeoutMillis/1000) + " sec");
1789		}
1790
1791	<	class MediumPossiblyInterruptedRunnable implements Runnable {
1792	<	public void run() {
1793	<	try {
1794	<	Thread.sleep(MEDIUM_DELAY_MS);
1795	<	}
1796	<	catch(InterruptedException success) {
1797	<	}
1791	>	public void await(CountDownLatch latch) {
1792	>	await(latch, LONG_DELAY_MS);
1793	>	}
1794	>
1795	>	public void await(Semaphore semaphore) {
1796	>	boolean timedOut = false;
1797	>	try {
1798	>	timedOut = !semaphore.tryAcquire(LONG_DELAY_MS, MILLISECONDS);
1799	>	} catch (Throwable fail) {
1800	>	threadUnexpectedException(fail);
1801		}
1802	+	if (timedOut)
1803	+	fail("timed out waiting for Semaphore for "
1804	+	+ (LONG_DELAY_MS/1000) + " sec");
1805		}
1806
1807	<	class LongPossiblyInterruptedRunnable implements Runnable {
1808	<	public void run() {
1809	<	try {
1810	<	Thread.sleep(LONG_DELAY_MS);
1811	<	}
482	<	catch(InterruptedException success) {
483	<	}
1807	>	public void await(CyclicBarrier barrier) {
1808	>	try {
1809	>	barrier.await(LONG_DELAY_MS, MILLISECONDS);
1810	>	} catch (Throwable fail) {
1811	>	threadUnexpectedException(fail);
1812		}
1813		}
1814
1815	+	//     /**
1816	+	//      * Spin-waits up to LONG_DELAY_MS until flag becomes true.
1817	+	//      */
1818	+	//     public void await(AtomicBoolean flag) {
1819	+	//         await(flag, LONG_DELAY_MS);
1820	+	//     }
1821	+
1822	+	//     /**
1823	+	//      * Spin-waits up to the specified timeout until flag becomes true.
1824	+	//      */
1825	+	//     public void await(AtomicBoolean flag, long timeoutMillis) {
1826	+	//         long startTime = System.nanoTime();
1827	+	//         while (!flag.get()) {
1828	+	//             if (millisElapsedSince(startTime) > timeoutMillis)
1829	+	//                 throw new AssertionError("timed out");
1830	+	//             Thread.yield();
1831	+	//         }
1832	+	//     }
1833	+
1834	+	public static class NPETask implements Callable<String> {
1835	+	public String call() { throw new NullPointerException(); }
1836	+	}
1837	+
1838	+	public Runnable possiblyInterruptedRunnable(final long timeoutMillis) {
1839	+	return new CheckedRunnable() {
1840	+	protected void realRun() {
1841	+	try {
1842	+	delay(timeoutMillis);
1843	+	} catch (InterruptedException ok) {}
1844	+	}};
1845	+	}
1846	+
1847		/**
1848		* For use as ThreadFactory in constructors
1849		*/
1850	<	static class SimpleThreadFactory implements ThreadFactory{
1851	<	public Thread newThread(Runnable r){
1850	>	public static class SimpleThreadFactory implements ThreadFactory {
1851	>	public Thread newThread(Runnable r) {
1852		return new Thread(r);
1853	<	}
1853	>	}
1854		}
1855
1856	<	static class TrackedShortRunnable implements Runnable {
1857	<	volatile boolean done = false;
1856	>	public interface TrackedRunnable extends Runnable {
1857	>	boolean isDone();
1858	>	}
1859	>
1860	>	public static class TrackedNoOpRunnable implements Runnable {
1861	>	public volatile boolean done = false;
1862		public void run() {
1863	+	done = true;
1864	+	}
1865	+	}
1866	+
1867	+	/**
1868	+	* Analog of CheckedRunnable for RecursiveAction
1869	+	*/
1870	+	public abstract class CheckedRecursiveAction extends RecursiveAction {
1871	+	protected abstract void realCompute() throws Throwable;
1872	+
1873	+	@Override protected final void compute() {
1874		try {
1875	<	Thread.sleep(SMALL_DELAY_MS);
1876	<	done = true;
1877	<	} catch(Exception e){
1875	>	realCompute();
1876	>	} catch (Throwable fail) {
1877	>	threadUnexpectedException(fail);
1878		}
1879		}
1880		}
1881
1882	<	static class TrackedMediumRunnable implements Runnable {
1883	<	volatile boolean done = false;
1884	<	public void run() {
1882	>	/**
1883	>	* Analog of CheckedCallable for RecursiveTask
1884	>	*/
1885	>	public abstract class CheckedRecursiveTask<T> extends RecursiveTask<T> {
1886	>	protected abstract T realCompute() throws Throwable;
1887	>
1888	>	@Override protected final T compute() {
1889		try {
1890	<	Thread.sleep(MEDIUM_DELAY_MS);
1891	<	done = true;
1892	<	} catch(Exception e){
1890	>	return realCompute();
1891	>	} catch (Throwable fail) {
1892	>	threadUnexpectedException(fail);
1893		}
1894	+	throw new AssertionError("unreached");
1895		}
1896		}
1897
1898	<	static class TrackedLongRunnable implements Runnable {
1899	<	volatile boolean done = false;
1900	<	public void run() {
1898	>	/**
1899	>	* For use as RejectedExecutionHandler in constructors
1900	>	*/
1901	>	public static class NoOpREHandler implements RejectedExecutionHandler {
1902	>	public void rejectedExecution(Runnable r,
1903	>	ThreadPoolExecutor executor) {}
1904	>	}
1905	>
1906	>	/**
1907	>	* A CyclicBarrier that uses timed await and fails with
1908	>	* AssertionErrors instead of throwing checked exceptions.
1909	>	*/
1910	>	public static class CheckedBarrier extends CyclicBarrier {
1911	>	public CheckedBarrier(int parties) { super(parties); }
1912	>
1913	>	public int await() {
1914		try {
1915	<	Thread.sleep(LONG_DELAY_MS);
1916	<	done = true;
1917	<	} catch(Exception e){
1915	>	return super.await(LONGER_DELAY_MS, MILLISECONDS);
1916	>	} catch (TimeoutException timedOut) {
1917	>	throw new AssertionError("timed out");
1918	>	} catch (Exception fail) {
1919	>	throw new AssertionError("Unexpected exception: " + fail, fail);
1920		}
1921		}
1922		}
1923
1924	<	static class TrackedNoOpRunnable implements Runnable {
1925	<	volatile boolean done = false;
1926	<	public void run() {
1927	<	done = true;
1924	>	void checkEmpty(BlockingQueue<?> q) {
1925	>	try {
1926	>	assertTrue(q.isEmpty());
1927	>	assertEquals(0, q.size());
1928	>	assertNull(q.peek());
1929	>	assertNull(q.poll());
1930	>	assertNull(q.poll(randomExpiredTimeout(), randomTimeUnit()));
1931	>	assertEquals(q.toString(), "[]");
1932	>	assertTrue(Arrays.equals(q.toArray(), new Object[0]));
1933	>	assertFalse(q.iterator().hasNext());
1934	>	try {
1935	>	q.element();
1936	>	shouldThrow();
1937	>	} catch (NoSuchElementException success) {}
1938	>	try {
1939	>	q.iterator().next();
1940	>	shouldThrow();
1941	>	} catch (NoSuchElementException success) {}
1942	>	try {
1943	>	q.remove();
1944	>	shouldThrow();
1945	>	} catch (NoSuchElementException success) {}
1946	>	} catch (InterruptedException fail) { threadUnexpectedException(fail); }
1947	>	}
1948	>
1949	>	void assertSerialEquals(Object x, Object y) {
1950	>	assertTrue(Arrays.equals(serialBytes(x), serialBytes(y)));
1951	>	}
1952	>
1953	>	void assertNotSerialEquals(Object x, Object y) {
1954	>	assertFalse(Arrays.equals(serialBytes(x), serialBytes(y)));
1955	>	}
1956	>
1957	>	byte[] serialBytes(Object o) {
1958	>	try {
1959	>	ByteArrayOutputStream bos = new ByteArrayOutputStream();
1960	>	ObjectOutputStream oos = new ObjectOutputStream(bos);
1961	>	oos.writeObject(o);
1962	>	oos.flush();
1963	>	oos.close();
1964	>	return bos.toByteArray();
1965	>	} catch (Throwable fail) {
1966	>	threadUnexpectedException(fail);
1967	>	return new byte[0];
1968	>	}
1969	>	}
1970	>
1971	>	@SuppressWarnings("unchecked")
1972	>	void assertImmutable(Object o) {
1973	>	if (o instanceof Collection) {
1974	>	assertThrows(
1975	>	UnsupportedOperationException.class,
1976	>	() -> ((Collection) o).add(null));
1977	>	}
1978	>	}
1979	>
1980	>	@SuppressWarnings("unchecked")
1981	>	<T> T serialClone(T o) {
1982	>	T clone = null;
1983	>	try {
1984	>	ObjectInputStream ois = new ObjectInputStream
1985	>	(new ByteArrayInputStream(serialBytes(o)));
1986	>	clone = (T) ois.readObject();
1987	>	} catch (Throwable fail) {
1988	>	threadUnexpectedException(fail);
1989		}
1990	+	if (o == clone) assertImmutable(o);
1991	+	else assertSame(o.getClass(), clone.getClass());
1992	+	return clone;
1993		}
1994
1995	<	static class TrackedCallable implements Callable {
1996	<	volatile boolean done = false;
1997	<	public Object call() {
1998	<	try {
1999	<	Thread.sleep(SMALL_DELAY_MS);
2000	<	done = true;
2001	<	} catch(Exception e){
1995	>	/**
1996	>	* A version of serialClone that leaves error handling (for
1997	>	* e.g. NotSerializableException) up to the caller.
1998	>	*/
1999	>	@SuppressWarnings("unchecked")
2000	>	<T> T serialClonePossiblyFailing(T o)
2001	>	throws ReflectiveOperationException, java.io.IOException {
2002	>	ByteArrayOutputStream bos = new ByteArrayOutputStream();
2003	>	ObjectOutputStream oos = new ObjectOutputStream(bos);
2004	>	oos.writeObject(o);
2005	>	oos.flush();
2006	>	oos.close();
2007	>	ObjectInputStream ois = new ObjectInputStream
2008	>	(new ByteArrayInputStream(bos.toByteArray()));
2009	>	T clone = (T) ois.readObject();
2010	>	if (o == clone) assertImmutable(o);
2011	>	else assertSame(o.getClass(), clone.getClass());
2012	>	return clone;
2013	>	}
2014	>
2015	>	/**
2016	>	* If o implements Cloneable and has a public clone method,
2017	>	* returns a clone of o, else null.
2018	>	*/
2019	>	@SuppressWarnings("unchecked")
2020	>	<T> T cloneableClone(T o) {
2021	>	if (!(o instanceof Cloneable)) return null;
2022	>	final T clone;
2023	>	try {
2024	>	clone = (T) o.getClass().getMethod("clone").invoke(o);
2025	>	} catch (NoSuchMethodException ok) {
2026	>	return null;
2027	>	} catch (ReflectiveOperationException unexpected) {
2028	>	throw new Error(unexpected);
2029	>	}
2030	>	assertNotSame(o, clone); // not 100% guaranteed by spec
2031	>	assertSame(o.getClass(), clone.getClass());
2032	>	return clone;
2033	>	}
2034	>
2035	>	public void assertThrows(Class<? extends Throwable> expectedExceptionClass,
2036	>	Action... throwingActions) {
2037	>	for (Action throwingAction : throwingActions) {
2038	>	boolean threw = false;
2039	>	try { throwingAction.run(); }
2040	>	catch (Throwable t) {
2041	>	threw = true;
2042	>	if (!expectedExceptionClass.isInstance(t))
2043	>	throw new AssertionError(
2044	>	"Expected " + expectedExceptionClass.getName() +
2045	>	", got " + t.getClass().getName(),
2046	>	t);
2047		}
2048	<	return Boolean.TRUE;
2048	>	if (!threw)
2049	>	shouldThrow(expectedExceptionClass.getName());
2050		}
2051		}
2052
2053	+	public void assertIteratorExhausted(Iterator<?> it) {
2054	+	try {
2055	+	it.next();
2056	+	shouldThrow();
2057	+	} catch (NoSuchElementException success) {}
2058	+	assertFalse(it.hasNext());
2059	+	}
2060	+
2061	+	public <T> Callable<T> callableThrowing(final Exception ex) {
2062	+	return new Callable<T>() { public T call() throws Exception { throw ex; }};
2063	+	}
2064	+
2065	+	public Runnable runnableThrowing(final RuntimeException ex) {
2066	+	return new Runnable() { public void run() { throw ex; }};
2067	+	}
2068	+
2069	+	/** A reusable thread pool to be shared by tests. */
2070	+	static final ExecutorService cachedThreadPool =
2071	+	new ThreadPoolExecutor(0, Integer.MAX_VALUE,
2072	+	1000L, MILLISECONDS,
2073	+	new SynchronousQueue<Runnable>());
2074	+
2075	+	static <T> void shuffle(T[] array) {
2076	+	Collections.shuffle(Arrays.asList(array), ThreadLocalRandom.current());
2077	+	}
2078
2079		/**
2080	<	* For use as RejectedExecutionHandler in constructors
2080	>	* Returns the same String as would be returned by {@link
2081	>	* Object#toString}, whether or not the given object's class
2082	>	* overrides toString().
2083	>	*
2084	>	* @see System#identityHashCode
2085	>	*/
2086	>	static String identityString(Object x) {
2087	>	return x.getClass().getName()
2088	>	+ "@" + Integer.toHexString(System.identityHashCode(x));
2089	>	}
2090	>
2091	>	// --- Shared assertions for Executor tests ---
2092	>
2093	>	/**
2094	>	* Returns maximum number of tasks that can be submitted to given
2095	>	* pool (with bounded queue) before saturation (when submission
2096	>	* throws RejectedExecutionException).
2097		*/
2098	<	static class NoOpREHandler implements RejectedExecutionHandler{
2099	<	public void rejectedExecution(Runnable r, ThreadPoolExecutor executor){}
2098	>	static final int saturatedSize(ThreadPoolExecutor pool) {
2099	>	BlockingQueue<Runnable> q = pool.getQueue();
2100	>	return pool.getMaximumPoolSize() + q.size() + q.remainingCapacity();
2101	>	}
2102	>
2103	>	@SuppressWarnings("FutureReturnValueIgnored")
2104	>	void assertNullTaskSubmissionThrowsNullPointerException(Executor e) {
2105	>	try {
2106	>	e.execute((Runnable) null);
2107	>	shouldThrow();
2108	>	} catch (NullPointerException success) {}
2109	>
2110	>	if (! (e instanceof ExecutorService)) return;
2111	>	ExecutorService es = (ExecutorService) e;
2112	>	try {
2113	>	es.submit((Runnable) null);
2114	>	shouldThrow();
2115	>	} catch (NullPointerException success) {}
2116	>	try {
2117	>	es.submit((Runnable) null, Boolean.TRUE);
2118	>	shouldThrow();
2119	>	} catch (NullPointerException success) {}
2120	>	try {
2121	>	es.submit((Callable<?>) null);
2122	>	shouldThrow();
2123	>	} catch (NullPointerException success) {}
2124	>
2125	>	if (! (e instanceof ScheduledExecutorService)) return;
2126	>	ScheduledExecutorService ses = (ScheduledExecutorService) e;
2127	>	try {
2128	>	ses.schedule((Runnable) null,
2129	>	randomTimeout(), randomTimeUnit());
2130	>	shouldThrow();
2131	>	} catch (NullPointerException success) {}
2132	>	try {
2133	>	ses.schedule((Callable<?>) null,
2134	>	randomTimeout(), randomTimeUnit());
2135	>	shouldThrow();
2136	>	} catch (NullPointerException success) {}
2137	>	try {
2138	>	ses.scheduleAtFixedRate((Runnable) null,
2139	>	randomTimeout(), LONG_DELAY_MS, MILLISECONDS);
2140	>	shouldThrow();
2141	>	} catch (NullPointerException success) {}
2142	>	try {
2143	>	ses.scheduleWithFixedDelay((Runnable) null,
2144	>	randomTimeout(), LONG_DELAY_MS, MILLISECONDS);
2145	>	shouldThrow();
2146	>	} catch (NullPointerException success) {}
2147	>	}
2148	>
2149	>	void setRejectedExecutionHandler(
2150	>	ThreadPoolExecutor p, RejectedExecutionHandler handler) {
2151	>	p.setRejectedExecutionHandler(handler);
2152	>	assertSame(handler, p.getRejectedExecutionHandler());
2153	>	}
2154	>
2155	>	void assertTaskSubmissionsAreRejected(ThreadPoolExecutor p) {
2156	>	final RejectedExecutionHandler savedHandler = p.getRejectedExecutionHandler();
2157	>	final long savedTaskCount = p.getTaskCount();
2158	>	final long savedCompletedTaskCount = p.getCompletedTaskCount();
2159	>	final int savedQueueSize = p.getQueue().size();
2160	>	final boolean stock = (p.getClass().getClassLoader() == null);
2161	>
2162	>	Runnable r = () -> {};
2163	>	Callable<Boolean> c = () -> Boolean.TRUE;
2164	>
2165	>	class Recorder implements RejectedExecutionHandler {
2166	>	public volatile Runnable r = null;
2167	>	public volatile ThreadPoolExecutor p = null;
2168	>	public void reset() { r = null; p = null; }
2169	>	public void rejectedExecution(Runnable r, ThreadPoolExecutor p) {
2170	>	assertNull(this.r);
2171	>	assertNull(this.p);
2172	>	this.r = r;
2173	>	this.p = p;
2174	>	}
2175	>	}
2176	>
2177	>	// check custom handler is invoked exactly once per task
2178	>	Recorder recorder = new Recorder();
2179	>	setRejectedExecutionHandler(p, recorder);
2180	>	for (int i = 2; i--> 0; ) {
2181	>	recorder.reset();
2182	>	p.execute(r);
2183	>	if (stock && p.getClass() == ThreadPoolExecutor.class)
2184	>	assertSame(r, recorder.r);
2185	>	assertSame(p, recorder.p);
2186	>
2187	>	recorder.reset();
2188	>	assertFalse(p.submit(r).isDone());
2189	>	if (stock) assertTrue(!((FutureTask) recorder.r).isDone());
2190	>	assertSame(p, recorder.p);
2191	>
2192	>	recorder.reset();
2193	>	assertFalse(p.submit(r, Boolean.TRUE).isDone());
2194	>	if (stock) assertTrue(!((FutureTask) recorder.r).isDone());
2195	>	assertSame(p, recorder.p);
2196	>
2197	>	recorder.reset();
2198	>	assertFalse(p.submit(c).isDone());
2199	>	if (stock) assertTrue(!((FutureTask) recorder.r).isDone());
2200	>	assertSame(p, recorder.p);
2201	>
2202	>	if (p instanceof ScheduledExecutorService) {
2203	>	ScheduledExecutorService s = (ScheduledExecutorService) p;
2204	>	ScheduledFuture<?> future;
2205	>
2206	>	recorder.reset();
2207	>	future = s.schedule(r, randomTimeout(), randomTimeUnit());
2208	>	assertFalse(future.isDone());
2209	>	if (stock) assertTrue(!((FutureTask) recorder.r).isDone());
2210	>	assertSame(p, recorder.p);
2211	>
2212	>	recorder.reset();
2213	>	future = s.schedule(c, randomTimeout(), randomTimeUnit());
2214	>	assertFalse(future.isDone());
2215	>	if (stock) assertTrue(!((FutureTask) recorder.r).isDone());
2216	>	assertSame(p, recorder.p);
2217	>
2218	>	recorder.reset();
2219	>	future = s.scheduleAtFixedRate(r, randomTimeout(), LONG_DELAY_MS, MILLISECONDS);
2220	>	assertFalse(future.isDone());
2221	>	if (stock) assertTrue(!((FutureTask) recorder.r).isDone());
2222	>	assertSame(p, recorder.p);
2223	>
2224	>	recorder.reset();
2225	>	future = s.scheduleWithFixedDelay(r, randomTimeout(), LONG_DELAY_MS, MILLISECONDS);
2226	>	assertFalse(future.isDone());
2227	>	if (stock) assertTrue(!((FutureTask) recorder.r).isDone());
2228	>	assertSame(p, recorder.p);
2229	>	}
2230	>	}
2231	>
2232	>	// Checking our custom handler above should be sufficient, but
2233	>	// we add some integration tests of standard handlers.
2234	>	final AtomicReference<Thread> thread = new AtomicReference<>();
2235	>	final Runnable setThread = () -> thread.set(Thread.currentThread());
2236	>
2237	>	setRejectedExecutionHandler(p, new ThreadPoolExecutor.AbortPolicy());
2238	>	try {
2239	>	p.execute(setThread);
2240	>	shouldThrow();
2241	>	} catch (RejectedExecutionException success) {}
2242	>	assertNull(thread.get());
2243	>
2244	>	setRejectedExecutionHandler(p, new ThreadPoolExecutor.DiscardPolicy());
2245	>	p.execute(setThread);
2246	>	assertNull(thread.get());
2247	>
2248	>	setRejectedExecutionHandler(p, new ThreadPoolExecutor.CallerRunsPolicy());
2249	>	p.execute(setThread);
2250	>	if (p.isShutdown())
2251	>	assertNull(thread.get());
2252	>	else
2253	>	assertSame(Thread.currentThread(), thread.get());
2254	>
2255	>	setRejectedExecutionHandler(p, savedHandler);
2256	>
2257	>	// check that pool was not perturbed by handlers
2258	>	assertEquals(savedTaskCount, p.getTaskCount());
2259	>	assertEquals(savedCompletedTaskCount, p.getCompletedTaskCount());
2260	>	assertEquals(savedQueueSize, p.getQueue().size());
2261	>	}
2262	>
2263	>	void assertCollectionsEquals(Collection<?> x, Collection<?> y) {
2264	>	assertEquals(x, y);
2265	>	assertEquals(y, x);
2266	>	assertEquals(x.isEmpty(), y.isEmpty());
2267	>	assertEquals(x.size(), y.size());
2268	>	if (x instanceof List) {
2269	>	assertEquals(x.toString(), y.toString());
2270	>	}
2271	>	if (x instanceof List || x instanceof Set) {
2272	>	assertEquals(x.hashCode(), y.hashCode());
2273	>	}
2274	>	if (x instanceof List || x instanceof Deque) {
2275	>	assertTrue(Arrays.equals(x.toArray(), y.toArray()));
2276	>	assertTrue(Arrays.equals(x.toArray(new Object[0]),
2277	>	y.toArray(new Object[0])));
2278	>	}
2279	>	}
2280	>
2281	>	/**
2282	>	* A weaker form of assertCollectionsEquals which does not insist
2283	>	* that the two collections satisfy Object#equals(Object), since
2284	>	* they may use identity semantics as Deques do.
2285	>	*/
2286	>	void assertCollectionsEquivalent(Collection<?> x, Collection<?> y) {
2287	>	if (x instanceof List || x instanceof Set)
2288	>	assertCollectionsEquals(x, y);
2289	>	else {
2290	>	assertEquals(x.isEmpty(), y.isEmpty());
2291	>	assertEquals(x.size(), y.size());
2292	>	assertEquals(new HashSet<Object>(x), new HashSet<Object>(y));
2293	>	if (x instanceof Deque) {
2294	>	assertTrue(Arrays.equals(x.toArray(), y.toArray()));
2295	>	assertTrue(Arrays.equals(x.toArray(new Object[0]),
2296	>	y.toArray(new Object[0])));
2297	>	}
2298	>	}
2299		}
555	–
556	–
2300		}

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