1 /*
2 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
3 *
4 * This code is free software; you can redistribute it and/or modify it
5 * under the terms of the GNU General Public License version 2 only, as
6 * published by the Free Software Foundation.
7 *
8 * This code is distributed in the hope that it will be useful, but WITHOUT
9 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
10 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
11 * version 2 for more details (a copy is included in the LICENSE file that
12 * accompanied this code).
13 *
14 * You should have received a copy of the GNU General Public License version
15 * 2 along with this work; if not, write to the Free Software Foundation,
16 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
17 *
18 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
19 * or visit www.oracle.com if you need additional information or have any
20 * questions.
21 */
22
23 /*
24 * This file is available under and governed by the GNU General Public
25 * License version 2 only, as published by the Free Software Foundation.
26 * However, the following notice accompanied the original version of this
27 * file:
28 *
29 * Written by Doug Lea and Martin Buchholz with assistance from
30 * members of JCP JSR-166 Expert Group and released to the public
31 * domain, as explained at
32 * http://creativecommons.org/publicdomain/zero/1.0/
33 * Other contributors include Andrew Wright, Jeffrey Hayes,
34 * Pat Fisher, Mike Judd.
35 */
36
37 /*
38 * @test
39 * @summary JSR-166 tck tests, in a number of variations.
40 * The first is the conformance testing variant,
41 * while others also test implementation details.
42 * @build *
43 * @modules java.management
44 * @run junit/othervm/timeout=1000 JSR166TestCase
45 * @run junit/othervm/timeout=1000
46 * --add-opens java.base/java.util.concurrent=ALL-UNNAMED
47 * --add-opens java.base/java.lang=ALL-UNNAMED
48 * -Djsr166.testImplementationDetails=true
49 * JSR166TestCase
50 * @run junit/othervm/timeout=1000
51 * --add-opens java.base/java.util.concurrent=ALL-UNNAMED
52 * --add-opens java.base/java.lang=ALL-UNNAMED
53 * -Djsr166.testImplementationDetails=true
54 * -Djava.util.concurrent.ForkJoinPool.common.parallelism=0
55 * JSR166TestCase
56 * @run junit/othervm/timeout=1000
57 * --add-opens java.base/java.util.concurrent=ALL-UNNAMED
58 * --add-opens java.base/java.lang=ALL-UNNAMED
59 * -Djsr166.testImplementationDetails=true
60 * -Djava.util.concurrent.ForkJoinPool.common.parallelism=1
61 * -Djava.util.secureRandomSeed=true
62 * JSR166TestCase
63 * @run junit/othervm/timeout=1000/policy=tck.policy
64 * --add-opens java.base/java.util.concurrent=ALL-UNNAMED
65 * --add-opens java.base/java.lang=ALL-UNNAMED
66 * -Djsr166.testImplementationDetails=true
67 * JSR166TestCase
68 */
69
70 import static java.util.concurrent.TimeUnit.MILLISECONDS;
71 import static java.util.concurrent.TimeUnit.MINUTES;
72 import static java.util.concurrent.TimeUnit.NANOSECONDS;
73
74 import java.io.ByteArrayInputStream;
75 import java.io.ByteArrayOutputStream;
76 import java.io.ObjectInputStream;
77 import java.io.ObjectOutputStream;
78 import java.lang.management.ManagementFactory;
79 import java.lang.management.ThreadInfo;
80 import java.lang.management.ThreadMXBean;
81 import java.lang.reflect.Constructor;
82 import java.lang.reflect.Method;
83 import java.lang.reflect.Modifier;
84 import java.security.CodeSource;
85 import java.security.Permission;
86 import java.security.PermissionCollection;
87 import java.security.Permissions;
88 import java.security.Policy;
89 import java.security.ProtectionDomain;
90 import java.security.SecurityPermission;
91 import java.util.ArrayList;
92 import java.util.Arrays;
93 import java.util.Collection;
94 import java.util.Collections;
95 import java.util.Date;
96 import java.util.Deque;
97 import java.util.Enumeration;
98 import java.util.HashSet;
99 import java.util.Iterator;
100 import java.util.List;
101 import java.util.NoSuchElementException;
102 import java.util.PropertyPermission;
103 import java.util.Set;
104 import java.util.concurrent.BlockingQueue;
105 import java.util.concurrent.Callable;
106 import java.util.concurrent.CountDownLatch;
107 import java.util.concurrent.CyclicBarrier;
108 import java.util.concurrent.ExecutionException;
109 import java.util.concurrent.Executor;
110 import java.util.concurrent.Executors;
111 import java.util.concurrent.ExecutorService;
112 import java.util.concurrent.ForkJoinPool;
113 import java.util.concurrent.Future;
114 import java.util.concurrent.FutureTask;
115 import java.util.concurrent.RecursiveAction;
116 import java.util.concurrent.RecursiveTask;
117 import java.util.concurrent.RejectedExecutionException;
118 import java.util.concurrent.RejectedExecutionHandler;
119 import java.util.concurrent.Semaphore;
120 import java.util.concurrent.ScheduledExecutorService;
121 import java.util.concurrent.ScheduledFuture;
122 import java.util.concurrent.SynchronousQueue;
123 import java.util.concurrent.ThreadFactory;
124 import java.util.concurrent.ThreadLocalRandom;
125 import java.util.concurrent.ThreadPoolExecutor;
126 import java.util.concurrent.TimeUnit;
127 import java.util.concurrent.TimeoutException;
128 import java.util.concurrent.atomic.AtomicBoolean;
129 import java.util.concurrent.atomic.AtomicReference;
130 import java.util.regex.Pattern;
131
132 import junit.framework.Test;
133 import junit.framework.TestCase;
134 import junit.framework.TestResult;
135 import junit.framework.TestSuite;
136
137 /**
138 * Base class for JSR166 Junit TCK tests. Defines some constants,
139 * utility methods and classes, as well as a simple framework for
140 * helping to make sure that assertions failing in generated threads
141 * cause the associated test that generated them to itself fail (which
142 * JUnit does not otherwise arrange). The rules for creating such
143 * tests are:
144 *
145 * <ol>
146 *
147 * <li>All assertions in code running in generated threads must use
148 * the forms {@link #threadFail}, {@link #threadAssertTrue}, {@link
149 * #threadAssertEquals}, or {@link #threadAssertNull}, (not
150 * {@code fail}, {@code assertTrue}, etc.) It is OK (but not
151 * particularly recommended) for other code to use these forms too.
152 * Only the most typically used JUnit assertion methods are defined
153 * this way, but enough to live with.
154 *
155 * <li>If you override {@link #setUp} or {@link #tearDown}, make sure
156 * to invoke {@code super.setUp} and {@code super.tearDown} within
157 * them. These methods are used to clear and check for thread
158 * assertion failures.
159 *
160 * <li>All delays and timeouts must use one of the constants {@code
161 * SHORT_DELAY_MS}, {@code SMALL_DELAY_MS}, {@code MEDIUM_DELAY_MS},
162 * {@code LONG_DELAY_MS}. The idea here is that a SHORT is always
163 * discriminable from zero time, and always allows enough time for the
164 * small amounts of computation (creating a thread, calling a few
165 * methods, etc) needed to reach a timeout point. Similarly, a SMALL
166 * is always discriminable as larger than SHORT and smaller than
167 * MEDIUM. And so on. These constants are set to conservative values,
168 * but even so, if there is ever any doubt, they can all be increased
169 * in one spot to rerun tests on slower platforms.
170 *
171 * <li>All threads generated must be joined inside each test case
172 * method (or {@code fail} to do so) before returning from the
173 * method. The {@code joinPool} method can be used to do this when
174 * using Executors.
175 *
176 * </ol>
177 *
178 * <p><b>Other notes</b>
179 * <ul>
180 *
181 * <li>Usually, there is one testcase method per JSR166 method
182 * covering "normal" operation, and then as many exception-testing
183 * methods as there are exceptions the method can throw. Sometimes
184 * there are multiple tests per JSR166 method when the different
185 * "normal" behaviors differ significantly. And sometimes testcases
186 * cover multiple methods when they cannot be tested in isolation.
187 *
188 * <li>The documentation style for testcases is to provide as javadoc
189 * a simple sentence or two describing the property that the testcase
190 * method purports to test. The javadocs do not say anything about how
191 * the property is tested. To find out, read the code.
192 *
193 * <li>These tests are "conformance tests", and do not attempt to
194 * test throughput, latency, scalability or other performance factors
195 * (see the separate "jtreg" tests for a set intended to check these
196 * for the most central aspects of functionality.) So, most tests use
197 * the smallest sensible numbers of threads, collection sizes, etc
198 * needed to check basic conformance.
199 *
200 * <li>The test classes currently do not declare inclusion in
201 * any particular package to simplify things for people integrating
202 * them in TCK test suites.
203 *
204 * <li>As a convenience, the {@code main} of this class (JSR166TestCase)
205 * runs all JSR166 unit tests.
206 *
207 * </ul>
208 */
209 public class JSR166TestCase extends TestCase {
210 private static final boolean useSecurityManager =
211 Boolean.getBoolean("jsr166.useSecurityManager");
212
213 protected static final boolean expensiveTests =
214 Boolean.getBoolean("jsr166.expensiveTests");
215
216 /**
217 * If true, also run tests that are not part of the official tck
218 * because they test unspecified implementation details.
219 */
220 protected static final boolean testImplementationDetails =
221 Boolean.getBoolean("jsr166.testImplementationDetails");
222
223 /**
224 * If true, report on stdout all "slow" tests, that is, ones that
225 * take more than profileThreshold milliseconds to execute.
226 */
227 private static final boolean profileTests =
228 Boolean.getBoolean("jsr166.profileTests");
229
230 /**
231 * The number of milliseconds that tests are permitted for
232 * execution without being reported, when profileTests is set.
233 */
234 private static final long profileThreshold =
235 Long.getLong("jsr166.profileThreshold", 100);
236
237 /**
238 * The number of repetitions per test (for tickling rare bugs).
239 */
240 private static final int runsPerTest =
241 Integer.getInteger("jsr166.runsPerTest", 1);
242
243 /**
244 * The number of repetitions of the test suite (for finding leaks?).
245 */
246 private static final int suiteRuns =
247 Integer.getInteger("jsr166.suiteRuns", 1);
248
249 /**
250 * Returns the value of the system property, or NaN if not defined.
251 */
252 private static float systemPropertyValue(String name) {
253 String floatString = System.getProperty(name);
254 if (floatString == null)
255 return Float.NaN;
256 try {
257 return Float.parseFloat(floatString);
258 } catch (NumberFormatException ex) {
259 throw new IllegalArgumentException(
260 String.format("Bad float value in system property %s=%s",
261 name, floatString));
262 }
263 }
264
265 /**
266 * The scaling factor to apply to standard delays used in tests.
267 * May be initialized from any of:
268 * - the "jsr166.delay.factor" system property
269 * - the "test.timeout.factor" system property (as used by jtreg)
270 * See: http://openjdk.java.net/jtreg/tag-spec.html
271 * - hard-coded fuzz factor when using a known slowpoke VM
272 */
273 private static final float delayFactor = delayFactor();
274
275 private static float delayFactor() {
276 float x;
277 if (!Float.isNaN(x = systemPropertyValue("jsr166.delay.factor")))
278 return x;
279 if (!Float.isNaN(x = systemPropertyValue("test.timeout.factor")))
280 return x;
281 String prop = System.getProperty("java.vm.version");
282 if (prop != null && prop.matches(".*debug.*"))
283 return 4.0f; // How much slower is fastdebug than product?!
284 return 1.0f;
285 }
286
287 public JSR166TestCase() { super(); }
288 public JSR166TestCase(String name) { super(name); }
289
290 /**
291 * A filter for tests to run, matching strings of the form
292 * methodName(className), e.g. "testInvokeAll5(ForkJoinPoolTest)"
293 * Usefully combined with jsr166.runsPerTest.
294 */
295 private static final Pattern methodFilter = methodFilter();
296
297 private static Pattern methodFilter() {
298 String regex = System.getProperty("jsr166.methodFilter");
299 return (regex == null) ? null : Pattern.compile(regex);
300 }
301
302 // Instrumentation to debug very rare, but very annoying hung test runs.
303 static volatile TestCase currentTestCase;
304 // static volatile int currentRun = 0;
305 static {
306 Runnable checkForWedgedTest = new Runnable() { public void run() {
307 // Avoid spurious reports with enormous runsPerTest.
308 // A single test case run should never take more than 1 second.
309 // But let's cap it at the high end too ...
310 final int timeoutMinutes =
311 Math.min(15, Math.max(runsPerTest / 60, 1));
312 for (TestCase lastTestCase = currentTestCase;;) {
313 try { MINUTES.sleep(timeoutMinutes); }
314 catch (InterruptedException unexpected) { break; }
315 if (lastTestCase == currentTestCase) {
316 System.err.printf(
317 "Looks like we're stuck running test: %s%n",
318 lastTestCase);
319 // System.err.printf(
320 // "Looks like we're stuck running test: %s (%d/%d)%n",
321 // lastTestCase, currentRun, runsPerTest);
322 // System.err.println("availableProcessors=" +
323 // Runtime.getRuntime().availableProcessors());
324 // System.err.printf("cpu model = %s%n", cpuModel());
325 dumpTestThreads();
326 // one stack dump is probably enough; more would be spam
327 break;
328 }
329 lastTestCase = currentTestCase;
330 }}};
331 Thread thread = new Thread(checkForWedgedTest, "checkForWedgedTest");
332 thread.setDaemon(true);
333 thread.start();
334 }
335
336 // public static String cpuModel() {
337 // try {
338 // java.util.regex.Matcher matcher
339 // = Pattern.compile("model name\\s*: (.*)")
340 // .matcher(new String(
341 // java.nio.file.Files.readAllBytes(
342 // java.nio.file.Paths.get("/proc/cpuinfo")), "UTF-8"));
343 // matcher.find();
344 // return matcher.group(1);
345 // } catch (Exception ex) { return null; }
346 // }
347
348 public void runBare() throws Throwable {
349 currentTestCase = this;
350 if (methodFilter == null
351 || methodFilter.matcher(toString()).find())
352 super.runBare();
353 }
354
355 protected void runTest() throws Throwable {
356 for (int i = 0; i < runsPerTest; i++) {
357 // currentRun = i;
358 if (profileTests)
359 runTestProfiled();
360 else
361 super.runTest();
362 }
363 }
364
365 protected void runTestProfiled() throws Throwable {
366 for (int i = 0; i < 2; i++) {
367 long startTime = System.nanoTime();
368 super.runTest();
369 long elapsedMillis = millisElapsedSince(startTime);
370 if (elapsedMillis < profileThreshold)
371 break;
372 // Never report first run of any test; treat it as a
373 // warmup run, notably to trigger all needed classloading,
374 if (i > 0)
375 System.out.printf("%n%s: %d%n", toString(), elapsedMillis);
376 }
377 }
378
379 /**
380 * Runs all JSR166 unit tests using junit.textui.TestRunner.
381 */
382 public static void main(String[] args) {
383 main(suite(), args);
384 }
385
386 static class PithyResultPrinter extends junit.textui.ResultPrinter {
387 PithyResultPrinter(java.io.PrintStream writer) { super(writer); }
388 long runTime;
389 public void startTest(Test test) {}
390 protected void printHeader(long runTime) {
391 this.runTime = runTime; // defer printing for later
392 }
393 protected void printFooter(TestResult result) {
394 if (result.wasSuccessful()) {
395 getWriter().println("OK (" + result.runCount() + " tests)"
396 + " Time: " + elapsedTimeAsString(runTime));
397 } else {
398 getWriter().println("Time: " + elapsedTimeAsString(runTime));
399 super.printFooter(result);
400 }
401 }
402 }
403
404 /**
405 * Returns a TestRunner that doesn't bother with unnecessary
406 * fluff, like printing a "." for each test case.
407 */
408 static junit.textui.TestRunner newPithyTestRunner() {
409 junit.textui.TestRunner runner = new junit.textui.TestRunner();
410 runner.setPrinter(new PithyResultPrinter(System.out));
411 return runner;
412 }
413
414 /**
415 * Runs all unit tests in the given test suite.
416 * Actual behavior influenced by jsr166.* system properties.
417 */
418 static void main(Test suite, String[] args) {
419 if (useSecurityManager) {
420 System.err.println("Setting a permissive security manager");
421 Policy.setPolicy(permissivePolicy());
422 System.setSecurityManager(new SecurityManager());
423 }
424 for (int i = 0; i < suiteRuns; i++) {
425 TestResult result = newPithyTestRunner().doRun(suite);
426 if (!result.wasSuccessful())
427 System.exit(1);
428 System.gc();
429 System.runFinalization();
430 }
431 }
432
433 public static TestSuite newTestSuite(Object... suiteOrClasses) {
434 TestSuite suite = new TestSuite();
435 for (Object suiteOrClass : suiteOrClasses) {
436 if (suiteOrClass instanceof TestSuite)
437 suite.addTest((TestSuite) suiteOrClass);
438 else if (suiteOrClass instanceof Class)
439 suite.addTest(new TestSuite((Class<?>) suiteOrClass));
440 else
441 throw new ClassCastException("not a test suite or class");
442 }
443 return suite;
444 }
445
446 public static void addNamedTestClasses(TestSuite suite,
447 String... testClassNames) {
448 for (String testClassName : testClassNames) {
449 try {
450 Class<?> testClass = Class.forName(testClassName);
451 Method m = testClass.getDeclaredMethod("suite");
452 suite.addTest(newTestSuite((Test)m.invoke(null)));
453 } catch (ReflectiveOperationException e) {
454 throw new AssertionError("Missing test class", e);
455 }
456 }
457 }
458
459 public static final double JAVA_CLASS_VERSION;
460 public static final String JAVA_SPECIFICATION_VERSION;
461 static {
462 try {
463 JAVA_CLASS_VERSION = java.security.AccessController.doPrivileged(
464 new java.security.PrivilegedAction<Double>() {
465 public Double run() {
466 return Double.valueOf(System.getProperty("java.class.version"));}});
467 JAVA_SPECIFICATION_VERSION = java.security.AccessController.doPrivileged(
468 new java.security.PrivilegedAction<String>() {
469 public String run() {
470 return System.getProperty("java.specification.version");}});
471 } catch (Throwable t) {
472 throw new Error(t);
473 }
474 }
475
476 public static boolean atLeastJava6() { return JAVA_CLASS_VERSION >= 50.0; }
477 public static boolean atLeastJava7() { return JAVA_CLASS_VERSION >= 51.0; }
478 public static boolean atLeastJava8() { return JAVA_CLASS_VERSION >= 52.0; }
479 public static boolean atLeastJava9() { return JAVA_CLASS_VERSION >= 53.0; }
480 public static boolean atLeastJava10() { return JAVA_CLASS_VERSION >= 54.0; }
481 public static boolean atLeastJava11() { return JAVA_CLASS_VERSION >= 55.0; }
482
483 /**
484 * Collects all JSR166 unit tests as one suite.
485 */
486 public static Test suite() {
487 // Java7+ test classes
488 TestSuite suite = newTestSuite(
489 ForkJoinPoolTest.suite(),
490 ForkJoinTaskTest.suite(),
491 RecursiveActionTest.suite(),
492 RecursiveTaskTest.suite(),
493 LinkedTransferQueueTest.suite(),
494 PhaserTest.suite(),
495 ThreadLocalRandomTest.suite(),
496 AbstractExecutorServiceTest.suite(),
497 AbstractQueueTest.suite(),
498 AbstractQueuedSynchronizerTest.suite(),
499 AbstractQueuedLongSynchronizerTest.suite(),
500 ArrayBlockingQueueTest.suite(),
501 ArrayDequeTest.suite(),
502 ArrayListTest.suite(),
503 AtomicBooleanTest.suite(),
504 AtomicIntegerArrayTest.suite(),
505 AtomicIntegerFieldUpdaterTest.suite(),
506 AtomicIntegerTest.suite(),
507 AtomicLongArrayTest.suite(),
508 AtomicLongFieldUpdaterTest.suite(),
509 AtomicLongTest.suite(),
510 AtomicMarkableReferenceTest.suite(),
511 AtomicReferenceArrayTest.suite(),
512 AtomicReferenceFieldUpdaterTest.suite(),
513 AtomicReferenceTest.suite(),
514 AtomicStampedReferenceTest.suite(),
515 ConcurrentHashMapTest.suite(),
516 ConcurrentLinkedDequeTest.suite(),
517 ConcurrentLinkedQueueTest.suite(),
518 ConcurrentSkipListMapTest.suite(),
519 ConcurrentSkipListSubMapTest.suite(),
520 ConcurrentSkipListSetTest.suite(),
521 ConcurrentSkipListSubSetTest.suite(),
522 CopyOnWriteArrayListTest.suite(),
523 CopyOnWriteArraySetTest.suite(),
524 CountDownLatchTest.suite(),
525 CountedCompleterTest.suite(),
526 CyclicBarrierTest.suite(),
527 DelayQueueTest.suite(),
528 EntryTest.suite(),
529 ExchangerTest.suite(),
530 ExecutorsTest.suite(),
531 ExecutorCompletionServiceTest.suite(),
532 FutureTaskTest.suite(),
533 LinkedBlockingDequeTest.suite(),
534 LinkedBlockingQueueTest.suite(),
535 LinkedListTest.suite(),
536 LockSupportTest.suite(),
537 PriorityBlockingQueueTest.suite(),
538 PriorityQueueTest.suite(),
539 ReentrantLockTest.suite(),
540 ReentrantReadWriteLockTest.suite(),
541 ScheduledExecutorTest.suite(),
542 ScheduledExecutorSubclassTest.suite(),
543 SemaphoreTest.suite(),
544 SynchronousQueueTest.suite(),
545 SystemTest.suite(),
546 ThreadLocalTest.suite(),
547 ThreadPoolExecutorTest.suite(),
548 ThreadPoolExecutorSubclassTest.suite(),
549 ThreadTest.suite(),
550 TimeUnitTest.suite(),
551 TreeMapTest.suite(),
552 TreeSetTest.suite(),
553 TreeSubMapTest.suite(),
554 TreeSubSetTest.suite(),
555 VectorTest.suite());
556
557 // Java8+ test classes
558 if (atLeastJava8()) {
559 String[] java8TestClassNames = {
560 "ArrayDeque8Test",
561 "Atomic8Test",
562 "CompletableFutureTest",
563 "ConcurrentHashMap8Test",
564 "CountedCompleter8Test",
565 "DoubleAccumulatorTest",
566 "DoubleAdderTest",
567 "ForkJoinPool8Test",
568 "ForkJoinTask8Test",
569 "HashMapTest",
570 "LinkedBlockingDeque8Test",
571 "LinkedBlockingQueue8Test",
572 "LongAccumulatorTest",
573 "LongAdderTest",
574 "SplittableRandomTest",
575 "StampedLockTest",
576 "SubmissionPublisherTest",
577 "ThreadLocalRandom8Test",
578 "TimeUnit8Test",
579 };
580 addNamedTestClasses(suite, java8TestClassNames);
581 }
582
583 // Java9+ test classes
584 if (atLeastJava9()) {
585 String[] java9TestClassNames = {
586 "AtomicBoolean9Test",
587 "AtomicInteger9Test",
588 "AtomicIntegerArray9Test",
589 "AtomicLong9Test",
590 "AtomicLongArray9Test",
591 "AtomicReference9Test",
592 "AtomicReferenceArray9Test",
593 "ExecutorCompletionService9Test",
594 "ForkJoinPool9Test",
595 };
596 addNamedTestClasses(suite, java9TestClassNames);
597 }
598
599 return suite;
600 }
601
602 /** Returns list of junit-style test method names in given class. */
603 public static ArrayList<String> testMethodNames(Class<?> testClass) {
604 Method[] methods = testClass.getDeclaredMethods();
605 ArrayList<String> names = new ArrayList<>(methods.length);
606 for (Method method : methods) {
607 if (method.getName().startsWith("test")
608 && Modifier.isPublic(method.getModifiers())
609 // method.getParameterCount() requires jdk8+
610 && method.getParameterTypes().length == 0) {
611 names.add(method.getName());
612 }
613 }
614 return names;
615 }
616
617 /**
618 * Returns junit-style testSuite for the given test class, but
619 * parameterized by passing extra data to each test.
620 */
621 public static <ExtraData> Test parameterizedTestSuite
622 (Class<? extends JSR166TestCase> testClass,
623 Class<ExtraData> dataClass,
624 ExtraData data) {
625 try {
626 TestSuite suite = new TestSuite();
627 Constructor c =
628 testClass.getDeclaredConstructor(dataClass, String.class);
629 for (String methodName : testMethodNames(testClass))
630 suite.addTest((Test) c.newInstance(data, methodName));
631 return suite;
632 } catch (ReflectiveOperationException e) {
633 throw new AssertionError(e);
634 }
635 }
636
637 /**
638 * Returns junit-style testSuite for the jdk8 extension of the
639 * given test class, but parameterized by passing extra data to
640 * each test. Uses reflection to allow compilation in jdk7.
641 */
642 public static <ExtraData> Test jdk8ParameterizedTestSuite
643 (Class<? extends JSR166TestCase> testClass,
644 Class<ExtraData> dataClass,
645 ExtraData data) {
646 if (atLeastJava8()) {
647 String name = testClass.getName();
648 String name8 = name.replaceAll("Test$", "8Test");
649 if (name.equals(name8)) throw new AssertionError(name);
650 try {
651 return (Test)
652 Class.forName(name8)
653 .getMethod("testSuite", dataClass)
654 .invoke(null, data);
655 } catch (ReflectiveOperationException e) {
656 throw new AssertionError(e);
657 }
658 } else {
659 return new TestSuite();
660 }
661 }
662
663 // Delays for timing-dependent tests, in milliseconds.
664
665 public static long SHORT_DELAY_MS;
666 public static long SMALL_DELAY_MS;
667 public static long MEDIUM_DELAY_MS;
668 public static long LONG_DELAY_MS;
669
670 private static final long RANDOM_TIMEOUT;
671 private static final long RANDOM_EXPIRED_TIMEOUT;
672 private static final TimeUnit RANDOM_TIMEUNIT;
673 static {
674 ThreadLocalRandom rnd = ThreadLocalRandom.current();
675 long[] timeouts = { Long.MIN_VALUE, -1, 0, 1, Long.MAX_VALUE };
676 RANDOM_TIMEOUT = timeouts[rnd.nextInt(timeouts.length)];
677 RANDOM_EXPIRED_TIMEOUT = timeouts[rnd.nextInt(3)];
678 TimeUnit[] timeUnits = TimeUnit.values();
679 RANDOM_TIMEUNIT = timeUnits[rnd.nextInt(timeUnits.length)];
680 }
681
682 /**
683 * Returns a timeout for use when any value at all will do.
684 */
685 static long randomTimeout() { return RANDOM_TIMEOUT; }
686
687 /**
688 * Returns a timeout that means "no waiting", i.e. not positive.
689 */
690 static long randomExpiredTimeout() { return RANDOM_EXPIRED_TIMEOUT; }
691
692 /**
693 * Returns a random non-null TimeUnit.
694 */
695 static TimeUnit randomTimeUnit() { return RANDOM_TIMEUNIT; }
696
697 /**
698 * Returns the shortest timed delay. This can be scaled up for
699 * slow machines using the jsr166.delay.factor system property,
700 * or via jtreg's -timeoutFactor: flag.
701 * http://openjdk.java.net/jtreg/command-help.html
702 */
703 protected long getShortDelay() {
704 return (long) (50 * delayFactor);
705 }
706
707 /**
708 * Sets delays as multiples of SHORT_DELAY.
709 */
710 protected void setDelays() {
711 SHORT_DELAY_MS = getShortDelay();
712 SMALL_DELAY_MS = SHORT_DELAY_MS * 5;
713 MEDIUM_DELAY_MS = SHORT_DELAY_MS * 10;
714 LONG_DELAY_MS = SHORT_DELAY_MS * 200;
715 }
716
717 private static final long TIMEOUT_DELAY_MS
718 = (long) (12.0 * Math.cbrt(delayFactor));
719
720 /**
721 * Returns a timeout in milliseconds to be used in tests that verify
722 * that operations block or time out. We want this to be longer
723 * than the OS scheduling quantum, but not too long, so don't scale
724 * linearly with delayFactor; we use "crazy" cube root instead.
725 */
726 static long timeoutMillis() {
727 return TIMEOUT_DELAY_MS;
728 }
729
730 /**
731 * Returns a new Date instance representing a time at least
732 * delayMillis milliseconds in the future.
733 */
734 Date delayedDate(long delayMillis) {
735 // Add 1 because currentTimeMillis is known to round into the past.
736 return new Date(System.currentTimeMillis() + delayMillis + 1);
737 }
738
739 /**
740 * The first exception encountered if any threadAssertXXX method fails.
741 */
742 private final AtomicReference<Throwable> threadFailure
743 = new AtomicReference<>(null);
744
745 /**
746 * Records an exception so that it can be rethrown later in the test
747 * harness thread, triggering a test case failure. Only the first
748 * failure is recorded; subsequent calls to this method from within
749 * the same test have no effect.
750 */
751 public void threadRecordFailure(Throwable t) {
752 System.err.println(t);
753 dumpTestThreads();
754 threadFailure.compareAndSet(null, t);
755 }
756
757 public void setUp() {
758 setDelays();
759 }
760
761 void tearDownFail(String format, Object... args) {
762 String msg = toString() + ": " + String.format(format, args);
763 System.err.println(msg);
764 dumpTestThreads();
765 throw new AssertionError(msg);
766 }
767
768 /**
769 * Extra checks that get done for all test cases.
770 *
771 * Triggers test case failure if any thread assertions have failed,
772 * by rethrowing, in the test harness thread, any exception recorded
773 * earlier by threadRecordFailure.
774 *
775 * Triggers test case failure if interrupt status is set in the main thread.
776 */
777 public void tearDown() throws Exception {
778 Throwable t = threadFailure.getAndSet(null);
779 if (t != null) {
780 if (t instanceof Error)
781 throw (Error) t;
782 else if (t instanceof RuntimeException)
783 throw (RuntimeException) t;
784 else if (t instanceof Exception)
785 throw (Exception) t;
786 else
787 throw new AssertionError(t.toString(), t);
788 }
789
790 if (Thread.interrupted())
791 tearDownFail("interrupt status set in main thread");
792
793 checkForkJoinPoolThreadLeaks();
794 }
795
796 /**
797 * Finds missing PoolCleaners
798 */
799 void checkForkJoinPoolThreadLeaks() throws InterruptedException {
800 Thread[] survivors = new Thread[7];
801 int count = Thread.enumerate(survivors);
802 for (int i = 0; i < count; i++) {
803 Thread thread = survivors[i];
804 String name = thread.getName();
805 if (name.startsWith("ForkJoinPool-")) {
806 // give thread some time to terminate
807 thread.join(LONG_DELAY_MS);
808 if (thread.isAlive())
809 tearDownFail("Found leaked ForkJoinPool thread thread=%s",
810 thread);
811 }
812 }
813
814 if (!ForkJoinPool.commonPool()
815 .awaitQuiescence(LONG_DELAY_MS, MILLISECONDS))
816 tearDownFail("ForkJoin common pool thread stuck");
817 }
818
819 /**
820 * Just like fail(reason), but additionally recording (using
821 * threadRecordFailure) any AssertionError thrown, so that the
822 * current testcase will fail.
823 */
824 public void threadFail(String reason) {
825 try {
826 fail(reason);
827 } catch (AssertionError fail) {
828 threadRecordFailure(fail);
829 throw fail;
830 }
831 }
832
833 /**
834 * Just like assertTrue(b), but additionally recording (using
835 * threadRecordFailure) any AssertionError thrown, so that the
836 * current testcase will fail.
837 */
838 public void threadAssertTrue(boolean b) {
839 try {
840 assertTrue(b);
841 } catch (AssertionError fail) {
842 threadRecordFailure(fail);
843 throw fail;
844 }
845 }
846
847 /**
848 * Just like assertFalse(b), but additionally recording (using
849 * threadRecordFailure) any AssertionError thrown, so that the
850 * current testcase will fail.
851 */
852 public void threadAssertFalse(boolean b) {
853 try {
854 assertFalse(b);
855 } catch (AssertionError fail) {
856 threadRecordFailure(fail);
857 throw fail;
858 }
859 }
860
861 /**
862 * Just like assertNull(x), but additionally recording (using
863 * threadRecordFailure) any AssertionError thrown, so that the
864 * current testcase will fail.
865 */
866 public void threadAssertNull(Object x) {
867 try {
868 assertNull(x);
869 } catch (AssertionError fail) {
870 threadRecordFailure(fail);
871 throw fail;
872 }
873 }
874
875 /**
876 * Just like assertEquals(x, y), but additionally recording (using
877 * threadRecordFailure) any AssertionError thrown, so that the
878 * current testcase will fail.
879 */
880 public void threadAssertEquals(long x, long y) {
881 try {
882 assertEquals(x, y);
883 } catch (AssertionError fail) {
884 threadRecordFailure(fail);
885 throw fail;
886 }
887 }
888
889 /**
890 * Just like assertEquals(x, y), but additionally recording (using
891 * threadRecordFailure) any AssertionError thrown, so that the
892 * current testcase will fail.
893 */
894 public void threadAssertEquals(Object x, Object y) {
895 try {
896 assertEquals(x, y);
897 } catch (AssertionError fail) {
898 threadRecordFailure(fail);
899 throw fail;
900 } catch (Throwable fail) {
901 threadUnexpectedException(fail);
902 }
903 }
904
905 /**
906 * Just like assertSame(x, y), but additionally recording (using
907 * threadRecordFailure) any AssertionError thrown, so that the
908 * current testcase will fail.
909 */
910 public void threadAssertSame(Object x, Object y) {
911 try {
912 assertSame(x, y);
913 } catch (AssertionError fail) {
914 threadRecordFailure(fail);
915 throw fail;
916 }
917 }
918
919 /**
920 * Calls threadFail with message "should throw exception".
921 */
922 public void threadShouldThrow() {
923 threadFail("should throw exception");
924 }
925
926 /**
927 * Calls threadFail with message "should throw" + exceptionName.
928 */
929 public void threadShouldThrow(String exceptionName) {
930 threadFail("should throw " + exceptionName);
931 }
932
933 /**
934 * Records the given exception using {@link #threadRecordFailure},
935 * then rethrows the exception, wrapping it in an AssertionError
936 * if necessary.
937 */
938 public void threadUnexpectedException(Throwable t) {
939 threadRecordFailure(t);
940 t.printStackTrace();
941 if (t instanceof RuntimeException)
942 throw (RuntimeException) t;
943 else if (t instanceof Error)
944 throw (Error) t;
945 else
946 throw new AssertionError("unexpected exception: " + t, t);
947 }
948
949 /**
950 * Delays, via Thread.sleep, for the given millisecond delay, but
951 * if the sleep is shorter than specified, may re-sleep or yield
952 * until time elapses. Ensures that the given time, as measured
953 * by System.nanoTime(), has elapsed.
954 */
955 static void delay(long millis) throws InterruptedException {
956 long nanos = millis * (1000 * 1000);
957 final long wakeupTime = System.nanoTime() + nanos;
958 do {
959 if (millis > 0L)
960 Thread.sleep(millis);
961 else // too short to sleep
962 Thread.yield();
963 nanos = wakeupTime - System.nanoTime();
964 millis = nanos / (1000 * 1000);
965 } while (nanos >= 0L);
966 }
967
968 /**
969 * Allows use of try-with-resources with per-test thread pools.
970 */
971 class PoolCleaner implements AutoCloseable {
972 private final ExecutorService pool;
973 public PoolCleaner(ExecutorService pool) { this.pool = pool; }
974 public void close() { joinPool(pool); }
975 }
976
977 /**
978 * An extension of PoolCleaner that has an action to release the pool.
979 */
980 class PoolCleanerWithReleaser extends PoolCleaner {
981 private final Runnable releaser;
982 public PoolCleanerWithReleaser(ExecutorService pool, Runnable releaser) {
983 super(pool);
984 this.releaser = releaser;
985 }
986 public void close() {
987 try {
988 releaser.run();
989 } finally {
990 super.close();
991 }
992 }
993 }
994
995 PoolCleaner cleaner(ExecutorService pool) {
996 return new PoolCleaner(pool);
997 }
998
999 PoolCleaner cleaner(ExecutorService pool, Runnable releaser) {
1000 return new PoolCleanerWithReleaser(pool, releaser);
1001 }
1002
1003 PoolCleaner cleaner(ExecutorService pool, CountDownLatch latch) {
1004 return new PoolCleanerWithReleaser(pool, releaser(latch));
1005 }
1006
1007 Runnable releaser(final CountDownLatch latch) {
1008 return new Runnable() { public void run() {
1009 do { latch.countDown(); }
1010 while (latch.getCount() > 0);
1011 }};
1012 }
1013
1014 PoolCleaner cleaner(ExecutorService pool, AtomicBoolean flag) {
1015 return new PoolCleanerWithReleaser(pool, releaser(flag));
1016 }
1017
1018 Runnable releaser(final AtomicBoolean flag) {
1019 return new Runnable() { public void run() { flag.set(true); }};
1020 }
1021
1022 /**
1023 * Waits out termination of a thread pool or fails doing so.
1024 */
1025 void joinPool(ExecutorService pool) {
1026 try {
1027 pool.shutdown();
1028 if (!pool.awaitTermination(2 * LONG_DELAY_MS, MILLISECONDS)) {
1029 try {
1030 threadFail("ExecutorService " + pool +
1031 " did not terminate in a timely manner");
1032 } finally {
1033 // last resort, for the benefit of subsequent tests
1034 pool.shutdownNow();
1035 pool.awaitTermination(MEDIUM_DELAY_MS, MILLISECONDS);
1036 }
1037 }
1038 } catch (SecurityException ok) {
1039 // Allowed in case test doesn't have privs
1040 } catch (InterruptedException fail) {
1041 threadFail("Unexpected InterruptedException");
1042 }
1043 }
1044
1045 /**
1046 * Like Runnable, but with the freedom to throw anything.
1047 * junit folks had the same idea:
1048 * http://junit.org/junit5/docs/snapshot/api/org/junit/gen5/api/Executable.html
1049 */
1050 interface Action { public void run() throws Throwable; }
1051
1052 /**
1053 * Runs all the given actions in parallel, failing if any fail.
1054 * Useful for running multiple variants of tests that are
1055 * necessarily individually slow because they must block.
1056 */
1057 void testInParallel(Action ... actions) {
1058 ExecutorService pool = Executors.newCachedThreadPool();
1059 try (PoolCleaner cleaner = cleaner(pool)) {
1060 ArrayList<Future<?>> futures = new ArrayList<>(actions.length);
1061 for (final Action action : actions)
1062 futures.add(pool.submit(new CheckedRunnable() {
1063 public void realRun() throws Throwable { action.run();}}));
1064 for (Future<?> future : futures)
1065 try {
1066 assertNull(future.get(LONG_DELAY_MS, MILLISECONDS));
1067 } catch (ExecutionException ex) {
1068 threadUnexpectedException(ex.getCause());
1069 } catch (Exception ex) {
1070 threadUnexpectedException(ex);
1071 }
1072 }
1073 }
1074
1075 /**
1076 * A debugging tool to print stack traces of most threads, as jstack does.
1077 * Uninteresting threads are filtered out.
1078 */
1079 static void dumpTestThreads() {
1080 SecurityManager sm = System.getSecurityManager();
1081 if (sm != null) {
1082 try {
1083 System.setSecurityManager(null);
1084 } catch (SecurityException giveUp) {
1085 return;
1086 }
1087 }
1088
1089 ThreadMXBean threadMXBean = ManagementFactory.getThreadMXBean();
1090 System.err.println("------ stacktrace dump start ------");
1091 for (ThreadInfo info : threadMXBean.dumpAllThreads(true, true)) {
1092 final String name = info.getThreadName();
1093 String lockName;
1094 if ("Signal Dispatcher".equals(name))
1095 continue;
1096 if ("Reference Handler".equals(name)
1097 && (lockName = info.getLockName()) != null
1098 && lockName.startsWith("java.lang.ref.Reference$Lock"))
1099 continue;
1100 if ("Finalizer".equals(name)
1101 && (lockName = info.getLockName()) != null
1102 && lockName.startsWith("java.lang.ref.ReferenceQueue$Lock"))
1103 continue;
1104 if ("checkForWedgedTest".equals(name))
1105 continue;
1106 System.err.print(info);
1107 }
1108 System.err.println("------ stacktrace dump end ------");
1109
1110 if (sm != null) System.setSecurityManager(sm);
1111 }
1112
1113 /**
1114 * Checks that thread eventually enters the expected blocked thread state.
1115 */
1116 void assertThreadBlocks(Thread thread, Thread.State expected) {
1117 // always sleep at least 1 ms, with high probability avoiding
1118 // transitory states
1119 for (long retries = LONG_DELAY_MS * 3 / 4; retries-->0; ) {
1120 try { delay(1); }
1121 catch (InterruptedException fail) {
1122 throw new AssertionError("Unexpected InterruptedException", fail);
1123 }
1124 Thread.State s = thread.getState();
1125 if (s == expected)
1126 return;
1127 else if (s == Thread.State.TERMINATED)
1128 fail("Unexpected thread termination");
1129 }
1130 fail("timed out waiting for thread to enter thread state " + expected);
1131 }
1132
1133 /**
1134 * Checks that future.get times out, with the default timeout of
1135 * {@code timeoutMillis()}.
1136 */
1137 void assertFutureTimesOut(Future future) {
1138 assertFutureTimesOut(future, timeoutMillis());
1139 }
1140
1141 /**
1142 * Checks that future.get times out, with the given millisecond timeout.
1143 */
1144 void assertFutureTimesOut(Future future, long timeoutMillis) {
1145 long startTime = System.nanoTime();
1146 try {
1147 future.get(timeoutMillis, MILLISECONDS);
1148 shouldThrow();
1149 } catch (TimeoutException success) {
1150 } catch (Exception fail) {
1151 threadUnexpectedException(fail);
1152 } finally { future.cancel(true); }
1153 assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
1154 }
1155
1156 /**
1157 * Fails with message "should throw exception".
1158 */
1159 public void shouldThrow() {
1160 fail("Should throw exception");
1161 }
1162
1163 /**
1164 * Fails with message "should throw " + exceptionName.
1165 */
1166 public void shouldThrow(String exceptionName) {
1167 fail("Should throw " + exceptionName);
1168 }
1169
1170 /**
1171 * The maximum number of consecutive spurious wakeups we should
1172 * tolerate (from APIs like LockSupport.park) before failing a test.
1173 */
1174 static final int MAX_SPURIOUS_WAKEUPS = 10;
1175
1176 /**
1177 * The number of elements to place in collections, arrays, etc.
1178 */
1179 public static final int SIZE = 20;
1180
1181 // Some convenient Integer constants
1182
1183 public static final Integer zero = new Integer(0);
1184 public static final Integer one = new Integer(1);
1185 public static final Integer two = new Integer(2);
1186 public static final Integer three = new Integer(3);
1187 public static final Integer four = new Integer(4);
1188 public static final Integer five = new Integer(5);
1189 public static final Integer six = new Integer(6);
1190 public static final Integer seven = new Integer(7);
1191 public static final Integer eight = new Integer(8);
1192 public static final Integer nine = new Integer(9);
1193 public static final Integer m1 = new Integer(-1);
1194 public static final Integer m2 = new Integer(-2);
1195 public static final Integer m3 = new Integer(-3);
1196 public static final Integer m4 = new Integer(-4);
1197 public static final Integer m5 = new Integer(-5);
1198 public static final Integer m6 = new Integer(-6);
1199 public static final Integer m10 = new Integer(-10);
1200
1201 /**
1202 * Runs Runnable r with a security policy that permits precisely
1203 * the specified permissions. If there is no current security
1204 * manager, the runnable is run twice, both with and without a
1205 * security manager. We require that any security manager permit
1206 * getPolicy/setPolicy.
1207 */
1208 public void runWithPermissions(Runnable r, Permission... permissions) {
1209 SecurityManager sm = System.getSecurityManager();
1210 if (sm == null) {
1211 r.run();
1212 }
1213 runWithSecurityManagerWithPermissions(r, permissions);
1214 }
1215
1216 /**
1217 * Runs Runnable r with a security policy that permits precisely
1218 * the specified permissions. If there is no current security
1219 * manager, a temporary one is set for the duration of the
1220 * Runnable. We require that any security manager permit
1221 * getPolicy/setPolicy.
1222 */
1223 public void runWithSecurityManagerWithPermissions(Runnable r,
1224 Permission... permissions) {
1225 SecurityManager sm = System.getSecurityManager();
1226 if (sm == null) {
1227 Policy savedPolicy = Policy.getPolicy();
1228 try {
1229 Policy.setPolicy(permissivePolicy());
1230 System.setSecurityManager(new SecurityManager());
1231 runWithSecurityManagerWithPermissions(r, permissions);
1232 } finally {
1233 System.setSecurityManager(null);
1234 Policy.setPolicy(savedPolicy);
1235 }
1236 } else {
1237 Policy savedPolicy = Policy.getPolicy();
1238 AdjustablePolicy policy = new AdjustablePolicy(permissions);
1239 Policy.setPolicy(policy);
1240
1241 try {
1242 r.run();
1243 } finally {
1244 policy.addPermission(new SecurityPermission("setPolicy"));
1245 Policy.setPolicy(savedPolicy);
1246 }
1247 }
1248 }
1249
1250 /**
1251 * Runs a runnable without any permissions.
1252 */
1253 public void runWithoutPermissions(Runnable r) {
1254 runWithPermissions(r);
1255 }
1256
1257 /**
1258 * A security policy where new permissions can be dynamically added
1259 * or all cleared.
1260 */
1261 public static class AdjustablePolicy extends java.security.Policy {
1262 Permissions perms = new Permissions();
1263 AdjustablePolicy(Permission... permissions) {
1264 for (Permission permission : permissions)
1265 perms.add(permission);
1266 }
1267 void addPermission(Permission perm) { perms.add(perm); }
1268 void clearPermissions() { perms = new Permissions(); }
1269 public PermissionCollection getPermissions(CodeSource cs) {
1270 return perms;
1271 }
1272 public PermissionCollection getPermissions(ProtectionDomain pd) {
1273 return perms;
1274 }
1275 public boolean implies(ProtectionDomain pd, Permission p) {
1276 return perms.implies(p);
1277 }
1278 public void refresh() {}
1279 public String toString() {
1280 List<Permission> ps = new ArrayList<>();
1281 for (Enumeration<Permission> e = perms.elements(); e.hasMoreElements();)
1282 ps.add(e.nextElement());
1283 return "AdjustablePolicy with permissions " + ps;
1284 }
1285 }
1286
1287 /**
1288 * Returns a policy containing all the permissions we ever need.
1289 */
1290 public static Policy permissivePolicy() {
1291 return new AdjustablePolicy
1292 // Permissions j.u.c. needs directly
1293 (new RuntimePermission("modifyThread"),
1294 new RuntimePermission("getClassLoader"),
1295 new RuntimePermission("setContextClassLoader"),
1296 // Permissions needed to change permissions!
1297 new SecurityPermission("getPolicy"),
1298 new SecurityPermission("setPolicy"),
1299 new RuntimePermission("setSecurityManager"),
1300 // Permissions needed by the junit test harness
1301 new RuntimePermission("accessDeclaredMembers"),
1302 new PropertyPermission("*", "read"),
1303 new java.io.FilePermission("<<ALL FILES>>", "read"));
1304 }
1305
1306 /**
1307 * Sleeps until the given time has elapsed.
1308 * Throws AssertionError if interrupted.
1309 */
1310 static void sleep(long millis) {
1311 try {
1312 delay(millis);
1313 } catch (InterruptedException fail) {
1314 throw new AssertionError("Unexpected InterruptedException", fail);
1315 }
1316 }
1317
1318 /**
1319 * Spin-waits up to the specified number of milliseconds for the given
1320 * thread to enter a wait state: BLOCKED, WAITING, or TIMED_WAITING.
1321 */
1322 void waitForThreadToEnterWaitState(Thread thread, long timeoutMillis) {
1323 long startTime = 0L;
1324 for (;;) {
1325 Thread.State s = thread.getState();
1326 if (s == Thread.State.BLOCKED ||
1327 s == Thread.State.WAITING ||
1328 s == Thread.State.TIMED_WAITING)
1329 return;
1330 else if (s == Thread.State.TERMINATED)
1331 fail("Unexpected thread termination");
1332 else if (startTime == 0L)
1333 startTime = System.nanoTime();
1334 else if (millisElapsedSince(startTime) > timeoutMillis) {
1335 threadAssertTrue(thread.isAlive());
1336 fail("timed out waiting for thread to enter wait state");
1337 }
1338 Thread.yield();
1339 }
1340 }
1341
1342 /**
1343 * Spin-waits up to the specified number of milliseconds for the given
1344 * thread to enter a wait state: BLOCKED, WAITING, or TIMED_WAITING,
1345 * and additionally satisfy the given condition.
1346 */
1347 void waitForThreadToEnterWaitState(
1348 Thread thread, long timeoutMillis, Callable<Boolean> waitingForGodot) {
1349 long startTime = 0L;
1350 for (;;) {
1351 Thread.State s = thread.getState();
1352 if (s == Thread.State.BLOCKED ||
1353 s == Thread.State.WAITING ||
1354 s == Thread.State.TIMED_WAITING) {
1355 try {
1356 if (waitingForGodot.call())
1357 return;
1358 } catch (Throwable fail) { threadUnexpectedException(fail); }
1359 }
1360 else if (s == Thread.State.TERMINATED)
1361 fail("Unexpected thread termination");
1362 else if (startTime == 0L)
1363 startTime = System.nanoTime();
1364 else if (millisElapsedSince(startTime) > timeoutMillis) {
1365 threadAssertTrue(thread.isAlive());
1366 fail("timed out waiting for thread to enter wait state");
1367 }
1368 Thread.yield();
1369 }
1370 }
1371
1372 /**
1373 * Spin-waits up to LONG_DELAY_MS milliseconds for the given thread to
1374 * enter a wait state: BLOCKED, WAITING, or TIMED_WAITING.
1375 */
1376 void waitForThreadToEnterWaitState(Thread thread) {
1377 waitForThreadToEnterWaitState(thread, LONG_DELAY_MS);
1378 }
1379
1380 /**
1381 * Spin-waits up to LONG_DELAY_MS milliseconds for the given thread to
1382 * enter a wait state: BLOCKED, WAITING, or TIMED_WAITING,
1383 * and additionally satisfy the given condition.
1384 */
1385 void waitForThreadToEnterWaitState(
1386 Thread thread, Callable<Boolean> waitingForGodot) {
1387 waitForThreadToEnterWaitState(thread, LONG_DELAY_MS, waitingForGodot);
1388 }
1389
1390 /**
1391 * Returns the number of milliseconds since time given by
1392 * startNanoTime, which must have been previously returned from a
1393 * call to {@link System#nanoTime()}.
1394 */
1395 static long millisElapsedSince(long startNanoTime) {
1396 return NANOSECONDS.toMillis(System.nanoTime() - startNanoTime);
1397 }
1398
1399 // void assertTerminatesPromptly(long timeoutMillis, Runnable r) {
1400 // long startTime = System.nanoTime();
1401 // try {
1402 // r.run();
1403 // } catch (Throwable fail) { threadUnexpectedException(fail); }
1404 // if (millisElapsedSince(startTime) > timeoutMillis/2)
1405 // throw new AssertionError("did not return promptly");
1406 // }
1407
1408 // void assertTerminatesPromptly(Runnable r) {
1409 // assertTerminatesPromptly(LONG_DELAY_MS/2, r);
1410 // }
1411
1412 /**
1413 * Checks that timed f.get() returns the expected value, and does not
1414 * wait for the timeout to elapse before returning.
1415 */
1416 <T> void checkTimedGet(Future<T> f, T expectedValue, long timeoutMillis) {
1417 long startTime = System.nanoTime();
1418 T actual = null;
1419 try {
1420 actual = f.get(timeoutMillis, MILLISECONDS);
1421 } catch (Throwable fail) { threadUnexpectedException(fail); }
1422 assertEquals(expectedValue, actual);
1423 if (millisElapsedSince(startTime) > timeoutMillis/2)
1424 throw new AssertionError("timed get did not return promptly");
1425 }
1426
1427 <T> void checkTimedGet(Future<T> f, T expectedValue) {
1428 checkTimedGet(f, expectedValue, LONG_DELAY_MS);
1429 }
1430
1431 /**
1432 * Returns a new started daemon Thread running the given runnable.
1433 */
1434 Thread newStartedThread(Runnable runnable) {
1435 Thread t = new Thread(runnable);
1436 t.setDaemon(true);
1437 t.start();
1438 return t;
1439 }
1440
1441 /**
1442 * Waits for the specified time (in milliseconds) for the thread
1443 * to terminate (using {@link Thread#join(long)}), else interrupts
1444 * the thread (in the hope that it may terminate later) and fails.
1445 */
1446 void awaitTermination(Thread t, long timeoutMillis) {
1447 try {
1448 t.join(timeoutMillis);
1449 } catch (InterruptedException fail) {
1450 threadUnexpectedException(fail);
1451 } finally {
1452 if (t.getState() != Thread.State.TERMINATED) {
1453 t.interrupt();
1454 threadFail("timed out waiting for thread to terminate");
1455 }
1456 }
1457 }
1458
1459 /**
1460 * Waits for LONG_DELAY_MS milliseconds for the thread to
1461 * terminate (using {@link Thread#join(long)}), else interrupts
1462 * the thread (in the hope that it may terminate later) and fails.
1463 */
1464 void awaitTermination(Thread t) {
1465 awaitTermination(t, LONG_DELAY_MS);
1466 }
1467
1468 // Some convenient Runnable classes
1469
1470 public abstract class CheckedRunnable implements Runnable {
1471 protected abstract void realRun() throws Throwable;
1472
1473 public final void run() {
1474 try {
1475 realRun();
1476 } catch (Throwable fail) {
1477 threadUnexpectedException(fail);
1478 }
1479 }
1480 }
1481
1482 public abstract class ThreadShouldThrow extends Thread {
1483 protected abstract void realRun() throws Throwable;
1484
1485 final Class<?> exceptionClass;
1486
1487 <T extends Throwable> ThreadShouldThrow(Class<T> exceptionClass) {
1488 this.exceptionClass = exceptionClass;
1489 }
1490
1491 public final void run() {
1492 try {
1493 realRun();
1494 threadShouldThrow(exceptionClass.getSimpleName());
1495 } catch (Throwable t) {
1496 if (! exceptionClass.isInstance(t))
1497 threadUnexpectedException(t);
1498 }
1499 }
1500 }
1501
1502 public abstract class CheckedInterruptedRunnable implements Runnable {
1503 protected abstract void realRun() throws Throwable;
1504
1505 public final void run() {
1506 try {
1507 realRun();
1508 threadShouldThrow("InterruptedException");
1509 } catch (InterruptedException success) {
1510 threadAssertFalse(Thread.interrupted());
1511 } catch (Throwable fail) {
1512 threadUnexpectedException(fail);
1513 }
1514 }
1515 }
1516
1517 public abstract class CheckedCallable<T> implements Callable<T> {
1518 protected abstract T realCall() throws Throwable;
1519
1520 public final T call() {
1521 try {
1522 return realCall();
1523 } catch (Throwable fail) {
1524 threadUnexpectedException(fail);
1525 return null;
1526 }
1527 }
1528 }
1529
1530 public abstract class CheckedInterruptedCallable<T>
1531 implements Callable<T> {
1532 protected abstract T realCall() throws Throwable;
1533
1534 public final T call() {
1535 try {
1536 T result = realCall();
1537 threadShouldThrow("InterruptedException");
1538 return result;
1539 } catch (InterruptedException success) {
1540 threadAssertFalse(Thread.interrupted());
1541 } catch (Throwable fail) {
1542 threadUnexpectedException(fail);
1543 }
1544 return null;
1545 }
1546 }
1547
1548 public static class NoOpRunnable implements Runnable {
1549 public void run() {}
1550 }
1551
1552 public static class NoOpCallable implements Callable {
1553 public Object call() { return Boolean.TRUE; }
1554 }
1555
1556 public static final String TEST_STRING = "a test string";
1557
1558 public static class StringTask implements Callable<String> {
1559 final String value;
1560 public StringTask() { this(TEST_STRING); }
1561 public StringTask(String value) { this.value = value; }
1562 public String call() { return value; }
1563 }
1564
1565 public Callable<String> latchAwaitingStringTask(final CountDownLatch latch) {
1566 return new CheckedCallable<String>() {
1567 protected String realCall() {
1568 try {
1569 latch.await();
1570 } catch (InterruptedException quittingTime) {}
1571 return TEST_STRING;
1572 }};
1573 }
1574
1575 public Runnable countDowner(final CountDownLatch latch) {
1576 return new CheckedRunnable() {
1577 public void realRun() throws InterruptedException {
1578 latch.countDown();
1579 }};
1580 }
1581
1582 class LatchAwaiter extends CheckedRunnable {
1583 static final int NEW = 0;
1584 static final int RUNNING = 1;
1585 static final int DONE = 2;
1586 final CountDownLatch latch;
1587 int state = NEW;
1588 LatchAwaiter(CountDownLatch latch) { this.latch = latch; }
1589 public void realRun() throws InterruptedException {
1590 state = 1;
1591 await(latch);
1592 state = 2;
1593 }
1594 }
1595
1596 public LatchAwaiter awaiter(CountDownLatch latch) {
1597 return new LatchAwaiter(latch);
1598 }
1599
1600 public void await(CountDownLatch latch, long timeoutMillis) {
1601 boolean timedOut = false;
1602 try {
1603 timedOut = !latch.await(timeoutMillis, MILLISECONDS);
1604 } catch (Throwable fail) {
1605 threadUnexpectedException(fail);
1606 }
1607 if (timedOut)
1608 fail("timed out waiting for CountDownLatch for "
1609 + (timeoutMillis/1000) + " sec");
1610 }
1611
1612 public void await(CountDownLatch latch) {
1613 await(latch, LONG_DELAY_MS);
1614 }
1615
1616 public void await(Semaphore semaphore) {
1617 boolean timedOut = false;
1618 try {
1619 timedOut = !semaphore.tryAcquire(LONG_DELAY_MS, MILLISECONDS);
1620 } catch (Throwable fail) {
1621 threadUnexpectedException(fail);
1622 }
1623 if (timedOut)
1624 fail("timed out waiting for Semaphore for "
1625 + (LONG_DELAY_MS/1000) + " sec");
1626 }
1627
1628 public void await(CyclicBarrier barrier) {
1629 try {
1630 barrier.await(LONG_DELAY_MS, MILLISECONDS);
1631 } catch (Throwable fail) {
1632 threadUnexpectedException(fail);
1633 }
1634 }
1635
1636 // /**
1637 // * Spin-waits up to LONG_DELAY_MS until flag becomes true.
1638 // */
1639 // public void await(AtomicBoolean flag) {
1640 // await(flag, LONG_DELAY_MS);
1641 // }
1642
1643 // /**
1644 // * Spin-waits up to the specified timeout until flag becomes true.
1645 // */
1646 // public void await(AtomicBoolean flag, long timeoutMillis) {
1647 // long startTime = System.nanoTime();
1648 // while (!flag.get()) {
1649 // if (millisElapsedSince(startTime) > timeoutMillis)
1650 // throw new AssertionError("timed out");
1651 // Thread.yield();
1652 // }
1653 // }
1654
1655 public static class NPETask implements Callable<String> {
1656 public String call() { throw new NullPointerException(); }
1657 }
1658
1659 public class SmallPossiblyInterruptedRunnable extends CheckedRunnable {
1660 protected void realRun() {
1661 try {
1662 delay(SMALL_DELAY_MS);
1663 } catch (InterruptedException ok) {}
1664 }
1665 }
1666
1667 public Runnable possiblyInterruptedRunnable(final long timeoutMillis) {
1668 return new CheckedRunnable() {
1669 protected void realRun() {
1670 try {
1671 delay(timeoutMillis);
1672 } catch (InterruptedException ok) {}
1673 }};
1674 }
1675
1676 /**
1677 * For use as ThreadFactory in constructors
1678 */
1679 public static class SimpleThreadFactory implements ThreadFactory {
1680 public Thread newThread(Runnable r) {
1681 return new Thread(r);
1682 }
1683 }
1684
1685 public interface TrackedRunnable extends Runnable {
1686 boolean isDone();
1687 }
1688
1689 public static class TrackedNoOpRunnable implements Runnable {
1690 public volatile boolean done = false;
1691 public void run() {
1692 done = true;
1693 }
1694 }
1695
1696 /**
1697 * Analog of CheckedRunnable for RecursiveAction
1698 */
1699 public abstract class CheckedRecursiveAction extends RecursiveAction {
1700 protected abstract void realCompute() throws Throwable;
1701
1702 @Override protected final void compute() {
1703 try {
1704 realCompute();
1705 } catch (Throwable fail) {
1706 threadUnexpectedException(fail);
1707 }
1708 }
1709 }
1710
1711 /**
1712 * Analog of CheckedCallable for RecursiveTask
1713 */
1714 public abstract class CheckedRecursiveTask<T> extends RecursiveTask<T> {
1715 protected abstract T realCompute() throws Throwable;
1716
1717 @Override protected final T compute() {
1718 try {
1719 return realCompute();
1720 } catch (Throwable fail) {
1721 threadUnexpectedException(fail);
1722 return null;
1723 }
1724 }
1725 }
1726
1727 /**
1728 * For use as RejectedExecutionHandler in constructors
1729 */
1730 public static class NoOpREHandler implements RejectedExecutionHandler {
1731 public void rejectedExecution(Runnable r,
1732 ThreadPoolExecutor executor) {}
1733 }
1734
1735 /**
1736 * A CyclicBarrier that uses timed await and fails with
1737 * AssertionErrors instead of throwing checked exceptions.
1738 */
1739 public static class CheckedBarrier extends CyclicBarrier {
1740 public CheckedBarrier(int parties) { super(parties); }
1741
1742 public int await() {
1743 try {
1744 return super.await(2 * LONG_DELAY_MS, MILLISECONDS);
1745 } catch (TimeoutException timedOut) {
1746 throw new AssertionError("timed out");
1747 } catch (Exception fail) {
1748 throw new AssertionError("Unexpected exception: " + fail, fail);
1749 }
1750 }
1751 }
1752
1753 void checkEmpty(BlockingQueue q) {
1754 try {
1755 assertTrue(q.isEmpty());
1756 assertEquals(0, q.size());
1757 assertNull(q.peek());
1758 assertNull(q.poll());
1759 assertNull(q.poll(randomExpiredTimeout(), randomTimeUnit()));
1760 assertEquals(q.toString(), "[]");
1761 assertTrue(Arrays.equals(q.toArray(), new Object[0]));
1762 assertFalse(q.iterator().hasNext());
1763 try {
1764 q.element();
1765 shouldThrow();
1766 } catch (NoSuchElementException success) {}
1767 try {
1768 q.iterator().next();
1769 shouldThrow();
1770 } catch (NoSuchElementException success) {}
1771 try {
1772 q.remove();
1773 shouldThrow();
1774 } catch (NoSuchElementException success) {}
1775 } catch (InterruptedException fail) { threadUnexpectedException(fail); }
1776 }
1777
1778 void assertSerialEquals(Object x, Object y) {
1779 assertTrue(Arrays.equals(serialBytes(x), serialBytes(y)));
1780 }
1781
1782 void assertNotSerialEquals(Object x, Object y) {
1783 assertFalse(Arrays.equals(serialBytes(x), serialBytes(y)));
1784 }
1785
1786 byte[] serialBytes(Object o) {
1787 try {
1788 ByteArrayOutputStream bos = new ByteArrayOutputStream();
1789 ObjectOutputStream oos = new ObjectOutputStream(bos);
1790 oos.writeObject(o);
1791 oos.flush();
1792 oos.close();
1793 return bos.toByteArray();
1794 } catch (Throwable fail) {
1795 threadUnexpectedException(fail);
1796 return new byte[0];
1797 }
1798 }
1799
1800 void assertImmutable(final Object o) {
1801 if (o instanceof Collection) {
1802 assertThrows(
1803 UnsupportedOperationException.class,
1804 new Runnable() { public void run() {
1805 ((Collection) o).add(null);}});
1806 }
1807 }
1808
1809 @SuppressWarnings("unchecked")
1810 <T> T serialClone(T o) {
1811 T clone = null;
1812 try {
1813 ObjectInputStream ois = new ObjectInputStream
1814 (new ByteArrayInputStream(serialBytes(o)));
1815 clone = (T) ois.readObject();
1816 } catch (Throwable fail) {
1817 threadUnexpectedException(fail);
1818 }
1819 if (o == clone) assertImmutable(o);
1820 else assertSame(o.getClass(), clone.getClass());
1821 return clone;
1822 }
1823
1824 /**
1825 * A version of serialClone that leaves error handling (for
1826 * e.g. NotSerializableException) up to the caller.
1827 */
1828 @SuppressWarnings("unchecked")
1829 <T> T serialClonePossiblyFailing(T o)
1830 throws ReflectiveOperationException, java.io.IOException {
1831 ByteArrayOutputStream bos = new ByteArrayOutputStream();
1832 ObjectOutputStream oos = new ObjectOutputStream(bos);
1833 oos.writeObject(o);
1834 oos.flush();
1835 oos.close();
1836 ObjectInputStream ois = new ObjectInputStream
1837 (new ByteArrayInputStream(bos.toByteArray()));
1838 T clone = (T) ois.readObject();
1839 if (o == clone) assertImmutable(o);
1840 else assertSame(o.getClass(), clone.getClass());
1841 return clone;
1842 }
1843
1844 /**
1845 * If o implements Cloneable and has a public clone method,
1846 * returns a clone of o, else null.
1847 */
1848 @SuppressWarnings("unchecked")
1849 <T> T cloneableClone(T o) {
1850 if (!(o instanceof Cloneable)) return null;
1851 final T clone;
1852 try {
1853 clone = (T) o.getClass().getMethod("clone").invoke(o);
1854 } catch (NoSuchMethodException ok) {
1855 return null;
1856 } catch (ReflectiveOperationException unexpected) {
1857 throw new Error(unexpected);
1858 }
1859 assertNotSame(o, clone); // not 100% guaranteed by spec
1860 assertSame(o.getClass(), clone.getClass());
1861 return clone;
1862 }
1863
1864 public void assertThrows(Class<? extends Throwable> expectedExceptionClass,
1865 Runnable... throwingActions) {
1866 for (Runnable throwingAction : throwingActions) {
1867 boolean threw = false;
1868 try { throwingAction.run(); }
1869 catch (Throwable t) {
1870 threw = true;
1871 if (!expectedExceptionClass.isInstance(t))
1872 throw new AssertionError(
1873 "Expected " + expectedExceptionClass.getName() +
1874 ", got " + t.getClass().getName(),
1875 t);
1876 }
1877 if (!threw)
1878 shouldThrow(expectedExceptionClass.getName());
1879 }
1880 }
1881
1882 public void assertIteratorExhausted(Iterator<?> it) {
1883 try {
1884 it.next();
1885 shouldThrow();
1886 } catch (NoSuchElementException success) {}
1887 assertFalse(it.hasNext());
1888 }
1889
1890 public <T> Callable<T> callableThrowing(final Exception ex) {
1891 return new Callable<T>() { public T call() throws Exception { throw ex; }};
1892 }
1893
1894 public Runnable runnableThrowing(final RuntimeException ex) {
1895 return new Runnable() { public void run() { throw ex; }};
1896 }
1897
1898 /** A reusable thread pool to be shared by tests. */
1899 static final ExecutorService cachedThreadPool =
1900 new ThreadPoolExecutor(0, Integer.MAX_VALUE,
1901 1000L, MILLISECONDS,
1902 new SynchronousQueue<Runnable>());
1903
1904 static <T> void shuffle(T[] array) {
1905 Collections.shuffle(Arrays.asList(array), ThreadLocalRandom.current());
1906 }
1907
1908 /**
1909 * Returns the same String as would be returned by {@link
1910 * Object#toString}, whether or not the given object's class
1911 * overrides toString().
1912 *
1913 * @see System#identityHashCode
1914 */
1915 static String identityString(Object x) {
1916 return x.getClass().getName()
1917 + "@" + Integer.toHexString(System.identityHashCode(x));
1918 }
1919
1920 // --- Shared assertions for Executor tests ---
1921
1922 /**
1923 * Returns maximum number of tasks that can be submitted to given
1924 * pool (with bounded queue) before saturation (when submission
1925 * throws RejectedExecutionException).
1926 */
1927 static final int saturatedSize(ThreadPoolExecutor pool) {
1928 BlockingQueue<Runnable> q = pool.getQueue();
1929 return pool.getMaximumPoolSize() + q.size() + q.remainingCapacity();
1930 }
1931
1932 @SuppressWarnings("FutureReturnValueIgnored")
1933 void assertNullTaskSubmissionThrowsNullPointerException(Executor e) {
1934 try {
1935 e.execute((Runnable) null);
1936 shouldThrow();
1937 } catch (NullPointerException success) {}
1938
1939 if (! (e instanceof ExecutorService)) return;
1940 ExecutorService es = (ExecutorService) e;
1941 try {
1942 es.submit((Runnable) null);
1943 shouldThrow();
1944 } catch (NullPointerException success) {}
1945 try {
1946 es.submit((Runnable) null, Boolean.TRUE);
1947 shouldThrow();
1948 } catch (NullPointerException success) {}
1949 try {
1950 es.submit((Callable) null);
1951 shouldThrow();
1952 } catch (NullPointerException success) {}
1953
1954 if (! (e instanceof ScheduledExecutorService)) return;
1955 ScheduledExecutorService ses = (ScheduledExecutorService) e;
1956 try {
1957 ses.schedule((Runnable) null,
1958 randomTimeout(), randomTimeUnit());
1959 shouldThrow();
1960 } catch (NullPointerException success) {}
1961 try {
1962 ses.schedule((Callable) null,
1963 randomTimeout(), randomTimeUnit());
1964 shouldThrow();
1965 } catch (NullPointerException success) {}
1966 try {
1967 ses.scheduleAtFixedRate((Runnable) null,
1968 randomTimeout(), LONG_DELAY_MS, MILLISECONDS);
1969 shouldThrow();
1970 } catch (NullPointerException success) {}
1971 try {
1972 ses.scheduleWithFixedDelay((Runnable) null,
1973 randomTimeout(), LONG_DELAY_MS, MILLISECONDS);
1974 shouldThrow();
1975 } catch (NullPointerException success) {}
1976 }
1977
1978 void setRejectedExecutionHandler(
1979 ThreadPoolExecutor p, RejectedExecutionHandler handler) {
1980 p.setRejectedExecutionHandler(handler);
1981 assertSame(handler, p.getRejectedExecutionHandler());
1982 }
1983
1984 void assertTaskSubmissionsAreRejected(ThreadPoolExecutor p) {
1985 final RejectedExecutionHandler savedHandler = p.getRejectedExecutionHandler();
1986 final long savedTaskCount = p.getTaskCount();
1987 final long savedCompletedTaskCount = p.getCompletedTaskCount();
1988 final int savedQueueSize = p.getQueue().size();
1989 final boolean stock = (p.getClass().getClassLoader() == null);
1990
1991 Runnable r = () -> {};
1992 Callable<Boolean> c = () -> Boolean.TRUE;
1993
1994 class Recorder implements RejectedExecutionHandler {
1995 public volatile Runnable r = null;
1996 public volatile ThreadPoolExecutor p = null;
1997 public void reset() { r = null; p = null; }
1998 public void rejectedExecution(Runnable r, ThreadPoolExecutor p) {
1999 assertNull(this.r);
2000 assertNull(this.p);
2001 this.r = r;
2002 this.p = p;
2003 }
2004 }
2005
2006 // check custom handler is invoked exactly once per task
2007 Recorder recorder = new Recorder();
2008 setRejectedExecutionHandler(p, recorder);
2009 for (int i = 2; i--> 0; ) {
2010 recorder.reset();
2011 p.execute(r);
2012 if (stock && p.getClass() == ThreadPoolExecutor.class)
2013 assertSame(r, recorder.r);
2014 assertSame(p, recorder.p);
2015
2016 recorder.reset();
2017 assertFalse(p.submit(r).isDone());
2018 if (stock) assertTrue(!((FutureTask) recorder.r).isDone());
2019 assertSame(p, recorder.p);
2020
2021 recorder.reset();
2022 assertFalse(p.submit(r, Boolean.TRUE).isDone());
2023 if (stock) assertTrue(!((FutureTask) recorder.r).isDone());
2024 assertSame(p, recorder.p);
2025
2026 recorder.reset();
2027 assertFalse(p.submit(c).isDone());
2028 if (stock) assertTrue(!((FutureTask) recorder.r).isDone());
2029 assertSame(p, recorder.p);
2030
2031 if (p instanceof ScheduledExecutorService) {
2032 ScheduledExecutorService s = (ScheduledExecutorService) p;
2033 ScheduledFuture<?> future;
2034
2035 recorder.reset();
2036 future = s.schedule(r, randomTimeout(), randomTimeUnit());
2037 assertFalse(future.isDone());
2038 if (stock) assertTrue(!((FutureTask) recorder.r).isDone());
2039 assertSame(p, recorder.p);
2040
2041 recorder.reset();
2042 future = s.schedule(c, randomTimeout(), randomTimeUnit());
2043 assertFalse(future.isDone());
2044 if (stock) assertTrue(!((FutureTask) recorder.r).isDone());
2045 assertSame(p, recorder.p);
2046
2047 recorder.reset();
2048 future = s.scheduleAtFixedRate(r, randomTimeout(), LONG_DELAY_MS, MILLISECONDS);
2049 assertFalse(future.isDone());
2050 if (stock) assertTrue(!((FutureTask) recorder.r).isDone());
2051 assertSame(p, recorder.p);
2052
2053 recorder.reset();
2054 future = s.scheduleWithFixedDelay(r, randomTimeout(), LONG_DELAY_MS, MILLISECONDS);
2055 assertFalse(future.isDone());
2056 if (stock) assertTrue(!((FutureTask) recorder.r).isDone());
2057 assertSame(p, recorder.p);
2058 }
2059 }
2060
2061 // Checking our custom handler above should be sufficient, but
2062 // we add some integration tests of standard handlers.
2063 final AtomicReference<Thread> thread = new AtomicReference<>();
2064 final Runnable setThread = () -> thread.set(Thread.currentThread());
2065
2066 setRejectedExecutionHandler(p, new ThreadPoolExecutor.AbortPolicy());
2067 try {
2068 p.execute(setThread);
2069 shouldThrow();
2070 } catch (RejectedExecutionException success) {}
2071 assertNull(thread.get());
2072
2073 setRejectedExecutionHandler(p, new ThreadPoolExecutor.DiscardPolicy());
2074 p.execute(setThread);
2075 assertNull(thread.get());
2076
2077 setRejectedExecutionHandler(p, new ThreadPoolExecutor.CallerRunsPolicy());
2078 p.execute(setThread);
2079 if (p.isShutdown())
2080 assertNull(thread.get());
2081 else
2082 assertSame(Thread.currentThread(), thread.get());
2083
2084 setRejectedExecutionHandler(p, savedHandler);
2085
2086 // check that pool was not perturbed by handlers
2087 assertEquals(savedTaskCount, p.getTaskCount());
2088 assertEquals(savedCompletedTaskCount, p.getCompletedTaskCount());
2089 assertEquals(savedQueueSize, p.getQueue().size());
2090 }
2091
2092 void assertCollectionsEquals(Collection<?> x, Collection<?> y) {
2093 assertEquals(x, y);
2094 assertEquals(y, x);
2095 assertEquals(x.isEmpty(), y.isEmpty());
2096 assertEquals(x.size(), y.size());
2097 if (x instanceof List) {
2098 assertEquals(x.toString(), y.toString());
2099 }
2100 if (x instanceof List || x instanceof Set) {
2101 assertEquals(x.hashCode(), y.hashCode());
2102 }
2103 if (x instanceof List || x instanceof Deque) {
2104 assertTrue(Arrays.equals(x.toArray(), y.toArray()));
2105 assertTrue(Arrays.equals(x.toArray(new Object[0]),
2106 y.toArray(new Object[0])));
2107 }
2108 }
2109
2110 /**
2111 * A weaker form of assertCollectionsEquals which does not insist
2112 * that the two collections satisfy Object#equals(Object), since
2113 * they may use identity semantics as Deques do.
2114 */
2115 void assertCollectionsEquivalent(Collection<?> x, Collection<?> y) {
2116 if (x instanceof List || x instanceof Set)
2117 assertCollectionsEquals(x, y);
2118 else {
2119 assertEquals(x.isEmpty(), y.isEmpty());
2120 assertEquals(x.size(), y.size());
2121 assertEquals(new HashSet(x), new HashSet(y));
2122 if (x instanceof Deque) {
2123 assertTrue(Arrays.equals(x.toArray(), y.toArray()));
2124 assertTrue(Arrays.equals(x.toArray(new Object[0]),
2125 y.toArray(new Object[0])));
2126 }
2127 }
2128 }
2129 }