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Comparing jsr166/src/test/tck/JSR166TestCase.java (file contents):
Revision 1.69 by dl, Fri Nov 19 00:20:12 2010 UTC vs.
Revision 1.111 by dl, Sun Jul 21 22:24:18 2013 UTC

# Line 1 | Line 1
1   /*
2   * Written by Doug Lea with assistance from members of JCP JSR-166
3   * Expert Group and released to the public domain, as explained at
4 < * http://creativecommons.org/licenses/publicdomain
4 > * http://creativecommons.org/publicdomain/zero/1.0/
5   * Other contributors include Andrew Wright, Jeffrey Hayes,
6   * Pat Fisher, Mike Judd.
7   */
8  
9   import junit.framework.*;
10 + import java.io.ByteArrayInputStream;
11 + import java.io.ByteArrayOutputStream;
12 + import java.io.ObjectInputStream;
13 + import java.io.ObjectOutputStream;
14 + import java.lang.management.ManagementFactory;
15 + import java.lang.management.ThreadInfo;
16 + import java.lang.reflect.Method;
17 + import java.util.ArrayList;
18 + import java.util.Arrays;
19 + import java.util.Date;
20 + import java.util.Enumeration;
21 + import java.util.List;
22 + import java.util.NoSuchElementException;
23   import java.util.PropertyPermission;
24   import java.util.concurrent.*;
25 + import java.util.concurrent.atomic.AtomicBoolean;
26   import java.util.concurrent.atomic.AtomicReference;
27   import static java.util.concurrent.TimeUnit.MILLISECONDS;
28   import static java.util.concurrent.TimeUnit.NANOSECONDS;
# Line 61 | Line 75 | import java.security.SecurityPermission;
75   *
76   * </ol>
77   *
78 < * <p> <b>Other notes</b>
78 > * <p><b>Other notes</b>
79   * <ul>
80   *
81   * <li> Usually, there is one testcase method per JSR166 method
# Line 114 | Line 128 | public class JSR166TestCase extends Test
128      private static final long profileThreshold =
129          Long.getLong("jsr166.profileThreshold", 100);
130  
131 +    /**
132 +     * The number of repetitions per test (for tickling rare bugs).
133 +     */
134 +    private static final int runsPerTest =
135 +        Integer.getInteger("jsr166.runsPerTest", 1);
136 +
137      protected void runTest() throws Throwable {
138 <        if (profileTests)
139 <            runTestProfiled();
140 <        else
141 <            super.runTest();
138 >        for (int i = 0; i < runsPerTest; i++) {
139 >            if (profileTests)
140 >                runTestProfiled();
141 >            else
142 >                super.runTest();
143 >        }
144      }
145  
146      protected void runTestProfiled() throws Throwable {
# Line 134 | Line 156 | public class JSR166TestCase extends Test
156      }
157  
158      /**
159 <     * Runs all JSR166 unit tests using junit.textui.TestRunner
159 >     * Runs all JSR166 unit tests using junit.textui.TestRunner.
160 >     * Optional command line arg provides the number of iterations to
161 >     * repeat running the tests.
162       */
163      public static void main(String[] args) {
164          if (useSecurityManager) {
# Line 166 | Line 190 | public class JSR166TestCase extends Test
190          return suite;
191      }
192  
193 +    public static void addNamedTestClasses(TestSuite suite,
194 +                                           String... testClassNames) {
195 +        for (String testClassName : testClassNames) {
196 +            try {
197 +                Class<?> testClass = Class.forName(testClassName);
198 +                Method m = testClass.getDeclaredMethod("suite",
199 +                                                       new Class<?>[0]);
200 +                suite.addTest(newTestSuite((Test)m.invoke(null)));
201 +            } catch (Exception e) {
202 +                throw new Error("Missing test class", e);
203 +            }
204 +        }
205 +    }
206 +
207 +    public static final double JAVA_CLASS_VERSION;
208 +    static {
209 +        try {
210 +            JAVA_CLASS_VERSION = java.security.AccessController.doPrivileged(
211 +                new java.security.PrivilegedAction<Double>() {
212 +                public Double run() {
213 +                    return Double.valueOf(System.getProperty("java.class.version"));}});
214 +        } catch (Throwable t) {
215 +            throw new Error(t);
216 +        }
217 +    }
218 +
219 +    public static boolean atLeastJava6() { return JAVA_CLASS_VERSION >= 50.0; }
220 +    public static boolean atLeastJava7() { return JAVA_CLASS_VERSION >= 51.0; }
221 +    public static boolean atLeastJava8() { return JAVA_CLASS_VERSION >= 52.0; }
222 +
223      /**
224       * Collects all JSR166 unit tests as one suite.
225       */
226      public static Test suite() {
227 <        return newTestSuite(
227 >        // Java7+ test classes
228 >        TestSuite suite = newTestSuite(
229              ForkJoinPoolTest.suite(),
230              ForkJoinTaskTest.suite(),
231              RecursiveActionTest.suite(),
# Line 235 | Line 290 | public class JSR166TestCase extends Test
290              TreeSetTest.suite(),
291              TreeSubMapTest.suite(),
292              TreeSubSetTest.suite());
293 +
294 +        // Java8+ test classes
295 +        if (atLeastJava8()) {
296 +            String[] java8TestClassNames = {
297 +                "CompletableFutureTest",
298 +                "ConcurrentHashMap8Test",
299 +                "CountedCompleterTest",
300 +                "DoubleAccumulatorTest",
301 +                "DoubleAdderTest",
302 +                "ForkJoinPool8Test",
303 +                "ForkJoinTask8Test",
304 +                "LongAccumulatorTest",
305 +                "LongAdderTest",
306 +                "SplittableRandomTest",
307 +                "StampedLockTest",
308 +            };
309 +            addNamedTestClasses(suite, java8TestClassNames);
310 +        }
311 +
312 +        return suite;
313      }
314  
315 +    // Delays for timing-dependent tests, in milliseconds.
316  
317      public static long SHORT_DELAY_MS;
318      public static long SMALL_DELAY_MS;
319      public static long MEDIUM_DELAY_MS;
320      public static long LONG_DELAY_MS;
321  
246
322      /**
323       * Returns the shortest timed delay. This could
324       * be reimplemented to use for example a Property.
# Line 252 | Line 327 | public class JSR166TestCase extends Test
327          return 50;
328      }
329  
255
330      /**
331       * Sets delays as multiples of SHORT_DELAY.
332       */
# Line 260 | Line 334 | public class JSR166TestCase extends Test
334          SHORT_DELAY_MS = getShortDelay();
335          SMALL_DELAY_MS  = SHORT_DELAY_MS * 5;
336          MEDIUM_DELAY_MS = SHORT_DELAY_MS * 10;
337 <        LONG_DELAY_MS   = SHORT_DELAY_MS * 50;
337 >        LONG_DELAY_MS   = SHORT_DELAY_MS * 200;
338 >    }
339 >
340 >    /**
341 >     * Returns a timeout in milliseconds to be used in tests that
342 >     * verify that operations block or time out.
343 >     */
344 >    long timeoutMillis() {
345 >        return SHORT_DELAY_MS / 4;
346 >    }
347 >
348 >    /**
349 >     * Returns a new Date instance representing a time delayMillis
350 >     * milliseconds in the future.
351 >     */
352 >    Date delayedDate(long delayMillis) {
353 >        return new Date(System.currentTimeMillis() + delayMillis);
354      }
355  
356      /**
# Line 284 | Line 374 | public class JSR166TestCase extends Test
374      }
375  
376      /**
377 +     * Extra checks that get done for all test cases.
378 +     *
379       * Triggers test case failure if any thread assertions have failed,
380       * by rethrowing, in the test harness thread, any exception recorded
381       * earlier by threadRecordFailure.
382 +     *
383 +     * Triggers test case failure if interrupt status is set in the main thread.
384       */
385      public void tearDown() throws Exception {
386 <        Throwable t = threadFailure.getAndSet(null);
386 >        Throwable t = threadFailure.getAndSet(null);
387          if (t != null) {
388              if (t instanceof Error)
389                  throw (Error) t;
# Line 304 | Line 398 | public class JSR166TestCase extends Test
398                  throw afe;
399              }
400          }
401 +
402 +        if (Thread.interrupted())
403 +            throw new AssertionFailedError("interrupt status set in main thread");
404 +
405 +        checkForkJoinPoolThreadLeaks();
406 +    }
407 +
408 +    /**
409 +     * Find missing try { ... } finally { joinPool(e); }
410 +     */
411 +    void checkForkJoinPoolThreadLeaks() throws InterruptedException {
412 +        Thread[] survivors = new Thread[5];
413 +        int count = Thread.enumerate(survivors);
414 +        for (int i = 0; i < count; i++) {
415 +            Thread thread = survivors[i];
416 +            String name = thread.getName();
417 +            if (name.startsWith("ForkJoinPool-")) {
418 +                // give thread some time to terminate
419 +                thread.join(LONG_DELAY_MS);
420 +                if (!thread.isAlive()) continue;
421 +                thread.stop();
422 +                throw new AssertionFailedError
423 +                    (String.format("Found leaked ForkJoinPool thread test=%s thread=%s%n",
424 +                                   toString(), name));
425 +            }
426 +        }
427      }
428  
429      /**
# Line 435 | Line 555 | public class JSR166TestCase extends Test
555          else {
556              AssertionFailedError afe =
557                  new AssertionFailedError("unexpected exception: " + t);
558 <            t.initCause(t);
558 >            afe.initCause(t);
559              throw afe;
560          }
561      }
562  
563      /**
564 +     * Delays, via Thread.sleep, for the given millisecond delay, but
565 +     * if the sleep is shorter than specified, may re-sleep or yield
566 +     * until time elapses.
567 +     */
568 +    static void delay(long millis) throws InterruptedException {
569 +        long startTime = System.nanoTime();
570 +        long ns = millis * 1000 * 1000;
571 +        for (;;) {
572 +            if (millis > 0L)
573 +                Thread.sleep(millis);
574 +            else // too short to sleep
575 +                Thread.yield();
576 +            long d = ns - (System.nanoTime() - startTime);
577 +            if (d > 0L)
578 +                millis = d / (1000 * 1000);
579 +            else
580 +                break;
581 +        }
582 +    }
583 +
584 +    /**
585       * Waits out termination of a thread pool or fails doing so.
586       */
587 <    public void joinPool(ExecutorService exec) {
587 >    void joinPool(ExecutorService exec) {
588          try {
589              exec.shutdown();
590              assertTrue("ExecutorService did not terminate in a timely manner",
591 <                       exec.awaitTermination(LONG_DELAY_MS, MILLISECONDS));
591 >                       exec.awaitTermination(2 * LONG_DELAY_MS, MILLISECONDS));
592          } catch (SecurityException ok) {
593              // Allowed in case test doesn't have privs
594          } catch (InterruptedException ie) {
# Line 455 | Line 596 | public class JSR166TestCase extends Test
596          }
597      }
598  
599 +    /**
600 +     * A debugging tool to print all stack traces, as jstack does.
601 +     */
602 +    static void printAllStackTraces() {
603 +        for (ThreadInfo info :
604 +                 ManagementFactory.getThreadMXBean()
605 +                 .dumpAllThreads(true, true))
606 +            System.err.print(info);
607 +    }
608 +
609 +    /**
610 +     * Checks that thread does not terminate within the default
611 +     * millisecond delay of {@code timeoutMillis()}.
612 +     */
613 +    void assertThreadStaysAlive(Thread thread) {
614 +        assertThreadStaysAlive(thread, timeoutMillis());
615 +    }
616 +
617 +    /**
618 +     * Checks that thread does not terminate within the given millisecond delay.
619 +     */
620 +    void assertThreadStaysAlive(Thread thread, long millis) {
621 +        try {
622 +            // No need to optimize the failing case via Thread.join.
623 +            delay(millis);
624 +            assertTrue(thread.isAlive());
625 +        } catch (InterruptedException ie) {
626 +            fail("Unexpected InterruptedException");
627 +        }
628 +    }
629 +
630 +    /**
631 +     * Checks that the threads do not terminate within the default
632 +     * millisecond delay of {@code timeoutMillis()}.
633 +     */
634 +    void assertThreadsStayAlive(Thread... threads) {
635 +        assertThreadsStayAlive(timeoutMillis(), threads);
636 +    }
637 +
638 +    /**
639 +     * Checks that the threads do not terminate within the given millisecond delay.
640 +     */
641 +    void assertThreadsStayAlive(long millis, Thread... threads) {
642 +        try {
643 +            // No need to optimize the failing case via Thread.join.
644 +            delay(millis);
645 +            for (Thread thread : threads)
646 +                assertTrue(thread.isAlive());
647 +        } catch (InterruptedException ie) {
648 +            fail("Unexpected InterruptedException");
649 +        }
650 +    }
651 +
652 +    /**
653 +     * Checks that future.get times out, with the default timeout of
654 +     * {@code timeoutMillis()}.
655 +     */
656 +    void assertFutureTimesOut(Future future) {
657 +        assertFutureTimesOut(future, timeoutMillis());
658 +    }
659 +
660 +    /**
661 +     * Checks that future.get times out, with the given millisecond timeout.
662 +     */
663 +    void assertFutureTimesOut(Future future, long timeoutMillis) {
664 +        long startTime = System.nanoTime();
665 +        try {
666 +            future.get(timeoutMillis, MILLISECONDS);
667 +            shouldThrow();
668 +        } catch (TimeoutException success) {
669 +        } catch (Exception e) {
670 +            threadUnexpectedException(e);
671 +        } finally { future.cancel(true); }
672 +        assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
673 +    }
674  
675      /**
676       * Fails with message "should throw exception".
# Line 495 | Line 711 | public class JSR166TestCase extends Test
711      public static final Integer m6  = new Integer(-6);
712      public static final Integer m10 = new Integer(-10);
713  
498
714      /**
715       * Runs Runnable r with a security policy that permits precisely
716       * the specified permissions.  If there is no current security
# Line 507 | Line 722 | public class JSR166TestCase extends Test
722          SecurityManager sm = System.getSecurityManager();
723          if (sm == null) {
724              r.run();
725 +        }
726 +        runWithSecurityManagerWithPermissions(r, permissions);
727 +    }
728 +
729 +    /**
730 +     * Runs Runnable r with a security policy that permits precisely
731 +     * the specified permissions.  If there is no current security
732 +     * manager, a temporary one is set for the duration of the
733 +     * Runnable.  We require that any security manager permit
734 +     * getPolicy/setPolicy.
735 +     */
736 +    public void runWithSecurityManagerWithPermissions(Runnable r,
737 +                                                      Permission... permissions) {
738 +        SecurityManager sm = System.getSecurityManager();
739 +        if (sm == null) {
740              Policy savedPolicy = Policy.getPolicy();
741              try {
742                  Policy.setPolicy(permissivePolicy());
743                  System.setSecurityManager(new SecurityManager());
744 <                runWithPermissions(r, permissions);
744 >                runWithSecurityManagerWithPermissions(r, permissions);
745              } finally {
746                  System.setSecurityManager(null);
747                  Policy.setPolicy(savedPolicy);
# Line 559 | Line 789 | public class JSR166TestCase extends Test
789              return perms.implies(p);
790          }
791          public void refresh() {}
792 +        public String toString() {
793 +            List<Permission> ps = new ArrayList<Permission>();
794 +            for (Enumeration<Permission> e = perms.elements(); e.hasMoreElements();)
795 +                ps.add(e.nextElement());
796 +            return "AdjustablePolicy with permissions " + ps;
797 +        }
798      }
799  
800      /**
# Line 586 | Line 822 | public class JSR166TestCase extends Test
822       */
823      void sleep(long millis) {
824          try {
825 <            Thread.sleep(millis);
825 >            delay(millis);
826          } catch (InterruptedException ie) {
827              AssertionFailedError afe =
828                  new AssertionFailedError("Unexpected InterruptedException");
# Line 596 | Line 832 | public class JSR166TestCase extends Test
832      }
833  
834      /**
835 <     * Sleeps until the timeout has elapsed, or interrupted.
600 <     * Does <em>NOT</em> throw InterruptedException.
601 <     */
602 <    void sleepTillInterrupted(long timeoutMillis) {
603 <        try {
604 <            Thread.sleep(timeoutMillis);
605 <        } catch (InterruptedException wakeup) {}
606 <    }
607 <
608 <    /**
609 <     * Waits up to the specified number of milliseconds for the given
835 >     * Spin-waits up to the specified number of milliseconds for the given
836       * thread to enter a wait state: BLOCKED, WAITING, or TIMED_WAITING.
837       */
838      void waitForThreadToEnterWaitState(Thread thread, long timeoutMillis) {
839 <        long timeoutNanos = timeoutMillis * 1000L * 1000L;
614 <        long t0 = System.nanoTime();
839 >        long startTime = System.nanoTime();
840          for (;;) {
841              Thread.State s = thread.getState();
842              if (s == Thread.State.BLOCKED ||
# Line 620 | Line 845 | public class JSR166TestCase extends Test
845                  return;
846              else if (s == Thread.State.TERMINATED)
847                  fail("Unexpected thread termination");
848 <            else if (System.nanoTime() - t0 > timeoutNanos) {
848 >            else if (millisElapsedSince(startTime) > timeoutMillis) {
849                  threadAssertTrue(thread.isAlive());
850                  return;
851              }
# Line 629 | Line 854 | public class JSR166TestCase extends Test
854      }
855  
856      /**
857 +     * Waits up to LONG_DELAY_MS for the given thread to enter a wait
858 +     * state: BLOCKED, WAITING, or TIMED_WAITING.
859 +     */
860 +    void waitForThreadToEnterWaitState(Thread thread) {
861 +        waitForThreadToEnterWaitState(thread, LONG_DELAY_MS);
862 +    }
863 +
864 +    /**
865       * Returns the number of milliseconds since time given by
866       * startNanoTime, which must have been previously returned from a
867       * call to {@link System.nanoTime()}.
# Line 658 | Line 891 | public class JSR166TestCase extends Test
891          } catch (InterruptedException ie) {
892              threadUnexpectedException(ie);
893          } finally {
894 <            if (t.isAlive()) {
894 >            if (t.getState() != Thread.State.TERMINATED) {
895                  t.interrupt();
896                  fail("Test timed out");
897              }
898          }
899      }
900  
901 +    /**
902 +     * Waits for LONG_DELAY_MS milliseconds for the thread to
903 +     * terminate (using {@link Thread#join(long)}), else interrupts
904 +     * the thread (in the hope that it may terminate later) and fails.
905 +     */
906 +    void awaitTermination(Thread t) {
907 +        awaitTermination(t, LONG_DELAY_MS);
908 +    }
909 +
910      // Some convenient Runnable classes
911  
912      public abstract class CheckedRunnable implements Runnable {
# Line 727 | Line 969 | public class JSR166TestCase extends Test
969                  realRun();
970                  threadShouldThrow("InterruptedException");
971              } catch (InterruptedException success) {
972 +                threadAssertFalse(Thread.interrupted());
973              } catch (Throwable t) {
974                  threadUnexpectedException(t);
975              }
# Line 756 | Line 999 | public class JSR166TestCase extends Test
999                  threadShouldThrow("InterruptedException");
1000                  return result;
1001              } catch (InterruptedException success) {
1002 +                threadAssertFalse(Thread.interrupted());
1003              } catch (Throwable t) {
1004                  threadUnexpectedException(t);
1005              }
# Line 787 | Line 1031 | public class JSR166TestCase extends Test
1031              }};
1032      }
1033  
1034 +    public Runnable awaiter(final CountDownLatch latch) {
1035 +        return new CheckedRunnable() {
1036 +            public void realRun() throws InterruptedException {
1037 +                await(latch);
1038 +            }};
1039 +    }
1040 +
1041 +    public void await(CountDownLatch latch) {
1042 +        try {
1043 +            assertTrue(latch.await(LONG_DELAY_MS, MILLISECONDS));
1044 +        } catch (Throwable t) {
1045 +            threadUnexpectedException(t);
1046 +        }
1047 +    }
1048 +
1049 +    public void await(Semaphore semaphore) {
1050 +        try {
1051 +            assertTrue(semaphore.tryAcquire(LONG_DELAY_MS, MILLISECONDS));
1052 +        } catch (Throwable t) {
1053 +            threadUnexpectedException(t);
1054 +        }
1055 +    }
1056 +
1057 + //     /**
1058 + //      * Spin-waits up to LONG_DELAY_MS until flag becomes true.
1059 + //      */
1060 + //     public void await(AtomicBoolean flag) {
1061 + //         await(flag, LONG_DELAY_MS);
1062 + //     }
1063 +
1064 + //     /**
1065 + //      * Spin-waits up to the specified timeout until flag becomes true.
1066 + //      */
1067 + //     public void await(AtomicBoolean flag, long timeoutMillis) {
1068 + //         long startTime = System.nanoTime();
1069 + //         while (!flag.get()) {
1070 + //             if (millisElapsedSince(startTime) > timeoutMillis)
1071 + //                 throw new AssertionFailedError("timed out");
1072 + //             Thread.yield();
1073 + //         }
1074 + //     }
1075 +
1076      public static class NPETask implements Callable<String> {
1077          public String call() { throw new NullPointerException(); }
1078      }
# Line 797 | Line 1083 | public class JSR166TestCase extends Test
1083  
1084      public class ShortRunnable extends CheckedRunnable {
1085          protected void realRun() throws Throwable {
1086 <            Thread.sleep(SHORT_DELAY_MS);
1086 >            delay(SHORT_DELAY_MS);
1087          }
1088      }
1089  
1090      public class ShortInterruptedRunnable extends CheckedInterruptedRunnable {
1091          protected void realRun() throws InterruptedException {
1092 <            Thread.sleep(SHORT_DELAY_MS);
1092 >            delay(SHORT_DELAY_MS);
1093          }
1094      }
1095  
1096      public class SmallRunnable extends CheckedRunnable {
1097          protected void realRun() throws Throwable {
1098 <            Thread.sleep(SMALL_DELAY_MS);
1098 >            delay(SMALL_DELAY_MS);
1099          }
1100      }
1101  
1102      public class SmallPossiblyInterruptedRunnable extends CheckedRunnable {
1103          protected void realRun() {
1104              try {
1105 <                Thread.sleep(SMALL_DELAY_MS);
1105 >                delay(SMALL_DELAY_MS);
1106              } catch (InterruptedException ok) {}
1107          }
1108      }
1109  
1110      public class SmallCallable extends CheckedCallable {
1111          protected Object realCall() throws InterruptedException {
1112 <            Thread.sleep(SMALL_DELAY_MS);
1112 >            delay(SMALL_DELAY_MS);
1113              return Boolean.TRUE;
1114          }
1115      }
1116  
1117      public class MediumRunnable extends CheckedRunnable {
1118          protected void realRun() throws Throwable {
1119 <            Thread.sleep(MEDIUM_DELAY_MS);
1119 >            delay(MEDIUM_DELAY_MS);
1120          }
1121      }
1122  
1123      public class MediumInterruptedRunnable extends CheckedInterruptedRunnable {
1124          protected void realRun() throws InterruptedException {
1125 <            Thread.sleep(MEDIUM_DELAY_MS);
1125 >            delay(MEDIUM_DELAY_MS);
1126          }
1127      }
1128  
# Line 844 | Line 1130 | public class JSR166TestCase extends Test
1130          return new CheckedRunnable() {
1131              protected void realRun() {
1132                  try {
1133 <                    Thread.sleep(timeoutMillis);
1133 >                    delay(timeoutMillis);
1134                  } catch (InterruptedException ok) {}
1135              }};
1136      }
# Line 852 | Line 1138 | public class JSR166TestCase extends Test
1138      public class MediumPossiblyInterruptedRunnable extends CheckedRunnable {
1139          protected void realRun() {
1140              try {
1141 <                Thread.sleep(MEDIUM_DELAY_MS);
1141 >                delay(MEDIUM_DELAY_MS);
1142              } catch (InterruptedException ok) {}
1143          }
1144      }
# Line 860 | Line 1146 | public class JSR166TestCase extends Test
1146      public class LongPossiblyInterruptedRunnable extends CheckedRunnable {
1147          protected void realRun() {
1148              try {
1149 <                Thread.sleep(LONG_DELAY_MS);
1149 >                delay(LONG_DELAY_MS);
1150              } catch (InterruptedException ok) {}
1151          }
1152      }
# Line 884 | Line 1170 | public class JSR166TestCase extends Test
1170                  public boolean isDone() { return done; }
1171                  public void run() {
1172                      try {
1173 <                        Thread.sleep(timeoutMillis);
1173 >                        delay(timeoutMillis);
1174                          done = true;
1175                      } catch (InterruptedException ok) {}
1176                  }
# Line 895 | Line 1181 | public class JSR166TestCase extends Test
1181          public volatile boolean done = false;
1182          public void run() {
1183              try {
1184 <                Thread.sleep(SHORT_DELAY_MS);
1184 >                delay(SHORT_DELAY_MS);
1185                  done = true;
1186              } catch (InterruptedException ok) {}
1187          }
# Line 905 | Line 1191 | public class JSR166TestCase extends Test
1191          public volatile boolean done = false;
1192          public void run() {
1193              try {
1194 <                Thread.sleep(SMALL_DELAY_MS);
1194 >                delay(SMALL_DELAY_MS);
1195                  done = true;
1196              } catch (InterruptedException ok) {}
1197          }
# Line 915 | Line 1201 | public class JSR166TestCase extends Test
1201          public volatile boolean done = false;
1202          public void run() {
1203              try {
1204 <                Thread.sleep(MEDIUM_DELAY_MS);
1204 >                delay(MEDIUM_DELAY_MS);
1205                  done = true;
1206              } catch (InterruptedException ok) {}
1207          }
# Line 925 | Line 1211 | public class JSR166TestCase extends Test
1211          public volatile boolean done = false;
1212          public void run() {
1213              try {
1214 <                Thread.sleep(LONG_DELAY_MS);
1214 >                delay(LONG_DELAY_MS);
1215                  done = true;
1216              } catch (InterruptedException ok) {}
1217          }
# Line 942 | Line 1228 | public class JSR166TestCase extends Test
1228          public volatile boolean done = false;
1229          public Object call() {
1230              try {
1231 <                Thread.sleep(SMALL_DELAY_MS);
1231 >                delay(SMALL_DELAY_MS);
1232                  done = true;
1233              } catch (InterruptedException ok) {}
1234              return Boolean.TRUE;
# Line 955 | Line 1241 | public class JSR166TestCase extends Test
1241      public abstract class CheckedRecursiveAction extends RecursiveAction {
1242          protected abstract void realCompute() throws Throwable;
1243  
1244 <        public final void compute() {
1244 >        @Override protected final void compute() {
1245              try {
1246                  realCompute();
1247              } catch (Throwable t) {
# Line 970 | Line 1256 | public class JSR166TestCase extends Test
1256      public abstract class CheckedRecursiveTask<T> extends RecursiveTask<T> {
1257          protected abstract T realCompute() throws Throwable;
1258  
1259 <        public final T compute() {
1259 >        @Override protected final T compute() {
1260              try {
1261                  return realCompute();
1262              } catch (Throwable t) {
# Line 989 | Line 1275 | public class JSR166TestCase extends Test
1275      }
1276  
1277      /**
1278 <     * A CyclicBarrier that fails with AssertionFailedErrors instead
1279 <     * of throwing checked exceptions.
1278 >     * A CyclicBarrier that uses timed await and fails with
1279 >     * AssertionFailedErrors instead of throwing checked exceptions.
1280       */
1281      public class CheckedBarrier extends CyclicBarrier {
1282          public CheckedBarrier(int parties) { super(parties); }
1283  
1284          public int await() {
1285              try {
1286 <                return super.await();
1286 >                return super.await(2 * LONG_DELAY_MS, MILLISECONDS);
1287 >            } catch (TimeoutException e) {
1288 >                throw new AssertionFailedError("timed out");
1289              } catch (Exception e) {
1290                  AssertionFailedError afe =
1291                      new AssertionFailedError("Unexpected exception: " + e);
# Line 1007 | Line 1295 | public class JSR166TestCase extends Test
1295          }
1296      }
1297  
1298 +    void checkEmpty(BlockingQueue q) {
1299 +        try {
1300 +            assertTrue(q.isEmpty());
1301 +            assertEquals(0, q.size());
1302 +            assertNull(q.peek());
1303 +            assertNull(q.poll());
1304 +            assertNull(q.poll(0, MILLISECONDS));
1305 +            assertEquals(q.toString(), "[]");
1306 +            assertTrue(Arrays.equals(q.toArray(), new Object[0]));
1307 +            assertFalse(q.iterator().hasNext());
1308 +            try {
1309 +                q.element();
1310 +                shouldThrow();
1311 +            } catch (NoSuchElementException success) {}
1312 +            try {
1313 +                q.iterator().next();
1314 +                shouldThrow();
1315 +            } catch (NoSuchElementException success) {}
1316 +            try {
1317 +                q.remove();
1318 +                shouldThrow();
1319 +            } catch (NoSuchElementException success) {}
1320 +        } catch (InterruptedException ie) {
1321 +            threadUnexpectedException(ie);
1322 +        }
1323 +    }
1324 +
1325 +    void assertSerialEquals(Object x, Object y) {
1326 +        assertTrue(Arrays.equals(serialBytes(x), serialBytes(y)));
1327 +    }
1328 +
1329 +    void assertNotSerialEquals(Object x, Object y) {
1330 +        assertFalse(Arrays.equals(serialBytes(x), serialBytes(y)));
1331 +    }
1332 +
1333 +    byte[] serialBytes(Object o) {
1334 +        try {
1335 +            ByteArrayOutputStream bos = new ByteArrayOutputStream();
1336 +            ObjectOutputStream oos = new ObjectOutputStream(bos);
1337 +            oos.writeObject(o);
1338 +            oos.flush();
1339 +            oos.close();
1340 +            return bos.toByteArray();
1341 +        } catch (Throwable t) {
1342 +            threadUnexpectedException(t);
1343 +            return new byte[0];
1344 +        }
1345 +    }
1346 +
1347 +    @SuppressWarnings("unchecked")
1348 +    <T> T serialClone(T o) {
1349 +        try {
1350 +            ObjectInputStream ois = new ObjectInputStream
1351 +                (new ByteArrayInputStream(serialBytes(o)));
1352 +            T clone = (T) ois.readObject();
1353 +            assertSame(o.getClass(), clone.getClass());
1354 +            return clone;
1355 +        } catch (Throwable t) {
1356 +            threadUnexpectedException(t);
1357 +            return null;
1358 +        }
1359 +    }
1360 +
1361 +    public void assertThrows(Class<? extends Throwable> expectedExceptionClass,
1362 +                             Runnable... throwingActions) {
1363 +        for (Runnable throwingAction : throwingActions) {
1364 +            boolean threw = false;
1365 +            try { throwingAction.run(); }
1366 +            catch (Throwable t) {
1367 +                threw = true;
1368 +                if (!expectedExceptionClass.isInstance(t)) {
1369 +                    AssertionFailedError afe =
1370 +                        new AssertionFailedError
1371 +                        ("Expected " + expectedExceptionClass.getName() +
1372 +                         ", got " + t.getClass().getName());
1373 +                    afe.initCause(t);
1374 +                    threadUnexpectedException(afe);
1375 +                }
1376 +            }
1377 +            if (!threw)
1378 +                shouldThrow(expectedExceptionClass.getName());
1379 +        }
1380 +    }
1381   }

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