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Comparing jsr166/src/test/tck/JSR166TestCase.java (file contents):
Revision 1.65 by jsr166, Thu Oct 21 23:22:49 2010 UTC vs.
Revision 1.122 by jsr166, Wed Dec 31 16:44:02 2014 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.AtomicReference;
26   import static java.util.concurrent.TimeUnit.MILLISECONDS;
27 + import static java.util.concurrent.TimeUnit.NANOSECONDS;
28 + import java.util.regex.Pattern;
29   import java.security.CodeSource;
30   import java.security.Permission;
31   import java.security.PermissionCollection;
# Line 60 | 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 100 | Line 115 | public class JSR166TestCase extends Test
115          Boolean.getBoolean("jsr166.expensiveTests");
116  
117      /**
118 +     * If true, also run tests that are not part of the official tck
119 +     * because they test unspecified implementation details.
120 +     */
121 +    protected static final boolean testImplementationDetails =
122 +        Boolean.getBoolean("jsr166.testImplementationDetails");
123 +
124 +    /**
125       * If true, report on stdout all "slow" tests, that is, ones that
126       * take more than profileThreshold milliseconds to execute.
127       */
# Line 113 | Line 135 | public class JSR166TestCase extends Test
135      private static final long profileThreshold =
136          Long.getLong("jsr166.profileThreshold", 100);
137  
138 +    /**
139 +     * The number of repetitions per test (for tickling rare bugs).
140 +     */
141 +    private static final int runsPerTest =
142 +        Integer.getInteger("jsr166.runsPerTest", 1);
143 +
144 +    /**
145 +     * A filter for tests to run, matching strings of the form
146 +     * methodName(className), e.g. "testInvokeAll5(ForkJoinPoolTest)"
147 +     * Usefully combined with jsr166.runsPerTest.
148 +     */
149 +    private static final Pattern methodFilter = methodFilter();
150 +
151 +    private static Pattern methodFilter() {
152 +        String regex = System.getProperty("jsr166.methodFilter");
153 +        return (regex == null) ? null : Pattern.compile(regex);
154 +    }
155 +
156      protected void runTest() throws Throwable {
157 <        if (profileTests)
158 <            runTestProfiled();
159 <        else
160 <            super.runTest();
157 >        if (methodFilter == null
158 >            || methodFilter.matcher(toString()).find()) {
159 >            for (int i = 0; i < runsPerTest; i++) {
160 >                if (profileTests)
161 >                    runTestProfiled();
162 >                else
163 >                    super.runTest();
164 >            }
165 >        }
166      }
167  
168      protected void runTestProfiled() throws Throwable {
169 +        // Warmup run, notably to trigger all needed classloading.
170 +        super.runTest();
171          long t0 = System.nanoTime();
172          try {
173              super.runTest();
174          } finally {
175 <            long elapsedMillis =
129 <                (System.nanoTime() - t0) / (1000L * 1000L);
175 >            long elapsedMillis = millisElapsedSince(t0);
176              if (elapsedMillis >= profileThreshold)
177                  System.out.printf("%n%s: %d%n", toString(), elapsedMillis);
178          }
179      }
180  
181      /**
182 <     * Runs all JSR166 unit tests using junit.textui.TestRunner
182 >     * Runs all JSR166 unit tests using junit.textui.TestRunner.
183 >     * Optional command line arg provides the number of iterations to
184 >     * repeat running the tests.
185       */
186      public static void main(String[] args) {
187          if (useSecurityManager) {
# Line 165 | Line 213 | public class JSR166TestCase extends Test
213          return suite;
214      }
215  
216 +    public static void addNamedTestClasses(TestSuite suite,
217 +                                           String... testClassNames) {
218 +        for (String testClassName : testClassNames) {
219 +            try {
220 +                Class<?> testClass = Class.forName(testClassName);
221 +                Method m = testClass.getDeclaredMethod("suite",
222 +                                                       new Class<?>[0]);
223 +                suite.addTest(newTestSuite((Test)m.invoke(null)));
224 +            } catch (Exception e) {
225 +                throw new Error("Missing test class", e);
226 +            }
227 +        }
228 +    }
229 +
230 +    public static final double JAVA_CLASS_VERSION;
231 +    public static final String JAVA_SPECIFICATION_VERSION;
232 +    static {
233 +        try {
234 +            JAVA_CLASS_VERSION = java.security.AccessController.doPrivileged(
235 +                new java.security.PrivilegedAction<Double>() {
236 +                public Double run() {
237 +                    return Double.valueOf(System.getProperty("java.class.version"));}});
238 +            JAVA_SPECIFICATION_VERSION = java.security.AccessController.doPrivileged(
239 +                new java.security.PrivilegedAction<String>() {
240 +                public String run() {
241 +                    return System.getProperty("java.specification.version");}});
242 +        } catch (Throwable t) {
243 +            throw new Error(t);
244 +        }
245 +    }
246 +
247 +    public static boolean atLeastJava6() { return JAVA_CLASS_VERSION >= 50.0; }
248 +    public static boolean atLeastJava7() { return JAVA_CLASS_VERSION >= 51.0; }
249 +    public static boolean atLeastJava8() { return JAVA_CLASS_VERSION >= 52.0; }
250 +    public static boolean atLeastJava9() {
251 +        // As of 2014-05, java9 still uses 52.0 class file version
252 +        return JAVA_SPECIFICATION_VERSION.startsWith("1.9");
253 +    }
254 +
255      /**
256       * Collects all JSR166 unit tests as one suite.
257       */
258      public static Test suite() {
259 <        return newTestSuite(
259 >        // Java7+ test classes
260 >        TestSuite suite = newTestSuite(
261              ForkJoinPoolTest.suite(),
262              ForkJoinTaskTest.suite(),
263              RecursiveActionTest.suite(),
# Line 234 | Line 322 | public class JSR166TestCase extends Test
322              TreeSetTest.suite(),
323              TreeSubMapTest.suite(),
324              TreeSubSetTest.suite());
325 +
326 +        // Java8+ test classes
327 +        if (atLeastJava8()) {
328 +            String[] java8TestClassNames = {
329 +                "Atomic8Test",
330 +                "CompletableFutureTest",
331 +                "ConcurrentHashMap8Test",
332 +                "CountedCompleterTest",
333 +                "DoubleAccumulatorTest",
334 +                "DoubleAdderTest",
335 +                "ForkJoinPool8Test",
336 +                "ForkJoinTask8Test",
337 +                "LongAccumulatorTest",
338 +                "LongAdderTest",
339 +                "SplittableRandomTest",
340 +                "StampedLockTest",
341 +                "ThreadLocalRandom8Test",
342 +            };
343 +            addNamedTestClasses(suite, java8TestClassNames);
344 +        }
345 +
346 +        // Java9+ test classes
347 +        if (atLeastJava9()) {
348 +            String[] java9TestClassNames = {
349 +                "ThreadPoolExecutor9Test",
350 +            };
351 +            addNamedTestClasses(suite, java9TestClassNames);
352 +        }
353 +
354 +        return suite;
355      }
356  
357 +    // Delays for timing-dependent tests, in milliseconds.
358  
359      public static long SHORT_DELAY_MS;
360      public static long SMALL_DELAY_MS;
361      public static long MEDIUM_DELAY_MS;
362      public static long LONG_DELAY_MS;
363  
245
364      /**
365       * Returns the shortest timed delay. This could
366       * be reimplemented to use for example a Property.
# Line 251 | Line 369 | public class JSR166TestCase extends Test
369          return 50;
370      }
371  
254
372      /**
373       * Sets delays as multiples of SHORT_DELAY.
374       */
# Line 259 | Line 376 | public class JSR166TestCase extends Test
376          SHORT_DELAY_MS = getShortDelay();
377          SMALL_DELAY_MS  = SHORT_DELAY_MS * 5;
378          MEDIUM_DELAY_MS = SHORT_DELAY_MS * 10;
379 <        LONG_DELAY_MS   = SHORT_DELAY_MS * 50;
379 >        LONG_DELAY_MS   = SHORT_DELAY_MS * 200;
380 >    }
381 >
382 >    /**
383 >     * Returns a timeout in milliseconds to be used in tests that
384 >     * verify that operations block or time out.
385 >     */
386 >    long timeoutMillis() {
387 >        return SHORT_DELAY_MS / 4;
388 >    }
389 >
390 >    /**
391 >     * Returns a new Date instance representing a time delayMillis
392 >     * milliseconds in the future.
393 >     */
394 >    Date delayedDate(long delayMillis) {
395 >        return new Date(System.currentTimeMillis() + delayMillis);
396      }
397  
398      /**
# Line 283 | Line 416 | public class JSR166TestCase extends Test
416      }
417  
418      /**
419 +     * Extra checks that get done for all test cases.
420 +     *
421       * Triggers test case failure if any thread assertions have failed,
422       * by rethrowing, in the test harness thread, any exception recorded
423       * earlier by threadRecordFailure.
424 +     *
425 +     * Triggers test case failure if interrupt status is set in the main thread.
426       */
427      public void tearDown() throws Exception {
428 <        Throwable t = threadFailure.get();
428 >        Throwable t = threadFailure.getAndSet(null);
429          if (t != null) {
430              if (t instanceof Error)
431                  throw (Error) t;
# Line 303 | Line 440 | public class JSR166TestCase extends Test
440                  throw afe;
441              }
442          }
443 +
444 +        if (Thread.interrupted())
445 +            throw new AssertionFailedError("interrupt status set in main thread");
446 +
447 +        checkForkJoinPoolThreadLeaks();
448 +    }
449 +
450 +    /**
451 +     * Find missing try { ... } finally { joinPool(e); }
452 +     */
453 +    void checkForkJoinPoolThreadLeaks() throws InterruptedException {
454 +        Thread[] survivors = new Thread[5];
455 +        int count = Thread.enumerate(survivors);
456 +        for (int i = 0; i < count; i++) {
457 +            Thread thread = survivors[i];
458 +            String name = thread.getName();
459 +            if (name.startsWith("ForkJoinPool-")) {
460 +                // give thread some time to terminate
461 +                thread.join(LONG_DELAY_MS);
462 +                if (!thread.isAlive()) continue;
463 +                thread.stop();
464 +                throw new AssertionFailedError
465 +                    (String.format("Found leaked ForkJoinPool thread test=%s thread=%s%n",
466 +                                   toString(), name));
467 +            }
468 +        }
469      }
470  
471      /**
# Line 434 | Line 597 | public class JSR166TestCase extends Test
597          else {
598              AssertionFailedError afe =
599                  new AssertionFailedError("unexpected exception: " + t);
600 <            t.initCause(t);
600 >            afe.initCause(t);
601              throw afe;
602          }
603      }
604  
605      /**
606 +     * Delays, via Thread.sleep, for the given millisecond delay, but
607 +     * if the sleep is shorter than specified, may re-sleep or yield
608 +     * until time elapses.
609 +     */
610 +    static void delay(long millis) throws InterruptedException {
611 +        long startTime = System.nanoTime();
612 +        long ns = millis * 1000 * 1000;
613 +        for (;;) {
614 +            if (millis > 0L)
615 +                Thread.sleep(millis);
616 +            else // too short to sleep
617 +                Thread.yield();
618 +            long d = ns - (System.nanoTime() - startTime);
619 +            if (d > 0L)
620 +                millis = d / (1000 * 1000);
621 +            else
622 +                break;
623 +        }
624 +    }
625 +
626 +    /**
627       * Waits out termination of a thread pool or fails doing so.
628       */
629 <    public void joinPool(ExecutorService exec) {
629 >    void joinPool(ExecutorService exec) {
630          try {
631              exec.shutdown();
632 <            assertTrue("ExecutorService did not terminate in a timely manner",
633 <                       exec.awaitTermination(LONG_DELAY_MS, MILLISECONDS));
632 >            if (!exec.awaitTermination(2 * LONG_DELAY_MS, MILLISECONDS))
633 >                fail("ExecutorService " + exec +
634 >                     " did not terminate in a timely manner");
635          } catch (SecurityException ok) {
636              // Allowed in case test doesn't have privs
637          } catch (InterruptedException ie) {
# Line 454 | Line 639 | public class JSR166TestCase extends Test
639          }
640      }
641  
642 +    /**
643 +     * A debugging tool to print all stack traces, as jstack does.
644 +     */
645 +    static void printAllStackTraces() {
646 +        for (ThreadInfo info :
647 +                 ManagementFactory.getThreadMXBean()
648 +                 .dumpAllThreads(true, true))
649 +            System.err.print(info);
650 +    }
651 +
652 +    /**
653 +     * Checks that thread does not terminate within the default
654 +     * millisecond delay of {@code timeoutMillis()}.
655 +     */
656 +    void assertThreadStaysAlive(Thread thread) {
657 +        assertThreadStaysAlive(thread, timeoutMillis());
658 +    }
659 +
660 +    /**
661 +     * Checks that thread does not terminate within the given millisecond delay.
662 +     */
663 +    void assertThreadStaysAlive(Thread thread, long millis) {
664 +        try {
665 +            // No need to optimize the failing case via Thread.join.
666 +            delay(millis);
667 +            assertTrue(thread.isAlive());
668 +        } catch (InterruptedException ie) {
669 +            fail("Unexpected InterruptedException");
670 +        }
671 +    }
672 +
673 +    /**
674 +     * Checks that the threads do not terminate within the default
675 +     * millisecond delay of {@code timeoutMillis()}.
676 +     */
677 +    void assertThreadsStayAlive(Thread... threads) {
678 +        assertThreadsStayAlive(timeoutMillis(), threads);
679 +    }
680 +
681 +    /**
682 +     * Checks that the threads do not terminate within the given millisecond delay.
683 +     */
684 +    void assertThreadsStayAlive(long millis, Thread... threads) {
685 +        try {
686 +            // No need to optimize the failing case via Thread.join.
687 +            delay(millis);
688 +            for (Thread thread : threads)
689 +                assertTrue(thread.isAlive());
690 +        } catch (InterruptedException ie) {
691 +            fail("Unexpected InterruptedException");
692 +        }
693 +    }
694 +
695 +    /**
696 +     * Checks that future.get times out, with the default timeout of
697 +     * {@code timeoutMillis()}.
698 +     */
699 +    void assertFutureTimesOut(Future future) {
700 +        assertFutureTimesOut(future, timeoutMillis());
701 +    }
702 +
703 +    /**
704 +     * Checks that future.get times out, with the given millisecond timeout.
705 +     */
706 +    void assertFutureTimesOut(Future future, long timeoutMillis) {
707 +        long startTime = System.nanoTime();
708 +        try {
709 +            future.get(timeoutMillis, MILLISECONDS);
710 +            shouldThrow();
711 +        } catch (TimeoutException success) {
712 +        } catch (Exception e) {
713 +            threadUnexpectedException(e);
714 +        } finally { future.cancel(true); }
715 +        assertTrue(millisElapsedSince(startTime) >= timeoutMillis);
716 +    }
717  
718      /**
719       * Fails with message "should throw exception".
# Line 494 | Line 754 | public class JSR166TestCase extends Test
754      public static final Integer m6  = new Integer(-6);
755      public static final Integer m10 = new Integer(-10);
756  
497
757      /**
758       * Runs Runnable r with a security policy that permits precisely
759       * the specified permissions.  If there is no current security
# Line 506 | Line 765 | public class JSR166TestCase extends Test
765          SecurityManager sm = System.getSecurityManager();
766          if (sm == null) {
767              r.run();
768 +        }
769 +        runWithSecurityManagerWithPermissions(r, permissions);
770 +    }
771 +
772 +    /**
773 +     * Runs Runnable r with a security policy that permits precisely
774 +     * the specified permissions.  If there is no current security
775 +     * manager, a temporary one is set for the duration of the
776 +     * Runnable.  We require that any security manager permit
777 +     * getPolicy/setPolicy.
778 +     */
779 +    public void runWithSecurityManagerWithPermissions(Runnable r,
780 +                                                      Permission... permissions) {
781 +        SecurityManager sm = System.getSecurityManager();
782 +        if (sm == null) {
783              Policy savedPolicy = Policy.getPolicy();
784              try {
785                  Policy.setPolicy(permissivePolicy());
786                  System.setSecurityManager(new SecurityManager());
787 <                runWithPermissions(r, permissions);
787 >                runWithSecurityManagerWithPermissions(r, permissions);
788              } finally {
789                  System.setSecurityManager(null);
790                  Policy.setPolicy(savedPolicy);
# Line 558 | Line 832 | public class JSR166TestCase extends Test
832              return perms.implies(p);
833          }
834          public void refresh() {}
835 +        public String toString() {
836 +            List<Permission> ps = new ArrayList<Permission>();
837 +            for (Enumeration<Permission> e = perms.elements(); e.hasMoreElements();)
838 +                ps.add(e.nextElement());
839 +            return "AdjustablePolicy with permissions " + ps;
840 +        }
841      }
842  
843      /**
# Line 585 | Line 865 | public class JSR166TestCase extends Test
865       */
866      void sleep(long millis) {
867          try {
868 <            Thread.sleep(millis);
868 >            delay(millis);
869          } catch (InterruptedException ie) {
870              AssertionFailedError afe =
871                  new AssertionFailedError("Unexpected InterruptedException");
# Line 595 | Line 875 | public class JSR166TestCase extends Test
875      }
876  
877      /**
878 <     * Sleeps until the timeout has elapsed, or interrupted.
599 <     * Does <em>NOT</em> throw InterruptedException.
600 <     */
601 <    void sleepTillInterrupted(long timeoutMillis) {
602 <        try {
603 <            Thread.sleep(timeoutMillis);
604 <        } catch (InterruptedException wakeup) {}
605 <    }
606 <
607 <    /**
608 <     * Waits up to the specified number of milliseconds for the given
878 >     * Spin-waits up to the specified number of milliseconds for the given
879       * thread to enter a wait state: BLOCKED, WAITING, or TIMED_WAITING.
880       */
881      void waitForThreadToEnterWaitState(Thread thread, long timeoutMillis) {
882 <        long timeoutNanos = timeoutMillis * 1000L * 1000L;
613 <        long t0 = System.nanoTime();
882 >        long startTime = System.nanoTime();
883          for (;;) {
884              Thread.State s = thread.getState();
885              if (s == Thread.State.BLOCKED ||
886                  s == Thread.State.WAITING ||
887 <                s == Thread.State.TIMED_WAITING ||
619 <                System.nanoTime() - t0 > timeoutNanos)
887 >                s == Thread.State.TIMED_WAITING)
888                  return;
889 +            else if (s == Thread.State.TERMINATED)
890 +                fail("Unexpected thread termination");
891 +            else if (millisElapsedSince(startTime) > timeoutMillis) {
892 +                threadAssertTrue(thread.isAlive());
893 +                return;
894 +            }
895              Thread.yield();
896          }
897      }
898  
899      /**
900 +     * Waits up to LONG_DELAY_MS for the given thread to enter a wait
901 +     * state: BLOCKED, WAITING, or TIMED_WAITING.
902 +     */
903 +    void waitForThreadToEnterWaitState(Thread thread) {
904 +        waitForThreadToEnterWaitState(thread, LONG_DELAY_MS);
905 +    }
906 +
907 +    /**
908 +     * Returns the number of milliseconds since time given by
909 +     * startNanoTime, which must have been previously returned from a
910 +     * call to {@link System.nanoTime()}.
911 +     */
912 +    static long millisElapsedSince(long startNanoTime) {
913 +        return NANOSECONDS.toMillis(System.nanoTime() - startNanoTime);
914 +    }
915 +
916 + //     void assertTerminatesPromptly(long timeoutMillis, Runnable r) {
917 + //         long startTime = System.nanoTime();
918 + //         try {
919 + //             r.run();
920 + //         } catch (Throwable fail) { threadUnexpectedException(fail); }
921 + //         if (millisElapsedSince(startTime) > timeoutMillis/2)
922 + //             throw new AssertionFailedError("did not return promptly");
923 + //     }
924 +
925 + //     void assertTerminatesPromptly(Runnable r) {
926 + //         assertTerminatesPromptly(LONG_DELAY_MS/2, r);
927 + //     }
928 +
929 +    /**
930 +     * Checks that timed f.get() returns the expected value, and does not
931 +     * wait for the timeout to elapse before returning.
932 +     */
933 +    <T> void checkTimedGet(Future<T> f, T expectedValue, long timeoutMillis) {
934 +        long startTime = System.nanoTime();
935 +        try {
936 +            assertEquals(expectedValue, f.get(timeoutMillis, MILLISECONDS));
937 +        } catch (Throwable fail) { threadUnexpectedException(fail); }
938 +        if (millisElapsedSince(startTime) > timeoutMillis/2)
939 +            throw new AssertionFailedError("timed get did not return promptly");
940 +    }
941 +
942 +    <T> void checkTimedGet(Future<T> f, T expectedValue) {
943 +        checkTimedGet(f, expectedValue, LONG_DELAY_MS);
944 +    }
945 +
946 +    /**
947       * Returns a new started daemon Thread running the given runnable.
948       */
949      Thread newStartedThread(Runnable runnable) {
# Line 643 | Line 964 | public class JSR166TestCase extends Test
964          } catch (InterruptedException ie) {
965              threadUnexpectedException(ie);
966          } finally {
967 <            if (t.isAlive()) {
967 >            if (t.getState() != Thread.State.TERMINATED) {
968                  t.interrupt();
969                  fail("Test timed out");
970              }
971          }
972      }
973  
974 +    /**
975 +     * Waits for LONG_DELAY_MS milliseconds for the thread to
976 +     * terminate (using {@link Thread#join(long)}), else interrupts
977 +     * the thread (in the hope that it may terminate later) and fails.
978 +     */
979 +    void awaitTermination(Thread t) {
980 +        awaitTermination(t, LONG_DELAY_MS);
981 +    }
982 +
983      // Some convenient Runnable classes
984  
985      public abstract class CheckedRunnable implements Runnable {
# Line 712 | Line 1042 | public class JSR166TestCase extends Test
1042                  realRun();
1043                  threadShouldThrow("InterruptedException");
1044              } catch (InterruptedException success) {
1045 +                threadAssertFalse(Thread.interrupted());
1046              } catch (Throwable t) {
1047                  threadUnexpectedException(t);
1048              }
# Line 741 | Line 1072 | public class JSR166TestCase extends Test
1072                  threadShouldThrow("InterruptedException");
1073                  return result;
1074              } catch (InterruptedException success) {
1075 +                threadAssertFalse(Thread.interrupted());
1076              } catch (Throwable t) {
1077                  threadUnexpectedException(t);
1078              }
# Line 772 | Line 1104 | public class JSR166TestCase extends Test
1104              }};
1105      }
1106  
1107 +    public Runnable awaiter(final CountDownLatch latch) {
1108 +        return new CheckedRunnable() {
1109 +            public void realRun() throws InterruptedException {
1110 +                await(latch);
1111 +            }};
1112 +    }
1113 +
1114 +    public void await(CountDownLatch latch) {
1115 +        try {
1116 +            assertTrue(latch.await(LONG_DELAY_MS, MILLISECONDS));
1117 +        } catch (Throwable t) {
1118 +            threadUnexpectedException(t);
1119 +        }
1120 +    }
1121 +
1122 +    public void await(Semaphore semaphore) {
1123 +        try {
1124 +            assertTrue(semaphore.tryAcquire(LONG_DELAY_MS, MILLISECONDS));
1125 +        } catch (Throwable t) {
1126 +            threadUnexpectedException(t);
1127 +        }
1128 +    }
1129 +
1130 + //     /**
1131 + //      * Spin-waits up to LONG_DELAY_MS until flag becomes true.
1132 + //      */
1133 + //     public void await(AtomicBoolean flag) {
1134 + //         await(flag, LONG_DELAY_MS);
1135 + //     }
1136 +
1137 + //     /**
1138 + //      * Spin-waits up to the specified timeout until flag becomes true.
1139 + //      */
1140 + //     public void await(AtomicBoolean flag, long timeoutMillis) {
1141 + //         long startTime = System.nanoTime();
1142 + //         while (!flag.get()) {
1143 + //             if (millisElapsedSince(startTime) > timeoutMillis)
1144 + //                 throw new AssertionFailedError("timed out");
1145 + //             Thread.yield();
1146 + //         }
1147 + //     }
1148 +
1149      public static class NPETask implements Callable<String> {
1150          public String call() { throw new NullPointerException(); }
1151      }
# Line 782 | Line 1156 | public class JSR166TestCase extends Test
1156  
1157      public class ShortRunnable extends CheckedRunnable {
1158          protected void realRun() throws Throwable {
1159 <            Thread.sleep(SHORT_DELAY_MS);
1159 >            delay(SHORT_DELAY_MS);
1160          }
1161      }
1162  
1163      public class ShortInterruptedRunnable extends CheckedInterruptedRunnable {
1164          protected void realRun() throws InterruptedException {
1165 <            Thread.sleep(SHORT_DELAY_MS);
1165 >            delay(SHORT_DELAY_MS);
1166          }
1167      }
1168  
1169      public class SmallRunnable extends CheckedRunnable {
1170          protected void realRun() throws Throwable {
1171 <            Thread.sleep(SMALL_DELAY_MS);
1171 >            delay(SMALL_DELAY_MS);
1172          }
1173      }
1174  
1175      public class SmallPossiblyInterruptedRunnable extends CheckedRunnable {
1176          protected void realRun() {
1177              try {
1178 <                Thread.sleep(SMALL_DELAY_MS);
1178 >                delay(SMALL_DELAY_MS);
1179              } catch (InterruptedException ok) {}
1180          }
1181      }
1182  
1183      public class SmallCallable extends CheckedCallable {
1184          protected Object realCall() throws InterruptedException {
1185 <            Thread.sleep(SMALL_DELAY_MS);
1185 >            delay(SMALL_DELAY_MS);
1186              return Boolean.TRUE;
1187          }
1188      }
1189  
1190      public class MediumRunnable extends CheckedRunnable {
1191          protected void realRun() throws Throwable {
1192 <            Thread.sleep(MEDIUM_DELAY_MS);
1192 >            delay(MEDIUM_DELAY_MS);
1193          }
1194      }
1195  
1196      public class MediumInterruptedRunnable extends CheckedInterruptedRunnable {
1197          protected void realRun() throws InterruptedException {
1198 <            Thread.sleep(MEDIUM_DELAY_MS);
1198 >            delay(MEDIUM_DELAY_MS);
1199          }
1200      }
1201  
# Line 829 | Line 1203 | public class JSR166TestCase extends Test
1203          return new CheckedRunnable() {
1204              protected void realRun() {
1205                  try {
1206 <                    Thread.sleep(timeoutMillis);
1206 >                    delay(timeoutMillis);
1207                  } catch (InterruptedException ok) {}
1208              }};
1209      }
# Line 837 | Line 1211 | public class JSR166TestCase extends Test
1211      public class MediumPossiblyInterruptedRunnable extends CheckedRunnable {
1212          protected void realRun() {
1213              try {
1214 <                Thread.sleep(MEDIUM_DELAY_MS);
1214 >                delay(MEDIUM_DELAY_MS);
1215              } catch (InterruptedException ok) {}
1216          }
1217      }
# Line 845 | Line 1219 | public class JSR166TestCase extends Test
1219      public class LongPossiblyInterruptedRunnable extends CheckedRunnable {
1220          protected void realRun() {
1221              try {
1222 <                Thread.sleep(LONG_DELAY_MS);
1222 >                delay(LONG_DELAY_MS);
1223              } catch (InterruptedException ok) {}
1224          }
1225      }
# Line 869 | Line 1243 | public class JSR166TestCase extends Test
1243                  public boolean isDone() { return done; }
1244                  public void run() {
1245                      try {
1246 <                        Thread.sleep(timeoutMillis);
1246 >                        delay(timeoutMillis);
1247                          done = true;
1248                      } catch (InterruptedException ok) {}
1249                  }
# Line 880 | Line 1254 | public class JSR166TestCase extends Test
1254          public volatile boolean done = false;
1255          public void run() {
1256              try {
1257 <                Thread.sleep(SHORT_DELAY_MS);
1257 >                delay(SHORT_DELAY_MS);
1258                  done = true;
1259              } catch (InterruptedException ok) {}
1260          }
# Line 890 | Line 1264 | public class JSR166TestCase extends Test
1264          public volatile boolean done = false;
1265          public void run() {
1266              try {
1267 <                Thread.sleep(SMALL_DELAY_MS);
1267 >                delay(SMALL_DELAY_MS);
1268                  done = true;
1269              } catch (InterruptedException ok) {}
1270          }
# Line 900 | Line 1274 | public class JSR166TestCase extends Test
1274          public volatile boolean done = false;
1275          public void run() {
1276              try {
1277 <                Thread.sleep(MEDIUM_DELAY_MS);
1277 >                delay(MEDIUM_DELAY_MS);
1278                  done = true;
1279              } catch (InterruptedException ok) {}
1280          }
# Line 910 | Line 1284 | public class JSR166TestCase extends Test
1284          public volatile boolean done = false;
1285          public void run() {
1286              try {
1287 <                Thread.sleep(LONG_DELAY_MS);
1287 >                delay(LONG_DELAY_MS);
1288                  done = true;
1289              } catch (InterruptedException ok) {}
1290          }
# Line 927 | Line 1301 | public class JSR166TestCase extends Test
1301          public volatile boolean done = false;
1302          public Object call() {
1303              try {
1304 <                Thread.sleep(SMALL_DELAY_MS);
1304 >                delay(SMALL_DELAY_MS);
1305                  done = true;
1306              } catch (InterruptedException ok) {}
1307              return Boolean.TRUE;
# Line 940 | Line 1314 | public class JSR166TestCase extends Test
1314      public abstract class CheckedRecursiveAction extends RecursiveAction {
1315          protected abstract void realCompute() throws Throwable;
1316  
1317 <        public final void compute() {
1317 >        @Override protected final void compute() {
1318              try {
1319                  realCompute();
1320              } catch (Throwable t) {
# Line 955 | Line 1329 | public class JSR166TestCase extends Test
1329      public abstract class CheckedRecursiveTask<T> extends RecursiveTask<T> {
1330          protected abstract T realCompute() throws Throwable;
1331  
1332 <        public final T compute() {
1332 >        @Override protected final T compute() {
1333              try {
1334                  return realCompute();
1335              } catch (Throwable t) {
# Line 974 | Line 1348 | public class JSR166TestCase extends Test
1348      }
1349  
1350      /**
1351 <     * A CyclicBarrier that fails with AssertionFailedErrors instead
1352 <     * of throwing checked exceptions.
1351 >     * A CyclicBarrier that uses timed await and fails with
1352 >     * AssertionFailedErrors instead of throwing checked exceptions.
1353       */
1354      public class CheckedBarrier extends CyclicBarrier {
1355          public CheckedBarrier(int parties) { super(parties); }
1356  
1357          public int await() {
1358              try {
1359 <                return super.await();
1359 >                return super.await(2 * LONG_DELAY_MS, MILLISECONDS);
1360 >            } catch (TimeoutException e) {
1361 >                throw new AssertionFailedError("timed out");
1362              } catch (Exception e) {
1363                  AssertionFailedError afe =
1364                      new AssertionFailedError("Unexpected exception: " + e);
# Line 992 | Line 1368 | public class JSR166TestCase extends Test
1368          }
1369      }
1370  
1371 +    void checkEmpty(BlockingQueue q) {
1372 +        try {
1373 +            assertTrue(q.isEmpty());
1374 +            assertEquals(0, q.size());
1375 +            assertNull(q.peek());
1376 +            assertNull(q.poll());
1377 +            assertNull(q.poll(0, MILLISECONDS));
1378 +            assertEquals(q.toString(), "[]");
1379 +            assertTrue(Arrays.equals(q.toArray(), new Object[0]));
1380 +            assertFalse(q.iterator().hasNext());
1381 +            try {
1382 +                q.element();
1383 +                shouldThrow();
1384 +            } catch (NoSuchElementException success) {}
1385 +            try {
1386 +                q.iterator().next();
1387 +                shouldThrow();
1388 +            } catch (NoSuchElementException success) {}
1389 +            try {
1390 +                q.remove();
1391 +                shouldThrow();
1392 +            } catch (NoSuchElementException success) {}
1393 +        } catch (InterruptedException ie) {
1394 +            threadUnexpectedException(ie);
1395 +        }
1396 +    }
1397 +
1398 +    void assertSerialEquals(Object x, Object y) {
1399 +        assertTrue(Arrays.equals(serialBytes(x), serialBytes(y)));
1400 +    }
1401 +
1402 +    void assertNotSerialEquals(Object x, Object y) {
1403 +        assertFalse(Arrays.equals(serialBytes(x), serialBytes(y)));
1404 +    }
1405 +
1406 +    byte[] serialBytes(Object o) {
1407 +        try {
1408 +            ByteArrayOutputStream bos = new ByteArrayOutputStream();
1409 +            ObjectOutputStream oos = new ObjectOutputStream(bos);
1410 +            oos.writeObject(o);
1411 +            oos.flush();
1412 +            oos.close();
1413 +            return bos.toByteArray();
1414 +        } catch (Throwable t) {
1415 +            threadUnexpectedException(t);
1416 +            return new byte[0];
1417 +        }
1418 +    }
1419 +
1420 +    @SuppressWarnings("unchecked")
1421 +    <T> T serialClone(T o) {
1422 +        try {
1423 +            ObjectInputStream ois = new ObjectInputStream
1424 +                (new ByteArrayInputStream(serialBytes(o)));
1425 +            T clone = (T) ois.readObject();
1426 +            assertSame(o.getClass(), clone.getClass());
1427 +            return clone;
1428 +        } catch (Throwable t) {
1429 +            threadUnexpectedException(t);
1430 +            return null;
1431 +        }
1432 +    }
1433 +
1434 +    public void assertThrows(Class<? extends Throwable> expectedExceptionClass,
1435 +                             Runnable... throwingActions) {
1436 +        for (Runnable throwingAction : throwingActions) {
1437 +            boolean threw = false;
1438 +            try { throwingAction.run(); }
1439 +            catch (Throwable t) {
1440 +                threw = true;
1441 +                if (!expectedExceptionClass.isInstance(t)) {
1442 +                    AssertionFailedError afe =
1443 +                        new AssertionFailedError
1444 +                        ("Expected " + expectedExceptionClass.getName() +
1445 +                         ", got " + t.getClass().getName());
1446 +                    afe.initCause(t);
1447 +                    threadUnexpectedException(afe);
1448 +                }
1449 +            }
1450 +            if (!threw)
1451 +                shouldThrow(expectedExceptionClass.getName());
1452 +        }
1453 +    }
1454   }

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