--- jsr166/src/test/tck/ScheduledExecutorTest.java	2003/08/31 19:24:55	1.1
+++ jsr166/src/test/tck/ScheduledExecutorTest.java	2011/05/06 11:22:07	1.39
@@ -1,263 +1,1179 @@
 /*
- * Written by members of JCP JSR-166 Expert Group and released to the
- * public domain. Use, modify, and redistribute this code in any way
- * without acknowledgement. Other contributors include Andrew Wright,
- * Jeffrey Hayes, Pat Fischer, Mike Judd.
+ * Written by Doug Lea with assistance from members of JCP JSR-166
+ * Expert Group and released to the public domain, as explained at
+ * http://creativecommons.org/publicdomain/zero/1.0/
+ * Other contributors include Andrew Wright, Jeffrey Hayes,
+ * Pat Fisher, Mike Judd.
  */
 
 import junit.framework.*;
 import java.util.*;
 import java.util.concurrent.*;
+import static java.util.concurrent.TimeUnit.MILLISECONDS;
+import java.util.concurrent.atomic.*;
 
-public class ScheduledExecutorTest extends TestCase{
-    
-    boolean flag = false;
-
+public class ScheduledExecutorTest extends JSR166TestCase {
     public static void main(String[] args) {
-	junit.textui.TestRunner.run (suite());	
+        junit.textui.TestRunner.run(suite());
     }
-    
-
     public static Test suite() {
-	return new TestSuite(ScheduledExecutorTest.class);
+        return new TestSuite(ScheduledExecutorTest.class);
     }
 
-    private static long SHORT_DELAY_MS = 100; 
-    private static long MEDIUM_DELAY_MS = 1000;
-    private static long LONG_DELAY_MS = 10000; 
-
-    static class MyRunnable implements Runnable {
-        volatile boolean waiting = true;
-        volatile boolean done = false;
-        public void run(){
-            try{
-                Thread.sleep(MEDIUM_DELAY_MS);
-                waiting = false;
-                done = true;
-            } catch(Exception e){}
-        }
-    }
-
-    static class MyCallable implements Callable {
-        volatile boolean waiting = true;
-        volatile boolean done = false;
-        public Object call(){
-            try{
-                Thread.sleep(MEDIUM_DELAY_MS);
-                waiting = false;
-                done = true;
-            }catch(Exception e){}
-            return Boolean.TRUE;
-        }
-    }
-
-    /**
-     *  Test to verify execute successfully runs the given Runnable
-     */
-    public void testExecute(){
-	try{
-            MyRunnable runnable =new MyRunnable();
-            ScheduledExecutor one = new ScheduledExecutor(1);
-	    one.execute(runnable);
-	    Thread.sleep(100);
-	    assertTrue(runnable.waiting);
-	    one.shutdown();
-            // make sure the Runnable has time to complete
-	    try{Thread.sleep(1010);}catch(InterruptedException e){}
-            assertFalse(runnable.waiting);
-	    assertTrue(runnable.done);
-            one.shutdown();
-        }
-	catch(Exception e){
-            fail("unexpected exception");
-        }
-    }
-
-    /**
-     *  Test to verify schedule successfully runs the given Callable.
-     *  The waiting flag shows that the Callable is not started until
-     *  immediately.
-     */
-    public void testSchedule1(){
-	try{
-            MyCallable callable = new MyCallable();
-            ScheduledExecutor one = new ScheduledExecutor(1);
-	    Future f = one.schedule(callable, 500, TimeUnit.MILLISECONDS);
-            //	    Thread.sleep(505);
-	    assertTrue(callable.waiting);
-	    Thread.sleep(2000);
-	    assertTrue(callable.done);
-	    assertEquals(Boolean.TRUE, f.get());
-            one.shutdown();
-	}catch(RejectedExecutionException e){}
-	catch(Exception e){}
-    }
-
-    /**
-     *  Another version of schedule, only using Runnable instead of Callable
-     */
-    public void testSchedule3(){
-	try{
-            MyRunnable runnable = new MyRunnable();
-            ScheduledExecutor one = new ScheduledExecutor(1);
-	    one.schedule(runnable, 500, TimeUnit.MILLISECONDS);
-	    Thread.sleep(50);
-	    assertTrue(runnable.waiting);
-	    Thread.sleep(2000);
-	    assertTrue(runnable.done);
-            one.shutdown();
-        } catch(Exception e){
-            fail("unexpected exception");
-        }
-    }
-    
-    /**
-     *  The final version of schedule, using both long, TimeUnit and Runnable
-     */
-    public void testSchedule4(){
-	try{
-            MyRunnable runnable = new MyRunnable();
-            ScheduledExecutor one = new ScheduledExecutor(1);
-	    one.schedule(runnable, 500, TimeUnit.MILLISECONDS);
-            //	    Thread.sleep(505);
-	    assertTrue(runnable.waiting);
-	    Thread.sleep(2000);
-	    assertTrue(runnable.done);
-            one.shutdown();
-        } catch(Exception e){
-            fail("unexpected exception");
-        }
-    }
-    
-   
-    // exception tests
-
-    /**
-     *  Test to verify schedule(Runnable, long) throws RejectedExecutionException
-     *  This occurs on an attempt to schedule a task on a shutdown executor
-     */
-    public void testSchedule1_RejectedExecutionException(){
-        try{
-            ScheduledExecutor se = new ScheduledExecutor(1);
-            se.shutdown();
-            se.schedule(new Runnable(){
-                    public void run(){}
-                }, 10000, TimeUnit.MILLISECONDS);
-            fail("shoud throw");
-        }catch(RejectedExecutionException e){}    
+
+    /**
+     * execute successfully executes a runnable
+     */
+    public void testExecute() throws InterruptedException {
+        ScheduledThreadPoolExecutor p = new ScheduledThreadPoolExecutor(1);
+        final CountDownLatch done = new CountDownLatch(1);
+        final Runnable task = new CheckedRunnable() {
+            public void realRun() {
+                done.countDown();
+            }};
+        try {
+            p.execute(task);
+            assertTrue(done.await(SMALL_DELAY_MS, MILLISECONDS));
+        } finally {
+            joinPool(p);
+        }
     }
 
+
     /**
-     *  Test to verify schedule(Callable, long, TimeUnit) throws RejectedExecutionException
-     *  This occurs on an attempt to schedule a task on a shutdown executor
+     * delayed schedule of callable successfully executes after delay
      */
-    public void testSchedule2_RejectedExecutionException(){
-        try{
-            ScheduledExecutor se = new ScheduledExecutor(1);
-            se.shutdown();
-            se.schedule(new Callable(){
-                    public Object call(){ 
-                        return Boolean.TRUE;
-                    }
-                }, (long)100, TimeUnit.SECONDS);
-            fail("should throw");
-        }catch(RejectedExecutionException e){}    
+    public void testSchedule1() throws Exception {
+        ScheduledThreadPoolExecutor p = new ScheduledThreadPoolExecutor(1);
+        final long t0 = System.nanoTime();
+        final long timeoutNanos = SHORT_DELAY_MS * 1000L * 1000L;
+        final CountDownLatch done = new CountDownLatch(1);
+        try {
+            Callable task = new CheckedCallable<Boolean>() {
+                public Boolean realCall() {
+                    done.countDown();
+                    assertTrue(System.nanoTime() - t0 >= timeoutNanos);
+                    return Boolean.TRUE;
+                }};
+            Future f = p.schedule(task, SHORT_DELAY_MS, MILLISECONDS);
+            assertEquals(Boolean.TRUE, f.get());
+            assertTrue(System.nanoTime() - t0 >= timeoutNanos);
+            assertTrue(done.await(0L, MILLISECONDS));
+        } finally {
+            joinPool(p);
+        }
     }
 
     /**
-     *  Test to verify schedule(Callable, long) throws RejectedExecutionException
-     *  This occurs on an attempt to schedule a task on a shutdown executor
-     */
-     public void testSchedule3_RejectedExecutionException(){
-        try{
-            ScheduledExecutor se = new ScheduledExecutor(1);
-            se.shutdown();
-            se.schedule(new Callable(){
-                    public Object call(){ 
-                        return Boolean.TRUE;
-                    }
-                },  10000, TimeUnit.MILLISECONDS);
-            fail("should throw");
-        }catch(RejectedExecutionException e){}    
+     * delayed schedule of runnable successfully executes after delay
+     */
+    public void testSchedule3() throws Exception {
+        ScheduledThreadPoolExecutor p = new ScheduledThreadPoolExecutor(1);
+        final long t0 = System.nanoTime();
+        final long timeoutNanos = SHORT_DELAY_MS * 1000L * 1000L;
+        final CountDownLatch done = new CountDownLatch(1);
+        try {
+            Runnable task = new CheckedRunnable() {
+                public void realRun() {
+                    done.countDown();
+                    assertTrue(System.nanoTime() - t0 >= timeoutNanos);
+                }};
+            Future f = p.schedule(task, SHORT_DELAY_MS, MILLISECONDS);
+            assertNull(f.get());
+            assertTrue(System.nanoTime() - t0 >= timeoutNanos);
+            assertTrue(done.await(0L, MILLISECONDS));
+        } finally {
+            joinPool(p);
+        }
     }
 
     /**
-     *  Test to verify scheduleAtFixedRate(Runnable, long, long, TimeUnit) throws 
-     *  RejectedExecutionException.
-     *  This occurs on an attempt to schedule a task on a shutdown executor
-     */
-    public void testScheduleAtFixedRate1_RejectedExecutionException(){
-        try{
-            ScheduledExecutor se = new ScheduledExecutor(1);
+     * scheduleAtFixedRate executes runnable after given initial delay
+     */
+    public void testSchedule4() throws Exception {
+        ScheduledThreadPoolExecutor p = new ScheduledThreadPoolExecutor(1);
+        final long t0 = System.nanoTime();
+        final long timeoutNanos = SHORT_DELAY_MS * 1000L * 1000L;
+        final CountDownLatch done = new CountDownLatch(1);
+        try {
+            Runnable task = new CheckedRunnable() {
+                public void realRun() {
+                    done.countDown();
+                    assertTrue(System.nanoTime() - t0 >= timeoutNanos);
+                }};
+            ScheduledFuture f =
+                p.scheduleAtFixedRate(task, SHORT_DELAY_MS,
+                                      SHORT_DELAY_MS, MILLISECONDS);
+            assertTrue(done.await(SMALL_DELAY_MS, MILLISECONDS));
+            assertTrue(System.nanoTime() - t0 >= timeoutNanos);
+            f.cancel(true);
+        } finally {
+            joinPool(p);
+        }
+    }
+
+    /**
+     * scheduleWithFixedDelay executes runnable after given initial delay
+     */
+    public void testSchedule5() throws InterruptedException {
+        ScheduledThreadPoolExecutor p = new ScheduledThreadPoolExecutor(1);
+        final long t0 = System.nanoTime();
+        final long timeoutNanos = SHORT_DELAY_MS * 1000L * 1000L;
+        final CountDownLatch done = new CountDownLatch(1);
+        try {
+            Runnable task = new CheckedRunnable() {
+                public void realRun() {
+                    done.countDown();
+                    assertTrue(System.nanoTime() - t0 >= timeoutNanos);
+                }};
+            ScheduledFuture f =
+                p.scheduleWithFixedDelay(task, SHORT_DELAY_MS,
+                                         SHORT_DELAY_MS, MILLISECONDS);
+            assertTrue(done.await(SMALL_DELAY_MS, MILLISECONDS));
+            assertTrue(System.nanoTime() - t0 >= timeoutNanos);
+            f.cancel(true);
+        } finally {
+            joinPool(p);
+        }
+    }
+
+    static class RunnableCounter implements Runnable {
+        AtomicInteger count = new AtomicInteger(0);
+        public void run() { count.getAndIncrement(); }
+    }
+
+    /**
+     * scheduleAtFixedRate executes series of tasks at given rate
+     */
+    public void testFixedRateSequence() throws InterruptedException {
+        ScheduledThreadPoolExecutor p = new ScheduledThreadPoolExecutor(1);
+        RunnableCounter counter = new RunnableCounter();
+        ScheduledFuture h =
+            p.scheduleAtFixedRate(counter, 0, 1, MILLISECONDS);
+        delay(SMALL_DELAY_MS);
+        h.cancel(true);
+        int c = counter.count.get();
+        // By time scaling conventions, we must have at least
+        // an execution per SHORT delay, but no more than one SHORT more
+        assertTrue(c >= SMALL_DELAY_MS / SHORT_DELAY_MS);
+        assertTrue(c <= SMALL_DELAY_MS + SHORT_DELAY_MS);
+        joinPool(p);
+    }
+
+    /**
+     * scheduleWithFixedDelay executes series of tasks with given period
+     */
+    public void testFixedDelaySequence() throws InterruptedException {
+        ScheduledThreadPoolExecutor p = new ScheduledThreadPoolExecutor(1);
+        RunnableCounter counter = new RunnableCounter();
+        ScheduledFuture h =
+            p.scheduleWithFixedDelay(counter, 0, 1, MILLISECONDS);
+        delay(SMALL_DELAY_MS);
+        h.cancel(true);
+        int c = counter.count.get();
+        assertTrue(c >= SMALL_DELAY_MS / SHORT_DELAY_MS);
+        assertTrue(c <= SMALL_DELAY_MS + SHORT_DELAY_MS);
+        joinPool(p);
+    }
+
+
+    /**
+     * execute(null) throws NPE
+     */
+    public void testExecuteNull() throws InterruptedException {
+        ScheduledThreadPoolExecutor se = null;
+        try {
+            se = new ScheduledThreadPoolExecutor(1);
+            se.execute(null);
+            shouldThrow();
+        } catch (NullPointerException success) {}
+
+        joinPool(se);
+    }
+
+    /**
+     * schedule(null) throws NPE
+     */
+    public void testScheduleNull() throws InterruptedException {
+        ScheduledThreadPoolExecutor se = new ScheduledThreadPoolExecutor(1);
+        try {
+            TrackedCallable callable = null;
+            Future f = se.schedule(callable, SHORT_DELAY_MS, MILLISECONDS);
+            shouldThrow();
+        } catch (NullPointerException success) {}
+        joinPool(se);
+    }
+
+    /**
+     * execute throws RejectedExecutionException if shutdown
+     */
+    public void testSchedule1_RejectedExecutionException() throws InterruptedException {
+        ScheduledThreadPoolExecutor se = new ScheduledThreadPoolExecutor(1);
+        try {
             se.shutdown();
-            se.scheduleAtFixedRate(new Runnable(){
-                    public void run(){}
-                }, 100, 100, TimeUnit.SECONDS);
-            fail("should throw");
-        }catch(RejectedExecutionException e){}    
-    }
-    
-    /**
-     *  Test to verify scheduleAtFixedRate(Runnable, long, long, TimeUnit) throws 
-     *  RejectedExecutionException.
-     *  This occurs on an attempt to schedule a task on a shutdown executor
-     */
-    public void testScheduleAtFixedRate2_RejectedExecutionException(){
-        try{
-            ScheduledExecutor se = new ScheduledExecutor(1);
+            se.schedule(new NoOpRunnable(),
+                        MEDIUM_DELAY_MS, MILLISECONDS);
+            shouldThrow();
+        } catch (RejectedExecutionException success) {
+        } catch (SecurityException ok) {
+        }
+
+        joinPool(se);
+    }
+
+    /**
+     * schedule throws RejectedExecutionException if shutdown
+     */
+    public void testSchedule2_RejectedExecutionException() throws InterruptedException {
+        ScheduledThreadPoolExecutor se = new ScheduledThreadPoolExecutor(1);
+        try {
             se.shutdown();
-            se.scheduleAtFixedRate(new Runnable(){
-                    public void run(){}
-                },  1, 100, TimeUnit.SECONDS);
-            fail("should throw");
-        }catch(RejectedExecutionException e){}    
+            se.schedule(new NoOpCallable(),
+                        MEDIUM_DELAY_MS, MILLISECONDS);
+            shouldThrow();
+        } catch (RejectedExecutionException success) {
+        } catch (SecurityException ok) {
+        }
+        joinPool(se);
     }
 
     /**
-     *  Test to verify scheduleWithFixedDelay(Runnable, long, long, TimeUnit) throws 
-     *  RejectedExecutionException.
-     *  This occurs on an attempt to schedule a task on a shutdown executor
+     * schedule callable throws RejectedExecutionException if shutdown
      */
-    public void testScheduleWithFixedDelay1_RejectedExecutionException(){
-        try{
-            ScheduledExecutor se = new ScheduledExecutor(1);
+    public void testSchedule3_RejectedExecutionException() throws InterruptedException {
+        ScheduledThreadPoolExecutor se = new ScheduledThreadPoolExecutor(1);
+        try {
             se.shutdown();
-            se.scheduleWithFixedDelay(new Runnable(){
-                    public void run(){}
-                }, 100, 100, TimeUnit.SECONDS);
-            fail("should throw");
-        }catch(RejectedExecutionException e){}    
+            se.schedule(new NoOpCallable(),
+                        MEDIUM_DELAY_MS, MILLISECONDS);
+            shouldThrow();
+        } catch (RejectedExecutionException success) {
+        } catch (SecurityException ok) {
+        }
+        joinPool(se);
     }
 
     /**
-     *  Test to verify scheduleWithFixedDelay(Runnable, long, long, TimeUnit) throws 
-     *  RejectedExecutionException.
-     *  This occurs on an attempt to schedule a task on a shutdown executor
+     * scheduleAtFixedRate throws RejectedExecutionException if shutdown
      */
-     public void testScheduleWithFixedDelay2_RejectedExecutionException(){
-        try{
-            ScheduledExecutor se = new ScheduledExecutor(1);
+    public void testScheduleAtFixedRate1_RejectedExecutionException() throws InterruptedException {
+        ScheduledThreadPoolExecutor se = new ScheduledThreadPoolExecutor(1);
+        try {
             se.shutdown();
-            se.scheduleWithFixedDelay(new Runnable(){
-                    public void run(){}
-                },  1, 100, TimeUnit.SECONDS);
-            fail("should throw");
-        }catch(RejectedExecutionException e){}    
+            se.scheduleAtFixedRate(new NoOpRunnable(),
+                                   MEDIUM_DELAY_MS, MEDIUM_DELAY_MS, MILLISECONDS);
+            shouldThrow();
+        } catch (RejectedExecutionException success) {
+        } catch (SecurityException ok) {
+        }
+        joinPool(se);
     }
 
     /**
-     *  Test to verify execute throws RejectedExecutionException
-     *  This occurs on an attempt to schedule a task on a shutdown executor
+     * scheduleWithFixedDelay throws RejectedExecutionException if shutdown
      */
-    public void testExecute_RejectedExecutionException(){
-        try{
-            ScheduledExecutor se = new ScheduledExecutor(1);
+    public void testScheduleWithFixedDelay1_RejectedExecutionException() throws InterruptedException {
+        ScheduledThreadPoolExecutor se = new ScheduledThreadPoolExecutor(1);
+        try {
             se.shutdown();
-            se.execute(new Runnable(){
-                    public void run(){}
-                });
-            fail("should throw");
-        }catch(RejectedExecutionException e){}    
+            se.scheduleWithFixedDelay(new NoOpRunnable(),
+                                      MEDIUM_DELAY_MS, MEDIUM_DELAY_MS, MILLISECONDS);
+            shouldThrow();
+        } catch (RejectedExecutionException success) {
+        } catch (SecurityException ok) {
+        }
+        joinPool(se);
+    }
+
+    /**
+     * getActiveCount increases but doesn't overestimate, when a
+     * thread becomes active
+     */
+    public void testGetActiveCount() throws InterruptedException {
+        final ScheduledThreadPoolExecutor p = new ScheduledThreadPoolExecutor(2);
+        final CountDownLatch threadStarted = new CountDownLatch(1);
+        final CountDownLatch done = new CountDownLatch(1);
+        try {
+            assertEquals(0, p.getActiveCount());
+            p.execute(new CheckedRunnable() {
+                public void realRun() throws InterruptedException {
+                    threadStarted.countDown();
+                    assertEquals(1, p.getActiveCount());
+                    done.await();
+                }});
+            assertTrue(threadStarted.await(SMALL_DELAY_MS, MILLISECONDS));
+            assertEquals(1, p.getActiveCount());
+        } finally {
+            done.countDown();
+            joinPool(p);
+        }
+    }
+
+    /**
+     * getCompletedTaskCount increases, but doesn't overestimate,
+     * when tasks complete
+     */
+    public void testGetCompletedTaskCount() throws InterruptedException {
+        final ThreadPoolExecutor p = new ScheduledThreadPoolExecutor(2);
+        final CountDownLatch threadStarted = new CountDownLatch(1);
+        final CountDownLatch threadProceed = new CountDownLatch(1);
+        final CountDownLatch threadDone = new CountDownLatch(1);
+        try {
+            assertEquals(0, p.getCompletedTaskCount());
+            p.execute(new CheckedRunnable() {
+                public void realRun() throws InterruptedException {
+                    threadStarted.countDown();
+                    assertEquals(0, p.getCompletedTaskCount());
+                    threadProceed.await();
+                    threadDone.countDown();
+                }});
+            assertTrue(threadStarted.await(SMALL_DELAY_MS, MILLISECONDS));
+            assertEquals(0, p.getCompletedTaskCount());
+            threadProceed.countDown();
+            threadDone.await();
+            delay(SHORT_DELAY_MS);
+            assertEquals(1, p.getCompletedTaskCount());
+        } finally {
+            joinPool(p);
+        }
+    }
+
+    /**
+     * getCorePoolSize returns size given in constructor if not otherwise set
+     */
+    public void testGetCorePoolSize() throws InterruptedException {
+        ThreadPoolExecutor p = new ScheduledThreadPoolExecutor(1);
+        assertEquals(1, p.getCorePoolSize());
+        joinPool(p);
+    }
+
+    /**
+     * getLargestPoolSize increases, but doesn't overestimate, when
+     * multiple threads active
+     */
+    public void testGetLargestPoolSize() throws InterruptedException {
+        final int THREADS = 3;
+        final ThreadPoolExecutor p = new ScheduledThreadPoolExecutor(THREADS);
+        final CountDownLatch threadsStarted = new CountDownLatch(THREADS);
+        final CountDownLatch done = new CountDownLatch(1);
+        try {
+            assertEquals(0, p.getLargestPoolSize());
+            for (int i = 0; i < THREADS; i++)
+                p.execute(new CheckedRunnable() {
+                    public void realRun() throws InterruptedException {
+                        threadsStarted.countDown();
+                        done.await();
+                        assertEquals(THREADS, p.getLargestPoolSize());
+                    }});
+            assertTrue(threadsStarted.await(SMALL_DELAY_MS, MILLISECONDS));
+            assertEquals(THREADS, p.getLargestPoolSize());
+        } finally {
+            done.countDown();
+            joinPool(p);
+            assertEquals(THREADS, p.getLargestPoolSize());
+        }
     }
 
+    /**
+     * getPoolSize increases, but doesn't overestimate, when threads
+     * become active
+     */
+    public void testGetPoolSize() throws InterruptedException {
+        final ThreadPoolExecutor p = new ScheduledThreadPoolExecutor(1);
+        final CountDownLatch threadStarted = new CountDownLatch(1);
+        final CountDownLatch done = new CountDownLatch(1);
+        try {
+            assertEquals(0, p.getPoolSize());
+            p.execute(new CheckedRunnable() {
+                public void realRun() throws InterruptedException {
+                    threadStarted.countDown();
+                    assertEquals(1, p.getPoolSize());
+                    done.await();
+                }});
+            assertTrue(threadStarted.await(SMALL_DELAY_MS, MILLISECONDS));
+            assertEquals(1, p.getPoolSize());
+        } finally {
+            done.countDown();
+            joinPool(p);
+        }
+    }
+
+    /**
+     * getTaskCount increases, but doesn't overestimate, when tasks
+     * submitted
+     */
+    public void testGetTaskCount() throws InterruptedException {
+        final ThreadPoolExecutor p = new ScheduledThreadPoolExecutor(1);
+        final CountDownLatch threadStarted = new CountDownLatch(1);
+        final CountDownLatch done = new CountDownLatch(1);
+        final int TASKS = 5;
+        try {
+            assertEquals(0, p.getTaskCount());
+            for (int i = 0; i < TASKS; i++)
+                p.execute(new CheckedRunnable() {
+                    public void realRun() throws InterruptedException {
+                        threadStarted.countDown();
+                        done.await();
+                    }});
+            assertTrue(threadStarted.await(SMALL_DELAY_MS, MILLISECONDS));
+            assertEquals(TASKS, p.getTaskCount());
+        } finally {
+            done.countDown();
+            joinPool(p);
+        }
+    }
+
+    /**
+     * getThreadFactory returns factory in constructor if not set
+     */
+    public void testGetThreadFactory() throws InterruptedException {
+        ThreadFactory tf = new SimpleThreadFactory();
+        ScheduledThreadPoolExecutor p = new ScheduledThreadPoolExecutor(1, tf);
+        assertSame(tf, p.getThreadFactory());
+        joinPool(p);
+    }
+
+    /**
+     * setThreadFactory sets the thread factory returned by getThreadFactory
+     */
+    public void testSetThreadFactory() throws InterruptedException {
+        ThreadFactory tf = new SimpleThreadFactory();
+        ScheduledThreadPoolExecutor p = new ScheduledThreadPoolExecutor(1);
+        p.setThreadFactory(tf);
+        assertSame(tf, p.getThreadFactory());
+        joinPool(p);
+    }
+
+    /**
+     * setThreadFactory(null) throws NPE
+     */
+    public void testSetThreadFactoryNull() throws InterruptedException {
+        ScheduledThreadPoolExecutor p = new ScheduledThreadPoolExecutor(1);
+        try {
+            p.setThreadFactory(null);
+            shouldThrow();
+        } catch (NullPointerException success) {
+        } finally {
+            joinPool(p);
+        }
+    }
+
+    /**
+     * isShutDown is false before shutdown, true after
+     */
+    public void testIsShutdown() {
+
+        ScheduledThreadPoolExecutor p = new ScheduledThreadPoolExecutor(1);
+        try {
+            assertFalse(p.isShutdown());
+        }
+        finally {
+            try { p.shutdown(); } catch (SecurityException ok) { return; }
+        }
+        assertTrue(p.isShutdown());
+    }
+
+
+    /**
+     * isTerminated is false before termination, true after
+     */
+    public void testIsTerminated() throws InterruptedException {
+        final ThreadPoolExecutor p = new ScheduledThreadPoolExecutor(1);
+        final CountDownLatch threadStarted = new CountDownLatch(1);
+        final CountDownLatch done = new CountDownLatch(1);
+        assertFalse(p.isTerminated());
+        try {
+            p.execute(new CheckedRunnable() {
+                public void realRun() throws InterruptedException {
+                    assertFalse(p.isTerminated());
+                    threadStarted.countDown();
+                    done.await();
+                }});
+            assertTrue(threadStarted.await(SMALL_DELAY_MS, MILLISECONDS));
+            assertFalse(p.isTerminating());
+            done.countDown();
+        } finally {
+            try { p.shutdown(); } catch (SecurityException ok) { return; }
+        }
+        assertTrue(p.awaitTermination(LONG_DELAY_MS, MILLISECONDS));
+        assertTrue(p.isTerminated());
+    }
+
+    /**
+     * isTerminating is not true when running or when terminated
+     */
+    public void testIsTerminating() throws InterruptedException {
+        final ThreadPoolExecutor p = new ScheduledThreadPoolExecutor(1);
+        final CountDownLatch threadStarted = new CountDownLatch(1);
+        final CountDownLatch done = new CountDownLatch(1);
+        try {
+            assertFalse(p.isTerminating());
+            p.execute(new CheckedRunnable() {
+                public void realRun() throws InterruptedException {
+                    assertFalse(p.isTerminating());
+                    threadStarted.countDown();
+                    done.await();
+                }});
+            assertTrue(threadStarted.await(SMALL_DELAY_MS, MILLISECONDS));
+            assertFalse(p.isTerminating());
+            done.countDown();
+        } finally {
+            try { p.shutdown(); } catch (SecurityException ok) { return; }
+        }
+        assertTrue(p.awaitTermination(LONG_DELAY_MS, MILLISECONDS));
+        assertTrue(p.isTerminated());
+        assertFalse(p.isTerminating());
+    }
+
+    /**
+     * getQueue returns the work queue, which contains queued tasks
+     */
+    public void testGetQueue() throws InterruptedException {
+        ScheduledThreadPoolExecutor p = new ScheduledThreadPoolExecutor(1);
+        final CountDownLatch threadStarted = new CountDownLatch(1);
+        final CountDownLatch done = new CountDownLatch(1);
+        try {
+            ScheduledFuture[] tasks = new ScheduledFuture[5];
+            for (int i = 0; i < tasks.length; i++) {
+                Runnable r = new CheckedRunnable() {
+                    public void realRun() throws InterruptedException {
+                        threadStarted.countDown();
+                        done.await();
+                    }};
+                tasks[i] = p.schedule(r, 1, MILLISECONDS);
+            }
+            assertTrue(threadStarted.await(SMALL_DELAY_MS, MILLISECONDS));
+            BlockingQueue<Runnable> q = p.getQueue();
+            assertTrue(q.contains(tasks[tasks.length - 1]));
+            assertFalse(q.contains(tasks[0]));
+        } finally {
+            done.countDown();
+            joinPool(p);
+        }
+    }
+
+    /**
+     * remove(task) removes queued task, and fails to remove active task
+     */
+    public void testRemove() throws InterruptedException {
+        final ScheduledThreadPoolExecutor p = new ScheduledThreadPoolExecutor(1);
+        ScheduledFuture[] tasks = new ScheduledFuture[5];
+        final CountDownLatch threadStarted = new CountDownLatch(1);
+        final CountDownLatch done = new CountDownLatch(1);
+        try {
+            for (int i = 0; i < tasks.length; i++) {
+                Runnable r = new CheckedRunnable() {
+                    public void realRun() throws InterruptedException {
+                        threadStarted.countDown();
+                        done.await();
+                    }};
+                tasks[i] = p.schedule(r, 1, MILLISECONDS);
+            }
+            assertTrue(threadStarted.await(SMALL_DELAY_MS, MILLISECONDS));
+            BlockingQueue<Runnable> q = p.getQueue();
+            assertFalse(p.remove((Runnable)tasks[0]));
+            assertTrue(q.contains((Runnable)tasks[4]));
+            assertTrue(q.contains((Runnable)tasks[3]));
+            assertTrue(p.remove((Runnable)tasks[4]));
+            assertFalse(p.remove((Runnable)tasks[4]));
+            assertFalse(q.contains((Runnable)tasks[4]));
+            assertTrue(q.contains((Runnable)tasks[3]));
+            assertTrue(p.remove((Runnable)tasks[3]));
+            assertFalse(q.contains((Runnable)tasks[3]));
+        } finally {
+            done.countDown();
+            joinPool(p);
+        }
+    }
+
+    /**
+     * purge removes cancelled tasks from the queue
+     */
+    public void testPurge() throws InterruptedException {
+        ScheduledThreadPoolExecutor p = new ScheduledThreadPoolExecutor(1);
+        ScheduledFuture[] tasks = new ScheduledFuture[5];
+        for (int i = 0; i < tasks.length; i++) {
+            tasks[i] = p.schedule(new SmallPossiblyInterruptedRunnable(), SHORT_DELAY_MS, MILLISECONDS);
+        }
+        try {
+            int max = tasks.length;
+            if (tasks[4].cancel(true)) --max;
+            if (tasks[3].cancel(true)) --max;
+            // There must eventually be an interference-free point at
+            // which purge will not fail. (At worst, when queue is empty.)
+            int k;
+            for (k = 0; k < SMALL_DELAY_MS; ++k) {
+                p.purge();
+                long count = p.getTaskCount();
+                if (count >= 0 && count <= max)
+                    break;
+                delay(1);
+            }
+            assertTrue(k < SMALL_DELAY_MS);
+        } finally {
+            for (ScheduledFuture task : tasks)
+                task.cancel(true);
+            joinPool(p);
+        }
+    }
+
+    /**
+     * shutDownNow returns a list containing tasks that were not run
+     */
+    public void testShutDownNow() throws InterruptedException {
+        ScheduledThreadPoolExecutor p = new ScheduledThreadPoolExecutor(1);
+        for (int i = 0; i < 5; i++)
+            p.schedule(new SmallPossiblyInterruptedRunnable(), SHORT_DELAY_MS, MILLISECONDS);
+        List l;
+        try {
+            l = p.shutdownNow();
+        } catch (SecurityException ok) {
+            return;
+        }
+        assertTrue(p.isShutdown());
+        assertTrue(l.size() > 0 && l.size() <= 5);
+        joinPool(p);
+    }
+
+    /**
+     * In default setting, shutdown cancels periodic but not delayed
+     * tasks at shutdown
+     */
+    public void testShutDown1() throws InterruptedException {
+        ScheduledThreadPoolExecutor p = new ScheduledThreadPoolExecutor(1);
+        assertTrue(p.getExecuteExistingDelayedTasksAfterShutdownPolicy());
+        assertFalse(p.getContinueExistingPeriodicTasksAfterShutdownPolicy());
+
+        ScheduledFuture[] tasks = new ScheduledFuture[5];
+        for (int i = 0; i < tasks.length; i++)
+            tasks[i] = p.schedule(new NoOpRunnable(),
+                                  SHORT_DELAY_MS, MILLISECONDS);
+        try { p.shutdown(); } catch (SecurityException ok) { return; }
+        BlockingQueue<Runnable> q = p.getQueue();
+        for (ScheduledFuture task : tasks) {
+            assertFalse(task.isDone());
+            assertFalse(task.isCancelled());
+            assertTrue(q.contains(task));
+        }
+        assertTrue(p.isShutdown());
+        assertTrue(p.awaitTermination(SMALL_DELAY_MS, MILLISECONDS));
+        assertTrue(p.isTerminated());
+        for (ScheduledFuture task : tasks) {
+            assertTrue(task.isDone());
+            assertFalse(task.isCancelled());
+        }
+    }
+
+
+    /**
+     * If setExecuteExistingDelayedTasksAfterShutdownPolicy is false,
+     * delayed tasks are cancelled at shutdown
+     */
+    public void testShutDown2() throws InterruptedException {
+        ScheduledThreadPoolExecutor p = new ScheduledThreadPoolExecutor(1);
+        p.setExecuteExistingDelayedTasksAfterShutdownPolicy(false);
+        assertFalse(p.getExecuteExistingDelayedTasksAfterShutdownPolicy());
+        assertFalse(p.getContinueExistingPeriodicTasksAfterShutdownPolicy());
+        ScheduledFuture[] tasks = new ScheduledFuture[5];
+        for (int i = 0; i < tasks.length; i++)
+            tasks[i] = p.schedule(new NoOpRunnable(),
+                                  SHORT_DELAY_MS, MILLISECONDS);
+        BlockingQueue q = p.getQueue();
+        assertEquals(tasks.length, q.size());
+        try { p.shutdown(); } catch (SecurityException ok) { return; }
+        assertTrue(p.isShutdown());
+        assertTrue(q.isEmpty());
+        assertTrue(p.awaitTermination(SMALL_DELAY_MS, MILLISECONDS));
+        assertTrue(p.isTerminated());
+        for (ScheduledFuture task : tasks) {
+            assertTrue(task.isDone());
+            assertTrue(task.isCancelled());
+        }
+    }
+
+    /**
+     * If setContinueExistingPeriodicTasksAfterShutdownPolicy is set false,
+     * periodic tasks are cancelled at shutdown
+     */
+    public void testShutDown3() throws InterruptedException {
+        ScheduledThreadPoolExecutor p = new ScheduledThreadPoolExecutor(1);
+        assertTrue(p.getExecuteExistingDelayedTasksAfterShutdownPolicy());
+        assertFalse(p.getContinueExistingPeriodicTasksAfterShutdownPolicy());
+        p.setContinueExistingPeriodicTasksAfterShutdownPolicy(false);
+        assertTrue(p.getExecuteExistingDelayedTasksAfterShutdownPolicy());
+        assertFalse(p.getContinueExistingPeriodicTasksAfterShutdownPolicy());
+        ScheduledFuture task =
+            p.scheduleAtFixedRate(new NoOpRunnable(), 5, 5, MILLISECONDS);
+        try { p.shutdown(); } catch (SecurityException ok) { return; }
+        assertTrue(p.isShutdown());
+        BlockingQueue q = p.getQueue();
+        assertTrue(p.getQueue().isEmpty());
+        assertTrue(task.isDone());
+        assertTrue(task.isCancelled());
+        assertTrue(p.awaitTermination(SMALL_DELAY_MS, MILLISECONDS));
+        assertTrue(p.isTerminated());
+    }
+
+    /**
+     * if setContinueExistingPeriodicTasksAfterShutdownPolicy is true,
+     * periodic tasks are not cancelled at shutdown
+     */
+    public void testShutDown4() throws InterruptedException {
+        ScheduledThreadPoolExecutor p = new ScheduledThreadPoolExecutor(1);
+        final CountDownLatch counter = new CountDownLatch(2);
+        try {
+            p.setContinueExistingPeriodicTasksAfterShutdownPolicy(true);
+            assertTrue(p.getExecuteExistingDelayedTasksAfterShutdownPolicy());
+            assertTrue(p.getContinueExistingPeriodicTasksAfterShutdownPolicy());
+            final Runnable r = new CheckedRunnable() {
+                public void realRun() {
+                    counter.countDown();
+                }};
+            ScheduledFuture task =
+                p.scheduleAtFixedRate(r, 1, 1, MILLISECONDS);
+            assertFalse(task.isDone());
+            assertFalse(task.isCancelled());
+            try { p.shutdown(); } catch (SecurityException ok) { return; }
+            assertFalse(task.isCancelled());
+            assertFalse(p.isTerminated());
+            assertTrue(p.isShutdown());
+            assertTrue(counter.await(SMALL_DELAY_MS, MILLISECONDS));
+            assertFalse(task.isCancelled());
+            assertTrue(task.cancel(false));
+            assertTrue(task.isDone());
+            assertTrue(task.isCancelled());
+            assertTrue(p.awaitTermination(SMALL_DELAY_MS, MILLISECONDS));
+            assertTrue(p.isTerminated());
+        }
+        finally {
+            joinPool(p);
+        }
+    }
+
+    /**
+     * completed submit of callable returns result
+     */
+    public void testSubmitCallable() throws Exception {
+        ExecutorService e = new ScheduledThreadPoolExecutor(2);
+        try {
+            Future<String> future = e.submit(new StringTask());
+            String result = future.get();
+            assertSame(TEST_STRING, result);
+        } finally {
+            joinPool(e);
+        }
+    }
+
+    /**
+     * completed submit of runnable returns successfully
+     */
+    public void testSubmitRunnable() throws Exception {
+        ExecutorService e = new ScheduledThreadPoolExecutor(2);
+        try {
+            Future<?> future = e.submit(new NoOpRunnable());
+            future.get();
+            assertTrue(future.isDone());
+        } finally {
+            joinPool(e);
+        }
+    }
+
+    /**
+     * completed submit of (runnable, result) returns result
+     */
+    public void testSubmitRunnable2() throws Exception {
+        ExecutorService e = new ScheduledThreadPoolExecutor(2);
+        try {
+            Future<String> future = e.submit(new NoOpRunnable(), TEST_STRING);
+            String result = future.get();
+            assertSame(TEST_STRING, result);
+        } finally {
+            joinPool(e);
+        }
+    }
+
+    /**
+     * invokeAny(null) throws NPE
+     */
+    public void testInvokeAny1() throws Exception {
+        ExecutorService e = new ScheduledThreadPoolExecutor(2);
+        try {
+            e.invokeAny(null);
+            shouldThrow();
+        } catch (NullPointerException success) {
+        } finally {
+            joinPool(e);
+        }
+    }
+
+    /**
+     * invokeAny(empty collection) throws IAE
+     */
+    public void testInvokeAny2() throws Exception {
+        ExecutorService e = new ScheduledThreadPoolExecutor(2);
+        try {
+            e.invokeAny(new ArrayList<Callable<String>>());
+            shouldThrow();
+        } catch (IllegalArgumentException success) {
+        } finally {
+            joinPool(e);
+        }
+    }
+
+    /**
+     * invokeAny(c) throws NPE if c has null elements
+     */
+    public void testInvokeAny3() throws Exception {
+        CountDownLatch latch = new CountDownLatch(1);
+        ExecutorService e = new ScheduledThreadPoolExecutor(2);
+        List<Callable<String>> l = new ArrayList<Callable<String>>();
+        l.add(latchAwaitingStringTask(latch));
+        l.add(null);
+        try {
+            e.invokeAny(l);
+            shouldThrow();
+        } catch (NullPointerException success) {
+        } finally {
+            latch.countDown();
+            joinPool(e);
+        }
+    }
+
+    /**
+     * invokeAny(c) throws ExecutionException if no task completes
+     */
+    public void testInvokeAny4() throws Exception {
+        ExecutorService e = new ScheduledThreadPoolExecutor(2);
+        List<Callable<String>> l = new ArrayList<Callable<String>>();
+        l.add(new NPETask());
+        try {
+            e.invokeAny(l);
+            shouldThrow();
+        } catch (ExecutionException success) {
+            assertTrue(success.getCause() instanceof NullPointerException);
+        } finally {
+            joinPool(e);
+        }
+    }
+
+    /**
+     * invokeAny(c) returns result of some task
+     */
+    public void testInvokeAny5() throws Exception {
+        ExecutorService e = new ScheduledThreadPoolExecutor(2);
+        try {
+            List<Callable<String>> l = new ArrayList<Callable<String>>();
+            l.add(new StringTask());
+            l.add(new StringTask());
+            String result = e.invokeAny(l);
+            assertSame(TEST_STRING, result);
+        } finally {
+            joinPool(e);
+        }
+    }
+
+    /**
+     * invokeAll(null) throws NPE
+     */
+    public void testInvokeAll1() throws Exception {
+        ExecutorService e = new ScheduledThreadPoolExecutor(2);
+        try {
+            e.invokeAll(null);
+            shouldThrow();
+        } catch (NullPointerException success) {
+        } finally {
+            joinPool(e);
+        }
+    }
+
+    /**
+     * invokeAll(empty collection) returns empty collection
+     */
+    public void testInvokeAll2() throws Exception {
+        ExecutorService e = new ScheduledThreadPoolExecutor(2);
+        try {
+            List<Future<String>> r = e.invokeAll(new ArrayList<Callable<String>>());
+            assertTrue(r.isEmpty());
+        } finally {
+            joinPool(e);
+        }
+    }
+
+    /**
+     * invokeAll(c) throws NPE if c has null elements
+     */
+    public void testInvokeAll3() throws Exception {
+        ExecutorService e = new ScheduledThreadPoolExecutor(2);
+        List<Callable<String>> l = new ArrayList<Callable<String>>();
+        l.add(new StringTask());
+        l.add(null);
+        try {
+            e.invokeAll(l);
+            shouldThrow();
+        } catch (NullPointerException success) {
+        } finally {
+            joinPool(e);
+        }
+    }
+
+    /**
+     * get of invokeAll(c) throws exception on failed task
+     */
+    public void testInvokeAll4() throws Exception {
+        ExecutorService e = new ScheduledThreadPoolExecutor(2);
+        List<Callable<String>> l = new ArrayList<Callable<String>>();
+        l.add(new NPETask());
+        List<Future<String>> futures = e.invokeAll(l);
+        assertEquals(1, futures.size());
+        try {
+            futures.get(0).get();
+            shouldThrow();
+        } catch (ExecutionException success) {
+            assertTrue(success.getCause() instanceof NullPointerException);
+        } finally {
+            joinPool(e);
+        }
+    }
+
+    /**
+     * invokeAll(c) returns results of all completed tasks
+     */
+    public void testInvokeAll5() throws Exception {
+        ExecutorService e = new ScheduledThreadPoolExecutor(2);
+        try {
+            List<Callable<String>> l = new ArrayList<Callable<String>>();
+            l.add(new StringTask());
+            l.add(new StringTask());
+            List<Future<String>> futures = e.invokeAll(l);
+            assertEquals(2, futures.size());
+            for (Future<String> future : futures)
+                assertSame(TEST_STRING, future.get());
+        } finally {
+            joinPool(e);
+        }
+    }
+
+    /**
+     * timed invokeAny(null) throws NPE
+     */
+    public void testTimedInvokeAny1() throws Exception {
+        ExecutorService e = new ScheduledThreadPoolExecutor(2);
+        try {
+            e.invokeAny(null, MEDIUM_DELAY_MS, MILLISECONDS);
+            shouldThrow();
+        } catch (NullPointerException success) {
+        } finally {
+            joinPool(e);
+        }
+    }
+
+    /**
+     * timed invokeAny(,,null) throws NPE
+     */
+    public void testTimedInvokeAnyNullTimeUnit() throws Exception {
+        ExecutorService e = new ScheduledThreadPoolExecutor(2);
+        List<Callable<String>> l = new ArrayList<Callable<String>>();
+        l.add(new StringTask());
+        try {
+            e.invokeAny(l, MEDIUM_DELAY_MS, null);
+            shouldThrow();
+        } catch (NullPointerException success) {
+        } finally {
+            joinPool(e);
+        }
+    }
+
+    /**
+     * timed invokeAny(empty collection) throws IAE
+     */
+    public void testTimedInvokeAny2() throws Exception {
+        ExecutorService e = new ScheduledThreadPoolExecutor(2);
+        try {
+            e.invokeAny(new ArrayList<Callable<String>>(), MEDIUM_DELAY_MS, MILLISECONDS);
+            shouldThrow();
+        } catch (IllegalArgumentException success) {
+        } finally {
+            joinPool(e);
+        }
+    }
+
+    /**
+     * timed invokeAny(c) throws NPE if c has null elements
+     */
+    public void testTimedInvokeAny3() throws Exception {
+        CountDownLatch latch = new CountDownLatch(1);
+        ExecutorService e = new ScheduledThreadPoolExecutor(2);
+        List<Callable<String>> l = new ArrayList<Callable<String>>();
+        l.add(latchAwaitingStringTask(latch));
+        l.add(null);
+        try {
+            e.invokeAny(l, MEDIUM_DELAY_MS, MILLISECONDS);
+            shouldThrow();
+        } catch (NullPointerException success) {
+        } finally {
+            latch.countDown();
+            joinPool(e);
+        }
+    }
+
+    /**
+     * timed invokeAny(c) throws ExecutionException if no task completes
+     */
+    public void testTimedInvokeAny4() throws Exception {
+        ExecutorService e = new ScheduledThreadPoolExecutor(2);
+        List<Callable<String>> l = new ArrayList<Callable<String>>();
+        l.add(new NPETask());
+        try {
+            e.invokeAny(l, MEDIUM_DELAY_MS, MILLISECONDS);
+            shouldThrow();
+        } catch (ExecutionException success) {
+            assertTrue(success.getCause() instanceof NullPointerException);
+        } finally {
+            joinPool(e);
+        }
+    }
+
+    /**
+     * timed invokeAny(c) returns result of some task
+     */
+    public void testTimedInvokeAny5() throws Exception {
+        ExecutorService e = new ScheduledThreadPoolExecutor(2);
+        try {
+            List<Callable<String>> l = new ArrayList<Callable<String>>();
+            l.add(new StringTask());
+            l.add(new StringTask());
+            String result = e.invokeAny(l, MEDIUM_DELAY_MS, MILLISECONDS);
+            assertSame(TEST_STRING, result);
+        } finally {
+            joinPool(e);
+        }
+    }
+
+    /**
+     * timed invokeAll(null) throws NPE
+     */
+    public void testTimedInvokeAll1() throws Exception {
+        ExecutorService e = new ScheduledThreadPoolExecutor(2);
+        try {
+            e.invokeAll(null, MEDIUM_DELAY_MS, MILLISECONDS);
+            shouldThrow();
+        } catch (NullPointerException success) {
+        } finally {
+            joinPool(e);
+        }
+    }
+
+    /**
+     * timed invokeAll(,,null) throws NPE
+     */
+    public void testTimedInvokeAllNullTimeUnit() throws Exception {
+        ExecutorService e = new ScheduledThreadPoolExecutor(2);
+        List<Callable<String>> l = new ArrayList<Callable<String>>();
+        l.add(new StringTask());
+        try {
+            e.invokeAll(l, MEDIUM_DELAY_MS, null);
+            shouldThrow();
+        } catch (NullPointerException success) {
+        } finally {
+            joinPool(e);
+        }
+    }
+
+    /**
+     * timed invokeAll(empty collection) returns empty collection
+     */
+    public void testTimedInvokeAll2() throws Exception {
+        ExecutorService e = new ScheduledThreadPoolExecutor(2);
+        try {
+            List<Future<String>> r = e.invokeAll(new ArrayList<Callable<String>>(), MEDIUM_DELAY_MS, MILLISECONDS);
+            assertTrue(r.isEmpty());
+        } finally {
+            joinPool(e);
+        }
+    }
+
+    /**
+     * timed invokeAll(c) throws NPE if c has null elements
+     */
+    public void testTimedInvokeAll3() throws Exception {
+        ExecutorService e = new ScheduledThreadPoolExecutor(2);
+        List<Callable<String>> l = new ArrayList<Callable<String>>();
+        l.add(new StringTask());
+        l.add(null);
+        try {
+            e.invokeAll(l, MEDIUM_DELAY_MS, MILLISECONDS);
+            shouldThrow();
+        } catch (NullPointerException success) {
+        } finally {
+            joinPool(e);
+        }
+    }
+
+    /**
+     * get of element of invokeAll(c) throws exception on failed task
+     */
+    public void testTimedInvokeAll4() throws Exception {
+        ExecutorService e = new ScheduledThreadPoolExecutor(2);
+        List<Callable<String>> l = new ArrayList<Callable<String>>();
+        l.add(new NPETask());
+        List<Future<String>> futures =
+            e.invokeAll(l, MEDIUM_DELAY_MS, MILLISECONDS);
+        assertEquals(1, futures.size());
+        try {
+            futures.get(0).get();
+            shouldThrow();
+        } catch (ExecutionException success) {
+            assertTrue(success.getCause() instanceof NullPointerException);
+        } finally {
+            joinPool(e);
+        }
+    }
+
+    /**
+     * timed invokeAll(c) returns results of all completed tasks
+     */
+    public void testTimedInvokeAll5() throws Exception {
+        ExecutorService e = new ScheduledThreadPoolExecutor(2);
+        try {
+            List<Callable<String>> l = new ArrayList<Callable<String>>();
+            l.add(new StringTask());
+            l.add(new StringTask());
+            List<Future<String>> futures =
+                e.invokeAll(l, MEDIUM_DELAY_MS, MILLISECONDS);
+            assertEquals(2, futures.size());
+            for (Future<String> future : futures)
+                assertSame(TEST_STRING, future.get());
+        } finally {
+            joinPool(e);
+        }
+    }
+
+    /**
+     * timed invokeAll(c) cancels tasks not completed by timeout
+     */
+    public void testTimedInvokeAll6() throws Exception {
+        ExecutorService e = new ScheduledThreadPoolExecutor(2);
+        try {
+            List<Callable<String>> l = new ArrayList<Callable<String>>();
+            l.add(new StringTask());
+            l.add(Executors.callable(new MediumPossiblyInterruptedRunnable(), TEST_STRING));
+            l.add(new StringTask());
+            List<Future<String>> futures =
+                e.invokeAll(l, SHORT_DELAY_MS, MILLISECONDS);
+            assertEquals(3, futures.size());
+            Iterator<Future<String>> it = futures.iterator();
+            Future<String> f1 = it.next();
+            Future<String> f2 = it.next();
+            Future<String> f3 = it.next();
+            assertTrue(f1.isDone());
+            assertTrue(f2.isDone());
+            assertTrue(f3.isDone());
+            assertFalse(f1.isCancelled());
+            assertTrue(f2.isCancelled());
+        } finally {
+            joinPool(e);
+        }
+    }
+
+
 }