--- jsr166/src/test/tck/ScheduledExecutorTest.java	2003/09/25 11:02:41	1.6
+++ jsr166/src/test/tck/ScheduledExecutorTest.java	2009/12/01 22:51:44	1.29
@@ -1,209 +1,197 @@
 /*
- * 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/licenses/publicdomain
+ * 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 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);
     }
 
-    static class MyRunnable implements Runnable {
-        volatile boolean done = false;
-        public void run() {
-            try {
-                Thread.sleep(SMALL_DELAY_MS);
-                done = true;
-            } catch(Exception e){
-            }
-        }
-    }
-
-    static class MyCallable implements Callable {
-        volatile boolean done = false;
-        public Object call() {
-            try {
-                Thread.sleep(SMALL_DELAY_MS);
-                done = true;
-            } catch(Exception e){
-            }
-            return Boolean.TRUE;
-        }
-    }
 
     /**
      * execute successfully executes a runnable
      */
-    public void testExecute() {
-	try {
-            MyRunnable runnable =new MyRunnable();
-            ScheduledExecutor p1 = new ScheduledExecutor(1);
-	    p1.execute(runnable);
-	    assertFalse(runnable.done);
-	    Thread.sleep(SHORT_DELAY_MS);
-	    p1.shutdown();
-	    try {
-                Thread.sleep(MEDIUM_DELAY_MS);
-            } catch(InterruptedException e){
-                unexpectedException();
-            }
-	    assertTrue(runnable.done);
-            p1.shutdown();
-            joinPool(p1);
-        }
-	catch(Exception e){
-            unexpectedException();
-        }
-        
+    public void testExecute() throws InterruptedException {
+        TrackedShortRunnable runnable =new TrackedShortRunnable();
+        ScheduledThreadPoolExecutor p1 = new ScheduledThreadPoolExecutor(1);
+        p1.execute(runnable);
+        assertFalse(runnable.done);
+        Thread.sleep(SHORT_DELAY_MS);
+        try { p1.shutdown(); } catch (SecurityException ok) { return; }
+        Thread.sleep(MEDIUM_DELAY_MS);
+        assertTrue(runnable.done);
+        try { p1.shutdown(); } catch (SecurityException ok) { return; }
+        joinPool(p1);
     }
 
 
     /**
      * delayed schedule of callable successfully executes after delay
      */
-    public void testSchedule1() {
-	try {
-            MyCallable callable = new MyCallable();
-            ScheduledExecutor p1 = new ScheduledExecutor(1);
-	    Future f = p1.schedule(callable, SHORT_DELAY_MS, TimeUnit.MILLISECONDS);
-	    assertFalse(callable.done);
-	    Thread.sleep(MEDIUM_DELAY_MS);
-	    assertTrue(callable.done);
-	    assertEquals(Boolean.TRUE, f.get());
-            p1.shutdown();
-            joinPool(p1);
-	} catch(RejectedExecutionException e){}
-	catch(Exception e){
-            unexpectedException();
-        }
+    public void testSchedule1() throws Exception {
+        TrackedCallable callable = new TrackedCallable();
+        ScheduledThreadPoolExecutor p1 = new ScheduledThreadPoolExecutor(1);
+        Future f = p1.schedule(callable, SHORT_DELAY_MS, MILLISECONDS);
+        assertFalse(callable.done);
+        Thread.sleep(MEDIUM_DELAY_MS);
+        assertTrue(callable.done);
+        assertEquals(Boolean.TRUE, f.get());
+        try { p1.shutdown(); } catch (SecurityException ok) { return; }
+        joinPool(p1);
     }
 
     /**
      *  delayed schedule of runnable successfully executes after delay
      */
-    public void testSchedule3() {
-	try {
-            MyRunnable runnable = new MyRunnable();
-            ScheduledExecutor p1 = new ScheduledExecutor(1);
-	    p1.schedule(runnable, SMALL_DELAY_MS, TimeUnit.MILLISECONDS);
-	    Thread.sleep(SHORT_DELAY_MS);
-	    assertFalse(runnable.done);
-	    Thread.sleep(MEDIUM_DELAY_MS);
-	    assertTrue(runnable.done);
-            p1.shutdown();
-            joinPool(p1);
-        } catch(Exception e){
-            unexpectedException();
-        }
+    public void testSchedule3() throws InterruptedException {
+        TrackedShortRunnable runnable = new TrackedShortRunnable();
+        ScheduledThreadPoolExecutor p1 = new ScheduledThreadPoolExecutor(1);
+        p1.schedule(runnable, SMALL_DELAY_MS, MILLISECONDS);
+        Thread.sleep(SHORT_DELAY_MS);
+        assertFalse(runnable.done);
+        Thread.sleep(MEDIUM_DELAY_MS);
+        assertTrue(runnable.done);
+        try { p1.shutdown(); } catch (SecurityException ok) { return; }
+        joinPool(p1);
     }
-    
+
     /**
      * scheduleAtFixedRate executes runnable after given initial delay
      */
-    public void testSchedule4() {
-	try {
-            MyRunnable runnable = new MyRunnable();
-            ScheduledExecutor p1 = new ScheduledExecutor(1);
-	    ScheduledCancellable h = p1.scheduleAtFixedRate(runnable, SHORT_DELAY_MS, SHORT_DELAY_MS, TimeUnit.MILLISECONDS);
-	    assertFalse(runnable.done);
-	    Thread.sleep(MEDIUM_DELAY_MS);
-	    assertTrue(runnable.done);
-            h.cancel(true);
-            p1.shutdown();
-            joinPool(p1);
-        } catch(Exception e){
-            unexpectedException();
-        }
+    public void testSchedule4() throws InterruptedException {
+        TrackedShortRunnable runnable = new TrackedShortRunnable();
+        ScheduledThreadPoolExecutor p1 = new ScheduledThreadPoolExecutor(1);
+        ScheduledFuture h = p1.scheduleAtFixedRate(runnable, SHORT_DELAY_MS, SHORT_DELAY_MS, MILLISECONDS);
+        assertFalse(runnable.done);
+        Thread.sleep(MEDIUM_DELAY_MS);
+        assertTrue(runnable.done);
+        h.cancel(true);
+        joinPool(p1);
+    }
+
+    static class RunnableCounter implements Runnable {
+        AtomicInteger count = new AtomicInteger(0);
+        public void run() { count.getAndIncrement(); }
     }
 
     /**
      * scheduleWithFixedDelay executes runnable after given initial delay
      */
-    public void testSchedule5() {
-	try {
-            MyRunnable runnable = new MyRunnable();
-            ScheduledExecutor p1 = new ScheduledExecutor(1);
-	    ScheduledCancellable h = p1.scheduleWithFixedDelay(runnable, SHORT_DELAY_MS, SHORT_DELAY_MS, TimeUnit.MILLISECONDS);
-	    assertFalse(runnable.done);
-	    Thread.sleep(MEDIUM_DELAY_MS);
-	    assertTrue(runnable.done);
-            h.cancel(true);
-            p1.shutdown();
-            joinPool(p1);
-        } catch(Exception e){
-            unexpectedException();
-        }
+    public void testSchedule5() throws InterruptedException {
+        TrackedShortRunnable runnable = new TrackedShortRunnable();
+        ScheduledThreadPoolExecutor p1 = new ScheduledThreadPoolExecutor(1);
+        ScheduledFuture h = p1.scheduleWithFixedDelay(runnable, SHORT_DELAY_MS, SHORT_DELAY_MS, MILLISECONDS);
+        assertFalse(runnable.done);
+        Thread.sleep(MEDIUM_DELAY_MS);
+        assertTrue(runnable.done);
+        h.cancel(true);
+        joinPool(p1);
     }
-    
+
+    /**
+     * scheduleAtFixedRate executes series of tasks at given rate
+     */
+    public void testFixedRateSequence() throws InterruptedException {
+        ScheduledThreadPoolExecutor p1 = new ScheduledThreadPoolExecutor(1);
+        RunnableCounter counter = new RunnableCounter();
+        ScheduledFuture h =
+            p1.scheduleAtFixedRate(counter, 0, 1, MILLISECONDS);
+        Thread.sleep(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(p1);
+    }
+
+    /**
+     * scheduleWithFixedDelay executes series of tasks with given period
+     */
+    public void testFixedDelaySequence() throws InterruptedException {
+        ScheduledThreadPoolExecutor p1 = new ScheduledThreadPoolExecutor(1);
+        RunnableCounter counter = new RunnableCounter();
+        ScheduledFuture h =
+            p1.scheduleWithFixedDelay(counter, 0, 1, MILLISECONDS);
+        Thread.sleep(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(p1);
+    }
+
+
     /**
      *  execute (null) throws NPE
      */
-    public void testExecuteNull() {
-        ScheduledExecutor se = null;
+    public void testExecuteNull() throws InterruptedException {
+        ScheduledThreadPoolExecutor se = null;
         try {
-	    se = new ScheduledExecutor(1);
-	    se.execute(null);
+            se = new ScheduledThreadPoolExecutor(1);
+            se.execute(null);
             shouldThrow();
-	} catch(NullPointerException success){}
-	catch(Exception e){
-            unexpectedException();
-        }
-	
-	joinPool(se);
+        } catch (NullPointerException success) {}
+
+        joinPool(se);
     }
 
     /**
      * schedule (null) throws NPE
      */
-    public void testScheduleNull() {
-        ScheduledExecutor se = new ScheduledExecutor(1);
-	try {
-            MyCallable callable = null;
-	    Future f = se.schedule(callable, SHORT_DELAY_MS, TimeUnit.MILLISECONDS);
-            shouldThrow();
-	} catch(NullPointerException success){}
-	catch(Exception e){
-            unexpectedException();
-        }
-	joinPool(se);
+    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() {
-        ScheduledExecutor se = new ScheduledExecutor(1);
+    public void testSchedule1_RejectedExecutionException() throws InterruptedException {
+        ScheduledThreadPoolExecutor se = new ScheduledThreadPoolExecutor(1);
         try {
             se.shutdown();
             se.schedule(new NoOpRunnable(),
-                        MEDIUM_DELAY_MS, TimeUnit.MILLISECONDS);
+                        MEDIUM_DELAY_MS, MILLISECONDS);
             shouldThrow();
-        } catch(RejectedExecutionException success){
+        } catch (RejectedExecutionException success) {
+        } catch (SecurityException ok) {
         }
-        joinPool(se);
 
+        joinPool(se);
     }
 
     /**
      * schedule throws RejectedExecutionException if shutdown
      */
-    public void testSchedule2_RejectedExecutionException() {
-        ScheduledExecutor se = new ScheduledExecutor(1);
+    public void testSchedule2_RejectedExecutionException() throws InterruptedException {
+        ScheduledThreadPoolExecutor se = new ScheduledThreadPoolExecutor(1);
         try {
             se.shutdown();
             se.schedule(new NoOpCallable(),
-                        MEDIUM_DELAY_MS, TimeUnit.MILLISECONDS);
+                        MEDIUM_DELAY_MS, MILLISECONDS);
             shouldThrow();
-        } catch(RejectedExecutionException success){
+        } catch (RejectedExecutionException success) {
+        } catch (SecurityException ok) {
         }
         joinPool(se);
     }
@@ -211,45 +199,48 @@ public class ScheduledExecutorTest exten
     /**
      * schedule callable throws RejectedExecutionException if shutdown
      */
-     public void testSchedule3_RejectedExecutionException() {
-         ScheduledExecutor se = new ScheduledExecutor(1);
+     public void testSchedule3_RejectedExecutionException() throws InterruptedException {
+         ScheduledThreadPoolExecutor se = new ScheduledThreadPoolExecutor(1);
          try {
             se.shutdown();
             se.schedule(new NoOpCallable(),
-                        MEDIUM_DELAY_MS, TimeUnit.MILLISECONDS);
+                        MEDIUM_DELAY_MS, MILLISECONDS);
             shouldThrow();
-        } catch(RejectedExecutionException success){
-        } 
+        } catch (RejectedExecutionException success) {
+        } catch (SecurityException ok) {
+        }
          joinPool(se);
     }
 
     /**
      *  scheduleAtFixedRate throws RejectedExecutionException if shutdown
      */
-    public void testScheduleAtFixedRate1_RejectedExecutionException() {
-        ScheduledExecutor se = new ScheduledExecutor(1);
+    public void testScheduleAtFixedRate1_RejectedExecutionException() throws InterruptedException {
+        ScheduledThreadPoolExecutor se = new ScheduledThreadPoolExecutor(1);
         try {
             se.shutdown();
             se.scheduleAtFixedRate(new NoOpRunnable(),
-                                   MEDIUM_DELAY_MS, MEDIUM_DELAY_MS, TimeUnit.MILLISECONDS);
+                                   MEDIUM_DELAY_MS, MEDIUM_DELAY_MS, MILLISECONDS);
             shouldThrow();
-        } catch(RejectedExecutionException success){
-        } 
+        } catch (RejectedExecutionException success) {
+        } catch (SecurityException ok) {
+        }
         joinPool(se);
     }
-    
+
     /**
      * scheduleWithFixedDelay throws RejectedExecutionException if shutdown
      */
-    public void testScheduleWithFixedDelay1_RejectedExecutionException() {
-        ScheduledExecutor se = new ScheduledExecutor(1);
+    public void testScheduleWithFixedDelay1_RejectedExecutionException() throws InterruptedException {
+        ScheduledThreadPoolExecutor se = new ScheduledThreadPoolExecutor(1);
         try {
             se.shutdown();
             se.scheduleWithFixedDelay(new NoOpRunnable(),
-                                      MEDIUM_DELAY_MS, MEDIUM_DELAY_MS, TimeUnit.MILLISECONDS);
+                                      MEDIUM_DELAY_MS, MEDIUM_DELAY_MS, MILLISECONDS);
             shouldThrow();
-        } catch(RejectedExecutionException success){
-        } 
+        } catch (RejectedExecutionException success) {
+        } catch (SecurityException ok) {
+        }
         joinPool(se);
     }
 
@@ -257,176 +248,249 @@ public class ScheduledExecutorTest exten
      *  getActiveCount increases but doesn't overestimate, when a
      *  thread becomes active
      */
-    public void testGetActiveCount() {
-        ScheduledExecutor p2 = new ScheduledExecutor(2);
+    public void testGetActiveCount() throws InterruptedException {
+        ScheduledThreadPoolExecutor p2 = new ScheduledThreadPoolExecutor(2);
         assertEquals(0, p2.getActiveCount());
         p2.execute(new SmallRunnable());
-        try {
-            Thread.sleep(SHORT_DELAY_MS);
-        } catch(Exception e){
-            unexpectedException();
-        }
+        Thread.sleep(SHORT_DELAY_MS);
         assertEquals(1, p2.getActiveCount());
         joinPool(p2);
     }
-    
+
     /**
      *    getCompletedTaskCount increases, but doesn't overestimate,
      *   when tasks complete
      */
-    public void testGetCompletedTaskCount() {
-        ScheduledExecutor p2 = new ScheduledExecutor(2);
+    public void testGetCompletedTaskCount() throws InterruptedException {
+        ScheduledThreadPoolExecutor p2 = new ScheduledThreadPoolExecutor(2);
         assertEquals(0, p2.getCompletedTaskCount());
         p2.execute(new SmallRunnable());
-        try {
-            Thread.sleep(MEDIUM_DELAY_MS);
-        } catch(Exception e){
-            unexpectedException();
-        }
+        Thread.sleep(MEDIUM_DELAY_MS);
         assertEquals(1, p2.getCompletedTaskCount());
         joinPool(p2);
     }
-    
+
     /**
-     *  getCorePoolSize returns size given in constructor if not otherwise set 
+     *  getCorePoolSize returns size given in constructor if not otherwise set
      */
-    public void testGetCorePoolSize() {
-        ScheduledExecutor p1 = new ScheduledExecutor(1);
+    public void testGetCorePoolSize() throws InterruptedException {
+        ScheduledThreadPoolExecutor p1 = new ScheduledThreadPoolExecutor(1);
         assertEquals(1, p1.getCorePoolSize());
         joinPool(p1);
     }
-    
+
     /**
      *    getLargestPoolSize increases, but doesn't overestimate, when
      *   multiple threads active
      */
-    public void testGetLargestPoolSize() {
-        ScheduledExecutor p2 = new ScheduledExecutor(2);
+    public void testGetLargestPoolSize() throws InterruptedException {
+        ScheduledThreadPoolExecutor p2 = new ScheduledThreadPoolExecutor(2);
         assertEquals(0, p2.getLargestPoolSize());
         p2.execute(new SmallRunnable());
         p2.execute(new SmallRunnable());
-        try {
-            Thread.sleep(SHORT_DELAY_MS);
-        } catch(Exception e){
-            unexpectedException();
-        }
+        Thread.sleep(SHORT_DELAY_MS);
         assertEquals(2, p2.getLargestPoolSize());
         joinPool(p2);
     }
-    
+
     /**
      *   getPoolSize increases, but doesn't overestimate, when threads
      *   become active
      */
-    public void testGetPoolSize() {
-        ScheduledExecutor p1 = new ScheduledExecutor(1);
+    public void testGetPoolSize() throws InterruptedException {
+        ScheduledThreadPoolExecutor p1 = new ScheduledThreadPoolExecutor(1);
         assertEquals(0, p1.getPoolSize());
         p1.execute(new SmallRunnable());
         assertEquals(1, p1.getPoolSize());
         joinPool(p1);
     }
-    
+
     /**
      *    getTaskCount increases, but doesn't overestimate, when tasks
      *    submitted
      */
-    public void testGetTaskCount() {
-        ScheduledExecutor p1 = new ScheduledExecutor(1);
+    public void testGetTaskCount() throws InterruptedException {
+        ScheduledThreadPoolExecutor p1 = new ScheduledThreadPoolExecutor(1);
         assertEquals(0, p1.getTaskCount());
-        for(int i = 0; i < 5; i++)
+        for (int i = 0; i < 5; i++)
             p1.execute(new SmallRunnable());
-        try {
-            Thread.sleep(SHORT_DELAY_MS);
-        } catch(Exception e){
-            unexpectedException();
-        }
+        Thread.sleep(SHORT_DELAY_MS);
         assertEquals(5, p1.getTaskCount());
         joinPool(p1);
     }
-    
+
+    /**
+     * 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);
+        }
+    }
+
     /**
      *   is isShutDown is false before shutdown, true after
      */
     public void testIsShutdown() {
-        
-	ScheduledExecutor p1 = new ScheduledExecutor(1);
+
+        ScheduledThreadPoolExecutor p1 = new ScheduledThreadPoolExecutor(1);
         try {
             assertFalse(p1.isShutdown());
         }
         finally {
-            p1.shutdown();
+            try { p1.shutdown(); } catch (SecurityException ok) { return; }
         }
-	assertTrue(p1.isShutdown());
+        assertTrue(p1.isShutdown());
     }
 
-        
+
     /**
      *   isTerminated is false before termination, true after
      */
-    public void testIsTerminated() {
-	ScheduledExecutor p1 = new ScheduledExecutor(1);
+    public void testIsTerminated() throws InterruptedException {
+        ScheduledThreadPoolExecutor p1 = new ScheduledThreadPoolExecutor(1);
         try {
             p1.execute(new SmallRunnable());
         } finally {
-            p1.shutdown();
+            try { p1.shutdown(); } catch (SecurityException ok) { return; }
         }
-        try {
-	    assertTrue(p1.awaitTermination(LONG_DELAY_MS, TimeUnit.MILLISECONDS));
-            assertTrue(p1.isTerminated());
-	} catch(Exception e){
-            unexpectedException();
-        }	
+        assertTrue(p1.awaitTermination(LONG_DELAY_MS, MILLISECONDS));
+        assertTrue(p1.isTerminated());
     }
 
     /**
      *  isTerminating is not true when running or when terminated
      */
-    public void testIsTerminating() {
-	ScheduledExecutor p1 = new ScheduledExecutor(1);
+    public void testIsTerminating() throws InterruptedException {
+        ScheduledThreadPoolExecutor p1 = new ScheduledThreadPoolExecutor(1);
         assertFalse(p1.isTerminating());
         try {
             p1.execute(new SmallRunnable());
             assertFalse(p1.isTerminating());
         } finally {
-            p1.shutdown();
+            try { p1.shutdown(); } catch (SecurityException ok) { return; }
+        }
+
+        assertTrue(p1.awaitTermination(LONG_DELAY_MS, MILLISECONDS));
+        assertTrue(p1.isTerminated());
+        assertFalse(p1.isTerminating());
+    }
+
+    /**
+     * getQueue returns the work queue, which contains queued tasks
+     */
+    public void testGetQueue() throws InterruptedException {
+        ScheduledThreadPoolExecutor p1 = new ScheduledThreadPoolExecutor(1);
+        ScheduledFuture[] tasks = new ScheduledFuture[5];
+        for (int i = 0; i < 5; i++) {
+            tasks[i] = p1.schedule(new SmallPossiblyInterruptedRunnable(), 1, MILLISECONDS);
         }
         try {
-	    assertTrue(p1.awaitTermination(LONG_DELAY_MS, TimeUnit.MILLISECONDS));
-            assertTrue(p1.isTerminated());
-            assertFalse(p1.isTerminating());
-	} catch(Exception e){
-            unexpectedException();
-        }	
+            Thread.sleep(SHORT_DELAY_MS);
+            BlockingQueue<Runnable> q = p1.getQueue();
+            assertTrue(q.contains(tasks[4]));
+            assertFalse(q.contains(tasks[0]));
+        } finally {
+            joinPool(p1);
+        }
     }
 
     /**
-     *   purge removes cancelled tasks from the queue
-     */
-    public void testPurge() {
-        ScheduledExecutor p1 = new ScheduledExecutor(1);
-        ScheduledCancellable[] tasks = new ScheduledCancellable[5];
-        for(int i = 0; i < 5; i++){
-            tasks[i] = p1.schedule(new SmallRunnable(), 1, TimeUnit.MILLISECONDS);
-        }
-        int max = 5;
-        if (tasks[4].cancel(true)) --max;
-        if (tasks[3].cancel(true)) --max;
-        p1.purge();
-        long count = p1.getTaskCount();
-        assertTrue(count > 0 && count <= max);
-        joinPool(p1);
+     * remove(task) removes queued task, and fails to remove active task
+     */
+    public void testRemove() throws InterruptedException {
+        ScheduledThreadPoolExecutor p1 = new ScheduledThreadPoolExecutor(1);
+        ScheduledFuture[] tasks = new ScheduledFuture[5];
+        for (int i = 0; i < 5; i++) {
+            tasks[i] = p1.schedule(new SmallPossiblyInterruptedRunnable(), 1, MILLISECONDS);
+        }
+        try {
+            Thread.sleep(SHORT_DELAY_MS);
+            BlockingQueue<Runnable> q = p1.getQueue();
+            assertFalse(p1.remove((Runnable)tasks[0]));
+            assertTrue(q.contains((Runnable)tasks[4]));
+            assertTrue(q.contains((Runnable)tasks[3]));
+            assertTrue(p1.remove((Runnable)tasks[4]));
+            assertFalse(p1.remove((Runnable)tasks[4]));
+            assertFalse(q.contains((Runnable)tasks[4]));
+            assertTrue(q.contains((Runnable)tasks[3]));
+            assertTrue(p1.remove((Runnable)tasks[3]));
+            assertFalse(q.contains((Runnable)tasks[3]));
+        } finally {
+            joinPool(p1);
+        }
+    }
+
+    /**
+     *  purge removes cancelled tasks from the queue
+     */
+    public void testPurge() throws InterruptedException {
+        ScheduledThreadPoolExecutor p1 = new ScheduledThreadPoolExecutor(1);
+        ScheduledFuture[] tasks = new ScheduledFuture[5];
+        for (int i = 0; i < 5; i++) {
+            tasks[i] = p1.schedule(new SmallPossiblyInterruptedRunnable(), SHORT_DELAY_MS, MILLISECONDS);
+        }
+        try {
+            int max = 5;
+            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) {
+                p1.purge();
+                long count = p1.getTaskCount();
+                if (count >= 0 && count <= max)
+                    break;
+                Thread.sleep(1);
+            }
+            assertTrue(k < SMALL_DELAY_MS);
+        } finally {
+            joinPool(p1);
+        }
     }
 
     /**
      *  shutDownNow returns a list containing tasks that were not run
      */
-    public void testShutDownNow() {
-	ScheduledExecutor p1 = new ScheduledExecutor(1);
-        for(int i = 0; i < 5; i++)
-            p1.schedule(new SmallRunnable(), SHORT_DELAY_MS, TimeUnit.MILLISECONDS);
-        List l = p1.shutdownNow();
-	assertTrue(p1.isShutdown());
-	assertTrue(l.size() > 0 && l.size() <= 5);
+    public void testShutDownNow() throws InterruptedException {
+        ScheduledThreadPoolExecutor p1 = new ScheduledThreadPoolExecutor(1);
+        for (int i = 0; i < 5; i++)
+            p1.schedule(new SmallPossiblyInterruptedRunnable(), SHORT_DELAY_MS, MILLISECONDS);
+        List l;
+        try {
+            l = p1.shutdownNow();
+        } catch (SecurityException ok) {
+            return;
+        }
+        assertTrue(p1.isShutdown());
+        assertTrue(l.size() > 0 && l.size() <= 5);
         joinPool(p1);
     }
 
@@ -434,31 +498,25 @@ public class ScheduledExecutorTest exten
      * In default setting, shutdown cancels periodic but not delayed
      * tasks at shutdown
      */
-    public void testShutDown1() {
-        try {
-            ScheduledExecutor p1 = new ScheduledExecutor(1);
-            assertTrue(p1.getExecuteExistingDelayedTasksAfterShutdownPolicy());
-            assertFalse(p1.getContinueExistingPeriodicTasksAfterShutdownPolicy());
-
-            ScheduledCancellable[] tasks = new ScheduledCancellable[5];
-            for(int i = 0; i < 5; i++)
-                tasks[i] = p1.schedule(new NoOpRunnable(), SHORT_DELAY_MS, TimeUnit.MILLISECONDS);
-            p1.shutdown();
-            BlockingQueue q = p1.getQueue();
-            for (Iterator it = q.iterator(); it.hasNext();) {
-                ScheduledCancellable t = (ScheduledCancellable)it.next();
-                assertFalse(t.isCancelled());
-            }
-            assertTrue(p1.isShutdown());
-            Thread.sleep(SMALL_DELAY_MS);
-            for (int i = 0; i < 5; ++i) {
-                assertTrue(tasks[i].isDone());
-                assertFalse(tasks[i].isCancelled());
-            }
-            
-        }
-        catch(Exception ex) {
-            unexpectedException();
+    public void testShutDown1() throws InterruptedException {
+        ScheduledThreadPoolExecutor p1 = new ScheduledThreadPoolExecutor(1);
+        assertTrue(p1.getExecuteExistingDelayedTasksAfterShutdownPolicy());
+        assertFalse(p1.getContinueExistingPeriodicTasksAfterShutdownPolicy());
+
+        ScheduledFuture[] tasks = new ScheduledFuture[5];
+        for (int i = 0; i < 5; i++)
+            tasks[i] = p1.schedule(new NoOpRunnable(), SHORT_DELAY_MS, MILLISECONDS);
+        try { p1.shutdown(); } catch (SecurityException ok) { return; }
+        BlockingQueue q = p1.getQueue();
+        for (Iterator it = q.iterator(); it.hasNext();) {
+            ScheduledFuture t = (ScheduledFuture)it.next();
+            assertFalse(t.isCancelled());
+        }
+        assertTrue(p1.isShutdown());
+        Thread.sleep(SMALL_DELAY_MS);
+        for (int i = 0; i < 5; ++i) {
+            assertTrue(tasks[i].isDone());
+            assertFalse(tasks[i].isCancelled());
         }
     }
 
@@ -467,23 +525,18 @@ public class ScheduledExecutorTest exten
      * If setExecuteExistingDelayedTasksAfterShutdownPolicy is false,
      * delayed tasks are cancelled at shutdown
      */
-    public void testShutDown2() {
-        try {
-            ScheduledExecutor p1 = new ScheduledExecutor(1);
-            p1.setExecuteExistingDelayedTasksAfterShutdownPolicy(false);
-            ScheduledCancellable[] tasks = new ScheduledCancellable[5];
-            for(int i = 0; i < 5; i++)
-                tasks[i] = p1.schedule(new NoOpRunnable(), SHORT_DELAY_MS, TimeUnit.MILLISECONDS);
-            p1.shutdown();
-            assertTrue(p1.isShutdown());
-            BlockingQueue q = p1.getQueue();
-            assertTrue(q.isEmpty());
-            Thread.sleep(SMALL_DELAY_MS);
-            assertTrue(p1.isTerminated());
-        }
-        catch(Exception ex) {
-            unexpectedException();
-        }
+    public void testShutDown2() throws InterruptedException {
+        ScheduledThreadPoolExecutor p1 = new ScheduledThreadPoolExecutor(1);
+        p1.setExecuteExistingDelayedTasksAfterShutdownPolicy(false);
+        ScheduledFuture[] tasks = new ScheduledFuture[5];
+        for (int i = 0; i < 5; i++)
+            tasks[i] = p1.schedule(new NoOpRunnable(), SHORT_DELAY_MS, MILLISECONDS);
+        try { p1.shutdown(); } catch (SecurityException ok) { return; }
+        assertTrue(p1.isShutdown());
+        BlockingQueue q = p1.getQueue();
+        assertTrue(q.isEmpty());
+        Thread.sleep(SMALL_DELAY_MS);
+        assertTrue(p1.isTerminated());
     }
 
 
@@ -491,52 +544,470 @@ public class ScheduledExecutorTest exten
      * If setContinueExistingPeriodicTasksAfterShutdownPolicy is set false,
      * periodic tasks are not cancelled at shutdown
      */
-    public void testShutDown3() {
-        try {
-            ScheduledExecutor p1 = new ScheduledExecutor(1);
-            p1.setContinueExistingPeriodicTasksAfterShutdownPolicy(false);
-            ScheduledCancellable task =
-                p1.scheduleAtFixedRate(new NoOpRunnable(), 5, 5, TimeUnit.MILLISECONDS);
-            p1.shutdown();
-            assertTrue(p1.isShutdown());
-            BlockingQueue q = p1.getQueue();
-            assertTrue(q.isEmpty());
-            Thread.sleep(SHORT_DELAY_MS);
-            assertTrue(p1.isTerminated());
-        }
-        catch(Exception ex) {
-            unexpectedException();
-        }
+    public void testShutDown3() throws InterruptedException {
+        ScheduledThreadPoolExecutor p1 = new ScheduledThreadPoolExecutor(1);
+        p1.setContinueExistingPeriodicTasksAfterShutdownPolicy(false);
+        ScheduledFuture task =
+            p1.scheduleAtFixedRate(new NoOpRunnable(), 5, 5, MILLISECONDS);
+        try { p1.shutdown(); } catch (SecurityException ok) { return; }
+        assertTrue(p1.isShutdown());
+        BlockingQueue q = p1.getQueue();
+        assertTrue(q.isEmpty());
+        Thread.sleep(SHORT_DELAY_MS);
+        assertTrue(p1.isTerminated());
     }
 
     /**
      * if setContinueExistingPeriodicTasksAfterShutdownPolicy is true,
      * periodic tasks are cancelled at shutdown
      */
-    public void testShutDown4() {
-        ScheduledExecutor p1 = new ScheduledExecutor(1);
+    public void testShutDown4() throws InterruptedException {
+        ScheduledThreadPoolExecutor p1 = new ScheduledThreadPoolExecutor(1);
         try {
             p1.setContinueExistingPeriodicTasksAfterShutdownPolicy(true);
-            ScheduledCancellable task =
-                p1.scheduleAtFixedRate(new NoOpRunnable(), 5, 5, TimeUnit.MILLISECONDS);
+            ScheduledFuture task =
+                p1.scheduleAtFixedRate(new NoOpRunnable(), 1, 1, MILLISECONDS);
             assertFalse(task.isCancelled());
-            p1.shutdown();
+            try { p1.shutdown(); } catch (SecurityException ok) { return; }
             assertFalse(task.isCancelled());
             assertFalse(p1.isTerminated());
             assertTrue(p1.isShutdown());
             Thread.sleep(SHORT_DELAY_MS);
             assertFalse(task.isCancelled());
-            task.cancel(true);
-            assertTrue(task.isCancelled());
+            assertTrue(task.cancel(true));
+            assertTrue(task.isDone());
             Thread.sleep(SHORT_DELAY_MS);
             assertTrue(p1.isTerminated());
         }
-        catch(Exception ex) {
-            unexpectedException();
-        }
         finally {
-            p1.shutdownNow();
+            joinPool(p1);
+        }
+    }
+
+    /**
+     * 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);
+        }
+    }
+
+
 }