--- jsr166/src/test/tck/ScheduledExecutorTest.java	2003/08/31 19:24:55	1.1
+++ jsr166/src/test/tck/ScheduledExecutorTest.java	2003/12/27 19:26:43	1.13
@@ -1,263 +1,1081 @@
 /*
- * 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.*;
 
-public class ScheduledExecutorTest extends TestCase{
-    
-    boolean flag = false;
-
+public class ScheduledExecutorTest extends JSR166TestCase {
     public static void main(String[] args) {
 	junit.textui.TestRunner.run (suite());	
     }
-    
-
     public static Test suite() {
 	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);
+     * execute successfully executes a runnable
+     */
+    public void testExecute() {
+	try {
+            TrackedShortRunnable runnable =new TrackedShortRunnable();
+            ScheduledThreadPoolExecutor p1 = new ScheduledThreadPoolExecutor(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);
-            one.shutdown();
+            p1.shutdown();
+            joinPool(p1);
         }
 	catch(Exception e){
-            fail("unexpected exception");
+            unexpectedException();
         }
+        
     }
 
+
     /**
-     *  Test to verify schedule successfully runs the given Callable.
-     *  The waiting flag shows that the Callable is not started until
-     *  immediately.
+     * delayed schedule of callable successfully executes after delay
      */
-    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);
+    public void testSchedule1() {
+	try {
+            TrackedCallable callable = new TrackedCallable();
+            ScheduledThreadPoolExecutor p1 = new ScheduledThreadPoolExecutor(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());
-            one.shutdown();
-	}catch(RejectedExecutionException e){}
-	catch(Exception e){}
+            p1.shutdown();
+            joinPool(p1);
+	} catch(RejectedExecutionException e){}
+	catch(Exception e){
+            e.printStackTrace();
+            unexpectedException();
+        }
     }
 
     /**
-     *  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);
+     *  delayed schedule of runnable successfully executes after delay
+     */
+    public void testSchedule3() {
+	try {
+            TrackedShortRunnable runnable = new TrackedShortRunnable();
+            ScheduledThreadPoolExecutor p1 = new ScheduledThreadPoolExecutor(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);
-            one.shutdown();
+            p1.shutdown();
+            joinPool(p1);
         } catch(Exception e){
-            fail("unexpected exception");
+            unexpectedException();
         }
     }
     
     /**
-     *  The final version of schedule, using both long, TimeUnit and Runnable
+     * scheduleAtFixedRate executes runnable after given initial delay
+     */
+    public void testSchedule4() {
+	try {
+            TrackedShortRunnable runnable = new TrackedShortRunnable();
+            ScheduledThreadPoolExecutor p1 = new ScheduledThreadPoolExecutor(1);
+	    ScheduledFuture 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();
+        }
+    }
+
+    /**
+     * scheduleWithFixedDelay executes runnable after given initial delay
      */
-    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);
+    public void testSchedule5() {
+	try {
+            TrackedShortRunnable runnable = new TrackedShortRunnable();
+            ScheduledThreadPoolExecutor p1 = new ScheduledThreadPoolExecutor(1);
+	    ScheduledFuture h = p1.scheduleWithFixedDelay(runnable, SHORT_DELAY_MS, SHORT_DELAY_MS, TimeUnit.MILLISECONDS);
+	    assertFalse(runnable.done);
+	    Thread.sleep(MEDIUM_DELAY_MS);
 	    assertTrue(runnable.done);
-            one.shutdown();
+            h.cancel(true);
+            p1.shutdown();
+            joinPool(p1);
         } catch(Exception e){
-            fail("unexpected exception");
+            unexpectedException();
         }
     }
     
-   
-    // exception tests
+    /**
+     *  execute (null) throws NPE
+     */
+    public void testExecuteNull() {
+        ScheduledThreadPoolExecutor se = null;
+        try {
+	    se = new ScheduledThreadPoolExecutor(1);
+	    se.execute(null);
+            shouldThrow();
+	} catch(NullPointerException success){}
+	catch(Exception e){
+            unexpectedException();
+        }
+	
+	joinPool(se);
+    }
 
     /**
-     *  Test to verify schedule(Runnable, long) throws RejectedExecutionException
-     *  This occurs on an attempt to schedule a task on a shutdown executor
+     * schedule (null) throws NPE
+     */
+    public void testScheduleNull() {
+        ScheduledThreadPoolExecutor se = new ScheduledThreadPoolExecutor(1);
+	try {
+            TrackedCallable callable = null;
+	    Future f = se.schedule(callable, SHORT_DELAY_MS, TimeUnit.MILLISECONDS);
+            shouldThrow();
+	} catch(NullPointerException success){}
+	catch(Exception e){
+            unexpectedException();
+        }
+	joinPool(se);
+    }
+   
+    /**
+     * execute throws RejectedExecutionException if shutdown
      */
-    public void testSchedule1_RejectedExecutionException(){
-        try{
-            ScheduledExecutor se = new ScheduledExecutor(1);
+    public void testSchedule1_RejectedExecutionException() {
+        ScheduledThreadPoolExecutor se = new ScheduledThreadPoolExecutor(1);
+        try {
             se.shutdown();
-            se.schedule(new Runnable(){
-                    public void run(){}
-                }, 10000, TimeUnit.MILLISECONDS);
-            fail("shoud throw");
-        }catch(RejectedExecutionException e){}    
+            se.schedule(new NoOpRunnable(),
+                        MEDIUM_DELAY_MS, TimeUnit.MILLISECONDS);
+            shouldThrow();
+        } catch(RejectedExecutionException success){
+        }
+        joinPool(se);
+
     }
 
     /**
-     *  Test to verify schedule(Callable, long, TimeUnit) throws RejectedExecutionException
-     *  This occurs on an attempt to schedule a task on a shutdown executor
+     * schedule throws RejectedExecutionException if shutdown
      */
-    public void testSchedule2_RejectedExecutionException(){
-        try{
-            ScheduledExecutor se = new ScheduledExecutor(1);
+    public void testSchedule2_RejectedExecutionException() {
+        ScheduledThreadPoolExecutor se = new ScheduledThreadPoolExecutor(1);
+        try {
             se.shutdown();
-            se.schedule(new Callable(){
-                    public Object call(){ 
-                        return Boolean.TRUE;
-                    }
-                }, (long)100, TimeUnit.SECONDS);
-            fail("should throw");
-        }catch(RejectedExecutionException e){}    
+            se.schedule(new NoOpCallable(),
+                        MEDIUM_DELAY_MS, TimeUnit.MILLISECONDS);
+            shouldThrow();
+        } catch(RejectedExecutionException success){
+        }
+        joinPool(se);
     }
 
     /**
-     *  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);
+     * schedule callable throws RejectedExecutionException if shutdown
+     */
+     public void testSchedule3_RejectedExecutionException() {
+         ScheduledThreadPoolExecutor se = new ScheduledThreadPoolExecutor(1);
+         try {
             se.shutdown();
-            se.schedule(new Callable(){
-                    public Object call(){ 
-                        return Boolean.TRUE;
-                    }
-                },  10000, TimeUnit.MILLISECONDS);
-            fail("should throw");
-        }catch(RejectedExecutionException e){}    
+            se.schedule(new NoOpCallable(),
+                        MEDIUM_DELAY_MS, TimeUnit.MILLISECONDS);
+            shouldThrow();
+        } catch(RejectedExecutionException success){
+        } 
+         joinPool(se);
     }
 
     /**
-     *  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 throws RejectedExecutionException if shutdown
+     */
+    public void testScheduleAtFixedRate1_RejectedExecutionException() {
+        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){}    
+            se.scheduleAtFixedRate(new NoOpRunnable(),
+                                   MEDIUM_DELAY_MS, MEDIUM_DELAY_MS, TimeUnit.MILLISECONDS);
+            shouldThrow();
+        } catch(RejectedExecutionException success){
+        } 
+        joinPool(se);
     }
     
     /**
-     *  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);
+     * scheduleWithFixedDelay throws RejectedExecutionException if shutdown
+     */
+    public void testScheduleWithFixedDelay1_RejectedExecutionException() {
+        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.scheduleWithFixedDelay(new NoOpRunnable(),
+                                      MEDIUM_DELAY_MS, MEDIUM_DELAY_MS, TimeUnit.MILLISECONDS);
+            shouldThrow();
+        } catch(RejectedExecutionException success){
+        } 
+        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
+     *  getActiveCount increases but doesn't overestimate, when a
+     *  thread becomes active
      */
-    public void testScheduleWithFixedDelay1_RejectedExecutionException(){
-        try{
-            ScheduledExecutor se = new ScheduledExecutor(1);
-            se.shutdown();
-            se.scheduleWithFixedDelay(new Runnable(){
-                    public void run(){}
-                }, 100, 100, TimeUnit.SECONDS);
-            fail("should throw");
-        }catch(RejectedExecutionException e){}    
+    public void testGetActiveCount() {
+        ScheduledThreadPoolExecutor p2 = new ScheduledThreadPoolExecutor(2);
+        assertEquals(0, p2.getActiveCount());
+        p2.execute(new SmallRunnable());
+        try {
+            Thread.sleep(SHORT_DELAY_MS);
+        } catch(Exception e){
+            unexpectedException();
+        }
+        assertEquals(1, p2.getActiveCount());
+        joinPool(p2);
+    }
+    
+    /**
+     *    getCompletedTaskCount increases, but doesn't overestimate,
+     *   when tasks complete
+     */
+    public void testGetCompletedTaskCount() {
+        ScheduledThreadPoolExecutor p2 = new ScheduledThreadPoolExecutor(2);
+        assertEquals(0, p2.getCompletedTaskCount());
+        p2.execute(new SmallRunnable());
+        try {
+            Thread.sleep(MEDIUM_DELAY_MS);
+        } catch(Exception e){
+            unexpectedException();
+        }
+        assertEquals(1, p2.getCompletedTaskCount());
+        joinPool(p2);
+    }
+    
+    /**
+     *  getCorePoolSize returns size given in constructor if not otherwise set 
+     */
+    public void testGetCorePoolSize() {
+        ScheduledThreadPoolExecutor p1 = new ScheduledThreadPoolExecutor(1);
+        assertEquals(1, p1.getCorePoolSize());
+        joinPool(p1);
+    }
+    
+    /**
+     *    getLargestPoolSize increases, but doesn't overestimate, when
+     *   multiple threads active
+     */
+    public void testGetLargestPoolSize() {
+        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();
+        }
+        assertEquals(2, p2.getLargestPoolSize());
+        joinPool(p2);
+    }
+    
+    /**
+     *   getPoolSize increases, but doesn't overestimate, when threads
+     *   become active
+     */
+    public void testGetPoolSize() {
+        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() {
+        ScheduledThreadPoolExecutor p1 = new ScheduledThreadPoolExecutor(1);
+        assertEquals(0, p1.getTaskCount());
+        for(int i = 0; i < 5; i++)
+            p1.execute(new SmallRunnable());
+        try {
+            Thread.sleep(SHORT_DELAY_MS);
+        } catch(Exception e){
+            unexpectedException();
+        }
+        assertEquals(5, p1.getTaskCount());
+        joinPool(p1);
     }
 
+    /** 
+     * getThreadFactory returns factory in constructor if not set
+     */
+    public void testGetThreadFactory() {
+        ThreadFactory tf = new SimpleThreadFactory();
+	ScheduledThreadPoolExecutor p = new ScheduledThreadPoolExecutor(1, tf);
+        assertSame(tf, p.getThreadFactory());
+        p.shutdown();
+        joinPool(p);
+    }
+
+    /** 
+     * setThreadFactory sets the thread factory returned by getThreadFactory
+     */
+    public void testSetThreadFactory() {
+        ThreadFactory tf = new SimpleThreadFactory();
+	ScheduledThreadPoolExecutor p = new ScheduledThreadPoolExecutor(1);
+        p.setThreadFactory(tf);
+        assertSame(tf, p.getThreadFactory());
+        p.shutdown();
+        joinPool(p);
+    }
+
+    /** 
+     * setThreadFactory(null) throws NPE
+     */
+    public void testSetThreadFactoryNull() {
+	ScheduledThreadPoolExecutor p = new ScheduledThreadPoolExecutor(1);
+        try {
+            p.setThreadFactory(null);
+            shouldThrow();
+        } catch (NullPointerException success) {
+        } finally {
+            joinPool(p);
+        }
+    }
+    
     /**
-     *  Test to verify scheduleWithFixedDelay(Runnable, long, long, TimeUnit) throws 
-     *  RejectedExecutionException.
-     *  This occurs on an attempt to schedule a task on a shutdown executor
+     *   is isShutDown is false before shutdown, true after
      */
-     public void testScheduleWithFixedDelay2_RejectedExecutionException(){
-        try{
-            ScheduledExecutor se = new ScheduledExecutor(1);
-            se.shutdown();
-            se.scheduleWithFixedDelay(new Runnable(){
-                    public void run(){}
-                },  1, 100, TimeUnit.SECONDS);
-            fail("should throw");
-        }catch(RejectedExecutionException e){}    
+    public void testIsShutdown() {
+        
+	ScheduledThreadPoolExecutor p1 = new ScheduledThreadPoolExecutor(1);
+        try {
+            assertFalse(p1.isShutdown());
+        }
+        finally {
+            p1.shutdown();
+        }
+	assertTrue(p1.isShutdown());
     }
 
+        
     /**
-     *  Test to verify execute throws RejectedExecutionException
-     *  This occurs on an attempt to schedule a task on a shutdown executor
+     *   isTerminated is false before termination, true after
      */
-    public void testExecute_RejectedExecutionException(){
-        try{
-            ScheduledExecutor se = new ScheduledExecutor(1);
-            se.shutdown();
-            se.execute(new Runnable(){
-                    public void run(){}
-                });
-            fail("should throw");
-        }catch(RejectedExecutionException e){}    
+    public void testIsTerminated() {
+	ScheduledThreadPoolExecutor p1 = new ScheduledThreadPoolExecutor(1);
+        try {
+            p1.execute(new SmallRunnable());
+        } finally {
+            p1.shutdown();
+        }
+        try {
+	    assertTrue(p1.awaitTermination(LONG_DELAY_MS, TimeUnit.MILLISECONDS));
+            assertTrue(p1.isTerminated());
+	} catch(Exception e){
+            unexpectedException();
+        }	
+    }
+
+    /**
+     *  isTerminating is not true when running or when terminated
+     */
+    public void testIsTerminating() {
+	ScheduledThreadPoolExecutor p1 = new ScheduledThreadPoolExecutor(1);
+        assertFalse(p1.isTerminating());
+        try {
+            p1.execute(new SmallRunnable());
+            assertFalse(p1.isTerminating());
+        } finally {
+            p1.shutdown();
+        }
+        try {
+	    assertTrue(p1.awaitTermination(LONG_DELAY_MS, TimeUnit.MILLISECONDS));
+            assertTrue(p1.isTerminated());
+            assertFalse(p1.isTerminating());
+	} catch(Exception e){
+            unexpectedException();
+        }	
+    }
+
+    /**
+     * getQueue returns the work queue, which contains queued tasks
+     */
+    public void testGetQueue() {
+        ScheduledThreadPoolExecutor p1 = new ScheduledThreadPoolExecutor(1);
+        ScheduledFuture[] tasks = new ScheduledFuture[5];
+        for(int i = 0; i < 5; i++){
+            tasks[i] = p1.schedule(new SmallPossiblyInterruptedRunnable(), 1, TimeUnit.MILLISECONDS);
+        }
+        try {
+            Thread.sleep(SHORT_DELAY_MS);
+            BlockingQueue<Runnable> q = p1.getQueue();
+            assertTrue(q.contains(tasks[4]));
+            assertFalse(q.contains(tasks[0]));
+            p1.shutdownNow();
+        } catch(Exception e) {
+            unexpectedException();
+        } finally {
+            joinPool(p1);
+        }
+    }
+
+    /**
+     * remove(task) removes queued task, and fails to remove active task
+     */
+    public void testRemove() {
+        ScheduledThreadPoolExecutor p1 = new ScheduledThreadPoolExecutor(1);
+        ScheduledFuture[] tasks = new ScheduledFuture[5];
+        for(int i = 0; i < 5; i++){
+            tasks[i] = p1.schedule(new SmallPossiblyInterruptedRunnable(), 1, TimeUnit.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]));
+            p1.shutdownNow();
+        } catch(Exception e) {
+            unexpectedException();
+        } finally {
+            joinPool(p1);
+        }
+    }
+
+    /**
+     *  purge removes cancelled tasks from the queue
+     */
+    public void testPurge() {
+        ScheduledThreadPoolExecutor p1 = new ScheduledThreadPoolExecutor(1);
+        ScheduledFuture[] tasks = new ScheduledFuture[5];
+        for(int i = 0; i < 5; i++){
+            tasks[i] = p1.schedule(new SmallPossiblyInterruptedRunnable(), 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);
+    }
+
+    /**
+     *  shutDownNow returns a list containing tasks that were not run
+     */
+    public void testShutDownNow() {
+	ScheduledThreadPoolExecutor p1 = new ScheduledThreadPoolExecutor(1);
+        for(int i = 0; i < 5; i++)
+            p1.schedule(new SmallPossiblyInterruptedRunnable(), SHORT_DELAY_MS, TimeUnit.MILLISECONDS);
+        List l = p1.shutdownNow();
+	assertTrue(p1.isShutdown());
+	assertTrue(l.size() > 0 && l.size() <= 5);
+        joinPool(p1);
+    }
+
+    /**
+     * In default setting, shutdown cancels periodic but not delayed
+     * tasks at shutdown
+     */
+    public void testShutDown1() {
+        try {
+            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, TimeUnit.MILLISECONDS);
+            p1.shutdown();
+            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());
+            }
+            
+        }
+        catch(Exception ex) {
+            unexpectedException();
+        }
     }
 
+
+    /**
+     * If setExecuteExistingDelayedTasksAfterShutdownPolicy is false,
+     * delayed tasks are cancelled at shutdown
+     */
+    public void testShutDown2() {
+        try {
+            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, 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();
+        }
+    }
+
+
+    /**
+     * If setContinueExistingPeriodicTasksAfterShutdownPolicy is set false,
+     * periodic tasks are not cancelled at shutdown
+     */
+    public void testShutDown3() {
+        try {
+            ScheduledThreadPoolExecutor p1 = new ScheduledThreadPoolExecutor(1);
+            p1.setContinueExistingPeriodicTasksAfterShutdownPolicy(false);
+            ScheduledFuture 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();
+        }
+    }
+
+    /**
+     * if setContinueExistingPeriodicTasksAfterShutdownPolicy is true,
+     * periodic tasks are cancelled at shutdown
+     */
+    public void testShutDown4() {
+        ScheduledThreadPoolExecutor p1 = new ScheduledThreadPoolExecutor(1);
+        try {
+            p1.setContinueExistingPeriodicTasksAfterShutdownPolicy(true);
+            ScheduledFuture task =
+                p1.scheduleAtFixedRate(new NoOpRunnable(), 5, 5, TimeUnit.MILLISECONDS);
+            assertFalse(task.isCancelled());
+            p1.shutdown();
+            assertFalse(task.isCancelled());
+            assertFalse(p1.isTerminated());
+            assertTrue(p1.isShutdown());
+            Thread.sleep(SHORT_DELAY_MS);
+            assertFalse(task.isCancelled());
+            task.cancel(true);
+            assertTrue(task.isCancelled());
+            Thread.sleep(SHORT_DELAY_MS);
+            assertTrue(p1.isTerminated());
+        }
+        catch(Exception ex) {
+            unexpectedException();
+        }
+        finally {
+            p1.shutdownNow();
+        }
+    }
+
+    /**
+     * completed submit of callable returns result
+     */
+    public void testSubmitCallable() {
+        ExecutorService e = new ScheduledThreadPoolExecutor(2);
+        try {
+            Future<String> future = e.submit(new StringTask());
+            String result = future.get();
+            assertSame(TEST_STRING, result);
+        }
+        catch (ExecutionException ex) {
+            unexpectedException();
+        }
+        catch (InterruptedException ex) {
+            unexpectedException();
+        } finally {
+            joinPool(e);
+        }
+    }
+
+    /**
+     * completed submit of runnable returns successfully
+     */
+    public void testSubmitRunnable() {
+        ExecutorService e = new ScheduledThreadPoolExecutor(2);
+        try {
+            Future<?> future = e.submit(new NoOpRunnable());
+            future.get();
+            assertTrue(future.isDone());
+        }
+        catch (ExecutionException ex) {
+            unexpectedException();
+        }
+        catch (InterruptedException ex) {
+            unexpectedException();
+        } finally {
+            joinPool(e);
+        }
+    }
+
+    /**
+     * completed submit of (runnable, result) returns result
+     */
+    public void testSubmitRunnable2() {
+        ExecutorService e = new ScheduledThreadPoolExecutor(2);
+        try {
+            Future<String> future = e.submit(new NoOpRunnable(), TEST_STRING);
+            String result = future.get();
+            assertSame(TEST_STRING, result);
+        }
+        catch (ExecutionException ex) {
+            unexpectedException();
+        }
+        catch (InterruptedException ex) {
+            unexpectedException();
+        } finally {
+            joinPool(e);
+        }
+    }
+
+
+
+
+
+    /**
+     * invokeAny(null) throws NPE
+     */
+    public void testInvokeAny1() {
+        ExecutorService e = new ScheduledThreadPoolExecutor(2);
+        try {
+            e.invokeAny(null);
+        } catch (NullPointerException success) {
+        } catch(Exception ex) {
+            unexpectedException();
+        } finally {
+            joinPool(e);
+        }
+    }
+
+    /**
+     * invokeAny(empty collection) throws IAE
+     */
+    public void testInvokeAny2() {
+        ExecutorService e = new ScheduledThreadPoolExecutor(2);
+        try {
+            e.invokeAny(new ArrayList<Callable<String>>());
+        } catch (IllegalArgumentException success) {
+        } catch(Exception ex) {
+            unexpectedException();
+        } finally {
+            joinPool(e);
+        }
+    }
+
+    /**
+     * invokeAny(c) throws NPE if c has null elements
+     */
+    public void testInvokeAny3() {
+        ExecutorService e = new ScheduledThreadPoolExecutor(2);
+        try {
+            ArrayList<Callable<String>> l = new ArrayList<Callable<String>>();
+            l.add(new StringTask());
+            l.add(null);
+            e.invokeAny(l);
+        } catch (NullPointerException success) {
+        } catch(Exception ex) {
+            unexpectedException();
+        } finally {
+            joinPool(e);
+        }
+    }
+
+    /**
+     * invokeAny(c) throws ExecutionException if no task completes
+     */
+    public void testInvokeAny4() {
+        ExecutorService e = new ScheduledThreadPoolExecutor(2);
+        try {
+            ArrayList<Callable<String>> l = new ArrayList<Callable<String>>();
+            l.add(new NPETask());
+            e.invokeAny(l);
+        } catch (ExecutionException success) {
+        } catch(Exception ex) {
+            unexpectedException();
+        } finally {
+            joinPool(e);
+        }
+    }
+
+    /**
+     * invokeAny(c) returns result of some task
+     */
+    public void testInvokeAny5() {
+        ExecutorService e = new ScheduledThreadPoolExecutor(2);
+        try {
+            ArrayList<Callable<String>> l = new ArrayList<Callable<String>>();
+            l.add(new StringTask());
+            l.add(new StringTask());
+            String result = e.invokeAny(l);
+            assertSame(TEST_STRING, result);
+        } catch (ExecutionException success) {
+        } catch(Exception ex) {
+            unexpectedException();
+        } finally {
+            joinPool(e);
+        }
+    }
+
+    /**
+     * invokeAll(null) throws NPE
+     */
+    public void testInvokeAll1() {
+        ExecutorService e = new ScheduledThreadPoolExecutor(2);
+        try {
+            e.invokeAll(null);
+        } catch (NullPointerException success) {
+        } catch(Exception ex) {
+            unexpectedException();
+        } finally {
+            joinPool(e);
+        }
+    }
+
+    /**
+     * invokeAll(empty collection) returns empty collection
+     */
+    public void testInvokeAll2() {
+        ExecutorService e = new ScheduledThreadPoolExecutor(2);
+        try {
+            List<Future<String>> r = e.invokeAll(new ArrayList<Callable<String>>());
+            assertTrue(r.isEmpty());
+        } catch(Exception ex) {
+            unexpectedException();
+        } finally {
+            joinPool(e);
+        }
+    }
+
+    /**
+     * invokeAll(c) throws NPE if c has null elements
+     */
+    public void testInvokeAll3() {
+        ExecutorService e = new ScheduledThreadPoolExecutor(2);
+        try {
+            ArrayList<Callable<String>> l = new ArrayList<Callable<String>>();
+            l.add(new StringTask());
+            l.add(null);
+            e.invokeAll(l);
+        } catch (NullPointerException success) {
+        } catch(Exception ex) {
+            unexpectedException();
+        } finally {
+            joinPool(e);
+        }
+    }
+
+    /**
+     * get of invokeAll(c) throws exception on failed task
+     */
+    public void testInvokeAll4() {
+        ExecutorService e = new ScheduledThreadPoolExecutor(2);
+        try {
+            ArrayList<Callable<String>> l = new ArrayList<Callable<String>>();
+            l.add(new NPETask());
+            List<Future<String>> result = e.invokeAll(l);
+            assertEquals(1, result.size());
+            for (Iterator<Future<String>> it = result.iterator(); it.hasNext();) 
+                it.next().get();
+        } catch(ExecutionException success) {
+        } catch(Exception ex) {
+            unexpectedException();
+        } finally {
+            joinPool(e);
+        }
+    }
+
+    /**
+     * invokeAll(c) returns results of all completed tasks
+     */
+    public void testInvokeAll5() {
+        ExecutorService e = new ScheduledThreadPoolExecutor(2);
+        try {
+            ArrayList<Callable<String>> l = new ArrayList<Callable<String>>();
+            l.add(new StringTask());
+            l.add(new StringTask());
+            List<Future<String>> result = e.invokeAll(l);
+            assertEquals(2, result.size());
+            for (Iterator<Future<String>> it = result.iterator(); it.hasNext();) 
+                assertSame(TEST_STRING, it.next().get());
+        } catch (ExecutionException success) {
+        } catch(Exception ex) {
+            unexpectedException();
+        } finally {
+            joinPool(e);
+        }
+    }
+
+    /**
+     * timed invokeAny(null) throws NPE
+     */
+    public void testTimedInvokeAny1() {
+        ExecutorService e = new ScheduledThreadPoolExecutor(2);
+        try {
+            e.invokeAny(null, MEDIUM_DELAY_MS, TimeUnit.MILLISECONDS);
+        } catch (NullPointerException success) {
+        } catch(Exception ex) {
+            unexpectedException();
+        } finally {
+            joinPool(e);
+        }
+    }
+
+    /**
+     * timed invokeAny(,,null) throws NPE
+     */
+    public void testTimedInvokeAnyNullTimeUnit() {
+        ExecutorService e = new ScheduledThreadPoolExecutor(2);
+        try {
+            ArrayList<Callable<String>> l = new ArrayList<Callable<String>>();
+            l.add(new StringTask());
+            e.invokeAny(l, MEDIUM_DELAY_MS, null);
+        } catch (NullPointerException success) {
+        } catch(Exception ex) {
+            unexpectedException();
+        } finally {
+            joinPool(e);
+        }
+    }
+
+    /**
+     * timed invokeAny(empty collection) throws IAE
+     */
+    public void testTimedInvokeAny2() {
+        ExecutorService e = new ScheduledThreadPoolExecutor(2);
+        try {
+            e.invokeAny(new ArrayList<Callable<String>>(), MEDIUM_DELAY_MS, TimeUnit.MILLISECONDS);
+        } catch (IllegalArgumentException success) {
+        } catch(Exception ex) {
+            unexpectedException();
+        } finally {
+            joinPool(e);
+        }
+    }
+
+    /**
+     * timed invokeAny(c) throws NPE if c has null elements
+     */
+    public void testTimedInvokeAny3() {
+        ExecutorService e = new ScheduledThreadPoolExecutor(2);
+        try {
+            ArrayList<Callable<String>> l = new ArrayList<Callable<String>>();
+            l.add(new StringTask());
+            l.add(null);
+            e.invokeAny(l, MEDIUM_DELAY_MS, TimeUnit.MILLISECONDS);
+        } catch (NullPointerException success) {
+        } catch(Exception ex) {
+            ex.printStackTrace();
+            unexpectedException();
+        } finally {
+            joinPool(e);
+        }
+    }
+
+    /**
+     * timed invokeAny(c) throws ExecutionException if no task completes
+     */
+    public void testTimedInvokeAny4() {
+        ExecutorService e = new ScheduledThreadPoolExecutor(2);
+        try {
+            ArrayList<Callable<String>> l = new ArrayList<Callable<String>>();
+            l.add(new NPETask());
+            e.invokeAny(l, MEDIUM_DELAY_MS, TimeUnit.MILLISECONDS);
+        } catch(ExecutionException success) {
+        } catch(Exception ex) {
+            unexpectedException();
+        } finally {
+            joinPool(e);
+        }
+    }
+
+    /**
+     * timed invokeAny(c) returns result of some task
+     */
+    public void testTimedInvokeAny5() {
+        ExecutorService e = new ScheduledThreadPoolExecutor(2);
+        try {
+            ArrayList<Callable<String>> l = new ArrayList<Callable<String>>();
+            l.add(new StringTask());
+            l.add(new StringTask());
+            String result = e.invokeAny(l, MEDIUM_DELAY_MS, TimeUnit.MILLISECONDS);
+            assertSame(TEST_STRING, result);
+        } catch (ExecutionException success) {
+        } catch(Exception ex) {
+            unexpectedException();
+        } finally {
+            joinPool(e);
+        }
+    }
+
+    /**
+     * timed invokeAll(null) throws NPE
+     */
+    public void testTimedInvokeAll1() {
+        ExecutorService e = new ScheduledThreadPoolExecutor(2);
+        try {
+            e.invokeAll(null, MEDIUM_DELAY_MS, TimeUnit.MILLISECONDS);
+        } catch (NullPointerException success) {
+        } catch(Exception ex) {
+            unexpectedException();
+        } finally {
+            joinPool(e);
+        }
+    }
+
+    /**
+     * timed invokeAll(,,null) throws NPE
+     */
+    public void testTimedInvokeAllNullTimeUnit() {
+        ExecutorService e = new ScheduledThreadPoolExecutor(2);
+        try {
+            ArrayList<Callable<String>> l = new ArrayList<Callable<String>>();
+            l.add(new StringTask());
+            e.invokeAll(l, MEDIUM_DELAY_MS, null);
+        } catch (NullPointerException success) {
+        } catch(Exception ex) {
+            unexpectedException();
+        } finally {
+            joinPool(e);
+        }
+    }
+
+    /**
+     * timed invokeAll(empty collection) returns empty collection
+     */
+    public void testTimedInvokeAll2() {
+        ExecutorService e = new ScheduledThreadPoolExecutor(2);
+        try {
+            List<Future<String>> r = e.invokeAll(new ArrayList<Callable<String>>(), MEDIUM_DELAY_MS, TimeUnit.MILLISECONDS);
+            assertTrue(r.isEmpty());
+        } catch(Exception ex) {
+            unexpectedException();
+        } finally {
+            joinPool(e);
+        }
+    }
+
+    /**
+     * timed invokeAll(c) throws NPE if c has null elements
+     */
+    public void testTimedInvokeAll3() {
+        ExecutorService e = new ScheduledThreadPoolExecutor(2);
+        try {
+            ArrayList<Callable<String>> l = new ArrayList<Callable<String>>();
+            l.add(new StringTask());
+            l.add(null);
+            e.invokeAll(l, MEDIUM_DELAY_MS, TimeUnit.MILLISECONDS);
+        } catch (NullPointerException success) {
+        } catch(Exception ex) {
+            unexpectedException();
+        } finally {
+            joinPool(e);
+        }
+    }
+
+    /**
+     * get of element of invokeAll(c) throws exception on failed task
+     */
+    public void testTimedInvokeAll4() {
+        ExecutorService e = new ScheduledThreadPoolExecutor(2);
+        try {
+            ArrayList<Callable<String>> l = new ArrayList<Callable<String>>();
+            l.add(new NPETask());
+            List<Future<String>> result = e.invokeAll(l, MEDIUM_DELAY_MS, TimeUnit.MILLISECONDS);
+            assertEquals(1, result.size());
+            for (Iterator<Future<String>> it = result.iterator(); it.hasNext();) 
+                it.next().get();
+        } catch(ExecutionException success) {
+        } catch(Exception ex) {
+            unexpectedException();
+        } finally {
+            joinPool(e);
+        }
+    }
+
+    /**
+     * timed invokeAll(c) returns results of all completed tasks
+     */
+    public void testTimedInvokeAll5() {
+        ExecutorService e = new ScheduledThreadPoolExecutor(2);
+        try {
+            ArrayList<Callable<String>> l = new ArrayList<Callable<String>>();
+            l.add(new StringTask());
+            l.add(new StringTask());
+            List<Future<String>> result = e.invokeAll(l, MEDIUM_DELAY_MS, TimeUnit.MILLISECONDS);
+            assertEquals(2, result.size());
+            for (Iterator<Future<String>> it = result.iterator(); it.hasNext();) 
+                assertSame(TEST_STRING, it.next().get());
+        } catch (ExecutionException success) {
+        } catch(Exception ex) {
+            unexpectedException();
+        } finally {
+            joinPool(e);
+        }
+    }
+
+    /**
+     * timed invokeAll(c) cancels tasks not completed by timeout
+     */
+    public void testTimedInvokeAll6() {
+        ExecutorService e = new ScheduledThreadPoolExecutor(2);
+        try {
+            ArrayList<Callable<String>> l = new ArrayList<Callable<String>>();
+            l.add(new StringTask());
+            l.add(Executors.callable(new MediumPossiblyInterruptedRunnable(), TEST_STRING));
+            List<Future<String>> result = e.invokeAll(l, SHORT_DELAY_MS, TimeUnit.MILLISECONDS);
+            assertEquals(2, result.size());
+            Iterator<Future<String>> it = result.iterator(); 
+            Future<String> f1 = it.next();
+            Future<String> f2 = it.next();
+            assertTrue(f1.isDone());
+            assertFalse(f1.isCancelled());
+            assertTrue(f2.isDone());
+            assertTrue(f2.isCancelled());
+        } catch(Exception ex) {
+            unexpectedException();
+        } finally {
+            joinPool(e);
+        }
+    }
+
+
 }