test/tck/ScheduledExecutorTest.java

/*
 * 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.
 */

import junit.framework.*;
import java.util.*;
import java.util.concurrent.*;

public class ScheduledExecutorTest extends TestCase{
    
    boolean flag = false;

    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(SHORT_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(SHORT_DELAY_MS);
                waiting = false;
                done = true;
            }catch(Exception e){}
            return Boolean.TRUE;
        }
    }

    public Runnable newRunnable(){
        return new Runnable(){
                public void run(){
                    try{Thread.sleep(SHORT_DELAY_MS);
                    } catch(Exception e){
                    }
                }
            };
    }

    public Runnable newNoopRunnable() {
        return new Runnable(){
                public void run(){
                }
            };
    }

    /**
     *  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(SHORT_DELAY_MS/2);
            assertTrue(runnable.waiting);
            one.shutdown();
            try{
                Thread.sleep(MEDIUM_DELAY_MS);
            } catch(InterruptedException e){
                fail("unexpected exception");
            }
            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, SHORT_DELAY_MS, TimeUnit.MILLISECONDS);
            assertTrue(callable.waiting);
            Thread.sleep(MEDIUM_DELAY_MS);
            assertTrue(callable.done);
            assertEquals(Boolean.TRUE, f.get());
            one.shutdown();
        }catch(RejectedExecutionException e){}
        catch(Exception e){
            fail("unexpected exception");
        }
    }

    /**
     *  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, SHORT_DELAY_MS, TimeUnit.MILLISECONDS);
            Thread.sleep(SHORT_DELAY_MS/2);
            assertTrue(runnable.waiting);
            Thread.sleep(MEDIUM_DELAY_MS);
            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, SHORT_DELAY_MS, TimeUnit.MILLISECONDS);
            //      Thread.sleep(505);
            assertTrue(runnable.waiting);
            Thread.sleep(MEDIUM_DELAY_MS);
            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){}    
    }

    /**
     *  Test to verify schedule(Callable, long, TimeUnit) throws RejectedExecutionException
     *  This occurs on an attempt to schedule a task on a shutdown executor
     */
    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){}    
    }

    /**
     *  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){}    
    }

    /**
     *  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);
            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.shutdown();
            se.scheduleAtFixedRate(new Runnable(){
                    public void run(){}
                },  1, 100, TimeUnit.SECONDS);
            fail("should throw");
        }catch(RejectedExecutionException e){}    
    }

    /**
     *  Test to verify scheduleWithFixedDelay(Runnable, long, long, TimeUnit) throws 
     *  RejectedExecutionException.
     *  This occurs on an attempt to schedule a task on a shutdown executor
     */
    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){}    
    }

    /**
     *  Test to verify scheduleWithFixedDelay(Runnable, long, long, TimeUnit) throws 
     *  RejectedExecutionException.
     *  This occurs on an attempt to schedule a task on a shutdown executor
     */
     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){}    
    }

    /**
     *  Test to verify execute throws RejectedExecutionException
     *  This occurs on an attempt to schedule a task on a shutdown executor
     */
    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){}    
    }


    /**
     *  Test to verify getActiveCount gives correct values
     */
    public void testGetActiveCount(){
        ScheduledExecutor two = new ScheduledExecutor(2);
        try {
            assertEquals(0, two.getActiveCount());
            two.execute(newRunnable());
            try{
                Thread.sleep(SHORT_DELAY_MS/2);
            } catch(Exception e){
                fail("unexpected exception");
            }
            assertEquals(1, two.getActiveCount());
        } finally {
            two.shutdown();
        }
    }
    
    /**
     *  Test to verify getCompleteTaskCount gives correct values
     */
    public void testGetCompletedTaskCount(){
        ScheduledExecutor two = new ScheduledExecutor(2);
        try {
            assertEquals(0, two.getCompletedTaskCount());
            two.execute(newRunnable());
            try{
                Thread.sleep(MEDIUM_DELAY_MS);
            } catch(Exception e){
                fail("unexpected exception");
            }
            assertEquals(1, two.getCompletedTaskCount());
        } finally {
            two.shutdown();
        }
    }
    
    /**
     *  Test to verify getCorePoolSize gives correct values
     */
    public void testGetCorePoolSize(){
        ScheduledExecutor one = new ScheduledExecutor(1);
        try {
            assertEquals(1, one.getCorePoolSize());
        } finally {
            one.shutdown();
        }
    }
    
    /**
     *  Test to verify getLargestPoolSize gives correct values
     */
    public void testGetLargestPoolSize(){
        ScheduledExecutor two = new ScheduledExecutor(2);
        try {
            assertEquals(0, two.getLargestPoolSize());
            two.execute(newRunnable());
            two.execute(newRunnable());
            try{
                Thread.sleep(SHORT_DELAY_MS);
            } catch(Exception e){
                fail("unexpected exception");
            }
            assertEquals(2, two.getLargestPoolSize());
        } finally {
            two.shutdown();
        }
    }
    
    /**
     *  Test to verify getPoolSize gives correct values
     */
    public void testGetPoolSize(){
        ScheduledExecutor one = new ScheduledExecutor(1);
        try { 
            assertEquals(0, one.getPoolSize());
            one.execute(newRunnable());
            assertEquals(1, one.getPoolSize());
        } finally {
            one.shutdown();
        }
    }
    
    /**
     *  Test to verify getTaskCount gives correct values
     */
    public void testGetTaskCount(){
        ScheduledExecutor one = new ScheduledExecutor(1);
        try {
            assertEquals(0, one.getTaskCount());
            for(int i = 0; i < 5; i++)
                one.execute(newRunnable());
            try{
                Thread.sleep(SHORT_DELAY_MS);
            } catch(Exception e){
                fail("unexpected exception");
            }
            assertEquals(5, one.getTaskCount());
        } finally {
            one.shutdown();
        }
    }
    
    /**
     *  Test to verify isShutDown gives correct values
     */
    public void testIsShutdown(){
        
        ScheduledExecutor one = new ScheduledExecutor(1);
        try {
            assertFalse(one.isShutdown());
        }
        finally {
            one.shutdown();
        }
        assertTrue(one.isShutdown());
    }

        
    /**
     *  Test to verify isTerminated gives correct values
     *  Makes sure termination does not take an innapropriate
     *  amount of time
     */
    public void testIsTerminated(){
        ScheduledExecutor one = new ScheduledExecutor(1);
        try {
            one.execute(newRunnable());
        } finally {
            one.shutdown();
        }
        boolean flag = false;
        try{
            flag = one.awaitTermination(10, TimeUnit.SECONDS);
        } catch(Exception e){
            fail("unexpected exception");
        }       
        assertTrue(one.isTerminated());
        if(!flag)
            fail("ThreadPoolExecutor - thread pool did not terminate within suitable timeframe");
    }

    /**
     *  Test to verify that purge correctly removes cancelled tasks
     *  from the queue
     */
    public void testPurge(){
        ScheduledExecutor one = new ScheduledExecutor(1);
        try {
            ScheduledCancellable[] tasks = new ScheduledCancellable[5];
            for(int i = 0; i < 5; i++){
                tasks[i] = one.schedule(newRunnable(), 1, TimeUnit.MILLISECONDS);
            }
            int max = 5;
            if (tasks[4].cancel(true)) --max;
            if (tasks[3].cancel(true)) --max;
            one.purge();
            long count = one.getTaskCount();
            assertTrue(count > 0 && count <= max);
        } finally {
            one.shutdown();
        }
    }

    /**
     *  Test to verify shutDownNow returns a list
     *  containing the correct number of elements
     */
    public void testShutDownNow(){
        ScheduledExecutor one = new ScheduledExecutor(1);
        for(int i = 0; i < 5; i++)
            one.schedule(newRunnable(), SHORT_DELAY_MS, TimeUnit.MILLISECONDS);
        List l = one.shutdownNow();
        assertTrue(one.isShutdown());
        assertTrue(l.size() > 0 && l.size() <= 5);
    }

    public void testShutDown1(){
        try {
            ScheduledExecutor one = new ScheduledExecutor(1);
            assertTrue(one.getExecuteExistingDelayedTasksAfterShutdownPolicy());
            assertFalse(one.getContinueExistingPeriodicTasksAfterShutdownPolicy());

            ScheduledCancellable[] tasks = new ScheduledCancellable[5];
            for(int i = 0; i < 5; i++)
                tasks[i] = one.schedule(newNoopRunnable(), SHORT_DELAY_MS/2, TimeUnit.MILLISECONDS);
            one.shutdown();
            BlockingQueue q = one.getQueue();
            for (Iterator it = q.iterator(); it.hasNext();) {
                ScheduledCancellable t = (ScheduledCancellable)it.next();
                assertFalse(t.isCancelled());
            }
            assertTrue(one.isShutdown());
            Thread.sleep(SHORT_DELAY_MS);
            for (int i = 0; i < 5; ++i) {
                assertTrue(tasks[i].isDone());
                assertFalse(tasks[i].isCancelled());
            }
            
        }
        catch(Exception ex) {
            fail("unexpected exception");
        }
    }


    public void testShutDown2(){
        try {
            ScheduledExecutor one = new ScheduledExecutor(1);
            one.setExecuteExistingDelayedTasksAfterShutdownPolicy(false);
            ScheduledCancellable[] tasks = new ScheduledCancellable[5];
            for(int i = 0; i < 5; i++)
                tasks[i] = one.schedule(newNoopRunnable(), SHORT_DELAY_MS/2, TimeUnit.MILLISECONDS);
            one.shutdown();
            assertTrue(one.isShutdown());
            BlockingQueue q = one.getQueue();
            assertTrue(q.isEmpty());
            Thread.sleep(SHORT_DELAY_MS);
            assertTrue(one.isTerminated());
        }
        catch(Exception ex) {
            fail("unexpected exception");
        }
    }


    public void testShutDown3(){
        try {
            ScheduledExecutor one = new ScheduledExecutor(1);
            one.setContinueExistingPeriodicTasksAfterShutdownPolicy(false);
            ScheduledCancellable task =
                one.scheduleAtFixedRate(newNoopRunnable(), 5, 5, TimeUnit.MILLISECONDS);
            one.shutdown();
            assertTrue(one.isShutdown());
            BlockingQueue q = one.getQueue();
            assertTrue(q.isEmpty());
            Thread.sleep(SHORT_DELAY_MS);
            assertTrue(one.isTerminated());
        }
        catch(Exception ex) {
            fail("unexpected exception");
        }
    }

    public void testShutDown4(){
        ScheduledExecutor one = new ScheduledExecutor(1);
        try {
            one.setContinueExistingPeriodicTasksAfterShutdownPolicy(true);
            ScheduledCancellable task =
                one.scheduleAtFixedRate(newNoopRunnable(), 5, 5, TimeUnit.MILLISECONDS);
            assertFalse(task.isCancelled());
            one.shutdown();
            assertFalse(task.isCancelled());
            assertFalse(one.isTerminated());
            assertTrue(one.isShutdown());
            Thread.sleep(SHORT_DELAY_MS);
            assertFalse(task.isCancelled());
            task.cancel(true);
            assertTrue(task.isCancelled());
            Thread.sleep(SHORT_DELAY_MS);
            assertTrue(one.isTerminated());
        }
        catch(Exception ex) {
            fail("unexpected exception");
        }
        finally {
            one.shutdownNow();
        }
    }

}
Revision:	1.2
Committed:	Sun Sep 7 23:50:09 2003 UTC (20 years, 7 months ago) by dl
Branch:	MAIN
Changes since 1.1:	+310 -15 lines
Log Message:	Added shutdown tests
#	Content
1	/*
2	* Written by members of JCP JSR-166 Expert Group and released to the
3	* public domain. Use, modify, and redistribute this code in any way
4	* without acknowledgement. Other contributors include Andrew Wright,
5	* Jeffrey Hayes, Pat Fischer, Mike Judd.
6	*/
7
8	import junit.framework.*;
9	import java.util.*;
10	import java.util.concurrent.*;
11
12	public class ScheduledExecutorTest extends TestCase{
13
14	boolean flag = false;
15
16	public static void main(String[] args) {
17	junit.textui.TestRunner.run (suite());
18	}
19
20
21	public static Test suite() {
22	return new TestSuite(ScheduledExecutorTest.class);
23	}
24
25	private static long SHORT_DELAY_MS = 100;
26	private static long MEDIUM_DELAY_MS = 1000;
27	private static long LONG_DELAY_MS = 10000;
28
29	static class MyRunnable implements Runnable {
30	volatile boolean waiting = true;
31	volatile boolean done = false;
32	public void run(){
33	try{
34	Thread.sleep(SHORT_DELAY_MS);
35	waiting = false;
36	done = true;
37	} catch(Exception e){
38	}
39	}
40	}
41
42	static class MyCallable implements Callable {
43	volatile boolean waiting = true;
44	volatile boolean done = false;
45	public Object call(){
46	try{
47	Thread.sleep(SHORT_DELAY_MS);
48	waiting = false;
49	done = true;
50	}catch(Exception e){}
51	return Boolean.TRUE;
52	}
53	}
54
55	public Runnable newRunnable(){
56	return new Runnable(){
57	public void run(){
58	try{Thread.sleep(SHORT_DELAY_MS);
59	} catch(Exception e){
60	}
61	}
62	};
63	}
64
65	public Runnable newNoopRunnable() {
66	return new Runnable(){
67	public void run(){
68	}
69	};
70	}
71
72	/**
73	* Test to verify execute successfully runs the given Runnable
74	*/
75	public void testExecute(){
76	try{
77	MyRunnable runnable =new MyRunnable();
78	ScheduledExecutor one = new ScheduledExecutor(1);
79	one.execute(runnable);
80	Thread.sleep(SHORT_DELAY_MS/2);
81	assertTrue(runnable.waiting);
82	one.shutdown();
83	try{
84	Thread.sleep(MEDIUM_DELAY_MS);
85	} catch(InterruptedException e){
86	fail("unexpected exception");
87	}
88	assertFalse(runnable.waiting);
89	assertTrue(runnable.done);
90	one.shutdown();
91	}
92	catch(Exception e){
93	fail("unexpected exception");
94	}
95	}
96
97	/**
98	* Test to verify schedule successfully runs the given Callable.
99	* The waiting flag shows that the Callable is not started until
100	* immediately.
101	*/
102	public void testSchedule1(){
103	try{
104	MyCallable callable = new MyCallable();
105	ScheduledExecutor one = new ScheduledExecutor(1);
106	Future f = one.schedule(callable, SHORT_DELAY_MS, TimeUnit.MILLISECONDS);
107	assertTrue(callable.waiting);
108	Thread.sleep(MEDIUM_DELAY_MS);
109	assertTrue(callable.done);
110	assertEquals(Boolean.TRUE, f.get());
111	one.shutdown();
112	}catch(RejectedExecutionException e){}
113	catch(Exception e){
114	fail("unexpected exception");
115	}
116	}
117
118	/**
119	* Another version of schedule, only using Runnable instead of Callable
120	*/
121	public void testSchedule3(){
122	try{
123	MyRunnable runnable = new MyRunnable();
124	ScheduledExecutor one = new ScheduledExecutor(1);
125	one.schedule(runnable, SHORT_DELAY_MS, TimeUnit.MILLISECONDS);
126	Thread.sleep(SHORT_DELAY_MS/2);
127	assertTrue(runnable.waiting);
128	Thread.sleep(MEDIUM_DELAY_MS);
129	assertTrue(runnable.done);
130	one.shutdown();
131	} catch(Exception e){
132	fail("unexpected exception");
133	}
134	}
135
136	/**
137	* The final version of schedule, using both long, TimeUnit and Runnable
138	*/
139	public void testSchedule4(){
140	try{
141	MyRunnable runnable = new MyRunnable();
142	ScheduledExecutor one = new ScheduledExecutor(1);
143	one.schedule(runnable, SHORT_DELAY_MS, TimeUnit.MILLISECONDS);
144	// Thread.sleep(505);
145	assertTrue(runnable.waiting);
146	Thread.sleep(MEDIUM_DELAY_MS);
147	assertTrue(runnable.done);
148	one.shutdown();
149	} catch(Exception e){
150	fail("unexpected exception");
151	}
152	}
153
154
155	// exception tests
156
157	/**
158	* Test to verify schedule(Runnable, long) throws RejectedExecutionException
159	* This occurs on an attempt to schedule a task on a shutdown executor
160	*/
161	public void testSchedule1_RejectedExecutionException(){
162	try{
163	ScheduledExecutor se = new ScheduledExecutor(1);
164	se.shutdown();
165	se.schedule(new Runnable(){
166	public void run(){}
167	}, 10000, TimeUnit.MILLISECONDS);
168	fail("shoud throw");
169	}catch(RejectedExecutionException e){}
170	}
171
172	/**
173	* Test to verify schedule(Callable, long, TimeUnit) throws RejectedExecutionException
174	* This occurs on an attempt to schedule a task on a shutdown executor
175	*/
176	public void testSchedule2_RejectedExecutionException(){
177	try{
178	ScheduledExecutor se = new ScheduledExecutor(1);
179	se.shutdown();
180	se.schedule(new Callable(){
181	public Object call(){
182	return Boolean.TRUE;
183	}
184	}, (long)100, TimeUnit.SECONDS);
185	fail("should throw");
186	}catch(RejectedExecutionException e){}
187	}
188
189	/**
190	* Test to verify schedule(Callable, long) throws RejectedExecutionException
191	* This occurs on an attempt to schedule a task on a shutdown executor
192	*/
193	public void testSchedule3_RejectedExecutionException(){
194	try{
195	ScheduledExecutor se = new ScheduledExecutor(1);
196	se.shutdown();
197	se.schedule(new Callable(){
198	public Object call(){
199	return Boolean.TRUE;
200	}
201	}, 10000, TimeUnit.MILLISECONDS);
202	fail("should throw");
203	}catch(RejectedExecutionException e){}
204	}
205
206	/**
207	* Test to verify scheduleAtFixedRate(Runnable, long, long, TimeUnit) throws
208	* RejectedExecutionException.
209	* This occurs on an attempt to schedule a task on a shutdown executor
210	*/
211	public void testScheduleAtFixedRate1_RejectedExecutionException(){
212	try{
213	ScheduledExecutor se = new ScheduledExecutor(1);
214	se.shutdown();
215	se.scheduleAtFixedRate(new Runnable(){
216	public void run(){}
217	}, 100, 100, TimeUnit.SECONDS);
218	fail("should throw");
219	}catch(RejectedExecutionException e){}
220	}
221
222	/**
223	* Test to verify scheduleAtFixedRate(Runnable, long, long, TimeUnit) throws
224	* RejectedExecutionException.
225	* This occurs on an attempt to schedule a task on a shutdown executor
226	*/
227	public void testScheduleAtFixedRate2_RejectedExecutionException(){
228	try{
229	ScheduledExecutor se = new ScheduledExecutor(1);
230	se.shutdown();
231	se.scheduleAtFixedRate(new Runnable(){
232	public void run(){}
233	}, 1, 100, TimeUnit.SECONDS);
234	fail("should throw");
235	}catch(RejectedExecutionException e){}
236	}
237
238	/**
239	* Test to verify scheduleWithFixedDelay(Runnable, long, long, TimeUnit) throws
240	* RejectedExecutionException.
241	* This occurs on an attempt to schedule a task on a shutdown executor
242	*/
243	public void testScheduleWithFixedDelay1_RejectedExecutionException(){
244	try{
245	ScheduledExecutor se = new ScheduledExecutor(1);
246	se.shutdown();
247	se.scheduleWithFixedDelay(new Runnable(){
248	public void run(){}
249	}, 100, 100, TimeUnit.SECONDS);
250	fail("should throw");
251	}catch(RejectedExecutionException e){}
252	}
253
254	/**
255	* Test to verify scheduleWithFixedDelay(Runnable, long, long, TimeUnit) throws
256	* RejectedExecutionException.
257	* This occurs on an attempt to schedule a task on a shutdown executor
258	*/
259	public void testScheduleWithFixedDelay2_RejectedExecutionException(){
260	try{
261	ScheduledExecutor se = new ScheduledExecutor(1);
262	se.shutdown();
263	se.scheduleWithFixedDelay(new Runnable(){
264	public void run(){}
265	}, 1, 100, TimeUnit.SECONDS);
266	fail("should throw");
267	}catch(RejectedExecutionException e){}
268	}
269
270	/**
271	* Test to verify execute throws RejectedExecutionException
272	* This occurs on an attempt to schedule a task on a shutdown executor
273	*/
274	public void testExecute_RejectedExecutionException(){
275	try{
276	ScheduledExecutor se = new ScheduledExecutor(1);
277	se.shutdown();
278	se.execute(new Runnable(){
279	public void run(){}
280	});
281	fail("should throw");
282	}catch(RejectedExecutionException e){}
283	}
284
285
286
287	/**
288	* Test to verify getActiveCount gives correct values
289	*/
290	public void testGetActiveCount(){
291	ScheduledExecutor two = new ScheduledExecutor(2);
292	try {
293	assertEquals(0, two.getActiveCount());
294	two.execute(newRunnable());
295	try{
296	Thread.sleep(SHORT_DELAY_MS/2);
297	} catch(Exception e){
298	fail("unexpected exception");
299	}
300	assertEquals(1, two.getActiveCount());
301	} finally {
302	two.shutdown();
303	}
304	}
305
306	/**
307	* Test to verify getCompleteTaskCount gives correct values
308	*/
309	public void testGetCompletedTaskCount(){
310	ScheduledExecutor two = new ScheduledExecutor(2);
311	try {
312	assertEquals(0, two.getCompletedTaskCount());
313	two.execute(newRunnable());
314	try{
315	Thread.sleep(MEDIUM_DELAY_MS);
316	} catch(Exception e){
317	fail("unexpected exception");
318	}
319	assertEquals(1, two.getCompletedTaskCount());
320	} finally {
321	two.shutdown();
322	}
323	}
324
325	/**
326	* Test to verify getCorePoolSize gives correct values
327	*/
328	public void testGetCorePoolSize(){
329	ScheduledExecutor one = new ScheduledExecutor(1);
330	try {
331	assertEquals(1, one.getCorePoolSize());
332	} finally {
333	one.shutdown();
334	}
335	}
336
337	/**
338	* Test to verify getLargestPoolSize gives correct values
339	*/
340	public void testGetLargestPoolSize(){
341	ScheduledExecutor two = new ScheduledExecutor(2);
342	try {
343	assertEquals(0, two.getLargestPoolSize());
344	two.execute(newRunnable());
345	two.execute(newRunnable());
346	try{
347	Thread.sleep(SHORT_DELAY_MS);
348	} catch(Exception e){
349	fail("unexpected exception");
350	}
351	assertEquals(2, two.getLargestPoolSize());
352	} finally {
353	two.shutdown();
354	}
355	}
356
357	/**
358	* Test to verify getPoolSize gives correct values
359	*/
360	public void testGetPoolSize(){
361	ScheduledExecutor one = new ScheduledExecutor(1);
362	try {
363	assertEquals(0, one.getPoolSize());
364	one.execute(newRunnable());
365	assertEquals(1, one.getPoolSize());
366	} finally {
367	one.shutdown();
368	}
369	}
370
371	/**
372	* Test to verify getTaskCount gives correct values
373	*/
374	public void testGetTaskCount(){
375	ScheduledExecutor one = new ScheduledExecutor(1);
376	try {
377	assertEquals(0, one.getTaskCount());
378	for(int i = 0; i < 5; i++)
379	one.execute(newRunnable());
380	try{
381	Thread.sleep(SHORT_DELAY_MS);
382	} catch(Exception e){
383	fail("unexpected exception");
384	}
385	assertEquals(5, one.getTaskCount());
386	} finally {
387	one.shutdown();
388	}
389	}
390
391	/**
392	* Test to verify isShutDown gives correct values
393	*/
394	public void testIsShutdown(){
395
396	ScheduledExecutor one = new ScheduledExecutor(1);
397	try {
398	assertFalse(one.isShutdown());
399	}
400	finally {
401	one.shutdown();
402	}
403	assertTrue(one.isShutdown());
404	}
405
406
407	/**
408	* Test to verify isTerminated gives correct values
409	* Makes sure termination does not take an innapropriate
410	* amount of time
411	*/
412	public void testIsTerminated(){
413	ScheduledExecutor one = new ScheduledExecutor(1);
414	try {
415	one.execute(newRunnable());
416	} finally {
417	one.shutdown();
418	}
419	boolean flag = false;
420	try{
421	flag = one.awaitTermination(10, TimeUnit.SECONDS);
422	} catch(Exception e){
423	fail("unexpected exception");
424	}
425	assertTrue(one.isTerminated());
426	if(!flag)
427	fail("ThreadPoolExecutor - thread pool did not terminate within suitable timeframe");
428	}
429
430	/**
431	* Test to verify that purge correctly removes cancelled tasks
432	* from the queue
433	*/
434	public void testPurge(){
435	ScheduledExecutor one = new ScheduledExecutor(1);
436	try {
437	ScheduledCancellable[] tasks = new ScheduledCancellable[5];
438	for(int i = 0; i < 5; i++){
439	tasks[i] = one.schedule(newRunnable(), 1, TimeUnit.MILLISECONDS);
440	}
441	int max = 5;
442	if (tasks[4].cancel(true)) --max;
443	if (tasks[3].cancel(true)) --max;
444	one.purge();
445	long count = one.getTaskCount();
446	assertTrue(count > 0 && count <= max);
447	} finally {
448	one.shutdown();
449	}
450	}
451
452	/**
453	* Test to verify shutDownNow returns a list
454	* containing the correct number of elements
455	*/
456	public void testShutDownNow(){
457	ScheduledExecutor one = new ScheduledExecutor(1);
458	for(int i = 0; i < 5; i++)
459	one.schedule(newRunnable(), SHORT_DELAY_MS, TimeUnit.MILLISECONDS);
460	List l = one.shutdownNow();
461	assertTrue(one.isShutdown());
462	assertTrue(l.size() > 0 && l.size() <= 5);
463	}
464
465	public void testShutDown1(){
466	try {
467	ScheduledExecutor one = new ScheduledExecutor(1);
468	assertTrue(one.getExecuteExistingDelayedTasksAfterShutdownPolicy());
469	assertFalse(one.getContinueExistingPeriodicTasksAfterShutdownPolicy());
470
471	ScheduledCancellable[] tasks = new ScheduledCancellable[5];
472	for(int i = 0; i < 5; i++)
473	tasks[i] = one.schedule(newNoopRunnable(), SHORT_DELAY_MS/2, TimeUnit.MILLISECONDS);
474	one.shutdown();
475	BlockingQueue q = one.getQueue();
476	for (Iterator it = q.iterator(); it.hasNext();) {
477	ScheduledCancellable t = (ScheduledCancellable)it.next();
478	assertFalse(t.isCancelled());
479	}
480	assertTrue(one.isShutdown());
481	Thread.sleep(SHORT_DELAY_MS);
482	for (int i = 0; i < 5; ++i) {
483	assertTrue(tasks[i].isDone());
484	assertFalse(tasks[i].isCancelled());
485	}
486
487	}
488	catch(Exception ex) {
489	fail("unexpected exception");
490	}
491	}
492
493
494	public void testShutDown2(){
495	try {
496	ScheduledExecutor one = new ScheduledExecutor(1);
497	one.setExecuteExistingDelayedTasksAfterShutdownPolicy(false);
498	ScheduledCancellable[] tasks = new ScheduledCancellable[5];
499	for(int i = 0; i < 5; i++)
500	tasks[i] = one.schedule(newNoopRunnable(), SHORT_DELAY_MS/2, TimeUnit.MILLISECONDS);
501	one.shutdown();
502	assertTrue(one.isShutdown());
503	BlockingQueue q = one.getQueue();
504	assertTrue(q.isEmpty());
505	Thread.sleep(SHORT_DELAY_MS);
506	assertTrue(one.isTerminated());
507	}
508	catch(Exception ex) {
509	fail("unexpected exception");
510	}
511	}
512
513
514	public void testShutDown3(){
515	try {
516	ScheduledExecutor one = new ScheduledExecutor(1);
517	one.setContinueExistingPeriodicTasksAfterShutdownPolicy(false);
518	ScheduledCancellable task =
519	one.scheduleAtFixedRate(newNoopRunnable(), 5, 5, TimeUnit.MILLISECONDS);
520	one.shutdown();
521	assertTrue(one.isShutdown());
522	BlockingQueue q = one.getQueue();
523	assertTrue(q.isEmpty());
524	Thread.sleep(SHORT_DELAY_MS);
525	assertTrue(one.isTerminated());
526	}
527	catch(Exception ex) {
528	fail("unexpected exception");
529	}
530	}
531
532	public void testShutDown4(){
533	ScheduledExecutor one = new ScheduledExecutor(1);
534	try {
535	one.setContinueExistingPeriodicTasksAfterShutdownPolicy(true);
536	ScheduledCancellable task =
537	one.scheduleAtFixedRate(newNoopRunnable(), 5, 5, TimeUnit.MILLISECONDS);
538	assertFalse(task.isCancelled());
539	one.shutdown();
540	assertFalse(task.isCancelled());
541	assertFalse(one.isTerminated());
542	assertTrue(one.isShutdown());
543	Thread.sleep(SHORT_DELAY_MS);
544	assertFalse(task.isCancelled());
545	task.cancel(true);
546	assertTrue(task.isCancelled());
547	Thread.sleep(SHORT_DELAY_MS);
548	assertTrue(one.isTerminated());
549	}
550	catch(Exception ex) {
551	fail("unexpected exception");
552	}
553	finally {
554	one.shutdownNow();
555	}
556	}
557
558	}