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 JSR166TestCase {
    public static void main(String[] args) {
        junit.textui.TestRunner.run (suite());  
    }
    public static Test suite() {
        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();
        }
        
    }


    /**
     * 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();
        }
    }

    /**
     *  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();
        }
    }
    
    /**
     * 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();
        }
    }

    /**
     * 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();
        }
    }
    
    /**
     *  execute (null) throws NPE
     */
    public void testExecuteNull() {
        ScheduledExecutor se = null;
        try {
            se = new ScheduledExecutor(1);
            se.execute(null);
            shouldThrow();
        } catch(NullPointerException success){}
        catch(Exception e){
            unexpectedException();
        }
        
        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);
    }
   
    /**
     * execute throws RejectedExecutionException if shutdown
     */
    public void testSchedule1_RejectedExecutionException() {
        ScheduledExecutor se = new ScheduledExecutor(1);
        try {
            se.shutdown();
            se.schedule(new NoOpRunnable(),
                        MEDIUM_DELAY_MS, TimeUnit.MILLISECONDS);
            shouldThrow();
        } catch(RejectedExecutionException success){
        }
        joinPool(se);

    }

    /**
     * schedule throws RejectedExecutionException if shutdown
     */
    public void testSchedule2_RejectedExecutionException() {
        ScheduledExecutor se = new ScheduledExecutor(1);
        try {
            se.shutdown();
            se.schedule(new NoOpCallable(),
                        MEDIUM_DELAY_MS, TimeUnit.MILLISECONDS);
            shouldThrow();
        } catch(RejectedExecutionException success){
        }
        joinPool(se);
    }

    /**
     * schedule callable throws RejectedExecutionException if shutdown
     */
     public void testSchedule3_RejectedExecutionException() {
         ScheduledExecutor se = new ScheduledExecutor(1);
         try {
            se.shutdown();
            se.schedule(new NoOpCallable(),
                        MEDIUM_DELAY_MS, TimeUnit.MILLISECONDS);
            shouldThrow();
        } catch(RejectedExecutionException success){
        } 
         joinPool(se);
    }

    /**
     *  scheduleAtFixedRate throws RejectedExecutionException if shutdown
     */
    public void testScheduleAtFixedRate1_RejectedExecutionException() {
        ScheduledExecutor se = new ScheduledExecutor(1);
        try {
            se.shutdown();
            se.scheduleAtFixedRate(new NoOpRunnable(),
                                   MEDIUM_DELAY_MS, MEDIUM_DELAY_MS, TimeUnit.MILLISECONDS);
            shouldThrow();
        } catch(RejectedExecutionException success){
        } 
        joinPool(se);
    }
    
    /**
     * scheduleWithFixedDelay throws RejectedExecutionException if shutdown
     */
    public void testScheduleWithFixedDelay1_RejectedExecutionException() {
        ScheduledExecutor se = new ScheduledExecutor(1);
        try {
            se.shutdown();
            se.scheduleWithFixedDelay(new NoOpRunnable(),
                                      MEDIUM_DELAY_MS, MEDIUM_DELAY_MS, TimeUnit.MILLISECONDS);
            shouldThrow();
        } catch(RejectedExecutionException success){
        } 
        joinPool(se);
    }

    /**
     *  getActiveCount increases but doesn't overestimate, when a
     *  thread becomes active
     */
    public void testGetActiveCount() {
        ScheduledExecutor p2 = new ScheduledExecutor(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() {
        ScheduledExecutor p2 = new ScheduledExecutor(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() {
        ScheduledExecutor p1 = new ScheduledExecutor(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);
        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() {
        ScheduledExecutor p1 = new ScheduledExecutor(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);
        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);
    }
    
    /**
     *   is isShutDown is false before shutdown, true after
     */
    public void testIsShutdown() {
        
        ScheduledExecutor p1 = new ScheduledExecutor(1);
        try {
            assertFalse(p1.isShutdown());
        }
        finally {
            p1.shutdown();
        }
        assertTrue(p1.isShutdown());
    }

        
    /**
     *   isTerminated is false before termination, true after
     */
    public void testIsTerminated() {
        ScheduledExecutor p1 = new ScheduledExecutor(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() {
        ScheduledExecutor p1 = new ScheduledExecutor(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();
        }       
    }

    /**
     *   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);
    }

    /**
     *  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);
        joinPool(p1);
    }

    /**
     * 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();
        }
    }


    /**
     * 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();
        }
    }


    /**
     * 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();
        }
    }

    /**
     * if setContinueExistingPeriodicTasksAfterShutdownPolicy is true,
     * periodic tasks are cancelled at shutdown
     */
    public void testShutDown4() {
        ScheduledExecutor p1 = new ScheduledExecutor(1);
        try {
            p1.setContinueExistingPeriodicTasksAfterShutdownPolicy(true);
            ScheduledCancellable 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();
        }
    }

}
Revision:	1.6
Committed:	Thu Sep 25 11:02:41 2003 UTC (20 years, 7 months ago) by dl
Branch:	MAIN
Changes since 1.5:	+87 -85 lines
Log Message:	improve tck javadocs; rename and add a few 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 JSR166TestCase {
13	public static void main(String[] args) {
14	junit.textui.TestRunner.run (suite());
15	}
16	public static Test suite() {
17	return new TestSuite(ScheduledExecutorTest.class);
18	}
19
20	static class MyRunnable implements Runnable {
21	volatile boolean done = false;
22	public void run() {
23	try {
24	Thread.sleep(SMALL_DELAY_MS);
25	done = true;
26	} catch(Exception e){
27	}
28	}
29	}
30
31	static class MyCallable implements Callable {
32	volatile boolean done = false;
33	public Object call() {
34	try {
35	Thread.sleep(SMALL_DELAY_MS);
36	done = true;
37	} catch(Exception e){
38	}
39	return Boolean.TRUE;
40	}
41	}
42
43	/**
44	* execute successfully executes a runnable
45	*/
46	public void testExecute() {
47	try {
48	MyRunnable runnable =new MyRunnable();
49	ScheduledExecutor p1 = new ScheduledExecutor(1);
50	p1.execute(runnable);
51	assertFalse(runnable.done);
52	Thread.sleep(SHORT_DELAY_MS);
53	p1.shutdown();
54	try {
55	Thread.sleep(MEDIUM_DELAY_MS);
56	} catch(InterruptedException e){
57	unexpectedException();
58	}
59	assertTrue(runnable.done);
60	p1.shutdown();
61	joinPool(p1);
62	}
63	catch(Exception e){
64	unexpectedException();
65	}
66
67	}
68
69
70	/**
71	* delayed schedule of callable successfully executes after delay
72	*/
73	public void testSchedule1() {
74	try {
75	MyCallable callable = new MyCallable();
76	ScheduledExecutor p1 = new ScheduledExecutor(1);
77	Future f = p1.schedule(callable, SHORT_DELAY_MS, TimeUnit.MILLISECONDS);
78	assertFalse(callable.done);
79	Thread.sleep(MEDIUM_DELAY_MS);
80	assertTrue(callable.done);
81	assertEquals(Boolean.TRUE, f.get());
82	p1.shutdown();
83	joinPool(p1);
84	} catch(RejectedExecutionException e){}
85	catch(Exception e){
86	unexpectedException();
87	}
88	}
89
90	/**
91	* delayed schedule of runnable successfully executes after delay
92	*/
93	public void testSchedule3() {
94	try {
95	MyRunnable runnable = new MyRunnable();
96	ScheduledExecutor p1 = new ScheduledExecutor(1);
97	p1.schedule(runnable, SMALL_DELAY_MS, TimeUnit.MILLISECONDS);
98	Thread.sleep(SHORT_DELAY_MS);
99	assertFalse(runnable.done);
100	Thread.sleep(MEDIUM_DELAY_MS);
101	assertTrue(runnable.done);
102	p1.shutdown();
103	joinPool(p1);
104	} catch(Exception e){
105	unexpectedException();
106	}
107	}
108
109	/**
110	* scheduleAtFixedRate executes runnable after given initial delay
111	*/
112	public void testSchedule4() {
113	try {
114	MyRunnable runnable = new MyRunnable();
115	ScheduledExecutor p1 = new ScheduledExecutor(1);
116	ScheduledCancellable h = p1.scheduleAtFixedRate(runnable, SHORT_DELAY_MS, SHORT_DELAY_MS, TimeUnit.MILLISECONDS);
117	assertFalse(runnable.done);
118	Thread.sleep(MEDIUM_DELAY_MS);
119	assertTrue(runnable.done);
120	h.cancel(true);
121	p1.shutdown();
122	joinPool(p1);
123	} catch(Exception e){
124	unexpectedException();
125	}
126	}
127
128	/**
129	* scheduleWithFixedDelay executes runnable after given initial delay
130	*/
131	public void testSchedule5() {
132	try {
133	MyRunnable runnable = new MyRunnable();
134	ScheduledExecutor p1 = new ScheduledExecutor(1);
135	ScheduledCancellable h = p1.scheduleWithFixedDelay(runnable, SHORT_DELAY_MS, SHORT_DELAY_MS, TimeUnit.MILLISECONDS);
136	assertFalse(runnable.done);
137	Thread.sleep(MEDIUM_DELAY_MS);
138	assertTrue(runnable.done);
139	h.cancel(true);
140	p1.shutdown();
141	joinPool(p1);
142	} catch(Exception e){
143	unexpectedException();
144	}
145	}
146
147	/**
148	* execute (null) throws NPE
149	*/
150	public void testExecuteNull() {
151	ScheduledExecutor se = null;
152	try {
153	se = new ScheduledExecutor(1);
154	se.execute(null);
155	shouldThrow();
156	} catch(NullPointerException success){}
157	catch(Exception e){
158	unexpectedException();
159	}
160
161	joinPool(se);
162	}
163
164	/**
165	* schedule (null) throws NPE
166	*/
167	public void testScheduleNull() {
168	ScheduledExecutor se = new ScheduledExecutor(1);
169	try {
170	MyCallable callable = null;
171	Future f = se.schedule(callable, SHORT_DELAY_MS, TimeUnit.MILLISECONDS);
172	shouldThrow();
173	} catch(NullPointerException success){}
174	catch(Exception e){
175	unexpectedException();
176	}
177	joinPool(se);
178	}
179
180	/**
181	* execute throws RejectedExecutionException if shutdown
182	*/
183	public void testSchedule1_RejectedExecutionException() {
184	ScheduledExecutor se = new ScheduledExecutor(1);
185	try {
186	se.shutdown();
187	se.schedule(new NoOpRunnable(),
188	MEDIUM_DELAY_MS, TimeUnit.MILLISECONDS);
189	shouldThrow();
190	} catch(RejectedExecutionException success){
191	}
192	joinPool(se);
193
194	}
195
196	/**
197	* schedule throws RejectedExecutionException if shutdown
198	*/
199	public void testSchedule2_RejectedExecutionException() {
200	ScheduledExecutor se = new ScheduledExecutor(1);
201	try {
202	se.shutdown();
203	se.schedule(new NoOpCallable(),
204	MEDIUM_DELAY_MS, TimeUnit.MILLISECONDS);
205	shouldThrow();
206	} catch(RejectedExecutionException success){
207	}
208	joinPool(se);
209	}
210
211	/**
212	* schedule callable throws RejectedExecutionException if shutdown
213	*/
214	public void testSchedule3_RejectedExecutionException() {
215	ScheduledExecutor se = new ScheduledExecutor(1);
216	try {
217	se.shutdown();
218	se.schedule(new NoOpCallable(),
219	MEDIUM_DELAY_MS, TimeUnit.MILLISECONDS);
220	shouldThrow();
221	} catch(RejectedExecutionException success){
222	}
223	joinPool(se);
224	}
225
226	/**
227	* scheduleAtFixedRate throws RejectedExecutionException if shutdown
228	*/
229	public void testScheduleAtFixedRate1_RejectedExecutionException() {
230	ScheduledExecutor se = new ScheduledExecutor(1);
231	try {
232	se.shutdown();
233	se.scheduleAtFixedRate(new NoOpRunnable(),
234	MEDIUM_DELAY_MS, MEDIUM_DELAY_MS, TimeUnit.MILLISECONDS);
235	shouldThrow();
236	} catch(RejectedExecutionException success){
237	}
238	joinPool(se);
239	}
240
241	/**
242	* scheduleWithFixedDelay throws RejectedExecutionException if shutdown
243	*/
244	public void testScheduleWithFixedDelay1_RejectedExecutionException() {
245	ScheduledExecutor se = new ScheduledExecutor(1);
246	try {
247	se.shutdown();
248	se.scheduleWithFixedDelay(new NoOpRunnable(),
249	MEDIUM_DELAY_MS, MEDIUM_DELAY_MS, TimeUnit.MILLISECONDS);
250	shouldThrow();
251	} catch(RejectedExecutionException success){
252	}
253	joinPool(se);
254	}
255
256	/**
257	* getActiveCount increases but doesn't overestimate, when a
258	* thread becomes active
259	*/
260	public void testGetActiveCount() {
261	ScheduledExecutor p2 = new ScheduledExecutor(2);
262	assertEquals(0, p2.getActiveCount());
263	p2.execute(new SmallRunnable());
264	try {
265	Thread.sleep(SHORT_DELAY_MS);
266	} catch(Exception e){
267	unexpectedException();
268	}
269	assertEquals(1, p2.getActiveCount());
270	joinPool(p2);
271	}
272
273	/**
274	* getCompletedTaskCount increases, but doesn't overestimate,
275	* when tasks complete
276	*/
277	public void testGetCompletedTaskCount() {
278	ScheduledExecutor p2 = new ScheduledExecutor(2);
279	assertEquals(0, p2.getCompletedTaskCount());
280	p2.execute(new SmallRunnable());
281	try {
282	Thread.sleep(MEDIUM_DELAY_MS);
283	} catch(Exception e){
284	unexpectedException();
285	}
286	assertEquals(1, p2.getCompletedTaskCount());
287	joinPool(p2);
288	}
289
290	/**
291	* getCorePoolSize returns size given in constructor if not otherwise set
292	*/
293	public void testGetCorePoolSize() {
294	ScheduledExecutor p1 = new ScheduledExecutor(1);
295	assertEquals(1, p1.getCorePoolSize());
296	joinPool(p1);
297	}
298
299	/**
300	* getLargestPoolSize increases, but doesn't overestimate, when
301	* multiple threads active
302	*/
303	public void testGetLargestPoolSize() {
304	ScheduledExecutor p2 = new ScheduledExecutor(2);
305	assertEquals(0, p2.getLargestPoolSize());
306	p2.execute(new SmallRunnable());
307	p2.execute(new SmallRunnable());
308	try {
309	Thread.sleep(SHORT_DELAY_MS);
310	} catch(Exception e){
311	unexpectedException();
312	}
313	assertEquals(2, p2.getLargestPoolSize());
314	joinPool(p2);
315	}
316
317	/**
318	* getPoolSize increases, but doesn't overestimate, when threads
319	* become active
320	*/
321	public void testGetPoolSize() {
322	ScheduledExecutor p1 = new ScheduledExecutor(1);
323	assertEquals(0, p1.getPoolSize());
324	p1.execute(new SmallRunnable());
325	assertEquals(1, p1.getPoolSize());
326	joinPool(p1);
327	}
328
329	/**
330	* getTaskCount increases, but doesn't overestimate, when tasks
331	* submitted
332	*/
333	public void testGetTaskCount() {
334	ScheduledExecutor p1 = new ScheduledExecutor(1);
335	assertEquals(0, p1.getTaskCount());
336	for(int i = 0; i < 5; i++)
337	p1.execute(new SmallRunnable());
338	try {
339	Thread.sleep(SHORT_DELAY_MS);
340	} catch(Exception e){
341	unexpectedException();
342	}
343	assertEquals(5, p1.getTaskCount());
344	joinPool(p1);
345	}
346
347	/**
348	* is isShutDown is false before shutdown, true after
349	*/
350	public void testIsShutdown() {
351
352	ScheduledExecutor p1 = new ScheduledExecutor(1);
353	try {
354	assertFalse(p1.isShutdown());
355	}
356	finally {
357	p1.shutdown();
358	}
359	assertTrue(p1.isShutdown());
360	}
361
362
363	/**
364	* isTerminated is false before termination, true after
365	*/
366	public void testIsTerminated() {
367	ScheduledExecutor p1 = new ScheduledExecutor(1);
368	try {
369	p1.execute(new SmallRunnable());
370	} finally {
371	p1.shutdown();
372	}
373	try {
374	assertTrue(p1.awaitTermination(LONG_DELAY_MS, TimeUnit.MILLISECONDS));
375	assertTrue(p1.isTerminated());
376	} catch(Exception e){
377	unexpectedException();
378	}
379	}
380
381	/**
382	* isTerminating is not true when running or when terminated
383	*/
384	public void testIsTerminating() {
385	ScheduledExecutor p1 = new ScheduledExecutor(1);
386	assertFalse(p1.isTerminating());
387	try {
388	p1.execute(new SmallRunnable());
389	assertFalse(p1.isTerminating());
390	} finally {
391	p1.shutdown();
392	}
393	try {
394	assertTrue(p1.awaitTermination(LONG_DELAY_MS, TimeUnit.MILLISECONDS));
395	assertTrue(p1.isTerminated());
396	assertFalse(p1.isTerminating());
397	} catch(Exception e){
398	unexpectedException();
399	}
400	}
401
402	/**
403	* purge removes cancelled tasks from the queue
404	*/
405	public void testPurge() {
406	ScheduledExecutor p1 = new ScheduledExecutor(1);
407	ScheduledCancellable[] tasks = new ScheduledCancellable[5];
408	for(int i = 0; i < 5; i++){
409	tasks[i] = p1.schedule(new SmallRunnable(), 1, TimeUnit.MILLISECONDS);
410	}
411	int max = 5;
412	if (tasks[4].cancel(true)) --max;
413	if (tasks[3].cancel(true)) --max;
414	p1.purge();
415	long count = p1.getTaskCount();
416	assertTrue(count > 0 && count <= max);
417	joinPool(p1);
418	}
419
420	/**
421	* shutDownNow returns a list containing tasks that were not run
422	*/
423	public void testShutDownNow() {
424	ScheduledExecutor p1 = new ScheduledExecutor(1);
425	for(int i = 0; i < 5; i++)
426	p1.schedule(new SmallRunnable(), SHORT_DELAY_MS, TimeUnit.MILLISECONDS);
427	List l = p1.shutdownNow();
428	assertTrue(p1.isShutdown());
429	assertTrue(l.size() > 0 && l.size() <= 5);
430	joinPool(p1);
431	}
432
433	/**
434	* In default setting, shutdown cancels periodic but not delayed
435	* tasks at shutdown
436	*/
437	public void testShutDown1() {
438	try {
439	ScheduledExecutor p1 = new ScheduledExecutor(1);
440	assertTrue(p1.getExecuteExistingDelayedTasksAfterShutdownPolicy());
441	assertFalse(p1.getContinueExistingPeriodicTasksAfterShutdownPolicy());
442
443	ScheduledCancellable[] tasks = new ScheduledCancellable[5];
444	for(int i = 0; i < 5; i++)
445	tasks[i] = p1.schedule(new NoOpRunnable(), SHORT_DELAY_MS, TimeUnit.MILLISECONDS);
446	p1.shutdown();
447	BlockingQueue q = p1.getQueue();
448	for (Iterator it = q.iterator(); it.hasNext();) {
449	ScheduledCancellable t = (ScheduledCancellable)it.next();
450	assertFalse(t.isCancelled());
451	}
452	assertTrue(p1.isShutdown());
453	Thread.sleep(SMALL_DELAY_MS);
454	for (int i = 0; i < 5; ++i) {
455	assertTrue(tasks[i].isDone());
456	assertFalse(tasks[i].isCancelled());
457	}
458
459	}
460	catch(Exception ex) {
461	unexpectedException();
462	}
463	}
464
465
466	/**
467	* If setExecuteExistingDelayedTasksAfterShutdownPolicy is false,
468	* delayed tasks are cancelled at shutdown
469	*/
470	public void testShutDown2() {
471	try {
472	ScheduledExecutor p1 = new ScheduledExecutor(1);
473	p1.setExecuteExistingDelayedTasksAfterShutdownPolicy(false);
474	ScheduledCancellable[] tasks = new ScheduledCancellable[5];
475	for(int i = 0; i < 5; i++)
476	tasks[i] = p1.schedule(new NoOpRunnable(), SHORT_DELAY_MS, TimeUnit.MILLISECONDS);
477	p1.shutdown();
478	assertTrue(p1.isShutdown());
479	BlockingQueue q = p1.getQueue();
480	assertTrue(q.isEmpty());
481	Thread.sleep(SMALL_DELAY_MS);
482	assertTrue(p1.isTerminated());
483	}
484	catch(Exception ex) {
485	unexpectedException();
486	}
487	}
488
489
490	/**
491	* If setContinueExistingPeriodicTasksAfterShutdownPolicy is set false,
492	* periodic tasks are not cancelled at shutdown
493	*/
494	public void testShutDown3() {
495	try {
496	ScheduledExecutor p1 = new ScheduledExecutor(1);
497	p1.setContinueExistingPeriodicTasksAfterShutdownPolicy(false);
498	ScheduledCancellable task =
499	p1.scheduleAtFixedRate(new NoOpRunnable(), 5, 5, TimeUnit.MILLISECONDS);
500	p1.shutdown();
501	assertTrue(p1.isShutdown());
502	BlockingQueue q = p1.getQueue();
503	assertTrue(q.isEmpty());
504	Thread.sleep(SHORT_DELAY_MS);
505	assertTrue(p1.isTerminated());
506	}
507	catch(Exception ex) {
508	unexpectedException();
509	}
510	}
511
512	/**
513	* if setContinueExistingPeriodicTasksAfterShutdownPolicy is true,
514	* periodic tasks are cancelled at shutdown
515	*/
516	public void testShutDown4() {
517	ScheduledExecutor p1 = new ScheduledExecutor(1);
518	try {
519	p1.setContinueExistingPeriodicTasksAfterShutdownPolicy(true);
520	ScheduledCancellable task =
521	p1.scheduleAtFixedRate(new NoOpRunnable(), 5, 5, TimeUnit.MILLISECONDS);
522	assertFalse(task.isCancelled());
523	p1.shutdown();
524	assertFalse(task.isCancelled());
525	assertFalse(p1.isTerminated());
526	assertTrue(p1.isShutdown());
527	Thread.sleep(SHORT_DELAY_MS);
528	assertFalse(task.isCancelled());
529	task.cancel(true);
530	assertTrue(task.isCancelled());
531	Thread.sleep(SHORT_DELAY_MS);
532	assertTrue(p1.isTerminated());
533	}
534	catch(Exception ex) {
535	unexpectedException();
536	}
537	finally {
538	p1.shutdownNow();
539	}
540	}
541
542	}