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);
    }


    /**
     * execute successfully executes a runnable
     */
    public void testExecute() {
        try {
            TrackedShortRunnable runnable =new TrackedShortRunnable();
            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 {
            TrackedCallable callable = new TrackedCallable();
            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 {
            TrackedShortRunnable runnable = new TrackedShortRunnable();
            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 {
            TrackedShortRunnable runnable = new TrackedShortRunnable();
            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 {
            TrackedShortRunnable runnable = new TrackedShortRunnable();
            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 {
            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() {
        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);
    }

    /** 
     * getThreadFactory returns factory in constructor if not set
     */
    public void testGetThreadFactory() {
        ThreadFactory tf = new SimpleThreadFactory();
        ScheduledExecutor p = new ScheduledExecutor(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();
        ScheduledExecutor p = new ScheduledExecutor(1);
        p.setThreadFactory(tf);
        assertSame(tf, p.getThreadFactory());
        p.shutdown();
        joinPool(p);
    }

    /** 
     * setThreadFactory(null) throws NPE
     */
    public void testSetThreadFactoryNull() {
        ScheduledExecutor p = new ScheduledExecutor(1);
        try {
            p.setThreadFactory(null);
            shouldThrow();
        } catch (NullPointerException success) {
        } finally {
            joinPool(p);
        }
    }
    
    /**
     *   is isShutDown is false before shutdown, true after
     */
    public void testIsShutdown() {
        
        ScheduledExecutor p1 = new ScheduledExecutor(1);
        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();
        }       
    }

    /**
     * getQueue returns the work queue, which contains queued tasks
     */
    public void testGetQueue() {
        ScheduledExecutor p1 = new ScheduledExecutor(1);
        ScheduledCancellable[] tasks = new ScheduledCancellable[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() {
        ScheduledExecutor p1 = new ScheduledExecutor(1);
        ScheduledCancellable[] tasks = new ScheduledCancellable[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() {
        ScheduledExecutor p1 = new ScheduledExecutor(1);
        ScheduledCancellable[] tasks = new ScheduledCancellable[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() {
        ScheduledExecutor p1 = new ScheduledExecutor(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 {
            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:	1.8
Committed:	Sun Oct 5 23:00:40 2003 UTC (20 years, 7 months ago) by dl
Branch:	MAIN
CVS Tags:	JSR166_NOV3_FREEZE
Changes since 1.7:	+95 -7 lines
Log Message:	Added tests and documentation
#	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
21	/**
22	* execute successfully executes a runnable
23	*/
24	public void testExecute() {
25	try {
26	TrackedShortRunnable runnable =new TrackedShortRunnable();
27	ScheduledExecutor p1 = new ScheduledExecutor(1);
28	p1.execute(runnable);
29	assertFalse(runnable.done);
30	Thread.sleep(SHORT_DELAY_MS);
31	p1.shutdown();
32	try {
33	Thread.sleep(MEDIUM_DELAY_MS);
34	} catch(InterruptedException e){
35	unexpectedException();
36	}
37	assertTrue(runnable.done);
38	p1.shutdown();
39	joinPool(p1);
40	}
41	catch(Exception e){
42	unexpectedException();
43	}
44
45	}
46
47
48	/**
49	* delayed schedule of callable successfully executes after delay
50	*/
51	public void testSchedule1() {
52	try {
53	TrackedCallable callable = new TrackedCallable();
54	ScheduledExecutor p1 = new ScheduledExecutor(1);
55	Future f = p1.schedule(callable, SHORT_DELAY_MS, TimeUnit.MILLISECONDS);
56	assertFalse(callable.done);
57	Thread.sleep(MEDIUM_DELAY_MS);
58	assertTrue(callable.done);
59	assertEquals(Boolean.TRUE, f.get());
60	p1.shutdown();
61	joinPool(p1);
62	} catch(RejectedExecutionException e){}
63	catch(Exception e){
64	unexpectedException();
65	}
66	}
67
68	/**
69	* delayed schedule of runnable successfully executes after delay
70	*/
71	public void testSchedule3() {
72	try {
73	TrackedShortRunnable runnable = new TrackedShortRunnable();
74	ScheduledExecutor p1 = new ScheduledExecutor(1);
75	p1.schedule(runnable, SMALL_DELAY_MS, TimeUnit.MILLISECONDS);
76	Thread.sleep(SHORT_DELAY_MS);
77	assertFalse(runnable.done);
78	Thread.sleep(MEDIUM_DELAY_MS);
79	assertTrue(runnable.done);
80	p1.shutdown();
81	joinPool(p1);
82	} catch(Exception e){
83	unexpectedException();
84	}
85	}
86
87	/**
88	* scheduleAtFixedRate executes runnable after given initial delay
89	*/
90	public void testSchedule4() {
91	try {
92	TrackedShortRunnable runnable = new TrackedShortRunnable();
93	ScheduledExecutor p1 = new ScheduledExecutor(1);
94	ScheduledCancellable h = p1.scheduleAtFixedRate(runnable, SHORT_DELAY_MS, SHORT_DELAY_MS, TimeUnit.MILLISECONDS);
95	assertFalse(runnable.done);
96	Thread.sleep(MEDIUM_DELAY_MS);
97	assertTrue(runnable.done);
98	h.cancel(true);
99	p1.shutdown();
100	joinPool(p1);
101	} catch(Exception e){
102	unexpectedException();
103	}
104	}
105
106	/**
107	* scheduleWithFixedDelay executes runnable after given initial delay
108	*/
109	public void testSchedule5() {
110	try {
111	TrackedShortRunnable runnable = new TrackedShortRunnable();
112	ScheduledExecutor p1 = new ScheduledExecutor(1);
113	ScheduledCancellable h = p1.scheduleWithFixedDelay(runnable, SHORT_DELAY_MS, SHORT_DELAY_MS, TimeUnit.MILLISECONDS);
114	assertFalse(runnable.done);
115	Thread.sleep(MEDIUM_DELAY_MS);
116	assertTrue(runnable.done);
117	h.cancel(true);
118	p1.shutdown();
119	joinPool(p1);
120	} catch(Exception e){
121	unexpectedException();
122	}
123	}
124
125	/**
126	* execute (null) throws NPE
127	*/
128	public void testExecuteNull() {
129	ScheduledExecutor se = null;
130	try {
131	se = new ScheduledExecutor(1);
132	se.execute(null);
133	shouldThrow();
134	} catch(NullPointerException success){}
135	catch(Exception e){
136	unexpectedException();
137	}
138
139	joinPool(se);
140	}
141
142	/**
143	* schedule (null) throws NPE
144	*/
145	public void testScheduleNull() {
146	ScheduledExecutor se = new ScheduledExecutor(1);
147	try {
148	TrackedCallable callable = null;
149	Future f = se.schedule(callable, SHORT_DELAY_MS, TimeUnit.MILLISECONDS);
150	shouldThrow();
151	} catch(NullPointerException success){}
152	catch(Exception e){
153	unexpectedException();
154	}
155	joinPool(se);
156	}
157
158	/**
159	* execute throws RejectedExecutionException if shutdown
160	*/
161	public void testSchedule1_RejectedExecutionException() {
162	ScheduledExecutor se = new ScheduledExecutor(1);
163	try {
164	se.shutdown();
165	se.schedule(new NoOpRunnable(),
166	MEDIUM_DELAY_MS, TimeUnit.MILLISECONDS);
167	shouldThrow();
168	} catch(RejectedExecutionException success){
169	}
170	joinPool(se);
171
172	}
173
174	/**
175	* schedule throws RejectedExecutionException if shutdown
176	*/
177	public void testSchedule2_RejectedExecutionException() {
178	ScheduledExecutor se = new ScheduledExecutor(1);
179	try {
180	se.shutdown();
181	se.schedule(new NoOpCallable(),
182	MEDIUM_DELAY_MS, TimeUnit.MILLISECONDS);
183	shouldThrow();
184	} catch(RejectedExecutionException success){
185	}
186	joinPool(se);
187	}
188
189	/**
190	* schedule callable throws RejectedExecutionException if shutdown
191	*/
192	public void testSchedule3_RejectedExecutionException() {
193	ScheduledExecutor se = new ScheduledExecutor(1);
194	try {
195	se.shutdown();
196	se.schedule(new NoOpCallable(),
197	MEDIUM_DELAY_MS, TimeUnit.MILLISECONDS);
198	shouldThrow();
199	} catch(RejectedExecutionException success){
200	}
201	joinPool(se);
202	}
203
204	/**
205	* scheduleAtFixedRate throws RejectedExecutionException if shutdown
206	*/
207	public void testScheduleAtFixedRate1_RejectedExecutionException() {
208	ScheduledExecutor se = new ScheduledExecutor(1);
209	try {
210	se.shutdown();
211	se.scheduleAtFixedRate(new NoOpRunnable(),
212	MEDIUM_DELAY_MS, MEDIUM_DELAY_MS, TimeUnit.MILLISECONDS);
213	shouldThrow();
214	} catch(RejectedExecutionException success){
215	}
216	joinPool(se);
217	}
218
219	/**
220	* scheduleWithFixedDelay throws RejectedExecutionException if shutdown
221	*/
222	public void testScheduleWithFixedDelay1_RejectedExecutionException() {
223	ScheduledExecutor se = new ScheduledExecutor(1);
224	try {
225	se.shutdown();
226	se.scheduleWithFixedDelay(new NoOpRunnable(),
227	MEDIUM_DELAY_MS, MEDIUM_DELAY_MS, TimeUnit.MILLISECONDS);
228	shouldThrow();
229	} catch(RejectedExecutionException success){
230	}
231	joinPool(se);
232	}
233
234	/**
235	* getActiveCount increases but doesn't overestimate, when a
236	* thread becomes active
237	*/
238	public void testGetActiveCount() {
239	ScheduledExecutor p2 = new ScheduledExecutor(2);
240	assertEquals(0, p2.getActiveCount());
241	p2.execute(new SmallRunnable());
242	try {
243	Thread.sleep(SHORT_DELAY_MS);
244	} catch(Exception e){
245	unexpectedException();
246	}
247	assertEquals(1, p2.getActiveCount());
248	joinPool(p2);
249	}
250
251	/**
252	* getCompletedTaskCount increases, but doesn't overestimate,
253	* when tasks complete
254	*/
255	public void testGetCompletedTaskCount() {
256	ScheduledExecutor p2 = new ScheduledExecutor(2);
257	assertEquals(0, p2.getCompletedTaskCount());
258	p2.execute(new SmallRunnable());
259	try {
260	Thread.sleep(MEDIUM_DELAY_MS);
261	} catch(Exception e){
262	unexpectedException();
263	}
264	assertEquals(1, p2.getCompletedTaskCount());
265	joinPool(p2);
266	}
267
268	/**
269	* getCorePoolSize returns size given in constructor if not otherwise set
270	*/
271	public void testGetCorePoolSize() {
272	ScheduledExecutor p1 = new ScheduledExecutor(1);
273	assertEquals(1, p1.getCorePoolSize());
274	joinPool(p1);
275	}
276
277	/**
278	* getLargestPoolSize increases, but doesn't overestimate, when
279	* multiple threads active
280	*/
281	public void testGetLargestPoolSize() {
282	ScheduledExecutor p2 = new ScheduledExecutor(2);
283	assertEquals(0, p2.getLargestPoolSize());
284	p2.execute(new SmallRunnable());
285	p2.execute(new SmallRunnable());
286	try {
287	Thread.sleep(SHORT_DELAY_MS);
288	} catch(Exception e){
289	unexpectedException();
290	}
291	assertEquals(2, p2.getLargestPoolSize());
292	joinPool(p2);
293	}
294
295	/**
296	* getPoolSize increases, but doesn't overestimate, when threads
297	* become active
298	*/
299	public void testGetPoolSize() {
300	ScheduledExecutor p1 = new ScheduledExecutor(1);
301	assertEquals(0, p1.getPoolSize());
302	p1.execute(new SmallRunnable());
303	assertEquals(1, p1.getPoolSize());
304	joinPool(p1);
305	}
306
307	/**
308	* getTaskCount increases, but doesn't overestimate, when tasks
309	* submitted
310	*/
311	public void testGetTaskCount() {
312	ScheduledExecutor p1 = new ScheduledExecutor(1);
313	assertEquals(0, p1.getTaskCount());
314	for(int i = 0; i < 5; i++)
315	p1.execute(new SmallRunnable());
316	try {
317	Thread.sleep(SHORT_DELAY_MS);
318	} catch(Exception e){
319	unexpectedException();
320	}
321	assertEquals(5, p1.getTaskCount());
322	joinPool(p1);
323	}
324
325	/**
326	* getThreadFactory returns factory in constructor if not set
327	*/
328	public void testGetThreadFactory() {
329	ThreadFactory tf = new SimpleThreadFactory();
330	ScheduledExecutor p = new ScheduledExecutor(1, tf);
331	assertSame(tf, p.getThreadFactory());
332	p.shutdown();
333	joinPool(p);
334	}
335
336	/**
337	* setThreadFactory sets the thread factory returned by getThreadFactory
338	*/
339	public void testSetThreadFactory() {
340	ThreadFactory tf = new SimpleThreadFactory();
341	ScheduledExecutor p = new ScheduledExecutor(1);
342	p.setThreadFactory(tf);
343	assertSame(tf, p.getThreadFactory());
344	p.shutdown();
345	joinPool(p);
346	}
347
348	/**
349	* setThreadFactory(null) throws NPE
350	*/
351	public void testSetThreadFactoryNull() {
352	ScheduledExecutor p = new ScheduledExecutor(1);
353	try {
354	p.setThreadFactory(null);
355	shouldThrow();
356	} catch (NullPointerException success) {
357	} finally {
358	joinPool(p);
359	}
360	}
361
362	/**
363	* is isShutDown is false before shutdown, true after
364	*/
365	public void testIsShutdown() {
366
367	ScheduledExecutor p1 = new ScheduledExecutor(1);
368	try {
369	assertFalse(p1.isShutdown());
370	}
371	finally {
372	p1.shutdown();
373	}
374	assertTrue(p1.isShutdown());
375	}
376
377
378	/**
379	* isTerminated is false before termination, true after
380	*/
381	public void testIsTerminated() {
382	ScheduledExecutor p1 = new ScheduledExecutor(1);
383	try {
384	p1.execute(new SmallRunnable());
385	} finally {
386	p1.shutdown();
387	}
388	try {
389	assertTrue(p1.awaitTermination(LONG_DELAY_MS, TimeUnit.MILLISECONDS));
390	assertTrue(p1.isTerminated());
391	} catch(Exception e){
392	unexpectedException();
393	}
394	}
395
396	/**
397	* isTerminating is not true when running or when terminated
398	*/
399	public void testIsTerminating() {
400	ScheduledExecutor p1 = new ScheduledExecutor(1);
401	assertFalse(p1.isTerminating());
402	try {
403	p1.execute(new SmallRunnable());
404	assertFalse(p1.isTerminating());
405	} finally {
406	p1.shutdown();
407	}
408	try {
409	assertTrue(p1.awaitTermination(LONG_DELAY_MS, TimeUnit.MILLISECONDS));
410	assertTrue(p1.isTerminated());
411	assertFalse(p1.isTerminating());
412	} catch(Exception e){
413	unexpectedException();
414	}
415	}
416
417	/**
418	* getQueue returns the work queue, which contains queued tasks
419	*/
420	public void testGetQueue() {
421	ScheduledExecutor p1 = new ScheduledExecutor(1);
422	ScheduledCancellable[] tasks = new ScheduledCancellable[5];
423	for(int i = 0; i < 5; i++){
424	tasks[i] = p1.schedule(new SmallPossiblyInterruptedRunnable(), 1, TimeUnit.MILLISECONDS);
425	}
426	try {
427	Thread.sleep(SHORT_DELAY_MS);
428	BlockingQueue<Runnable> q = p1.getQueue();
429	assertTrue(q.contains(tasks[4]));
430	assertFalse(q.contains(tasks[0]));
431	p1.shutdownNow();
432	} catch(Exception e) {
433	unexpectedException();
434	} finally {
435	joinPool(p1);
436	}
437	}
438
439	/**
440	* remove(task) removes queued task, and fails to remove active task
441	*/
442	public void testRemove() {
443	ScheduledExecutor p1 = new ScheduledExecutor(1);
444	ScheduledCancellable[] tasks = new ScheduledCancellable[5];
445	for(int i = 0; i < 5; i++){
446	tasks[i] = p1.schedule(new SmallPossiblyInterruptedRunnable(), 1, TimeUnit.MILLISECONDS);
447	}
448	try {
449	Thread.sleep(SHORT_DELAY_MS);
450	BlockingQueue<Runnable> q = p1.getQueue();
451	assertFalse(p1.remove((Runnable)tasks[0]));
452	assertTrue(q.contains((Runnable)tasks[4]));
453	assertTrue(q.contains((Runnable)tasks[3]));
454	assertTrue(p1.remove((Runnable)tasks[4]));
455	assertFalse(p1.remove((Runnable)tasks[4]));
456	assertFalse(q.contains((Runnable)tasks[4]));
457	assertTrue(q.contains((Runnable)tasks[3]));
458	assertTrue(p1.remove((Runnable)tasks[3]));
459	assertFalse(q.contains((Runnable)tasks[3]));
460	p1.shutdownNow();
461	} catch(Exception e) {
462	unexpectedException();
463	} finally {
464	joinPool(p1);
465	}
466	}
467
468	/**
469	* purge removes cancelled tasks from the queue
470	*/
471	public void testPurge() {
472	ScheduledExecutor p1 = new ScheduledExecutor(1);
473	ScheduledCancellable[] tasks = new ScheduledCancellable[5];
474	for(int i = 0; i < 5; i++){
475	tasks[i] = p1.schedule(new SmallPossiblyInterruptedRunnable(), 1, TimeUnit.MILLISECONDS);
476	}
477	int max = 5;
478	if (tasks[4].cancel(true)) --max;
479	if (tasks[3].cancel(true)) --max;
480	p1.purge();
481	long count = p1.getTaskCount();
482	assertTrue(count > 0 && count <= max);
483	joinPool(p1);
484	}
485
486	/**
487	* shutDownNow returns a list containing tasks that were not run
488	*/
489	public void testShutDownNow() {
490	ScheduledExecutor p1 = new ScheduledExecutor(1);
491	for(int i = 0; i < 5; i++)
492	p1.schedule(new SmallPossiblyInterruptedRunnable(), SHORT_DELAY_MS, TimeUnit.MILLISECONDS);
493	List l = p1.shutdownNow();
494	assertTrue(p1.isShutdown());
495	assertTrue(l.size() > 0 && l.size() <= 5);
496	joinPool(p1);
497	}
498
499	/**
500	* In default setting, shutdown cancels periodic but not delayed
501	* tasks at shutdown
502	*/
503	public void testShutDown1() {
504	try {
505	ScheduledExecutor p1 = new ScheduledExecutor(1);
506	assertTrue(p1.getExecuteExistingDelayedTasksAfterShutdownPolicy());
507	assertFalse(p1.getContinueExistingPeriodicTasksAfterShutdownPolicy());
508
509	ScheduledCancellable[] tasks = new ScheduledCancellable[5];
510	for(int i = 0; i < 5; i++)
511	tasks[i] = p1.schedule(new NoOpRunnable(), SHORT_DELAY_MS, TimeUnit.MILLISECONDS);
512	p1.shutdown();
513	BlockingQueue q = p1.getQueue();
514	for (Iterator it = q.iterator(); it.hasNext();) {
515	ScheduledCancellable t = (ScheduledCancellable)it.next();
516	assertFalse(t.isCancelled());
517	}
518	assertTrue(p1.isShutdown());
519	Thread.sleep(SMALL_DELAY_MS);
520	for (int i = 0; i < 5; ++i) {
521	assertTrue(tasks[i].isDone());
522	assertFalse(tasks[i].isCancelled());
523	}
524
525	}
526	catch(Exception ex) {
527	unexpectedException();
528	}
529	}
530
531
532	/**
533	* If setExecuteExistingDelayedTasksAfterShutdownPolicy is false,
534	* delayed tasks are cancelled at shutdown
535	*/
536	public void testShutDown2() {
537	try {
538	ScheduledExecutor p1 = new ScheduledExecutor(1);
539	p1.setExecuteExistingDelayedTasksAfterShutdownPolicy(false);
540	ScheduledCancellable[] tasks = new ScheduledCancellable[5];
541	for(int i = 0; i < 5; i++)
542	tasks[i] = p1.schedule(new NoOpRunnable(), SHORT_DELAY_MS, TimeUnit.MILLISECONDS);
543	p1.shutdown();
544	assertTrue(p1.isShutdown());
545	BlockingQueue q = p1.getQueue();
546	assertTrue(q.isEmpty());
547	Thread.sleep(SMALL_DELAY_MS);
548	assertTrue(p1.isTerminated());
549	}
550	catch(Exception ex) {
551	unexpectedException();
552	}
553	}
554
555
556	/**
557	* If setContinueExistingPeriodicTasksAfterShutdownPolicy is set false,
558	* periodic tasks are not cancelled at shutdown
559	*/
560	public void testShutDown3() {
561	try {
562	ScheduledExecutor p1 = new ScheduledExecutor(1);
563	p1.setContinueExistingPeriodicTasksAfterShutdownPolicy(false);
564	ScheduledCancellable task =
565	p1.scheduleAtFixedRate(new NoOpRunnable(), 5, 5, TimeUnit.MILLISECONDS);
566	p1.shutdown();
567	assertTrue(p1.isShutdown());
568	BlockingQueue q = p1.getQueue();
569	assertTrue(q.isEmpty());
570	Thread.sleep(SHORT_DELAY_MS);
571	assertTrue(p1.isTerminated());
572	}
573	catch(Exception ex) {
574	unexpectedException();
575	}
576	}
577
578	/**
579	* if setContinueExistingPeriodicTasksAfterShutdownPolicy is true,
580	* periodic tasks are cancelled at shutdown
581	*/
582	public void testShutDown4() {
583	ScheduledExecutor p1 = new ScheduledExecutor(1);
584	try {
585	p1.setContinueExistingPeriodicTasksAfterShutdownPolicy(true);
586	ScheduledCancellable task =
587	p1.scheduleAtFixedRate(new NoOpRunnable(), 5, 5, TimeUnit.MILLISECONDS);
588	assertFalse(task.isCancelled());
589	p1.shutdown();
590	assertFalse(task.isCancelled());
591	assertFalse(p1.isTerminated());
592	assertTrue(p1.isShutdown());
593	Thread.sleep(SHORT_DELAY_MS);
594	assertFalse(task.isCancelled());
595	task.cancel(true);
596	assertTrue(task.isCancelled());
597	Thread.sleep(SHORT_DELAY_MS);
598	assertTrue(p1.isTerminated());
599	}
600	catch(Exception ex) {
601	unexpectedException();
602	}
603	finally {
604	p1.shutdownNow();
605	}
606	}
607
608	}