test/tck/SynchronousQueueTest.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.*;
import java.io.*;

public class SynchronousQueueTest extends JSR166TestCase {

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

    public static Test suite() {
        return new TestSuite(SynchronousQueueTest.class);
    }

    public void testEmptyFull() {
        SynchronousQueue q = new SynchronousQueue();
        assertTrue(q.isEmpty());
        assertEquals(0, q.size());
        assertEquals(0, q.remainingCapacity());
        assertFalse(q.offer(new Integer(3)));
    }

    public void testOfferNull(){
        try {
            SynchronousQueue q = new SynchronousQueue();
            q.offer(null);
            fail("should throw NPE");
        } catch (NullPointerException success) { }   
    }

    public void testOffer(){
        SynchronousQueue q = new SynchronousQueue();
        assertFalse(q.offer(new Integer(1)));
    }

    public void testAdd(){
        try {
            SynchronousQueue q = new SynchronousQueue();
            assertEquals(0, q.remainingCapacity());
            q.add(new Integer(0));
        } catch (IllegalStateException success){
        }   
    }

    public void testAddAll1(){
        try {
            SynchronousQueue q = new SynchronousQueue();
            q.addAll(null);
            fail("Cannot add null collection");
        }
        catch (NullPointerException success) {}
    }
    public void testAddAll2(){
        try {
            SynchronousQueue q = new SynchronousQueue();
            Integer[] ints = new Integer[1];
            q.addAll(Arrays.asList(ints));
            fail("Cannot add null elements");
        }
        catch (NullPointerException success) {}
    }
    public void testAddAll4(){
        try {
            SynchronousQueue q = new SynchronousQueue();
            Integer[] ints = new Integer[1];
            for (int i = 0; i < 1; ++i)
                ints[i] = new Integer(i);
            q.addAll(Arrays.asList(ints));
            fail("Cannot add with insufficient capacity");
        }
        catch (IllegalStateException success) {}
    }

    public void testPutNull() {
        try {
            SynchronousQueue q = new SynchronousQueue();
            q.put(null);
            fail("put should throw NPE");
        } 
        catch (NullPointerException success){
        }   
        catch (InterruptedException ie) {
            fail("Unexpected exception");
        }
     }

    public void testBlockingPut(){
        Thread t = new Thread(new Runnable() {
                public void run() {
                    try {
                        SynchronousQueue q = new SynchronousQueue();
                        q.put(new Integer(0));
                        threadFail("put should block");
                    } catch (InterruptedException ie){
                    }   
                }});
        t.start();
        try { 
           Thread.sleep(SHORT_DELAY_MS); 
           t.interrupt();
           t.join();
        }
        catch (InterruptedException ie) {
            fail("Unexpected exception");
        }
    }

    public void testPutWithTake() {
        final SynchronousQueue q = new SynchronousQueue();
        Thread t = new Thread(new Runnable() {
                public void run(){
                    int added = 0;
                    try {
                        q.put(new Object());
                        ++added;
                        q.put(new Object());
                        ++added;
                        q.put(new Object());
                        ++added;
                        q.put(new Object());
                        ++added;
                        threadFail("Should block");
                    } catch (InterruptedException e){
                        assertTrue(added >= 1);
                    }
                }
            });
        try {
            t.start();
            Thread.sleep(SHORT_DELAY_MS);
            q.take();
            Thread.sleep(SHORT_DELAY_MS);
            t.interrupt();
            t.join();
        } catch (Exception e){
            fail("Unexpected exception");
        }
    }

    public void testTimedOffer() {
        final SynchronousQueue q = new SynchronousQueue();
        Thread t = new Thread(new Runnable() {
                public void run(){
                    try {

                        threadAssertFalse(q.offer(new Object(), SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
                        q.offer(new Object(), LONG_DELAY_MS, TimeUnit.MILLISECONDS);
                        threadFail("Should block");
                    } catch (InterruptedException success){}
                }
            });
        
        try {
            t.start();
            Thread.sleep(SMALL_DELAY_MS);
            t.interrupt();
            t.join();
        } catch (Exception e){
            fail("Unexpected exception");
        }
    }


    public void testTakeFromEmpty() {
        final SynchronousQueue q = new SynchronousQueue();
        Thread t = new Thread(new Runnable() {
                public void run(){
                    try {
                        q.take();
                        threadFail("Should block");
                    } catch (InterruptedException success){ }                
                }
            });
        try {
            t.start();
            Thread.sleep(SHORT_DELAY_MS);
            t.interrupt();
            t.join();
        } catch (Exception e){
            fail("Unexpected exception");
        }
    }

    public void testPoll(){
        SynchronousQueue q = new SynchronousQueue();
        assertNull(q.poll());
    }

    public void testTimedPoll0() {
        try {
            SynchronousQueue q = new SynchronousQueue();
            assertNull(q.poll(0, TimeUnit.MILLISECONDS));
        } catch (InterruptedException e){
            fail("Unexpected exception");
        }   
    }

    public void testTimedPoll() {
        try {
            SynchronousQueue q = new SynchronousQueue();
            assertNull(q.poll(SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
        } catch (InterruptedException e){
            fail("Unexpected exception");
        }   
    }

    public void testInterruptedTimedPoll(){
        Thread t = new Thread(new Runnable() {
                public void run() {
                    try {
                        SynchronousQueue q = new SynchronousQueue();
                        assertNull(q.poll(SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
                    } catch (InterruptedException success){
                    }   
                }});
        t.start();
        try { 
           Thread.sleep(SHORT_DELAY_MS); 
           t.interrupt();
           t.join();
        }
        catch (InterruptedException ie) {
            fail("Unexpected exception");
        }
    }

    public void testTimedPollWithOffer(){
        final SynchronousQueue q = new SynchronousQueue();
        Thread t = new Thread(new Runnable() {
                public void run(){
                    try {
                        threadAssertNull(q.poll(SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
                        q.poll(LONG_DELAY_MS, TimeUnit.MILLISECONDS);
                        q.poll(LONG_DELAY_MS, TimeUnit.MILLISECONDS);
                        threadFail("Should block");
                    } catch (InterruptedException success) { }                
                }
            });
        try {
            t.start();
            Thread.sleep(SMALL_DELAY_MS);
            assertTrue(q.offer(new Integer(0), SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
            t.interrupt();
            t.join();
        } catch (Exception e){
            fail("Unexpected exception");
        }
    }  


    public void testPeek(){
        SynchronousQueue q = new SynchronousQueue();
        assertNull(q.peek());
    }

    public void testElement(){
        SynchronousQueue q = new SynchronousQueue();
        try {
            q.element();
            fail("no such element");
        }
        catch (NoSuchElementException success) {}
    }

    public void testRemove(){
        SynchronousQueue q = new SynchronousQueue();
        try {
            q.remove();
            fail("remove should throw");
        } catch (NoSuchElementException success){
        }   
    }

    public void testRemoveElement(){
        SynchronousQueue q = new SynchronousQueue();
        assertFalse(q.remove(new Integer(0)));
        assertTrue(q.isEmpty());
    }
        
    public void testContains(){
        SynchronousQueue q = new SynchronousQueue();
        assertFalse(q.contains(new Integer(0)));
    }

    public void testClear(){
        SynchronousQueue q = new SynchronousQueue();
        q.clear();
        assertTrue(q.isEmpty());
    }

    public void testContainsAll(){
        SynchronousQueue q = new SynchronousQueue();
        Integer[] empty = new Integer[0];
        Integer[] ints = new Integer[1]; ints[0] = new Integer(0);
        //        assertTrue(q.containsAll(Arrays.asList(empty)));
        assertFalse(q.containsAll(Arrays.asList(ints)));
    }

    public void testRetainAll(){
        SynchronousQueue q = new SynchronousQueue();
        Integer[] empty = new Integer[0];
        Integer[] ints = new Integer[1]; ints[0] = new Integer(0);
        q.retainAll(Arrays.asList(ints));
        //        assertTrue(q.containsAll(Arrays.asList(empty)));
        assertFalse(q.containsAll(Arrays.asList(ints)));
    }

    public void testRemoveAll(){
        SynchronousQueue q = new SynchronousQueue();
        Integer[] empty = new Integer[0];
        Integer[] ints = new Integer[1]; ints[0] = new Integer(0);
        q.removeAll(Arrays.asList(ints));
        //        assertTrue(q.containsAll(Arrays.asList(empty)));
        assertFalse(q.containsAll(Arrays.asList(ints)));
    }


    public void testToArray(){
        SynchronousQueue q = new SynchronousQueue();
        Object[] o = q.toArray();
        assertEquals(o.length, 0);
    }

    public void testToArray2(){
        SynchronousQueue q = new SynchronousQueue();
        Integer[] ints = new Integer[1];
        assertNull(ints[0]);
    }
    
    public void testIterator(){
        SynchronousQueue q = new SynchronousQueue();
        Iterator it = q.iterator();
        assertFalse(it.hasNext());
        try {
            Object x = it.next();
            fail("should throw");
        }
        catch (NoSuchElementException success) {}
    }

    public void testIteratorRemove(){
        SynchronousQueue q = new SynchronousQueue();
        Iterator it = q.iterator();
        try {
            it.remove();
            fail("should throw");
        }
        catch (IllegalStateException success) {}
    }

    public void testToString(){
        SynchronousQueue q = new SynchronousQueue();
        String s = q.toString();
        assertTrue(s != null);
    }        


    public void testOfferInExecutor() {
        final SynchronousQueue q = new SynchronousQueue();
        ExecutorService executor = Executors.newFixedThreadPool(2);
        final Integer one = new Integer(1);

        executor.execute(new Runnable() {
            public void run() {
                threadAssertFalse(q.offer(one));
                try {
                    threadAssertTrue(q.offer(one, MEDIUM_DELAY_MS, TimeUnit.MILLISECONDS));
                    threadAssertEquals(0, q.remainingCapacity());
                }
                catch (InterruptedException e) {
                    threadFail("should not be interrupted");
                }
            }
        });

        executor.execute(new Runnable() {
            public void run() {
                try {
                    Thread.sleep(SMALL_DELAY_MS);
                    threadAssertEquals(one, q.take());
                }
                catch (InterruptedException e) {
                    fail("should not be interrupted");
                }
            }
        });
        
        joinPool(executor);

    }

    public void testPollInExecutor() {

        final SynchronousQueue q = new SynchronousQueue();

        ExecutorService executor = Executors.newFixedThreadPool(2);

        executor.execute(new Runnable() {
            public void run() {
                threadAssertNull(q.poll());
                try {
                    threadAssertTrue(null != q.poll(MEDIUM_DELAY_MS, TimeUnit.MILLISECONDS));
                    threadAssertTrue(q.isEmpty());
                }
                catch (InterruptedException e) {
                    threadFail("should not be interrupted");
                }
            }
        });

        executor.execute(new Runnable() {
            public void run() {
                try {
                    Thread.sleep(SMALL_DELAY_MS);
                    q.put(new Integer(1));
                }
                catch (InterruptedException e) {
                    threadFail("should not be interrupted");
                }
            }
        });
        
        joinPool(executor);

    }

    public void testSerialization() {
        SynchronousQueue q = new SynchronousQueue();
        try {
            ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
            ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
            out.writeObject(q);
            out.close();

            ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
            ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
            SynchronousQueue r = (SynchronousQueue)in.readObject();
            assertEquals(q.size(), r.size());
            while (!q.isEmpty()) 
                assertEquals(q.remove(), r.remove());
        } catch(Exception e){
            fail("unexpected exception");
        }
    }

}
Revision:	1.3
Committed:	Sun Sep 14 20:42:40 2003 UTC (20 years, 8 months ago) by dl
Branch:	MAIN
Changes since 1.2:	+29 -38 lines
Log Message:	New base class JSR166TestCase
#	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	import java.io.*;
12
13	public class SynchronousQueueTest extends JSR166TestCase {
14
15	public static void main(String[] args) {
16	junit.textui.TestRunner.run (suite());
17	}
18
19	public static Test suite() {
20	return new TestSuite(SynchronousQueueTest.class);
21	}
22
23	public void testEmptyFull() {
24	SynchronousQueue q = new SynchronousQueue();
25	assertTrue(q.isEmpty());
26	assertEquals(0, q.size());
27	assertEquals(0, q.remainingCapacity());
28	assertFalse(q.offer(new Integer(3)));
29	}
30
31	public void testOfferNull(){
32	try {
33	SynchronousQueue q = new SynchronousQueue();
34	q.offer(null);
35	fail("should throw NPE");
36	} catch (NullPointerException success) { }
37	}
38
39	public void testOffer(){
40	SynchronousQueue q = new SynchronousQueue();
41	assertFalse(q.offer(new Integer(1)));
42	}
43
44	public void testAdd(){
45	try {
46	SynchronousQueue q = new SynchronousQueue();
47	assertEquals(0, q.remainingCapacity());
48	q.add(new Integer(0));
49	} catch (IllegalStateException success){
50	}
51	}
52
53	public void testAddAll1(){
54	try {
55	SynchronousQueue q = new SynchronousQueue();
56	q.addAll(null);
57	fail("Cannot add null collection");
58	}
59	catch (NullPointerException success) {}
60	}
61	public void testAddAll2(){
62	try {
63	SynchronousQueue q = new SynchronousQueue();
64	Integer[] ints = new Integer[1];
65	q.addAll(Arrays.asList(ints));
66	fail("Cannot add null elements");
67	}
68	catch (NullPointerException success) {}
69	}
70	public void testAddAll4(){
71	try {
72	SynchronousQueue q = new SynchronousQueue();
73	Integer[] ints = new Integer[1];
74	for (int i = 0; i < 1; ++i)
75	ints[i] = new Integer(i);
76	q.addAll(Arrays.asList(ints));
77	fail("Cannot add with insufficient capacity");
78	}
79	catch (IllegalStateException success) {}
80	}
81
82	public void testPutNull() {
83	try {
84	SynchronousQueue q = new SynchronousQueue();
85	q.put(null);
86	fail("put should throw NPE");
87	}
88	catch (NullPointerException success){
89	}
90	catch (InterruptedException ie) {
91	fail("Unexpected exception");
92	}
93	}
94
95	public void testBlockingPut(){
96	Thread t = new Thread(new Runnable() {
97	public void run() {
98	try {
99	SynchronousQueue q = new SynchronousQueue();
100	q.put(new Integer(0));
101	threadFail("put should block");
102	} catch (InterruptedException ie){
103	}
104	}});
105	t.start();
106	try {
107	Thread.sleep(SHORT_DELAY_MS);
108	t.interrupt();
109	t.join();
110	}
111	catch (InterruptedException ie) {
112	fail("Unexpected exception");
113	}
114	}
115
116	public void testPutWithTake() {
117	final SynchronousQueue q = new SynchronousQueue();
118	Thread t = new Thread(new Runnable() {
119	public void run(){
120	int added = 0;
121	try {
122	q.put(new Object());
123	++added;
124	q.put(new Object());
125	++added;
126	q.put(new Object());
127	++added;
128	q.put(new Object());
129	++added;
130	threadFail("Should block");
131	} catch (InterruptedException e){
132	assertTrue(added >= 1);
133	}
134	}
135	});
136	try {
137	t.start();
138	Thread.sleep(SHORT_DELAY_MS);
139	q.take();
140	Thread.sleep(SHORT_DELAY_MS);
141	t.interrupt();
142	t.join();
143	} catch (Exception e){
144	fail("Unexpected exception");
145	}
146	}
147
148	public void testTimedOffer() {
149	final SynchronousQueue q = new SynchronousQueue();
150	Thread t = new Thread(new Runnable() {
151	public void run(){
152	try {
153
154	threadAssertFalse(q.offer(new Object(), SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
155	q.offer(new Object(), LONG_DELAY_MS, TimeUnit.MILLISECONDS);
156	threadFail("Should block");
157	} catch (InterruptedException success){}
158	}
159	});
160
161	try {
162	t.start();
163	Thread.sleep(SMALL_DELAY_MS);
164	t.interrupt();
165	t.join();
166	} catch (Exception e){
167	fail("Unexpected exception");
168	}
169	}
170
171
172	public void testTakeFromEmpty() {
173	final SynchronousQueue q = new SynchronousQueue();
174	Thread t = new Thread(new Runnable() {
175	public void run(){
176	try {
177	q.take();
178	threadFail("Should block");
179	} catch (InterruptedException success){ }
180	}
181	});
182	try {
183	t.start();
184	Thread.sleep(SHORT_DELAY_MS);
185	t.interrupt();
186	t.join();
187	} catch (Exception e){
188	fail("Unexpected exception");
189	}
190	}
191
192	public void testPoll(){
193	SynchronousQueue q = new SynchronousQueue();
194	assertNull(q.poll());
195	}
196
197	public void testTimedPoll0() {
198	try {
199	SynchronousQueue q = new SynchronousQueue();
200	assertNull(q.poll(0, TimeUnit.MILLISECONDS));
201	} catch (InterruptedException e){
202	fail("Unexpected exception");
203	}
204	}
205
206	public void testTimedPoll() {
207	try {
208	SynchronousQueue q = new SynchronousQueue();
209	assertNull(q.poll(SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
210	} catch (InterruptedException e){
211	fail("Unexpected exception");
212	}
213	}
214
215	public void testInterruptedTimedPoll(){
216	Thread t = new Thread(new Runnable() {
217	public void run() {
218	try {
219	SynchronousQueue q = new SynchronousQueue();
220	assertNull(q.poll(SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
221	} catch (InterruptedException success){
222	}
223	}});
224	t.start();
225	try {
226	Thread.sleep(SHORT_DELAY_MS);
227	t.interrupt();
228	t.join();
229	}
230	catch (InterruptedException ie) {
231	fail("Unexpected exception");
232	}
233	}
234
235	public void testTimedPollWithOffer(){
236	final SynchronousQueue q = new SynchronousQueue();
237	Thread t = new Thread(new Runnable() {
238	public void run(){
239	try {
240	threadAssertNull(q.poll(SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
241	q.poll(LONG_DELAY_MS, TimeUnit.MILLISECONDS);
242	q.poll(LONG_DELAY_MS, TimeUnit.MILLISECONDS);
243	threadFail("Should block");
244	} catch (InterruptedException success) { }
245	}
246	});
247	try {
248	t.start();
249	Thread.sleep(SMALL_DELAY_MS);
250	assertTrue(q.offer(new Integer(0), SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
251	t.interrupt();
252	t.join();
253	} catch (Exception e){
254	fail("Unexpected exception");
255	}
256	}
257
258
259	public void testPeek(){
260	SynchronousQueue q = new SynchronousQueue();
261	assertNull(q.peek());
262	}
263
264	public void testElement(){
265	SynchronousQueue q = new SynchronousQueue();
266	try {
267	q.element();
268	fail("no such element");
269	}
270	catch (NoSuchElementException success) {}
271	}
272
273	public void testRemove(){
274	SynchronousQueue q = new SynchronousQueue();
275	try {
276	q.remove();
277	fail("remove should throw");
278	} catch (NoSuchElementException success){
279	}
280	}
281
282	public void testRemoveElement(){
283	SynchronousQueue q = new SynchronousQueue();
284	assertFalse(q.remove(new Integer(0)));
285	assertTrue(q.isEmpty());
286	}
287
288	public void testContains(){
289	SynchronousQueue q = new SynchronousQueue();
290	assertFalse(q.contains(new Integer(0)));
291	}
292
293	public void testClear(){
294	SynchronousQueue q = new SynchronousQueue();
295	q.clear();
296	assertTrue(q.isEmpty());
297	}
298
299	public void testContainsAll(){
300	SynchronousQueue q = new SynchronousQueue();
301	Integer[] empty = new Integer[0];
302	Integer[] ints = new Integer[1]; ints[0] = new Integer(0);
303	// assertTrue(q.containsAll(Arrays.asList(empty)));
304	assertFalse(q.containsAll(Arrays.asList(ints)));
305	}
306
307	public void testRetainAll(){
308	SynchronousQueue q = new SynchronousQueue();
309	Integer[] empty = new Integer[0];
310	Integer[] ints = new Integer[1]; ints[0] = new Integer(0);
311	q.retainAll(Arrays.asList(ints));
312	// assertTrue(q.containsAll(Arrays.asList(empty)));
313	assertFalse(q.containsAll(Arrays.asList(ints)));
314	}
315
316	public void testRemoveAll(){
317	SynchronousQueue q = new SynchronousQueue();
318	Integer[] empty = new Integer[0];
319	Integer[] ints = new Integer[1]; ints[0] = new Integer(0);
320	q.removeAll(Arrays.asList(ints));
321	// assertTrue(q.containsAll(Arrays.asList(empty)));
322	assertFalse(q.containsAll(Arrays.asList(ints)));
323	}
324
325
326	public void testToArray(){
327	SynchronousQueue q = new SynchronousQueue();
328	Object[] o = q.toArray();
329	assertEquals(o.length, 0);
330	}
331
332	public void testToArray2(){
333	SynchronousQueue q = new SynchronousQueue();
334	Integer[] ints = new Integer[1];
335	assertNull(ints[0]);
336	}
337
338	public void testIterator(){
339	SynchronousQueue q = new SynchronousQueue();
340	Iterator it = q.iterator();
341	assertFalse(it.hasNext());
342	try {
343	Object x = it.next();
344	fail("should throw");
345	}
346	catch (NoSuchElementException success) {}
347	}
348
349	public void testIteratorRemove(){
350	SynchronousQueue q = new SynchronousQueue();
351	Iterator it = q.iterator();
352	try {
353	it.remove();
354	fail("should throw");
355	}
356	catch (IllegalStateException success) {}
357	}
358
359	public void testToString(){
360	SynchronousQueue q = new SynchronousQueue();
361	String s = q.toString();
362	assertTrue(s != null);
363	}
364
365
366	public void testOfferInExecutor() {
367	final SynchronousQueue q = new SynchronousQueue();
368	ExecutorService executor = Executors.newFixedThreadPool(2);
369	final Integer one = new Integer(1);
370
371	executor.execute(new Runnable() {
372	public void run() {
373	threadAssertFalse(q.offer(one));
374	try {
375	threadAssertTrue(q.offer(one, MEDIUM_DELAY_MS, TimeUnit.MILLISECONDS));
376	threadAssertEquals(0, q.remainingCapacity());
377	}
378	catch (InterruptedException e) {
379	threadFail("should not be interrupted");
380	}
381	}
382	});
383
384	executor.execute(new Runnable() {
385	public void run() {
386	try {
387	Thread.sleep(SMALL_DELAY_MS);
388	threadAssertEquals(one, q.take());
389	}
390	catch (InterruptedException e) {
391	fail("should not be interrupted");
392	}
393	}
394	});
395
396	joinPool(executor);
397
398	}
399
400	public void testPollInExecutor() {
401
402	final SynchronousQueue q = new SynchronousQueue();
403
404	ExecutorService executor = Executors.newFixedThreadPool(2);
405
406	executor.execute(new Runnable() {
407	public void run() {
408	threadAssertNull(q.poll());
409	try {
410	threadAssertTrue(null != q.poll(MEDIUM_DELAY_MS, TimeUnit.MILLISECONDS));
411	threadAssertTrue(q.isEmpty());
412	}
413	catch (InterruptedException e) {
414	threadFail("should not be interrupted");
415	}
416	}
417	});
418
419	executor.execute(new Runnable() {
420	public void run() {
421	try {
422	Thread.sleep(SMALL_DELAY_MS);
423	q.put(new Integer(1));
424	}
425	catch (InterruptedException e) {
426	threadFail("should not be interrupted");
427	}
428	}
429	});
430
431	joinPool(executor);
432
433	}
434
435	public void testSerialization() {
436	SynchronousQueue q = new SynchronousQueue();
437	try {
438	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
439	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
440	out.writeObject(q);
441	out.close();
442
443	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
444	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
445	SynchronousQueue r = (SynchronousQueue)in.readObject();
446	assertEquals(q.size(), r.size());
447	while (!q.isEmpty())
448	assertEquals(q.remove(), r.remove());
449	} catch(Exception e){
450	fail("unexpected exception");
451	}
452	}
453
454	}