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Comparing jsr166/src/test/tck/TimeUnitTest.java (file contents):
Revision 1.1 by dl, Sun Aug 31 19:24:56 2003 UTC vs.
Revision 1.20 by jsr166, Fri May 27 19:12:09 2011 UTC

#	Line 1 | Line 1
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.
2	>	* Written by Doug Lea with assistance from members of JCP JSR-166
3	>	* Expert Group and released to the public domain, as explained at
4	>	* http://creativecommons.org/publicdomain/zero/1.0/
5	>	* Other contributors include Andrew Wright, Jeffrey Hayes,
6	>	* Pat Fisher, Mike Judd.
7		*/
8
8	–
9		import junit.framework.*;
10		import java.util.concurrent.*;
11	+	import java.io.*;
12
13	<	public class TimeUnitTest extends TestCase {
13	<	static public boolean DEBUG = false;
14	<
15	<
13	>	public class TimeUnitTest extends JSR166TestCase {
14		public static void main(String[] args) {
15	<	junit.textui.TestRunner.run(suite());
15	>	junit.textui.TestRunner.run(suite());
16		}
17	<
17	>
18		public static Test suite() {
19	<	return new TestSuite(TimeUnitTest.class);
19	>	return new TestSuite(TimeUnitTest.class);
20		}
21
22	+	// (loops to 88888 check increments at all time divisions.)
23	+
24	+	/**
25	+	* convert correctly converts sample values across the units
26	+	*/
27		public void testConvert() {
28	<	for (long t = 0; t < 10; ++t) {
29	<	assertEquals(t,
30	<	TimeUnit.SECONDS.convert(t,
28	>	for (long t = 0; t < 88888; ++t) {
29	>	assertEquals(t*60*60*24,
30	>	TimeUnit.SECONDS.convert(t,
31	>	TimeUnit.DAYS));
32	>	assertEquals(t*60*60,
33	>	TimeUnit.SECONDS.convert(t,
34	>	TimeUnit.HOURS));
35	>	assertEquals(t*60,
36	>	TimeUnit.SECONDS.convert(t,
37	>	TimeUnit.MINUTES));
38	>	assertEquals(t,
39	>	TimeUnit.SECONDS.convert(t,
40		TimeUnit.SECONDS));
41	<	assertEquals(t,
42	<	TimeUnit.SECONDS.convert(1000 * t,
41	>	assertEquals(t,
42	>	TimeUnit.SECONDS.convert(1000L*t,
43		TimeUnit.MILLISECONDS));
44	<	assertEquals(t,
45	<	TimeUnit.SECONDS.convert(1000000 * t,
44	>	assertEquals(t,
45	>	TimeUnit.SECONDS.convert(1000000L*t,
46		TimeUnit.MICROSECONDS));
47	<	assertEquals(t,
48	<	TimeUnit.SECONDS.convert(1000000000 * t,
47	>	assertEquals(t,
48	>	TimeUnit.SECONDS.convert(1000000000L*t,
49		TimeUnit.NANOSECONDS));
50	<	assertEquals(1000 * t,
51	<	TimeUnit.MILLISECONDS.convert(t,
50	>
51	>	assertEquals(1000L*t*60*60*24,
52	>	TimeUnit.MILLISECONDS.convert(t,
53	>	TimeUnit.DAYS));
54	>	assertEquals(1000L*t*60*60,
55	>	TimeUnit.MILLISECONDS.convert(t,
56	>	TimeUnit.HOURS));
57	>	assertEquals(1000L*t*60,
58	>	TimeUnit.MILLISECONDS.convert(t,
59	>	TimeUnit.MINUTES));
60	>	assertEquals(1000L*t,
61	>	TimeUnit.MILLISECONDS.convert(t,
62		TimeUnit.SECONDS));
63	<	assertEquals(t,
64	<	TimeUnit.MILLISECONDS.convert(t,
63	>	assertEquals(t,
64	>	TimeUnit.MILLISECONDS.convert(t,
65		TimeUnit.MILLISECONDS));
66	<	assertEquals(t,
67	<	TimeUnit.MILLISECONDS.convert(1000 * t,
66	>	assertEquals(t,
67	>	TimeUnit.MILLISECONDS.convert(1000L*t,
68		TimeUnit.MICROSECONDS));
69	<	assertEquals(t,
70	<	TimeUnit.MILLISECONDS.convert(1000000 * t,
69	>	assertEquals(t,
70	>	TimeUnit.MILLISECONDS.convert(1000000L*t,
71		TimeUnit.NANOSECONDS));
72	<	assertEquals(1000000 * t,
73	<	TimeUnit.MICROSECONDS.convert(t,
72	>
73	>	assertEquals(1000000L*t*60*60*24,
74	>	TimeUnit.MICROSECONDS.convert(t,
75	>	TimeUnit.DAYS));
76	>	assertEquals(1000000L*t*60*60,
77	>	TimeUnit.MICROSECONDS.convert(t,
78	>	TimeUnit.HOURS));
79	>	assertEquals(1000000L*t*60,
80	>	TimeUnit.MICROSECONDS.convert(t,
81	>	TimeUnit.MINUTES));
82	>	assertEquals(1000000L*t,
83	>	TimeUnit.MICROSECONDS.convert(t,
84		TimeUnit.SECONDS));
85	<	assertEquals(1000 * t,
86	<	TimeUnit.MICROSECONDS.convert(t,
85	>	assertEquals(1000L*t,
86	>	TimeUnit.MICROSECONDS.convert(t,
87		TimeUnit.MILLISECONDS));
88	<	assertEquals(t,
89	<	TimeUnit.MICROSECONDS.convert(t,
88	>	assertEquals(t,
89	>	TimeUnit.MICROSECONDS.convert(t,
90		TimeUnit.MICROSECONDS));
91	<	assertEquals(t,
92	<	TimeUnit.MICROSECONDS.convert(1000 * t,
91	>	assertEquals(t,
92	>	TimeUnit.MICROSECONDS.convert(1000L*t,
93		TimeUnit.NANOSECONDS));
94	<	assertEquals(1000000000 * t,
95	<	TimeUnit.NANOSECONDS.convert(t,
94	>
95	>	assertEquals(1000000000L*t*60*60*24,
96	>	TimeUnit.NANOSECONDS.convert(t,
97	>	TimeUnit.DAYS));
98	>	assertEquals(1000000000L*t*60*60,
99	>	TimeUnit.NANOSECONDS.convert(t,
100	>	TimeUnit.HOURS));
101	>	assertEquals(1000000000L*t*60,
102	>	TimeUnit.NANOSECONDS.convert(t,
103	>	TimeUnit.MINUTES));
104	>	assertEquals(1000000000L*t,
105	>	TimeUnit.NANOSECONDS.convert(t,
106		TimeUnit.SECONDS));
107	<	assertEquals(1000000 * t,
108	<	TimeUnit.NANOSECONDS.convert(t,
107	>	assertEquals(1000000L*t,
108	>	TimeUnit.NANOSECONDS.convert(t,
109		TimeUnit.MILLISECONDS));
110	<	assertEquals(1000 * t,
111	<	TimeUnit.NANOSECONDS.convert(t,
110	>	assertEquals(1000L*t,
111	>	TimeUnit.NANOSECONDS.convert(t,
112		TimeUnit.MICROSECONDS));
113	<	assertEquals(t,
114	<	TimeUnit.NANOSECONDS.convert(t,
113	>	assertEquals(t,
114	>	TimeUnit.NANOSECONDS.convert(t,
115		TimeUnit.NANOSECONDS));
116		}
117		}
118
119	+	/**
120	+	* toNanos correctly converts sample values in different units to
121	+	* nanoseconds
122	+	*/
123		public void testToNanos() {
124	<	for (long t = 0; t < 10; ++t) {
125	<	assertEquals(1000000000 * t,
124	>	for (long t = 0; t < 88888; ++t) {
125	>	assertEquals(t*1000000000L*60*60*24,
126	>	TimeUnit.DAYS.toNanos(t));
127	>	assertEquals(t*1000000000L*60*60,
128	>	TimeUnit.HOURS.toNanos(t));
129	>	assertEquals(t*1000000000L*60,
130	>	TimeUnit.MINUTES.toNanos(t));
131	>	assertEquals(1000000000L*t,
132		TimeUnit.SECONDS.toNanos(t));
133	<
82	<	assertEquals(1000000 * t,
133	>	assertEquals(1000000L*t,
134		TimeUnit.MILLISECONDS.toNanos(t));
135	<	assertEquals(1000 * t,
135	>	assertEquals(1000L*t,
136		TimeUnit.MICROSECONDS.toNanos(t));
137	<	assertEquals(t,
138	<	TimeUnit.SECONDS.NANOSECONDS.toNanos(t));
137	>	assertEquals(t,
138	>	TimeUnit.NANOSECONDS.toNanos(t));
139	>	}
140	>	}
141	>
142	>	/**
143	>	* toMicros correctly converts sample values in different units to
144	>	* microseconds
145	>	*/
146	>	public void testToMicros() {
147	>	for (long t = 0; t < 88888; ++t) {
148	>	assertEquals(t*1000000L*60*60*24,
149	>	TimeUnit.DAYS.toMicros(t));
150	>	assertEquals(t*1000000L*60*60,
151	>	TimeUnit.HOURS.toMicros(t));
152	>	assertEquals(t*1000000L*60,
153	>	TimeUnit.MINUTES.toMicros(t));
154	>	assertEquals(1000000L*t,
155	>	TimeUnit.SECONDS.toMicros(t));
156	>	assertEquals(1000L*t,
157	>	TimeUnit.MILLISECONDS.toMicros(t));
158	>	assertEquals(t,
159	>	TimeUnit.MICROSECONDS.toMicros(t));
160	>	assertEquals(t,
161	>	TimeUnit.NANOSECONDS.toMicros(t*1000L));
162	>	}
163	>	}
164	>
165	>	/**
166	>	* toMillis correctly converts sample values in different units to
167	>	* milliseconds
168	>	*/
169	>	public void testToMillis() {
170	>	for (long t = 0; t < 88888; ++t) {
171	>	assertEquals(t*1000L*60*60*24,
172	>	TimeUnit.DAYS.toMillis(t));
173	>	assertEquals(t*1000L*60*60,
174	>	TimeUnit.HOURS.toMillis(t));
175	>	assertEquals(t*1000L*60,
176	>	TimeUnit.MINUTES.toMillis(t));
177	>	assertEquals(1000L*t,
178	>	TimeUnit.SECONDS.toMillis(t));
179	>	assertEquals(t,
180	>	TimeUnit.MILLISECONDS.toMillis(t));
181	>	assertEquals(t,
182	>	TimeUnit.MICROSECONDS.toMillis(t*1000L));
183	>	assertEquals(t,
184	>	TimeUnit.NANOSECONDS.toMillis(t*1000000L));
185		}
186		}
187
188	+	/**
189	+	* toSeconds correctly converts sample values in different units to
190	+	* seconds
191	+	*/
192	+	public void testToSeconds() {
193	+	for (long t = 0; t < 88888; ++t) {
194	+	assertEquals(t*60*60*24,
195	+	TimeUnit.DAYS.toSeconds(t));
196	+	assertEquals(t*60*60,
197	+	TimeUnit.HOURS.toSeconds(t));
198	+	assertEquals(t*60,
199	+	TimeUnit.MINUTES.toSeconds(t));
200	+	assertEquals(t,
201	+	TimeUnit.SECONDS.toSeconds(t));
202	+	assertEquals(t,
203	+	TimeUnit.MILLISECONDS.toSeconds(t*1000L));
204	+	assertEquals(t,
205	+	TimeUnit.MICROSECONDS.toSeconds(t*1000000L));
206	+	assertEquals(t,
207	+	TimeUnit.NANOSECONDS.toSeconds(t*1000000000L));
208	+	}
209	+	}
210	+
211	+	/**
212	+	* toMinutes correctly converts sample values in different units to
213	+	* minutes
214	+	*/
215	+	public void testToMinutes() {
216	+	for (long t = 0; t < 88888; ++t) {
217	+	assertEquals(t*60*24,
218	+	TimeUnit.DAYS.toMinutes(t));
219	+	assertEquals(t*60,
220	+	TimeUnit.HOURS.toMinutes(t));
221	+	assertEquals(t,
222	+	TimeUnit.MINUTES.toMinutes(t));
223	+	assertEquals(t,
224	+	TimeUnit.SECONDS.toMinutes(t*60));
225	+	assertEquals(t,
226	+	TimeUnit.MILLISECONDS.toMinutes(t*1000L*60));
227	+	assertEquals(t,
228	+	TimeUnit.MICROSECONDS.toMinutes(t*1000000L*60));
229	+	assertEquals(t,
230	+	TimeUnit.NANOSECONDS.toMinutes(t*1000000000L*60));
231	+	}
232	+	}
233
234	+	/**
235	+	* toHours correctly converts sample values in different units to
236	+	* hours
237	+	*/
238	+	public void testToHours() {
239	+	for (long t = 0; t < 88888; ++t) {
240	+	assertEquals(t*24,
241	+	TimeUnit.DAYS.toHours(t));
242	+	assertEquals(t,
243	+	TimeUnit.HOURS.toHours(t));
244	+	assertEquals(t,
245	+	TimeUnit.MINUTES.toHours(t*60));
246	+	assertEquals(t,
247	+	TimeUnit.SECONDS.toHours(t*60*60));
248	+	assertEquals(t,
249	+	TimeUnit.MILLISECONDS.toHours(t*1000L*60*60));
250	+	assertEquals(t,
251	+	TimeUnit.MICROSECONDS.toHours(t*1000000L*60*60));
252	+	assertEquals(t,
253	+	TimeUnit.NANOSECONDS.toHours(t*1000000000L*60*60));
254	+	}
255	+	}
256	+
257	+	/**
258	+	* toDays correctly converts sample values in different units to
259	+	* days
260	+	*/
261	+	public void testToDays() {
262	+	for (long t = 0; t < 88888; ++t) {
263	+	assertEquals(t,
264	+	TimeUnit.DAYS.toDays(t));
265	+	assertEquals(t,
266	+	TimeUnit.HOURS.toDays(t*24));
267	+	assertEquals(t,
268	+	TimeUnit.MINUTES.toDays(t*60*24));
269	+	assertEquals(t,
270	+	TimeUnit.SECONDS.toDays(t*60*60*24));
271	+	assertEquals(t,
272	+	TimeUnit.MILLISECONDS.toDays(t*1000L*60*60*24));
273	+	assertEquals(t,
274	+	TimeUnit.MICROSECONDS.toDays(t*1000000L*60*60*24));
275	+	assertEquals(t,
276	+	TimeUnit.NANOSECONDS.toDays(t*1000000000L*60*60*24));
277	+	}
278	+	}
279	+
280	+	/**
281	+	* convert saturates positive too-large values to Long.MAX_VALUE
282	+	* and negative to LONG.MIN_VALUE
283	+	*/
284		public void testConvertSaturate() {
285		assertEquals(Long.MAX_VALUE,
286		TimeUnit.NANOSECONDS.convert(Long.MAX_VALUE / 2,
#	Line 96 | Line 288 | public class TimeUnitTest extends TestCa
288		assertEquals(Long.MIN_VALUE,
289		TimeUnit.NANOSECONDS.convert(-Long.MAX_VALUE / 4,
290		TimeUnit.SECONDS));
291	<
291	>	assertEquals(Long.MAX_VALUE,
292	>	TimeUnit.NANOSECONDS.convert(Long.MAX_VALUE / 2,
293	>	TimeUnit.MINUTES));
294	>	assertEquals(Long.MIN_VALUE,
295	>	TimeUnit.NANOSECONDS.convert(-Long.MAX_VALUE / 4,
296	>	TimeUnit.MINUTES));
297	>	assertEquals(Long.MAX_VALUE,
298	>	TimeUnit.NANOSECONDS.convert(Long.MAX_VALUE / 2,
299	>	TimeUnit.HOURS));
300	>	assertEquals(Long.MIN_VALUE,
301	>	TimeUnit.NANOSECONDS.convert(-Long.MAX_VALUE / 4,
302	>	TimeUnit.HOURS));
303	>	assertEquals(Long.MAX_VALUE,
304	>	TimeUnit.NANOSECONDS.convert(Long.MAX_VALUE / 2,
305	>	TimeUnit.DAYS));
306	>	assertEquals(Long.MIN_VALUE,
307	>	TimeUnit.NANOSECONDS.convert(-Long.MAX_VALUE / 4,
308	>	TimeUnit.DAYS));
309		}
310
311	+	/**
312	+	* toNanos saturates positive too-large values to Long.MAX_VALUE
313	+	* and negative to LONG.MIN_VALUE
314	+	*/
315		public void testToNanosSaturate() {
316	<	assertEquals(Long.MAX_VALUE,
317	<	TimeUnit.MILLISECONDS.toNanos(Long.MAX_VALUE / 2));
318	<	assertEquals(Long.MIN_VALUE,
319	<	TimeUnit.MILLISECONDS.toNanos(-Long.MAX_VALUE / 3));
107	<
316	>	assertEquals(Long.MAX_VALUE,
317	>	TimeUnit.MILLISECONDS.toNanos(Long.MAX_VALUE / 2));
318	>	assertEquals(Long.MIN_VALUE,
319	>	TimeUnit.MILLISECONDS.toNanos(-Long.MAX_VALUE / 3));
320		}
321
322	<
322	>	/**
323	>	* toString returns name of unit
324	>	*/
325		public void testToString() {
326	<	String s = TimeUnit.SECONDS.toString();
327	<	assertTrue(s.indexOf("econd") >= 0);
326	>	assertEquals("SECONDS", TimeUnit.SECONDS.toString());
327	>	}
328	>
329	>	/**
330	>	* name returns name of unit
331	>	*/
332	>	public void testName() {
333	>	assertEquals("SECONDS", TimeUnit.SECONDS.name());
334	>	}
335	>
336	>	/**
337	>	* Timed wait without holding lock throws
338	>	* IllegalMonitorStateException
339	>	*/
340	>	public void testTimedWait_IllegalMonitorException() throws Exception {
341	>	Thread t = new Thread(new CheckedRunnable() {
342	>	public void realRun() throws InterruptedException {
343	>	Object o = new Object();
344	>	TimeUnit tu = TimeUnit.MILLISECONDS;
345	>	try {
346	>	tu.timedWait(o,LONG_DELAY_MS);
347	>	threadShouldThrow();
348	>	} catch (IllegalMonitorStateException success) {}}});
349	>
350	>	t.start();
351	>	Thread.sleep(SHORT_DELAY_MS);
352	>	t.interrupt();
353	>	t.join();
354		}
355
116	–	// Exception tests
117	–
356		/**
357	<	*  This test specifically to catch the unreported exception
357	>	* timedWait throws InterruptedException when interrupted
358		*/
359	<	public void testTimedWaitForUnreportedIllegalMonitorException() {
360	<	//created a new thread with anonymous runnable
361	<
362	<	Thread t = new Thread(new Runnable() {
363	<	public void run() {
364	<	Object o = new Object();
365	<	TimeUnit tu = TimeUnit.MILLISECONDS;
366	<	try {
129	<	tu.timedWait(o,40000);
130	<	fail("should throw");
131	<	}
132	<	catch (InterruptedException ie) {
133	<	fail("should not throw IE here");
134	<	}
135	<	catch(IllegalMonitorStateException success) {
136	<	}
137	<
359	>	public void testTimedWait() throws InterruptedException {
360	>	Thread t = new Thread(new CheckedInterruptedRunnable() {
361	>	public void realRun() throws InterruptedException {
362	>	Object o = new Object();
363	>
364	>	TimeUnit tu = TimeUnit.MILLISECONDS;
365	>	synchronized (o) {
366	>	tu.timedWait(o,MEDIUM_DELAY_MS);
367		}
368	<	});
368	>	}});
369		t.start();
370	<	try {
371	<	Thread.sleep(100);
372	<	t.interrupt();
144	<	t.join();
145	<	} catch(Exception e) {
146	<	fail("Unexpected exception");
147	<	}
148	<	}
149	<
150	<	/**
151	<	*  Test to verify that timedWait will throw InterruptedException.
152	<	*  Thread t waits on timedWait while the main thread interrupts it.
153	<	*  Note:  This does not throw IllegalMonitorException since timeWait
154	<	*         is synchronized on o
155	<	*/
156	<	public void testTimedWait() {
157	<	Thread t = new Thread(new Runnable() {
158	<	public void run() {
159	<	Object o = new Object();
160	<
161	<	TimeUnit tu = TimeUnit.MILLISECONDS;
162	<	try {
163	<	synchronized(o) {
164	<	tu.timedWait(o,1000);
165	<	}
166	<	fail("should throw");
167	<	}
168	<	catch(InterruptedException success) {}
169	<	catch(IllegalMonitorStateException failure) {
170	<	fail("should not throw");
171	<	}
172	<	}
173	<	});
174	<	t.start();
175	<	try {
176	<	Thread.sleep(100);
177	<	t.interrupt();
178	<	t.join();
179	<	} catch(Exception e) {
180	<	fail("Unexpected exception");
181	<	}
182	<	}
183	<
184	<
185	<	/**
186	<	*  Test to verify that timedJoin will throw InterruptedException.
187	<	*  Thread t waits on timedJoin while the main thread interrupts it.
188	<	*/
189	<	public void testTimedJoin() {
190	<	Thread t = new Thread(new Runnable() {
191	<	public void run() {
192	<	TimeUnit tu = TimeUnit.MILLISECONDS;
193	<	try {
194	<	Thread s = new Thread(new Runnable() {
195	<	public void run() {
196	<	try{
197	<	Thread.sleep(1000);
198	<	}catch(InterruptedException success){}
199	<	}
200	<	});
201	<	s.start();
202	<	tu.timedJoin(s,1000);
203	<	fail("should throw");
204	<	}
205	<	catch(Exception e) {}
206	<	}
207	<	});
208	<	t.start();
209	<	try {
210	<	Thread.sleep(100);
211	<	t.interrupt();
212	<	t.join();
213	<	} catch(Exception e) {
214	<	fail("Unexpected exception");
215	<	}
216	<	}
217	<
218	<	/**
219	<	*  Test to verify that timedSleep will throw InterruptedException.
220	<	*  Thread t waits on timedSleep while the main thread interrupts it.
221	<	*/
222	<	public void testTimedSleep() {
223	<	//created a new thread with anonymous runnable
224	<
225	<	Thread t = new Thread(new Runnable() {
226	<	public void run() {
227	<	TimeUnit tu = TimeUnit.MILLISECONDS;
228	<	try {
229	<	tu.sleep(1000);
230	<	fail("should throw");
231	<	}
232	<	catch(InterruptedException success) {}
233	<	}
234	<	});
235	<	t.start();
236	<	try {
237	<	Thread.sleep(100);
238	<	t.interrupt();
239	<	t.join();
240	<	} catch(Exception e) {
241	<	fail("Unexpected exception");
242	<	}
370	>	Thread.sleep(SHORT_DELAY_MS);
371	>	t.interrupt();
372	>	t.join();
373		}
374	+
375	+	/**
376	+	* timedJoin throws InterruptedException when interrupted
377	+	*/
378	+	public void testTimedJoin() throws InterruptedException {
379	+	final Thread s = new Thread(new CheckedInterruptedRunnable() {
380	+	public void realRun() throws InterruptedException {
381	+	Thread.sleep(MEDIUM_DELAY_MS);
382	+	}});
383	+	final Thread t = new Thread(new CheckedInterruptedRunnable() {
384	+	public void realRun() throws InterruptedException {
385	+	TimeUnit tu = TimeUnit.MILLISECONDS;
386	+	tu.timedJoin(s, MEDIUM_DELAY_MS);
387	+	}});
388	+	s.start();
389	+	t.start();
390	+	Thread.sleep(SHORT_DELAY_MS);
391	+	t.interrupt();
392	+	t.join();
393	+	s.interrupt();
394	+	s.join();
395	+	}
396	+
397	+	/**
398	+	* timedSleep throws InterruptedException when interrupted
399	+	*/
400	+	public void testTimedSleep() throws InterruptedException {
401	+	Thread t = new Thread(new CheckedInterruptedRunnable() {
402	+	public void realRun() throws InterruptedException {
403	+	TimeUnit tu = TimeUnit.MILLISECONDS;
404	+	tu.sleep(MEDIUM_DELAY_MS);
405	+	}});
406	+
407	+	t.start();
408	+	Thread.sleep(SHORT_DELAY_MS);
409	+	t.interrupt();
410	+	t.join();
411	+	}
412	+
413	+	/**
414	+	* a deserialized serialized unit is the same instance
415	+	*/
416	+	public void testSerialization() throws Exception {
417	+	TimeUnit q = TimeUnit.MILLISECONDS;
418	+
419	+	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
420	+	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
421	+	out.writeObject(q);
422	+	out.close();
423	+
424	+	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
425	+	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
426	+	TimeUnit r = (TimeUnit)in.readObject();
427	+	assertSame(q, r);
428	+	}
429	+
430		}

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