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root/jsr166/jsr166/src/test/tck/CountDownLatchTest.java

Comparing jsr166/src/test/tck/CountDownLatchTest.java (file contents):
Revision 1.4 by dl, Thu Sep 25 11:02:41 2003 UTC vs.
Revision 1.17 by dl, Fri May 6 11:22:07 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
9		import junit.framework.*;
10		import java.util.*;
11		import java.util.concurrent.*;
12	+	import static java.util.concurrent.TimeUnit.MILLISECONDS;
13
14		public class CountDownLatchTest extends JSR166TestCase {
15		public static void main(String[] args) {
16	<	junit.textui.TestRunner.run (suite());
16	>	junit.textui.TestRunner.run(suite());
17		}
18		public static Test suite() {
19	<	return new TestSuite(CountDownLatchTest.class);
19	>	return new TestSuite(CountDownLatchTest.class);
20		}
21
22		/**
#	Line 24 | Line 26 | public class CountDownLatchTest extends
26		try {
27		new CountDownLatch(-1);
28		shouldThrow();
29	<	} catch(IllegalArgumentException success){}
29	>	} catch (IllegalArgumentException success) {}
30		}
31
32		/**
33		* getCount returns initial count and decreases after countDown
34		*/
35		public void testGetCount() {
36	<	final CountDownLatch l = new CountDownLatch(2);
37	<	assertEquals(2, l.getCount());
38	<	l.countDown();
39	<	assertEquals(1, l.getCount());
36	>	final CountDownLatch l = new CountDownLatch(2);
37	>	assertEquals(2, l.getCount());
38	>	l.countDown();
39	>	assertEquals(1, l.getCount());
40		}
41
42		/**
43	<	* countDown has no effect when count is zero
44	<	*/
45	<	public void testcountDown() {
46	<	final CountDownLatch l = new CountDownLatch(1);
47	<	assertEquals(1, l.getCount());
48	<	l.countDown();
49	<	assertEquals(0, l.getCount());
50	<	l.countDown();
51	<	assertEquals(0, l.getCount());
43	>	* countDown decrements count when positive and has no effect when zero
44	>	*/
45	>	public void testCountDown() {
46	>	final CountDownLatch l = new CountDownLatch(1);
47	>	assertEquals(1, l.getCount());
48	>	l.countDown();
49	>	assertEquals(0, l.getCount());
50	>	l.countDown();
51	>	assertEquals(0, l.getCount());
52		}
53
54		/**
55		* await returns after countDown to zero, but not before
56		*/
57	<	public void testAwait() {
58	<	final CountDownLatch l = new CountDownLatch(2);
57	>	public void testAwait() throws InterruptedException {
58	>	final CountDownLatch l = new CountDownLatch(2);
59	>
60	>	Thread t = new Thread(new CheckedRunnable() {
61	>	public void realRun() throws InterruptedException {
62	>	assertTrue(l.getCount() > 0);
63	>	l.await();
64	>	assertEquals(0, l.getCount());
65	>	}});
66
67	<	Thread t = new Thread(new Runnable() {
68	<	public void run() {
69	<	try {
70	<	threadAssertTrue(l.getCount() > 0);
71	<	l.await();
72	<	threadAssertTrue(l.getCount() == 0);
73	<	} catch(InterruptedException e){
74	<	threadUnexpectedException();
66	<	}
67	<	}
68	<	});
69	<	t.start();
70	<	try {
71	<	assertEquals(l.getCount(), 2);
72	<	Thread.sleep(SHORT_DELAY_MS);
73	<	l.countDown();
74	<	assertEquals(l.getCount(), 1);
75	<	l.countDown();
76	<	assertEquals(l.getCount(), 0);
77	<	t.join();
78	<	} catch (InterruptedException e){
79	<	unexpectedException();
80	<	}
67	>	t.start();
68	>	assertEquals(l.getCount(), 2);
69	>	delay(SHORT_DELAY_MS);
70	>	l.countDown();
71	>	assertEquals(l.getCount(), 1);
72	>	l.countDown();
73	>	assertEquals(l.getCount(), 0);
74	>	t.join();
75		}
76	<
76	>
77
78		/**
79		* timed await returns after countDown to zero
80		*/
81	<	public void testTimedAwait() {
82	<	final CountDownLatch l = new CountDownLatch(2);
81	>	public void testTimedAwait() throws InterruptedException {
82	>	final CountDownLatch l = new CountDownLatch(2);
83
84	<	Thread t = new Thread(new Runnable() {
85	<	public void run() {
86	<	try {
87	<	threadAssertTrue(l.getCount() > 0);
88	<	threadAssertTrue(l.await(SMALL_DELAY_MS, TimeUnit.MILLISECONDS));
89	<	} catch(InterruptedException e){
90	<	threadUnexpectedException();
91	<	}
92	<	}
93	<	});
94	<	t.start();
95	<	try {
96	<	assertEquals(l.getCount(), 2);
97	<	Thread.sleep(SHORT_DELAY_MS);
104	<	l.countDown();
105	<	assertEquals(l.getCount(), 1);
106	<	l.countDown();
107	<	assertEquals(l.getCount(), 0);
108	<	t.join();
109	<	} catch (InterruptedException e){
110	<	unexpectedException();
111	<	}
84	>	Thread t = new Thread(new CheckedRunnable() {
85	>	public void realRun() throws InterruptedException {
86	>	assertTrue(l.getCount() > 0);
87	>	assertTrue(l.await(SMALL_DELAY_MS, MILLISECONDS));
88	>	}});
89	>
90	>	t.start();
91	>	assertEquals(l.getCount(), 2);
92	>	delay(SHORT_DELAY_MS);
93	>	l.countDown();
94	>	assertEquals(l.getCount(), 1);
95	>	l.countDown();
96	>	assertEquals(l.getCount(), 0);
97	>	t.join();
98		}
99	<
99	>
100		/**
101	<	* await throws IE ig interrupted before counted down
101	>	* await throws IE if interrupted before counted down
102		*/
103	<	public void testAwait_InterruptedException() {
103	>	public void testAwait_InterruptedException() throws InterruptedException {
104		final CountDownLatch l = new CountDownLatch(1);
105	<	Thread t = new Thread(new Runnable() {
106	<	public void run() {
107	<	try {
108	<	threadAssertTrue(l.getCount() > 0);
109	<	l.await();
110	<	threadShouldThrow();
111	<	} catch(InterruptedException success){}
112	<	}
113	<	});
114	<	t.start();
129	<	try {
130	<	assertEquals(l.getCount(), 1);
131	<	t.interrupt();
132	<	t.join();
133	<	} catch (InterruptedException e){
134	<	unexpectedException();
135	<	}
105	>	Thread t = new Thread(new CheckedInterruptedRunnable() {
106	>	public void realRun() throws InterruptedException {
107	>	assertTrue(l.getCount() > 0);
108	>	l.await();
109	>	}});
110	>
111	>	t.start();
112	>	assertEquals(l.getCount(), 1);
113	>	t.interrupt();
114	>	t.join();
115		}
116
117		/**
118	<	* timed await throws IE ig interrupted before counted down
118	>	* timed await throws IE if interrupted before counted down
119		*/
120	<	public void testTimedAwait_InterruptedException() {
120	>	public void testTimedAwait_InterruptedException() throws InterruptedException {
121		final CountDownLatch l = new CountDownLatch(1);
122	<	Thread t = new Thread(new Runnable() {
123	<	public void run() {
124	<	try {
125	<	threadAssertTrue(l.getCount() > 0);
126	<	l.await(MEDIUM_DELAY_MS, TimeUnit.MILLISECONDS);
127	<	threadShouldThrow();
149	<	} catch(InterruptedException success){}
150	<	}
151	<	});
122	>	Thread t = new Thread(new CheckedInterruptedRunnable() {
123	>	public void realRun() throws InterruptedException {
124	>	assertTrue(l.getCount() > 0);
125	>	l.await(MEDIUM_DELAY_MS, MILLISECONDS);
126	>	}});
127	>
128		t.start();
129	<	try {
130	<	Thread.sleep(SHORT_DELAY_MS);
131	<	assertEquals(l.getCount(), 1);
132	<	t.interrupt();
157	<	t.join();
158	<	} catch (InterruptedException e){
159	<	unexpectedException();
160	<	}
129	>	delay(SHORT_DELAY_MS);
130	>	assertEquals(l.getCount(), 1);
131	>	t.interrupt();
132	>	t.join();
133		}
134
135		/**
136		* timed await times out if not counted down before timeout
137		*/
138	<	public void testAwaitTimeout() {
138	>	public void testAwaitTimeout() throws InterruptedException {
139		final CountDownLatch l = new CountDownLatch(1);
140	<	Thread t = new Thread(new Runnable() {
141	<	public void run() {
142	<	try {
143	<	threadAssertTrue(l.getCount() > 0);
144	<	threadAssertFalse(l.await(SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
145	<	threadAssertTrue(l.getCount() > 0);
146	<	} catch(InterruptedException ie){
175	<	threadUnexpectedException();
176	<	}
177	<	}
178	<	});
140	>	Thread t = new Thread(new CheckedRunnable() {
141	>	public void realRun() throws InterruptedException {
142	>	assertTrue(l.getCount() > 0);
143	>	assertFalse(l.await(SHORT_DELAY_MS, MILLISECONDS));
144	>	assertTrue(l.getCount() > 0);
145	>	}});
146	>
147		t.start();
148	<	try {
149	<	assertEquals(l.getCount(), 1);
150	<	t.join();
151	<	} catch (InterruptedException e){
152	<	unexpectedException();
153	<	}
148	>	assertEquals(l.getCount(), 1);
149	>	t.join();
150	>	}
151	>
152	>	/**
153	>	* toString indicates current count
154	>	*/
155	>	public void testToString() {
156	>	CountDownLatch s = new CountDownLatch(2);
157	>	String us = s.toString();
158	>	assertTrue(us.indexOf("Count = 2") >= 0);
159	>	s.countDown();
160	>	String s1 = s.toString();
161	>	assertTrue(s1.indexOf("Count = 1") >= 0);
162	>	s.countDown();
163	>	String s2 = s.toString();
164	>	assertTrue(s2.indexOf("Count = 0") >= 0);
165		}
166
167		}

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