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

Comparing jsr166/src/test/tck/CountDownLatchTest.java (file contents):
Revision 1.3 by dl, Sat Sep 20 18:20:07 2003 UTC vs.
Revision 1.16 by jsr166, Tue Mar 15 19:47:06 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		/**
23	<	*
23	>	* negative constructor argument throws IAE
24		*/
25		public void testConstructor() {
26		try {
27		new CountDownLatch(-1);
28		shouldThrow();
29	<	} catch(IllegalArgumentException success){}
29	>	} catch (IllegalArgumentException success) {}
30		}
31
32		/**
33	<	*
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());
38	<	}
39	<
40	<	/**
41	<	*
42	<	*/
43	<	public void testAwait() {
44	<	final CountDownLatch l = new CountDownLatch(2);
45	<
46	<	Thread t = new Thread(new Runnable() {
47	<	public void run() {
48	<	try {
49	<	l.await();
50	<	} catch(InterruptedException e){
51	<	threadUnexpectedException();
52	<	}
53	<	}
54	<	});
55	<	t.start();
56	<	try {
57	<	assertEquals(l.getCount(), 2);
58	<	Thread.sleep(SHORT_DELAY_MS);
59	<	l.countDown();
60	<	assertEquals(l.getCount(), 1);
61	<	l.countDown();
62	<	assertEquals(l.getCount(), 0);
63	<	t.join();
64	<	} catch (InterruptedException e){
65	<	unexpectedException();
66	<	}
67	<	}
68	<
69	<
70	<	/**
71	<	*
72	<	*/
73	<	public void testTimedAwait() {
74	<	final CountDownLatch l = new CountDownLatch(2);
75	<
76	<	Thread t = new Thread(new Runnable() {
77	<	public void run() {
78	<	try {
79	<	threadAssertTrue(l.await(SMALL_DELAY_MS, TimeUnit.MILLISECONDS));
80	<	} catch(InterruptedException e){
81	<	threadUnexpectedException();
82	<	}
83	<	}
84	<	});
85	<	t.start();
86	<	try {
87	<	assertEquals(l.getCount(), 2);
88	<	Thread.sleep(SHORT_DELAY_MS);
89	<	l.countDown();
90	<	assertEquals(l.getCount(), 1);
91	<	l.countDown();
92	<	assertEquals(l.getCount(), 0);
93	<	t.join();
94	<	} catch (InterruptedException e){
95	<	unexpectedException();
96	<	}
36	>	final CountDownLatch l = new CountDownLatch(2);
37	>	assertEquals(2, l.getCount());
38	>	l.countDown();
39	>	assertEquals(1, l.getCount());
40		}
98	–
41
42	+	/**
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() 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	+	t.start();
68	+	assertEquals(l.getCount(), 2);
69	+	Thread.sleep(SHORT_DELAY_MS);
70	+	l.countDown();
71	+	assertEquals(l.getCount(), 1);
72	+	l.countDown();
73	+	assertEquals(l.getCount(), 0);
74	+	t.join();
75	+	}
76	+
77	+
78	+	/**
79	+	* timed await returns after countDown to zero
80	+	*/
81	+	public void testTimedAwait() throws InterruptedException {
82	+	final CountDownLatch l = new CountDownLatch(2);
83	+
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	+	Thread.sleep(SHORT_DELAY_MS);
93	+	l.countDown();
94	+	assertEquals(l.getCount(), 1);
95	+	l.countDown();
96	+	assertEquals(l.getCount(), 0);
97	+	t.join();
98	+	}
99
100		/**
101	<	*
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	<	l.await();
109	<	threadShouldThrow();
110	<	} catch(InterruptedException success){}
111	<	}
112	<	});
113	<	t.start();
114	<	try {
117	<	assertEquals(l.getCount(), 1);
118	<	t.interrupt();
119	<	t.join();
120	<	} catch (InterruptedException e){
121	<	unexpectedException();
122	<	}
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	<	*
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	<	l.await(MEDIUM_DELAY_MS, TimeUnit.MILLISECONDS);
126	<	threadShouldThrow();
127	<	} catch(InterruptedException success){}
136	<	}
137	<	});
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();
143	<	t.join();
144	<	} catch (InterruptedException e){
145	<	unexpectedException();
146	<	}
129	>	Thread.sleep(SHORT_DELAY_MS);
130	>	assertEquals(l.getCount(), 1);
131	>	t.interrupt();
132	>	t.join();
133		}
134
135		/**
136	<	*
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	<	threadAssertFalse(l.await(SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
144	<	} catch(InterruptedException ie){
145	<	threadUnexpectedException();
146	<	}
161	<	}
162	<	});
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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