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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 1.12 by jsr166, Sat Nov 21 02:33:20 2009 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/licenses/publicdomain
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());
36	>	final CountDownLatch l = new CountDownLatch(2);
37	>	assertEquals(2, l.getCount());
38	>	l.countDown();
39	>	assertEquals(1, l.getCount());
40		}
41
42		/**
43	<	*
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);
58	>	final CountDownLatch l = new CountDownLatch(2);
59
60	<	Thread t = new Thread(new Runnable() {
61	<	public void run() {
62	<	try {
63	<	l.await();
64	<	} catch(InterruptedException e){
60	>	Thread t = new Thread(new Runnable() {
61	>	public void run() {
62	>	try {
63	>	threadAssertTrue(l.getCount() > 0);
64	>	l.await();
65	>	threadAssertTrue(l.getCount() == 0);
66	>	} catch (InterruptedException e) {
67		threadUnexpectedException();
68		}
69	<	}
70	<	});
71	<	t.start();
72	<	try {
69	>	}
70	>	});
71	>	t.start();
72	>	try {
73		assertEquals(l.getCount(), 2);
74		Thread.sleep(SHORT_DELAY_MS);
75		l.countDown();
#	Line 61 | Line 77 | public class CountDownLatchTest extends
77		l.countDown();
78		assertEquals(l.getCount(), 0);
79		t.join();
80	<	} catch (InterruptedException e){
80	>	} catch (InterruptedException e) {
81		unexpectedException();
82		}
83		}
84	<
84	>
85
86		/**
87	<	*
87	>	* timed await returns after countDown to zero
88		*/
89		public void testTimedAwait() {
90	<	final CountDownLatch l = new CountDownLatch(2);
90	>	final CountDownLatch l = new CountDownLatch(2);
91
92	<	Thread t = new Thread(new Runnable() {
93	<	public void run() {
94	<	try {
95	<	threadAssertTrue(l.await(SMALL_DELAY_MS, TimeUnit.MILLISECONDS));
96	<	} catch(InterruptedException e){
92	>	Thread t = new Thread(new Runnable() {
93	>	public void run() {
94	>	try {
95	>	threadAssertTrue(l.getCount() > 0);
96	>	threadAssertTrue(l.await(SMALL_DELAY_MS, MILLISECONDS));
97	>	} catch (InterruptedException e) {
98		threadUnexpectedException();
99		}
100	<	}
101	<	});
102	<	t.start();
103	<	try {
100	>	}
101	>	});
102	>	t.start();
103	>	try {
104		assertEquals(l.getCount(), 2);
105		Thread.sleep(SHORT_DELAY_MS);
106		l.countDown();
#	Line 91 | Line 108 | public class CountDownLatchTest extends
108		l.countDown();
109		assertEquals(l.getCount(), 0);
110		t.join();
111	<	} catch (InterruptedException e){
111	>	} catch (InterruptedException e) {
112		unexpectedException();
113		}
114		}
98	–
99	–
100	–
115
116		/**
117	<	*
117	>	* await throws IE if interrupted before counted down
118		*/
119		public void testAwait_InterruptedException() {
120		final CountDownLatch l = new CountDownLatch(1);
121		Thread t = new Thread(new Runnable() {
122		public void run() {
123		try {
124	+	threadAssertTrue(l.getCount() > 0);
125		l.await();
126		threadShouldThrow();
127	<	} catch(InterruptedException success){}
127	>	} catch (InterruptedException success) {}
128		}
129		});
130	<	t.start();
131	<	try {
130	>	t.start();
131	>	try {
132		assertEquals(l.getCount(), 1);
133		t.interrupt();
134		t.join();
135	<	} catch (InterruptedException e){
135	>	} catch (InterruptedException e) {
136		unexpectedException();
137		}
138		}
139
140		/**
141	<	*
141	>	* timed await throws IE if interrupted before counted down
142		*/
143		public void testTimedAwait_InterruptedException() {
144		final CountDownLatch l = new CountDownLatch(1);
145		Thread t = new Thread(new Runnable() {
146		public void run() {
147		try {
148	<	l.await(MEDIUM_DELAY_MS, TimeUnit.MILLISECONDS);
149	<	threadShouldThrow();
150	<	} catch(InterruptedException success){}
148	>	threadAssertTrue(l.getCount() > 0);
149	>	l.await(MEDIUM_DELAY_MS, MILLISECONDS);
150	>	threadShouldThrow();
151	>	} catch (InterruptedException success) {}
152		}
153		});
154		t.start();
#	Line 141 | Line 157 | public class CountDownLatchTest extends
157		assertEquals(l.getCount(), 1);
158		t.interrupt();
159		t.join();
160	<	} catch (InterruptedException e){
160	>	} catch (InterruptedException e) {
161		unexpectedException();
162		}
163		}
164
165		/**
166	<	*
166	>	* timed await times out if not counted down before timeout
167		*/
168		public void testAwaitTimeout() {
169		final CountDownLatch l = new CountDownLatch(1);
170		Thread t = new Thread(new Runnable() {
171		public void run() {
172		try {
173	<	threadAssertFalse(l.await(SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
174	<	} catch(InterruptedException ie){
173	>	threadAssertTrue(l.getCount() > 0);
174	>	threadAssertFalse(l.await(SHORT_DELAY_MS, MILLISECONDS));
175	>	threadAssertTrue(l.getCount() > 0);
176	>	} catch (InterruptedException ie) {
177		threadUnexpectedException();
178		}
179		}
#	Line 164 | Line 182 | public class CountDownLatchTest extends
182		try {
183		assertEquals(l.getCount(), 1);
184		t.join();
185	<	} catch (InterruptedException e){
185	>	} catch (InterruptedException e) {
186		unexpectedException();
187		}
188		}
189
190	+	/**
191	+	* toString indicates current count
192	+	*/
193	+	public void testToString() {
194	+	CountDownLatch s = new CountDownLatch(2);
195	+	String us = s.toString();
196	+	assertTrue(us.indexOf("Count = 2") >= 0);
197	+	s.countDown();
198	+	String s1 = s.toString();
199	+	assertTrue(s1.indexOf("Count = 1") >= 0);
200	+	s.countDown();
201	+	String s2 = s.toString();
202	+	assertTrue(s2.indexOf("Count = 0") >= 0);
203	+	}
204	+
205		}

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