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

Comparing jsr166/src/test/tck/CountDownLatchTest.java (file contents):
Revision 1.2 by dl, Sun Sep 14 20:42:40 2003 UTC vs.
Revision 1.14 by jsr166, Wed Aug 25 00:07:03 2010 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	<	public void testConstructor(){
22	>	/**
23	>	* negative constructor argument throws IAE
24	>	*/
25	>	public void testConstructor() {
26		try {
27		new CountDownLatch(-1);
28	<	fail("should throw IllegalArgumentException");
29	<	} catch(IllegalArgumentException success){}
28	>	shouldThrow();
29	>	} catch (IllegalArgumentException success) {}
30		}
31
32	<	public void testGetCount(){
33	<	final CountDownLatch l = new CountDownLatch(2);
34	<	assertEquals(2, l.getCount());
35	<	l.countDown();
36	<	assertEquals(1, l.getCount());
37	<	}
38	<
39	<	public void testAwait(){
40	<	final CountDownLatch l = new CountDownLatch(2);
41	<
42	<	Thread t = new Thread(new Runnable(){
43	<	public void run(){
44	<	try {
45	<	l.await();
46	<	} catch(InterruptedException e){
47	<	threadFail("unexpected exception");
48	<	}
49	<	}
50	<	});
51	<	t.start();
52	<	try {
53	<	assertEquals(l.getCount(), 2);
54	<	Thread.sleep(SHORT_DELAY_MS);
55	<	l.countDown();
56	<	assertEquals(l.getCount(), 1);
57	<	l.countDown();
58	<	assertEquals(l.getCount(), 0);
59	<	t.join();
60	<	} catch (InterruptedException e){
61	<	fail("unexpected exception");
62	<	}
63	<	}
64	<
65	<
66	<	public void testTimedAwait(){
67	<	final CountDownLatch l = new CountDownLatch(2);
68	<
69	<	Thread t = new Thread(new Runnable(){
70	<	public void run(){
71	<	try {
72	<	threadAssertTrue(l.await(SMALL_DELAY_MS, TimeUnit.MILLISECONDS));
73	<	} catch(InterruptedException e){
74	<	threadFail("unexpected exception");
70	<	}
71	<	}
72	<	});
73	<	t.start();
74	<	try {
75	<	assertEquals(l.getCount(), 2);
76	<	Thread.sleep(SHORT_DELAY_MS);
77	<	l.countDown();
78	<	assertEquals(l.getCount(), 1);
79	<	l.countDown();
80	<	assertEquals(l.getCount(), 0);
81	<	t.join();
82	<	} catch (InterruptedException e){
83	<	fail("unexpected exception");
84	<	}
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());
40	>	}
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	>	threadAssertTrue(l.getCount() > 0);
63	>	l.await();
64	>	threadAssertTrue(l.getCount() == 0);
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		}
86	–
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	+	threadAssertTrue(l.getCount() > 0);
87	+	threadAssertTrue(l.await(SMALL_DELAY_MS, MILLISECONDS));
88	+	}});
89
90	<	public void testAwait_InterruptedException(){
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	>	* await throws IE if interrupted before counted down
102	>	*/
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	<	threadFail("should throw");
110	<	} catch(InterruptedException success){}
111	<	}
112	<	});
113	<	t.start();
114	<	try {
102	<	assertEquals(l.getCount(), 1);
103	<	t.interrupt();
104	<	t.join();
105	<	} catch (InterruptedException e){
106	<	fail("unexpected exception");
107	<	}
105	>	Thread t = new Thread(new CheckedInterruptedRunnable() {
106	>	public void realRun() throws InterruptedException {
107	>	threadAssertTrue(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	<	public void testTimedAwait_InterruptedException(){
117	>	/**
118	>	* timed await throws IE if interrupted before counted down
119	>	*/
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	<	threadFail("should throw");
127	<	} catch(InterruptedException success){}
118	<	}
119	<	});
122	>	Thread t = new Thread(new CheckedInterruptedRunnable() {
123	>	public void realRun() throws InterruptedException {
124	>	threadAssertTrue(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();
125	<	t.join();
126	<	} catch (InterruptedException e){
127	<	fail("unexpected exception");
128	<	}
129	>	Thread.sleep(SHORT_DELAY_MS);
130	>	assertEquals(l.getCount(), 1);
131	>	t.interrupt();
132	>	t.join();
133		}
134
135	<	public void testAwaitTimeout(){
135	>	/**
136	>	* timed await times out if not counted down before timeout
137	>	*/
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	<	threadFail("unexpected exception");
146	<	}
140	<	}
141	<	});
140	>	Thread t = new Thread(new CheckedRunnable() {
141	>	public void realRun() throws InterruptedException {
142	>	threadAssertTrue(l.getCount() > 0);
143	>	threadAssertFalse(l.await(SHORT_DELAY_MS, MILLISECONDS));
144	>	threadAssertTrue(l.getCount() > 0);
145	>	}});
146	>
147		t.start();
148	<	try {
149	<	assertEquals(l.getCount(), 1);
150	<	t.join();
151	<	} catch (InterruptedException e){
152	<	fail("unexpected exception");
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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