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

Comparing jsr166/src/test/tck/CountDownLatchTest.java (file contents):
Revision 1.1 by dl, Sun Aug 31 19:24:54 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 TestCase{
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		}
17	–
18	–
18		public static Test suite() {
19	<	return new TestSuite(CountDownLatchTest.class);
19	>	return new TestSuite(CountDownLatchTest.class);
20		}
21
22	<	private static long SHORT_DELAY_MS = 100;
23	<	private static long MEDIUM_DELAY_MS = 1000;
24	<	private static long LONG_DELAY_MS = 10000;
25	<
26	<	public void testGetCount(){
27	<	final CountDownLatch l = new CountDownLatch(2);
28	<	assertEquals(2, l.getCount());
29	<	l.countDown();
31	<	assertEquals(1, l.getCount());
32	<	}
33	<
34	<	public void testAwait1(){
35	<	final CountDownLatch l = new CountDownLatch(2);
36	<
37	<	Thread t = new Thread(new Runnable(){
38	<	public void run(){
39	<	try{
40	<	l.await();
41	<	}catch(InterruptedException e){
42	<	fail("unexpected exception");
43	<	}
44	<	}
45	<	});
46	<	t.start();
47	<	try{
48	<	assertEquals(l.getCount(), 2);
49	<	Thread.sleep(SHORT_DELAY_MS);
50	<	l.countDown();
51	<	assertEquals(l.getCount(), 1);
52	<	l.countDown();
53	<	assertEquals(l.getCount(), 0);
54	<	t.join();
55	<	}catch (InterruptedException e){
56	<	fail("unexpected exception");
57	<	}
22	>	/**
23	>	* negative constructor argument throws IAE
24	>	*/
25	>	public void testConstructor() {
26	>	try {
27	>	new CountDownLatch(-1);
28	>	shouldThrow();
29	>	} catch (IllegalArgumentException success) {}
30		}
59	–
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());
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	+	assertTrue(l.getCount() > 0);
63	+	l.await();
64	+	assertEquals(0, l.getCount());
65	+	}});
66
67	<	public void testConstructor(){
68	<	try{
69	<	new CountDownLatch(-1);
70	<	fail("should throw IllegalArgumentException");
71	<	}catch(IllegalArgumentException success){}
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	>
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	>	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
100	<	public void testAwait1_InterruptedException(){
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	<	fail("should throw");
110	<	}catch(InterruptedException success){}
111	<	}
112	<	});
113	<	t.start();
114	<	try{
81	<	assertEquals(l.getCount(), 1);
82	<	t.interrupt();
83	<	t.join();
84	<	}catch (InterruptedException e){
85	<	fail("unexpected exception");
86	<	}
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	<	public void testAwait2_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	<	fail("should throw");
127	<	}catch(InterruptedException success){}
97	<	}
98	<	});
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();
104	<	t.join();
105	<	}catch (InterruptedException e){
106	<	fail("unexpected exception");
107	<	}
129	>	delay(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	<	assertFalse(l.await(SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
144	<	}catch(InterruptedException ie){
145	<	fail("unexpected exception");
146	<	}
119	<	}
120	<	});
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	<	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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