test/tck/SynchronousQueueTest.java

/*
 * Written by Doug Lea with assistance from members of JCP JSR-166
 * Expert Group and released to the public domain, as explained at
 * http://creativecommons.org/licenses/publicdomain
 * Other contributors include Andrew Wright, Jeffrey Hayes,
 * Pat Fisher, Mike Judd.
 */

import junit.framework.*;
import java.util.*;
import java.util.concurrent.*;
import static java.util.concurrent.TimeUnit.MILLISECONDS;
import java.io.*;

public class SynchronousQueueTest extends JSR166TestCase {

    public static class Fair extends BlockingQueueTest {
        protected BlockingQueue emptyCollection() {
            return new SynchronousQueue(true);
        }
    }

    public static class NonFair extends BlockingQueueTest {
        protected BlockingQueue emptyCollection() {
            return new SynchronousQueue(false);
        }
    }

    public static void main(String[] args) {
        junit.textui.TestRunner.run(suite());
    }

    public static Test suite() {
        return newTestSuite(SynchronousQueueTest.class,
                            new Fair().testSuite(),
                            new NonFair().testSuite());
    }

    /**
     * A SynchronousQueue is both empty and full
     */
    public void testEmptyFull() {
        SynchronousQueue q = new SynchronousQueue();
        assertTrue(q.isEmpty());
        assertEquals(0, q.size());
        assertEquals(0, q.remainingCapacity());
        assertFalse(q.offer(zero));
    }

    /**
     * A fair SynchronousQueue is both empty and full
     */
    public void testFairEmptyFull() {
        SynchronousQueue q = new SynchronousQueue(true);
        assertTrue(q.isEmpty());
        assertEquals(0, q.size());
        assertEquals(0, q.remainingCapacity());
        assertFalse(q.offer(zero));
    }

    /**
     * offer(null) throws NPE
     */
    public void testOfferNull() {
        try {
            SynchronousQueue q = new SynchronousQueue();
            q.offer(null);
            shouldThrow();
        } catch (NullPointerException success) {}
    }

    /**
     * add(null) throws NPE
     */
    public void testAddNull() {
        try {
            SynchronousQueue q = new SynchronousQueue();
            q.add(null);
            shouldThrow();
        } catch (NullPointerException success) {}
    }

    /**
     * offer fails if no active taker
     */
    public void testOffer() {
        SynchronousQueue q = new SynchronousQueue();
        assertFalse(q.offer(one));
    }

    /**
     * add throws ISE if no active taker
     */
    public void testAdd() {
        try {
            SynchronousQueue q = new SynchronousQueue();
            assertEquals(0, q.remainingCapacity());
            q.add(one);
            shouldThrow();
        } catch (IllegalStateException success) {}
    }

    /**
     * addAll(null) throws NPE
     */
    public void testAddAll1() {
        try {
            SynchronousQueue q = new SynchronousQueue();
            q.addAll(null);
            shouldThrow();
        } catch (NullPointerException success) {}
    }

    /**
     * addAll(this) throws IAE
     */
    public void testAddAllSelf() {
        try {
            SynchronousQueue q = new SynchronousQueue();
            q.addAll(q);
            shouldThrow();
        } catch (IllegalArgumentException success) {}
    }

    /**
     * addAll of a collection with null elements throws NPE
     */
    public void testAddAll2() {
        try {
            SynchronousQueue q = new SynchronousQueue();
            Integer[] ints = new Integer[1];
            q.addAll(Arrays.asList(ints));
            shouldThrow();
        } catch (NullPointerException success) {}
    }

    /**
     * addAll throws ISE if no active taker
     */
    public void testAddAll4() {
        try {
            SynchronousQueue q = new SynchronousQueue();
            Integer[] ints = new Integer[1];
            for (int i = 0; i < 1; ++i)
                ints[i] = new Integer(i);
            q.addAll(Arrays.asList(ints));
            shouldThrow();
        } catch (IllegalStateException success) {}
    }

    /**
     * put(null) throws NPE
     */
    public void testPutNull() throws InterruptedException {
        try {
            SynchronousQueue q = new SynchronousQueue();
            q.put(null);
            shouldThrow();
        } catch (NullPointerException success) {}
     }

    /**
     * put blocks interruptibly if no active taker
     */
    public void testBlockingPut() throws InterruptedException {
        Thread t = new Thread(new CheckedInterruptedRunnable() {
            public void realRun() throws InterruptedException {
                SynchronousQueue q = new SynchronousQueue();
                q.put(zero);
            }});

        t.start();
        Thread.sleep(SHORT_DELAY_MS);
        t.interrupt();
        t.join();
    }

    /**
     * put blocks waiting for take
     */
    public void testPutWithTake() throws InterruptedException {
        final SynchronousQueue q = new SynchronousQueue();
        Thread t = new Thread(new CheckedRunnable() {
            public void realRun() throws InterruptedException {
                int added = 0;
                try {
                    while (true) {
                        q.put(added);
                        ++added;
                    }
                } catch (InterruptedException success) {
                    assertEquals(1, added);
                }
            }});

        t.start();
        Thread.sleep(SHORT_DELAY_MS);
        assertEquals(0, q.take());
        Thread.sleep(SHORT_DELAY_MS);
        t.interrupt();
        t.join();
    }

    /**
     * timed offer times out if elements not taken
     */
    public void testTimedOffer() throws InterruptedException {
        final SynchronousQueue q = new SynchronousQueue();
        Thread t = new Thread(new CheckedInterruptedRunnable() {
            public void realRun() throws InterruptedException {
                assertFalse(q.offer(new Object(), SHORT_DELAY_MS, MILLISECONDS));
                q.offer(new Object(), LONG_DELAY_MS, MILLISECONDS);
            }});

        t.start();
        Thread.sleep(SMALL_DELAY_MS);
        t.interrupt();
        t.join();
    }


    /**
     * take blocks interruptibly when empty
     */
    public void testTakeFromEmpty() throws InterruptedException {
        final SynchronousQueue q = new SynchronousQueue();
        Thread t = new Thread(new CheckedInterruptedRunnable() {
            public void realRun() throws InterruptedException {
                q.take();
            }});

        t.start();
        Thread.sleep(SHORT_DELAY_MS);
        t.interrupt();
        t.join();
    }


    /**
     * put blocks interruptibly if no active taker
     */
    public void testFairBlockingPut() throws InterruptedException {
        Thread t = new Thread(new CheckedInterruptedRunnable() {
            public void realRun() throws InterruptedException {
                SynchronousQueue q = new SynchronousQueue(true);
                q.put(zero);
            }});

        t.start();
        Thread.sleep(SHORT_DELAY_MS);
        t.interrupt();
        t.join();
    }

    /**
     * put blocks waiting for take
     */
    public void testFairPutWithTake() throws InterruptedException {
        final SynchronousQueue q = new SynchronousQueue(true);
        Thread t = new Thread(new CheckedRunnable() {
            public void realRun() throws InterruptedException {
                int added = 0;
                try {
                    while (true) {
                        q.put(added);
                        ++added;
                    }
                } catch (InterruptedException success) {
                    assertEquals(1, added);
                }
            }});

        t.start();
        Thread.sleep(SHORT_DELAY_MS);
        assertEquals(0, q.take());
        Thread.sleep(SHORT_DELAY_MS);
        t.interrupt();
        t.join();
    }

    /**
     * timed offer times out if elements not taken
     */
    public void testFairTimedOffer() throws InterruptedException {
        final SynchronousQueue q = new SynchronousQueue(true);
        Thread t = new Thread(new CheckedInterruptedRunnable() {
            public void realRun() throws InterruptedException {
                assertFalse(q.offer(new Object(), SHORT_DELAY_MS, MILLISECONDS));
                q.offer(new Object(), LONG_DELAY_MS, MILLISECONDS);
            }});

        t.start();
        Thread.sleep(SMALL_DELAY_MS);
        t.interrupt();
        t.join();
    }


    /**
     * take blocks interruptibly when empty
     */
    public void testFairTakeFromEmpty() throws InterruptedException {
        final SynchronousQueue q = new SynchronousQueue(true);
        Thread t = new Thread(new CheckedInterruptedRunnable() {
            public void realRun() throws InterruptedException {
                q.take();
            }});

        t.start();
        Thread.sleep(SHORT_DELAY_MS);
        t.interrupt();
        t.join();
    }

    /**
     * poll fails unless active taker
     */
    public void testPoll() {
        SynchronousQueue q = new SynchronousQueue();
        assertNull(q.poll());
    }

    /**
     * timed pool with zero timeout times out if no active taker
     */
    public void testTimedPoll0() throws InterruptedException {
        SynchronousQueue q = new SynchronousQueue();
        assertNull(q.poll(0, MILLISECONDS));
    }

    /**
     * timed pool with nonzero timeout times out if no active taker
     */
    public void testTimedPoll() throws InterruptedException {
        SynchronousQueue q = new SynchronousQueue();
        assertNull(q.poll(SHORT_DELAY_MS, MILLISECONDS));
    }

    /**
     * Interrupted timed poll throws InterruptedException instead of
     * returning timeout status
     */
    public void testInterruptedTimedPoll() throws InterruptedException {
        final SynchronousQueue q = new SynchronousQueue();
        Thread t = new Thread(new CheckedInterruptedRunnable() {
            public void realRun() throws InterruptedException {
                q.poll(SMALL_DELAY_MS, MILLISECONDS);
            }});

        t.start();
        Thread.sleep(SHORT_DELAY_MS);
        t.interrupt();
        t.join();
    }

    /**
     * Interrupted timed poll throws InterruptedException instead of
     * returning timeout status
     */
    public void testFairInterruptedTimedPoll() throws InterruptedException {
        Thread t = new Thread(new CheckedInterruptedRunnable() {
            public void realRun() throws InterruptedException {
                SynchronousQueue q = new SynchronousQueue(true);
                q.poll(SMALL_DELAY_MS, MILLISECONDS);
            }});

        t.start();
        Thread.sleep(SHORT_DELAY_MS);
        t.interrupt();
        t.join();
    }

    /**
     * timed poll before a delayed offer fails; after offer succeeds;
     * on interruption throws
     */
    public void testFairTimedPollWithOffer() throws InterruptedException {
        final SynchronousQueue q = new SynchronousQueue(true);
        Thread t = new Thread(new CheckedRunnable() {
            public void realRun() throws InterruptedException {
                try {
                    assertNull(q.poll(SHORT_DELAY_MS, MILLISECONDS));
                    assertSame(zero, q.poll(LONG_DELAY_MS, MILLISECONDS));
                    q.poll(LONG_DELAY_MS, MILLISECONDS);
                    threadShouldThrow();
                } catch (InterruptedException success) {}
            }});

        t.start();
        Thread.sleep(SMALL_DELAY_MS);
        assertTrue(q.offer(zero, SHORT_DELAY_MS, MILLISECONDS));
        t.interrupt();
        t.join();
    }


    /**
     * peek returns null
     */
    public void testPeek() {
        SynchronousQueue q = new SynchronousQueue();
        assertNull(q.peek());
    }

    /**
     * element throws NSEE
     */
    public void testElement() {
        SynchronousQueue q = new SynchronousQueue();
        try {
            q.element();
            shouldThrow();
        } catch (NoSuchElementException success) {}
    }

    /**
     * remove throws NSEE if no active taker
     */
    public void testRemove() {
        SynchronousQueue q = new SynchronousQueue();
        try {
            q.remove();
            shouldThrow();
        } catch (NoSuchElementException success) {}
    }

    /**
     * remove(x) returns false
     */
    public void testRemoveElement() {
        SynchronousQueue q = new SynchronousQueue();
        assertFalse(q.remove(zero));
        assertTrue(q.isEmpty());
    }

    /**
     * contains returns false
     */
    public void testContains() {
        SynchronousQueue q = new SynchronousQueue();
        assertFalse(q.contains(zero));
    }

    /**
     * clear ensures isEmpty
     */
    public void testClear() {
        SynchronousQueue q = new SynchronousQueue();
        q.clear();
        assertTrue(q.isEmpty());
    }

    /**
     * containsAll returns false unless empty
     */
    public void testContainsAll() {
        SynchronousQueue q = new SynchronousQueue();
        Integer[] empty = new Integer[0];
        assertTrue(q.containsAll(Arrays.asList(empty)));
        Integer[] ints = new Integer[1]; ints[0] = zero;
        assertFalse(q.containsAll(Arrays.asList(ints)));
    }

    /**
     * retainAll returns false
     */
    public void testRetainAll() {
        SynchronousQueue q = new SynchronousQueue();
        Integer[] empty = new Integer[0];
        assertFalse(q.retainAll(Arrays.asList(empty)));
        Integer[] ints = new Integer[1]; ints[0] = zero;
        assertFalse(q.retainAll(Arrays.asList(ints)));
    }

    /**
     * removeAll returns false
     */
    public void testRemoveAll() {
        SynchronousQueue q = new SynchronousQueue();
        Integer[] empty = new Integer[0];
        assertFalse(q.removeAll(Arrays.asList(empty)));
        Integer[] ints = new Integer[1]; ints[0] = zero;
        assertFalse(q.containsAll(Arrays.asList(ints)));
    }


    /**
     * toArray is empty
     */
    public void testToArray() {
        SynchronousQueue q = new SynchronousQueue();
        Object[] o = q.toArray();
        assertEquals(o.length, 0);
    }

    /**
     * toArray(a) is nulled at position 0
     */
    public void testToArray2() {
        SynchronousQueue q = new SynchronousQueue();
        Integer[] ints = new Integer[1];
        assertNull(ints[0]);
    }

    /**
     * toArray(null) throws NPE
     */
    public void testToArray_BadArg() {
        SynchronousQueue q = new SynchronousQueue();
        try {
            Object o[] = q.toArray(null);
            shouldThrow();
        } catch (NullPointerException success) {}
    }


    /**
     * iterator does not traverse any elements
     */
    public void testIterator() {
        SynchronousQueue q = new SynchronousQueue();
        Iterator it = q.iterator();
        assertFalse(it.hasNext());
        try {
            Object x = it.next();
            shouldThrow();
        } catch (NoSuchElementException success) {}
    }

    /**
     * iterator remove throws ISE
     */
    public void testIteratorRemove() {
        SynchronousQueue q = new SynchronousQueue();
        Iterator it = q.iterator();
        try {
            it.remove();
            shouldThrow();
        } catch (IllegalStateException success) {}
    }

    /**
     * toString returns a non-null string
     */
    public void testToString() {
        SynchronousQueue q = new SynchronousQueue();
        String s = q.toString();
        assertNotNull(s);
    }


    /**
     * offer transfers elements across Executor tasks
     */
    public void testOfferInExecutor() {
        final SynchronousQueue q = new SynchronousQueue();
        ExecutorService executor = Executors.newFixedThreadPool(2);

        executor.execute(new CheckedRunnable() {
            public void realRun() throws InterruptedException {
                assertFalse(q.offer(one));
                assertTrue(q.offer(one, MEDIUM_DELAY_MS, MILLISECONDS));
                assertEquals(0, q.remainingCapacity());
            }});

        executor.execute(new CheckedRunnable() {
            public void realRun() throws InterruptedException {
                Thread.sleep(SMALL_DELAY_MS);
                assertSame(one, q.take());
            }});

        joinPool(executor);
    }

    /**
     * poll retrieves elements across Executor threads
     */
    public void testPollInExecutor() {
        final SynchronousQueue q = new SynchronousQueue();
        ExecutorService executor = Executors.newFixedThreadPool(2);
        executor.execute(new CheckedRunnable() {
            public void realRun() throws InterruptedException {
                assertNull(q.poll());
                assertSame(one, q.poll(MEDIUM_DELAY_MS, MILLISECONDS));
                assertTrue(q.isEmpty());
            }});

        executor.execute(new CheckedRunnable() {
            public void realRun() throws InterruptedException {
                Thread.sleep(SHORT_DELAY_MS);
                q.put(one);
            }});

        joinPool(executor);
    }

    /**
     * a deserialized serialized queue is usable
     */
    public void testSerialization() throws Exception {
        SynchronousQueue q = new SynchronousQueue();
        ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
        ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
        out.writeObject(q);
        out.close();

        ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
        ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
        SynchronousQueue r = (SynchronousQueue)in.readObject();
        assertEquals(q.size(), r.size());
        while (!q.isEmpty())
            assertEquals(q.remove(), r.remove());
    }

    /**
     * drainTo(null) throws NPE
     */
    public void testDrainToNull() {
        SynchronousQueue q = new SynchronousQueue();
        try {
            q.drainTo(null);
            shouldThrow();
        } catch (NullPointerException success) {}
    }

    /**
     * drainTo(this) throws IAE
     */
    public void testDrainToSelf() {
        SynchronousQueue q = new SynchronousQueue();
        try {
            q.drainTo(q);
            shouldThrow();
        } catch (IllegalArgumentException success) {}
    }

    /**
     * drainTo(c) of empty queue doesn't transfer elements
     */
    public void testDrainTo() {
        SynchronousQueue q = new SynchronousQueue();
        ArrayList l = new ArrayList();
        q.drainTo(l);
        assertEquals(q.size(), 0);
        assertEquals(l.size(), 0);
    }

    /**
     * drainTo empties queue, unblocking a waiting put.
     */
    public void testDrainToWithActivePut() throws InterruptedException {
        final SynchronousQueue q = new SynchronousQueue();
        Thread t = new Thread(new CheckedRunnable() {
            public void realRun() throws InterruptedException {
                q.put(new Integer(1));
            }});

        t.start();
        ArrayList l = new ArrayList();
        Thread.sleep(SHORT_DELAY_MS);
        q.drainTo(l);
        assertTrue(l.size() <= 1);
        if (l.size() > 0)
            assertEquals(l.get(0), new Integer(1));
        t.join();
        assertTrue(l.size() <= 1);
    }

    /**
     * drainTo(null, n) throws NPE
     */
    public void testDrainToNullN() {
        SynchronousQueue q = new SynchronousQueue();
        try {
            q.drainTo(null, 0);
            shouldThrow();
        } catch (NullPointerException success) {}
    }

    /**
     * drainTo(this, n) throws IAE
     */
    public void testDrainToSelfN() {
        SynchronousQueue q = new SynchronousQueue();
        try {
            q.drainTo(q, 0);
            shouldThrow();
        } catch (IllegalArgumentException success) {}
    }

    /**
     * drainTo(c, n) empties up to n elements of queue into c
     */
    public void testDrainToN() throws InterruptedException {
        final SynchronousQueue q = new SynchronousQueue();
        Thread t1 = new Thread(new CheckedRunnable() {
            public void realRun() throws InterruptedException {
                q.put(one);
            }});

        Thread t2 = new Thread(new CheckedRunnable() {
            public void realRun() throws InterruptedException {
                q.put(two);
            }});

        t1.start();
        t2.start();
        ArrayList l = new ArrayList();
        Thread.sleep(SHORT_DELAY_MS);
        q.drainTo(l, 1);
        assertEquals(1, l.size());
        q.drainTo(l, 1);
        assertEquals(2, l.size());
        assertTrue(l.contains(one));
        assertTrue(l.contains(two));
        t1.join();
        t2.join();
    }

}
Revision:	1.26
Committed:	Sat Oct 9 19:30:35 2010 UTC (13 years, 7 months ago) by jsr166
Branch:	MAIN
Changes since 1.25:	+2 -2 lines
Log Message:	whitespace
#	User	Rev	Content
1	dl	1.1	/*
2	dl	1.7	* 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	jsr166	1.10	* Other contributors include Andrew Wright, Jeffrey Hayes,
6			* Pat Fisher, Mike Judd.
7	dl	1.1	*/
8
9			import junit.framework.*;
10			import java.util.*;
11			import java.util.concurrent.*;
12	jsr166	1.13	import static java.util.concurrent.TimeUnit.MILLISECONDS;
13	dl	1.2	import java.io.*;
14	dl	1.1
15	dl	1.3	public class SynchronousQueueTest extends JSR166TestCase {
16	dl	1.1
17	jsr166	1.25	public static class Fair extends BlockingQueueTest {
18			protected BlockingQueue emptyCollection() {
19			return new SynchronousQueue(true);
20			}
21			}
22
23			public static class NonFair extends BlockingQueueTest {
24			protected BlockingQueue emptyCollection() {
25			return new SynchronousQueue(false);
26			}
27			}
28
29	dl	1.1	public static void main(String[] args) {
30	jsr166	1.21	junit.textui.TestRunner.run(suite());
31	dl	1.1	}
32
33			public static Test suite() {
34	jsr166	1.25	return newTestSuite(SynchronousQueueTest.class,
35			new Fair().testSuite(),
36			new NonFair().testSuite());
37	dl	1.1	}
38
39	dl	1.4	/**
40	dl	1.5	* A SynchronousQueue is both empty and full
41	dl	1.4	*/
42	dl	1.1	public void testEmptyFull() {
43			SynchronousQueue q = new SynchronousQueue();
44			assertTrue(q.isEmpty());
45	jsr166	1.14	assertEquals(0, q.size());
46	dl	1.1	assertEquals(0, q.remainingCapacity());
47	dl	1.5	assertFalse(q.offer(zero));
48	dl	1.1	}
49
50	dl	1.4	/**
51	dl	1.8	* A fair SynchronousQueue is both empty and full
52			*/
53			public void testFairEmptyFull() {
54			SynchronousQueue q = new SynchronousQueue(true);
55			assertTrue(q.isEmpty());
56	jsr166	1.14	assertEquals(0, q.size());
57	dl	1.8	assertEquals(0, q.remainingCapacity());
58			assertFalse(q.offer(zero));
59			}
60
61			/**
62	dl	1.5	* offer(null) throws NPE
63	dl	1.4	*/
64			public void testOfferNull() {
65	jsr166	1.14	try {
66	dl	1.1	SynchronousQueue q = new SynchronousQueue();
67			q.offer(null);
68	dl	1.4	shouldThrow();
69	jsr166	1.13	} catch (NullPointerException success) {}
70	dl	1.1	}
71
72	dl	1.4	/**
73	dl	1.6	* add(null) throws NPE
74			*/
75			public void testAddNull() {
76	jsr166	1.14	try {
77	dl	1.6	SynchronousQueue q = new SynchronousQueue();
78			q.add(null);
79			shouldThrow();
80	jsr166	1.13	} catch (NullPointerException success) {}
81	dl	1.6	}
82
83			/**
84	dl	1.5	* offer fails if no active taker
85	dl	1.4	*/
86			public void testOffer() {
87	dl	1.1	SynchronousQueue q = new SynchronousQueue();
88	dl	1.5	assertFalse(q.offer(one));
89	dl	1.1	}
90
91	dl	1.4	/**
92	dl	1.5	* add throws ISE if no active taker
93	dl	1.4	*/
94			public void testAdd() {
95	jsr166	1.14	try {
96	dl	1.1	SynchronousQueue q = new SynchronousQueue();
97			assertEquals(0, q.remainingCapacity());
98	dl	1.5	q.add(one);
99			shouldThrow();
100	jsr166	1.13	} catch (IllegalStateException success) {}
101	dl	1.1	}
102
103	dl	1.4	/**
104	dl	1.5	* addAll(null) throws NPE
105	dl	1.4	*/
106			public void testAddAll1() {
107	dl	1.1	try {
108			SynchronousQueue q = new SynchronousQueue();
109			q.addAll(null);
110	dl	1.4	shouldThrow();
111	jsr166	1.13	} catch (NullPointerException success) {}
112	dl	1.1	}
113	dl	1.6
114			/**
115			* addAll(this) throws IAE
116			*/
117			public void testAddAllSelf() {
118			try {
119			SynchronousQueue q = new SynchronousQueue();
120			q.addAll(q);
121			shouldThrow();
122	jsr166	1.13	} catch (IllegalArgumentException success) {}
123	dl	1.6	}
124
125	dl	1.4	/**
126	dl	1.5	* addAll of a collection with null elements throws NPE
127	dl	1.4	*/
128			public void testAddAll2() {
129	dl	1.1	try {
130			SynchronousQueue q = new SynchronousQueue();
131	dl	1.3	Integer[] ints = new Integer[1];
132	dl	1.1	q.addAll(Arrays.asList(ints));
133	dl	1.4	shouldThrow();
134	jsr166	1.13	} catch (NullPointerException success) {}
135	dl	1.1	}
136	jsr166	1.22
137	dl	1.4	/**
138	dl	1.5	* addAll throws ISE if no active taker
139	dl	1.4	*/
140			public void testAddAll4() {
141	dl	1.1	try {
142			SynchronousQueue q = new SynchronousQueue();
143	dl	1.3	Integer[] ints = new Integer[1];
144			for (int i = 0; i < 1; ++i)
145	dl	1.1	ints[i] = new Integer(i);
146			q.addAll(Arrays.asList(ints));
147	dl	1.4	shouldThrow();
148	jsr166	1.13	} catch (IllegalStateException success) {}
149	dl	1.1	}
150
151	dl	1.4	/**
152	dl	1.5	* put(null) throws NPE
153	dl	1.4	*/
154	jsr166	1.13	public void testPutNull() throws InterruptedException {
155	jsr166	1.14	try {
156	dl	1.1	SynchronousQueue q = new SynchronousQueue();
157			q.put(null);
158	dl	1.4	shouldThrow();
159	jsr166	1.13	} catch (NullPointerException success) {}
160	dl	1.1	}
161
162	dl	1.4	/**
163	dl	1.5	* put blocks interruptibly if no active taker
164	dl	1.4	*/
165	jsr166	1.13	public void testBlockingPut() throws InterruptedException {
166	jsr166	1.14	Thread t = new Thread(new CheckedInterruptedRunnable() {
167			public void realRun() throws InterruptedException {
168	jsr166	1.13	SynchronousQueue q = new SynchronousQueue();
169			q.put(zero);
170			}});
171
172	dl	1.1	t.start();
173	jsr166	1.13	Thread.sleep(SHORT_DELAY_MS);
174			t.interrupt();
175			t.join();
176	dl	1.1	}
177
178	dl	1.4	/**
179	jsr166	1.10	* put blocks waiting for take
180	dl	1.4	*/
181	jsr166	1.13	public void testPutWithTake() throws InterruptedException {
182	dl	1.1	final SynchronousQueue q = new SynchronousQueue();
183	jsr166	1.14	Thread t = new Thread(new CheckedRunnable() {
184			public void realRun() throws InterruptedException {
185	jsr166	1.13	int added = 0;
186			try {
187	jsr166	1.19	while (true) {
188			q.put(added);
189			++added;
190			}
191	jsr166	1.13	} catch (InterruptedException success) {
192	jsr166	1.23	assertEquals(1, added);
193	dl	1.1	}
194	jsr166	1.13	}});
195
196			t.start();
197			Thread.sleep(SHORT_DELAY_MS);
198	jsr166	1.19	assertEquals(0, q.take());
199	jsr166	1.13	Thread.sleep(SHORT_DELAY_MS);
200			t.interrupt();
201			t.join();
202	dl	1.1	}
203
204	dl	1.4	/**
205	dl	1.5	* timed offer times out if elements not taken
206	dl	1.4	*/
207	jsr166	1.13	public void testTimedOffer() throws InterruptedException {
208	dl	1.1	final SynchronousQueue q = new SynchronousQueue();
209	jsr166	1.14	Thread t = new Thread(new CheckedInterruptedRunnable() {
210			public void realRun() throws InterruptedException {
211	jsr166	1.17	assertFalse(q.offer(new Object(), SHORT_DELAY_MS, MILLISECONDS));
212	jsr166	1.13	q.offer(new Object(), LONG_DELAY_MS, MILLISECONDS);
213			}});
214	jsr166	1.10
215	jsr166	1.13	t.start();
216			Thread.sleep(SMALL_DELAY_MS);
217			t.interrupt();
218			t.join();
219	dl	1.1	}
220
221
222	dl	1.4	/**
223	dl	1.5	* take blocks interruptibly when empty
224	dl	1.4	*/
225	jsr166	1.13	public void testTakeFromEmpty() throws InterruptedException {
226	dl	1.1	final SynchronousQueue q = new SynchronousQueue();
227	jsr166	1.14	Thread t = new Thread(new CheckedInterruptedRunnable() {
228			public void realRun() throws InterruptedException {
229	jsr166	1.13	q.take();
230			}});
231
232			t.start();
233			Thread.sleep(SHORT_DELAY_MS);
234			t.interrupt();
235			t.join();
236	dl	1.1	}
237
238	dl	1.8
239			/**
240			* put blocks interruptibly if no active taker
241			*/
242	jsr166	1.13	public void testFairBlockingPut() throws InterruptedException {
243	jsr166	1.14	Thread t = new Thread(new CheckedInterruptedRunnable() {
244			public void realRun() throws InterruptedException {
245	jsr166	1.13	SynchronousQueue q = new SynchronousQueue(true);
246			q.put(zero);
247			}});
248
249	dl	1.8	t.start();
250	jsr166	1.13	Thread.sleep(SHORT_DELAY_MS);
251			t.interrupt();
252			t.join();
253	dl	1.8	}
254
255			/**
256	jsr166	1.10	* put blocks waiting for take
257	dl	1.8	*/
258	jsr166	1.13	public void testFairPutWithTake() throws InterruptedException {
259	dl	1.8	final SynchronousQueue q = new SynchronousQueue(true);
260	jsr166	1.14	Thread t = new Thread(new CheckedRunnable() {
261			public void realRun() throws InterruptedException {
262	jsr166	1.13	int added = 0;
263			try {
264	jsr166	1.19	while (true) {
265			q.put(added);
266			++added;
267			}
268	jsr166	1.13	} catch (InterruptedException success) {
269	jsr166	1.23	assertEquals(1, added);
270	dl	1.8	}
271	jsr166	1.13	}});
272
273			t.start();
274			Thread.sleep(SHORT_DELAY_MS);
275	jsr166	1.19	assertEquals(0, q.take());
276	jsr166	1.13	Thread.sleep(SHORT_DELAY_MS);
277			t.interrupt();
278			t.join();
279	dl	1.8	}
280
281			/**
282			* timed offer times out if elements not taken
283			*/
284	jsr166	1.13	public void testFairTimedOffer() throws InterruptedException {
285	dl	1.8	final SynchronousQueue q = new SynchronousQueue(true);
286	jsr166	1.14	Thread t = new Thread(new CheckedInterruptedRunnable() {
287			public void realRun() throws InterruptedException {
288	jsr166	1.19	assertFalse(q.offer(new Object(), SHORT_DELAY_MS, MILLISECONDS));
289	jsr166	1.13	q.offer(new Object(), LONG_DELAY_MS, MILLISECONDS);
290			}});
291	jsr166	1.10
292	jsr166	1.13	t.start();
293			Thread.sleep(SMALL_DELAY_MS);
294			t.interrupt();
295			t.join();
296	dl	1.8	}
297
298
299			/**
300			* take blocks interruptibly when empty
301			*/
302	jsr166	1.13	public void testFairTakeFromEmpty() throws InterruptedException {
303	dl	1.8	final SynchronousQueue q = new SynchronousQueue(true);
304	jsr166	1.14	Thread t = new Thread(new CheckedInterruptedRunnable() {
305			public void realRun() throws InterruptedException {
306	jsr166	1.13	q.take();
307			}});
308
309			t.start();
310			Thread.sleep(SHORT_DELAY_MS);
311			t.interrupt();
312			t.join();
313	dl	1.8	}
314
315	dl	1.4	/**
316	dl	1.5	* poll fails unless active taker
317	dl	1.4	*/
318			public void testPoll() {
319	dl	1.1	SynchronousQueue q = new SynchronousQueue();
320	jsr166	1.14	assertNull(q.poll());
321	dl	1.1	}
322
323	dl	1.4	/**
324	dl	1.5	* timed pool with zero timeout times out if no active taker
325	dl	1.4	*/
326	jsr166	1.13	public void testTimedPoll0() throws InterruptedException {
327			SynchronousQueue q = new SynchronousQueue();
328			assertNull(q.poll(0, MILLISECONDS));
329	dl	1.1	}
330
331	dl	1.4	/**
332	dl	1.5	* timed pool with nonzero timeout times out if no active taker
333	dl	1.4	*/
334	jsr166	1.13	public void testTimedPoll() throws InterruptedException {
335			SynchronousQueue q = new SynchronousQueue();
336			assertNull(q.poll(SHORT_DELAY_MS, MILLISECONDS));
337	dl	1.1	}
338
339	dl	1.4	/**
340	dl	1.5	* Interrupted timed poll throws InterruptedException instead of
341			* returning timeout status
342	dl	1.4	*/
343	jsr166	1.13	public void testInterruptedTimedPoll() throws InterruptedException {
344	jsr166	1.15	final SynchronousQueue q = new SynchronousQueue();
345	jsr166	1.14	Thread t = new Thread(new CheckedInterruptedRunnable() {
346			public void realRun() throws InterruptedException {
347	jsr166	1.13	q.poll(SMALL_DELAY_MS, MILLISECONDS);
348			}});
349
350	dl	1.1	t.start();
351	jsr166	1.13	Thread.sleep(SHORT_DELAY_MS);
352			t.interrupt();
353			t.join();
354	dl	1.1	}
355
356	dl	1.4	/**
357	dl	1.8	* Interrupted timed poll throws InterruptedException instead of
358			* returning timeout status
359			*/
360	jsr166	1.13	public void testFairInterruptedTimedPoll() throws InterruptedException {
361	jsr166	1.14	Thread t = new Thread(new CheckedInterruptedRunnable() {
362			public void realRun() throws InterruptedException {
363	jsr166	1.13	SynchronousQueue q = new SynchronousQueue(true);
364			q.poll(SMALL_DELAY_MS, MILLISECONDS);
365			}});
366
367	dl	1.8	t.start();
368	jsr166	1.13	Thread.sleep(SHORT_DELAY_MS);
369			t.interrupt();
370			t.join();
371	dl	1.8	}
372
373			/**
374	jsr166	1.26	* timed poll before a delayed offer fails; after offer succeeds;
375			* on interruption throws
376	dl	1.8	*/
377	jsr166	1.13	public void testFairTimedPollWithOffer() throws InterruptedException {
378	dl	1.8	final SynchronousQueue q = new SynchronousQueue(true);
379	jsr166	1.14	Thread t = new Thread(new CheckedRunnable() {
380			public void realRun() throws InterruptedException {
381	jsr166	1.13	try {
382	dl	1.24	assertNull(q.poll(SHORT_DELAY_MS, MILLISECONDS));
383			assertSame(zero, q.poll(LONG_DELAY_MS, MILLISECONDS));
384	jsr166	1.13	q.poll(LONG_DELAY_MS, MILLISECONDS);
385			threadShouldThrow();
386			} catch (InterruptedException success) {}
387			}});
388
389			t.start();
390			Thread.sleep(SMALL_DELAY_MS);
391			assertTrue(q.offer(zero, SHORT_DELAY_MS, MILLISECONDS));
392			t.interrupt();
393			t.join();
394	jsr166	1.10	}
395	dl	1.1
396
397	dl	1.4	/**
398	dl	1.5	* peek returns null
399	dl	1.4	*/
400			public void testPeek() {
401	dl	1.1	SynchronousQueue q = new SynchronousQueue();
402	jsr166	1.14	assertNull(q.peek());
403	dl	1.1	}
404
405	dl	1.4	/**
406	dl	1.5	* element throws NSEE
407	dl	1.4	*/
408			public void testElement() {
409	dl	1.1	SynchronousQueue q = new SynchronousQueue();
410			try {
411			q.element();
412	dl	1.4	shouldThrow();
413	jsr166	1.13	} catch (NoSuchElementException success) {}
414	dl	1.1	}
415
416	dl	1.4	/**
417	dl	1.5	* remove throws NSEE if no active taker
418	dl	1.4	*/
419			public void testRemove() {
420	dl	1.1	SynchronousQueue q = new SynchronousQueue();
421			try {
422			q.remove();
423	dl	1.4	shouldThrow();
424	jsr166	1.16	} catch (NoSuchElementException success) {}
425	dl	1.1	}
426
427	dl	1.4	/**
428	dl	1.5	* remove(x) returns false
429	dl	1.4	*/
430			public void testRemoveElement() {
431	dl	1.1	SynchronousQueue q = new SynchronousQueue();
432	dl	1.5	assertFalse(q.remove(zero));
433	dl	1.2	assertTrue(q.isEmpty());
434	dl	1.1	}
435	jsr166	1.10
436	dl	1.4	/**
437	dl	1.5	* contains returns false
438	dl	1.4	*/
439			public void testContains() {
440	dl	1.1	SynchronousQueue q = new SynchronousQueue();
441	dl	1.5	assertFalse(q.contains(zero));
442	dl	1.1	}
443
444	dl	1.4	/**
445	dl	1.5	* clear ensures isEmpty
446	dl	1.4	*/
447			public void testClear() {
448	dl	1.1	SynchronousQueue q = new SynchronousQueue();
449			q.clear();
450			assertTrue(q.isEmpty());
451			}
452
453	dl	1.4	/**
454	dl	1.5	* containsAll returns false unless empty
455	dl	1.4	*/
456			public void testContainsAll() {
457	dl	1.1	SynchronousQueue q = new SynchronousQueue();
458			Integer[] empty = new Integer[0];
459	dl	1.5	assertTrue(q.containsAll(Arrays.asList(empty)));
460			Integer[] ints = new Integer[1]; ints[0] = zero;
461	dl	1.1	assertFalse(q.containsAll(Arrays.asList(ints)));
462			}
463
464	dl	1.4	/**
465	dl	1.5	* retainAll returns false
466	dl	1.4	*/
467			public void testRetainAll() {
468	dl	1.1	SynchronousQueue q = new SynchronousQueue();
469			Integer[] empty = new Integer[0];
470	dl	1.5	assertFalse(q.retainAll(Arrays.asList(empty)));
471			Integer[] ints = new Integer[1]; ints[0] = zero;
472			assertFalse(q.retainAll(Arrays.asList(ints)));
473	dl	1.1	}
474
475	dl	1.4	/**
476	dl	1.5	* removeAll returns false
477	dl	1.4	*/
478			public void testRemoveAll() {
479	dl	1.1	SynchronousQueue q = new SynchronousQueue();
480			Integer[] empty = new Integer[0];
481	dl	1.5	assertFalse(q.removeAll(Arrays.asList(empty)));
482			Integer[] ints = new Integer[1]; ints[0] = zero;
483	dl	1.1	assertFalse(q.containsAll(Arrays.asList(ints)));
484			}
485
486
487	dl	1.4	/**
488	dl	1.5	* toArray is empty
489	dl	1.4	*/
490			public void testToArray() {
491	dl	1.1	SynchronousQueue q = new SynchronousQueue();
492	jsr166	1.14	Object[] o = q.toArray();
493	dl	1.1	assertEquals(o.length, 0);
494			}
495
496	dl	1.4	/**
497	dl	1.5	* toArray(a) is nulled at position 0
498	dl	1.4	*/
499			public void testToArray2() {
500	dl	1.1	SynchronousQueue q = new SynchronousQueue();
501	jsr166	1.14	Integer[] ints = new Integer[1];
502	dl	1.1	assertNull(ints[0]);
503			}
504	jsr166	1.10
505	dl	1.4	/**
506	dl	1.6	* toArray(null) throws NPE
507			*/
508			public void testToArray_BadArg() {
509	jsr166	1.18	SynchronousQueue q = new SynchronousQueue();
510	jsr166	1.14	try {
511			Object o[] = q.toArray(null);
512			shouldThrow();
513			} catch (NullPointerException success) {}
514	dl	1.6	}
515
516
517			/**
518	dl	1.5	* iterator does not traverse any elements
519	dl	1.4	*/
520			public void testIterator() {
521	dl	1.1	SynchronousQueue q = new SynchronousQueue();
522	jsr166	1.14	Iterator it = q.iterator();
523	dl	1.1	assertFalse(it.hasNext());
524			try {
525			Object x = it.next();
526	dl	1.4	shouldThrow();
527	jsr166	1.13	} catch (NoSuchElementException success) {}
528	dl	1.1	}
529
530	dl	1.4	/**
531	dl	1.5	* iterator remove throws ISE
532	dl	1.4	*/
533			public void testIteratorRemove() {
534	dl	1.1	SynchronousQueue q = new SynchronousQueue();
535	jsr166	1.14	Iterator it = q.iterator();
536	dl	1.1	try {
537			it.remove();
538	dl	1.4	shouldThrow();
539	jsr166	1.13	} catch (IllegalStateException success) {}
540	dl	1.1	}
541
542	dl	1.4	/**
543	dl	1.5	* toString returns a non-null string
544	dl	1.4	*/
545			public void testToString() {
546	dl	1.1	SynchronousQueue q = new SynchronousQueue();
547			String s = q.toString();
548	dl	1.5	assertNotNull(s);
549	jsr166	1.10	}
550	dl	1.1
551
552	dl	1.4	/**
553	dl	1.5	* offer transfers elements across Executor tasks
554	dl	1.4	*/
555	dl	1.1	public void testOfferInExecutor() {
556			final SynchronousQueue q = new SynchronousQueue();
557			ExecutorService executor = Executors.newFixedThreadPool(2);
558
559	jsr166	1.13	executor.execute(new CheckedRunnable() {
560	jsr166	1.14	public void realRun() throws InterruptedException {
561	jsr166	1.19	assertFalse(q.offer(one));
562			assertTrue(q.offer(one, MEDIUM_DELAY_MS, MILLISECONDS));
563			assertEquals(0, q.remainingCapacity());
564	jsr166	1.13	}});
565
566			executor.execute(new CheckedRunnable() {
567	jsr166	1.14	public void realRun() throws InterruptedException {
568	jsr166	1.13	Thread.sleep(SMALL_DELAY_MS);
569	jsr166	1.19	assertSame(one, q.take());
570	jsr166	1.13	}});
571	jsr166	1.10
572	dl	1.3	joinPool(executor);
573	dl	1.1	}
574
575	dl	1.4	/**
576	dl	1.5	* poll retrieves elements across Executor threads
577	dl	1.4	*/
578	dl	1.1	public void testPollInExecutor() {
579			final SynchronousQueue q = new SynchronousQueue();
580			ExecutorService executor = Executors.newFixedThreadPool(2);
581	jsr166	1.13	executor.execute(new CheckedRunnable() {
582	jsr166	1.14	public void realRun() throws InterruptedException {
583	jsr166	1.19	assertNull(q.poll());
584			assertSame(one, q.poll(MEDIUM_DELAY_MS, MILLISECONDS));
585			assertTrue(q.isEmpty());
586	jsr166	1.13	}});
587
588			executor.execute(new CheckedRunnable() {
589	jsr166	1.14	public void realRun() throws InterruptedException {
590	jsr166	1.19	Thread.sleep(SHORT_DELAY_MS);
591			q.put(one);
592	jsr166	1.13	}});
593	jsr166	1.10
594	dl	1.3	joinPool(executor);
595	dl	1.2	}
596
597	dl	1.4	/**
598	dl	1.5	* a deserialized serialized queue is usable
599	dl	1.4	*/
600	jsr166	1.13	public void testSerialization() throws Exception {
601	dl	1.2	SynchronousQueue q = new SynchronousQueue();
602	jsr166	1.13	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
603			ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
604			out.writeObject(q);
605			out.close();
606
607			ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
608			ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
609			SynchronousQueue r = (SynchronousQueue)in.readObject();
610			assertEquals(q.size(), r.size());
611			while (!q.isEmpty())
612			assertEquals(q.remove(), r.remove());
613	dl	1.1	}
614	dl	1.6
615			/**
616			* drainTo(null) throws NPE
617	jsr166	1.10	*/
618	dl	1.6	public void testDrainToNull() {
619			SynchronousQueue q = new SynchronousQueue();
620			try {
621			q.drainTo(null);
622			shouldThrow();
623	jsr166	1.13	} catch (NullPointerException success) {}
624	dl	1.6	}
625
626			/**
627			* drainTo(this) throws IAE
628	jsr166	1.10	*/
629	dl	1.6	public void testDrainToSelf() {
630			SynchronousQueue q = new SynchronousQueue();
631			try {
632			q.drainTo(q);
633			shouldThrow();
634	jsr166	1.13	} catch (IllegalArgumentException success) {}
635	dl	1.6	}
636
637			/**
638			* drainTo(c) of empty queue doesn't transfer elements
639	jsr166	1.10	*/
640	dl	1.6	public void testDrainTo() {
641			SynchronousQueue q = new SynchronousQueue();
642			ArrayList l = new ArrayList();
643			q.drainTo(l);
644			assertEquals(q.size(), 0);
645			assertEquals(l.size(), 0);
646			}
647
648			/**
649			* drainTo empties queue, unblocking a waiting put.
650	jsr166	1.10	*/
651	jsr166	1.13	public void testDrainToWithActivePut() throws InterruptedException {
652	dl	1.6	final SynchronousQueue q = new SynchronousQueue();
653	jsr166	1.14	Thread t = new Thread(new CheckedRunnable() {
654			public void realRun() throws InterruptedException {
655	jsr166	1.13	q.put(new Integer(1));
656			}});
657
658			t.start();
659			ArrayList l = new ArrayList();
660			Thread.sleep(SHORT_DELAY_MS);
661			q.drainTo(l);
662			assertTrue(l.size() <= 1);
663			if (l.size() > 0)
664			assertEquals(l.get(0), new Integer(1));
665			t.join();
666			assertTrue(l.size() <= 1);
667	dl	1.6	}
668
669			/**
670			* drainTo(null, n) throws NPE
671	jsr166	1.10	*/
672	dl	1.6	public void testDrainToNullN() {
673			SynchronousQueue q = new SynchronousQueue();
674			try {
675			q.drainTo(null, 0);
676			shouldThrow();
677	jsr166	1.13	} catch (NullPointerException success) {}
678	dl	1.6	}
679
680			/**
681			* drainTo(this, n) throws IAE
682	jsr166	1.10	*/
683	dl	1.6	public void testDrainToSelfN() {
684			SynchronousQueue q = new SynchronousQueue();
685			try {
686			q.drainTo(q, 0);
687			shouldThrow();
688	jsr166	1.16	} catch (IllegalArgumentException success) {}
689	dl	1.6	}
690
691			/**
692			* drainTo(c, n) empties up to n elements of queue into c
693	jsr166	1.10	*/
694	jsr166	1.13	public void testDrainToN() throws InterruptedException {
695	dl	1.6	final SynchronousQueue q = new SynchronousQueue();
696	jsr166	1.14	Thread t1 = new Thread(new CheckedRunnable() {
697			public void realRun() throws InterruptedException {
698	jsr166	1.13	q.put(one);
699			}});
700
701	jsr166	1.14	Thread t2 = new Thread(new CheckedRunnable() {
702			public void realRun() throws InterruptedException {
703	jsr166	1.13	q.put(two);
704			}});
705	dl	1.6
706	jsr166	1.13	t1.start();
707			t2.start();
708			ArrayList l = new ArrayList();
709			Thread.sleep(SHORT_DELAY_MS);
710			q.drainTo(l, 1);
711	jsr166	1.23	assertEquals(1, l.size());
712	jsr166	1.13	q.drainTo(l, 1);
713	jsr166	1.23	assertEquals(2, l.size());
714	jsr166	1.13	assertTrue(l.contains(one));
715			assertTrue(l.contains(two));
716			t1.join();
717			t2.join();
718	dl	1.6	}
719
720	dl	1.1	}