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();
    }

    /**
     * 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:	1.27
Committed:	Thu Oct 28 17:57:26 2010 UTC (13 years, 6 months ago) by jsr166
Branch:	MAIN
Changes since 1.26:	+0 -18 lines
Log Message:	refactor testTakeFromEmpty into BlockingQueueTest
#	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	dl	1.8	/**
222			* put blocks interruptibly if no active taker
223			*/
224	jsr166	1.13	public void testFairBlockingPut() throws InterruptedException {
225	jsr166	1.14	Thread t = new Thread(new CheckedInterruptedRunnable() {
226			public void realRun() throws InterruptedException {
227	jsr166	1.13	SynchronousQueue q = new SynchronousQueue(true);
228			q.put(zero);
229			}});
230
231	dl	1.8	t.start();
232	jsr166	1.13	Thread.sleep(SHORT_DELAY_MS);
233			t.interrupt();
234			t.join();
235	dl	1.8	}
236
237			/**
238	jsr166	1.10	* put blocks waiting for take
239	dl	1.8	*/
240	jsr166	1.13	public void testFairPutWithTake() throws InterruptedException {
241	dl	1.8	final SynchronousQueue q = new SynchronousQueue(true);
242	jsr166	1.14	Thread t = new Thread(new CheckedRunnable() {
243			public void realRun() throws InterruptedException {
244	jsr166	1.13	int added = 0;
245			try {
246	jsr166	1.19	while (true) {
247			q.put(added);
248			++added;
249			}
250	jsr166	1.13	} catch (InterruptedException success) {
251	jsr166	1.23	assertEquals(1, added);
252	dl	1.8	}
253	jsr166	1.13	}});
254
255			t.start();
256			Thread.sleep(SHORT_DELAY_MS);
257	jsr166	1.19	assertEquals(0, q.take());
258	jsr166	1.13	Thread.sleep(SHORT_DELAY_MS);
259			t.interrupt();
260			t.join();
261	dl	1.8	}
262
263			/**
264			* timed offer times out if elements not taken
265			*/
266	jsr166	1.13	public void testFairTimedOffer() throws InterruptedException {
267	dl	1.8	final SynchronousQueue q = new SynchronousQueue(true);
268	jsr166	1.14	Thread t = new Thread(new CheckedInterruptedRunnable() {
269			public void realRun() throws InterruptedException {
270	jsr166	1.19	assertFalse(q.offer(new Object(), SHORT_DELAY_MS, MILLISECONDS));
271	jsr166	1.13	q.offer(new Object(), LONG_DELAY_MS, MILLISECONDS);
272			}});
273	jsr166	1.10
274	jsr166	1.13	t.start();
275			Thread.sleep(SMALL_DELAY_MS);
276			t.interrupt();
277			t.join();
278	dl	1.8	}
279
280
281			/**
282			* take blocks interruptibly when empty
283			*/
284	jsr166	1.13	public void testFairTakeFromEmpty() 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	1.13	q.take();
289			}});
290
291			t.start();
292			Thread.sleep(SHORT_DELAY_MS);
293			t.interrupt();
294			t.join();
295	dl	1.8	}
296
297	dl	1.4	/**
298	dl	1.5	* poll fails unless active taker
299	dl	1.4	*/
300			public void testPoll() {
301	dl	1.1	SynchronousQueue q = new SynchronousQueue();
302	jsr166	1.14	assertNull(q.poll());
303	dl	1.1	}
304
305	dl	1.4	/**
306	dl	1.5	* timed pool with zero timeout times out if no active taker
307	dl	1.4	*/
308	jsr166	1.13	public void testTimedPoll0() throws InterruptedException {
309			SynchronousQueue q = new SynchronousQueue();
310			assertNull(q.poll(0, MILLISECONDS));
311	dl	1.1	}
312
313	dl	1.4	/**
314	dl	1.5	* timed pool with nonzero timeout times out if no active taker
315	dl	1.4	*/
316	jsr166	1.13	public void testTimedPoll() throws InterruptedException {
317			SynchronousQueue q = new SynchronousQueue();
318			assertNull(q.poll(SHORT_DELAY_MS, MILLISECONDS));
319	dl	1.1	}
320
321	dl	1.4	/**
322	dl	1.5	* Interrupted timed poll throws InterruptedException instead of
323			* returning timeout status
324	dl	1.4	*/
325	jsr166	1.13	public void testInterruptedTimedPoll() throws InterruptedException {
326	jsr166	1.15	final SynchronousQueue q = new SynchronousQueue();
327	jsr166	1.14	Thread t = new Thread(new CheckedInterruptedRunnable() {
328			public void realRun() throws InterruptedException {
329	jsr166	1.13	q.poll(SMALL_DELAY_MS, MILLISECONDS);
330			}});
331
332	dl	1.1	t.start();
333	jsr166	1.13	Thread.sleep(SHORT_DELAY_MS);
334			t.interrupt();
335			t.join();
336	dl	1.1	}
337
338	dl	1.4	/**
339	dl	1.8	* Interrupted timed poll throws InterruptedException instead of
340			* returning timeout status
341			*/
342	jsr166	1.13	public void testFairInterruptedTimedPoll() throws InterruptedException {
343	jsr166	1.14	Thread t = new Thread(new CheckedInterruptedRunnable() {
344			public void realRun() throws InterruptedException {
345	jsr166	1.13	SynchronousQueue q = new SynchronousQueue(true);
346			q.poll(SMALL_DELAY_MS, MILLISECONDS);
347			}});
348
349	dl	1.8	t.start();
350	jsr166	1.13	Thread.sleep(SHORT_DELAY_MS);
351			t.interrupt();
352			t.join();
353	dl	1.8	}
354
355			/**
356	jsr166	1.26	* timed poll before a delayed offer fails; after offer succeeds;
357			* on interruption throws
358	dl	1.8	*/
359	jsr166	1.13	public void testFairTimedPollWithOffer() throws InterruptedException {
360	dl	1.8	final SynchronousQueue q = new SynchronousQueue(true);
361	jsr166	1.14	Thread t = new Thread(new CheckedRunnable() {
362			public void realRun() throws InterruptedException {
363	jsr166	1.13	try {
364	dl	1.24	assertNull(q.poll(SHORT_DELAY_MS, MILLISECONDS));
365			assertSame(zero, q.poll(LONG_DELAY_MS, MILLISECONDS));
366	jsr166	1.13	q.poll(LONG_DELAY_MS, MILLISECONDS);
367			threadShouldThrow();
368			} catch (InterruptedException success) {}
369			}});
370
371			t.start();
372			Thread.sleep(SMALL_DELAY_MS);
373			assertTrue(q.offer(zero, SHORT_DELAY_MS, MILLISECONDS));
374			t.interrupt();
375			t.join();
376	jsr166	1.10	}
377	dl	1.1
378
379	dl	1.4	/**
380	dl	1.5	* peek returns null
381	dl	1.4	*/
382			public void testPeek() {
383	dl	1.1	SynchronousQueue q = new SynchronousQueue();
384	jsr166	1.14	assertNull(q.peek());
385	dl	1.1	}
386
387	dl	1.4	/**
388	dl	1.5	* element throws NSEE
389	dl	1.4	*/
390			public void testElement() {
391	dl	1.1	SynchronousQueue q = new SynchronousQueue();
392			try {
393			q.element();
394	dl	1.4	shouldThrow();
395	jsr166	1.13	} catch (NoSuchElementException success) {}
396	dl	1.1	}
397
398	dl	1.4	/**
399	dl	1.5	* remove throws NSEE if no active taker
400	dl	1.4	*/
401			public void testRemove() {
402	dl	1.1	SynchronousQueue q = new SynchronousQueue();
403			try {
404			q.remove();
405	dl	1.4	shouldThrow();
406	jsr166	1.16	} catch (NoSuchElementException success) {}
407	dl	1.1	}
408
409	dl	1.4	/**
410	dl	1.5	* remove(x) returns false
411	dl	1.4	*/
412			public void testRemoveElement() {
413	dl	1.1	SynchronousQueue q = new SynchronousQueue();
414	dl	1.5	assertFalse(q.remove(zero));
415	dl	1.2	assertTrue(q.isEmpty());
416	dl	1.1	}
417	jsr166	1.10
418	dl	1.4	/**
419	dl	1.5	* contains returns false
420	dl	1.4	*/
421			public void testContains() {
422	dl	1.1	SynchronousQueue q = new SynchronousQueue();
423	dl	1.5	assertFalse(q.contains(zero));
424	dl	1.1	}
425
426	dl	1.4	/**
427	dl	1.5	* clear ensures isEmpty
428	dl	1.4	*/
429			public void testClear() {
430	dl	1.1	SynchronousQueue q = new SynchronousQueue();
431			q.clear();
432			assertTrue(q.isEmpty());
433			}
434
435	dl	1.4	/**
436	dl	1.5	* containsAll returns false unless empty
437	dl	1.4	*/
438			public void testContainsAll() {
439	dl	1.1	SynchronousQueue q = new SynchronousQueue();
440			Integer[] empty = new Integer[0];
441	dl	1.5	assertTrue(q.containsAll(Arrays.asList(empty)));
442			Integer[] ints = new Integer[1]; ints[0] = zero;
443	dl	1.1	assertFalse(q.containsAll(Arrays.asList(ints)));
444			}
445
446	dl	1.4	/**
447	dl	1.5	* retainAll returns false
448	dl	1.4	*/
449			public void testRetainAll() {
450	dl	1.1	SynchronousQueue q = new SynchronousQueue();
451			Integer[] empty = new Integer[0];
452	dl	1.5	assertFalse(q.retainAll(Arrays.asList(empty)));
453			Integer[] ints = new Integer[1]; ints[0] = zero;
454			assertFalse(q.retainAll(Arrays.asList(ints)));
455	dl	1.1	}
456
457	dl	1.4	/**
458	dl	1.5	* removeAll returns false
459	dl	1.4	*/
460			public void testRemoveAll() {
461	dl	1.1	SynchronousQueue q = new SynchronousQueue();
462			Integer[] empty = new Integer[0];
463	dl	1.5	assertFalse(q.removeAll(Arrays.asList(empty)));
464			Integer[] ints = new Integer[1]; ints[0] = zero;
465	dl	1.1	assertFalse(q.containsAll(Arrays.asList(ints)));
466			}
467
468
469	dl	1.4	/**
470	dl	1.5	* toArray is empty
471	dl	1.4	*/
472			public void testToArray() {
473	dl	1.1	SynchronousQueue q = new SynchronousQueue();
474	jsr166	1.14	Object[] o = q.toArray();
475	dl	1.1	assertEquals(o.length, 0);
476			}
477
478	dl	1.4	/**
479	dl	1.5	* toArray(a) is nulled at position 0
480	dl	1.4	*/
481			public void testToArray2() {
482	dl	1.1	SynchronousQueue q = new SynchronousQueue();
483	jsr166	1.14	Integer[] ints = new Integer[1];
484	dl	1.1	assertNull(ints[0]);
485			}
486	jsr166	1.10
487	dl	1.4	/**
488	dl	1.6	* toArray(null) throws NPE
489			*/
490			public void testToArray_BadArg() {
491	jsr166	1.18	SynchronousQueue q = new SynchronousQueue();
492	jsr166	1.14	try {
493			Object o[] = q.toArray(null);
494			shouldThrow();
495			} catch (NullPointerException success) {}
496	dl	1.6	}
497
498
499			/**
500	dl	1.5	* iterator does not traverse any elements
501	dl	1.4	*/
502			public void testIterator() {
503	dl	1.1	SynchronousQueue q = new SynchronousQueue();
504	jsr166	1.14	Iterator it = q.iterator();
505	dl	1.1	assertFalse(it.hasNext());
506			try {
507			Object x = it.next();
508	dl	1.4	shouldThrow();
509	jsr166	1.13	} catch (NoSuchElementException success) {}
510	dl	1.1	}
511
512	dl	1.4	/**
513	dl	1.5	* iterator remove throws ISE
514	dl	1.4	*/
515			public void testIteratorRemove() {
516	dl	1.1	SynchronousQueue q = new SynchronousQueue();
517	jsr166	1.14	Iterator it = q.iterator();
518	dl	1.1	try {
519			it.remove();
520	dl	1.4	shouldThrow();
521	jsr166	1.13	} catch (IllegalStateException success) {}
522	dl	1.1	}
523
524	dl	1.4	/**
525	dl	1.5	* toString returns a non-null string
526	dl	1.4	*/
527			public void testToString() {
528	dl	1.1	SynchronousQueue q = new SynchronousQueue();
529			String s = q.toString();
530	dl	1.5	assertNotNull(s);
531	jsr166	1.10	}
532	dl	1.1
533
534	dl	1.4	/**
535	dl	1.5	* offer transfers elements across Executor tasks
536	dl	1.4	*/
537	dl	1.1	public void testOfferInExecutor() {
538			final SynchronousQueue q = new SynchronousQueue();
539			ExecutorService executor = Executors.newFixedThreadPool(2);
540
541	jsr166	1.13	executor.execute(new CheckedRunnable() {
542	jsr166	1.14	public void realRun() throws InterruptedException {
543	jsr166	1.19	assertFalse(q.offer(one));
544			assertTrue(q.offer(one, MEDIUM_DELAY_MS, MILLISECONDS));
545			assertEquals(0, q.remainingCapacity());
546	jsr166	1.13	}});
547
548			executor.execute(new CheckedRunnable() {
549	jsr166	1.14	public void realRun() throws InterruptedException {
550	jsr166	1.13	Thread.sleep(SMALL_DELAY_MS);
551	jsr166	1.19	assertSame(one, q.take());
552	jsr166	1.13	}});
553	jsr166	1.10
554	dl	1.3	joinPool(executor);
555	dl	1.1	}
556
557	dl	1.4	/**
558	dl	1.5	* poll retrieves elements across Executor threads
559	dl	1.4	*/
560	dl	1.1	public void testPollInExecutor() {
561			final SynchronousQueue q = new SynchronousQueue();
562			ExecutorService executor = Executors.newFixedThreadPool(2);
563	jsr166	1.13	executor.execute(new CheckedRunnable() {
564	jsr166	1.14	public void realRun() throws InterruptedException {
565	jsr166	1.19	assertNull(q.poll());
566			assertSame(one, q.poll(MEDIUM_DELAY_MS, MILLISECONDS));
567			assertTrue(q.isEmpty());
568	jsr166	1.13	}});
569
570			executor.execute(new CheckedRunnable() {
571	jsr166	1.14	public void realRun() throws InterruptedException {
572	jsr166	1.19	Thread.sleep(SHORT_DELAY_MS);
573			q.put(one);
574	jsr166	1.13	}});
575	jsr166	1.10
576	dl	1.3	joinPool(executor);
577	dl	1.2	}
578
579	dl	1.4	/**
580	dl	1.5	* a deserialized serialized queue is usable
581	dl	1.4	*/
582	jsr166	1.13	public void testSerialization() throws Exception {
583	dl	1.2	SynchronousQueue q = new SynchronousQueue();
584	jsr166	1.13	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
585			ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
586			out.writeObject(q);
587			out.close();
588
589			ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
590			ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
591			SynchronousQueue r = (SynchronousQueue)in.readObject();
592			assertEquals(q.size(), r.size());
593			while (!q.isEmpty())
594			assertEquals(q.remove(), r.remove());
595	dl	1.1	}
596	dl	1.6
597			/**
598			* drainTo(null) throws NPE
599	jsr166	1.10	*/
600	dl	1.6	public void testDrainToNull() {
601			SynchronousQueue q = new SynchronousQueue();
602			try {
603			q.drainTo(null);
604			shouldThrow();
605	jsr166	1.13	} catch (NullPointerException success) {}
606	dl	1.6	}
607
608			/**
609			* drainTo(this) throws IAE
610	jsr166	1.10	*/
611	dl	1.6	public void testDrainToSelf() {
612			SynchronousQueue q = new SynchronousQueue();
613			try {
614			q.drainTo(q);
615			shouldThrow();
616	jsr166	1.13	} catch (IllegalArgumentException success) {}
617	dl	1.6	}
618
619			/**
620			* drainTo(c) of empty queue doesn't transfer elements
621	jsr166	1.10	*/
622	dl	1.6	public void testDrainTo() {
623			SynchronousQueue q = new SynchronousQueue();
624			ArrayList l = new ArrayList();
625			q.drainTo(l);
626			assertEquals(q.size(), 0);
627			assertEquals(l.size(), 0);
628			}
629
630			/**
631			* drainTo empties queue, unblocking a waiting put.
632	jsr166	1.10	*/
633	jsr166	1.13	public void testDrainToWithActivePut() throws InterruptedException {
634	dl	1.6	final SynchronousQueue q = new SynchronousQueue();
635	jsr166	1.14	Thread t = new Thread(new CheckedRunnable() {
636			public void realRun() throws InterruptedException {
637	jsr166	1.13	q.put(new Integer(1));
638			}});
639
640			t.start();
641			ArrayList l = new ArrayList();
642			Thread.sleep(SHORT_DELAY_MS);
643			q.drainTo(l);
644			assertTrue(l.size() <= 1);
645			if (l.size() > 0)
646			assertEquals(l.get(0), new Integer(1));
647			t.join();
648			assertTrue(l.size() <= 1);
649	dl	1.6	}
650
651			/**
652			* drainTo(null, n) throws NPE
653	jsr166	1.10	*/
654	dl	1.6	public void testDrainToNullN() {
655			SynchronousQueue q = new SynchronousQueue();
656			try {
657			q.drainTo(null, 0);
658			shouldThrow();
659	jsr166	1.13	} catch (NullPointerException success) {}
660	dl	1.6	}
661
662			/**
663			* drainTo(this, n) throws IAE
664	jsr166	1.10	*/
665	dl	1.6	public void testDrainToSelfN() {
666			SynchronousQueue q = new SynchronousQueue();
667			try {
668			q.drainTo(q, 0);
669			shouldThrow();
670	jsr166	1.16	} catch (IllegalArgumentException success) {}
671	dl	1.6	}
672
673			/**
674			* drainTo(c, n) empties up to n elements of queue into c
675	jsr166	1.10	*/
676	jsr166	1.13	public void testDrainToN() throws InterruptedException {
677	dl	1.6	final SynchronousQueue q = new SynchronousQueue();
678	jsr166	1.14	Thread t1 = new Thread(new CheckedRunnable() {
679			public void realRun() throws InterruptedException {
680	jsr166	1.13	q.put(one);
681			}});
682
683	jsr166	1.14	Thread t2 = new Thread(new CheckedRunnable() {
684			public void realRun() throws InterruptedException {
685	jsr166	1.13	q.put(two);
686			}});
687	dl	1.6
688	jsr166	1.13	t1.start();
689			t2.start();
690			ArrayList l = new ArrayList();
691			Thread.sleep(SHORT_DELAY_MS);
692			q.drainTo(l, 1);
693	jsr166	1.23	assertEquals(1, l.size());
694	jsr166	1.13	q.drainTo(l, 1);
695	jsr166	1.23	assertEquals(2, l.size());
696	jsr166	1.13	assertTrue(l.contains(one));
697			assertTrue(l.contains(two));
698			t1.join();
699			t2.join();
700	dl	1.6	}
701
702	dl	1.1	}