test/tck/DelayQueueTest.java

/*
 * Written by members of JCP JSR-166 Expert Group and released to the
 * public domain. Use, modify, and redistribute this code in any way
 * without acknowledgement. Other contributors include Andrew Wright,
 * Jeffrey Hayes, Pat Fischer, Mike Judd.
 */

import junit.framework.*;
import java.util.*;
import java.util.concurrent.*;

public class DelayQueueTest extends JSR166TestCase {
    public static void main(String[] args) {
        junit.textui.TestRunner.run (suite());  
    }

    public static Test suite() {
        return new TestSuite(DelayQueueTest.class);
    }

    private static final int NOCAP = Integer.MAX_VALUE;

    // Most Q/BQ tests use Pseudodelays, where delays are all elapsed
    // (so, no blocking solely for delays) but are still ordered

    static class PDelay implements Delayed { 
        int pseudodelay;
        PDelay(int i) { pseudodelay = Integer.MIN_VALUE + i; }
        public int compareTo(Object y) {
            int i = pseudodelay;
            int j = ((PDelay)y).pseudodelay;
            if (i < j) return -1;
            if (i > j) return 1;
            return 0;
        }

        public int compareTo(PDelay y) {
            int i = pseudodelay;
            int j = ((PDelay)y).pseudodelay;
            if (i < j) return -1;
            if (i > j) return 1;
            return 0;
        }

        public boolean equals(Object other) {
            return ((PDelay)other).pseudodelay == pseudodelay;
        }
        public boolean equals(PDelay other) {
            return ((PDelay)other).pseudodelay == pseudodelay;
        }


        public long getDelay(TimeUnit ignore) {
            return pseudodelay;
        }
        public int intValue() {
            return pseudodelay;
        }

        public String toString() {
            return String.valueOf(pseudodelay);
        }
    }


    /**
     * Create a queue of given size containing consecutive
     * PDelays 0 ... n.
     */
    private DelayQueue populatedQueue(int n) {
        DelayQueue q = new DelayQueue();
        assertTrue(q.isEmpty());
        for(int i = n-1; i >= 0; i-=2)
            assertTrue(q.offer(new PDelay(i)));
        for(int i = (n & 1); i < n; i+=2)
            assertTrue(q.offer(new PDelay(i)));
        assertFalse(q.isEmpty());
        assertEquals(NOCAP, q.remainingCapacity());
        assertEquals(n, q.size());
        return q;
    }
 
    public void testConstructor1(){
        assertEquals(NOCAP, new DelayQueue().remainingCapacity());
    }

    public void testConstructor3(){

        try {
            DelayQueue q = new DelayQueue(null);
            fail("Cannot make from null collection");
        }
        catch (NullPointerException success) {}
    }

    public void testConstructor4(){
        try {
            PDelay[] ints = new PDelay[SIZE];
            DelayQueue q = new DelayQueue(Arrays.asList(ints));
            fail("Cannot make with null elements");
        }
        catch (NullPointerException success) {}
    }

    public void testConstructor5(){
        try {
            PDelay[] ints = new PDelay[SIZE];
            for (int i = 0; i < SIZE-1; ++i)
                ints[i] = new PDelay(i);
            DelayQueue q = new DelayQueue(Arrays.asList(ints));
            fail("Cannot make with null elements");
        }
        catch (NullPointerException success) {}
    }

    public void testConstructor6(){
        try {
            PDelay[] ints = new PDelay[SIZE];
            for (int i = 0; i < SIZE; ++i)
                ints[i] = new PDelay(i);
            DelayQueue q = new DelayQueue(Arrays.asList(ints));
            for (int i = 0; i < SIZE; ++i)
                assertEquals(ints[i], q.poll());
        }
        finally {}
    }

    public void testEmpty() {
        DelayQueue q = new DelayQueue();
        assertTrue(q.isEmpty());
        assertEquals(NOCAP, q.remainingCapacity());
        q.add(new PDelay(1));
        assertFalse(q.isEmpty());
        q.add(new PDelay(2));
        q.remove();
        q.remove();
        assertTrue(q.isEmpty());
    }

    public void testRemainingCapacity(){
        DelayQueue q = populatedQueue(SIZE);
        for (int i = 0; i < SIZE; ++i) {
            assertEquals(NOCAP, q.remainingCapacity());
            assertEquals(SIZE-i, q.size());
            q.remove();
        }
        for (int i = 0; i < SIZE; ++i) {
            assertEquals(NOCAP, q.remainingCapacity());
            assertEquals(i, q.size());
            q.add(new PDelay(i));
        }
    }

    public void testOfferNull(){
        try {
            DelayQueue q = new DelayQueue();
            q.offer(null);
            fail("should throw NPE");
        } catch (NullPointerException success) { }   
    }

    public void testOffer() {
        DelayQueue q = new DelayQueue();
        assertTrue(q.offer(new PDelay(0)));
        assertTrue(q.offer(new PDelay(1)));
    }

    public void testAdd(){
        DelayQueue q = new DelayQueue();
        for (int i = 0; i < SIZE; ++i) {
            assertEquals(i, q.size());
            assertTrue(q.add(new PDelay(i)));
        }
    }

    public void testAddAll1(){
        try {
            DelayQueue q = new DelayQueue();
            q.addAll(null);
            fail("Cannot add null collection");
        }
        catch (NullPointerException success) {}
    }
    public void testAddAll2(){
        try {
            DelayQueue q = new DelayQueue();
            PDelay[] ints = new PDelay[SIZE];
            q.addAll(Arrays.asList(ints));
            fail("Cannot add null elements");
        }
        catch (NullPointerException success) {}
    }
    public void testAddAll3(){
        try {
            DelayQueue q = new DelayQueue();
            PDelay[] ints = new PDelay[SIZE];
            for (int i = 0; i < SIZE-1; ++i)
                ints[i] = new PDelay(i);
            q.addAll(Arrays.asList(ints));
            fail("Cannot add null elements");
        }
        catch (NullPointerException success) {}
    }

    public void testAddAll5(){
        try {
            PDelay[] empty = new PDelay[0];
            PDelay[] ints = new PDelay[SIZE];
            for (int i = SIZE-1; i >= 0; --i)
                ints[i] = new PDelay(i);
            DelayQueue q = new DelayQueue();
            assertFalse(q.addAll(Arrays.asList(empty)));
            assertTrue(q.addAll(Arrays.asList(ints)));
            for (int i = 0; i < SIZE; ++i)
                assertEquals(ints[i], q.poll());
        }
        finally {}
    }

     public void testPutNull() {
        try {
            DelayQueue q = new DelayQueue();
            q.put(null);
            fail("put should throw NPE");
        } 
        catch (NullPointerException success){
        }   
     }

     public void testPut() {
         try {
             DelayQueue q = new DelayQueue();
             for (int i = 0; i < SIZE; ++i) {
                 PDelay I = new PDelay(i);
                 q.put(I);
                 assertTrue(q.contains(I));
             }
             assertEquals(SIZE, q.size());
         }
         finally {
        }
    }

    public void testPutWithTake() {
        final DelayQueue q = new DelayQueue();
        Thread t = new Thread(new Runnable() {
                public void run(){
                    int added = 0;
                    try {
                        q.put(new PDelay(0));
                        ++added;
                        q.put(new PDelay(0));
                        ++added;
                        q.put(new PDelay(0));
                        ++added;
                        q.put(new PDelay(0));
                        ++added;
                        threadAssertTrue(added == 4);
                    } finally {
                    }
                }
            });
        try {
            t.start();
            Thread.sleep(SHORT_DELAY_MS);
            q.take();
            t.interrupt();
            t.join();
        } catch (Exception e){
            fail("Unexpected exception");
        }
    }

    public void testTimedOffer() {
        final DelayQueue q = new DelayQueue();
        Thread t = new Thread(new Runnable() {
                public void run(){
                    try {
                        q.put(new PDelay(0));
                        q.put(new PDelay(0));
                        threadAssertTrue(q.offer(new PDelay(0), SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
                        threadAssertTrue(q.offer(new PDelay(0), LONG_DELAY_MS, TimeUnit.MILLISECONDS));
                    } finally { }
                }
            });
        
        try {
            t.start();
            Thread.sleep(SMALL_DELAY_MS);
            t.interrupt();
            t.join();
        } catch (Exception e){
            fail("Unexpected exception");
        }
    }

    public void testTake(){
        try {
            DelayQueue q = populatedQueue(SIZE);
            for (int i = 0; i < SIZE; ++i) {
                assertEquals(new PDelay(i), ((PDelay)q.take()));
            }
        } catch (InterruptedException e){
            fail("Unexpected exception");
        }   
    }

    public void testTakeFromEmpty() {
        final DelayQueue q = new DelayQueue();
        Thread t = new Thread(new Runnable() {
                public void run(){
                    try {
                        q.take();
                        threadFail("Should block");
                    } catch (InterruptedException success){ }                
                }
            });
        try {
            t.start();
            Thread.sleep(SHORT_DELAY_MS);
            t.interrupt();
            t.join();
        } catch (Exception e){
            fail("Unexpected exception");
        }
    }

    public void testBlockingTake(){
        Thread t = new Thread(new Runnable() {
                public void run() {
                    try {
                        DelayQueue q = populatedQueue(SIZE);
                        for (int i = 0; i < SIZE; ++i) {
                            threadAssertEquals(new PDelay(i), ((PDelay)q.take()));
                        }
                        q.take();
                        threadFail("take should block");
                    } catch (InterruptedException success){
                    }   
                }});
        t.start();
        try { 
           Thread.sleep(SHORT_DELAY_MS); 
           t.interrupt();
           t.join();
        }
        catch (InterruptedException ie) {
            fail("Unexpected exception");
        }
    }


    public void testPoll(){
        DelayQueue q = populatedQueue(SIZE);
        for (int i = 0; i < SIZE; ++i) {
            assertEquals(new PDelay(i), ((PDelay)q.poll()));
        }
        assertNull(q.poll());
    }

    public void testTimedPoll0() {
        try {
            DelayQueue q = populatedQueue(SIZE);
            for (int i = 0; i < SIZE; ++i) {
                assertEquals(new PDelay(i), ((PDelay)q.poll(0, TimeUnit.MILLISECONDS)));
            }
            assertNull(q.poll(0, TimeUnit.MILLISECONDS));
        } catch (InterruptedException e){
            fail("Unexpected exception");
        }   
    }

    public void testTimedPoll() {
        try {
            DelayQueue q = populatedQueue(SIZE);
            for (int i = 0; i < SIZE; ++i) {
                assertEquals(new PDelay(i), ((PDelay)q.poll(SHORT_DELAY_MS, TimeUnit.MILLISECONDS)));
            }
            assertNull(q.poll(SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
        } catch (InterruptedException e){
            fail("Unexpected exception");
        }   
    }

    public void testInterruptedTimedPoll(){
        Thread t = new Thread(new Runnable() {
                public void run() {
                    try {
                        DelayQueue q = populatedQueue(SIZE);
                        for (int i = 0; i < SIZE; ++i) {
                            threadAssertEquals(new PDelay(i), ((PDelay)q.poll(SHORT_DELAY_MS, TimeUnit.MILLISECONDS)));
                        }
                        threadAssertNull(q.poll(SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
                    } catch (InterruptedException success){
                    }   
                }});
        t.start();
        try { 
           Thread.sleep(SHORT_DELAY_MS); 
           t.interrupt();
           t.join();
        }
        catch (InterruptedException ie) {
            fail("Unexpected exception");
        }
    }

    public void testTimedPollWithOffer(){
        final DelayQueue q = new DelayQueue();
        Thread t = new Thread(new Runnable() {
                public void run(){
                    try {
                        threadAssertNull(q.poll(SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
                        q.poll(LONG_DELAY_MS, TimeUnit.MILLISECONDS);
                        q.poll(LONG_DELAY_MS, TimeUnit.MILLISECONDS);
                        threadFail("Should block");
                    } catch (InterruptedException success) { }                
                }
            });
        try {
            t.start();
            Thread.sleep(SMALL_DELAY_MS);
            assertTrue(q.offer(new PDelay(0), SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
            t.interrupt();
            t.join();
        } catch (Exception e){
            fail("Unexpected exception");
        }
    }  


    public void testPeek(){
        DelayQueue q = populatedQueue(SIZE);
        for (int i = 0; i < SIZE; ++i) {
            assertEquals(new PDelay(i), ((PDelay)q.peek()));
            q.poll();
            assertTrue(q.peek() == null ||
                       i != ((PDelay)q.peek()).intValue());
        }
        assertNull(q.peek());
    }

    public void testElement(){
        DelayQueue q = populatedQueue(SIZE);
        for (int i = 0; i < SIZE; ++i) {
            assertEquals(new PDelay(i), ((PDelay)q.element()));
            q.poll();
        }
        try {
            q.element();
            fail("no such element");
        }
        catch (NoSuchElementException success) {}
    }

    public void testRemove(){
        DelayQueue q = populatedQueue(SIZE);
        for (int i = 0; i < SIZE; ++i) {
            assertEquals(new PDelay(i), ((PDelay)q.remove()));
        }
        try {
            q.remove();
            fail("remove should throw");
        } catch (NoSuchElementException success){
        }   
    }

    public void testRemoveElement(){
        DelayQueue q = populatedQueue(SIZE);
        for (int i = 1; i < SIZE; i+=2) {
            assertTrue(q.remove(new PDelay(i)));
        }
        for (int i = 0; i < SIZE; i+=2) {
            assertTrue(q.remove(new PDelay(i)));
            assertFalse(q.remove(new PDelay(i+1)));
        }
        assertTrue(q.isEmpty());
    }
        
    public void testContains(){
        DelayQueue q = populatedQueue(SIZE);
        for (int i = 0; i < SIZE; ++i) {
            assertTrue(q.contains(new PDelay(i)));
            q.poll();
            assertFalse(q.contains(new PDelay(i)));
        }
    }

    public void testClear(){
        DelayQueue q = populatedQueue(SIZE);
        q.clear();
        assertTrue(q.isEmpty());
        assertEquals(0, q.size());
        assertEquals(NOCAP, q.remainingCapacity());
        q.add(new PDelay(1));
        assertFalse(q.isEmpty());
        q.clear();
        assertTrue(q.isEmpty());
    }

    public void testContainsAll(){
        DelayQueue q = populatedQueue(SIZE);
        DelayQueue p = new DelayQueue();
        for (int i = 0; i < SIZE; ++i) {
            assertTrue(q.containsAll(p));
            assertFalse(p.containsAll(q));
            p.add(new PDelay(i));
        }
        assertTrue(p.containsAll(q));
    }

    public void testRetainAll(){
        DelayQueue q = populatedQueue(SIZE);
        DelayQueue p = populatedQueue(SIZE);
        for (int i = 0; i < SIZE; ++i) {
            boolean changed = q.retainAll(p);
            if (i == 0)
                assertFalse(changed);
            else
                assertTrue(changed);

            assertTrue(q.containsAll(p));
            assertEquals(SIZE-i, q.size());
            p.remove();
        }
    }

    public void testRemoveAll(){
        for (int i = 1; i < SIZE; ++i) {
            DelayQueue q = populatedQueue(SIZE);
            DelayQueue p = populatedQueue(i);
            assertTrue(q.removeAll(p));
            assertEquals(SIZE-i, q.size());
            for (int j = 0; j < i; ++j) {
                PDelay I = (PDelay)(p.remove());
                assertFalse(q.contains(I));
            }
        }
    }

    public void testToArray(){
        DelayQueue q = populatedQueue(SIZE);
        Object[] o = q.toArray();
        Arrays.sort(o);
        try {
        for(int i = 0; i < o.length; i++)
            assertEquals(o[i], q.take());
        } catch (InterruptedException e){
            fail("Unexpected exception");
        }    
    }

    public void testToArray2(){
        DelayQueue q = populatedQueue(SIZE);
        PDelay[] ints = new PDelay[SIZE];
        ints = (PDelay[])q.toArray(ints);
        Arrays.sort(ints);
        try {
            for(int i = 0; i < ints.length; i++)
                assertEquals(ints[i], q.take());
        } catch (InterruptedException e){
            fail("Unexpected exception");
        }    
    }
    
    public void testIterator(){
        DelayQueue q = populatedQueue(SIZE);
        int i = 0;
        Iterator it = q.iterator();
        while(it.hasNext()) {
            assertTrue(q.contains(it.next()));
            ++i;
        }
        assertEquals(i, SIZE);
    }

    public void testIteratorRemove () {

        final DelayQueue q = new DelayQueue();

        q.add(new PDelay(2));
        q.add(new PDelay(1));
        q.add(new PDelay(3));

        Iterator it = q.iterator();
        it.next();
        it.remove();

        it = q.iterator();
        assertEquals(it.next(), new PDelay(2));
        assertEquals(it.next(), new PDelay(3));
        assertFalse(it.hasNext());
    }


    public void testToString(){
        DelayQueue q = populatedQueue(SIZE);
        String s = q.toString();
        for (int i = 0; i < SIZE; ++i) {
            assertTrue(s.indexOf(String.valueOf(Integer.MIN_VALUE+i)) >= 0);
        }
    }        

    public void testPollInExecutor() {

        final DelayQueue q = new DelayQueue();

        ExecutorService executor = Executors.newFixedThreadPool(2);

        executor.execute(new Runnable() {
            public void run() {
                threadAssertNull(q.poll());
                try {
                    threadAssertTrue(null != q.poll(MEDIUM_DELAY_MS, TimeUnit.MILLISECONDS));
                    threadAssertTrue(q.isEmpty());
                }
                catch (InterruptedException e) {
                    threadFail("should not be interrupted");
                }
            }
        });

        executor.execute(new Runnable() {
            public void run() {
                try {
                    Thread.sleep(SHORT_DELAY_MS);
                    q.put(new PDelay(1));
                }
                catch (InterruptedException e) {
                    threadFail("should not be interrupted");
                }
            }
        });
        
        joinPool(executor);

    }

    static class NanoDelay implements Delayed { 
        long trigger;
        NanoDelay(long i) { 
            trigger = System.nanoTime() + i;
        }
        public int compareTo(Object y) {
            long i = trigger;
            long j = ((NanoDelay)y).trigger;
            if (i < j) return -1;
            if (i > j) return 1;
            return 0;
        }

        public int compareTo(NanoDelay y) {
            long i = trigger;
            long j = ((NanoDelay)y).trigger;
            if (i < j) return -1;
            if (i > j) return 1;
            return 0;
        }

        public boolean equals(Object other) {
            return ((NanoDelay)other).trigger == trigger;
        }
        public boolean equals(NanoDelay other) {
            return ((NanoDelay)other).trigger == trigger;
        }

        public long getDelay(TimeUnit unit) {
            long n = trigger - System.nanoTime();
            return unit.convert(n, TimeUnit.NANOSECONDS);
        }

        public long getTriggerTime() {
            return trigger;
        }

        public String toString() {
            return String.valueOf(trigger);
        }
    }

    public void testDelay() {
        DelayQueue q = new DelayQueue();
        NanoDelay[] elements = new NanoDelay[SIZE];
        for (int i = 0; i < SIZE; ++i) {
            elements[i] = new NanoDelay(1000000000L + 1000000L * (SIZE - i));
        }
        for (int i = 0; i < SIZE; ++i) {
            q.add(elements[i]);
        }

        try {
            long last = 0;
            for (int i = 0; i < SIZE; ++i) {
                NanoDelay e = (NanoDelay)(q.take());
                long tt = e.getTriggerTime();
                assertTrue(tt <= System.nanoTime());
                if (i != 0) 
                    assertTrue(tt >= last);
                last = tt;
            }
        }
        catch(InterruptedException ie) {
            fail("Unexpected Exception");
        }
    }

}
Revision:	1.3
Committed:	Sun Sep 14 20:42:40 2003 UTC (20 years, 7 months ago) by dl
Branch:	MAIN
Changes since 1.2:	+89 -112 lines
Log Message:	New base class JSR166TestCase
#	User	Rev	Content
1	dl	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.
6			*/
7
8			import junit.framework.*;
9			import java.util.*;
10			import java.util.concurrent.*;
11
12	dl	1.3	public class DelayQueueTest extends JSR166TestCase {
13	dl	1.1	public static void main(String[] args) {
14			junit.textui.TestRunner.run (suite());
15			}
16
17			public static Test suite() {
18			return new TestSuite(DelayQueueTest.class);
19			}
20
21	dl	1.3	private static final int NOCAP = Integer.MAX_VALUE;
22
23	dl	1.1	// Most Q/BQ tests use Pseudodelays, where delays are all elapsed
24			// (so, no blocking solely for delays) but are still ordered
25
26			static class PDelay implements Delayed {
27			int pseudodelay;
28			PDelay(int i) { pseudodelay = Integer.MIN_VALUE + i; }
29			public int compareTo(Object y) {
30			int i = pseudodelay;
31			int j = ((PDelay)y).pseudodelay;
32			if (i < j) return -1;
33			if (i > j) return 1;
34			return 0;
35			}
36
37			public int compareTo(PDelay y) {
38			int i = pseudodelay;
39			int j = ((PDelay)y).pseudodelay;
40			if (i < j) return -1;
41			if (i > j) return 1;
42			return 0;
43			}
44
45			public boolean equals(Object other) {
46			return ((PDelay)other).pseudodelay == pseudodelay;
47			}
48			public boolean equals(PDelay other) {
49			return ((PDelay)other).pseudodelay == pseudodelay;
50			}
51
52
53			public long getDelay(TimeUnit ignore) {
54			return pseudodelay;
55			}
56			public int intValue() {
57			return pseudodelay;
58			}
59
60			public String toString() {
61			return String.valueOf(pseudodelay);
62			}
63			}
64
65
66
67
68			/**
69			* Create a queue of given size containing consecutive
70			* PDelays 0 ... n.
71			*/
72	dl	1.3	private DelayQueue populatedQueue(int n) {
73	dl	1.1	DelayQueue q = new DelayQueue();
74			assertTrue(q.isEmpty());
75			for(int i = n-1; i >= 0; i-=2)
76			assertTrue(q.offer(new PDelay(i)));
77			for(int i = (n & 1); i < n; i+=2)
78			assertTrue(q.offer(new PDelay(i)));
79			assertFalse(q.isEmpty());
80			assertEquals(NOCAP, q.remainingCapacity());
81			assertEquals(n, q.size());
82			return q;
83			}
84
85			public void testConstructor1(){
86			assertEquals(NOCAP, new DelayQueue().remainingCapacity());
87			}
88
89			public void testConstructor3(){
90
91			try {
92			DelayQueue q = new DelayQueue(null);
93			fail("Cannot make from null collection");
94			}
95			catch (NullPointerException success) {}
96			}
97
98			public void testConstructor4(){
99			try {
100	dl	1.3	PDelay[] ints = new PDelay[SIZE];
101	dl	1.1	DelayQueue q = new DelayQueue(Arrays.asList(ints));
102			fail("Cannot make with null elements");
103			}
104			catch (NullPointerException success) {}
105			}
106
107			public void testConstructor5(){
108			try {
109	dl	1.3	PDelay[] ints = new PDelay[SIZE];
110			for (int i = 0; i < SIZE-1; ++i)
111	dl	1.1	ints[i] = new PDelay(i);
112			DelayQueue q = new DelayQueue(Arrays.asList(ints));
113			fail("Cannot make with null elements");
114			}
115			catch (NullPointerException success) {}
116			}
117
118			public void testConstructor6(){
119			try {
120	dl	1.3	PDelay[] ints = new PDelay[SIZE];
121			for (int i = 0; i < SIZE; ++i)
122	dl	1.1	ints[i] = new PDelay(i);
123			DelayQueue q = new DelayQueue(Arrays.asList(ints));
124	dl	1.3	for (int i = 0; i < SIZE; ++i)
125	dl	1.1	assertEquals(ints[i], q.poll());
126			}
127			finally {}
128			}
129
130			public void testEmpty() {
131			DelayQueue q = new DelayQueue();
132			assertTrue(q.isEmpty());
133			assertEquals(NOCAP, q.remainingCapacity());
134			q.add(new PDelay(1));
135			assertFalse(q.isEmpty());
136			q.add(new PDelay(2));
137			q.remove();
138			q.remove();
139			assertTrue(q.isEmpty());
140			}
141
142			public void testRemainingCapacity(){
143	dl	1.3	DelayQueue q = populatedQueue(SIZE);
144			for (int i = 0; i < SIZE; ++i) {
145	dl	1.1	assertEquals(NOCAP, q.remainingCapacity());
146	dl	1.3	assertEquals(SIZE-i, q.size());
147	dl	1.1	q.remove();
148			}
149	dl	1.3	for (int i = 0; i < SIZE; ++i) {
150	dl	1.1	assertEquals(NOCAP, q.remainingCapacity());
151			assertEquals(i, q.size());
152			q.add(new PDelay(i));
153			}
154			}
155
156			public void testOfferNull(){
157			try {
158			DelayQueue q = new DelayQueue();
159			q.offer(null);
160			fail("should throw NPE");
161			} catch (NullPointerException success) { }
162			}
163
164			public void testOffer() {
165			DelayQueue q = new DelayQueue();
166			assertTrue(q.offer(new PDelay(0)));
167			assertTrue(q.offer(new PDelay(1)));
168			}
169
170			public void testAdd(){
171			DelayQueue q = new DelayQueue();
172	dl	1.3	for (int i = 0; i < SIZE; ++i) {
173	dl	1.1	assertEquals(i, q.size());
174			assertTrue(q.add(new PDelay(i)));
175			}
176			}
177
178			public void testAddAll1(){
179			try {
180			DelayQueue q = new DelayQueue();
181			q.addAll(null);
182			fail("Cannot add null collection");
183			}
184			catch (NullPointerException success) {}
185			}
186			public void testAddAll2(){
187			try {
188			DelayQueue q = new DelayQueue();
189	dl	1.3	PDelay[] ints = new PDelay[SIZE];
190	dl	1.1	q.addAll(Arrays.asList(ints));
191			fail("Cannot add null elements");
192			}
193			catch (NullPointerException success) {}
194			}
195			public void testAddAll3(){
196			try {
197			DelayQueue q = new DelayQueue();
198	dl	1.3	PDelay[] ints = new PDelay[SIZE];
199			for (int i = 0; i < SIZE-1; ++i)
200	dl	1.1	ints[i] = new PDelay(i);
201			q.addAll(Arrays.asList(ints));
202			fail("Cannot add null elements");
203			}
204			catch (NullPointerException success) {}
205			}
206
207			public void testAddAll5(){
208			try {
209			PDelay[] empty = new PDelay[0];
210	dl	1.3	PDelay[] ints = new PDelay[SIZE];
211			for (int i = SIZE-1; i >= 0; --i)
212	dl	1.1	ints[i] = new PDelay(i);
213			DelayQueue q = new DelayQueue();
214			assertFalse(q.addAll(Arrays.asList(empty)));
215			assertTrue(q.addAll(Arrays.asList(ints)));
216	dl	1.3	for (int i = 0; i < SIZE; ++i)
217	dl	1.1	assertEquals(ints[i], q.poll());
218			}
219			finally {}
220			}
221
222			public void testPutNull() {
223			try {
224			DelayQueue q = new DelayQueue();
225			q.put(null);
226			fail("put should throw NPE");
227			}
228			catch (NullPointerException success){
229			}
230			}
231
232			public void testPut() {
233			try {
234			DelayQueue q = new DelayQueue();
235	dl	1.3	for (int i = 0; i < SIZE; ++i) {
236	dl	1.1	PDelay I = new PDelay(i);
237			q.put(I);
238			assertTrue(q.contains(I));
239			}
240	dl	1.3	assertEquals(SIZE, q.size());
241	dl	1.1	}
242			finally {
243			}
244			}
245
246			public void testPutWithTake() {
247			final DelayQueue q = new DelayQueue();
248			Thread t = new Thread(new Runnable() {
249			public void run(){
250			int added = 0;
251			try {
252			q.put(new PDelay(0));
253			++added;
254			q.put(new PDelay(0));
255			++added;
256			q.put(new PDelay(0));
257			++added;
258			q.put(new PDelay(0));
259			++added;
260	dl	1.3	threadAssertTrue(added == 4);
261	dl	1.1	} finally {
262			}
263			}
264			});
265			try {
266			t.start();
267			Thread.sleep(SHORT_DELAY_MS);
268			q.take();
269			t.interrupt();
270			t.join();
271			} catch (Exception e){
272			fail("Unexpected exception");
273			}
274			}
275
276			public void testTimedOffer() {
277			final DelayQueue q = new DelayQueue();
278			Thread t = new Thread(new Runnable() {
279			public void run(){
280			try {
281			q.put(new PDelay(0));
282			q.put(new PDelay(0));
283	dl	1.3	threadAssertTrue(q.offer(new PDelay(0), SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
284			threadAssertTrue(q.offer(new PDelay(0), LONG_DELAY_MS, TimeUnit.MILLISECONDS));
285	dl	1.1	} finally { }
286			}
287			});
288
289			try {
290			t.start();
291	dl	1.3	Thread.sleep(SMALL_DELAY_MS);
292	dl	1.1	t.interrupt();
293			t.join();
294			} catch (Exception e){
295			fail("Unexpected exception");
296			}
297			}
298
299			public void testTake(){
300			try {
301	dl	1.3	DelayQueue q = populatedQueue(SIZE);
302			for (int i = 0; i < SIZE; ++i) {
303	dl	1.1	assertEquals(new PDelay(i), ((PDelay)q.take()));
304			}
305			} catch (InterruptedException e){
306			fail("Unexpected exception");
307			}
308			}
309
310			public void testTakeFromEmpty() {
311			final DelayQueue q = new DelayQueue();
312			Thread t = new Thread(new Runnable() {
313			public void run(){
314			try {
315			q.take();
316	dl	1.3	threadFail("Should block");
317	dl	1.1	} catch (InterruptedException success){ }
318			}
319			});
320			try {
321			t.start();
322			Thread.sleep(SHORT_DELAY_MS);
323			t.interrupt();
324			t.join();
325			} catch (Exception e){
326			fail("Unexpected exception");
327			}
328			}
329
330			public void testBlockingTake(){
331			Thread t = new Thread(new Runnable() {
332			public void run() {
333			try {
334	dl	1.3	DelayQueue q = populatedQueue(SIZE);
335			for (int i = 0; i < SIZE; ++i) {
336			threadAssertEquals(new PDelay(i), ((PDelay)q.take()));
337	dl	1.1	}
338			q.take();
339	dl	1.3	threadFail("take should block");
340	dl	1.1	} catch (InterruptedException success){
341			}
342			}});
343			t.start();
344			try {
345			Thread.sleep(SHORT_DELAY_MS);
346			t.interrupt();
347			t.join();
348			}
349			catch (InterruptedException ie) {
350			fail("Unexpected exception");
351			}
352			}
353
354
355			public void testPoll(){
356	dl	1.3	DelayQueue q = populatedQueue(SIZE);
357			for (int i = 0; i < SIZE; ++i) {
358	dl	1.1	assertEquals(new PDelay(i), ((PDelay)q.poll()));
359			}
360			assertNull(q.poll());
361			}
362
363			public void testTimedPoll0() {
364			try {
365	dl	1.3	DelayQueue q = populatedQueue(SIZE);
366			for (int i = 0; i < SIZE; ++i) {
367	dl	1.1	assertEquals(new PDelay(i), ((PDelay)q.poll(0, TimeUnit.MILLISECONDS)));
368			}
369			assertNull(q.poll(0, TimeUnit.MILLISECONDS));
370			} catch (InterruptedException e){
371			fail("Unexpected exception");
372			}
373			}
374
375			public void testTimedPoll() {
376			try {
377	dl	1.3	DelayQueue q = populatedQueue(SIZE);
378			for (int i = 0; i < SIZE; ++i) {
379	dl	1.1	assertEquals(new PDelay(i), ((PDelay)q.poll(SHORT_DELAY_MS, TimeUnit.MILLISECONDS)));
380			}
381			assertNull(q.poll(SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
382			} catch (InterruptedException e){
383			fail("Unexpected exception");
384			}
385			}
386
387			public void testInterruptedTimedPoll(){
388			Thread t = new Thread(new Runnable() {
389			public void run() {
390			try {
391	dl	1.3	DelayQueue q = populatedQueue(SIZE);
392			for (int i = 0; i < SIZE; ++i) {
393			threadAssertEquals(new PDelay(i), ((PDelay)q.poll(SHORT_DELAY_MS, TimeUnit.MILLISECONDS)));
394	dl	1.1	}
395	dl	1.3	threadAssertNull(q.poll(SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
396	dl	1.1	} catch (InterruptedException success){
397			}
398			}});
399			t.start();
400			try {
401			Thread.sleep(SHORT_DELAY_MS);
402			t.interrupt();
403			t.join();
404			}
405			catch (InterruptedException ie) {
406			fail("Unexpected exception");
407			}
408			}
409
410			public void testTimedPollWithOffer(){
411			final DelayQueue q = new DelayQueue();
412			Thread t = new Thread(new Runnable() {
413			public void run(){
414			try {
415	dl	1.3	threadAssertNull(q.poll(SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
416	dl	1.1	q.poll(LONG_DELAY_MS, TimeUnit.MILLISECONDS);
417			q.poll(LONG_DELAY_MS, TimeUnit.MILLISECONDS);
418	dl	1.3	threadFail("Should block");
419	dl	1.1	} catch (InterruptedException success) { }
420			}
421			});
422			try {
423			t.start();
424	dl	1.3	Thread.sleep(SMALL_DELAY_MS);
425	dl	1.1	assertTrue(q.offer(new PDelay(0), SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
426			t.interrupt();
427			t.join();
428			} catch (Exception e){
429			fail("Unexpected exception");
430			}
431			}
432
433
434			public void testPeek(){
435	dl	1.3	DelayQueue q = populatedQueue(SIZE);
436			for (int i = 0; i < SIZE; ++i) {
437	dl	1.1	assertEquals(new PDelay(i), ((PDelay)q.peek()));
438			q.poll();
439			assertTrue(q.peek() == null \|\|
440			i != ((PDelay)q.peek()).intValue());
441			}
442			assertNull(q.peek());
443			}
444
445			public void testElement(){
446	dl	1.3	DelayQueue q = populatedQueue(SIZE);
447			for (int i = 0; i < SIZE; ++i) {
448	dl	1.1	assertEquals(new PDelay(i), ((PDelay)q.element()));
449			q.poll();
450			}
451			try {
452			q.element();
453			fail("no such element");
454			}
455			catch (NoSuchElementException success) {}
456			}
457
458			public void testRemove(){
459	dl	1.3	DelayQueue q = populatedQueue(SIZE);
460			for (int i = 0; i < SIZE; ++i) {
461	dl	1.1	assertEquals(new PDelay(i), ((PDelay)q.remove()));
462			}
463			try {
464			q.remove();
465			fail("remove should throw");
466			} catch (NoSuchElementException success){
467			}
468			}
469
470			public void testRemoveElement(){
471	dl	1.3	DelayQueue q = populatedQueue(SIZE);
472			for (int i = 1; i < SIZE; i+=2) {
473	dl	1.1	assertTrue(q.remove(new PDelay(i)));
474			}
475	dl	1.3	for (int i = 0; i < SIZE; i+=2) {
476	dl	1.1	assertTrue(q.remove(new PDelay(i)));
477			assertFalse(q.remove(new PDelay(i+1)));
478			}
479	dl	1.2	assertTrue(q.isEmpty());
480	dl	1.1	}
481
482			public void testContains(){
483	dl	1.3	DelayQueue q = populatedQueue(SIZE);
484			for (int i = 0; i < SIZE; ++i) {
485	dl	1.1	assertTrue(q.contains(new PDelay(i)));
486			q.poll();
487			assertFalse(q.contains(new PDelay(i)));
488			}
489			}
490
491			public void testClear(){
492	dl	1.3	DelayQueue q = populatedQueue(SIZE);
493	dl	1.1	q.clear();
494			assertTrue(q.isEmpty());
495			assertEquals(0, q.size());
496			assertEquals(NOCAP, q.remainingCapacity());
497			q.add(new PDelay(1));
498			assertFalse(q.isEmpty());
499			q.clear();
500			assertTrue(q.isEmpty());
501			}
502
503			public void testContainsAll(){
504	dl	1.3	DelayQueue q = populatedQueue(SIZE);
505	dl	1.1	DelayQueue p = new DelayQueue();
506	dl	1.3	for (int i = 0; i < SIZE; ++i) {
507	dl	1.1	assertTrue(q.containsAll(p));
508			assertFalse(p.containsAll(q));
509			p.add(new PDelay(i));
510			}
511			assertTrue(p.containsAll(q));
512			}
513
514			public void testRetainAll(){
515	dl	1.3	DelayQueue q = populatedQueue(SIZE);
516			DelayQueue p = populatedQueue(SIZE);
517			for (int i = 0; i < SIZE; ++i) {
518	dl	1.1	boolean changed = q.retainAll(p);
519			if (i == 0)
520			assertFalse(changed);
521			else
522			assertTrue(changed);
523
524			assertTrue(q.containsAll(p));
525	dl	1.3	assertEquals(SIZE-i, q.size());
526	dl	1.1	p.remove();
527			}
528			}
529
530			public void testRemoveAll(){
531	dl	1.3	for (int i = 1; i < SIZE; ++i) {
532			DelayQueue q = populatedQueue(SIZE);
533			DelayQueue p = populatedQueue(i);
534	dl	1.1	assertTrue(q.removeAll(p));
535	dl	1.3	assertEquals(SIZE-i, q.size());
536	dl	1.1	for (int j = 0; j < i; ++j) {
537			PDelay I = (PDelay)(p.remove());
538			assertFalse(q.contains(I));
539			}
540			}
541			}
542
543			public void testToArray(){
544	dl	1.3	DelayQueue q = populatedQueue(SIZE);
545	dl	1.1	Object[] o = q.toArray();
546			Arrays.sort(o);
547			try {
548			for(int i = 0; i < o.length; i++)
549			assertEquals(o[i], q.take());
550			} catch (InterruptedException e){
551			fail("Unexpected exception");
552			}
553			}
554
555			public void testToArray2(){
556	dl	1.3	DelayQueue q = populatedQueue(SIZE);
557			PDelay[] ints = new PDelay[SIZE];
558	dl	1.1	ints = (PDelay[])q.toArray(ints);
559			Arrays.sort(ints);
560			try {
561			for(int i = 0; i < ints.length; i++)
562			assertEquals(ints[i], q.take());
563			} catch (InterruptedException e){
564			fail("Unexpected exception");
565			}
566			}
567
568			public void testIterator(){
569	dl	1.3	DelayQueue q = populatedQueue(SIZE);
570	dl	1.1	int i = 0;
571			Iterator it = q.iterator();
572			while(it.hasNext()) {
573			assertTrue(q.contains(it.next()));
574			++i;
575			}
576	dl	1.3	assertEquals(i, SIZE);
577	dl	1.1	}
578
579			public void testIteratorRemove () {
580
581			final DelayQueue q = new DelayQueue();
582
583			q.add(new PDelay(2));
584			q.add(new PDelay(1));
585			q.add(new PDelay(3));
586
587			Iterator it = q.iterator();
588			it.next();
589			it.remove();
590
591			it = q.iterator();
592			assertEquals(it.next(), new PDelay(2));
593			assertEquals(it.next(), new PDelay(3));
594			assertFalse(it.hasNext());
595			}
596
597
598			public void testToString(){
599	dl	1.3	DelayQueue q = populatedQueue(SIZE);
600	dl	1.1	String s = q.toString();
601	dl	1.3	for (int i = 0; i < SIZE; ++i) {
602			assertTrue(s.indexOf(String.valueOf(Integer.MIN_VALUE+i)) >= 0);
603	dl	1.1	}
604			}
605
606			public void testPollInExecutor() {
607
608			final DelayQueue q = new DelayQueue();
609
610			ExecutorService executor = Executors.newFixedThreadPool(2);
611
612			executor.execute(new Runnable() {
613			public void run() {
614	dl	1.3	threadAssertNull(q.poll());
615	dl	1.1	try {
616	dl	1.3	threadAssertTrue(null != q.poll(MEDIUM_DELAY_MS, TimeUnit.MILLISECONDS));
617			threadAssertTrue(q.isEmpty());
618	dl	1.1	}
619			catch (InterruptedException e) {
620	dl	1.3	threadFail("should not be interrupted");
621	dl	1.1	}
622			}
623			});
624
625			executor.execute(new Runnable() {
626			public void run() {
627			try {
628	dl	1.3	Thread.sleep(SHORT_DELAY_MS);
629	dl	1.1	q.put(new PDelay(1));
630			}
631			catch (InterruptedException e) {
632	dl	1.3	threadFail("should not be interrupted");
633	dl	1.1	}
634			}
635			});
636
637	dl	1.3	joinPool(executor);
638	dl	1.1
639			}
640
641			static class NanoDelay implements Delayed {
642			long trigger;
643			NanoDelay(long i) {
644			trigger = System.nanoTime() + i;
645			}
646			public int compareTo(Object y) {
647			long i = trigger;
648			long j = ((NanoDelay)y).trigger;
649			if (i < j) return -1;
650			if (i > j) return 1;
651			return 0;
652			}
653
654			public int compareTo(NanoDelay y) {
655			long i = trigger;
656			long j = ((NanoDelay)y).trigger;
657			if (i < j) return -1;
658			if (i > j) return 1;
659			return 0;
660			}
661
662			public boolean equals(Object other) {
663			return ((NanoDelay)other).trigger == trigger;
664			}
665			public boolean equals(NanoDelay other) {
666			return ((NanoDelay)other).trigger == trigger;
667			}
668
669			public long getDelay(TimeUnit unit) {
670			long n = trigger - System.nanoTime();
671			return unit.convert(n, TimeUnit.NANOSECONDS);
672			}
673
674			public long getTriggerTime() {
675			return trigger;
676			}
677
678			public String toString() {
679			return String.valueOf(trigger);
680			}
681			}
682
683			public void testDelay() {
684			DelayQueue q = new DelayQueue();
685	dl	1.3	NanoDelay[] elements = new NanoDelay[SIZE];
686			for (int i = 0; i < SIZE; ++i) {
687			elements[i] = new NanoDelay(1000000000L + 1000000L * (SIZE - i));
688	dl	1.1	}
689	dl	1.3	for (int i = 0; i < SIZE; ++i) {
690	dl	1.1	q.add(elements[i]);
691			}
692
693			try {
694			long last = 0;
695	dl	1.3	for (int i = 0; i < SIZE; ++i) {
696	dl	1.1	NanoDelay e = (NanoDelay)(q.take());
697			long tt = e.getTriggerTime();
698			assertTrue(tt <= System.nanoTime());
699			if (i != 0)
700			assertTrue(tt >= last);
701			last = tt;
702			}
703			}
704			catch(InterruptedException ie) {
705			fail("Unexpected Exception");
706			}
707			}
708
709			}