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
#	Content
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	public class DelayQueueTest extends JSR166TestCase {
13	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	private static final int NOCAP = Integer.MAX_VALUE;
22
23	// 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	private DelayQueue populatedQueue(int n) {
73	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	PDelay[] ints = new PDelay[SIZE];
101	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	PDelay[] ints = new PDelay[SIZE];
110	for (int i = 0; i < SIZE-1; ++i)
111	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	PDelay[] ints = new PDelay[SIZE];
121	for (int i = 0; i < SIZE; ++i)
122	ints[i] = new PDelay(i);
123	DelayQueue q = new DelayQueue(Arrays.asList(ints));
124	for (int i = 0; i < SIZE; ++i)
125	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	DelayQueue q = populatedQueue(SIZE);
144	for (int i = 0; i < SIZE; ++i) {
145	assertEquals(NOCAP, q.remainingCapacity());
146	assertEquals(SIZE-i, q.size());
147	q.remove();
148	}
149	for (int i = 0; i < SIZE; ++i) {
150	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	for (int i = 0; i < SIZE; ++i) {
173	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	PDelay[] ints = new PDelay[SIZE];
190	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	PDelay[] ints = new PDelay[SIZE];
199	for (int i = 0; i < SIZE-1; ++i)
200	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	PDelay[] ints = new PDelay[SIZE];
211	for (int i = SIZE-1; i >= 0; --i)
212	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	for (int i = 0; i < SIZE; ++i)
217	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	for (int i = 0; i < SIZE; ++i) {
236	PDelay I = new PDelay(i);
237	q.put(I);
238	assertTrue(q.contains(I));
239	}
240	assertEquals(SIZE, q.size());
241	}
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	threadAssertTrue(added == 4);
261	} 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	threadAssertTrue(q.offer(new PDelay(0), SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
284	threadAssertTrue(q.offer(new PDelay(0), LONG_DELAY_MS, TimeUnit.MILLISECONDS));
285	} finally { }
286	}
287	});
288
289	try {
290	t.start();
291	Thread.sleep(SMALL_DELAY_MS);
292	t.interrupt();
293	t.join();
294	} catch (Exception e){
295	fail("Unexpected exception");
296	}
297	}
298
299	public void testTake(){
300	try {
301	DelayQueue q = populatedQueue(SIZE);
302	for (int i = 0; i < SIZE; ++i) {
303	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	threadFail("Should block");
317	} 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	DelayQueue q = populatedQueue(SIZE);
335	for (int i = 0; i < SIZE; ++i) {
336	threadAssertEquals(new PDelay(i), ((PDelay)q.take()));
337	}
338	q.take();
339	threadFail("take should block");
340	} 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	DelayQueue q = populatedQueue(SIZE);
357	for (int i = 0; i < SIZE; ++i) {
358	assertEquals(new PDelay(i), ((PDelay)q.poll()));
359	}
360	assertNull(q.poll());
361	}
362
363	public void testTimedPoll0() {
364	try {
365	DelayQueue q = populatedQueue(SIZE);
366	for (int i = 0; i < SIZE; ++i) {
367	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	DelayQueue q = populatedQueue(SIZE);
378	for (int i = 0; i < SIZE; ++i) {
379	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	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	}
395	threadAssertNull(q.poll(SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
396	} 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	threadAssertNull(q.poll(SHORT_DELAY_MS, TimeUnit.MILLISECONDS));
416	q.poll(LONG_DELAY_MS, TimeUnit.MILLISECONDS);
417	q.poll(LONG_DELAY_MS, TimeUnit.MILLISECONDS);
418	threadFail("Should block");
419	} catch (InterruptedException success) { }
420	}
421	});
422	try {
423	t.start();
424	Thread.sleep(SMALL_DELAY_MS);
425	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	DelayQueue q = populatedQueue(SIZE);
436	for (int i = 0; i < SIZE; ++i) {
437	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	DelayQueue q = populatedQueue(SIZE);
447	for (int i = 0; i < SIZE; ++i) {
448	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	DelayQueue q = populatedQueue(SIZE);
460	for (int i = 0; i < SIZE; ++i) {
461	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	DelayQueue q = populatedQueue(SIZE);
472	for (int i = 1; i < SIZE; i+=2) {
473	assertTrue(q.remove(new PDelay(i)));
474	}
475	for (int i = 0; i < SIZE; i+=2) {
476	assertTrue(q.remove(new PDelay(i)));
477	assertFalse(q.remove(new PDelay(i+1)));
478	}
479	assertTrue(q.isEmpty());
480	}
481
482	public void testContains(){
483	DelayQueue q = populatedQueue(SIZE);
484	for (int i = 0; i < SIZE; ++i) {
485	assertTrue(q.contains(new PDelay(i)));
486	q.poll();
487	assertFalse(q.contains(new PDelay(i)));
488	}
489	}
490
491	public void testClear(){
492	DelayQueue q = populatedQueue(SIZE);
493	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	DelayQueue q = populatedQueue(SIZE);
505	DelayQueue p = new DelayQueue();
506	for (int i = 0; i < SIZE; ++i) {
507	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	DelayQueue q = populatedQueue(SIZE);
516	DelayQueue p = populatedQueue(SIZE);
517	for (int i = 0; i < SIZE; ++i) {
518	boolean changed = q.retainAll(p);
519	if (i == 0)
520	assertFalse(changed);
521	else
522	assertTrue(changed);
523
524	assertTrue(q.containsAll(p));
525	assertEquals(SIZE-i, q.size());
526	p.remove();
527	}
528	}
529
530	public void testRemoveAll(){
531	for (int i = 1; i < SIZE; ++i) {
532	DelayQueue q = populatedQueue(SIZE);
533	DelayQueue p = populatedQueue(i);
534	assertTrue(q.removeAll(p));
535	assertEquals(SIZE-i, q.size());
536	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	DelayQueue q = populatedQueue(SIZE);
545	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	DelayQueue q = populatedQueue(SIZE);
557	PDelay[] ints = new PDelay[SIZE];
558	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	DelayQueue q = populatedQueue(SIZE);
570	int i = 0;
571	Iterator it = q.iterator();
572	while(it.hasNext()) {
573	assertTrue(q.contains(it.next()));
574	++i;
575	}
576	assertEquals(i, SIZE);
577	}
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	DelayQueue q = populatedQueue(SIZE);
600	String s = q.toString();
601	for (int i = 0; i < SIZE; ++i) {
602	assertTrue(s.indexOf(String.valueOf(Integer.MIN_VALUE+i)) >= 0);
603	}
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	threadAssertNull(q.poll());
615	try {
616	threadAssertTrue(null != q.poll(MEDIUM_DELAY_MS, TimeUnit.MILLISECONDS));
617	threadAssertTrue(q.isEmpty());
618	}
619	catch (InterruptedException e) {
620	threadFail("should not be interrupted");
621	}
622	}
623	});
624
625	executor.execute(new Runnable() {
626	public void run() {
627	try {
628	Thread.sleep(SHORT_DELAY_MS);
629	q.put(new PDelay(1));
630	}
631	catch (InterruptedException e) {
632	threadFail("should not be interrupted");
633	}
634	}
635	});
636
637	joinPool(executor);
638
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	NanoDelay[] elements = new NanoDelay[SIZE];
686	for (int i = 0; i < SIZE; ++i) {
687	elements[i] = new NanoDelay(1000000000L + 1000000L * (SIZE - i));
688	}
689	for (int i = 0; i < SIZE; ++i) {
690	q.add(elements[i]);
691	}
692
693	try {
694	long last = 0;
695	for (int i = 0; i < SIZE; ++i) {
696	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	}