1 |
/* |
2 |
* Written by Doug Lea with assistance from members of JCP JSR-166 |
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* Expert Group and released to the public domain, as explained at |
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* http://creativecommons.org/publicdomain/zero/1.0/ |
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* Other contributors include Andrew Wright, Jeffrey Hayes, |
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* Pat Fisher, Mike Judd. |
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*/ |
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|
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import static java.util.concurrent.TimeUnit.MILLISECONDS; |
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|
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import java.util.ArrayList; |
12 |
import java.util.Arrays; |
13 |
import java.util.Collection; |
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import java.util.Iterator; |
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import java.util.NoSuchElementException; |
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import java.util.concurrent.BlockingQueue; |
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import java.util.concurrent.CountDownLatch; |
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import java.util.concurrent.Delayed; |
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import java.util.concurrent.DelayQueue; |
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import java.util.concurrent.Executors; |
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import java.util.concurrent.ExecutorService; |
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import java.util.concurrent.TimeUnit; |
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|
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import junit.framework.Test; |
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|
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public class DelayQueueTest extends JSR166TestCase { |
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|
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public static class Generic extends BlockingQueueTest { |
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protected BlockingQueue emptyCollection() { |
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return new DelayQueue(); |
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} |
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protected PDelay makeElement(int i) { |
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return new PDelay(i); |
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} |
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} |
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|
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public static void main(String[] args) { |
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main(suite(), args); |
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} |
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|
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public static Test suite() { |
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return newTestSuite(DelayQueueTest.class, |
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new Generic().testSuite()); |
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} |
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|
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/** |
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* A delayed implementation for testing. |
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* Most tests use Pseudodelays, where delays are all elapsed |
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* (so, no blocking solely for delays) but are still ordered |
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*/ |
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static class PDelay implements Delayed { |
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int pseudodelay; |
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PDelay(int i) { pseudodelay = i; } |
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public int compareTo(PDelay other) { |
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int a = this.pseudodelay; |
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int b = other.pseudodelay; |
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return (a < b) ? -1 : (a > b) ? 1 : 0; |
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} |
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public int compareTo(Delayed y) { |
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return compareTo((PDelay)y); |
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} |
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public boolean equals(Object other) { |
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return (other instanceof PDelay) && |
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this.pseudodelay == ((PDelay)other).pseudodelay; |
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} |
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// suppress [overrides] javac warning |
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public int hashCode() { return pseudodelay; } |
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public long getDelay(TimeUnit ignore) { |
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return Integer.MIN_VALUE + pseudodelay; |
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} |
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public String toString() { |
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return String.valueOf(pseudodelay); |
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} |
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} |
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|
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/** |
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* Delayed implementation that actually delays |
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*/ |
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static class NanoDelay implements Delayed { |
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long trigger; |
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NanoDelay(long i) { |
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trigger = System.nanoTime() + i; |
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} |
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public int compareTo(NanoDelay y) { |
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long i = trigger; |
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long j = y.trigger; |
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if (i < j) return -1; |
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if (i > j) return 1; |
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return 0; |
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} |
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|
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public int compareTo(Delayed y) { |
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return compareTo((NanoDelay)y); |
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} |
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|
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public boolean equals(Object other) { |
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return (other instanceof NanoDelay) && |
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this.trigger == ((NanoDelay)other).trigger; |
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} |
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|
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// suppress [overrides] javac warning |
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public int hashCode() { return (int) trigger; } |
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|
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public long getDelay(TimeUnit unit) { |
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long n = trigger - System.nanoTime(); |
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return unit.convert(n, TimeUnit.NANOSECONDS); |
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} |
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|
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public long getTriggerTime() { |
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return trigger; |
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} |
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|
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public String toString() { |
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return String.valueOf(trigger); |
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} |
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} |
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|
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/** |
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* Returns a new queue of given size containing consecutive |
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* PDelays 0 ... n. |
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*/ |
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private DelayQueue<PDelay> populatedQueue(int n) { |
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DelayQueue<PDelay> q = new DelayQueue<PDelay>(); |
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assertTrue(q.isEmpty()); |
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for (int i = n - 1; i >= 0; i -= 2) |
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assertTrue(q.offer(new PDelay(i))); |
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for (int i = (n & 1); i < n; i += 2) |
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assertTrue(q.offer(new PDelay(i))); |
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assertFalse(q.isEmpty()); |
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assertEquals(Integer.MAX_VALUE, q.remainingCapacity()); |
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assertEquals(n, q.size()); |
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return q; |
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} |
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|
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/** |
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* A new queue has unbounded capacity |
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*/ |
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public void testConstructor1() { |
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assertEquals(Integer.MAX_VALUE, new DelayQueue().remainingCapacity()); |
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} |
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|
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/** |
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* Initializing from null Collection throws NPE |
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*/ |
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public void testConstructor3() { |
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try { |
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new DelayQueue(null); |
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shouldThrow(); |
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} catch (NullPointerException success) {} |
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} |
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|
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/** |
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* Initializing from Collection of null elements throws NPE |
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*/ |
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public void testConstructor4() { |
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try { |
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new DelayQueue(Arrays.asList(new PDelay[SIZE])); |
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shouldThrow(); |
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} catch (NullPointerException success) {} |
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} |
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|
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/** |
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* Initializing from Collection with some null elements throws NPE |
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*/ |
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public void testConstructor5() { |
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PDelay[] a = new PDelay[SIZE]; |
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for (int i = 0; i < SIZE - 1; ++i) |
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a[i] = new PDelay(i); |
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try { |
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new DelayQueue(Arrays.asList(a)); |
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shouldThrow(); |
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} catch (NullPointerException success) {} |
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} |
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|
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/** |
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* Queue contains all elements of collection used to initialize |
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*/ |
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public void testConstructor6() { |
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PDelay[] ints = new PDelay[SIZE]; |
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for (int i = 0; i < SIZE; ++i) |
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ints[i] = new PDelay(i); |
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DelayQueue q = new DelayQueue(Arrays.asList(ints)); |
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for (int i = 0; i < SIZE; ++i) |
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assertEquals(ints[i], q.poll()); |
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} |
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|
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/** |
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* isEmpty is true before add, false after |
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*/ |
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public void testEmpty() { |
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DelayQueue q = new DelayQueue(); |
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assertTrue(q.isEmpty()); |
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assertEquals(Integer.MAX_VALUE, q.remainingCapacity()); |
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q.add(new PDelay(1)); |
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assertFalse(q.isEmpty()); |
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q.add(new PDelay(2)); |
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q.remove(); |
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q.remove(); |
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assertTrue(q.isEmpty()); |
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} |
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|
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/** |
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* remainingCapacity() always returns Integer.MAX_VALUE |
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*/ |
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public void testRemainingCapacity() { |
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BlockingQueue q = populatedQueue(SIZE); |
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for (int i = 0; i < SIZE; ++i) { |
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assertEquals(Integer.MAX_VALUE, q.remainingCapacity()); |
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assertEquals(SIZE - i, q.size()); |
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assertTrue(q.remove() instanceof PDelay); |
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} |
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for (int i = 0; i < SIZE; ++i) { |
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assertEquals(Integer.MAX_VALUE, q.remainingCapacity()); |
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assertEquals(i, q.size()); |
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assertTrue(q.add(new PDelay(i))); |
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} |
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} |
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|
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/** |
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* offer non-null succeeds |
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*/ |
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public void testOffer() { |
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DelayQueue q = new DelayQueue(); |
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assertTrue(q.offer(new PDelay(0))); |
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assertTrue(q.offer(new PDelay(1))); |
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} |
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|
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/** |
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* add succeeds |
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*/ |
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public void testAdd() { |
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DelayQueue q = new DelayQueue(); |
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for (int i = 0; i < SIZE; ++i) { |
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assertEquals(i, q.size()); |
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assertTrue(q.add(new PDelay(i))); |
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} |
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} |
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|
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/** |
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* addAll(this) throws IAE |
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*/ |
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public void testAddAllSelf() { |
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DelayQueue q = populatedQueue(SIZE); |
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try { |
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q.addAll(q); |
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shouldThrow(); |
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} catch (IllegalArgumentException success) {} |
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} |
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|
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/** |
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* addAll of a collection with any null elements throws NPE after |
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* possibly adding some elements |
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*/ |
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public void testAddAll3() { |
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DelayQueue q = new DelayQueue(); |
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PDelay[] a = new PDelay[SIZE]; |
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for (int i = 0; i < SIZE - 1; ++i) |
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a[i] = new PDelay(i); |
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try { |
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q.addAll(Arrays.asList(a)); |
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shouldThrow(); |
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} catch (NullPointerException success) {} |
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} |
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|
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/** |
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* Queue contains all elements of successful addAll |
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*/ |
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public void testAddAll5() { |
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PDelay[] empty = new PDelay[0]; |
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PDelay[] ints = new PDelay[SIZE]; |
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for (int i = SIZE - 1; i >= 0; --i) |
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ints[i] = new PDelay(i); |
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DelayQueue q = new DelayQueue(); |
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assertFalse(q.addAll(Arrays.asList(empty))); |
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assertTrue(q.addAll(Arrays.asList(ints))); |
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for (int i = 0; i < SIZE; ++i) |
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assertEquals(ints[i], q.poll()); |
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} |
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|
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/** |
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* all elements successfully put are contained |
282 |
*/ |
283 |
public void testPut() { |
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DelayQueue q = new DelayQueue(); |
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for (int i = 0; i < SIZE; ++i) { |
286 |
PDelay x = new PDelay(i); |
287 |
q.put(x); |
288 |
assertTrue(q.contains(x)); |
289 |
} |
290 |
assertEquals(SIZE, q.size()); |
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} |
292 |
|
293 |
/** |
294 |
* put doesn't block waiting for take |
295 |
*/ |
296 |
public void testPutWithTake() throws InterruptedException { |
297 |
final DelayQueue q = new DelayQueue(); |
298 |
Thread t = newStartedThread(new CheckedRunnable() { |
299 |
public void realRun() { |
300 |
q.put(new PDelay(0)); |
301 |
q.put(new PDelay(0)); |
302 |
q.put(new PDelay(0)); |
303 |
q.put(new PDelay(0)); |
304 |
}}); |
305 |
|
306 |
awaitTermination(t); |
307 |
assertEquals(4, q.size()); |
308 |
} |
309 |
|
310 |
/** |
311 |
* timed offer does not time out |
312 |
*/ |
313 |
public void testTimedOffer() throws InterruptedException { |
314 |
final DelayQueue q = new DelayQueue(); |
315 |
Thread t = newStartedThread(new CheckedRunnable() { |
316 |
public void realRun() throws InterruptedException { |
317 |
q.put(new PDelay(0)); |
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q.put(new PDelay(0)); |
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assertTrue(q.offer(new PDelay(0), SHORT_DELAY_MS, MILLISECONDS)); |
320 |
assertTrue(q.offer(new PDelay(0), LONG_DELAY_MS, MILLISECONDS)); |
321 |
}}); |
322 |
|
323 |
awaitTermination(t); |
324 |
} |
325 |
|
326 |
/** |
327 |
* take retrieves elements in priority order |
328 |
*/ |
329 |
public void testTake() throws InterruptedException { |
330 |
DelayQueue q = populatedQueue(SIZE); |
331 |
for (int i = 0; i < SIZE; ++i) { |
332 |
assertEquals(new PDelay(i), q.take()); |
333 |
} |
334 |
} |
335 |
|
336 |
/** |
337 |
* Take removes existing elements until empty, then blocks interruptibly |
338 |
*/ |
339 |
public void testBlockingTake() throws InterruptedException { |
340 |
final DelayQueue q = populatedQueue(SIZE); |
341 |
final CountDownLatch pleaseInterrupt = new CountDownLatch(1); |
342 |
Thread t = newStartedThread(new CheckedRunnable() { |
343 |
public void realRun() throws InterruptedException { |
344 |
for (int i = 0; i < SIZE; ++i) { |
345 |
assertEquals(new PDelay(i), ((PDelay)q.take())); |
346 |
} |
347 |
|
348 |
Thread.currentThread().interrupt(); |
349 |
try { |
350 |
q.take(); |
351 |
shouldThrow(); |
352 |
} catch (InterruptedException success) {} |
353 |
assertFalse(Thread.interrupted()); |
354 |
|
355 |
pleaseInterrupt.countDown(); |
356 |
try { |
357 |
q.take(); |
358 |
shouldThrow(); |
359 |
} catch (InterruptedException success) {} |
360 |
assertFalse(Thread.interrupted()); |
361 |
}}); |
362 |
|
363 |
await(pleaseInterrupt); |
364 |
assertThreadStaysAlive(t); |
365 |
t.interrupt(); |
366 |
awaitTermination(t); |
367 |
} |
368 |
|
369 |
/** |
370 |
* poll succeeds unless empty |
371 |
*/ |
372 |
public void testPoll() { |
373 |
DelayQueue q = populatedQueue(SIZE); |
374 |
for (int i = 0; i < SIZE; ++i) { |
375 |
assertEquals(new PDelay(i), q.poll()); |
376 |
} |
377 |
assertNull(q.poll()); |
378 |
} |
379 |
|
380 |
/** |
381 |
* timed poll with zero timeout succeeds when non-empty, else times out |
382 |
*/ |
383 |
public void testTimedPoll0() throws InterruptedException { |
384 |
DelayQueue q = populatedQueue(SIZE); |
385 |
for (int i = 0; i < SIZE; ++i) { |
386 |
assertEquals(new PDelay(i), q.poll(0, MILLISECONDS)); |
387 |
} |
388 |
assertNull(q.poll(0, MILLISECONDS)); |
389 |
} |
390 |
|
391 |
/** |
392 |
* timed poll with nonzero timeout succeeds when non-empty, else times out |
393 |
*/ |
394 |
public void testTimedPoll() throws InterruptedException { |
395 |
DelayQueue q = populatedQueue(SIZE); |
396 |
for (int i = 0; i < SIZE; ++i) { |
397 |
long startTime = System.nanoTime(); |
398 |
assertEquals(new PDelay(i), q.poll(LONG_DELAY_MS, MILLISECONDS)); |
399 |
assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS); |
400 |
} |
401 |
long startTime = System.nanoTime(); |
402 |
assertNull(q.poll(timeoutMillis(), MILLISECONDS)); |
403 |
assertTrue(millisElapsedSince(startTime) >= timeoutMillis()); |
404 |
checkEmpty(q); |
405 |
} |
406 |
|
407 |
/** |
408 |
* Interrupted timed poll throws InterruptedException instead of |
409 |
* returning timeout status |
410 |
*/ |
411 |
public void testInterruptedTimedPoll() throws InterruptedException { |
412 |
final CountDownLatch pleaseInterrupt = new CountDownLatch(1); |
413 |
final DelayQueue q = populatedQueue(SIZE); |
414 |
Thread t = newStartedThread(new CheckedRunnable() { |
415 |
public void realRun() throws InterruptedException { |
416 |
long startTime = System.nanoTime(); |
417 |
for (int i = 0; i < SIZE; ++i) { |
418 |
assertEquals(new PDelay(i), |
419 |
((PDelay)q.poll(LONG_DELAY_MS, MILLISECONDS))); |
420 |
} |
421 |
|
422 |
Thread.currentThread().interrupt(); |
423 |
try { |
424 |
q.poll(LONG_DELAY_MS, MILLISECONDS); |
425 |
shouldThrow(); |
426 |
} catch (InterruptedException success) {} |
427 |
assertFalse(Thread.interrupted()); |
428 |
|
429 |
pleaseInterrupt.countDown(); |
430 |
try { |
431 |
q.poll(LONG_DELAY_MS, MILLISECONDS); |
432 |
shouldThrow(); |
433 |
} catch (InterruptedException success) {} |
434 |
assertFalse(Thread.interrupted()); |
435 |
assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS); |
436 |
}}); |
437 |
|
438 |
await(pleaseInterrupt); |
439 |
assertThreadStaysAlive(t); |
440 |
t.interrupt(); |
441 |
awaitTermination(t); |
442 |
checkEmpty(q); |
443 |
} |
444 |
|
445 |
/** |
446 |
* peek returns next element, or null if empty |
447 |
*/ |
448 |
public void testPeek() { |
449 |
DelayQueue q = populatedQueue(SIZE); |
450 |
for (int i = 0; i < SIZE; ++i) { |
451 |
assertEquals(new PDelay(i), q.peek()); |
452 |
assertEquals(new PDelay(i), q.poll()); |
453 |
if (q.isEmpty()) |
454 |
assertNull(q.peek()); |
455 |
else |
456 |
assertFalse(new PDelay(i).equals(q.peek())); |
457 |
} |
458 |
assertNull(q.peek()); |
459 |
} |
460 |
|
461 |
/** |
462 |
* element returns next element, or throws NSEE if empty |
463 |
*/ |
464 |
public void testElement() { |
465 |
DelayQueue q = populatedQueue(SIZE); |
466 |
for (int i = 0; i < SIZE; ++i) { |
467 |
assertEquals(new PDelay(i), q.element()); |
468 |
q.poll(); |
469 |
} |
470 |
try { |
471 |
q.element(); |
472 |
shouldThrow(); |
473 |
} catch (NoSuchElementException success) {} |
474 |
} |
475 |
|
476 |
/** |
477 |
* remove removes next element, or throws NSEE if empty |
478 |
*/ |
479 |
public void testRemove() { |
480 |
DelayQueue q = populatedQueue(SIZE); |
481 |
for (int i = 0; i < SIZE; ++i) { |
482 |
assertEquals(new PDelay(i), q.remove()); |
483 |
} |
484 |
try { |
485 |
q.remove(); |
486 |
shouldThrow(); |
487 |
} catch (NoSuchElementException success) {} |
488 |
} |
489 |
|
490 |
/** |
491 |
* contains(x) reports true when elements added but not yet removed |
492 |
*/ |
493 |
public void testContains() { |
494 |
DelayQueue q = populatedQueue(SIZE); |
495 |
for (int i = 0; i < SIZE; ++i) { |
496 |
assertTrue(q.contains(new PDelay(i))); |
497 |
q.poll(); |
498 |
assertFalse(q.contains(new PDelay(i))); |
499 |
} |
500 |
} |
501 |
|
502 |
/** |
503 |
* clear removes all elements |
504 |
*/ |
505 |
public void testClear() { |
506 |
DelayQueue q = populatedQueue(SIZE); |
507 |
q.clear(); |
508 |
assertTrue(q.isEmpty()); |
509 |
assertEquals(0, q.size()); |
510 |
assertEquals(Integer.MAX_VALUE, q.remainingCapacity()); |
511 |
PDelay x = new PDelay(1); |
512 |
q.add(x); |
513 |
assertFalse(q.isEmpty()); |
514 |
assertTrue(q.contains(x)); |
515 |
q.clear(); |
516 |
assertTrue(q.isEmpty()); |
517 |
} |
518 |
|
519 |
/** |
520 |
* containsAll(c) is true when c contains a subset of elements |
521 |
*/ |
522 |
public void testContainsAll() { |
523 |
DelayQueue q = populatedQueue(SIZE); |
524 |
DelayQueue p = new DelayQueue(); |
525 |
for (int i = 0; i < SIZE; ++i) { |
526 |
assertTrue(q.containsAll(p)); |
527 |
assertFalse(p.containsAll(q)); |
528 |
p.add(new PDelay(i)); |
529 |
} |
530 |
assertTrue(p.containsAll(q)); |
531 |
} |
532 |
|
533 |
/** |
534 |
* retainAll(c) retains only those elements of c and reports true if changed |
535 |
*/ |
536 |
public void testRetainAll() { |
537 |
DelayQueue q = populatedQueue(SIZE); |
538 |
DelayQueue p = populatedQueue(SIZE); |
539 |
for (int i = 0; i < SIZE; ++i) { |
540 |
boolean changed = q.retainAll(p); |
541 |
if (i == 0) |
542 |
assertFalse(changed); |
543 |
else |
544 |
assertTrue(changed); |
545 |
|
546 |
assertTrue(q.containsAll(p)); |
547 |
assertEquals(SIZE - i, q.size()); |
548 |
p.remove(); |
549 |
} |
550 |
} |
551 |
|
552 |
/** |
553 |
* removeAll(c) removes only those elements of c and reports true if changed |
554 |
*/ |
555 |
public void testRemoveAll() { |
556 |
for (int i = 1; i < SIZE; ++i) { |
557 |
DelayQueue q = populatedQueue(SIZE); |
558 |
DelayQueue p = populatedQueue(i); |
559 |
assertTrue(q.removeAll(p)); |
560 |
assertEquals(SIZE - i, q.size()); |
561 |
for (int j = 0; j < i; ++j) { |
562 |
PDelay x = (PDelay)(p.remove()); |
563 |
assertFalse(q.contains(x)); |
564 |
} |
565 |
} |
566 |
} |
567 |
|
568 |
/** |
569 |
* toArray contains all elements |
570 |
*/ |
571 |
public void testToArray() throws InterruptedException { |
572 |
DelayQueue q = populatedQueue(SIZE); |
573 |
Object[] o = q.toArray(); |
574 |
Arrays.sort(o); |
575 |
for (int i = 0; i < o.length; i++) |
576 |
assertSame(o[i], q.take()); |
577 |
} |
578 |
|
579 |
/** |
580 |
* toArray(a) contains all elements |
581 |
*/ |
582 |
public void testToArray2() { |
583 |
DelayQueue<PDelay> q = populatedQueue(SIZE); |
584 |
PDelay[] ints = new PDelay[SIZE]; |
585 |
PDelay[] array = q.toArray(ints); |
586 |
assertSame(ints, array); |
587 |
Arrays.sort(ints); |
588 |
for (int i = 0; i < ints.length; i++) |
589 |
assertSame(ints[i], q.remove()); |
590 |
} |
591 |
|
592 |
/** |
593 |
* toArray(incompatible array type) throws ArrayStoreException |
594 |
*/ |
595 |
public void testToArray1_BadArg() { |
596 |
DelayQueue q = populatedQueue(SIZE); |
597 |
try { |
598 |
q.toArray(new String[10]); |
599 |
shouldThrow(); |
600 |
} catch (ArrayStoreException success) {} |
601 |
} |
602 |
|
603 |
/** |
604 |
* iterator iterates through all elements |
605 |
*/ |
606 |
public void testIterator() { |
607 |
DelayQueue q = populatedQueue(SIZE); |
608 |
int i = 0; |
609 |
Iterator it = q.iterator(); |
610 |
while (it.hasNext()) { |
611 |
assertTrue(q.contains(it.next())); |
612 |
++i; |
613 |
} |
614 |
assertEquals(i, SIZE); |
615 |
assertIteratorExhausted(it); |
616 |
} |
617 |
|
618 |
/** |
619 |
* iterator of empty collection has no elements |
620 |
*/ |
621 |
public void testEmptyIterator() { |
622 |
assertIteratorExhausted(new DelayQueue().iterator()); |
623 |
} |
624 |
|
625 |
/** |
626 |
* iterator.remove removes current element |
627 |
*/ |
628 |
public void testIteratorRemove() { |
629 |
final DelayQueue q = new DelayQueue(); |
630 |
q.add(new PDelay(2)); |
631 |
q.add(new PDelay(1)); |
632 |
q.add(new PDelay(3)); |
633 |
Iterator it = q.iterator(); |
634 |
it.next(); |
635 |
it.remove(); |
636 |
it = q.iterator(); |
637 |
assertEquals(new PDelay(2), it.next()); |
638 |
assertEquals(new PDelay(3), it.next()); |
639 |
assertFalse(it.hasNext()); |
640 |
} |
641 |
|
642 |
/** |
643 |
* toString contains toStrings of elements |
644 |
*/ |
645 |
public void testToString() { |
646 |
DelayQueue q = populatedQueue(SIZE); |
647 |
String s = q.toString(); |
648 |
for (Object e : q) |
649 |
assertTrue(s.contains(e.toString())); |
650 |
} |
651 |
|
652 |
/** |
653 |
* timed poll transfers elements across Executor tasks |
654 |
*/ |
655 |
public void testPollInExecutor() { |
656 |
final DelayQueue q = new DelayQueue(); |
657 |
final CheckedBarrier threadsStarted = new CheckedBarrier(2); |
658 |
final ExecutorService executor = Executors.newFixedThreadPool(2); |
659 |
try (PoolCleaner cleaner = cleaner(executor)) { |
660 |
executor.execute(new CheckedRunnable() { |
661 |
public void realRun() throws InterruptedException { |
662 |
assertNull(q.poll()); |
663 |
threadsStarted.await(); |
664 |
assertNotNull(q.poll(LONG_DELAY_MS, MILLISECONDS)); |
665 |
checkEmpty(q); |
666 |
}}); |
667 |
|
668 |
executor.execute(new CheckedRunnable() { |
669 |
public void realRun() throws InterruptedException { |
670 |
threadsStarted.await(); |
671 |
q.put(new PDelay(1)); |
672 |
}}); |
673 |
} |
674 |
} |
675 |
|
676 |
/** |
677 |
* Delayed actions do not occur until their delay elapses |
678 |
*/ |
679 |
public void testDelay() throws InterruptedException { |
680 |
DelayQueue<NanoDelay> q = new DelayQueue<NanoDelay>(); |
681 |
for (int i = 0; i < SIZE; ++i) |
682 |
q.add(new NanoDelay(1000000L * (SIZE - i))); |
683 |
|
684 |
long last = 0; |
685 |
for (int i = 0; i < SIZE; ++i) { |
686 |
NanoDelay e = q.take(); |
687 |
long tt = e.getTriggerTime(); |
688 |
assertTrue(System.nanoTime() - tt >= 0); |
689 |
if (i != 0) |
690 |
assertTrue(tt >= last); |
691 |
last = tt; |
692 |
} |
693 |
assertTrue(q.isEmpty()); |
694 |
} |
695 |
|
696 |
/** |
697 |
* peek of a non-empty queue returns non-null even if not expired |
698 |
*/ |
699 |
public void testPeekDelayed() { |
700 |
DelayQueue q = new DelayQueue(); |
701 |
q.add(new NanoDelay(Long.MAX_VALUE)); |
702 |
assertNotNull(q.peek()); |
703 |
} |
704 |
|
705 |
/** |
706 |
* poll of a non-empty queue returns null if no expired elements. |
707 |
*/ |
708 |
public void testPollDelayed() { |
709 |
DelayQueue q = new DelayQueue(); |
710 |
q.add(new NanoDelay(Long.MAX_VALUE)); |
711 |
assertNull(q.poll()); |
712 |
} |
713 |
|
714 |
/** |
715 |
* timed poll of a non-empty queue returns null if no expired elements. |
716 |
*/ |
717 |
public void testTimedPollDelayed() throws InterruptedException { |
718 |
DelayQueue q = new DelayQueue(); |
719 |
q.add(new NanoDelay(LONG_DELAY_MS * 1000000L)); |
720 |
assertNull(q.poll(timeoutMillis(), MILLISECONDS)); |
721 |
} |
722 |
|
723 |
/** |
724 |
* drainTo(c) empties queue into another collection c |
725 |
*/ |
726 |
public void testDrainTo() { |
727 |
DelayQueue q = new DelayQueue(); |
728 |
PDelay[] elems = new PDelay[SIZE]; |
729 |
for (int i = 0; i < SIZE; ++i) { |
730 |
elems[i] = new PDelay(i); |
731 |
q.add(elems[i]); |
732 |
} |
733 |
ArrayList l = new ArrayList(); |
734 |
q.drainTo(l); |
735 |
assertEquals(0, q.size()); |
736 |
for (int i = 0; i < SIZE; ++i) |
737 |
assertEquals(elems[i], l.get(i)); |
738 |
q.add(elems[0]); |
739 |
q.add(elems[1]); |
740 |
assertFalse(q.isEmpty()); |
741 |
assertTrue(q.contains(elems[0])); |
742 |
assertTrue(q.contains(elems[1])); |
743 |
l.clear(); |
744 |
q.drainTo(l); |
745 |
assertEquals(0, q.size()); |
746 |
assertEquals(2, l.size()); |
747 |
for (int i = 0; i < 2; ++i) |
748 |
assertEquals(elems[i], l.get(i)); |
749 |
} |
750 |
|
751 |
/** |
752 |
* drainTo empties queue |
753 |
*/ |
754 |
public void testDrainToWithActivePut() throws InterruptedException { |
755 |
final DelayQueue q = populatedQueue(SIZE); |
756 |
Thread t = new Thread(new CheckedRunnable() { |
757 |
public void realRun() { |
758 |
q.put(new PDelay(SIZE + 1)); |
759 |
}}); |
760 |
|
761 |
t.start(); |
762 |
ArrayList l = new ArrayList(); |
763 |
q.drainTo(l); |
764 |
assertTrue(l.size() >= SIZE); |
765 |
t.join(); |
766 |
assertTrue(q.size() + l.size() >= SIZE); |
767 |
} |
768 |
|
769 |
/** |
770 |
* drainTo(c, n) empties first min(n, size) elements of queue into c |
771 |
*/ |
772 |
public void testDrainToN() { |
773 |
for (int i = 0; i < SIZE + 2; ++i) { |
774 |
DelayQueue q = populatedQueue(SIZE); |
775 |
ArrayList l = new ArrayList(); |
776 |
q.drainTo(l, i); |
777 |
int k = (i < SIZE) ? i : SIZE; |
778 |
assertEquals(SIZE - k, q.size()); |
779 |
assertEquals(k, l.size()); |
780 |
} |
781 |
} |
782 |
|
783 |
/** |
784 |
* remove(null), contains(null) always return false |
785 |
*/ |
786 |
public void testNeverContainsNull() { |
787 |
Collection<?> q = populatedQueue(SIZE); |
788 |
assertFalse(q.contains(null)); |
789 |
assertFalse(q.remove(null)); |
790 |
} |
791 |
} |