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/* |
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* Written by members of JCP JSR-166 Expert Group and released to the |
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* public domain. Use, modify, and redistribute this code in any way |
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* without acknowledgement. Other contributors include Andrew Wright, |
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* Jeffrey Hayes, Pat Fischer, Mike Judd. |
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*/ |
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|
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import junit.framework.*; |
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import java.util.*; |
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import java.util.concurrent.*; |
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|
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public class DelayQueueTest extends TestCase { |
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|
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private static final int N = 10; |
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private static final long SHORT_DELAY_MS = 100; |
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private static final long MEDIUM_DELAY_MS = 1000; |
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private static final long LONG_DELAY_MS = 10000; |
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private static final int NOCAP = Integer.MAX_VALUE; |
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|
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public static void main(String[] args) { |
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junit.textui.TestRunner.run (suite()); |
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} |
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|
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public static Test suite() { |
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return new TestSuite(DelayQueueTest.class); |
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} |
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|
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// Most Q/BQ 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 = Integer.MIN_VALUE + i; } |
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public int compareTo(Object y) { |
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int i = pseudodelay; |
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int j = ((PDelay)y).pseudodelay; |
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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(PDelay y) { |
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int i = pseudodelay; |
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int j = ((PDelay)y).pseudodelay; |
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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 boolean equals(Object other) { |
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return ((PDelay)other).pseudodelay == pseudodelay; |
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} |
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public boolean equals(PDelay other) { |
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return ((PDelay)other).pseudodelay == pseudodelay; |
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} |
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|
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|
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public long getDelay(TimeUnit ignore) { |
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return pseudodelay; |
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} |
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public int intValue() { |
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return pseudodelay; |
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} |
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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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|
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|
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/** |
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* Create a queue of given size containing consecutive |
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* PDelays 0 ... n. |
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*/ |
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private DelayQueue fullQueue(int n) { |
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DelayQueue q = new DelayQueue(); |
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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(NOCAP, 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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public void testConstructor1(){ |
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assertEquals(NOCAP, new DelayQueue().remainingCapacity()); |
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} |
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|
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public void testConstructor3(){ |
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|
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try { |
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DelayQueue q = new DelayQueue(null); |
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fail("Cannot make from null collection"); |
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} |
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catch (NullPointerException success) {} |
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} |
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|
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public void testConstructor4(){ |
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try { |
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PDelay[] ints = new PDelay[N]; |
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DelayQueue q = new DelayQueue(Arrays.asList(ints)); |
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fail("Cannot make with null elements"); |
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} |
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catch (NullPointerException success) {} |
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} |
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|
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public void testConstructor5(){ |
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try { |
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PDelay[] ints = new PDelay[N]; |
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for (int i = 0; i < N-1; ++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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fail("Cannot make with null elements"); |
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} |
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catch (NullPointerException success) {} |
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} |
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|
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public void testConstructor6(){ |
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try { |
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PDelay[] ints = new PDelay[N]; |
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for (int i = 0; i < N; ++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 < N; ++i) |
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assertEquals(ints[i], q.poll()); |
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} |
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finally {} |
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} |
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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(NOCAP, 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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public void testRemainingCapacity(){ |
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DelayQueue q = fullQueue(N); |
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for (int i = 0; i < N; ++i) { |
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assertEquals(NOCAP, q.remainingCapacity()); |
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assertEquals(N-i, q.size()); |
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q.remove(); |
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} |
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for (int i = 0; i < N; ++i) { |
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assertEquals(NOCAP, q.remainingCapacity()); |
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assertEquals(i, q.size()); |
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q.add(new PDelay(i)); |
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} |
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} |
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|
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public void testOfferNull(){ |
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try { |
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DelayQueue q = new DelayQueue(); |
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q.offer(null); |
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fail("should throw NPE"); |
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} catch (NullPointerException success) { } |
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} |
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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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public void testAdd(){ |
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DelayQueue q = new DelayQueue(); |
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for (int i = 0; i < N; ++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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public void testAddAll1(){ |
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try { |
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DelayQueue q = new DelayQueue(); |
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q.addAll(null); |
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fail("Cannot add null collection"); |
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} |
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catch (NullPointerException success) {} |
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} |
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public void testAddAll2(){ |
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try { |
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DelayQueue q = new DelayQueue(); |
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PDelay[] ints = new PDelay[N]; |
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q.addAll(Arrays.asList(ints)); |
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fail("Cannot add null elements"); |
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} |
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catch (NullPointerException success) {} |
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} |
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public void testAddAll3(){ |
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try { |
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DelayQueue q = new DelayQueue(); |
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PDelay[] ints = new PDelay[N]; |
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for (int i = 0; i < N-1; ++i) |
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ints[i] = new PDelay(i); |
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q.addAll(Arrays.asList(ints)); |
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fail("Cannot add null elements"); |
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} |
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catch (NullPointerException success) {} |
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} |
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|
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public void testAddAll5(){ |
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try { |
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PDelay[] empty = new PDelay[0]; |
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PDelay[] ints = new PDelay[N]; |
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for (int i = N-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 < N; ++i) |
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assertEquals(ints[i], q.poll()); |
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} |
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finally {} |
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} |
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|
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public void testPutNull() { |
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try { |
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DelayQueue q = new DelayQueue(); |
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q.put(null); |
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fail("put should throw NPE"); |
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} |
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catch (NullPointerException success){ |
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} |
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} |
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|
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public void testPut() { |
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try { |
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DelayQueue q = new DelayQueue(); |
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for (int i = 0; i < N; ++i) { |
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PDelay I = new PDelay(i); |
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q.put(I); |
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assertTrue(q.contains(I)); |
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} |
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assertEquals(N, q.size()); |
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} |
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finally { |
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} |
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} |
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|
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public void testPutWithTake() { |
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final DelayQueue q = new DelayQueue(); |
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Thread t = new Thread(new Runnable() { |
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public void run(){ |
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int added = 0; |
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try { |
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q.put(new PDelay(0)); |
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++added; |
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q.put(new PDelay(0)); |
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++added; |
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q.put(new PDelay(0)); |
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++added; |
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q.put(new PDelay(0)); |
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++added; |
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assertTrue(added == 4); |
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} finally { |
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} |
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} |
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}); |
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try { |
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t.start(); |
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Thread.sleep(SHORT_DELAY_MS); |
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q.take(); |
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t.interrupt(); |
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t.join(); |
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} catch (Exception e){ |
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fail("Unexpected exception"); |
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} |
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} |
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|
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public void testTimedOffer() { |
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final DelayQueue q = new DelayQueue(); |
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Thread t = new Thread(new Runnable() { |
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public void run(){ |
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try { |
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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/2, TimeUnit.MILLISECONDS)); |
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assertTrue(q.offer(new PDelay(0), LONG_DELAY_MS, TimeUnit.MILLISECONDS)); |
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} finally { } |
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} |
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}); |
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|
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try { |
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t.start(); |
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Thread.sleep(SHORT_DELAY_MS); |
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t.interrupt(); |
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t.join(); |
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} catch (Exception e){ |
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fail("Unexpected exception"); |
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} |
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} |
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|
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public void testTake(){ |
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try { |
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DelayQueue q = fullQueue(N); |
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for (int i = 0; i < N; ++i) { |
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assertEquals(new PDelay(i), ((PDelay)q.take())); |
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} |
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} catch (InterruptedException e){ |
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fail("Unexpected exception"); |
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} |
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} |
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|
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public void testTakeFromEmpty() { |
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final DelayQueue q = new DelayQueue(); |
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Thread t = new Thread(new Runnable() { |
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public void run(){ |
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try { |
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q.take(); |
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fail("Should block"); |
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} catch (InterruptedException success){ } |
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} |
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}); |
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try { |
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t.start(); |
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Thread.sleep(SHORT_DELAY_MS); |
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t.interrupt(); |
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t.join(); |
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} catch (Exception e){ |
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fail("Unexpected exception"); |
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} |
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} |
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|
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public void testBlockingTake(){ |
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Thread t = new Thread(new Runnable() { |
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public void run() { |
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try { |
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DelayQueue q = fullQueue(N); |
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for (int i = 0; i < N; ++i) { |
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assertEquals(new PDelay(i), ((PDelay)q.take())); |
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} |
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q.take(); |
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fail("take should block"); |
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} catch (InterruptedException success){ |
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} |
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}}); |
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t.start(); |
349 |
try { |
350 |
Thread.sleep(SHORT_DELAY_MS); |
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t.interrupt(); |
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t.join(); |
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} |
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catch (InterruptedException ie) { |
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fail("Unexpected exception"); |
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} |
357 |
} |
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|
359 |
|
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public void testPoll(){ |
361 |
DelayQueue q = fullQueue(N); |
362 |
for (int i = 0; i < N; ++i) { |
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assertEquals(new PDelay(i), ((PDelay)q.poll())); |
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} |
365 |
assertNull(q.poll()); |
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} |
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|
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public void testTimedPoll0() { |
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try { |
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DelayQueue q = fullQueue(N); |
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for (int i = 0; i < N; ++i) { |
372 |
assertEquals(new PDelay(i), ((PDelay)q.poll(0, TimeUnit.MILLISECONDS))); |
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} |
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assertNull(q.poll(0, TimeUnit.MILLISECONDS)); |
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} catch (InterruptedException e){ |
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fail("Unexpected exception"); |
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} |
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} |
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|
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public void testTimedPoll() { |
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try { |
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DelayQueue q = fullQueue(N); |
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for (int i = 0; i < N; ++i) { |
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assertEquals(new PDelay(i), ((PDelay)q.poll(SHORT_DELAY_MS, TimeUnit.MILLISECONDS))); |
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} |
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assertNull(q.poll(SHORT_DELAY_MS, TimeUnit.MILLISECONDS)); |
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} catch (InterruptedException e){ |
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fail("Unexpected exception"); |
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} |
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} |
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|
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public void testInterruptedTimedPoll(){ |
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Thread t = new Thread(new Runnable() { |
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public void run() { |
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try { |
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DelayQueue q = fullQueue(N); |
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for (int i = 0; i < N; ++i) { |
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assertEquals(new PDelay(i), ((PDelay)q.poll(SHORT_DELAY_MS, TimeUnit.MILLISECONDS))); |
399 |
} |
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assertNull(q.poll(SHORT_DELAY_MS, TimeUnit.MILLISECONDS)); |
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} catch (InterruptedException success){ |
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} |
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}}); |
404 |
t.start(); |
405 |
try { |
406 |
Thread.sleep(SHORT_DELAY_MS); |
407 |
t.interrupt(); |
408 |
t.join(); |
409 |
} |
410 |
catch (InterruptedException ie) { |
411 |
fail("Unexpected exception"); |
412 |
} |
413 |
} |
414 |
|
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public void testTimedPollWithOffer(){ |
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final DelayQueue q = new DelayQueue(); |
417 |
Thread t = new Thread(new Runnable() { |
418 |
public void run(){ |
419 |
try { |
420 |
assertNull(q.poll(SHORT_DELAY_MS, TimeUnit.MILLISECONDS)); |
421 |
q.poll(LONG_DELAY_MS, TimeUnit.MILLISECONDS); |
422 |
q.poll(LONG_DELAY_MS, TimeUnit.MILLISECONDS); |
423 |
fail("Should block"); |
424 |
} catch (InterruptedException success) { } |
425 |
} |
426 |
}); |
427 |
try { |
428 |
t.start(); |
429 |
Thread.sleep(SHORT_DELAY_MS * 2); |
430 |
assertTrue(q.offer(new PDelay(0), SHORT_DELAY_MS, TimeUnit.MILLISECONDS)); |
431 |
t.interrupt(); |
432 |
t.join(); |
433 |
} catch (Exception e){ |
434 |
fail("Unexpected exception"); |
435 |
} |
436 |
} |
437 |
|
438 |
|
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public void testPeek(){ |
440 |
DelayQueue q = fullQueue(N); |
441 |
for (int i = 0; i < N; ++i) { |
442 |
assertEquals(new PDelay(i), ((PDelay)q.peek())); |
443 |
q.poll(); |
444 |
assertTrue(q.peek() == null || |
445 |
i != ((PDelay)q.peek()).intValue()); |
446 |
} |
447 |
assertNull(q.peek()); |
448 |
} |
449 |
|
450 |
public void testElement(){ |
451 |
DelayQueue q = fullQueue(N); |
452 |
for (int i = 0; i < N; ++i) { |
453 |
assertEquals(new PDelay(i), ((PDelay)q.element())); |
454 |
q.poll(); |
455 |
} |
456 |
try { |
457 |
q.element(); |
458 |
fail("no such element"); |
459 |
} |
460 |
catch (NoSuchElementException success) {} |
461 |
} |
462 |
|
463 |
public void testRemove(){ |
464 |
DelayQueue q = fullQueue(N); |
465 |
for (int i = 0; i < N; ++i) { |
466 |
assertEquals(new PDelay(i), ((PDelay)q.remove())); |
467 |
} |
468 |
try { |
469 |
q.remove(); |
470 |
fail("remove should throw"); |
471 |
} catch (NoSuchElementException success){ |
472 |
} |
473 |
} |
474 |
|
475 |
public void testRemoveElement(){ |
476 |
DelayQueue q = fullQueue(N); |
477 |
for (int i = 1; i < N; i+=2) { |
478 |
assertTrue(q.remove(new PDelay(i))); |
479 |
} |
480 |
for (int i = 0; i < N; i+=2) { |
481 |
assertTrue(q.remove(new PDelay(i))); |
482 |
assertFalse(q.remove(new PDelay(i+1))); |
483 |
} |
484 |
assertTrue(q.isEmpty()); |
485 |
} |
486 |
|
487 |
public void testContains(){ |
488 |
DelayQueue q = fullQueue(N); |
489 |
for (int i = 0; i < N; ++i) { |
490 |
assertTrue(q.contains(new PDelay(i))); |
491 |
q.poll(); |
492 |
assertFalse(q.contains(new PDelay(i))); |
493 |
} |
494 |
} |
495 |
|
496 |
public void testClear(){ |
497 |
DelayQueue q = fullQueue(N); |
498 |
q.clear(); |
499 |
assertTrue(q.isEmpty()); |
500 |
assertEquals(0, q.size()); |
501 |
assertEquals(NOCAP, q.remainingCapacity()); |
502 |
q.add(new PDelay(1)); |
503 |
assertFalse(q.isEmpty()); |
504 |
q.clear(); |
505 |
assertTrue(q.isEmpty()); |
506 |
} |
507 |
|
508 |
public void testContainsAll(){ |
509 |
DelayQueue q = fullQueue(N); |
510 |
DelayQueue p = new DelayQueue(); |
511 |
for (int i = 0; i < N; ++i) { |
512 |
assertTrue(q.containsAll(p)); |
513 |
assertFalse(p.containsAll(q)); |
514 |
p.add(new PDelay(i)); |
515 |
} |
516 |
assertTrue(p.containsAll(q)); |
517 |
} |
518 |
|
519 |
public void testRetainAll(){ |
520 |
DelayQueue q = fullQueue(N); |
521 |
DelayQueue p = fullQueue(N); |
522 |
for (int i = 0; i < N; ++i) { |
523 |
boolean changed = q.retainAll(p); |
524 |
if (i == 0) |
525 |
assertFalse(changed); |
526 |
else |
527 |
assertTrue(changed); |
528 |
|
529 |
assertTrue(q.containsAll(p)); |
530 |
assertEquals(N-i, q.size()); |
531 |
p.remove(); |
532 |
} |
533 |
} |
534 |
|
535 |
public void testRemoveAll(){ |
536 |
for (int i = 1; i < N; ++i) { |
537 |
DelayQueue q = fullQueue(N); |
538 |
DelayQueue p = fullQueue(i); |
539 |
assertTrue(q.removeAll(p)); |
540 |
assertEquals(N-i, q.size()); |
541 |
for (int j = 0; j < i; ++j) { |
542 |
PDelay I = (PDelay)(p.remove()); |
543 |
assertFalse(q.contains(I)); |
544 |
} |
545 |
} |
546 |
} |
547 |
|
548 |
/* |
549 |
public void testEqualsAndHashCode(){ |
550 |
DelayQueue q1 = fullQueue(N); |
551 |
DelayQueue q2 = fullQueue(N); |
552 |
assertTrue(q1.equals(q2)); |
553 |
assertTrue(q2.equals(q1)); |
554 |
assertEquals(q1.hashCode(), q2.hashCode()); |
555 |
q1.remove(); |
556 |
assertFalse(q1.equals(q2)); |
557 |
assertFalse(q2.equals(q1)); |
558 |
assertFalse(q1.hashCode() == q2.hashCode()); |
559 |
q2.remove(); |
560 |
assertTrue(q1.equals(q2)); |
561 |
assertTrue(q2.equals(q1)); |
562 |
assertEquals(q1.hashCode(), q2.hashCode()); |
563 |
} |
564 |
*/ |
565 |
|
566 |
public void testToArray(){ |
567 |
DelayQueue q = fullQueue(N); |
568 |
Object[] o = q.toArray(); |
569 |
Arrays.sort(o); |
570 |
try { |
571 |
for(int i = 0; i < o.length; i++) |
572 |
assertEquals(o[i], q.take()); |
573 |
} catch (InterruptedException e){ |
574 |
fail("Unexpected exception"); |
575 |
} |
576 |
} |
577 |
|
578 |
public void testToArray2(){ |
579 |
DelayQueue q = fullQueue(N); |
580 |
PDelay[] ints = new PDelay[N]; |
581 |
ints = (PDelay[])q.toArray(ints); |
582 |
Arrays.sort(ints); |
583 |
try { |
584 |
for(int i = 0; i < ints.length; i++) |
585 |
assertEquals(ints[i], q.take()); |
586 |
} catch (InterruptedException e){ |
587 |
fail("Unexpected exception"); |
588 |
} |
589 |
} |
590 |
|
591 |
public void testIterator(){ |
592 |
DelayQueue q = fullQueue(N); |
593 |
int i = 0; |
594 |
Iterator it = q.iterator(); |
595 |
while(it.hasNext()) { |
596 |
assertTrue(q.contains(it.next())); |
597 |
++i; |
598 |
} |
599 |
assertEquals(i, N); |
600 |
} |
601 |
|
602 |
public void testIteratorRemove () { |
603 |
|
604 |
final DelayQueue q = new DelayQueue(); |
605 |
|
606 |
q.add(new PDelay(2)); |
607 |
q.add(new PDelay(1)); |
608 |
q.add(new PDelay(3)); |
609 |
|
610 |
Iterator it = q.iterator(); |
611 |
it.next(); |
612 |
it.remove(); |
613 |
|
614 |
it = q.iterator(); |
615 |
assertEquals(it.next(), new PDelay(2)); |
616 |
assertEquals(it.next(), new PDelay(3)); |
617 |
assertFalse(it.hasNext()); |
618 |
} |
619 |
|
620 |
|
621 |
public void testToString(){ |
622 |
DelayQueue q = fullQueue(N); |
623 |
String s = q.toString(); |
624 |
for (int i = 0; i < N; ++i) { |
625 |
assertTrue(s.indexOf(String.valueOf(i)) >= 0); |
626 |
} |
627 |
} |
628 |
|
629 |
public void testPollInExecutor() { |
630 |
|
631 |
final DelayQueue q = new DelayQueue(); |
632 |
|
633 |
ExecutorService executor = Executors.newFixedThreadPool(2); |
634 |
|
635 |
executor.execute(new Runnable() { |
636 |
public void run() { |
637 |
assertNull("poll should fail", q.poll()); |
638 |
try { |
639 |
assertTrue(null != q.poll(MEDIUM_DELAY_MS * 2, TimeUnit.MILLISECONDS)); |
640 |
assertTrue(q.isEmpty()); |
641 |
} |
642 |
catch (InterruptedException e) { |
643 |
fail("should not be interrupted"); |
644 |
} |
645 |
} |
646 |
}); |
647 |
|
648 |
executor.execute(new Runnable() { |
649 |
public void run() { |
650 |
try { |
651 |
Thread.sleep(MEDIUM_DELAY_MS); |
652 |
q.put(new PDelay(1)); |
653 |
} |
654 |
catch (InterruptedException e) { |
655 |
fail("should not be interrupted"); |
656 |
} |
657 |
} |
658 |
}); |
659 |
|
660 |
executor.shutdown(); |
661 |
|
662 |
} |
663 |
|
664 |
static class NanoDelay implements Delayed { |
665 |
long trigger; |
666 |
NanoDelay(long i) { |
667 |
trigger = System.nanoTime() + i; |
668 |
} |
669 |
public int compareTo(Object y) { |
670 |
long i = trigger; |
671 |
long j = ((NanoDelay)y).trigger; |
672 |
if (i < j) return -1; |
673 |
if (i > j) return 1; |
674 |
return 0; |
675 |
} |
676 |
|
677 |
public int compareTo(NanoDelay y) { |
678 |
long i = trigger; |
679 |
long j = ((NanoDelay)y).trigger; |
680 |
if (i < j) return -1; |
681 |
if (i > j) return 1; |
682 |
return 0; |
683 |
} |
684 |
|
685 |
public boolean equals(Object other) { |
686 |
return ((NanoDelay)other).trigger == trigger; |
687 |
} |
688 |
public boolean equals(NanoDelay other) { |
689 |
return ((NanoDelay)other).trigger == trigger; |
690 |
} |
691 |
|
692 |
public long getDelay(TimeUnit unit) { |
693 |
long n = trigger - System.nanoTime(); |
694 |
return unit.convert(n, TimeUnit.NANOSECONDS); |
695 |
} |
696 |
|
697 |
public long getTriggerTime() { |
698 |
return trigger; |
699 |
} |
700 |
|
701 |
public String toString() { |
702 |
return String.valueOf(trigger); |
703 |
} |
704 |
} |
705 |
|
706 |
public void testDelay() { |
707 |
DelayQueue q = new DelayQueue(); |
708 |
NanoDelay[] elements = new NanoDelay[N]; |
709 |
for (int i = 0; i < N; ++i) { |
710 |
elements[i] = new NanoDelay(1000000000L + 1000000L * (N - i)); |
711 |
} |
712 |
for (int i = 0; i < N; ++i) { |
713 |
q.add(elements[i]); |
714 |
} |
715 |
|
716 |
try { |
717 |
long last = 0; |
718 |
for (int i = 0; i < N; ++i) { |
719 |
NanoDelay e = (NanoDelay)(q.take()); |
720 |
long tt = e.getTriggerTime(); |
721 |
assertTrue(tt <= System.nanoTime()); |
722 |
if (i != 0) |
723 |
assertTrue(tt >= last); |
724 |
last = tt; |
725 |
} |
726 |
} |
727 |
catch(InterruptedException ie) { |
728 |
fail("Unexpected Exception"); |
729 |
} |
730 |
} |
731 |
|
732 |
} |