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/* |
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* 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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*/ |
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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; |
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import java.util.Arrays; |
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import java.util.Collection; |
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import java.util.Deque; |
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import java.util.Iterator; |
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import java.util.NoSuchElementException; |
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import java.util.Queue; |
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import java.util.concurrent.BlockingDeque; |
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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.Executors; |
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import java.util.concurrent.ExecutorService; |
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import java.util.concurrent.LinkedBlockingDeque; |
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|
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import junit.framework.Test; |
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|
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public class LinkedBlockingDequeTest extends JSR166TestCase { |
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|
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public static class Unbounded extends BlockingQueueTest { |
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protected BlockingQueue emptyCollection() { |
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return new LinkedBlockingDeque(); |
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} |
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} |
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|
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public static class Bounded extends BlockingQueueTest { |
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protected BlockingQueue emptyCollection() { |
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return new LinkedBlockingDeque(SIZE); |
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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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class Implementation implements CollectionImplementation { |
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public Class<?> klazz() { return LinkedBlockingDeque.class; } |
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public Collection emptyCollection() { return new LinkedBlockingDeque(); } |
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public Object makeElement(int i) { return i; } |
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public boolean isConcurrent() { return true; } |
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public boolean permitsNulls() { return false; } |
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} |
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return newTestSuite(LinkedBlockingDequeTest.class, |
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new Unbounded().testSuite(), |
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new Bounded().testSuite(), |
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CollectionTest.testSuite(new Implementation())); |
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} |
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|
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/** |
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* Returns a new deque of given size containing consecutive |
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* Integers 0 ... n - 1. |
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*/ |
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private static LinkedBlockingDeque<Integer> populatedDeque(int n) { |
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LinkedBlockingDeque<Integer> q = |
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new LinkedBlockingDeque<Integer>(n); |
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assertTrue(q.isEmpty()); |
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for (int i = 0; i < n; i++) |
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assertTrue(q.offer(new Integer(i))); |
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assertFalse(q.isEmpty()); |
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assertEquals(0, q.remainingCapacity()); |
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assertEquals(n, q.size()); |
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assertEquals((Integer) 0, q.peekFirst()); |
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assertEquals((Integer) (n - 1), q.peekLast()); |
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return q; |
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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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LinkedBlockingDeque q = new LinkedBlockingDeque(); |
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assertTrue(q.isEmpty()); |
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q.add(new Integer(1)); |
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assertFalse(q.isEmpty()); |
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q.add(new Integer(2)); |
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q.removeFirst(); |
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q.removeFirst(); |
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assertTrue(q.isEmpty()); |
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} |
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|
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/** |
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* size changes when elements added and removed |
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*/ |
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public void testSize() { |
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LinkedBlockingDeque q = populatedDeque(SIZE); |
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for (int i = 0; i < SIZE; ++i) { |
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assertEquals(SIZE - i, q.size()); |
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q.removeFirst(); |
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} |
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for (int i = 0; i < SIZE; ++i) { |
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assertEquals(i, q.size()); |
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q.add(new Integer(i)); |
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} |
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} |
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|
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/** |
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* offerFirst(null) throws NullPointerException |
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*/ |
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public void testOfferFirstNull() { |
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LinkedBlockingDeque q = new LinkedBlockingDeque(); |
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try { |
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q.offerFirst(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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* offerLast(null) throws NullPointerException |
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*/ |
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public void testOfferLastNull() { |
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LinkedBlockingDeque q = new LinkedBlockingDeque(); |
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try { |
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q.offerLast(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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* OfferFirst succeeds |
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*/ |
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public void testOfferFirst() { |
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LinkedBlockingDeque q = new LinkedBlockingDeque(); |
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assertTrue(q.offerFirst(new Integer(0))); |
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assertTrue(q.offerFirst(new Integer(1))); |
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} |
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|
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/** |
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* OfferLast succeeds |
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*/ |
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public void testOfferLast() { |
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LinkedBlockingDeque q = new LinkedBlockingDeque(); |
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assertTrue(q.offerLast(new Integer(0))); |
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assertTrue(q.offerLast(new Integer(1))); |
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} |
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|
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/** |
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* pollFirst succeeds unless empty |
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*/ |
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public void testPollFirst() { |
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LinkedBlockingDeque q = populatedDeque(SIZE); |
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for (int i = 0; i < SIZE; ++i) { |
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assertEquals(i, q.pollFirst()); |
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} |
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assertNull(q.pollFirst()); |
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} |
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|
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/** |
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* pollLast succeeds unless empty |
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*/ |
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public void testPollLast() { |
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LinkedBlockingDeque q = populatedDeque(SIZE); |
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for (int i = SIZE - 1; i >= 0; --i) { |
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assertEquals(i, q.pollLast()); |
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} |
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assertNull(q.pollLast()); |
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} |
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|
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/** |
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* peekFirst returns next element, or null if empty |
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*/ |
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public void testPeekFirst() { |
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LinkedBlockingDeque q = populatedDeque(SIZE); |
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for (int i = 0; i < SIZE; ++i) { |
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assertEquals(i, q.peekFirst()); |
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assertEquals(i, q.pollFirst()); |
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assertTrue(q.peekFirst() == null || |
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!q.peekFirst().equals(i)); |
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} |
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assertNull(q.peekFirst()); |
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} |
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|
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/** |
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* peek returns next element, or null if empty |
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*/ |
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public void testPeek() { |
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LinkedBlockingDeque q = populatedDeque(SIZE); |
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for (int i = 0; i < SIZE; ++i) { |
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assertEquals(i, q.peek()); |
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assertEquals(i, q.pollFirst()); |
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assertTrue(q.peek() == null || |
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!q.peek().equals(i)); |
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} |
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assertNull(q.peek()); |
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} |
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|
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/** |
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* peekLast returns next element, or null if empty |
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*/ |
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public void testPeekLast() { |
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LinkedBlockingDeque q = populatedDeque(SIZE); |
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for (int i = SIZE - 1; i >= 0; --i) { |
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assertEquals(i, q.peekLast()); |
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assertEquals(i, q.pollLast()); |
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assertTrue(q.peekLast() == null || |
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!q.peekLast().equals(i)); |
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} |
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assertNull(q.peekLast()); |
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} |
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|
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/** |
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* getFirst() returns first element, or throws NSEE if empty |
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*/ |
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public void testFirstElement() { |
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LinkedBlockingDeque q = populatedDeque(SIZE); |
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for (int i = 0; i < SIZE; ++i) { |
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assertEquals(i, q.getFirst()); |
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assertEquals(i, q.pollFirst()); |
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} |
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try { |
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q.getFirst(); |
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shouldThrow(); |
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} catch (NoSuchElementException success) {} |
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assertNull(q.peekFirst()); |
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} |
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|
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/** |
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* getLast() returns last element, or throws NSEE if empty |
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*/ |
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public void testLastElement() { |
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LinkedBlockingDeque q = populatedDeque(SIZE); |
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for (int i = SIZE - 1; i >= 0; --i) { |
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assertEquals(i, q.getLast()); |
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assertEquals(i, q.pollLast()); |
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} |
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try { |
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q.getLast(); |
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shouldThrow(); |
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} catch (NoSuchElementException success) {} |
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assertNull(q.peekLast()); |
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} |
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|
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/** |
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* removeFirst() removes first element, or throws NSEE if empty |
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*/ |
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public void testRemoveFirst() { |
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LinkedBlockingDeque q = populatedDeque(SIZE); |
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for (int i = 0; i < SIZE; ++i) { |
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assertEquals(i, q.removeFirst()); |
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} |
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try { |
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q.removeFirst(); |
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shouldThrow(); |
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} catch (NoSuchElementException success) {} |
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assertNull(q.peekFirst()); |
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} |
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|
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/** |
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* removeLast() removes last element, or throws NSEE if empty |
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*/ |
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public void testRemoveLast() { |
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LinkedBlockingDeque q = populatedDeque(SIZE); |
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for (int i = SIZE - 1; i >= 0; --i) { |
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assertEquals(i, q.removeLast()); |
262 |
} |
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try { |
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q.removeLast(); |
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shouldThrow(); |
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} catch (NoSuchElementException success) {} |
267 |
assertNull(q.peekLast()); |
268 |
} |
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|
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/** |
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* remove removes next element, or throws NSEE if empty |
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*/ |
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public void testRemove() { |
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LinkedBlockingDeque q = populatedDeque(SIZE); |
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for (int i = 0; i < SIZE; ++i) { |
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assertEquals(i, q.remove()); |
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} |
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try { |
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q.remove(); |
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shouldThrow(); |
281 |
} catch (NoSuchElementException success) {} |
282 |
} |
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|
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/** |
285 |
* removeFirstOccurrence(x) removes x and returns true if present |
286 |
*/ |
287 |
public void testRemoveFirstOccurrence() { |
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LinkedBlockingDeque q = populatedDeque(SIZE); |
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for (int i = 1; i < SIZE; i += 2) { |
290 |
assertTrue(q.removeFirstOccurrence(new Integer(i))); |
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} |
292 |
for (int i = 0; i < SIZE; i += 2) { |
293 |
assertTrue(q.removeFirstOccurrence(new Integer(i))); |
294 |
assertFalse(q.removeFirstOccurrence(new Integer(i + 1))); |
295 |
} |
296 |
assertTrue(q.isEmpty()); |
297 |
} |
298 |
|
299 |
/** |
300 |
* removeLastOccurrence(x) removes x and returns true if present |
301 |
*/ |
302 |
public void testRemoveLastOccurrence() { |
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LinkedBlockingDeque q = populatedDeque(SIZE); |
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for (int i = 1; i < SIZE; i += 2) { |
305 |
assertTrue(q.removeLastOccurrence(new Integer(i))); |
306 |
} |
307 |
for (int i = 0; i < SIZE; i += 2) { |
308 |
assertTrue(q.removeLastOccurrence(new Integer(i))); |
309 |
assertFalse(q.removeLastOccurrence(new Integer(i + 1))); |
310 |
} |
311 |
assertTrue(q.isEmpty()); |
312 |
} |
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|
314 |
/** |
315 |
* peekFirst returns element inserted with addFirst |
316 |
*/ |
317 |
public void testAddFirst() { |
318 |
LinkedBlockingDeque q = populatedDeque(3); |
319 |
q.pollLast(); |
320 |
q.addFirst(four); |
321 |
assertSame(four, q.peekFirst()); |
322 |
} |
323 |
|
324 |
/** |
325 |
* peekLast returns element inserted with addLast |
326 |
*/ |
327 |
public void testAddLast() { |
328 |
LinkedBlockingDeque q = populatedDeque(3); |
329 |
q.pollLast(); |
330 |
q.addLast(four); |
331 |
assertSame(four, q.peekLast()); |
332 |
} |
333 |
|
334 |
/** |
335 |
* A new deque has the indicated capacity, or Integer.MAX_VALUE if |
336 |
* none given |
337 |
*/ |
338 |
public void testConstructor1() { |
339 |
assertEquals(SIZE, new LinkedBlockingDeque(SIZE).remainingCapacity()); |
340 |
assertEquals(Integer.MAX_VALUE, new LinkedBlockingDeque().remainingCapacity()); |
341 |
} |
342 |
|
343 |
/** |
344 |
* Constructor throws IllegalArgumentException if capacity argument nonpositive |
345 |
*/ |
346 |
public void testConstructor2() { |
347 |
try { |
348 |
new LinkedBlockingDeque(0); |
349 |
shouldThrow(); |
350 |
} catch (IllegalArgumentException success) {} |
351 |
} |
352 |
|
353 |
/** |
354 |
* Initializing from null Collection throws NullPointerException |
355 |
*/ |
356 |
public void testConstructor3() { |
357 |
try { |
358 |
new LinkedBlockingDeque(null); |
359 |
shouldThrow(); |
360 |
} catch (NullPointerException success) {} |
361 |
} |
362 |
|
363 |
/** |
364 |
* Initializing from Collection of null elements throws NullPointerException |
365 |
*/ |
366 |
public void testConstructor4() { |
367 |
Collection<Integer> elements = Arrays.asList(new Integer[SIZE]); |
368 |
try { |
369 |
new LinkedBlockingDeque(elements); |
370 |
shouldThrow(); |
371 |
} catch (NullPointerException success) {} |
372 |
} |
373 |
|
374 |
/** |
375 |
* Initializing from Collection with some null elements throws |
376 |
* NullPointerException |
377 |
*/ |
378 |
public void testConstructor5() { |
379 |
Integer[] ints = new Integer[SIZE]; |
380 |
for (int i = 0; i < SIZE - 1; ++i) |
381 |
ints[i] = i; |
382 |
Collection<Integer> elements = Arrays.asList(ints); |
383 |
try { |
384 |
new LinkedBlockingDeque(elements); |
385 |
shouldThrow(); |
386 |
} catch (NullPointerException success) {} |
387 |
} |
388 |
|
389 |
/** |
390 |
* Deque contains all elements of collection used to initialize |
391 |
*/ |
392 |
public void testConstructor6() { |
393 |
Integer[] ints = new Integer[SIZE]; |
394 |
for (int i = 0; i < SIZE; ++i) |
395 |
ints[i] = i; |
396 |
LinkedBlockingDeque q = new LinkedBlockingDeque(Arrays.asList(ints)); |
397 |
for (int i = 0; i < SIZE; ++i) |
398 |
assertEquals(ints[i], q.poll()); |
399 |
} |
400 |
|
401 |
/** |
402 |
* Deque transitions from empty to full when elements added |
403 |
*/ |
404 |
public void testEmptyFull() { |
405 |
LinkedBlockingDeque q = new LinkedBlockingDeque(2); |
406 |
assertTrue(q.isEmpty()); |
407 |
assertEquals("should have room for 2", 2, q.remainingCapacity()); |
408 |
q.add(one); |
409 |
assertFalse(q.isEmpty()); |
410 |
q.add(two); |
411 |
assertFalse(q.isEmpty()); |
412 |
assertEquals(0, q.remainingCapacity()); |
413 |
assertFalse(q.offer(three)); |
414 |
} |
415 |
|
416 |
/** |
417 |
* remainingCapacity decreases on add, increases on remove |
418 |
*/ |
419 |
public void testRemainingCapacity() { |
420 |
BlockingQueue q = populatedDeque(SIZE); |
421 |
for (int i = 0; i < SIZE; ++i) { |
422 |
assertEquals(i, q.remainingCapacity()); |
423 |
assertEquals(SIZE, q.size() + q.remainingCapacity()); |
424 |
assertEquals(i, q.remove()); |
425 |
} |
426 |
for (int i = 0; i < SIZE; ++i) { |
427 |
assertEquals(SIZE - i, q.remainingCapacity()); |
428 |
assertEquals(SIZE, q.size() + q.remainingCapacity()); |
429 |
assertTrue(q.add(i)); |
430 |
} |
431 |
} |
432 |
|
433 |
/** |
434 |
* push(null) throws NPE |
435 |
*/ |
436 |
public void testPushNull() { |
437 |
LinkedBlockingDeque q = new LinkedBlockingDeque(1); |
438 |
try { |
439 |
q.push(null); |
440 |
shouldThrow(); |
441 |
} catch (NullPointerException success) {} |
442 |
} |
443 |
|
444 |
/** |
445 |
* push succeeds if not full; throws IllegalStateException if full |
446 |
*/ |
447 |
public void testPush() { |
448 |
LinkedBlockingDeque q = new LinkedBlockingDeque(SIZE); |
449 |
for (int i = 0; i < SIZE; ++i) { |
450 |
Integer x = new Integer(i); |
451 |
q.push(x); |
452 |
assertEquals(x, q.peek()); |
453 |
} |
454 |
assertEquals(0, q.remainingCapacity()); |
455 |
try { |
456 |
q.push(new Integer(SIZE)); |
457 |
shouldThrow(); |
458 |
} catch (IllegalStateException success) {} |
459 |
} |
460 |
|
461 |
/** |
462 |
* peekFirst returns element inserted with push |
463 |
*/ |
464 |
public void testPushWithPeek() { |
465 |
LinkedBlockingDeque q = populatedDeque(3); |
466 |
q.pollLast(); |
467 |
q.push(four); |
468 |
assertSame(four, q.peekFirst()); |
469 |
} |
470 |
|
471 |
/** |
472 |
* pop removes next element, or throws NSEE if empty |
473 |
*/ |
474 |
public void testPop() { |
475 |
LinkedBlockingDeque q = populatedDeque(SIZE); |
476 |
for (int i = 0; i < SIZE; ++i) { |
477 |
assertEquals(i, q.pop()); |
478 |
} |
479 |
try { |
480 |
q.pop(); |
481 |
shouldThrow(); |
482 |
} catch (NoSuchElementException success) {} |
483 |
} |
484 |
|
485 |
/** |
486 |
* Offer succeeds if not full; fails if full |
487 |
*/ |
488 |
public void testOffer() { |
489 |
LinkedBlockingDeque q = new LinkedBlockingDeque(1); |
490 |
assertTrue(q.offer(zero)); |
491 |
assertFalse(q.offer(one)); |
492 |
} |
493 |
|
494 |
/** |
495 |
* add succeeds if not full; throws IllegalStateException if full |
496 |
*/ |
497 |
public void testAdd() { |
498 |
LinkedBlockingDeque q = new LinkedBlockingDeque(SIZE); |
499 |
for (int i = 0; i < SIZE; ++i) |
500 |
assertTrue(q.add(new Integer(i))); |
501 |
assertEquals(0, q.remainingCapacity()); |
502 |
try { |
503 |
q.add(new Integer(SIZE)); |
504 |
shouldThrow(); |
505 |
} catch (IllegalStateException success) {} |
506 |
} |
507 |
|
508 |
/** |
509 |
* addAll(this) throws IllegalArgumentException |
510 |
*/ |
511 |
public void testAddAllSelf() { |
512 |
LinkedBlockingDeque q = populatedDeque(SIZE); |
513 |
try { |
514 |
q.addAll(q); |
515 |
shouldThrow(); |
516 |
} catch (IllegalArgumentException success) {} |
517 |
} |
518 |
|
519 |
/** |
520 |
* addAll of a collection with any null elements throws NPE after |
521 |
* possibly adding some elements |
522 |
*/ |
523 |
public void testAddAll3() { |
524 |
LinkedBlockingDeque q = new LinkedBlockingDeque(SIZE); |
525 |
Integer[] ints = new Integer[SIZE]; |
526 |
for (int i = 0; i < SIZE - 1; ++i) |
527 |
ints[i] = new Integer(i); |
528 |
Collection<Integer> elements = Arrays.asList(ints); |
529 |
try { |
530 |
q.addAll(elements); |
531 |
shouldThrow(); |
532 |
} catch (NullPointerException success) {} |
533 |
} |
534 |
|
535 |
/** |
536 |
* addAll throws IllegalStateException if not enough room |
537 |
*/ |
538 |
public void testAddAll4() { |
539 |
LinkedBlockingDeque q = new LinkedBlockingDeque(SIZE - 1); |
540 |
Integer[] ints = new Integer[SIZE]; |
541 |
for (int i = 0; i < SIZE; ++i) |
542 |
ints[i] = new Integer(i); |
543 |
Collection<Integer> elements = Arrays.asList(ints); |
544 |
try { |
545 |
q.addAll(elements); |
546 |
shouldThrow(); |
547 |
} catch (IllegalStateException success) {} |
548 |
} |
549 |
|
550 |
/** |
551 |
* Deque contains all elements, in traversal order, of successful addAll |
552 |
*/ |
553 |
public void testAddAll5() { |
554 |
Integer[] empty = new Integer[0]; |
555 |
Integer[] ints = new Integer[SIZE]; |
556 |
for (int i = 0; i < SIZE; ++i) |
557 |
ints[i] = new Integer(i); |
558 |
LinkedBlockingDeque q = new LinkedBlockingDeque(SIZE); |
559 |
assertFalse(q.addAll(Arrays.asList(empty))); |
560 |
assertTrue(q.addAll(Arrays.asList(ints))); |
561 |
for (int i = 0; i < SIZE; ++i) |
562 |
assertEquals(ints[i], q.poll()); |
563 |
} |
564 |
|
565 |
/** |
566 |
* all elements successfully put are contained |
567 |
*/ |
568 |
public void testPut() throws InterruptedException { |
569 |
LinkedBlockingDeque q = new LinkedBlockingDeque(SIZE); |
570 |
for (int i = 0; i < SIZE; ++i) { |
571 |
Integer x = new Integer(i); |
572 |
q.put(x); |
573 |
assertTrue(q.contains(x)); |
574 |
} |
575 |
assertEquals(0, q.remainingCapacity()); |
576 |
} |
577 |
|
578 |
/** |
579 |
* put blocks interruptibly if full |
580 |
*/ |
581 |
public void testBlockingPut() throws InterruptedException { |
582 |
final LinkedBlockingDeque q = new LinkedBlockingDeque(SIZE); |
583 |
final CountDownLatch pleaseInterrupt = new CountDownLatch(1); |
584 |
Thread t = newStartedThread(new CheckedRunnable() { |
585 |
public void realRun() throws InterruptedException { |
586 |
for (int i = 0; i < SIZE; ++i) |
587 |
q.put(i); |
588 |
assertEquals(SIZE, q.size()); |
589 |
assertEquals(0, q.remainingCapacity()); |
590 |
|
591 |
Thread.currentThread().interrupt(); |
592 |
try { |
593 |
q.put(99); |
594 |
shouldThrow(); |
595 |
} catch (InterruptedException success) {} |
596 |
assertFalse(Thread.interrupted()); |
597 |
|
598 |
pleaseInterrupt.countDown(); |
599 |
try { |
600 |
q.put(99); |
601 |
shouldThrow(); |
602 |
} catch (InterruptedException success) {} |
603 |
assertFalse(Thread.interrupted()); |
604 |
}}); |
605 |
|
606 |
await(pleaseInterrupt); |
607 |
if (randomBoolean()) assertThreadBlocks(t, Thread.State.WAITING); |
608 |
t.interrupt(); |
609 |
awaitTermination(t); |
610 |
assertEquals(SIZE, q.size()); |
611 |
assertEquals(0, q.remainingCapacity()); |
612 |
} |
613 |
|
614 |
/** |
615 |
* put blocks interruptibly waiting for take when full |
616 |
*/ |
617 |
public void testPutWithTake() throws InterruptedException { |
618 |
final int capacity = 2; |
619 |
final LinkedBlockingDeque q = new LinkedBlockingDeque(capacity); |
620 |
final CountDownLatch pleaseTake = new CountDownLatch(1); |
621 |
final CountDownLatch pleaseInterrupt = new CountDownLatch(1); |
622 |
Thread t = newStartedThread(new CheckedRunnable() { |
623 |
public void realRun() throws InterruptedException { |
624 |
for (int i = 0; i < capacity; i++) |
625 |
q.put(i); |
626 |
pleaseTake.countDown(); |
627 |
q.put(86); |
628 |
|
629 |
Thread.currentThread().interrupt(); |
630 |
try { |
631 |
q.put(99); |
632 |
shouldThrow(); |
633 |
} catch (InterruptedException success) {} |
634 |
assertFalse(Thread.interrupted()); |
635 |
|
636 |
pleaseInterrupt.countDown(); |
637 |
try { |
638 |
q.put(99); |
639 |
shouldThrow(); |
640 |
} catch (InterruptedException success) {} |
641 |
assertFalse(Thread.interrupted()); |
642 |
}}); |
643 |
|
644 |
await(pleaseTake); |
645 |
assertEquals(0, q.remainingCapacity()); |
646 |
assertEquals(0, q.take()); |
647 |
|
648 |
await(pleaseInterrupt); |
649 |
if (randomBoolean()) assertThreadBlocks(t, Thread.State.WAITING); |
650 |
t.interrupt(); |
651 |
awaitTermination(t); |
652 |
assertEquals(0, q.remainingCapacity()); |
653 |
} |
654 |
|
655 |
/** |
656 |
* timed offer times out if full and elements not taken |
657 |
*/ |
658 |
public void testTimedOffer() { |
659 |
final LinkedBlockingDeque q = new LinkedBlockingDeque(2); |
660 |
final CountDownLatch pleaseInterrupt = new CountDownLatch(1); |
661 |
Thread t = newStartedThread(new CheckedRunnable() { |
662 |
public void realRun() throws InterruptedException { |
663 |
q.put(new Object()); |
664 |
q.put(new Object()); |
665 |
long startTime = System.nanoTime(); |
666 |
|
667 |
assertFalse(q.offer(new Object(), timeoutMillis(), MILLISECONDS)); |
668 |
assertTrue(millisElapsedSince(startTime) >= timeoutMillis()); |
669 |
|
670 |
Thread.currentThread().interrupt(); |
671 |
try { |
672 |
q.offer(new Object(), randomTimeout(), randomTimeUnit()); |
673 |
shouldThrow(); |
674 |
} catch (InterruptedException success) {} |
675 |
assertFalse(Thread.interrupted()); |
676 |
|
677 |
pleaseInterrupt.countDown(); |
678 |
try { |
679 |
q.offer(new Object(), LONGER_DELAY_MS, MILLISECONDS); |
680 |
shouldThrow(); |
681 |
} catch (InterruptedException success) {} |
682 |
assertFalse(Thread.interrupted()); |
683 |
}}); |
684 |
|
685 |
await(pleaseInterrupt); |
686 |
if (randomBoolean()) assertThreadBlocks(t, Thread.State.TIMED_WAITING); |
687 |
t.interrupt(); |
688 |
awaitTermination(t); |
689 |
} |
690 |
|
691 |
/** |
692 |
* take retrieves elements in FIFO order |
693 |
*/ |
694 |
public void testTake() throws InterruptedException { |
695 |
LinkedBlockingDeque q = populatedDeque(SIZE); |
696 |
for (int i = 0; i < SIZE; ++i) { |
697 |
assertEquals(i, q.take()); |
698 |
} |
699 |
} |
700 |
|
701 |
/** |
702 |
* take removes existing elements until empty, then blocks interruptibly |
703 |
*/ |
704 |
public void testBlockingTake() throws InterruptedException { |
705 |
final LinkedBlockingDeque q = populatedDeque(SIZE); |
706 |
final CountDownLatch pleaseInterrupt = new CountDownLatch(1); |
707 |
Thread t = newStartedThread(new CheckedRunnable() { |
708 |
public void realRun() throws InterruptedException { |
709 |
for (int i = 0; i < SIZE; i++) assertEquals(i, q.take()); |
710 |
|
711 |
Thread.currentThread().interrupt(); |
712 |
try { |
713 |
q.take(); |
714 |
shouldThrow(); |
715 |
} catch (InterruptedException success) {} |
716 |
assertFalse(Thread.interrupted()); |
717 |
|
718 |
pleaseInterrupt.countDown(); |
719 |
try { |
720 |
q.take(); |
721 |
shouldThrow(); |
722 |
} catch (InterruptedException success) {} |
723 |
assertFalse(Thread.interrupted()); |
724 |
}}); |
725 |
|
726 |
await(pleaseInterrupt); |
727 |
if (randomBoolean()) assertThreadBlocks(t, Thread.State.WAITING); |
728 |
t.interrupt(); |
729 |
awaitTermination(t); |
730 |
} |
731 |
|
732 |
/** |
733 |
* poll succeeds unless empty |
734 |
*/ |
735 |
public void testPoll() { |
736 |
LinkedBlockingDeque q = populatedDeque(SIZE); |
737 |
for (int i = 0; i < SIZE; ++i) { |
738 |
assertEquals(i, q.poll()); |
739 |
} |
740 |
assertNull(q.poll()); |
741 |
} |
742 |
|
743 |
/** |
744 |
* timed poll with zero timeout succeeds when non-empty, else times out |
745 |
*/ |
746 |
public void testTimedPoll0() throws InterruptedException { |
747 |
LinkedBlockingDeque q = populatedDeque(SIZE); |
748 |
for (int i = 0; i < SIZE; ++i) { |
749 |
assertEquals(i, q.poll(0, MILLISECONDS)); |
750 |
} |
751 |
assertNull(q.poll(0, MILLISECONDS)); |
752 |
} |
753 |
|
754 |
/** |
755 |
* timed poll with nonzero timeout succeeds when non-empty, else times out |
756 |
*/ |
757 |
public void testTimedPoll() throws InterruptedException { |
758 |
LinkedBlockingDeque q = populatedDeque(SIZE); |
759 |
for (int i = 0; i < SIZE; ++i) { |
760 |
long startTime = System.nanoTime(); |
761 |
assertEquals(i, q.poll(LONG_DELAY_MS, MILLISECONDS)); |
762 |
assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS); |
763 |
} |
764 |
long startTime = System.nanoTime(); |
765 |
assertNull(q.poll(timeoutMillis(), MILLISECONDS)); |
766 |
assertTrue(millisElapsedSince(startTime) >= timeoutMillis()); |
767 |
checkEmpty(q); |
768 |
} |
769 |
|
770 |
/** |
771 |
* Interrupted timed poll throws InterruptedException instead of |
772 |
* returning timeout status |
773 |
*/ |
774 |
public void testInterruptedTimedPoll() throws InterruptedException { |
775 |
final BlockingQueue<Integer> q = populatedDeque(SIZE); |
776 |
final CountDownLatch pleaseInterrupt = new CountDownLatch(1); |
777 |
Thread t = newStartedThread(new CheckedRunnable() { |
778 |
public void realRun() throws InterruptedException { |
779 |
for (int i = 0; i < SIZE; i++) |
780 |
assertEquals(i, (int) q.poll(LONG_DELAY_MS, MILLISECONDS)); |
781 |
|
782 |
Thread.currentThread().interrupt(); |
783 |
try { |
784 |
q.poll(randomTimeout(), randomTimeUnit()); |
785 |
shouldThrow(); |
786 |
} catch (InterruptedException success) {} |
787 |
assertFalse(Thread.interrupted()); |
788 |
|
789 |
pleaseInterrupt.countDown(); |
790 |
try { |
791 |
q.poll(LONGER_DELAY_MS, MILLISECONDS); |
792 |
shouldThrow(); |
793 |
} catch (InterruptedException success) {} |
794 |
assertFalse(Thread.interrupted()); |
795 |
}}); |
796 |
|
797 |
await(pleaseInterrupt); |
798 |
if (randomBoolean()) assertThreadBlocks(t, Thread.State.TIMED_WAITING); |
799 |
t.interrupt(); |
800 |
awaitTermination(t); |
801 |
checkEmpty(q); |
802 |
} |
803 |
|
804 |
/** |
805 |
* putFirst(null) throws NPE |
806 |
*/ |
807 |
public void testPutFirstNull() throws InterruptedException { |
808 |
LinkedBlockingDeque q = new LinkedBlockingDeque(SIZE); |
809 |
try { |
810 |
q.putFirst(null); |
811 |
shouldThrow(); |
812 |
} catch (NullPointerException success) {} |
813 |
} |
814 |
|
815 |
/** |
816 |
* all elements successfully putFirst are contained |
817 |
*/ |
818 |
public void testPutFirst() throws InterruptedException { |
819 |
LinkedBlockingDeque q = new LinkedBlockingDeque(SIZE); |
820 |
for (int i = 0; i < SIZE; ++i) { |
821 |
Integer x = new Integer(i); |
822 |
q.putFirst(x); |
823 |
assertTrue(q.contains(x)); |
824 |
} |
825 |
assertEquals(0, q.remainingCapacity()); |
826 |
} |
827 |
|
828 |
/** |
829 |
* putFirst blocks interruptibly if full |
830 |
*/ |
831 |
public void testBlockingPutFirst() throws InterruptedException { |
832 |
final LinkedBlockingDeque q = new LinkedBlockingDeque(SIZE); |
833 |
final CountDownLatch pleaseInterrupt = new CountDownLatch(1); |
834 |
Thread t = newStartedThread(new CheckedRunnable() { |
835 |
public void realRun() throws InterruptedException { |
836 |
for (int i = 0; i < SIZE; ++i) |
837 |
q.putFirst(i); |
838 |
assertEquals(SIZE, q.size()); |
839 |
assertEquals(0, q.remainingCapacity()); |
840 |
|
841 |
Thread.currentThread().interrupt(); |
842 |
try { |
843 |
q.putFirst(99); |
844 |
shouldThrow(); |
845 |
} catch (InterruptedException success) {} |
846 |
assertFalse(Thread.interrupted()); |
847 |
|
848 |
pleaseInterrupt.countDown(); |
849 |
try { |
850 |
q.putFirst(99); |
851 |
shouldThrow(); |
852 |
} catch (InterruptedException success) {} |
853 |
assertFalse(Thread.interrupted()); |
854 |
}}); |
855 |
|
856 |
await(pleaseInterrupt); |
857 |
if (randomBoolean()) assertThreadBlocks(t, Thread.State.WAITING); |
858 |
t.interrupt(); |
859 |
awaitTermination(t); |
860 |
assertEquals(SIZE, q.size()); |
861 |
assertEquals(0, q.remainingCapacity()); |
862 |
} |
863 |
|
864 |
/** |
865 |
* putFirst blocks interruptibly waiting for take when full |
866 |
*/ |
867 |
public void testPutFirstWithTake() throws InterruptedException { |
868 |
final int capacity = 2; |
869 |
final LinkedBlockingDeque q = new LinkedBlockingDeque(capacity); |
870 |
final CountDownLatch pleaseTake = new CountDownLatch(1); |
871 |
final CountDownLatch pleaseInterrupt = new CountDownLatch(1); |
872 |
Thread t = newStartedThread(new CheckedRunnable() { |
873 |
public void realRun() throws InterruptedException { |
874 |
for (int i = 0; i < capacity; i++) |
875 |
q.putFirst(i); |
876 |
pleaseTake.countDown(); |
877 |
q.putFirst(86); |
878 |
|
879 |
pleaseInterrupt.countDown(); |
880 |
try { |
881 |
q.putFirst(99); |
882 |
shouldThrow(); |
883 |
} catch (InterruptedException success) {} |
884 |
assertFalse(Thread.interrupted()); |
885 |
}}); |
886 |
|
887 |
await(pleaseTake); |
888 |
assertEquals(0, q.remainingCapacity()); |
889 |
assertEquals(capacity - 1, q.take()); |
890 |
|
891 |
await(pleaseInterrupt); |
892 |
if (randomBoolean()) assertThreadBlocks(t, Thread.State.WAITING); |
893 |
t.interrupt(); |
894 |
awaitTermination(t); |
895 |
assertEquals(0, q.remainingCapacity()); |
896 |
} |
897 |
|
898 |
/** |
899 |
* timed offerFirst times out if full and elements not taken |
900 |
*/ |
901 |
public void testTimedOfferFirst() { |
902 |
final LinkedBlockingDeque q = new LinkedBlockingDeque(2); |
903 |
final CountDownLatch pleaseInterrupt = new CountDownLatch(1); |
904 |
Thread t = newStartedThread(new CheckedRunnable() { |
905 |
public void realRun() throws InterruptedException { |
906 |
q.putFirst(new Object()); |
907 |
q.putFirst(new Object()); |
908 |
long startTime = System.nanoTime(); |
909 |
|
910 |
assertFalse(q.offerFirst(new Object(), timeoutMillis(), MILLISECONDS)); |
911 |
assertTrue(millisElapsedSince(startTime) >= timeoutMillis()); |
912 |
|
913 |
Thread.currentThread().interrupt(); |
914 |
try { |
915 |
q.offerFirst(new Object(), randomTimeout(), randomTimeUnit()); |
916 |
shouldThrow(); |
917 |
} catch (InterruptedException success) {} |
918 |
assertFalse(Thread.interrupted()); |
919 |
|
920 |
pleaseInterrupt.countDown(); |
921 |
try { |
922 |
q.offerFirst(new Object(), LONG_DELAY_MS, MILLISECONDS); |
923 |
shouldThrow(); |
924 |
} catch (InterruptedException success) {} |
925 |
assertFalse(Thread.interrupted()); |
926 |
|
927 |
assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS); |
928 |
}}); |
929 |
|
930 |
await(pleaseInterrupt); |
931 |
if (randomBoolean()) assertThreadBlocks(t, Thread.State.TIMED_WAITING); |
932 |
t.interrupt(); |
933 |
awaitTermination(t); |
934 |
} |
935 |
|
936 |
/** |
937 |
* take retrieves elements in FIFO order |
938 |
*/ |
939 |
public void testTakeFirst() throws InterruptedException { |
940 |
LinkedBlockingDeque q = populatedDeque(SIZE); |
941 |
for (int i = 0; i < SIZE; ++i) { |
942 |
assertEquals(i, q.takeFirst()); |
943 |
} |
944 |
} |
945 |
|
946 |
/** |
947 |
* takeFirst() blocks interruptibly when empty |
948 |
*/ |
949 |
public void testTakeFirstFromEmptyBlocksInterruptibly() { |
950 |
final BlockingDeque q = new LinkedBlockingDeque(); |
951 |
final CountDownLatch threadStarted = new CountDownLatch(1); |
952 |
Thread t = newStartedThread(new CheckedRunnable() { |
953 |
public void realRun() { |
954 |
threadStarted.countDown(); |
955 |
try { |
956 |
q.takeFirst(); |
957 |
shouldThrow(); |
958 |
} catch (InterruptedException success) {} |
959 |
assertFalse(Thread.interrupted()); |
960 |
}}); |
961 |
|
962 |
await(threadStarted); |
963 |
if (randomBoolean()) assertThreadBlocks(t, Thread.State.WAITING); |
964 |
t.interrupt(); |
965 |
awaitTermination(t); |
966 |
} |
967 |
|
968 |
/** |
969 |
* takeFirst() throws InterruptedException immediately if interrupted |
970 |
* before waiting |
971 |
*/ |
972 |
public void testTakeFirstFromEmptyAfterInterrupt() { |
973 |
final BlockingDeque q = new LinkedBlockingDeque(); |
974 |
Thread t = newStartedThread(new CheckedRunnable() { |
975 |
public void realRun() { |
976 |
Thread.currentThread().interrupt(); |
977 |
try { |
978 |
q.takeFirst(); |
979 |
shouldThrow(); |
980 |
} catch (InterruptedException success) {} |
981 |
assertFalse(Thread.interrupted()); |
982 |
}}); |
983 |
|
984 |
awaitTermination(t); |
985 |
} |
986 |
|
987 |
/** |
988 |
* takeLast() blocks interruptibly when empty |
989 |
*/ |
990 |
public void testTakeLastFromEmptyBlocksInterruptibly() { |
991 |
final BlockingDeque q = new LinkedBlockingDeque(); |
992 |
final CountDownLatch threadStarted = new CountDownLatch(1); |
993 |
Thread t = newStartedThread(new CheckedRunnable() { |
994 |
public void realRun() { |
995 |
threadStarted.countDown(); |
996 |
try { |
997 |
q.takeLast(); |
998 |
shouldThrow(); |
999 |
} catch (InterruptedException success) {} |
1000 |
assertFalse(Thread.interrupted()); |
1001 |
}}); |
1002 |
|
1003 |
await(threadStarted); |
1004 |
if (randomBoolean()) assertThreadBlocks(t, Thread.State.WAITING); |
1005 |
t.interrupt(); |
1006 |
awaitTermination(t); |
1007 |
} |
1008 |
|
1009 |
/** |
1010 |
* takeLast() throws InterruptedException immediately if interrupted |
1011 |
* before waiting |
1012 |
*/ |
1013 |
public void testTakeLastFromEmptyAfterInterrupt() { |
1014 |
final BlockingDeque q = new LinkedBlockingDeque(); |
1015 |
Thread t = newStartedThread(new CheckedRunnable() { |
1016 |
public void realRun() { |
1017 |
Thread.currentThread().interrupt(); |
1018 |
try { |
1019 |
q.takeLast(); |
1020 |
shouldThrow(); |
1021 |
} catch (InterruptedException success) {} |
1022 |
assertFalse(Thread.interrupted()); |
1023 |
}}); |
1024 |
|
1025 |
awaitTermination(t); |
1026 |
} |
1027 |
|
1028 |
/** |
1029 |
* takeFirst removes existing elements until empty, then blocks interruptibly |
1030 |
*/ |
1031 |
public void testBlockingTakeFirst() throws InterruptedException { |
1032 |
final LinkedBlockingDeque q = populatedDeque(SIZE); |
1033 |
final CountDownLatch pleaseInterrupt = new CountDownLatch(1); |
1034 |
Thread t = newStartedThread(new CheckedRunnable() { |
1035 |
public void realRun() throws InterruptedException { |
1036 |
for (int i = 0; i < SIZE; i++) assertEquals(i, q.takeFirst()); |
1037 |
|
1038 |
Thread.currentThread().interrupt(); |
1039 |
try { |
1040 |
q.takeFirst(); |
1041 |
shouldThrow(); |
1042 |
} catch (InterruptedException success) {} |
1043 |
assertFalse(Thread.interrupted()); |
1044 |
|
1045 |
pleaseInterrupt.countDown(); |
1046 |
try { |
1047 |
q.takeFirst(); |
1048 |
shouldThrow(); |
1049 |
} catch (InterruptedException success) {} |
1050 |
assertFalse(Thread.interrupted()); |
1051 |
}}); |
1052 |
|
1053 |
await(pleaseInterrupt); |
1054 |
if (randomBoolean()) assertThreadBlocks(t, Thread.State.WAITING); |
1055 |
t.interrupt(); |
1056 |
awaitTermination(t); |
1057 |
} |
1058 |
|
1059 |
/** |
1060 |
* timed pollFirst with zero timeout succeeds when non-empty, else times out |
1061 |
*/ |
1062 |
public void testTimedPollFirst0() throws InterruptedException { |
1063 |
LinkedBlockingDeque q = populatedDeque(SIZE); |
1064 |
for (int i = 0; i < SIZE; ++i) { |
1065 |
assertEquals(i, q.pollFirst(0, MILLISECONDS)); |
1066 |
} |
1067 |
assertNull(q.pollFirst(0, MILLISECONDS)); |
1068 |
} |
1069 |
|
1070 |
/** |
1071 |
* timed pollFirst with nonzero timeout succeeds when non-empty, else times out |
1072 |
*/ |
1073 |
public void testTimedPollFirst() throws InterruptedException { |
1074 |
LinkedBlockingDeque q = populatedDeque(SIZE); |
1075 |
for (int i = 0; i < SIZE; ++i) { |
1076 |
long startTime = System.nanoTime(); |
1077 |
assertEquals(i, q.pollFirst(LONG_DELAY_MS, MILLISECONDS)); |
1078 |
assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS); |
1079 |
} |
1080 |
long startTime = System.nanoTime(); |
1081 |
assertNull(q.pollFirst(timeoutMillis(), MILLISECONDS)); |
1082 |
assertTrue(millisElapsedSince(startTime) >= timeoutMillis()); |
1083 |
checkEmpty(q); |
1084 |
} |
1085 |
|
1086 |
/** |
1087 |
* Interrupted timed pollFirst throws InterruptedException instead of |
1088 |
* returning timeout status |
1089 |
*/ |
1090 |
public void testInterruptedTimedPollFirst() throws InterruptedException { |
1091 |
final LinkedBlockingDeque q = populatedDeque(SIZE); |
1092 |
final CountDownLatch pleaseInterrupt = new CountDownLatch(1); |
1093 |
Thread t = newStartedThread(new CheckedRunnable() { |
1094 |
public void realRun() throws InterruptedException { |
1095 |
for (int i = 0; i < SIZE; i++) |
1096 |
assertEquals(i, q.pollFirst(LONG_DELAY_MS, MILLISECONDS)); |
1097 |
|
1098 |
Thread.currentThread().interrupt(); |
1099 |
try { |
1100 |
q.pollFirst(randomTimeout(), randomTimeUnit()); |
1101 |
shouldThrow(); |
1102 |
} catch (InterruptedException success) {} |
1103 |
assertFalse(Thread.interrupted()); |
1104 |
|
1105 |
pleaseInterrupt.countDown(); |
1106 |
try { |
1107 |
q.pollFirst(LONGER_DELAY_MS, MILLISECONDS); |
1108 |
shouldThrow(); |
1109 |
} catch (InterruptedException success) {} |
1110 |
assertFalse(Thread.interrupted()); |
1111 |
}}); |
1112 |
|
1113 |
await(pleaseInterrupt); |
1114 |
if (randomBoolean()) assertThreadBlocks(t, Thread.State.TIMED_WAITING); |
1115 |
t.interrupt(); |
1116 |
awaitTermination(t); |
1117 |
} |
1118 |
|
1119 |
/** |
1120 |
* timed pollFirst before a delayed offerFirst fails; after offerFirst succeeds; |
1121 |
* on interruption throws |
1122 |
*/ |
1123 |
public void testTimedPollFirstWithOfferFirst() throws InterruptedException { |
1124 |
final LinkedBlockingDeque q = new LinkedBlockingDeque(2); |
1125 |
final CheckedBarrier barrier = new CheckedBarrier(2); |
1126 |
Thread t = newStartedThread(new CheckedRunnable() { |
1127 |
public void realRun() throws InterruptedException { |
1128 |
long startTime = System.nanoTime(); |
1129 |
assertNull(q.pollFirst(timeoutMillis(), MILLISECONDS)); |
1130 |
assertTrue(millisElapsedSince(startTime) >= timeoutMillis()); |
1131 |
|
1132 |
barrier.await(); |
1133 |
|
1134 |
assertSame(zero, q.pollFirst(LONG_DELAY_MS, MILLISECONDS)); |
1135 |
|
1136 |
Thread.currentThread().interrupt(); |
1137 |
try { |
1138 |
q.pollFirst(randomTimeout(), randomTimeUnit()); |
1139 |
shouldThrow(); |
1140 |
} catch (InterruptedException success) {} |
1141 |
|
1142 |
barrier.await(); |
1143 |
try { |
1144 |
q.pollFirst(LONG_DELAY_MS, MILLISECONDS); |
1145 |
shouldThrow(); |
1146 |
} catch (InterruptedException success) {} |
1147 |
assertFalse(Thread.interrupted()); |
1148 |
|
1149 |
assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS); |
1150 |
}}); |
1151 |
|
1152 |
barrier.await(); |
1153 |
long startTime = System.nanoTime(); |
1154 |
assertTrue(q.offerFirst(zero, LONG_DELAY_MS, MILLISECONDS)); |
1155 |
assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS); |
1156 |
barrier.await(); |
1157 |
if (randomBoolean()) assertThreadBlocks(t, Thread.State.TIMED_WAITING); |
1158 |
t.interrupt(); |
1159 |
awaitTermination(t); |
1160 |
} |
1161 |
|
1162 |
/** |
1163 |
* putLast(null) throws NPE |
1164 |
*/ |
1165 |
public void testPutLastNull() throws InterruptedException { |
1166 |
LinkedBlockingDeque q = new LinkedBlockingDeque(SIZE); |
1167 |
try { |
1168 |
q.putLast(null); |
1169 |
shouldThrow(); |
1170 |
} catch (NullPointerException success) {} |
1171 |
} |
1172 |
|
1173 |
/** |
1174 |
* all elements successfully putLast are contained |
1175 |
*/ |
1176 |
public void testPutLast() throws InterruptedException { |
1177 |
LinkedBlockingDeque q = new LinkedBlockingDeque(SIZE); |
1178 |
for (int i = 0; i < SIZE; ++i) { |
1179 |
Integer x = new Integer(i); |
1180 |
q.putLast(x); |
1181 |
assertTrue(q.contains(x)); |
1182 |
} |
1183 |
assertEquals(0, q.remainingCapacity()); |
1184 |
} |
1185 |
|
1186 |
/** |
1187 |
* putLast blocks interruptibly if full |
1188 |
*/ |
1189 |
public void testBlockingPutLast() throws InterruptedException { |
1190 |
final LinkedBlockingDeque q = new LinkedBlockingDeque(SIZE); |
1191 |
final CountDownLatch pleaseInterrupt = new CountDownLatch(1); |
1192 |
Thread t = newStartedThread(new CheckedRunnable() { |
1193 |
public void realRun() throws InterruptedException { |
1194 |
for (int i = 0; i < SIZE; ++i) |
1195 |
q.putLast(i); |
1196 |
assertEquals(SIZE, q.size()); |
1197 |
assertEquals(0, q.remainingCapacity()); |
1198 |
|
1199 |
Thread.currentThread().interrupt(); |
1200 |
try { |
1201 |
q.putLast(99); |
1202 |
shouldThrow(); |
1203 |
} catch (InterruptedException success) {} |
1204 |
assertFalse(Thread.interrupted()); |
1205 |
|
1206 |
pleaseInterrupt.countDown(); |
1207 |
try { |
1208 |
q.putLast(99); |
1209 |
shouldThrow(); |
1210 |
} catch (InterruptedException success) {} |
1211 |
assertFalse(Thread.interrupted()); |
1212 |
}}); |
1213 |
|
1214 |
await(pleaseInterrupt); |
1215 |
if (randomBoolean()) assertThreadBlocks(t, Thread.State.WAITING); |
1216 |
t.interrupt(); |
1217 |
awaitTermination(t); |
1218 |
assertEquals(SIZE, q.size()); |
1219 |
assertEquals(0, q.remainingCapacity()); |
1220 |
} |
1221 |
|
1222 |
/** |
1223 |
* putLast blocks interruptibly waiting for take when full |
1224 |
*/ |
1225 |
public void testPutLastWithTake() throws InterruptedException { |
1226 |
final int capacity = 2; |
1227 |
final LinkedBlockingDeque q = new LinkedBlockingDeque(capacity); |
1228 |
final CountDownLatch pleaseTake = new CountDownLatch(1); |
1229 |
final CountDownLatch pleaseInterrupt = new CountDownLatch(1); |
1230 |
Thread t = newStartedThread(new CheckedRunnable() { |
1231 |
public void realRun() throws InterruptedException { |
1232 |
for (int i = 0; i < capacity; i++) |
1233 |
q.putLast(i); |
1234 |
pleaseTake.countDown(); |
1235 |
q.putLast(86); |
1236 |
|
1237 |
Thread.currentThread().interrupt(); |
1238 |
try { |
1239 |
q.putLast(99); |
1240 |
shouldThrow(); |
1241 |
} catch (InterruptedException success) {} |
1242 |
assertFalse(Thread.interrupted()); |
1243 |
|
1244 |
pleaseInterrupt.countDown(); |
1245 |
try { |
1246 |
q.putLast(99); |
1247 |
shouldThrow(); |
1248 |
} catch (InterruptedException success) {} |
1249 |
assertFalse(Thread.interrupted()); |
1250 |
}}); |
1251 |
|
1252 |
await(pleaseTake); |
1253 |
assertEquals(0, q.remainingCapacity()); |
1254 |
assertEquals(0, q.take()); |
1255 |
|
1256 |
await(pleaseInterrupt); |
1257 |
if (randomBoolean()) assertThreadBlocks(t, Thread.State.WAITING); |
1258 |
t.interrupt(); |
1259 |
awaitTermination(t); |
1260 |
assertEquals(0, q.remainingCapacity()); |
1261 |
} |
1262 |
|
1263 |
/** |
1264 |
* timed offerLast times out if full and elements not taken |
1265 |
*/ |
1266 |
public void testTimedOfferLast() { |
1267 |
final LinkedBlockingDeque q = new LinkedBlockingDeque(2); |
1268 |
final CountDownLatch pleaseInterrupt = new CountDownLatch(1); |
1269 |
Thread t = newStartedThread(new CheckedRunnable() { |
1270 |
public void realRun() throws InterruptedException { |
1271 |
q.putLast(new Object()); |
1272 |
q.putLast(new Object()); |
1273 |
long startTime = System.nanoTime(); |
1274 |
|
1275 |
assertFalse(q.offerLast(new Object(), timeoutMillis(), MILLISECONDS)); |
1276 |
assertTrue(millisElapsedSince(startTime) >= timeoutMillis()); |
1277 |
|
1278 |
Thread.currentThread().interrupt(); |
1279 |
try { |
1280 |
q.offerLast(new Object(), randomTimeout(), randomTimeUnit()); |
1281 |
shouldThrow(); |
1282 |
} catch (InterruptedException success) {} |
1283 |
|
1284 |
pleaseInterrupt.countDown(); |
1285 |
try { |
1286 |
q.offerLast(new Object(), LONG_DELAY_MS, MILLISECONDS); |
1287 |
shouldThrow(); |
1288 |
} catch (InterruptedException success) {} |
1289 |
|
1290 |
assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS); |
1291 |
}}); |
1292 |
|
1293 |
await(pleaseInterrupt); |
1294 |
if (randomBoolean()) assertThreadBlocks(t, Thread.State.TIMED_WAITING); |
1295 |
t.interrupt(); |
1296 |
awaitTermination(t); |
1297 |
} |
1298 |
|
1299 |
/** |
1300 |
* takeLast retrieves elements in FIFO order |
1301 |
*/ |
1302 |
public void testTakeLast() throws InterruptedException { |
1303 |
LinkedBlockingDeque q = populatedDeque(SIZE); |
1304 |
for (int i = 0; i < SIZE; ++i) { |
1305 |
assertEquals(SIZE - i - 1, q.takeLast()); |
1306 |
} |
1307 |
} |
1308 |
|
1309 |
/** |
1310 |
* takeLast removes existing elements until empty, then blocks interruptibly |
1311 |
*/ |
1312 |
public void testBlockingTakeLast() throws InterruptedException { |
1313 |
final LinkedBlockingDeque q = populatedDeque(SIZE); |
1314 |
final CountDownLatch pleaseInterrupt = new CountDownLatch(1); |
1315 |
Thread t = newStartedThread(new CheckedRunnable() { |
1316 |
public void realRun() throws InterruptedException { |
1317 |
for (int i = 0; i < SIZE; i++) |
1318 |
assertEquals(SIZE - i - 1, q.takeLast()); |
1319 |
|
1320 |
Thread.currentThread().interrupt(); |
1321 |
try { |
1322 |
q.takeLast(); |
1323 |
shouldThrow(); |
1324 |
} catch (InterruptedException success) {} |
1325 |
assertFalse(Thread.interrupted()); |
1326 |
|
1327 |
pleaseInterrupt.countDown(); |
1328 |
try { |
1329 |
q.takeLast(); |
1330 |
shouldThrow(); |
1331 |
} catch (InterruptedException success) {} |
1332 |
assertFalse(Thread.interrupted()); |
1333 |
}}); |
1334 |
|
1335 |
await(pleaseInterrupt); |
1336 |
if (randomBoolean()) assertThreadBlocks(t, Thread.State.WAITING); |
1337 |
t.interrupt(); |
1338 |
awaitTermination(t); |
1339 |
} |
1340 |
|
1341 |
/** |
1342 |
* timed pollLast with zero timeout succeeds when non-empty, else times out |
1343 |
*/ |
1344 |
public void testTimedPollLast0() throws InterruptedException { |
1345 |
LinkedBlockingDeque q = populatedDeque(SIZE); |
1346 |
for (int i = 0; i < SIZE; ++i) { |
1347 |
assertEquals(SIZE - i - 1, q.pollLast(0, MILLISECONDS)); |
1348 |
} |
1349 |
assertNull(q.pollLast(0, MILLISECONDS)); |
1350 |
} |
1351 |
|
1352 |
/** |
1353 |
* timed pollLast with nonzero timeout succeeds when non-empty, else times out |
1354 |
*/ |
1355 |
public void testTimedPollLast() throws InterruptedException { |
1356 |
LinkedBlockingDeque q = populatedDeque(SIZE); |
1357 |
for (int i = 0; i < SIZE; ++i) { |
1358 |
long startTime = System.nanoTime(); |
1359 |
assertEquals(SIZE - i - 1, q.pollLast(LONG_DELAY_MS, MILLISECONDS)); |
1360 |
assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS); |
1361 |
} |
1362 |
long startTime = System.nanoTime(); |
1363 |
assertNull(q.pollLast(timeoutMillis(), MILLISECONDS)); |
1364 |
assertTrue(millisElapsedSince(startTime) >= timeoutMillis()); |
1365 |
checkEmpty(q); |
1366 |
} |
1367 |
|
1368 |
/** |
1369 |
* Interrupted timed pollLast throws InterruptedException instead of |
1370 |
* returning timeout status |
1371 |
*/ |
1372 |
public void testInterruptedTimedPollLast() throws InterruptedException { |
1373 |
final LinkedBlockingDeque q = populatedDeque(SIZE); |
1374 |
final CountDownLatch pleaseInterrupt = new CountDownLatch(1); |
1375 |
Thread t = newStartedThread(new CheckedRunnable() { |
1376 |
public void realRun() throws InterruptedException { |
1377 |
for (int i = 0; i < SIZE; i++) |
1378 |
assertEquals(SIZE - i - 1, |
1379 |
q.pollLast(LONG_DELAY_MS, MILLISECONDS)); |
1380 |
|
1381 |
Thread.currentThread().interrupt(); |
1382 |
try { |
1383 |
q.pollLast(randomTimeout(), randomTimeUnit()); |
1384 |
shouldThrow(); |
1385 |
} catch (InterruptedException success) {} |
1386 |
assertFalse(Thread.interrupted()); |
1387 |
|
1388 |
pleaseInterrupt.countDown(); |
1389 |
try { |
1390 |
q.pollLast(LONGER_DELAY_MS, MILLISECONDS); |
1391 |
shouldThrow(); |
1392 |
} catch (InterruptedException success) {} |
1393 |
assertFalse(Thread.interrupted()); |
1394 |
}}); |
1395 |
|
1396 |
await(pleaseInterrupt); |
1397 |
if (randomBoolean()) assertThreadBlocks(t, Thread.State.TIMED_WAITING); |
1398 |
t.interrupt(); |
1399 |
awaitTermination(t); |
1400 |
checkEmpty(q); |
1401 |
} |
1402 |
|
1403 |
/** |
1404 |
* timed poll before a delayed offerLast fails; after offerLast succeeds; |
1405 |
* on interruption throws |
1406 |
*/ |
1407 |
public void testTimedPollWithOfferLast() throws InterruptedException { |
1408 |
final LinkedBlockingDeque q = new LinkedBlockingDeque(2); |
1409 |
final CheckedBarrier barrier = new CheckedBarrier(2); |
1410 |
Thread t = newStartedThread(new CheckedRunnable() { |
1411 |
public void realRun() throws InterruptedException { |
1412 |
long startTime = System.nanoTime(); |
1413 |
assertNull(q.poll(timeoutMillis(), MILLISECONDS)); |
1414 |
assertTrue(millisElapsedSince(startTime) >= timeoutMillis()); |
1415 |
|
1416 |
barrier.await(); |
1417 |
|
1418 |
assertSame(zero, q.poll(LONG_DELAY_MS, MILLISECONDS)); |
1419 |
|
1420 |
Thread.currentThread().interrupt(); |
1421 |
try { |
1422 |
q.poll(randomTimeout(), randomTimeUnit()); |
1423 |
shouldThrow(); |
1424 |
} catch (InterruptedException success) {} |
1425 |
assertFalse(Thread.interrupted()); |
1426 |
|
1427 |
barrier.await(); |
1428 |
try { |
1429 |
q.poll(LONG_DELAY_MS, MILLISECONDS); |
1430 |
shouldThrow(); |
1431 |
} catch (InterruptedException success) {} |
1432 |
assertFalse(Thread.interrupted()); |
1433 |
|
1434 |
assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS); |
1435 |
}}); |
1436 |
|
1437 |
barrier.await(); |
1438 |
long startTime = System.nanoTime(); |
1439 |
assertTrue(q.offerLast(zero, LONG_DELAY_MS, MILLISECONDS)); |
1440 |
assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS); |
1441 |
|
1442 |
barrier.await(); |
1443 |
if (randomBoolean()) assertThreadBlocks(t, Thread.State.TIMED_WAITING); |
1444 |
t.interrupt(); |
1445 |
awaitTermination(t); |
1446 |
} |
1447 |
|
1448 |
/** |
1449 |
* element returns next element, or throws NSEE if empty |
1450 |
*/ |
1451 |
public void testElement() { |
1452 |
LinkedBlockingDeque q = populatedDeque(SIZE); |
1453 |
for (int i = 0; i < SIZE; ++i) { |
1454 |
assertEquals(i, q.element()); |
1455 |
q.poll(); |
1456 |
} |
1457 |
try { |
1458 |
q.element(); |
1459 |
shouldThrow(); |
1460 |
} catch (NoSuchElementException success) {} |
1461 |
} |
1462 |
|
1463 |
/** |
1464 |
* contains(x) reports true when elements added but not yet removed |
1465 |
*/ |
1466 |
public void testContains() { |
1467 |
LinkedBlockingDeque q = populatedDeque(SIZE); |
1468 |
for (int i = 0; i < SIZE; ++i) { |
1469 |
assertTrue(q.contains(new Integer(i))); |
1470 |
q.poll(); |
1471 |
assertFalse(q.contains(new Integer(i))); |
1472 |
} |
1473 |
} |
1474 |
|
1475 |
/** |
1476 |
* clear removes all elements |
1477 |
*/ |
1478 |
public void testClear() { |
1479 |
LinkedBlockingDeque q = populatedDeque(SIZE); |
1480 |
q.clear(); |
1481 |
assertTrue(q.isEmpty()); |
1482 |
assertEquals(0, q.size()); |
1483 |
assertEquals(SIZE, q.remainingCapacity()); |
1484 |
q.add(one); |
1485 |
assertFalse(q.isEmpty()); |
1486 |
assertTrue(q.contains(one)); |
1487 |
q.clear(); |
1488 |
assertTrue(q.isEmpty()); |
1489 |
} |
1490 |
|
1491 |
/** |
1492 |
* containsAll(c) is true when c contains a subset of elements |
1493 |
*/ |
1494 |
public void testContainsAll() { |
1495 |
LinkedBlockingDeque q = populatedDeque(SIZE); |
1496 |
LinkedBlockingDeque p = new LinkedBlockingDeque(SIZE); |
1497 |
for (int i = 0; i < SIZE; ++i) { |
1498 |
assertTrue(q.containsAll(p)); |
1499 |
assertFalse(p.containsAll(q)); |
1500 |
p.add(new Integer(i)); |
1501 |
} |
1502 |
assertTrue(p.containsAll(q)); |
1503 |
} |
1504 |
|
1505 |
/** |
1506 |
* retainAll(c) retains only those elements of c and reports true if changed |
1507 |
*/ |
1508 |
public void testRetainAll() { |
1509 |
LinkedBlockingDeque q = populatedDeque(SIZE); |
1510 |
LinkedBlockingDeque p = populatedDeque(SIZE); |
1511 |
for (int i = 0; i < SIZE; ++i) { |
1512 |
boolean changed = q.retainAll(p); |
1513 |
if (i == 0) |
1514 |
assertFalse(changed); |
1515 |
else |
1516 |
assertTrue(changed); |
1517 |
|
1518 |
assertTrue(q.containsAll(p)); |
1519 |
assertEquals(SIZE - i, q.size()); |
1520 |
p.remove(); |
1521 |
} |
1522 |
} |
1523 |
|
1524 |
/** |
1525 |
* removeAll(c) removes only those elements of c and reports true if changed |
1526 |
*/ |
1527 |
public void testRemoveAll() { |
1528 |
for (int i = 1; i < SIZE; ++i) { |
1529 |
LinkedBlockingDeque q = populatedDeque(SIZE); |
1530 |
LinkedBlockingDeque p = populatedDeque(i); |
1531 |
assertTrue(q.removeAll(p)); |
1532 |
assertEquals(SIZE - i, q.size()); |
1533 |
for (int j = 0; j < i; ++j) { |
1534 |
Integer x = (Integer)(p.remove()); |
1535 |
assertFalse(q.contains(x)); |
1536 |
} |
1537 |
} |
1538 |
} |
1539 |
|
1540 |
/** |
1541 |
* toArray contains all elements in FIFO order |
1542 |
*/ |
1543 |
public void testToArray() throws InterruptedException { |
1544 |
LinkedBlockingDeque q = populatedDeque(SIZE); |
1545 |
Object[] a = q.toArray(); |
1546 |
assertSame(Object[].class, a.getClass()); |
1547 |
for (Object o : a) |
1548 |
assertSame(o, q.poll()); |
1549 |
assertTrue(q.isEmpty()); |
1550 |
} |
1551 |
|
1552 |
/** |
1553 |
* toArray(a) contains all elements in FIFO order |
1554 |
*/ |
1555 |
public void testToArray2() { |
1556 |
LinkedBlockingDeque<Integer> q = populatedDeque(SIZE); |
1557 |
Integer[] ints = new Integer[SIZE]; |
1558 |
Integer[] array = q.toArray(ints); |
1559 |
assertSame(ints, array); |
1560 |
for (Integer o : ints) |
1561 |
assertSame(o, q.remove()); |
1562 |
assertTrue(q.isEmpty()); |
1563 |
} |
1564 |
|
1565 |
/** |
1566 |
* toArray(incompatible array type) throws ArrayStoreException |
1567 |
*/ |
1568 |
public void testToArray1_BadArg() { |
1569 |
LinkedBlockingDeque q = populatedDeque(SIZE); |
1570 |
try { |
1571 |
q.toArray(new String[10]); |
1572 |
shouldThrow(); |
1573 |
} catch (ArrayStoreException success) {} |
1574 |
} |
1575 |
|
1576 |
/** |
1577 |
* iterator iterates through all elements |
1578 |
*/ |
1579 |
public void testIterator() throws InterruptedException { |
1580 |
LinkedBlockingDeque q = populatedDeque(SIZE); |
1581 |
Iterator it = q.iterator(); |
1582 |
int i; |
1583 |
for (i = 0; it.hasNext(); i++) |
1584 |
assertTrue(q.contains(it.next())); |
1585 |
assertEquals(i, SIZE); |
1586 |
assertIteratorExhausted(it); |
1587 |
|
1588 |
it = q.iterator(); |
1589 |
for (i = 0; it.hasNext(); i++) |
1590 |
assertEquals(it.next(), q.take()); |
1591 |
assertEquals(i, SIZE); |
1592 |
assertIteratorExhausted(it); |
1593 |
} |
1594 |
|
1595 |
/** |
1596 |
* iterator of empty collection has no elements |
1597 |
*/ |
1598 |
public void testEmptyIterator() { |
1599 |
Deque c = new LinkedBlockingDeque(); |
1600 |
assertIteratorExhausted(c.iterator()); |
1601 |
assertIteratorExhausted(c.descendingIterator()); |
1602 |
} |
1603 |
|
1604 |
/** |
1605 |
* iterator.remove removes current element |
1606 |
*/ |
1607 |
public void testIteratorRemove() { |
1608 |
final LinkedBlockingDeque q = new LinkedBlockingDeque(3); |
1609 |
q.add(two); |
1610 |
q.add(one); |
1611 |
q.add(three); |
1612 |
|
1613 |
Iterator it = q.iterator(); |
1614 |
it.next(); |
1615 |
it.remove(); |
1616 |
|
1617 |
it = q.iterator(); |
1618 |
assertSame(it.next(), one); |
1619 |
assertSame(it.next(), three); |
1620 |
assertFalse(it.hasNext()); |
1621 |
} |
1622 |
|
1623 |
/** |
1624 |
* iterator ordering is FIFO |
1625 |
*/ |
1626 |
public void testIteratorOrdering() { |
1627 |
final LinkedBlockingDeque q = new LinkedBlockingDeque(3); |
1628 |
q.add(one); |
1629 |
q.add(two); |
1630 |
q.add(three); |
1631 |
assertEquals(0, q.remainingCapacity()); |
1632 |
int k = 0; |
1633 |
for (Iterator it = q.iterator(); it.hasNext();) { |
1634 |
assertEquals(++k, it.next()); |
1635 |
} |
1636 |
assertEquals(3, k); |
1637 |
} |
1638 |
|
1639 |
/** |
1640 |
* Modifications do not cause iterators to fail |
1641 |
*/ |
1642 |
public void testWeaklyConsistentIteration() { |
1643 |
final LinkedBlockingDeque q = new LinkedBlockingDeque(3); |
1644 |
q.add(one); |
1645 |
q.add(two); |
1646 |
q.add(three); |
1647 |
for (Iterator it = q.iterator(); it.hasNext();) { |
1648 |
q.remove(); |
1649 |
it.next(); |
1650 |
} |
1651 |
assertEquals(0, q.size()); |
1652 |
} |
1653 |
|
1654 |
/** |
1655 |
* Descending iterator iterates through all elements |
1656 |
*/ |
1657 |
public void testDescendingIterator() { |
1658 |
LinkedBlockingDeque q = populatedDeque(SIZE); |
1659 |
int i = 0; |
1660 |
Iterator it = q.descendingIterator(); |
1661 |
while (it.hasNext()) { |
1662 |
assertTrue(q.contains(it.next())); |
1663 |
++i; |
1664 |
} |
1665 |
assertEquals(i, SIZE); |
1666 |
assertFalse(it.hasNext()); |
1667 |
try { |
1668 |
it.next(); |
1669 |
shouldThrow(); |
1670 |
} catch (NoSuchElementException success) {} |
1671 |
} |
1672 |
|
1673 |
/** |
1674 |
* Descending iterator ordering is reverse FIFO |
1675 |
*/ |
1676 |
public void testDescendingIteratorOrdering() { |
1677 |
final LinkedBlockingDeque q = new LinkedBlockingDeque(); |
1678 |
for (int iters = 0; iters < 100; ++iters) { |
1679 |
q.add(new Integer(3)); |
1680 |
q.add(new Integer(2)); |
1681 |
q.add(new Integer(1)); |
1682 |
int k = 0; |
1683 |
for (Iterator it = q.descendingIterator(); it.hasNext();) { |
1684 |
assertEquals(++k, it.next()); |
1685 |
} |
1686 |
|
1687 |
assertEquals(3, k); |
1688 |
q.remove(); |
1689 |
q.remove(); |
1690 |
q.remove(); |
1691 |
} |
1692 |
} |
1693 |
|
1694 |
/** |
1695 |
* descendingIterator.remove removes current element |
1696 |
*/ |
1697 |
public void testDescendingIteratorRemove() { |
1698 |
final LinkedBlockingDeque q = new LinkedBlockingDeque(); |
1699 |
for (int iters = 0; iters < 100; ++iters) { |
1700 |
q.add(new Integer(3)); |
1701 |
q.add(new Integer(2)); |
1702 |
q.add(new Integer(1)); |
1703 |
Iterator it = q.descendingIterator(); |
1704 |
assertEquals(it.next(), new Integer(1)); |
1705 |
it.remove(); |
1706 |
assertEquals(it.next(), new Integer(2)); |
1707 |
it = q.descendingIterator(); |
1708 |
assertEquals(it.next(), new Integer(2)); |
1709 |
assertEquals(it.next(), new Integer(3)); |
1710 |
it.remove(); |
1711 |
assertFalse(it.hasNext()); |
1712 |
q.remove(); |
1713 |
} |
1714 |
} |
1715 |
|
1716 |
/** |
1717 |
* toString contains toStrings of elements |
1718 |
*/ |
1719 |
public void testToString() { |
1720 |
LinkedBlockingDeque q = populatedDeque(SIZE); |
1721 |
String s = q.toString(); |
1722 |
for (int i = 0; i < SIZE; ++i) { |
1723 |
assertTrue(s.contains(String.valueOf(i))); |
1724 |
} |
1725 |
} |
1726 |
|
1727 |
/** |
1728 |
* offer transfers elements across Executor tasks |
1729 |
*/ |
1730 |
public void testOfferInExecutor() { |
1731 |
final LinkedBlockingDeque q = new LinkedBlockingDeque(2); |
1732 |
q.add(one); |
1733 |
q.add(two); |
1734 |
final CheckedBarrier threadsStarted = new CheckedBarrier(2); |
1735 |
final ExecutorService executor = Executors.newFixedThreadPool(2); |
1736 |
try (PoolCleaner cleaner = cleaner(executor)) { |
1737 |
executor.execute(new CheckedRunnable() { |
1738 |
public void realRun() throws InterruptedException { |
1739 |
assertFalse(q.offer(three)); |
1740 |
threadsStarted.await(); |
1741 |
assertTrue(q.offer(three, LONG_DELAY_MS, MILLISECONDS)); |
1742 |
assertEquals(0, q.remainingCapacity()); |
1743 |
}}); |
1744 |
|
1745 |
executor.execute(new CheckedRunnable() { |
1746 |
public void realRun() throws InterruptedException { |
1747 |
threadsStarted.await(); |
1748 |
assertSame(one, q.take()); |
1749 |
}}); |
1750 |
} |
1751 |
} |
1752 |
|
1753 |
/** |
1754 |
* timed poll retrieves elements across Executor threads |
1755 |
*/ |
1756 |
public void testPollInExecutor() { |
1757 |
final LinkedBlockingDeque q = new LinkedBlockingDeque(2); |
1758 |
final CheckedBarrier threadsStarted = new CheckedBarrier(2); |
1759 |
final ExecutorService executor = Executors.newFixedThreadPool(2); |
1760 |
try (PoolCleaner cleaner = cleaner(executor)) { |
1761 |
executor.execute(new CheckedRunnable() { |
1762 |
public void realRun() throws InterruptedException { |
1763 |
assertNull(q.poll()); |
1764 |
threadsStarted.await(); |
1765 |
assertSame(one, q.poll(LONG_DELAY_MS, MILLISECONDS)); |
1766 |
checkEmpty(q); |
1767 |
}}); |
1768 |
|
1769 |
executor.execute(new CheckedRunnable() { |
1770 |
public void realRun() throws InterruptedException { |
1771 |
threadsStarted.await(); |
1772 |
q.put(one); |
1773 |
}}); |
1774 |
} |
1775 |
} |
1776 |
|
1777 |
/** |
1778 |
* A deserialized/reserialized deque has same elements in same order |
1779 |
*/ |
1780 |
public void testSerialization() throws Exception { |
1781 |
Queue x = populatedDeque(SIZE); |
1782 |
Queue y = serialClone(x); |
1783 |
|
1784 |
assertNotSame(y, x); |
1785 |
assertEquals(x.size(), y.size()); |
1786 |
assertEquals(x.toString(), y.toString()); |
1787 |
assertTrue(Arrays.equals(x.toArray(), y.toArray())); |
1788 |
while (!x.isEmpty()) { |
1789 |
assertFalse(y.isEmpty()); |
1790 |
assertEquals(x.remove(), y.remove()); |
1791 |
} |
1792 |
assertTrue(y.isEmpty()); |
1793 |
} |
1794 |
|
1795 |
/** |
1796 |
* drainTo(c) empties deque into another collection c |
1797 |
*/ |
1798 |
public void testDrainTo() { |
1799 |
LinkedBlockingDeque q = populatedDeque(SIZE); |
1800 |
ArrayList l = new ArrayList(); |
1801 |
q.drainTo(l); |
1802 |
assertEquals(0, q.size()); |
1803 |
assertEquals(SIZE, l.size()); |
1804 |
for (int i = 0; i < SIZE; ++i) |
1805 |
assertEquals(l.get(i), new Integer(i)); |
1806 |
q.add(zero); |
1807 |
q.add(one); |
1808 |
assertFalse(q.isEmpty()); |
1809 |
assertTrue(q.contains(zero)); |
1810 |
assertTrue(q.contains(one)); |
1811 |
l.clear(); |
1812 |
q.drainTo(l); |
1813 |
assertEquals(0, q.size()); |
1814 |
assertEquals(2, l.size()); |
1815 |
for (int i = 0; i < 2; ++i) |
1816 |
assertEquals(l.get(i), new Integer(i)); |
1817 |
} |
1818 |
|
1819 |
/** |
1820 |
* drainTo empties full deque, unblocking a waiting put. |
1821 |
*/ |
1822 |
public void testDrainToWithActivePut() throws InterruptedException { |
1823 |
final LinkedBlockingDeque q = populatedDeque(SIZE); |
1824 |
Thread t = new Thread(new CheckedRunnable() { |
1825 |
public void realRun() throws InterruptedException { |
1826 |
q.put(new Integer(SIZE + 1)); |
1827 |
}}); |
1828 |
|
1829 |
t.start(); |
1830 |
ArrayList l = new ArrayList(); |
1831 |
q.drainTo(l); |
1832 |
assertTrue(l.size() >= SIZE); |
1833 |
for (int i = 0; i < SIZE; ++i) |
1834 |
assertEquals(l.get(i), new Integer(i)); |
1835 |
t.join(); |
1836 |
assertTrue(q.size() + l.size() >= SIZE); |
1837 |
} |
1838 |
|
1839 |
/** |
1840 |
* drainTo(c, n) empties first min(n, size) elements of queue into c |
1841 |
*/ |
1842 |
public void testDrainToN() { |
1843 |
LinkedBlockingDeque q = new LinkedBlockingDeque(); |
1844 |
for (int i = 0; i < SIZE + 2; ++i) { |
1845 |
for (int j = 0; j < SIZE; j++) |
1846 |
assertTrue(q.offer(new Integer(j))); |
1847 |
ArrayList l = new ArrayList(); |
1848 |
q.drainTo(l, i); |
1849 |
int k = (i < SIZE) ? i : SIZE; |
1850 |
assertEquals(k, l.size()); |
1851 |
assertEquals(SIZE - k, q.size()); |
1852 |
for (int j = 0; j < k; ++j) |
1853 |
assertEquals(l.get(j), new Integer(j)); |
1854 |
do {} while (q.poll() != null); |
1855 |
} |
1856 |
} |
1857 |
|
1858 |
/** |
1859 |
* remove(null), contains(null) always return false |
1860 |
*/ |
1861 |
public void testNeverContainsNull() { |
1862 |
Deque<?>[] qs = { |
1863 |
new LinkedBlockingDeque<Object>(), |
1864 |
populatedDeque(2), |
1865 |
}; |
1866 |
|
1867 |
for (Deque<?> q : qs) { |
1868 |
assertFalse(q.contains(null)); |
1869 |
assertFalse(q.remove(null)); |
1870 |
assertFalse(q.removeFirstOccurrence(null)); |
1871 |
assertFalse(q.removeLastOccurrence(null)); |
1872 |
} |
1873 |
} |
1874 |
|
1875 |
} |