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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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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 newTestSuite(LinkedBlockingDequeTest.class, |
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new Unbounded().testSuite(), |
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new Bounded().testSuite()); |
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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. |
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*/ |
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private 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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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()); |
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} |
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try { |
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q.removeLast(); |
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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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* 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(); |
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} catch (NoSuchElementException success) {} |
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} |
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|
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/** |
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* removeFirstOccurrence(x) removes x and returns true if present |
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*/ |
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public void testRemoveFirstOccurrence() { |
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LinkedBlockingDeque q = populatedDeque(SIZE); |
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for (int i = 1; i < SIZE; i+=2) { |
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assertTrue(q.removeFirstOccurrence(new Integer(i))); |
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} |
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for (int i = 0; i < SIZE; i+=2) { |
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assertTrue(q.removeFirstOccurrence(new Integer(i))); |
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assertFalse(q.removeFirstOccurrence(new Integer(i+1))); |
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} |
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assertTrue(q.isEmpty()); |
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} |
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|
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/** |
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* removeLastOccurrence(x) removes x and returns true if present |
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*/ |
292 |
public void testRemoveLastOccurrence() { |
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LinkedBlockingDeque q = populatedDeque(SIZE); |
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for (int i = 1; i < SIZE; i+=2) { |
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assertTrue(q.removeLastOccurrence(new Integer(i))); |
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} |
297 |
for (int i = 0; i < SIZE; i+=2) { |
298 |
assertTrue(q.removeLastOccurrence(new Integer(i))); |
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assertFalse(q.removeLastOccurrence(new Integer(i+1))); |
300 |
} |
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assertTrue(q.isEmpty()); |
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} |
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|
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/** |
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* peekFirst returns element inserted with addFirst |
306 |
*/ |
307 |
public void testAddFirst() { |
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LinkedBlockingDeque q = populatedDeque(3); |
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q.pollLast(); |
310 |
q.addFirst(four); |
311 |
assertSame(four, q.peekFirst()); |
312 |
} |
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|
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/** |
315 |
* peekLast returns element inserted with addLast |
316 |
*/ |
317 |
public void testAddLast() { |
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LinkedBlockingDeque q = populatedDeque(3); |
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q.pollLast(); |
320 |
q.addLast(four); |
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assertSame(four, q.peekLast()); |
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} |
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|
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/** |
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* A new deque has the indicated capacity, or Integer.MAX_VALUE if |
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* none given |
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*/ |
328 |
public void testConstructor1() { |
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assertEquals(SIZE, new LinkedBlockingDeque(SIZE).remainingCapacity()); |
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assertEquals(Integer.MAX_VALUE, new LinkedBlockingDeque().remainingCapacity()); |
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} |
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|
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/** |
334 |
* Constructor throws IllegalArgumentException if capacity argument nonpositive |
335 |
*/ |
336 |
public void testConstructor2() { |
337 |
try { |
338 |
new LinkedBlockingDeque(0); |
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shouldThrow(); |
340 |
} catch (IllegalArgumentException success) {} |
341 |
} |
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|
343 |
/** |
344 |
* Initializing from null Collection throws NullPointerException |
345 |
*/ |
346 |
public void testConstructor3() { |
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try { |
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new LinkedBlockingDeque(null); |
349 |
shouldThrow(); |
350 |
} catch (NullPointerException success) {} |
351 |
} |
352 |
|
353 |
/** |
354 |
* Initializing from Collection of null elements throws NullPointerException |
355 |
*/ |
356 |
public void testConstructor4() { |
357 |
Collection<Integer> elements = Arrays.asList(new Integer[SIZE]); |
358 |
try { |
359 |
new LinkedBlockingDeque(elements); |
360 |
shouldThrow(); |
361 |
} catch (NullPointerException success) {} |
362 |
} |
363 |
|
364 |
/** |
365 |
* Initializing from Collection with some null elements throws |
366 |
* NullPointerException |
367 |
*/ |
368 |
public void testConstructor5() { |
369 |
Integer[] ints = new Integer[SIZE]; |
370 |
for (int i = 0; i < SIZE-1; ++i) |
371 |
ints[i] = i; |
372 |
Collection<Integer> elements = Arrays.asList(ints); |
373 |
try { |
374 |
new LinkedBlockingDeque(elements); |
375 |
shouldThrow(); |
376 |
} catch (NullPointerException success) {} |
377 |
} |
378 |
|
379 |
/** |
380 |
* Deque contains all elements of collection used to initialize |
381 |
*/ |
382 |
public void testConstructor6() { |
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Integer[] ints = new Integer[SIZE]; |
384 |
for (int i = 0; i < SIZE; ++i) |
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ints[i] = i; |
386 |
LinkedBlockingDeque q = new LinkedBlockingDeque(Arrays.asList(ints)); |
387 |
for (int i = 0; i < SIZE; ++i) |
388 |
assertEquals(ints[i], q.poll()); |
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} |
390 |
|
391 |
/** |
392 |
* Deque transitions from empty to full when elements added |
393 |
*/ |
394 |
public void testEmptyFull() { |
395 |
LinkedBlockingDeque q = new LinkedBlockingDeque(2); |
396 |
assertTrue(q.isEmpty()); |
397 |
assertEquals("should have room for 2", 2, q.remainingCapacity()); |
398 |
q.add(one); |
399 |
assertFalse(q.isEmpty()); |
400 |
q.add(two); |
401 |
assertFalse(q.isEmpty()); |
402 |
assertEquals(0, q.remainingCapacity()); |
403 |
assertFalse(q.offer(three)); |
404 |
} |
405 |
|
406 |
/** |
407 |
* remainingCapacity decreases on add, increases on remove |
408 |
*/ |
409 |
public void testRemainingCapacity() { |
410 |
LinkedBlockingDeque q = populatedDeque(SIZE); |
411 |
for (int i = 0; i < SIZE; ++i) { |
412 |
assertEquals(i, q.remainingCapacity()); |
413 |
assertEquals(SIZE-i, q.size()); |
414 |
q.remove(); |
415 |
} |
416 |
for (int i = 0; i < SIZE; ++i) { |
417 |
assertEquals(SIZE-i, q.remainingCapacity()); |
418 |
assertEquals(i, q.size()); |
419 |
q.add(new Integer(i)); |
420 |
} |
421 |
} |
422 |
|
423 |
/** |
424 |
* push(null) throws NPE |
425 |
*/ |
426 |
public void testPushNull() { |
427 |
try { |
428 |
LinkedBlockingDeque q = new LinkedBlockingDeque(1); |
429 |
q.push(null); |
430 |
shouldThrow(); |
431 |
} catch (NullPointerException success) {} |
432 |
} |
433 |
|
434 |
/** |
435 |
* push succeeds if not full; throws ISE if full |
436 |
*/ |
437 |
public void testPush() { |
438 |
try { |
439 |
LinkedBlockingDeque q = new LinkedBlockingDeque(SIZE); |
440 |
for (int i = 0; i < SIZE; ++i) { |
441 |
Integer I = new Integer(i); |
442 |
q.push(I); |
443 |
assertEquals(I, q.peek()); |
444 |
} |
445 |
assertEquals(0, q.remainingCapacity()); |
446 |
q.push(new Integer(SIZE)); |
447 |
shouldThrow(); |
448 |
} catch (IllegalStateException success) {} |
449 |
} |
450 |
|
451 |
/** |
452 |
* peekFirst returns element inserted with push |
453 |
*/ |
454 |
public void testPushWithPeek() { |
455 |
LinkedBlockingDeque q = populatedDeque(3); |
456 |
q.pollLast(); |
457 |
q.push(four); |
458 |
assertSame(four, q.peekFirst()); |
459 |
} |
460 |
|
461 |
/** |
462 |
* pop removes next element, or throws NSEE if empty |
463 |
*/ |
464 |
public void testPop() { |
465 |
LinkedBlockingDeque q = populatedDeque(SIZE); |
466 |
for (int i = 0; i < SIZE; ++i) { |
467 |
assertEquals(i, q.pop()); |
468 |
} |
469 |
try { |
470 |
q.pop(); |
471 |
shouldThrow(); |
472 |
} catch (NoSuchElementException success) {} |
473 |
} |
474 |
|
475 |
/** |
476 |
* Offer succeeds if not full; fails if full |
477 |
*/ |
478 |
public void testOffer() { |
479 |
LinkedBlockingDeque q = new LinkedBlockingDeque(1); |
480 |
assertTrue(q.offer(zero)); |
481 |
assertFalse(q.offer(one)); |
482 |
} |
483 |
|
484 |
/** |
485 |
* add succeeds if not full; throws ISE if full |
486 |
*/ |
487 |
public void testAdd() { |
488 |
LinkedBlockingDeque q = new LinkedBlockingDeque(SIZE); |
489 |
for (int i = 0; i < SIZE; ++i) |
490 |
assertTrue(q.add(new Integer(i))); |
491 |
assertEquals(0, q.remainingCapacity()); |
492 |
try { |
493 |
q.add(new Integer(SIZE)); |
494 |
shouldThrow(); |
495 |
} catch (IllegalStateException success) {} |
496 |
} |
497 |
|
498 |
/** |
499 |
* addAll(this) throws IAE |
500 |
*/ |
501 |
public void testAddAllSelf() { |
502 |
LinkedBlockingDeque q = populatedDeque(SIZE); |
503 |
try { |
504 |
q.addAll(q); |
505 |
shouldThrow(); |
506 |
} catch (IllegalArgumentException success) {} |
507 |
} |
508 |
|
509 |
/** |
510 |
* addAll of a collection with any null elements throws NPE after |
511 |
* possibly adding some elements |
512 |
*/ |
513 |
public void testAddAll3() { |
514 |
LinkedBlockingDeque q = new LinkedBlockingDeque(SIZE); |
515 |
Integer[] ints = new Integer[SIZE]; |
516 |
for (int i = 0; i < SIZE-1; ++i) |
517 |
ints[i] = new Integer(i); |
518 |
Collection<Integer> elements = Arrays.asList(ints); |
519 |
try { |
520 |
q.addAll(elements); |
521 |
shouldThrow(); |
522 |
} catch (NullPointerException success) {} |
523 |
} |
524 |
|
525 |
/** |
526 |
* addAll throws IllegalStateException if not enough room |
527 |
*/ |
528 |
public void testAddAll4() { |
529 |
LinkedBlockingDeque q = new LinkedBlockingDeque(SIZE - 1); |
530 |
Integer[] ints = new Integer[SIZE]; |
531 |
for (int i = 0; i < SIZE; ++i) |
532 |
ints[i] = new Integer(i); |
533 |
Collection<Integer> elements = Arrays.asList(ints); |
534 |
try { |
535 |
q.addAll(elements); |
536 |
shouldThrow(); |
537 |
} catch (IllegalStateException success) {} |
538 |
} |
539 |
|
540 |
/** |
541 |
* Deque contains all elements, in traversal order, of successful addAll |
542 |
*/ |
543 |
public void testAddAll5() { |
544 |
Integer[] empty = new Integer[0]; |
545 |
Integer[] ints = new Integer[SIZE]; |
546 |
for (int i = 0; i < SIZE; ++i) |
547 |
ints[i] = new Integer(i); |
548 |
LinkedBlockingDeque q = new LinkedBlockingDeque(SIZE); |
549 |
assertFalse(q.addAll(Arrays.asList(empty))); |
550 |
assertTrue(q.addAll(Arrays.asList(ints))); |
551 |
for (int i = 0; i < SIZE; ++i) |
552 |
assertEquals(ints[i], q.poll()); |
553 |
} |
554 |
|
555 |
/** |
556 |
* all elements successfully put are contained |
557 |
*/ |
558 |
public void testPut() throws InterruptedException { |
559 |
LinkedBlockingDeque q = new LinkedBlockingDeque(SIZE); |
560 |
for (int i = 0; i < SIZE; ++i) { |
561 |
Integer I = new Integer(i); |
562 |
q.put(I); |
563 |
assertTrue(q.contains(I)); |
564 |
} |
565 |
assertEquals(0, q.remainingCapacity()); |
566 |
} |
567 |
|
568 |
/** |
569 |
* put blocks interruptibly if full |
570 |
*/ |
571 |
public void testBlockingPut() throws InterruptedException { |
572 |
final LinkedBlockingDeque q = new LinkedBlockingDeque(SIZE); |
573 |
final CountDownLatch pleaseInterrupt = new CountDownLatch(1); |
574 |
Thread t = newStartedThread(new CheckedRunnable() { |
575 |
public void realRun() throws InterruptedException { |
576 |
for (int i = 0; i < SIZE; ++i) |
577 |
q.put(i); |
578 |
assertEquals(SIZE, q.size()); |
579 |
assertEquals(0, q.remainingCapacity()); |
580 |
|
581 |
Thread.currentThread().interrupt(); |
582 |
try { |
583 |
q.put(99); |
584 |
shouldThrow(); |
585 |
} catch (InterruptedException success) {} |
586 |
assertFalse(Thread.interrupted()); |
587 |
|
588 |
pleaseInterrupt.countDown(); |
589 |
try { |
590 |
q.put(99); |
591 |
shouldThrow(); |
592 |
} catch (InterruptedException success) {} |
593 |
assertFalse(Thread.interrupted()); |
594 |
}}); |
595 |
|
596 |
await(pleaseInterrupt); |
597 |
assertThreadStaysAlive(t); |
598 |
t.interrupt(); |
599 |
awaitTermination(t); |
600 |
assertEquals(SIZE, q.size()); |
601 |
assertEquals(0, q.remainingCapacity()); |
602 |
} |
603 |
|
604 |
/** |
605 |
* put blocks interruptibly waiting for take when full |
606 |
*/ |
607 |
public void testPutWithTake() throws InterruptedException { |
608 |
final int capacity = 2; |
609 |
final LinkedBlockingDeque q = new LinkedBlockingDeque(capacity); |
610 |
final CountDownLatch pleaseTake = new CountDownLatch(1); |
611 |
final CountDownLatch pleaseInterrupt = new CountDownLatch(1); |
612 |
Thread t = newStartedThread(new CheckedRunnable() { |
613 |
public void realRun() throws InterruptedException { |
614 |
for (int i = 0; i < capacity; i++) |
615 |
q.put(i); |
616 |
pleaseTake.countDown(); |
617 |
q.put(86); |
618 |
|
619 |
pleaseInterrupt.countDown(); |
620 |
try { |
621 |
q.put(99); |
622 |
shouldThrow(); |
623 |
} catch (InterruptedException success) {} |
624 |
assertFalse(Thread.interrupted()); |
625 |
}}); |
626 |
|
627 |
await(pleaseTake); |
628 |
assertEquals(0, q.remainingCapacity()); |
629 |
assertEquals(0, q.take()); |
630 |
|
631 |
await(pleaseInterrupt); |
632 |
assertThreadStaysAlive(t); |
633 |
t.interrupt(); |
634 |
awaitTermination(t); |
635 |
assertEquals(0, q.remainingCapacity()); |
636 |
} |
637 |
|
638 |
/** |
639 |
* timed offer times out if full and elements not taken |
640 |
*/ |
641 |
public void testTimedOffer() throws InterruptedException { |
642 |
final LinkedBlockingDeque q = new LinkedBlockingDeque(2); |
643 |
final CountDownLatch pleaseInterrupt = new CountDownLatch(1); |
644 |
Thread t = newStartedThread(new CheckedRunnable() { |
645 |
public void realRun() throws InterruptedException { |
646 |
q.put(new Object()); |
647 |
q.put(new Object()); |
648 |
long startTime = System.nanoTime(); |
649 |
assertFalse(q.offer(new Object(), timeoutMillis(), MILLISECONDS)); |
650 |
assertTrue(millisElapsedSince(startTime) >= timeoutMillis()); |
651 |
pleaseInterrupt.countDown(); |
652 |
try { |
653 |
q.offer(new Object(), 2 * LONG_DELAY_MS, MILLISECONDS); |
654 |
shouldThrow(); |
655 |
} catch (InterruptedException success) {} |
656 |
}}); |
657 |
|
658 |
await(pleaseInterrupt); |
659 |
assertThreadStaysAlive(t); |
660 |
t.interrupt(); |
661 |
awaitTermination(t); |
662 |
} |
663 |
|
664 |
/** |
665 |
* take retrieves elements in FIFO order |
666 |
*/ |
667 |
public void testTake() throws InterruptedException { |
668 |
LinkedBlockingDeque q = populatedDeque(SIZE); |
669 |
for (int i = 0; i < SIZE; ++i) { |
670 |
assertEquals(i, q.take()); |
671 |
} |
672 |
} |
673 |
|
674 |
/** |
675 |
* take removes existing elements until empty, then blocks interruptibly |
676 |
*/ |
677 |
public void testBlockingTake() throws InterruptedException { |
678 |
final LinkedBlockingDeque q = populatedDeque(SIZE); |
679 |
final CountDownLatch pleaseInterrupt = new CountDownLatch(1); |
680 |
Thread t = newStartedThread(new CheckedRunnable() { |
681 |
public void realRun() throws InterruptedException { |
682 |
for (int i = 0; i < SIZE; ++i) { |
683 |
assertEquals(i, q.take()); |
684 |
} |
685 |
|
686 |
Thread.currentThread().interrupt(); |
687 |
try { |
688 |
q.take(); |
689 |
shouldThrow(); |
690 |
} catch (InterruptedException success) {} |
691 |
assertFalse(Thread.interrupted()); |
692 |
|
693 |
pleaseInterrupt.countDown(); |
694 |
try { |
695 |
q.take(); |
696 |
shouldThrow(); |
697 |
} catch (InterruptedException success) {} |
698 |
assertFalse(Thread.interrupted()); |
699 |
}}); |
700 |
|
701 |
await(pleaseInterrupt); |
702 |
assertThreadStaysAlive(t); |
703 |
t.interrupt(); |
704 |
awaitTermination(t); |
705 |
} |
706 |
|
707 |
/** |
708 |
* poll succeeds unless empty |
709 |
*/ |
710 |
public void testPoll() { |
711 |
LinkedBlockingDeque q = populatedDeque(SIZE); |
712 |
for (int i = 0; i < SIZE; ++i) { |
713 |
assertEquals(i, q.poll()); |
714 |
} |
715 |
assertNull(q.poll()); |
716 |
} |
717 |
|
718 |
/** |
719 |
* timed poll with zero timeout succeeds when non-empty, else times out |
720 |
*/ |
721 |
public void testTimedPoll0() throws InterruptedException { |
722 |
LinkedBlockingDeque q = populatedDeque(SIZE); |
723 |
for (int i = 0; i < SIZE; ++i) { |
724 |
assertEquals(i, q.poll(0, MILLISECONDS)); |
725 |
} |
726 |
assertNull(q.poll(0, MILLISECONDS)); |
727 |
} |
728 |
|
729 |
/** |
730 |
* timed poll with nonzero timeout succeeds when non-empty, else times out |
731 |
*/ |
732 |
public void testTimedPoll() throws InterruptedException { |
733 |
LinkedBlockingDeque q = populatedDeque(SIZE); |
734 |
for (int i = 0; i < SIZE; ++i) { |
735 |
long startTime = System.nanoTime(); |
736 |
assertEquals(i, q.poll(LONG_DELAY_MS, MILLISECONDS)); |
737 |
assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS); |
738 |
} |
739 |
long startTime = System.nanoTime(); |
740 |
assertNull(q.poll(timeoutMillis(), MILLISECONDS)); |
741 |
assertTrue(millisElapsedSince(startTime) >= timeoutMillis()); |
742 |
checkEmpty(q); |
743 |
} |
744 |
|
745 |
/** |
746 |
* Interrupted timed poll throws InterruptedException instead of |
747 |
* returning timeout status |
748 |
*/ |
749 |
public void testInterruptedTimedPoll() throws InterruptedException { |
750 |
final BlockingQueue<Integer> q = populatedDeque(SIZE); |
751 |
final CountDownLatch aboutToWait = new CountDownLatch(1); |
752 |
Thread t = newStartedThread(new CheckedRunnable() { |
753 |
public void realRun() throws InterruptedException { |
754 |
for (int i = 0; i < SIZE; ++i) { |
755 |
long t0 = System.nanoTime(); |
756 |
assertEquals(i, (int) q.poll(LONG_DELAY_MS, MILLISECONDS)); |
757 |
assertTrue(millisElapsedSince(t0) < SMALL_DELAY_MS); |
758 |
} |
759 |
long t0 = System.nanoTime(); |
760 |
aboutToWait.countDown(); |
761 |
try { |
762 |
q.poll(MEDIUM_DELAY_MS, MILLISECONDS); |
763 |
shouldThrow(); |
764 |
} catch (InterruptedException success) { |
765 |
assertTrue(millisElapsedSince(t0) < MEDIUM_DELAY_MS); |
766 |
} |
767 |
}}); |
768 |
|
769 |
aboutToWait.await(); |
770 |
waitForThreadToEnterWaitState(t, SMALL_DELAY_MS); |
771 |
t.interrupt(); |
772 |
awaitTermination(t, MEDIUM_DELAY_MS); |
773 |
checkEmpty(q); |
774 |
} |
775 |
|
776 |
/** |
777 |
* putFirst(null) throws NPE |
778 |
*/ |
779 |
public void testPutFirstNull() throws InterruptedException { |
780 |
LinkedBlockingDeque q = new LinkedBlockingDeque(SIZE); |
781 |
try { |
782 |
q.putFirst(null); |
783 |
shouldThrow(); |
784 |
} catch (NullPointerException success) {} |
785 |
} |
786 |
|
787 |
/** |
788 |
* all elements successfully putFirst are contained |
789 |
*/ |
790 |
public void testPutFirst() throws InterruptedException { |
791 |
LinkedBlockingDeque q = new LinkedBlockingDeque(SIZE); |
792 |
for (int i = 0; i < SIZE; ++i) { |
793 |
Integer I = new Integer(i); |
794 |
q.putFirst(I); |
795 |
assertTrue(q.contains(I)); |
796 |
} |
797 |
assertEquals(0, q.remainingCapacity()); |
798 |
} |
799 |
|
800 |
/** |
801 |
* putFirst blocks interruptibly if full |
802 |
*/ |
803 |
public void testBlockingPutFirst() throws InterruptedException { |
804 |
final LinkedBlockingDeque q = new LinkedBlockingDeque(SIZE); |
805 |
final CountDownLatch pleaseInterrupt = new CountDownLatch(1); |
806 |
Thread t = newStartedThread(new CheckedRunnable() { |
807 |
public void realRun() throws InterruptedException { |
808 |
for (int i = 0; i < SIZE; ++i) |
809 |
q.putFirst(i); |
810 |
assertEquals(SIZE, q.size()); |
811 |
assertEquals(0, q.remainingCapacity()); |
812 |
|
813 |
Thread.currentThread().interrupt(); |
814 |
try { |
815 |
q.putFirst(99); |
816 |
shouldThrow(); |
817 |
} catch (InterruptedException success) {} |
818 |
assertFalse(Thread.interrupted()); |
819 |
|
820 |
pleaseInterrupt.countDown(); |
821 |
try { |
822 |
q.putFirst(99); |
823 |
shouldThrow(); |
824 |
} catch (InterruptedException success) {} |
825 |
assertFalse(Thread.interrupted()); |
826 |
}}); |
827 |
|
828 |
await(pleaseInterrupt); |
829 |
assertThreadStaysAlive(t); |
830 |
t.interrupt(); |
831 |
awaitTermination(t); |
832 |
assertEquals(SIZE, q.size()); |
833 |
assertEquals(0, q.remainingCapacity()); |
834 |
} |
835 |
|
836 |
/** |
837 |
* putFirst blocks interruptibly waiting for take when full |
838 |
*/ |
839 |
public void testPutFirstWithTake() throws InterruptedException { |
840 |
final int capacity = 2; |
841 |
final LinkedBlockingDeque q = new LinkedBlockingDeque(capacity); |
842 |
final CountDownLatch pleaseTake = new CountDownLatch(1); |
843 |
final CountDownLatch pleaseInterrupt = new CountDownLatch(1); |
844 |
Thread t = newStartedThread(new CheckedRunnable() { |
845 |
public void realRun() throws InterruptedException { |
846 |
for (int i = 0; i < capacity; i++) |
847 |
q.putFirst(i); |
848 |
pleaseTake.countDown(); |
849 |
q.putFirst(86); |
850 |
|
851 |
pleaseInterrupt.countDown(); |
852 |
try { |
853 |
q.putFirst(99); |
854 |
shouldThrow(); |
855 |
} catch (InterruptedException success) {} |
856 |
assertFalse(Thread.interrupted()); |
857 |
}}); |
858 |
|
859 |
await(pleaseTake); |
860 |
assertEquals(0, q.remainingCapacity()); |
861 |
assertEquals(capacity - 1, q.take()); |
862 |
|
863 |
await(pleaseInterrupt); |
864 |
assertThreadStaysAlive(t); |
865 |
t.interrupt(); |
866 |
awaitTermination(t); |
867 |
assertEquals(0, q.remainingCapacity()); |
868 |
} |
869 |
|
870 |
/** |
871 |
* timed offerFirst times out if full and elements not taken |
872 |
*/ |
873 |
public void testTimedOfferFirst() throws InterruptedException { |
874 |
final LinkedBlockingDeque q = new LinkedBlockingDeque(2); |
875 |
final CountDownLatch pleaseInterrupt = new CountDownLatch(1); |
876 |
Thread t = newStartedThread(new CheckedRunnable() { |
877 |
public void realRun() throws InterruptedException { |
878 |
q.putFirst(new Object()); |
879 |
q.putFirst(new Object()); |
880 |
long startTime = System.nanoTime(); |
881 |
assertFalse(q.offerFirst(new Object(), timeoutMillis(), MILLISECONDS)); |
882 |
assertTrue(millisElapsedSince(startTime) >= timeoutMillis()); |
883 |
pleaseInterrupt.countDown(); |
884 |
try { |
885 |
q.offerFirst(new Object(), 2 * LONG_DELAY_MS, MILLISECONDS); |
886 |
shouldThrow(); |
887 |
} catch (InterruptedException success) {} |
888 |
}}); |
889 |
|
890 |
await(pleaseInterrupt); |
891 |
assertThreadStaysAlive(t); |
892 |
t.interrupt(); |
893 |
awaitTermination(t); |
894 |
} |
895 |
|
896 |
/** |
897 |
* take retrieves elements in FIFO order |
898 |
*/ |
899 |
public void testTakeFirst() throws InterruptedException { |
900 |
LinkedBlockingDeque q = populatedDeque(SIZE); |
901 |
for (int i = 0; i < SIZE; ++i) { |
902 |
assertEquals(i, q.takeFirst()); |
903 |
} |
904 |
} |
905 |
|
906 |
/** |
907 |
* takeFirst() blocks interruptibly when empty |
908 |
*/ |
909 |
public void testTakeFirstFromEmptyBlocksInterruptibly() { |
910 |
final BlockingDeque q = new LinkedBlockingDeque(); |
911 |
final CountDownLatch threadStarted = new CountDownLatch(1); |
912 |
Thread t = newStartedThread(new CheckedRunnable() { |
913 |
public void realRun() { |
914 |
threadStarted.countDown(); |
915 |
try { |
916 |
q.takeFirst(); |
917 |
shouldThrow(); |
918 |
} catch (InterruptedException success) {} |
919 |
assertFalse(Thread.interrupted()); |
920 |
}}); |
921 |
|
922 |
await(threadStarted); |
923 |
assertThreadStaysAlive(t); |
924 |
t.interrupt(); |
925 |
awaitTermination(t); |
926 |
} |
927 |
|
928 |
/** |
929 |
* takeFirst() throws InterruptedException immediately if interrupted |
930 |
* before waiting |
931 |
*/ |
932 |
public void testTakeFirstFromEmptyAfterInterrupt() { |
933 |
final BlockingDeque q = new LinkedBlockingDeque(); |
934 |
Thread t = newStartedThread(new CheckedRunnable() { |
935 |
public void realRun() { |
936 |
Thread.currentThread().interrupt(); |
937 |
try { |
938 |
q.takeFirst(); |
939 |
shouldThrow(); |
940 |
} catch (InterruptedException success) {} |
941 |
assertFalse(Thread.interrupted()); |
942 |
}}); |
943 |
|
944 |
awaitTermination(t); |
945 |
} |
946 |
|
947 |
/** |
948 |
* takeLast() blocks interruptibly when empty |
949 |
*/ |
950 |
public void testTakeLastFromEmptyBlocksInterruptibly() { |
951 |
final BlockingDeque q = new LinkedBlockingDeque(); |
952 |
final CountDownLatch threadStarted = new CountDownLatch(1); |
953 |
Thread t = newStartedThread(new CheckedRunnable() { |
954 |
public void realRun() { |
955 |
threadStarted.countDown(); |
956 |
try { |
957 |
q.takeLast(); |
958 |
shouldThrow(); |
959 |
} catch (InterruptedException success) {} |
960 |
assertFalse(Thread.interrupted()); |
961 |
}}); |
962 |
|
963 |
await(threadStarted); |
964 |
assertThreadStaysAlive(t); |
965 |
t.interrupt(); |
966 |
awaitTermination(t); |
967 |
} |
968 |
|
969 |
/** |
970 |
* takeLast() throws InterruptedException immediately if interrupted |
971 |
* before waiting |
972 |
*/ |
973 |
public void testTakeLastFromEmptyAfterInterrupt() { |
974 |
final BlockingDeque q = new LinkedBlockingDeque(); |
975 |
Thread t = newStartedThread(new CheckedRunnable() { |
976 |
public void realRun() { |
977 |
Thread.currentThread().interrupt(); |
978 |
try { |
979 |
q.takeLast(); |
980 |
shouldThrow(); |
981 |
} catch (InterruptedException success) {} |
982 |
assertFalse(Thread.interrupted()); |
983 |
}}); |
984 |
|
985 |
awaitTermination(t); |
986 |
} |
987 |
|
988 |
/** |
989 |
* takeFirst removes existing elements until empty, then blocks interruptibly |
990 |
*/ |
991 |
public void testBlockingTakeFirst() throws InterruptedException { |
992 |
final LinkedBlockingDeque q = populatedDeque(SIZE); |
993 |
final CountDownLatch pleaseInterrupt = new CountDownLatch(1); |
994 |
Thread t = newStartedThread(new CheckedRunnable() { |
995 |
public void realRun() throws InterruptedException { |
996 |
for (int i = 0; i < SIZE; ++i) { |
997 |
assertEquals(i, q.takeFirst()); |
998 |
} |
999 |
|
1000 |
Thread.currentThread().interrupt(); |
1001 |
try { |
1002 |
q.takeFirst(); |
1003 |
shouldThrow(); |
1004 |
} catch (InterruptedException success) {} |
1005 |
assertFalse(Thread.interrupted()); |
1006 |
|
1007 |
pleaseInterrupt.countDown(); |
1008 |
try { |
1009 |
q.takeFirst(); |
1010 |
shouldThrow(); |
1011 |
} catch (InterruptedException success) {} |
1012 |
assertFalse(Thread.interrupted()); |
1013 |
}}); |
1014 |
|
1015 |
await(pleaseInterrupt); |
1016 |
assertThreadStaysAlive(t); |
1017 |
t.interrupt(); |
1018 |
awaitTermination(t); |
1019 |
} |
1020 |
|
1021 |
/** |
1022 |
* timed pollFirst with zero timeout succeeds when non-empty, else times out |
1023 |
*/ |
1024 |
public void testTimedPollFirst0() throws InterruptedException { |
1025 |
LinkedBlockingDeque q = populatedDeque(SIZE); |
1026 |
for (int i = 0; i < SIZE; ++i) { |
1027 |
assertEquals(i, q.pollFirst(0, MILLISECONDS)); |
1028 |
} |
1029 |
assertNull(q.pollFirst(0, MILLISECONDS)); |
1030 |
} |
1031 |
|
1032 |
/** |
1033 |
* timed pollFirst with nonzero timeout succeeds when non-empty, else times out |
1034 |
*/ |
1035 |
public void testTimedPollFirst() throws InterruptedException { |
1036 |
LinkedBlockingDeque q = populatedDeque(SIZE); |
1037 |
for (int i = 0; i < SIZE; ++i) { |
1038 |
long startTime = System.nanoTime(); |
1039 |
assertEquals(i, q.pollFirst(LONG_DELAY_MS, MILLISECONDS)); |
1040 |
assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS); |
1041 |
} |
1042 |
long startTime = System.nanoTime(); |
1043 |
assertNull(q.pollFirst(timeoutMillis(), MILLISECONDS)); |
1044 |
assertTrue(millisElapsedSince(startTime) >= timeoutMillis()); |
1045 |
checkEmpty(q); |
1046 |
} |
1047 |
|
1048 |
/** |
1049 |
* Interrupted timed pollFirst throws InterruptedException instead of |
1050 |
* returning timeout status |
1051 |
*/ |
1052 |
public void testInterruptedTimedPollFirst() throws InterruptedException { |
1053 |
final CountDownLatch pleaseInterrupt = new CountDownLatch(1); |
1054 |
Thread t = newStartedThread(new CheckedRunnable() { |
1055 |
public void realRun() throws InterruptedException { |
1056 |
LinkedBlockingDeque q = populatedDeque(SIZE); |
1057 |
for (int i = 0; i < SIZE; ++i) { |
1058 |
assertEquals(i, q.pollFirst(LONG_DELAY_MS, MILLISECONDS)); |
1059 |
} |
1060 |
|
1061 |
Thread.currentThread().interrupt(); |
1062 |
try { |
1063 |
q.pollFirst(SMALL_DELAY_MS, MILLISECONDS); |
1064 |
shouldThrow(); |
1065 |
} catch (InterruptedException success) {} |
1066 |
assertFalse(Thread.interrupted()); |
1067 |
|
1068 |
pleaseInterrupt.countDown(); |
1069 |
try { |
1070 |
q.pollFirst(LONG_DELAY_MS, MILLISECONDS); |
1071 |
shouldThrow(); |
1072 |
} catch (InterruptedException success) {} |
1073 |
assertFalse(Thread.interrupted()); |
1074 |
}}); |
1075 |
|
1076 |
await(pleaseInterrupt); |
1077 |
assertThreadStaysAlive(t); |
1078 |
t.interrupt(); |
1079 |
awaitTermination(t); |
1080 |
} |
1081 |
|
1082 |
/** |
1083 |
* timed pollFirst before a delayed offerFirst fails; after offerFirst succeeds; |
1084 |
* on interruption throws |
1085 |
*/ |
1086 |
public void testTimedPollFirstWithOfferFirst() throws InterruptedException { |
1087 |
final LinkedBlockingDeque q = new LinkedBlockingDeque(2); |
1088 |
final CheckedBarrier barrier = new CheckedBarrier(2); |
1089 |
Thread t = newStartedThread(new CheckedRunnable() { |
1090 |
public void realRun() throws InterruptedException { |
1091 |
long startTime = System.nanoTime(); |
1092 |
assertNull(q.pollFirst(timeoutMillis(), MILLISECONDS)); |
1093 |
assertTrue(millisElapsedSince(startTime) >= timeoutMillis()); |
1094 |
|
1095 |
barrier.await(); |
1096 |
|
1097 |
assertSame(zero, q.pollFirst(LONG_DELAY_MS, MILLISECONDS)); |
1098 |
|
1099 |
Thread.currentThread().interrupt(); |
1100 |
try { |
1101 |
q.pollFirst(LONG_DELAY_MS, MILLISECONDS); |
1102 |
shouldThrow(); |
1103 |
} catch (InterruptedException success) {} |
1104 |
|
1105 |
barrier.await(); |
1106 |
try { |
1107 |
q.pollFirst(LONG_DELAY_MS, MILLISECONDS); |
1108 |
shouldThrow(); |
1109 |
} catch (InterruptedException success) {} |
1110 |
assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS); |
1111 |
}}); |
1112 |
|
1113 |
barrier.await(); |
1114 |
long startTime = System.nanoTime(); |
1115 |
assertTrue(q.offerFirst(zero, LONG_DELAY_MS, MILLISECONDS)); |
1116 |
assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS); |
1117 |
barrier.await(); |
1118 |
assertThreadStaysAlive(t); |
1119 |
t.interrupt(); |
1120 |
awaitTermination(t); |
1121 |
} |
1122 |
|
1123 |
/** |
1124 |
* putLast(null) throws NPE |
1125 |
*/ |
1126 |
public void testPutLastNull() throws InterruptedException { |
1127 |
LinkedBlockingDeque q = new LinkedBlockingDeque(SIZE); |
1128 |
try { |
1129 |
q.putLast(null); |
1130 |
shouldThrow(); |
1131 |
} catch (NullPointerException success) {} |
1132 |
} |
1133 |
|
1134 |
/** |
1135 |
* all elements successfully putLast are contained |
1136 |
*/ |
1137 |
public void testPutLast() throws InterruptedException { |
1138 |
LinkedBlockingDeque q = new LinkedBlockingDeque(SIZE); |
1139 |
for (int i = 0; i < SIZE; ++i) { |
1140 |
Integer I = new Integer(i); |
1141 |
q.putLast(I); |
1142 |
assertTrue(q.contains(I)); |
1143 |
} |
1144 |
assertEquals(0, q.remainingCapacity()); |
1145 |
} |
1146 |
|
1147 |
/** |
1148 |
* putLast blocks interruptibly if full |
1149 |
*/ |
1150 |
public void testBlockingPutLast() throws InterruptedException { |
1151 |
final LinkedBlockingDeque q = new LinkedBlockingDeque(SIZE); |
1152 |
final CountDownLatch pleaseInterrupt = new CountDownLatch(1); |
1153 |
Thread t = newStartedThread(new CheckedRunnable() { |
1154 |
public void realRun() throws InterruptedException { |
1155 |
for (int i = 0; i < SIZE; ++i) |
1156 |
q.putLast(i); |
1157 |
assertEquals(SIZE, q.size()); |
1158 |
assertEquals(0, q.remainingCapacity()); |
1159 |
|
1160 |
Thread.currentThread().interrupt(); |
1161 |
try { |
1162 |
q.putLast(99); |
1163 |
shouldThrow(); |
1164 |
} catch (InterruptedException success) {} |
1165 |
assertFalse(Thread.interrupted()); |
1166 |
|
1167 |
pleaseInterrupt.countDown(); |
1168 |
try { |
1169 |
q.putLast(99); |
1170 |
shouldThrow(); |
1171 |
} catch (InterruptedException success) {} |
1172 |
assertFalse(Thread.interrupted()); |
1173 |
}}); |
1174 |
|
1175 |
await(pleaseInterrupt); |
1176 |
assertThreadStaysAlive(t); |
1177 |
t.interrupt(); |
1178 |
awaitTermination(t); |
1179 |
assertEquals(SIZE, q.size()); |
1180 |
assertEquals(0, q.remainingCapacity()); |
1181 |
} |
1182 |
|
1183 |
/** |
1184 |
* putLast blocks interruptibly waiting for take when full |
1185 |
*/ |
1186 |
public void testPutLastWithTake() throws InterruptedException { |
1187 |
final int capacity = 2; |
1188 |
final LinkedBlockingDeque q = new LinkedBlockingDeque(capacity); |
1189 |
final CountDownLatch pleaseTake = new CountDownLatch(1); |
1190 |
final CountDownLatch pleaseInterrupt = new CountDownLatch(1); |
1191 |
Thread t = newStartedThread(new CheckedRunnable() { |
1192 |
public void realRun() throws InterruptedException { |
1193 |
for (int i = 0; i < capacity; i++) |
1194 |
q.putLast(i); |
1195 |
pleaseTake.countDown(); |
1196 |
q.putLast(86); |
1197 |
|
1198 |
pleaseInterrupt.countDown(); |
1199 |
try { |
1200 |
q.putLast(99); |
1201 |
shouldThrow(); |
1202 |
} catch (InterruptedException success) {} |
1203 |
assertFalse(Thread.interrupted()); |
1204 |
}}); |
1205 |
|
1206 |
await(pleaseTake); |
1207 |
assertEquals(0, q.remainingCapacity()); |
1208 |
assertEquals(0, q.take()); |
1209 |
|
1210 |
await(pleaseInterrupt); |
1211 |
assertThreadStaysAlive(t); |
1212 |
t.interrupt(); |
1213 |
awaitTermination(t); |
1214 |
assertEquals(0, q.remainingCapacity()); |
1215 |
} |
1216 |
|
1217 |
/** |
1218 |
* timed offerLast times out if full and elements not taken |
1219 |
*/ |
1220 |
public void testTimedOfferLast() throws InterruptedException { |
1221 |
final LinkedBlockingDeque q = new LinkedBlockingDeque(2); |
1222 |
final CountDownLatch pleaseInterrupt = new CountDownLatch(1); |
1223 |
Thread t = newStartedThread(new CheckedRunnable() { |
1224 |
public void realRun() throws InterruptedException { |
1225 |
q.putLast(new Object()); |
1226 |
q.putLast(new Object()); |
1227 |
long startTime = System.nanoTime(); |
1228 |
assertFalse(q.offerLast(new Object(), timeoutMillis(), MILLISECONDS)); |
1229 |
assertTrue(millisElapsedSince(startTime) >= timeoutMillis()); |
1230 |
pleaseInterrupt.countDown(); |
1231 |
try { |
1232 |
q.offerLast(new Object(), 2 * LONG_DELAY_MS, MILLISECONDS); |
1233 |
shouldThrow(); |
1234 |
} catch (InterruptedException success) {} |
1235 |
}}); |
1236 |
|
1237 |
await(pleaseInterrupt); |
1238 |
assertThreadStaysAlive(t); |
1239 |
t.interrupt(); |
1240 |
awaitTermination(t); |
1241 |
} |
1242 |
|
1243 |
/** |
1244 |
* takeLast retrieves elements in FIFO order |
1245 |
*/ |
1246 |
public void testTakeLast() throws InterruptedException { |
1247 |
LinkedBlockingDeque q = populatedDeque(SIZE); |
1248 |
for (int i = 0; i < SIZE; ++i) { |
1249 |
assertEquals(SIZE-i-1, q.takeLast()); |
1250 |
} |
1251 |
} |
1252 |
|
1253 |
/** |
1254 |
* takeLast removes existing elements until empty, then blocks interruptibly |
1255 |
*/ |
1256 |
public void testBlockingTakeLast() throws InterruptedException { |
1257 |
final LinkedBlockingDeque q = populatedDeque(SIZE); |
1258 |
final CountDownLatch pleaseInterrupt = new CountDownLatch(1); |
1259 |
Thread t = newStartedThread(new CheckedRunnable() { |
1260 |
public void realRun() throws InterruptedException { |
1261 |
for (int i = 0; i < SIZE; ++i) { |
1262 |
assertEquals(SIZE-i-1, q.takeLast()); |
1263 |
} |
1264 |
|
1265 |
Thread.currentThread().interrupt(); |
1266 |
try { |
1267 |
q.takeLast(); |
1268 |
shouldThrow(); |
1269 |
} catch (InterruptedException success) {} |
1270 |
assertFalse(Thread.interrupted()); |
1271 |
|
1272 |
pleaseInterrupt.countDown(); |
1273 |
try { |
1274 |
q.takeLast(); |
1275 |
shouldThrow(); |
1276 |
} catch (InterruptedException success) {} |
1277 |
assertFalse(Thread.interrupted()); |
1278 |
}}); |
1279 |
|
1280 |
await(pleaseInterrupt); |
1281 |
assertThreadStaysAlive(t); |
1282 |
t.interrupt(); |
1283 |
awaitTermination(t); |
1284 |
} |
1285 |
|
1286 |
/** |
1287 |
* timed pollLast with zero timeout succeeds when non-empty, else times out |
1288 |
*/ |
1289 |
public void testTimedPollLast0() throws InterruptedException { |
1290 |
LinkedBlockingDeque q = populatedDeque(SIZE); |
1291 |
for (int i = 0; i < SIZE; ++i) { |
1292 |
assertEquals(SIZE-i-1, q.pollLast(0, MILLISECONDS)); |
1293 |
} |
1294 |
assertNull(q.pollLast(0, MILLISECONDS)); |
1295 |
} |
1296 |
|
1297 |
/** |
1298 |
* timed pollLast with nonzero timeout succeeds when non-empty, else times out |
1299 |
*/ |
1300 |
public void testTimedPollLast() throws InterruptedException { |
1301 |
LinkedBlockingDeque q = populatedDeque(SIZE); |
1302 |
for (int i = 0; i < SIZE; ++i) { |
1303 |
long startTime = System.nanoTime(); |
1304 |
assertEquals(SIZE-i-1, q.pollLast(LONG_DELAY_MS, MILLISECONDS)); |
1305 |
assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS); |
1306 |
} |
1307 |
long startTime = System.nanoTime(); |
1308 |
assertNull(q.pollLast(timeoutMillis(), MILLISECONDS)); |
1309 |
assertTrue(millisElapsedSince(startTime) >= timeoutMillis()); |
1310 |
checkEmpty(q); |
1311 |
} |
1312 |
|
1313 |
/** |
1314 |
* Interrupted timed pollLast throws InterruptedException instead of |
1315 |
* returning timeout status |
1316 |
*/ |
1317 |
public void testInterruptedTimedPollLast() throws InterruptedException { |
1318 |
final CountDownLatch pleaseInterrupt = new CountDownLatch(1); |
1319 |
Thread t = newStartedThread(new CheckedRunnable() { |
1320 |
public void realRun() throws InterruptedException { |
1321 |
LinkedBlockingDeque q = populatedDeque(SIZE); |
1322 |
for (int i = 0; i < SIZE; ++i) { |
1323 |
assertEquals(SIZE-i-1, q.pollLast(LONG_DELAY_MS, MILLISECONDS)); |
1324 |
} |
1325 |
|
1326 |
Thread.currentThread().interrupt(); |
1327 |
try { |
1328 |
q.pollLast(LONG_DELAY_MS, MILLISECONDS); |
1329 |
shouldThrow(); |
1330 |
} catch (InterruptedException success) {} |
1331 |
assertFalse(Thread.interrupted()); |
1332 |
|
1333 |
pleaseInterrupt.countDown(); |
1334 |
try { |
1335 |
q.pollLast(LONG_DELAY_MS, MILLISECONDS); |
1336 |
shouldThrow(); |
1337 |
} catch (InterruptedException success) {} |
1338 |
assertFalse(Thread.interrupted()); |
1339 |
}}); |
1340 |
|
1341 |
await(pleaseInterrupt); |
1342 |
assertThreadStaysAlive(t); |
1343 |
t.interrupt(); |
1344 |
awaitTermination(t); |
1345 |
} |
1346 |
|
1347 |
/** |
1348 |
* timed poll before a delayed offerLast fails; after offerLast succeeds; |
1349 |
* on interruption throws |
1350 |
*/ |
1351 |
public void testTimedPollWithOfferLast() throws InterruptedException { |
1352 |
final LinkedBlockingDeque q = new LinkedBlockingDeque(2); |
1353 |
final CheckedBarrier barrier = new CheckedBarrier(2); |
1354 |
Thread t = newStartedThread(new CheckedRunnable() { |
1355 |
public void realRun() throws InterruptedException { |
1356 |
long startTime = System.nanoTime(); |
1357 |
assertNull(q.poll(timeoutMillis(), MILLISECONDS)); |
1358 |
assertTrue(millisElapsedSince(startTime) >= timeoutMillis()); |
1359 |
|
1360 |
barrier.await(); |
1361 |
|
1362 |
assertSame(zero, q.poll(LONG_DELAY_MS, MILLISECONDS)); |
1363 |
|
1364 |
Thread.currentThread().interrupt(); |
1365 |
try { |
1366 |
q.poll(LONG_DELAY_MS, MILLISECONDS); |
1367 |
shouldThrow(); |
1368 |
} catch (InterruptedException success) {} |
1369 |
assertFalse(Thread.interrupted()); |
1370 |
|
1371 |
barrier.await(); |
1372 |
try { |
1373 |
q.poll(LONG_DELAY_MS, MILLISECONDS); |
1374 |
shouldThrow(); |
1375 |
} catch (InterruptedException success) {} |
1376 |
assertFalse(Thread.interrupted()); |
1377 |
}}); |
1378 |
|
1379 |
barrier.await(); |
1380 |
long startTime = System.nanoTime(); |
1381 |
assertTrue(q.offerLast(zero, LONG_DELAY_MS, MILLISECONDS)); |
1382 |
assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS); |
1383 |
|
1384 |
barrier.await(); |
1385 |
assertThreadStaysAlive(t); |
1386 |
t.interrupt(); |
1387 |
awaitTermination(t); |
1388 |
} |
1389 |
|
1390 |
/** |
1391 |
* element returns next element, or throws NSEE if empty |
1392 |
*/ |
1393 |
public void testElement() { |
1394 |
LinkedBlockingDeque q = populatedDeque(SIZE); |
1395 |
for (int i = 0; i < SIZE; ++i) { |
1396 |
assertEquals(i, q.element()); |
1397 |
q.poll(); |
1398 |
} |
1399 |
try { |
1400 |
q.element(); |
1401 |
shouldThrow(); |
1402 |
} catch (NoSuchElementException success) {} |
1403 |
} |
1404 |
|
1405 |
/** |
1406 |
* contains(x) reports true when elements added but not yet removed |
1407 |
*/ |
1408 |
public void testContains() { |
1409 |
LinkedBlockingDeque q = populatedDeque(SIZE); |
1410 |
for (int i = 0; i < SIZE; ++i) { |
1411 |
assertTrue(q.contains(new Integer(i))); |
1412 |
q.poll(); |
1413 |
assertFalse(q.contains(new Integer(i))); |
1414 |
} |
1415 |
} |
1416 |
|
1417 |
/** |
1418 |
* clear removes all elements |
1419 |
*/ |
1420 |
public void testClear() { |
1421 |
LinkedBlockingDeque q = populatedDeque(SIZE); |
1422 |
q.clear(); |
1423 |
assertTrue(q.isEmpty()); |
1424 |
assertEquals(0, q.size()); |
1425 |
assertEquals(SIZE, q.remainingCapacity()); |
1426 |
q.add(one); |
1427 |
assertFalse(q.isEmpty()); |
1428 |
assertTrue(q.contains(one)); |
1429 |
q.clear(); |
1430 |
assertTrue(q.isEmpty()); |
1431 |
} |
1432 |
|
1433 |
/** |
1434 |
* containsAll(c) is true when c contains a subset of elements |
1435 |
*/ |
1436 |
public void testContainsAll() { |
1437 |
LinkedBlockingDeque q = populatedDeque(SIZE); |
1438 |
LinkedBlockingDeque p = new LinkedBlockingDeque(SIZE); |
1439 |
for (int i = 0; i < SIZE; ++i) { |
1440 |
assertTrue(q.containsAll(p)); |
1441 |
assertFalse(p.containsAll(q)); |
1442 |
p.add(new Integer(i)); |
1443 |
} |
1444 |
assertTrue(p.containsAll(q)); |
1445 |
} |
1446 |
|
1447 |
/** |
1448 |
* retainAll(c) retains only those elements of c and reports true if changed |
1449 |
*/ |
1450 |
public void testRetainAll() { |
1451 |
LinkedBlockingDeque q = populatedDeque(SIZE); |
1452 |
LinkedBlockingDeque p = populatedDeque(SIZE); |
1453 |
for (int i = 0; i < SIZE; ++i) { |
1454 |
boolean changed = q.retainAll(p); |
1455 |
if (i == 0) |
1456 |
assertFalse(changed); |
1457 |
else |
1458 |
assertTrue(changed); |
1459 |
|
1460 |
assertTrue(q.containsAll(p)); |
1461 |
assertEquals(SIZE-i, q.size()); |
1462 |
p.remove(); |
1463 |
} |
1464 |
} |
1465 |
|
1466 |
/** |
1467 |
* removeAll(c) removes only those elements of c and reports true if changed |
1468 |
*/ |
1469 |
public void testRemoveAll() { |
1470 |
for (int i = 1; i < SIZE; ++i) { |
1471 |
LinkedBlockingDeque q = populatedDeque(SIZE); |
1472 |
LinkedBlockingDeque p = populatedDeque(i); |
1473 |
assertTrue(q.removeAll(p)); |
1474 |
assertEquals(SIZE-i, q.size()); |
1475 |
for (int j = 0; j < i; ++j) { |
1476 |
Integer I = (Integer)(p.remove()); |
1477 |
assertFalse(q.contains(I)); |
1478 |
} |
1479 |
} |
1480 |
} |
1481 |
|
1482 |
/** |
1483 |
* toArray contains all elements in FIFO order |
1484 |
*/ |
1485 |
public void testToArray() throws InterruptedException { |
1486 |
LinkedBlockingDeque q = populatedDeque(SIZE); |
1487 |
Object[] o = q.toArray(); |
1488 |
for (int i = 0; i < o.length; i++) |
1489 |
assertSame(o[i], q.poll()); |
1490 |
} |
1491 |
|
1492 |
/** |
1493 |
* toArray(a) contains all elements in FIFO order |
1494 |
*/ |
1495 |
public void testToArray2() { |
1496 |
LinkedBlockingDeque<Integer> q = populatedDeque(SIZE); |
1497 |
Integer[] ints = new Integer[SIZE]; |
1498 |
Integer[] array = q.toArray(ints); |
1499 |
assertSame(ints, array); |
1500 |
for (int i = 0; i < ints.length; i++) |
1501 |
assertSame(ints[i], q.remove()); |
1502 |
} |
1503 |
|
1504 |
/** |
1505 |
* toArray(incompatible array type) throws ArrayStoreException |
1506 |
*/ |
1507 |
public void testToArray1_BadArg() { |
1508 |
LinkedBlockingDeque q = populatedDeque(SIZE); |
1509 |
try { |
1510 |
q.toArray(new String[10]); |
1511 |
shouldThrow(); |
1512 |
} catch (ArrayStoreException success) {} |
1513 |
} |
1514 |
|
1515 |
/** |
1516 |
* iterator iterates through all elements |
1517 |
*/ |
1518 |
public void testIterator() throws InterruptedException { |
1519 |
LinkedBlockingDeque q = populatedDeque(SIZE); |
1520 |
Iterator it = q.iterator(); |
1521 |
while (it.hasNext()) { |
1522 |
assertEquals(it.next(), q.take()); |
1523 |
} |
1524 |
} |
1525 |
|
1526 |
/** |
1527 |
* iterator.remove removes current element |
1528 |
*/ |
1529 |
public void testIteratorRemove() { |
1530 |
final LinkedBlockingDeque q = new LinkedBlockingDeque(3); |
1531 |
q.add(two); |
1532 |
q.add(one); |
1533 |
q.add(three); |
1534 |
|
1535 |
Iterator it = q.iterator(); |
1536 |
it.next(); |
1537 |
it.remove(); |
1538 |
|
1539 |
it = q.iterator(); |
1540 |
assertSame(it.next(), one); |
1541 |
assertSame(it.next(), three); |
1542 |
assertFalse(it.hasNext()); |
1543 |
} |
1544 |
|
1545 |
/** |
1546 |
* iterator ordering is FIFO |
1547 |
*/ |
1548 |
public void testIteratorOrdering() { |
1549 |
final LinkedBlockingDeque q = new LinkedBlockingDeque(3); |
1550 |
q.add(one); |
1551 |
q.add(two); |
1552 |
q.add(three); |
1553 |
assertEquals(0, q.remainingCapacity()); |
1554 |
int k = 0; |
1555 |
for (Iterator it = q.iterator(); it.hasNext();) { |
1556 |
assertEquals(++k, it.next()); |
1557 |
} |
1558 |
assertEquals(3, k); |
1559 |
} |
1560 |
|
1561 |
/** |
1562 |
* Modifications do not cause iterators to fail |
1563 |
*/ |
1564 |
public void testWeaklyConsistentIteration() { |
1565 |
final LinkedBlockingDeque q = new LinkedBlockingDeque(3); |
1566 |
q.add(one); |
1567 |
q.add(two); |
1568 |
q.add(three); |
1569 |
for (Iterator it = q.iterator(); it.hasNext();) { |
1570 |
q.remove(); |
1571 |
it.next(); |
1572 |
} |
1573 |
assertEquals(0, q.size()); |
1574 |
} |
1575 |
|
1576 |
/** |
1577 |
* Descending iterator iterates through all elements |
1578 |
*/ |
1579 |
public void testDescendingIterator() { |
1580 |
LinkedBlockingDeque q = populatedDeque(SIZE); |
1581 |
int i = 0; |
1582 |
Iterator it = q.descendingIterator(); |
1583 |
while (it.hasNext()) { |
1584 |
assertTrue(q.contains(it.next())); |
1585 |
++i; |
1586 |
} |
1587 |
assertEquals(i, SIZE); |
1588 |
assertFalse(it.hasNext()); |
1589 |
try { |
1590 |
it.next(); |
1591 |
shouldThrow(); |
1592 |
} catch (NoSuchElementException success) {} |
1593 |
} |
1594 |
|
1595 |
/** |
1596 |
* Descending iterator ordering is reverse FIFO |
1597 |
*/ |
1598 |
public void testDescendingIteratorOrdering() { |
1599 |
final LinkedBlockingDeque q = new LinkedBlockingDeque(); |
1600 |
for (int iters = 0; iters < 100; ++iters) { |
1601 |
q.add(new Integer(3)); |
1602 |
q.add(new Integer(2)); |
1603 |
q.add(new Integer(1)); |
1604 |
int k = 0; |
1605 |
for (Iterator it = q.descendingIterator(); it.hasNext();) { |
1606 |
assertEquals(++k, it.next()); |
1607 |
} |
1608 |
|
1609 |
assertEquals(3, k); |
1610 |
q.remove(); |
1611 |
q.remove(); |
1612 |
q.remove(); |
1613 |
} |
1614 |
} |
1615 |
|
1616 |
/** |
1617 |
* descendingIterator.remove removes current element |
1618 |
*/ |
1619 |
public void testDescendingIteratorRemove() { |
1620 |
final LinkedBlockingDeque q = new LinkedBlockingDeque(); |
1621 |
for (int iters = 0; iters < 100; ++iters) { |
1622 |
q.add(new Integer(3)); |
1623 |
q.add(new Integer(2)); |
1624 |
q.add(new Integer(1)); |
1625 |
Iterator it = q.descendingIterator(); |
1626 |
assertEquals(it.next(), new Integer(1)); |
1627 |
it.remove(); |
1628 |
assertEquals(it.next(), new Integer(2)); |
1629 |
it = q.descendingIterator(); |
1630 |
assertEquals(it.next(), new Integer(2)); |
1631 |
assertEquals(it.next(), new Integer(3)); |
1632 |
it.remove(); |
1633 |
assertFalse(it.hasNext()); |
1634 |
q.remove(); |
1635 |
} |
1636 |
} |
1637 |
|
1638 |
/** |
1639 |
* toString contains toStrings of elements |
1640 |
*/ |
1641 |
public void testToString() { |
1642 |
LinkedBlockingDeque q = populatedDeque(SIZE); |
1643 |
String s = q.toString(); |
1644 |
for (int i = 0; i < SIZE; ++i) { |
1645 |
assertTrue(s.contains(String.valueOf(i))); |
1646 |
} |
1647 |
} |
1648 |
|
1649 |
/** |
1650 |
* offer transfers elements across Executor tasks |
1651 |
*/ |
1652 |
public void testOfferInExecutor() { |
1653 |
final LinkedBlockingDeque q = new LinkedBlockingDeque(2); |
1654 |
q.add(one); |
1655 |
q.add(two); |
1656 |
ExecutorService executor = Executors.newFixedThreadPool(2); |
1657 |
final CheckedBarrier threadsStarted = new CheckedBarrier(2); |
1658 |
executor.execute(new CheckedRunnable() { |
1659 |
public void realRun() throws InterruptedException { |
1660 |
assertFalse(q.offer(three)); |
1661 |
threadsStarted.await(); |
1662 |
assertTrue(q.offer(three, LONG_DELAY_MS, MILLISECONDS)); |
1663 |
assertEquals(0, q.remainingCapacity()); |
1664 |
}}); |
1665 |
|
1666 |
executor.execute(new CheckedRunnable() { |
1667 |
public void realRun() throws InterruptedException { |
1668 |
threadsStarted.await(); |
1669 |
assertSame(one, q.take()); |
1670 |
}}); |
1671 |
|
1672 |
joinPool(executor); |
1673 |
} |
1674 |
|
1675 |
/** |
1676 |
* timed poll retrieves elements across Executor threads |
1677 |
*/ |
1678 |
public void testPollInExecutor() { |
1679 |
final LinkedBlockingDeque q = new LinkedBlockingDeque(2); |
1680 |
final CheckedBarrier threadsStarted = new CheckedBarrier(2); |
1681 |
ExecutorService executor = Executors.newFixedThreadPool(2); |
1682 |
executor.execute(new CheckedRunnable() { |
1683 |
public void realRun() throws InterruptedException { |
1684 |
assertNull(q.poll()); |
1685 |
threadsStarted.await(); |
1686 |
assertSame(one, q.poll(LONG_DELAY_MS, MILLISECONDS)); |
1687 |
checkEmpty(q); |
1688 |
}}); |
1689 |
|
1690 |
executor.execute(new CheckedRunnable() { |
1691 |
public void realRun() throws InterruptedException { |
1692 |
threadsStarted.await(); |
1693 |
q.put(one); |
1694 |
}}); |
1695 |
|
1696 |
joinPool(executor); |
1697 |
} |
1698 |
|
1699 |
/** |
1700 |
* A deserialized serialized deque has same elements in same order |
1701 |
*/ |
1702 |
public void testSerialization() throws Exception { |
1703 |
Queue x = populatedDeque(SIZE); |
1704 |
Queue y = serialClone(x); |
1705 |
|
1706 |
assertNotSame(y, x); |
1707 |
assertEquals(x.size(), y.size()); |
1708 |
assertEquals(x.toString(), y.toString()); |
1709 |
assertTrue(Arrays.equals(x.toArray(), y.toArray())); |
1710 |
while (!x.isEmpty()) { |
1711 |
assertFalse(y.isEmpty()); |
1712 |
assertEquals(x.remove(), y.remove()); |
1713 |
} |
1714 |
assertTrue(y.isEmpty()); |
1715 |
} |
1716 |
|
1717 |
/** |
1718 |
* drainTo(c) empties deque into another collection c |
1719 |
*/ |
1720 |
public void testDrainTo() { |
1721 |
LinkedBlockingDeque q = populatedDeque(SIZE); |
1722 |
ArrayList l = new ArrayList(); |
1723 |
q.drainTo(l); |
1724 |
assertEquals(0, q.size()); |
1725 |
assertEquals(SIZE, l.size()); |
1726 |
for (int i = 0; i < SIZE; ++i) |
1727 |
assertEquals(l.get(i), new Integer(i)); |
1728 |
q.add(zero); |
1729 |
q.add(one); |
1730 |
assertFalse(q.isEmpty()); |
1731 |
assertTrue(q.contains(zero)); |
1732 |
assertTrue(q.contains(one)); |
1733 |
l.clear(); |
1734 |
q.drainTo(l); |
1735 |
assertEquals(0, q.size()); |
1736 |
assertEquals(2, l.size()); |
1737 |
for (int i = 0; i < 2; ++i) |
1738 |
assertEquals(l.get(i), new Integer(i)); |
1739 |
} |
1740 |
|
1741 |
/** |
1742 |
* drainTo empties full deque, unblocking a waiting put. |
1743 |
*/ |
1744 |
public void testDrainToWithActivePut() throws InterruptedException { |
1745 |
final LinkedBlockingDeque q = populatedDeque(SIZE); |
1746 |
Thread t = new Thread(new CheckedRunnable() { |
1747 |
public void realRun() throws InterruptedException { |
1748 |
q.put(new Integer(SIZE+1)); |
1749 |
}}); |
1750 |
|
1751 |
t.start(); |
1752 |
ArrayList l = new ArrayList(); |
1753 |
q.drainTo(l); |
1754 |
assertTrue(l.size() >= SIZE); |
1755 |
for (int i = 0; i < SIZE; ++i) |
1756 |
assertEquals(l.get(i), new Integer(i)); |
1757 |
t.join(); |
1758 |
assertTrue(q.size() + l.size() >= SIZE); |
1759 |
} |
1760 |
|
1761 |
/** |
1762 |
* drainTo(c, n) empties first min(n, size) elements of queue into c |
1763 |
*/ |
1764 |
public void testDrainToN() { |
1765 |
LinkedBlockingDeque q = new LinkedBlockingDeque(); |
1766 |
for (int i = 0; i < SIZE + 2; ++i) { |
1767 |
for (int j = 0; j < SIZE; j++) |
1768 |
assertTrue(q.offer(new Integer(j))); |
1769 |
ArrayList l = new ArrayList(); |
1770 |
q.drainTo(l, i); |
1771 |
int k = (i < SIZE) ? i : SIZE; |
1772 |
assertEquals(k, l.size()); |
1773 |
assertEquals(SIZE-k, q.size()); |
1774 |
for (int j = 0; j < k; ++j) |
1775 |
assertEquals(l.get(j), new Integer(j)); |
1776 |
do {} while (q.poll() != null); |
1777 |
} |
1778 |
} |
1779 |
|
1780 |
/** |
1781 |
* remove(null), contains(null) always return false |
1782 |
*/ |
1783 |
public void testNeverContainsNull() { |
1784 |
Deque<?>[] qs = { |
1785 |
new LinkedBlockingDeque<Object>(), |
1786 |
populatedDeque(2), |
1787 |
}; |
1788 |
|
1789 |
for (Deque<?> q : qs) { |
1790 |
assertFalse(q.contains(null)); |
1791 |
assertFalse(q.remove(null)); |
1792 |
assertFalse(q.removeFirstOccurrence(null)); |
1793 |
assertFalse(q.removeLastOccurrence(null)); |
1794 |
} |
1795 |
} |
1796 |
|
1797 |
} |