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diff --git a/jsr166-tests/src/test/java/jsr166/ConcurrentLinkedQueueTest.java b/jsr166-tests/src/test/java/jsr166/ConcurrentLinkedQueueTest.java
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+/*
+ * Written by Doug Lea with assistance from members of JCP JSR-166
+ * Expert Group and released to the public domain, as explained at
+ * http://creativecommons.org/publicdomain/zero/1.0/
+ * Other contributors include Andrew Wright, Jeffrey Hayes,
+ * Pat Fisher, Mike Judd.
+ */
+
+package jsr166;
+
+import junit.framework.*;
+import java.util.Arrays;
+import java.util.Collection;
+import java.util.Iterator;
+import java.util.NoSuchElementException;
+import java.util.Queue;
+import java.util.concurrent.ConcurrentLinkedQueue;
+
+public class ConcurrentLinkedQueueTest extends JSR166TestCase {
+
+    /**
+     * Returns a new queue of given size containing consecutive
+     * Integers 0 ... n.
+     */
+    private ConcurrentLinkedQueue<Integer> populatedQueue(int n) {
+        ConcurrentLinkedQueue<Integer> q = new ConcurrentLinkedQueue<Integer>();
+        assertTrue(q.isEmpty());
+        for (int i = 0; i < n; ++i)
+            assertTrue(q.offer(new Integer(i)));
+        assertFalse(q.isEmpty());
+        assertEquals(n, q.size());
+        return q;
+    }
+
+    /**
+     * new queue is empty
+     */
+    public void testConstructor1() {
+        assertEquals(0, new ConcurrentLinkedQueue().size());
+    }
+
+    /**
+     * Initializing from null Collection throws NPE
+     */
+    public void testConstructor3() {
+        try {
+            ConcurrentLinkedQueue q = new ConcurrentLinkedQueue((Collection)null);
+            shouldThrow();
+        } catch (NullPointerException success) {}
+    }
+
+    /**
+     * Initializing from Collection of null elements throws NPE
+     */
+    public void testConstructor4() {
+        try {
+            Integer[] ints = new Integer[SIZE];
+            ConcurrentLinkedQueue q = new ConcurrentLinkedQueue(Arrays.asList(ints));
+            shouldThrow();
+        } catch (NullPointerException success) {}
+    }
+
+    /**
+     * Initializing from Collection with some null elements throws NPE
+     */
+    public void testConstructor5() {
+        try {
+            Integer[] ints = new Integer[SIZE];
+            for (int i = 0; i < SIZE-1; ++i)
+                ints[i] = new Integer(i);
+            ConcurrentLinkedQueue q = new ConcurrentLinkedQueue(Arrays.asList(ints));
+            shouldThrow();
+        } catch (NullPointerException success) {}
+    }
+
+    /**
+     * Queue contains all elements of collection used to initialize
+     */
+    public void testConstructor6() {
+        Integer[] ints = new Integer[SIZE];
+        for (int i = 0; i < SIZE; ++i)
+            ints[i] = new Integer(i);
+        ConcurrentLinkedQueue q = new ConcurrentLinkedQueue(Arrays.asList(ints));
+        for (int i = 0; i < SIZE; ++i)
+            assertEquals(ints[i], q.poll());
+    }
+
+    /**
+     * isEmpty is true before add, false after
+     */
+    public void testEmpty() {
+        ConcurrentLinkedQueue q = new ConcurrentLinkedQueue();
+        assertTrue(q.isEmpty());
+        q.add(one);
+        assertFalse(q.isEmpty());
+        q.add(two);
+        q.remove();
+        q.remove();
+        assertTrue(q.isEmpty());
+    }
+
+    /**
+     * size changes when elements added and removed
+     */
+    public void testSize() {
+        ConcurrentLinkedQueue q = populatedQueue(SIZE);
+        for (int i = 0; i < SIZE; ++i) {
+            assertEquals(SIZE-i, q.size());
+            q.remove();
+        }
+        for (int i = 0; i < SIZE; ++i) {
+            assertEquals(i, q.size());
+            q.add(new Integer(i));
+        }
+    }
+
+    /**
+     * offer(null) throws NPE
+     */
+    public void testOfferNull() {
+        try {
+            ConcurrentLinkedQueue q = new ConcurrentLinkedQueue();
+            q.offer(null);
+            shouldThrow();
+        } catch (NullPointerException success) {}
+    }
+
+    /**
+     * add(null) throws NPE
+     */
+    public void testAddNull() {
+        try {
+            ConcurrentLinkedQueue q = new ConcurrentLinkedQueue();
+            q.add(null);
+            shouldThrow();
+        } catch (NullPointerException success) {}
+    }
+
+    /**
+     * Offer returns true
+     */
+    public void testOffer() {
+        ConcurrentLinkedQueue q = new ConcurrentLinkedQueue();
+        assertTrue(q.offer(zero));
+        assertTrue(q.offer(one));
+    }
+
+    /**
+     * add returns true
+     */
+    public void testAdd() {
+        ConcurrentLinkedQueue q = new ConcurrentLinkedQueue();
+        for (int i = 0; i < SIZE; ++i) {
+            assertEquals(i, q.size());
+            assertTrue(q.add(new Integer(i)));
+        }
+    }
+
+    /**
+     * addAll(null) throws NPE
+     */
+    public void testAddAll1() {
+        try {
+            ConcurrentLinkedQueue q = new ConcurrentLinkedQueue();
+            q.addAll(null);
+            shouldThrow();
+        } catch (NullPointerException success) {}
+    }
+
+    /**
+     * addAll(this) throws IAE
+     */
+    public void testAddAllSelf() {
+        try {
+            ConcurrentLinkedQueue q = populatedQueue(SIZE);
+            q.addAll(q);
+            shouldThrow();
+        } catch (IllegalArgumentException success) {}
+    }
+
+    /**
+     * addAll of a collection with null elements throws NPE
+     */
+    public void testAddAll2() {
+        try {
+            ConcurrentLinkedQueue q = new ConcurrentLinkedQueue();
+            Integer[] ints = new Integer[SIZE];
+            q.addAll(Arrays.asList(ints));
+            shouldThrow();
+        } catch (NullPointerException success) {}
+    }
+
+    /**
+     * addAll of a collection with any null elements throws NPE after
+     * possibly adding some elements
+     */
+    public void testAddAll3() {
+        try {
+            ConcurrentLinkedQueue q = new ConcurrentLinkedQueue();
+            Integer[] ints = new Integer[SIZE];
+            for (int i = 0; i < SIZE-1; ++i)
+                ints[i] = new Integer(i);
+            q.addAll(Arrays.asList(ints));
+            shouldThrow();
+        } catch (NullPointerException success) {}
+    }
+
+    /**
+     * Queue contains all elements, in traversal order, of successful addAll
+     */
+    public void testAddAll5() {
+        Integer[] empty = new Integer[0];
+        Integer[] ints = new Integer[SIZE];
+        for (int i = 0; i < SIZE; ++i)
+            ints[i] = new Integer(i);
+        ConcurrentLinkedQueue q = new ConcurrentLinkedQueue();
+        assertFalse(q.addAll(Arrays.asList(empty)));
+        assertTrue(q.addAll(Arrays.asList(ints)));
+        for (int i = 0; i < SIZE; ++i)
+            assertEquals(ints[i], q.poll());
+    }
+
+    /**
+     * poll succeeds unless empty
+     */
+    public void testPoll() {
+        ConcurrentLinkedQueue q = populatedQueue(SIZE);
+        for (int i = 0; i < SIZE; ++i) {
+            assertEquals(i, q.poll());
+        }
+        assertNull(q.poll());
+    }
+
+    /**
+     * peek returns next element, or null if empty
+     */
+    public void testPeek() {
+        ConcurrentLinkedQueue q = populatedQueue(SIZE);
+        for (int i = 0; i < SIZE; ++i) {
+            assertEquals(i, q.peek());
+            assertEquals(i, q.poll());
+            assertTrue(q.peek() == null ||
+                       !q.peek().equals(i));
+        }
+        assertNull(q.peek());
+    }
+
+    /**
+     * element returns next element, or throws NSEE if empty
+     */
+    public void testElement() {
+        ConcurrentLinkedQueue q = populatedQueue(SIZE);
+        for (int i = 0; i < SIZE; ++i) {
+            assertEquals(i, q.element());
+            assertEquals(i, q.poll());
+        }
+        try {
+            q.element();
+            shouldThrow();
+        } catch (NoSuchElementException success) {}
+    }
+
+    /**
+     * remove removes next element, or throws NSEE if empty
+     */
+    public void testRemove() {
+        ConcurrentLinkedQueue q = populatedQueue(SIZE);
+        for (int i = 0; i < SIZE; ++i) {
+            assertEquals(i, q.remove());
+        }
+        try {
+            q.remove();
+            shouldThrow();
+        } catch (NoSuchElementException success) {}
+    }
+
+    /**
+     * remove(x) removes x and returns true if present
+     */
+    public void testRemoveElement() {
+        ConcurrentLinkedQueue q = populatedQueue(SIZE);
+        for (int i = 1; i < SIZE; i+=2) {
+            assertTrue(q.contains(i));
+            assertTrue(q.remove(i));
+            assertFalse(q.contains(i));
+            assertTrue(q.contains(i-1));
+        }
+        for (int i = 0; i < SIZE; i+=2) {
+            assertTrue(q.contains(i));
+            assertTrue(q.remove(i));
+            assertFalse(q.contains(i));
+            assertFalse(q.remove(i+1));
+            assertFalse(q.contains(i+1));
+        }
+        assertTrue(q.isEmpty());
+    }
+
+    /**
+     * contains(x) reports true when elements added but not yet removed
+     */
+    public void testContains() {
+        ConcurrentLinkedQueue q = populatedQueue(SIZE);
+        for (int i = 0; i < SIZE; ++i) {
+            assertTrue(q.contains(new Integer(i)));
+            q.poll();
+            assertFalse(q.contains(new Integer(i)));
+        }
+    }
+
+    /**
+     * clear removes all elements
+     */
+    public void testClear() {
+        ConcurrentLinkedQueue q = populatedQueue(SIZE);
+        q.clear();
+        assertTrue(q.isEmpty());
+        assertEquals(0, q.size());
+        q.add(one);
+        assertFalse(q.isEmpty());
+        q.clear();
+        assertTrue(q.isEmpty());
+    }
+
+    /**
+     * containsAll(c) is true when c contains a subset of elements
+     */
+    public void testContainsAll() {
+        ConcurrentLinkedQueue q = populatedQueue(SIZE);
+        ConcurrentLinkedQueue p = new ConcurrentLinkedQueue();
+        for (int i = 0; i < SIZE; ++i) {
+            assertTrue(q.containsAll(p));
+            assertFalse(p.containsAll(q));
+            p.add(new Integer(i));
+        }
+        assertTrue(p.containsAll(q));
+    }
+
+    /**
+     * retainAll(c) retains only those elements of c and reports true if change
+     */
+    public void testRetainAll() {
+        ConcurrentLinkedQueue q = populatedQueue(SIZE);
+        ConcurrentLinkedQueue p = populatedQueue(SIZE);
+        for (int i = 0; i < SIZE; ++i) {
+            boolean changed = q.retainAll(p);
+            if (i == 0)
+                assertFalse(changed);
+            else
+                assertTrue(changed);
+
+            assertTrue(q.containsAll(p));
+            assertEquals(SIZE-i, q.size());
+            p.remove();
+        }
+    }
+
+    /**
+     * removeAll(c) removes only those elements of c and reports true if changed
+     */
+    public void testRemoveAll() {
+        for (int i = 1; i < SIZE; ++i) {
+            ConcurrentLinkedQueue q = populatedQueue(SIZE);
+            ConcurrentLinkedQueue p = populatedQueue(i);
+            assertTrue(q.removeAll(p));
+            assertEquals(SIZE-i, q.size());
+            for (int j = 0; j < i; ++j) {
+                Integer I = (Integer)(p.remove());
+                assertFalse(q.contains(I));
+            }
+        }
+    }
+
+    /**
+     * toArray contains all elements in FIFO order
+     */
+    public void testToArray() {
+        ConcurrentLinkedQueue q = populatedQueue(SIZE);
+        Object[] o = q.toArray();
+        for (int i = 0; i < o.length; i++)
+            assertSame(o[i], q.poll());
+    }
+
+    /**
+     * toArray(a) contains all elements in FIFO order
+     */
+    public void testToArray2() {
+        ConcurrentLinkedQueue<Integer> q = populatedQueue(SIZE);
+        Integer[] ints = new Integer[SIZE];
+        Integer[] array = q.toArray(ints);
+        assertSame(ints, array);
+        for (int i = 0; i < ints.length; i++)
+            assertSame(ints[i], q.poll());
+    }
+
+    /**
+     * toArray(null) throws NullPointerException
+     */
+    public void testToArray_NullArg() {
+        ConcurrentLinkedQueue q = populatedQueue(SIZE);
+        try {
+            q.toArray(null);
+            shouldThrow();
+        } catch (NullPointerException success) {}
+    }
+
+    /**
+     * toArray(incompatible array type) throws ArrayStoreException
+     */
+    public void testToArray1_BadArg() {
+        ConcurrentLinkedQueue q = populatedQueue(SIZE);
+        try {
+            q.toArray(new String[10]);
+            shouldThrow();
+        } catch (ArrayStoreException success) {}
+    }
+
+    /**
+     * iterator iterates through all elements
+     */
+    public void testIterator() {
+        ConcurrentLinkedQueue q = populatedQueue(SIZE);
+        int i = 0;
+        Iterator it = q.iterator();
+        while (it.hasNext()) {
+            assertTrue(q.contains(it.next()));
+            ++i;
+        }
+        assertEquals(i, SIZE);
+    }
+
+    /**
+     * iterator ordering is FIFO
+     */
+    public void testIteratorOrdering() {
+        final ConcurrentLinkedQueue q = new ConcurrentLinkedQueue();
+        q.add(one);
+        q.add(two);
+        q.add(three);
+
+        int k = 0;
+        for (Iterator it = q.iterator(); it.hasNext();) {
+            assertEquals(++k, it.next());
+        }
+
+        assertEquals(3, k);
+    }
+
+    /**
+     * Modifications do not cause iterators to fail
+     */
+    public void testWeaklyConsistentIteration() {
+        final ConcurrentLinkedQueue q = new ConcurrentLinkedQueue();
+        q.add(one);
+        q.add(two);
+        q.add(three);
+
+        for (Iterator it = q.iterator(); it.hasNext();) {
+            q.remove();
+            it.next();
+        }
+
+        assertEquals("queue should be empty again", 0, q.size());
+    }
+
+    /**
+     * iterator.remove removes current element
+     */
+    public void testIteratorRemove() {
+        final ConcurrentLinkedQueue q = new ConcurrentLinkedQueue();
+        q.add(one);
+        q.add(two);
+        q.add(three);
+        Iterator it = q.iterator();
+        it.next();
+        it.remove();
+        it = q.iterator();
+        assertSame(it.next(), two);
+        assertSame(it.next(), three);
+        assertFalse(it.hasNext());
+    }
+
+    /**
+     * toString contains toStrings of elements
+     */
+    public void testToString() {
+        ConcurrentLinkedQueue q = populatedQueue(SIZE);
+        String s = q.toString();
+        for (int i = 0; i < SIZE; ++i) {
+            assertTrue(s.contains(String.valueOf(i)));
+        }
+    }
+
+    /**
+     * A deserialized serialized queue has same elements in same order
+     */
+    public void testSerialization() throws Exception {
+        Queue x = populatedQueue(SIZE);
+        Queue y = serialClone(x);
+
+        assertNotSame(x, y);
+        assertEquals(x.size(), y.size());
+        assertEquals(x.toString(), y.toString());
+        assertTrue(Arrays.equals(x.toArray(), y.toArray()));
+        while (!x.isEmpty()) {
+            assertFalse(y.isEmpty());
+            assertEquals(x.remove(), y.remove());
+        }
+        assertTrue(y.isEmpty());
+    }
+
+}