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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.ThreadLocalRandom; |
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import junit.framework.Test; |
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public class ArrayBlockingQueueTest extends JSR166TestCase { |
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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 ArrayBlockingQueue.class; } |
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public Collection emptyCollection() { |
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boolean fair = ThreadLocalRandom.current().nextBoolean(); |
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return populatedQueue(0, SIZE, 2 * SIZE, fair); |
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} |
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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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|
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return newTestSuite( |
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ArrayBlockingQueueTest.class, |
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new Fair().testSuite(), |
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new NonFair().testSuite(), |
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CollectionTest.testSuite(new Implementation())); |
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} |
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|
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public static class Fair extends BlockingQueueTest { |
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protected BlockingQueue emptyCollection() { |
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return new ArrayBlockingQueue(SIZE, true); |
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return populatedQueue(0, SIZE, 2 * SIZE, true); |
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} |
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} |
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public static class NonFair extends BlockingQueueTest { |
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protected BlockingQueue emptyCollection() { |
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return new ArrayBlockingQueue(SIZE, false); |
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return populatedQueue(0, SIZE, 2 * SIZE, false); |
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} |
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} |
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public static void main(String[] args) { |
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main(suite(), args); |
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} |
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|
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public static Test suite() { |
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return newTestSuite(ArrayBlockingQueueTest.class, |
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new Fair().testSuite(), |
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new NonFair().testSuite()); |
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/** |
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* Returns a new queue of given size containing consecutive |
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* Integers 0 ... n - 1. |
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*/ |
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static ArrayBlockingQueue<Integer> populatedQueue(int n) { |
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return populatedQueue(n, n, n, false); |
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} |
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/** |
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* Returns a new queue of given size containing consecutive |
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* Integers 0 ... n. |
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* Integers 0 ... n - 1, with given capacity range and fairness. |
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*/ |
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private ArrayBlockingQueue<Integer> populatedQueue(int n) { |
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ArrayBlockingQueue<Integer> q = new ArrayBlockingQueue<Integer>(n); |
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static ArrayBlockingQueue<Integer> populatedQueue( |
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int size, int minCapacity, int maxCapacity, boolean fair) { |
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ThreadLocalRandom rnd = ThreadLocalRandom.current(); |
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int capacity = rnd.nextInt(minCapacity, maxCapacity + 1); |
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ArrayBlockingQueue<Integer> q = new ArrayBlockingQueue<>(capacity); |
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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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// shuffle circular array elements so they wrap |
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{ |
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int n = rnd.nextInt(capacity); |
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for (int i = 0; i < n; i++) q.add(42); |
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for (int i = 0; i < n; i++) q.remove(); |
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} |
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for (int i = 0; i < size; i++) |
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assertTrue(q.offer((Integer) i)); |
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assertEquals(size == 0, q.isEmpty()); |
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assertEquals(capacity - size, q.remainingCapacity()); |
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assertEquals(size, q.size()); |
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if (size > 0) |
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assertEquals((Integer) 0, q.peek()); |
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return q; |
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} |
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} |
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} |
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void checkToArray(ArrayBlockingQueue q) { |
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void checkToArray(ArrayBlockingQueue<Integer> q) { |
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int size = q.size(); |
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Object[] o = q.toArray(); |
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assertEquals(size, o.length); |
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Object[] a1 = q.toArray(); |
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assertEquals(size, a1.length); |
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Integer[] a2 = q.toArray(new Integer[0]); |
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assertEquals(size, a2.length); |
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Integer[] a3 = q.toArray(new Integer[Math.max(0, size - 1)]); |
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assertEquals(size, a3.length); |
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Integer[] a4 = new Integer[size]; |
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assertSame(a4, q.toArray(a4)); |
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Integer[] a5 = new Integer[size + 1]; |
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Arrays.fill(a5, 42); |
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assertSame(a5, q.toArray(a5)); |
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Integer[] a6 = new Integer[size + 2]; |
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Arrays.fill(a6, 42); |
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assertSame(a6, q.toArray(a6)); |
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Object[][] as = { a1, a2, a3, a4, a5, a6 }; |
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for (Object[] a : as) { |
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if (a.length > size) assertNull(a[size]); |
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if (a.length > size + 1) assertEquals(42, a[size + 1]); |
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} |
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Iterator it = q.iterator(); |
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Integer s = q.peek(); |
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for (int i = 0; i < size; i++) { |
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Integer x = (Integer) it.next(); |
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assertEquals((Integer)o[0] + i, (int) x); |
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assertSame(o[i], x); |
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assertEquals(s + i, (int) x); |
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for (Object[] a : as) |
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assertSame(a1[i], x); |
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} |
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} |
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/** |
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* toArray() contains all elements in FIFO order |
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* toArray() and toArray(a) contain all elements in FIFO order |
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*/ |
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public void testToArray() { |
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ArrayBlockingQueue q = new ArrayBlockingQueue(SIZE); |
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for (int i = 0; i < SIZE; i++) { |
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final ThreadLocalRandom rnd = ThreadLocalRandom.current(); |
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final int size = rnd.nextInt(6); |
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final int capacity = Math.max(1, size + rnd.nextInt(size + 1)); |
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ArrayBlockingQueue<Integer> q = new ArrayBlockingQueue<>(capacity); |
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for (int i = 0; i < size; i++) { |
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checkToArray(q); |
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q.add(i); |
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} |
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// Provoke wraparound |
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for (int i = 0; i < SIZE; i++) { |
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checkToArray(q); |
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assertEquals(i, q.poll()); |
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checkToArray(q); |
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q.add(SIZE + i); |
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} |
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for (int i = 0; i < SIZE; i++) { |
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int added = size * 2; |
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for (int i = 0; i < added; i++) { |
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checkToArray(q); |
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assertEquals(SIZE + i, q.poll()); |
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assertEquals((Integer) i, q.poll()); |
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q.add(size + i); |
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} |
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} |
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– |
|
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void checkToArray2(ArrayBlockingQueue q) { |
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int size = q.size(); |
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Integer[] a1 = (size == 0) ? null : new Integer[size - 1]; |
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Integer[] a2 = new Integer[size]; |
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Integer[] a3 = new Integer[size + 2]; |
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if (size > 0) Arrays.fill(a1, 42); |
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Arrays.fill(a2, 42); |
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Arrays.fill(a3, 42); |
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Integer[] b1 = (size == 0) ? null : (Integer[]) q.toArray(a1); |
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Integer[] b2 = (Integer[]) q.toArray(a2); |
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Integer[] b3 = (Integer[]) q.toArray(a3); |
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assertSame(a2, b2); |
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assertSame(a3, b3); |
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Iterator it = q.iterator(); |
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for (int i = 0; i < size; i++) { |
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Integer x = (Integer) it.next(); |
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assertSame(b1[i], x); |
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assertEquals(b1[0] + i, (int) x); |
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< |
assertSame(b2[i], x); |
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< |
assertSame(b3[i], x); |
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< |
} |
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< |
assertNull(a3[size]); |
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< |
assertEquals(42, (int) a3[size + 1]); |
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< |
if (size > 0) { |
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assertNotSame(a1, b1); |
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< |
assertEquals(size, b1.length); |
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< |
for (int i = 0; i < a1.length; i++) { |
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< |
assertEquals(42, (int) a1[i]); |
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< |
} |
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< |
} |
| 658 |
< |
} |
| 659 |
< |
|
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< |
/** |
| 661 |
< |
* toArray(a) contains all elements in FIFO order |
| 662 |
< |
*/ |
| 663 |
< |
public void testToArray2() { |
| 664 |
< |
ArrayBlockingQueue q = new ArrayBlockingQueue(SIZE); |
| 665 |
< |
for (int i = 0; i < SIZE; i++) { |
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< |
checkToArray2(q); |
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< |
q.add(i); |
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< |
} |
| 669 |
< |
// Provoke wraparound |
| 670 |
< |
for (int i = 0; i < SIZE; i++) { |
| 671 |
< |
checkToArray2(q); |
| 672 |
< |
assertEquals(i, q.poll()); |
| 673 |
< |
checkToArray2(q); |
| 674 |
< |
q.add(SIZE + i); |
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< |
} |
| 676 |
< |
for (int i = 0; i < SIZE; i++) { |
| 677 |
< |
checkToArray2(q); |
| 678 |
< |
assertEquals(SIZE + i, q.poll()); |
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> |
checkToArray(q); |
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> |
assertEquals((Integer) (added + i), q.poll()); |
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} |
| 681 |
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} |
| 682 |
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|
| 683 |
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/** |
| 684 |
|
* toArray(incompatible array type) throws ArrayStoreException |
| 685 |
|
*/ |
| 686 |
< |
public void testToArray1_BadArg() { |
| 686 |
> |
public void testToArray_incompatibleArrayType() { |
| 687 |
|
ArrayBlockingQueue q = populatedQueue(SIZE); |
| 688 |
|
try { |
| 689 |
|
q.toArray(new String[10]); |
| 690 |
|
shouldThrow(); |
| 691 |
|
} catch (ArrayStoreException success) {} |
| 692 |
+ |
try { |
| 693 |
+ |
q.toArray(new String[0]); |
| 694 |
+ |
shouldThrow(); |
| 695 |
+ |
} catch (ArrayStoreException success) {} |
| 696 |
|
} |
| 697 |
|
|
| 698 |
|
/** |
