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* Pat Fisher, Mike Judd. |
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*/ |
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import junit.framework.*; |
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import static java.util.concurrent.TimeUnit.MILLISECONDS; |
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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.Queue; |
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import java.util.concurrent.BlockingQueue; |
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import java.util.concurrent.CountDownLatch; |
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import static java.util.concurrent.TimeUnit.MILLISECONDS; |
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import junit.framework.Test; |
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import junit.framework.TestSuite; |
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/** |
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* Contains "contract" tests applicable to all BlockingQueue implementations. |
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//---------------------------------------------------------------- |
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// Configuration methods |
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//---------------------------------------------------------------- |
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|
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/** Returns an empty instance of the implementation class. */ |
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protected abstract BlockingQueue emptyCollection(); |
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//---------------------------------------------------------------- |
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// Tests |
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//---------------------------------------------------------------- |
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/** |
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* offer(null) throws NullPointerException |
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*/ |
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} |
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/** |
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* put(null) throws NullPointerException |
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* addAll(null) throws NullPointerException |
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*/ |
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public void testAddAllNull() throws InterruptedException { |
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final Collection q = emptyCollection(); |
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public void testToArray_NullArray() { |
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final Collection q = emptyCollection(); |
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try { |
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q.toArray(null); |
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q.toArray((Object[])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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* drainTo(c, n) returns 0 and does nothing when n <= 0 |
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*/ |
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public void testDrainToNonPositiveMaxElements() { |
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final BlockingQueue q = emptyCollection(); |
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final int[] ns = { 0, -1, -42, Integer.MIN_VALUE }; |
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final ArrayList sink = new ArrayList(); |
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for (int n : ns) { |
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assertEquals(0, q.drainTo(sink, n)); |
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assertTrue(sink.isEmpty()); |
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} |
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if (q.remainingCapacity() > 0) { |
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// Not SynchronousQueue, that is |
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Object one = makeElement(1); |
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q.add(one); |
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for (int n : ns) |
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assertEquals(0, q.drainTo(sink, n)); |
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assertEquals(1, q.size()); |
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assertSame(one, q.poll()); |
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assertTrue(sink.isEmpty()); |
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} |
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} |
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|
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/** |
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* timed poll before a delayed offer times out; after offer succeeds; |
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* on interruption throws |
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*/ |
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Thread.currentThread().interrupt(); |
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try { |
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q.poll(LONG_DELAY_MS, MILLISECONDS); |
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q.poll(randomTimeout(), randomTimeUnit()); |
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shouldThrow(); |
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} catch (InterruptedException success) {} |
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assertFalse(Thread.interrupted()); |
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shouldThrow(); |
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} catch (InterruptedException success) {} |
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assertFalse(Thread.interrupted()); |
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|
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assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS); |
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}}); |
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barrier.await(); |
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assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS); |
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barrier.await(); |
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assertThreadStaysAlive(t); |
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if (randomBoolean()) assertThreadBlocks(t, Thread.State.TIMED_WAITING); |
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t.interrupt(); |
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awaitTermination(t); |
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} |
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}}); |
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await(threadStarted); |
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assertThreadStaysAlive(t); |
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if (randomBoolean()) assertThreadBlocks(t, Thread.State.WAITING); |
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t.interrupt(); |
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awaitTermination(t); |
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} |
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Thread t = newStartedThread(new CheckedRunnable() { |
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public void realRun() { |
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threadStarted.countDown(); |
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long startTime = System.nanoTime(); |
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|
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try { |
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q.poll(2 * LONG_DELAY_MS, MILLISECONDS); |
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q.poll(LONG_DELAY_MS, MILLISECONDS); |
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shouldThrow(); |
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} catch (InterruptedException success) {} |
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assertFalse(Thread.interrupted()); |
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|
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assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS); |
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}}); |
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await(threadStarted); |
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assertThreadStaysAlive(t); |
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if (randomBoolean()) assertThreadBlocks(t, Thread.State.TIMED_WAITING); |
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t.interrupt(); |
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awaitTermination(t); |
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} |
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final BlockingQueue q = emptyCollection(); |
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Thread t = newStartedThread(new CheckedRunnable() { |
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public void realRun() { |
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long startTime = System.nanoTime(); |
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|
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Thread.currentThread().interrupt(); |
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try { |
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q.poll(2 * LONG_DELAY_MS, MILLISECONDS); |
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q.poll(LONG_DELAY_MS, MILLISECONDS); |
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shouldThrow(); |
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} catch (InterruptedException success) {} |
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assertFalse(Thread.interrupted()); |
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|
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assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS); |
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}}); |
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awaitTermination(t); |
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} |
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|
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/** |
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* remove(x) removes x and returns true if present |
347 |
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* TODO: move to superclass CollectionTest.java |
348 |
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*/ |
349 |
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public void testRemoveElement() { |
350 |
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final BlockingQueue q = emptyCollection(); |
351 |
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final int size = Math.min(q.remainingCapacity(), SIZE); |
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final Object[] elts = new Object[size]; |
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assertFalse(q.contains(makeElement(99))); |
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assertFalse(q.remove(makeElement(99))); |
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checkEmpty(q); |
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for (int i = 0; i < size; i++) |
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q.add(elts[i] = makeElement(i)); |
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for (int i = 1; i < size; i += 2) { |
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for (int pass = 0; pass < 2; pass++) { |
360 |
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assertEquals((pass == 0), q.contains(elts[i])); |
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assertEquals((pass == 0), q.remove(elts[i])); |
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assertFalse(q.contains(elts[i])); |
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assertTrue(q.contains(elts[i - 1])); |
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if (i < size - 1) |
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assertTrue(q.contains(elts[i + 1])); |
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} |
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} |
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if (size > 0) |
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assertTrue(q.contains(elts[0])); |
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for (int i = size - 2; i >= 0; i -= 2) { |
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assertTrue(q.contains(elts[i])); |
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assertFalse(q.contains(elts[i + 1])); |
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assertTrue(q.remove(elts[i])); |
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assertFalse(q.contains(elts[i])); |
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assertFalse(q.remove(elts[i + 1])); |
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assertFalse(q.contains(elts[i + 1])); |
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} |
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checkEmpty(q); |
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} |
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|
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/** For debugging. */ |
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public void XXXXtestFails() { |
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fail(emptyCollection().getClass().toString()); |