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* Pat Fisher, Mike Judd. |
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*/ |
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import junit.framework.*; |
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import java.util.Arrays; |
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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.Iterator; |
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import java.util.NoSuchElementException; |
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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.SynchronousQueue; |
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import static java.util.concurrent.TimeUnit.MILLISECONDS; |
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import junit.framework.Test; |
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public class SynchronousQueueTest extends JSR166TestCase { |
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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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main(suite(), args); |
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} |
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public static Test suite() { |
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pleaseOffer.countDown(); |
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startTime = System.nanoTime(); |
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assertSame(zero, q.poll(LONG_DELAY_MS, MILLISECONDS)); |
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assertTrue(millisElapsedSince(startTime) < MEDIUM_DELAY_MS); |
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Thread.currentThread().interrupt(); |
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try { |
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shouldThrow(); |
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} catch (InterruptedException success) {} |
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assertFalse(Thread.interrupted()); |
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assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS); |
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}}); |
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await(pleaseOffer); |
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long startTime = System.nanoTime(); |
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try { assertTrue(q.offer(zero, LONG_DELAY_MS, MILLISECONDS)); } |
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catch (InterruptedException e) { threadUnexpectedException(e); } |
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assertTrue(millisElapsedSince(startTime) < MEDIUM_DELAY_MS); |
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assertTrue(millisElapsedSince(startTime) < LONG_DELAY_MS); |
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await(pleaseInterrupt); |
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assertThreadStaysAlive(t); |
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public void testToArray2() { testToArray2(false); } |
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public void testToArray2_fair() { testToArray2(true); } |
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public void testToArray2(boolean fair) { |
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final SynchronousQueue<Integer> q |
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= new SynchronousQueue<Integer>(fair); |
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final SynchronousQueue<Integer> q = new SynchronousQueue<>(fair); |
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Integer[] a; |
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a = new Integer[0]; |
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public void testToArray_null(boolean fair) { |
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final SynchronousQueue q = new SynchronousQueue(fair); |
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try { |
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Object o[] = q.toArray(null); |
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Object[] o = q.toArray(null); |
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shouldThrow(); |
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} catch (NullPointerException success) {} |
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} |
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public void testIterator() { testIterator(false); } |
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public void testIterator_fair() { testIterator(true); } |
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public void testIterator(boolean fair) { |
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final SynchronousQueue q = new SynchronousQueue(fair); |
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Iterator it = q.iterator(); |
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assertFalse(it.hasNext()); |
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try { |
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Object x = it.next(); |
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shouldThrow(); |
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} catch (NoSuchElementException success) {} |
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assertIteratorExhausted(new SynchronousQueue(fair).iterator()); |
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} |
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/** |
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public void testOfferInExecutor_fair() { testOfferInExecutor(true); } |
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public void testOfferInExecutor(boolean fair) { |
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final SynchronousQueue q = new SynchronousQueue(fair); |
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ExecutorService executor = Executors.newFixedThreadPool(2); |
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final CheckedBarrier threadsStarted = new CheckedBarrier(2); |
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final ExecutorService executor = Executors.newFixedThreadPool(2); |
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try (PoolCleaner cleaner = cleaner(executor)) { |
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executor.execute(new CheckedRunnable() { |
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public void realRun() throws InterruptedException { |
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assertFalse(q.offer(one)); |
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threadsStarted.await(); |
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assertTrue(q.offer(one, LONG_DELAY_MS, MILLISECONDS)); |
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assertEquals(0, q.remainingCapacity()); |
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}}); |
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executor.execute(new CheckedRunnable() { |
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public void realRun() throws InterruptedException { |
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threadsStarted.await(); |
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assertSame(one, q.take()); |
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}}); |
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joinPool(executor); |
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executor.execute(new CheckedRunnable() { |
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public void realRun() throws InterruptedException { |
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assertFalse(q.offer(one)); |
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threadsStarted.await(); |
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assertTrue(q.offer(one, LONG_DELAY_MS, MILLISECONDS)); |
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assertEquals(0, q.remainingCapacity()); |
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}}); |
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executor.execute(new CheckedRunnable() { |
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public void realRun() throws InterruptedException { |
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threadsStarted.await(); |
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assertSame(one, q.take()); |
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}}); |
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} |
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} |
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/** |
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public void testPollInExecutor(boolean fair) { |
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final SynchronousQueue q = new SynchronousQueue(fair); |
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final CheckedBarrier threadsStarted = new CheckedBarrier(2); |
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ExecutorService executor = Executors.newFixedThreadPool(2); |
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executor.execute(new CheckedRunnable() { |
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public void realRun() throws InterruptedException { |
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assertNull(q.poll()); |
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threadsStarted.await(); |
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assertSame(one, q.poll(LONG_DELAY_MS, MILLISECONDS)); |
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assertTrue(q.isEmpty()); |
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}}); |
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executor.execute(new CheckedRunnable() { |
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public void realRun() throws InterruptedException { |
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threadsStarted.await(); |
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q.put(one); |
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}}); |
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joinPool(executor); |
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final ExecutorService executor = Executors.newFixedThreadPool(2); |
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try (PoolCleaner cleaner = cleaner(executor)) { |
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executor.execute(new CheckedRunnable() { |
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public void realRun() throws InterruptedException { |
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assertNull(q.poll()); |
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threadsStarted.await(); |
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assertSame(one, q.poll(LONG_DELAY_MS, MILLISECONDS)); |
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assertTrue(q.isEmpty()); |
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}}); |
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executor.execute(new CheckedRunnable() { |
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public void realRun() throws InterruptedException { |
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threadsStarted.await(); |
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q.put(one); |
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}}); |
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} |
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} |
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/** |
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fail("timed out"); |
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Thread.yield(); |
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} |
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assertTrue(l.size() == 1); |
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assertEquals(1, l.size()); |
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assertSame(one, l.get(0)); |
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awaitTermination(t); |
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} |
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}}); |
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ArrayList l = new ArrayList(); |
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delay(SHORT_DELAY_MS); |
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q.drainTo(l, 1); |
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int drained; |
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while ((drained = q.drainTo(l, 1)) == 0) Thread.yield(); |
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assertEquals(1, drained); |
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assertEquals(1, l.size()); |
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q.drainTo(l, 1); |
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while ((drained = q.drainTo(l, 1)) == 0) Thread.yield(); |
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assertEquals(1, drained); |
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assertEquals(2, l.size()); |
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assertTrue(l.contains(one)); |
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assertTrue(l.contains(two)); |