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* Written by members of JCP JSR-166 Expert Group and released to the |
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* public domain. Use, modify, and redistribute this code in any way |
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* without acknowledgement. Other contributors include Andrew Wright, |
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* Jeffrey Hayes, Pat Fischer, Mike Judd. |
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*/ |
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import junit.framework.*; |
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import java.util.*; |
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import java.util.concurrent.*; |
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import java.math.BigInteger; |
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import java.security.*; |
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public class ExecutorCompletionServiceTest extends JSR166TestCase{ |
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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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public static Test suite() { |
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return new TestSuite(ExecutorCompletionServiceTest.class); |
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} |
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/** |
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* Creating a new ECS with null Executor throw NPE |
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*/ |
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public void testConstructorNPE() { |
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try { |
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ExecutorCompletionService ecs = new ExecutorCompletionService(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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* Creating a new ECS with null queue throw NPE |
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*/ |
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public void testConstructorNPE2() { |
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try { |
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ExecutorService e = Executors.newCachedThreadPool(); |
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ExecutorCompletionService ecs = new ExecutorCompletionService(e, 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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* Submitting a null callable throws NPE |
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*/ |
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public void testSubmitNPE() { |
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ExecutorService e = Executors.newCachedThreadPool(); |
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ExecutorCompletionService ecs = new ExecutorCompletionService(e); |
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try { |
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Callable c = null; |
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ecs.submit(c); |
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shouldThrow(); |
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} catch (NullPointerException success) { |
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} finally { |
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joinPool(e); |
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} |
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} |
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/** |
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* Submitting a null runnable throws NPE |
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*/ |
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public void testSubmitNPE2() { |
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ExecutorService e = Executors.newCachedThreadPool(); |
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ExecutorCompletionService ecs = new ExecutorCompletionService(e); |
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try { |
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Runnable r = null; |
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ecs.submit(r, Boolean.TRUE); |
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shouldThrow(); |
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} catch (NullPointerException success) { |
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} finally { |
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joinPool(e); |
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} |
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} |
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/** |
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* A taken submitted task is completed |
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*/ |
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public void testTake() { |
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ExecutorService e = Executors.newCachedThreadPool(); |
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ExecutorCompletionService ecs = new ExecutorCompletionService(e); |
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try { |
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Callable c = new StringTask(); |
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ecs.submit(c); |
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Future f = ecs.take(); |
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assert(f.isDone()); |
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} catch (Exception ex) { |
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unexpectedException(); |
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} finally { |
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joinPool(e); |
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} |
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} |
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/** |
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* Take returns the same future object returned by submit |
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*/ |
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public void testTake2() { |
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ExecutorService e = Executors.newCachedThreadPool(); |
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ExecutorCompletionService ecs = new ExecutorCompletionService(e); |
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try { |
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Callable c = new StringTask(); |
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Future f1 = ecs.submit(c); |
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Future f2 = ecs.take(); |
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assertSame(f1, f2); |
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} catch (Exception ex) { |
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unexpectedException(); |
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} finally { |
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joinPool(e); |
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} |
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} |
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/** |
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* If poll returns non-null, the returned task is completed |
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*/ |
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public void testPoll1() { |
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ExecutorService e = Executors.newCachedThreadPool(); |
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ExecutorCompletionService ecs = new ExecutorCompletionService(e); |
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try { |
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assertNull(ecs.poll()); |
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Callable c = new StringTask(); |
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ecs.submit(c); |
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Thread.sleep(SHORT_DELAY_MS); |
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for (;;) { |
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Future f = ecs.poll(); |
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if (f != null) { |
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assert(f.isDone()); |
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break; |
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} |
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} |
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} catch (Exception ex) { |
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unexpectedException(); |
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} finally { |
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joinPool(e); |
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} |
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} |
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/** |
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* If timed poll returns non-null, the returned task is completed |
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*/ |
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public void testPoll2() { |
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ExecutorService e = Executors.newCachedThreadPool(); |
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ExecutorCompletionService ecs = new ExecutorCompletionService(e); |
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try { |
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assertNull(ecs.poll()); |
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Callable c = new StringTask(); |
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ecs.submit(c); |
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Future f = ecs.poll(SHORT_DELAY_MS, TimeUnit.MILLISECONDS); |
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if (f != null) |
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assert(f.isDone()); |
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} catch (Exception ex) { |
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unexpectedException(); |
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} finally { |
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joinPool(e); |
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} |
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} |
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} |