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/* |
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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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|
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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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|
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public class CyclicBarrierTest extends TestCase{ |
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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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} |
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|
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|
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public static Test suite() { |
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return new TestSuite(CyclicBarrierTest.class); |
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} |
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|
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private static long SHORT_DELAY_MS = 100; |
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private static long MEDIUM_DELAY_MS = 1000; |
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private static long LONG_DELAY_MS = 10000; |
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|
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public void testConstructor1(){ |
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try{ |
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new CyclicBarrier(-1, (Runnable)null); |
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fail("should throw"); |
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} catch(IllegalArgumentException e){} |
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} |
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|
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public void testConstructor2(){ |
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try{ |
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new CyclicBarrier(-1); |
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fail("should throw"); |
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} catch(IllegalArgumentException e){} |
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} |
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|
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public void testConstructor3(){ |
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CyclicBarrier b = new CyclicBarrier(2); |
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assertEquals(2, b.getParties()); |
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assertEquals(0, b.getNumberWaiting()); |
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} |
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|
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public void testSingleParty() { |
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try { |
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CyclicBarrier b = new CyclicBarrier(1); |
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assertEquals(1, b.getParties()); |
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assertEquals(0, b.getNumberWaiting()); |
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b.await(); |
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b.await(); |
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assertEquals(0, b.getNumberWaiting()); |
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} |
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catch(Exception e) { |
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fail("unexpected exception"); |
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} |
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} |
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|
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private volatile int countAction; |
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private class MyAction implements Runnable { |
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public void run() { ++countAction; } |
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} |
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|
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public void testBarrierAction() { |
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try { |
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countAction = 0; |
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CyclicBarrier b = new CyclicBarrier(1, new MyAction()); |
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assertEquals(1, b.getParties()); |
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assertEquals(0, b.getNumberWaiting()); |
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b.await(); |
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b.await(); |
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assertEquals(0, b.getNumberWaiting()); |
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assertEquals(countAction, 2); |
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} |
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catch(Exception e) { |
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fail("unexpected exception"); |
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} |
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} |
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|
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|
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public void testTwoParties(){ |
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final CyclicBarrier b = new CyclicBarrier(2); |
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Thread t = new Thread(new Runnable() { |
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public void run(){ |
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try { |
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b.await(); |
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b.await(); |
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b.await(); |
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b.await(); |
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} catch(Exception e){ |
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fail("unexpected exception"); |
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}}}); |
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|
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try { |
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t.start(); |
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b.await(); |
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b.await(); |
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b.await(); |
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b.await(); |
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t.join(); |
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} catch(Exception e){ |
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fail("unexpected exception"); |
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} |
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} |
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|
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|
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public void testAwait1_Interrupted_BrokenBarrier(){ |
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final CyclicBarrier c = new CyclicBarrier(3); |
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Thread t1 = new Thread(new Runnable() { |
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public void run(){ |
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try{ |
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c.await(); |
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fail("should throw"); |
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} catch(InterruptedException success){} |
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catch(Exception b){ |
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fail("should throw IE"); |
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} |
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} |
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}); |
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Thread t2 = new Thread(new Runnable(){ |
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public void run(){ |
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try{ |
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c.await(); |
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fail("should throw"); |
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} catch(BrokenBarrierException success){ |
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} catch(Exception i){ |
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fail("should throw BBE"); |
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} |
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} |
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}); |
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try { |
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t1.start(); |
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t2.start(); |
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Thread.sleep(SHORT_DELAY_MS); |
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t1.interrupt(); |
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t1.join(); |
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t2.join(); |
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} catch(InterruptedException e){ |
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fail("unexpected exception"); |
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} |
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} |
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|
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public void testAwait2_Interrupted_BrokenBarrier(){ |
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final CyclicBarrier c = new CyclicBarrier(3); |
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Thread t1 = new Thread(new Runnable() { |
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public void run(){ |
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try{ |
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c.await(MEDIUM_DELAY_MS, TimeUnit.MILLISECONDS); |
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fail("should throw"); |
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} catch(InterruptedException success){ |
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} catch(Exception b){ |
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fail("should throw IE"); |
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} |
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} |
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}); |
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Thread t2 = new Thread(new Runnable(){ |
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public void run(){ |
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try{ |
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c.await(MEDIUM_DELAY_MS, TimeUnit.MILLISECONDS); |
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fail("should throw"); |
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} catch(BrokenBarrierException success){ |
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} catch(Exception i){ |
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fail("should throw BBE"); |
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} |
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} |
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}); |
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try { |
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t1.start(); |
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t2.start(); |
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Thread.sleep(SHORT_DELAY_MS); |
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t1.interrupt(); |
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t1.join(); |
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t2.join(); |
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} catch(InterruptedException e){ |
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fail("unexpected exception"); |
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} |
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} |
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|
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public void testAwait3_TimeOutException(){ |
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final CyclicBarrier c = new CyclicBarrier(2); |
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Thread t = new Thread(new Runnable() { |
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public void run(){ |
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try{ |
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c.await(SHORT_DELAY_MS, TimeUnit.MILLISECONDS); |
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fail("should throw"); |
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} catch(TimeoutException success){ |
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} catch(Exception b){ |
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fail("should throw TOE"); |
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|
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} |
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} |
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}); |
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try { |
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t.start(); |
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t.join(); |
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} catch(InterruptedException e){ |
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fail("unexpected exception"); |
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} |
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} |
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|
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} |
