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/*
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* Angkor Web Framework
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*
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* Distributable under LGPL license.
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* See terms of license at gnu.org.
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*/
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package com.tirsen.angkor.test.unit;
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import junit.framework.TestCase;
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import com.tirsen.angkor.Multicaster;
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/**
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* <!-- $Id: MulticasterTest.java,v 1.2 2002/10/13 13:37:26 tirsen Exp $ -->
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*
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* @author $Author: tirsen $
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* @version $Revision: 1.2 $
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*/
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public class MulticasterTest extends TestCase
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{
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public MulticasterTest(String s)
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{
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super(s);
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}
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public static interface MulticastedInterface
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{
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Object method() throws Exception;
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}
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public static class MulticastedInterfaceImpl implements MulticastedInterface
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{
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private boolean called;
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public Object method()
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{
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called = true;
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System.out.println(this + " received a method call!");
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return new Object();
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}
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public void assertCalled()
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{
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assertTrue(called);
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}
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public void assertNotCalled()
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{
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assertFalse(called);
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}
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public void reset()
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{
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called = false;
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}
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}
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public void testMulticaster() throws Exception
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{
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MulticastedInterface multicast = (MulticastedInterface) Multicaster.create(MulticastedInterface.class);
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assertTrue("multicaster was not empty at creation", Multicaster.isEmpty(multicast));
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MulticastedInterfaceImpl impl1 = new MulticastedInterfaceImpl();
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Multicaster.add(multicast, impl1);
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assertNull("multicaster returned something from method-call", multicast.method());
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impl1.assertCalled();
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MulticastedInterfaceImpl impl2 = new MulticastedInterfaceImpl();
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MulticastedInterfaceImpl impl3 = new MulticastedInterfaceImpl();
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Multicaster.add(multicast, impl2);
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Multicaster.add(multicast, impl3);
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assertNull("multicaster returned something from method-call", multicast.method());
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impl2.assertCalled();
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impl3.assertCalled();
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impl3.reset();
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Multicaster.remove(multicast, impl3);
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multicast.method();
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impl3.assertNotCalled();
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}
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/**
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* Tests thread-safety, one implementation modifies the multicaster while being multicasted.
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*/
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public void testThreadSafety() throws Exception
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{
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final MulticastedInterface multicast = (MulticastedInterface) Multicaster.create(MulticastedInterface.class);
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MulticastedInterface modifyingImpl = new MulticastedInterface()
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{
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public Object method()
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{
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return Multicaster.remove(multicast, this);
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}
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};
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Multicaster.add(multicast, modifyingImpl);
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Multicaster.add(multicast, new MulticastedInterfaceImpl());
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multicast.method();
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}
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public void testExceptions()
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{
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MulticastedInterface errorImpl = new MulticastedInterface()
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{
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public Object method()
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{
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throw new Error();
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}
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};
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MulticastedInterface multicast = (MulticastedInterface) Multicaster.create(MulticastedInterface.class);
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Multicaster.add(multicast, errorImpl);
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try
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{
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multicast.method();
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}
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catch (Throwable e)
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{
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assertTrue(e instanceof Error);
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}
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MulticastedInterface runtimeExceptionImpl = new MulticastedInterface()
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{
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public Object method()
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{
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throw new RuntimeException();
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}
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};
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multicast = (MulticastedInterface) Multicaster.create(MulticastedInterface.class);
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Multicaster.add(multicast, runtimeExceptionImpl);
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try
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{
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multicast.method();
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}
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catch (Throwable e)
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{
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assertTrue(e instanceof RuntimeException);
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}
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MulticastedInterface exceptionImpl = new MulticastedInterface()
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{
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public Object method() throws Exception
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{
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throw new Exception();
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}
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};
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multicast = (MulticastedInterface) Multicaster.create(MulticastedInterface.class);
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Multicaster.add(multicast, exceptionImpl);
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try
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{
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multicast.method();
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}
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catch (Throwable e)
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{
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assertTrue(e instanceof Exception);
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}
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}
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public void testNull()
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{
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assertTrue("isEmpty does not handle null", Multicaster.isEmpty(null));
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168
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}
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169
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}
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170
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