001    /*****************************************************************************
002     * Copyright (c) PicoContainer Organization. All rights reserved.            *
003     * ------------------------------------------------------------------------- *
004     * The software in this package is published under the terms of the BSD      *
005     * style license a copy of which has been included with this distribution in *
006     * the LICENSE.txt file.                                                     *
007     *                                                                           *
008     * Idea by Rachel Davies, Original code by Aslak Hellesoy and Paul Hammant   *
009     *****************************************************************************/
010    
011    package org.picocontainer.defaults;
012    
013    import junit.framework.TestCase;
014    import org.picocontainer.MutablePicoContainer;
015    import org.picocontainer.PicoInitializationException;
016    import org.picocontainer.PicoRegistrationException;
017    import org.picocontainer.testmodel.DependsOnTouchable;
018    import org.picocontainer.testmodel.SimpleTouchable;
019    
020    public class DelegatingPicoContainerTestCase extends TestCase {
021        private MutablePicoContainer parent;
022        private DefaultPicoContainer child;
023    
024        public void setUp() throws PicoRegistrationException, PicoInitializationException {
025            parent = new DefaultPicoContainer();
026            child = new DefaultPicoContainer(parent);
027        }
028    
029        public void testChildGetsFromParent() {
030            parent.registerComponentImplementation(SimpleTouchable.class);
031            child.registerComponentImplementation(DependsOnTouchable.class);
032            DependsOnTouchable dependsOnTouchable = (DependsOnTouchable) child.getComponentInstance(DependsOnTouchable.class);
033    
034            assertNotNull(dependsOnTouchable);
035        }
036    
037        public void testParentDoesntGetFromChild() {
038            child.registerComponentImplementation(SimpleTouchable.class);
039            parent.registerComponentImplementation(DependsOnTouchable.class);
040            try {
041                parent.getComponentInstance(DependsOnTouchable.class);
042                fail();
043            } catch (UnsatisfiableDependenciesException e) {
044            }
045        }
046    
047        public void testChildOverridesParent() {
048            parent.registerComponentImplementation(SimpleTouchable.class);
049            child.registerComponentImplementation(SimpleTouchable.class);
050    
051            SimpleTouchable parentTouchable = (SimpleTouchable) parent.getComponentInstance(SimpleTouchable.class);
052            SimpleTouchable childTouchable = (SimpleTouchable) child.getComponentInstance(SimpleTouchable.class);
053            assertEquals(1, child.getComponentInstances().size());
054            assertNotSame(parentTouchable, childTouchable);
055        }
056    }