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 static org.junit.Assert.assertEquals;
014    import static org.junit.Assert.assertNotNull;
015    import static org.junit.Assert.assertNotSame;
016    import static org.junit.Assert.fail;
017    
018    import org.junit.Before;
019    import org.junit.Test;
020    import org.picocontainer.DefaultPicoContainer;
021    import org.picocontainer.MutablePicoContainer;
022    import org.picocontainer.PicoCompositionException;
023    import org.picocontainer.injectors.AbstractInjector;
024    import org.picocontainer.testmodel.DependsOnTouchable;
025    import org.picocontainer.testmodel.SimpleTouchable;
026    
027    public class DelegatingPicoContainerTestCase {
028        private MutablePicoContainer parent;
029        private DefaultPicoContainer child;
030    
031        @Before
032        public void setUp() throws PicoCompositionException {
033            parent = new DefaultPicoContainer();
034            child = new DefaultPicoContainer(parent);
035        }
036    
037        @Test public void testChildGetsFromParent() {
038            parent.addComponent(SimpleTouchable.class);
039            child.addComponent(DependsOnTouchable.class);
040            DependsOnTouchable dependsOnTouchable = child.getComponent(DependsOnTouchable.class);
041    
042            assertNotNull(dependsOnTouchable);
043        }
044    
045        @Test public void testParentDoesntGetFromChild() {
046            child.addComponent(SimpleTouchable.class);
047            parent.addComponent(DependsOnTouchable.class);
048            try {
049                parent.getComponent(DependsOnTouchable.class);
050                fail();
051            } catch (AbstractInjector.UnsatisfiableDependenciesException e) {
052            }
053        }
054    
055        @Test public void testChildOverridesParent() {
056            parent.addComponent(SimpleTouchable.class);
057            child.addComponent(SimpleTouchable.class);
058    
059            SimpleTouchable parentTouchable = parent.getComponent(SimpleTouchable.class);
060            SimpleTouchable childTouchable = child.getComponent(SimpleTouchable.class);
061            assertEquals(1, child.getComponents().size());
062            assertNotSame(parentTouchable, childTouchable);
063        }
064    }