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     * Original code by                                                          *
009     *****************************************************************************/
010    package org.picocontainer.defaults;
011    
012    import org.picocontainer.parameters.ComponentParameter;
013    import org.picocontainer.testmodel.DecoratedTouchable;
014    import org.picocontainer.testmodel.DependsOnTouchable;
015    import org.picocontainer.testmodel.SimpleTouchable;
016    import org.picocontainer.testmodel.Touchable;
017    import org.picocontainer.DefaultPicoContainer;
018    
019    import junit.framework.TestCase;
020    
021    /**
022     * @author Thomas Heller
023     * @author Aslak Hellesøy
024     * @version $Revision: 3509 $
025     */
026    public class ComponentKeysTestCase extends TestCase {
027        public void testComponensRegisteredWithClassKeyTakePrecedenceOverOthersWhenThereAreMultipleImplementations() throws Exception {
028            DefaultPicoContainer pico = new DefaultPicoContainer();
029            pico.addComponent("default", SimpleTouchable.class);
030    
031            /**
032             * By using a class as key, this should take precedence over the other Touchable
033             */
034            pico.addComponent(Touchable.class, DecoratedTouchable.class, new ComponentParameter("default"));
035    
036            Touchable touchable = pico.getComponent(Touchable.class);
037            assertEquals(DecoratedTouchable.class, touchable.getClass());
038        }
039    
040        public void testComponentAdapterResolutionIsFirstLookedForByClassKeyToTheTopOfTheContainerHierarchy() {
041            DefaultPicoContainer pico = new DefaultPicoContainer();
042            pico.addComponent("default", SimpleTouchable.class);
043    
044            // Use the List variant instead, so we get better test coverage.
045            pico.addComponent(Touchable.class, DecoratedTouchable.class, new ComponentParameter("default"));
046    
047            DefaultPicoContainer grandChild = new DefaultPicoContainer(new DefaultPicoContainer(new DefaultPicoContainer(pico)));
048    
049            Touchable touchable = grandChild.getComponent(Touchable.class);
050            assertEquals(DecoratedTouchable.class, touchable.getClass());
051    
052        }
053    
054        public void testComponentKeysFromParentCannotConfuseTheChild() throws Exception {
055            DefaultPicoContainer pico = new DefaultPicoContainer();
056            pico.addComponent("test", SimpleTouchable.class);
057    
058            DefaultPicoContainer child = new DefaultPicoContainer(pico);
059    
060            child.addComponent("test", DependsOnTouchable.class);
061    
062            DependsOnTouchable dot = (DependsOnTouchable) child.getComponent("test");
063    
064            assertNotNull(dot);
065        }
066    
067    }