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 junit.framework.TestCase;
013    import org.picocontainer.Parameter;
014    import org.picocontainer.testmodel.DecoratedTouchable;
015    import org.picocontainer.testmodel.SimpleTouchable;
016    import org.picocontainer.testmodel.Touchable;
017    import org.picocontainer.testmodel.DependsOnTouchable;
018    
019    import java.util.Collections;
020    
021    /**
022     * @author Thomas Heller
023     * @author Aslak Hellesøy
024     * @version $Revision: 2306 $
025     */
026    public class ComponentKeysTestCase extends TestCase {
027        public void testComponensRegisteredWithClassKeyTakePrecedenceOverOthersWhenThereAreMultipleImplementations() throws Exception {
028            DefaultPicoContainer pico = new DefaultPicoContainer();
029            pico.registerComponentImplementation("default", SimpleTouchable.class);
030    
031            /**
032             * By using a class as key, this should take precedence over the other Touchable
033             */
034            pico.registerComponentImplementation(Touchable.class, DecoratedTouchable.class, new Parameter[]{
035                                new ComponentParameter("default")
036                        });
037    
038            Touchable touchable = (Touchable) pico.getComponentInstanceOfType(Touchable.class);
039            assertEquals(DecoratedTouchable.class, touchable.getClass());
040        }
041    
042        public void testComponentAdapterResolutionIsFirstLookedForByClassKeyToTheTopOfTheContainerHierarchy() {
043            DefaultPicoContainer pico = new DefaultPicoContainer();
044            pico.registerComponentImplementation("default", SimpleTouchable.class);
045    
046            // Use the List variant instead, so we get better test coverage.
047            pico.registerComponentImplementation(Touchable.class, DecoratedTouchable.class, Collections.singletonList(new ComponentParameter("default")));
048    
049            DefaultPicoContainer grandChild = new DefaultPicoContainer(new DefaultPicoContainer(new DefaultPicoContainer(pico)));
050    
051            Touchable touchable = (Touchable) grandChild.getComponentInstanceOfType(Touchable.class);
052            assertEquals(DecoratedTouchable.class, touchable.getClass());
053    
054        }
055    
056        public void testComponentKeysFromParentCannotConfuseTheChild() throws Exception {
057            DefaultPicoContainer pico = new DefaultPicoContainer();
058            pico.registerComponentImplementation("test", SimpleTouchable.class);
059    
060            DefaultPicoContainer child = new DefaultPicoContainer(pico);
061    
062            child.registerComponentImplementation("test", DependsOnTouchable.class);
063    
064            DependsOnTouchable dot = (DependsOnTouchable) child.getComponentInstance("test");
065    
066            assertNotNull(dot);
067        }
068    
069    }