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
011package org.picocontainer.defaults;
012
013import static org.junit.Assert.assertEquals;
014import static org.junit.Assert.assertNotNull;
015import static org.junit.Assert.assertNotSame;
016import static org.junit.Assert.fail;
017
018import org.junit.Before;
019import org.junit.Test;
020import org.picocontainer.DefaultPicoContainer;
021import org.picocontainer.MutablePicoContainer;
022import org.picocontainer.PicoCompositionException;
023import org.picocontainer.injectors.AbstractInjector;
024import org.picocontainer.testmodel.DependsOnTouchable;
025import org.picocontainer.testmodel.SimpleTouchable;
026
027public 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}