    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    }