001/*
002 *  jDTAUS Core Test Suite
003 *  Copyright (C) 2005 Christian Schulte
004 *  <cs@schulte.it>
005 *
006 *  This library is free software; you can redistribute it and/or
007 *  modify it under the terms of the GNU Lesser General Public
008 *  License as published by the Free Software Foundation; either
009 *  version 2.1 of the License, or any later version.
010 *
011 *  This library is distributed in the hope that it will be useful,
012 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
013 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
014 *  Lesser General Public License for more details.
015 *
016 *  You should have received a copy of the GNU Lesser General Public
017 *  License along with this library; if not, write to the Free Software
018 *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
019 *
020 */
021package org.jdtaus.core.lang.it;
022
023import junit.framework.Assert;
024import junit.framework.TestCase;
025import org.jdtaus.core.lang.ExceptionEventSource;
026
027/**
028 * Testcase for {@code ExceptionEventSource} implementations.
029 *
030 * @author <a href="mailto:cs@schulte.it">Christian Schulte</a>
031 * @version $JDTAUS: ExceptionEventSourceTest.java 8692 2012-10-01 14:16:57Z schulte $
032 */
033public abstract class ExceptionEventSourceTest extends TestCase
034{
035    //--ExceptionEventSourceTest------------------------------------------------
036
037    /**
038     * Gets the {@code ExceptionEventSource} implementation tests are performed
039     * with.
040     *
041     * @return the {@code ExceptionEventSource} implementation tests are
042     * performed with.
043     */
044    public abstract ExceptionEventSource getExceptionEventSource();
045
046    //------------------------------------------------ExceptionEventSourceTest--
047    //--Tests-------------------------------------------------------------------
048
049    /**
050     * Tests the
051     * {@link ExceptionEventSource#addExceptionListener(ExceptionListener)} and
052     * {@link ExceptionEventSource#removeExceptionListener(ExceptionListener)}
053     * methods to correctly handle {@code null} arguments by throwing a
054     * corresponding {@code NullPointerException}.
055     */
056    public void testNullArguments() throws Exception
057    {
058        assert this.getExceptionEventSource() != null;
059
060        try
061        {
062            this.getExceptionEventSource().addExceptionListener( null );
063            throw new AssertionError();
064        }
065        catch ( NullPointerException e )
066        {
067            Assert.assertNotNull( e.getMessage() );
068            System.out.println( e.toString() );
069        }
070
071        try
072        {
073            this.getExceptionEventSource().removeExceptionListener( null );
074            throw new AssertionError();
075        }
076        catch ( NullPointerException e )
077        {
078            Assert.assertNotNull( e.getMessage() );
079            System.out.println( e.toString() );
080        }
081
082    }
083
084    //-------------------------------------------------------------------Tests--
085}