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 Joerg Schaible                                           *
009 *****************************************************************************/
010package org.picocontainer.defaults;
011
012import org.junit.Test;
013import org.picocontainer.ComponentAdapter;
014import org.picocontainer.DefaultPicoContainer;
015import org.picocontainer.PicoCompositionException;
016import org.picocontainer.PicoException;
017import org.picocontainer.injectors.AbstractInjector;
018import org.picocontainer.injectors.ConstructorInjector;
019import org.picocontainer.monitors.AbstractComponentMonitor;
020
021import java.io.ByteArrayOutputStream;
022import java.io.IOException;
023import java.io.PrintStream;
024import java.io.PrintWriter;
025import java.util.HashSet;
026import java.util.List;
027import java.util.Set;
028
029import static org.junit.Assert.assertEquals;
030import static org.junit.Assert.assertNull;
031import static org.junit.Assert.assertSame;
032import static org.junit.Assert.assertTrue;
033
034/**
035 * Unit tests for the several PicoException classes.
036 */
037@SuppressWarnings("serial")
038public class PicoExceptionsTestCase {
039
040    final static public String MESSAGE = "Message of the exception";
041    final static public Throwable THROWABLE = new Throwable();
042
043    @SuppressWarnings({ "unchecked" })
044    final void executeTestOfStandardException(final Class clazz) {
045        final ComponentAdapter componentAdapter = new ConstructorInjector(clazz, clazz, null, new AbstractComponentMonitor(), false, false);
046        DefaultPicoContainer pico = new DefaultPicoContainer();
047        pico.addComponent(MESSAGE);
048        Exception exception = (Exception) componentAdapter.getComponentInstance(pico, ComponentAdapter.NOTHING.class);
049            assertEquals(MESSAGE, exception.getMessage());
050        pico = new DefaultPicoContainer();
051        pico.addComponent(THROWABLE);
052        exception = (PicoException) componentAdapter.getComponentInstance(pico, ComponentAdapter.NOTHING.class);
053        assertSame(THROWABLE, exception.getCause());
054        pico.addComponent(MESSAGE);
055        exception = (PicoException) componentAdapter.getComponentInstance(pico, ComponentAdapter.NOTHING.class);
056        assertEquals(MESSAGE, exception.getMessage());
057        assertSame(THROWABLE, exception.getCause());
058    }
059
060    @Test public void testPicoInitializationException() {
061        executeTestOfStandardException(PicoCompositionException.class);
062    }
063
064    @Test public void testPicoInitializationExceptionWithDefaultConstructor() {
065        TestException e = new TestException(null);
066        assertNull(e.getMessage());
067        assertNull(e.getCause());
068    }
069
070    private static class TestException extends PicoCompositionException {
071        public TestException(final String message) {
072            super(message);
073        }
074    }
075
076    @Test public void testPrintStackTrace() throws IOException {
077        PicoException nestedException = new PicoException("Outer", new Exception("Inner")) {
078        };
079        PicoException simpleException = new PicoException("Outer") {
080        };
081        ByteArrayOutputStream out = new ByteArrayOutputStream();
082        PrintStream printStream = new PrintStream(out);
083        nestedException.printStackTrace(printStream);
084        simpleException.printStackTrace(printStream);
085        out.close();
086        assertTrue(out.toString().indexOf("Caused by:") > 0);
087        out = new ByteArrayOutputStream();
088        PrintWriter writer = new PrintWriter(out);
089        nestedException.printStackTrace(writer);
090        simpleException.printStackTrace(writer);
091        writer.flush();
092        out.close();
093        assertTrue(out.toString().indexOf("Caused by:") > 0);
094        //simpleException.printStackTrace();
095    }
096}