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 *****************************************************************************/
010 package org.picocontainer.defaults;
011
012 import org.junit.Test;
013 import org.picocontainer.ComponentAdapter;
014 import org.picocontainer.DefaultPicoContainer;
015 import org.picocontainer.PicoCompositionException;
016 import org.picocontainer.PicoException;
017 import org.picocontainer.injectors.AbstractInjector;
018 import org.picocontainer.injectors.ConstructorInjector;
019 import org.picocontainer.monitors.AbstractComponentMonitor;
020
021 import java.io.ByteArrayOutputStream;
022 import java.io.IOException;
023 import java.io.PrintStream;
024 import java.io.PrintWriter;
025 import java.util.HashSet;
026 import java.util.List;
027 import java.util.Set;
028
029 import static org.junit.Assert.assertEquals;
030 import static org.junit.Assert.assertNull;
031 import static org.junit.Assert.assertSame;
032 import static org.junit.Assert.assertTrue;
033
034 /**
035 * Unit tests for the several PicoException classes.
036 */
037 @SuppressWarnings("serial")
038 public 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 try {
049 final Exception exception = (Exception) componentAdapter.getComponentInstance(pico, ComponentAdapter.NOTHING.class);
050 assertEquals(MESSAGE, exception.getMessage());
051 } catch (final AbstractInjector.UnsatisfiableDependenciesException ex) {
052 final Set<Object> set = new HashSet<Object>();
053 for (Object o : ex.getUnsatisfiableDependencies()) {
054 final List<Object> list = (List<Object>)o;
055 set.addAll(list);
056 }
057 assertTrue(set.contains(Throwable.class));
058 }
059 pico = new DefaultPicoContainer();
060 pico.addComponent(THROWABLE);
061 try {
062 final PicoException exception = (PicoException) componentAdapter.getComponentInstance(pico, ComponentAdapter.NOTHING.class);
063 assertSame(THROWABLE, exception.getCause());
064 } catch (final AbstractInjector.UnsatisfiableDependenciesException ex) {
065 final Set<Object> set = new HashSet<Object>();
066 for (Object o : ex.getUnsatisfiableDependencies()) {
067 final List<Object> list = (List<Object>)o;
068 set.addAll(list);
069 }
070 assertTrue(set.contains(String.class));
071 }
072 pico.addComponent(MESSAGE);
073 final PicoException exception = (PicoException) componentAdapter.getComponentInstance(pico, ComponentAdapter.NOTHING.class);
074 assertEquals(MESSAGE, exception.getMessage());
075 assertSame(THROWABLE, exception.getCause());
076 }
077
078 @Test public void testPicoInitializationException() {
079 executeTestOfStandardException(PicoCompositionException.class);
080 }
081
082 @Test public void testPicoInitializationExceptionWithDefaultConstructor() {
083 TestException e = new TestException(null);
084 assertNull(e.getMessage());
085 assertNull(e.getCause());
086 }
087
088 private static class TestException extends PicoCompositionException {
089 public TestException(final String message) {
090 super(message);
091 }
092 }
093
094 @Test public void testPrintStackTrace() throws IOException {
095 PicoException nestedException = new PicoException("Outer", new Exception("Inner")) {
096 };
097 PicoException simpleException = new PicoException("Outer") {
098 };
099 ByteArrayOutputStream out = new ByteArrayOutputStream();
100 PrintStream printStream = new PrintStream(out);
101 nestedException.printStackTrace(printStream);
102 simpleException.printStackTrace(printStream);
103 out.close();
104 assertTrue(out.toString().indexOf("Caused by:") > 0);
105 out = new ByteArrayOutputStream();
106 PrintWriter writer = new PrintWriter(out);
107 nestedException.printStackTrace(writer);
108 simpleException.printStackTrace(writer);
109 writer.flush();
110 out.close();
111 assertTrue(out.toString().indexOf("Caused by:") > 0);
112 //simpleException.printStackTrace();
113 }
114 }