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 package org.picocontainer.visitors;
009
010 import java.util.ArrayList;
011 import java.util.HashSet;
012 import java.util.List;
013 import java.util.Set;
014
015 import junit.framework.TestCase;
016
017 import org.picocontainer.ComponentAdapter;
018 import org.picocontainer.MutablePicoContainer;
019 import org.picocontainer.Parameter;
020 import org.picocontainer.PicoContainer;
021 import org.picocontainer.PicoVisitor;
022 import org.picocontainer.DefaultPicoContainer;
023 import org.picocontainer.lifecycle.NullLifecycleStrategy;
024 import org.picocontainer.monitors.NullComponentMonitor;
025 import org.picocontainer.injectors.ConstructorInjector;
026 import org.picocontainer.parameters.ConstantParameter;
027 import org.picocontainer.visitors.TraversalCheckingVisitor;
028 import org.picocontainer.injectors.SetterInjector;
029
030 /**
031 * @author Michael Rimov
032 */
033 public class TraversalCheckingVisitorTestCase extends TestCase {
034
035 private MutablePicoContainer pico;
036
037 private MutablePicoContainer child;
038
039 private ComponentAdapter parentAdapter;
040
041 private ComponentAdapter childAdapter;
042
043 protected void setUp() throws Exception {
044 super.setUp();
045
046 pico = new DefaultPicoContainer();
047 SetterInjector componentAdapter = new SetterInjector(StringBuffer.class, StringBuffer.class,
048 null, new NullComponentMonitor(), new NullLifecycleStrategy());
049 parentAdapter = pico.addAdapter(componentAdapter).getComponentAdapter(StringBuffer.class, null);
050 child = pico.makeChildContainer();
051 ConstructorInjector adapter = new ConstructorInjector(ArrayList.class, ArrayList.class, new Parameter[] {new ConstantParameter(3)}, new NullComponentMonitor(), new NullLifecycleStrategy());
052 childAdapter = child.addAdapter(adapter).getComponentAdapter(ArrayList.class, null);
053 }
054
055 protected void tearDown() throws Exception {
056 super.tearDown();
057 child = null;
058 pico = null;
059 parentAdapter = null;
060 childAdapter = null;
061 }
062
063 public void testVisitComponentAdapter() {
064 final int numExpectedComponentAdapters = 2;
065 final List<ComponentAdapter> allAdapters = new ArrayList<ComponentAdapter>();
066
067 Set<ComponentAdapter> knownAdapters = new HashSet<ComponentAdapter>();
068 knownAdapters.add(parentAdapter);
069 knownAdapters.add(childAdapter);
070
071 PicoVisitor containerCollector = new TraversalCheckingVisitor() {
072 public void visitComponentAdapter(ComponentAdapter adapter) {
073 super.visitComponentAdapter(adapter); //Calls checkTraversal for us.
074 allAdapters.add(adapter);
075 }
076 };
077 containerCollector.traverse(pico);
078
079 assertEquals(numExpectedComponentAdapters, allAdapters.size());
080
081 for (ComponentAdapter allAdapter : allAdapters) {
082 boolean knownAdapter = knownAdapters.remove(allAdapter);
083 assertTrue("Encountered unknown adapter in collection: " + allAdapters.toString(), knownAdapter);
084 }
085
086 assertTrue("All adapters should match known adapters.", knownAdapters.size() == 0);
087 }
088
089 public void testVisitContainer() {
090 final List<PicoContainer> allContainers = new ArrayList<PicoContainer>();
091 final int expectedNumberOfContainers = 2;
092
093 PicoVisitor containerCollector = new TraversalCheckingVisitor() {
094 public void visitContainer(PicoContainer pico) {
095 super.visitContainer(pico); //Calls checkTraversal for us.
096 allContainers.add(pico);
097 }
098 };
099
100 containerCollector.traverse(pico);
101
102 assertTrue(allContainers.size() == expectedNumberOfContainers);
103
104 Set<MutablePicoContainer> knownContainers = new HashSet<MutablePicoContainer>();
105 knownContainers.add(pico);
106 knownContainers.add(child);
107 for (PicoContainer oneContainer : allContainers) {
108 boolean knownContainer = knownContainers.remove(oneContainer);
109 assertTrue("Found a picocontainer that wasn't previously expected.", knownContainer);
110 }
111
112 assertTrue("All containers must match what is returned by traversal.",
113 knownContainers.size() == 0);
114
115 }
116
117
118 public void testVisitParameter() {
119 final List allParameters = new ArrayList();
120
121 PicoVisitor containerCollector = new TraversalCheckingVisitor() {
122 public void visitParameter(Parameter param) {
123 super.visitParameter(param); //Calls checkTraversal for us.
124 allParameters.add(param);
125 }
126 };
127
128 containerCollector.traverse(pico);
129
130 assertTrue(allParameters.size() == 1);
131 assertTrue(allParameters.get(0) instanceof ConstantParameter);
132 assertTrue( ( (ConstantParameter) allParameters.get(0)).resolveInstance(null, null, null, null) instanceof Integer);
133 assertEquals(3, ( (Integer) ( (ConstantParameter) allParameters.get(0)).resolveInstance(null, null,
134 null, null)).intValue());
135 }
136
137 }