Commons Collections example source code file (TestIdentityMap.java)

This example Commons Collections source code file (TestIdentityMap.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Java - Commons Collections tags/keywords

abstracttestobject, i2a, i2a, i2b, identitymap, identitymap, integer, integer, io, ioexception, iterablemap, iterator, map, map, testidentitymap, util

The Commons Collections TestIdentityMap.java source code

/*
 *  Licensed to the Apache Software Foundation (ASF) under one or more
 *  contributor license agreements.  See the NOTICE file distributed with
 *  this work for additional information regarding copyright ownership.
 *  The ASF licenses this file to You under the Apache License, Version 2.0
 *  (the "License"); you may not use this file except in compliance with
 *  the License.  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */
package org.apache.commons.collections.map;

import java.io.IOException;
import java.io.Serializable;
import java.util.Iterator;
import java.util.Map;

import junit.framework.Test;
import junit.framework.TestSuite;
import junit.textui.TestRunner;

import org.apache.commons.collections.AbstractTestObject;
import org.apache.commons.collections.IterableMap;

/**
 * JUnit tests.
 * 
 * @version $Revision: 646780 $ $Date: 2008-04-10 13:48:07 +0100 (Thu, 10 Apr 2008) $
 * 
 * @author Stephen Colebourne
 */
public class TestIdentityMap extends AbstractTestObject {
    
    private static final Integer I1A = new Integer(1);
    private static final Integer I1B = new Integer(1);
    private static final Integer I2A = new Integer(2);
    private static final Integer I2B = new Integer(2);

    public TestIdentityMap(String testName) {
        super(testName);
    }

    public static void main(String[] args) {
        TestRunner.run(suite());
    }
    
    public static Test suite() {
        return new TestSuite(TestIdentityMap.class);
//        return BulkTest.makeSuite(TestIdentityMap.class);  // causes race condition!
    }
    
    public Object makeObject() {
        return new IdentityMap();
    }
    
    public String getCompatibilityVersion() {
        return "3";
    }
    
    //-----------------------------------------------------------------------
    public void testBasics() {
        IterableMap map = new IdentityMap();
        assertEquals(0, map.size());
        
        map.put(I1A, I2A);
        assertEquals(1, map.size());
        assertSame(I2A, map.get(I1A));
        assertSame(null, map.get(I1B));
        assertEquals(true, map.containsKey(I1A));
        assertEquals(false, map.containsKey(I1B));
        assertEquals(true, map.containsValue(I2A));
        assertEquals(false, map.containsValue(I2B));
        
        map.put(I1A, I2B);
        assertEquals(1, map.size());
        assertSame(I2B, map.get(I1A));
        assertSame(null, map.get(I1B));
        assertEquals(true, map.containsKey(I1A));
        assertEquals(false, map.containsKey(I1B));
        assertEquals(false, map.containsValue(I2A));
        assertEquals(true, map.containsValue(I2B));
        
        map.put(I1B, I2B);
        assertEquals(2, map.size());
        assertSame(I2B, map.get(I1A));
        assertSame(I2B, map.get(I1B));
        assertEquals(true, map.containsKey(I1A));
        assertEquals(true, map.containsKey(I1B));
        assertEquals(false, map.containsValue(I2A));
        assertEquals(true, map.containsValue(I2B));
    }
    
    //-----------------------------------------------------------------------
    public void testHashEntry() {
        IterableMap map = new IdentityMap();
        
        map.put(I1A, I2A);
        map.put(I1B, I2A);
        
        Map.Entry entry1 = (Map.Entry) map.entrySet().iterator().next();
        Iterator it = map.entrySet().iterator();
        Map.Entry entry2 = (Map.Entry) it.next();
        Map.Entry entry3 = (Map.Entry) it.next();
        
        assertEquals(true, entry1.equals(entry2));
        assertEquals(true, entry2.equals(entry1));
        assertEquals(false, entry1.equals(entry3));
    }
    
    /**
     * Compare the current serialized form of the Map
     * against the canonical version in CVS.
     */
    public void testEmptyMapCompatibility() throws IOException, ClassNotFoundException {
        // test to make sure the canonical form has been preserved
        Map map = (Map) makeObject();
        if (map instanceof Serializable && !skipSerializedCanonicalTests()) {
            Map map2 = (Map) readExternalFormFromDisk(getCanonicalEmptyCollectionName(map));
            assertEquals("Map is empty", 0, map2.size());
        }
    }

    public void testClone() {
        IdentityMap map = new IdentityMap(10);
        map.put("1", "1");
        Map cloned = (Map) map.clone();
        assertEquals(map.size(), cloned.size());
        assertSame(map.get("1"), cloned.get("1"));
    }
    
//    public void testCreate() throws Exception {
//        Map map = new IdentityMap();
//        writeExternalFormToDisk((java.io.Serializable) map, "D:/dev/collections/data/test/IdentityMap.emptyCollection.version3.obj");
//        map = new IdentityMap();
//        map.put(I1A, I2A);
//        map.put(I1B, I2A);
//        map.put(I2A, I2B);
//        writeExternalFormToDisk((java.io.Serializable) map, "D:/dev/collections/data/test/IdentityMap.fullCollection.version3.obj");
//    }
}