Commons Collections example source code file (TestPredicatedList.java)

This example Commons Collections source code file (TestPredicatedList.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

arraylist, arraylist, collection, illegalargumentexception, integer, integer, list, list, object, predicate, predicate, string, test, testpredicatedlist, util

The Commons Collections TestPredicatedList.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.list;

import java.util.ArrayList;
import java.util.List;

import junit.framework.Test;
import junit.framework.TestSuite;

import org.apache.commons.collections.Predicate;
import org.apache.commons.collections.PredicateUtils;

/**
 * Extension of {@link TestList} for exercising the 
 * {@link PredicatedList} implementation.
 *
 * @since Commons Collections 3.0
 * @version $Revision: 646780 $ $Date: 2008-04-10 13:48:07 +0100 (Thu, 10 Apr 2008) $
 * 
 * @author Phil Steitz
 */
public class TestPredicatedList extends AbstractTestList {
    
    public TestPredicatedList(String testName) {
        super(testName);
    }
    
    public static Test suite() {
        return new TestSuite(TestPredicatedList.class);
    }
    
    public static void main(String args[]) {
        String[] testCaseName = { TestPredicatedList.class.getName()};
        junit.textui.TestRunner.main(testCaseName);
    }
    
 //-------------------------------------------------------------------
    
    protected Predicate truePredicate = PredicateUtils.truePredicate();
    
    protected List decorateList(List list, Predicate predicate) {
        return PredicatedList.decorate(list, predicate);
    }
    
    public List makeEmptyList() {
        return decorateList(new ArrayList(), truePredicate);
    }
    
    public Object[] getFullElements() {
        return new Object[] {"1", "3", "5", "7", "2", "4", "6"};
    }
    
//--------------------------------------------------------------------   
    
     protected Predicate testPredicate =  
        new Predicate() {
            public boolean evaluate(Object o) {
                return o instanceof String;
            }
        };      
    
    public List makeTestList() {
        return decorateList(new ArrayList(), testPredicate);
    }
    
    public void testIllegalAdd() {
        List list = makeTestList();
        Integer i = new Integer(3);
        try {
            list.add(i);
            fail("Integer should fail string predicate.");
        } catch (IllegalArgumentException e) {
            // expected
        }
        assertTrue("Collection shouldn't contain illegal element", 
         !list.contains(i));   
    }

    public void testIllegalAddAll() {
        List list = makeTestList();
        List elements = new ArrayList();
        elements.add("one");
        elements.add("two");
        elements.add(new Integer(3));
        elements.add("four");
        try {
            list.addAll(0,elements);
            fail("Integer should fail string predicate.");
        } catch (IllegalArgumentException e) {
            // expected
        }
        assertTrue("List shouldn't contain illegal element", 
         !list.contains("one"));   
        assertTrue("List shouldn't contain illegal element", 
         !list.contains("two"));   
        assertTrue("List shouldn't contain illegal element", 
         !list.contains(new Integer(3)));   
        assertTrue("List shouldn't contain illegal element", 
         !list.contains("four"));   
    }
    
    public void testIllegalSet() {
        List list = makeTestList();
        try {
            list.set(0,new Integer(3));
            fail("Integer should fail string predicate.");
        } catch (IllegalArgumentException e) {
            // expected
        }
    }
    
    public void testLegalAddAll() {
        List list = makeTestList();
        list.add("zero");
        List elements = new ArrayList();
        elements.add("one");
        elements.add("two");
        elements.add("three");
        list.addAll(1,elements);
        assertTrue("List should contain legal element", 
         list.contains("zero"));   
        assertTrue("List should contain legal element", 
         list.contains("one"));   
        assertTrue("List should contain legal element", 
         list.contains("two"));   
        assertTrue("List should contain legal element", 
         list.contains("three"));   
    }       

    public String getCompatibilityVersion() {
        return "3.1";
    }

//    public void testCreate() throws Exception {
//        resetEmpty();
//        writeExternalFormToDisk((java.io.Serializable) collection, "D:/dev/collections/data/test/PredicatedList.emptyCollection.version3.1.obj");
//        resetFull();
//        writeExternalFormToDisk((java.io.Serializable) collection, "D:/dev/collections/data/test/PredicatedList.fullCollection.version3.1.obj");
//    }

}