testnullcomparator.java

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/*
 * Copyright 2001-2004 The Apache Software Foundation
 *
 * Licensed 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.comparators;
import java.util.Comparator;
import java.util.LinkedList;
import java.util.List;

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

/**
 *  Test the NullComparator 
 *
 *  @author <a href="mailto:[e-mail]">Michael A. Smith</a>
 *  @version $Id: TestNullComparator.java,v 1.3.2.1 2004/05/22 12:14:03 scolebourne Exp $
 **/
public abstract class TestNullComparator extends TestComparator {

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

    public static Test suite() {
	TestSuite suite = new TestSuite(TestNullComparator.class.getName());
	suite.addTest(new TestSuite(TestNullComparator1.class));
	suite.addTest(new TestSuite(TestNullComparator2.class));
	return suite;
    }

    /**
     *  Test the NullComparator with nulls high, using comparable comparator
     **/
    public static class TestNullComparator1 extends TestNullComparator {

	public TestNullComparator1(String testName) {
	    super(testName);
	}

	public Comparator makeComparator() {
	    return new NullComparator();
	}
	
	public List getComparableObjectsOrdered() {
	    List list = new LinkedList();
	    list.add(new Integer(1));
	    list.add(new Integer(2));
	    list.add(new Integer(3));
	    list.add(new Integer(4));
	    list.add(new Integer(5));
	    list.add(null);
	    return list;
	}

	public String getCanonicalComparatorName(Object object) {
	    return super.getCanonicalComparatorName(object) + "1";
	}
    }

    /**
     *  Test the NullComparator with nulls low using the comparable comparator
     **/
    public static class TestNullComparator2 extends TestNullComparator {

	public TestNullComparator2(String testName) {
	    super(testName);
	}

	public Comparator makeComparator() {
	    return new NullComparator(false);
	}
	
	public List getComparableObjectsOrdered() {
	    List list = new LinkedList();
	    list.add(null);
	    list.add(new Integer(1));
	    list.add(new Integer(2));
	    list.add(new Integer(3));
	    list.add(new Integer(4));
	    list.add(new Integer(5));
	    return list;
	}

	public String getCanonicalComparatorName(Object object) {
	    return super.getCanonicalComparatorName(object) + "2";
	}
    }
}