testreversecomparator.java

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/*
 * Copyright 1999-2004 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.Collections;
import java.util.Comparator;
import java.util.LinkedList;
import java.util.List;

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

public class TestReverseComparator extends TestComparator {

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

    public static Test suite() {
        return new TestSuite(TestReverseComparator.class);
    }

    /**
     * For the purposes of this test, return a 
     * ReverseComparator that wraps the java.util.Collections.reverseOrder()
     * Comparator.  The resulting comparator shouls
     * sort according to natural Order.  (Note: we wrap
     * a Comparator taken from the JDK so that we can
     * save a "canonical" form in CVS.
     * 
     * @return Comparator that returns "natural" order
     */
    public Comparator makeComparator() {
        return new ReverseComparator(Collections.reverseOrder());
    }

    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));
        return list;
    }

}