ComparatorUtilsTest.java

/*
 * Copyright 2014 Red Hat, Inc. and/or its affiliates.
 *
 * 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.dashbuilder.comparator;

import java.util.Arrays;
import java.util.Collections;
import java.util.Comparator;
import java.util.List;

import org.junit.Test;

import static org.fest.assertions.api.Assertions.*;

public class ComparatorUtilsTest {

    Comparator comparator = new Comparator() {
        public int compare(Object o1, Object o2) {
            return ComparatorUtils.compare(o1, o2, -1);
        }
    };

    @Test
    public void testString() throws Exception {
        String[] stringArray = new String[]{"3", "4", "1"};
        List stringList = Arrays.asList(stringArray);
        Collections.sort(stringList, comparator);
        assertThat(stringList.get(0)).isEqualTo("4");
        assertThat(stringList.get(1)).isEqualTo("3");
        assertThat(stringList.get(2)).isEqualTo("1");
    }

    @Test
    public void testLong() throws Exception {
        Long a=new Long(3), b=new Long(2), c=new Long(4);
        Long[] longArray = new Long[]{a,b,c};
        List longList = Arrays.asList(longArray);
        Collections.sort(longList, comparator);
        assertThat(longList.get(0)).isEqualTo(c);
        assertThat(longList.get(1)).isEqualTo(a);
        assertThat(longList.get(2)).isEqualTo(b);
    }

    @Test
    public void testBoolean() throws Exception {
        Boolean[] booleanArray = new Boolean[]{Boolean.FALSE, Boolean.TRUE, Boolean.FALSE};
        List booleanList = Arrays.asList(booleanArray);
        Collections.sort(booleanList, comparator);
        assertThat(booleanList.get(0)).isEqualTo(Boolean.TRUE);
        assertThat(booleanList.get(1)).isEqualTo(Boolean.FALSE);
        assertThat(booleanList.get(2)).isEqualTo(Boolean.FALSE);
    }

    @Test
    public void testCollection() throws Exception {
        List collection1 = Arrays.asList(new String[]{"A"});
        List collection2 = Arrays.asList(new String[]{"B"});
        int result = comparator.compare(collection1, collection2);
        assertThat(result).isEqualTo(1);
    }
}