ArrayUtilsTest.java

/*
 * 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 hivemall.utils;

import hivemall.utils.lang.ArrayUtils;

import java.util.Random;

import org.junit.Test;
import org.junit.Assert;

public class ArrayUtilsTest {

    @Test
    public void test() {
        String[] shuffled = new String[] {"1, 2, 3", "4, 5, 6", "7, 8, 9", "10, 11, 12"};
        String[] outcome = new String[] {"10, 11, 12", "1, 2, 3", "4, 5, 6", "7, 8, 9"};

        ArrayUtils.shuffle(shuffled, new Random(0L));

        for (int i = 0; i < shuffled.length; i++) {
            Assert.assertEquals(outcome[i], shuffled[i]);
        }
    }

}