eagle-core/eagle-common/src/test/java/org/apache/eagle/common/TestCircularArrayList.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 org.apache.eagle.common;

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

public class TestCircularArrayList {

    @Test
    public void testAddAndRemove() {
        Long[] array = new Long[5];
        CircularArrayList<Long> list = new CircularArrayList<Long>(array);

        for (long i = 0; i < 5; ++i) {
            list.add(i);
            Assert.assertEquals((Long) i, array[(int) i]);
            Assert.assertTrue(list.contains(i));
            Assert.assertEquals(i, list.find(i));
        }
        Assert.assertFalse(list.contains(6L));
        Exception e = null;
        try {
            list.add((long) 5);
        } catch (Exception ex) {
            e = ex;
        }
        Assert.assertNotNull(e);
        Assert.assertEquals(0, list.tail());
        Assert.assertEquals(0, list.head());
        Assert.assertEquals(5, list.size());
        Assert.assertTrue(list.isFull());
        Long v = list.remove(1);
        Assert.assertEquals((Long) 1L, v);
        Assert.assertEquals(4, list.size());
        Assert.assertEquals(1, list.head());
        Assert.assertEquals(0, list.tail());
        list.add((long) 5);
        Assert.assertEquals(5, list.size());
        Assert.assertEquals(1, list.head());
        Assert.assertEquals(1, list.tail());
        Assert.assertEquals((Long) 0L, list.remove(0));
        Assert.assertEquals(2, list.head());
        Assert.assertEquals(1, list.tail());
        Assert.assertEquals((Long) 2L, list.remove(0));
        Assert.assertEquals(3, list.head());
        Assert.assertEquals(1, list.tail());
        Assert.assertEquals((Long) 3L, list.remove(0));
        Assert.assertEquals(4, list.head());
        Assert.assertEquals(1, list.tail());
        Assert.assertEquals((Long) 4L, list.remove(0));
        Assert.assertEquals(0, list.head());
        Assert.assertEquals(1, list.tail());
        Assert.assertEquals((Long) 5L, list.remove(0));
        Assert.assertEquals(1, list.head());
        Assert.assertEquals(1, list.tail());
        Assert.assertTrue(list.isEmpty());
        Assert.assertFalse(list.isFull());
    }
}