home | career | drupal | java | mac | mysql | perl | scala | uml | unix  

Commons Collections example source code file (TestUnboundedFifoBuffer.java)

This example Commons Collections source code file (TestUnboundedFifoBuffer.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Java - Commons Collections tags/keywords

a, a, b, b, c, c, collection, d, e, illegalargumentexception, iterator, object, unboundedfifobuffer, unboundedfifobuffer, util

The Commons Collections TestUnboundedFifoBuffer.java source code

/*
 *  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.commons.collections;

import java.util.ArrayList;
import java.util.Collection;
import java.util.Iterator;

import junit.framework.Test;

import org.apache.commons.collections.collection.AbstractTestCollection;

/**
 * Test cases for UnboundedFifoBuffer.
 * 
 * @version $Revision: 646780 $ $Date: 2008-04-10 13:48:07 +0100 (Thu, 10 Apr 2008) $
 * 
 * @author Unknown
 */
public class TestUnboundedFifoBuffer extends AbstractTestCollection {

    public TestUnboundedFifoBuffer(String n) {
        super(n);
    }

    public static Test suite() {
        return BulkTest.makeSuite(TestUnboundedFifoBuffer.class);
    }

    //-----------------------------------------------------------------------
    /**
     *  Verifies that the ArrayList has the same elements in the same 
     *  sequence as the UnboundedFifoBuffer.
     */
    public void verify() {
        super.verify();
        Iterator iterator1 = collection.iterator();
        Iterator iterator2 = confirmed.iterator();
        while (iterator2.hasNext()) {
            assertTrue(iterator1.hasNext());
            Object o1 = iterator1.next();
            Object o2 = iterator2.next();
            assertEquals(o1, o2);
        }
    }

    //-----------------------------------------------------------------------
    /**
     * Overridden because UnboundedFifoBuffer doesn't allow null elements.
     * @return false
     */
    public boolean isNullSupported() {
        return false;
    }

    /**
     * Overridden because UnboundedFifoBuffer isn't fail fast.
     * @return false
     */
    public boolean isFailFastSupported() {
        return false;
    }

    //-----------------------------------------------------------------------
    /**
     *  Returns an empty ArrayList.
     *
     *  @return an empty ArrayList
     */
    public Collection makeConfirmedCollection() {
        return new ArrayList();
    }

    /**
     *  Returns a full ArrayList.
     *
     *  @return a full ArrayList
     */
    public Collection makeConfirmedFullCollection() {
        Collection c = makeConfirmedCollection();
        c.addAll(java.util.Arrays.asList(getFullElements()));
        return c;
    }

    /**
     *  Returns an empty UnboundedFifoBuffer with a small capacity.
     *
     *  @return an empty UnboundedFifoBuffer
     */
    public Collection makeCollection() {
        return new UnboundedFifoBuffer(5);
    }

    //-----------------------------------------------------------------------
    /**
     *  Tests that UnboundedFifoBuffer removes elements in the right order.
     */
    public void testUnboundedFifoBufferRemove() {
        resetFull();
        int size = confirmed.size();
        for (int i = 0; i < size; i++) {
            Object o1 = ((UnboundedFifoBuffer)collection).remove();
            Object o2 = ((ArrayList)confirmed).remove(0);
            assertEquals("Removed objects should be equal", o1, o2);
            verify();
        }
    }

    /**
     * Tests that the constructor correctly throws an exception.
     */
    public void testConstructorException1() {
        try {
            new UnboundedFifoBuffer(0);
        } catch (IllegalArgumentException ex) {
            return;
        }
        fail();
    }
    
    /**
     * Tests that the constructor correctly throws an exception.
     */
    public void testConstructorException2() {
        try {
            new UnboundedFifoBuffer(-20);
        } catch (IllegalArgumentException ex) {
            return;
        }
        fail();
    }

    //-----------------------------------------------------------------------
    public void testInternalStateAdd() {
        UnboundedFifoBuffer test = new UnboundedFifoBuffer(2);
        assertEquals(3, test.m_buffer.length);
        assertEquals(0, test.m_head);
        assertEquals(0, test.m_tail);
        test.add("A");
        assertEquals(3, test.m_buffer.length);
        assertEquals(0, test.m_head);
        assertEquals(1, test.m_tail);
        test.add("B");
        assertEquals(3, test.m_buffer.length);
        assertEquals(0, test.m_head);
        assertEquals(2, test.m_tail);
        test.add("C");  // forces m_buffer increase
        assertEquals(5, test.m_buffer.length);
        assertEquals(0, test.m_head);
        assertEquals(3, test.m_tail);
        test.add("D");
        assertEquals(5, test.m_buffer.length);
        assertEquals(0, test.m_head);
        assertEquals(4, test.m_tail);
    }

    public void testInternalStateAddWithWrap() {
        UnboundedFifoBuffer test = new UnboundedFifoBuffer(3);
        assertEquals(4, test.m_buffer.length);
        assertEquals(0, test.m_head);
        assertEquals(0, test.m_tail);
        test.add("A");
        assertEquals(4, test.m_buffer.length);
        assertEquals(0, test.m_head);
        assertEquals(1, test.m_tail);
        test.add("B");
        assertEquals(4, test.m_buffer.length);
        assertEquals(0, test.m_head);
        assertEquals(2, test.m_tail);
        test.add("C");
        assertEquals(4, test.m_buffer.length);
        assertEquals(0, test.m_head);
        assertEquals(3, test.m_tail);
        test.remove("A");
        assertEquals(4, test.m_buffer.length);
        assertEquals(1, test.m_head);
        assertEquals(3, test.m_tail);
        test.remove("B");
        assertEquals(4, test.m_buffer.length);
        assertEquals(2, test.m_head);
        assertEquals(3, test.m_tail);
        test.add("D");
        assertEquals(4, test.m_buffer.length);
        assertEquals(2, test.m_head);
        assertEquals(0, test.m_tail);
        test.add("E");
        assertEquals(4, test.m_buffer.length);
        assertEquals(2, test.m_head);
        assertEquals(1, test.m_tail);
    }

    public void testInternalStateRemove1() {
        UnboundedFifoBuffer test = new UnboundedFifoBuffer(4);
        test.add("A");
        test.add("B");
        test.add("C");
        assertEquals(5, test.m_buffer.length);
        assertEquals(0, test.m_head);
        assertEquals(3, test.m_tail);
        
        test.remove("A");
        assertEquals(5, test.m_buffer.length);
        assertEquals(1, test.m_head);
        assertEquals(3, test.m_tail);
        
        test.add("D");
        assertEquals(5, test.m_buffer.length);
        assertEquals(1, test.m_head);
        assertEquals(4, test.m_tail);
    }

    public void testInternalStateRemove2() {
        UnboundedFifoBuffer test = new UnboundedFifoBuffer(4);
        test.add("A");
        test.add("B");
        test.add("C");
        assertEquals(5, test.m_buffer.length);
        assertEquals(0, test.m_head);
        assertEquals(3, test.m_tail);
        
        test.remove("B");
        assertEquals(5, test.m_buffer.length);
        assertEquals(0, test.m_head);
        assertEquals(2, test.m_tail);
        
        test.add("D");
        assertEquals(5, test.m_buffer.length);
        assertEquals(0, test.m_head);
        assertEquals(3, test.m_tail);
    }

    public void testInternalStateIteratorRemove1() {
        UnboundedFifoBuffer test = new UnboundedFifoBuffer(4);
        test.add("A");
        test.add("B");
        test.add("C");
        assertEquals(5, test.m_buffer.length);
        assertEquals(0, test.m_head);
        assertEquals(3, test.m_tail);
        
        Iterator it = test.iterator();
        it.next();
        it.remove();
        assertEquals(5, test.m_buffer.length);
        assertEquals(1, test.m_head);
        assertEquals(3, test.m_tail);
        
        test.add("D");
        assertEquals(5, test.m_buffer.length);
        assertEquals(1, test.m_head);
        assertEquals(4, test.m_tail);
    }

    public void testInternalStateIteratorRemove2() {
        UnboundedFifoBuffer test = new UnboundedFifoBuffer(4);
        test.add("A");
        test.add("B");
        test.add("C");
        
        Iterator it = test.iterator();
        it.next();
        it.next();
        it.remove();
        assertEquals(5, test.m_buffer.length);
        assertEquals(0, test.m_head);
        assertEquals(2, test.m_tail);
        
        test.add("D");
        assertEquals(5, test.m_buffer.length);
        assertEquals(0, test.m_head);
        assertEquals(3, test.m_tail);
    }

    public void testInternalStateIteratorRemoveWithTailAtEnd1() {
        UnboundedFifoBuffer test = new UnboundedFifoBuffer(3);
        test.add("A");
        test.add("B");
        test.add("C");
        test.remove("A");
        test.add("D");
        assertEquals(4, test.m_buffer.length);
        assertEquals(1, test.m_head);
        assertEquals(0, test.m_tail);
        
        Iterator it = test.iterator();
        assertEquals("B", it.next());
        it.remove();
        assertEquals(4, test.m_buffer.length);
        assertEquals(2, test.m_head);
        assertEquals(0, test.m_tail);
    }

    public void testInternalStateIteratorRemoveWithTailAtEnd2() {
        UnboundedFifoBuffer test = new UnboundedFifoBuffer(3);
        test.add("A");
        test.add("B");
        test.add("C");
        test.remove("A");
        test.add("D");
        assertEquals(4, test.m_buffer.length);
        assertEquals(1, test.m_head);
        assertEquals(0, test.m_tail);
        
        Iterator it = test.iterator();
        assertEquals("B", it.next());
        assertEquals("C", it.next());
        it.remove();
        assertEquals(4, test.m_buffer.length);
        assertEquals(1, test.m_head);
        assertEquals(3, test.m_tail);
    }

    public void testInternalStateIteratorRemoveWithTailAtEnd3() {
        UnboundedFifoBuffer test = new UnboundedFifoBuffer(3);
        test.add("A");
        test.add("B");
        test.add("C");
        test.remove("A");
        test.add("D");
        assertEquals(4, test.m_buffer.length);
        assertEquals(1, test.m_head);
        assertEquals(0, test.m_tail);
        
        Iterator it = test.iterator();
        assertEquals("B", it.next());
        assertEquals("C", it.next());
        assertEquals("D", it.next());
        it.remove();
        assertEquals(4, test.m_buffer.length);
        assertEquals(1, test.m_head);
        assertEquals(3, test.m_tail);
    }

    public void testInternalStateIteratorRemoveWithWrap1() {
        UnboundedFifoBuffer test = new UnboundedFifoBuffer(3);
        test.add("A");
        test.add("B");
        test.add("C");
        test.remove("A");
        test.remove("B");
        test.add("D");
        test.add("E");
        assertEquals(4, test.m_buffer.length);
        assertEquals(2, test.m_head);
        assertEquals(1, test.m_tail);
        
        Iterator it = test.iterator();
        assertEquals("C", it.next());
        it.remove();
        assertEquals(4, test.m_buffer.length);
        assertEquals(3, test.m_head);
        assertEquals(1, test.m_tail);
    }

    public void testInternalStateIteratorRemoveWithWrap2() {
        UnboundedFifoBuffer test = new UnboundedFifoBuffer(3);
        test.add("A");
        test.add("B");
        test.add("C");
        test.remove("A");
        test.remove("B");
        test.add("D");
        test.add("E");
        assertEquals(4, test.m_buffer.length);
        assertEquals(2, test.m_head);
        assertEquals(1, test.m_tail);
        
        Iterator it = test.iterator();
        assertEquals("C", it.next());
        assertEquals("D", it.next());
        it.remove();
        assertEquals(4, test.m_buffer.length);
        assertEquals(2, test.m_head);
        assertEquals(0, test.m_tail);
    }

    public void testInternalStateIteratorRemoveWithWrap3() {
        UnboundedFifoBuffer test = new UnboundedFifoBuffer(3);
        test.add("A");
        test.add("B");
        test.add("C");
        test.remove("A");
        test.remove("B");
        test.add("D");
        test.add("E");
        assertEquals(4, test.m_buffer.length);
        assertEquals(2, test.m_head);
        assertEquals(1, test.m_tail);
        
        Iterator it = test.iterator();
        assertEquals("C", it.next());
        assertEquals("D", it.next());
        assertEquals("E", it.next());
        it.remove();
        assertEquals(4, test.m_buffer.length);
        assertEquals(2, test.m_head);
        assertEquals(0, test.m_tail);
    }

}

Other Commons Collections examples (source code examples)

Here is a short list of links related to this Commons Collections TestUnboundedFifoBuffer.java source code file:

new blog posts

 

Copyright 1998-2016 Alvin Alexander, alvinalexander.com
All Rights Reserved.

A percentage of advertising revenue from
pages under the /java/jwarehouse URI on this website is
paid back to open source projects.