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Commons Collections example source code file (TestBoundedFifoBuffer2.java)

This example Commons Collections source code file (TestBoundedFifoBuffer2.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

boundedcollection, boundedcollection, boundedfifobuffer, boundedfifobuffer, bufferoverflow, bufferoverflow, bufferoverflowexception, collection, test, testboundedfifobuffer, testboundedfifobuffer2, testboundedfifobuffer2, util

The Commons Collections TestBoundedFifoBuffer2.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.buffer;

import java.util.Arrays;
import java.util.Collection;

import junit.framework.Test;

import org.apache.commons.collections.BoundedCollection;
import org.apache.commons.collections.BufferOverflowException;
import org.apache.commons.collections.BulkTest;

/**
 * Runs tests against a full BoundedFifoBuffer, since many of the algorithms
 * differ depending on whether the fifo is full or not.
 * 
 * @version $Revision: 646780 $ $Date: 2008-04-10 13:48:07 +0100 (Thu, 10 Apr 2008) $
 * 
 * @author Unknown
 */
public class TestBoundedFifoBuffer2 extends TestBoundedFifoBuffer {

    public TestBoundedFifoBuffer2(String n) {
        super(n);
    }

    public static Test suite() {
        return BulkTest.makeSuite(TestBoundedFifoBuffer2.class);
    }

    /**
     *  Returns a BoundedFifoBuffer that's filled to capacity.
     *  Any attempt to add to the returned buffer will result in a 
     *  BufferOverflowException.
     *
     *  @return a full BoundedFifoBuffer
     */
    public Collection makeFullCollection() {
        return new BoundedFifoBuffer(Arrays.asList(getFullElements()));
    }


    /**
     *  Overridden to skip the add tests.  All of them would fail with a 
     *  BufferOverflowException.
     *
     *  @return false
     */
    public boolean isAddSupported() {
        return false;
    }


    /**
     *  Overridden because the add operations raise BufferOverflowException
     *  instead of UnsupportedOperationException.
     */
    public void testUnsupportedAdd() {
    }


    /**
     *  Tests to make sure the add operations raise BufferOverflowException.
     */
    public void testBufferOverflow() {
        resetFull();
        try {
            collection.add(getOtherElements()[0]);
            fail("add should raise BufferOverflow.");
        } catch (BufferOverflowException e) {
            // expected
        }
        verify();

        try {
            collection.addAll(Arrays.asList(getOtherElements()));
            fail("addAll should raise BufferOverflow.");
        } catch (BufferOverflowException e) {
            // expected
        }
        verify();
    }

    /**
     * Tests is full
     */
    public void testIsFull() {
        resetFull();
        assertEquals(true, ((BoundedCollection) collection).isFull());
        ((BoundedFifoBuffer) collection).remove();
        assertEquals(false, ((BoundedCollection) collection).isFull());
        ((BoundedFifoBuffer) collection).add("jj");
        assertEquals(true, ((BoundedCollection) collection).isFull());
    }

    /**
     * Tests max size
     */
    public void testMaxSize() {
        resetFull();
        assertEquals(getFullElements().length, ((BoundedCollection) collection).maxSize());
        ((BoundedFifoBuffer) collection).remove();
        assertEquals(getFullElements().length, ((BoundedCollection) collection).maxSize());
        ((BoundedFifoBuffer) collection).add("jj");
        assertEquals(getFullElements().length, ((BoundedCollection) collection).maxSize());
    }

}

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