Commons Collections example source code file (TestAbstractLinkedList.java)

This example Commons Collections source code file (TestAbstractLinkedList.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

abstractlinkedlist, abstractlinkedlist, abstracttestlist, expecting, expecting, indexoutofboundsexception, indexoutofboundsexception, object, object, string, testabstractlinkedlist, unsupportedoperationexception, util

The Commons Collections TestAbstractLinkedList.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.list;

import java.util.Arrays;

/**
 * Test case for {@link AbstractLinkedList}.
 * 
 * @version $Revision: 646780 $ $Date: 2008-04-10 13:48:07 +0100 (Thu, 10 Apr 2008) $
 * 
 * @author Rich Dougherty
 * @author David Hay
 * @author Phil Steitz
 */
public abstract class TestAbstractLinkedList extends AbstractTestList {
    
    public TestAbstractLinkedList(String testName) {
        super(testName);
    }

    //-----------------------------------------------------------------------    
    public void testRemoveFirst() {
        resetEmpty();
        AbstractLinkedList list = (AbstractLinkedList) collection;
        if (isRemoveSupported() == false) {
            try {
                list.removeFirst();
            } catch (UnsupportedOperationException ex) {}
        } 
        
        list.addAll( Arrays.asList( new String[]{"value1", "value2"}));
        assertEquals( "value1", list.removeFirst() );
        checkNodes();
        list.addLast( "value3");
        checkNodes();
        assertEquals( "value2", list.removeFirst() );
        assertEquals( "value3", list.removeFirst() );
        checkNodes();
        list.addLast( "value4" );
        checkNodes();
        assertEquals( "value4", list.removeFirst() );
        checkNodes();
    }
    
    public void testRemoveLast() {
        resetEmpty();
        AbstractLinkedList list = (AbstractLinkedList) collection;
        if (isRemoveSupported() == false) {
            try {
                list.removeLast();
            } catch (UnsupportedOperationException ex) {}
        } 
        
        list.addAll( Arrays.asList( new String[]{"value1", "value2"}));
        assertEquals( "value2", list.removeLast() );
        list.addFirst( "value3");
        checkNodes();
        assertEquals( "value1", list.removeLast() );
        assertEquals( "value3", list.removeLast() );
        list.addFirst( "value4" );
        checkNodes();
        assertEquals( "value4", list.removeFirst() );
    }
    
    public void testAddNodeAfter() {
        resetEmpty();
        AbstractLinkedList list = (AbstractLinkedList) collection;
        if (isAddSupported() == false) {
            try {
                list.addFirst(null);
            } catch (UnsupportedOperationException ex) {}
        } 
        
        list.addFirst("value1");
        list.addNodeAfter(list.getNode(0,false),"value2");
        assertEquals("value1", list.getFirst());
        assertEquals("value2", list.getLast());
        list.removeFirst();
        checkNodes();
        list.addNodeAfter(list.getNode(0,false),"value3");
        checkNodes();
        assertEquals("value2", list.getFirst());
        assertEquals("value3", list.getLast());
        list.addNodeAfter(list.getNode(0, false),"value4");
        checkNodes();
        assertEquals("value2", list.getFirst());
        assertEquals("value3", list.getLast());
        assertEquals("value4", list.get(1));
        list.addNodeAfter(list.getNode(2, false), "value5");
        checkNodes();
        assertEquals("value2", list.getFirst());
        assertEquals("value4", list.get(1));
        assertEquals("value3", list.get(2));
        assertEquals("value5", list.getLast());
    }
    
    public void testRemoveNode() {
        resetEmpty();
        if (isAddSupported() == false || isRemoveSupported() == false) return;
        AbstractLinkedList list = (AbstractLinkedList) collection;
        
        list.addAll( Arrays.asList( new String[]{"value1", "value2"}));
        list.removeNode(list.getNode(0, false));
        checkNodes();
        assertEquals("value2", list.getFirst());
        assertEquals("value2", list.getLast());
        list.addFirst("value1");
        list.addFirst("value0");
        checkNodes();
        list.removeNode(list.getNode(1, false));
        assertEquals("value0", list.getFirst());
        assertEquals("value2", list.getLast());
        checkNodes();
        list.removeNode(list.getNode(1, false));
        assertEquals("value0", list.getFirst());
        assertEquals("value0", list.getLast());
        checkNodes();
    }
    
    public void testGetNode() {
        resetEmpty();
        AbstractLinkedList list = (AbstractLinkedList) collection;
        // get marker
        assertEquals(list.getNode(0, true).previous, list.getNode(0, true).next);
        try {
            Object obj = list.getNode(0, false);
            fail("Expecting IndexOutOfBoundsException.");
        } catch (IndexOutOfBoundsException ex) {
            // expected
        }
        list.addAll( Arrays.asList( new String[]{"value1", "value2"}));
        checkNodes();
        list.addFirst("value0");
        checkNodes();
        list.removeNode(list.getNode(1, false));
        checkNodes();
        try {
            Object obj = list.getNode(2, false);
            fail("Expecting IndexOutOfBoundsException.");
        } catch (IndexOutOfBoundsException ex) {
            // expected
        }
        try {
            Object obj = list.getNode(-1, false);
            fail("Expecting IndexOutOfBoundsException.");
        } catch (IndexOutOfBoundsException ex) {
            // expected
        }
         try {
            Object obj = list.getNode(3, true);
            fail("Expecting IndexOutOfBoundsException.");
        } catch (IndexOutOfBoundsException ex) {
            // expected
        }       
    }
    
    protected void checkNodes() {
        AbstractLinkedList list = (AbstractLinkedList) collection;
        for (int i = 0; i < list.size; i++) {
            assertEquals(list.getNode(i, false).next, list.getNode(i + 1, true));
            if (i < list.size - 1) {
                assertEquals(list.getNode(i + 1, false).previous, 
                    list.getNode(i, false));  
            }
        }
    }
        
}