/*
 * *************************************************************************************
 *  Copyright (C) 2008 EsperTech, Inc. All rights reserved.                            *
 *  http://esper.codehaus.org                                                          *
 *  http://www.espertech.com                                                           *
 *  ---------------------------------------------------------------------------------- *
 *  The software in this package is published under the terms of the GPL license       *
 *  a copy of which has been included with this distribution in the license.txt file.  *
 * *************************************************************************************
 */

package com.espertech.esper.epl.join.rep;

import junit.framework.*;
import java.util.NoSuchElementException;

import com.espertech.esper.client.EventBean;

public class TestSingleCursorIterator extends TestCase
{
    private SingleCursorIterator filledIterator;
    private SingleCursorIterator emptyIterator;
    private Cursor cursor;

    public void setUp()
    {
        cursor = makeAnonymousCursor();
        filledIterator = new SingleCursorIterator(cursor);
        emptyIterator = new SingleCursorIterator(null);
    }

    public void testNext()
    {
        assertSame(cursor, filledIterator.next());
        try
        {
            filledIterator.next();
            TestCase.fail();
        }
        catch (NoSuchElementException ex)
        {
            // Expected exception
        }

        try
        {
            emptyIterator.next();
            TestCase.fail();
        }
        catch (NoSuchElementException ex)
        {
            // Expected exception
        }
    }

    public void testHasNext()
    {
        assertTrue(filledIterator.hasNext());
        filledIterator.next();
        assertFalse(filledIterator.hasNext());

        assertFalse(emptyIterator.hasNext());
    }

    public void testRemove()
    {
        try
        {
            filledIterator.remove();
            assertTrue(false);
        }
        catch (UnsupportedOperationException ex)
        {
            // Expected exception
        }
    }

    private Cursor makeAnonymousCursor()
    {
        return new Cursor(null, 0, null) {

            public EventBean getLookupEvent()
            {
                return null;
            }

            public int getLookupStream()
            {
                return 0;
            }

            public int getIndexedStream()
            {
                return 0;
            }
        };
    }
}