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/*
 * (c) Copyright 2008, 2009 Hewlett-Packard Development Company, LP
 * All rights reserved.
 * [See end of file]
 */

package atlas.iterator;

import java.util.ArrayList;
import java.util.List;

import atlas.iterator.Iter;
import atlas.iterator.IteratorArray;
import atlas.iterator.PeekIterator;
import atlas.test.BaseTest;

import org.junit.Test;

public class TestIterator extends BaseTest
{
    List data0 = new ArrayList() ;
    List data1 = new ArrayList() ;
    {
        data1.add("a") ;
    }
    
    List data2 = new ArrayList() ;
    {
        data2.add("x") ;
        data2.add("y") ;
        data2.add("z") ;
    }
    
    @Test public void iter_01() 
    {
        Iter iter = Iter.iter(data2) ;
        iter = iter.append(data2.iterator()) ;
        test(iter, "x", "y", "z", "x", "y", "z") ;
    }
    
    private void test(Iter iter, Object... items)
    {
        for ( Object x : items )
        {
            assertTrue(iter.hasNext()) ;
            assertEquals(x, iter.next()) ;
        }
        assertFalse(iter.hasNext()) ;
    }
    
    private static PeekIterator create(String...a)
    { 
        return new PeekIterator(IteratorArray.create(a)) ;
    }
    
    @Test public void peek_1()
    {
        PeekIterator peek = create("a", "b", "c") ;
        assertEquals("a", peek.peek()) ;
        test(Iter.iter(peek), "a", "b", "c") ;
    }
    
    @Test public void peek_2()
    {
        PeekIterator peek = create() ;
        assertFalse(peek.hasNext()) ;
    }

    @Test public void peek_3()
    {
        PeekIterator peek = create("a") ;
        assertEquals("a", peek.peek()) ;
    }

    @Test public void peek_4()
    {
        PeekIterator peek = create("a") ;
        assertEquals("a", peek.peek()) ;
        assertEquals("a", peek.peek()) ;
        assertEquals("a", peek.next()) ;
        assertFalse(peek.hasNext()) ;
    }

    @Test public void peek_5()
    {
        PeekIterator peek = create("a", "b") ;
        assertEquals("a", peek.peek()) ;
        assertEquals("a", peek.peek()) ;
        assertEquals("a", peek.next()) ;
        assertTrue(peek.hasNext()) ;
        assertEquals("b", peek.peek()) ;
        assertEquals("b", peek.peek()) ;
        assertEquals("b", peek.next()) ;
        assertFalse(peek.hasNext()) ;
    }
}

/*
 * (c) Copyright 2008, 2009 Hewlett-Packard Development Company, LP
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. The name of the author may not be used to endorse or promote products
 *    derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */