/*
 * (c) Copyright 2007-2011 by Volker Bergmann. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, is permitted under the terms of the
 * GNU General Public License.
 *
 * For redistributing this software or a derivative work under a license other
 * than the GPL-compatible Free Software License as defined by the Free
 * Software Foundation or approved by OSI, you must first obtain a commercial
 * license to this software product from Volker Bergmann.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * WITHOUT A WARRANTY OF ANY KIND. ALL EXPRESS OR IMPLIED CONDITIONS,
 * REPRESENTATIONS AND WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT, ARE
 * HEREBY EXCLUDED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS 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.
 */

package org.databene.benerator.wrapper;

import static org.junit.Assert.*;

import java.util.Arrays;

import org.databene.benerator.Generator;
import org.databene.benerator.test.GeneratorTest;
import org.databene.commons.HeavyweightIterator;
import org.databene.commons.IOUtil;
import org.databene.commons.TypedIterable;
import org.databene.commons.iterator.TypedIterableProxy;
import org.databene.commons.iterator.HeavyweightIterableAdapter;

import org.junit.Test;

/**
 * Tests the {@link IteratingGenerator}.<br/>
 * <br/>
 * Created: 01.09.2007 17:22:03
 * @author Volker Bergmann
 */
public class IteratingGeneratorTest extends GeneratorTest {

    @Test
    public void testDefaultBehaviour() {
        HeavyweightIterableAdapter<Integer> iterable = new HeavyweightIterableAdapter<Integer>(Arrays.asList(1, 2));
		TypedIterableProxy<Integer> hwIterable = new TypedIterableProxy<Integer>(Integer.class, iterable);
		Generator<Integer> gen = new IteratingGenerator<Integer>(hwIterable);
		gen.init(context);
		expectGeneratedSequence(gen, 1, 2).withCeasedAvailability();
	}
    
    @Test
    public void testEmptyIterator() {
    	EmptyIterable emptySource = new EmptyIterable();
    	Generator<Integer> generator = new IteratingGenerator<Integer>(emptySource);
    	generator.init(context);
    	assertUnavailable(generator);
    	assertTrue(emptySource.latestInstance.closed);
    	IOUtil.close(generator);
	}
    
    public static class EmptyIterable implements TypedIterable<Integer> {

    	public EmptyIterator latestInstance;
    	
		public Class<Integer> getType() {
			return Integer.class;
		}
    	
		public HeavyweightIterator<Integer> iterator() {
			latestInstance = new EmptyIterator();
			 return latestInstance;
		}

    }
    
    public static class EmptyIterator implements HeavyweightIterator<Integer> {
    	
    	public boolean closed = false;

		public boolean hasNext() {
			return false;
		}

		public Integer next() {
			throw new IllegalStateException();
		}

		public void remove() {
			throw new UnsupportedOperationException("EmptyIterator.remove() is not supported");
		}

		public void close() {
			closed = true;
		}
    	
    }
    	
}