/*******************************************************************************
 * Copyright (c) 2007, 2010 Association for Decentralized Information Management
 * in Industry THTH ry.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *     VTT Technical Research Centre of Finland - initial API and implementation
 *******************************************************************************/
package org.simantics.db.tests.api.request.exception;

import org.junit.Test;
import org.simantics.db.ReadGraph;
import org.simantics.db.Session;
import org.simantics.db.exception.DatabaseException;
import org.simantics.db.request.Read;
import org.simantics.db.testing.base.ExistingDatabaseTest;
import org.simantics.layer0.Layer0;

public class GraphSyncReadThrowsNoSingleResultException extends ExistingDatabaseTest {
	
	@Test
	public void test() throws Exception {
		
		Session session = getSession();
		
		try {
		
    		session.syncRequest(new Read<Object>() {
    
    			@Override
    			public Object perform(ReadGraph graph) throws DatabaseException {
    			    
    			    return graph.syncRequest(new Read<Object>() {

                        @Override
                        public Object perform(ReadGraph graph) throws DatabaseException {
                            Layer0 b = Layer0.getInstance(graph);
                            return graph.getSingleObject(graph.getRootLibrary(), b.Inherits);
                        }
    			        
    			    });
    			    
    
    			}
    			
    		});
    		
		} catch(DatabaseException e) {
		    
		    if (DEBUG)
		    	e.printStackTrace();
		    
		    return;
		    
		} catch(Throwable t) {
		    
	        fail("syncRequest threw unexpected throwable " + t);

		}
		
		fail("syncRequest did not throw");
		
	}

}