package org.simantics.db.tests.api.readGraph.getInverse;

import org.simantics.db.ReadGraph;
import org.simantics.db.Resource;
import org.simantics.db.WriteGraph;
import org.simantics.db.exception.DatabaseException;
import org.simantics.db.exception.ManyObjectsForFunctionalRelationException;
import org.simantics.db.exception.NoInverseException;
import org.simantics.db.exception.NoSingleResultException;
import org.simantics.db.testing.base.WriteReadTest;

/*
 * When a resource does not specify L0.InverseOf, getInverse shall throw NoInverseException.
 */
public class GetInverseTest3 extends WriteReadTest {
	private Resource relation1;
	private Resource relation2;
	private Resource relation3;

	@Override
	protected void write(WriteGraph graph) throws DatabaseException {

        //Create first resource and give it a name
        relation1 = graph.newResource();
        graph.claim(relation1, L0.Inherits, L0.Relation);
        relation2 = graph.newResource();
        graph.claim(relation2, L0.Inherits, L0.Relation);
        graph.claim(relation2, L0.InverseOf, relation1);

        relation3 = graph.newResource();
        graph.claim(relation3, L0.Inherits, L0.Relation);
        graph.claim(relation3, L0.InverseOf, relation1);

	}

	@Override
	protected void read(ReadGraph graph) throws DatabaseException {
        try {
        	assertNotNull("Null not allowed", graph.getInverse(relation1));
        } catch (NoInverseException e) {
            return;
        } catch(Throwable t) {
            fail("Wrong exception was thrown " + t);
        }
        
        fail("No exception was thrown!");
	}
	
}