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Test suite for SAIL and Repository API
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/* 
 * Licensed to Aduna under one or more contributor license agreements.  
 * See the NOTICE.txt file distributed with this work for additional 
 * information regarding copyright ownership. 
 *
 * Aduna licenses this file to you under the terms of the Aduna BSD 
 * License (the "License"); you may not use this file except in compliance 
 * with the License. See the LICENSE.txt file distributed with this work 
 * for the full License.
 *
 * Unless required by applicable law or agreed to in writing, software 
 * distributed under the License is distributed on an "AS IS" BASIS, 
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or 
 * implied. See the License for the specific language governing permissions
 * and limitations under the License.
 */
package org.openrdf.sail;

import static org.junit.Assert.*;

import org.junit.Test;

import org.openrdf.model.vocabulary.RDF;
import org.openrdf.model.vocabulary.RDFS;

/**
 * A JUnit test for testing Sail implementations that store RDF data. This is
 * purely a test for data storage and retrieval which assumes that no
 * inferencing or whatsoever is performed. This is an abstract class that should
 * be extended for specific Sail implementations.
 */
public abstract class RDFNotifyingStoreTest extends RDFStoreTest implements SailChangedListener {

	/*-----------*
	 * Variables *
	 *-----------*/

	private int removeEventCount;

	private int addEventCount;

	/*---------*
	 * Methods *
	 *---------*/

	/**
	 * Gets an instance of the Sail that should be tested. The returned
	 * repository should already have been initialized.
	 * 
	 * @return an initialized Sail.
	 * @throws SailException
	 *         If the initialization of the repository failed.
	 */
	@Override
	protected abstract NotifyingSail createSail()
		throws SailException;

	@Override
	public void setUp()
		throws Exception
	{
		super.setUp();

		// set self as listener
		((NotifyingSail) sail).addSailChangedListener(this);

	}

	@Test
	public void testNotifyingRemoveAndClear()
		throws Exception
	{
		// Add some data to the repository
		con.begin();
		con.addStatement(painter, RDF.TYPE, RDFS.CLASS);
		con.addStatement(painting, RDF.TYPE, RDFS.CLASS);
		con.addStatement(picasso, RDF.TYPE, painter, context1);
		con.addStatement(guernica, RDF.TYPE, painting, context1);
		con.addStatement(picasso, paints, guernica, context1);
		con.commit();

		// Test removal of statements
		con.begin();
		con.removeStatements(painting, RDF.TYPE, RDFS.CLASS);
		con.commit();

		assertEquals("Repository should contain 4 statements in total", 4, countAllElements());

		assertEquals("Named context should contain 3 statements", 3, countContext1Elements());

		assertEquals("Statement (Painting, type, Class) should no longer be in the repository", 0,
				countQueryResults("select 1 from {ex:Painting} rdf:type {rdfs:Class}"));

		con.begin();
		con.removeStatements(null, null, null, context1);
		con.commit();

		assertEquals("Repository should contain 1 statement in total", 1, countAllElements());

		assertEquals("Named context should be empty", 0, countContext1Elements());

		con.begin();
		con.clear();
		con.commit();

		assertEquals("Repository should no longer contain any statements", 0, countAllElements());

		// test if event listener works properly.
		assertEquals("There should have been 1 event in which statements were added", 1, addEventCount);

		assertEquals("There should have been 3 events in which statements were removed", 3, removeEventCount);
	}

	@Override
	public void sailChanged(SailChangedEvent event) {
		if (event.statementsAdded()) {
			addEventCount++;
		}
		if (event.statementsRemoved()) {
			removeEventCount++;
		}
	}
}