testinferenceengine4multipleresults.java

Mandarax是一个规则引擎的纯Java实现。它支持多类型的事实和基于反映的规则

package test.org.mandarax.reference;

/**
 *  Copyright (C) 1999-2004  Jens Dietrich (mailto:[e-mail])
 *
 *  This library is free software; you can redistribute it and/or
 *  modify it under the terms of the GNU Lesser General Public
 *  License as published by the Free Software Foundation; either
 *  version 2 of the License, or (at your option) any later version.
 *
 *  This library is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 *  Lesser General Public License for more details.
 *
 *  You should have received a copy of the GNU Lesser General Public
 *  License along with this library; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

import java.util.List;
import org.mandarax.kernel.InferenceEngine;
import org.mandarax.kernel.InferenceException;
import org.mandarax.kernel.KnowledgeBase;
import org.mandarax.kernel.Query;
import org.mandarax.kernel.ResultSet;

/**
 * An abstract test case class to test features of an inference engines supporting multiple results.
 * @author <A href="http://www-ist.massey.ac.nz/JBDietrich" target="_top">Jens Dietrich</A>
 * @version 3.4 <7 March 05>
 * @since 1.1
 */
public abstract class TestInferenceEngine4MultipleResults extends MandaraxTestCase {

	protected KnowledgeBase kb = null;
	protected InferenceEngine ie = new org.mandarax.reference.ResolutionInferenceEngine2();
	public static final String QUERY_VARIABLE = "x";

	/**
	 * Constructor.
	 * @param testName the name of the test method
	 */
	public TestInferenceEngine4MultipleResults(String testName) {
		super(testName);
	}
	/**
	 * Constructor.
	 * @param aKnowledgeBase a new, uninitialized knowledge base that will be used
	 * @param anInferenceEngine the inference engine that will be tested
	 */
	public TestInferenceEngine4MultipleResults(KnowledgeBase aKnowledgeBase, InferenceEngine anInferenceEngine) {
		super("testInferenceEngine");
		kb = aKnowledgeBase;
		ie = anInferenceEngine;
	}
	/**
	 * Populate the knowledge base.
	 * @param knowledge the knowledge base
	 */
	public abstract void feedKnowledgeBase(KnowledgeBase knowledge);
	/**
	 * Get the cardinality constraint (how many solutions
	 * should be compouted). Default is <code>InferenceEngine.ONE</code>
	 * @return the number of expected results
	 */
	public int getCardinalityConstraint() {
		return InferenceEngine.ALL;
	}
	/**
	 * Get a description of this test case.
	 * This is used by the <code>org.mandarax.demo</code>
	 * package to display the test cases.
	 * @return java.lang.String
	 */
	public String getDescription() {
		return "test case " + getClass().getName();
	}
	/**
	 * Get the persons we are looking for.
	 * @return the name of the person
	 */
	public abstract List getExpectedResults();
	/**
	 * Get a query.
	 * @return a query
	 */
	public abstract Query getQuery();
	/**
	 * Sets up the fixture.
	 */
	protected void setUp() {
		feedKnowledgeBase(kb);
	}
	/**
	 * Run the test.
	 */
	public void testInferenceEngine() {
		LOG_TEST.info("Start Testcase " + getClass().getName() + " , test method: " + "testInferenceEngine()");
		try {
			ResultSet rs = ie.query(getQuery(), kb, getCardinalityConstraint(), InferenceEngine.BUBBLE_EXCEPTIONS);
			List expected = getExpectedResults();
			boolean succ = true;
			for (int i = 0; i < expected.size(); i++) {
				succ = succ && rs.next();
				Object computed = rs.getResult(Person.class, QUERY_VARIABLE);
				succ = succ && expected.get(i).equals(computed);
			}
			// this ensures that there are no more results!
			succ = succ && !rs.next();
			// compare
			assertTrue(succ);
		}
		catch (InferenceException x) {
			assertTrue(false);
		}
		LOG_TEST.info("Finish Testcase " + getClass().getName() + " , test method: " + "testInferenceEngine()");
	}
}