/*
 * Created on Dec 3, 2004
 *
 */
package aima.test.logictest.prop.algorithms;

import junit.framework.TestCase;
import aima.logic.propositional.algorithms.KnowledgeBase;

/**
 * @author Ravi Mohan
 *
 */
public class KnowledgeBaseTest extends TestCase {
	private KnowledgeBase kb;
	
	public void setUp(){
		kb= new KnowledgeBase();
	}
	public void testTellInsertsSentence(){
		kb.tell("(A AND B)");
		assertEquals(1,kb.size());
	}
	
	public void testTellDoesNotInsertSameSentenceTwice(){
		kb.tell("(A AND B)");
		assertEquals(1,kb.size());
		kb.tell("(A AND B)");
		assertEquals(1,kb.size());
	}
	
	public void testEmptyKnowledgeBaseIsAnEmptyString(){
		assertEquals("",kb.toString());
	}
	
	public void testKnowledgeBaseWithOneSentenceToString(){
		kb.tell("(A AND B)");
		assertEquals(" ( A AND B )",kb.toString());
	}
	
	public void testKnowledgeBaseWithTwoSentencesToString(){
		kb.tell("(A AND B)");
		kb.tell("(C AND D)");
		assertEquals(" (  ( A AND B ) AND  ( C AND D ) )",kb.toString());
	}
	public void testKnowledgeBaseWithThreeSentencesToString(){
		kb.tell("(A AND B)");
		kb.tell("(C AND D)");
		kb.tell("(E AND F)");
		assertEquals(" (  (  ( A AND B ) AND  ( C AND D ) ) AND  ( E AND F ) )",kb.toString());
	}
}