package org.drools;

import static org.junit.Assert.*;

import org.drools.builder.KnowledgeBuilder;
import org.drools.builder.KnowledgeBuilderError;
import org.drools.builder.KnowledgeBuilderFactory;
import org.drools.builder.ResourceType;
import org.drools.definition.type.FactType;
import org.drools.io.Resource;
import org.drools.io.ResourceFactory;
import org.drools.runtime.StatefulKnowledgeSession;
import org.junit.Ignore;
import org.junit.Test;

public class EvaluationTests
{
   //@Ignore
   @Test
   public void test() throws Exception {
      Resource resource = ResourceFactory
            .newClassPathResource("org/drools/fibonacci.drl");
      KnowledgeBuilder kbb = KnowledgeBuilderFactory.newKnowledgeBuilder();
      kbb.add(resource, ResourceType.DRL);
      if (kbb.hasErrors()) {
         for (KnowledgeBuilderError error : kbb.getErrors()) {
            System.out.println(error.getMessage());
         }

         throw new RuntimeException();
      }
      KnowledgeBase kb = KnowledgeBaseFactory.newKnowledgeBase();
      kb.addKnowledgePackages(kbb.getKnowledgePackages());

      FactType ft = kb.getFactType("org.drools.evaluation", "Fibonacci");
      Object fbn = ft.newInstance();
      ft.set(fbn, "value", -1L);
      ft.set(fbn, "sequence", 50);

      StatefulKnowledgeSession session = kb.newStatefulKnowledgeSession();
      session.insert(fbn);

      assertEquals(new Long(-1L), ft.get(fbn, "value"));
      try {
         session.fireAllRules();
         assertEquals(new Long(12586269025L), ft.get(fbn, "value"));
      } catch (NoClassDefFoundError e) {
         e.printStackTrace();
         fail();
      } finally {
         session.dispose();
      }
   }
}