package org.drools.integrationtests;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
import java.util.ArrayList;
import java.util.List;
import org.drools.Cheese;
import org.drools.KnowledgeBase;
import org.drools.KnowledgeBaseFactory;
import org.drools.builder.KnowledgeBuilder;
import org.drools.builder.KnowledgeBuilderFactory;
import org.drools.builder.ResourceType;
import org.drools.command.Command;
import org.drools.command.CommandFactory;
import org.drools.command.runtime.rule.FireAllRulesCommand;
import org.drools.io.ResourceFactory;
import org.drools.runtime.ExecutionResults;
import org.drools.runtime.StatelessKnowledgeSession;
import org.junit.Test;
public class FireAllRulesCommandTest {
@Test
public void oneRuleFiredTest() {
String str = "";
str += "package org.drools \n";
str += "rule StringRule \n";
str += " when \n";
str += " $c : Cheese() \n";
str += " then \n";
str += " System.out.println($c); \n";
str += "end \n";
StatelessKnowledgeSession ksession = getSession(str);
List<Command<?>> commands = new ArrayList<Command<?>>();
commands.add(CommandFactory.newInsert(new Cheese("stilton")));
commands.add(CommandFactory.newFireAllRules("num-rules-fired"));
ExecutionResults results = ksession.execute(CommandFactory.newBatchExecution(commands));
int fired = Integer.parseInt(results.getValue("num-rules-fired").toString());
assertEquals(1, fired);
}
@Test
public void fiveRulesFiredTest() {
String str = "";
str += "package org.drools \n";
str += "rule StringRule \n";
str += " when \n";
str += " $c : Cheese() \n";
str += " then \n";
str += " System.out.println($c); \n";
str += "end \n";
StatelessKnowledgeSession ksession = getSession(str);
List<Command<?>> commands = new ArrayList<Command<?>>();
commands.add(CommandFactory.newInsert(new Cheese("stilton")));
commands.add(CommandFactory.newInsert(new Cheese("gruyere")));
commands.add(CommandFactory.newInsert(new Cheese("cheddar")));
commands.add(CommandFactory.newInsert(new Cheese("stinky")));
commands.add(CommandFactory.newInsert(new Cheese("limburger")));
commands.add(CommandFactory.newFireAllRules("num-rules-fired"));
ExecutionResults results = ksession.execute(CommandFactory.newBatchExecution(commands));
int fired = Integer.parseInt(results.getValue("num-rules-fired").toString());
assertEquals(5, fired);
}
@Test
public void zeroRulesFiredTest() {
String str = "";
str += "package org.drools \n";
str += "rule StringRule \n";
str += " when \n";
str += " $c : Cheese() \n";
str += " then \n";
str += " System.out.println($c); \n";
str += "end \n";
StatelessKnowledgeSession ksession = getSession(str);
List<Command<?>> commands = new ArrayList<Command<?>>();
commands.add(CommandFactory.newInsert("not cheese"));
commands.add(CommandFactory.newFireAllRules("num-rules-fired"));
ExecutionResults results = ksession.execute(CommandFactory.newBatchExecution(commands));
int fired = Integer.parseInt(results.getValue("num-rules-fired").toString());
assertEquals(0, fired);
}
@Test
public void oneRuleFiredWithDefinedMaxTest() {
String str = "";
str += "package org.drools \n";
str += "rule StringRule \n";
str += " when \n";
str += " $c : Cheese() \n";
str += " then \n";
str += " System.out.println($c); \n";
str += "end \n";
StatelessKnowledgeSession ksession = getSession(str);
List<Command<?>> commands = new ArrayList<Command<?>>();
commands.add(CommandFactory.newInsert(new Cheese("stilton")));
FireAllRulesCommand farc = (FireAllRulesCommand) CommandFactory.newFireAllRules(10);
farc.setOutIdentifier("num-rules-fired");
commands.add(farc);
ExecutionResults results = ksession.execute(CommandFactory.newBatchExecution(commands));
int fired = Integer.parseInt(results.getValue("num-rules-fired").toString());
assertEquals(1, fired);
}
@Test
public void infiniteLoopTerminatesAtMaxTest() {
String str = "";
str += "package org.drools \n";
str += "rule StringRule \n";
str += " when \n";
str += " $c : Cheese() \n";
str += " then \n";
str += " update($c); \n";
str += "end \n";
StatelessKnowledgeSession ksession = getSession(str);
List<Command<?>> commands = new ArrayList<Command<?>>();
commands.add(CommandFactory.newInsert(new Cheese("stilton")));
FireAllRulesCommand farc = (FireAllRulesCommand) CommandFactory.newFireAllRules(10);
farc.setOutIdentifier("num-rules-fired");
commands.add(farc);
ExecutionResults results = ksession.execute(CommandFactory.newBatchExecution(commands));
int fired = Integer.parseInt(results.getValue("num-rules-fired").toString());
assertEquals(10, fired);
}
private StatelessKnowledgeSession getSession(String drl) {
KnowledgeBuilder kbuilder = KnowledgeBuilderFactory.newKnowledgeBuilder();
kbuilder.add(ResourceFactory.newByteArrayResource(drl.getBytes()), ResourceType.DRL);
if (kbuilder.hasErrors()) {
System.err.println(kbuilder.getErrors());
}
assertFalse(kbuilder.hasErrors());
KnowledgeBase kbase = KnowledgeBaseFactory.newKnowledgeBase();
kbase.addKnowledgePackages(kbuilder.getKnowledgePackages());
return kbase.newStatelessKnowledgeSession();
}
}