package org.drools.integrationtests;
import java.io.InputStreamReader;
import java.io.Reader;
import java.io.StringReader;
import java.util.ArrayList;
import java.util.Collection;
import java.util.List;
import org.junit.After;
import org.junit.Before;
import org.junit.Ignore;
import org.junit.Test;
import static org.junit.Assert.*;
import org.drools.Cheese;
import org.drools.KnowledgeBase;
import org.drools.KnowledgeBaseFactory;
import org.drools.Person;
import org.drools.RuleBase;
import org.drools.RuleBaseConfiguration;
import org.drools.RuleBaseFactory;
import org.drools.WorkingMemory;
import org.drools.builder.KnowledgeBuilder;
import org.drools.builder.KnowledgeBuilderFactory;
import org.drools.builder.ResourceType;
import org.drools.compiler.PackageBuilder;
import org.drools.definition.KnowledgePackage;
import org.drools.io.ResourceFactory;
import org.drools.lang.Expander;
import org.drools.lang.dsl.DefaultExpanderResolver;
import org.drools.rule.Package;
import org.drools.runtime.StatefulKnowledgeSession;
public class DslTest {
protected RuleBase getRuleBase() throws Exception {
return RuleBaseFactory.newRuleBase( RuleBase.RETEOO,
null );
}
protected RuleBase getRuleBase(final RuleBaseConfiguration config) throws Exception {
return RuleBaseFactory.newRuleBase( RuleBase.RETEOO,
config );
}
@Test
public void testMultiLineTemplates() throws Exception {
final Reader source = new InputStreamReader( getClass().getResourceAsStream( "rule_with_expander_multiline.dslr" ) );
final Reader dsl = new InputStreamReader( getClass().getResourceAsStream( "test_dsl_multiline.dsl" ) );
Expander ex = new DefaultExpanderResolver(dsl).get("*", null);
String r = ex.expand(source);
assertEquals("when Car(color==\"Red\") then doSomething();", r.trim());
}
@Test
public void testWithExpanderDSL() throws Exception {
//final PackageBuilder builder = new PackageBuilder();
KnowledgeBuilder kbuilder = KnowledgeBuilderFactory.newKnowledgeBuilder();
kbuilder.add( ResourceFactory.newClassPathResource( "test_expander.dsl", getClass() ),
ResourceType.DSL );
kbuilder.add( ResourceFactory.newClassPathResource( "rule_with_expander_dsl.dslr", getClass() ) ,
ResourceType.DSLR );
assertFalse( kbuilder.hasErrors() );
// Check errors
final String err = kbuilder.getErrors().toString();
assertEquals( "",
err );
assertEquals( 0,
kbuilder.getErrors().size() );
// the compiled package
final Collection<KnowledgePackage> pkgs = kbuilder.getKnowledgePackages();
assertEquals( 1, pkgs.size() );
KnowledgeBase kbase = KnowledgeBaseFactory.newKnowledgeBase();
kbase.addKnowledgePackages( pkgs );
kbase = SerializationHelper.serializeObject( kbase );
StatefulKnowledgeSession session = kbase.newStatefulKnowledgeSession();
session.insert( new Person( "Bob",
"http://foo.bar" ) );
session.insert( new Cheese( "stilton",
42 ) );
final List messages = new ArrayList();
session.setGlobal( "messages",
messages );
// wm = SerializationHelper.serializeObject(wm);
session.fireAllRules();
// should have fired
assertEquals( 1,
messages.size() );
}
@Test
public void testWithExpanderMore() throws Exception {
KnowledgeBuilder kbuilder = KnowledgeBuilderFactory.newKnowledgeBuilder();
kbuilder.add( ResourceFactory.newClassPathResource( "test_expander.dsl", getClass() ),
ResourceType.DSL );
kbuilder.add( ResourceFactory.newClassPathResource( "rule_with_expander_dsl_more.dslr", getClass() ) ,
ResourceType.DSLR );
assertFalse( kbuilder.hasErrors() );
// Check errors
final String err = kbuilder.getErrors().toString();
assertEquals( "",
err );
assertEquals( 0,
kbuilder.getErrors().size() );
// the compiled package
final Collection<KnowledgePackage> pkgs = kbuilder.getKnowledgePackages();
assertEquals( 1, pkgs.size() );
KnowledgeBase kbase = KnowledgeBaseFactory.newKnowledgeBase();
kbase.addKnowledgePackages( pkgs );
kbase = SerializationHelper.serializeObject( kbase );
StatefulKnowledgeSession session = kbase.newStatefulKnowledgeSession();
session.insert( new Person( "rage" ) );
session.insert( new Cheese( "cheddar",
15 ) );
final List messages = new ArrayList();
session.setGlobal( "messages",
messages );
// wm = SerializationHelper.serializeObject(wm);
session.fireAllRules();
// should have NONE, as both conditions should be false.
assertEquals( 0,
messages.size() );
session.insert( new Person( "fire" ) );
session.fireAllRules();
// still no firings
assertEquals( 0,
messages.size() );
session.insert( new Cheese( "brie",
15 ) );
session.fireAllRules();
// YOUR FIRED
assertEquals( 1,
messages.size() );
}
@Test @Ignore
public void testEmptyDSL() throws Exception {
// FIXME eterelli / mic_hat not sure what to do with this?
final String DSL = "# This is an empty dsl file."; // gives antlr <EOF> error
KnowledgeBuilder kbuilder = KnowledgeBuilderFactory.newKnowledgeBuilder();
kbuilder.add( ResourceFactory.newClassPathResource( "test_expander.dsl", getClass() ),
ResourceType.DSL );
kbuilder.add( ResourceFactory.newReaderResource( new StringReader( DSL) ) ,
ResourceType.DSLR );
assertFalse( kbuilder.hasErrors() ); // trying to expand Cheese() pattern
// Check errors
final String err = kbuilder.getErrors().toString();
assertEquals( "",
err );
assertEquals( 0,
kbuilder.getErrors().size() );
// the compiled package
Collection<KnowledgePackage> pkgs = kbuilder.getKnowledgePackages();
assertEquals( 0, pkgs.size() );
KnowledgeBase kbase = KnowledgeBaseFactory.newKnowledgeBase();
kbase.addKnowledgePackages( pkgs );
kbase = SerializationHelper.serializeObject( kbase );
StatefulKnowledgeSession session = kbase.newStatefulKnowledgeSession();
pkgs = SerializationHelper.serializeObject( pkgs );
assertNull( pkgs );
}
@Test
public void testDSLWithIndividualConstraintMappings() throws Exception {
KnowledgeBuilder kbuilder = KnowledgeBuilderFactory.newKnowledgeBuilder();
kbuilder.add( ResourceFactory.newClassPathResource( "test_dslWithIndividualConstraints.dsl", getClass() ),
ResourceType.DSL );
kbuilder.add( ResourceFactory.newClassPathResource( "test_dslWithIndividualConstraints.dslr", getClass() ) ,
ResourceType.DSLR );
assertFalse( kbuilder.hasErrors() );
// Check errors
final String err = kbuilder.getErrors().toString();
assertEquals( "",
err );
assertEquals( 0,
kbuilder.getErrors().size() );
// the compiled package
final Collection<KnowledgePackage> pkgs = kbuilder.getKnowledgePackages();
assertEquals( 1, pkgs.size() );
KnowledgeBase kbase = KnowledgeBaseFactory.newKnowledgeBase();
kbase.addKnowledgePackages( pkgs );
kbase = SerializationHelper.serializeObject( kbase );
StatefulKnowledgeSession session = kbase.newStatefulKnowledgeSession();
List results = new ArrayList();
session.setGlobal( "results",
results );
Cheese cheese = new Cheese( "stilton",
42 );
session.insert( cheese );
// wm = SerializationHelper.serializeObject(wm);
session.fireAllRules();
// should have fired
assertEquals( 1,
results.size() );
assertEquals( cheese,
results.get( 0 ) );
}
}