package org.drools.integrationtests;
import java.io.File;
import java.util.ArrayList;
import java.util.Calendar;
import java.util.GregorianCalendar;
import java.util.Date;
import java.util.List;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;
import static org.junit.Assert.*;
import org.drools.KnowledgeBase;
import org.drools.KnowledgeBaseFactory;
import org.drools.Cheese;
import org.drools.builder.KnowledgeBuilder;
import org.drools.builder.KnowledgeBuilderError;
import org.drools.builder.KnowledgeBuilderErrors;
import org.drools.builder.KnowledgeBuilderFactory;
import org.drools.builder.ResourceType;
import org.drools.io.ResourceFactory;
import org.drools.logger.KnowledgeRuntimeLogger;
import org.drools.logger.KnowledgeRuntimeLoggerFactory;
import org.drools.runtime.StatefulKnowledgeSession;
/**
* This is a sample class to launch a rule.
*/
public class DateComparisonTest {
@Test
public void testDateComparisonThan() throws Exception {
List<String> results = new ArrayList<String>();
// load up the knowledge base
String str = "";
str += "package org.drools;\n";
str += "dialect \"mvel\"\n";
str += "global java.util.List results;\n";
str += "rule \"test date greater than\"\n";
str += " when\n";
str += " $c : Cheese(type == \"Yesterday\")\n";
str += " Cheese(type == \"Tomorrow\", usedBy > ($c.usedBy))\n";
str += " then\n";
str += " results.add( \"test date greater than\" );\n";
str += "end\n";
str += "rule \"test date less than\"\n";
str += " when\n";
str += " $c : Cheese(type == \"Tomorrow\")\n";
str += " Cheese(type == \"Yesterday\", usedBy < ($c.usedBy));\n";
str += " then\n";
str += " results.add( \"test date less than\" );\n";
str += "end\n";
KnowledgeBuilder kbuilder = KnowledgeBuilderFactory.newKnowledgeBuilder();
kbuilder.add( ResourceFactory.newByteArrayResource( str.getBytes() ),
ResourceType.DRL );
KnowledgeBuilderErrors errors = kbuilder.getErrors();
if ( kbuilder.hasErrors() ) {
fail( kbuilder.getErrors().toString() );
}
KnowledgeBase kbase = KnowledgeBaseFactory.newKnowledgeBase();
kbase.addKnowledgePackages( kbuilder.getKnowledgePackages() );
StatefulKnowledgeSession ksession = kbase.newStatefulKnowledgeSession();
ksession.setGlobal( "results",
results );
File testTmpDir = new File("target/test-tmp/");
testTmpDir.mkdirs();
KnowledgeRuntimeLogger logger = KnowledgeRuntimeLoggerFactory.newFileLogger( ksession,
"target/test-tmp/testDateComparisonThan" );
// go !
Cheese yesterday = new Cheese( "Yesterday" );
yesterday.setUsedBy( yesterday() );
Cheese tomorrow = new Cheese( "Tomorrow" );
tomorrow.setUsedBy( tomorrow() );
ksession.insert( yesterday );
ksession.insert( tomorrow );
ksession.fireAllRules();
logger.close();
assertEquals( 2,
results.size() );
assertTrue( results.contains( "test date greater than" ) );
assertTrue( results.contains( "test date less than" ) );
}
private Date yesterday() {
Calendar c = new GregorianCalendar();
c.set( Calendar.DAY_OF_MONTH,
c.get( Calendar.DAY_OF_MONTH ) - 1 );
return c.getTime();
}
private Date tomorrow() {
Calendar c = new GregorianCalendar();
c.set( Calendar.DAY_OF_MONTH,
c.get( Calendar.DAY_OF_MONTH ) + 1 );
return c.getTime();
}
}