How do you unit test Jboss Rules (Drools) rules?

Question

I have written a few Drools rules for my Seam application and am wondering how I go about unit testing these. Does anybody have any sample code that can show me how to go about doing this?

Answer 1

Add the following code to a unit test (JUnit, TestNG, etc):

PackageBuilder builder = new PackageBuilder();

builder.addPackageFromDrl(new InputStreamReader(getClass().getResourceAsStream( "rules.drl")));

PackageBuilderErrors errors = builder.getErrors();

Assert.assertEquals(0, errors.getErrors().length);

RuleBase ruleBase  = RuleBaseFactory.newRuleBase();
ruleBase.addPackage(pkg);

StatefullSession session = ruleBase.newStatefulSession(false);

MyFactObject myFact = new MyFactObject();

session.insert(myFact);
session.fireAllRules();

Answer 2

Consider some testing 'sugar' with a Junit TestRule library - droolsassert.