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?

Grieco

I have actually figured this out for myself. Just wanted to contribute the question, and also the answer to the site for anyone else wondering about this. – Grieco

so answer your own question. You might get a self-learner badge ;) – Nolte

@samuelcarrijo - I meant to, just forgot. Thanks for the reminder ;) – Grieco

Now if you guys could only up vote the answer I can get that badge ;) – Grieco

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();

Grieco

I have to wait 2 days before I can do so ;) – Grieco

Answer 2

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

Knap