Drools forever loop knowledge base / published by https://github.com/dacr/code-examples-manager #f5215bd9-2dff-4529-bdbf-13b5b134b744/b361ef296c4158d27e1d08f5e6fb873d2b8d2b28

drools-kb-forever-loop.sc

// summary : Drools forever loop knowledge base
// keywords : scala, drools, mvel, scalatest, ai, knowledgebase
// publish : gist
// authors : David Crosson
// license : Apache NON-AI License Version 2.0 (https://raw.githubusercontent.com/non-ai-licenses/non-ai-licenses/main/NON-AI-APACHE2)
// id : f5215bd9-2dff-4529-bdbf-13b5b134b744
// created-on : 2019-10-04T09:15:21+02:00
// managed-by : https://github.com/dacr/code-examples-manager
// run-with : scala-cli $file

// ---------------------
//> using scala  "3.3.0"
//> using dep "fr.janalyse::drools-scripting:1.1.0"
//> using dep "org.scalatest::scalatest:3.2.16"
// ---------------------

import fr.janalyse.droolscripting._, org.scalatest._, flatspec._, matchers._, OptionValues._
object KbTest extends AnyFlatSpec with should.Matchers {
  val drl =
    """package test
      |declare A end
      |declare B end
      |declare B end
      |rule "init"             when not A()      then insert(new A()); end
      |rule "A -> B"           when A()          then insert(new B()); end
      |rule "B and A -> not A" when $a:A() B()   then delete($a); end
      |""".stripMargin

  "test KB" should "work" in {
    val engine = DroolsEngine(drl)
    engine.fireAllRules()
  }
}
KbTest.execute()