Drools parsing issues / published by https://github.com/dacr/code-examples-manager #35be246f-26fd-4583-8da7-286d601cf37b/e535aaf900f6d08e1a5936aad5cde182b2771ae0

drools-parsing-issues.sc

// summary : Drools parsing issues
// keywords : scala, drools, mvel, scalatest, ai, @testable
// publish : gist
// authors : David Crosson
// license : Apache License Version 2.0 (https://www.apache.org/licenses/LICENSE-2.0.txt)
// id : 35be246f-26fd-4583-8da7-286d601cf37b
// created-on : 2019-10-02T17:04:57+02:00
// managed-by : https://github.com/dacr/code-examples-manager
// run-with : scala-cli $file

// ---------------------
//> using scala "3.5.1"
//> using dep "fr.janalyse::drools-scripting:1.2.0"
//> using dep "org.scalatest::scalatest:3.2.19"
// ---------------------

import fr.janalyse.droolscripting.*, org.scalatest.*, flatspec.*, matchers.*, OptionValues.*

object DroolsParsingTest extends AnyFlatSpec with should.Matchers {
  info("Be aware of the fact that drools knowledge base parsing may just fail...")
  "Drools parser" should "(not) give NullPointerException on inheritance issue" in {
    val drl =
      """package test
        |declare Truc end
        |declare Muche extends truc end
        |""".stripMargin
    intercept[NullPointerException] { // still true with drools 7.54.0.FINAL
      val engine = DroolsEngine(drl)  // because Muche extends truc instead of Truc
      engine.fireAllRules()
    }
  }
}
DroolsParsingTest.execute()