Drools Hello world revisited / published by https://github.com/dacr/code-examples-manager #ceb03394-2537-43f5-96c4-85f702e68ac6/b6af0e1058eb4b26f0c78763d9de267e0d08a7f5

drools-hello-world-revisited.sc

// summary : Drools Hello world revisited
// keywords : scala, drools, mvel, scalatest, ai, helloworld, @testable
// 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 : ceb03394-2537-43f5-96c4-85f702e68ac6
// execution : scala ammonite script (http://ammonite.io/) - run as follow 'amm scriptname.sc'
// created-on : 2019-10-01T09:16:40+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 HelloTest extends AnyFlatSpec with should.Matchers {
  "Drools" should "say hello" in {
    val drl =
      """package test
        |
        |declare Someone
        |  name:String
        |end
        |
        |declare Message
        |  message:String
        |end
        |
        |rule "hello" when
        |  Someone($name:name)
        |then
        |  insert(new Message("HELLO "+$name));
        |end
        |""".stripMargin
    val engine = DroolsEngine(drl)
    engine.insertJson("""{"name":"John"}""","test.Someone")
    engine.fireAllRules()
    val msgOption = engine.getModelFirstInstanceAttribute("test.Message", "message")
    msgOption.value shouldBe "HELLO John"
  }
}
HelloTest.execute()