MyTestClassScalaTestVanilla.scala

class MyTestClass extends WordSpec with BeforeAndAfterAll {
  val person = Person(carId = None).save() // creating data for test
  val car = Car(color = "green", ownerId = None).save()

  override def afterAll(): Unit = {
    // Clean db after test.
    person.destroy()
    car.destroy()
  }

  "My service" should {
    "set the owner of the car" in {
      val service = new Service
      service.setCarOwner(carId = car.id, ownerId = person.id)
      service.getPerson(person.id).carId shouldEqual Some(car.id)
    }
  }
}