Spray.io: Can't compile test spec

Question

I have the following service:

trait PingService extends MyHttpService {

val pingRoutes =
    path("ping") {
      get {
        complete("message" -> "pong")
      }
    }
}

MyHttpServiceis a custom class that extends HttpServiceand only contains utility methods.

This is the test spec:

import akka.actor.ActorRefFactory
import org.json4s.{DefaultFormats, Formats}
import org.scalatest.{FreeSpec, Matchers}
import spray.testkit.ScalatestRouteTest

class PingServiceSpec extends FreeSpec with PingService with ScalatestRouteTest with Matchers {

override implicit def actorRefFactory: ActorRefFactory = system

override implicit def json4sFormats: Formats = DefaultFormats

  "Ping service" - {
    "when calling GET /ping" - {
      "should return 'pong'" in {
        Get("/ping") ~> pingRoutes ~> check {
          status should equal(200)
          entity.asString should contain("pong")
        }
      }
    }
  }
}

Whenever I try to run the tests, I get the following error:

could not find implicit value for parameter ta: PingServiceSpec.this.TildeArrow[spray.routing.RequestContext,Unit]

 Get("/ping") ~> userRoutes ~> check {
              ^

Am I doing something stupid? Any kind of help will be appreciated!

EDIT: Although this might look like a dupe of this question, it's not.

The solution provided in that post it's not working.

Dacey

Answer 1

The ScalatestRouteTest already provides an implicit ActorSystem. Remove the implicit modifier from your actorRefFactory method and the test should get executed.

Impressionable

The above error arises as a consequence from an implicit ambiguity, because you have two implicit ActorRefFactory in scope. The one from the ScalatestRouteTest the PingServiceSpec is based on and the one declared explicitly as actorRefFactory. – Impressionable

Thank you! But why exception mentions could not find implicit value for parameter ta (which is implicit ta: TildeArrow[A, B]) instead of actorRefFactory? – Koumis

I think because the compiler currently doesn't tell us, see SI-6127 for more info. – Impressionable