kernel/src/test/scala/org/apache/toree/kernel/protocol/v5/kernel/socket/IOPubSpec.scala

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 *  this work for additional information regarding copyright ownership.
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package org.apache.toree.kernel.protocol.v5.kernel.socket

import akka.actor.{ActorSystem, Props}
import akka.testkit.{ImplicitSender, TestKit, TestProbe}
import org.apache.toree.communication.ZMQMessage
import org.apache.toree.kernel.protocol.v5.kernel.Utilities
import org.apache.toree.kernel.protocol.v5Test._
import Utilities._
import com.typesafe.config.ConfigFactory
import org.mockito.ArgumentMatchers._
import org.mockito.Mockito._
import org.scalatestplus.mockito.MockitoSugar
import org.scalatest.funspec.AnyFunSpecLike
import org.scalatest.matchers.should.Matchers
import test.utils.MaxAkkaTestTimeout

object IOPubSpec {
  val config ="""
    akka {
      loglevel = "WARNING"
    }"""
}

class IOPubSpec extends TestKit(
  ActorSystem("IOPubActorSpec",
    ConfigFactory.parseString(IOPubSpec.config),
    org.apache.toree.Main.getClass.getClassLoader
  ))
with ImplicitSender with AnyFunSpecLike with Matchers with MockitoSugar {

  describe("IOPubActor") {
    val socketFactory = mock[SocketFactory]
    val probe : TestProbe = TestProbe()
    when(socketFactory.IOPub(any(classOf[ActorSystem]))).thenReturn(probe.ref)

    val socket = system.actorOf(Props(classOf[IOPub], socketFactory))

    // TODO test that the response type changed
    describe("#receive") {
      it("should reply with a ZMQMessage") {
        //  Use the implicit to convert the KernelMessage to ZMQMessage
        val MockZMQMessage : ZMQMessage = MockKernelMessage

        socket ! MockKernelMessage
        probe.expectMsg(MaxAkkaTestTimeout, MockZMQMessage)
      }
    }
  }
}