How to test client-side Akka HTTP

Question

I\'ve just started testing out the Akka HTTP Request-Level Client-Side API (Future-Based). One thing I\'ve been struggling to figure out is how to write a unit test for this. Is

Answer 1

I was hoping there might be a way to leverage some sort of test actor system but in the absence of that (or some other idiomatic way) I am probably going to do something like this:

object S3Bucket {

  type HttpResponder = HttpRequest => Future[HttpResponse]

  def defaultResponder = Http().singleRequest(_)

  def sampleTextFile(uri: Uri)(
    implicit akkaSystem: ActorSystem,
    akkaMaterializer: ActorMaterializer,
    responder: HttpResponder = defaultResponder
  ): Future[String] = {
    val request = responder(HttpRequest(uri = uri))
    request.map { response => Unmarshal(response.entity).to[String] }
  }
}

Then in my test I can just provide a mock HttpResponder.