How to test methods that return Future?

Question

I\'d like to test a method that returns a Future. My attempts were as follows:

import  org.specs2.mutable.Specification
import scala.concurrent.Exec         


        

Answer 1

Await is an anti pattern. Shouldn't ever use it. You can use traits like ScalaFutures, IntegrationPatience, and Eventually.

Example:

import org.specs2.mutable.Specification
import scala.concurrent.ExecutionContext.Implicits.global
import scala.util.{Failure, Success}
import org.scalatest.concurrent.{IntegrationPatience, ScalaFutures}
import scala.concurrent.Future

class AsyncWebClientSpec extends Specification with ScalaFutures
    with IntegrationPatience{

    "WebClient when downloading images" should {
        "for a valid link return non-zero content " in {
            whenReady(Future.successful("Done")){ testImage =>
                testImage must be equalTo "Done"           
                // Do whatever you need
            }

        }
    }
}