First example

NetworkCallExampleTest.scala

import org.scalatest.FlatSpec
import org.scalatest.concurrent.ScalaFutures

class NetworkCallExampleTest extends FlatSpec with ScalaFutures {
  it should "verify the future returns when complete" in {
    val networkCallExample = new NetworkCallExample
    //This will fail with a time out error
    whenReady(networkCallExample.lengthOfTheResponse("testurl")) { res =>
      assert(res == 10)
    }
  }
}