我认为总的来说,您已经意识到最好的方法是模拟响应。在 Scala 中,这可以使用 Scala Mock http://scalamock.org/来完成
如果您安排您的代码,以便您的实例akka.http.scaladsl.HttpExt
依赖注入到使用它的代码中(例如作为构造函数参数),那么在测试期间您可以注入一个实例mock[HttpExt]
而不是使用Http
apply 方法构建的实例。
编辑:我想这是因为不够具体而被否决。这是我将如何构建您的场景的模拟。所有的隐式都使它变得更加复杂。
中的代码main
:
import akka.actor.ActorSystem
import akka.http.scaladsl.Http
import akka.http.scaladsl.model.{Uri, HttpResponse, HttpRequest}
import akka.http.scaladsl.unmarshalling.Unmarshal
import akka.stream.ActorMaterializer
import scala.concurrent.{ExecutionContext, Future}
trait S3BucketTrait {
type HttpResponder = HttpRequest => Future[HttpResponse]
def responder: HttpResponder
implicit def actorSystem: ActorSystem
implicit def actorMaterializer: ActorMaterializer
implicit def ec: ExecutionContext
def sampleTextFile(uri: Uri): Future[String] = {
val responseF = responder(HttpRequest(uri = uri))
responseF.flatMap { response => Unmarshal(response.entity).to[String] }
}
}
class S3Bucket(implicit val actorSystem: ActorSystem, val actorMaterializer: ActorMaterializer) extends S3BucketTrait {
override val ec: ExecutionContext = actorSystem.dispatcher
override def responder = Http().singleRequest(_)
}
中的代码test
:
import akka.actor.ActorSystem
import akka.http.scaladsl.model._
import akka.stream.ActorMaterializer
import akka.testkit.TestKit
import org.scalatest.{BeforeAndAfterAll, WordSpecLike, Matchers}
import org.scalamock.scalatest.MockFactory
import scala.concurrent._
import scala.concurrent.duration._
import scala.concurrent.Future
class S3BucketSpec extends TestKit(ActorSystem("S3BucketSpec"))
with WordSpecLike with Matchers with MockFactory with BeforeAndAfterAll {
class MockS3Bucket(reqRespPairs: Seq[(Uri, String)]) extends S3BucketTrait{
override implicit val actorSystem = system
override implicit val ec = actorSystem.dispatcher
override implicit val actorMaterializer = ActorMaterializer()(system)
val mock = mockFunction[HttpRequest, Future[HttpResponse]]
override val responder: HttpResponder = mock
reqRespPairs.foreach{
case (uri, respString) =>
val req = HttpRequest(HttpMethods.GET, uri)
val resp = HttpResponse(status = StatusCodes.OK, entity = respString)
mock.expects(req).returning(Future.successful(resp))
}
}
"S3Bucket" should {
"Marshall responses to Strings" in {
val mock = new MockS3Bucket(Seq((Uri("http://example.com/1"), "Response 1"), (Uri("http://example.com/2"), "Response 2")))
Await.result(mock.sampleTextFile("http://example.com/1"), 1 second) should be ("Response 1")
Await.result(mock.sampleTextFile("http://example.com/2"), 1 second) should be ("Response 2")
}
}
override def afterAll(): Unit = {
val termination = system.terminate()
Await.ready(termination, Duration.Inf)
}
}
build.sbt
依赖项:
libraryDependencies += "com.typesafe.akka" % "akka-http-experimental_2.11" % "2.0.1"
libraryDependencies += "org.scalamock" %% "scalamock-scalatest-support" % "3.2" % "test"
libraryDependencies += "org.scalatest" % "scalatest_2.11" % "2.2.6"
libraryDependencies += "com.typesafe.akka" % "akka-testkit_2.11" % "2.4.1"