如何使用akka测试工具包在scala测试中以异步方式获取未来值

import akka.actor.ActorSystem
import akka.testkit.TestKit
import org.scalatest.{BeforeAndAfterAll, Matchers, WordSpecLike}

import scala.concurrent.Future

class MyTest extends TestKit(ActorSystem("MyTest"))
  with WordSpecLike
  with Matchers
  with BeforeAndAfterAll {

  // 在测试之前进行一些初始化操作
  override def beforeAll(): Unit = {
    // 初始化ActorSystem等
  }

  // 在测试之后进行一些清理操作
  override def afterAll(): Unit = {
    // 关闭ActorSystem等资源
    TestKit.shutdownActorSystem(system)
  }

  "MyTest" should {
    "return future value asynchronously" in {
      val futureValue: Future[String] = Future {
        // 执行一些异步操作，返回一个字符串
        "Hello, World!"
      }

      // 使用ScalaTest的异步断言来验证未来值
      import scala.concurrent.duration._
      import scala.concurrent.Await
      val result = Await.result(futureValue, 3.seconds)
      result shouldBe "Hello, World!"
    }
  }
}