Mocking complete Response using Scalamock and dispatch

MockResponse.scala

// Example for lukaseichler.de/how-to-test-dispatch-request/

import java.io.InputStream
import java.net.URI
import java.nio.ByteBuffer
import java.util

import com.ning.http.client.cookie.Cookie
import com.ning.http.client.{ FluentCaseInsensitiveStringsMap, Response }

import scala.collection.immutable.HashMap

class MockResponse(val body: String, val status: Int = 200, val header: Map[String, String] = new HashMap[String, String]) extends Response {

  override def getResponseBodyExcerpt(maxLength: Int, charset: String): String = ???

  override def getResponseBodyExcerpt(maxLength: Int): String = ???

  override def getResponseBodyAsByteBuffer: ByteBuffer = ???

  override def getStatusCode: Int = status

  override def getResponseBodyAsBytes: Array[Byte] = ???

  override def getResponseBodyAsStream: InputStream = ???

  override def isRedirected: Boolean = ???

  override def getCookies: util.List[Cookie] = ???

  override def hasResponseBody: Boolean = body != null

  override def getStatusText: String = ???

  override def getHeaders(name: String): util.List[String] = ???

  override def getHeaders: FluentCaseInsensitiveStringsMap = ???

  override def hasResponseHeaders: Boolean = ???

  override def getResponseBody(charset: String): String = ???

  override def getResponseBody: String = body

  override def getContentType: String = "UTF-8"

  override def hasResponseStatus: Boolean = true

  override def getUri: URI = ???

  override def getHeader(name: String): String = header(name)
}

RequestSpec.scala

// Example for lukaseichler.de/how-to-test-dispatch-request/

import dispatch.{HttpExecutor, _}
import dispatch.Defaults._
 
val httpMock = mock[HttpExecutor]
(httpMock.apply(_: (Request, AsyncHandler[Response]))(_: ExecutionContext))
.expects(*, *)
.returning(Future[Response] {
  new MockResponse("Hello World")
})
 
class Foo(http: HttpExecutor = Http) // Allow to override default HttpExecutor