Spray MultipartFormData Spec - scala

Question

I have a spray endpoint which accepts a MultipartFormData like this:
trait ApiRouting extends Routing with ResultService with FormDataUnmarshallers {
override def route: Route =
path("test") {
post {
entity(as[MultipartFormData]) { formData =>
complete(handleRequest(formData))
}
}
}
}
This works fine when I post via postman. However, I am trying to write a spec that tests this endpoint and get this error:
java.lang.ClassCastException: spray.http.HttpEntity$Empty$ cannot be
cast to spray.http.HttpEntity$NonEmpty
This is what I have:
trait Context extends Scope with ApiRouting {}
"check post request" should {
"return response data for post request" in new Context {
val file = new File("test")
val httpEntity = HttpEntity(MediaTypes.`multipart/form-data`, HttpData(file)).asInstanceOf[HttpEntity.NonEmpty]
val formFile = FormFile("file", httpEntity)
val mfd = MultipartFormData(Seq(BodyPart(formFile, "file")))
Post("/test", mfd) ~> route ~> check {
status must_== StatusCodes.OK
contentType must_== `multipart/form-data`
}
}
}
Any ideas on how to test a spray multipart form data?

Answer 1

It's happening because your are passing zero-length file into HttpData. Try to refer to a real file.
Also, you can pass your File directly into BodyPart. It will looks like:
Post(Uri("/test"),
MultipartFormData(
Seq(BodyPart(file, "file", ContentType(MediaTypes.`application/xml`)))
)
)