Plug.Upload Tests (not Phoenix)

Hey all,

I’m trying to utilise Plug.Upload in a Plug only webserver, but I’m having issues with it. If I do the following in the handler:

{:ok, body, conn} <- Plug.Conn.read_body(conn)

and have a test like this:

      upload = %Plug.Upload{
        path: "test/support/rgb.jpg",
        filename: "example.jpg",
        content_type: "image/jpeg"
      }

      conn =
        :post
        |> conn(path("/file"), file: upload)
        |> Server.call(@opts)

      assert json_response(conn, 200)

Then the body variable contains simply:

"--plug_conn_test--"

Does anyone have an example or know of one where Plug.Upload is demonstrated with unit test (not in a Phoenix app)?

Many thanks