Add chunk funciton

src/webtest.gleam

@@ -4,6 +4,7 @@ import gleam/erlang/process
 import gleam/http
 import gleam/http/request.{type Request}
 import gleam/http/response.{type Response}
+import gleam/int
 import gleam/io
 import gleam/iterator
 import gleam/option.{None, Some}
@@ -84,3 +85,14 @@ fn echo_body(request: Request(Connection)) -> Response(ResponseData) {
     |> response.set_body(mist.Bytes(bytes_builder.new()))
   })
 }
+
+fn serve_chunk(_request: Request(Connection)) -> Response(ResponseData) {
+  let iter =
+    ["one", "two", "three"]
+    |> iterator.from_list
+    |> iterator.map(bytes_builder.from_string)
+
+  response.new(200)
+  |> response.set_body(mist.Chunked(iter))
+  |> response.set_header("content-type", "text/plain")
+}