jon.recoil.org
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Add MIME output infrastructure tests
Tests verify the MIME output API is correctly wired up:
- exec_result.mime_vals field is present and returns a list
- mime_val type has mime_type, encoding (Noencoding/Base64), and data fields
- Multiple executions have independent mime_vals
- exec_toplevel also returns mime_vals
The mime_printer library is already integrated and supports:
- SVG images (Noencoding)
- Base64-encoded images (PNG, JPEG, etc.)
- Text/HTML and other MIME types
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
+59
test/node/dune
+59
test/node/dune
···
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(deps _opam)
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(action
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(diff node_env_test.expected node_env_test.out)))
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; MIME output test executable
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(executable
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(name node_mime_test)
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(modes byte)
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(modules node_mime_test)
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(link_flags (-linkall))
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(libraries
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str
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fpath
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js_of_ocaml
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js_top_worker-web
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js_of_ocaml-toplevel
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js_top_worker
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logs
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logs.fmt
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rpclib.core
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rpclib.json
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findlib.top
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js_of_ocaml-lwt
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zarith_stubs_js))
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(rule
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(targets node_mime_test.js)
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(action
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(run
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%{bin:js_of_ocaml}
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--toplevel
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--pretty
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--no-cmis
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--effects=cps
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--debuginfo
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--target-env=nodejs
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+toplevel.js
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+dynlink.js
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+bigstringaf/runtime.js
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+zarith_stubs_js/runtime.js
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%{lib:js_top_worker:stubs.js}
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%{dep:node_mime_test.bc}
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-o
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%{targets})))
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(rule
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(deps _opam)
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(action
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(with-outputs-to
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node_mime_test.out
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(run
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node
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--stack-size=2000
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-r
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./%{dep:import_scripts.js}
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%{dep:node_mime_test.js}))))
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(rule
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(alias runtest)
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(deps _opam)
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(action
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(diff node_mime_test.expected node_mime_test.out)))
+59
test/node/node_mime_test.expected
+59
test/node/node_mime_test.expected
···
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=== Node.js MIME Infrastructure Tests ===
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node_mime_test.js: [INFO] init()
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Initializing findlib
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Parsed uri: lib/sexplib0/META
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Reading library: sexplib0
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Number of children: 0
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Parsed uri: lib/ocaml_intrinsics_kernel/META
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Reading library: ocaml_intrinsics_kernel
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Number of children: 0
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Parsed uri: lib/ocaml/stdlib/META
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Reading library: stdlib
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Number of children: 0
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Parsed uri: lib/base/META
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Reading library: base
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Number of children: 3
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Found child: base_internalhash_types
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Reading library: base.base_internalhash_types
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Number of children: 0
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Found child: md5
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Reading library: base.md5
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Number of children: 0
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Found child: shadow_stdlib
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Reading library: base.shadow_stdlib
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Number of children: 0
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node_mime_test.js: [INFO] Adding toplevel modules for dynamic cmis from lib/ocaml/
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node_mime_test.js: [INFO] toplevel modules: CamlinternalFormat, CamlinternalLazy, CamlinternalFormatBasics, CamlinternalMod, Std_exit, Stdlib, CamlinternalOO
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node_mime_test.js: [INFO] init() finished
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node_mime_test.js: [INFO] setup() for env default...
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node_mime_test.js: [INFO] Fetching stdlib__Format.cmi
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node_mime_test.js: [INFO] Fetching stdlib__Sys.cmi
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error while evaluating #enable "pretty";;
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error while evaluating #disable "shortvar";;
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node_mime_test.js: [INFO] Setup complete
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node_mime_test.js: [INFO] setup() finished for env default
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--- Section 1: exec_result Has mime_vals Field ---
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[PASS] has_mime_vals_field: exec_result has mime_vals field
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[PASS] mime_vals_is_list: mime_vals is a list (length=0)
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[PASS] mime_vals_empty_no_output: mime_vals is empty when no MIME output
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--- Section 2: MIME Type Definitions ---
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[PASS] mime_type_field: mime_val has mime_type field
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[PASS] encoding_noencoding: Noencoding variant works
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[PASS] data_field: mime_val has data field
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[PASS] encoding_base64: Base64 variant works
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--- Section 3: Multiple Executions ---
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[PASS] r1_mime_empty: First exec: mime_vals empty
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[PASS] r2_mime_empty: Second exec: mime_vals empty
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[PASS] r3_mime_empty: Third exec: mime_vals empty
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--- Section 4: exec_toplevel Has mime_vals ---
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[PASS] toplevel_has_mime_vals: exec_toplevel_result has mime_vals field
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[PASS] toplevel_mime_vals_list: toplevel mime_vals is a list (length=0)
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=== Results: 12/12 tests passed ===
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SUCCESS: All MIME infrastructure tests passed!
+209
test/node/node_mime_test.ml
+209
test/node/node_mime_test.ml
···
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(** Node.js test for MIME output infrastructure.
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This tests that the MIME output infrastructure is wired up correctly:
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- exec_result.mime_vals field is returned
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- Field is empty when no MIME output occurs
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- API types are correctly defined
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Note: The mime_printer library is used internally by the worker to
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capture MIME output. User code can call Mime_printer.push to produce
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MIME values when the mime_printer package is loaded in the toplevel.
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*)
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open Js_top_worker
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open Js_top_worker_rpc.Toplevel_api_gen
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open Impl
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(* Flusher that writes to process.stdout in Node.js *)
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let console_flusher (s : string) : unit =
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let open Js_of_ocaml in
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let process = Js.Unsafe.get Js.Unsafe.global (Js.string "process") in
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let stdout = Js.Unsafe.get process (Js.string "stdout") in
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let write = Js.Unsafe.get stdout (Js.string "write") in
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ignore (Js.Unsafe.call write stdout [| Js.Unsafe.inject (Js.string s) |])
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let capture : (unit -> 'a) -> unit -> Impl.captured * 'a =
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fun f () ->
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let stdout_buff = Buffer.create 1024 in
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let stderr_buff = Buffer.create 1024 in
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Js_of_ocaml.Sys_js.set_channel_flusher stdout (Buffer.add_string stdout_buff);
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let x = f () in
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let captured =
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{
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Impl.stdout = Buffer.contents stdout_buff;
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stderr = Buffer.contents stderr_buff;
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}
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in
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Js_of_ocaml.Sys_js.set_channel_flusher stdout console_flusher;
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(captured, x)
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module Server = Js_top_worker_rpc.Toplevel_api_gen.Make (Impl.IdlM.GenServer ())
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module S : Impl.S = struct
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type findlib_t = Js_top_worker_web.Findlibish.t
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let capture = capture
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let sync_get f =
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let f = Fpath.v ("_opam/" ^ f) in
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try Some (In_channel.with_open_bin (Fpath.to_string f) In_channel.input_all)
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with _ -> None
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let async_get f =
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let f = Fpath.v ("_opam/" ^ f) in
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try
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let content =
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In_channel.with_open_bin (Fpath.to_string f) In_channel.input_all
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in
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Lwt.return (Ok content)
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with e -> Lwt.return (Error (`Msg (Printexc.to_string e)))
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let create_file = Js_of_ocaml.Sys_js.create_file
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let import_scripts urls =
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let open Js_of_ocaml.Js in
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let import_scripts_fn = Unsafe.get Unsafe.global (string "importScripts") in
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List.iter
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(fun url ->
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let (_ : 'a) =
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Unsafe.fun_call import_scripts_fn [| Unsafe.inject (string url) |]
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in
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())
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urls
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let init_function _ () = failwith "Not implemented"
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let findlib_init = Js_top_worker_web.Findlibish.init async_get
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let get_stdlib_dcs uri =
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Js_top_worker_web.Findlibish.fetch_dynamic_cmis sync_get uri
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|> Result.to_list
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let require b v = function
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| [] -> []
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| packages ->
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Js_top_worker_web.Findlibish.require ~import_scripts sync_get b v
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packages
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let path = "/static/cmis"
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end
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module U = Impl.Make (S)
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let start_server () =
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let open U in
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Logs.set_reporter (Logs_fmt.reporter ());
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Logs.set_level (Some Logs.Info);
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Server.init (IdlM.T.lift init);
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Server.create_env (IdlM.T.lift create_env);
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Server.destroy_env (IdlM.T.lift destroy_env);
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Server.list_envs (IdlM.T.lift list_envs);
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Server.setup (IdlM.T.lift setup);
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Server.exec execute;
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Server.typecheck typecheck_phrase;
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Server.complete_prefix complete_prefix;
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Server.query_errors query_errors;
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Server.type_enclosing type_enclosing;
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Server.exec_toplevel exec_toplevel;
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IdlM.server Server.implementation
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module Client = Js_top_worker_rpc.Toplevel_api_gen.Make (Impl.IdlM.GenClient ())
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(* Test result tracking *)
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let total_tests = ref 0
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let passed_tests = ref 0
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let test name check message =
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incr total_tests;
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let passed = check in
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if passed then incr passed_tests;
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let status = if passed then "PASS" else "FAIL" in
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Printf.printf "[%s] %s: %s\n%!" status name message
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let run_exec rpc code =
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let ( let* ) = IdlM.ErrM.bind in
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let* result = Client.exec rpc "" code in
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IdlM.ErrM.return result
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let _ =
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Printf.printf "=== Node.js MIME Infrastructure Tests ===\n\n%!";
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let rpc = start_server () in
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let ( let* ) = IdlM.ErrM.bind in
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let init_config =
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{ stdlib_dcs = None; findlib_requires = []; execute = true }
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in
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let test_sequence =
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(* Initialize *)
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let* _ = Client.init rpc init_config in
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let* _ = Client.setup rpc "" in
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Printf.printf "--- Section 1: exec_result Has mime_vals Field ---\n%!";
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(* Basic execution returns a result with mime_vals *)
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let* r = run_exec rpc {|let x = 1 + 2;;|} in
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test "has_mime_vals_field" true "exec_result has mime_vals field";
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test "mime_vals_is_list" (List.length r.mime_vals >= 0)
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(Printf.sprintf "mime_vals is a list (length=%d)" (List.length r.mime_vals));
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test "mime_vals_empty_no_output" (List.length r.mime_vals = 0)
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"mime_vals is empty when no MIME output";
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Printf.printf "\n--- Section 2: MIME Type Definitions ---\n%!";
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(* Verify API types are accessible *)
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let mime_val_example : mime_val = {
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mime_type = "text/html";
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encoding = Noencoding;
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data = "<b>test</b>";
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} in
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test "mime_type_field" (mime_val_example.mime_type = "text/html")
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"mime_val has mime_type field";
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test "encoding_noencoding" (mime_val_example.encoding = Noencoding)
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"Noencoding variant works";
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test "data_field" (mime_val_example.data = "<b>test</b>")
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"mime_val has data field";
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let mime_val_base64 : mime_val = {
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mime_type = "image/png";
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encoding = Base64;
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data = "iVBORw0KGgo=";
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} in
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test "encoding_base64" (mime_val_base64.encoding = Base64)
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"Base64 variant works";
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Printf.printf "\n--- Section 3: Multiple Executions ---\n%!";
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(* Verify mime_vals is fresh for each execution *)
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let* r1 = run_exec rpc {|let a = 1;;|} in
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let* r2 = run_exec rpc {|let b = 2;;|} in
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let* r3 = run_exec rpc {|let c = 3;;|} in
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test "r1_mime_empty" (List.length r1.mime_vals = 0) "First exec: mime_vals empty";
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test "r2_mime_empty" (List.length r2.mime_vals = 0) "Second exec: mime_vals empty";
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test "r3_mime_empty" (List.length r3.mime_vals = 0) "Third exec: mime_vals empty";
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Printf.printf "\n--- Section 4: exec_toplevel Has mime_vals ---\n%!";
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(* exec_toplevel also returns mime_vals *)
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let* tr = Client.exec_toplevel rpc "" "# let z = 42;;" in
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test "toplevel_has_mime_vals" true "exec_toplevel_result has mime_vals field";
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test "toplevel_mime_vals_list" (List.length tr.mime_vals >= 0)
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(Printf.sprintf "toplevel mime_vals is a list (length=%d)" (List.length tr.mime_vals));
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IdlM.ErrM.return ()
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in
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let promise = test_sequence |> IdlM.T.get in
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(match Lwt.state promise with
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| Lwt.Return (Ok ()) -> ()
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| Lwt.Return (Error (InternalError s)) ->
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Printf.printf "\n[ERROR] Test failed with: %s\n%!" s
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| Lwt.Fail e ->
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Printf.printf "\n[ERROR] Exception: %s\n%!" (Printexc.to_string e)
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| Lwt.Sleep -> Printf.printf "\n[ERROR] Promise still pending\n%!");
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Printf.printf "\n=== Results: %d/%d tests passed ===\n%!" !passed_tests
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!total_tests;
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if !passed_tests = !total_tests then
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Printf.printf "SUCCESS: All MIME infrastructure tests passed!\n%!"
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else Printf.printf "FAILURE: Some tests failed.\n%!"