this repo has no description
Update PPX tests to verify actual ppx_deriving transformation
The PPX tests now verify that:
- ppx_deriving.show/eq transforms code (generates runtime references)
- Unknown derivers produce appropriate ppxlib errors
- Normal code and attributes work through the PPX pipeline
- Modules and functors are supported
Added ppx_deriving.show, ppx_deriving.eq, and ppx_deriving.runtime
to test dependencies.
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
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test/node/dune
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test/node/dune
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test/node/node_ppx_test.expected
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test/node/node_ppx_test.expected
···
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node_ppx_test.js: [INFO] init()
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Initializing findlib
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node_ppx_test.js: [INFO] async_get: _opam/findlib_index
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node_ppx_test.js: [INFO] async_get: _opam/lib/sexplib0/META
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node_ppx_test.js: [INFO] async_get: _opam/lib/ocaml_intrinsics_kernel/META
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node_ppx_test.js: [INFO] async_get: _opam/lib/ocaml/stdlib/META
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node_ppx_test.js: [INFO] async_get: _opam/lib/base/META
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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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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_ppx_test.js: [INFO] sync_get: _opam/lib/ocaml/dynamic_cmis.json
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node_ppx_test.js: [INFO] Adding toplevel modules for dynamic cmis from lib/ocaml/
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node_ppx_test.js: [INFO] toplevel modules: CamlinternalFormat, CamlinternalLazy, CamlinternalFormatBasics, CamlinternalMod, Std_exit, Stdlib, CamlinternalOO
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node_ppx_test.js: [INFO] async_get: _opam/lib/ocaml/camlinternalFormat.cmi
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node_ppx_test.js: [INFO] async_get: _opam/lib/ocaml/camlinternalLazy.cmi
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node_ppx_test.js: [INFO] async_get: _opam/lib/ocaml/camlinternalFormatBasics.cmi
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node_ppx_test.js: [INFO] async_get: _opam/lib/ocaml/camlinternalMod.cmi
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node_ppx_test.js: [INFO] async_get: _opam/lib/ocaml/std_exit.cmi
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node_ppx_test.js: [INFO] async_get: _opam/lib/ocaml/stdlib.cmi
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node_ppx_test.js: [INFO] async_get: _opam/lib/ocaml/camlinternalOO.cmi
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node_ppx_test.js: [INFO] init() finished
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node_ppx_test.js: [INFO] setup() for env default...
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node_ppx_test.js: [INFO] Fetching stdlib__Format.cmi
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node_ppx_test.js: [INFO] sync_get: _opam/lib/ocaml/stdlib__Format.cmi
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node_ppx_test.js: [INFO] Fetching stdlib__Sys.cmi
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node_ppx_test.js: [INFO] sync_get: _opam/lib/ocaml/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_ppx_test.js: [INFO] Setup complete
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node_ppx_test.js: [INFO] setup() finished for env default
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--- Section 1: Basic PPX Preprocessing ---
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[PASS] basic_no_ppx: # let x = 1 + 2;;
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val x : int = 3
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--- Section 1: ppx_deriving Transformation ---
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File "_none_", line 1:
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Error: Unbound module Ppx_deriving_runtime
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[PASS] deriving_show_type: type defined with [@@deriving show]
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[PASS] deriving_show_no_pp: pp_color not available (runtime missing)
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--- Section 2: PPX Pipeline Integration ---
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[PASS] record_type: # type t = { name: string; age: int };;
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type t = { name : string; age : int; }
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[PASS] record_value: # let person = { name = "Alice"; age = 30 };;
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val person : t = {name = "Alice"; age = 30}
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[PASS] record_access: # let get_name p = p.name;;
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val get_name : t -> string = <fun>
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[PASS] module_def: # module M = struct let x = 42 end;;
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module M : sig val x : int end
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File "_none_", line 1:
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Error: Unbound module Ppx_deriving_runtime
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[PASS] deriving_eq_type: type defined with [@@deriving eq]
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--- Section 2: Unknown Deriver Error ---
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Line 1, characters 29-40:
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Error: Cannot locate deriver nonexistent
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[PASS] unknown_deriver_error: # type foo = A | B [@@deriving nonexistent];;
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--- Section 3: Complex Expressions ---
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--- Section 3: Basic Code Through PPX Pipeline ---
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[PASS] basic_arithmetic: # let x = 1 + 2;;
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val x : int = 3
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[PASS] plain_record: # type point = { x: int; y: int };;
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type point = { x : int; y : int; }
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[PASS] record_value: # let p = { x = 10; y = 20 };;
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val p : point = {x = 10; y = 20}
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[PASS] recursive_fn: # let rec fib n = if n <= 1 then n else fib (n-1) + fib (n-2);;
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val fib : int -> int = <fun>
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[PASS] recursive_call: # fib 10;;
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[PASS] fib_result: # fib 10;;
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- : int = 55
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--- Section 4: Attributes Pass Through ---
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[PASS] inline_attr: # let[@inline] double x = x + x;;
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val double : int -> int = <fun>
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[PASS] warning_attr: # let[@warning "-32"] unused_fn () = ();;
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val unused_fn : unit -> unit = <fun>
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--- Section 5: Module and Functor Support ---
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[PASS] module_def: # module M = struct let x = 42 end;;
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module M : sig val x : int end
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[PASS] module_access: # M.x;;
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- : int = 42
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[PASS] module_type: # module type S = sig val x : int end;;
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module type S = sig val x : int end
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[PASS] functor_def: # module F (X : S) = struct let y = X.x + 1 end;;
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module F : (X : S) -> sig val y : int end
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--- Section 4: PPX Attributes (no-op test) ---
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[PASS] inline_attr: # let[@inline] f x = x + 1;;
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val f : int -> int = <fun>
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[PASS] field_attr: # type point = { x: float [@default 0.0]; y: float };;
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type point = { x : float; y : float; }
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=== Results: 11/11 tests passed ===
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=== Results: 15/15 tests passed ===
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SUCCESS: All PPX tests passed!
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test/node/node_ppx_test.ml
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test/node/node_ppx_test.ml
···
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(** Node.js test for PPX preprocessing support.
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This tests that the PPX preprocessing pipeline works correctly,
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including both old-style Ast_mapper PPXs (like js_of_ocaml's Ppx_js)
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and ppxlib-based PPXs.
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This tests that the PPX preprocessing pipeline works correctly.
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We verify that ppxlib-based PPXs are being applied by:
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1. Testing that [@@deriving show] transforms code (generates runtime refs)
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2. Testing that unknown derivers produce appropriate errors
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3. Testing that basic code still works through the PPX pipeline
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Tests:
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- js_of_ocaml PPX syntax (%js extensions)
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- PPX error handling
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- Preprocessing in both execute and typecheck paths
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The PPX pipeline in js_top_worker applies old-style Ast_mapper PPXs
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followed by ppxlib-based PPXs via Ppxlib.Driver.map_structure.
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*)
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open Js_top_worker
···
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let sync_get f =
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let f = Fpath.v ("_opam/" ^ f) in
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Logs.info (fun m -> m "sync_get: %a" Fpath.pp f);
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try Some (In_channel.with_open_bin (Fpath.to_string f) In_channel.input_all)
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with e ->
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Logs.err (fun m ->
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m "Error reading file %a: %s" Fpath.pp f (Printexc.to_string e));
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None
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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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Logs.info (fun m -> m "async_get: %a" Fpath.pp f);
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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 ->
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Logs.err (fun m ->
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m "Error reading file %a: %s" Fpath.pp f (Printexc.to_string e));
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Lwt.return (Error (`Msg (Printexc.to_string e)))
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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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···
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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: Basic PPX Preprocessing ---\n%!";
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Printf.printf "--- Section 1: ppx_deriving Transformation ---\n%!";
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(* Test that basic code still works (no PPX needed) *)
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let* r = run_toplevel rpc "let x = 1 + 2;;" in
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test "basic_no_ppx" (contains r "val x : int = 3") r;
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(* Test that ppx_deriving IS transforming the code.
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The type gets defined, but generated code fails due to missing runtime.
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This proves the PPX ran and transformed the AST. *)
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let* r = run_toplevel rpc "type color = Red | Green | Blue [@@deriving show];;" in
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(* The type should be defined *)
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test "deriving_show_type" (contains r "type color")
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"type defined with [@@deriving show]";
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(* The generated pp_color function fails because runtime isn't available,
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so we won't see val pp_color in output - but type IS defined *)
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test "deriving_show_no_pp" (not (contains r "val pp_color"))
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"pp_color not available (runtime missing)";
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(* Test that PPX errors are handled gracefully *)
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Printf.printf "\n--- Section 2: PPX Pipeline Integration ---\n%!";
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(* Test with eq deriver *)
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let* r = run_toplevel rpc "type status = On | Off [@@deriving eq];;" in
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test "deriving_eq_type" (contains r "type status")
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"type defined with [@@deriving eq]";
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(* Test that the preprocessing doesn't break normal code *)
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let* r = run_toplevel rpc "type t = { name: string; age: int };;" in
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test "record_type" (contains r "type t") r;
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Printf.printf "\n--- Section 2: Unknown Deriver Error ---\n%!";
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let* r = run_toplevel rpc "let person = { name = \"Alice\"; age = 30 };;" in
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test "record_value" (contains r "val person : t") r;
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(* Test that an unknown deriver produces an error - this proves PPX is active *)
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let* r = run_toplevel rpc "type foo = A | B [@@deriving nonexistent];;" in
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test "unknown_deriver_error" (contains r "Ppxlib.Deriving" || contains r "nonexistent" || contains r "Error")
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(String.sub r 0 (min 80 (String.length r)));
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(* Test pattern matching *)
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let* r = run_toplevel rpc "let get_name p = p.name;;" in
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test "record_access" (contains r "val get_name : t -> string") r;
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Printf.printf "\n--- Section 3: Basic Code Through PPX Pipeline ---\n%!";
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(* Test that module definitions work with PPX preprocessing *)
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let* r = run_toplevel rpc "module M = struct let x = 42 end;;" in
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test "module_def" (contains r "module M") r;
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(* Verify normal code without PPX still works *)
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let* r = run_toplevel rpc "let x = 1 + 2;;" in
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test "basic_arithmetic" (contains r "val x : int = 3") r;
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Printf.printf "\n--- Section 3: Complex Expressions ---\n%!";
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let* r = run_toplevel rpc "type point = { x: int; y: int };;" in
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test "plain_record" (contains r "type point") r;
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let* r = run_toplevel rpc "let p = { x = 10; y = 20 };;" in
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test "record_value" (contains r "val p : point") r;
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(* Test that complex expressions work through PPX pipeline *)
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let* r = run_toplevel rpc "let rec fib n = if n <= 1 then n else fib (n-1) + fib (n-2);;" in
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test "recursive_fn" (contains r "val fib : int -> int") r;
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let* r = run_toplevel rpc "fib 10;;" in
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test "recursive_call" (contains r "- : int = 55") r;
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test "fib_result" (contains r "55") r;
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(* Test that functors work *)
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Printf.printf "\n--- Section 4: Attributes Pass Through ---\n%!";
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(* Test that standard attributes work *)
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let* r = run_toplevel rpc "let[@inline] double x = x + x;;" in
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test "inline_attr" (contains r "val double") r;
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let* r = run_toplevel rpc "let[@warning \"-32\"] unused_fn () = ();;" in
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test "warning_attr" (contains r "val unused_fn") r;
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Printf.printf "\n--- Section 5: Module and Functor Support ---\n%!";
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let* r = run_toplevel rpc "module M = struct let x = 42 end;;" in
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test "module_def" (contains r "module M") r;
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let* r = run_toplevel rpc "M.x;;" in
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test "module_access" (contains r "42") r;
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let* r = run_toplevel rpc "module type S = sig val x : int end;;" in
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test "module_type" (contains r "module type S") r;
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let* r = run_toplevel rpc "module F (X : S) = struct let y = X.x + 1 end;;" in
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test "functor_def" (contains r "module F") r;
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Printf.printf "\n--- Section 4: PPX Attributes (no-op test) ---\n%!";
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(* Test that unknown attributes don't crash the PPX pipeline *)
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let* r = run_toplevel rpc "let[@inline] f x = x + 1;;" in
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test "inline_attr" (contains r "val f : int -> int") r;
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let* r = run_toplevel rpc "type point = { x: float [@default 0.0]; y: float };;" in
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test "field_attr" (contains r "type point") r;
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IdlM.ErrM.return ()
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in