Support texttest with OCaml

ocaml/dune-project

@@ -16,6 +16,5 @@
  (depends
    (ocaml (>= 4.08))
    dune
-   ppx_deriving
    (alcotest (>= 1.7.0))))
 

ocaml/gilded_rose.opam

@@ -12,7 +12,6 @@ bug-reports:
 depends: [
   "ocaml" {>= "4.08"}
   "dune" {>= "3.11"}
-  "ppx_deriving"
   "alcotest" {>= "1.7.0"}
   "odoc" {with-doc}
 ]

ocaml/lib/dune

@@ -1,3 +1,2 @@
 (library
- (preprocess (pps ppx_deriving.show))
  (name gilded_rose))

ocaml/lib/gilded_rose.ml

@@ -1,14 +1,23 @@
 module Item = struct
-  type t = { name : string; sell_in : int; quality : int } [@@deriving show]
+  type t = { name : string; sell_in : int; quality : int }
+
+  let show { name; sell_in; quality } =
+    Printf.printf "%s, %d, %d" name sell_in quality
 
   let v name sell_in quality = { name; sell_in; quality }
 end
 
 module Items = struct
-  type items = Item.t list [@@deriving show]
+  type items = Item.t list
 
   let v ?(items = []) () = items
-  let show items : string = show_items items
+
+  let show items =
+    List.iter
+      (fun item ->
+        Item.show item;
+        Printf.printf "\n")
+      items
 
   let update_quality items =
     let update_quality_items ({ name; sell_in; quality } as item : Item.t) =

texttests/config.gr

@@ -39,4 +39,7 @@ diff_program:meld
 #executable:${TEXTTEST_HOME}/php/fixtures/texttest_fixture.php
 #interpreter:php
 
+# Settings for the OCaml version
+# executable:${TEXTTEST_HOME}/ocaml/_build/default/bin/main.exe
+
 filename_convention_scheme:standard