path: root/test/test_rite_ef.ml

(* Coordinator review (Task 11 fix round): integration tests wiring
   [Rite_ef.context] together with the REAL data/ef/sanctoral.sexp +
   data/ef/adjustments.sexp through [Colitur_kernel.Calendar] -- the same
   pipeline `colitur day` uses, proven here at the OCaml level so these
   properties are pinned by the test suite, not merely observable in CLI
   output (which is exactly what finding 3 flagged: with the overlay's one
   directive replaced by [()], `colitur day 2026`'s stdout is byte-identical
   for all 365 days, since [ef-nativity-vigil] always outranks
   [vigil-of-christmas] regardless -- the suppression's only observable
   effect is on [Liturgical_day.omitted], which no cram assertion reads). *)

module Cal = Colitur_kernel.Calendar
module Layer = Colitur_kernel.Layer
module Overlay = Colitur_kernel.Overlay
module LD = Colitur_kernel.Liturgical_day
module Slug = Colitur_kernel.Slug
module Date = Colitur_kernel.Date
module Date_spec = Colitur_kernel.Date_spec
module Cel = Colitur_kernel.Celebration
module Colour = Colitur_kernel.Colour
module Subject = Colitur_kernel.Subject
module P = Colitur_kernel.Precedence
module Comp = Colitur_kernel.Computus
module V = Rite_ef.Vocab_ef
module T = Rite_ef.Temporal_ef
module PE = Rite_ef.Precedence_ef

(* Relative to this test's own build directory (_build/default/test/), same
   convention test_sanctoral_ef.ml uses -- test/dune declares both as deps
   of the (test ...) stanza. *)
let sanctoral_path = "../data/ef/sanctoral.sexp"
let adjustments_path = "../data/ef/adjustments.sexp"

let mk y m d = match Date.make ~year:y ~month:m ~day:d with Ok t -> t | Error e -> failwith e

let real_layer () =
  let layer =
    match Layer.load V.rank_of_sexp sanctoral_path with
    | Ok l -> l
    | Error e -> Alcotest.failf "%s: failed to load: %s" sanctoral_path e
  in
  let overlay =
    match Overlay.load V.rank_of_sexp adjustments_path with
    | Ok o -> o
    | Error e -> Alcotest.failf "%s: failed to load: %s" adjustments_path e
  in
  let layer, diagnostics = Overlay.apply layer overlay in
  Alcotest.(check (list string)) "the committed overlay applies cleanly, no diagnostics" []
    (List.map Overlay.diagnostic_to_string diagnostics);
  layer

let slug_of (c : V.rank Cel.t) = Slug.to_string c.Cel.slug

(* Finding 3: the suppression's ONLY observable effect is on 24 December's
   [omitted] (and, belt-and-braces, on every OTHER field of every OTHER day
   too -- vigil-of-christmas must not surface anywhere at all, since the
   overlay removes it from the layer before resolution ever runs, unlike an
   ordinary occurrence loss). Mutation-verified (see the task report):
   substituting `(directives ())` for the real overlay makes this test's
   first assertion fail (24 December's [omitted] gains
   "vigil-of-christmas"), and confirmed the whole cram suite (test/cli.t)
   still passes under that same mutation -- so this closes the "removing
   the deliverable breaks no test" gap the coordinator flagged, which cram
   alone structurally cannot. *)
let test_vigil_of_christmas_suppressed () =
  let layer = real_layer () in
  let days = Cal.year Rite_ef.context layer 2026 in
  let christmas_eve =
    Array.to_list days |> List.find (fun d -> Date.compare d.LD.date (mk 2026 12 24) = 0)
  in
  Alcotest.(check string) "ef-nativity-vigil is still the observed day" "ef-nativity-vigil"
    (slug_of christmas_eve.LD.observed);
  Alcotest.(check (list string))
    "24 December has nothing omitted -- vigil-of-christmas never enters the RG91 contest at all"
    []
    (List.map (fun (c, _) -> slug_of c) christmas_eve.LD.omitted);
  let appears_anywhere =
    Array.to_list days
    |> List.exists (fun d ->
           let is_it c = slug_of c = "vigil-of-christmas" in
           is_it d.LD.observed
           || List.exists (fun (c, _) -> is_it c) d.LD.commemorations
           || List.exists (fun (c, _) -> is_it c) d.LD.omitted
           || (match d.LD.transferred_in with Some c -> is_it c | None -> false)
           || List.exists (fun (c, _) -> is_it c) d.LD.transferred_out)
  in
  Alcotest.(check bool) "vigil-of-christmas appears NOWHERE in the resolved year" false
    appears_anywhere

(* RG16(a) task (register §6.0 + the sanctoral subject audit, this task's
   own report): data/ef/sanctoral.sexp is left untouched (still a faithful
   mirror of lectio, subject `Lord` for both entries below -- see
   test_sanctoral_ef.ml's own "explicit class = lord" spot-check, which
   loads that file WITHOUT applying this overlay and still passes); the
   correction lives entirely in data/ef/adjustments.sexp's two [Edit]
   directives, the same mechanism [test_vigil_of_christmas_suppressed]
   above already proves for a sibling bootstrap defect. This is the ONE
   test in the suite that observes the two retags actually take effect
   through the real pipeline -- without it, a typo in either directive's
   slug (silently a no-op diagnostic, not a hard failure -- Overlay.apply's
   own contract) or a reverted adjustments.sexp would leave every other
   test green (2 February isn't a Sunday in any golden-pinned year, and
   [test_sanctoral_ef.ml] deliberately never applies the overlay). Also
   re-verifies the four entries the audit confirmed correct and left
   untouched, so a future accidental retag of one of THEM would be caught
   here too, not just the two that changed. *)
let test_rg16a_subject_retag_in_effect () =
  let layer = real_layer () in
  let subject_of slug =
    match Layer.find layer (Slug.of_string_exn slug) with
    | Some e -> e.Layer.cel.Cel.subject
    | None -> Alcotest.failf "slug %s not found in the overlaid layer" slug
  in
  Alcotest.(check bool) "Purification retagged Bvm (calendarium: \"B. MARIAE VIRG.\")" true
    (subject_of "purification-of-the-blessed-virgin-mary" = Subject.Bvm);
  Alcotest.(check bool) "Most Holy Name of Mary retagged Bvm (calendarium: \"Nominis Mariae\")" true
    (subject_of "most-holy-name-of-mary" = Subject.Bvm);
  Alcotest.(check bool) "Precious Blood stays Lord (calendarium: \"D. N. I. C.\") -- audit, not touched" true
    (subject_of "precious-blood-of-our-lord-jesus-christ" = Subject.Lord);
  Alcotest.(check bool) "Transfiguration stays Lord (calendarium: \"D. N. I. C.\") -- audit, not touched" true
    (subject_of "transfiguration-of-our-lord" = Subject.Lord);
  Alcotest.(check bool) "Exaltation of the Holy Cross stays Lord -- audit, not touched" true
    (subject_of "exaltation-of-the-holy-cross" = Subject.Lord);
  Alcotest.(check bool)
    "Dedication of the Archbasilica of the Most Holy Saviour stays Lord -- audit, not touched" true
    (subject_of "dedication-of-the-archbasilica-of-our-holy-savior" = Subject.Lord)

(* Coordinator review, finding 2, reproduced through the project's OWN
   extension path (an overlay), the same way the reviewer found it: adding
   an I-class feast on 25 December (competing against, and losing to, the
   real Nativity) forces an RG 96 search starting 26 December -- which, with
   the real sanctoral data (Stephen/John/the Innocents, all II class) plus
   the temporal cycle's own Nativity-octave-day entries (29-31 Dec, also II
   class), is blocking every single day through 31 December 9999. Before the
   domain-ceiling fix this raised (Computus: year 10000 out of range);
   confirmed by mutation-testing at the precedence_ef.ml unit level (see the
   task report) -- this is the same defect reproduced end to end, through
   Calendar, with real data, exactly as the review found it. *)
let test_transfer_search_does_not_raise_at_domain_ceiling () =
  let layer = real_layer () in
  let impeding_entry : V.rank Layer.entry =
    { Layer.date = (match Date_spec.fixed ~month:12 ~day:25 with Ok d -> d | Error e -> failwith e);
      cel =
        Cel.make ~slug:(Slug.of_string_exn "test-domain-ceiling-impeder") ~rank:V.Class1
          ~colour:Colour.White ~layer:Rite_ef.Precedence_ef.universal_layer () }
  in
  let overlay : V.rank Overlay.t =
    { Overlay.id = "test-domain-ceiling"; directives = [ Overlay.Add impeding_entry ] }
  in
  let layer, _diagnostics = Overlay.apply layer overlay in
  (* Must not raise -- the whole point of the fix. *)
  let days = Cal.year Rite_ef.context layer 9999 in
  Alcotest.(check bool) "year 9999 resolves without raising, even with an impeded Christmas Day"
    true (Array.length days > 0);
  let impeder_placed_or_recorded =
    Array.to_list days
    |> List.exists (fun d ->
           slug_of d.LD.observed = "test-domain-ceiling-impeder"
           || List.exists (fun (c, _) -> slug_of c = "test-domain-ceiling-impeder") d.LD.omitted)
  in
  Alcotest.(check bool) "the impeding candidate is accounted for (observed somewhere, or omitted \
                         with a recorded reason) -- never silently dropped"
    true impeder_placed_or_recorded

(* Task 11's re-review finding, closed here: [Precedence_ef.transfer_target]'s
   Annunciation/Easter condition (and, more generally, RG 96's whole "not I or
   II class" test) is correct only because [Temporal_ef] happens to make
   every day from Easter Sunday through Low Sunday (Easter+0..+7) blocking --
   Easter itself and Low Sunday via [named], every day between via
   [privileged_feria]. Nothing in the type system enforces that; a future
   edit narrowing [privileged_feria]'s Easter-octave range would silently let
   the RG 96 walk land a translated feast inside the octave. This tests the
   CONSEQUENCE (no day in that window ever receives one), not the mechanism
   ([privileged_feria] itself), so it stays sensitive to any way that
   consequence could break, not only the one code path that currently
   protects it. *)

let easter_offset (d : Date.t) =
  let easter = Comp.gregorian_easter (Date.year d) in
  Date.to_rata d - Date.to_rata easter

let in_easter_octave d = let off = easter_offset d in off >= 0 && off <= 7

(* 2005-2050: the project's own differential-testing window (CLAUDE.md),
   reused here as a deterministic, non-trivial sample -- 46 liturgical years,
   each with several genuine transfers (All Souls onto a Sunday, impeded
   universal feasts, and so on; test_precedence_ef.ml's own 21k-day manual
   review already confirmed "all 7 slugs that ever transfer have a verified
   rubrical cause" over a similar span), so this is not a vacuous sweep over
   years where nothing ever transfers. *)
let sample_years =
  let rec range a b = if a > b then [] else a :: range (a + 1) b in
  range 2005 2050

(* Property 1: no day in the resolved output, across the whole sample, is
   EVER a transfer's landing point inside [Easter, Easter+7] -- checked two
   ways. [transferred_out]'s own recorded target is what [transfer_target]
   itself returned (calendar.ml's [assignment], stored verbatim), so this is
   the more direct signal; [transferred_in] is also checked, in case some
   future Calendar change ever let the two disagree. *)
let test_no_transfer_lands_in_easter_octave () =
  let layer = real_layer () in
  let violations = ref [] in
  List.iter
    (fun y ->
      let days = Cal.year Rite_ef.context layer y in
      Array.iter
        (fun (d : (V.season, V.rank) LD.t) ->
          (match d.LD.transferred_in with
           | Some c when in_easter_octave d.LD.date ->
               violations :=
                 (Printf.sprintf "%s transferred_in on %s (Easter+%d)" (slug_of c)
                    (Date.to_iso8601 d.LD.date) (easter_offset d.LD.date))
                 :: !violations
           | _ -> ());
          List.iter
            (fun (c, target) ->
              if in_easter_octave target then
                violations :=
                  Printf.sprintf "%s transferred_out from %s to %s (Easter+%d)" (slug_of c)
                    (Date.to_iso8601 d.LD.date) (Date.to_iso8601 target) (easter_offset target)
                  :: !violations)
            d.LD.transferred_out)
        days)
    sample_years;
  Alcotest.(check (list string))
    "no day in [Easter, Easter+7] is ever a transfer's target, 2005-2050" [] (List.rev !violations)

(* Property 2, and the LIVE case: [PE.transfer_target] called directly, with
   an origin that genuinely starts the search INSIDE Holy Week -- Holy
   Thursday 2026 (Easter - 3), a date no real sanctoral entry in
   data/ef/sanctoral.sexp occupies (Holy Week carries none), so this is
   deliberately constructed, not found. [occupant] is the REAL
   [Temporal_ef.temporal] (not a synthetic stand-in), so the search is driven
   by the actual blocking shape [privileged_feria] produces, not a
   hand-picked one -- this is genuinely live: search_from walks origin+1
   (Good Friday, Easter-2) forward through every remaining day of Holy Week,
   all of Easter through Low Sunday (Easter+0..+7, all Class1), and only
   stops at Easter+8 (the Monday after Low Sunday), which [named] and
   [ferial_rank]/[privileged_feria] agree is Class4 -- confirmed below by
   checking the OCCUPANT's own rank there, not asserted blind. Without an
   origin inside the window itself, [search_from] could stop before ever
   reaching it and this test would prove nothing (the vacuity trap the task
   brief names explicitly) -- [test_search_genuinely_enters_the_window] pins
   that it does not stop early. *)
let holy_week_origin_2026 =
  let easter_2026 = Comp.gregorian_easter 2026 in
  Date.add_days easter_2026 (-3)

let real_occupant d = (T.temporal d).Colitur_kernel.Temporal.office

let test_transfer_target_skips_the_whole_easter_octave () =
  let easter_2026 = Comp.gregorian_easter 2026 in
  let c =
    { P.cel =
        Cel.make ~slug:(Slug.of_string_exn "test-impeded-in-holy-week") ~rank:V.Class1
          ~colour:Colour.White ~subject:Subject.Temporal ~layer:PE.universal_layer ();
      origin = P.Sanctoral }
  in
  let target = PE.transfer_target c holy_week_origin_2026 real_occupant in
  Alcotest.(check string) "lands on Easter + 8 (Monday after Low Sunday), past the entire octave"
    (Date.to_iso8601 (Date.add_days easter_2026 8)) (Date.to_iso8601 target);
  Alcotest.(check bool) "strictly after origin (rite.mli's own obligation)" true
    (Date.compare target holy_week_origin_2026 > 0);
  Alcotest.(check bool) "not inside [Easter, Easter+7]" false
    (let off = Date.to_rata target - Date.to_rata easter_2026 in
     off >= 0 && off <= 7)

(* The vacuity check itself: proves the search genuinely walked THROUGH the
   window rather than [search_from] having some other reason to stop before
   it (e.g. an off-by-one that happened to also land past the octave). Reads
   the real occupant's own rank at every day from the origin through
   Easter+7 and requires every one of them to be blocking (Class1 or
   Class2) -- if any single one were not, [search_from] would have stopped
   there instead of at Easter+8, and the test above would be passing for the
   wrong reason. *)
let test_search_genuinely_enters_the_window () =
  let easter_2026 = Comp.gregorian_easter 2026 in
  let rec days_from a b = if Date.compare a b > 0 then [] else a :: days_from (Date.add_days a 1) b in
  let walked = days_from (Date.add_days holy_week_origin_2026 1) (Date.add_days easter_2026 7) in
  Alcotest.(check bool)
    "every day from origin+1 through Easter+7 (the whole span search_from must cross) is blocking"
    true
    (List.for_all
       (fun d ->
         match (real_occupant d).Cel.rank with V.Class1 | V.Class2 -> true | V.Class3 | V.Class4 -> false)
       walked);
  Alcotest.(check bool)
    "the walked span is at least 8 days -- the octave alone (Easter..Easter+7), not a one-day hop"
    true (List.length walked >= 8)

let suite =
  ( "Rite_ef (real data: overlay-in-effect, domain-ceiling)",
    [ Alcotest.test_case "the overlay suppression is observably in effect" `Quick
        test_vigil_of_christmas_suppressed;
      Alcotest.test_case "RG16(a) task: the two subject retags are in effect, the other four untouched"
        `Quick test_rg16a_subject_retag_in_effect;
      Alcotest.test_case "RG96 search does not raise at the domain ceiling (real data)" `Quick
        test_transfer_search_does_not_raise_at_domain_ceiling;
      Alcotest.test_case "no transfer ever lands inside [Easter, Easter+7], 2005-2050" `Quick
        test_no_transfer_lands_in_easter_octave;
      Alcotest.test_case "transfer_target skips the whole Easter octave from inside Holy Week" `Quick
        test_transfer_target_skips_the_whole_easter_octave;
      Alcotest.test_case "the search genuinely enters the window (not vacuous)" `Quick
        test_search_genuinely_enters_the_window ] )