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-rw-r--r--test/test_ics.ml45
1 files changed, 44 insertions, 1 deletions
diff --git a/test/test_ics.ml b/test/test_ics.ml
index ac0c9ee..7d1ca37 100644
--- a/test/test_ics.ml
+++ b/test/test_ics.ml
@@ -88,6 +88,47 @@ let test_dtstamp_is_a_parameter () =
Alcotest.(check int) "default is deterministic" 365
(count_prefix "DTSTAMP:20270101T000000Z" (lines (out_2027 ())))
+(* F1 (fix round 1, 2026-08-19): 9999 is the domain's own last civil year.
+ Its last VEVENT's successor date (10000-01-01) falls outside the
+ 1583..9999 domain [Date.make] enforces (date.mli) -- [Date.add_days] is
+ itself unbounded, and [to_iso8601] pads but never truncates, so the naive
+ successor string would be 9 digits, not 8. RFC 5545 section 3.6.1 makes a
+ DATE-valued DTSTART with neither DTEND nor DURATION mean exactly one day,
+ so [dtend_of] omits the DTEND line entirely for that one event rather than
+ emit it malformed. *)
+let out_9999 () = Ics.year (Test_view.view_of 9999)
+
+let test_dtend_omitted_at_domain_end () =
+ let ls = Array.of_list (lines (out_9999 ())) in
+ let n = Array.length ls in
+ let idx = ref (-1) in
+ Array.iteri (fun i l -> if l = "DTSTART;VALUE=DATE:99991231" then idx := i) ls;
+ if !idx < 0 then Alcotest.fail "DTSTART;VALUE=DATE:99991231 not found";
+ let next_line = if !idx + 1 < n then ls.(!idx + 1) else "" in
+ Alcotest.(check bool) "no DTEND line follows DTSTART 99991231" true
+ (count_prefix "DTEND;VALUE=DATE:" [ next_line ] = 0);
+ Alcotest.(check bool) "SUMMARY follows DTSTART directly instead" true
+ (count_prefix "SUMMARY:" [ next_line ] = 1)
+
+(* The general form of F1's bug class: every DTEND value anywhere in the
+ feed must be an 8-digit YYYYMMDD, never 9 (a future domain-boundary
+ regression anywhere else in 1583..9999 would show up here too). *)
+let test_all_9999_dtends_are_eight_digits () =
+ let ls = lines (out_9999 ()) in
+ let prefix = "DTEND;VALUE=DATE:" in
+ let ends =
+ List.filter_map
+ (fun l ->
+ if count_prefix prefix [ l ] = 1 then
+ Some (String.sub l (String.length prefix) (String.length l - String.length prefix))
+ else None)
+ ls
+ in
+ Alcotest.(check bool) "at least one DTEND present in 9999" true (List.length ends > 0);
+ List.iter
+ (fun v -> if String.length v <> 8 then Alcotest.failf "DTEND value %S is %d digits, not 8" v (String.length v))
+ ends
+
let suite =
( "Emit/ics",
[ Alcotest.test_case "envelope" `Quick test_envelope;
@@ -97,4 +138,6 @@ let suite =
Alcotest.test_case "folded and CRLF" `Quick test_every_line_folded_and_crlf;
Alcotest.test_case "no RRULE" `Quick test_no_rrule;
Alcotest.test_case "text escaped" `Quick test_text_escaped;
- Alcotest.test_case "DTSTAMP is a parameter" `Quick test_dtstamp_is_a_parameter ] )
+ Alcotest.test_case "DTSTAMP is a parameter" `Quick test_dtstamp_is_a_parameter;
+ Alcotest.test_case "DTEND omitted at domain end" `Quick test_dtend_omitted_at_domain_end;
+ Alcotest.test_case "all 9999 DTENDs are eight digits" `Quick test_all_9999_dtends_are_eight_digits ] )