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rose-ash/lib/search/tests/highlight.sx
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search: highlight + snippet generation + 12 tests
highlight marks query-matching (normalized) tokens with [..]; snippet extracts a
context window around the first match. 178/178.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
2026-06-06 22:08:00 +00:00

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;; Extension — highlight + snippet over document text.
;; Text: "the quick brown fox jumps"
(define
hl-cases
(list
(list
"highlight two terms"
"highlight [\"quick\", \"fox\"] \"the quick brown fox jumps\""
"the [quick] brown [fox] jumps")
(list
"highlight none"
"highlight [] \"the quick brown fox jumps\""
"the quick brown fox jumps")
(list
"highlight absent term"
"highlight [\"zzz\"] \"the quick brown fox jumps\""
"the quick brown fox jumps")
(list
"highlight first token"
"highlight [\"the\"] \"the quick brown fox jumps\""
"[the] quick brown fox jumps")
(list
"highlight normalizes text"
"highlight [\"quick\"] \"The Quick, brown!\""
"the [quick] brown")
(list
"snippet around middle"
"snippet 1 [\"brown\"] \"the quick brown fox jumps\""
"quick [brown] fox")
(list
"snippet at start"
"snippet 1 [\"the\"] \"the quick brown fox jumps\""
"[the] quick brown")
(list
"snippet near end"
"snippet 1 [\"fox\"] \"the quick brown fox jumps\""
"brown [fox] jumps")
(list
"snippet ctx zero"
"snippet 0 [\"brown\"] \"the quick brown fox jumps\""
"[brown]")
(list
"snippet clamps at end"
"snippet 2 [\"jumps\"] \"the quick brown fox jumps\""
"brown fox [jumps]")
(list
"snippet no match shows head"
"snippet 1 [\"zzz\"] \"the quick brown fox jumps\""
"the quick brown")
(list
"snippet wide window"
"snippet 5 [\"brown\"] \"the quick brown fox jumps\""
"the quick [brown] fox jumps")))
(define
hl-results
(search-batch "" (map (fn (c) (nth c 1)) hl-cases)))
(map-indexed
(fn
(i c)
(hk-test (nth c 0) (nth hl-results i) (nth c 2)))
hl-cases)
{:fail hk-test-fail :pass hk-test-pass :fails hk-test-fails}