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rose-ash/lib/commerce/tests/catalog.sx
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commerce: catalog facts + multidirectional relations + conformance harness (16 tests)
catalog.sx — catalog snapshot (products/variants/stock as fact tuples),
relational accessors (producto/varianto/stocko, derived priceo/classo/
unit-priceo) usable forward and backward, deterministic catalog-price/
-class/-has? helpers. Money is integer minor units. conformance.sh runs
suites on the miniKanren stack and emits scoreboard.{json,md}.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
2026-06-06 23:41:04 +00:00

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;; lib/commerce/tests/catalog.sx — catalog facts + relational accessors.
;; Uses (commerce-test name got expected) provided by conformance.sh.
;; Query vars avoid the name `s` (the run-n macro binds `s` internally).
(define
cat
(make-catalog
(list
(list "widget" 1000 :standard)
(list "gadget" 2500 :standard)
(list "book" 800 :zero-rated)
(list "tea" 1000 :reduced))
(list
(list "widget" :small -200)
(list "widget" :large 500)
(list "gadget" :std 0))
(list
(list "widget" :small 5)
(list "widget" :large 0)
(list "gadget" :std 12))))
;; --- forward lookups ---
(commerce-test
"price-forward"
(run* p (priceo cat "widget" p))
(list 1000))
(commerce-test
"class-forward"
(run* c (classo cat "book" c))
(list :zero-rated))
(commerce-test
"product-forward"
(run* q (fresh (p c) (producto cat "gadget" p c) (== q (list p c))))
(list (list 2500 :standard)))
;; --- backward lookups (the showcase) ---
(commerce-test
"sku-by-price-backward"
(run* sk (priceo cat sk 1000))
(list "widget" "tea"))
(commerce-test
"sku-by-class-backward"
(run* sk (classo cat sk :standard))
(list "widget" "gadget"))
(commerce-test
"all-prices"
(run* p (fresh (sk) (priceo cat sk p)))
(list 1000 2500 800 1000))
;; --- variants + effective unit price ---
(commerce-test
"variant-delta-forward"
(run* d (varianto cat "widget" :small d))
(list -200))
(commerce-test
"unit-price-small"
(run* p (unit-priceo cat "widget" :small p))
(list 800))
(commerce-test
"unit-price-large"
(run* p (unit-priceo cat "widget" :large p))
(list 1500))
(commerce-test
"variant-by-delta-backward"
(run* v (varianto cat "widget" v -200))
(list :small))
;; --- stock ---
(commerce-test
"stock-forward"
(run* q (stocko cat "widget" :small q))
(list 5))
(commerce-test
"in-stock-skus-backward"
(run* sk (fresh (v q) (stocko cat sk v q) (lto-i 0 q)))
(list "widget" "gadget"))
;; --- deterministic helpers ---
(commerce-test "catalog-price-helper" (catalog-price cat "gadget") 2500)
(commerce-test "catalog-class-helper" (catalog-class cat "tea") :reduced)
(commerce-test "catalog-has-yes" (catalog-has? cat "book") true)
(commerce-test "catalog-has-no" (catalog-has? cat "nonesuch") false)