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|
(.module:
[lux #*
["%" data/text/format (#+ format)]
["_" test (#+ Test)]
[math
["." random (#+ Random)]]
[abstract
[monad (#+ do)]
[equivalence (#+ Equivalence)]]
[data
["." bit]
["." maybe]
[number
["n" nat]
["i" int]]
["." text]
[collection
["." list]]]
["." macro
[poly (#+ derived:)]]]
{1
["." /]})
(type: Variant
(#Case0 Bit)
(#Case1 Int)
(#Case2 Frac))
(type: #rec Recursive
(#Number Frac)
(#Addition Frac Recursive))
(type: Record
{#bit Bit
#int Int
#frac Frac
#text Text
#maybe (Maybe Int)
#list (List Int)
#variant Variant
#tuple [Int Frac Text]
#recursive Recursive})
(def: gen-recursive
(Random Recursive)
(random.rec (function (_ gen-recursive)
(random.or random.frac
(random.and random.frac gen-recursive)))))
(def: gen-record
(Random Record)
(do random.monad
[size (:: @ map (n.% 2) random.nat)
#let [gen-int (|> random.int (:: @ map (|>> i.abs (i.% +1,000,000))))]]
($_ random.and
random.bit
gen-int
random.frac
(random.unicode size)
(random.maybe gen-int)
(random.list size gen-int)
($_ random.or random.bit gen-int random.frac)
($_ random.and gen-int random.frac (random.unicode size))
gen-recursive)))
(derived: equivalence (/.equivalence Record))
(def: #export test
Test
(<| (_.context (%.name (name-of /._)))
(do random.monad
[sample gen-record
#let [(^open "/@.") ..equivalence]]
(_.test "Every instance equals itself."
(/@= sample sample)))))
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