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|
(.module:
lux
(lux [io]
(control [monad #+ do Monad]
[eq #+ Eq])
(data text/format
[bool]
[number "int/" Number<Int>]
[text]
[maybe]
(coll [list]))
["r" math/random]
[macro]
(macro [poly #+ derived:]
["&" poly/eq]))
lux/test)
## [Utils]
(type: Variant
(#Case0 Bool)
(#Case1 Int)
(#Case2 Frac))
(type: #rec Recursive
(#Number Frac)
(#Addition Frac Recursive))
(type: Record
{#unit Unit
#bool Bool
#int Int
#frac Frac
#text Text
#maybe (Maybe Int)
#list (List Int)
#variant Variant
#tuple [Int Frac Text]
#recursive Recursive})
(def: gen-recursive
(r.Random Recursive)
(r.rec (function [gen-recursive]
(r.alt r.frac
(r.seq r.frac gen-recursive)))))
(def: gen-record
(r.Random Record)
(do r.Monad<Random>
[size (:: @ map (n/% +2) r.nat)
#let [gen-int (|> r.int (:: @ map (|>> int/abs (i/% 1_000_000))))]]
($_ r.seq
(:: @ wrap [])
r.bool
gen-int
r.frac
(r.text size)
(r.maybe gen-int)
(r.list size gen-int)
($_ r.alt r.bool gen-int r.frac)
($_ r.seq gen-int r.frac (r.text size))
gen-recursive)))
(derived: (&.Eq<?> Record))
## [Tests]
(context: "Eq polytypism"
(<| (times +100)
(do @
[sample gen-record
#let [(^open "&/") Eq<Record>]]
(test "Every instance equals itself."
(&/= sample sample)))))
|
