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|
(.module:
[lux #*
[control
["M" monad (#+ do Monad)]
pipe]
[data
["." maybe]
[text
format]
[collection
["." list]]]
[math
["r" random]]
["&" type]]
lux/test)
## [Utils]
(def: #export gen-short
(r.Random Text)
(do r.monad
[size (|> r.nat (:: @ map (n/% 10)))]
(r.unicode size)))
(def: #export gen-name
(r.Random Name)
(r.and gen-short gen-short))
(def: #export gen-type
(r.Random Type)
(let [(^open "R/.") r.monad]
(r.rec (function (_ gen-type)
(let [pairG (r.and gen-type gen-type)
idG r.nat
quantifiedG (r.and (R/wrap (list)) gen-type)]
($_ r.or
(r.and gen-short (R/wrap (list)))
pairG
pairG
pairG
idG
idG
idG
quantifiedG
quantifiedG
pairG
(r.and gen-name gen-type)
))))))
## [Tests]
(context: "Types"
(<| (times 100)
(do @
[sample gen-type]
(test "Every type is equal to itself."
(:: &.equivalence = sample sample)))))
(context: "Type application"
(test "Can apply quantified types (universal and existential quantification)."
(and (maybe.default #0
(do maybe.monad
[partial (&.apply (list Bit) Ann)
full (&.apply (list Int) partial)]
(wrap (:: &.equivalence = full (#.Product Bit Int)))))
(|> (&.apply (list Bit) Text)
(case> #.None #1 _ #0)))))
(context: "Naming"
(let [base (#.Named ["" "a"] (#.Product Bit Int))
aliased (#.Named ["" "c"]
(#.Named ["" "b"]
base))]
($_ seq
(test "Can remove aliases from an already-named type."
(:: &.equivalence =
base
(&.un-alias aliased)))
(test "Can remove all names from a type."
(and (not (:: &.equivalence =
base
(&.un-name aliased)))
(:: &.equivalence =
(&.un-name base)
(&.un-name aliased)))))))
(context: "Type construction [structs]"
(<| (times 100)
(do @
[size (|> r.nat (:: @ map (n/% 3)))
members (|> gen-type
(r.filter (function (_ type)
(case type
(^or (#.Sum _) (#.Product _))
#0
_
#1)))
(list.repeat size)
(M.seq @))
#let [(^open "&/.") &.equivalence
(^open "L/.") (list.equivalence &.equivalence)]]
(with-expansions
[<struct-tests> (do-template [<desc> <ctor> <dtor> <unit>]
[(test (format "Can build and tear-down " <desc> " types.")
(let [flat (|> members <ctor> <dtor>)]
(or (L/= members flat)
(and (L/= (list) members)
(L/= (list <unit>) flat)))))]
["variant" &.variant &.flatten-variant Nothing]
["tuple" &.tuple &.flatten-tuple Any]
)]
($_ seq
<struct-tests>
)))))
(context: "Type construction [parameterized]"
(<| (times 100)
(do @
[size (|> r.nat (:: @ map (n/% 3)))
members (M.seq @ (list.repeat size gen-type))
extra (|> gen-type
(r.filter (function (_ type)
(case type
(^or (#.Function _) (#.Apply _))
#0
_
#1))))
#let [(^open "&/.") &.equivalence
(^open "L/.") (list.equivalence &.equivalence)]]
($_ seq
(test "Can build and tear-down function types."
(let [[inputs output] (|> (&.function members extra) &.flatten-function)]
(and (L/= members inputs)
(&/= extra output))))
(test "Can build and tear-down application types."
(let [[tfunc tparams] (|> extra (&.application members) &.flatten-application)]
(n/= (list.size members) (list.size tparams))))
))))
(context: "Type construction [higher order]"
(<| (times 100)
(do @
[size (|> r.nat (:: @ map (n/% 3)))
extra (|> gen-type
(r.filter (function (_ type)
(case type
(^or (#.UnivQ _) (#.ExQ _))
#0
_
#1))))
#let [(^open "&/.") &.equivalence]]
(with-expansions
[<quant-tests> (do-template [<desc> <ctor> <dtor>]
[(test (format "Can build and tear-down " <desc> " types.")
(let [[flat-size flat-body] (|> extra (<ctor> size) <dtor>)]
(and (n/= size flat-size)
(&/= extra flat-body))))]
["universally-quantified" &.univ-q &.flatten-univ-q]
["existentially-quantified" &.ex-q &.flatten-ex-q]
)]
($_ seq
<quant-tests>
)))))
|
