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|
(.using
[library
[lux "*"
["_" test {"+" Test}]
[abstract
[monad {"+" do}]
[\\specification
["$[0]" functor {"+" Injection Comparison}]
["$[0]" apply]
["$[0]" monad]
["$[0]" equivalence]]]
[control
["[0]" pipe]
["[0]" io]]
[data
["[0]" text ("[1]#[0]" equivalence)]]
[math
["[0]" random {"+" Random}]
[number
["n" nat]]]]]
[\\library
["[0]" / {"+" Try}]])
(def: injection
(Injection Try)
(|>> {/.#Success}))
(def: comparison
(Comparison Try)
(function (_ ==)
(# (/.equivalence ==) =)))
(def: .public (attempt element)
(All (_ a) (-> (Random a) (Random (Try a))))
($_ random.or
(random.unicode 1)
element))
(def: .public test
Test
(<| (_.covering /._)
(_.for [/.Try])
(do random.monad
[expected random.nat
alternative (|> random.nat (random.only (|>> (n.= expected) not)))
error (random.unicode 1)
.let [(open "io#[0]") io.monad]])
($_ _.and
(_.for [/.equivalence]
($equivalence.spec (/.equivalence n.equivalence) (..attempt random.nat)))
(_.for [/.functor]
($functor.spec ..injection ..comparison /.functor))
(_.for [/.apply]
($apply.spec ..injection ..comparison /.apply))
(_.for [/.monad]
($monad.spec ..injection ..comparison /.monad))
(_.cover [/.trusted]
(n.= expected
(/.trusted {/.#Success expected})))
(_.cover [/.of_maybe]
(case [(/.of_maybe {.#Some expected})
(/.of_maybe {.#None})]
[{/.#Success actual} {/.#Failure _}]
(n.= expected actual)
_
false))
(_.cover [/.maybe]
(case [(/.maybe {/.#Success expected})
(/.maybe (is (/.Try Nat) {/.#Failure error}))]
[{.#Some actual} {.#None}]
(n.= expected actual)
_
false))
(_.cover [/.else]
(and (n.= expected
(/.else alternative {/.#Success expected}))
(n.= alternative
(/.else alternative (is (Try Nat) {/.#Failure error})))))
(_.cover [/.with /.lifted]
(let [lifted (/.lifted io.monad)]
(|> (do (/.with io.monad)
[a (lifted (io#in expected))
b (in alternative)]
(in (n.+ a b)))
io.run!
(pipe.case
{/.#Success result}
(n.= (n.+ expected alternative)
result)
_
false))))
)))
|
