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|
(.using
[library
[lux (.except)
["_" test (.only Test)]
[abstract
[equivalence (.only Equivalence)]
[monad (.only do)]
[\\specification
["$[0]" monoid]]]
[math
["[0]" random (.only Random)]
[number
["n" nat]]]]]
[\\library
["[0]" /]]
["[0]" /
["[1][0]" contract]
["[1][0]" memo]
["[1][0]" mixin]
["[1][0]" mutual]
["[1][0]" inline]])
(def: .public test
Test
(do [! random.monad]
[expected random.nat
f0 (# ! each n.+ random.nat)
f1 (# ! each n.* random.nat)
dummy random.nat
extra (|> random.nat (random.only (|>> (n.= expected) not)))]
(<| (_.covering /._)
(all _.and
(let [equivalence (is (Equivalence (-> Nat Nat))
(implementation
(def: (= left right)
(n.= (left extra)
(right extra)))))
generator (is (Random (-> Nat Nat))
(# ! each n.- random.nat))]
(_.for [/.monoid]
($monoid.spec equivalence /.monoid generator)))
(_.coverage [/.identity]
(n.= expected
(/.identity expected)))
(_.coverage [/.composite]
(n.= (f0 (f1 expected))
((/.composite f0 f1) expected)))
(_.coverage [/.constant]
(n.= expected
((/.constant expected) dummy)))
(_.coverage [/.flipped]
(let [outcome ((/.flipped n.-) expected extra)]
(and (n.= (n.- extra expected)
outcome)
(not (n.= (n.- expected extra)
outcome)))))
(_.coverage [/.on]
(n.= (f0 extra)
(/.on extra f0)))
/contract.test
/memo.test
/mixin.test
/mutual.test
/inline.test
))))
|
