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(.using
[library
[lux (.full)
["_" test (.only Test)]
[abstract
[monad (.only do)]]
[data
["[0]" bit ("[1]#[0]" equivalence)]]
[math
["[0]" random (.only Random)]
[number
["n" nat]]]]]
[\\library
["[0]" /]])
(def: .public test
Test
(<| (_.covering /._)
(_.for [/.Arity])
(do [! random.monad]
[arity (# ! each (n.% 3) random.nat)]
(all _.and
(_.coverage [/.nullary?]
(bit#= (n.= 0 arity) (/.nullary? arity)))
(_.coverage [/.unary?]
(bit#= (n.= 1 arity) (/.unary? arity)))
(_.coverage [/.multiary?]
(bit#= (n.>= 2 arity) (/.multiary? arity)))
))))
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