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(.module:
  [lux #*
   ["_" test (#+ Test)]
   [abstract
    [monad (#+ do)]]
   [data
    ["." bit ("#\." equivalence)]]
   [math
    ["." random (#+ Random)]
    [number
     ["n" nat]]]]
  {1
   ["." /]})

(def: #export (spec (^open "\.") random)
  (All [a] (-> (/.Hash a) (Random a) Test))
  (do random.monad
    [parameter random
     subject random]
    (_.cover [/.Hash]
             (bit\= (\= parameter subject)
                    (n.= (\hash parameter) (\hash subject))))))