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(.using
  [library
   [lux "*"
    ["_" test {"+" Test}]
    [abstract
     [monad {"+" do}]
     [\\specification
      ["$[0]" equivalence]]]
    [data
     ["[0]" binary "_"
      ["[1]T" \\test]]]
    [math
     ["[0]" random {"+" Random} ("[1]#[0]" monad)]]]]
  ["$[0]" /// "_"
   ["[1][0]" hash]]
  [\\program
   ["[0]" /
    ["//[1]" /// "_"
     ["[1][0]" hash]]]])

(def: .public random
  (Random /.Status)
  ($_ random.or
      (random#in [])
      (random.or ($///hash.random ///hash.sha-1)
                 ($///hash.random ///hash.md5))
      (random.and ($///hash.random ///hash.sha-1)
                  ($///hash.random ///hash.md5))
      ))

(def: .public test
  Test
  (<| (_.covering /._)
      (_.for [/.Status]
             ($_ _.and
                 (_.for [/.equivalence]
                        ($equivalence.spec /.equivalence ..random))

                 (do random.monad
                   [payload (binaryT.random 1)]
                   (_.cover [/.verified]
                            (case (/.verified payload)
                              {/.#Verified sha1 md5}
                              true

                              _
                              false)))
                 ))))