stdlib/source/test/aedifex/hash.lux


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(.using
 [library
  [lux "*"
   ["_" test {"+" Test}]
   [abstract
    [monad {"+" do}]
    [\\specification
     ["$[0]" equivalence]
     ["$[0]" codec]]]
   [control
    ["[0]" try]
    ["[0]" exception]]
   [data
    ["[0]" binary {"+" Binary}]
    [text
     ["%" format {"+" format}]]]
   [math
    ["[0]" random {"+" Random}]
    [number
     ["n" nat]]]]]
 [\\program
  ["[0]" /]]
 [test
  [lux
   [data
    ["_[0]" binary]]]])

(def: .public (random hash)
  (All (_ h)
    (-> (-> Binary (/.Hash h))
        (Random (/.Hash h))))
  (do [! random.monad]
    [size (# ! each (n.% 100) random.nat)]
    (# ! each hash (_binary.random size))))

(def: .public test
  Test
  (<| (_.covering /._)
      (_.for [/.Hash /.SHA-1 /.MD5])
      (`` (all _.and
               (_.for [/.equivalence]
                      (all _.and
                           ($equivalence.spec /.equivalence (..random /.sha-1))
                           ($equivalence.spec /.equivalence (..random /.md5))
                           ))
               (_.for [/.data]
                      (all _.and
                           (~~ (template [<hash> <constructor> <exception>]
                                 [(do random.monad
                                    [expected (..random <hash>)]
                                    (_.cover [<hash> <constructor> <exception>]
                                             (and (case (<constructor> (/.data expected))
                                                    {try.#Success actual}
                                                    (# /.equivalence = expected actual)

                                                    {try.#Failure error}
                                                    false)
                                                  (case (<constructor> (# binary.monoid composite
                                                                          (/.data expected)
                                                                          (/.data expected)))
                                                    {try.#Success actual}
                                                    false

                                                    {try.#Failure error}
                                                    (exception.match? <exception> error)))))]

                                 [/.sha-1 /.as_sha-1 /.not_a_sha-1]
                                 [/.md5 /.as_md5 /.not_a_md5]
                                 ))))
               (~~ (template [<codec> <hash>]
                     [(_.for [<codec>]
                             ($codec.spec /.equivalence <codec> (..random <hash>)))]
                     
                     [/.sha-1_codec /.sha-1]
                     [/.md5_codec /.md5]
                     ))
               (_.for [/.not_a_hash]
                      (all _.and
                           (~~ (template [<codec> <hash>]
                                 [(do random.monad
                                    [expected (..random <hash>)]
                                    (_.cover [<codec>]
                                             (case (# <codec> decoded
                                                      (format (# <codec> encoded expected)
                                                              "AABBCC"))
                                               {try.#Success actual}
                                               false

                                               {try.#Failure error}
                                               (exception.match? /.not_a_hash error))))]

                                 [/.sha-1_codec /.sha-1]
                                 [/.md5_codec /.md5]
                                 ))))
               ))))