(.module:
  [library
   [lux #*
    ["_" test (#+ Test)]
    [abstract
     [monad (#+ do)]]
    [control
     ["." try (#+ Try)]
     [concurrency
      ["." async (#+ Async)]]]
    [data
     ["." binary
      ["_#" \\test]]]
    [math
     ["." random]]]]
  [\\program
   ["." /
    ["#." remote]
    ["/#" // #_
     ["#." artifact (#+ Artifact)
      ["#/." extension]]]]]
  [\\test
   ["_." // #_
    ["#." artifact]]])

(def: .public (spec valid_artifact invalid_artifact subject)
  (-> Artifact Artifact (/.Repository Async) Test)
  (do random.monad
    [expected (_binary.random 100)]
    (in ($_ _.and'
            (do async.monad
              [.let [good_uri (/remote.uri (value@ #//artifact.version valid_artifact) valid_artifact //artifact/extension.lux_library)]
               good_upload! (\ subject upload good_uri expected)
               good_download! (\ subject download good_uri)

               .let [bad_uri (/remote.uri (value@ #//artifact.version invalid_artifact) invalid_artifact //artifact/extension.lux_library)]
               bad_upload! (\ subject upload bad_uri expected)
               bad_download! (\ subject download bad_uri)]
              (_.cover' [/.Repository]
                        (let [successfull_flow!
                              (case [good_upload! good_download!]
                                [(#try.Success _) (#try.Success actual)]
                                (\ binary.equivalence = expected actual)

                                _
                                false)

                              failed_flow!
                              (case [bad_upload! bad_download!]
                                [(#try.Failure _) (#try.Failure _)]
                                true

                                _
                                false)]
                          (and successfull_flow!
                               failed_flow!))))
            ))))