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(.using
 [library
  [lux "*"
   ["_" test {"+" Test}]
   [abstract
    [monad {"+" do}]]
   [control
    ["[0]" try ("[1]#[0]" functor)]
    [concurrency
     ["[0]" async]]]
   [data
    ["[0]" binary ("[1]#[0]" equivalence)]
    [collection
     ["[0]" sequence]]]
   [math
    ["[0]" random]
    [number
     ["n" nat]]]
   [world
    ["[0]" file]]]]
 [\\library
  ["[0]" /
   ["/[1]" //
    ["/[1]" //
     ["[0]" archive
      ["[0]" signature]
      ["[0]" key]
      ["[0]" registry]
      ["[0]" module
       ["[0]" document]]]]]]]
 ["$" // "_"
  [//
   ["[1][0]" context]
   ["[1][0]" archive
    ["[2][0]" signature]]]])

(def: .public test
  Test
  (<| (_.covering /._)
      (do [! random.monad]
        [.let [/ "/"
               fs (file.mock /)]
         context $context.random
         module/0 (random.lower_case 1)
         module/1 (random.lower_case 2)
         content/0 random.nat
         content/1 (random.only (|>> (n.= content/0) not) random.nat)
         hash random.nat
         signature $signature.random
         .let [key (key.key signature content/0)
               [archive expected] (|> (do try.monad
                                        [[@module/0 archive] (archive.reserve module/0 archive.empty)
                                         [@module/1 archive] (archive.reserve module/1 archive)
                                         .let [entry/0 [archive.#module [module.#id @module/0
                                                                         module.#descriptor ($archive.descriptor module/0 hash)
                                                                         module.#document (document.document key content/0)]
                                                        archive.#output sequence.empty
                                                        archive.#registry registry.empty]
                                               entry/1 [archive.#module [module.#id @module/1
                                                                         module.#descriptor ($archive.descriptor module/1 hash)
                                                                         module.#document (document.document key content/1)]
                                                        archive.#output sequence.empty
                                                        archive.#registry registry.empty]]
                                         archive (archive.has module/0 entry/0 archive)
                                         archive (archive.has module/1 entry/1 archive)]
                                        (in [archive (archive.export ///.version archive)]))
                                      try.trusted)]]
        (all _.and
             (in (do [! async.monad]
                   [pre/0 (# fs file? (/.descriptor fs context))
                    enabled? (//.enable! ! fs context)
                    cached? (/.cache! fs context archive)
                    actual (# fs read (/.descriptor fs context))
                    post/0 (# fs file? (/.descriptor fs context))]
                   (_.coverage' [/.descriptor /.cache!]
                     (and (not pre/0)
                          (|> (do try.monad
                                [_ enabled?
                                 _ cached?]
                                actual)
                              (try#each (binary#= expected))
                              (try.else false))
                          post/0))))
             ))))