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(.using
 [library
  [lux "*"
   ["_" test {"+" Test}]
   [abstract
    [monad {"+" do}]]
   [data
    ["[0]" text]
    [collection
     ["[0]" set]
     ["[0]" list ("[1]#[0]" functor)]]]
   [math
    ["[0]" random {"+" Random}]
    [number
     ["n" nat]]]]]
 [\\library
  ["[0]" /]])

(def: .public random
  (Random /.Context)
  (do [! random.monad]
    [context ($_ random.either
                 (in /.js)
                 (in /.jvm)
                 (in /.lua)
                 (in /.python)
                 (in /.ruby))]
    (# ! each context (random.ascii/lower 1))))

(def: .public test
  Test
  (<| (_.covering /._)
      (_.for [/.Context /.Extension])
      (do [! random.monad]
        [target (random.ascii/lower 1)]
        ($_ _.and
            (_.cover [/.js /.jvm /.lua /.python /.ruby]
                     (let [contexts (list (/.js target)
                                          (/.jvm target)
                                          (/.lua target)
                                          (/.python target)
                                          (/.ruby target))
                           maximum (list.size contexts)]
                       (`` (and (~~ (template [<amount> <slot>]
                                      [(|> contexts
                                           (list#each (value@ <slot>))
                                           (set.of_list text.hash)
                                           set.size
                                           (n.= <amount>))]

                                      [maximum /.#host]
                                      [maximum /.#host_module_extension]
                                      [maximum /.#artifact_extension]
                                      [1 /.#target]
                                      ))))))
            ))))