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(.using
 [library
  [lux (.except)
   ["_" test (.only Test)]
   [abstract
    [monad (.only do)]]
   [control
    ["[0]" maybe]
    ["[0]" try]
    ["[0]" exception (.only exception:)]
    [concurrency
     ["[0]" async (.only Async)]]]
   [data
    ["[0]" text (.open: "[1]#[0]" equivalence)
     ["%" \\format (.only format)]]]
   [math
    ["[0]" random]]
   [meta
    ["lux_[0]" version]]
   [tool
    [compiler
     ["[0]" version]]]
   [world
    ["[0]" console (.only Console Mock)]]]]
 [///
  ["@[0]" profile]]
 [\\program
  ["[0]" /]])

(exception: .public console_is_closed!)

(def: mock
  (Mock [Bit Text])
  (implementation
   (def: (on_read [open? state])
     (if open?
       (try.of_maybe
        (do maybe.monad
          [head (text.char 0 state)
           [_ tail] (text.split_at 1 state)]
          (in [[open? tail] head])))
       (exception.except ..console_is_closed! [])))
   (def: (on_read_line [open? state])
     (if open?
       (try.of_maybe
        (do maybe.monad
          [[output state] (text.split_by text.new_line state)]
          (in [[open? state] output])))
       (exception.except ..console_is_closed! [])))
   (def: (on_write input [open? state])
     (if open?
       {try.#Success [open? (format state input)]}
       (exception.except ..console_is_closed! [])))
   (def: (on_close [open? buffer])
     (if open?
       {try.#Success [false buffer]}
       (exception.except ..console_is_closed! [])))))

(def: .public echo
  (-> Text (Console Async))
  (|>> [true]
       (console.mock ..mock)
       console.async))

(def: .public test
  Test
  (<| (_.covering /._)
      (do random.monad
        [profile @profile.random]
        (in (do async.monad
              [.let [console (..echo "")]
               verdict (do (try.with async.monad)
                         [_ (/.do! console profile)
                          logging (at console read_line [])]
                         (in (text#= (version.format lux_version.latest)
                                     logging)))]
              (_.coverage' [/.do!]
                (try.else false verdict)))))))