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(.module:
[library
[lux "*"
["_" test {"+" [Test]}]
[abstract
[monad {"+" [do]}]]
[control
[io {"+" [IO]}]
["[0]" try]
[concurrency
["[0]" async {"+" [Async]}]]]
[data
["[0]" text
["%" format {"+" [format]}]]]
[math
["[0]" random]]]]
[\\library
["[0]" /]])
(def: .public (spec console)
(-> (IO (/.Console Async)) Test)
(do random.monad
[message (random.ascii/alpha 10)]
(in (do async.monad
[console (async.future console)
?write (\ console write (format message text.new_line))
?read (\ console read [])
?read_line (\ console read_line [])
?close/good (\ console close [])
?close/bad (\ console close [])
.let [can_write!
(case ?write
(#try.Success _)
true
_
false)
can_read!
(case [?read ?read_line]
[(#try.Success _) (#try.Success _)]
true
_
false)
can_close!
(case [?close/good ?close/bad]
[(#try.Success _) (#try.Failure _)]
true
_
false)]]
(_.cover' [/.Console]
(and can_write!
can_read!
can_close!))))))
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