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(.module:
[lux #*
["_" test (#+ Test)]
[abstract/monad (#+ do)]
data/text/format
[math
["r" random]]
[control
["." io]]]
{1
["." /]})
(def: #export test
Test
(<| (_.context (%name (name-of /.Atom)))
(do r.monad
[value r.nat
swap-value r.nat
set-value r.nat
#let [box (/.atom value)]]
($_ _.and
(_.test "Can obtain the value of an atom."
(n/= value (io.run (/.read box))))
(_.test "Can swap the value of an atom."
(and (io.run (/.compare-and-swap value swap-value box))
(n/= swap-value (io.run (/.read box)))))
(_.test "Can update the value of an atom."
(exec (io.run (/.update inc box))
(n/= (inc swap-value) (io.run (/.read box)))))
(_.test "Can immediately set the value of an atom."
(exec (io.run (/.write set-value box))
(n/= set-value (io.run (/.read box)))))
))))
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