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|
(.module:
[lux #*
["_" test (#+ Test)]
[abstract
[monad (#+ do)]]
[data
["." text ("#\." equivalence)
["%" format (#+ format)]]]
[math
["." random (#+ Random)]
[number
["n" nat]]]]
{1
["." /]})
(def: part
(Random Text)
(do {! random.monad}
[size (\ ! map (|>> (n.% 10) inc) random.nat)]
(random.ascii/alpha size)))
(def: #export test
Test
(<| (_.covering /._)
(_.for [/.Buffer])
(do random.monad
[left ..part
mid ..part
right ..part]
($_ _.and
(_.cover [/.empty]
(n.= 0(/.size /.empty)))
(_.cover [/.size /.append]
(n.= (text.size left)
(/.size (/.append left /.empty))))
(_.cover [/.text]
(text\= (format left mid right)
(|> /.empty
(/.append left)
(/.append mid)
(/.append right)
/.text)))
))))
|
