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|
(.module:
[lux #*
["_" test (#+ Test)]
[abstract
[predicate (#+ Predicate)]
[monad (#+ do)]]
[control
["." try (#+ Try)]
["." exception]
[concurrency
["." promise (#+ Promise)]]]
[data
["." binary (#+ Binary) ("#\." equivalence)]
["." text ("#\." equivalence)
["%" format (#+ format)]]
[collection
["." list]]]
[math
["." random (#+ Random) ("#\." monad)]]]
[\\
["." /
["/#" //]]]
[////
[data
["$." binary]]])
(def: concern
(Random [/.Concern (Predicate /.Concern)])
($_ random.either
(random\wrap [/.creation /.creation?])
(random\wrap [/.modification /.modification?])
(random\wrap [/.deletion /.deletion?])
))
(def: concern\\test
Test
(<| (_.for [/.Concern])
($_ _.and
(_.cover [/.creation /.creation?]
(and (/.creation? /.creation)
(not (/.creation? /.modification))
(not (/.creation? /.deletion))))
(_.cover [/.modification /.modification?]
(and (not (/.modification? /.creation))
(/.modification? /.modification)
(not (/.modification? /.deletion))))
(_.cover [/.deletion /.deletion?]
(and (not (/.deletion? /.creation))
(not (/.deletion? /.modification))
(/.deletion? /.deletion)))
(do random.monad
[left ..concern
right (random.filter (|>> (is? left) not)
..concern)
#let [[left left?] left
[right right?] right]]
(_.cover [/.also]
(let [composition (/.also left right)]
(and (left? composition)
(right? composition)))))
(_.cover [/.all]
(and (/.creation? /.all)
(/.modification? /.all)
(/.deletion? /.all)))
)))
(def: exception
Test
(do {! random.monad}
[directory (random.ascii/alpha 5)
#let [[fs watcher] (/.mock "/")]]
($_ _.and
(wrap (do promise.monad
[?concern (\ watcher concern directory)
?stop (\ watcher stop directory)]
(_.cover' [/.not_being_watched]
(and (case ?concern
(#try.Failure error)
(exception.match? /.not_being_watched error)
(#try.Success _)
false)
(case ?stop
(#try.Failure error)
(exception.match? /.not_being_watched error)
(#try.Success _)
false)))))
)))
(def: (no_events_prior_to_creation! fs watcher directory)
(-> (//.System Promise) (/.Watcher Promise) //.Path (Promise (Try Bit)))
(do {! (try.with promise.monad)}
[_ (\ fs make_directory directory)
_ (\ watcher start /.all directory)]
(|> (\ watcher poll [])
(\ ! map list.empty?))))
(def: (after_creation! fs watcher expected_path)
(-> (//.System Promise) (/.Watcher Promise) //.Path (Promise (Try Bit)))
(do (try.with promise.monad)
[_ (: (Promise (Try Any))
(//.make_file promise.monad fs (binary.create 0) expected_path))
poll/pre (\ watcher poll [])
poll/post (\ watcher poll [])]
(wrap (and (case poll/pre
(^ (list [concern actual_path]))
(and (text\= expected_path actual_path)
(and (/.creation? concern)
(not (/.modification? concern))
(not (/.deletion? concern))))
_
false)
(list.empty? poll/post)))))
(def: (after_modification! fs watcher data expected_path)
(-> (//.System Promise) (/.Watcher Promise) Binary //.Path (Promise (Try Bit)))
(do (try.with promise.monad)
[_ (promise.delay 1 (#try.Success "Delay to make sure the over_write time-stamp always changes."))
_ (\ fs write data expected_path)
poll/2 (\ watcher poll [])
poll/2' (\ watcher poll [])]
(wrap (and (case poll/2
(^ (list [concern actual_path]))
(and (text\= expected_path actual_path)
(and (not (/.creation? concern))
(/.modification? concern)
(not (/.deletion? concern))))
_
false)
(list.empty? poll/2')))))
(def: (after_deletion! fs watcher expected_path)
(-> (//.System Promise) (/.Watcher Promise) //.Path (Promise (Try Bit)))
(do (try.with promise.monad)
[_ (\ fs delete expected_path)
poll/3 (\ watcher poll [])
poll/3' (\ watcher poll [])]
(wrap (and (case poll/3
(^ (list [concern actual_path]))
(and (not (/.creation? concern))
(not (/.modification? concern))
(/.deletion? concern))
_
false)
(list.empty? poll/3')))))
(def: #export test
Test
(<| (_.covering /._)
(_.for [/.Watcher])
($_ _.and
..concern\\test
..exception
(do {! random.monad}
[directory (random.ascii/alpha 5)
#let [/ "/"
[fs watcher] (/.mock /)]
expected_path (\ ! map (|>> (format directory /))
(random.ascii/alpha 5))
data ($binary.random 10)]
(wrap (do {! promise.monad}
[verdict (do (try.with !)
[no_events_prior_to_creation!
(..no_events_prior_to_creation! fs watcher directory)
after_creation!
(..after_creation! fs watcher expected_path)
after_modification!
(..after_modification! fs watcher data expected_path)
after_deletion!
(..after_deletion! fs watcher expected_path)]
(wrap (and no_events_prior_to_creation!
after_creation!
after_modification!
after_deletion!)))]
(_.cover' [/.mock /.polling]
(try.default false verdict)))))
)))
|
