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(.module:
[lux #*
["." io (#+ IO)]
[control
[monad (#+ do)]]
[concurrency
["." promise]]
[data
["." error (#+ Error)]
["." number]
["." text
format]
[collection
["." list]]]
[time
["." instant]
["." duration]]
[world
["@" file (#+ Path File)]
["." binary (#+ Binary)]]
[math
["r" random ("#/." monad)]]]
lux/test
[//
["_." binary]])
(def: truncate-millis
(|>> (i// +1_000) (i/* +1_000)))
(def: (creation-and-deletion number)
(-> Nat Test)
(r/wrap (do promise.monad
[#let [path (format "temp_file_" (%n number))]
result (promise.future
(do (error.ErrorT io.monad)
[#let [check-existence! (: (IO (Error Bit))
(io.from-io (@.exists? io.monad @.system path)))]
pre! check-existence!
file (:: @.system create-file path)
post! check-existence!
_ (:: file delete [])
remains? check-existence!]
(wrap (and (not pre!)
post!
(not remains?)))))]
(assert "Can create/delete files."
(error.default #0 result)))))
(def: (read-and-write number data)
(-> Nat Binary Test)
(r/wrap (do promise.monad
[#let [path (format "temp_file_" (%n number))]
result (promise.future
(do (error.ErrorT io.monad)
[file (:: @.system create-file path)
_ (:: file over-write data)
content (:: file content [])
_ (:: file delete [])]
(wrap (:: binary.equivalence = data content))))]
(assert "Can write/read files."
(error.default #0 result)))))
(context: "File system."
(do @
[file-size (|> r.nat (:: @ map (|>> (n/% 100) (n/max 10))))
dataL (_binary.binary file-size)
dataR (_binary.binary file-size)
new-modified (|> r.int (:: @ map (|>> (:: number.number abs)
truncate-millis
duration.from-millis
instant.absolute)))]
($_ seq
(creation-and-deletion 0)
(read-and-write 1 dataL)
(wrap (do promise.monad
[#let [path "temp_file_2"]
result (promise.future
(do (error.ErrorT io.monad)
[file (:: @.system create-file path)
_ (:: file over-write dataL)
read-size (:: file size [])
_ (:: file delete [])]
(wrap (n/= file-size read-size))))]
(assert "Can read file size."
(error.default #0 result))))
(wrap (do promise.monad
[#let [path "temp_file_3"]
result (promise.future
(do (error.ErrorT io.monad)
[file (:: @.system create-file path)
_ (:: file over-write dataL)
_ (:: file append dataR)
content (:: file content [])
read-size (:: file size [])
_ (:: file delete [])]
(wrap (and (n/= (n/* 2 file-size) read-size)
(:: binary.equivalence =
dataL
(error.assume (binary.slice 0 (dec file-size) content)))
(:: binary.equivalence =
dataR
(error.assume (binary.slice file-size (dec read-size) content)))))))]
(assert "Can append to files."
(error.default #0 result))))
(wrap (do promise.monad
[#let [path "temp_dir_4"]
result (promise.future
(do (error.ErrorT io.monad)
[#let [check-existence! (: (IO (Error Bit))
(io.from-io (@.exists? io.monad @.system path)))]
pre! check-existence!
dir (:: @.system create-directory path)
post! check-existence!
_ (:: dir discard [])
remains? check-existence!]
(wrap (and (not pre!)
post!
(not remains?)))))]
(assert "Can create/delete directories."
(error.default #0 result))))
(wrap (do promise.monad
[#let [file-path "temp_file_5"
dir-path "temp_dir_5"]
result (promise.future
(do (error.ErrorT io.monad)
[dir (:: @.system create-directory dir-path)
file (:: @.system create-file (format dir-path "/" file-path))
_ (:: file over-write dataL)
read-size (:: file size [])
_ (:: file delete [])
_ (:: dir discard [])]
(wrap (n/= file-size read-size))))]
(assert "Can create files inside of directories."
(error.default #0 result))))
(wrap (do promise.monad
[#let [file-path "temp_file_6"
dir-path "temp_dir_6"
inner-dir-path "inner_temp_dir_6"]
result (promise.future
(do (error.ErrorT io.monad)
[dir (:: @.system create-directory dir-path)
pre-files (:: dir files [])
pre-directories (:: dir directories [])
file (:: @.system create-file (format dir-path "/" file-path))
inner-dir (:: @.system create-directory (format dir-path "/" inner-dir-path))
post-files (:: dir files [])
post-directories (:: dir directories [])
_ (:: file delete [])
_ (:: inner-dir discard [])
_ (:: dir discard [])]
(wrap (and (and (n/= 0 (list.size pre-files))
(n/= 0 (list.size pre-directories)))
(and (n/= 1 (list.size post-files))
(n/= 1 (list.size post-directories)))))))]
(assert "Can list files/directories inside a directory."
(error.default #0 result))))
(wrap (do promise.monad
[#let [path "temp_file_7"]
result (promise.future
(do (error.ErrorT io.monad)
[file (:: @.system create-file path)
_ (:: file over-write dataL)
_ (:: file modify new-modified)
old-modified (:: file last-modified [])
_ (:: file delete [])]
(wrap (:: instant.equivalence = new-modified old-modified))))]
(assert "Can change the time of last modification."
(error.default #0 result))))
(wrap (do promise.monad
[#let [path0 (format "temp_file_8+0")
path1 (format "temp_file_8+1")]
result (promise.future
(do (error.ErrorT io.monad)
[#let [check-existence! (: (-> Path (IO (Error Bit)))
(|>> (@.exists? io.monad @.system) io.from-io))]
file0 (:: @.system create-file path0)
_ (:: file0 over-write dataL)
pre! (check-existence! path0)
file1 (: (IO (Error (File IO))) ## TODO: Remove :
(:: file0 move path1))
post! (check-existence! path0)
confirmed? (check-existence! path1)
_ (:: file1 delete [])]
(wrap (and pre!
(not post!)
confirmed?))))]
(assert "Can move a file from one path to another."
(error.default #0 result))))
)))
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