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|
(.using
[library
[lux "*"
[ffi {"+"}]
["_" test {"+" Test}]
[abstract
["[0]" monad {"+" do}]
["[0]" enum]
[\\specification
["$[0]" equivalence]
["$[0]" monoid]]]
[control
["[0]" try {"+" Try}]
["[0]" exception {"+" Exception}]]
[data
[collection
["[0]" list ("[1]#[0]" functor)]
[array
[\\unsafe {"+"}]]]]
[math
["[0]" random {"+" Random}]
[number
["n" nat]
["[0]" i64]]]]]
[\\library
["[0]" /
["!" \\unsafe]]])
(def: (succeed result)
(-> (Try Bit) Bit)
(case result
{try.#Failure _}
false
{try.#Success output}
output))
(def: .public (random size)
(-> Nat (Random /.Binary))
(let [output (/.empty size)]
(loop (again [idx 0])
(if (n.< size idx)
(do random.monad
[byte random.nat]
(exec (try.trusted (/.has/1! idx byte output))
(again (++ idx))))
(# random.monad in output)))))
(def: (throws? exception try)
(All (_ e a) (-> (Exception e) (Try a) Bit))
(case try
{try.#Failure error}
(exception.match? exception error)
{try.#Success _}
false))
(def: (binary_io power read write value)
(-> Nat (-> Nat /.Binary (Try Nat)) (-> Nat Nat /.Binary (Try Any)) Nat Bit)
(let [bytes (i64.left_shifted power 1)
binary (/.empty bytes)
cap (case bytes
8 (-- 0)
_ (|> 1 (i64.left_shifted (n.* 8 bytes)) --))
capped_value (i64.and cap value)]
(and (..succeed
(do try.monad
[pre (read 0 binary)
_ (write 0 value binary)
post (read 0 binary)]
(in (and (n.= 0 pre)
(n.= capped_value post)))))
(throws? /.index_out_of_bounds (read 1 binary))
(throws? /.index_out_of_bounds (write 1 value binary)))))
(def: as_list
(-> /.Binary (List Nat))
(/.aggregate (function (_ head tail)
{.#Item head tail})
(list)))
(def: test|unsafe
Test
(<| (_.covering !._)
(_.for [!.Binary])
(do [! random.monad]
[.let [gen_size (|> random.nat (# ! each (|>> (n.% 100) (n.max 8))))]
size gen_size
sample (..random size)
value random.nat
.let [gen_idx (|> random.nat (# ! each (n.% size)))]
offset gen_idx
length (# ! each (n.% (n.- offset size)) random.nat)]
(`` ($_ _.and
(_.for [!.=]
($equivalence.spec (function (_ left right)
(!.= left right))
(..random size)))
(_.cover [!.empty]
(!.= (!.empty size) (!.empty size)))
(_.cover [!.size]
(|> (!.empty size) !.size (n.= size)))
(~~ (template [<power> <bytes/?> <has/?>]
[(_.cover [<bytes/?> <has/?>]
(let [bytes (i64.left_shifted <power> 1)
binary (!.empty bytes)
cap (case bytes
8 (-- 0)
_ (|> 1 (i64.left_shifted (n.* 8 bytes)) --))
capped_value (i64.and cap value)
pre (<bytes/?> 0 binary)
_ (<has/?> 0 value binary)
post (<bytes/?> 0 binary)]
(and (n.= 0 pre)
(n.= capped_value post))))]
[0 !.bytes/1 !.has/1!]
[1 !.bytes/2 !.has/2!]
[2 !.bytes/4 !.has/4!]
[3 !.bytes/8 !.has/8!]))
(_.cover [!.slice]
(let [random_slice (!.slice offset length sample)
idxs (is (List Nat)
(case length
0 (list)
_ (enum.range n.enum 0 (-- length))))
reader (function (_ binary idx)
(!.bytes/1 idx binary))]
(and (n.= length (!.size random_slice))
(# (list.equivalence n.equivalence) =
(list#each (|>> (n.+ offset) (reader sample)) idxs)
(list#each (reader random_slice) idxs)))))
(_.cover [!.copy!]
(and (let [it (!.copy! size 0 sample 0 (!.empty size))]
(and (not (same? sample it))
(!.= sample it)))
(let [sample/0 (!.bytes/1 0 sample)
copy (!.copy! 1 0 sample 0 (!.empty 2))
copy/0 (!.bytes/1 0 copy)
copy/1 (!.bytes/1 1 copy)]
(and (n.= sample/0 copy/0)
(n.= 0 copy/1)))))
)))))
(def: .public test
Test
(<| (_.covering /._)
(_.for [/.Binary])
(do [! random.monad]
[.let [gen_size (|> random.nat (# ! each (|>> (n.% 100) (n.max 8))))]
size gen_size
sample (..random size)
value random.nat
.let [gen_idx (|> random.nat (# ! each (n.% size)))]
offset (# ! each (n.max 1) gen_idx)
length (# ! each (n.% (n.- offset size)) random.nat)]
($_ _.and
(_.for [/.equivalence]
($equivalence.spec /.equivalence (..random size)))
(_.for [/.monoid]
($monoid.spec /.equivalence /.monoid (..random size)))
(_.cover [/.aggregate]
(n.= (# list.mix mix n.+ 0 (..as_list sample))
(/.aggregate n.+ 0 sample)))
(_.cover [/.empty]
(# /.equivalence =
(/.empty size)
(/.empty size)))
(_.cover [/.size]
(|> (/.empty size) /.size (n.= size)))
(_.for [/.index_out_of_bounds]
($_ _.and
(_.cover [/.bytes/1 /.has/1!]
(..binary_io 0 /.bytes/1 /.has/1! value))
(_.cover [/.bytes/2 /.has/2!]
(..binary_io 1 /.bytes/2 /.has/2! value))
(_.cover [/.bytes/4 /.has/4!]
(..binary_io 2 /.bytes/4 /.has/4! value))
(_.cover [/.bytes/8 /.has/8!]
(..binary_io 3 /.bytes/8 /.has/8! value))))
(_.cover [/.slice]
(let [random_slice (try.trusted (/.slice offset length sample))
idxs (is (List Nat)
(case length
0 (list)
_ (enum.range n.enum 0 (-- length))))
reader (function (_ binary idx)
(/.bytes/1 idx binary))]
(and (n.= length (/.size random_slice))
(case [(monad.each try.monad (|>> (n.+ offset) (reader sample)) idxs)
(monad.each try.monad (reader random_slice) idxs)]
[{try.#Success binary_vals} {try.#Success slice_vals}]
(# (list.equivalence n.equivalence) = binary_vals slice_vals)
_
#0))))
(_.cover [/.slice_out_of_bounds]
(and (throws? /.slice_out_of_bounds (/.slice size size sample))
(let [verdict (throws? /.slice_out_of_bounds (/.slice offset size sample))]
(case offset
0 (not verdict)
_ verdict))))
(_.cover [/.after]
(and (# /.equivalence = sample (/.after 0 sample))
(# /.equivalence = (/.empty 0) (/.after size sample))
(n.= (n.- offset size) (/.size (/.after offset sample)))
(case (list.reversed (..as_list sample))
{.#End}
false
{.#Item head tail}
(n.= (list.mix n.+ 0 tail)
(/.aggregate n.+ 0 (/.after 1 sample))))))
(_.cover [/.copy!]
(and (case (/.copy! size 0 sample 0 (/.empty size))
{try.#Success output}
(and (not (same? sample output))
(# /.equivalence = sample output))
{try.#Failure _}
false)
(succeed
(do try.monad
[sample/0 (/.bytes/1 0 sample)
copy (/.copy! 1 0 sample 0 (/.empty 2))
copy/0 (/.bytes/1 0 copy)
copy/1 (/.bytes/1 1 copy)]
(in (and (n.= sample/0 copy/0)
(n.= 0 copy/1)))))))
(_.cover [/.cannot_copy]
(and (not (throws? /.cannot_copy
(/.copy! size 0 sample 0 (/.empty size))))
(throws? /.cannot_copy
(/.copy! (n.+ offset size) 0 sample 0 (/.empty size)))
(throws? /.cannot_copy
(/.copy! size offset sample 0 (/.empty size)))
(throws? /.cannot_copy
(/.copy! size 0 sample offset (/.empty size)))))
..test|unsafe
))))
|
