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(.using
 [library
  [lux "*"
   ["_" test {"+" Test}]
   ["[0]" meta]
   [abstract
    ["[0]" monad
     [indexed {"+" do}]]]
   [control
    ["[0]" io {"+" IO}]
    ["[0]" try]
    ["[0]" exception {"+" Exception}]
    [concurrency
     ["[0]" async {"+" Async}]]
    [parser
     ["<[0]>" code]]]
   [data
    ["[0]" identity {"+" Identity}]
    ["[0]" text ("[1]#[0]" equivalence)
     ["%" format {"+" format}]]]
   ["[0]" macro
    [syntax {"+" syntax:}]
    ["[0]" code]]
   [math
    ["[0]" random]]]]
 [\\library
  ["[0]" / {"+" Res}]])

(def: pure
  Test
  (monad.do [! random.monad]
    [pre (# ! each %.nat random.nat)
     post (# ! each %.nat random.nat)
     .let [! identity.monad]]
    (_.for [/.Linear /.run! /.monad]
           (`` (all _.and
                    (~~ (template [<coverage> <bindings>]
                          [(_.coverage <coverage>
                             (<| (text#= (format pre post))
                                 (is (Identity Text))
                                 (/.run! !)
                                 (do (/.monad !)
                                   <bindings>
                                   (in (format left right)))))]
                          
                          [[/.Affine /.Key /.Res /.Ordered /.ordered
                            /.Relevant /.read]
                           [res|left (/.ordered ! pre)
                            res|right (/.ordered ! post)
                            right (/.read ! res|right)
                            left (/.read ! res|left)]]
                          [[/.Commutative /.commutative /.exchange]
                           [res|left (/.commutative ! pre)
                            res|right (/.commutative ! post)
                            _ ((/.exchange [1 0]) !)
                            left (/.read ! res|left)
                            right (/.read ! res|right)]]
                          [[/.group /.un_group]
                           [res|left (/.commutative ! pre)
                            res|right (/.commutative ! post)
                            _ ((/.group 2) !)
                            _ ((/.un_group 2) !)
                            right (/.read ! res|right)
                            left (/.read ! res|left)]]
                          [[/.lifted]
                           [left (/.lifted ! pre)
                            right (/.lifted ! post)]]
                          ))
                    )))))

(def: sync
  Test
  (monad.do [! random.monad]
    [pre (# ! each %.nat random.nat)
     post (# ! each %.nat random.nat)
     .let [! io.monad]]
    (_.for [/.Linear /.run! /.monad]
           (`` (all _.and
                    (~~ (template [<coverage> <bindings>]
                          [(_.coverage <coverage>
                             (<| (text#= (format pre post))
                                 io.run!
                                 (is (IO Text))
                                 (/.run! !)
                                 (do (/.monad !)
                                   <bindings>
                                   (in (format left right)))))]

                          [[/.Affine /.Key /.Res /.Ordered /.ordered
                            /.Relevant /.read]
                           [res|left (/.ordered ! pre)
                            res|right (/.ordered ! post)
                            right (/.read ! res|right)
                            left (/.read ! res|left)]]
                          [[/.Commutative /.commutative /.exchange]
                           [res|left (/.commutative ! pre)
                            res|right (/.commutative ! post)
                            _ ((/.exchange [1 0]) !)
                            left (/.read ! res|left)
                            right (/.read ! res|right)]]
                          [[/.group /.un_group]
                           [res|left (/.commutative ! pre)
                            res|right (/.commutative ! post)
                            _ ((/.group 2) !)
                            _ ((/.un_group 2) !)
                            right (/.read ! res|right)
                            left (/.read ! res|left)]]
                          [[/.lifted]
                           [left (/.lifted ! (io.io pre))
                            right (/.lifted ! (io.io post))]]
                          ))
                    )))))

(def: async
  Test
  (monad.do [! random.monad]
    [pre (# ! each %.nat random.nat)
     post (# ! each %.nat random.nat)
     .let [! async.monad]]
    (_.for [/.Linear /.run! /.monad]
           (`` (all _.and
                    (~~ (template [<coverage> <bindings>]
                          [(in (monad.do !
                                 [outcome (<| (is (Async Text))
                                              (/.run! !)
                                              (do (/.monad !)
                                                <bindings>
                                                (in (format left right))))]
                                 (_.coverage' <coverage>
                                   (text#= (format pre post)
                                           outcome))))]

                          [[/.Affine /.Key /.Res /.Ordered /.ordered
                            /.Relevant /.read]
                           [res|left (/.ordered ! pre)
                            res|right (/.ordered ! post)
                            right (/.read ! res|right)
                            left (/.read ! res|left)]]
                          [[/.Commutative /.commutative /.exchange]
                           [res|left (/.commutative ! pre)
                            res|right (/.commutative ! post)
                            _ ((/.exchange [1 0]) !)
                            left (/.read ! res|left)
                            right (/.read ! res|right)]]
                          [[/.group /.un_group]
                           [res|left (/.commutative ! pre)
                            res|right (/.commutative ! post)
                            _ ((/.group 2) !)
                            _ ((/.un_group 2) !)
                            right (/.read ! res|right)
                            left (/.read ! res|left)]]
                          [[/.lifted]
                           [left (/.lifted ! (async.resolved pre))
                            right (/.lifted ! (async.resolved post))]]
                          ))
                    )))))

(syntax: (with_error [exception <code>.symbol
                      to_expand <code>.any])
  (monad.do meta.monad
    [[_ _ exception] (meta.export exception)]
    (function (_ compiler)
      {.#Right [compiler
                (list (code.bit (case ((macro.single_expansion to_expand) compiler)
                                  {try.#Success _}
                                  false
                                  
                                  {try.#Failure error}
                                  true)))]})))

(def: .public test
  Test
  (<| (_.covering /._)
      (_.for [/.Procedure])
      (all _.and
           ..pure
           ..sync
           ..async

           (_.coverage [/.amount_cannot_be_zero]
             (`` (and (~~ (template [<group|un_group>]
                            [(with_error /.amount_cannot_be_zero
                               (<group|un_group> 0))]

                            [/.group]
                            [/.un_group]
                            )))))
           (_.coverage [/.index_cannot_be_repeated]
             (with_error /.index_cannot_be_repeated
               (/.exchange [0 0])))
           )))