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(.using
 [library
  [lux {"-" Variant Record}
   ["_" test {"+" Test}]
   ["@" target]
   ["[0]" debug]
   [abstract
    codec
    [monad {"+" do}]
    ["[0]" equivalence {"+" Equivalence}
     ["poly/[1]" \\poly]]
    [\\specification
     ["$[0]" equivalence]
     ["$[0]" codec]]]
   [control
    ["[0]" try]
    ["p" parser
     ... TODO: Get rid of this import ASAP
     [json {"+"}]]]
   [data
    ["[0]" bit]
    ["[0]" text]
    [format
     [json {"+" JSON}
      [\\poly
       ["[0]" /]]]]
    [collection
     [sequence {"+" sequence}]
     ["d" dictionary]
     ["[0]" list]]]
   [type
    ["[0]" unit]]
   [math
    ["[0]" random {"+" Random}]
    [number
     ["n" nat]
     ["[0]" frac]]]
   [time
    ["ti" instant]
    ["tda" date]
    ... ["tdu" duration]
    ]]]
 [test
  [lux
   [time
    ["_[0]" instant]
    ... ["_[0]" duration]
    ]]])

(type: Variant
  (.Variant
   {#Bit Bit}
   {#Text Text}
   {#Frac Frac}))

(type: Recursive
  (Rec Recursive
    (.Variant
     {#Number Frac}
     {#Addition Frac Recursive})))

(type: Record
  (.Record
   [#bit Bit
    #frac Frac
    #text Text
    #maybe (Maybe Frac)
    #list (List Frac)
    #dictionary (d.Dictionary Text Frac)
    #variant Variant
    #tuple [Bit Text Frac]
    #recursive Recursive
    ... #instant ti.Instant
    ... #duration tdu.Duration
    #date tda.Date
    #grams (unit.Qty unit.Gram)]))

(def: gen_recursive
  (Random Recursive)
  (random.rec
   (function (_ gen_recursive)
     (random.or random.safe_frac
                (random.and random.safe_frac
                            gen_recursive)))))

(def: qty
  (All (_ unit) (Random (unit.Qty unit)))
  (# random.monad each (debug.private unit.in') random.int))

(def: gen_record
  (Random Record)
  (do [! random.monad]
    [size (# ! each (n.% 2) random.nat)]
    (all random.and
         random.bit
         random.safe_frac
         (random.unicode size)
         (random.maybe random.safe_frac)
         (random.list size random.safe_frac)
         (random.dictionary text.hash size (random.unicode size) random.safe_frac)
         (all random.or random.bit (random.unicode size) random.safe_frac)
         (all random.and random.bit (random.unicode size) random.safe_frac)
         ..gen_recursive
         ... _instant.instant
         ... _duration.duration
         random.date
         ..qty
         )))

(for @.old (these)
     (these (def: equivalence
              (Equivalence Record)
              (poly/equivalence.equivalence Record))

            (def: codec
              (Codec JSON Record)
              (/.codec Record))))

(def: .public test
  Test
  (<| (_.covering /._)
      (_.for [/.codec]
             (for @.old (_.property "PLACEHOLDER" true)
                  ($codec.spec ..equivalence ..codec ..gen_record)))))