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(.require
 [library
  [lux (.except)
   ["_" test (.only Test)]
   [abstract
    [monad (.only do)]
    [\\specification
     ["$[0]" equivalence]]]
   [control
    ["[0]" try (.use "[1]#[0]" functor)]]
   [data
    ["[0]" text
     ["<[1]>" \\parser]]]
   [math
    ["[0]" random (.only Random)]
    [number
     ["i" int]]]
   [world
    [time
     ["[0]" instant (.use "[1]#[0]" equivalence)]]]]]
 [\\program
  ["[0]" /]]
 ["[0]" /
  ["[1][0]" date]
  ["[1][0]" time]])

(def .public random
  (Random /.Time)
  (do random.monad
    [date /date.random
     time /time.random]
    (in [date time])))

(def .public test
  Test
  (<| (_.covering /._)
      (_.for [/.Time])
      (all _.and
           (_.for [/.equivalence]
                  ($equivalence.spec /.equivalence ..random))

           (do random.monad
             [expected ..random]
             (_.coverage [/.format /.parser]
               (|> expected
                   /.format
                   (<text>.result /.parser)
                   (try#each (at /.equivalence = expected))
                   (try.else false))))
           (do random.monad
             [expected ..random]
             (_.coverage [/.instant /.of_instant]
               (|> expected
                   /.instant
                   /.of_instant
                   (try#each (at /.equivalence = expected))
                   (try.else false))))
           (_.coverage [/.epoch]
             (instant#= instant.epoch (/.instant /.epoch)))

           /date.test
           /time.test
           )))