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(.using
  [library
   [lux "*"
    ["_" test {"+" Test}]
    [abstract
     [monad {"+" do}]
     [\\specification
      ["$[0]" equivalence]]]
    [control
     ["[0]" try ("[1]#[0]" functor)]
     [parser
      ["<[0]>" text]]]
    [time
     ["[0]" instant ("[1]#[0]" equivalence)]]
    [math
     ["[0]" random {"+" Random}]
     [number
      ["i" int]]]]]
  [\\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])
      ($_ _.and
          (_.for [/.equivalence]
                 ($equivalence.spec /.equivalence ..random))

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

          /date.test
          /time.test
          )))