(.module:
  [library
   [lux #*
    ["_" test (#+ Test)]
    [abstract
     [monad (#+ do)]
     [\\specification
      ["$." equivalence]]]
    [control
     ["." try ("#\." functor)]
     [parser
      ["<.>" xml]]]
    [math
     ["." random (#+ Random)]]]]
  [\\program
   ["." /]])

(def: .public random
  (Random /.Build)
  random.nat)

(def: .public test
  Test
  (<| (_.covering /._)
      (_.for [/.Build]
             ($_ _.and
                 (_.for [/.equivalence]
                        ($equivalence.spec /.equivalence ..random))
                 
                 (do random.monad
                   [expected ..random]
                   (_.cover [/.format /.parser]
                            (|> expected
                                /.format
                                list
                                (<xml>.result /.parser)
                                (try\each (\ /.equivalence = expected))
                                (try.else false))))
                 ))))