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

(def: #export random
  (Random /.Versioning)
  ($_ random.and
      random.instant
      random.nat
      (random.list 5 (random.ascii/lower_alpha 3))
      ))

(def: #export test
  Test
  (<| (_.covering /._)
      (_.for [/.Versioning])
      ($_ _.and
          (_.for [/.equivalence]
                 ($equivalence.spec /.equivalence ..random))
          
          (do random.monad
            [expected ..random
             version (random.ascii/upper_alpha 3)]
            (_.cover [/.format /.parser]
                     (|> expected
                         (/.format version)
                         (<xml>.run (/.parser version))
                         (try\map (\ /.equivalence = expected))
                         (try.default false))))
          )))