(.using
 [library
  [lux "*"
   ["_" test {"+" Test}]
   [abstract
    [monad {"+" do}]
    [\\specification
     ["$[0]" equivalence]]]
   [control
    ["[0]" try ("[1]#[0]" functor)]
    [parser
     ["<[0]>" xml]]]
   [math
    ["[0]" random {"+" Random}]]]]
 [\\program
  ["[0]" /]])

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

(def: .public test
  Test
  (<| (_.covering /._)
      (_.for [/.Build]
             (all _.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))))
                  ))))