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(.module:
  [lux #*
   [control
    [monad (#+ Monad do)]
    pipe]
   [data
    [text ("text/." Equivalence<Text>)]]
   [math
    ["r" random]]
   ["_" test (#+ Test)]]
  {[-1 ""]
   ["." / (#+ import: class: interface: object)]})

(import: (java/util/concurrent/Callable a))

(import: java/lang/Exception
  (new [String]))

(import: java/lang/Object)

(import: (java/lang/Class a)
  (getName [] String))

(import: java/lang/System
  (#static out java/io/PrintStream)
  (#static currentTimeMillis [] #io long)
  (#static getenv [String] #io #? String))

(class: #final (TestClass A) [Runnable]
  ## Fields
  (#private foo boolean)
  (#private bar A)
  (#private baz java/lang/Object)
  ## Methods
  (#public [] (new {value A}) []
           (exec (:= ::foo #1)
             (:= ::bar value)
             (:= ::baz "")
             []))
  (#public (virtual) java/lang/Object
           "")
  (#public #static (static) java/lang/Object
           "")
  (Runnable [] (run) void
            []))

(def: test-runnable
  (object [] [Runnable]
    []
    (Runnable [] (run) void
              [])))

(def: test-callable
  (object [a] [(Callable a)]
    []
    (Callable [] (call) a
              (undefined))))

(interface: TestInterface
  ([] foo [boolean String] void #throws [Exception]))

(def: conversions
  Test
  (do r.Monad<Random>
    [sample r.int]
    (`` ($_ _.and
            (~~ (do-template [<to> <from> <message>]
                  [(_.test <message>
                           (or (|> sample <to> <from> (i/= sample))
                               (let [capped-sample (|> sample <to> <from>)]
                                 (|> capped-sample <to> <from> (i/= capped-sample)))))]

                  [/.long-to-byte /.byte-to-long "Can succesfully convert to/from byte."]
                  [/.long-to-short /.short-to-long "Can succesfully convert to/from short."]
                  [/.long-to-int /.int-to-long "Can succesfully convert to/from int."]
                  [/.long-to-float /.float-to-long "Can succesfully convert to/from float."]
                  [/.long-to-double /.double-to-long "Can succesfully convert to/from double."]
                  [(<| /.int-to-char /.long-to-int) (<| /.int-to-long /.char-to-int) "Can succesfully convert to/from char."]
                  ))
            ))))

(def: miscellaneous
  Test
  (do r.Monad<Random>
    [sample (r.ascii 1)]
    ($_ _.and
        (_.test "Can check if an object is of a certain class."
                (and (case (/.check String sample) (#.Some _) true #.None false)
                     (case (/.check Long sample) (#.Some _) false #.None true)
                     (case (/.check Object sample) (#.Some _) true #.None false)
                     (case (/.check Object (/.null)) (#.Some _) false #.None true)))

        (_.test "Can run code in a 'synchronized' block."
                (/.synchronized sample #1))

        (_.test "Can access Class instances."
                (text/= "java.lang.Class" (Class::getName (/.class-for java/lang/Class))))

        (_.test "Can check if a value is null."
                (and (/.null? (/.null))
                     (not (/.null? sample))))

        (_.test "Can safely convert nullable references into Maybe values."
                (and (|> (: (Maybe Object) (/.??? (/.null)))
                         (case> #.None #1
                                _ #0))
                     (|> (: (Maybe Object) (/.??? sample))
                         (case> (#.Some _) #1
                                _ #0))))
        )))

(def: arrays
  Test
  (do r.Monad<Random>
    [size (|> r.nat (:: @ map (|>> (n/% 100) (n/max 1))))
     idx (|> r.nat (:: @ map (n/% size)))
     value r.int]
    ($_ _.and
        (_.test "Can create arrays of some length."
                (n/= size (/.array-length (/.array Long size))))

        (_.test "Can set and get array values."
                (let [arr (/.array Long size)]
                  (exec (/.array-write idx value arr)
                    (i/= value (/.array-read idx arr))))))))

(def: #export test
  ($_ _.and
      (<| (_.context "Conversions.")
          ..conversions)
      (<| (_.context "Miscellaneous.")
          ..miscellaneous)
      (<| (_.context "Arrays.")
          ..arrays)))