;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
; This file is part of "NOVA":  NOVA = search + COCOMO tools
; Copyright, 2008, Tim Menzies tim@menzies.us
;
; NOVA is free software: you can redistribute it and/or modify
; it under the terms of the GNU General Public License as published by
; the Free Software Foundation, either version 3 of the License, or
; (at your option) any later version.
;
; NOVA is distributed in the hope that it will be useful,
; but WITHOUT ANY WARRANTY; without even the implied warranty of
; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
; GNU General Public License for more details.
; You should have received a copy of the GNU General Public License
; a long with NOVA.  If not, see <http://www.gnu.org/licenses/>.
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
(in-package :wvu-lib-test.tricks)

(deftestsuite random-lib-test-suite (wvu-lib-tests) ()
   (:dynamic-variables (*seed*))
   (:setup (setf *seed* *seed0*)))

(addtest check-reset-seed
  (let (first-values second-values)
    (dotimes (x 10)
      (push (park-miller-randomizer) first-values))
    (reset-seed)
    (dotimes (x 10)
      (push (park-miller-randomizer) second-values))
    (ensure-same first-values
                 second-values
                 :test #'equalp)))

(addtest check-reset-seed-specify-seed
  (let ((test-seed 5)
        first-values second-values third-values)
    (dotimes (x 10)
      (push (park-miller-randomizer) first-values))
    (reset-seed test-seed)
    (dotimes (x 10)
      (push (park-miller-randomizer) second-values))
    (reset-seed test-seed)
    (dotimes (x 10)
      (push (park-miller-randomizer) third-values))
    (ensure-different first-values second-values
                      :test #'equalp)
    (ensure-same second-values
                 third-values
                 :test #'equalp)))


(addtest check-park-miller-randomizer
  (dotimes (i 10)
    (let ((rnd (park-miller-randomizer)))
      (ensure (< 0 rnd))
      (ensure (<= rnd 1)))))

(addtest check-my-random
  (let ((n 10))
    (dotimes (i 10)
      (let ((rnd (my-random n)))
        (ensure (<= 0 rnd))
        (ensure (< rnd n))))))

(addtest check-my-random-int
  (let ((n 10))
    (dotimes (i 10)
      (let ((rnd-int (my-random-int n)))
        (ensure (integerp rnd-int))
        (ensure (<= 0 rnd-int (1- n)))))))