;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
; 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 line-lib-test-suite (wvu-lib-tests) ())

(addtest check-point-to-line
  (let ((l (ensure-no-warning (point-to-line 1 1 3 3))))
    (ensure-same (line-m l)
                 1)
    (ensure-same (line-b l)
                 0)
    (ensure-null (line-verticalp l))))

(addtest check-point-to-line-horizonal
  (let ((l (ensure-no-warning (point-to-line 1 1 3 1))))
    (ensure-same (line-m l)
                 0)
    (ensure-same (line-b l)
                 1)
    (ensure-null (line-verticalp l))))

(addtest check-point-to-line-vertical
  (let ((l (ensure-no-warning (point-to-line 1 1 1 3))))
    (ensure-null (line-m l))
    (ensure-null (line-b l))
    (ensure (line-verticalp l))))

(addtest check-line-y
  (let ((l (point-to-line 1 1 3 3)))
    (ensure-same (ensure-no-warning (line-y 2 l))
                 2)
    (ensure-same (ensure-no-warning (line-y 5 l))
                 5)))

(addtest check-line-y-horizonal
  (let ((l (point-to-line 1 1 3 1)))
    (ensure-same (ensure-no-warning (line-y 2 l))
                 1)
    (ensure-same (ensure-no-warning (line-y 5 l))
                 1)))

(addtest check-line-y-vertical
  (let ((l (point-to-line 1 1 1 3)))
    (ensure-error (line-y 2 l))
    (ensure-error (line-y 3 l))))


(addtest check-interpolates
  (let ((points '((0 . 0) (5 . 5) (10 . 15))))
    (ensure-same (interpolates -1 points)
                 0
                 :test #'equalp)
    (ensure-same (interpolates 0 points)
                 0
                 :test #'equalp)
    (ensure-same (interpolates 2 points)
                 2
                 :test #'equalp)
    (ensure-same (interpolates 5 points)
                 5
                 :test #'equalp)
    (ensure-same (interpolates 8 points)
                 11
                 :test #'equalp)
    (ensure-same (interpolates 10 points)
                 15
                 :test #'equalp)
    (ensure-same (interpolates 12 points)
                 15
                 :test #'equalp)))