;;; Copyright 2022 Edward L. Platt
;;;
;;; Licensed under the Apache License, Version 2.0 (the "License");
;;; you may not use this file except in compliance with the License.
;;; You may obtain a copy of the License at
;;;
;;;     http://www.apache.org/licenses/LICENSE-2.0
;;;
;;; Unless required by applicable law or agreed to in writing, software
;;; distributed under the License is distributed on an "AS IS" BASIS,
;;; WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
;;; See the License for the specific language governing permissions and
;;; limitations under the License.

(define-module (tests test-preference)
  #:use-module (srfi srfi-64)
  #:use-module (goblins)
  #:use-module (goblins vrun)
  #:use-module (goblins actor-lib methods)
  #:use-module (deliberate preference))

(test-begin "test-deliberate-preference")

(define a-vat (spawn-vat))
(define-vat-run a-run a-vat)

;; Tests for ^alternatives
(define question "What type of generator should we install?")
(define alts (a-run (spawn ^alternatives question '("solar" "wind"))))

(test-equal "What type of generator should we install?"
  (a-run ($ alts 'question)))

(test-equal '("solar" "wind")
  (a-run ($ alts 'alternatives)))

(a-run ($ alts 'add "hydro"))

(test-equal '("hydro" "solar" "wind")
  (a-run ($ alts 'alternatives)))


;; Tests for ^ranked-preference
(define alternatives
  (a-run (spawn ^alternatives
		question
		'("solar" "wind" "hydro"))))
(define (f1 alts) '(1 2 3))
(define (f2 alts) '(2 3 1))

(define pref (a-run (spawn ^ranked-preference alternatives)))

(test-equal '()
  (a-run ($ pref 'ranked)))

(test-equal #f
  (a-run ($ pref 'rank-of "solar")))

(a-run ($ pref 'set f1))

(test-equal 1
  (a-run ($ pref 'rank-of "solar")))

(test-equal 3
  (a-run ($ pref 'rank-of "hydro")))

(test-equal #f
  (a-run ($ pref 'rank-of "wildgoose")))

(a-run ($ pref 'set f2))

(test-equal 1
  (a-run ($ pref 'rank-of "hydro")))


;; Tests for ^ranked-profile
(define profile (a-run (spawn ^ranked-profile alternatives)))
(define pref1 (a-run ($ profile 'add-preference)))

(test-equal '()
  (a-run ($ pref1 'ranked)))

(define pref2 (a-run ($ profile 'add-preference)))
(a-run ($ pref1 'set f1))
(a-run ($ pref2 'set f2))

(define counts (a-run ($ profile 'counts)))

(test-equal '((1 . ("hydro" "solar" "wind"))
	      (1 . ("solar" "wind" "hydro")))
  counts)

(test-end "test-deliberate-preference")