#lang racket/base
;; Tests for mapping.rkt.
;;
;;; Copyright 2010, 2011, 2012, 2013 Tony Garnock-Jones <tonyg@ccs.neu.edu>
;;;
;;; This file is part of marketplace-dns.
;;;
;;; marketplace-dns 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.
;;;
;;; marketplace-dns 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
;;; along with marketplace-dns. If not, see
;;; <http://www.gnu.org/licenses/>.

(require "mapping.rkt")
(require rackunit)

(define-mapping a->b b->a
  (a b))

(check-equal? (a->b 'a) 'b)
(check-equal? (b->a 'b) 'a)
(check-exn exn:fail:contract? (lambda () (a->b 123)))
(check-exn exn:fail:contract? (lambda () (a->b 'b)))
(check-exn exn:fail:contract? (lambda () (b->a 123)))
(check-exn exn:fail:contract? (lambda () (b->a 'a)))

(define-mapping c->d d->c
  #:forward-default (lambda (x) 'default-d)
  #:backward-default (lambda (x) 'default-c)
  (c 123)
  (e 234))

(check-equal? (c->d 'c) 123)
(check-equal? (d->c 234) 'e)
(check-equal? (c->d 'other) 'default-d)
(check-equal? (d->c '235) 'default-c)