;;;; match.test --- (ice-9 match)  -*- mode: scheme; coding: utf-8; -*-
;;;;
;;;; 	Copyright (C) 2010 Free Software Foundation, Inc.
;;;;
;;;; This library is free software; you can redistribute it and/or
;;;; modify it under the terms of the GNU Lesser General Public
;;;; License as published by the Free Software Foundation; either
;;;; version 3 of the License, or (at your option) any later version.
;;;;
;;;; This library 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
;;;; Lesser General Public License for more details.
;;;;
;;;; You should have received a copy of the GNU Lesser General Public
;;;; License along with this library; if not, write to the Free Software
;;;; Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA

(define-module (test-match)
  #:use-module (ice-9 match)
  #:use-module (test-suite lib))

(define exception:match-error
  (cons 'match-error "^.*$"))


(with-test-prefix "matches"

  (pass-if "wildcard"
    (match "hello" (_ #t)))

  (pass-if "symbol"
    (match 'foo ('foo #t)))

  (pass-if "string"
    (match "bar" ("bar" #t)))

  (pass-if "number"
    (match 777 (777 #t)))

  (pass-if "char"
    (match #\g (#\g #t)))

  (pass-if "sexp"
    (match '(a b c) ('(a b c) #t)))

  (pass-if "predicate"
    (match '(a 1 2)
      (('a (and (? odd?) one) (? even?))
       (= one 1))))

  (pass-if "list"
    (let ((lst '(a b c)))
      (match lst
        ((x y z)
         (equal? (list x y z) lst)))))

  (pass-if "list rest..."
    (let ((lst '(a b c)))
      (match lst
        ((x rest ...)
         (and (eq? x 'a) (equal? rest '(b c)))))))

  (pass-if "list . rest"
    (let ((lst '(a b c)))
      (match lst
        ((x . rest)
         (and (eq? x 'a) (equal? rest '(b c)))))))

  (pass-if "tree"
    (let ((tree '(one (two 2) (three 3 (and 4 (and 5))))))
      (match tree
        (('one ('two x) ('three y ('and z '(and 5))))
         (equal? (list x y z) '(2 3 4)))))))


(with-test-prefix "doesn't match"

  (pass-if-exception "tree"
    exception:match-error
    (match '(a (b c))
      ((foo (bar)) #t))))