guile/test-suite/tests/poe.test

;;;; poe.test --- exercise ice-9/poe.scm      -*- scheme -*-
;;;;
;;;; Copyright 2003, 2006 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-suite test-ice-9-poe)
  #:use-module (test-suite lib)
  #:use-module (ice-9 poe))


;;
;; pure-funcq
;;

(with-test-prefix "pure-funcq"

  (with-test-prefix "no args"
    (define obj (vector 123))  ;; not gc'ed
    (define called #f)
    (define (foo)
      (set! called #t)
      obj)

    (let ((func (pure-funcq foo)))

      (pass-if "called first"
	(set! called #f)
	(and (eq? obj (func))
	     called))

      (pass-if "not called second"
	(set! called #f)
	(and (eq? obj (func))
	     (not called)))))

  (with-test-prefix "1 arg"
    (define obj1 (vector 123))  ;; not gc'ed
    (define obj2 (vector 456))  ;; not gc'ed
    (define called #f)
    (define (foo sym)
      (set! called #t)
      (case sym
	((x) obj1)
	((y) obj2)
	(else (error "oops"))))

    (let ((func (pure-funcq foo)))

      (pass-if "called first x"
	(set! called #f)
	(and (eq? obj1 (func 'x))
	     called))

      (pass-if "not called second x"
	(set! called #f)
	(and (eq? obj1 (func 'x))
	     (not called)))

      (pass-if "called first y"
	(set! called #f)
	(and (eq? obj2 (func 'y))
	     called))

      (pass-if "not called second y"
	(set! called #f)
	(and (eq? obj2 (func 'y))
	     (not called)))

      (pass-if "not called third x"
	(set! called #f)
	(and (eq? obj1 (func 'x))
	     (not called))))))

;;
;; perfect-funcq
;;

(with-test-prefix "perfect-funcq"
  
  (with-test-prefix "no args"
    (define called #f)
    (define (foo)
      (set! called #t)
      'foo)
    
    (let ((func (perfect-funcq 31 foo)))
      
      (pass-if "called first"
	(set! called #f)
	(and (eq? 'foo (func))
	     called))
      
      (pass-if "not called second"
	(set! called #f)
	(and (eq? 'foo (func))
	     (not called)))))
  
  (with-test-prefix "1 arg"
    (define called #f)
    (define (foo str)
      (set! called #t)
      (string->number str))
    
    (let ((func (perfect-funcq 31 foo)))
      (define s1 "123")
      (define s2 "123")
      
      (pass-if "called first s1"
	(set! called #f)
	(and (= 123 (func s1))
	     called))
      
      (pass-if "not called second s1"
	(set! called #f)
	(and (= 123 (func s1))
	     (not called)))
      
      (pass-if "called first s2"
	(set! called #f)
	(and (= 123 (func s2))
	     called))
      
      (pass-if "not called second s2"
	(set! called #f)
	(and (= 123 (func s2))
	     (not called))))))