guile/test-suite/tests/q.test

;;;; q.test --- test (ice-9 q) module -*- scheme -*-
;;;; 
;;;; Copyright 2004, 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 2.1 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-q)
  #:use-module (test-suite lib)
  #:use-module (ice-9 q))


;; Call (THUNK) and return #t if it throws 'q-empty, or #f it not.
(define (true-if-catch-q-empty thunk)
  (catch 'q-empty
    (lambda ()
      (thunk)
      #f)
    (lambda args
      #t)))


;;;
;;; q-pop!
;;;

(with-test-prefix "q-pop!"

  (with-test-prefix "no elems"
    (let ((q (make-q)))
      (pass-if "empty" (true-if-catch-q-empty
			(lambda ()
			  (q-pop! q))))
      (pass-if "valid at end" (q? q))))

  (with-test-prefix "one elem"
    (let ((x (cons 1 2))
	  (q (make-q)))
      (q-push! q x)

      (pass-if "x" (eq? x (q-pop! q)))
      (pass-if "valid after x" (q? q))
      (pass-if "empty" (true-if-catch-q-empty
			(lambda ()
			  (q-pop! q))))
      (pass-if "valid at end" (q? q))))

  (with-test-prefix "two elems"
    (let ((x (cons 1 2))
	  (y (cons 3 4))
	  (q (make-q)))
      (q-push! q x)
      (q-push! q y)

      (pass-if "y" (eq? y (q-pop! q)))
      (pass-if "valid after y" (q? q))
      (pass-if "x" (eq? x (q-pop! q)))
      (pass-if "valid after x" (q? q))
      (pass-if "empty" (true-if-catch-q-empty
			(lambda ()
			  (q-pop! q))))
      (pass-if "valid at end" (q? q))))

  (with-test-prefix "three elems"
    (let ((x (cons 1 2))
	  (y (cons 3 4))
	  (z (cons 5 6))
	  (q (make-q)))
      (q-push! q x)
      (q-push! q y)
      (q-push! q z)

      (pass-if "z" (eq? z (q-pop! q)))
      (pass-if "valid after z" (q? q))
      (pass-if "y" (eq? y (q-pop! q)))
      (pass-if "valid after y" (q? q))
      (pass-if "x" (eq? x (q-pop! q)))
      (pass-if "valid after x" (q? q))
      (pass-if "empty" (true-if-catch-q-empty
			(lambda ()
			  (q-pop! q))))
      (pass-if "valid at end" (q? q)))))