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;;;; weaks.test --- tests guile's weaks -*- scheme -*-
;;;; Copyright (C) 1999, 2001, 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 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
;;; {Description}
;;; This is a semi test suite for weaks; I say semi, because weaks
;;; are pretty non-deterministic given the amount of information we
;;; can infer from scheme.
;;;
;;; In particular, we can't always reliably test the more important
;;; aspects of weaks (i.e., that an object is removed when it's dead)
;;; because we have no way of knowing for certain that the object is
;;; really dead. It tests it anyway, but the failures of any `death'
;;; tests really shouldn't be surprising.
;;;
;;; Interpret failures in the dying functions here as a hint that you
;;; should look at any changes you've made involving weaks
;;; (everything else should always pass), but there are a host of
;;; other reasons why they might not work as tested here, so if you
;;; haven't done anything to weaks, don't sweat it :)
(use-modules (test-suite lib)
(ice-9 weak-vector))
;;; Creation functions
(with-test-prefix
"weak-creation"
(with-test-prefix "make-weak-vector"
(pass-if "normal"
(make-weak-vector 10 #f)
#t)
(pass-if-exception "bad size"
exception:wrong-type-arg
(make-weak-vector 'foo)))
(with-test-prefix "list->weak-vector"
(pass-if "create"
(let* ((lst '(a b c d e f g))
(wv (list->weak-vector lst)))
(and (eq? (vector-ref wv 0) 'a)
(eq? (vector-ref wv 1) 'b)
(eq? (vector-ref wv 2) 'c)
(eq? (vector-ref wv 3) 'd)
(eq? (vector-ref wv 4) 'e)
(eq? (vector-ref wv 5) 'f)
(eq? (vector-ref wv 6) 'g))))
(pass-if-exception "bad-args"
exception:wrong-type-arg
(list->weak-vector 32)))
(with-test-prefix "make-weak-key-alist-vector"
(pass-if "create"
(make-weak-key-alist-vector 17)
#t)
(pass-if-exception "bad-args"
exception:wrong-type-arg
(make-weak-key-alist-vector '(bad arg))))
(with-test-prefix "make-weak-value-alist-vector"
(pass-if "create"
(make-weak-value-alist-vector 17)
#t)
(pass-if-exception "bad-args"
exception:wrong-type-arg
(make-weak-value-alist-vector '(bad arg))))
(with-test-prefix "make-doubly-weak-alist-vector"
(pass-if "create"
(make-doubly-weak-alist-vector 17)
#t)
(pass-if-exception "bad-args"
exception:wrong-type-arg
(make-doubly-weak-alist-vector '(bad arg)))))
;; This should remove most of the non-dying problems associated with
;; trying this inside a closure
(define global-weak (make-weak-vector 10 #f))
(begin
(vector-set! global-weak 0 "string")
(vector-set! global-weak 1 "beans")
(vector-set! global-weak 2 "to")
(vector-set! global-weak 3 "utah")
(vector-set! global-weak 4 "yum yum")
(gc))
;;; Normal weak vectors
(let ((x (make-weak-vector 10 #f))
(bar "bar"))
(with-test-prefix
"weak-vector"
(pass-if "lives"
(begin
(vector-set! x 0 bar)
(gc)
(and (vector-ref x 0) (eq? bar (vector-ref x 0)))))
(pass-if "dies"
(begin
(gc)
(or (and (not (vector-ref global-weak 0))
(not (vector-ref global-weak 1))
(not (vector-ref global-weak 2))
(not (vector-ref global-weak 3))
(not (vector-ref global-weak 4)))
(throw 'unresolved))))))
(let ((x (make-weak-key-alist-vector 17))
(y (make-weak-value-alist-vector 17))
(z (make-doubly-weak-alist-vector 17))
(test-key "foo")
(test-value "bar"))
(with-test-prefix
"weak-hash"
(pass-if "lives"
(begin
(hashq-set! x test-key test-value)
(hashq-set! y test-key test-value)
(hashq-set! z test-key test-value)
(gc)
(gc)
(and (hashq-ref x test-key)
(hashq-ref y test-key)
(hashq-ref z test-key)
#t)))
(pass-if "weak-key dies"
(begin
(hashq-set! x "this" "is")
(hashq-set! x "a" "test")
(hashq-set! x "of" "the")
(hashq-set! x "emergency" "weak")
(hashq-set! x "key" "hash system")
(gc)
(and
(or (not (hashq-ref x "this"))
(not (hashq-ref x "a"))
(not (hashq-ref x "of"))
(not (hashq-ref x "emergency"))
(not (hashq-ref x "key")))
(hashq-ref x test-key)
#t)))
(pass-if "weak-value dies"
(begin
(hashq-set! y "this" "is")
(hashq-set! y "a" "test")
(hashq-set! y "of" "the")
(hashq-set! y "emergency" "weak")
(hashq-set! y "value" "hash system")
(gc)
(and (or (not (hashq-ref y "this"))
(not (hashq-ref y "a"))
(not (hashq-ref y "of"))
(not (hashq-ref y "emergency"))
(not (hashq-ref y "value")))
(hashq-ref y test-key)
#t)))
(pass-if "doubly-weak dies"
(begin
(hashq-set! z "this" "is")
(hashq-set! z "a" "test")
(hashq-set! z "of" "the")
(hashq-set! z "emergency" "weak")
(hashq-set! z "all" "hash system")
(gc)
(and (or (not (hashq-ref z "this"))
(not (hashq-ref z "a"))
(not (hashq-ref z "of"))
(not (hashq-ref z "emergency"))
(not (hashq-ref z "all")))
(hashq-ref z test-key)
#t)))))
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