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210 lines
7 KiB
Scheme
210 lines
7 KiB
Scheme
;;;; weaks.test --- tests guile's weaks -*- scheme -*-
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;;;; Copyright (C) 1999, 2001 Free Software Foundation, Inc.
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;;;;
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;;;; This program is free software; you can redistribute it and/or modify
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;;;; it under the terms of the GNU General Public License as published by
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;;;; the Free Software Foundation; either version 2, or (at your option)
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;;;; any later version.
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;;;;
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;;;; This program is distributed in the hope that it will be useful,
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;;;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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;;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;;;; GNU General Public License for more details.
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;;;;
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;;;; You should have received a copy of the GNU General Public License
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;;;; along with this software; see the file COPYING. If not, write to
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;;;; the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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;;;; Boston, MA 02110-1301 USA
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;;;;
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;;;; As a special exception, the Free Software Foundation gives permission
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;;;; for additional uses of the text contained in its release of GUILE.
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;;;;
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;;;; The exception is that, if you link the GUILE library with other files
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;;;; to produce an executable, this does not by itself cause the
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;;;; resulting executable to be covered by the GNU General Public License.
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;;;; Your use of that executable is in no way restricted on account of
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;;;; linking the GUILE library code into it.
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;;;;
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;;;; This exception does not however invalidate any other reasons why
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;;;; the executable file might be covered by the GNU General Public License.
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;;;;
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;;;; This exception applies only to the code released by the
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;;;; Free Software Foundation under the name GUILE. If you copy
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;;;; code from other Free Software Foundation releases into a copy of
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;;;; GUILE, as the General Public License permits, the exception does
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;;;; not apply to the code that you add in this way. To avoid misleading
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;;;; anyone as to the status of such modified files, you must delete
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;;;; this exception notice from them.
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;;;;
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;;;; If you write modifications of your own for GUILE, it is your choice
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;;;; whether to permit this exception to apply to your modifications.
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;;;; If you do not wish that, delete this exception notice.
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;;; {Description}
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;;; This is a semi test suite for weaks; I say semi, because weaks
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;;; are pretty non-deterministic given the amount of information we
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;;; can infer from scheme.
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;;;
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;;; In particular, we can't always reliably test the more important
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;;; aspects of weaks (i.e., that an object is removed when it's dead)
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;;; because we have no way of knowing for certain that the object is
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;;; really dead. It tests it anyway, but the failures of any `death'
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;;; tests really shouldn't be surprising.
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;;;
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;;; Interpret failures in the dying functions here as a hint that you
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;;; should look at any changes you've made involving weaks
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;;; (everything else should always pass), but there are a host of
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;;; other reasons why they might not work as tested here, so if you
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;;; haven't done anything to weaks, don't sweat it :)
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;;; Creation functions
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(with-test-prefix
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"weak-creation"
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(with-test-prefix "make-weak-vector"
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(pass-if "normal"
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(make-weak-vector 10 #f)
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#t)
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(pass-if-exception "bad size"
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exception:wrong-type-arg
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(make-weak-vector 'foo)))
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(with-test-prefix "list->weak-vector"
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(pass-if "create"
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(let* ((lst '(a b c d e f g))
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(wv (list->weak-vector lst)))
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(and (eq? (vector-ref wv 0) 'a)
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(eq? (vector-ref wv 1) 'b)
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(eq? (vector-ref wv 2) 'c)
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(eq? (vector-ref wv 3) 'd)
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(eq? (vector-ref wv 4) 'e)
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(eq? (vector-ref wv 5) 'f)
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(eq? (vector-ref wv 6) 'g))))
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(pass-if-exception "bad-args"
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exception:wrong-type-arg
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(list->weak-vector 32)))
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(with-test-prefix "make-weak-key-hash-table"
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(pass-if "create"
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(make-weak-key-hash-table 17)
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#t)
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(pass-if-exception "bad-args"
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exception:wrong-type-arg
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(make-weak-key-hash-table '(bad arg))))
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(with-test-prefix "make-weak-value-hash-table"
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(pass-if "create"
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(make-weak-value-hash-table 17)
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#t)
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(pass-if-exception "bad-args"
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exception:wrong-type-arg
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(make-weak-value-hash-table '(bad arg))))
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(with-test-prefix "make-doubly-weak-hash-table"
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(pass-if "create"
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(make-doubly-weak-hash-table 17)
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#t)
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(pass-if-exception "bad-args"
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exception:wrong-type-arg
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(make-doubly-weak-hash-table '(bad arg)))))
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;; This should remove most of the non-dying problems associated with
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;; trying this inside a closure
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(define global-weak (make-weak-vector 10 #f))
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(begin
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(vector-set! global-weak 0 "string")
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(vector-set! global-weak 1 "beans")
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(vector-set! global-weak 2 "to")
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(vector-set! global-weak 3 "utah")
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(vector-set! global-weak 4 "yum yum")
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(gc))
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;;; Normal weak vectors
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(let ((x (make-weak-vector 10 #f))
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(bar "bar"))
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(with-test-prefix
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"weak-vector"
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(pass-if "lives"
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(begin
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(vector-set! x 0 bar)
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(gc)
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(and (vector-ref x 0) (eq? bar (vector-ref x 0)))))
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(pass-if "dies"
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(begin
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(gc)
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(or (not (vector-ref global-weak 0))
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(not (vector-ref global-weak 1))
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(not (vector-ref global-weak 2))
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(not (vector-ref global-weak 3))
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(not (vector-ref global-weak 4)))))))
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(let ((x (make-weak-key-hash-table 17))
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(y (make-weak-value-hash-table 17))
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(z (make-doubly-weak-hash-table 17))
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(test-key "foo")
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(test-value "bar"))
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(with-test-prefix
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"weak-hash"
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(pass-if "lives"
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(begin
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(hashq-set! x test-key test-value)
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(hashq-set! y test-key test-value)
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(hashq-set! z test-key test-value)
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(gc)
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(gc)
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(and (hashq-ref x test-key)
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(hashq-ref y test-key)
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(hashq-ref z test-key)
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#t)))
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(pass-if "weak-key dies"
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(begin
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(hashq-set! x "this" "is")
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(hashq-set! x "a" "test")
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(hashq-set! x "of" "the")
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(hashq-set! x "emergency" "weak")
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(hashq-set! x "key" "hash system")
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(gc)
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(and
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(or (not (hashq-ref x "this"))
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(not (hashq-ref x "a"))
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(not (hashq-ref x "of"))
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(not (hashq-ref x "emergency"))
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(not (hashq-ref x "key")))
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(hashq-ref x test-key)
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#t)))
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(pass-if "weak-value dies"
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(begin
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(hashq-set! y "this" "is")
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(hashq-set! y "a" "test")
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(hashq-set! y "of" "the")
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(hashq-set! y "emergency" "weak")
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(hashq-set! y "value" "hash system")
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(gc)
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(and (or (not (hashq-ref y "this"))
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(not (hashq-ref y "a"))
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(not (hashq-ref y "of"))
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(not (hashq-ref y "emergency"))
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(not (hashq-ref y "value")))
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(hashq-ref y test-key)
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#t)))
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(pass-if "doubly-weak dies"
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(begin
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(hashq-set! z "this" "is")
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(hashq-set! z "a" "test")
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(hashq-set! z "of" "the")
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(hashq-set! z "emergency" "weak")
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(hashq-set! z "all" "hash system")
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(gc)
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(and (or (not (hashq-ref z "this"))
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(not (hashq-ref z "a"))
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(not (hashq-ref z "of"))
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(not (hashq-ref z "emergency"))
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(not (hashq-ref z "all")))
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(hashq-ref z test-key)
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#t)))))
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