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65 lines
2.3 KiB
Scheme
65 lines
2.3 KiB
Scheme
;;;; guardians.test --- test suite for Guile Guardians -*- scheme -*-
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;;;; Jim Blandy <jimb@red-bean.com> --- July 1999
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;;;;
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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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;;; These tests make some questionable assumptions.
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;;; - They assume that a GC will find all dead objects, so they
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;;; will become flaky if we have a generational GC.
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;;; - They assume that objects won't be saved by the guardian until
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;;; they explicitly invoke GC --- in other words, they assume that GC
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;;; won't happen too often.
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(gc)
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(define g1 (make-guardian))
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(define not-g1-garbage (list 'not-g1-garbage))
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(g1 not-g1-garbage)
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(g1 (list 'g1-garbage))
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(pass-if "g1-garbage not collected yet" (equal? (g1) #f))
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(gc)
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(pass-if "g1-garbage saved" (equal? (g1) '(g1-garbage)))
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;;; Who guards the guardian?
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(gc)
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(define g2 (make-guardian))
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(g2 (list 'g2-garbage))
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(define g3 (make-guardian))
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(g3 (list 'g3-garbage))
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(g3 g2)
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(pass-if "g2-garbage not collected yet" (equal? (g2) #f))
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(pass-if "g3-garbage not collected yet" (equal? (g3) #f))
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(set! g2 #f)
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(gc)
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(let ((seen-g3-garbage #f)
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(seen-g2 #f)
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(seen-something-else #f))
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(let loop ()
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(let ((saved (g3)))
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(if saved
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(begin
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(cond
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((equal? saved '(g3-garbage)) (set! seen-g3-garbage #t))
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((procedure? saved) (set! seen-g2 saved))
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(else (set! seen-something-else #t)))
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(loop)))))
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(pass-if "g3-garbage saved" seen-g3-garbage)
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(pass-if "g2-saved" (procedure? seen-g2))
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(pass-if "nothing else saved" (not seen-something-else))
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(pass-if "g2-garbage saved" (and (procedure? seen-g2)
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(equal? (seen-g2) '(g2-garbage)))))
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