test-suite/tests/fluids.test

   1 ;;;;                                                          -*- scheme -*-
   2 ;;;; fluids.test --- test suite for fluid values
   3 ;;;;
   4 ;;;; Copyright (C) 2010 Free Software Foundation, Inc.
   5 ;;;;
   6 ;;;; This library is free software; you can redistribute it and/or
   7 ;;;; modify it under the terms of the GNU Lesser General Public
   8 ;;;; License as published by the Free Software Foundation; either
   9 ;;;; version 3 of the License, or (at your option) any later version.
  10 ;;;;
  11 ;;;; This library is distributed in the hope that it will be useful,
  12 ;;;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 ;;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14 ;;;; Lesser General Public License for more details.
  15 ;;;;
  16 ;;;; You should have received a copy of the GNU Lesser General Public
  17 ;;;; License along with this library; if not, write to the Free Software
  18 ;;;; Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  19
  20 (define-module (test-suite test-fluids)
  21   :use-module (test-suite lib))
  22
  23
  24 (define a (make-fluid))
  25 (define b (make-fluid))
  26 (define c #f)
  27
  28 (with-test-prefix "initial fluid values"
  29   (pass-if "fluid-ref uninitialized fluid is #f"
  30     (not (fluid-ref a))))
  31
  32 (with-test-prefix "with-fluids with non-fluid"
  33   (pass-if-exception "exception raised if nonfluid passed to with-fluids"
  34                      exception:wrong-type-arg
  35     (with-fluids ((c #t))
  36       c))
  37
  38   (expect-fail "fluids not modified if nonfluid passed to with-fluids"
  39     (catch 'wrong-type-arg
  40       (lambda ()
  41         (with-fluids ((a #t)
  42                       (c #t))
  43           #f))
  44       (lambda _
  45         (not (fluid-ref a))))))
  46
  47 (with-test-prefix "with-fluids with duplicate fluid"
  48   (pass-if "last value wins"
  49     (with-fluids ((a 1)
  50                   (a 2))
  51       (eqv? (fluid-ref a) 2)))
  52
  53   (pass-if "original value restored"
  54     (and (with-fluids ((a 1)
  55                        (a 2))
  56            (eqv? (fluid-ref a) 2))
  57          (eqv? (fluid-ref a) #f))))