test-suite/tests/srfi-39.test

   1 ;;;; srfi-39.test --- -*- scheme -*-
   2 ;;;;
   3 ;;;; Copyright (C) 2004, 2005, 2006, 2008 Free Software Foundation, Inc.
   4 ;;;;
   5 ;;;; This library is free software; you can redistribute it and/or
   6 ;;;; modify it under the terms of the GNU Lesser General Public
   7 ;;;; License as published by the Free Software Foundation; either
   8 ;;;; version 3 of the License, or (at your option) any later version.
   9 ;;;;
  10 ;;;; This library is distributed in the hope that it will be useful,
  11 ;;;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 ;;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13 ;;;; Lesser General Public License for more details.
  14 ;;;;
  15 ;;;; You should have received a copy of the GNU Lesser General Public
  16 ;;;; License along with this library; if not, write to the Free Software
  17 ;;;; Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  18
  19 (define-module (test-srfi-39)
  20   #:use-module (test-suite lib)
  21   #:use-module (srfi srfi-34)
  22   #:use-module (srfi srfi-39)
  23   #:duplicates (last) ;; avoid warning about srfi-34 replacing `raise'
  24   )
  25
  26 (define a (make-parameter 3))
  27 (define b (make-parameter 4))
  28
  29 (define (check a b a-val b-val)
  30   (and (eqv? (a) a-val)) (eqv? (b) b-val))
  31
  32 (define c (make-parameter 2 (lambda (x) (if (< x 10) x 10))))
  33 (define d (make-parameter 15 (lambda (x) (if (< x 10) x 10))))
  34
  35 (with-test-prefix "SRFI-39"
  36
  37   (pass-if "test 1"
  38     (check a b 3 4))
  39
  40   (pass-if "test 2"
  41     (parameterize ((a 2) (b 1))
  42       (and (check a b 2 1)
  43            (parameterize ((b 8))
  44              (check a b 2 8)))))
  45
  46   (pass-if "test 3"
  47     (check a b 3 4))
  48
  49   (pass-if "test 4"
  50     (check c d 2 10))
  51
  52   (pass-if "test 5"
  53     (parameterize ((a 0) (b 1) (c 98) (d 9))
  54       (and (check a b 0 1)
  55            (check c d 10 9)
  56            (parameterize ((c (a)) (d (b)))
  57              (and (check a b 0 1)
  58                   (check c d 0 1))))))
  59
  60   (pass-if "SRFI-34"
  61     (let ((inside? (make-parameter #f)))
  62       (call/cc (lambda (return)
  63                  (with-exception-handler
  64                   (lambda (c)
  65                     ;; This handler should be called in the dynamic
  66                     ;; environment installed by `parameterize'.
  67                     (return (inside?)))
  68                   (lambda ()
  69                     (parameterize ((inside? #t))
  70                       (raise 'some-exception)))))))))
  71
  72 (let ()
  73   (define (test-ports param new-port new-port-2)
  74     (let ((old-port (param)))
  75
  76       (pass-if "new value"
  77         (parameterize ((param new-port))
  78           (eq? (param) new-port)))
  79
  80       (pass-if "set value"
  81         (parameterize ((param old-port))
  82           (param new-port)
  83           (eq? (param) new-port)))
  84
  85       (pass-if "old restored"
  86         (parameterize ((param new-port))
  87           #f)
  88         (eq? (param) old-port))
  89
  90       (pass-if "throw exit"
  91         (catch 'bail
  92           (lambda ()
  93             (parameterize ((param new-port))
  94               (throw 'bail)))
  95           (lambda args #f))
  96         (eq? (param) old-port))
  97
  98       (pass-if "call/cc re-enter"
  99         (let ((cont  #f)
 100               (count 0)
 101               (port  #f)
 102               (good  #t))
 103           (parameterize ((param new-port))
 104             (call/cc (lambda (k) (set! cont k)))
 105             (set! count (1+ count))
 106             (set! port (param))
 107             (if (= 1 count) (param new-port-2)))
 108           (set! good (and good (eq? (param) old-port)))
 109           (case count
 110             ((1)
 111              (set! good (and good (eq? port new-port)))
 112              ;; re-entering should give new-port-2 left there last time
 113              (cont))
 114             ((2)
 115              (set! good (and good (eq? port new-port-2)))))
 116           good))
 117
 118       (pass-if "original unchanged"
 119         (eq? (param) old-port))))
 120
 121   (with-test-prefix "current-input-port"
 122     (test-ports current-input-port
 123                 (open-input-string "xyz") (open-input-string "xyz")))
 124
 125   (with-test-prefix "current-output-port"
 126     (test-ports current-output-port
 127                 (open-output-string) (open-output-string)))
 128
 129   (with-test-prefix "current-error-port"
 130     (test-ports current-error-port
 131                 (open-output-string) (open-output-string))))