tests/stream.impure.lisp

   1 ;;;; tests related to Lisp streams
   2
   3 ;;;; This software is part of the SBCL system. See the README file for
   4 ;;;; more information.
   5 ;;;;
   6 ;;;; While most of SBCL is derived from the CMU CL system, the test
   7 ;;;; files (like this one) were written from scratch after the fork
   8 ;;;; from CMU CL.
   9 ;;;;
  10 ;;;; This software is in the public domain and is provided with
  11 ;;;; absolutely no warranty. See the COPYING and CREDITS files for
  12 ;;;; more information.
  13
  14 (load "assertoid.lisp")
  15 (use-package "ASSERTOID")
  16
  17 ;;; type errors for inappropriate stream arguments, fixed in
  18 ;;; sbcl-0.7.8.19
  19 (locally
  20     (declare (optimize (safety 3)))
  21   (assert (raises-error? (make-two-way-stream (make-string-output-stream)
  22                                               (make-string-output-stream))
  23                          type-error))
  24   (assert (raises-error? (make-two-way-stream (make-string-input-stream "foo")
  25                                               (make-string-input-stream "bar"))
  26                          type-error))
  27   ;; the following two aren't actually guaranteed, because ANSI, as it
  28   ;; happens, doesn't say "should signal an error" for
  29   ;; MAKE-ECHO-STREAM. It's still good to have, but if future
  30   ;; maintenance work causes this test to fail because of these
  31   ;; MAKE-ECHO-STREAM clauses, consider simply removing these clauses
  32   ;; from the test. -- CSR, 2002-10-06
  33   (assert (raises-error? (make-echo-stream (make-string-output-stream)
  34                                            (make-string-output-stream))
  35                          type-error))
  36   (assert (raises-error? (make-echo-stream (make-string-input-stream "foo")
  37                                            (make-string-input-stream "bar"))
  38                          type-error))
  39   (assert (raises-error? (make-concatenated-stream
  40                           (make-string-output-stream)
  41                           (make-string-input-stream "foo"))
  42                          type-error)))
  43
  44 ;;; bug 225: STRING-STREAM was not a class
  45 (eval `(defgeneric bug225 (s)
  46          ,@(mapcar (lambda (class)
  47                      `(:method :around ((s ,class)) (cons ',class (call-next-method))))
  48                    '(stream string-stream sb-impl::string-input-stream
  49                      sb-impl::string-output-stream))
  50          (:method (class) nil)))
  51
  52 (assert (equal (bug225 (make-string-input-stream "hello"))
  53                '(sb-impl::string-input-stream string-stream stream)))
  54 (assert (equal (bug225 (make-string-output-stream))
  55                '(sb-impl::string-output-stream string-stream stream)))
  56
  57 \f
  58 ;;; improper buffering on (SIGNED-BYTE 8) streams (fixed by David Lichteblau):
  59 (let ((p "signed-byte-8-test.data"))
  60   (with-open-file (s p
  61                      :direction :output
  62                      :element-type '(unsigned-byte 8)
  63                      :if-exists :supersede)
  64     (write-byte 255 s))
  65   (with-open-file (s p :element-type '(signed-byte 8))
  66     (assert (= (read-byte s) -1)))
  67   (delete-file p))
  68 \f
  69 ;;; :IF-EXISTS got :ERROR and NIL the wrong way round (reported by
  70 ;;; Milan Zamazal)
  71 (let* ((p "this-file-will-exist")
  72        (stream (open p :direction :output :if-exists :error)))
  73   (assert (null (with-open-file (s p :direction :output :if-exists nil) s)))
  74   (assert (raises-error?
  75            (with-open-file (s p :direction :output :if-exists :error))))
  76   (close stream)
  77   (delete-file p))
  78 \f
  79 (assert (raises-error? (read-byte (make-string-input-stream "abc"))
  80                        type-error))
  81 (assert (raises-error? (with-open-file (s "/dev/zero")
  82                          (read-byte s))
  83                        type-error))
  84 ;;; bidirectional streams getting confused about their position
  85 (let ((p "bidirectional-stream-test"))
  86   (with-open-file (s p :direction :output :if-exists :supersede)
  87     (with-standard-io-syntax
  88       (format s "~S ~S ~S~%" 'these 'are 'symbols)))
  89   (with-open-file (s p :direction :io :if-exists :overwrite)
  90     (read s)
  91     (with-standard-io-syntax
  92       (prin1 'insert s)))
  93   (with-open-file (s p)
  94     (assert (string= (read-line s) "THESE INSERTMBOLS")))
  95   (delete-file p))
  96 \f
  97 ;;; :DIRECTION :IO didn't work on non-existent pathnames
  98 (let ((p "direction-io-test"))
  99   (ignore-errors (delete-file p))
 100   (with-open-file (s p :direction :io)
 101     (format s "1")
 102     (finish-output s)
 103     (file-position s :start)
 104     (assert (char= (read-char s) #\1)))
 105   (delete-file p))
 106 \f
 107 ;;; FILE-POSITION on broadcast-streams is mostly uncontroversial
 108 (assert (= 0 (file-position (make-broadcast-stream))))
 109 (assert (file-position (make-broadcast-stream) :start))
 110 (assert (file-position (make-broadcast-stream) 0))
 111 (assert (not (file-position (make-broadcast-stream) 1)))
 112 (let ((s (make-broadcast-stream)))
 113   (write-char #\a s)
 114   (assert (not (file-position s 1)))
 115   (assert (= 0 (file-position s))))
 116
 117 (let ((p "broadcast-stream-test"))
 118   (ignore-errors (delete-file p))
 119   (with-open-file (f p :direction :output)
 120     (let ((s (make-broadcast-stream f)))
 121       (assert (= 0 (file-position s)))
 122       (assert (file-position s :start))
 123       (assert (file-position s 0))
 124       (write-char #\a s)
 125       (assert (= 1 (file-position s))) ; unicode...
 126       (assert (file-position s 0))))
 127   (delete-file p))
 128
 129 ;;; CLOSING a non-new streams should not delete them, and superseded
 130 ;;; files should be restored.
 131 (let ((test "test-file-for-close-should-not-delete"))
 132   (macrolet ((test-mode (mode)
 133                `(progn
 134                  (catch :close-test-exit
 135                    (with-open-file (f test :direction :output :if-exists ,mode)
 136                      (write-line "test" f)
 137                      (throw :close-test-exit t)))
 138                  (assert (and (probe-file test) ,mode)))))
 139     (unwind-protect
 140          (progn
 141            (with-open-file (f test :direction :output)
 142              (write-line "test" f))
 143            (test-mode :append)
 144            (test-mode :overwrite)
 145            ;; FIXME: We really should recover supersede files as well, according to
 146            ;; CLOSE in CLHS, but at the moment we don't.
 147            ;; (test-mode :supersede)
 148            (test-mode :rename)
 149            (test-mode :rename-and-delete))
 150       (when (probe-file test)
 151         (delete-file test)))))
 152
 153 ;;; test for read-write invariance of signed bytes, from Bruno Haible
 154 ;;; cmucl-imp 2004-09-06
 155 (defun bin-stream-test (&key (size (integer-length most-positive-fixnum))
 156                         (type 'unsigned-byte) (file-name "stream-impure.tmp")
 157                         (num-bytes 10)
 158                         (bytes (if (eq type 'signed-byte)
 159                                    (loop :repeat num-bytes :collect
 160                                          (- (random (ash 1 size))
 161                                             (ash 1 (1- size))))
 162                                    (loop :repeat num-bytes :collect
 163                                          (random (ash 1 size))))))
 164   (with-open-file (foo file-name :direction :output :if-exists :supersede
 165                        :element-type (list type size))
 166     (dolist (byte bytes)
 167       (write-byte byte foo)))
 168   (unwind-protect
 169        (with-open-file (foo file-name :direction :input
 170                             :element-type (list type size))
 171          (list (stream-element-type foo) (file-length foo) bytes
 172                (loop :for byte :in bytes :for nb = (read-byte foo) :collect nb
 173                      :unless (= nb byte) :do
 174                      (flet ((by-out (sz by)
 175                               (format nil "~v,'0,' ,4:b"
 176                                       (+ sz (floor sz 4)) by)))
 177                        (error "~& * [(~s ~s)] ~a != ~a~%" type size
 178                               (by-out size byte) (by-out size nb))))))
 179     (delete-file file-name)))
 180 (loop for size from 2 to 40 do (bin-stream-test :size size :type 'signed-byte))
 181
 182 ;;; success