unofficial mirror of emacs-devel@gnu.org 
 help / color / mirror / code / Atom feed
blob 1ce402977f5361279bc2f916254e9405e93ecd77 9875 bytes (raw)
name: test/lisp/emacs-lisp/bindat-tests.el 	 # note: path name is non-authoritative(*)

  1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
 
;;; bindat-tests.el --- tests for bindat.el  -*- lexical-binding: t -*-

;; Copyright (C) 2019-2022 Free Software Foundation, Inc.

;; This file is part of GNU Emacs.

;; GNU Emacs is free software; you can redistribute it and/or modify
;; it under the terms of the GNU General Public License as published by
;; the Free Software Foundation, either version 3 of the License, or
;; (at your option) any later version.

;; GNU Emacs is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
;; GNU General Public License for more details.

;; You should have received a copy of the GNU General Public License
;; along with GNU Emacs.  If not, see <https://www.gnu.org/licenses/>.

;;; Code:

(require 'ert)
(require 'bindat)
(require 'cl-lib)

(bindat-defmacro ip () "An IPv4 address"     '(vec 4 byte))

(defconst header-bindat-spec
  (bindat-type
    (dest-ip ip)
    (src-ip ip)
    (dest-port uint 16)
    (src-port uint 16)))

(defconst data-bindat-spec
  (bindat-type
    (type u8)
    (opcode u8)
    (length uint 16 'le) ;; little endian order
    (id strz 8)
    (data vec length)
    (_ align 4)))


(defconst packet-bindat-spec
  (bindat-type
    (header type header-bindat-spec)
    (items u8)
    (_ fill 3)
    (item repeat items
          (_ type data-bindat-spec))))

(defconst struct-bindat
  '((header
     (dest-ip . [192 168 1 100])
     (src-ip . [192 168 1 101])
     (dest-port . 284)
     (src-port . 5408))
    (items . 2)
    (item ((type . 2)
           (opcode . 3)
           (length . 5)
           (id . "ABCDEF")
           (data . [1 2 3 4 5]))
          ((type . 1)
           (opcode . 4)
           (length . 7)
           (id . "BCDEFG")
           (data . [6 7 8 9 10 11 12])))))

(ert-deftest bindat-test-pack ()
  (should (equal
           (cl-map 'vector #'identity
                   (bindat-pack packet-bindat-spec struct-bindat))
           [ 192 168 1 100 192 168 1 101 01 28 21 32 2 0 0 0
                 2 3 5 0 ?A ?B ?C ?D ?E ?F 0 0 1 2 3 4 5 0 0 0
                 1 4 7 0 ?B ?C ?D ?E ?F ?G 0 0 6 7 8 9 10 11 12 0 ])))

(ert-deftest bindat-test-unpack ()
  (should (equal
           (bindat-unpack packet-bindat-spec
                          (bindat-pack packet-bindat-spec struct-bindat))
           struct-bindat)))

(ert-deftest bindat-test-pack/multibyte-string-fails ()
  (should-error (bindat-pack nil nil "ö")))

(ert-deftest bindat-test-unpack/multibyte-string-fails ()
  (should-error (bindat-unpack nil "ö")))

(ert-deftest bindat-test-format-vector ()
  (should (equal (bindat-format-vector [1 2 3] "%d" "x" 2) "1x2"))
  (should (equal (bindat-format-vector [1 2 3] "%d" "x") "1x2x3")))

(ert-deftest bindat-test-vector-to-dec ()
  (should (equal (bindat-vector-to-dec [1 2 3]) "1.2.3"))
  (should (equal (bindat-vector-to-dec [2048 1024 512] ".") "2048.1024.512")))

(ert-deftest bindat-test-vector-to-hex ()
  (should (equal (bindat-vector-to-hex [1 2 3]) "01:02:03"))
  (should (equal (bindat-vector-to-hex [2048 1024 512] ".") "800.400.200")))

(ert-deftest bindat-test-ip-to-string ()
  (should (equal (bindat-ip-to-string [192 168 0 1]) "192.168.0.1"))
  (should (equal (bindat-ip-to-string "\300\250\0\1") "192.168.0.1")))

(defconst bindat-test--int-websocket-type
  (bindat-type
    :pack-var value
    (n1 u8
        :pack-val (if (< value 126) value (if (< value 65536) 126 127)))
    (n2 uint (pcase n1 (127 64) (126 16) (_ 0))
        :pack-val value)
    :unpack-val (if (< n1 126) n1 n2)))

(ert-deftest bindat-test--pack-val ()
  ;; This is intended to test the :(un)pack-val feature that offers
  ;; control over the unpacked representation of the data.
  (dolist (n '(0 42 125 126 127 128 150 255 5000 65535 65536 8769786876))
    (should
     (equal (bindat-unpack bindat-test--int-websocket-type
                           (bindat-pack bindat-test--int-websocket-type n))
            n))))

(ert-deftest bindat-test--sint ()
  (dotimes (kind 32)
    (let ((bitlen (* 8 (/ kind 2)))
          (r (zerop (% kind 2))))
      (dotimes (_ 100)
        (let* ((n (random (ash 1 bitlen)))
               (i (- n (ash 1 (1- bitlen))))
               (stype (bindat-type sint bitlen r))
               (utype (bindat-type if r (uintr bitlen) (uint bitlen))))
          (should (equal (bindat-unpack
                          stype
                          (bindat-pack stype i))
                         i))
          (when (>= i 0)
            (should (equal (bindat-pack utype i)
                           (bindat-pack stype i)))
            (should (equal (bindat-unpack utype (bindat-pack stype i))
                           i))))))))

(defconst bindat-test--LEB128
  (bindat-type
   letrec ((loop
            (struct :pack-var n
                    (head u8
                          :pack-val (+ (logand n 127) (if (> n 127) 128 0)))
                    (tail if (< head 128) (unit 0) loop
                          :pack-val (ash n -7))
                    :unpack-val (+ (logand head 127) (ash tail 7)))))
   loop))

(ert-deftest bindat-test--recursive ()
  (dotimes (n 10)
    (let ((max (ash 1 (* n 10))))
      (dotimes (_ 10)
        (let ((n (random max)))
          (should (equal (bindat-unpack bindat-test--LEB128
                                        (bindat-pack bindat-test--LEB128 n))
                         n)))))))

(ert-deftest bindat-test--str-strz-prealloc ()
  (dolist (tc `(((,(bindat-type str 1) "") . "xx")
                ((,(bindat-type str 2) "") . "xx")
                ((,(bindat-type str 2) "a") . "ax")
                ((,(bindat-type str 2) "ab") . "ab")
                ((,(bindat-type str 2) "abc") . "ab")
                ((((x str 1)) ((x . ""))) . "xx")
                ((((x str 2)) ((x . ""))) . "xx")
                ((((x str 2)) ((x . "a"))) . "ax")
                ((((x str 2)) ((x . "ab"))) . "ab")
                ((((x str 2)) ((x . "abc"))) . "ab")
                ((,(bindat-type strz 1) "") . "xx")
                ((,(bindat-type strz 2) "") . "xx")
                ((,(bindat-type strz 2) "a") . "ax")
                ((,(bindat-type strz 2) "ab") . "ab")
                ((,(bindat-type strz 2) "abc") . "ab")
                ((((x strz 1)) ((x . ""))) . "xx")
                ((((x strz 2)) ((x . ""))) . "xx")
                ((((x strz 2)) ((x . "a"))) . "ax")
                ((((x strz 2)) ((x . "ab"))) . "ab")
                ((((x strz 2)) ((x . "abc"))) . "ab")
                ((,(bindat-type strz) "") . "xx")
                ((,(bindat-type strz) "a") . "ax")))
    (let ((prealloc (make-string 2 ?x)))
      (apply #'bindat-pack (append (car tc) (list prealloc)))
      (should (equal prealloc (cdr tc))))))

(let ((spec (bindat-type strz 2)))
  (ert-deftest bindat-test--strz-fixedlen-len ()
    (should (equal (bindat-length spec "") 2))
    (should (equal (bindat-length spec "a") 2)))

  (ert-deftest bindat-test--strz-fixedlen-len-overflow ()
    (should (equal (bindat-length spec "ab") 2))
    (should (equal (bindat-length spec "abc") 2)))

  (ert-deftest bindat-test--strz-fixedlen-pack ()
    (should (equal (bindat-pack spec "") "\0\0"))
    (should (equal (bindat-pack spec "a") "a\0")))

  (ert-deftest bindat-test--strz-fixedlen-pack-overflow ()
    ;; This is not the only valid semantic, but it's the one we've
    ;; offered historically.
    (should (equal (bindat-pack spec "ab") "ab"))
    (should (equal (bindat-pack spec "abc") "ab")))

  (ert-deftest bindat-test--strz-fixedlen-unpack ()
    (should (equal (bindat-unpack spec "\0\0") ""))
    (should (equal (bindat-unpack spec "\0X") ""))
    (should (equal (bindat-unpack spec "a\0") "a"))
    ;; Same comment as for b-t-s-f-pack-overflow.
    (should (equal (bindat-unpack spec "ab") "ab"))
    ;; Missing null terminator.
    (should-error (bindat-unpack spec ""))
    (should-error (bindat-unpack spec "a"))))

(let ((spec (bindat-type strz)))
  (ert-deftest bindat-test--strz-varlen-len ()
    (should (equal (bindat-length spec "") 1))
    (should (equal (bindat-length spec "abc") 4)))

  (ert-deftest bindat-test--strz-varlen-pack ()
    (should (equal (bindat-pack spec "") "\0"))
    (should (equal (bindat-pack spec "abc") "abc\0")))

  (ert-deftest bindat-test--strz-varlen-unpack ()
    (should (equal (bindat-unpack spec "\0") ""))
    (should (equal (bindat-unpack spec "abc\0") "abc"))
    ;; Missing null terminator.
    (should-error (bindat-unpack spec ""))
    (should-error (bindat-unpack spec "a"))))

(let ((spec '((x strz 2))))
  (ert-deftest bindat-test--strz-legacy-fixedlen-len ()
    (should (equal (bindat-length spec '((x . ""))) 2))
    (should (equal (bindat-length spec '((x . "a"))) 2)))

  (ert-deftest bindat-test--strz-legacy-fixedlen-len-overflow ()
    (should (equal (bindat-length spec '((x . "ab"))) 2))
    (should (equal (bindat-length spec '((x . "abc"))) 2)))

  (ert-deftest bindat-test--strz-legacy-fixedlen-pack ()
    (should (equal (bindat-pack spec '((x . ""))) "\0\0"))
    (should (equal (bindat-pack spec '((x . "a"))) "a\0")))

  (ert-deftest bindat-test--strz-legacy-fixedlen-pack-overflow ()
    ;; Same comment as for b-t-s-f-pack-overflow.
    (should (equal (bindat-pack spec '((x . "ab"))) "ab"))
    (should (equal (bindat-pack spec '((x . "abc"))) "ab")))

  (ert-deftest bindat-test--strz-legacy-fixedlen-unpack ()
    (should (equal (bindat-unpack spec "\0\0") '((x . ""))))
    (should (equal (bindat-unpack spec "\0X") '((x . ""))))
    (should (equal (bindat-unpack spec "a\0") '((x . "a"))))
    ;; Same comment as for b-t-s-f-pack-overflow.
    (should (equal (bindat-unpack spec "ab") '((x . "ab"))))
    ;; Missing null terminator.
    (should-error (bindat-unpack spec ""))
    (should-error (bindat-unpack spec "a"))))

;;; bindat-tests.el ends here

debug log:

solving 1ce402977f5 ...
found 1ce402977f5 in https://git.savannah.gnu.org/cgit/emacs.git

(*) Git path names are given by the tree(s) the blob belongs to.
    Blobs themselves have no identifier aside from the hash of its contents.^

Code repositories for project(s) associated with this public inbox

	https://git.savannah.gnu.org/cgit/emacs.git

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).