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3597c0396b
* guix/lzlib.scm (%compression-levels): Splice the rest of each element.
(dictionary-size+match-length-limit): New procedure.
(make-lzip-output-port, make-lzip-input-port/compressed): Use it.
* tests/lzlib.scm ("Bytevector of size relative to Lzip internal buffers (2 * dictionary)"):
Use 'dictionary-size+match-length-limit' instead of 'assoc-ref'.
120 lines
4.6 KiB
Scheme
120 lines
4.6 KiB
Scheme
;;; GNU Guix --- Functional package management for GNU
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;;; Copyright © 2019 Pierre Neidhardt <mail@ambrevar.xyz>
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;;;
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;;; This file is part of GNU Guix.
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;;;
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;;; GNU Guix is free software; you can redistribute it and/or modify it
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;;; under the terms of the GNU General Public License as published by
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;;; the Free Software Foundation; either version 3 of the License, or (at
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;;; your option) any later version.
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;;;
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;;; GNU Guix is distributed in the hope that it will be useful, but
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;;; 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 GNU Guix. If not, see <http://www.gnu.org/licenses/>.
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(define-module (test-lzlib)
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#:use-module (guix lzlib)
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#:use-module (guix tests)
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#:use-module (srfi srfi-64)
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#:use-module (rnrs bytevectors)
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#:use-module (rnrs io ports)
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#:use-module (ice-9 match))
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;; Test the (guix lzlib) module.
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(define-syntax-rule (test-assert* description exp)
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(begin
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(unless (lzlib-available?)
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(test-skip 1))
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(test-assert description exp)))
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(test-begin "lzlib")
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(define (compress-and-decompress data)
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"DATA must be a bytevector."
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(pk "Uncompressed bytes:" (bytevector-length data))
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(match (pipe)
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((parent . child)
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(match (primitive-fork)
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(0 ;compress
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(dynamic-wind
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(const #t)
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(lambda ()
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(close-port parent)
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(call-with-lzip-output-port child
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(lambda (port)
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(put-bytevector port data))))
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(lambda ()
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(primitive-exit 0))))
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(pid ;decompress
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(begin
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(close-port child)
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(let ((received (call-with-lzip-input-port parent
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(lambda (port)
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(get-bytevector-all port)))))
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(match (waitpid pid)
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((_ . status)
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(pk "Status" status)
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(pk "Length data" (bytevector-length data) "received" (bytevector-length received))
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;; The following loop is a debug helper.
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(let loop ((i 0))
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(if (and (< i (bytevector-length received))
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(= (bytevector-u8-ref received i)
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(bytevector-u8-ref data i)))
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(loop (+ 1 i))
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(pk "First diff at index" i)))
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(and (zero? status)
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(port-closed? parent)
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(bytevector=? received data)))))))))))
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(test-assert* "null bytevector"
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(compress-and-decompress (make-bytevector (+ (random 100000)
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(* 20 1024)))))
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(test-assert* "random bytevector"
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(compress-and-decompress (random-bytevector (+ (random 100000)
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(* 20 1024)))))
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(test-assert* "small bytevector"
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(compress-and-decompress (random-bytevector 127)))
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(test-assert* "1 bytevector"
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(compress-and-decompress (random-bytevector 1)))
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(test-assert* "Bytevector of size relative to Lzip internal buffers (2 * dictionary)"
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(compress-and-decompress
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(random-bytevector
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(* 2 (dictionary-size+match-length-limit %default-compression-level)))))
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(test-assert* "Bytevector of size relative to Lzip internal buffers (64KiB)"
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(compress-and-decompress (random-bytevector (* 64 1024))))
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(test-assert* "Bytevector of size relative to Lzip internal buffers (64KiB-1)"
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(compress-and-decompress (random-bytevector (1- (* 64 1024)))))
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(test-assert* "Bytevector of size relative to Lzip internal buffers (64KiB+1)"
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(compress-and-decompress (random-bytevector (1+ (* 64 1024)))))
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(test-assert* "Bytevector of size relative to Lzip internal buffers (1MiB)"
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(compress-and-decompress (random-bytevector (* 1024 1024))))
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(test-assert* "Bytevector of size relative to Lzip internal buffers (1MiB-1)"
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(compress-and-decompress (random-bytevector (1- (* 1024 1024)))))
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(test-assert* "Bytevector of size relative to Lzip internal buffers (1MiB+1)"
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(compress-and-decompress (random-bytevector (1+ (* 1024 1024)))))
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(test-assert* "make-lzip-input-port/compressed"
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(let* ((len (pk 'len (+ 10 (random 4000 %seed))))
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(data (random-bytevector len))
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(compressed (make-lzip-input-port/compressed
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(open-bytevector-input-port data)))
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(result (call-with-lzip-input-port compressed
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get-bytevector-all)))
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(pk (bytevector-length result) (bytevector-length data))
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(bytevector=? result data)))
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(test-end)
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