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;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2019 Pierre Neidhardt <mail@ambrevar.xyz>
;;;
;;; This file is part of GNU Guix.
;;;
;;; GNU Guix 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 Guix 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 Guix. If not, see <http://www.gnu.org/licenses/>.
(define-module (test-lzlib)
#:use-module (guix lzlib)
#:use-module (guix tests)
#:use-module (srfi srfi-64)
#:use-module (rnrs bytevectors)
#:use-module (rnrs io ports)
#:use-module (ice-9 match))
;; Test the (guix lzlib) module.
(define-syntax-rule (test-assert* description exp)
(begin
(unless (lzlib-available?)
(test-skip 1))
(test-assert description exp)))
(test-begin "lzlib")
(define (compress-and-decompress data)
"DATA must be a bytevector."
(pk "Uncompressed bytes:" (bytevector-length data))
(match (pipe)
((parent . child)
(match (primitive-fork)
(0 ;compress
(dynamic-wind
(const #t)
(lambda ()
(close-port parent)
(call-with-lzip-output-port child
(lambda (port)
(put-bytevector port data))))
(lambda ()
(primitive-exit 0))))
(pid ;decompress
(begin
(close-port child)
(let ((received (call-with-lzip-input-port parent
(lambda (port)
(get-bytevector-all port)))))
(match (waitpid pid)
((_ . status)
(pk "Status" status)
(pk "Length data" (bytevector-length data) "received" (bytevector-length received))
;; The following loop is a debug helper.
(let loop ((i 0))
(if (and (< i (bytevector-length received))
(= (bytevector-u8-ref received i)
(bytevector-u8-ref data i)))
(loop (+ 1 i))
(pk "First diff at index" i)))
(and (zero? status)
(port-closed? parent)
(bytevector=? received data)))))))))))
(test-assert* "null bytevector"
(compress-and-decompress (make-bytevector (+ (random 100000)
(* 20 1024)))))
(test-assert* "random bytevector"
(compress-and-decompress (random-bytevector (+ (random 100000)
(* 20 1024)))))
(test-assert* "small bytevector"
(compress-and-decompress (random-bytevector 127)))
(test-assert* "1 bytevector"
(compress-and-decompress (random-bytevector 1)))
(test-assert* "Bytevector of size relative to Lzip internal buffers (2 * dictionary)"
(compress-and-decompress
(random-bytevector
(* 2 (car (car (assoc-ref (@@ (guix lzlib) %compression-levels)
(@@ (guix lzlib) %default-compression-level))))))))
(test-assert* "Bytevector of size relative to Lzip internal buffers (64KiB)"
(compress-and-decompress (random-bytevector (* 64 1024))))
(test-assert* "Bytevector of size relative to Lzip internal buffers (64KiB-1)"
(compress-and-decompress (random-bytevector (1- (* 64 1024)))))
(test-assert* "Bytevector of size relative to Lzip internal buffers (64KiB+1)"
(compress-and-decompress (random-bytevector (1+ (* 64 1024)))))
(test-assert* "Bytevector of size relative to Lzip internal buffers (1MiB)"
(compress-and-decompress (random-bytevector (* 1024 1024))))
(test-assert* "Bytevector of size relative to Lzip internal buffers (1MiB-1)"
(compress-and-decompress (random-bytevector (1- (* 1024 1024)))))
(test-assert* "Bytevector of size relative to Lzip internal buffers (1MiB+1)"
(compress-and-decompress (random-bytevector (1+ (* 1024 1024)))))
(test-end)
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