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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)