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+;;; GNU Guix --- Functional package management for GNU
+;;; Copyright © 2018 Ludovic Courtès <ludo@gnu.org>
+;;;
+;;; 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-store-deduplication)
+ #:use-module (guix tests)
+ #:use-module (guix store deduplication)
+ #:use-module (guix hash)
+ #:use-module ((guix utils) #:select (call-with-temporary-directory))
+ #:use-module (guix build utils)
+ #:use-module (rnrs bytevectors)
+ #:use-module (ice-9 binary-ports)
+ #:use-module (srfi srfi-1)
+ #:use-module (srfi srfi-64))
+
+(test-begin "store-deduplication")
+
+(test-equal "deduplicate"
+ (cons* #t #f ;inode comparisons
+ 2 (make-list 5 6)) ;'nlink' values
+
+ (call-with-temporary-directory
+ (lambda (store)
+ (let ((data (string->utf8 "Hello, world!"))
+ (identical (map (lambda (n)
+ (string-append store "/" (number->string n)))
+ (iota 5)))
+ (unique (string-append store "/unique")))
+ (for-each (lambda (file)
+ (call-with-output-file file
+ (lambda (port)
+ (put-bytevector port data))))
+ identical)
+ (call-with-output-file unique
+ (lambda (port)
+ (put-bytevector port (string->utf8 "This is unique."))))
+
+ (for-each (lambda (file)
+ (deduplicate file (sha256 data) #:store store))
+ identical)
+ (deduplicate unique (nar-sha256 unique) #:store store)
+
+ ;; (system (string-append "ls -lRia " store))
+ (cons* (apply = (map (compose stat:ino stat) identical))
+ (= (stat:ino (stat unique))
+ (stat:ino (stat (car identical))))
+ (stat:nlink (stat unique))
+ (map (compose stat:nlink stat) identical))))))
+
+(test-end "store-deduplication")