[jackhill/guix/guix.git] / tests / utils.scm

;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2012, 2013, 2014, 2015, 2016 Ludovic Courtès <ludo@gnu.org>
;;; Copyright © 2014 Eric Bavier <bavier@member.fsf.org>
;;; Copyright © 2016 Mathieu Lirzin <mthl@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-utils)
  #:use-module ((guix config) #:select (%gzip))
  #:use-module (guix utils)
  #:use-module ((guix store) #:select (%store-prefix store-path-package-name))
  #:use-module ((guix search-paths) #:select (string-tokenize*))
  #:use-module (srfi srfi-1)
  #:use-module (srfi srfi-11)
  #:use-module (srfi srfi-64)
  #:use-module (rnrs bytevectors)
  #:use-module (rnrs io ports)
  #:use-module (ice-9 match)
  #:use-module (ice-9 vlist))

(define temp-file
  (string-append "t-utils-" (number->string (getpid))))

(test-begin "utils")

(test-assert "bytevector->base16-string->bytevector"
  (every (lambda (bv)
           (equal? (base16-string->bytevector
                    (bytevector->base16-string bv))
                   bv))
         (map string->utf8 '("" "f" "fo" "foo" "foob" "fooba" "foobar"))))

(test-assert "gnu-triplet->nix-system"
  (let ((samples '(("i586-gnu0.3" "i686-gnu")
                   ("x86_64-unknown-linux-gnu" "x86_64-linux")
                   ("i386-pc-linux-gnu" "i686-linux")
                   ("x86_64-unknown-freebsd8.2" "x86_64-freebsd")
                   ("x86_64-apple-darwin10.8.0" "x86_64-darwin")
                   ("i686-pc-cygwin" "i686-cygwin"))))
    (let-values (((gnu nix) (unzip2 samples)))
      (every (lambda (gnu nix)
               (equal? nix (gnu-triplet->nix-system gnu)))
             gnu nix))))

(test-assert "package-name->name+version"
  (every (match-lambda
          ((name version)
           (let*-values (((full-name)
                          (if version
                              (string-append name "@" version)
                              name))
                         ((name* version*)
                          (package-name->name+version full-name)))
             (and (equal? name* name)
                  (equal? version* version)))))
         '(("foo" "0.9.1b")
           ("foo-14-bar" "320")
           ("foo-bar2" #f)
           ("guile" "2.0.6.65-134c9") ; as produced by `git-version-gen'
           ("nixpkgs" "1.0pre22125_a28fe19")
           ("gtk2" "2.38.0"))))

(test-assert "guile-version>? 1.8"
  (guile-version>? "1.8"))

(test-assert "guile-version>? 10.5"
  (not (guile-version>? "10.5")))

(test-equal "string-tokenize*"
  '(("foo")
    ("foo" "bar" "baz")
    ("foo" "bar" "")
    ("foo" "bar" "baz"))
  (list (string-tokenize* "foo" ":")
        (string-tokenize* "foo;bar;baz" ";")
        (string-tokenize* "foo!bar!" "!")
        (string-tokenize* "foo+-+bar+-+baz" "+-+")))

(test-equal "string-replace-substring"
  '("foo BAR! baz"
    "/gnu/store/chbouib"
    "")
  (list (string-replace-substring "foo bar baz" "bar" "BAR!")
        (string-replace-substring "/nix/store/chbouib" "/nix/" "/gnu/")
        (string-replace-substring "" "foo" "bar")))

(test-equal "fold2, 1 list"
    (list (reverse (iota 5))
          (map - (reverse (iota 5))))
  (call-with-values
      (lambda ()
        (fold2 (lambda (i r1 r2)
                 (values (cons i r1)
                         (cons (- i) r2)))
               '() '()
               (iota 5)))
    list))

(test-equal "fold2, 2 lists"
    (list (reverse '((a . 0) (b . 1) (c . 2) (d . 3)))
          (reverse '((a . 0) (b . -1) (c . -2) (d . -3))))
  (call-with-values
      (lambda ()
        (fold2 (lambda (k v r1 r2)
                 (values (alist-cons k v r1)
                         (alist-cons k (- v) r2)))
               '() '()
               '(a b c d)
               '(0 1 2 3)))
    list))

(test-equal "split, element is in list"
  '((foo) (baz))
  (call-with-values
      (lambda ()
        (split '(foo bar baz) 'bar))
    list))

(test-equal "split, element is not in list"
  '((foo bar baz) ())
  (call-with-values
      (lambda ()
        (split '(foo bar baz) 'quux))
    list))

(test-equal "strip-keyword-arguments"
  '(a #:b b #:c c)
  (strip-keyword-arguments '(#:foo #:bar #:baz)
                           '(a #:foo 42 #:b b #:baz 3
                               #:c c #:bar 4)))

(test-equal "ensure-keyword-arguments"
  '((#:foo 2)
    (#:foo 2 #:bar 3)
    (#:foo 42 #:bar 3))
  (list (ensure-keyword-arguments '(#:foo 2) '(#:foo 2))
        (ensure-keyword-arguments '(#:foo 2) '(#:bar 3))
        (ensure-keyword-arguments '(#:foo 2) '(#:bar 3 #:foo 42))))

(let* ((tree (alist->vhash
              '((0 2 3) (1 3 4) (2) (3 5 6) (4 6) (5) (6))
              hashq))
       (add-one (lambda (_ r) (1+ r)))
       (tree-lookup (lambda (n) (cdr (vhash-assq n tree)))))
  (test-equal "fold-tree, single root"
    5 (fold-tree add-one 0 tree-lookup '(0)))
  (test-equal "fold-tree, two roots"
    7 (fold-tree add-one 0 tree-lookup '(0 1)))
  (test-equal "fold-tree, sum"
    16 (fold-tree + 0 tree-lookup '(0)))
  (test-equal "fold-tree, internal"
    18 (fold-tree + 0 tree-lookup '(3 4)))
  (test-equal "fold-tree, cons"
    '(1 3 4 5 6)
    (sort (fold-tree cons '() tree-lookup '(1)) <))
  (test-equal "fold-tree, overlapping paths"
    '(1 3 4 5 6)
    (sort (fold-tree cons '() tree-lookup '(1 4)) <))
  (test-equal "fold-tree, cons, two roots"
    '(0 2 3 4 5 6)
    (sort (fold-tree cons '() tree-lookup '(0 4)) <))
  (test-equal "fold-tree-leaves, single root"
    2 (fold-tree-leaves add-one 0 tree-lookup '(1)))
  (test-equal "fold-tree-leaves, single root, sum"
    11 (fold-tree-leaves + 0 tree-lookup '(1)))
  (test-equal "fold-tree-leaves, two roots"
    3 (fold-tree-leaves add-one 0 tree-lookup '(0 1)))
  (test-equal "fold-tree-leaves, two roots, sum"
    13 (fold-tree-leaves + 0 tree-lookup '(0 1))))

(test-assert "filtered-port, file"
  (let* ((file  (search-path %load-path "guix.scm"))
         (input (open-file file "r0b")))
    (let*-values (((compressed pids1)
                   (filtered-port `(,%gzip "-c" "--fast") input))
                  ((decompressed pids2)
                   (filtered-port `(,%gzip "-d") compressed)))
      (and (every (compose zero? cdr waitpid)
                  (append pids1 pids2))
           (equal? (get-bytevector-all decompressed)
                   (call-with-input-file file get-bytevector-all))))))

(test-assert "filtered-port, non-file"
  (let ((data (call-with-input-file (search-path %load-path "guix.scm")
                get-bytevector-all)))
    (let*-values (((compressed pids1)
                   (filtered-port `(,%gzip "-c" "--fast")
                                  (open-bytevector-input-port data)))
                  ((decompressed pids2)
                   (filtered-port `(,%gzip "-d") compressed)))
      (and (pk (every (compose zero? cdr waitpid)
                   (append pids1 pids2)))
           (equal? (get-bytevector-all decompressed) data)))))

(test-assert "filtered-port, does not exist"
  (let* ((file  (search-path %load-path "guix.scm"))
         (input (open-file file "r0b")))
    (let-values (((port pids)
                  (filtered-port '("/does/not/exist") input)))
      (any (compose (negate zero?) cdr waitpid)
           pids))))

(test-assert "compressed-port, decompressed-port, non-file"
  (let ((data (call-with-input-file (search-path %load-path "guix.scm")
                get-bytevector-all)))
    (let*-values (((compressed pids1)
                   (compressed-port 'xz (open-bytevector-input-port data)))
                  ((decompressed pids2)
                   (decompressed-port 'xz compressed)))
      (and (every (compose zero? cdr waitpid)
                  (append pids1 pids2))
           (equal? (get-bytevector-all decompressed) data)))))

(false-if-exception (delete-file temp-file))
(test-assert "compressed-output-port + decompressed-port"
  (let* ((file (search-path %load-path "guix/derivations.scm"))
         (data (call-with-input-file file get-bytevector-all))
         (port (open-file temp-file "w0b")))
    (call-with-compressed-output-port 'xz port
      (lambda (compressed)
        (put-bytevector compressed data)))
    (close-port port)

    (bytevector=? data
                  (call-with-decompressed-port 'xz (open-file temp-file "r0b")
                    get-bytevector-all))))

(false-if-exception (delete-file temp-file))
(test-equal "fcntl-flock wait"
  42                                              ; the child's exit status
  (let ((file (open-file temp-file "w0b")))
    ;; Acquire an exclusive lock.
    (fcntl-flock file 'write-lock)
    (match (primitive-fork)
      (0
       (dynamic-wind
         (const #t)
         (lambda ()
           ;; Reopen FILE read-only so we can have a read lock.
           (let ((file (open-file temp-file "r0b")))
             ;; Wait until we can acquire the lock.
             (fcntl-flock file 'read-lock)
             (primitive-exit (read file)))
           (primitive-exit 1))
         (lambda ()
           (primitive-exit 2))))
      (pid
       ;; Write garbage and wait.
       (display "hello, world!"  file)
       (force-output file)
       (sleep 1)

       ;; Write the real answer.
       (seek file 0 SEEK_SET)
       (truncate-file file 0)
       (write 42 file)
       (force-output file)

       ;; Unlock, which should let the child continue.
       (fcntl-flock file 'unlock)

       (match (waitpid pid)
         ((_  . status)
          (let ((result (status:exit-val status)))
            (close-port file)
            result)))))))

(test-equal "fcntl-flock non-blocking"
  EAGAIN                                          ; the child's exit status
  (match (pipe)
    ((input . output)
     (match (primitive-fork)
       (0
        (dynamic-wind
          (const #t)
          (lambda ()
            (close-port output)

            ;; Wait for the green light.
            (read-char input)

            ;; Open FILE read-only so we can have a read lock.
            (let ((file (open-file temp-file "w0")))
              (catch 'flock-error
                (lambda ()
                  ;; This attempt should throw EAGAIN.
                  (fcntl-flock file 'write-lock #:wait? #f))
                (lambda (key errno)
                  (primitive-exit (pk 'errno errno)))))
            (primitive-exit -1))
          (lambda ()
            (primitive-exit -2))))
       (pid
        (close-port input)
        (let ((file (open-file temp-file "w0")))
          ;; Acquire an exclusive lock.
          (fcntl-flock file 'write-lock)

          ;; Tell the child to continue.
          (write 'green-light output)
          (force-output output)

          (match (waitpid pid)
            ((_  . status)
             (let ((result (status:exit-val status)))
               (fcntl-flock file 'unlock)
               (close-port file)
               result)))))))))

;; This is actually in (guix store).
(test-equal "store-path-package-name"
  "bash-4.2-p24"
  (store-path-package-name
   (string-append (%store-prefix)
                  "/qvs2rj2ia5vci3wsdb7qvydrmacig4pg-bash-4.2-p24")))

(test-equal "canonical-newline-port"
  "This is a journey\nInto the sound\nA journey ...\n"
  (let ((port (open-string-input-port
               "This is a journey\r\nInto the sound\r\nA journey ...\n")))
    (get-string-all (canonical-newline-port port))))

(test-end)

(false-if-exception (delete-file temp-file))
Commit	Line	Data
233e7676	1	;;; GNU Guix --- Functional package management for GNU
6071122b	2	;;; Copyright © 2012, 2013, 2014, 2015, 2016 Ludovic Courtès <ludo@gnu.org>
516e3b6f	3	;;; Copyright © 2014 Eric Bavier <bavier@member.fsf.org>
1b846da8	4	;;; Copyright © 2016 Mathieu Lirzin <mthl@gnu.org>
e3deeebb	5	;;;
233e7676	6	;;; This file is part of GNU Guix.
e3deeebb	7	;;;
233e7676	8	;;; GNU Guix is free software; you can redistribute it and/or modify it
e3deeebb LC	9	;;; under the terms of the GNU General Public License as published by
	10	;;; the Free Software Foundation; either version 3 of the License, or (at
	11	;;; your option) any later version.
	12	;;;
233e7676	13	;;; GNU Guix is distributed in the hope that it will be useful, but
e3deeebb LC	14	;;; WITHOUT ANY WARRANTY; without even the implied warranty of
	15	;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	16	;;; GNU General Public License for more details.
	17	;;;
	18	;;; You should have received a copy of the GNU General Public License
233e7676	19	;;; along with GNU Guix. If not, see <http://www.gnu.org/licenses/>.
e3deeebb	20
e3deeebb	21	(define-module (test-utils)
e0fbbc88	22	#:use-module ((guix config) #:select (%gzip))
e3deeebb	23	#:use-module (guix utils)
b980f0f9	24	#:use-module ((guix store) #:select (%store-prefix store-path-package-name))
d838e702	25	#:use-module ((guix search-paths) #:select (string-tokenize*))
e3deeebb	26	#:use-module (srfi srfi-1)
98090557	27	#:use-module (srfi srfi-11)
e3deeebb	28	#:use-module (srfi srfi-64)
f9c7080a	29	#:use-module (rnrs bytevectors)
e0fbbc88	30	#:use-module (rnrs io ports)
516e3b6f EB	31	#:use-module (ice-9 match)
516e3b6f EB	32	#:use-module (ice-9 vlist))
e3deeebb	33
827d5563 LC	34	(define temp-file
	35	(string-append "t-utils-" (number->string (getpid))))
	36
e3deeebb LC	37	(test-begin "utils")
e3deeebb LC	38
6d800a80 LC	39	(test-assert "bytevector->base16-string->bytevector"
	40	(every (lambda (bv)
	41	(equal? (base16-string->bytevector
	42	(bytevector->base16-string bv))
	43	bv))
	44	(map string->utf8 '("" "f" "fo" "foo" "foob" "fooba" "foobar"))))
	45
98090557 LC	46	(test-assert "gnu-triplet->nix-system"
	47	(let ((samples '(("i586-gnu0.3" "i686-gnu")
	48	("x86_64-unknown-linux-gnu" "x86_64-linux")
	49	("i386-pc-linux-gnu" "i686-linux")
	50	("x86_64-unknown-freebsd8.2" "x86_64-freebsd")
	51	("x86_64-apple-darwin10.8.0" "x86_64-darwin")
	52	("i686-pc-cygwin" "i686-cygwin"))))
	53	(let-values (((gnu nix) (unzip2 samples)))
	54	(every (lambda (gnu nix)
	55	(equal? nix (gnu-triplet->nix-system gnu)))
	56	gnu nix))))
	57
9b48fb88 LC	58	(test-assert "package-name->name+version"
	59	(every (match-lambda
	60	((name version)
	61	(let*-values (((full-name)
	62	(if version
1b846da8	63	(string-append name "@" version)
9b48fb88 LC	64	name))
	65	((name* version*)
	66	(package-name->name+version full-name)))
	67	(and (equal? name* name)
	68	(equal? version* version)))))
	69	'(("foo" "0.9.1b")
1b846da8	70	("foo-14-bar" "320")
9b48fb88 LC	71	("foo-bar2" #f)
	72	("guile" "2.0.6.65-134c9") ; as produced by `git-version-gen'
	73	("nixpkgs" "1.0pre22125_a28fe19")
	74	("gtk2" "2.38.0"))))
	75
7db3ff4a LC	76	(test-assert "guile-version>? 1.8"
	77	(guile-version>? "1.8"))
	78
	79	(test-assert "guile-version>? 10.5"
	80	(not (guile-version>? "10.5")))
	81
2bcfb9e0 LC	82	(test-equal "string-tokenize*"
	83	'(("foo")
	84	("foo" "bar" "baz")
	85	("foo" "bar" "")
	86	("foo" "bar" "baz"))
d838e702 LC	87	(list (string-tokenize* "foo" ":")
	88	(string-tokenize* "foo;bar;baz" ";")
	89	(string-tokenize* "foo!bar!" "!")
	90	(string-tokenize* "foo+-+bar+-+baz" "+-+")))
2bcfb9e0	91
56b943de LC	92	(test-equal "string-replace-substring"
	93	'("foo BAR! baz"
	94	"/gnu/store/chbouib"
	95	"")
	96	(list (string-replace-substring "foo bar baz" "bar" "BAR!")
	97	(string-replace-substring "/nix/store/chbouib" "/nix/" "/gnu/")
	98	(string-replace-substring "" "foo" "bar")))
	99
04fd96ca LC	100	(test-equal "fold2, 1 list"
	101	(list (reverse (iota 5))
	102	(map - (reverse (iota 5))))
	103	(call-with-values
	104	(lambda ()
	105	(fold2 (lambda (i r1 r2)
	106	(values (cons i r1)
	107	(cons (- i) r2)))
	108	'() '()
	109	(iota 5)))
	110	list))
	111
	112	(test-equal "fold2, 2 lists"
	113	(list (reverse '((a . 0) (b . 1) (c . 2) (d . 3)))
	114	(reverse '((a . 0) (b . -1) (c . -2) (d . -3))))
	115	(call-with-values
	116	(lambda ()
	117	(fold2 (lambda (k v r1 r2)
	118	(values (alist-cons k v r1)
	119	(alist-cons k (- v) r2)))
	120	'() '()
	121	'(a b c d)
	122	'(0 1 2 3)))
	123	list))
	124
bbd00d20 DT	125	(test-equal "split, element is in list"
	126	'((foo) (baz))
	127	(call-with-values
	128	(lambda ()
	129	(split '(foo bar baz) 'bar))
	130	list))
	131
	132	(test-equal "split, element is not in list"
	133	'((foo bar baz) ())
	134	(call-with-values
	135	(lambda ()
	136	(split '(foo bar baz) 'quux))
	137	list))
	138
5e110382 LC	139	(test-equal "strip-keyword-arguments"
	140	'(a #:b b #:c c)
	141	(strip-keyword-arguments '(#:foo #:bar #:baz)
	142	'(a #:foo 42 #:b b #:baz 3
	143	#:c c #:bar 4)))
	144
6071122b LC	145	(test-equal "ensure-keyword-arguments"
	146	'((#:foo 2)
	147	(#:foo 2 #:bar 3)
	148	(#:foo 42 #:bar 3))
	149	(list (ensure-keyword-arguments '(#:foo 2) '(#:foo 2))
	150	(ensure-keyword-arguments '(#:foo 2) '(#:bar 3))
	151	(ensure-keyword-arguments '(#:foo 2) '(#:bar 3 #:foo 42))))
	152
516e3b6f EB	153	(let* ((tree (alist->vhash
	154	'((0 2 3) (1 3 4) (2) (3 5 6) (4 6) (5) (6))
	155	hashq))
	156	(add-one (lambda (_ r) (1+ r)))
	157	(tree-lookup (lambda (n) (cdr (vhash-assq n tree)))))
	158	(test-equal "fold-tree, single root"
	159	5 (fold-tree add-one 0 tree-lookup '(0)))
	160	(test-equal "fold-tree, two roots"
	161	7 (fold-tree add-one 0 tree-lookup '(0 1)))
	162	(test-equal "fold-tree, sum"
	163	16 (fold-tree + 0 tree-lookup '(0)))
	164	(test-equal "fold-tree, internal"
	165	18 (fold-tree + 0 tree-lookup '(3 4)))
	166	(test-equal "fold-tree, cons"
	167	'(1 3 4 5 6)
	168	(sort (fold-tree cons '() tree-lookup '(1)) <))
	169	(test-equal "fold-tree, overlapping paths"
	170	'(1 3 4 5 6)
	171	(sort (fold-tree cons '() tree-lookup '(1 4)) <))
	172	(test-equal "fold-tree, cons, two roots"
	173	'(0 2 3 4 5 6)
	174	(sort (fold-tree cons '() tree-lookup '(0 4)) <))
	175	(test-equal "fold-tree-leaves, single root"
	176	2 (fold-tree-leaves add-one 0 tree-lookup '(1)))
	177	(test-equal "fold-tree-leaves, single root, sum"
	178	11 (fold-tree-leaves + 0 tree-lookup '(1)))
	179	(test-equal "fold-tree-leaves, two roots"
	180	3 (fold-tree-leaves add-one 0 tree-lookup '(0 1)))
	181	(test-equal "fold-tree-leaves, two roots, sum"
	182	13 (fold-tree-leaves + 0 tree-lookup '(0 1))))
	183
e0fbbc88	184	(test-assert "filtered-port, file"
101d9f3f	185	(let* ((file (search-path %load-path "guix.scm"))
b6952cad	186	(input (open-file file "r0b")))
101d9f3f LC	187	(let*-values (((compressed pids1)
	188	(filtered-port `(,%gzip "-c" "--fast") input))
	189	((decompressed pids2)
	190	(filtered-port `(,%gzip "-d") compressed)))
	191	(and (every (compose zero? cdr waitpid)
	192	(append pids1 pids2))
	193	(equal? (get-bytevector-all decompressed)
	194	(call-with-input-file file get-bytevector-all))))))
e0fbbc88 LC	195
	196	(test-assert "filtered-port, non-file"
	197	(let ((data (call-with-input-file (search-path %load-path "guix.scm")
	198	get-bytevector-all)))
	199	(let*-values (((compressed pids1)
	200	(filtered-port `(,%gzip "-c" "--fast")
	201	(open-bytevector-input-port data)))
	202	((decompressed pids2)
	203	(filtered-port `(,%gzip "-d") compressed)))
	204	(and (pk (every (compose zero? cdr waitpid)
	205	(append pids1 pids2)))
	206	(equal? (get-bytevector-all decompressed) data)))))
	207
443eb4e9 LC	208	(test-assert "filtered-port, does not exist"
	209	(let* ((file (search-path %load-path "guix.scm"))
	210	(input (open-file file "r0b")))
	211	(let-values (((port pids)
	212	(filtered-port '("/does/not/exist") input)))
	213	(any (compose (negate zero?) cdr waitpid)
	214	pids))))
	215
7a8024a3 LC	216	(test-assert "compressed-port, decompressed-port, non-file"
	217	(let ((data (call-with-input-file (search-path %load-path "guix.scm")
	218	get-bytevector-all)))
	219	(let*-values (((compressed pids1)
	220	(compressed-port 'xz (open-bytevector-input-port data)))
	221	((decompressed pids2)
	222	(decompressed-port 'xz compressed)))
	223	(and (every (compose zero? cdr waitpid)
	224	(append pids1 pids2))
	225	(equal? (get-bytevector-all decompressed) data)))))
	226
80dea563	227	(false-if-exception (delete-file temp-file))
01ac19dc LC	228	(test-assert "compressed-output-port + decompressed-port"
01ac19dc LC	229	(let* ((file (search-path %load-path "guix/derivations.scm"))
30ce8012 LC	230	(data (call-with-input-file file get-bytevector-all))
	231	(port (open-file temp-file "w0b")))
	232	(call-with-compressed-output-port 'xz port
01ac19dc LC	233	(lambda (compressed)
01ac19dc LC	234	(put-bytevector compressed data)))
30ce8012	235	(close-port port)
01ac19dc LC	236
	237	(bytevector=? data
	238	(call-with-decompressed-port 'xz (open-file temp-file "r0b")
	239	get-bytevector-all))))
80dea563	240
827d5563	241	(false-if-exception (delete-file temp-file))
c7445833	242	(test-equal "fcntl-flock wait"
827d5563	243	42 ; the child's exit status
68ec0450	244	(let ((file (open-file temp-file "w0b")))
827d5563 LC	245	;; Acquire an exclusive lock.
827d5563 LC	246	(fcntl-flock file 'write-lock)
2cd5c038 LC	247	(match (primitive-fork)
	248	(0
	249	(dynamic-wind
	250	(const #t)
	251	(lambda ()
827d5563	252	;; Reopen FILE read-only so we can have a read lock.
68ec0450	253	(let ((file (open-file temp-file "r0b")))
827d5563 LC	254	;; Wait until we can acquire the lock.
	255	(fcntl-flock file 'read-lock)
	256	(primitive-exit (read file)))
2cd5c038 LC	257	(primitive-exit 1))
	258	(lambda ()
	259	(primitive-exit 2))))
	260	(pid
827d5563 LC	261	;; Write garbage and wait.
	262	(display "hello, world!" file)
	263	(force-output file)
	264	(sleep 1)
	265
	266	;; Write the real answer.
	267	(seek file 0 SEEK_SET)
	268	(truncate-file file 0)
	269	(write 42 file)
	270	(force-output file)
	271
	272	;; Unlock, which should let the child continue.
	273	(fcntl-flock file 'unlock)
	274
2cd5c038 LC	275	(match (waitpid pid)
	276	((_ . status)
	277	(let ((result (status:exit-val status)))
2cd5c038 LC	278	(close-port file)
	279	result)))))))
	280
c7445833 LC	281	(test-equal "fcntl-flock non-blocking"
	282	EAGAIN ; the child's exit status
	283	(match (pipe)
	284	((input . output)
	285	(match (primitive-fork)
	286	(0
	287	(dynamic-wind
	288	(const #t)
	289	(lambda ()
	290	(close-port output)
	291
	292	;; Wait for the green light.
	293	(read-char input)
	294
	295	;; Open FILE read-only so we can have a read lock.
68ec0450	296	(let ((file (open-file temp-file "w0")))
c7445833 LC	297	(catch 'flock-error
	298	(lambda ()
	299	;; This attempt should throw EAGAIN.
	300	(fcntl-flock file 'write-lock #:wait? #f))
	301	(lambda (key errno)
68ec0450	302	(primitive-exit (pk 'errno errno)))))
c7445833 LC	303	(primitive-exit -1))
	304	(lambda ()
	305	(primitive-exit -2))))
	306	(pid
	307	(close-port input)
68ec0450	308	(let ((file (open-file temp-file "w0")))
c7445833 LC	309	;; Acquire an exclusive lock.
	310	(fcntl-flock file 'write-lock)
	311
	312	;; Tell the child to continue.
	313	(write 'green-light output)
	314	(force-output output)
	315
	316	(match (waitpid pid)
	317	((_ . status)
	318	(let ((result (status:exit-val status)))
	319	(fcntl-flock file 'unlock)
	320	(close-port file)
	321	result)))))))))
	322
e3d74106 LC	323	;; This is actually in (guix store).
	324	(test-equal "store-path-package-name"
	325	"bash-4.2-p24"
	326	(store-path-package-name
b980f0f9 LC	327	(string-append (%store-prefix)
b980f0f9 LC	328	"/qvs2rj2ia5vci3wsdb7qvydrmacig4pg-bash-4.2-p24")))
e3d74106	329
c8be6f0d FB	330	(test-equal "canonical-newline-port"
	331	"This is a journey\nInto the sound\nA journey ...\n"
	332	(let ((port (open-string-input-port
	333	"This is a journey\r\nInto the sound\r\nA journey ...\n")))
	334	(get-string-all (canonical-newline-port port))))
	335
e3deeebb LC	336	(test-end)
e3deeebb LC	337
827d5563	338	(false-if-exception (delete-file temp-file))