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

;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2015, 2016, 2017 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-services)
  #:use-module (gnu services)
  #:use-module (gnu services herd)
  #:use-module (gnu services shepherd)
  #:use-module (srfi srfi-1)
  #:use-module (srfi srfi-26)
  #:use-module (srfi srfi-34)
  #:use-module (srfi srfi-64)
  #:use-module (ice-9 match))

(define live-service
  (@@ (gnu services herd) live-service))

\f
(test-begin "services")

(test-equal "services, default value"
  '(42 123 234 error)
  (let* ((t1 (service-type (name 't1) (extensions '())))
         (t2 (service-type (name 't2) (extensions '())
                           (default-value 42))))
    (list (service-value (service t2))
          (service-value (service t2 123))
          (service-value (service t1 234))
          (guard (c ((missing-value-service-error? c) 'error))
            (service t1)))))

(test-assert "service-back-edges"
  (let* ((t1 (service-type (name 't1) (extensions '())
                           (compose +) (extend *)))
         (t2 (service-type (name 't2)
                           (extensions
                            (list (service-extension t1 (const '()))))
                           (compose +) (extend *)))
         (t3 (service-type (name 't3)
                           (extensions
                            (list (service-extension t2 identity)
                                  (service-extension t1 list)))))
         (s1 (service t1 #t))
         (s2 (service t2 #t))
         (s3 (service t3 #t))
         (e  (service-back-edges (list s1 s2 s3))))
    (and (lset= eq? (e s1) (list s2 s3))
         (lset= eq? (e s2) (list s3))
         (null? (e s3)))))

(test-equal "fold-services"
  ;; Make sure 'fold-services' returns the right result.  The numbers come
  ;; from services of type T3; 'xyz 60' comes from the service of type T2,
  ;; where 60 = 15 × 4 = (1 + 2 + 3 + 4 + 5) × 4.
  '(initial-value 5 4 3 2 1 xyz 60)
  (let* ((t1 (service-type (name 't1) (extensions '())
                           (compose concatenate)
                           (extend cons)))
         (t2 (service-type (name 't2)
                           (extensions
                            (list (service-extension t1
                                                     (cut list 'xyz <>))))
                           (compose (cut reduce + 0 <>))
                           (extend *)))
         (t3 (service-type (name 't3)
                           (extensions
                            (list (service-extension t2 identity)
                                  (service-extension t1 list)))))
         (r  (fold-services (cons* (service t1 'initial-value)
                                   (service t2 4)
                                   (map (lambda (x)
                                          (service t3 x))
                                        (iota 5 1)))
                            #:target-type t1)))
    (and (eq? (service-kind r) t1)
         (service-value r))))

(test-assert "fold-services, ambiguity"
  (let* ((t1 (service-type (name 't1) (extensions '())
                           (compose concatenate)
                           (extend cons)))
         (t2 (service-type (name 't2)
                           (extensions
                            (list (service-extension t1 list)))))
         (s  (service t2 42)))
    (guard (c ((ambiguous-target-service-error? c)
               (and (eq? (ambiguous-target-service-error-target-type c)
                         t1)
                    (eq? (ambiguous-target-service-error-service c)
                         s))))
      (fold-services (list (service t1 'first)
                           (service t1 'second)
                           s)
                     #:target-type t1)
      #f)))

(test-assert "fold-services, missing target"
  (let* ((t1 (service-type (name 't1) (extensions '())))
         (t2 (service-type (name 't2)
                           (extensions
                            (list (service-extension t1 list)))))
         (s  (service t2 42)))
    (guard (c ((missing-target-service-error? c)
               (and (eq? (missing-target-service-error-target-type c)
                         t1)
                    (eq? (missing-target-service-error-service c)
                         s))))
      (fold-services (list s) #:target-type t1)
      #f)))

(test-assert "shepherd-service-lookup-procedure"
  (let* ((s1 (shepherd-service (provision '(s1 s1b)) (start #f)))
         (s2 (shepherd-service (provision '(s2 s2b)) (start #f)))
         (s3 (shepherd-service (provision '(s3 s3b s3c)) (start #f)))
         (lookup (shepherd-service-lookup-procedure (list s1 s2 s3))))
    (and (eq? (lookup 's1) (lookup 's1b) s1)
         (eq? (lookup 's2) (lookup 's2b) s2)
         (eq? (lookup 's3) (lookup 's3b) s3))))

(test-assert "shepherd-service-back-edges"
  (let* ((s1 (shepherd-service (provision '(s1)) (start #f)))
         (s2 (shepherd-service (provision '(s2))
                               (requirement '(s1))
                               (start #f)))
         (s3 (shepherd-service (provision '(s3))
                               (requirement '(s1 s2))
                               (start #f)))
         (e  (shepherd-service-back-edges (list s1 s2 s3))))
    (and (lset= eq? (e s1) (list s2 s3))
         (lset= eq? (e s2) (list s3))
         (null? (e s3)))))

(test-equal "shepherd-service-upgrade: nothing to do"
  '(() ())
  (call-with-values
      (lambda ()
        (shepherd-service-upgrade '() '()))
    list))

(test-equal "shepherd-service-upgrade: one unchanged, one upgraded, one new"
  '(((bar))                                       ;unload
    ((bar) (baz)))                                ;load
  (call-with-values
      (lambda ()
        ;; Here 'foo' is not upgraded because it is still running, whereas
        ;; 'bar' is upgraded because it is not currently running.  'baz' is
        ;; loaded because it's a new service.
        (shepherd-service-upgrade
         (list (live-service '(foo) '() #t)
               (live-service '(bar) '() #f)
               (live-service '(root) '() #t))     ;essential!
         (list (shepherd-service (provision '(foo))
                                 (start #t))
               (shepherd-service (provision '(bar))
                                 (start #t))
               (shepherd-service (provision '(baz))
                                 (start #t)))))
    (lambda (unload load)
      (list (map live-service-provision unload)
            (map shepherd-service-provision load)))))

(test-equal "shepherd-service-upgrade: service depended on is not unloaded"
  '(((baz))                                       ;unload
    ())                                           ;load
  (call-with-values
      (lambda ()
        ;; Service 'bar' is not among the target services; yet, it must not be
        ;; unloaded because 'foo' depends on it.
        (shepherd-service-upgrade
         (list (live-service '(foo) '(bar) #t)
               (live-service '(bar) '() #t)       ;still used!
               (live-service '(baz) '() #t))
         (list (shepherd-service (provision '(foo))
                                 (start #t)))))
    (lambda (unload load)
      (list (map live-service-provision unload)
            (map shepherd-service-provision load)))))

(test-equal "shepherd-service-upgrade: obsolete services that depend on each other"
  '(((foo) (bar) (baz))                           ;unload
    ((qux)))                                      ;load
  (call-with-values
      (lambda ()
        ;; 'foo', 'bar', and 'baz' depend on each other, but all of them are
        ;; obsolete, and thus should be unloaded.
        (shepherd-service-upgrade
         (list (live-service '(foo) '(bar) #t)    ;obsolete
               (live-service '(bar) '(baz) #t)    ;obsolete
               (live-service '(baz) '() #t))      ;obsolete
         (list (shepherd-service (provision '(qux))
                                 (start #t)))))
    (lambda (unload load)
      (list (map live-service-provision unload)
            (map shepherd-service-provision load)))))

(test-eq "lookup-service-types"
  system-service-type
  (and (null? (lookup-service-types 'does-not-exist-at-all))
       (match (lookup-service-types 'system)
         ((one) one)
         (x x))))

(test-end)
Commit	Line	Data
0adfe95a	1	;;; GNU Guix --- Functional package management for GNU
efe7d19a	2	;;; Copyright © 2015, 2016, 2017 Ludovic Courtès <ludo@gnu.org>
0adfe95a LC	3	;;;
	4	;;; This file is part of GNU Guix.
	5	;;;
	6	;;; GNU Guix is free software; you can redistribute it and/or modify it
	7	;;; under the terms of the GNU General Public License as published by
	8	;;; the Free Software Foundation; either version 3 of the License, or (at
	9	;;; your option) any later version.
	10	;;;
	11	;;; GNU Guix is distributed in the hope that it will be useful, but
	12	;;; WITHOUT ANY WARRANTY; without even the implied warranty of
	13	;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	14	;;; GNU General Public License for more details.
	15	;;;
	16	;;; You should have received a copy of the GNU General Public License
	17	;;; along with GNU Guix. If not, see <http://www.gnu.org/licenses/>.
	18
	19	(define-module (test-services)
	20	#:use-module (gnu services)
7b44cae5	21	#:use-module (gnu services herd)
0190c1c0	22	#:use-module (gnu services shepherd)
0adfe95a LC	23	#:use-module (srfi srfi-1)
	24	#:use-module (srfi srfi-26)
	25	#:use-module (srfi srfi-34)
49483f71 LC	26	#:use-module (srfi srfi-64)
49483f71 LC	27	#:use-module (ice-9 match))
0adfe95a	28
7b44cae5 LC	29	(define live-service
	30	(@@ (gnu services herd) live-service))
	31
	32	\f
0adfe95a LC	33	(test-begin "services")
0adfe95a LC	34
1bb895ea LC	35	(test-equal "services, default value"
	36	'(42 123 234 error)
	37	(let* ((t1 (service-type (name 't1) (extensions '())))
	38	(t2 (service-type (name 't2) (extensions '())
	39	(default-value 42))))
	40	(list (service-value (service t2))
	41	(service-value (service t2 123))
	42	(service-value (service t1 234))
	43	(guard (c ((missing-value-service-error? c) 'error))
	44	(service t1)))))
	45
5152d13b LC	46	(test-assert "service-back-edges"
	47	(let* ((t1 (service-type (name 't1) (extensions '())
	48	(compose +) (extend *)))
	49	(t2 (service-type (name 't2)
	50	(extensions
	51	(list (service-extension t1 (const '()))))
	52	(compose +) (extend *)))
	53	(t3 (service-type (name 't3)
	54	(extensions
	55	(list (service-extension t2 identity)
	56	(service-extension t1 list)))))
	57	(s1 (service t1 #t))
	58	(s2 (service t2 #t))
	59	(s3 (service t3 #t))
	60	(e (service-back-edges (list s1 s2 s3))))
	61	(and (lset= eq? (e s1) (list s2 s3))
	62	(lset= eq? (e s2) (list s3))
	63	(null? (e s3)))))
	64
0adfe95a LC	65	(test-equal "fold-services"
	66	;; Make sure 'fold-services' returns the right result. The numbers come
	67	;; from services of type T3; 'xyz 60' comes from the service of type T2,
	68	;; where 60 = 15 × 4 = (1 + 2 + 3 + 4 + 5) × 4.
	69	'(initial-value 5 4 3 2 1 xyz 60)
	70	(let* ((t1 (service-type (name 't1) (extensions '())
	71	(compose concatenate)
	72	(extend cons)))
	73	(t2 (service-type (name 't2)
	74	(extensions
	75	(list (service-extension t1
	76	(cut list 'xyz <>))))
	77	(compose (cut reduce + 0 <>))
	78	(extend *)))
	79	(t3 (service-type (name 't3)
	80	(extensions
	81	(list (service-extension t2 identity)
	82	(service-extension t1 list)))))
	83	(r (fold-services (cons* (service t1 'initial-value)
	84	(service t2 4)
	85	(map (lambda (x)
	86	(service t3 x))
	87	(iota 5 1)))
	88	#:target-type t1)))
	89	(and (eq? (service-kind r) t1)
efe7d19a	90	(service-value r))))
0adfe95a LC	91
	92	(test-assert "fold-services, ambiguity"
	93	(let* ((t1 (service-type (name 't1) (extensions '())
	94	(compose concatenate)
	95	(extend cons)))
	96	(t2 (service-type (name 't2)
	97	(extensions
	98	(list (service-extension t1 list)))))
	99	(s (service t2 42)))
	100	(guard (c ((ambiguous-target-service-error? c)
	101	(and (eq? (ambiguous-target-service-error-target-type c)
	102	t1)
	103	(eq? (ambiguous-target-service-error-service c)
	104	s))))
	105	(fold-services (list (service t1 'first)
	106	(service t1 'second)
	107	s)
	108	#:target-type t1)
	109	#f)))
	110
	111	(test-assert "fold-services, missing target"
	112	(let* ((t1 (service-type (name 't1) (extensions '())))
	113	(t2 (service-type (name 't2)
	114	(extensions
	115	(list (service-extension t1 list)))))
	116	(s (service t2 42)))
	117	(guard (c ((missing-target-service-error? c)
	118	(and (eq? (missing-target-service-error-target-type c)
	119	t1)
	120	(eq? (missing-target-service-error-service c)
	121	s))))
	122	(fold-services (list s) #:target-type t1)
	123	#f)))
	124
a5d78eb6 LC	125	(test-assert "shepherd-service-lookup-procedure"
	126	(let* ((s1 (shepherd-service (provision '(s1 s1b)) (start #f)))
	127	(s2 (shepherd-service (provision '(s2 s2b)) (start #f)))
	128	(s3 (shepherd-service (provision '(s3 s3b s3c)) (start #f)))
	129	(lookup (shepherd-service-lookup-procedure (list s1 s2 s3))))
	130	(and (eq? (lookup 's1) (lookup 's1b) s1)
	131	(eq? (lookup 's2) (lookup 's2b) s2)
	132	(eq? (lookup 's3) (lookup 's3b) s3))))
	133
d4053c71 AK	134	(test-assert "shepherd-service-back-edges"
	135	(let* ((s1 (shepherd-service (provision '(s1)) (start #f)))
	136	(s2 (shepherd-service (provision '(s2))
	137	(requirement '(s1))
	138	(start #f)))
	139	(s3 (shepherd-service (provision '(s3))
	140	(requirement '(s1 s2))
	141	(start #f)))
	142	(e (shepherd-service-back-edges (list s1 s2 s3))))
80a67734 LC	143	(and (lset= eq? (e s1) (list s2 s3))
	144	(lset= eq? (e s2) (list s3))
	145	(null? (e s3)))))
	146
7b44cae5 LC	147	(test-equal "shepherd-service-upgrade: nothing to do"
	148	'(() ())
	149	(call-with-values
	150	(lambda ()
	151	(shepherd-service-upgrade '() '()))
	152	list))
	153
	154	(test-equal "shepherd-service-upgrade: one unchanged, one upgraded, one new"
	155	'(((bar)) ;unload
	156	((bar) (baz))) ;load
	157	(call-with-values
	158	(lambda ()
	159	;; Here 'foo' is not upgraded because it is still running, whereas
	160	;; 'bar' is upgraded because it is not currently running. 'baz' is
	161	;; loaded because it's a new service.
	162	(shepherd-service-upgrade
	163	(list (live-service '(foo) '() #t)
	164	(live-service '(bar) '() #f)
	165	(live-service '(root) '() #t)) ;essential!
	166	(list (shepherd-service (provision '(foo))
	167	(start #t))
	168	(shepherd-service (provision '(bar))
	169	(start #t))
	170	(shepherd-service (provision '(baz))
	171	(start #t)))))
	172	(lambda (unload load)
	173	(list (map live-service-provision unload)
	174	(map shepherd-service-provision load)))))
	175
	176	(test-equal "shepherd-service-upgrade: service depended on is not unloaded"
	177	'(((baz)) ;unload
	178	()) ;load
	179	(call-with-values
	180	(lambda ()
	181	;; Service 'bar' is not among the target services; yet, it must not be
	182	;; unloaded because 'foo' depends on it.
	183	(shepherd-service-upgrade
	184	(list (live-service '(foo) '(bar) #t)
	185	(live-service '(bar) '() #t) ;still used!
	186	(live-service '(baz) '() #t))
	187	(list (shepherd-service (provision '(foo))
	188	(start #t)))))
	189	(lambda (unload load)
	190	(list (map live-service-provision unload)
	191	(map shepherd-service-provision load)))))
	192
	193	(test-equal "shepherd-service-upgrade: obsolete services that depend on each other"
	194	'(((foo) (bar) (baz)) ;unload
	195	((qux))) ;load
	196	(call-with-values
	197	(lambda ()
	198	;; 'foo', 'bar', and 'baz' depend on each other, but all of them are
	199	;; obsolete, and thus should be unloaded.
	200	(shepherd-service-upgrade
	201	(list (live-service '(foo) '(bar) #t) ;obsolete
	202	(live-service '(bar) '(baz) #t) ;obsolete
	203	(live-service '(baz) '() #t)) ;obsolete
	204	(list (shepherd-service (provision '(qux))
	205	(start #t)))))
	206	(lambda (unload load)
	207	(list (map live-service-provision unload)
	208	(map shepherd-service-provision load)))))
	209
49483f71 LC	210	(test-eq "lookup-service-types"
	211	system-service-type
	212	(and (null? (lookup-service-types 'does-not-exist-at-all))
	213	(match (lookup-service-types 'system)
	214	((one) one)
	215	(x x))))
	216
0adfe95a	217	(test-end)