tests/services.scm

   1 ;;; GNU Guix --- Functional package management for GNU
   2 ;;; Copyright © 2015, 2016, 2017, 2018, 2019 Ludovic Courtès <ludo@gnu.org>
   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)
  21   #:use-module (gnu services herd)
  22   #:use-module (gnu services shepherd)
  23   #:use-module (srfi srfi-1)
  24   #:use-module (srfi srfi-26)
  25   #:use-module (srfi srfi-34)
  26   #:use-module (srfi srfi-64)
  27   #:use-module (ice-9 match))
  28
  29 (test-begin "services")
  30
  31 (test-equal "services, default value"
  32   '(42 123 234 error)
  33   (let* ((t1 (service-type (name 't1) (extensions '())))
  34          (t2 (service-type (name 't2) (extensions '())
  35                            (default-value 42))))
  36     (list (service-value (service t2))
  37           (service-value (service t2 123))
  38           (service-value (service t1 234))
  39           (guard (c ((missing-value-service-error? c) 'error))
  40             (service t1)))))
  41
  42 (test-assert "service-back-edges"
  43   (let* ((t1 (service-type (name 't1) (extensions '())
  44                            (compose +) (extend *)))
  45          (t2 (service-type (name 't2)
  46                            (extensions
  47                             (list (service-extension t1 (const '()))))
  48                            (compose +) (extend *)))
  49          (t3 (service-type (name 't3)
  50                            (extensions
  51                             (list (service-extension t2 identity)
  52                                   (service-extension t1 list)))))
  53          (s1 (service t1 #t))
  54          (s2 (service t2 #t))
  55          (s3 (service t3 #t))
  56          (e  (service-back-edges (list s1 s2 s3))))
  57     (and (lset= eq? (e s1) (list s2 s3))
  58          (lset= eq? (e s2) (list s3))
  59          (null? (e s3)))))
  60
  61 (test-equal "fold-services"
  62   ;; Make sure 'fold-services' returns the right result.  The numbers come
  63   ;; from services of type T3; 'xyz 60' comes from the service of type T2,
  64   ;; where 60 = 15 × 4 = (1 + 2 + 3 + 4 + 5) × 4.
  65   '(initial-value 5 4 3 2 1 xyz 60)
  66   (let* ((t1 (service-type (name 't1) (extensions '())
  67                            (compose concatenate)
  68                            (extend cons)))
  69          (t2 (service-type (name 't2)
  70                            (extensions
  71                             (list (service-extension t1
  72                                                      (cut list 'xyz <>))))
  73                            (compose (cut reduce + 0 <>))
  74                            (extend *)))
  75          (t3 (service-type (name 't3)
  76                            (extensions
  77                             (list (service-extension t2 identity)
  78                                   (service-extension t1 list)))))
  79          (r  (fold-services (cons* (service t1 'initial-value)
  80                                    (service t2 4)
  81                                    (map (lambda (x)
  82                                           (service t3 x))
  83                                         (iota 5 1)))
  84                             #:target-type t1)))
  85     (and (eq? (service-kind r) t1)
  86          (service-value r))))
  87
  88 (test-assert "fold-services, ambiguity"
  89   (let* ((t1 (service-type (name 't1) (extensions '())
  90                            (compose concatenate)
  91                            (extend cons)))
  92          (t2 (service-type (name 't2)
  93                            (extensions
  94                             (list (service-extension t1 list)))))
  95          (s  (service t2 42)))
  96     (guard (c ((ambiguous-target-service-error? c)
  97                (and (eq? (ambiguous-target-service-error-target-type c)
  98                          t1)
  99                     (eq? (ambiguous-target-service-error-service c)
 100                          s))))
 101       (fold-services (list (service t1 'first)
 102                            (service t1 'second)
 103                            s)
 104                      #:target-type t1)
 105       #f)))
 106
 107 (test-assert "fold-services, missing target"
 108   (let* ((t1 (service-type (name 't1) (extensions '())))
 109          (t2 (service-type (name 't2)
 110                            (extensions
 111                             (list (service-extension t1 list)))))
 112          (s  (service t2 42)))
 113     (guard (c ((missing-target-service-error? c)
 114                (and (eq? (missing-target-service-error-target-type c)
 115                          t1)
 116                     (eq? (missing-target-service-error-service c)
 117                          s))))
 118       (fold-services (list s) #:target-type t1)
 119       #f)))
 120
 121 (test-assert "instantiate-missing-services"
 122   (let* ((t1 (service-type (name 't1) (extensions '())
 123                            (default-value 'dflt)
 124                            (compose concatenate)
 125                            (extend cons)))
 126          (t2 (service-type (name 't2)
 127                            (extensions
 128                             (list (service-extension t1 list)))))
 129          (s1 (service t1 'hey!))
 130          (s2 (service t2 42)))
 131     (and (lset= equal?
 132                 (list (service t1) s2)
 133                 (instantiate-missing-services (list s2)))
 134          (equal? (list s1 s2)
 135                  (instantiate-missing-services (list s1 s2))))))
 136
 137 (test-assert "instantiate-missing-services, indirect"
 138   (let* ((t1 (service-type (name 't1) (extensions '())
 139                            (default-value 'dflt)
 140                            (compose concatenate)
 141                            (extend cons)))
 142          (t2 (service-type (name 't2)
 143                            (default-value 'dflt2)
 144                            (compose concatenate)
 145                            (extend cons)
 146                            (extensions
 147                             (list (service-extension t1 list)))))
 148          (t3 (service-type (name 't3)
 149                            (extensions
 150                             (list (service-extension t2 list)))))
 151          (s1 (service t1))
 152          (s2 (service t2))
 153          (s3 (service t3 42))
 154          (== (cut lset= equal? <...>)))
 155     (and (== (list s1 s2 s3)
 156              (instantiate-missing-services (list s3)))
 157          (== (list s1 s2 s3)
 158              (instantiate-missing-services (list s1 s3)))
 159          (== (list s1 s2 s3)
 160              (instantiate-missing-services (list s2 s3))))))
 161
 162 (test-assert "instantiate-missing-services, no default value"
 163   (let* ((t1 (service-type (name 't1) (extensions '())))
 164          (t2 (service-type (name 't2)
 165                            (extensions
 166                             (list (service-extension t1 list)))))
 167          (s  (service t2 42)))
 168     (guard (c ((missing-target-service-error? c)
 169                (and (eq? (missing-target-service-error-target-type c)
 170                          t1)
 171                     (eq? (missing-target-service-error-service c)
 172                          s))))
 173       (instantiate-missing-services (list s))
 174       #f)))
 175
 176 (test-assert "shepherd-service-lookup-procedure"
 177   (let* ((s1 (shepherd-service (provision '(s1 s1b)) (start #f)))
 178          (s2 (shepherd-service (provision '(s2 s2b)) (start #f)))
 179          (s3 (shepherd-service (provision '(s3 s3b s3c)) (start #f)))
 180          (lookup (shepherd-service-lookup-procedure (list s1 s2 s3))))
 181     (and (eq? (lookup 's1) (lookup 's1b) s1)
 182          (eq? (lookup 's2) (lookup 's2b) s2)
 183          (eq? (lookup 's3) (lookup 's3b) s3))))
 184
 185 (test-assert "shepherd-service-back-edges"
 186   (let* ((s1 (shepherd-service (provision '(s1)) (start #f)))
 187          (s2 (shepherd-service (provision '(s2))
 188                                (requirement '(s1))
 189                                (start #f)))
 190          (s3 (shepherd-service (provision '(s3))
 191                                (requirement '(s1 s2))
 192                                (start #f)))
 193          (e  (shepherd-service-back-edges (list s1 s2 s3))))
 194     (and (lset= eq? (e s1) (list s2 s3))
 195          (lset= eq? (e s2) (list s3))
 196          (null? (e s3)))))
 197
 198 (test-equal "shepherd-service-upgrade: nothing to do"
 199   '(() ())
 200   (call-with-values
 201       (lambda ()
 202         (shepherd-service-upgrade '() '()))
 203     list))
 204
 205 (test-equal "shepherd-service-upgrade: one unchanged, one upgraded, one new"
 206   '(()                                            ;unload
 207     ((foo)))                                      ;restart
 208   (call-with-values
 209       (lambda ()
 210         ;; Here 'foo' is replaced and must be explicitly restarted later
 211         ;; because it is still running, whereas 'bar' is upgraded right away
 212         ;; because it is not currently running.  'baz' is loaded because it's
 213         ;; a new service.
 214         (shepherd-service-upgrade
 215          (list (live-service '(foo) '() #t)
 216                (live-service '(bar) '() #f)
 217                (live-service '(root) '() #t))     ;essential!
 218          (list (shepherd-service (provision '(foo))
 219                                  (start #t))
 220                (shepherd-service (provision '(bar))
 221                                  (start #t))
 222                (shepherd-service (provision '(baz))
 223                                  (start #t)))))
 224     (lambda (unload restart)
 225       (list (map live-service-provision unload)
 226             (map shepherd-service-provision restart)))))
 227
 228 (test-equal "shepherd-service-upgrade: service depended on is not unloaded"
 229   '(((baz))                                       ;unload
 230     ((foo)))                                      ;restart
 231   (call-with-values
 232       (lambda ()
 233         ;; Service 'bar' is not among the target services; yet, it must not be
 234         ;; unloaded because 'foo' depends on it.  'foo' gets replaced but it
 235         ;; must be restarted manually.
 236         (shepherd-service-upgrade
 237          (list (live-service '(foo) '(bar) #t)
 238                (live-service '(bar) '() #t)       ;still used!
 239                (live-service '(baz) '() #t))
 240          (list (shepherd-service (provision '(foo))
 241                                  (start #t)))))
 242     (lambda (unload restart)
 243       (list (map live-service-provision unload)
 244             (map shepherd-service-provision restart)))))
 245
 246 (test-equal "shepherd-service-upgrade: obsolete services that depend on each other"
 247   '(((foo) (bar) (baz))                           ;unload
 248     ())                                           ;restart
 249   (call-with-values
 250       (lambda ()
 251         ;; 'foo', 'bar', and 'baz' depend on each other, but all of them are
 252         ;; obsolete, and thus should be unloaded.
 253         (shepherd-service-upgrade
 254          (list (live-service '(foo) '(bar) #t)    ;obsolete
 255                (live-service '(bar) '(baz) #t)    ;obsolete
 256                (live-service '(baz) '() #t))      ;obsolete
 257          (list (shepherd-service (provision '(qux))
 258                                  (start #t)))))
 259     (lambda (unload restart)
 260       (list (map live-service-provision unload)
 261             (map shepherd-service-provision restart)))))
 262
 263 (test-eq "lookup-service-types"
 264   system-service-type
 265   (and (null? (lookup-service-types 'does-not-exist-at-all))
 266        (match (lookup-service-types 'system)
 267          ((one) one)
 268          (x x))))
 269
 270 (test-end)