tests/services.scm

   1 ;;; GNU Guix --- Functional package management for GNU
   2 ;;; Copyright © 2015, 2016, 2017, 2018 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 (define live-service
  30   (@@ (gnu services herd) live-service))
  31
  32 \f
  33 (test-begin "services")
  34
  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
  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
  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)
  90          (service-value r))))
  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
 125 (test-assert "instantiate-missing-services"
 126   (let* ((t1 (service-type (name 't1) (extensions '())
 127                            (default-value 'dflt)
 128                            (compose concatenate)
 129                            (extend cons)))
 130          (t2 (service-type (name 't2)
 131                            (extensions
 132                             (list (service-extension t1 list)))))
 133          (s1 (service t1 'hey!))
 134          (s2 (service t2 42)))
 135     (and (lset= equal?
 136                 (list (service t1) s2)
 137                 (instantiate-missing-services (list s2)))
 138          (equal? (list s1 s2)
 139                  (instantiate-missing-services (list s1 s2))))))
 140
 141 (test-assert "instantiate-missing-services, indirect"
 142   (let* ((t1 (service-type (name 't1) (extensions '())
 143                            (default-value 'dflt)
 144                            (compose concatenate)
 145                            (extend cons)))
 146          (t2 (service-type (name 't2) (extensions '())
 147                            (default-value 'dflt2)
 148                            (compose concatenate)
 149                            (extend cons)
 150                            (extensions
 151                             (list (service-extension t1 list)))))
 152          (t3 (service-type (name 't3)
 153                            (extensions
 154                             (list (service-extension t2 list)))))
 155          (s1 (service t1))
 156          (s2 (service t2))
 157          (s3 (service t3 42))
 158          (== (cut lset= equal? <...>)))
 159     (and (== (list s1 s2 s3)
 160              (instantiate-missing-services (list s3)))
 161          (== (list s1 s2 s3)
 162              (instantiate-missing-services (list s1 s3)))
 163          (== (list s1 s2 s3)
 164              (instantiate-missing-services (list s2 s3))))))
 165
 166 (test-assert "instantiate-missing-services, no default value"
 167   (let* ((t1 (service-type (name 't1) (extensions '())))
 168          (t2 (service-type (name 't2)
 169                            (extensions
 170                             (list (service-extension t1 list)))))
 171          (s  (service t2 42)))
 172     (guard (c ((missing-target-service-error? c)
 173                (and (eq? (missing-target-service-error-target-type c)
 174                          t1)
 175                     (eq? (missing-target-service-error-service c)
 176                          s))))
 177       (instantiate-missing-services (list s))
 178       #f)))
 179
 180 (test-assert "shepherd-service-lookup-procedure"
 181   (let* ((s1 (shepherd-service (provision '(s1 s1b)) (start #f)))
 182          (s2 (shepherd-service (provision '(s2 s2b)) (start #f)))
 183          (s3 (shepherd-service (provision '(s3 s3b s3c)) (start #f)))
 184          (lookup (shepherd-service-lookup-procedure (list s1 s2 s3))))
 185     (and (eq? (lookup 's1) (lookup 's1b) s1)
 186          (eq? (lookup 's2) (lookup 's2b) s2)
 187          (eq? (lookup 's3) (lookup 's3b) s3))))
 188
 189 (test-assert "shepherd-service-back-edges"
 190   (let* ((s1 (shepherd-service (provision '(s1)) (start #f)))
 191          (s2 (shepherd-service (provision '(s2))
 192                                (requirement '(s1))
 193                                (start #f)))
 194          (s3 (shepherd-service (provision '(s3))
 195                                (requirement '(s1 s2))
 196                                (start #f)))
 197          (e  (shepherd-service-back-edges (list s1 s2 s3))))
 198     (and (lset= eq? (e s1) (list s2 s3))
 199          (lset= eq? (e s2) (list s3))
 200          (null? (e s3)))))
 201
 202 (test-equal "shepherd-service-upgrade: nothing to do"
 203   '(() ())
 204   (call-with-values
 205       (lambda ()
 206         (shepherd-service-upgrade '() '()))
 207     list))
 208
 209 (test-equal "shepherd-service-upgrade: one unchanged, one upgraded, one new"
 210   '(()                                            ;unload
 211     ((foo)))                                      ;restart
 212   (call-with-values
 213       (lambda ()
 214         ;; Here 'foo' is replaced and must be explicitly restarted later
 215         ;; because it is still running, whereas 'bar' is upgraded right away
 216         ;; because it is not currently running.  'baz' is loaded because it's
 217         ;; a new service.
 218         (shepherd-service-upgrade
 219          (list (live-service '(foo) '() #t)
 220                (live-service '(bar) '() #f)
 221                (live-service '(root) '() #t))     ;essential!
 222          (list (shepherd-service (provision '(foo))
 223                                  (start #t))
 224                (shepherd-service (provision '(bar))
 225                                  (start #t))
 226                (shepherd-service (provision '(baz))
 227                                  (start #t)))))
 228     (lambda (unload restart)
 229       (list (map live-service-provision unload)
 230             (map shepherd-service-provision restart)))))
 231
 232 (test-equal "shepherd-service-upgrade: service depended on is not unloaded"
 233   '(((baz))                                       ;unload
 234     ((foo)))                                      ;restart
 235   (call-with-values
 236       (lambda ()
 237         ;; Service 'bar' is not among the target services; yet, it must not be
 238         ;; unloaded because 'foo' depends on it.  'foo' gets replaced but it
 239         ;; must be restarted manually.
 240         (shepherd-service-upgrade
 241          (list (live-service '(foo) '(bar) #t)
 242                (live-service '(bar) '() #t)       ;still used!
 243                (live-service '(baz) '() #t))
 244          (list (shepherd-service (provision '(foo))
 245                                  (start #t)))))
 246     (lambda (unload restart)
 247       (list (map live-service-provision unload)
 248             (map shepherd-service-provision restart)))))
 249
 250 (test-equal "shepherd-service-upgrade: obsolete services that depend on each other"
 251   '(((foo) (bar) (baz))                           ;unload
 252     ())                                           ;restart
 253   (call-with-values
 254       (lambda ()
 255         ;; 'foo', 'bar', and 'baz' depend on each other, but all of them are
 256         ;; obsolete, and thus should be unloaded.
 257         (shepherd-service-upgrade
 258          (list (live-service '(foo) '(bar) #t)    ;obsolete
 259                (live-service '(bar) '(baz) #t)    ;obsolete
 260                (live-service '(baz) '() #t))      ;obsolete
 261          (list (shepherd-service (provision '(qux))
 262                                  (start #t)))))
 263     (lambda (unload restart)
 264       (list (map live-service-provision unload)
 265             (map shepherd-service-provision restart)))))
 266
 267 (test-eq "lookup-service-types"
 268   system-service-type
 269   (and (null? (lookup-service-types 'does-not-exist-at-all))
 270        (match (lookup-service-types 'system)
 271          ((one) one)
 272          (x x))))
 273
 274 (test-end)