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services: shepherd: Add 'shepherd-service-upgrade', from 'guix system'.

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* guix/scripts/system.scm (service-upgrade): Move to...
* gnu/services/shepherd.scm (shepherd-service-upgrade): ... here.
* tests/system.scm ("service-upgrade: nothing to do", "service-upgrade:
one unchanged, one upgraded, one new", "service-upgrade: service
depended on is not unloaded", "service-upgrade: obsolete services that
depend on each other"): Move to...
* tests/services.scm: ... here.  Adjust to 'service-upgrade' rename.
This commit is contained in:
Ludovic Courtès 2016-08-31 15:40:00 +02:00
parent d4f8884fdb
commit 7b44cae50a
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4 changed files with 121 additions and 118 deletions
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68
tests/services.scm
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@ -18,12 +18,17 @@
(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))
(define live-service
(@@ (gnu services herd) live-service))
(test-begin "services")
(test-assert "service-back-edges"
@ -127,4 +132,67 @@
(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-end)