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;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2015-2019, 2022 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))
(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 "instantiate-missing-services"
(let* ((t1 (service-type (name 't1) (extensions '())
(default-value 'dflt)
(compose concatenate)
(extend cons)))
(t2 (service-type (name 't2)
(extensions
(list (service-extension t1 list)))))
(s1 (service t1 'hey!))
(s2 (service t2 42)))
(and (lset= equal?
(list (service t1) s2)
(instantiate-missing-services (list s2)))
(equal? (list s1 s2)
(instantiate-missing-services (list s1 s2))))))
(test-assert "instantiate-missing-services, indirect"
(let* ((t1 (service-type (name 't1) (extensions '())
(default-value 'dflt)
(compose concatenate)
(extend cons)))
(t2 (service-type (name 't2)
(default-value 'dflt2)
(compose concatenate)
(extend cons)
(extensions
(list (service-extension t1 list)))))
(t3 (service-type (name 't3)
(extensions
(list (service-extension t2 list)))))
(s1 (service t1))
(s2 (service t2))
(s3 (service t3 42))
(== (cut lset= equal? <...>)))
(and (== (list s1 s2 s3)
(instantiate-missing-services (list s3)))
(== (list s1 s2 s3)
(instantiate-missing-services (list s1 s3)))
(== (list s1 s2 s3)
(instantiate-missing-services (list s2 s3))))))
(test-assert "instantiate-missing-services, no default value"
(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))))
(instantiate-missing-services (list s))
#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"
'(() ;unload
((foo))) ;restart
(call-with-values
(lambda ()
;; Here 'foo' is replaced and must be explicitly restarted later
;; because it is still running, whereas 'bar' is upgraded right away
;; because it is not currently running. 'baz' is loaded because it's
;; a new service.
(shepherd-service-upgrade
(list (live-service '(foo) '() #f #t)
(live-service '(bar) '() #f #f)
(live-service '(root) '() #f #t)) ;essential!
(list (shepherd-service (provision '(foo))
(start #t))
(shepherd-service (provision '(bar))
(start #t))
(shepherd-service (provision '(baz))
(start #t)))))
(lambda (unload restart)
(list (map live-service-provision unload)
(map shepherd-service-provision restart)))))
(test-equal "shepherd-service-upgrade: service depended on is not unloaded"
'(((baz)) ;unload
((foo))) ;restart
(call-with-values
(lambda ()
;; Service 'bar' is not among the target services; yet, it must not be
;; unloaded because 'foo' depends on it. 'foo' gets replaced but it
;; must be restarted manually.
(shepherd-service-upgrade
(list (live-service '(foo) '(bar) #f #t)
(live-service '(bar) '() #f #t) ;still used!
(live-service '(baz) '() #f #t))
(list (shepherd-service (provision '(foo))
(start #t)))))
(lambda (unload restart)
(list (map live-service-provision unload)
(map shepherd-service-provision restart)))))
(test-equal "shepherd-service-upgrade: obsolete services that depend on each other"
'(((foo) (bar) (baz)) ;unload
()) ;restart
(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) #f #t) ;obsolete
(live-service '(bar) '(baz) #f #t) ;obsolete
(live-service '(baz) '() #f #t)) ;obsolete
(list (shepherd-service (provision '(qux))
(start #t)))))
(lambda (unload restart)
(list (map live-service-provision unload)
(map shepherd-service-provision restart)))))
(test-equal "shepherd-service-upgrade: transient service"
;; Transient service must not be unloaded:
;; <https://issues.guix.gnu.org/54812>.
'(((foo)) ;unload
((qux))) ;restart
(call-with-values
(lambda ()
(shepherd-service-upgrade
(list (live-service '(sshd-42) '() #t 42) ;transient
(live-service '(foo) '() #f #t) ;obsolete
(live-service '(qux) '() #f #t)) ;running
(list (shepherd-service (provision '(qux))
(start #t)))))
(lambda (unload restart)
(list (map live-service-provision unload)
(map shepherd-service-provision restart)))))
(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)
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