;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2015, 2016, 2017, 2018, 2019 Ludovic Courtès <ludo@gnu.org>
;;;
;;; This file is part of GNU Guix.
;;;
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;;; 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.
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;;; 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.
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;;; 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 '())
                           (de</td></tr></table>
<table class='tabs'><tr><td>
<a href='/haketilo-hydrilla/?h=v3.0-beta1'>summary</a><a href='/haketilo-hydrilla/refs/?h=v3.0-beta1&amp;id=4eb22719e43d1217a7629d5c4d82df7eafb24c68'>refs</a><a href='/haketilo-hydrilla/log/.gitignore?h=v3.0-beta1'>log</a><a href='/haketilo-hydrilla/tree/.gitignore?h=v3.0-beta1&amp;id=4eb22719e43d1217a7629d5c4d82df7eafb24c68'>tree</a><a class='active' href='/haketilo-hydrilla/commit/.gitignore?h=v3.0-beta1&amp;id=4eb22719e43d1217a7629d5c4d82df7eafb24c68'>commit</a><a href='/haketilo-hydrilla/diff/.gitignore?h=v3.0-beta1&amp;id=4eb22719e43d1217a7629d5c4d82df7eafb24c68'>diff</a></td><td class='form'><form class='right' method='get' action='/haketilo-hydrilla/log/.gitignore'>
<input type='hidden' name='h' value='v3.0-beta1'/><input type='hidden' name='id' value='4eb22719e43d1217a7629d5c4d82df7eafb24c68'/><select name='qt'>
<option value='grep'>log msg</option>
<option value='author'>author</option>
<option value='committer'>committer</option>
<option value='range'>range</option>
</select>
<input class='txt' type='search' size='10' name='q' value=''/>
<input type='submit' value='search'/>
</form>
</td></tr></table>
<div class='path'>path: <a href='/haketilo-hydrilla/commit/?h=v3.0-beta1&amp;id=4eb22719e43d1217a7629d5c4d82df7eafb24c68'>root</a>/<a href='/haketilo-hydrilla/commit/.gitignore?h=v3.0-beta1&amp;id=4eb22719e43d1217a7629d5c4d82df7eafb24c68'>.gitignore</a></div><div class='content'><div class='cgit-panel'><b>diff options</b><form method='get'><input type='hidden' name='h' value='v3.0-beta1'/><input type='hidden' name='id' value='4eb22719e43d1217a7629d5c4d82df7eafb24c68'/><table><tr><td colspan='2'/></tr><tr><td class='label'>context:</td><td class='ctrl'><select name='context' onchange='this.form.submit();'><option value='1'>1</option><option value='2'>2</option><option value='3' selected='selected'>3</option><option value='4'>4</option><option value='5'>5</option><option value='6'>6</option><option value='7'>7</option><option value='8'>8</option><option value='9'>9</option><option value='10'>10</option><option value='15'>15</option><option value='20'>20</option><option value='25'>25</option><option value='30'>30</option><option value='35'>35</option><option value='40'>40</option></select></td></tr><tr><td class='label'>space:</td><td class='ctrl'><select name='ignorews' onchange='this.form.submit();'><option value='0' selected='selected'>include</option><option value='1'>ignore</option></select></td></tr><tr><td class='label'>mode:</td><td class='ctrl'><select name='dt' onchange='this.form.submit();'><option value='0' selected='selected'>unified</option><option value='1'>ssdiff</option><option value='2'>stat only</option></select></td></tr><tr><td/><td class='ctrl'><noscript><input type='submit' value='reload'/></noscript></td></tr></table></form></div><table summary='commit info' class='commit-info'>
<tr><th>author</th><td>Wojtek Kosior &lt;koszko@koszko.org&gt;</td><td class='right'>2022-03-02 16:15:07 +0100</td></tr>
<tr><th>committer</th><td>Wojtek Kosior &lt;koszko@koszko.org&gt;</td><td class='right'>2022-03-02 16:15:07 +0100</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/haketilo-hydrilla/commit/.gitignore?h=v3.0-beta1&amp;id=4eb22719e43d1217a7629d5c4d82df7eafb24c68'>4eb22719e43d1217a7629d5c4d82df7eafb24c68</a> (<a href='/haketilo-hydrilla/patch/.gitignore?id=4eb22719e43d1217a7629d5c4d82df7eafb24c68'>patch</a>)</td></tr>
<tr><th>tree</th><td colspan='2' class='oid'><a href='/haketilo-hydrilla/tree/?h=v3.0-beta1&amp;id=4eb22719e43d1217a7629d5c4d82df7eafb24c68'>204da5f08d6cbd5af1a1744505bd56c63ccc436b</a> /<a href='/haketilo-hydrilla/tree/.gitignore?h=v3.0-beta1&amp;id=4eb22719e43d1217a7629d5c4d82df7eafb24c68'>.gitignore</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/haketilo-hydrilla/commit/.gitignore?h=v3.0-beta1&amp;id=1cb6aaae2055283d04aa0aa581e82addb8049ce4'>1cb6aaae2055283d04aa0aa581e82addb8049ce4</a> (<a href='/haketilo-hydrilla/diff/.gitignore?h=v3.0-beta1&amp;id=4eb22719e43d1217a7629d5c4d82df7eafb24c68&amp;id2=1cb6aaae2055283d04aa0aa581e82addb8049ce4'>diff</a>)</td></tr><tr><th>download</th><td colspan='2' class='oid'><a href='/haketilo-hydrilla/snapshot/haketilo-hydrilla-4eb22719e43d1217a7629d5c4d82df7eafb24c68.tar.gz'>haketilo-hydrilla-4eb22719e43d1217a7629d5c4d82df7eafb24c68.tar.gz</a><br/><a href='/haketilo-hydrilla/snapshot/haketilo-hydrilla-4eb22719e43d1217a7629d5c4d82df7eafb24c68.zip'>haketilo-hydrilla-4eb22719e43d1217a7629d5c4d82df7eafb24c68.zip</a><br/></td></tr></table>
<div class='commit-subject'>mention PyPI freedom issues in README</div><div class='commit-msg'></div><div class='diffstat-header'><a href='/haketilo-hydrilla/diff/?h=v3.0-beta1&amp;id=4eb22719e43d1217a7629d5c4d82df7eafb24c68'>Diffstat</a> (limited to '.gitignore')</div><table summary='diffstat' class='diffstat'></table><div class='diffstat-summary'>0 files changed, 0 insertions, 0 deletions</div><table summary='diff' class='diff'><tr><td></td></tr></table></div> <!-- class=content -->
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     (== (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) '() #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 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) #t)
               (live-service '(bar) '() #t)       ;still used!
               (live-service '(baz) '() #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) #t)    ;obsolete
               (live-service '(bar) '(baz) #t)    ;obsolete
               (live-service '(baz) '() #t))      ;obsolete
         (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)