[bug#38429] [PATCH 4/5] scron: add system test

[Robert Vollmert <rob@vllmrt.net>]

I’ve checked that the tests compile, and run the test cron jobs
by hand to ensure they behave as tested, but I wasn’t able to run
the system tests themselves.

> On 3. Dec 2019, at 13:46, Robert Vollmert <rob@vllmrt.net> wrote:
> 
> ---
> gnu/tests/base.scm | 86 ++++++++++++++++++++++++++++++++++++++++++++++
> 1 file changed, 86 insertions(+)
> 
> diff --git a/gnu/tests/base.scm b/gnu/tests/base.scm
> index a891711844..b80e77be66 100644
> --- a/gnu/tests/base.scm
> +++ b/gnu/tests/base.scm
> @@ -28,6 +28,7 @@
>   #:use-module (gnu services dbus)
>   #:use-module (gnu services avahi)
>   #:use-module (gnu services mcron)
> +  #:use-module (gnu services scron)
>   #:use-module (gnu services shepherd)
>   #:use-module (gnu services networking)
>   #:use-module (gnu packages base)
> @@ -48,6 +49,7 @@
>             %test-halt
>             %test-cleanup
>             %test-mcron
> +            %test-scron
>             %test-nss-mdns))
> 
> (define %simple-os
> @@ -720,6 +722,90 @@ non-ASCII names from /tmp.")
>    (description "Make sure the mcron service works as advertised.")
>    (value (run-mcron-test name))))
> 
> +\f
> +;;;
> +;;; Scron.
> +;;;
> +
> +(define %scron-os
> +  ;; System with an scron service, with one scron job for "root" and one scron
> +  ;; job for an unprivileged user.
> +  (let ((job1
> +         (scron-job
> +          (schedule "* * * * *")
> +          (command  "(id -u; id -g) > witness")))
> +        (job2
> +         (scron-job
> +          (schedule "* * * * *")
> +          (command  "su -c '(id -u; id -g) > ~/witness' alice")))
> +        (job3
> +         (scron-job
> +          (schedule "* * * * *")
> +          (command  "touch witness-touch"))))
> +    (simple-operating-system
> +     (service scron-service-type
> +              (scron-configuration (jobs (list job1 job2 job3)))))))
> +
> +(define (run-scron-test name)
> +  (define os
> +    (marionette-operating-system
> +     %scron-os
> +     #:imported-modules '((gnu services herd)
> +                          (guix combinators))))
> +
> +  (define test
> +    (with-imported-modules '((gnu build marionette))
> +      #~(begin
> +          (use-modules (gnu build marionette)
> +                       (srfi srfi-64)
> +                       (ice-9 match))
> +
> +          (define marionette
> +            (make-marionette (list #$(virtual-machine os))))
> +
> +          (mkdir #$output)
> +          (chdir #$output)
> +
> +          (test-begin "scron")
> +
> +          (test-assert "service running"
> +            (marionette-eval
> +             '(begin
> +                (use-modules (gnu services herd))
> +                (start-service 'scron))
> +             marionette))
> +
> +          ;; Make sure root's scron job runs, has its cwd set to "/", and
> +          ;; runs with the right UID/GID.
> +          (test-equal "root's job"
> +            '(0 0)
> +            (wait-for-file "/witness" marionette))
> +
> +          ;; Likewise for Alice's job.  We cannot know what its GID is since
> +          ;; it's chosen by 'groupadd', but it's strictly positive.
> +          (test-assert "alice's job"
> +            (match (wait-for-file "/home/alice/witness" marionette)
> +              ((1000 gid)
> +               (>= gid 100))))
> +
> +          ;; Last, the job that uses a command; allows us to test whether
> +          ;; $PATH is sane.
> +          (test-equal "root's job with command"
> +            ""
> +            (wait-for-file "/witness-touch" marionette
> +                           #:read '(@ (ice-9 rdelim) read-string)))
> +
> +          (test-end)
> +          (exit (= (test-runner-fail-count (test-runner-current)) 0)))))
> +
> +  (gexp->derivation name test))
> +
> +(define %test-scron
> +  (system-test
> +   (name "scron")
> +   (description "Make sure the scron service works as advertised.")
> +   (value (run-scron-test name))))
> +
> 
> ;;;
> ;;; Avahi and NSS-mDNS.
> -- 
> 2.24.0
>