tests: dispatcher: utils: Add None value use-case

Add the use-case of a value equals to None.

Signed-off-by: Mylène Josserand <mylene.josserand@collabora.com>
18 jobs for master-test_strings_improvement in 20 minutes and 28 seconds (queued for 3 seconds)
latest
Status Job ID Name Coverage
  Test
passed #110636
amd64
dispatcher-debian-10

00:02:33

passed #110638
amd64
dispatcher-debian-11

00:03:11

passed #110637
amd64
server-debian-10

00:03:00

passed #110639
amd64
server-debian-11

00:05:06

 
  Analyze
failed #110640
amd64-dind allowed to fail
bandit-sast

passed #110641
amd64
black

00:00:38

passed #110642
amd64
code_quality

00:00:21

passed #110647
amd64
codespell

00:00:23

passed #110643
amd64
coverage

00:06:31

61.73%
passed #110644
amd64
dockerfiles

00:00:14

passed #110646
amd64
pylint

00:02:58

passed #110645
amd64
schemas

00:00:27

 
  Build
passed #110649
amd64
debian/10

00:01:06

passed #110648
amd64
doc

00:00:38

passed #114746
amd64-dind
docker-amd64-dispatcher

00:07:14

passed #114747
amd64-dind
docker-amd64-server

00:07:30

failed #110650
amd64-dind
docker-amd64-dispatcher

failed #110651
amd64-dind
docker-amd64-server

 
Name Stage Failure
failed
bandit-sast Analyze There has been a timeout failure or the job got stuck. Check your timeout limits or try again
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