Bug 34266: Add unit tests

Bug 34266: Add unit tests

Signed-off-by: joubu <xxx@example.org>
Signed-off-by: tuxayo <victor@tuxayo.net>
Took the opportunity to perltidy this file as I was signing off

Signed-off-by: Chris Cormack <chris@bigballofwax.co.nz>
Signed-off-by: Marcel de Rooy <m.de.rooy@rijksmuseum.nl>
[EDIT] Added a rollback. Shouldnt harm :)
Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>
(cherry picked from commit a3d0e443ce7a90687077c73b5d5a7116d4401d71)
Signed-off-by: Fridolin Somers <fridolin.somers@biblibre.com>