Bug 21962: Unit tests

Bug 21962: Unit tests

Signed-off-by: Pierre-Marc Thibault <pierre-marc.thibault@inLibro.com>

Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>

Signed-off-by: Nick Clemens <nick@bywatersolutions.com>
(cherry picked from commit 39c93e87f648978ec7907220710efaf64e556ea0)
Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>
(cherry picked from commit d6b7e00b9cd04e15c472b2f7b075d85886ffa3e5)
(cherry picked from commit f9a4e3656102d982923989ce49641ff0a267322f)
Signed-off-by: Fridolin Somers <fridolin.somers@biblibre.com>