Bug 27784: Unit tests

Bug 27784: Unit tests

Signed-off-by: David Nind <david@davidnind.com>
Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>
(cherry picked from commit 5e0dbf0adb63818b08ee77843706255dcaf00051)
Signed-off-by: Fridolin Somers <fridolin.somers@biblibre.com>
(cherry picked from commit e16cd2afc5a2e651ab3b0bf9ab2ff8c40f3c169f)

Signed-off-by: Andrew Fuerste-Henry <andrew@bywatersolutions.com>
(cherry picked from commit 9dda7ba2d37293e962819c9755aa867cbfa6681d)
Signed-off-by: Victor Grousset/tuxayo <victor@tuxayo.net>