Unit tests for add_to_bundle functionality that prevents bundle nesting.
Test plan
1) Run t/db_dependent/Koha/Item.t
2) The test should fail
3) Apply the second patch
4) Re-run the test and watch it pass.
Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>
Signed-off-by: Marcel de Rooy <m.de.rooy@rijksmuseum.nl>
Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>