Bug 22781: Add tests

Bug 22781: Add tests

Test plan:
Apply only this patch
=> The tests will fail, the library's name is not correctly escaped.

Note:
This applies for the whole patchset, when the tests fail you will need
to remove the patrons added by the tests with the following SQL query:
  delete from borrowers where surname like "test_patron_%";
We are expecting END to be called even if something goes wrong, but
DESTROY must be used instead. This will be fixed separately, on its own
bug report.

Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>

Signed-off-by: Nick Clemens <nick@bywatersolutions.com>