Unit tests for set logic

[juliangruendner]

Unit tests, which test the set and combination logic of should be added.

This includes
inclusion with AND and OR
exclusion with OR and AND

The tests should always be structured in a way to test all paths
for example:

incl: crit1
incl: crit1 AND crit2
incl: crti1 AND (crit2 OR crit 3)

incl: crit1 , excl: crit2
incl: crit1, excl: crit2 OR (crit3)
incl: crit1, excl: crti2 OR (crit3 AND crit4)

etc...