Write unit tests for isSubVocabulary

[Broes De Cat]

All current unit tests only test the case that both vocabularies are identical.

[Bart Bogaerts]

I cannot find those unit tests you claim ;-)

[Broes De Cat]

I meant that all current unit tests (model expansion, ...) always provide identical vocabularies for their theory, structure, ... They should be generalized.

[Broes De Cat]

Removing milestone: Later (automated comment)