Base class change tests added.
Base class change tests added.

This commmit adds three new tests verifying base class:
* addition,
* removal,
* name change.

Closes #73.

modulexcite/Migrant,rogeralsing/Migrant,antmicro/Migrant,rogeralsing/Migrant,modulexcite/Migrant,antmicro/Migrant