We currently have a quite low test coverage in the PETSc radial-basis function mapping.

To be more precise, we only test the Tree preallocation strategy. All remaining strategies Compute, Save, Estimate, None are not tested at all.

See the file on [CodeCov](https://codecov.io/gh/precice/prec

When running parallel cases with the adapter, it just prints the number of interface nodes/faces on rank 0.
Hence, in larger

Currently PADE mix behaviours and protocols in a same file located in /pade/behaviours/protocols.py.

The idea is split behaviours and protocols in different files.

Once #61 is merged, serialization of the state functions should be tested using FMPy.

Maybe other stuff like the XML could be checked too.

Describe the bug
The pi-exchange examples for different languages have differences in implementation that make some of them behave differently.

What is the expected behavior?
The pi-exchange federates written in different languages should be drop in replacements for each other when running examples. A pisender written in Python should work with a pireceiver written in C.

The HELICS helper SetupFederate function currently creates a new federate each time it gets called. There should be a check to see if it has already been initialized before creating a new federate.