Even though the EvtGen master branch contains at least one JSON test for every decay model class, we could potentially extend the testing to include as many of the decay modes as possible, e.g. a model can handle 10 modes, with different max probabilities and parameters, but only has a test for 1 of them.

This is related also with T229 (tests for decays with FSR), and #14 (tests for xml decay files).