added a test for the behavior that shouldn't give nan. It currently fails. Now, to make it pass.
added a test for the behavior that shouldn't give nan. It currently fails. Now,
to make it pass.

rwcarlsen/cyclus,Baaaaam/cyclus,Baaaaam/cyclus,rwcarlsen/cyclus,mbmcgarry/cyclus,gidden/cyclus,mbmcgarry/cyclus,Baaaaam/cyclus,hodger/cyclus,hodger/cyclus,mbmcgarry/cyclus,hodger/cyclus,hodger/cyclus,gidden/cyclus,hodger/cyclus,rwcarlsen/cyclus,gidden/cyclus,gidden/cyclus,rwcarlsen/cyclus,mbmcgarry/cyclus