Update tests with new which enum
Update tests with new which enum

jparyani/pycapnp,rcrowder/pycapnp,tempbottle/pycapnp,tempbottle/pycapnp,SymbiFlow/pycapnp,jparyani/pycapnp,jparyani/pycapnp,SymbiFlow/pycapnp,SymbiFlow/pycapnp,jparyani/pycapnp,rcrowder/pycapnp,rcrowder/pycapnp,tempbottle/pycapnp,rcrowder/pycapnp,SymbiFlow/pycapnp,tempbottle/pycapnp