Add tests for source filtering.
Add tests for source filtering.

sjakobi/bloodhound,bitemyapp/bloodhound,jasonzoladz/bloodhound,Soostone/bloodhound,superduper/bloodhound,beni55/bloodhound,krystalcode/bloodhound,bermanjosh/bloodhound,sjfloat/bloodhound,silkapp/bloodhound