[CS] Add test for Calls#first
[CS] Add test for Calls#first
renemendoza/adhearsion,renemendoza/adhearsion,cloudvox/adhearsion,adhearsion/adhearsion,cloudvox/adhearsion,cloudvox/adhearsion,adhearsion/adhearsion,renemendoza/adhearsion,jicksta/adhearsion,kares/adhearsion,adhearsion/adhearsion,cloudvox/adhearsion,kares/adhearsion,adhearsion/adhearsion