You open the Generation dialog box in Qsys by clicking .
Qsys testbench is a new system that instantiates the current
Qsys system by adding BFMs to drive the top-level interfaces. BFMs
interact with the system in the simulator.
Note: For more information about generating a
testbench system, refer to the Creating a System in Qsys chapter in volume
1 of the Quartus® Prime Standard Edition Handbook,
and theSimulating Altera Designs chapter in volume 3 of the
Quartus® Prime Standard Edition
Handbook.