run_test question about uvm_test_top parent instance path

[Robert.g.Liu]

Any reason when creating the uvm_test_top using the factory method in run_test, the parent_inst_path parameter of uvm_factory::create_component_by_name has the argument value "uvm_test_top", resulting in a "uvm_test_top.uvm_test_top" instance path for this component inside the factory method?

$cast(uvm_test_top, factory.create_component_by_name(test_name,

"uvm_test_top", "uvm_test_top", null));

It seems to make more sense to just make the parent_inst_path argument an empty string when calling the factory method for creating the uvm_test_top component.

$cast(uvm_test_top, factory.create_component_by_name(test_name,

"", "uvm_test_top", null));