Adding testcase in verification planner

Hi,

I need to map a testcase to a feature and get its coverage once the mapped testcase passes.
Incase of coverpoint i include it as group: comp_lib_pkg::tx_cov::cgp_pkt.cp_dly
Similarly how can i map a testcase for a feature?
Kindly help me out with the syntax of how to add a testcase to my testplan and annotate it with the result.
Thanks in advance.