Improve the unit test coverage for portcache

[jainpulkit22]

Added unit test for pkg/agent/nodeportlocal/portcahce package.

For #4142

Signed-off-by: Pulkit Jain [email protected]

[codecov[bot]]

Codecov Report

Merging #4284 (2686845) into main (d9b2e37) will increase coverage by 0.84%. The diff coverage is n/a.

@@            Coverage Diff             @@
##             main    #4284      +/-   ##
==========================================
+ Coverage   64.52%   65.36%   +0.84%     
==========================================
  Files         402      402              
  Lines       57238    57238              
==========================================
+ Hits        36932    37416     +484     
+ Misses      17594    17117     -477     
+ Partials     2712     2705       -7     

Flag	Coverage Δ
integration-tests	34.66% <ø> (-0.06%)	:arrow_down:
kind-e2e-tests	46.32% <ø> (+5.00%)	:arrow_up:
unit-tests	51.04% <ø> (+0.13%)	:arrow_up:

Impacted Files	Coverage Δ
...g/agent/apiserver/handlers/featuregates/handler.go	4.54% <0.00%> (-77.28%)	:arrow_down:
pkg/support/dump_others.go	0.00% <0.00%> (-44.74%)	:arrow_down:
...g/agent/apiserver/handlers/addressgroup/handler.go	5.00% <0.00%> (-35.00%)	:arrow_down:
pkg/agent/apiserver/handlers/agentinfo/handler.go	40.00% <0.00%> (-31.12%)	:arrow_down:
...agent/controller/traceflow/traceflow_controller.go	53.57% <0.00%> (-19.39%)	:arrow_down:
pkg/ipfix/ipfix_process.go	81.25% <0.00%> (-18.75%)	:arrow_down:
pkg/agent/controller/networkpolicy/reject.go	60.59% <0.00%> (-12.32%)	:arrow_down:
pkg/agent/util/iptables/iptables.go	39.37% <0.00%> (-10.89%)	:arrow_down:
pkg/agent/apiserver/handlers/multicast/handler.go	69.76% <0.00%> (-9.31%)	:arrow_down:
pkg/agent/apiserver/apiserver.go	71.27% <0.00%> (-5.32%)	:arrow_down:
... and 60 more

[tnqn]

/skip-all