Add unit tests for Flow Aggregator API handlers

[yanjunz97]

For #4142

Signed-off-by: Yanjun Zhou zhouya@vmware.com

[codecov]

Codecov Report

Merging #4179 (7e03a54) into main (222c2b6) will decrease coverage by 6.19%.
The diff coverage is 0.00%.

@@            Coverage Diff             @@
##             main    #4179      +/-   ##
==========================================
- Coverage   66.31%   60.12%   -6.20%     
==========================================
  Files         304      380      +76     
  Lines       46613    53791    +7178     
==========================================
+ Hits        30911    32341    +1430     
- Misses      13296    19036    +5740     
- Partials     2406     2414       +8     

Flag	Coverage Δ
integration-tests	34.97% <ø> (+0.07%)	⬆️
kind-e2e-tests	49.09% <0.00%> (-0.16%)	⬇️
unit-tests	41.18% <0.00%> (-4.07%)	⬇️

Impacted Files	Coverage Δ
...egator/apiserver/handlers/recordmetrics/handler.go	68.00% <0.00%> (+28.00%)	⬆️
...nt/apiserver/handlers/serviceexternalip/handler.go	37.03% <0.00%> (-14.82%)	⬇️
pkg/agent/flowexporter/utils.go	72.34% <0.00%> (-8.52%)	⬇️
pkg/controller/networkpolicy/tier.go	50.00% <0.00%> (-5.00%)	⬇️
pkg/agent/util/ipset/ipset.go	69.23% <0.00%> (-2.57%)	⬇️
pkg/controller/networkpolicy/store/addressgroup.go	88.37% <0.00%> (-2.33%)	⬇️
pkg/controller/grouping/controller.go	65.13% <0.00%> (-1.98%)	⬇️
pkg/agent/controller/networkpolicy/reconciler.go	70.27% <0.00%> (-1.94%)	⬇️
pkg/controller/networkpolicy/status_controller.go	68.56% <0.00%> (-1.14%)	⬇️
pkg/agent/ipassigner/ip_assigner_linux.go	55.97% <0.00%> (-1.09%)	⬇️
... and 142 more

[tnqn]

LGTM, thanks

[tnqn]

/skip-all