add tests

[codecov[bot]]

Codecov Report

Merging #2 (df1c57b) into main (7f1dc2f) will increase coverage by 13.04%. The diff coverage is 53.65%.

@@             Coverage Diff             @@
##             main       #2       +/-   ##
===========================================
+ Coverage   47.93%   60.97%   +13.04%     
===========================================
  Files           8       10        +2     
  Lines         242      246        +4     
===========================================
+ Hits          116      150       +34     
+ Misses        109       72       -37     
- Partials       17       24        +7     

Impacted Files	Coverage Δ
internal/ebpf/map.go	26.66% <25.00%> (-38.34%)	:arrow_down:
internal/ebpf/undrop.go	31.81% <29.41%> (+31.81%)	:arrow_up:
internal/ebpf/drop.go	45.45% <47.05%> (+45.45%)	:arrow_up:
internal/ebpf/detach.go	52.63% <50.00%> (+26.70%)	:arrow_up:
internal/ebpf/new.go	62.50% <62.50%> (ø)
internal/ebpf/wrap.go	62.50% <62.50%> (ø)
internal/ebpf/attach.go	70.00% <100.00%> (+24.28%)	:arrow_up:
internal/ebpf/helpers.go	100.00% <100.00%> (+39.13%)	:arrow_up:
internal/ebpf/testing.go	90.90% <100.00%> (+19.26%)	:arrow_up:
... and 4 more

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