UT: Increase unit test coverage of pkg/bootstrap

[Charlie17Li]

Signed-off-by: charlie qianglin98@qq.com

Ⅰ. Describe what this PR did

unit Test: Increase unit test coverage of pkg/bootstrap

Ⅱ. Does this pull request fix one issue?

fixes #83

Ⅲ. Why don't you add test cases (unit test/integration test)?

Ⅳ. Describe how to verify it

Ⅴ. Special notes for reviews

➜  bootstrap git:(UT/bootstrap) go test -coverprofile=size_coverage.out
2022-12-07T05:57:50.295408Z     info    init xds server
2022-12-07T05:57:50.295636Z     info    ingress Skipping IngressClass, resource not supported for cluster 
2022-12-07T05:57:50.295660Z     info    ingress Disable status update for cluster 
2022-12-07T05:57:50.295704Z     info    initializing registry event handlers
2022-12-07T05:57:50.295711Z     info    ingress register resource networking.istio.io/v1alpha3/DestinationRule
2022-12-07T05:57:50.295718Z     info    ingress register resource networking.istio.io/v1alpha3/EnvoyFilter
2022-12-07T05:57:50.295721Z     info    ingress register resource networking.istio.io/v1alpha3/Gateway
2022-12-07T05:57:50.295724Z     info    ingress register resource networking.istio.io/v1alpha3/VirtualService
2022-12-07T05:57:50.295730Z     info    Starting ADS server
2022-12-07T05:57:50.296284Z     info    Waiting for caches to be synced
2022-12-07T05:57:50.296305Z     info    ingress Ingress config controller synced.
2022-12-07T05:57:50.296313Z     info    All controller caches have been synced up in 27.605µs
2022-12-07T05:57:50.296335Z     info    ads     All caches have been synced up in 1.768974ms, marking server ready
PASS
2022-12-07T05:57:50.296615Z     info    starting gRPC discovery service at [::]:15051
2022-12-07T05:57:50.296664Z     error   ingress Failed to sync ingress controller cache for cluster 
2022-12-07T05:57:50.296679Z     info    starting HTTP service at [::]:8888
2022-12-07T05:57:50.296674Z     error   ingress Failed to sync secret controller cache
coverage: 71.0% of statements
ok      github.com/alibaba/higress/pkg/bootstrap        1.094s

[CLAassistant]

All committers have signed the CLA.

[SpecialYang]

Can you add License for the new added unit test file.

[codecov-commenter]

Codecov Report

Merging #101 (a3f7d3c) into main (4776d62) will increase coverage by 1.99%.
The diff coverage is 40.00%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #101      +/-   ##
==========================================
+ Coverage   25.02%   27.02%   +1.99%     
==========================================
  Files          24       25       +1     
  Lines        4076     4326     +250     
==========================================
+ Hits         1020     1169     +149     
- Misses       2999     3081      +82     
- Partials       57       76      +19     

Impacted Files	Coverage Δ
pkg/bootstrap/server.go	59.60% <40.00%> (ø)

[johnlanni]

@Charlie17Li There are some conflicts that need to be resolved.

[Charlie17Li]

Can you add License for the new added unit test file.

ok

[Charlie17Li]

@Charlie17Li There are some conflicts that need to be resolved.

ok

already done