add yurtingress controller unit test

[rudolf-chy]

What type of PR is this?

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/kind bug
/kind documentation
/kind enhancement
/kind good-first-issue
/kind feature
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/sig ai
/sig iot
/sig network
/sig storage
/sig storage

What this PR does / why we need it:

Which issue(s) this PR fixes:

Fixes #

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Does this PR introduce a user-facing change?

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[zzguang]

@Rudolf1998 , the current unit test coverage is only about 18.8% basing on your PR, which can not meet the 70% target, could you please optimize it to improve the ratio? thanks!
$go test ./pkg/yurtappmanager/controller/yurtingress/... --covermode=count
ok github.com/openyurtio/yurt-app-manager/pkg/yurtappmanager/controller/yurtingress (cached) coverage: 18.8% of statements

[kadisi]

@Rudolf1998 , the current unit test coverage is only about 18.8% basing on your PR, which can not meet the 70% target, could you please optimize it to improve the ratio? thanks! $go test ./pkg/yurtappmanager/controller/yurtingress/... --covermode=count ok github.com/openyurtio/yurt-app-manager/pkg/yurtappmanager/controller/yurtingress (cached) coverage: 18.8% of statements

@zzguang I think 70% test coverage for the entire yurt-app-manager repo is enough, and some unit tests will need mock tests, which we can implement uniformly later.

[zzguang]

@Rudolf1998 , the current unit test coverage is only about 18.8% basing on your PR, which can not meet the 70% target, could you please optimize it to improve the ratio? thanks! $go test ./pkg/yurtappmanager/controller/yurtingress/... --covermode=count ok github.com/openyurtio/yurt-app-manager/pkg/yurtappmanager/controller/yurtingress (cached) coverage: 18.8% of statements

@zzguang I think 70% test coverage for the entire yurt-app-manager repo is enough, and some unit tests will need mock tests, which we can implement uniformly later.

Okay, agree with you to implement the mock test in future.

[kadisi]

/approve

[zzguang]

/lgtm

[codecov]

Codecov Report

Merging #85 (12f13bc) into master (4fd0202) will increase coverage by 1.55%.
The diff coverage is n/a.

@@            Coverage Diff            @@
##           master     #85      +/-   ##
=========================================
+ Coverage    7.78%   9.34%   +1.55%     
=========================================
  Files          17      18       +1     
  Lines        1901    2258     +357     
=========================================
+ Hits          148     211      +63     
- Misses       1724    2010     +286     
- Partials       29      37       +8     

Flag	Coverage Δ
unittests	9.34% <ø> (+1.55%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
...r/controller/yurtingress/yurtingress_controller.go	17.64% <0.00%> (ø)

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[kadisi]

@Rudolf1998 please check ci/golangci-lint error info .

[zzguang]

/lgtm

[Congrool]

Fixes #76

[zzguang]

/approve

[openyurt-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: kadisi, Rudolf1998, zzguang

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