chore: Add unit tests

[mowangdk]

What type of PR is this?

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

/kind enhancement

What this PR does / why we need it:

Add unit test

Which issue(s) this PR fixes:

None

Special notes for your reviewer:

None

Does this PR introduce a user-facing change?

other Note

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In response to this:

What type of PR is this?

Uncomment only one /kind <> line, hit enter to put that in a new line, and remove leading whitespace from that line:
/kind bug
/kind documentation
/kind enhancement
/kind good-first-issue
/kind feature
/kind question
/kind design
/sig ai
/sig iot
/sig network
/sig storage
/sig storage

/kind enhancement

What this PR does / why we need it:

Add unit test

Which issue(s) this PR fixes:

None

Special notes for your reviewer:

None

Does this PR introduce a user-facing change?

other Note

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[openyurt-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: mowangdk

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[codecov]

Codecov Report

Merging #14 (27eaa26) into main (27ca36c) will decrease coverage by 7.39%.
The diff coverage is 100.00%.

❗ Current head 27eaa26 differs from pull request most recent head a33a23f. Consider uploading reports for the commit a33a23f to get more accurate results

@@            Coverage Diff             @@
##             main      #14      +/-   ##
==========================================
- Coverage   23.47%   16.08%   -7.39%     
==========================================
  Files           4       11       +7     
  Lines         639     1374     +735     
==========================================
+ Hits          150      221      +71     
- Misses        462     1124     +662     
- Partials       27       29       +2     

Flag	Coverage Δ
unittests	16.08% <100.00%> (-7.39%)	⬇️

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

Impacted Files	Coverage Δ
pkg/config/cloud.go	100.00% <100.00%> (ø)
pkg/utils/pmem.go	0.00% <0.00%> (ø)
pkg/utils/utils.go	19.49% <0.00%> (ø)
pkg/utils/lvm.go	0.00% <0.00%> (ø)
pkg/model/type.go	11.40% <0.00%> (ø)
pkg/err/errors.go	100.00% <0.00%> (ø)
pkg/utils/mounter.go	0.00% <0.00%> (ø)

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[mowangdk]

/test