Add comments to TestShouldRestoreMetadata in pkg\ddc\alluxio\metadata_test.go

[leowhr]

Ⅰ. Describe what this PR does

Add comments to the function TestShouldRestoreMetadata.

Ⅱ. Does this pull request fix one issue?

fixes #4658

Ⅲ. List the added test cases (unit test/integration test) if any, please explain if no tests are needed.

No tests are needed, as I just added a comment.

Ⅳ. Describe how to verify it

None.

Ⅴ. Special notes for reviews

None.

[fluid-e2e-bot]

Hi @leowhr. Thanks for your PR.

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[JiGuoDing]

Hello @leowhr, please fix the DCO Issue by following https://github.com/fluid-cloudnative/fluid/pull/4659/checks?check_run_id=38715733145.

Moreover, please use // for comments instead of /**/. Thanks.

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
100.0% Duplication on New Code

See analysis details on SonarQube Cloud

[leowhr]

Hello @JiGuoDing , I've updated the code based on your feedback. Please review it again.

[cheyang]

/lgtm
/approve

[fluid-e2e-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: cheyang

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[cheyang]

/ok-to-test