Improve Test Coverage and Handle Edge Cases in value_from_test.

[joeyyy09]

What type of PR is this?

/kind feature

What this PR does / why we need it:

This PR improves test coverage and handles edge cases in the value_from_test.go file.

Which issue(s) this PR fixes:

Fixes #

Special notes for your reviewer:

This PR focuses on enhancing test coverage and addressing edge cases in the value_from_test.go file.

Does this PR introduce a user-facing change?

NONE

Additional documentation e.g., KEPs (Kubernetes Enhancement Proposals), usage docs, etc.:

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: joeyyy09
Once this PR has been reviewed and has the lgtm label, please assign yibozhuang for approval. For more information see the Kubernetes Code Review Process.

The full list of commands accepted by this bot can be found here.

Needs approval from an approver in each of these files:

• OWNERS

Approvers can indicate their approval by writing /approve in a comment
Approvers can cancel approval by writing /approve cancel in a comment

[k8s-ci-robot]

Hi @joeyyy09. Thanks for your PR.

I'm waiting for a kubernetes-sigs member to verify that this patch is reasonable to test. If it is, they should reply with /ok-to-test on its own line. Until that is done, I will not automatically test new commits in this PR, but the usual testing commands by org members will still work. Regular contributors should join the org to skip this step.

Once the patch is verified, the new status will be reflected by the ok-to-test label.

I understand the commands that are listed here.

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes-sigs/prow repository.

[netlify]

✅ Deploy Preview for k8s-kwok canceled.

Name	Link
🔨 Latest commit	cd1c054
🔍 Latest deploy log	https://app.netlify.com/sites/k8s-kwok/deploys/665d91600e6452000818d6ab

[wzshiming]

Could you add some cases where both value and src are present?

[joeyyy09]

Could you add some cases where both value and src are present?

yeah sure, will look into it.

[k8s-ci-robot]

PR needs rebase.

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes-sigs/prow repository.