[DNM]: test

[lidezhu]

What problem does this PR solve?

Issue Number: close #xxx

What is changed and how it works?

Check List

Tests

• Unit test
• Integration test
• Manual test (add detailed scripts or steps below)
• No code

Questions

Will it cause performance regression or break compatibility?

Do you need to update user documentation, design documentation or monitoring documentation?

Release note

Please refer to [Release Notes Language Style Guide](https://pingcap.github.io/tidb-dev-guide/contribute-to-tidb/release-notes-style-guide.html) to write a quality release note.

If you don't think this PR needs a release note then fill it with `None`.

[ti-chi-bot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

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[sre-bot]

Thank you for your submission! We really appreciate it. Like many open source projects, we ask that you all sign our Contributor License Agreement before we can accept your contribution.
1 out of 2 committers have signed the CLA.

✅ lidezhu
❌ linkmyth

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[codecov]

Codecov Report

Attention: Patch coverage is 95.45455% with 1 line in your changes missing coverage. Please review.

Project coverage is 57.6434%. Comparing base (2db0922) to head (8c17771).
Report is 6 commits behind head on master.

Additional details and impacted files

Components	Coverage Δ
cdc	61.4820% <95.4545%> (+0.0196%)	⬆️
dm	51.1809% <ø> (-0.0222%)	⬇️
engine	63.3738% <ø> (+0.0211%)	⬆️

Flag	Coverage Δ
unit	57.6434% <95.4545%> (+0.0040%)	⬆️

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

@@               Coverage Diff                @@
##             master     #11369        +/-   ##
================================================
+ Coverage   57.6393%   57.6434%   +0.0040%     
================================================
  Files           849        849                
  Lines        126162     126186        +24     
================================================
+ Hits          72719      72738        +19     
- Misses        48042      48050         +8     
+ Partials       5401       5398         -3     

[ti-chi-bot]

[FORMAT CHECKER NOTIFICATION]

Notice: To remove the do-not-merge/needs-linked-issue label, please provide the linked issue number on one line in the PR body, for example: Issue Number: close #123 or Issue Number: ref #456.

_{📖 For more info, you can check the "Contribute Code" section in the development guide.}

[ti-chi-bot]

@lidezhu: The following tests failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name	Commit	Details	Required	Rerun command
pull-cdc-integration-mysql-test	8c17771	link	true	/test cdc-integration-mysql-test
pull-cdc-integration-kafka-test	8c17771	link	true	/test cdc-integration-kafka-test

Full PR test history. Your PR dashboard.

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[ti-chi-bot]

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/test-infra repository.