tests: testify the global_config tests

[JmPotato]

Signed-off-by: JmPotato [email protected]

What problem does this PR solve?

Issue Number: ref #4813.

What is changed and how does it work?

Testify the global_config tests.

Check List

Tests

• Unit test
• Integration test

Release note

None.

[ti-chi-bot]

[REVIEW NOTIFICATION]

This pull request has been approved by:

• rleungx

To complete the pull request process, please ask the reviewers in the list to review by filling /cc @reviewer in the comment.
After your PR has acquired the required number of LGTMs, you can assign this pull request to the committer in the list by filling /assign @committer in the comment to help you merge this pull request.

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

Reviewer can indicate their review by submitting an approval review.
Reviewer can cancel approval by submitting a request changes review.

[codecov]

Codecov Report

Merging #5227 (12b955a) into master (2eecaef) will decrease coverage by 0.06%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #5227      +/-   ##
==========================================
- Coverage   75.61%   75.55%   -0.07%     
==========================================
  Files         310      310              
  Lines       30682    30682              
==========================================
- Hits        23201    23181      -20     
- Misses       5485     5506      +21     
+ Partials     1996     1995       -1     

Flag	Coverage Δ
unittests	75.55% <ø> (-0.07%)	⬇️

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

Impacted Files	Coverage Δ
pkg/dashboard/keyvisual/input/core.go	0.00% <0.00%> (-33.34%)	⬇️
pkg/tempurl/tempurl.go	45.00% <0.00%> (-25.00%)	⬇️
server/tso/local_allocator.go	64.86% <0.00%> (-6.76%)	⬇️
server/region_syncer/server.go	83.15% <0.00%> (-4.35%)	⬇️
server/storage/endpoint/meta.go	64.04% <0.00%> (-2.25%)	⬇️
tools/pd-ctl/pdctl/command/operator.go	66.66% <0.00%> (-1.15%)	⬇️
pkg/btree/btree.go	86.26% <0.00%> (-0.97%)	⬇️
server/schedule/operator_controller.go	85.77% <0.00%> (-0.81%)	⬇️
client/base_client.go	79.38% <0.00%> (-0.52%)	⬇️
server/handler.go	52.58% <0.00%> (-0.39%)	⬇️
... and 12 more

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 2eecaef...12b955a. Read the comment docs.

[JmPotato]

/merge

[ti-chi-bot]

@JmPotato: It seems you want to merge this PR, I will help you trigger all the tests:

/run-all-tests

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 ti-community-infra/tichi repository.

[ti-chi-bot]

This pull request has been accepted and is ready to merge.

Commit hash: 12b955a