kv: migrate test framework to testify

[LLThomas]

Signed-off-by: LLThomas [email protected]

What problem does this PR solve?

Issue Number: Ref #4813

What is changed and how does it work?

Just as the title says.

Check List

Tests

• Unit test

Release note

None

[ti-chi-bot]

[REVIEW NOTIFICATION]

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• JmPotato
• nolouch

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[codecov]

Codecov Report

Merging #5111 (0afbe92) into master (e244adb) will decrease coverage by 0.05%.
The diff coverage is n/a.

❗ Current head 0afbe92 differs from pull request most recent head 88472d2. Consider uploading reports for the commit 88472d2 to get more accurate results

@@            Coverage Diff             @@
##           master    #5111      +/-   ##
==========================================
- Coverage   75.58%   75.52%   -0.06%     
==========================================
  Files         308      308              
  Lines       30507    30475      -32     
==========================================
- Hits        23058    23017      -41     
- Misses       5455     5463       +8     
- Partials     1994     1995       +1     

Flag	Coverage Δ
unittests	75.52% <ø> (-0.06%)	⬇️

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

Impacted Files	Coverage Δ
pkg/cache/cache.go	53.57% <0.00%> (-10.72%)	⬇️
server/tso/local_allocator.go	71.62% <0.00%> (-6.76%)	⬇️
server/region_syncer/client.go	79.85% <0.00%> (-5.98%)	⬇️
server/schedule/labeler/rules.go	87.50% <0.00%> (-2.28%)	⬇️
server/tso/tso.go	70.05% <0.00%> (-2.26%)	⬇️
server/schedule/checker/rule_checker.go	78.17% <0.00%> (-1.73%)	⬇️
server/storage/hot_region_storage.go	78.14% <0.00%> (-1.10%)	⬇️
server/tso/global_allocator.go	61.49% <0.00%> (-1.07%)	⬇️
server/election/leadership.go	77.31% <0.00%> (-1.04%)	⬇️
server/grpc_service.go	52.43% <0.00%> (-0.89%)	⬇️
... and 21 more

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[JmPotato]

The rest LGTM.

[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: 27c9a5b

[ti-chi-bot]

@LLThomas: Your PR was out of date, I have automatically updated it for you.

At the same time I will also trigger all tests for you:

/run-all-tests

If the CI test fails, you just re-trigger the test that failed and the bot will merge the PR for you after the CI passes.

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.