tests/discovery: reduce TestRegister cost time

[HuSharp]

What problem does this PR solve?

Issue Number: Ref #7930

What is changed and how does it work?

can reduce from 2min to 60s
check on log

[2024/03/19 18:21:40.148 +08:00] [INFO] [register.go:73] ["exit register process"] [key=/ms/12345/test_service/registry/http://127.0.0.1:1]
[2024/03/19 18:21:40.159 +08:00] [INFO] [register.go:73] ["exit register process"] [key=/ms/12345/test_service/registry/127.0.0.1:2]
[2024/03/19 18:21:48.157 +08:00] [ERROR] [register.go:77] ["keep alive failed"] 

Check List

Tests

• Unit test

Release note

None.

[ti-chi-bot]

[REVIEW NOTIFICATION]

This pull request has been approved by:

• JmPotato
• lhy1024

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[HuSharp]

/hold

[HuSharp]

/unhold

[codecov]

Codecov Report

Merging #7946 (6455e67) into master (13188c9) will increase coverage by 0.00%.
The diff coverage is n/a.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #7946   +/-   ##
=======================================
  Coverage   73.58%   73.59%           
=======================================
  Files         436      436           
  Lines       48464    48464           
=======================================
+ Hits        35661    35665    +4     
+ Misses       9743     9742    -1     
+ Partials     3060     3057    -3     

Flag	Coverage Δ
unittests	73.59% <ø> (+<0.01%)	⬆️

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

[JmPotato]

Could you please help explain the check here?

[HuSharp]

• check log in function ServiceRegister.Register

  pd/pkg/mcs/discovery/register.go

  Line 77 in 6377b26

  log.Error("keep alive failed", zap.String("key", sr.key))

• count relates to the number of tests in the for loop to ensure that each eventually working well

[JmPotato]

It's kind of tricky to me since we may have "keep alive failed" with different meanings in logs, how can we make sure it comes from the ServiceRegister.Register definitely now and then?

[HuSharp]

using regexp to make sure the log was resulted by register

and test time can be reduced to 40s

[JmPotato]

/merge

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[ti-chi-bot]

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

Commit hash: 6455e67