fix: TinkerPop unit test lack some lables

[zyxxoo]

Purpose of the PR

• close #xxx

Main Changes

Verifying these changes

• Trivial rework / code cleanup without any test coverage. (No Need)
• Already covered by existing tests, such as (please modify tests here).
• Need tests and can be verified as follows:
  • xxx

Does this PR potentially affect the following parts?

• Nope
• Dependencies (add/update license info)
• Modify configurations
• The public API
• Other affects (typed here)

Documentation Status

• Doc - TODO
• Doc - Done
• Doc - No Need

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (ed493f3) 66.26% compared to head (40c1c54) 66.26%.
Report is 8 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##             master    #2387    +/-   ##
==========================================
  Coverage     66.26%   66.26%            
+ Complexity      830      828     -2     
==========================================
  Files           509      511     +2     
  Lines         42106    42590   +484     
  Branches       5833     5941   +108     
==========================================
+ Hits          27903    28224   +321     
- Misses        11450    11555   +105     
- Partials       2753     2811    +58     

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