[Feature-5498][JsonSplit-api] fix some ut

[brave-lee]

#5498

[codecov-commenter]

Codecov Report

❗ No coverage uploaded for pull request base (json_split_two@2799203). Click here to learn what that means.
The diff coverage is n/a.

@@                Coverage Diff                @@
##             json_split_two    #6121   +/-   ##
=================================================
  Coverage                  ?   42.53%           
  Complexity                ?     3535           
=================================================
  Files                     ?      629           
  Lines                     ?    25463           
  Branches                  ?     2889           
=================================================
  Hits                      ?    10830           
  Misses                    ?    13574           
  Partials                  ?     1059           

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[sonarqubecloud]

SonarCloud Quality Gate failed.   

13 Bugs
2 Vulnerabilities
0 Security Hotspots
77 Code Smells

40.3% Coverage
1.0% Duplication

[lenboo]

+1