add testcase

[wsxe9988]

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[codecov-commenter]

Codecov Report

Merging #112 (f6ca22e) into main (c1b0e61) will decrease coverage by 0.01%.
The diff coverage is n/a.

@@             Coverage Diff              @@
##               main     #112      +/-   ##
============================================
- Coverage     65.18%   65.16%   -0.02%     
  Complexity     8249     8249              
============================================
  Files           421      421              
  Lines         45983    45983              
  Branches       9314     9314              
============================================
- Hits          29972    29966       -6     
- Misses        12386    12392       +6     
  Partials       3625     3625              

Impacted Files	Coverage Δ
core/src/main/java/com/alibaba/fastjson2/JSON.java	72.51% <0.00%> (-0.59%)	⬇️
...ain/java/com/alibaba/fastjson2/JSONWriterUTF8.java	74.64% <0.00%> (-0.26%)	⬇️
...in/java/com/alibaba/fastjson2/JSONWriterJSONB.java	57.71% <0.00%> (-0.19%)	⬇️

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