test: add a function to debug codecov

[wuhuizuo]

No description provided.

[codecov]

Codecov Report

Merging #58 (1dc65ca) into coverage (e55b489) will decrease coverage by 0.1011%.
The diff coverage is 0.0000%.

Additional details and impacted files

@@               Coverage Diff               @@
##           coverage       #58        +/-   ##
===============================================
- Coverage    4.5454%   4.4444%   -0.1011%     
===============================================
  Files             1         1                
  Lines            88        90         +2     
===============================================
  Hits              4         4                
- Misses           82        84         +2     
  Partials          2         2                

Flag	Coverage Δ
integration	4.4444% <0.0000%> (-0.1011%)	⬇️
unit	4.4444% <0.0000%> (-0.1011%)	⬇️

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

Components	Coverage Δ
dumpling	∅ <ø> (∅)
parser	∅ <ø> (∅)
br	4.4444% <0.0000%> (-0.1011%)	⬇️