Add new function for patch coverage testing

[zhiwei-homage]

No description provided.

[codecov]

Codecov Report

Attention: 2 lines in your changes are missing coverage. Please review.

Comparison is base (001afc2) 27.77% compared to head (4eeba64) 28.20%.
Report is 2 commits behind head on testing.

Files	Patch %	Lines
index.js	33.33%	2 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##           testing       #3      +/-   ##
===========================================
+ Coverage    27.77%   28.20%   +0.42%     
===========================================
  Files            1        1              
  Lines           36       39       +3     
===========================================
+ Hits            10       11       +1     
- Misses          26       28       +2     

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