提高覆盖率

[zhongdeming428]

No description provided.

[codecov]

Codecov Report

Merging #1 into master will increase coverage by 25%.
The diff coverage is n/a.

@@          Coverage Diff           @@
##           master     #1    +/-   ##
======================================
+ Coverage      75%   100%   +25%     
======================================
  Files           1      1            
  Lines           4      4            
======================================
+ Hits            3      4     +1     
+ Misses          1      0     -1

Impacted Files	Coverage Δ
src/index.js	100% <0%> (+25%)	⬆️

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