arashineクラスの単体テスト追加

[nooneMona]

No description provided.

[codecov]

Codecov Report

Merging #85 (c1fb42d) into develop (13ae0b7) will increase coverage by 6.71%.
The diff coverage is n/a.

@@             Coverage Diff             @@
##           develop      #85      +/-   ##
===========================================
+ Coverage    44.11%   50.83%   +6.71%     
===========================================
  Files            3        4       +1     
  Lines          102      120      +18     
  Branches        33       38       +5     
===========================================
+ Hits            45       61      +16     
- Misses          36       38       +2     
  Partials        21       21              

Impacted Files	Coverage Δ
arashine.js	88.88% <0.00%> (ø)

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[nooneMona]

なぜか15系で通らなくなったな。。まずいな

[nooneMona]

jestjs/jest#10784 u-muw

[nooneMona]

https://jestjs.io/docs/ja/asynchronous#asyncawait これかなあ？