Refactor yf ut

[tfukaza]

No description provided.

[codecov]

Codecov Report

Attention: Patch coverage is 87.50000% with 3 lines in your changes are missing coverage. Please review.

Project coverage is 45.74%. Comparing base (2f4e20d) to head (878a11a).

Files	Patch %	Lines
harvest/broker/yahoo.py	84.61%	2 Missing ⚠️
harvest/util/date.py	90.90%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #298      +/-   ##
==========================================
+ Coverage   41.62%   45.74%   +4.12%     
==========================================
  Files          26       26              
  Lines        3825     3834       +9     
==========================================
+ Hits         1592     1754     +162     
+ Misses       2233     2080     -153     

Flag	Coverage Δ
unittests	45.74% <87.50%> (+4.12%)	⬆️

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