Refactor test of columns

[Tigrov]

Related PR

• Refactor test of columns db#950

Q	A
Is bugfix?	❌
New feature?	❌
Breaks BC?	❌
Fixed issues

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 98.48%. Comparing base (eabf199) to head (c971d7a).
Report is 1 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff            @@
##             master     #349   +/-   ##
=========================================
  Coverage     98.48%   98.48%           
  Complexity      330      330           
=========================================
  Files            21       21           
  Lines          1053     1053           
=========================================
  Hits           1037     1037           
  Misses           16       16           

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