un-commented and fixed test case

[hechth]

Closes #49

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 89.84%. Comparing base (eb3168d) to head (5b98a41).
Report is 84 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master      #50      +/-   ##
==========================================
+ Coverage   89.76%   89.84%   +0.08%     
==========================================
  Files           8        9       +1     
  Lines        3839     3910      +71     
==========================================
+ Hits         3446     3513      +67     
- Misses        393      397       +4     

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[KristinaGomoryova]

Consider removing the non-parametrized test if mode=TRUE if parametrized covers both cases, otherwise looks good :-)