Improve test code.

[overcat]

Checklist

• App update process has been followed
• Target branch is develop
• Application version has been bumped

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 89.36%. Comparing base (8f1fcf5) to head (975425c).
Report is 2 commits behind head on develop.

Additional details and impacted files

@@           Coverage Diff            @@
##           develop      #56   +/-   ##
========================================
  Coverage    89.36%   89.36%           
========================================
  Files            5        5           
  Lines         2688     2688           
========================================
  Hits          2402     2402           
  Misses         286      286           

Flag	Coverage Δ
unittests	89.36% <ø> (ø)

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