test(core): increase test coverage

[sebastijankuzner]

Summary

Solves #4014

Increase core coverage to 100 %.

Checklist

• Tests (if necessary)
• Ready to be merged

[codecov]

Codecov Report

Merging #4049 into develop will increase coverage by 0.02%.
The diff coverage is n/a.

@@             Coverage Diff             @@
##           develop    #4049      +/-   ##
===========================================
+ Coverage    96.46%   96.48%   +0.02%     
===========================================
  Files          715      715              
  Lines        17235    17235              
  Branches      2098     2098              
===========================================
+ Hits         16626    16630       +4     
  Misses         418      418              
+ Partials       191      187       -4     

Flag	Coverage Δ
#functional	5.97% <ø> (ø)
#integration	10.19% <ø> (ø)
#unit	94.47% <ø> (+0.02%)	⬆️

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Impacted Files	Coverage Δ
...kages/core/src/utils/snapshot-progress-renderer.ts	100.00% <ø> (+13.79%)	⬆️

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