⚙️ Add tests for Сleaner

[swiftyfinch]

Description

I've added tests for СleanerTests.

References

• #236

Checklist (I have ...)

• 🧐 Followed the code style of the rest of the project
• 📖 Updated the documentation, if necessary
• 👨🏻‍🔧 Added at least one test which validates that my change is working, if appropriate
• 👮🏻‍♂️ Run make lint and fixed all warnings
• ✅ Run make test and fixed all tests

❤️ Thanks for contributing to the 🏈 Rugby!

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (2683476) 55.36% compared to head (50591fe) 55.95%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #311      +/-   ##
==========================================
+ Coverage   55.36%   55.95%   +0.59%     
==========================================
  Files         140      140              
  Lines        4064     4064              
==========================================
+ Hits         2250     2274      +24     
+ Misses       1814     1790      -24     

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