Improve test coverage (WIP)

[BobDotCom]

Summary

Improves test coverage

Checklist

• [ ] If code changes were made then they have been tested.
  • [ ] I have updated the documentation to reflect the changes.
• [ ] If type: ignore comments were used, a comment is also left explaining why
• [ ] This PR fixes an issue.
• [ ] This PR adds something new (e.g. new method or parameters).
• [ ] This PR is a breaking change (e.g. methods or parameters removed/renamed)
• [ ] This PR is not a code change (e.g. documentation, README, typehinting, examples, ...)

[codecov-commenter]

Codecov Report

Merging #1307 (6dd1ef6) into master (23e72dd) will increase coverage by 0.99%. The diff coverage is 100.00%.

:exclamation: Current head 6dd1ef6 differs from pull request most recent head f0818fe. Consider uploading reports for the commit f0818fe to get more accurate results

@@            Coverage Diff             @@
##           master    #1307      +/-   ##
==========================================
+ Coverage   33.42%   34.41%   +0.99%     
==========================================
  Files          93       93              
  Lines       17602    17726     +124     
==========================================
+ Hits         5884     6101     +217     
+ Misses      11718    11625      -93     

Flag	Coverage Δ
pytest	34.41% <100.00%> (+0.99%)	:arrow_up:

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Impacted Files	Coverage Δ
tests/helpers.py	100.00% <100.00%> (+25.00%)	:arrow_up:
tests/test_utils.py	100.00% <100.00%> (ø)
discord/utils.py	50.63% <0.00%> (+19.57%)	:arrow_up:

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