Add Unit Test case for _logChanges

[Kyle-Ye]

No description provided.

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 22.58065% with 24 lines in your changes are missing coverage. Please review.

Project coverage is 14.74%. Comparing base (a166851) to head (dfbc9d1).

Files	Patch %	Lines
Sources/OpenSwiftUI/Core/View/ViewGraph.swift	0.00%	12 Missing ⚠️
Sources/OpenSwiftUI/Core/Update/Update.swift	0.00%	8 Missing ⚠️
...urces/OpenSwiftUI/Core/View/ViewRendererHost.swift	0.00%	3 Missing ⚠️
...OpenSwiftUI/Data/Preference/PreferenceBridge.swift	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #88      +/-   ##
==========================================
- Coverage   14.79%   14.74%   -0.05%     
==========================================
  Files         190      190              
  Lines        4692     4679      -13     
==========================================
- Hits          694      690       -4     
+ Misses       3998     3989       -9     

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