Add code coverage for MonthCalendar

[Zheng-Li01]

related #10453

Proposed changes

• Add unit tests for MonthCalendar to test its properties: HitTestInfo, HitArea, Help, Name, Bounds, Description, Role , State
• Add unit tests for MonthCalendar to test its methods: GetFocused(), Select().

Customer Impact

• None

Regression?

• No

Risk

• Minimal

Test methodology

• Unit tests

Microsoft Reviewers: Open in CodeFlow

[codecov]

Codecov Report

Attention: Patch coverage is 94.40559% with 8 lines in your changes are missing coverage. Please review.

Project coverage is 74.34049%. Comparing base (0eb3e7b) to head (f59bc48).
Report is 36 commits behind head on main.

Additional details and impacted files

@@                 Coverage Diff                 @@
##                main      #11217         +/-   ##
===================================================
+ Coverage   73.47521%   74.34049%   +0.86527%     
===================================================
  Files           3101        3012         -89     
  Lines         632431      625885       -6546     
  Branches       46688       46553        -135     
===================================================
+ Hits          464680      465286        +606     
+ Misses        164343      157204       -7139     
+ Partials        3408        3395         -13     

Flag	Coverage Δ
Debug	74.34049% <94.40559%> (+0.86527%)	⬆️
integration	18.33496% <ø> (-0.02961%)	⬇️
production	46.98336% <ø> (+0.01556%)	⬆️
test	97.04028% <94.40559%> (+2.05223%)	⬆️
unit	43.92762% <ø> (-0.00976%)	⬇️

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[lonitra]

Thank you!