Add unit tests for LinkUtilities

[Olina-Zhang]

related #10453

Proposed changes

• Add unit tests for LinkUtilities to test its GetIELinkBehavior and EnsureLinkFonts methods.

Microsoft Reviewers: Open in CodeFlow

[ricardobossan]

There are failing tests in the CI that need to be addressed.

[Olina-Zhang]

There are failing tests in the CI that need to be addressed.

I don't know why test scenarios failed, because all are passed in my local machine:

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 76.04500%. Comparing base (a5281d9) to head (0396ff9).
Report is 16 commits behind head on main.

Additional details and impacted files

@@                 Coverage Diff                  @@
##                main      #12647          +/-   ##
====================================================
- Coverage   97.03492%   76.04500%   -20.98992%     
====================================================
  Files           1182        3181        +1999     
  Lines         354561      639666      +285105     
  Branches        5411       47214       +41803     
====================================================
+ Hits          344048      486434      +142386     
- Misses          9724      149716      +139992     
- Partials         789        3516        +2727     

Flag	Coverage Δ
Debug	76.04500% <100.00000%> (-20.98992%)	⬇️
integration	18.17541% <ø> (?)
production	49.84658% <ø> (?)
test	97.03149% <100.00000%> (-0.00343%)	⬇️
unit	47.04381% <ø> (?)

Flags with carried forward coverage won't be shown. Click here to find out more.

[Tanya-Solyanik]

Registry values are machine-wide singletons, multiple test cases might be accessing them at the same time. If we are changing these values, we have to move all tests that read and write them into a sequential collection. It will be hard to identify all tests that read these values behind the scenes. And we might miss that the future tests read this value going forward.
Instead of writing this key I would suggest to read it, and set the right expected LinkBehavior based on the key value.

New comment to be addressed