Test opacity of a partly visible marker

[sbachinin]

Concludes #3458

[HarelM]

For some reason codecov didn't send a message, can you make sure the line is now fully covered?

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (4e28671) 86.61% compared to head (ef6fed0) 86.94%.
Report is 8 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3644      +/-   ##
==========================================
+ Coverage   86.61%   86.94%   +0.32%     
==========================================
  Files         240      240              
  Lines       32214    32214              
  Branches     2132     2116      -16     
==========================================
+ Hits        27903    28007     +104     
+ Misses       3356     3258      -98     
+ Partials      955      949       -6     

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[sbachinin]

From my understanding, this line is now ok. There are test cases that reach this line and execute both truthy and falsy part

[sbachinin]

Noticed that marker loses opacity on window resize. Is it worth creating an issue?

[HarelM]

Can you attach a video?

[sbachinin]

Untitled.Project.mp4

2 times it lost opacity, last time it didn't

[HarelM]

I would recommend opening a new issue, maybe an issue with the coordinates buffer.