Blazor Hybrid validation cases

[SteveSandersonMS]

This issue is to track creation of automated or CTI tests for Blazor Hybrid scenarios.

Target	from Windows	from Mac
Android	✅dotnet/maui#4919	✅dotnet/maui#4925
iOS	✅dotnet/maui#4921	✅dotnet/maui#4920
Mac	✅dotnet/maui#4923	✅dotnet/maui#4924
WinUI	✅dotnet/maui#4926	n/a
WinForms	❌ Some steps fail	n/a
WPF	✅dotnet/maui#4927	n/a

⌛ = No CTI steps yet prepared

TODO: Determine which of the above are supported. Some combinations might be publish-only without an accompanying developer experience (e.g., Linux CI might be able to publish with -r win-x64).

TODO: In each supported case, create and link to a CTI test that covers:

• Creating the project
• Core developer experience
  • Launching the app (e.g., in simulator/emulator where applicable)
  • Hot reload
  • Debugging
• Core webview/Blazor-specific functionality
  • Consuming an RCL with components and static assets
  • Navigating between Blazor components and to external URLs
  • Event handling
  • File inputs
  • Unhandled exceptions
• Publishing, and observing that the resulting app (including RCL assets, etc) does work

We may find that some of the core webview/Blazor-specific functionality can actually be covered by automated tests and hence is not needed in the CTI script.

[davidortinau]

For .NET MAUI:

• Mac as a target is not a supported scenario from Windows.
• Windows as a target is not a supported scenario from Mac.
• "from Linux" is not supported, though may work for Android

[SteveSandersonMS]

Thanks @davidortinau. I've updated the matrix.

[SteveSandersonMS]

@mkArtakMSFT FYI I've filed issues for all the other scenarios here, and am bumping this meta-issue forwards into 7.0 Preview 3.

My suggestion is we treat the need for coverage like this:

P1:

• Android from Windows
• iOS from Mac
• iOS from Windows
• macOS from Mac
• WinUI
• WPF

P2:

• macOS from Windows (because mostly the tech will be covered by iOS from Windows)
• Android from Mac (because mostly the tech will be covered by Android from Windows)