MediaPlayer tests are failing too often

[rafael-rosa-knowcode]

GitHub Issue (If applicable): closes #13384

PR Type

What kind of change does this PR introduce?

• Refactoring (no functional changes, no api changes)

What is the current behavior?

When_MediaPlayerElement_AutoPlay_Source
When_MediaPlayerElement_NotAutoPlay_Source
When_MediaPlayerElement_SetIsFullWindow_Check_Fullscreen
When_MediaPlayerElement_SetSource_Check_PlayStop

It is likely caused by the URL that may not always be available. Let's use uno assets site instead (maybe with a version of the file that is smaller than 5MB).

---
	Details:
Failed: When_MediaPlayerElement_AutoPlay_Source() [Microsoft.VisualStudio.TestTools.UnitTesting.AssertFailedException] 
 Microsoft.VisualStudio.TestTools.UnitTesting.AssertFailedException: Timed out waiting for condition to be met. Windows.UI.Xaml.Controls.MediaPlayerElement loaded
   at Private.Infrastructure.TestServices.WindowHelper.WaitFor(Func`1 condition, Int32 timeoutMS, String message, String callerMemberName, Int32 lineNumber)
   at Private.Infrastructure.TestServices.WindowHelper.<>c__DisplayClass33_0.<<WaitForLoaded>g__Do|0>d.MoveNext()
--- End of stack trace from previous location ---
   at Private.Infrastructure.TestServices.WindowHelper.WaitForLoaded(FrameworkElement element, Int32 timeoutMS)
   at Uno.UI.RuntimeTests.Tests.Windows_UI_Xaml_Controls.Given_MediaPlayerElement.When_MediaPlayerElement_AutoPlay_Source()
   at Uno.UI.Samples.Tests.UnitTestsControl.<>c__DisplayClass63_1.<<ExecuteTestsForInstance>g__InvokeTestMethod|2>d.MoveNext()

Failed: When_MediaPlayerElement_NotAutoPlay_Source() [Microsoft.VisualStudio.TestTools.UnitTesting.AssertFailedException] 
 Microsoft.VisualStudio.TestTools.UnitTesting.AssertFailedException: Timed out waiting for condition to be met. Windows.UI.Xaml.Controls.MediaPlayerElement loaded
   at Private.Infrastructure.TestServices.WindowHelper.WaitFor(Func`1 condition, Int32 timeoutMS, String message, String callerMemberName, Int32 lineNumber)
   at Private.Infrastructure.TestServices.WindowHelper.<>c__DisplayClass33_0.<<WaitForLoaded>g__Do|0>d.MoveNext()
--- End of stack trace from previous location ---
   at Private.Infrastructure.TestServices.WindowHelper.WaitForLoaded(FrameworkElement element, Int32 timeoutMS)
   at Uno.UI.RuntimeTests.Tests.Windows_UI_Xaml_Controls.Given_MediaPlayerElement.When_MediaPlayerElement_NotAutoPlay_Source()
   at Uno.UI.Samples.Tests.UnitTestsControl.<>c__DisplayClass63_1.<<ExecuteTestsForInstance>g__InvokeTestMethod|2>d.MoveNext()

Failed: When_MediaPlayerElement_SetIsFullWindow_Check_Fullscreen() [Microsoft.VisualStudio.TestTools.UnitTesting.AssertFailedException] 
 Microsoft.VisualStudio.TestTools.UnitTesting.AssertFailedException: Timed out waiting for condition to be met. Windows.UI.Xaml.Controls.MediaPlayerElement loaded
   at Private.Infrastructure.TestServices.WindowHelper.WaitFor(Func`1 condition, Int32 timeoutMS, String message, String callerMemberName, Int32 lineNumber)
   at Private.Infrastructure.TestServices.WindowHelper.<>c__DisplayClass33_0.<<WaitForLoaded>g__Do|0>d.MoveNext()
--- End of stack trace from previous location ---
   at Private.Infrastructure.TestServices.WindowHelper.WaitForLoaded(FrameworkElement element, Int32 timeoutMS)
   at Uno.UI.RuntimeTests.Tests.Windows_UI_Xaml_Controls.Given_MediaPlayerElement.When_MediaPlayerElement_SetIsFullWindow_Check_Fullscreen()
   at Uno.UI.Samples.Tests.UnitTestsControl.<>c__DisplayClass63_1.<<ExecuteTestsForInstance>g__InvokeTestMethod|2>d.MoveNext()

Failed: When_MediaPlayerElement_SetSource_Check_PlayStop() [Microsoft.VisualStudio.TestTools.UnitTesting.AssertFailedException] 
 Microsoft.VisualStudio.TestTools.UnitTesting.AssertFailedException: Timed out waiting for condition to be met. Windows.UI.Xaml.Controls.MediaPlayerElement loaded
   at Private.Infrastructure.TestServices.WindowHelper.WaitFor(Func`1 condition, Int32 timeoutMS, String message, String callerMemberName, Int32 lineNumber)
   at Private.Infrastructure.TestServices.WindowHelper.<>c__DisplayClass33_0.<<WaitForLoaded>g__Do|0>d.MoveNext()
--- End of stack trace from previous location ---
   at Private.Infrastructure.TestServices.WindowHelper.WaitForLoaded(FrameworkElement element, Int32 timeoutMS)
   at Uno.UI.RuntimeTests.Tests.Windows_UI_Xaml_Contr

What is the new behavior?

Runs from a URL from uno-assets

Copilot Summary

🤖 Generated by Copilot at f60f165

Enabled and fixed some media player element tests in Given_MediaPlayerElement.cs. Updated the test video URL to improve reliability.

PR Checklist

Please check if your PR fulfills the following requirements:

• Docs have been added/updated which fit documentation template (for bug fixes / features)
• Unit Tests and/or UI Tests for the changes have been added (for bug fixes / features) (if applicable)
• Validated PR Screenshots Compare Test Run results.
• Contains NO breaking changes
• Associated with an issue (GitHub or internal) and uses the automatic close keywords.
• Commits must be following the Conventional Commits specification.

Other information

Internal Issue (If applicable):

[rafael-rosa-knowcode]

How can I access the list of videos within https://uno-assets.platform.uno/tests/videos?

I am aware of this Getting_Started_with_Uno_Platform_and_Visual_Studio_Code.mp4
which is 6.6MB.
For now I put this one, but I would need some guidance on how to upload another video or the link of an existing one.

In case of need, this meets the requirements of 5MB.
https://test-videos.co.uk/vids/bigbuckbunny/mp4/h264/720/Big_Buck_Bunny_720_10s_5MB.mp4

Tests.

[Youssef1313]

The tests still fail in CI.

[github-actions]

This PR is stale because it has been open 60 days with no activity. Remove stale label or comment or it will be closed in 10 days.