fix: Ensure `Border.Child` is measured/arranged when reset

[MartinZikmund]

GitHub Issue (If applicable): closes #1046

PR Type

What kind of change does this PR introduce?

• Bugfix

What is the current behavior?

Re-setting Border.Child to the same reference does not do anything.

What is the new behavior?

Measure/Arrange are triggered on the Child as it is temporarily removed and re-added

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)
• [x] Validated PR Screenshots Compare Test Run results.
• [x] Contains NO breaking changes
• [x] Associated with an issue (GitHub or internal) and uses the automatic close keywords.
• [x] Commits must be following the Conventional Commits specification.

[unodevops]

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[jeromelaban]

@MartinZikmund looks like it's failing: https://dev.azure.com/uno-platform/Uno%20Platform/_TestManagement/Runs?runId=2996313&_a=resultSummary&resultId=102934

[unodevops]

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🤖 Your WebAssembly Sample App stage site is ready! Visit it here: https://unowasmprstaging.z20.web.core.windows.net/pr-17860/index.html

[unodevops]

🤖 Your WebAssembly Sample App stage site is ready! Visit it here: https://unowasmprstaging.z20.web.core.windows.net/pr-17860/index.html

[unodevops]

🤖 Your Docs stage site is ready! Visit it here: https://unodocsprstaging.z13.web.core.windows.net/pr-17860/index.html

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[nventive-devops]

The build 138022 found UI Test snapshots differences: android-28-net8: 25, android-28-net8-Snap: 57, ios: 5, ios-Snap: 45, skia-gtk-screenshots: 25, skia-linux-screenshots: 22, skia-windows-screenshots: 28, wasm: 437, wasm-automated-net8.0-UWP-Default-automated: 640, wasm-automated-net8.0-UWP-RuntimeTests-0: 0, wasm-automated-net8.0-UWP-RuntimeTests-1: 0, wasm-automated-net8.0-UWP-RuntimeTests-2: 0, wasm-automated-net8.0-WinUI-Benchmarks-automated: 0, wasm-automated-net8.0-WinUI-RuntimeTests-0: 0, wasm-automated-net8.0-WinUI-RuntimeTests-1: 0, wasm-automated-net8.0-WinUI-RuntimeTests-2: 0

Details

• android-28-net8: 25 changed over 832

  🚨🚨 Comparison Details (first 20) 🚨🚨

  • Detereminate_ProgressRing_Validation50_[#FF0000_#008000_#008000_#FF0000]_Progress-Ring-Value-50
  • ListView_ListViewVariableItemHeightLong_InitializesTest_SamplesApp_Windows_UI_Xaml_Controls_ListView_ListViewVariableItemHeightLong
  • ProgressRing_Visibility_Collapsed_UITests_Windows_UI_Xaml_Controls_ProgressRing_WindowsProgressRing_GH1220
  • MinMaxTest_UITests_Shared_Microsoft_UI_Xaml_Controls_NumberBoxTests_NumberBoxPage
  • RadioButtons_Disable_Validation_Uno_UI_Samples_Content_UITests_ButtonTestsControl_RadioButton_IsEnabled_Automated
  • Detereminate_ProgressRing_Validation25_[#FF0000_#008000_#FF0000_#FF0000]_Progress-Ring-Value-25
  • PopupWithOverlay_After
  • SelectionTest_UITests_Microsoft_UI_Xaml_Controls_RadioButtonsTests_RadioButtonsPage
  • SequentialAnimations_SamplesApp_Windows_UI_Xaml_Media_Animation_SequentialAnimationsPage
  • TextBox_Selection_IsReadOnly_UITests_Shared_Windows_UI_Xaml_Controls_TextBoxTests_TextBox_Selection
  • WebView_NavigateToLongString_AfterSuccess
  • FlyoutTest_DataBoundButton_CommandExecutes_UITests_Shared_Windows_UI_Xaml_Controls_Flyout_Flyout_ButtonInContent
  • DecimalFormatterTest_UITests_Shared_Microsoft_UI_Xaml_Controls_NumberBoxTests_NumberBoxPage
  • ProgressRing_IsEnabled_Running_UITests_Windows_UI_Xaml_Controls_ProgressRing_WindowsProgressRing_GH1220
  • ToggleCollapsedStateToVerifyClipping_UITests_Shared_Microsoft_UI_Xaml_Controls_ExpanderTests_ExpanderColorValidationPage
  • When_Parent_PointerMoved_After_drag_on_non-scrolling_ScrollViewer
  • When_Parent_PointerMoved_After_drag_on_ScrollViewer_-_touch
  • Detereminate_ProgressRing_Validation75_[#FF0000_#008000_#008000_#008000]_Progress-Ring-Value-75
  • UpDownEnabledTest_UITests_Shared_Microsoft_UI_Xaml_Controls_NumberBoxTests_NumberBoxPage
  • UpDownTest_UITests_Shared_Microsoft_UI_Xaml_Controls_NumberBoxTests_NumberBoxPage

• android-28-net8-Snap: 57 changed over 1065

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  • Image_UITests_Windows_UI_Xaml_Controls_ImageTests_SvgImageSource_Basic_UITests_Windows_UI_Xaml_Controls_ImageTests_SvgImageSource_Basic
  • MediaPlayerElement_Mini_player_UITests_Shared_Windows_UI_Xaml_Controls_MediaPlayerElement_MediaPlayerElement_Minimal
  • Gesture_Recognizer_UITests_Shared_Windows_UI_Input_GestureRecognizerTests_Manipulation_Basics_UITests_Shared_Windows_UI_Input_GestureRecognizerTests_Manipulation_Basics
  • Icons_UITests_Microsoft_UI_Xaml_Controls_ImageIconTests_ImageIconPage_UITests_Microsoft_UI_Xaml_Controls_ImageIconTests_ImageIconPage
  • ListView_ListViewIncrementalLoading_SamplesApp_Windows_UI_Xaml_Controls_ListView_ListViewIncrementalLoading
  • NavigationView_MUXControlsTestApp_NavigationViewCustomThemeResourcesPage_MUXControlsTestApp_NavigationViewCustomThemeResourcesPage
  • Image_ImageSourceStream_Uno_UI_Samples_UITests_ImageTestsControl_ImageSourceStream
  • MUX_NumberBox_UITests_Shared_Microsoft_UI_Xaml_Controls_NumberBoxTests_NumberBoxPage
  • TeachingTip_UITests_Microsoft_UI_Xaml_Controls_TeachingTipTests_TeachingTipPage_UITests_Microsoft_UI_Xaml_Controls_TeachingTipTests_TeachingTipPage
  • ListView_HorizontalListView_Templates_SamplesApp_Windows_UI_Xaml_Controls_ListView_HorizontalListView_Templates
  • MediaPlayerElement_Using_3gp_UITests_Shared_Windows_UI_Xaml_Controls_MediaPlayerElement_MediaPlayerElement_3gp_Extension
  • MediaPlayerElement_Using_mp3_Audio_only_UITests_Shared_Windows_UI_Xaml_Controls_MediaPlayerElement_MediaPlayerElement_Mp3_Extension
  • MediaPlayerElement_Using_ogg_UITests_Shared_Windows_UI_Xaml_Controls_MediaPlayerElement_MediaPlayerElement_Ogg_Extension
  • TextBlock_TextBlock_LineHeight_Inlines_Uno_UI_Samples_Content_UITests_TextBlockControl_TextBlock_LineHeight_Inlines
  • TextBlock_TextBlock_Nested_Measure_With_Outer_Alignments_Uno_UI_Samples_Content_UITests_TextBlockControl_TextBlock_Nested_Measure_With_Outer_Alignments
  • ListView_ListViewScrollBar_SamplesApp_Windows_UI_Xaml_Controls_ListView_ListViewScrollBar
  • RatingControl_UITests_Microsoft_UI_Xaml_Controls_RatingControlTests_RatingControlPage_UITests_Microsoft_UI_Xaml_Controls_RatingControlTests_RatingControlPage
  • TextBlock_UITests_Shared_Windows_UI_Xaml_Controls_TextBlockControl_TextBlock_Layout_UITests_Shared_Windows_UI_Xaml_Controls_TextBlockControl_TextBlock_Layout
  • Scrolling_MUXControlsTestApp_ScrollViewDynamicPage_MUXControlsTestApp_ScrollViewDynamicPage
  • TextBlock_TextBlock_Inlines_TemplatedParent_Uno_UI_Samples_Content_UITests_TextBlockControl_TextBlock_Inlines_TemplatedParent

• ios: 5 changed over 268

  🚨🚨 Comparison Details (first 20) 🚨🚨

  • Check_ListView_Swallows_Measure_UITests_Shared_Windows_UI_Xaml_Controls_ListView_ListView_With_ListViews_Count_Measure
  • TextBox_UpdatedBinding_On_OneWay_Mode_UITests_Windows_UI_Xaml_Controls_TextBox_TextBox_Bindings
  • SequentialAnimations_SamplesApp_Windows_UI_Xaml_Media_Animation_SequentialAnimationsPage
  • ProgressRing_Visibility_Collapsed_UITests_Windows_UI_Xaml_Controls_ProgressRing_WindowsProgressRing_GH1220
  • ProgressRing_IsEnabled_Running_UITests_Windows_UI_Xaml_Controls_ProgressRing_WindowsProgressRing_GH1220

• ios-Snap: 45 changed over 1056

  🚨🚨 Comparison Details (first 20) 🚨🚨

  • MediaPlayerElement_Mini_player_UITests_Shared_Windows_UI_Xaml_Controls_MediaPlayerElement_MediaPlayerElement_Minimal
  • Brushes_GenericApp_Views_Content_UITests_ImageBrushTestControl_ImageBrush_UniformToFill_GenericApp_Views_Content_UITests_ImageBrushTestControl_ImageBrush_UniformToFill
  • ListView_ListViewGrouped_SamplesApp_Windows_UI_Xaml_Controls_ListView_ListViewGrouped
  • ListView_ListViewHeaderFooter_ImplicitlyBinded_SamplesApp_Windows_UI_Xaml_Controls_ListView_ListViewHeaderFooter_ImplicitlyBinded
  • Shapes_UITests_Windows_UI_Xaml_Shapes_Ellipse_StrokeThickness_UITests_Windows_UI_Xaml_Shapes_Ellipse_StrokeThickness
  • Icons_UITests_Microsoft_UI_Xaml_Controls_ImageIconTests_ImageIconPage_UITests_Microsoft_UI_Xaml_Controls_ImageIconTests_ImageIconPage
  • SwipeControl_MUXControlsTestApp_SwipeControlPage2_MUXControlsTestApp_SwipeControlPage2
  • Brushes_ImageBrushStretch_Uno_UI_Samples_UITests_ImageBrushTestControl_ImageBrushStretch
  • Image_Uno_UI_Samples_UITests_Image_Image_Stretch_Alignment_Bigger_Uno_UI_Samples_UITests_Image_Image_Stretch_Alignment_Bigger
  • Image_Uno_UI_Samples_UITests_Image_Image_Stretch_Alignment_Equal_Uno_UI_Samples_UITests_Image_Image_Stretch_Alignment_Equal
  • Image_Uno_UI_Samples_UITests_Image_Image_Stretch_Alignment_Smaller_Uno_UI_Samples_UITests_Image_Image_Stretch_Alignment_Smaller
  • ListView_HorizontalListViewGrouped_SamplesApp_Windows_UI_Xaml_Controls_ListView_HorizontalListViewGrouped
  • Image_Uno_UI_Samples_UITests_Image_Image_Stretch_Alignment_Taller_Uno_UI_Samples_UITests_Image_Image_Stretch_Alignment_Taller
  • ListView_ListView_With_ListViews_Count_Measure_UITests_Shared_Windows_UI_Xaml_Controls_ListView_ListView_With_ListViews_Count_Measure
  • NavigationView_MUXControlsTestApp_NavigationViewMinimalPage_MUXControlsTestApp_NavigationViewMinimalPage
  • Image_UITests_Shared_Windows_UI_Xaml_Controls_ImageTests_Image_Stretch_Algmnt_Inf_Horizontal_UITests_Shared_Windows_UI_Xaml_Controls_ImageTests_Image_Stretch_Algmnt_Inf_Horizontal
  • TextBlock_Attributed_text_FontSize_Changing_Uno_UI_Samples_Content_UITests_TextBlockControl_Attributed_text_FontSize_Changing
  • TextBlock_TextBoxSizeChanging_Uno_UI_Samples_Content_UITests_TextBlockControl_TextBoxSizeChanging
  • Brushes_ImageBrushWithCompositeTransform_Uno_UI_Samples_UITests_ImageBrushTestControl_ImageBrushWithCompositeTransform
  • Brushes_RectangleStretchFill_Uno_UI_Samples_UITests_ImageBrushTestControl_RectangleStretchFill

• skia-gtk-screenshots: 25 changed over 2216

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  • RectangleStretchFill.png
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  • StretchNoneBoundingBoxInDoubleStackPanel.png-dark
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• skia-linux-screenshots: 22 changed over 2216

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  • ImageBrush_UniformToFill.png-dark
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  • ImageIconPage.png-dark
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  • ImageBrushStretch.png-dark
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• skia-windows-screenshots: 28 changed over 2216

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  • AppWindowPositionAndSize.png-dark
  • CalendarView_Theming.png
  • BorderImageBrush.png
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• wasm: 437 changed over 1043

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  • Benchmarks.Shared.Controls.BenchmarkDotNetTestsPage
  • MUXControlsTestApp.NavigationViewMinimalPage
  • MUXControlsTestApp.NavigationViewTopNavOverflowButtonPage
  • MUXControlsTestApp.NavigationViewTopNavPage
  • SamplesApp.Samples.UnitTests.HttpUnitTests
  • SamplesApp.Samples.Windows_UI_Xaml_Controls.NavigationViewTests.NavigationView_BasicNavigation
  • SamplesApp.Wasm.Windows_UI_Xaml_Controls.ComboBox.Picker_Resizable
  • SamplesApp.Wasm.Windows_UI_Xaml_Controls.ListView.ListView_IsSelected
  • SamplesApp.Windows_UI_Xaml_Controls.ListView.HorizontalListViewTest
  • SamplesApp.Windows_UI_Xaml_Controls.ListView.ListViewLargeLegacy
  • SamplesApp.Windows_UI_Xaml_Shapes.PathTestsControl.FixedWidthUniform
  • SamplesApp.Windows_UI_Xaml_Shapes.PathTestsControl.StretchUniformAutoSize
  • UITests.Microsoft_UI_Xaml_Controls.AnimatedIconTests.AnimatedIconPage
  • UITests.Microsoft_UI_Xaml_Controls.ColorPickerTests.ColorPickerSample
  • UITests.Shared.Windows_UI_Input.GestureRecognizerTests.TransformationsTests
  • UITests.Shared.Windows_UI_Xaml_Controls.ComboBox.ComboBox_VisibleBounds
  • UITests.Shared.Windows_UI_Xaml_Controls.ContentDialogTests.ContentDialog_Async
  • UITests.Shared.Windows_UI_Xaml_Controls.ContentDialogTests.ContentDialog_Closing
  • UITests.Shared.Windows_UI_Xaml_Controls.TextBlockControl.TextBlock_LineHeight_MultipleControls
  • UITests.Shared.Windows_UI_Xaml_Controls.WebView.WebView_NavigateToString2

• wasm-automated-net8.0-UWP-Default-automated: 640 changed over 1952

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  • Border_CornerRadius_BorderThickness_Border-CornerRadius-10-BorderThickness-10_0_0_10
  • Brushes_RadialGradientBrush_MUXControlsTestApp_RadialGradientBrushPage
  • Button_OverlappedButtons_UITests_Shared_Windows_UI_Xaml_Controls_Button_Overlapped_Buttons
  • Disabled_MenuFlyoutItem_disabledItem
  • Disabled_MenuFlyoutItem_fileMenu
  • FocusManager_GetFocusedElement_ToggleButton_LostFocus_Validation_Uno_UI_Samples_Content_UITests_FocusTests_FocusManager_GetFocus_Automated
  • Grid_Grid_MinWidth_MaxWidth_UITests_Shared_Windows_UI_Xaml_Controls_GridTestsControl_Grid_MinWidth_MaxWidth
  • Image_Invalid_image_invalid_before_hide
  • Image_Invalid_Uno_UI_Samples_UITests_ImageTests_Image_Invalid
  • Image_LargeImageList_Uno_UI_Samples_UITests_LargeImageList
  • InputScope_Should_Not_Validate_Input_Uno_UI_Samples_Content_UITests_TextBoxControl_Input_InputScope_CurrencyAmount
  • Keyboard_Textbox_InsideScrollViewer_Validation_5_-_Remove_Focus_on_numberTextBox
  • Keyboard_Textbox_InsideScrollViewer_Validation_Uno_UI_Samples_Content_UITests_TextBoxControl_Input_Test_InsideScrollerViewer_Automated
  • Keyboard_Textbox_IsEnabled_Validation_Uno_UI_Samples_Content_UITests_TextBoxControl_Input_Test_InsideScrollerViewer_Automated
  • ListView_ListViewGroupedVariableHeightComplexTemplate_SamplesApp_Windows_UI_Xaml_Controls_ListView_ListViewGroupedVariableHeightComplexTemplate
  • ListView_ListViewHeaderFooterOnly_SamplesApp_Windows_UI_Xaml_Controls_ListView_ListViewHeaderFooterOnly
  • ListView_ListViewHeaderImage_SamplesApp_Windows_UI_Xaml_Controls_ListView_ListViewHeaderImage
  • AutoSuggestBox_UITests_Windows_UI_Xaml_Controls_AutoSuggestBoxTests_AutoSuggestBox_Description_UITests_Windows_UI_Xaml_Controls_AutoSuggestBoxTests_AutoSuggestBox_Description
  • BitmapImage_vs_SvgImageSource_BitmapRemote_UITests_Windows_UI_Xaml_Controls_ImageTests_BitmapImage_vs_SvgImageSource
  • Border_Border_CornerRadius_BorderThickness_UITests_Windows_UI_Xaml_Controls_BorderTests_Border_CornerRadius_BorderThickness

• wasm-automated-net8.0-UWP-RuntimeTests-0: 0 changed over 1

• wasm-automated-net8.0-UWP-RuntimeTests-1: 0 changed over 1

• wasm-automated-net8.0-UWP-RuntimeTests-2: 0 changed over 1

• wasm-automated-net8.0-WinUI-Benchmarks-automated: 0 changed over 1

• wasm-automated-net8.0-WinUI-RuntimeTests-0: 0 changed over 1

• wasm-automated-net8.0-WinUI-RuntimeTests-1: 0 changed over 1

• wasm-automated-net8.0-WinUI-RuntimeTests-2: 0 changed over 1