test: add runtime regression tests

src/SamplesApp/UITests.Shared/UITests.Shared.projitems

@@ -9646,6 +9646,7 @@
     <Content Include="$(MSBuildThisFileDirectory)Assets\closeIcon.png" />
     <Content Include="$(MSBuildThisFileDirectory)Assets\colored-ellipse.jpg" />
     <Content Include="$(MSBuildThisFileDirectory)Assets\ColorPicker.png" />
+    <Content Include="$(MSBuildThisFileDirectory)Assets\Fonts\BravuraText.ttf" />
     <None Include="$(MSBuildThisFileDirectory)Assets\colors300-transitive.png" />
     <Content Include="$(MSBuildThisFileDirectory)Assets\colors300.png" />
     <Content Include="$(MSBuildThisFileDirectory)Assets\ComboBox.png" />
@@ -9841,4 +9842,4 @@
     </Compile>
   </ItemGroup>
   <Import Project="ItemExclusions.props" />
-</Project>
+</Project>

src/Uno.UI.RuntimeTests/Tests/Windows_UI_Xaml_Controls/Given_TextBlock.cs

@@ -19,6 +19,7 @@
 using static Private.Infrastructure.TestServices;
 using System.Collections.Generic;
 using System.Drawing;
+using SamplesApp.UITests;
 using Uno.Disposables;
 using Uno.Extensions;
 using Point = Windows.Foundation.Point;
@@ -733,6 +734,44 @@ public async Task When_SolidColorBrush_With_Opacity()
 			ImageAssert.HasColorInRectangle(bitmap, new System.Drawing.Rectangle(0, 0, bitmap.Width, bitmap.Height), Colors.Red.WithOpacity(.5));
 		}
 
+
+		[TestMethod]
+		[UnoWorkItem("https://github.com/unoplatform/uno/issues/6528")]
+		public async Task When_Font_padding()
+		{
+			TextBlock tb1, tb2;
+			var sp = new StackPanel
+			{
+				Children =
+				{
+					new Border
+					{
+						BorderThickness = new Thickness(1),
+						BorderBrush = new SolidColorBrush(Microsoft.UI.Colors.Green),
+						Child = tb1 = new TextBlock
+						{
+							Text = "Default Font"
+						}
+					},
+					new Border
+					{
+						BorderThickness = new Thickness(1),
+						BorderBrush = new SolidColorBrush(Microsoft.UI.Colors.Red),
+						Child = tb2 = new TextBlock
+						{
+							FontFamily = new FontFamily("ms-appx:///Assets/Fonts/BravuraText.ttf"),
+							Text = "Bravura Font"
+						}
+					}
+				}
+			};
+
+			await UITestHelper.Load(sp);
+
+			// The 2 fonts don't have the same exact ascents and descents, so they're not supposed to be equal, just mostly the same
+			Assert.AreEqual(tb1.ActualHeight, tb2.ActualHeight, 5);
+		}
+
 		[TestMethod]
 		[RunsOnUIThread]
 		public async Task When_TextWrapping_Changed()

src/Uno.UI.RuntimeTests/Tests/Windows_UI_Xaml_Controls/Given_TextBox.cs

@@ -1151,5 +1151,41 @@ private static async Task<TextBox> LoadZeroSizeTextBoxAsync(Style style)
 			await WindowHelper.WaitForIdle(); // Needed to account for lifecycle differences on mobile
 			return textBox;
 		}
+
+		[TestMethod]
+		[UnoWorkItem("https://github.com/unoplatform/uno/issues/6528")]
+		public async Task When_Font_padding()
+		{
+			TextBox tb1, tb2;
+			var sp = new StackPanel
+			{
+				Children =
+				{
+					new Border
+					{
+						BorderThickness = new Thickness(1),
+						BorderBrush = new SolidColorBrush(Microsoft.UI.Colors.Green),
+						Child = tb1 = new TextBox
+						{
+							Text = "Default Font"
+						}
+					},
+					new Border
+					{
+						BorderThickness = new Thickness(1),
+						BorderBrush = new SolidColorBrush(Microsoft.UI.Colors.Red),
+						Child = tb2 = new TextBox
+						{
+							FontFamily = new FontFamily("ms-appx:///Assets/Fonts/BravuraText.ttf"),
+							Text = "Bravura Font"
+						}
+					}
+				}
+			};
+
+			await UITestHelper.Load(sp);
+
+			Assert.AreEqual(tb1.ActualHeight, tb2.ActualHeight);
+		}
 	}
 }