fix: AutoSuggestBox Reason with inconsistency

src/SamplesApp/SamplesApp.UITests/Windows_UI_Xaml_Controls/AutoSuggestBoxTests/AutoSuggestBoxTests.cs

@@ -25,5 +25,24 @@ public void PasswordBox_With_Description()
 			using var screenshot = TakeScreenshot("AutoSuggestBox Description", new ScreenshotOptions() { IgnoreInSnapshotCompare = true });
 			ImageAssert.HasColorAt(screenshot, autoSuggestBoxRect.X + autoSuggestBoxRect.Width / 2, autoSuggestBoxRect.Y + autoSuggestBoxRect.Height - 50, Color.Red);
 		}
+
+		[Test]
+		[AutoRetry]
+		[ActivePlatforms(Platform.iOS, Platform.Browser)] // Android not working currently. https://github.com/unoplatform/uno/issues/8836
+		public void AutoSuggestBox_Reason()
+		{
+			Run("UITests.Windows_UI_Xaml_Controls.AutoSuggestBoxTests.AutoSuggestBox_Reason", skipInitialScreenshot: true);
+			var SUT = _app.Marked("ReasonAutoSuggestBox");
+			_app.WaitForElement(SUT);
+
+			_app.FastTap("btnPopulate");
+			_app.WaitForText("txtConsole", "ProgrammaticChange");
+			//Entering Text as User
+			SUT.EnterText("m");
+			_app.WaitForText("txtConsole", "UserInput");
+
+			//Missing SuggestionChosen
+			//Uno UI Test does not support keyboard yet
+		}
 	}
 }

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

@@ -1113,6 +1113,10 @@
       <SubType>Designer</SubType>
       <Generator>MSBuild:Compile</Generator>
     </Page>
+    <Page Include="$(MSBuildThisFileDirectory)Windows_UI_Xaml_Controls\AutoSuggestBoxTests\AutoSuggestBox_Reason.xaml">
+      <SubType>Designer</SubType>
+      <Generator>MSBuild:Compile</Generator>
+    </Page>
     <Page Include="$(MSBuildThisFileDirectory)Windows_UI_Xaml_Controls\BitmapIconTests\BitmapIcon_Generic.xaml">
       <SubType>Designer</SubType>
       <Generator>MSBuild:Compile</Generator>
@@ -5338,6 +5342,9 @@
     <Compile Include="$(MSBuildThisFileDirectory)Windows_UI_Xaml_Controls\AutoSuggestBoxTests\AutoSuggestBox_Icons.xaml.cs">
       <DependentUpon>AutoSuggestBox_Icons.xaml</DependentUpon>
     </Compile>
+    <Compile Include="$(MSBuildThisFileDirectory)Windows_UI_Xaml_Controls\AutoSuggestBoxTests\AutoSuggestBox_Reason.xaml.cs">
+      <DependentUpon>AutoSuggestBox_Reason.xaml</DependentUpon>
+    </Compile>
     <Compile Include="$(MSBuildThisFileDirectory)Windows_UI_Xaml_Controls\AutoSuggestBoxTests\MeasuredBitmapIcon.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Windows_UI_Xaml_Controls\BitmapIconTests\BitmapIcon_Sizing.xaml.cs">
       <DependentUpon>BitmapIcon_Sizing.xaml</DependentUpon>

src/SamplesApp/UITests.Shared/Windows_UI_Xaml_Controls/AutoSuggestBoxTests/AutoSuggestBox_Reason.xaml

@@ -0,0 +1,15 @@
+<Page
+    x:Class="UITests.Windows_UI_Xaml_Controls.AutoSuggestBoxTests.AutoSuggestBox_Reason"
+    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+    xmlns:local="using:UITests.Windows_UI_Xaml_Controls.AutoSuggestBoxTests"
+    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
+    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
+    mc:Ignorable="d"
+    Background="{ThemeResource ApplicationPageBackgroundThemeBrush}">
+	<StackPanel>
+		<TextBlock x:Name="txtConsole"></TextBlock>
+		<Button Click="PopulateClick" x:Name="btnPopulate">Populate</Button>
+		<AutoSuggestBox x:Name="ReasonAutoSuggestBox"/>
+	</StackPanel>
+</Page>

src/SamplesApp/UITests.Shared/Windows_UI_Xaml_Controls/AutoSuggestBoxTests/AutoSuggestBox_Reason.xaml.cs

@@ -0,0 +1,47 @@
+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Linq;
+using System.Runtime.InteropServices.WindowsRuntime;
+using Uno.UI.Samples.Controls;
+using Windows.Foundation;
+using Windows.Foundation.Collections;
+using Windows.UI.Xaml;
+using Windows.UI.Xaml.Controls;
+using Windows.UI.Xaml.Controls.Primitives;
+using Windows.UI.Xaml.Data;
+using Windows.UI.Xaml.Input;
+using Windows.UI.Xaml.Media;
+using Windows.UI.Xaml.Navigation;
+
+namespace UITests.Windows_UI_Xaml_Controls.AutoSuggestBoxTests
+{
+	[Sample("AutoSuggestBox")]
+	public sealed partial class AutoSuggestBox_Reason : Page
+	{
+
+		public List<string> SampleList = new List<string>
+		{
+			"Africa",
+			"America",
+			"Europe",
+		};
+
+		public AutoSuggestBox_Reason()
+		{
+			this.InitializeComponent();
+
+			ReasonAutoSuggestBox.ItemsSource = SampleList;
+			ReasonAutoSuggestBox.TextChanged += (s, e) =>
+			{
+				txtConsole.Text = e.Reason.ToString();
+			};
+		}
+		public void PopulateClick(object sender, RoutedEventArgs e)
+		{
+			ReasonAutoSuggestBox.Text = "A";
+		}
+
+
+	}
+}

src/Uno.UI/UI/Xaml/Controls/AutoSuggestBox/AutoSuggestBox.cs

@@ -28,7 +28,7 @@ public partial class AutoSuggestBox : ItemsControl, IValueChangedListener
 		private Grid _layoutRoot;
 		private ListView _suggestionsList;
 		private Button _queryButton;
-		private AutoSuggestionBoxTextChangeReason _textChangeReason;
+		private AutoSuggestionBoxTextChangeReason _textChangeReason = AutoSuggestionBoxTextChangeReason.ProgrammaticChange;
 		private string userInput;
 		private BindingPath _textBoxBinding;