[Testing] Feature Matrix UITest Cases for DatePicker Control

src/Controls/tests/TestCases.HostApp/CoreViews/CorePageView.cs

@@ -54,6 +54,7 @@ public override string ToString()
 			new GalleryPageFactory(() => new CarouselViewCoreGalleryPage(), "CarouselView Gallery"),
 			new GalleryPageFactory(() => new CheckBoxCoreGalleryPage(), "CheckBox Gallery"),
 			new GalleryPageFactory(() => new CollectionViewCoreGalleryPage(), "CollectionView Gallery"),
+			new GalleryPageFactory(() => new DatePickerControlPage(), "Date Picker Feature Matrix"),
 			new GalleryPageFactory(() => new DatePickerCoreGalleryPage(), "Date Picker Gallery"),
 			new GalleryPageFactory(() => new EditorCoreGalleryPage(), "Editor Gallery"),
 			new GalleryPageFactory(() => new EntryCoreGalleryPage(), "Entry Gallery"),

src/Controls/tests/TestCases.HostApp/FeatureMatrix/DatePicker/DatePickerControlPage.xaml

@@ -0,0 +1,56 @@
+<?xml version="1.0" encoding="utf-8" ?>
+<ContentPage xmlns="http://schemas.microsoft.com/dotnet/2021/maui"
+             xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
+             xmlns:local="clr-namespace:Maui.Controls.Sample"
+             x:Class="Maui.Controls.Sample.DatePickerMainControlPage"
+             x:DataType="local:DatePickerViewModel"
+             Title="DatePickerControlPage">
+       <ContentPage.ToolbarItems>
+              <ToolbarItem Text="Options"
+                           Clicked="NavigateToOptionsPage_Clicked"
+                           AutomationId="Options"/>
+       </ContentPage.ToolbarItems>
+       <VerticalStackLayout
+              Spacing="20">
+              <VerticalStackLayout x:Name="DatePickerLayout"
+                                   Padding="20,100,20,100">
+                     <DatePicker AutomationId="DatePickerControl"
+                                 CharacterSpacing="{Binding CharacterSpacing}"
+                                 Date="{Binding Date}"
+                                 DateSelected="OnDateSelected"
+                                 FlowDirection="{Binding FlowDirection}"
+                                 Format="{Binding Format}"
+                                 FontAttributes="{Binding FontAttributes}"
+                                 FontFamily="{Binding FontFamily}"
+                                 FontSize="{Binding FontSize}"
+                                 IsEnabled="{Binding IsEnabled}"
+                                 IsVisible="{Binding IsVisible}"
+                                 MinimumDate="{Binding MinimumDate}"
+                                 MaximumDate="{Binding MaximumDate}"
+                                 Shadow="{Binding Shadow}"
+                                 TextColor="{Binding TextColor}"/>
+              </VerticalStackLayout>
+
+              <Label Text="DateSelected Event"
+                     HorizontalOptions="Center"/>
+              <HorizontalStackLayout HorizontalOptions="Center">
+                     <Label Text="New Date: "/>
+                     <Label x:Name="NewDateSelectedLabel"
+                            AutomationId="NewDateSelectedLabel"/>
+              </HorizontalStackLayout>
+              <HorizontalStackLayout HorizontalOptions="Center">
+                     <Label Text="Old Date: "/>
+                     <Label x:Name="OldDateSelectedLabel"
+                            AutomationId="OldDateSelectedLabel"/>
+              </HorizontalStackLayout>
+
+              <Label Text="Culture Format Display"
+                     HorizontalOptions="Center"
+                     FontAttributes="Bold"
+                     Margin="0,10,0,0"/>
+              <Label x:Name="CultureFormatLabel"
+                     HorizontalOptions="Center"
+                     AutomationId="CultureFormatLabel"
+                     Margin="0,0,0,10"/>
+       </VerticalStackLayout>
+</ContentPage>

src/Controls/tests/TestCases.HostApp/FeatureMatrix/DatePicker/DatePickerControlPage.xaml.cs

@@ -0,0 +1,112 @@
+using System.Globalization;
+
+namespace Maui.Controls.Sample;
+
+public class DatePickerControlPage : NavigationPage
+{
+	private DatePickerViewModel _viewModel;
+	public DatePickerControlPage()
+	{
+		_viewModel = new DatePickerViewModel();
+		PushAsync(new DatePickerMainControlPage(_viewModel));
+	}
+}
+
+public partial class DatePickerMainControlPage : ContentPage
+{
+	private DatePickerViewModel _viewModel;
+
+	public DatePickerMainControlPage(DatePickerViewModel viewModel)
+	{
+		InitializeComponent();
+		_viewModel = viewModel;
+		BindingContext = _viewModel;
+
+		// Display initial culture formatting information
+		DisplayCultureSpecificDate(_viewModel.Date, _viewModel.Culture);
+	}
+
+	protected override void OnAppearing()
+	{
+		base.OnAppearing();
+		// Refresh culture display when returning to the page
+		DisplayCultureSpecificDate(_viewModel.Date, _viewModel.Culture);
+	}
+
+	private async void NavigateToOptionsPage_Clicked(object sender, EventArgs e)
+	{
+		// Reset culture to default when navigating to options page
+		_viewModel.Culture = System.Globalization.CultureInfo.CurrentCulture;
+
+		BindingContext = _viewModel = new DatePickerViewModel();
+		ReinitializeDatePicker();
+		await Navigation.PushAsync(new DatePickerOptionsPage(_viewModel));
+	}
+
+	private void ReinitializeDatePicker()
+	{
+		DatePickerLayout.Children.Clear();
+		var datePickerControl = new DatePicker
+		{
+			AutomationId = "DatePickerControl"
+		};
+
+		datePickerControl.SetBinding(DatePicker.CharacterSpacingProperty, new Binding(nameof(DatePickerViewModel.CharacterSpacing)));
+		datePickerControl.SetBinding(DatePicker.DateProperty, new Binding(nameof(DatePickerViewModel.Date)));
+		datePickerControl.DateSelected += OnDateSelected;
+		datePickerControl.SetBinding(DatePicker.FlowDirectionProperty, new Binding(nameof(DatePickerViewModel.FlowDirection)));
+		datePickerControl.SetBinding(DatePicker.FormatProperty, new Binding(nameof(DatePickerViewModel.Format)));
+		datePickerControl.SetBinding(DatePicker.FontAttributesProperty, new Binding(nameof(DatePickerViewModel.FontAttributes)));
+		datePickerControl.SetBinding(DatePicker.FontFamilyProperty, new Binding(nameof(DatePickerViewModel.FontFamily)));
+		datePickerControl.SetBinding(DatePicker.FontSizeProperty, new Binding(nameof(DatePickerViewModel.FontSize)));
+		datePickerControl.SetBinding(DatePicker.IsEnabledProperty, new Binding(nameof(DatePickerViewModel.IsEnabled)));
+		datePickerControl.SetBinding(DatePicker.IsVisibleProperty, new Binding(nameof(DatePickerViewModel.IsVisible)));
+		datePickerControl.SetBinding(DatePicker.MinimumDateProperty, new Binding(nameof(DatePickerViewModel.MinimumDate)));
+		datePickerControl.SetBinding(DatePicker.MaximumDateProperty, new Binding(nameof(DatePickerViewModel.MaximumDate)));
+		datePickerControl.SetBinding(DatePicker.ShadowProperty, new Binding(nameof(DatePickerViewModel.Shadow)));
+		datePickerControl.SetBinding(DatePicker.TextColorProperty, new Binding(nameof(DatePickerViewModel.TextColor)));
+
+		// Set culture directly and update when the view model's culture changes
+		datePickerControl.PropertyChanged += (s, e) =>
+		{
+			if (e.PropertyName == nameof(DatePicker.Date))
+			{
+				DisplayCultureSpecificDate(datePickerControl.Date, _viewModel.Culture);
+			}
+		};
+		_viewModel.PropertyChanged += (s, e) =>
+		{
+			if (e.PropertyName == nameof(DatePickerViewModel.Culture))
+			{
+				DisplayCultureSpecificDate(datePickerControl.Date, _viewModel.Culture);
+			}
+		};
+
+		DatePickerLayout.Children.Add(datePickerControl);
+	}
+
+	private void DisplayCultureSpecificDate(DateTime date, CultureInfo culture)
+	{
+		if (culture != null)
+		{
+			// Apply the culture to the current thread
+			Thread.CurrentThread.CurrentCulture = culture;
+			Thread.CurrentThread.CurrentUICulture = culture;
+
+			// Set default culture for new threads
+			CultureInfo.DefaultThreadCurrentCulture = culture;
+			CultureInfo.DefaultThreadCurrentUICulture = culture;
+		}
+
+		CultureFormatLabel.Text = $"Culture: {culture.Name}, Date: {date.ToString(culture)}";
+	}
+
+	public void OnDateSelected(object sender, DateChangedEventArgs e)
+	{
+		if (e.OldDate.Date != DateTime.Now.Date && e.NewDate != e.OldDate)
+		{
+			OldDateSelectedLabel.Text = e.OldDate.ToString();
+			NewDateSelectedLabel.Text = e.NewDate.ToString();
+		}
+	}
+}