Add ISearchBar handler and implement Text

src/Compatibility/Core/src/Android/Renderers/SearchBarRenderer.cs

@@ -253,6 +253,7 @@ void UpdatePlaceholderColor()
 			_hintColorSwitcher?.UpdateTextColor(_editText, Element.PlaceholderColor, _editText.SetHintTextColor);
 		}
 
+		[PortHandler]
 		void UpdateText()
 		{
 			string query = Control.Query;

src/Compatibility/Core/src/iOS/Renderers/SearchBarRenderer.cs

@@ -332,6 +332,7 @@ void UpdatePlaceholder()
 			}
 		}
 
+		[PortHandler]
 		void UpdateText()
 		{
 			// There is at least one scenario where modifying the Element's Text value from TextChanged

src/Controls/samples/Controls.Sample/Pages/MainPage.cs

@@ -27,6 +27,10 @@ void SetupMauiLayout()
 			var verticalStack = new VerticalStackLayout() { Spacing = 5, BackgroundColor = Color.AntiqueWhite };
 			var horizontalStack = new HorizontalStackLayout() { Spacing = 2, BackgroundColor = Color.CornflowerBlue };
 
+			var searchBar = new SearchBar();
+			searchBar.Text = "A search query";
+			verticalStack.Add(searchBar);
+
 			var label = new Label { Text = "This will disappear in ~5 seconds", BackgroundColor = Color.Fuchsia };
 			label.Margin = new Thickness(15, 10, 20, 15);
 

src/Core/src/Core/ISearchBar.cs

@@ -0,0 +1,7 @@
+namespace Microsoft.Maui
+{
+	public interface ISearchBar : IView
+	{
+		string Text { get; }
+	}
+}

src/Core/src/Handlers/Label/LabelHandler.Android.cs

@@ -47,7 +47,7 @@ public static void MapTextDecorations(LabelHandler handler, ILabel label)
 			handler.TypedNativeView?.UpdateTextDecorations(label);
 		}
 
-		static void MapFont(LabelHandler handler, ILabel label)
+		public static void MapFont(LabelHandler handler, ILabel label)
 		{
 			var services = App.Current?.Services 
 				?? throw new InvalidOperationException($"Unable to find service provider, the App.Current.Services was null.");

src/Core/src/Handlers/Label/LabelHandler.iOS.cs

@@ -33,7 +33,7 @@ public static void MapTextDecorations(LabelHandler handler, ILabel label)
 			handler.TypedNativeView?.UpdateTextDecorations(label);
 		}
 
-		static void MapFont(LabelHandler handler, ILabel label)
+		public static void MapFont(LabelHandler handler, ILabel label)
 		{
 			var services = App.Current?.Services ?? 
 				throw new InvalidOperationException($"Unable to find service provider, the App.Current.Services was null.");

src/Core/src/Handlers/SearchBar/SearchBarHandler.Android.cs

@@ -0,0 +1,17 @@
+using AndroidX.AppCompat.Widget;
+
+namespace Microsoft.Maui.Handlers
+{
+	public partial class SearchBarHandler : AbstractViewHandler<ISearchBar, SearchView>
+	{
+		protected override SearchView CreateNativeView()
+		{
+			return new SearchView(Context);
+		}
+
+		public static void MapText(SearchBarHandler handler, ISearchBar searchBar)
+		{
+			handler.TypedNativeView?.UpdateText(searchBar);
+		}
+	}
+}

src/Core/src/Handlers/SearchBar/SearchBarHandler.Standard.cs

@@ -0,0 +1,11 @@
+using System;
+
+namespace Microsoft.Maui.Handlers
+{
+	public partial class SearchBarHandler : AbstractViewHandler<ISearchBar, object>
+	{
+		protected override object CreateNativeView() => throw new NotImplementedException();
+
+		public static void MapText(IViewHandler handler, ISearchBar searchBar) { }
+	}
+}

src/Core/src/Handlers/SearchBar/SearchBarHandler.cs

@@ -0,0 +1,20 @@
+namespace Microsoft.Maui.Handlers
+{
+	public partial class SearchBarHandler
+	{
+		public static PropertyMapper<ISearchBar, SearchBarHandler> SearchBarMapper = new PropertyMapper<ISearchBar, SearchBarHandler>(ViewHandler.ViewMapper)
+		{
+			[nameof(ISearchBar.Text)] = MapText
+		};
+
+		public SearchBarHandler() : base(SearchBarMapper)
+		{
+
+		}
+
+		public SearchBarHandler(PropertyMapper mapper) : base(mapper ?? SearchBarMapper)
+		{
+
+		}
+	}
+}

src/Core/src/Handlers/SearchBar/SearchBarHandler.iOS.cs

@@ -0,0 +1,15 @@
+using System;
+using UIKit;
+
+namespace Microsoft.Maui.Handlers
+{
+	public partial class SearchBarHandler : AbstractViewHandler<ISearchBar, UISearchBar>
+	{
+		protected override UISearchBar CreateNativeView() => new UISearchBar();
+
+		public static void MapText(SearchBarHandler handler, ISearchBar searchBar)
+		{
+			handler.TypedNativeView?.UpdateText(searchBar);
+		}
+	}
+}

src/Core/src/Platform/Android/SearchBarExtensions.cs

@@ -0,0 +1,12 @@
+using AndroidX.AppCompat.Widget;
+
+namespace Microsoft.Maui
+{
+	public static class SearchBarExtensions
+	{
+		public static void UpdateText(this SearchView searchView, ISearchBar searchBar)
+		{
+			searchView.SetQuery(searchBar.Text, false);
+		}
+	}
+}

src/Core/src/Platform/iOS/SearchBarExtensions.cs

@@ -0,0 +1,12 @@
+using UIKit;
+
+namespace Microsoft.Maui
+{
+	public static class SearchBarExtensions
+	{
+		public static void UpdateText(this UISearchBar uiSearchBar, ISearchBar searchBar)
+		{
+			uiSearchBar.Text = searchBar.Text;
+		}
+	}
+}

src/Core/tests/DeviceTests/Handlers/SearchBar/SearchBarHandlerTests.Android.cs

@@ -0,0 +1,15 @@
+using Android.Widget;
+using Microsoft.Maui.Handlers;
+using SearchView = AndroidX.AppCompat.Widget.SearchView;
+
+namespace Microsoft.Maui.DeviceTests
+{
+	public partial class SearchBarHandlerTests
+	{
+		SearchView GetNativeSearchBar(SearchBarHandler searchBarHandler) =>
+			(SearchView)searchBarHandler.View;
+
+		string GetNativeText(SearchBarHandler searchBarHandler) =>
+			GetNativeSearchBar(searchBarHandler).Query;
+	}
+}

src/Core/tests/DeviceTests/Handlers/SearchBar/SearchBarHandlerTests.cs

@@ -0,0 +1,49 @@
+using System.Threading.Tasks;
+using Microsoft.Maui.DeviceTests.Stubs;
+using Microsoft.Maui.Handlers;
+using Xunit;
+
+namespace Microsoft.Maui.DeviceTests
+{
+	[Category(TestCategory.SearchBar)]
+	public partial class SearchBarHandlerTests : HandlerTestBase<SearchBarHandler>
+	{
+		public SearchBarHandlerTests(HandlerTestFixture fixture) : base(fixture)
+		{
+		}
+
+		[Fact(DisplayName = "Text Initializes Correctly")]
+		public async Task TextInitializesCorrectly()
+		{
+			var searchBar = new SearchBarStub
+			{
+				Text = "Test"
+			};
+
+			await ValidatePropertyInitValue(searchBar, () => searchBar.Text, GetNativeText, searchBar.Text);
+		}
+
+		[Theory(DisplayName = "Query Text Updates Correctly")]
+		[InlineData(null, null)]
+		[InlineData(null, "Query")]
+		[InlineData("Query", null)]
+		[InlineData("Query", "Another search query")]
+		public async Task TextUpdatesCorrectly(string setValue, string unsetValue)
+		{
+			var searchBar = new SearchBarStub();
+
+			await ValidatePropertyUpdatesValue(
+				searchBar,
+				nameof(ISearchBar.Text),
+				h =>
+				{
+					var n = GetNativeText(h);
+					if (string.IsNullOrEmpty(n))
+						n = null; // native platforms may not support null text
+					return n;
+				},
+				setValue,
+				unsetValue);
+		}
+	}
+}

src/Core/tests/DeviceTests/Handlers/SearchBar/SearchBarHandlerTests.iOS.cs

@@ -0,0 +1,14 @@
+using Microsoft.Maui.Handlers;
+using UIKit;
+
+namespace Microsoft.Maui.DeviceTests
+{
+	public partial class SearchBarHandlerTests
+	{
+		UISearchBar GetNativeEntry(SearchBarHandler searchBarHandler) =>
+			(UISearchBar)searchBarHandler.View;
+
+		string GetNativeText(SearchBarHandler searchBarHandler) =>
+			GetNativeEntry(searchBarHandler).Text;
+	}
+}

src/Core/tests/DeviceTests/Stubs/SearchBarStub.cs

@@ -0,0 +1,9 @@
+namespace Microsoft.Maui.DeviceTests.Stubs
+{
+	public partial class SearchBarStub : StubBase, ISearchBar
+	{
+		private string _text;
+
+		public string Text { get => _text; set => SetProperty(ref _text, value); }
+	}
+}

src/Core/tests/DeviceTests/TestCategory.cs

@@ -5,6 +5,7 @@ public static class TestCategory
 		public const string Button = "Button";
 		public const string Entry = "Entry";
 		public const string Label = "Label";
+		public const string SearchBar = "SearchBar";
 		public const string Slider = "Slider";
 		public const string Switch = "Switch";
 		public const string Layout = "Layout";