feat: add test for StyleExtensions

src/Uno.Toolkit.RuntimeTests/Tests/StyleExtensionsTest.cs

@@ -0,0 +1,127 @@
+using System.Linq;
+using System.Threading.Tasks;
+using Microsoft.VisualStudio.TestTools.UnitTesting;
+using Uno.Extensions.Specialized;
+using Uno.Toolkit.RuntimeTests.Helpers;
+using Uno.Toolkit.UI;
+using Uno.UI.RuntimeTests;
+
+#if IS_WINUI
+using Microsoft.UI;
+using Microsoft.UI.Xaml;
+using Microsoft.UI.Xaml.Controls;
+using Microsoft.UI.Xaml.Media;
+#else
+using Windows.UI;
+using Windows.UI.Xaml;
+using Windows.UI.Xaml.Controls;
+using Windows.UI.Xaml.Media;
+#endif
+
+namespace Uno.Toolkit.RuntimeTests.Tests;
+
+[TestClass]
+[RunsOnUIThread]
+internal class StyleExtensionsTest
+{
+	[TestMethod]
+	public async Task StyleExtensionsResourcesPropertyAppliedToStyleTest()
+	{
+		// Arrange
+		var colorBrush = new SolidColorBrush(Colors.DarkGreen);
+		var testKey = "TestKey";
+
+		var resourceDictionary = new ResourceDictionary
+		{
+			{ testKey, colorBrush }
+		};
+
+		var style = new Style(typeof(Button))
+		{
+			Setters =
+			{
+				new Setter { Property = StyleExtensions.ResourcesProperty, Value = resourceDictionary }
+			}
+		};
+
+		var button = new Button
+		{
+			Style = style
+		};
+
+
+		// Act
+		await UnitTestUIContentHelperEx.SetContentAndWait(button);
+
+		// Assert
+		Assert.AreEqual(button.Resources[testKey], colorBrush);
+	}
+
+	[TestMethod]
+	public async Task StyleExtensionsResourcesPropertyAppliedToControlTest()
+	{
+		// Arrange
+		var testValue = "TestValue";
+		var testKey = "TestKey";
+
+		var button = new Button();
+
+		var resourceDictionary = new ResourceDictionary
+		{
+			{ testKey, testValue }
+		};
+
+		// Act
+		StyleExtensions.SetResources(button, resourceDictionary);
+
+		await UnitTestUIContentHelperEx.SetContentAndWait(button);
+
+		// Assert
+		Assert.AreEqual(button.Resources[testKey], testValue);
+	}
+
+	[TestMethod]
+	public async Task StyleExtensionsOldResourcesRemovedWhenDictionaryChangesTest()
+	{
+		// Arrange
+		var initialColorBrush = new SolidColorBrush(Colors.DarkGreen);
+		var initialKey = "InitialKey";
+
+		var updatedColorBrush = new SolidColorBrush(Colors.Red);
+		var updatedKey = "UpdatedKey";
+
+		var initialResourceDictionary = new ResourceDictionary
+		{
+			{ initialKey, initialColorBrush }
+		};
+
+		var updatedResourceDictionary = new ResourceDictionary
+		{
+			{ updatedKey, updatedColorBrush }
+		};
+
+		var style = new Style(typeof(Button))
+		{
+			Setters =
+			{
+				new Setter { Property = StyleExtensions.ResourcesProperty, Value = initialResourceDictionary }
+			}
+		};
+
+		var button = new Button
+		{
+			Style = style
+		};
+
+		// Act
+		// Update the resource dictionary applied to the button
+		StyleExtensions.SetResources(button, updatedResourceDictionary);
+		await UnitTestUIContentHelperEx.SetContentAndWait(button);
+
+		// Assert
+		// The button's resources should now have the updated brush, not the initial one
+		Assert.AreEqual(button.Resources[updatedKey], updatedColorBrush);
+		Assert.IsFalse(button.Resources.Contains(initialKey));
+	}
+
+}