test(styles): Add test for MergedDictionaries XAML in Framework.Resou…

…rces

src/SamplesApp/UITests.Shared/Windows_UI_Xaml/Resources/Test_Dictionary_Linked.xaml

@@ -1,3 +1,5 @@
 <ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
 					xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
+	<SolidColorBrush x:Key="AbominableColorBrush"
+					 Color="Teal" />
 </ResourceDictionary>

src/Uno.UI.Tests/Windows_UI_Xaml/Given_ResourceDictionary.cs

@@ -345,6 +345,16 @@ public void When_Resource_In_Merged_Source_Xaml()
 			AssertContainsColorBrushResource(app.Resources, "StrangeColorBrush", Colors.Gainsboro);
 		}
 
+		[TestMethod]
+		public void When_Resource_In_Merged_Source_Xaml_Element()
+		{
+			var app = UnitTestsApp.App.EnsureApplication();
+
+			var control = new Test_Control();
+
+			AssertContainsColorBrushResource(control.TestGrid.Resources, "AbominableColorBrush", Colors.Teal);
+		}
+
 		[TestMethod]
 		public void When_Resource_In_Merged_Source_Xaml_Check_Source()
 		{