got rid of compile warnings in tests

Author: tig

UnitTests/Views/PanelViewTests.cs

@@ -40,36 +40,36 @@ public void Child_Sets_To_Null_Remove_From_Subviews_PanelView ()
 		{
 			var pv = new PanelView (new Label ("This is a test."));
 			Assert.NotNull (pv.Child);
-			Assert.Equal (1, pv.Subviews [0].Subviews.Count);
+			Assert.Single (pv.Subviews [0].Subviews);
 
 			pv.Child = null;
 			Assert.Null (pv.Child);
-			Assert.Equal (0, pv.Subviews [0].Subviews.Count);
+			Assert.Empty (pv.Subviews [0].Subviews);
 		}
 
 		[Fact]
 		public void Add_View_Also_Sets_Child ()
 		{
 			var pv = new PanelView ();
 			Assert.Null (pv.Child);
-			Assert.Equal (0, pv.Subviews [0].Subviews.Count);
+			Assert.Empty (pv.Subviews [0].Subviews);
 
 			pv.Add (new Label ("This is a test."));
 			Assert.NotNull (pv.Child);
-			Assert.Equal (1, pv.Subviews [0].Subviews.Count);
+			Assert.Single (pv.Subviews [0].Subviews);
 		}
 
 		[Fact]
 		public void Add_More_Views_Remove_Last_Child_Before__Only_One_Is_Allowed ()
 		{
 			var pv = new PanelView (new Label ("This is a test."));
 			Assert.NotNull (pv.Child);
-			Assert.Equal (1, pv.Subviews [0].Subviews.Count);
+			Assert.Single (pv.Subviews [0].Subviews);
 			Assert.IsType<Label> (pv.Child);
 
 			pv.Add (new TextField ("This is a test."));
 			Assert.NotNull (pv.Child);
-			Assert.Equal (1, pv.Subviews [0].Subviews.Count);
+			Assert.Single (pv.Subviews [0].Subviews);
 			Assert.IsNotType<Label> (pv.Child);
 			Assert.IsType<TextField> (pv.Child);
 		}
@@ -79,19 +79,19 @@ public void Remove_RemoveAll_View_Also_Sets_Child_To_Null ()
 		{
 			var pv = new PanelView (new Label ("This is a test."));
 			Assert.NotNull (pv.Child);
-			Assert.Equal (1, pv.Subviews [0].Subviews.Count);
+			Assert.Single (pv.Subviews [0].Subviews);
 
 			pv.Remove (pv.Child);
 			Assert.Null (pv.Child);
-			Assert.Equal (0, pv.Subviews [0].Subviews.Count);
+			Assert.Empty (pv.Subviews [0].Subviews);
 
 			pv = new PanelView (new Label ("This is a test."));
 			Assert.NotNull (pv.Child);
-			Assert.Equal (1, pv.Subviews [0].Subviews.Count);
+			Assert.Single (pv.Subviews [0].Subviews);
 
 			pv.RemoveAll ();
 			Assert.Null (pv.Child);
-			Assert.Equal (0, pv.Subviews [0].Subviews.Count);
+			Assert.Empty (pv.Subviews [0].Subviews);
 		}
 
 		[Fact]