Added all views tester for draw/layout.

Made Adornment support being a subview for testing purposes.

UnitTests/View/Draw/AllViewsDrawTests.cs

@@ -0,0 +1,47 @@
+using Xunit.Abstractions;
+
+namespace Terminal.Gui.LayoutTests;
+
+public class AllViewsDrawTests (ITestOutputHelper _output) : TestsAllViews
+{
+    [Theory]
+    [MemberData (nameof (AllViewTypes))]
+    public void AllViews_Does_Not_Layout (Type viewType)
+    {
+        var view = (View)CreateInstanceIfNotGeneric (viewType);
+
+        if (view == null)
+        {
+            _output.WriteLine ($"Ignoring {viewType} - It's a Generic");
+
+            return;
+        }
+
+        if (view is IDesignable designable)
+        {
+            designable.EnableForDesign ();
+        }
+
+        var drawContentCount = 0;
+        view.DrawContent += (s, e) => drawContentCount++;
+
+        var layoutStartedCount = 0;
+        view.LayoutStarted += (s, e) => layoutStartedCount++;
+
+        var layoutCompleteCount = 0;
+        view.LayoutComplete += (s, e) => layoutCompleteCount++;
+
+        view.SetLayoutNeeded ();
+        view.Layout ();
+
+        Assert.Equal (0, drawContentCount);
+        Assert.Equal (1, layoutStartedCount);
+        Assert.Equal (1, layoutCompleteCount);
+
+        view.Draw ();
+
+        Assert.Equal (1, drawContentCount);
+        Assert.Equal (1, layoutStartedCount);
+        Assert.Equal (1, layoutCompleteCount);
+    }
+}