Add TestSceneLetterboxOverlay

osu.Game.Tests/Visual/Gameplay/TestSceneLetterboxOverlay.cs

@@ -0,0 +1,24 @@
+// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
+// See the LICENCE file in the repository root for full licence text.
+
+using osu.Framework.Graphics;
+using osu.Framework.Graphics.Shapes;
+using osu.Game.Screens.Play.Break;
+
+namespace osu.Game.Tests.Visual.Gameplay
+{
+    public partial class TestSceneLetterboxOverlay : OsuTestScene
+    {
+        public TestSceneLetterboxOverlay()
+        {
+            AddRange(new Drawable[]
+            {
+                new Box
+                {
+                    RelativeSizeAxes = Axes.Both
+                },
+                new LetterboxOverlay()
+            });
+        }
+    }
+}