Rename test cases to test scenes inline with the framework change

osu.Game.Tests/Visual/UserInterface/TestSceneButtonSystem.cs

@@ -0,0 +1,48 @@
+// 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 System;
+using System.Collections.Generic;
+using System.Linq;
+using NUnit.Framework;
+using osu.Framework.Graphics;
+using osu.Framework.Graphics.Colour;
+using osu.Framework.Graphics.Shapes;
+using osu.Game.Screens.Menu;
+using osuTK.Graphics;
+
+namespace osu.Game.Tests.Visual.UserInterface
+{
+    [TestFixture]
+    public class TestSceneButtonSystem : OsuTestScene
+    {
+        public override IReadOnlyList<Type> RequiredTypes => new[]
+        {
+            typeof(ButtonSystem),
+            typeof(ButtonArea),
+            typeof(Button)
+        };
+
+        public TestSceneButtonSystem()
+        {
+            OsuLogo logo;
+            ButtonSystem buttons;
+
+            Children = new Drawable[]
+            {
+                new Box
+                {
+                    Colour = ColourInfo.GradientVertical(Color4.Gray, Color4.WhiteSmoke),
+                    RelativeSizeAxes = Axes.Both,
+                },
+                buttons = new ButtonSystem(),
+                logo = new OsuLogo { RelativePositionAxes = Axes.Both }
+            };
+
+            buttons.SetOsuLogo(logo);
+
+            foreach (var s in Enum.GetValues(typeof(ButtonSystemState)).OfType<ButtonSystemState>().Skip(1))
+                AddStep($"State to {s}", () => buttons.State = s);
+        }
+    }
+}