Add mania skinnable test helpers

osu.Game.Rulesets.Mania.Tests/Skinning/ColumnTestContainer.cs

@@ -0,0 +1,38 @@
+// 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.Allocation;
+using osu.Framework.Graphics;
+using osu.Framework.Graphics.Containers;
+using osu.Game.Rulesets.Mania.UI;
+using osuTK.Graphics;
+
+namespace osu.Game.Rulesets.Mania.Tests.Skinning
+{
+    /// <summary>
+    /// A container to be used in a <see cref="ManiaSkinnableTestScene"/> to provide a resolvable <see cref="Column"/> dependency.
+    /// </summary>
+    public class ColumnTestContainer : Container
+    {
+        protected override Container<Drawable> Content => content;
+
+        private readonly Container content;
+
+        [Cached]
+        private readonly Column column;
+
+        public ColumnTestContainer(int column, ManiaAction action)
+        {
+            this.column = new Column(column)
+            {
+                Action = { Value = action },
+                AccentColour = Color4.Orange
+            };
+
+            InternalChild = content = new ManiaInputManager(new ManiaRuleset().RulesetInfo, 4)
+            {
+                RelativeSizeAxes = Axes.Both
+            };
+        }
+    }
+}