Add test coverage of slider bars with colour provider applied

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

@@ -1,11 +1,15 @@
 // 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.Linq;
 using NUnit.Framework;
+using osu.Framework.Allocation;
 using osu.Framework.Bindables;
 using osu.Framework.Graphics;
 using osu.Framework.Graphics.Containers;
 using osu.Game.Graphics.UserInterfaceV2;
+using osu.Game.Overlays;
 
 namespace osu.Game.Tests.Visual.UserInterface
 {
@@ -19,28 +23,62 @@ namespace osu.Game.Tests.Visual.UserInterface
         {
             AddStep("create component", () =>
             {
-                LabelledSliderBar<double> component;
+                FillFlowContainer flow;
 
-                Child = new Container
+                Child = flow = new FillFlowContainer
                 {
                     Anchor = Anchor.Centre,
                     Origin = Anchor.Centre,
                     Width = 500,
                     AutoSizeAxes = Axes.Y,
-                    Child = component = new LabelledSliderBar<double>
+                    Direction = FillDirection.Vertical,
+                    Children = new Drawable[]
+                    {
+                        new LabelledSliderBar<double>
                         {
                             Current = new BindableDouble(5)
                             {
                                 MinValue = 0,
                                 MaxValue = 10,
                                 Precision = 1,
-                        }
+                            },
-                    }
+                            Label = "a sample component",
+                            Description = hasDescription ? "this text describes the component" : string.Empty,
+                        },
+                    },
                 };
 
-                component.Label = "a sample component";
+                foreach (var colour in Enum.GetValues(typeof(OverlayColourScheme)).OfType<OverlayColourScheme>())
-                component.Description = hasDescription ? "this text describes the component" : string.Empty;
+                {
+                    flow.Add(new OverlayColourContainer(colour)
+                    {
+                        RelativeSizeAxes = Axes.X,
+                        AutoSizeAxes = Axes.Y,
+                        Child = new LabelledSliderBar<double>
+                        {
+                            Current = new BindableDouble(5)
+                            {
+                                MinValue = 0,
+                                MaxValue = 10,
+                                Precision = 1,
+                            },
+                            Label = "a sample component",
+                            Description = hasDescription ? "this text describes the component" : string.Empty,
+                        }
                     });
                 }
+            });
+        }
+
+        private class OverlayColourContainer : Container
+        {
+            [Cached]
+            private OverlayColourProvider colourProvider;
+
+            public OverlayColourContainer(OverlayColourScheme scheme)
+            {
+                colourProvider = new OverlayColourProvider(scheme);
+            }
+        }
     }
 }