Add visual test scene

osu.Game.Tests/Visual/UserInterface/TestSceneStarRatingDisplayV2.cs

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+// 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.Linq;
+using NUnit.Framework;
+using osu.Framework.Graphics;
+using osu.Framework.Graphics.Containers;
+using osu.Framework.Utils;
+using osu.Game.Beatmaps;
+using osu.Game.Beatmaps.Drawables;
+using osuTK;
+
+namespace osu.Game.Tests.Visual.UserInterface
+{
+    public class TestSceneStarRatingDisplayV2 : OsuTestScene
+    {
+        [Test]
+        public void TestDisplay()
+        {
+            AddStep("load displays", () =>
+            {
+                Child = new FillFlowContainer
+                {
+                    Anchor = Anchor.Centre,
+                    Origin = Anchor.Centre,
+                    AutoSizeAxes = Axes.Both,
+                    Spacing = new Vector2(2f),
+                    Direction = FillDirection.Horizontal,
+                    ChildrenEnumerable = Enumerable.Range(0, 10).Select(i => new FillFlowContainer
+                    {
+                        Anchor = Anchor.Centre,
+                        Origin = Anchor.Centre,
+                        AutoSizeAxes = Axes.Both,
+                        Spacing = new Vector2(2f),
+                        Direction = FillDirection.Vertical,
+                        ChildrenEnumerable = Enumerable.Range(0, 10).Select(j => new StarRatingDisplayV2(new StarDifficulty(i + j * 0.1f, 0))
+                        {
+                            Anchor = Anchor.Centre,
+                            Origin = Anchor.Centre,
+                        })
+                    })
+                };
+            });
+        }
+
+        [Test]
+        public void TestChangingStarRatingDisplay()
+        {
+            StarRatingDisplayV2 starRating = null;
+
+            AddStep("load display", () => Child = starRating = new StarRatingDisplayV2(new StarDifficulty(5.55, 1))
+            {
+                Anchor = Anchor.Centre,
+                Origin = Anchor.Centre,
+            });
+
+            AddRepeatStep("set random value", () =>
+            {
+                starRating.Current.Value = new StarDifficulty(RNG.NextDouble(0.0, 11.0), 1);
+            }, 10);
+
+            AddSliderStep("set exact stars", 0.0, 11.0, 5.55, d =>
+            {
+                if (starRating != null)
+                    starRating.Current.Value = new StarDifficulty(d, 1);
+            });
+        }
+    }
+}